CN106351899B - Auxiliary hydraulic system and pumping machine - Google Patents
Auxiliary hydraulic system and pumping machine Download PDFInfo
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- CN106351899B CN106351899B CN201611039903.6A CN201611039903A CN106351899B CN 106351899 B CN106351899 B CN 106351899B CN 201611039903 A CN201611039903 A CN 201611039903A CN 106351899 B CN106351899 B CN 106351899B
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- valve
- oil
- pressure
- prefill
- oil inlet
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Classifications
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides a kind of auxiliary hydraulic system and pumping machine, wherein, auxiliary hydraulic system includes：Fuel tank, hydraulic pump, prefill valve, accumulator, main hydraulic work device and auxiliary hydraulic work device, first actuator port of prefill valve is connected with the oil inlet of the oil inlet and outlet of accumulator, main hydraulic work device, and the second actuator port of prefill valve is connected with the oil inlet of auxiliary hydraulic work device；Prefill valve is used for the conducting flow that the break-make of the oil inlet of prefill valve and the second actuator port of prefill valve or/and the second actuator port of prefill valve are controlled according to the outlet pressure of the first actuator port.This programme is integrated by the accumulator pressurizing circuit in auxiliary hydraulic system and the hydraulic circuit of auxiliary hydraulic work device, it is two circuit supplies hydraulic oil by a hydraulic pump, distributes hydraulic oil by prefill valve to work for accumulator pressurizing or the auxiliary hydraulic work device of driving.Reduce the number of elements of auxiliary liquid system pressure, simplify system structure, reduce cost.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, is related to a kind of auxiliary hydraulic system and one kind is auxiliary with this
Help the pumping machine of hydraulic system.
Background technology
Its auxiliary hydraulic system of concrete pumping equipment generally includes accumulator pressurizing circuit and stirring loop etc. at present, stores
Energy device pressurising circuit is independent with stirring loop, and accumulator pressurizing circuit conveys hydraulic oil by storage pump, passes through accumulator
The valve group control accumulator pressurizing/off-load in pressurising circuit and control loop pressure, stirring loop convey hydraulic oil by mixing pump,
By the pressure valve control loop pressure of stirring loop, cause entirely to aid in that liquid system pressure number of elements is more, and of high cost, structure is multiple
Miscellaneous, reliability is not high.
The content of the invention
Present invention seek to address that at least one technical problem existing in the prior art.
For this reason, it is an advantage of the invention to provide a kind of auxiliary hydraulic system.
It is a further object of the invention to provide a kind of pumping machine, including above-mentioned auxiliary hydraulic system.
To achieve the above object, the embodiment of the first aspect of the present invention provides a kind of auxiliary hydraulic system, including：Oil
Case, hydraulic pump, prefill valve, accumulator, main hydraulic work device and auxiliary hydraulic work device, oil inlet and the oil of the hydraulic pump
Case connects, and the oil outlet of the hydraulic pump connects with the oil inlet of the prefill valve, the first actuator port of the prefill valve and
The oil inlet connection of the oil inlet and outlet of the accumulator, the main hydraulic work device, the second actuator port of the prefill valve
Connected with the oil inlet of the auxiliary hydraulic work device；Wherein, the prefill valve is used for going out according to first actuator port
The break-make or/and the prefill valve of the oil inlet of the mouth pressure control prefill valve and the second actuator port of the prefill valve
The conducting flow of second actuator port.
This programme integrates the accumulator pressurizing circuit in auxiliary hydraulic system and the hydraulic circuit of auxiliary hydraulic work device
One, be two circuit supplies hydraulic oil by a hydraulic pump, by prefill valve distribution hydraulic oil with for accumulator pressurizing or
Auxiliary hydraulic work device is driven to work.Reduce the number of elements of auxiliary liquid system pressure, simplify system structure, reduce into
This.
In the above embodiment, it is preferable that the main hydraulic work device can be other works such as an oil cylinder or motor
Make device, this sentences oil cylinder and is illustrated, at this time, the first actuator port of the prefill valve and the main hydraulic work device it
Between be provided with oil cylinder reversal valve, the main hydraulic work device includes left oil cylinder and right oil cylinder, and the auxiliary hydraulic work device is
Stirring motor；The first actuator port and the second actuator port of the oil cylinder reversal valve respectively with the oil inlet of the left oil cylinder and
The oil inlet connection of the right oil cylinder, the oil outlet of the left oil cylinder, the oil outlet of the right oil cylinder, the stirring motor go out
The oil return opening of hydraulic fluid port, the oil return opening of the prefill valve and the oil cylinder reversal valve is connected with the fuel tank, and the oil cylinder commutates
The oil inlet of valve is connected with the first actuator port of the accumulator and the prefill valve.
This programme is integrated by the accumulator pressurizing circuit in auxiliary hydraulic system and stirring loop, passes through a hydraulic pressure
Pump as two circuit supplies hydraulic oil, distribute hydraulic oil by prefill valve to work for accumulator pressurizing or driving stirring motor.
So design reduces the number of elements of auxiliary liquid system pressure, simplifies system structure, reduces cost.And pass through prefill valve point
Equipped hydraulic oil, system hydraulic pressure directly control the spool position of prefill valve, are moved towards with control system oil circuit, realize accumulator reality
Shi Zidong pressurisings, whole process fast response time, no spill losses can reduce the demand to engine power, good energy-conserving effect,
And compression shock caused during accumulator conversion work state can be reduced.
