WO2023092871A1 - Working link, valve port independent control type multi-way valve, and engineering machine - Google Patents

Working link, valve port independent control type multi-way valve, and engineering machine Download PDF

Info

Publication number
WO2023092871A1
WO2023092871A1 PCT/CN2022/077059 CN2022077059W WO2023092871A1 WO 2023092871 A1 WO2023092871 A1 WO 2023092871A1 CN 2022077059 W CN2022077059 W CN 2022077059W WO 2023092871 A1 WO2023092871 A1 WO 2023092871A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
working
port
valve
control
Prior art date
Application number
PCT/CN2022/077059
Other languages
French (fr)
Chinese (zh)
Inventor
孙辉
王晓娟
刘灿杰
孙珍菊
张志伟
Original Assignee
江苏汇智高端工程机械创新中心有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏汇智高端工程机械创新中心有限公司 filed Critical 江苏汇智高端工程机械创新中心有限公司
Publication of WO2023092871A1 publication Critical patent/WO2023092871A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components

Definitions

  • the invention relates to the technical field of hydraulic pressure, in particular to a multi-way valve with a working joint and an independently controlled valve port and construction machinery.
  • the main engine of construction machinery is developing in the direction of intelligence and greenness.
  • Existing construction machinery adopts the traditional slide valve form multi-way valve to control the actuator.
  • Large size, poor state awareness, etc. and cannot meet the requirements of future electronic control and intelligent assistance for high-precision control of position/speed, which seriously affects the host's controllability, load adaptability, running stability and energy saving.
  • the valve port independent control technology can control the pressure/flow of the two chambers of the actuator separately, and has the advantages of flexible valve control, strong load adaptability, low energy consumption, and precise control, representing the development direction of high-end hydraulic valves.
  • the multi-way valve is a multi-functional integrated valve with more than two reversing valves as the main body, which integrates the reversing valve, check valve, overload valve, oil replenishment valve and brake valve. It is the core part of the hydraulic system of construction machinery. It is located between the pump and the actuator, and is used to control the flow and direction of the hydraulic oil, so as to centrally control the movement direction and speed of the actuator of the construction machinery.
  • throttling multi-way valves for construction machinery: throttling multi-way valves, negative flow multi-way valves, positive flow multi-way valves, and load-sensing multi-way valves.
  • the flow of throttling multi-way valve, negative flow multi-way valve, and positive flow multi-way valve is affected by the change of load pressure, and when the action is consistent, the flow will flow to the actuator with a small load, resulting in the flow cannot be distributed according to the expected state, so ,
  • the hydraulic system of construction machinery that requires high control accuracy mostly uses load-sensitive multi-way valves.
  • FIG. 1 The schematic diagram is shown in Figure 1, of which 1' and 2' are the main Spool, the main spool 1' controls the oil in and out of the A port, the main spool 2' controls the oil in and out of the B port, 3' and 4' are the pilot spools, the pilot spool 3' controls the working state of the main spool 1', the pilot The spool 4' controls the working state of the main spool 2' to realize the independent control of the oil in and out of the A and B ports.
  • the above CMA90 and CMA200 multi-way valves of Eaton Company the A and B ports are controlled separately to realize the independent function of the valve port, but it is equipped with multiple temperature and pressure integrated sensors and displacement sensors, which are controlled by calculating the flow and pressure control methods.
  • the system is complex, and there are many parameters that affect the control accuracy, such as oil temperature, oil viscosity, etc., resulting in an unstable control system.
  • its oil port layout is different from that of traditional multi-way valves, the cost of multiple sensors is high, and various factors make it impossible to apply in large quantities.
  • the present invention provides a multi-way valve with working coupling and independent control of valve ports and engineering machinery.
  • the present invention provides a working couplet.
  • a work association including:
  • the valve body is provided with an oil supply port P, a working oil port A, and a working oil port B.
  • the main spool 1 is movably arranged in the valve body, and is used to control the oil outlet of working oil port A and the oil return of working oil port B, or control the oil outlet of working oil port B and the oil return of working oil port A,
  • the second main valve core is movably arranged in the valve body, and is used to control the amount of oil entering the working union from the oil supply port P,
  • the pilot control module includes a first pilot control unit for controlling the movement of the main spool one and a second pilot control unit for controlling the movement of the main spool two.
  • valve body is provided with an oil return port T1, an oil return port T2, an oil supply oil circuit, and a working oil circuit,
  • the oil supply circuit communicates from the oil supply port P to the position of the main valve core 1 through the main valve core 2,
  • the working oil passage includes a first working oil passage and a second working oil passage, the first working oil passage is formed between the position of the main spool one and the working oil port A, and the second working oil passage The oil passage is formed between the position of the main spool one and the working oil port B,
  • the oil supply oil circuit When the main spool one controls the oil output from the working oil port A and the oil return from the working oil port B, the oil supply oil circuit is connected to the first working oil circuit, and the second working oil circuit is connected to The oil return port T2; when the main spool one controls the oil output from the working oil port B and the oil return from the working oil port A, the oil supply oil circuit communicates with the second working oil circuit, and the The first working oil passage is connected with the oil return port T1.
  • a first port relief valve is provided in the first working oil circuit, and a second port relief valve is provided in the second working oil circuit.
  • the working union also includes a differential pressure control module, which is arranged between the oil supply port P and the second main valve core, and is used to control the oil inlet and outlet of the main valve core two to have a constant pressure difference.
  • a differential pressure control module which is arranged between the oil supply port P and the second main valve core, and is used to control the oil inlet and outlet of the main valve core two to have a constant pressure difference.
  • the differential pressure control module is a compensating spool.
  • the first pilot control unit has a first pilot control oil circuit and a second pilot control oil circuit, and the first pilot control oil circuit and the second pilot control oil circuit are connected to the main valve core one respectively.
  • the two control chambers; the second pilot control unit has a third pilot control oil circuit, and the third pilot control oil circuit is connected to the spring chamber of the main valve core two.
  • the first pilot control unit includes a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve
  • the first pilot control oil circuit leads from the outlet of the first electric proportional pressure reducing valve
  • the second pilot control oil circuit leads from the outlet of the second electric proportional pressure reducing valve
  • the second pilot control unit includes a third electric proportional pressure reducing valve
  • the third pilot control oil circuit leads from the first electric proportional pressure reducing valve.
  • the outlet of the three-electric proportional pressure reducing valve is led out.
  • the first pilot control unit includes a first electric proportional reversing valve, and the first pilot control oil circuit and the second pilot control oil circuit are connected respectively from the first electric proportional reversing valve.
  • the second pilot control unit includes a second electric proportional reversing valve, and the third pilot control oil circuit is led out from the outlet of the second electric proportional reversing valve.
  • the above-mentioned working union also includes a control handle and a controller for receiving a control signal of the control handle through the CAN bus, and the controller calculates the main valve core one and/or the The displacement of the main spool two, and control the main spool one and/or the main spool two through the corresponding first electric proportional reversing valve and/or the second electric proportional reversing valve move.
  • the main spool is provided with an LS oil port and a load feedback oil passage
  • the oil supply oil passage is connected to the load feedback oil passage through the LS oil port
  • the valve body is provided with a first load-sensing oil circuit and a second load-sensing oil circuit
  • the first load-sensing oil circuit is provided with a first LS relief valve
  • the second load-sensing oil circuit is provided with a second LS relief valve
  • the load feedback oil passage communicates with the first load sensitive oil passage; when working oil port B outputs oil and working oil port A returns oil, the The load feedback oil passage communicates with the second load sensing oil passage.
  • the above-mentioned working couple also includes an electronically controlled LS relief valve, the inlet of the electronically controlled LS relief valve is connected to the load feedback oil passage, the first load sensing oil passage or the second load sensing oil passage .
  • the valve body is provided with a first control selection oil passage, a second control selection oil passage and a third control selection oil passage, the first control selection oil passage is used to communicate with the electronically controlled LS overflow
  • the inlet of the valve is connected with the first load-sensing oil circuit
  • the second control selection oil circuit is used to connect the inlet of the electronically controlled LS relief valve with the second load-sensing oil circuit
  • the third control selection The oil passage is used to connect the inlet of the electronically controlled LS relief valve with the load feedback oil passage.
  • the second main spool is replaced with a plug
  • the first main spool is provided with an LSA oil port, an LSB oil port and a load feedback oil passage
  • the oil supply oil passage passes through the LSA oil port
  • the LSB oil port is connected to the load feedback oil passage
  • a first load sensing oil passage and a second load sensing oil passage are opened on the valve body
  • a first LS overflow is arranged on the first load sensing oil passage.
  • a flow valve, a second LS relief valve is arranged on the second load sensing oil circuit
  • the present application provides a multi-way valve with independent valve port control.
  • a multi-way valve with independent control of valve ports including one or more working unions as described in any one of the above.
  • the present application provides a construction machine.
  • a construction machine includes the aforementioned multi-way valve with independent control of valve ports.
  • the technical solution of the present invention has the following beneficial effects: the working union of the present invention can realize separate control of the oil inlet and outlet, and can adopt manual, electro-hydraulic proportional control, and CAN bus control methods. Solve the problem of mechanical solid connection between the inlet and outlet ports of traditional multi-way valves, increase the degree of control freedom; solve the problems of complex control and unstable control of the existing independent valve ports, and have simple structure, high flow control accuracy, and low cost. It is also possible to switch between the valve port independent valve and the traditional pre-valve compensation load-sensing multi-way valve through different plug-in combinations.
  • control methods such as calculated flow control and calculated pressure control can be realized without changing the structure of the valve body.
  • the main valve core 2 is replaced with a plug, and By changing the form of the orifice on the main spool one, the function of the pre-valve compensation load-sensing multi-way valve with traditional structure can be realized through the working union of this design.
  • Figure 1 is the schematic diagram of Eaton's CMA90 and CMA200 multi-way valves
  • Fig. 2 is the schematic diagram of embodiment one of the working couplet of the present invention.
  • Fig. 3 is a schematic structural view of Embodiment 1 of the working couplet of the present invention.
  • Fig. 4 is the schematic diagram of embodiment two of the working couplet of the present invention.
  • Fig. 5 is the schematic diagram of embodiment three of the working couplet of the present invention.
  • Fig. 6 is a schematic structural diagram of Embodiment 4 of the working couplet of the present invention.
  • a working union includes a valve body, a main spool 1, a main spool 2 and a pilot control module.
  • the valve body is provided with an oil supply port P, a working oil port A, a working Oil port B
  • the main spool one 1 is movably set in the valve body, used to control the oil outlet of working oil port A and the oil return of working oil port B, or control the oil outlet of working oil port B and the oil return of working oil port A
  • the main spool two 2 is movably arranged in the valve body, and is used to control the oil intake from the oil supply port P into the working union
  • the pilot control module includes the first pilot control for controlling the movement of the main spool one 1 unit and a second pilot control unit for controlling the movement of the main spool two.
  • the valve body is provided with an oil return port T1, an oil return port T2, an oil supply circuit, and a working oil circuit.
  • the oil supply circuit is connected from the oil supply port P through the main valve core 2 to the main valve core 1 position, the working oil circuit includes the first working oil circuit and the second working oil circuit, the first working oil circuit is formed between the position of the main valve core 1 and the working oil port A, and the second working oil circuit is formed at the main valve Between the position of the core one 1 and the working oil port B, when the main valve core one 1 controls the oil outlet of the working oil port A and the oil return of the working oil port B, the oil supply oil circuit is connected with the first working oil circuit, and the second working oil circuit When the main spool 1 controls the oil outlet of working oil port B and the oil return of working oil port A, the oil supply oil line is connected with the second working oil line, and the first working oil line is connected with the oil return port.