Specifically, when the pressure of the first actuator port is smaller, hydraulic pump is to the first actuator port fuel feeding, when the first work
The pressure rise of hydraulic fluid port to a certain extent, by controlling prefill valve import to be turned on the second actuator port of prefill valve, the second work
It is fuel-displaced to make hydraulic fluid port.When the pressure of accumulator is less than the upper limit value that prefill valve is set, the oil inlet of prefill valve and its first working oil
Mouth connection, is accumulator pressurizing；When the pressure of accumulator reaches the upper limit value of prefill valve setting, prefill valve transposition, makes prefill valve
Oil inlet connected with its second actuator port, driving stirring motor work；Accumulator is left and right oil cylinder by oil cylinder reversal valve
Fuel feeding, drives left and right cylinder efficient, and when the pressure of accumulator reaches the lower limit of setting, the spool transposition of prefill valve, makes filling liquid
The oil inlet of valve is connected with its first actuator port, is again accumulator pressurizing.
Wherein it is preferred to the hydraulic pump is gear pump.
In any of the above-described technical solution, it is preferable that the oil cylinder reversal valve includes auxiliary selenoid reversal valve and surge to change
To valve, the oil inlet of the auxiliary selenoid reversal valve is connected by first throttle valve with the first actuator port of the prefill valve,
Two control terminals of two actuator ports of the auxiliary selenoid reversal valve respectively with the spool control chamber of the hydraulic directional valve connect,
The oil inlet of the hydraulic directional valve is connected with the first actuator port of the prefill valve and the accumulator, the commutation of surging
Two actuator ports of valve are connected with the oil inlet of the left oil cylinder and the oil inlet of the right oil cylinder respectively, and the auxiliary selenoid changes
The oil return opening of oil return opening and the hydraulic directional valve to valve is connected with the fuel tank respectively.
In the present solution, the hydraulic oil of the first actuator port outflow of prefill valve, a hydraulic oil flow to auxiliary selenoid commutation
The oil inlet of valve, another part hydraulic oil flow to the oil inlet of hydraulic directional valve.First throttle valve is used to reduce to prefill valve
Impact of the hydraulic oil of first actuator port to auxiliary selenoid reversal valve, two actuator ports of auxiliary selenoid reversal valve respectively with liquid
The two control terminals connection of the spool control chamber of dynamic reversal valve, auxiliary selenoid reversal valve are used for the spool position for controlling hydraulic directional valve
Put.The oil inlet of hydraulic directional valve is connected with accumulator, two actuator ports respectively with the oil inlet of left oil cylinder and right oil cylinder into
Hydraulic fluid port connects, and for controlling left oil cylinder and right cylinder efficient, accumulator is used for the input pressure for ensureing oil cylinder.
Wherein, alternatively, auxiliary selenoid reversal valve and hydraulic directional valve are three-position four-way valve.
In any of the above-described technical solution, alternatively, the oil cylinder reversal valve includes oil cylinder solenoid directional control valve, the oil cylinder
The oil inlet of solenoid directional control valve is connected with the first actuator port of the prefill valve and the accumulator, the oil cylinder electromagnetic switch
Two actuator ports of valve are connected with the oil inlet of the left oil cylinder and the oil inlet of the right oil cylinder respectively, oil cylinder solenoid directional control valve
Oil return opening connected with the fuel tank.
This programme is commutated by oil cylinder solenoid directional control valve to change the working status of left oil cylinder and right oil cylinder.
Wherein, alternatively, oil cylinder solenoid directional control valve is three-position four-way valve.
According to one embodiment of present invention, the prefill valve includes pressure-compensated valve and check valve, the prefill valve
The oil inlet with the pressure-compensated valve, the oil inlet of the check valve connect oil inlet respectively, and the pressure-compensated valve goes out
Hydraulic fluid port is connected with the second actuator port of the prefill valve, the first working oil of the oil outlet of the check valve and the prefill valve
Mouth connection；The prefill valve is used for the break-make that the pressure-compensated valve is controlled according to the outlet pressure of first actuator port
Or/and conducting flow.
In the above-mentioned technical solutions, it is preferable that the prefill valve further includes pressure shut-off valve or other can be according to the first work
Make the valve body of the pressure conducting control oil circuit of hydraulic fluid port, the first control chamber of the pressure-compensated valve, the pressure shut-off valve into
Hydraulic fluid port is connected with the oil inlet of the prefill valve, and the second control chamber of the pressure-compensated valve is fuel-displaced with the pressure shut-off valve
Mouth connection, and the second control chamber of the pressure-compensated valve is equipped with recuperation valve commutation spring, the first control of the pressure shut-off valve
Chamber processed is equipped with stop valve pressure spring, and the oil return opening of the pressure shut-off valve is connected with the oil return opening of the prefill valve, the list
Second control chamber of oil outlet and the pressure shut-off valve to valve connects.