  • the first port relief valve 5.1 is set in the first working oil circuit
  • the second port relief valve 5.2 is set in the second working oil circuit
  • the first port relief valve 5.1 and the second port relief valve 5.2 are used It is used to set the maximum working pressure of ports A and B to protect the actuator.
  • the above-mentioned working union also includes a differential pressure control module, which is arranged between the oil supply port P and the main spool 2, and is used to control the oil inlet and outlet of the main spool 2 to have a constant pressure.
  • the differential pressure control module in this embodiment selects the compensating spool 3.
  • the first pilot control unit has a first pilot control oil circuit and a second pilot control oil circuit, and the first pilot control oil circuit and the second pilot control oil circuit are respectively connected to the two main spool one Control chamber; the second pilot control unit has a third pilot control oil circuit, and the third pilot control oil circuit is connected to the spring chamber of the main valve core two 2 .
  • the first pilot control unit includes a first electric proportional pressure reducing valve 4.1 and a second electric proportional pressure reducing valve 4.2
  • the first pilot control oil circuit leads from the outlet of the first electric proportional pressure reducing valve 4.1
  • the second The second pilot control oil circuit leads from the outlet of the second electric proportional pressure reducing valve 4.2
  • the second pilot control unit includes the third electric proportional pressure reducing valve 4.3
  • the third pilot control oil circuit leads from the outlet of the third electric proportional pressure reducing valve 4.3 lead out.
  • the main spool one 1 is used to control the oil inlet direction and the oil return back pressure.
  • the main spool two 2 is used to control the oil flow.
  • One end of the compensating spool 3 is provided with a spring, the spring-free end is the main spool 2 inlet pressure, and the spring end is the main spool 2 outlet pressure, which is used to control the pressure difference between the main spool 2 inlet and outlet, so that the main spool 2
  • the pressure difference between the oil inlet and outlet of the spool 2 remains approximately constant, thereby increasing the control accuracy of the oil inlet flow.
  • the main spool 1 and the main spool 2 are used together to realize the independent control of the oil return back pressure and the oil inlet flow of the actuator, so as to realize the independent function of the valve port.
  • the above-mentioned working joint can also directly remove the compensating spool 3, set a pressure sensor at the oil inlet and outlet, set a displacement sensor at the main spool 2 and 2 valves, and use the calculated flow-pressure difference control algorithm to control the flow of the actuator.
  • the oil supply port P between the working joints reaches P1 through the throttle port of the compensation spool 3, and P1 is connected to the oil inlet chamber of the main spool 2, and the oil pressure in the P1 chamber passes through the internal oil of the compensation spool 3 at the same time. It reaches the compensation spool 3 non-spring chamber P3, P1 reaches the P2 port after passing through the main spool 2, the displacement of the main spool 2 2 is controlled by the third electric proportional pressure reducing valve 4.3, and the pressure of the P2 oil passage can be controlled by the main spool 2.
  • the internal oil passage of spool 1 reaches oil passage P4, and finally reaches the spring cavity of compensation spool 3, thereby ensuring that the pressure difference before and after the throttle port of main spool 2 is approximately constant, so that the flow through main spool 2 is only the same as that of the main spool 22 is related to the over-current area, and the main spool 22 over-current area is determined by the displacement of the main spool 22, and the displacement of the main spool 22 is determined by the third electric proportional pressure reducing valve 4.3, and the third electric proportional pressure reducing valve 4.3 Output a pilot control pressure proportional to its control current to control the displacement of the main spool 2 2, and finally the main spool 2 2 passes through the flow rate proportional to the control current of the third electric proportional pressure reducing valve 4.3.
  • the main spool one 1 changes direction, and the hydraulic oil reaches the working oil port A/B through the main spool one 1.
  • the movement direction of the main spool one 1 is controlled by the first electric proportional pressure reducing valve 4.1 and the second electric proportional pressure reducing valve 4.2.
  • the main spool one 1 middle P2 port to the working port The covering amount of oil port A/B is less than the covering amount from working oil port A/B to oil return port T1/T2, so as to ensure that when the flow area from working oil port A/B to oil return port T1/T2 is small, P2 port to work Port B/A still has a large flow area.
  • the spool 1 controls the oil inlet direction and the oil return throttle area
  • the spool 2 controls the oil inlet flow, so as to realize the independent control of the oil inlet and outlet.
  • the compensation spool 3 is set before the main spool 2, and the pre-valve compensation load-sensing principle is adopted to realize precise control of the flow rate, and the control is simple and stable.
  • the above-mentioned working union also includes an electronically controlled LS overflow valve 9, the inlet of the electronically controlled LS overflow valve 9 is connected to the load feedback oil passage, the first load sensitive oil passage or the second load sensitive oil passage, and the valve
  • the body is provided with a first control selection oil circuit 8.1, a second control selection oil circuit 8.2 and a third control selection oil circuit 8.3.
  • the first control selection oil circuit 8.1 is used to connect the inlet of the electronically controlled LS relief valve 9 with the first The load sensitive oil circuit
  • the second control selection oil circuit 8.2 is used to connect the inlet of the electronically controlled LS relief valve 9 with the second load sensitive oil circuit
  • the third control selection oil circuit 8.3 is used to communicate with the electronically controlled LS relief valve 9
  • the inlet and the load feedback oil passage (main spool-axial and radial oil passages), and a check valve 7 is arranged between the load feedback oil passage and the LS oil passage on the valve body.
  • the first control selection oil circuit 8.1, the second control selection oil circuit 8.2 and the third control selection oil circuit 8.3 communicate with the LSA, LSB, and LS oil passages in the valve seat of the electric control LS relief valve 9, and the electric control LS relief valve
  • the LSA, LSB, and LS oil passages in the valve seat of 9 communicate with the oil inlet oil passage of the electronically controlled LS relief valve 9 at the same time.
  • the electric control LS relief valve 9 can remotely control the LSA pressure.
  • remote control of LSB, LS oil circuit pressure By analogy, remote control of LSB, LS oil circuit pressure.
  • the first pilot control unit includes a first electric proportional reversing valve 10.1, and the first pilot control oil circuit and the second pilot control oil circuit are drawn from two outlets of the first electric proportional reversing valve 10.1 respectively;
  • the second pilot control unit includes a second electric proportional reversing valve 10.2, the third pilot control oil circuit leads from the outlet of the second electric proportional reversing valve 10.2, and the above-mentioned working union also includes a control handle and a handle for receiving the control handle through the CAN bus
  • the controller of the control signal, the controller calculates the displacement of the main spool one 1 and/or the main spool two 2 according to the control signal, and through the corresponding first electric proportional reversing valve 10.1 and/or the second electric proportional
  • the reversing valve 10.2 controls the movement of main spool one 1 and/or main spool two 2 .
  • the control handle end cover gives a signal, the signal is transmitted to the controller through the CAN line, calculates the required displacement of the main valve core 1 and the main valve core 2 2 and outputs the control current signal to the corresponding first electric proportional converter
  • the directional valve 10.1 and the second electric proportional directional valve 10.2, the first electric proportional directional valve 10.1 and the second electric proportional directional valve 10.2 start reversing, causing the main spool one 1 and the main spool two 2 to move, through displacement
  • the sensor monitors the displacement of the spool in real time, and when the corresponding spool reaches the required displacement, the corresponding first electric proportional reversing valve 10.1 and/or the second electric proportional reversing valve 10.2 are controlled to be powered off.
  • the above-mentioned main spool 1 is provided with an LS oil port and a load feedback oil passage, the oil supply oil passage is connected to the load feedback oil passage through the LS oil port, and the first load sensitive oil passage and the second load sensitive oil passage are opened on the valve body.
  • the first LS relief valve 6.1 is installed on the first load-sensing oil circuit
  • the second LS relief valve 6.2 is installed on the second load-sensing oil circuit.
  • the load feedback oil passage is connected with the first load-sensing oil passage; when the working oil port B outputs oil and the working oil port A returns oil, the load feedback oil passage is connected with the second load-sensing oil passage, when the working oil port A, working oil
  • the corresponding LS relief valve opens, the pressure of working oil port A and working oil port B continues to rise, and the pressure of the corresponding LS oil circuit no longer follows the increase, resulting in The flow capacity of the compensating spool 3 is reduced, thereby reducing the flow rate of the actuator and playing a role of safety protection.
  • LSA and LSB pressure measuring oil ports can be correspondingly provided to measure the pressure of the corresponding LS oil circuit.
  • the pressure measuring oil passages of working oil port A, working oil port B and P2 can be reserved in the valve body, which can be realized by measuring the pressure of working oil port A, working oil port B and the pressure of P port and P2 port.
  • the control algorithm of flow control and calculation pressure control is used to control the flow and pressure of the main oil circuit.
  • the oil supply oil is connected to the load feedback oil passage through the LSA oil port or the LSB oil port.
  • the first load sensing oil passage and the second load sensing oil passage are arranged on the valve body, and the first LS relief valve 6.1 is set on the first load sensing oil passage.
  • the second LS relief valve 6.2 is set on the second load sensing oil circuit, when oil is discharged from the working oil port A and oil is returned from the working oil port B, the LSA oil port communicates with the first load sensing oil circuit through the load feedback oil channel;
  • the working oil port B outputs oil and the working oil port A returns oil
  • the LSB oil port communicates with the second load sensing oil line through the load feedback oil channel;
  • the higher pressure in ports A and B is used as control oil to lead to the spring chamber of the compensation valve
  • the compensation spool 3 is provided with a spring, the pressure in the unspring chamber is the same as that of the oil inlet of the main spool 1, the pressure of the spring chamber is the same as the pressure of the oil outlet of the main spool 1, and the compensation valve keeps the oil in and out of the main spool 1
  • the port pressure difference is approximately constant, realizing the function of the traditional pre-valve compensation load-sensing multi-way valve.
  • the above-mentioned working couplet of the present invention is applied to a multi-way valve with independent control of the valve port to realize independent control of the oil inlet and outlet.
  • the above-mentioned multi-way valve with independent valve port control of the present invention is applied to engineering machinery to improve the performance of the whole machine.
  • the advantages of the multi-way valve with independent control of the valve port and construction machinery in the embodiment of the present invention are that the working joint can realize the independent control of the oil inlet and outlet, and can use manual, electro-hydraulic Proportional control, CAN bus control mode.
  • Solve the problem of mechanical solid connection between the inlet and outlet ports of traditional multi-way valves increase the degree of control freedom; solve the problems of complex control and unstable control of existing independent valves at valve ports, and have simple structure, high flow control accuracy, and low cost. It is also possible to switch between the valve port independent valve and the traditional pre-valve compensation load-sensing multi-way valve through different plug-in combinations.
  • control methods such as calculated flow control and calculated pressure control can be realized without changing the structure of the valve body.
  • the main valve core 2 is replaced with a plug, and By changing the form of the orifice on the main spool one, the function of the pre-valve compensation load-sensitive multi-way valve with the traditional structure can be realized through the working joint of this design. performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A working link, a valve port independent control type multi-way valve, and an engineering machine. The working link can realize independent control over an oil inlet and an oil outlet, and can use a manual control mode, an electro-hydraulic proportion control mode, and a CAN bus control mode. The problem of the mechanical fixation of an oil inlet and an oil outlet of a traditional multi-way valve is solved, and the degree of freedom for control is increased; and the problems of control over an existing port-independent valve being complex and unstable are solved; moreover, the structure is simple, the flow control precision is high, the cost is low, and the switching between the valve port independent valve and a traditional pre-compensation load-sensitive multi-way valve can be achieved. Flow calculation control and pressure calculation control can be realized on the premise of not changing the structure of a valve body, a second main valve core (2) is replaced with a plug (12), and the pattern of a throttling opening on a first main valve core (1) is changed, such that the function of a pre-compensation load-sensitive multi-way valve of a traditional structure can be achieved by means of the working link, thereby improving the performance of a valve port independent control type multi-way valve and even of the engineering machine.