In the present solution, into the part in the hydraulic oil of prefill valve oil inlet by pressure-compensated valve the first control terminal into
Enter its spool control chamber, the part flowed out in the hydraulic oil of check valve enters its spool by the second control terminal of pressure shut-off valve
Control chamber, the pressure set points of pressure shut-off valve are the upper limit value of prefill valve.The pressure of accumulator is set less than pressure shut-off valve
During definite value, under the collective effect of pressure shut-off valve pressure spring and its spool control chamber oil pressure, the oil inlet of pressure shut-off valve
Connected with its oil outlet, the hydraulic oil into pressure shut-off valve oil inlet enters its spool by the second control terminal of pressure-compensated valve
Control chamber, under the collective effect of pressure-compensated valve commutation spring and its spool control chamber oil pressure, the oil inlet of pressure-compensated valve
Disconnected with its oil outlet, the oil inlet of prefill valve is connected with its first actuator port, so as to be accumulator pressurizing；Accumulator
When pressure reaches the setting value of pressure shut-off valve, in the collective effect of pressure shut-off valve pressure spring and its spool control chamber oil pressure
Under, the oil return opening of pressure shut-off valve is connected with its oil outlet, and the first control chamber of pressure-compensated valve passes through pressure shut-off valve and fuel tank
Connection, the hydraulic oil of pressure compensation valve core the first control terminal of control chamber flow into fuel tank, pressure-compensated valve commutate spring and its
Under the collective effect of spool control chamber oil pressure, the oil inlet of pressure-compensated valve is connected with its oil outlet, makes the oil inlet of prefill valve
Connected with its second actuator port, so as to drive stirring motor to work；Accumulator is supplied by oil cylinder reversal valve for left and right oil cylinder
Oil, when its pressure reaches the lower limit of setting, pressure shut-off valve is made in its resetting spring and its common of spool control chamber oil pressure
With lower commutation, its oil inlet is connected with its oil outlet, exist again for pressure-compensated valve the second control chamber fuel feeding, pressure-compensated valve
Go off state under the collective effect of its resetting spring and its spool control chamber oil pressure, make the oil inlet of prefill valve again with its
First actuator port connects, so as to be accumulator pressurizing again.
In any of the above-described technical solution, it is preferable that the second control chamber of the pressure shut-off valve includes the first seed oil mouth
With the second seed oil mouth, the oil outlet of the check valve is connected with the first seed oil mouth, the oil outlet of the pressure shut-off valve with
Second control chamber of the second seed oil mouth and the pressure-compensated valve connects.
In the present solution, the oil outlet of pressure shut-off valve is connected with the second control chamber of pressure-compensated valve, by pressure shut-off valve
Oil outlet outflow hydraulic oil in a part its spool control chamber is entered by the second seed oil mouth of the first control terminal, with its valve
The hydraulic oil and its resetting spring that other entrances of core control chamber flow into coordinate, to control the position of its spool.
In any of the above-described technical solution, it is preferable that the prefill valve further includes second throttle, the second throttle
Oil inlet be connected with the first control chamber of the pressure-compensated valve, the oil outlet of the second throttle and the check valve
Oil inlet and the pressure shut-off valve oil inlet connection.
In the present solution, the hydraulic oil that second throttle flows into prefill valve oil inlet throttles, for controlling flow direction single
To the oil mass of valve and pressure shut-off valve, so that into the part in the hydraulic oil of prefill valve oil inlet by the of pressure-compensated valve
One control terminal enters its spool control chamber.
In any of the above-described technical solution, it is preferable that the pressure-compensated valve includes hydraulic pilot formula 2/2-way ratio
Control valve；The pressure shut-off valve includes hydraulic pilot formula two-bit triplet reversal valve.
According to one embodiment of present invention, the prefill valve includes electric control reversing valve, check valve and control unit, described
The oil inlet with the electric control reversing valve, the oil inlet of the check valve connect the oil inlet of prefill valve respectively, described automatically controlled to change
Second actuator port of oil outlet and the prefill valve to valve connects, and the of the oil outlet of the check valve and the prefill valve
One actuator port connects；First actuator port of the prefill valve is connected with pressure detecting element, described control unit with it is described
Pressure detecting element and electric control reversing valve connection, the pressure for being detected according to the pressure detecting element control the electricity
Control reversal valve commutation.
In any of the above-described technical solution, it is preferable that the auxiliary hydraulic system further includes off-load reversal valve, the filling liquid
Second actuator port of valve can pass through the oil inlet or the fuel tank of the off-load reversal valve and the auxiliary hydraulic work device
Connection.
In the present solution, two-bit triplet solenoid valve, the oil inlet and filling liquid of two-bit triplet solenoid valve can be selected in off-load reversal valve
The second actuator port connection of valve, the first oil outlet of two-bit triplet solenoid valve is connected with the oil inlet of stirring motor, second goes out
Hydraulic fluid port is connected with fuel tank.When needing to be stirred work, the oil inlet of two-bit triplet solenoid valve is connected with its first oil outlet,
So that the oil outlet of hydraulic pump is connected by prefill valve and two-bit triplet solenoid valve with the oil inlet of stirring motor, so as to stir horse
Up to work.When needing to carry out off-load to the hydraulic oil of hydraulic pump conveying, the oil inlet of two-bit triplet solenoid valve second goes out with it
Hydraulic fluid port connects, so that the oil outlet of hydraulic pump is connected by prefill valve and two-bit triplet solenoid valve with fuel tank.
In any of the above-described technical solution, it is preferable that the auxiliary hydraulic system further includes overflow valve, the overflow valve
Oil inlet is connected with the oil outlet of hydraulic pump, and the oil outlet of the overflow valve is connected with the fuel tank.