Description

工作联、阀口独立控制型多路阀及工程机械Multi-way valve with independent control of working joint and valve port and engineering machinery 技术领域technical field
本发明涉及液压技术领域，特别是涉及一种工作联、阀口独立控制型多路阀及工程机械。The invention relates to the technical field of hydraulic pressure, in particular to a multi-way valve with a working joint and an independently controlled valve port and construction machinery.
背景技术Background technique
工程机械主机向智能化、绿色化方向发展，现有工程机械采用传统滑阀形式多路阀控制执行器，存在进出油口机械固联、只能控制执行器一个腔的压力或流量、压力损失大、状态感知差等缺点，同时不能满足未来电控化、智能辅助对位置/速度高精准控制要求，严重影响主机操控性、负载适应性、运行平稳性和节能性。阀口独立控制技术可分别控制执行器两腔的压力/流量，具有控制柔性阀、负载适应性强、能耗低、控制精准等优势，代表高端液压阀的发展方向。The main engine of construction machinery is developing in the direction of intelligence and greenness. Existing construction machinery adopts the traditional slide valve form multi-way valve to control the actuator. There is a mechanical connection between the inlet and outlet ports, and only the pressure or flow and pressure loss of one chamber of the actuator can be controlled. Large size, poor state awareness, etc., and cannot meet the requirements of future electronic control and intelligent assistance for high-precision control of position/speed, which seriously affects the host's controllability, load adaptability, running stability and energy saving. The valve port independent control technology can control the pressure/flow of the two chambers of the actuator separately, and has the advantages of flexible valve control, strong load adaptability, low energy consumption, and precise control, representing the development direction of high-end hydraulic valves.
多路阀是以两个以上换向阀为主体，集换向阀、单向阀、过载阀、补油阀和制动阀等于一体的多功能集成阀，是工程机械液压***的核心零件，它位于泵和执行元件之间，用于控制液压油的流量大小和流向，从而集中控制工程机械执行元件的运动方向和速度。The multi-way valve is a multi-functional integrated valve with more than two reversing valves as the main body, which integrates the reversing valve, check valve, overload valve, oil replenishment valve and brake valve. It is the core part of the hydraulic system of construction machinery. It is located between the pump and the actuator, and is used to control the flow and direction of the hydraulic oil, so as to centrally control the movement direction and speed of the actuator of the construction machinery.
目前，工程机械用多路阀主要有节流型多路阀、负流量多路阀、正流量多路阀、负载敏感多路阀四种。节流型多路阀、负流量多路阀、正流量多路阀的流量受负载压力变化影响，且符合动作时，流量流向负载较小的执行元件而导致流量无法按照预期状态进行分配，因此，对控制精度要求较高的工程机械液压***多采用负载敏感多路阀。At present, there are four main types of multi-way valves for construction machinery: throttling multi-way valves, negative flow multi-way valves, positive flow multi-way valves, and load-sensing multi-way valves. The flow of throttling multi-way valve, negative flow multi-way valve, and positive flow multi-way valve is affected by the change of load pressure, and when the action is consistent, the flow will flow to the actuator with a small load, resulting in the flow cannot be distributed according to the expected state, so , The hydraulic system of construction machinery that requires high control accuracy mostly uses load-sensitive multi-way valves.
伊顿公司的CMA90和CMA200多路阀是目前市面上发展最好、最常用的双阀芯阀口独立控制型多路阀，其原理图如附图1所示，其中1’、2’为主阀芯，主阀芯1’控制A口进出油，主阀芯2’控制B口进出油，3’、4’为先导阀芯，先导阀芯3’控制主阀芯1’工作状态，先导阀芯4’控制主阀芯2’工作状态，实现A、B口进出油的单独控制。Eaton's CMA90 and CMA200 multi-way valves are currently the best-developed and most commonly used double-spool valve port independent control multi-way valves on the market. The schematic diagram is shown in Figure 1, of which 1' and 2' are the main Spool, the main spool 1' controls the oil in and out of the A port, the main spool 2' controls the oil in and out of the B port, 3' and 4' are the pilot spools, the pilot spool 3' controls the working state of the main spool 1', the pilot The spool 4' controls the working state of the main spool 2' to realize the independent control of the oil in and out of the A and B ports.
传统多路阀的进出油口机械固联的特点，导致执行机构的进出油口流量控制相互影响，尤其是对负负载工况下，无法实现流量控制，同时会造成能源的浪费。伊顿公司的上述CMA90和CMA200多路阀，A、B口单独控制，实现阀口独立功能，但是它安装有多个温压一体传感器和位移传感器，采用计算流量、压力控制的方法进行控制，控制***复杂，且影响控制精度的参数较多，如油温、油液粘度等，导致控制***不稳定。此外，其油口布置与传统多路阀油口方向不同，多个传感器成本较高，综合多种因素，导致其无法进行大批量应用。The characteristics of the mechanical connection of the oil inlet and outlet of the traditional multi-way valve lead to the mutual influence of the flow control of the oil inlet and outlet of the actuator, especially in the case of negative load, the flow control cannot be realized, and energy will be wasted at the same time. The above CMA90 and CMA200 multi-way valves of Eaton Company, the A and B ports are controlled separately to realize the independent function of the valve port, but it is equipped with multiple temperature and pressure integrated sensors and displacement sensors, which are controlled by calculating the flow and pressure control methods. The system is complex, and there are many parameters that affect the control accuracy, such as oil temperature, oil viscosity, etc., resulting in an unstable control system. In addition, its oil port layout is different from that of traditional multi-way valves, the cost of multiple sensors is high, and various factors make it impossible to apply in large quantities.
发明内容Contents of the invention
针对现有技术中存在的不足，本发明提供一种工作联、阀口独立控制型多路阀及工程机械。Aiming at the deficiencies in the prior art, the present invention provides a multi-way valve with working coupling and independent control of valve ports and engineering machinery.
第一方面，本发明提供一种工作联。In a first aspect, the present invention provides a working couplet.
一种工作联，包括：A work association, including:
阀体，其上开设有供油口P、工作油口A、工作油口B，The valve body is provided with an oil supply port P, a working oil port A, and a working oil port B.
主阀芯一，能够移动地设置在所述阀体内，用于控制工作油口A出油、工作油口B回油，或者，控制工作油口B出油、工作油口A回油，The main spool 1 is movably arranged in the valve body, and is used to control the oil outlet of working oil port A and the oil return of working oil port B, or control the oil outlet of working oil port B and the oil return of working oil port A,
主阀芯二，能够移动地设置在所述阀体内，用于控制从供油口P进入该工作联的进油量，The second main valve core is movably arranged in the valve body, and is used to control the amount of oil entering the working union from the oil supply port P,
先导控制模块，包括用于控制所述主阀芯一移动的第一先导控制单元和用于控制所述主阀芯二移动的第二先导控制单元。The pilot control module includes a first pilot control unit for controlling the movement of the main spool one and a second pilot control unit for controlling the movement of the main spool two.
可选地，所述阀体上开设有回油口T1、回油口T2、供油油路、工作油路，Optionally, the valve body is provided with an oil return port T1, an oil return port T2, an oil supply oil circuit, and a working oil circuit,
所述供油油路从所述供油口P经所述主阀芯二连通至所述主阀芯一所在的位置，The oil supply circuit communicates from the oil supply port P to the position of the main valve core 1 through the main valve core 2,
所述工作油路包括第一工作油路和第二工作油路，所述第一工作油路形成在所述主阀芯一所在位置至所述工作油口A之间，所述第二工作油路形成在所述主阀芯一所在位置至所述工作油口B之间，The working oil passage includes a first working oil passage and a second working oil passage, the first working oil passage is formed between the position of the main spool one and the working oil port A, and the second working oil passage The oil passage is formed between the position of the main spool one and the working oil port B,
当所述主阀芯一控制所述工作油口A出油、工作油口B回油时，所述供油油路与所述第一工作油路连通，所述第二工作油路连通至所述回油口T2；当所述主阀芯一控制所述工作油口B出油、工作油口A回油时，所述供油油路与所述第二工作油路连通，所述第一工作油路与所述回油口T1。When the main spool one controls the oil output from the working oil port A and the oil return from the working oil port B, the oil supply oil circuit is connected to the first working oil circuit, and the second working oil circuit is connected to The oil return port T2; when the main spool one controls the oil output from the working oil port B and the oil return from the working oil port A, the oil supply oil circuit communicates with the second working oil circuit, and the The first working oil passage is connected with the oil return port T1.
可选地，所述第一工作油路中设置有第一端口溢流阀，所述第二工作油路中设置有第二端口溢流阀。Optionally, a first port relief valve is provided in the first working oil circuit, and a second port relief valve is provided in the second working oil circuit.
可选地，该工作联还包括压差控制模块，其设置在所述供油口P与所述主阀芯二之间，用于控制所述主阀芯二的进油和出油具有恒定的压差。Optionally, the working union also includes a differential pressure control module, which is arranged between the oil supply port P and the second main valve core, and is used to control the oil inlet and outlet of the main valve core two to have a constant pressure difference.
可选地，所述压差控制模块为补偿阀芯。Optionally, the differential pressure control module is a compensating spool.
可选地，所述第一先导控制单元具有第一先导控制油路和第二先导控制油路，所述第一先导控制油路和第二先导控制油路分别连通至所述主阀芯一的两个控制腔；所述第二先导控制单元具有第三先导控制油路，所述第三先导控制油路连通至所述主阀芯二的弹簧腔。Optionally, the first pilot control unit has a first pilot control oil circuit and a second pilot control oil circuit, and the first pilot control oil circuit and the second pilot control oil circuit are connected to the main valve core one respectively. The two control chambers; the second pilot control unit has a third pilot control oil circuit, and the third pilot control oil circuit is connected to the spring chamber of the main valve core two.
可选地，所述第一先导控制单元包括第一电比例减压阀和第二电比例减压阀，所述第一先导控制油路从所述第一电比例减压阀的出口引出，所述第二先导控制油路从所述第二电比例减压阀的出口引出；所述第二先导控制单元包括第三电比例减压阀，所述第三先导控制油路从所述第三电比例减压阀的出口引出。Optionally, the first pilot control unit includes a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve, the first pilot control oil circuit leads from the outlet of the first electric proportional pressure reducing valve, The second pilot control oil circuit leads from the outlet of the second electric proportional pressure reducing valve; the second pilot control unit includes a third electric proportional pressure reducing valve, and the third pilot control oil circuit leads from the first electric proportional pressure reducing valve. The outlet of the three-electric proportional pressure reducing valve is led out.
可选地，所述第一先导控制单元包括第一电比例换向阀，所述第一先导控制油路和所述第二先导控制油路分别从所述第一电比例换向阀的两个出口引出；所述第二先导控制单元包 括第二电比例换向阀，所述第三先导控制油路从所述第二电比例换向阀的出口引出。Optionally, the first pilot control unit includes a first electric proportional reversing valve, and the first pilot control oil circuit and the second pilot control oil circuit are connected respectively from the first electric proportional reversing valve. The second pilot control unit includes a second electric proportional reversing valve, and the third pilot control oil circuit is led out from the outlet of the second electric proportional reversing valve.