In the prior art, the accumulator pressurizing circuit in auxiliary hydraulic system and stirring loop are independent, and accumulator fills
Pushing back road and stirring loop respectively needs the pressure of an overflow valve control loop.And this programme is by the accumulation of energy in auxiliary hydraulic system
Device pressurising circuit and stirring loop are integrated, by an overflow valve control system pressure, can so save one and overflow
Valve is flowed, so as to reduce the cost of product.
The embodiment of second aspect of the present invention provides a kind of pumping machine, including such as any implementation of first aspect present invention
The auxiliary hydraulic system that example provides.
The pumping machine that second aspect of the present invention embodiment provides includes what first aspect present invention any embodiment provided
Auxiliary hydraulic system, thus the pumping machine have any of the above-described embodiment provide auxiliary hydraulic system all beneficial to imitate
Fruit, details are not described herein.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention
Recognize.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structure diagram for the auxiliary hydraulic system that one embodiment of the invention provides.
Wherein, the correspondence between the reference numeral in Fig. 1 and component names is：
1 fuel tank, 2 hydraulic pumps, 3 prefill valves, 31 pressure-compensated valves, 32 check valves, 33 pressure shut-off valves, 34 second throttlings
Valve, 4 accumulators, 5 stirring motors, 6 oil cylinder reversal valves, 61 auxiliary selenoid reversal valves, 62 hydraulic directional valves, 7 left oil cylinders, 8 right oil
Cylinder, 9 overflow valves, 10 first throttle valves.
Embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
By using other different from implementing in a manner of described here, therefore, protection scope of the present invention and from following public tool
The limitation of body embodiment.
As shown in Figure 1, the embodiment of the first aspect of the present invention provides a kind of auxiliary hydraulic system, including：Including：Oil
Case 1, hydraulic pump 2, prefill valve 3, accumulator 4, main hydraulic work device and auxiliary hydraulic work device, the oil inlet of the hydraulic pump 2
Mouth is connected with fuel tank 1, and the oil outlet of the hydraulic pump 2 is connected with the oil inlet of the prefill valve 3, and the first of the prefill valve 3
Actuator port is connected with the oil inlet and outlet of the accumulator 4, the oil inlet of the main hydraulic work device, the prefill valve 3
Second actuator port is connected with the oil inlet of the auxiliary hydraulic work device；Wherein, the prefill valve 3 is used for according to described first
The outlet pressure of actuator port control the oil inlet of the prefill valve 3 and the second actuator port of the prefill valve 3 break-make or/
With the conducting flow of the second actuator port of the prefill valve 3.
This programme integrates the accumulator pressurizing circuit in auxiliary hydraulic system and the hydraulic circuit of auxiliary hydraulic work device
One, be two circuit supplies hydraulic oil by a hydraulic pump, by prefill valve distribution hydraulic oil with for accumulator pressurizing or
Auxiliary hydraulic work device is driven to work.When the outlet pressure (i.e. the setting pressure of accumulator 4) of the first actuator port of prefill valve 3
Less than setting pressure when, hydraulic pump 2 by prefill valve 3 to the first actuator port fuel feeding, when the pressure of the first actuator port is more than
When setting pressure, prefill valve commutation, while to the first actuator port and the second actuator port fuel feeding, or only to the second actuator port
Fuel feeding, or change the conducting flow of the second actuator port, so that the pressurising to accumulator 4 is reduced or disconnects, easy to control, letter
Single, system stability is good, meanwhile, reduce the number of elements of auxiliary liquid system pressure, simplify system structure, reduce cost.
And hydraulic oil is distributed by prefill valve, system hydraulic pressure is directly controlled the spool position of prefill valve, is walked with control system oil circuit
To realizing accumulator automatic pressurising in real time, whole process fast response time, no spill losses, can reduce to engine power
Demand, good energy-conserving effect, and compression shock caused during accumulator conversion work state can be reduced.
In the above embodiment, it is preferable that the main hydraulic work device can be other works such as an oil cylinder or motor
Make device, this sentences oil cylinder and is illustrated, at this time, the first actuator port of the prefill valve 3 and the main hydraulic work device
Between be provided with oil cylinder reversal valve 6, the main hydraulic work device includes left oil cylinder 7 and right oil cylinder 8, the auxiliary hydraulic dress
It is set to stirring motor 5；The first actuator port and the second actuator port of the oil cylinder reversal valve 6 respectively with the left oil cylinder 7
Oil inlet is connected with the oil inlet of the right oil cylinder 8, the oil outlet of the left oil cylinder 7, the oil outlet, described of the right oil cylinder 8
The oil return opening of the oil outlet of stirring motor 5, the oil return opening of the prefill valve 3 and the oil cylinder reversal valve 6 respectively with the fuel tank 1
Connection, and the oil inlet of the oil cylinder reversal valve 6 is connected with the first actuator port of the accumulator 4 and the prefill valve 3.
This programme is integrated by the 4 pressurising circuit of accumulator in auxiliary hydraulic system and stirring loop, passes through a liquid
Press pump 2 is two circuit supplies hydraulic oil, and hydraulic oil is distributed with for 4 pressurising of accumulator or driving stirring horse by prefill valve 3
Up to 5 work.So design reduces the number of elements of auxiliary liquid system pressure, simplifies system structure, reduces cost.And pass through
Prefill valve 3 distributes hydraulic oil, and system hydraulic pressure directly controls the spool position of prefill valve 3, is moved towards with control system oil circuit, real
The existing automatic pressurising in real time of accumulator 4, whole process fast response time, no spill losses, can reduce the demand to engine power,
Good energy-conserving effect, and compression shock caused during 4 conversion work state of accumulator can be reduced.