可选地，上述工作联还包括控制手柄和用于通过CAN总线接收所述控制手柄的控制信号的控制器，所述控制器根据所述控制信号计算出所述主阀芯一和/或所述主阀芯二的位移量，并通过对应的所述第一电比例换向阀和/或所述第二电比例换向阀控制所述主阀芯一和/或所述主阀芯二移动。Optionally, the above-mentioned working union also includes a control handle and a controller for receiving a control signal of the control handle through the CAN bus, and the controller calculates the main valve core one and/or the The displacement of the main spool two, and control the main spool one and/or the main spool two through the corresponding first electric proportional reversing valve and/or the second electric proportional reversing valve move.
可选地，所述主阀芯一上开设有LS油口和负载反馈油道，所述供油油路通过所述LS油口连通至所述负载反馈油道，所述阀体上开设有第一负载敏感油路和第二负载敏感油路，所述第一负载敏感油路上设置有第一LS溢流阀，所述第二负载敏感油路上设置有第二LS溢流阀，Optionally, the main spool is provided with an LS oil port and a load feedback oil passage, the oil supply oil passage is connected to the load feedback oil passage through the LS oil port, and the valve body is provided with a first load-sensing oil circuit and a second load-sensing oil circuit, the first load-sensing oil circuit is provided with a first LS relief valve, and the second load-sensing oil circuit is provided with a second LS relief valve,
当工作油口A出油、工作油口B回油时，所述负载反馈油道与所述第一负载敏感油路连通；当工作油口B出油、工作油口A回油时，所述负载反馈油道与所述第二负载敏感油路连通。When working oil port A outputs oil and working oil port B returns oil, the load feedback oil passage communicates with the first load sensitive oil passage; when working oil port B outputs oil and working oil port A returns oil, the The load feedback oil passage communicates with the second load sensing oil passage.
可选地，上述工作联还包括电控LS溢流阀，所述电控LS溢流阀的进口连通至所述负载反馈油道、所述第一负载敏感油路或第二负载敏感油路。Optionally, the above-mentioned working couple also includes an electronically controlled LS relief valve, the inlet of the electronically controlled LS relief valve is connected to the load feedback oil passage, the first load sensing oil passage or the second load sensing oil passage .
可选地，所述阀体上开设有第一控制选择油路、第二控制选择油路和第三控制选择油路，所述第一控制选择油路用于连通所述电控LS溢流阀的进口与所述第一负载敏感油路，所述第二控制选择油路用于连通所述电控LS溢流阀的进口与所述第二负载敏感油路，所述第三控制选择油路用于连通所述电控LS溢流阀的进口与所述负载反馈油道。Optionally, the valve body is provided with a first control selection oil passage, a second control selection oil passage and a third control selection oil passage, the first control selection oil passage is used to communicate with the electronically controlled LS overflow The inlet of the valve is connected with the first load-sensing oil circuit, the second control selection oil circuit is used to connect the inlet of the electronically controlled LS relief valve with the second load-sensing oil circuit, and the third control selection The oil passage is used to connect the inlet of the electronically controlled LS relief valve with the load feedback oil passage.
可选地，所述主阀芯二被替换为堵头，所述主阀芯一上开设有LSA油口、LSB油口和负载反馈油道，所述供油油路通过所述LSA油口或者所述LSB油口连通至所述负载反馈油道，所述阀体上开设有第一负载敏感油路和第二负载敏感油路，所述第一负载敏感油路上设置有第一LS溢流阀，所述第二负载敏感油路上设置有第二LS溢流阀，Optionally, the second main spool is replaced with a plug, the first main spool is provided with an LSA oil port, an LSB oil port and a load feedback oil passage, and the oil supply oil passage passes through the LSA oil port Or the LSB oil port is connected to the load feedback oil passage, a first load sensing oil passage and a second load sensing oil passage are opened on the valve body, and a first LS overflow is arranged on the first load sensing oil passage. A flow valve, a second LS relief valve is arranged on the second load sensing oil circuit,
当工作油口A出油、工作油口B回油时，所述LSA油口通过所述负载反馈油道与所述第一负载敏感油路连通；When working oil port A outputs oil and working oil port B returns oil, the LSA oil port communicates with the first load sensing oil channel through the load feedback oil channel;
当工作油口B出油、工作油口A回油时，所述LSB油口通过所述负载反馈油道与所述第二负载敏感油路连通。When working oil port B outputs oil and working oil port A returns oil, the LSB oil port communicates with the second load sensing oil channel through the load feedback oil channel.
第二方面，本申请提供一种阀口独立控制型多路阀。In a second aspect, the present application provides a multi-way valve with independent valve port control.
一种阀口独立控制型多路阀，包括一个或多个如上述的任一项所述的工作联。A multi-way valve with independent control of valve ports, including one or more working unions as described in any one of the above.
第三方面，本申请提供一种工程机械。In a third aspect, the present application provides a construction machine.
一种工程机械，包括上述的阀口独立控制型多路阀。A construction machine includes the aforementioned multi-way valve with independent control of valve ports.
与现有技术相比，本发明的技术方案具有以下有益效果：本发明的工作联能够实现进、出油口的单独控制，可以采用手动、电液比例控制、CAN总线控制方式。解决传统多路阀进、 出油口机械固联的问题，增加控制自由度；解决现有的阀口独立阀控制复杂、控制不稳定的问题，且结构简单、流量控制精度高、成本低，还可通过不同的插件组合，实现阀口独立阀与传统阀前补偿负载敏感多路阀的切换。且在后期随着传感器技术以及控制技术的发展，可以在不改变阀体结构的前提下实现计算流量控制、计算压力控制等的控制方法，再者，将主阀芯二替换为堵头，并改变主阀芯一上的节流口形式，可通过本设计的工作联实现传统结构的阀前补偿负载敏感多路阀的功能。Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the working union of the present invention can realize separate control of the oil inlet and outlet, and can adopt manual, electro-hydraulic proportional control, and CAN bus control methods. Solve the problem of mechanical solid connection between the inlet and outlet ports of traditional multi-way valves, increase the degree of control freedom; solve the problems of complex control and unstable control of the existing independent valve ports, and have simple structure, high flow control accuracy, and low cost. It is also possible to switch between the valve port independent valve and the traditional pre-valve compensation load-sensing multi-way valve through different plug-in combinations. And in the later period, with the development of sensor technology and control technology, control methods such as calculated flow control and calculated pressure control can be realized without changing the structure of the valve body. Moreover, the main valve core 2 is replaced with a plug, and By changing the form of the orifice on the main spool one, the function of the pre-valve compensation load-sensing multi-way valve with traditional structure can be realized through the working union of this design.
附图说明Description of drawings
图1为伊顿公司的CMA90和CMA200多路阀的原理图；Figure 1 is the schematic diagram of Eaton's CMA90 and CMA200 multi-way valves;
图2为本发明的工作联的实施例一的原理图；Fig. 2 is the schematic diagram of embodiment one of the working couplet of the present invention;
图3为本发明的工作联的实施例一的结构示意图；Fig. 3 is a schematic structural view of Embodiment 1 of the working couplet of the present invention;
图4为本发明的工作联的实施例二的原理图；Fig. 4 is the schematic diagram of embodiment two of the working couplet of the present invention;
图5为本发明的工作联的实施例三的原理图；Fig. 5 is the schematic diagram of embodiment three of the working couplet of the present invention;
图6为本发明的工作联的实施例四的结构示意图。Fig. 6 is a schematic structural diagram of Embodiment 4 of the working couplet of the present invention.
附图中：1-主阀芯一，2-主阀芯二，3-补偿阀芯，4.1-第一电比例减压阀，4.2-第二电比例减压阀，4.3-第三电比例减压阀，5.1-第一端口溢流阀，5.2-第二端口溢流阀，6.1-第一LS溢流阀，6.2-第二LS溢流阀，7-单向阀，8.1-第一控制选择油路,8.2-第二控制选择油路，8.3-第三控制选择油路，9-电控LS溢流阀，10.1-第一电比例换向阀，10.2-第二电比例换向阀，11-手动端盖，12-堵头。In the drawings: 1-main spool one, 2-main spool two, 3-compensation spool, 4.1-first electric proportional pressure reducing valve, 4.2-second electric proportional pressure reducing valve, 4.3-third electric proportional Pressure reducing valve, 5.1-first port relief valve, 5.2-second port relief valve, 6.1-first LS relief valve, 6.2-second LS relief valve, 7-check valve, 8.1-first Control selection oil circuit, 8.2-second control selection oil circuit, 8.3-third control selection oil circuit, 9-electric control LS relief valve, 10.1-first electric proportional reversing valve, 10.2-second electric proportional reversing valve Valve, 11-manual end cap, 12-plug.
具体实施方式Detailed ways
以下结合附图对本发明的示范性实施例做出说明，其中包括本发明实施例的各种细节以助于理解，应当将它们认为仅仅是示范性的。因此，本领域普通技术人员应当认识到，可以对这里描述的实施例做出各种改变和修改，而不会背离本发明的范围和精神。同样，为了清楚和简明，以下的描述中省略了对公知功能和结构的描述。Exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
实施例一Embodiment one
如图2和图3所示，一种工作联，包括阀体、主阀芯一1、主阀芯二2和先导控制模块，阀体上开设有供油口P、工作油口A、工作油口B，主阀芯一1能够移动地设置在阀体内，用于控制工作油口A出油、工作油口B回油，或者，控制工作油口B出油、工作油口A回油，主阀芯二2能够移动地设置在阀体内，用于控制从供油口P进入该工作联的进油量，先导控制模块，包括用于控制主阀芯一1移动的第一先导控制单元和用于控制主阀芯二2移动的第二先导控制单元。As shown in Fig. 2 and Fig. 3, a working union includes a valve body, a main spool 1, a main spool 2 and a pilot control module. The valve body is provided with an oil supply port P, a working oil port A, a working Oil port B, the main spool one 1 is movably set in the valve body, used to control the oil outlet of working oil port A and the oil return of working oil port B, or control the oil outlet of working oil port B and the oil return of working oil port A , the main spool two 2 is movably arranged in the valve body, and is used to control the oil intake from the oil supply port P into the working union, and the pilot control module includes the first pilot control for controlling the movement of the main spool one 1 unit and a second pilot control unit for controlling the movement of the main spool two.
具体地，阀体上开设有回油口T1、回油口T2、供油油路、工作油路，供油油路从供油口 P经主阀芯二2连通至主阀芯一1所在的位置，工作油路包括第一工作油路和第二工作油路，第一工作油路形成在主阀芯一1所在位置至工作油口A之间，第二工作油路形成在主阀芯一1所在位置至工作油口B之间，当主阀芯一1控制工作油口A出油、工作油口B回油时，供油油路与第一工作油路连通，第二工作油路连通至回油口T2；当主阀芯一1控制工作油口B出油、工作油口A回油时，供油油路与第二工作油路连通，第一工作油路与回油口T1，第一工作油路中设置有第一端口溢流阀5.1，第二工作油路中设置有第二端口溢流阀5.2，第一端口溢流阀5.1和第二端口溢流阀5.2用于设置A、B口工作最高压力，保护执行机构。Specifically, the valve body is provided with an oil return port T1, an oil return port T2, an oil supply circuit, and a working oil circuit. The oil supply circuit is connected from the oil supply port P through the main valve core 2 to the main valve core 1 position, the working oil circuit includes the first working oil circuit and the second working oil circuit, the first working oil circuit is formed between the position of the main valve core 1 and the working oil port A, and the second working oil circuit is formed at the main valve Between the position of the core one 1 and the working oil port B, when the main valve core one 1 controls the oil outlet of the working oil port A and the oil return of the working oil port B, the oil supply oil circuit is connected with the first working oil circuit, and the second working oil circuit When the main spool 1 controls the oil outlet of working oil port B and the oil return of working oil port A, the oil supply oil line is connected with the second working oil line, and the first working oil line is connected with the oil return port. T1, the first port relief valve 5.1 is set in the first working oil circuit, the second port relief valve 5.2 is set in the second working oil circuit, the first port relief valve 5.1 and the second port relief valve 5.2 are used It is used to set the maximum working pressure of ports A and B to protect the actuator.