Specifically, the pressure of accumulator 4 less than prefill valve 3 set upper limit value when, the oil inlet of prefill valve 3 with its first
Actuator port connects, and is 4 pressurising of accumulator；When the pressure of accumulator 4 reaches the upper limit value that prefill valve 3 is set, prefill valve 3 changes
Position, makes the oil inlet of prefill valve 3 be connected with its second actuator port, and driving stirring motor 5 works；Accumulator 4 is changed by oil cylinder
It is left and right 8 fuel feeding of oil cylinder to valve 6, drives left and right oil cylinder 8 to work, when the pressure of accumulator 4 reaches the lower limit of setting, filling liquid
The spool transposition of valve 3, makes the oil inlet of prefill valve 3 be connected with its first actuator port, is again 4 pressurising of accumulator.
Wherein it is preferred to the hydraulic pump 2 is gear pump.
To realize that " prefill valve 3 is used to control the prefill valve 3 according to the outlet pressure of first actuator port
The conducting stream of the break-make of second actuator port of oil inlet and the prefill valve 3 or/and the second actuator port of the prefill valve 3
Amount ", prefill valve can have multiple choices, according to a preferred embodiment of the present invention in, the prefill valve 3 includes pressure compensation
Valve 31 and check valve 32, the oil inlet of the prefill valve 3 oil inlet with the pressure-compensated valve 31, the check valve respectively
Oil inlet connects, and the oil outlet of the pressure-compensated valve 31 is connected with the second actuator port of the prefill valve, the check valve
32 oil outlet is connected with the first actuator port of the prefill valve 3；The prefill valve 3 is used for according to first actuator port
Outlet pressure control the break-make or/and conducting flow of the pressure-compensated valve 31.
In the above-mentioned technical solutions, it is preferable that the prefill valve 3 further includes pressure shut-off valve 33 or other can be according to first
The valve body of the pressure conducting control oil circuit of actuator port, the first control chamber of the pressure-compensated valve 31, the pressure shut-off valve
33 oil inlet is connected with the oil inlet of the prefill valve 3, and the second control chamber and the pressure of the pressure-compensated valve 31 are cut
The oil outlet connection of disconnected valve 33, and the second control chamber of the pressure-compensated valve 31 is equipped with recuperation valve commutation spring, the pressure
First control chamber of stop valve 33 is equipped with stop valve pressure spring, the oil return opening of the pressure shut-off valve 33 and the prefill valve 3
Oil return opening connection, the oil outlet of the check valve 32 connects with the second control chamber of the pressure shut-off valve 33.
In the present solution, into the part in the hydraulic oil of 3 oil inlet of prefill valve by the first control of pressure-compensated valve 31
End enters its spool control chamber, the part in the hydraulic oil of outflow check valve 32 by pressure shut-off valve 33 the second control terminal into
Enter its spool control chamber, the pressure set points of pressure shut-off valve 33 are the upper limit value of prefill valve 3.The pressure of accumulator 4 is less than pressure
During the setting value of power stop valve 33, under the collective effect of 33 resetting spring of pressure shut-off valve and its spool control chamber oil pressure, pressure
The oil inlet of power stop valve 33 is connected with its oil outlet, into 33 oil inlet of pressure shut-off valve hydraulic oil by pressure-compensated valve 31
The second control terminal enter its spool control chamber, common in 31 resetting spring of pressure-compensated valve and its spool control chamber oil pressure makees
Under, the oil inlet of pressure-compensated valve 31 is disconnected with its oil outlet, and the oil inlet and its first actuator port for making prefill valve 3 connect
It is logical, so as to be 4 pressurising of accumulator；It is multiple in pressure shut-off valve 33 when the pressure of accumulator 4 reaches the setting value of pressure shut-off valve 33
Under the collective effect of position spring and its spool control chamber oil pressure, the oil return opening of pressure shut-off valve 33 is connected with its oil outlet, pressure
31 first control chamber of recuperation valve is connected by pressure shut-off valve 33 with fuel tank 1, and 31 spool control chamber first of pressure-compensated valve controls
The hydraulic oil at end flows into fuel tank 1, under the collective effect of 31 resetting spring of pressure-compensated valve and its spool control chamber oil pressure, pressure
The oil inlet of recuperation valve 31 is connected with its oil outlet, the oil inlet of prefill valve 3 is connected with its second actuator port, so as to drive
Stirring motor 5 works；Accumulator 4 is left and right 8 fuel feeding of oil cylinder by oil cylinder reversal valve 6, its pressure reaches the lower limit of setting
When, pressure shut-off valve 33 commutates under the collective effect of its resetting spring and its spool control chamber oil pressure, makes its oil inlet and its
Oil outlet connects, and is again 31 second control chamber fuel feeding of pressure-compensated valve, pressure-compensated valve 31 is in its resetting spring and its spool
State is gone off under the collective effect of control chamber oil pressure, the oil inlet of prefill valve 3 is connected again with its first actuator port,
So as to be again 4 pressurising of accumulator.
In any of the above-described technical solution, it is preferable that the second control chamber of the pressure shut-off valve 33 includes the first seed oil
Mouth and the second seed oil mouth, the oil outlet of the check valve 32 are connected with the first seed oil mouth, and the pressure shut-off valve 33 goes out
Hydraulic fluid port is connected with the second control chamber of the second seed oil mouth and the pressure-compensated valve 31.
In the present solution, the oil outlet of pressure shut-off valve 33 is connected with the second control chamber of pressure-compensated valve 31, cut by pressure
A part in the hydraulic oil of the oil outlet outflow of disconnected valve 33 enters its spool control chamber by the second seed oil mouth of the first control terminal,
Coordinate with the hydraulic oil and its resetting spring of its spool control chamber other entrances inflow, to control the position of its spool.
In any of the above-described technical solution, it is preferable that the prefill valve 3 further includes second throttle 34, second section
Stream valve 34 oil inlet be connected with the first control chamber of the pressure-compensated valve 31, the oil outlet of the second throttle 34 and
The oil inlet connection of the oil inlet and the pressure shut-off valve 33 of the check valve 32.
In the present solution, the hydraulic oil that second throttle 34 flows into 3 oil inlet of prefill valve throttles, flowed to for controlling
The oil mass of check valve 32 and pressure shut-off valve 33, so as to be mended into the part in the hydraulic oil of 3 oil inlet of prefill valve by pressure
The first control terminal for repaying valve 31 enters its spool control chamber.
In any of the above-described technical solution, it is preferable that the pressure-compensated valve 31 includes hydraulic pilot formula 2/2-way ratio
Example control valve；The pressure shut-off valve 33 includes hydraulic pilot formula two-bit triplet reversal valve.
In another preferred embodiment according to the present invention, the prefill valve includes electric control reversing valve, check valve and control
Unit processed, the oil inlet with the electric control reversing valve, the oil inlet of the check valve connect the oil inlet of the prefill valve respectively,
The oil outlet of the electric control reversing valve is connected with the second actuator port of the prefill valve, the oil outlet of the check valve with it is described
The first actuator port connection of prefill valve；First actuator port of the prefill valve is connected with pressure detecting element, the control
Unit is connected with the pressure detecting element and the electric control reversing valve, for the pressure detected according to the pressure detecting element
The electric control reversing valve is controlled to commutate.
In any of the above-described technical solution, it is preferable that the auxiliary hydraulic system further includes off-load reversal valve, the filling liquid
Second actuator port of valve 3 can by the off-load reversal valve and the auxiliary hydraulic work device (i.e. stirring motor 5) into
Hydraulic fluid port or the fuel tank 1 connect.
In the present solution, two-bit triplet solenoid valve, the oil inlet and filling liquid of two-bit triplet solenoid valve can be selected in off-load reversal valve
The second actuator port connection of valve 3, the first oil outlet of two-bit triplet solenoid valve is connected with the oil inlet of stirring motor 5, second
Oil outlet is connected with fuel tank 1.When needing to be stirred work, the oil inlet of two-bit triplet solenoid valve connects with its first oil outlet
It is logical, so that the oil outlet of hydraulic pump 2 is connected by prefill valve 3 and two-bit triplet solenoid valve with the oil inlet of stirring motor 5, so that
Stirring motor 5 works.When need to hydraulic pump 2 convey hydraulic oil carry out off-load when, the oil inlet of two-bit triplet solenoid valve with
Its second oil outlet connects, so that the oil outlet of hydraulic pump 2 is connected by prefill valve 3 and two-bit triplet solenoid valve with fuel tank 1.
In any of the above-described technical solution, it is preferable that the auxiliary hydraulic system further includes overflow valve 9, the overflow valve 9
Oil inlet connected with the oil outlet of hydraulic pump 2, the oil outlet of the overflow valve 9 is connected with the fuel tank 1.
In the prior art, the accumulator pressurizing circuit in auxiliary hydraulic system and stirring loop are independent, and accumulator fills
Pushing back road and stirring loop respectively needs the pressure of an overflow valve control loop.And this programme is by the accumulation of energy in auxiliary hydraulic system
4 pressurising circuit of device and stirring loop are integrated, by a 9 control system pressure of overflow valve, can so save one
Overflow valve 9, so as to reduce the cost of product.
Wherein, the designing scheme of the oil cylinder reversal valve 6 includes numerous embodiments：
Embodiment one：
As described in Figure 1, the oil cylinder reversal valve 6 includes auxiliary selenoid reversal valve 61 and hydraulic directional valve 62, the auxiliary
Solenoid directional control valve 61 and the hydraulic directional valve 62 are three-position four-way valve, the oil inlet of the auxiliary selenoid reversal valve 61 and
The oil outlet connection of one throttle valve 10, the first actuator port of the oil inlet of the first throttle valve 10 and the prefill valve 3 and
The accumulator 4 connects, two actuator ports of the auxiliary selenoid reversal valve 61 spool with the hydraulic directional valve 62 respectively
The two control terminals connection of control chamber, first actuator port and institute of the oil inlet of the hydraulic directional valve 62 with the prefill valve 3
State accumulator 4 to connect, two actuator ports of the hydraulic directional valve 62 oil inlet with the left oil cylinder 7 and the right oil respectively
The oil inlet connection of cylinder 8, the oil return opening of the auxiliary selenoid reversal valve 61 and the oil return opening of the hydraulic directional valve 62 respectively with
The fuel tank 1 connects.