在一些实施例中，上述工作联还包括压差控制模块，其设置在供油口P与主阀芯二2之间，用于控制主阀芯二2的进油和出油具有恒定的压差，本实施例中的压差控制模块选用补偿阀芯3。In some embodiments, the above-mentioned working union also includes a differential pressure control module, which is arranged between the oil supply port P and the main spool 2, and is used to control the oil inlet and outlet of the main spool 2 to have a constant pressure. The differential pressure control module in this embodiment selects the compensating spool 3.
在一些实施例中，第一先导控制单元具有第一先导控制油路和第二先导控制油路，第一先导控制油路和第二先导控制油路分别连通至主阀芯一1的两个控制腔；第二先导控制单元具有第三先导控制油路，第三先导控制油路连通至主阀芯二2的弹簧腔。In some embodiments, the first pilot control unit has a first pilot control oil circuit and a second pilot control oil circuit, and the first pilot control oil circuit and the second pilot control oil circuit are respectively connected to the two main spool one Control chamber; the second pilot control unit has a third pilot control oil circuit, and the third pilot control oil circuit is connected to the spring chamber of the main valve core two 2 .
在一些实施例中，第一先导控制单元包括第一电比例减压阀4.1和第二电比例减压阀4.2，第一先导控制油路从第一电比例减压阀4.1的出口引出，第二先导控制油路从第二电比例减压阀4.2的出口引出；第二先导控制单元包括第三电比例减压阀4.3，第三先导控制油路从第三电比例减压阀4.3的出口引出。In some embodiments, the first pilot control unit includes a first electric proportional pressure reducing valve 4.1 and a second electric proportional pressure reducing valve 4.2, the first pilot control oil circuit leads from the outlet of the first electric proportional pressure reducing valve 4.1, the second The second pilot control oil circuit leads from the outlet of the second electric proportional pressure reducing valve 4.2; the second pilot control unit includes the third electric proportional pressure reducing valve 4.3, and the third pilot control oil circuit leads from the outlet of the third electric proportional pressure reducing valve 4.3 lead out.
进一步地，主阀芯一1用来控制进油方向以及回油背压。主阀芯二2用来控制进油流量。补偿阀芯3一端设有弹簧，其无弹簧端为主阀芯二2进口压力，有弹簧端为主阀芯二2出口压力，用来控制主阀芯二2进出油口压差，使主阀芯二2进出油口压差保持近似恒定，从而增高进油流量控制精度。主阀芯一1与主阀芯二2配合使用，实现执行机构回油背压和进油流量的单独控制，从而实现阀口独立的功能。Further, the main spool one 1 is used to control the oil inlet direction and the oil return back pressure. The main spool two 2 is used to control the oil flow. One end of the compensating spool 3 is provided with a spring, the spring-free end is the main spool 2 inlet pressure, and the spring end is the main spool 2 outlet pressure, which is used to control the pressure difference between the main spool 2 inlet and outlet, so that the main spool 2 The pressure difference between the oil inlet and outlet of the spool 2 remains approximately constant, thereby increasing the control accuracy of the oil inlet flow. The main spool 1 and the main spool 2 are used together to realize the independent control of the oil return back pressure and the oil inlet flow of the actuator, so as to realize the independent function of the valve port.
上述的工作联还可将补偿阀芯3直接去除，在进出油口设置压力传感器，在主阀芯二2阀设置位移传感器，采用计算流量—压差控制算法，来控制执行机构流量。The above-mentioned working joint can also directly remove the compensating spool 3, set a pressure sensor at the oil inlet and outlet, set a displacement sensor at the main spool 2 and 2 valves, and use the calculated flow-pressure difference control algorithm to control the flow of the actuator.
工作过程中，工作联之间的供油口P通过补偿阀芯3节流口到达P1，P1与主阀芯二2进油腔相连通，P1腔油液压力同时经过补偿阀芯3内部油道，到达补偿阀芯3非弹簧腔P3，P1经过主阀芯二2之后达到P2口，主阀芯二2阀芯位移由第三电比例减压阀4.3控制，P2油道压力可通过主阀芯一1内部油道达到油道P4，最终达到补偿阀芯3弹簧腔，进而保证主阀芯二2节流口前后压差近似恒定，使通过主阀芯二2流量仅与主阀芯二2过流面积有关，而主阀芯二2过流面积由主阀芯二2位移决定，主阀芯二2位移由第三电比例减压阀4.3决定，第三电比例减压阀4.3输出一个与其控制电流成比例的先导控制压力来控制主阀芯二2位移， 最终主阀芯二2通过与第三电比例减压阀4.3控制电流成比例流量。During the working process, the oil supply port P between the working joints reaches P1 through the throttle port of the compensation spool 3, and P1 is connected to the oil inlet chamber of the main spool 2, and the oil pressure in the P1 chamber passes through the internal oil of the compensation spool 3 at the same time. It reaches the compensation spool 3 non-spring chamber P3, P1 reaches the P2 port after passing through the main spool 2, the displacement of the main spool 2 2 is controlled by the third electric proportional pressure reducing valve 4.3, and the pressure of the P2 oil passage can be controlled by the main spool 2. The internal oil passage of spool 1 reaches oil passage P4, and finally reaches the spring cavity of compensation spool 3, thereby ensuring that the pressure difference before and after the throttle port of main spool 2 is approximately constant, so that the flow through main spool 2 is only the same as that of the main spool 22 is related to the over-current area, and the main spool 22 over-current area is determined by the displacement of the main spool 22, and the displacement of the main spool 22 is determined by the third electric proportional pressure reducing valve 4.3, and the third electric proportional pressure reducing valve 4.3 Output a pilot control pressure proportional to its control current to control the displacement of the main spool 2 2, and finally the main spool 2 2 passes through the flow rate proportional to the control current of the third electric proportional pressure reducing valve 4.3.
液压油经过P2以后，主阀芯一1换向，液压油经过主阀芯一1到达工作油口A/B。主阀芯一1运动方向受第一电比例减压阀4.1和第二电比例减压阀4.2控制。(1)当第一电比例减压阀4.1被给定电流时，产生先导压力通过阀体内部油道达到手动端盖11弹簧腔，阀芯往非弹簧腔侧移动，P2腔油到达工作油口A，工作油口B与回油口T2相通，主阀芯一1位移根据工作油口B压力需要设定，在负负载情况下，工作油口B需要较大压力时，减小阀芯位移，减小工作油口B至回油口T2口过流面积，从而增大工作油口B压力。(2)当第二电比例减压阀4.2被给定电流时，产生先导压力通过阀体内部油道达到主阀芯一1非弹簧腔，阀芯往弹簧腔侧移动，P2腔油到达工作油口B，工作油口A与回油口T1相通，主阀芯一1位移根据工作油口A压力需要设定，在负负载情况下，工作油口A需要较大压力时，减小阀芯位移，减小工作油口A至回油口T1口过流面积，从而增大工作油口A压力。After the hydraulic oil passes through P2, the main spool one 1 changes direction, and the hydraulic oil reaches the working oil port A/B through the main spool one 1. The movement direction of the main spool one 1 is controlled by the first electric proportional pressure reducing valve 4.1 and the second electric proportional pressure reducing valve 4.2. (1) When the first electric proportional pressure reducing valve 4.1 is given a current, the pilot pressure is generated to reach the spring chamber of the manual end cover 11 through the oil passage inside the valve body, the valve core moves to the non-spring chamber side, and the oil in the P2 chamber reaches the working oil Port A, working oil port B are connected with oil return port T2, the displacement of the main spool one 1 is set according to the pressure of working oil port B, under the condition of negative load, when the working oil port B needs higher pressure, reduce the spool The displacement reduces the flow area from working oil port B to oil return port T2, thereby increasing the pressure of working oil port B. (2) When the second electric proportional pressure reducing valve 4.2 is given a current, the pilot pressure generated will reach the main valve core-1 non-spring chamber through the oil passage inside the valve body, the valve core will move to the spring chamber side, and the oil in the P2 chamber will reach the working chamber. Oil port B and working oil port A are connected to oil return port T1. The displacement of the main spool 1 is set according to the pressure requirement of working oil port A. Core displacement reduces the flow area from working oil port A to oil return port T1, thereby increasing the pressure of working oil port A.
当工作油口A/B至回油口T1/T2需要较大背压时，为保证P2口至工作油口B/A不会产生较大压力损失，主阀芯一1中P2口至工作油口A/B遮盖量小于工作油口A/B至回油口T1/T2口遮盖量，保证当工作油口A/B至回油口T1/T2过流面积很小时，P2口至工作油口B/A仍具有较大的过流面积。When a large back pressure is required from the working oil port A/B to the oil return port T1/T2, in order to ensure that there will not be a large pressure loss from the P2 port to the working oil port B/A, the main spool one 1 middle P2 port to the working port The covering amount of oil port A/B is less than the covering amount from working oil port A/B to oil return port T1/T2, so as to ensure that when the flow area from working oil port A/B to oil return port T1/T2 is small, P2 port to work Port B/A still has a large flow area.
即阀芯1控制进油方向与回油节流面积，阀芯2控制进油流量，从而实现进、出油口的单独控制。且在主阀芯二2之前设置补偿阀芯3，采用阀前补偿负载敏感原理，实现流量的精准控制，控制简单且稳定。That is, the spool 1 controls the oil inlet direction and the oil return throttle area, and the spool 2 controls the oil inlet flow, so as to realize the independent control of the oil inlet and outlet. In addition, the compensation spool 3 is set before the main spool 2, and the pre-valve compensation load-sensing principle is adopted to realize precise control of the flow rate, and the control is simple and stable.
实施例二Embodiment two
如图4所示，上述工作联还包括电控LS溢流阀9，电控LS溢流阀9的进口连通至负载反馈油道、第一负载敏感油路或第二负载敏感油路，阀体上开设有第一控制选择油路8.1、第二控制选择油路8.2和第三控制选择油路8.3，第一控制选择油路8.1用于连通电控LS溢流阀9的进口与第一负载敏感油路，第二控制选择油路8.2用于连通电控LS溢流阀9的进口与第二负载敏感油路，第三控制选择油路8.3用于连通电控LS溢流阀9的进口与负载反馈油道(主阀芯一轴心的和径向的油道)，负载反馈油道与阀体上的LS油道之间设置有单向阀7。第一控制选择油路8.1、第二控制选择油路8.2和第三控制选择油路8.3与电控LS溢流阀9的阀座内LSA、LSB、LS油道相通，电控LS溢流阀9的阀座内LSA、LSB、LS油道同时与电控LS溢流阀9的进油油道相连通。需要远程调控LSA油路压力时，可将与电控LS溢流阀9的阀座内LSB、LS油道堵上，仅留LSA油道，此时电控LS溢流阀9可远程调控LSA压力。以此类推，来远程控制LSB、LS油路压力。As shown in Figure 4, the above-mentioned working union also includes an electronically controlled LS overflow valve 9, the inlet of the electronically controlled LS overflow valve 9 is connected to the load feedback oil passage, the first load sensitive oil passage or the second load sensitive oil passage, and the valve The body is provided with a first control selection oil circuit 8.1, a second control selection oil circuit 8.2 and a third control selection oil circuit 8.3. The first control selection oil circuit 8.1 is used to connect the inlet of the electronically controlled LS relief valve 9 with the first The load sensitive oil circuit, the second control selection oil circuit 8.2 is used to connect the inlet of the electronically controlled LS relief valve 9 with the second load sensitive oil circuit, and the third control selection oil circuit 8.3 is used to communicate with the electronically controlled LS relief valve 9 The inlet and the load feedback oil passage (main spool-axial and radial oil passages), and a check valve 7 is arranged between the load feedback oil passage and the LS oil passage on the valve body. The first control selection oil circuit 8.1, the second control selection oil circuit 8.2 and the third control selection oil circuit 8.3 communicate with the LSA, LSB, and LS oil passages in the valve seat of the electric control LS relief valve 9, and the electric control LS relief valve The LSA, LSB, and LS oil passages in the valve seat of 9 communicate with the oil inlet oil passage of the electronically controlled LS relief valve 9 at the same time. When it is necessary to remotely control the pressure of the LSA oil circuit, the LSB and LS oil passages in the valve seat of the electric control LS relief valve 9 can be blocked, and only the LSA oil passage is left. At this time, the electric control LS relief valve 9 can remotely control the LSA pressure. By analogy, remote control of LSB, LS oil circuit pressure.