In the present solution, the hydraulic oil of the first actuator port outflow of prefill valve 3, a hydraulic oil flow to auxiliary selenoid commutation
The oil inlet of valve 61, another part hydraulic oil flow to the oil inlet of hydraulic directional valve 62.First throttle valve is used to reduce to filling liquid
Impact of the hydraulic oil of first actuator port of valve to auxiliary selenoid reversal valve, two actuator ports point of auxiliary selenoid reversal valve 61
Two control terminals not with the spool control chamber of hydraulic directional valve 62 connect, and auxiliary selenoid reversal valve 61 is used to control hydraulic directional valve
62 spool position.The oil inlet of hydraulic directional valve 62 is connected with accumulator 4, the oil inlet with left oil cylinder 7 respectively of two actuator ports
Mouth is connected with the oil inlet of right oil cylinder 8, and for controlling left oil cylinder 7 and right oil cylinder 8 to work, accumulator is used for the oil inlet for ensureing oil cylinder
Pressure.
Embodiment two：(not shown)
The oil cylinder reversal valve includes oil cylinder solenoid directional control valve, oil inlet and the filling liquid of the oil cylinder solenoid directional control valve
First actuator port of valve and accumulator connection, two actuator ports of the oil cylinder solenoid directional control valve respectively with the left oil
The oil inlet of cylinder is connected with the oil inlet of the right oil cylinder, and the oil return opening of oil cylinder solenoid directional control valve is connected with the fuel tank.
This programme is commutated by oil cylinder solenoid directional control valve to change the working status of left oil cylinder and right oil cylinder.
Wherein, alternatively, oil cylinder solenoid directional control valve is three-position four-way valve.
The embodiment of second aspect of the present invention provides a kind of pumping machine, including such as any implementation of first aspect present invention
The auxiliary hydraulic system that example provides.
The pumping machine that second aspect of the present invention embodiment provides includes what first aspect present invention any embodiment provided
Auxiliary hydraulic system, thus the pumping machine have any of the above-described embodiment provide auxiliary hydraulic system all beneficial to imitate
Fruit, details are not described herein.
In the description of the present invention, it is to be understood that term " first ", " second " are only used for the purpose of description, without
It is understood that to indicate or implying relative importance, unless otherwise clearly defined and limited；Term " connection ", " installation ", " Gu
It is fixed " etc. should all be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected, or integratedly connect
Connect；It can be directly connected, can also be indirectly connected by intermediary.For the ordinary skill in the art, may be used
To understand the concrete meaning of above-mentioned term in the present invention as the case may be.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that the particular features, structures, materials, or characteristics that the embodiment or example describe are contained in the present invention
Apply in example or example.In the present specification, schematic expression of the above terms is not necessarily referring to identical embodiment or reality
Example.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. auxiliary hydraulic system, it is characterised in that including：Fuel tank, hydraulic pump, prefill valve, accumulator, main hydraulic dress Put and connected with auxiliary hydraulic work device, the oil inlet of the hydraulic pump with the fuel tank, the oil outlet of the hydraulic pump with it is described The oil inlet connection of prefill valve, the first actuator port of the prefill valve and the oil inlet and outlet of the accumulator, the main hydraulic pressure The oil inlet connection of equipment, the second actuator port of the prefill valve and the oil inlet of the auxiliary hydraulic work device connect It is logical；Wherein, the prefill valve be used for according to the outlet pressure of first actuator port control the oil inlet of the prefill valve with The conducting flow of the break-make of second actuator port of the prefill valve or/and the second actuator port of the prefill valve.
- 2. auxiliary hydraulic system according to claim 1, it is characterised in thatThe oil cylinder reversal valve between the first actuator port for being arranged on the prefill valve and the main hydraulic work device is further included, The main hydraulic work device includes left oil cylinder and right oil cylinder, and the auxiliary hydraulic work device is stirring motor；The first actuator port and the second actuator port of the oil cylinder reversal valve respectively with the oil inlet of the left oil cylinder and described Right oil cylinder oil inlet connection, the oil outlet of the left oil cylinder, the oil outlet of the right oil cylinder, the stirring motor it is fuel-displaced The oil return opening of mouth, the oil return opening of the prefill valve and the oil cylinder reversal valve is connected with the fuel tank, and the oil cylinder reversal valve Oil inlet connected with the first actuator port of the accumulator and the prefill valve.
- 3. auxiliary hydraulic system according to claim 2, it is characterised in thatThe oil cylinder reversal valve includes auxiliary selenoid reversal valve and hydraulic directional valve, and the oil inlet of the auxiliary selenoid reversal valve leads to Cross first throttle valve to connect with the first actuator port of the prefill valve, the two actuator ports difference of the auxiliary selenoid reversal valve Connected with two control terminals of the spool control chamber of the hydraulic directional valve, the oil inlet of the hydraulic directional valve and the prefill valve The first actuator port and accumulator connection, two actuator ports of the hydraulic directional valve respectively with the left oil cylinder into Hydraulic fluid port is connected with the oil inlet of the right oil cylinder, the oil return of the oil return opening and the hydraulic directional valve of the auxiliary selenoid reversal valve Mouth is connected with the fuel tank respectively；OrThe oil cylinder reversal valve includes oil cylinder solenoid directional control valve, oil inlet and the prefill valve of the oil cylinder solenoid directional control valve First actuator port and accumulator connection, two actuator ports of the oil cylinder solenoid directional control valve respectively with the left oil cylinder Oil inlet is connected with the oil inlet of the right oil cylinder, and the oil return opening of oil cylinder solenoid directional control valve is connected with the fuel tank.