实施例三Embodiment three
如图5所示，第一先导控制单元包括第一电比例换向阀10.1，第一先导控制油路和第二先导控制油路分别从第一电比例换向阀10.1的两个出口引出；第二先导控制单元包括第二电比例换向阀10.2，第三先导控制油路从第二电比例换向阀10.2的出口引出，上述工作联还包括控制手柄和用于通过CAN总线接收控制手柄的控制信号的控制器，控制器根据控制信号计算出主阀芯一1和/或主阀芯二2的位移量，并通过对应的第一电比例换向阀10.1和/或第二电比例换向阀10.2控制主阀芯一1和/或主阀芯二2移动。工作过程中，控制手柄端盖给定信号，信号通过CAN线传输给控制器，计算出主阀芯一1以及主阀芯二2需要的位移并输出控制电流信号给对应的第一电比例换向阀10.1和第二电比例换向阀10.2，第一电比例换向阀10.1和第二电比例换向阀10.2开始换向，引起主阀芯一1和主阀芯二2运动，通过位移传感器实时监测阀芯的位移，当对应阀芯达到需要位移时，控制对应的第一电比例换向阀10.1和/或第二电比例换向阀10.2断电。当主阀芯一1和主阀芯二2先导油路泄漏导致阀芯位置发生偏移时，第一电比例换向阀10.1和第二电比例换向阀10.2再次得电。因此第一电比例换向阀10.1和第二电比例换向阀10.2一直处于高速通断状态，使主阀芯一1与主阀芯二2一直保持在需求位置，其中的第一电比例换向阀10.1和第二电比例换向阀10.2均选用三位四通电比例换向阀。As shown in Figure 5, the first pilot control unit includes a first electric proportional reversing valve 10.1, and the first pilot control oil circuit and the second pilot control oil circuit are drawn from two outlets of the first electric proportional reversing valve 10.1 respectively; The second pilot control unit includes a second electric proportional reversing valve 10.2, the third pilot control oil circuit leads from the outlet of the second electric proportional reversing valve 10.2, and the above-mentioned working union also includes a control handle and a handle for receiving the control handle through the CAN bus The controller of the control signal, the controller calculates the displacement of the main spool one 1 and/or the main spool two 2 according to the control signal, and through the corresponding first electric proportional reversing valve 10.1 and/or the second electric proportional The reversing valve 10.2 controls the movement of main spool one 1 and/or main spool two 2 . During the working process, the control handle end cover gives a signal, the signal is transmitted to the controller through the CAN line, calculates the required displacement of the main valve core 1 and the main valve core 2 2 and outputs the control current signal to the corresponding first electric proportional converter The directional valve 10.1 and the second electric proportional directional valve 10.2, the first electric proportional directional valve 10.1 and the second electric proportional directional valve 10.2 start reversing, causing the main spool one 1 and the main spool two 2 to move, through displacement The sensor monitors the displacement of the spool in real time, and when the corresponding spool reaches the required displacement, the corresponding first electric proportional reversing valve 10.1 and/or the second electric proportional reversing valve 10.2 are controlled to be powered off. When the main spool one 1 and main spool two 2 pilot oil circuit leakage causes the position of the spool to deviate, the first electric proportional reversing valve 10.1 and the second electric proportional reversing valve 10.2 are energized again. Therefore, the first electric proportional reversing valve 10.1 and the second electric proportional reversing valve 10.2 are always in the high-speed on-off state, so that the main spool one 1 and the main spool two 2 are always kept at the required position, and the first electric proportional reversing valve Both the directional valve 10.1 and the second electric proportional directional valve 10.2 are selected with three-position four-way electric proportional directional valves.
上述的主阀芯一1上开设有LS油口和负载反馈油道，供油油路通过LS油口连通至负载反馈油道，阀体上开设有第一负载敏感油路和第二负载敏感油路，第一负载敏感油路上设置有第一LS溢流阀6.1，第二负载敏感油路上设置有第二LS溢流阀6.2，当工作油口A出油、工作油口B回油时，负载反馈油道与第一负载敏感油路连通；当工作油口B出油、工作油口A回油时，负载反馈油道与第二负载敏感油路连通，当工作油口A、工作油口B的压力超过对应的LS溢流阀压力时，对应的LS溢流阀打开，工作油口A、工作油口B压力继续升高，对应的LS油路压力不再跟随升高，导致补偿阀芯3通流能力减小，从而减小执行机构流量，起到安全保护作用，同时，可对应设置有LSA、LSB测压油口，测量对应LS油路压力。The above-mentioned main spool 1 is provided with an LS oil port and a load feedback oil passage, the oil supply oil passage is connected to the load feedback oil passage through the LS oil port, and the first load sensitive oil passage and the second load sensitive oil passage are opened on the valve body. In the oil circuit, the first LS relief valve 6.1 is installed on the first load-sensing oil circuit, and the second LS relief valve 6.2 is installed on the second load-sensing oil circuit. , the load feedback oil passage is connected with the first load-sensing oil passage; when the working oil port B outputs oil and the working oil port A returns oil, the load feedback oil passage is connected with the second load-sensing oil passage, when the working oil port A, working oil When the pressure of oil port B exceeds the pressure of the corresponding LS relief valve, the corresponding LS relief valve opens, the pressure of working oil port A and working oil port B continues to rise, and the pressure of the corresponding LS oil circuit no longer follows the increase, resulting in The flow capacity of the compensating spool 3 is reduced, thereby reducing the flow rate of the actuator and playing a role of safety protection. At the same time, LSA and LSB pressure measuring oil ports can be correspondingly provided to measure the pressure of the corresponding LS oil circuit.
以上，可以在阀体预留有工作油口A、工作油口B和P2的测压油道，可实现通过测量工作油口A、工作油口B压力以及P口、P2口压力，采用计算流量控制、计算压力控制的控制算法来控制主油路流量与压力。Above, the pressure measuring oil passages of working oil port A, working oil port B and P2 can be reserved in the valve body, which can be realized by measuring the pressure of working oil port A, working oil port B and the pressure of P port and P2 port. The control algorithm of flow control and calculation pressure control is used to control the flow and pressure of the main oil circuit.
实施例四Embodiment four
如图6所示，在将上述实施例中的主阀芯二2被替换为堵头12、主阀芯一1上开设有LSA油口、LSB油口和负载反馈油道时，供油油路通过LSA油口或者LSB油口连通至负载反馈油道，阀体上开设有第一负载敏感油路和第二负载敏感油路，第一负载敏感油路上设置有第一LS溢流阀6.1，第二负载敏感油路上设置有第二LS溢流阀6.2，当工作油口A出油、工作油 口B回油时，LSA油口通过负载反馈油道与第一负载敏感油路连通；当工作油口B出油、工作油口A回油时，LSB油口通过负载反馈油道与第二负载敏感油路连通；将A、B口中较高压力作为控制油引到补偿阀弹簧腔，补偿阀芯3设置有弹簧，无弹簧腔压力与主阀芯一1进油口压力相同，弹簧腔压力与主阀芯一1出油口压力相同，补偿阀保持主阀芯一1进出油口压差近似恒定，实现传统阀前补偿负载敏感多路阀功能。As shown in Figure 6, when the main spool 2 in the above embodiment is replaced with a plug 12, and the main spool 1 is provided with an LSA oil port, an LSB oil port and a load feedback oil passage, the oil supply oil The oil passage is connected to the load feedback oil passage through the LSA oil port or the LSB oil port. The first load sensing oil passage and the second load sensing oil passage are arranged on the valve body, and the first LS relief valve 6.1 is set on the first load sensing oil passage. , the second LS relief valve 6.2 is set on the second load sensing oil circuit, when oil is discharged from the working oil port A and oil is returned from the working oil port B, the LSA oil port communicates with the first load sensing oil circuit through the load feedback oil channel; When the working oil port B outputs oil and the working oil port A returns oil, the LSB oil port communicates with the second load sensing oil line through the load feedback oil channel; the higher pressure in ports A and B is used as control oil to lead to the spring chamber of the compensation valve , the compensation spool 3 is provided with a spring, the pressure in the unspring chamber is the same as that of the oil inlet of the main spool 1, the pressure of the spring chamber is the same as the pressure of the oil outlet of the main spool 1, and the compensation valve keeps the oil in and out of the main spool 1 The port pressure difference is approximately constant, realizing the function of the traditional pre-valve compensation load-sensing multi-way valve.
本发明的上述工作联应用于阀口独立控制型多路阀中，实现进出油口单独控制。The above-mentioned working couplet of the present invention is applied to a multi-way valve with independent control of the valve port to realize independent control of the oil inlet and outlet.
本发明的上述阀口独立控制型多路阀应用于工程机械，提升整机性能。The above-mentioned multi-way valve with independent valve port control of the present invention is applied to engineering machinery to improve the performance of the whole machine.
与现有技术相比，本发明实施例的工作联、阀口独立控制型多路阀及工程机械的优点在于：该工作联能够实现进、出油口的单独控制，可以采用手动、电液比例控制、CAN总线控制方式。解决传统多路阀进、出油口机械固联的问题，增加控制自由度；解决现有的阀口独立阀控制复杂、控制不稳定的问题，且结构简单、流量控制精度高、成本低，还可通过不同的插件组合，实现阀口独立阀与传统阀前补偿负载敏感多路阀的切换。且在后期随着传感器技术以及控制技术的发展，可以在不改变阀体结构的前提下实现计算流量控制、计算压力控制等的控制方法，再者，将主阀芯二替换为堵头，并改变主阀芯一上的节流口形式，可通过本设计的工作联实现传统结构的阀前补偿负载敏感多路阀的功能，综上，进而提升阀口独立控制型多路阀乃至工程机械的性能。Compared with the prior art, the advantages of the multi-way valve with independent control of the valve port and construction machinery in the embodiment of the present invention are that the working joint can realize the independent control of the oil inlet and outlet, and can use manual, electro-hydraulic Proportional control, CAN bus control mode. Solve the problem of mechanical solid connection between the inlet and outlet ports of traditional multi-way valves, increase the degree of control freedom; solve the problems of complex control and unstable control of existing independent valves at valve ports, and have simple structure, high flow control accuracy, and low cost. It is also possible to switch between the valve port independent valve and the traditional pre-valve compensation load-sensing multi-way valve through different plug-in combinations. And in the later period, with the development of sensor technology and control technology, control methods such as calculated flow control and calculated pressure control can be realized without changing the structure of the valve body. Moreover, the main valve core 2 is replaced with a plug, and By changing the form of the orifice on the main spool one, the function of the pre-valve compensation load-sensitive multi-way valve with the traditional structure can be realized through the working joint of this design. performance.
以上具体实施方式，并不构成对本发明保护范围的限制。本领域技术人员应该明白的是，取决于设计要求和其他因素，可以发生各种各样的修改、组合、子组合和替代。任何在本发明的精神和原则之内所做的修改、等同替换和改进等，均应包含在本发明保护范围之内。The above specific implementation methods are not intended to limit the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

  1. 一种工作联，其特征在于，包括：A work association, characterized in that it comprises:
    阀体，其上开设有供油口P、工作油口A、工作油口B，The valve body is provided with an oil supply port P, a working oil port A, and a working oil port B.
    主阀芯一，能够移动地设置在所述阀体内，用于控制工作油口A出油、工作油口B回油，或者，控制工作油口B出油、工作油口A回油，The main spool 1 is movably arranged in the valve body, and is used to control the oil outlet of working oil port A and the oil return of working oil port B, or control the oil outlet of working oil port B and the oil return of working oil port A,
    主阀芯二，能够移动地设置在所述阀体内，用于控制从供油口P进入该工作联的进油量，The second main valve core is movably arranged in the valve body, and is used to control the amount of oil entering the working union from the oil supply port P,
    先导控制模块，包括用于控制所述主阀芯一移动的第一先导控制单元和用于控制所述主阀芯二移动的第二先导控制单元。The pilot control module includes a first pilot control unit for controlling the movement of the main spool one and a second pilot control unit for controlling the movement of the main spool two.
  2. 如权利要求1所述的工作联，其特征在于，所述阀体上开设有回油口T1、回油口T2、供油油路、工作油路，The working coupling according to claim 1, wherein the valve body is provided with an oil return port T1, an oil return port T2, an oil supply oil circuit, and a working oil circuit,
    所述供油油路从所述供油口P经所述主阀芯二连通至所述主阀芯一所在的位置，The oil supply circuit communicates from the oil supply port P to the position of the main valve core 1 through the main valve core 2,
    所述工作油路包括第一工作油路和第二工作油路，所述第一工作油路形成在所述主阀芯一所在位置至所述工作油口A之间，所述第二工作油路形成在所述主阀芯一所在位置至所述工作油口B之间，The working oil passage includes a first working oil passage and a second working oil passage, the first working oil passage is formed between the position of the main spool one and the working oil port A, and the second working oil passage The oil passage is formed between the position of the main spool one and the working oil port B,
    当所述主阀芯一控制所述工作油口A出油、工作油口B回油时，所述供油油路与所述第一工作油路连通，所述第二工作油路连通至所述回油口T2；当所述主阀芯一控制所述工作油口B出油、工作油口A回油时，所述供油油路与所述第二工作油路连通，所述第一工作油路与所述回油口T1。When the main spool one controls the oil output from the working oil port A and the oil return from the working oil port B, the oil supply oil circuit is connected to the first working oil circuit, and the second working oil circuit is connected to The oil return port T2; when the main spool one controls the oil output from the working oil port B and the oil return from the working oil port A, the oil supply oil circuit communicates with the second working oil circuit, and the The first working oil passage is connected with the oil return port T1.
  3. 如权利要求2所述的工作联，其特征在于，所述第一工作油路中设置有第一端口溢流阀，所述第二工作油路中设置有第二端口溢流阀。The working coupling according to claim 2, wherein a first port relief valve is arranged in the first working oil passage, and a second port relief valve is arranged in the second working oil passage.
  4. 如权利要求1所述的工作联，其特征在于，还包括压差控制模块，其设置在所述供油口P与所述主阀芯二之间，用于控制所述主阀芯二的进油和出油具有恒定的压差。The working coupling according to claim 1, further comprising a differential pressure control module, which is arranged between the oil supply port P and the second main spool, and is used to control the pressure of the second main spool. There is a constant differential pressure between inlet and outlet.
  5. 如权利要求4所述的工作联，其特征在于，所述压差控制模块为补偿阀芯。The working coupling according to claim 4, characterized in that the differential pressure control module is a compensating spool.
  6. 如权利要求1所述的工作联，其特征在于，所述第一先导控制单元具有第一先导控制油路和第二先导控制油路，所述第一先导控制油路和第二先导控制油路分别连通至所述主阀芯一的两个控制腔；所述第二先导控制单元具有第三先导控制油路，所述第三先导控制油路连通至所述主阀芯二的弹簧腔。The working coupling according to claim 1, wherein the first pilot control unit has a first pilot control oil circuit and a second pilot control oil circuit, and the first pilot control oil circuit and the second pilot control oil circuit The channels are connected to the two control chambers of the main valve core one; the second pilot control unit has a third pilot control oil circuit, and the third pilot control oil circuit is connected to the spring chamber of the main valve core two .
  7. 如权利要求6所述的工作联，其特征在于，所述第一先导控制单元包括第一电比例减压阀和第二电比例减压阀，所述第一先导控制油路从所述第一电比例减压阀的出口引出，所述第二先导控制油路从所述第二电比例减压阀的出口引出；所述第二先导控制单元包括第三电比例减压阀，所述第三先导控制油路从所述第三电比例减压阀的出口引出。The working coupling according to claim 6, characterized in that, the first pilot control unit includes a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve, and the first pilot control oil circuit is connected from the first electric proportional pressure reducing valve. The outlet of an electric proportional pressure reducing valve is drawn out, and the second pilot control oil circuit is drawn out from the outlet of the second electric proportional pressure reducing valve; the second pilot control unit includes a third electric proportional pressure reducing valve, and the The third pilot control oil circuit leads out from the outlet of the third electric proportional pressure reducing valve.
  8. 如权利要求6所述的工作联，其特征在于，所述第一先导控制单元包括第一电比例换向阀，所述第一先导控制油路和所述第二先导控制油路分别从所述第一电比例换向阀的两个出口引出；所述第二先导控制单元包括第二电比例换向阀，所述第三先导控制油路从所述第二电比例换向阀的出口引出。The working coupling according to claim 6, wherein the first pilot control unit includes a first electric proportional reversing valve, and the first pilot control oil circuit and the second pilot control oil circuit are separated from the The two outlets of the first electric proportional reversing valve are drawn; the second pilot control unit includes a second electric proportional reversing valve, and the third pilot control oil circuit leads from the outlet of the second electric proportional reversing valve lead out.
  9. 根据权利要求8所述的工作联，其特征在于，还包括控制手柄和用于通过CAN总线接收所述控制手柄的控制信号的控制器，所述控制器根据所述控制信号计算出所述主阀芯一和/或所述主阀芯二的位移量，并通过对应的所述第一电比例换向阀和/或所述第二电比例换向阀控制所述主阀芯一和/或所述主阀芯二移动。The working couplet according to claim 8, further comprising a control handle and a controller for receiving a control signal of the control handle through a CAN bus, and the controller calculates the main handle according to the control signal. spool one and/or the displacement of the main spool two, and control the main spool one and/or through the corresponding first electric proportional reversing valve and/or the second electric proportional reversing valve Or the main spool two moves.
  10. 如权利要求1所述的工作联，其特征在于，所述主阀芯一上开设有LS油口和负载反馈油道，所述供油油路通过所述LS油口连通至所述负载反馈油道，所述阀体上开设有第一负载敏感油路和第二负载敏感油路，所述第一负载敏感油路上设置有第一LS溢流阀，所述第二负载敏感油路上设置有第二LS溢流阀，The working coupling according to claim 1, characterized in that, the main spool is provided with an LS oil port and a load feedback oil passage, and the oil supply oil passage is connected to the load feedback oil passage through the LS oil port. An oil passage, the valve body is provided with a first load sensing oil passage and a second load sensing oil passage, the first load sensing oil passage is provided with a first LS relief valve, and the second load sensing oil passage is provided with There is a second LS relief valve,
    当工作油口A出油、工作油口B回油时，所述负载反馈油道与所述第一负载敏感油路连通；When working oil port A outputs oil and working oil port B returns oil, the load feedback oil passage communicates with the first load sensitive oil passage;
    当工作油口B出油、工作油口A回油时，所述负载反馈油道与所述第二负载敏感油路连通。When the working oil port B outputs oil and the working oil port A returns oil, the load feedback oil passage communicates with the second load sensing oil passage.
  11. 如权利要求10所述的工作联，其特征在于，还包括电控LS溢流阀，所述电控LS溢流阀的进口连通至所述负载反馈油道、所述第一负载敏感油路或第二负载敏感油路。The working couplet according to claim 10, further comprising an electronically controlled LS overflow valve, the inlet of the electronically controlled LS overflow valve is connected to the load feedback oil passage, the first load sensitive oil passage Or the second load sensing oil circuit.
  12. 如权利要求11所述的工作联，其特征在于，所述阀体上开设有第一控制选择油路、第二控制选择油路和第三控制选择油路，所述第一控制选择油路用于连通所述电控LS溢流阀的进口与所述第一负载敏感油路，所述第二控制选择油路用于连通所述电控LS溢流阀的进口与所述第二负载敏感油路，所述第三控制选择油路用于连通所述电控LS溢流阀的进口与所述负载反馈油道。The working coupling according to claim 11, wherein the valve body is provided with a first control selection oil passage, a second control selection oil passage and a third control selection oil passage, and the first control selection oil passage It is used to connect the inlet of the electronically controlled LS relief valve with the first load sensitive oil passage, and the second control selection oil passage is used to connect the inlet of the electronically controlled LS relief valve with the second load Sensitive oil passage, the third control selection oil passage is used to connect the inlet of the electronically controlled LS relief valve with the load feedback oil passage.
  13. 如权利要求1所述的工作联，其特征在于，所述主阀芯二被替换为堵头，所述主阀芯一上开设有LSA油口、LSB油口和负载反馈油道，所述供油油路通过所述LSA油口或者所述LSB油口连通至所述负载反馈油道，所述阀体上开设有第一负载敏感油路和第二负载敏感油路，所述第一负载敏感油路上设置有第一LS溢流阀，所述第二负载敏感油路上设置有第二LS溢流阀，The working union according to claim 1, characterized in that, the second main valve core is replaced by a plug, the first main valve core is provided with an LSA oil port, an LSB oil port and a load feedback oil passage, the The oil supply oil passage is connected to the load feedback oil passage through the LSA oil port or the LSB oil port, and the valve body is provided with a first load sensitive oil passage and a second load sensitive oil passage. A first LS relief valve is provided on the load sensing oil circuit, and a second LS relief valve is provided on the second load sensing oil circuit,
    当工作油口A出油、工作油口B回油时，所述LSA油口通过所述负载反馈油道与所述第一负载敏感油路连通；When working oil port A outputs oil and working oil port B returns oil, the LSA oil port communicates with the first load sensing oil channel through the load feedback oil channel;
    当工作油口B出油、工作油口A回油时，所述LSB油口通过所述负载反馈油道与所述第二负载敏感油路连通。When working oil port B outputs oil and working oil port A returns oil, the LSB oil port communicates with the second load sensing oil channel through the load feedback oil channel.
  14. 一种阀口独立控制型多路阀，其特征在于，包括一个或多个如权利要求1-13中任一项所述的工作联。A multi-way valve with independent valve port control, characterized in that it comprises one or more working couplings according to any one of claims 1-13.
  15. 一种工程机械，其特征在于，包括如权利要求14所述的阀口独立控制型多路阀。A construction machine, characterized by comprising the multi-way valve with independent control of the valve port as claimed in claim 14.
PCT/CN2022/077059 2021-11-23 2022-02-21 Working link, valve port independent control type multi-way valve, and engineering machine WO2023092871A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111396252.7 2021-11-23
CN202111396252.7A CN114165495B (en) 2021-11-23 2021-11-23 Multi-way valve with independently controlled working link and valve port and engineering machinery