- 4. auxiliary hydraulic system according to any one of claim 1 to 3, it is characterised in thatThe prefill valve includes pressure-compensated valve and check valve, the oil inlet of the prefill valve respectively with the pressure-compensated valve The oil inlet connection of oil inlet, the check valve, the second working oil of the oil outlet of the pressure-compensated valve and the prefill valve Mouth connection, the oil outlet of the check valve are connected with the first actuator port of the prefill valve；The prefill valve is used for according to institute The outlet pressure for stating the first actuator port controls the break-make or/and conducting flow of the pressure-compensated valve.
- 5. auxiliary hydraulic system according to claim 4, it is characterised in thatThe prefill valve further includes pressure shut-off valve, the first control chamber of the pressure-compensated valve, the pressure shut-off valve into Hydraulic fluid port is connected with the oil inlet of the prefill valve, and the second control chamber of the pressure-compensated valve is fuel-displaced with the pressure shut-off valve Mouth connection, and the second control chamber of the pressure-compensated valve is equipped with recuperation valve commutation spring, the first control of the pressure shut-off valve Chamber processed is equipped with stop valve pressure spring, and the oil return opening of the pressure shut-off valve is connected with the oil return opening of the prefill valve, the list Second control chamber of oil outlet and the pressure shut-off valve to valve connects.
- 6. auxiliary hydraulic system according to claim 5, it is characterised in thatSecond control chamber of the pressure shut-off valve includes the first seed oil mouth and the second seed oil mouth, the oil outlet of the check valve with The of first seed oil mouth connection, the oil outlet of the pressure shut-off valve and the second seed oil mouth and the pressure-compensated valve Two control chambers connect；The prefill valve further includes second throttle, the first control of the oil inlet of the second throttle and the pressure-compensated valve Chamber processed is connected, the oil outlet of the second throttle and the oil inlet of the check valve and the oil inlet of the pressure shut-off valve Connection.
- 7. auxiliary hydraulic system according to claim 5, it is characterised in thatThe pressure-compensated valve includes hydraulic pilot formula 2/2-way proportional control valve；The pressure shut-off valve includes hydraulic pilot formula two-bit triplet reversal valve.
- 8. auxiliary hydraulic system according to any one of claim 1 to 3, it is characterised in thatThe prefill valve includes electric control reversing valve, check valve and control unit, the oil inlet of the prefill valve respectively with the electricity Control the oil inlet connection of the oil inlet, the check valve of reversal valve, the oil outlet of the electric control reversing valve and the prefill valve Second actuator port connects, and the oil outlet of the check valve is connected with the first actuator port of the prefill valve；First actuator port of the prefill valve is connected with pressure detecting element, described control unit and the pressure detecting element And the electric control reversing valve connection, the pressure for being detected according to the pressure detecting element control the electric control reversing valve to change To.
- 9. auxiliary hydraulic system according to any one of claim 1 to 3, it is characterised in thatThe auxiliary hydraulic system further includes off-load reversal valve, and the second actuator port of the prefill valve is commutated by the off-load Valve is connected with the oil inlet of the auxiliary hydraulic work device or the fuel tank.
- 10. a kind of pumping machine, it is characterised in that including auxiliary hydraulic system as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039903.6A CN106351899B (en) | 2016-11-11 | 2016-11-11 | Auxiliary hydraulic system and pumping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039903.6A CN106351899B (en) | 2016-11-11 | 2016-11-11 | Auxiliary hydraulic system and pumping machine |
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| CN106351899A CN106351899A (en) | 2017-01-25 |
| CN106351899B true CN106351899B (en) | 2018-04-13 |
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| CN107327432B (en) * | 2017-08-25 | 2019-03-29 | 太原科技大学 | A kind of pump control cylinder hydraulic circuit and its control method |
| CN111720369B (en) * | 2020-06-30 | 2022-08-05 | 潍柴动力股份有限公司 | Liquid filling system and engineering machinery |
| CN116766660B (en) * | 2023-06-14 | 2024-03-05 | 深圳市欣茂鑫实业有限公司 | High-precision low-energy-consumption oil press and control system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2672643Y (en) * | 2003-12-10 | 2005-01-19 | 天津市精研工程机械传动有限公司 | Pulse test table for hydraulic soft tube assembly |
| CA2630199A1 (en) * | 2008-05-01 | 2009-11-01 | Multimatic Inc. | Vehicle auxiliary hydraulic system |
| CN102619794B (en) * | 2012-03-28 | 2014-12-10 | 三一汽车起重机械有限公司 | Single-cylinder bolt expansion and contraction control system and construction machine |
| CN203864670U (en) * | 2014-04-30 | 2014-10-08 | 徐州徐工筑路机械有限公司 | Land leveler double-loop running braking hydraulic system |
| CN204458598U (en) * | 2014-12-12 | 2015-07-08 | 北汽福田汽车股份有限公司 | A kind of hydraulic system and there is its engineering machinery |
| CN206221404U (en) * | 2016-11-11 | 2017-06-06 | 三一汽车制造有限公司 | Auxiliary hydraulic system and pumping machine |
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