Publications (1)

Publication Number Publication Date
WO2023092871A1 true WO2023092871A1 (en) 2023-06-01

Family

ID=80480080

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/077059 WO2023092871A1 (en) 2021-11-23 2022-02-21 Working link, valve port independent control type multi-way valve, and engineering machine

Country Status (2)

Country Link
CN (1) CN114165495B (en)
WO (1) WO2023092871A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115681262B (en) * 2022-10-27 2023-06-20 华东交通大学 Load-sensitive electrohydraulic conversion oil inlet module

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105840574A (en) * 2015-01-16 2016-08-10 徐工集团工程机械股份有限公司 Load-sensitive multi-way valve and hydraulic system of engineering machine
CN106762916A (en) * 2017-02-28 2017-05-31 徐工集团工程机械有限公司 Work connection, load sensing multi-way valve and engineering machinery
CN108252979A (en) * 2018-03-19 2018-07-06 徐工集团工程机械有限公司 Hydraulic control valve and hydraulic system
CN109441905A (en) * 2018-12-26 2019-03-08 太原理工大学 A kind of transformation difference load sensing multi-way valve
US20200386245A1 (en) * 2018-02-12 2020-12-10 Parker-Hannifin Corporation Hydraulic Control Valve Configured to Use a Pilot Signal as a Substitute Load-Sense Signal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353289A (en) * 1980-05-29 1982-10-12 Sperry Corporation Power transmission
CN102506030B (en) * 2011-09-26 2014-11-19 三一重型装备有限公司 Multi-way valve and tunnel boring machine
CN109707688B (en) * 2018-12-29 2020-08-18 中国煤炭科工集团太原研究院有限公司 Flow anti-saturation load sensitive multi-way valve with front pressure compensator
CN113931892B (en) * 2021-09-28 2022-06-14 中联重科股份有限公司 Load-sensitive multi-way valve with independently controlled load port and hydraulic system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105840574A (en) * 2015-01-16 2016-08-10 徐工集团工程机械股份有限公司 Load-sensitive multi-way valve and hydraulic system of engineering machine
CN106762916A (en) * 2017-02-28 2017-05-31 徐工集团工程机械有限公司 Work connection, load sensing multi-way valve and engineering machinery
US20200386245A1 (en) * 2018-02-12 2020-12-10 Parker-Hannifin Corporation Hydraulic Control Valve Configured to Use a Pilot Signal as a Substitute Load-Sense Signal
CN108252979A (en) * 2018-03-19 2018-07-06 徐工集团工程机械有限公司 Hydraulic control valve and hydraulic system
CN109441905A (en) * 2018-12-26 2019-03-08 太原理工大学 A kind of transformation difference load sensing multi-way valve

Also Published As

Publication number Publication date
CN114165495B (en) 2022-10-18
CN114165495A (en) 2022-03-11

Similar Documents

Publication Publication Date Title
CN109441905B (en) Variable pressure difference load sensitive multi-way valve
US20120224983A1 (en) Multi-way valve, hydraulic device and concrete pump vehicle
US5161373A (en) Hydraulic control valve system
CN105545852B (en) High-speed switch pilot proportioning valve
CN109882462B (en) Hydraulic control proportion and load sensitivity fusion variable pump and hydraulic control intelligent flow distribution system
WO2023092871A1 (en) Working link, valve port independent control type multi-way valve, and engineering machine
KR850001244B1 (en) Flushing valve system in closed circuit hydrostatic power transmission
CN101608692A (en) Hand, electricity, hydraulic three-function Y-shaped constant-pressure flow regulating valve with multiple spray holes
CN201448443U (en) Manual, electric and hydraulic three-way Y-shaped multi-spout pressure stabilizing and flow regulating valve
CN113915185B (en) Load port independent control load sensitive multi-way valve and hydraulic system
CN109826836B (en) Intelligent variable pump and hydraulic control system
CN108716491B (en) Three-position five-way load port independent control multi-way valve with O-shaped neutral position function
CN115370633A (en) Fork truck and integrated hydraulic control system thereof
CN205559384U (en) Two system control module of hydraulic pressure
CN113431127B (en) Main control valve, constant-variable hydraulic system and loader
CN109881734B (en) Work union, multi-way valve and excavator
CN109798272B (en) Compound variable pump and compound hydraulic control system
CN203822733U (en) Full load sensitive multitandem valve used for caterpillar crane
CN113931892B (en) Load-sensitive multi-way valve with independently controlled load port and hydraulic system
CN113931893A (en) Load-sensitive multi-way valve with independently controlled load port and hydraulic system
CN111396391B (en) High-precision large-flow multi-way valve with disturbance compensation
CN113931896A (en) Load port independent control load sensitive multi-way valve and hydraulic system
CN114109941B (en) Integrated multifunctional hydraulic valve oil inlet linkage assembly and hydraulic valve
CN115681262B (en) Load-sensitive electrohydraulic conversion oil inlet module
CN217947588U (en) Integrated hydraulic control system for forklift

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22896974

Country of ref document: EP

Kind code of ref document: A1

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112024009983

Country of ref document: BR

WWE Wipo information: entry into national phase

Ref document number: 2022896974

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022896974

Country of ref document: EP

Effective date: 20240624