CN106351899A - Auxiliary hydraulic pressure system and pumping machine - Google Patents
Auxiliary hydraulic pressure system and pumping machine Download PDFInfo
- Publication number
- CN106351899A CN106351899A CN201611039903.6A CN201611039903A CN106351899A CN 106351899 A CN106351899 A CN 106351899A CN 201611039903 A CN201611039903 A CN 201611039903A CN 106351899 A CN106351899 A CN 106351899A
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- Prior art keywords
- valve
- oil
- pressure
- replenishing
- hydraulic
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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 invention provides an auxiliary hydraulic pressure system and pumping machine, wherein, the auxiliary hydraulic system includes a fuel tank, a hydraulic pressure pump, a hydraulic replenishing valve, an energy accumulator, a main hydraulic pressure working device and an auxiliary hydraulic working device, the first working fuel port of the hydraulic replenishing valve is connected with the fuel inlet and outlet ports of the energy accumulator, and with the fuel inlet of the main hydraulic working device, the second working fuel port of the hydraulic replenishing valve is connected with fuel inlet port of the auxiliary hydraulic working device; the hydraulic replenishing valve is used to control the on-off of the fuel inlet port of the hydraulic replenishing valve and the second working fuel port through the outlet port pressure of the first working fuel port, and to control the conduction flow of the second working fuel port of the hydraulic replenishing valve. The pressure recharge and the return circuit of the energy accumulator in the auxiliary hydraulic pressure system and the hydraulic pressure return circuit of the auxiliary hydraulic pressure working device are integrated by present scheme, the two return circuits are provided with hydraulic pressure fuel through a hydraulic pressure pump, the hydraulic pressure fuel is distributed through the hydraulic pressure valve to charge pressure for the energy accumulator or to drive the auxiliary hydraulic pressure working device to work. The present invention reduces the amount of components in the auxiliary hydraulic system pressure, simplifies the system structure and lowers costs.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, be related to a kind of auxiliary hydraulic system and one kind to have this auxiliary
Help the pumping machine of hydraulic system.
Background technology
Its auxiliary hydraulic system of concrete pumping equipment generally includes accumulator pressurizing loop and stirring loop etc. at present, stores
Can device pressurising loop be independent with stirring loop, storage pump delivery hydraulic pressure oil is passed through in accumulator pressurizing loop, by accumulator
The valve group in pressurising loop controls accumulator pressurizing/off-load control loop pressure, and stirring loop passes through mixing pump delivery hydraulic pressure oil,
By the pressure valve control loop pressure of stirring loop, lead to entirely assist liquid system pressure number of elements many, high cost, structure is multiple
Miscellaneous, reliability is not high.
Content of the invention
Present invention seek to address that at least one technical problem present in prior art.
For this reason, a kind of it is an advantage of the invention to provide auxiliary hydraulic system.
It is a further object of the invention to provide a kind of pumping machine, including above-mentioned auxiliary hydraulic system.
For achieving the above object, the embodiment of present invention one side provides a kind of auxiliary hydraulic system, comprising: oil
Case, hydraulic pump, replenishing valve, accumulator, main hydraulic work device and auxiliary hydraulic work device, the oil-in of described hydraulic pump and oil
Case connects, and the oil-out of described hydraulic pump connects with the oil-in of described replenishing valve, the first actuator port of described replenishing valve and
The oil inlet and outlet of described accumulator, the oil-in connection of described main hydraulic work device, the second actuator port of described replenishing valve
Connect with the oil-in of described auxiliary hydraulic work device；Wherein, described replenishing valve is used for going out according to described first actuator port
The oil-in of replenishing valve described in mouthful Stress control and the break-make of the second actuator port of described replenishing valve or/and described replenishing valve
The conducting flow of the second actuator port.
This programme will be integrated for the hydraulic circuit in the accumulator pressurizing loop in auxiliary hydraulic system and auxiliary hydraulic work device
Integrally, by a hydraulic pump be two circuit supplies hydraulic oil, by replenishing valve distribute hydraulic oil think accumulator pressurizing or
Drive auxiliary hydraulic work device work.Decrease the number of elements of auxiliary liquid system pressure, simplify system structure, reduce into
This.
In the above embodiment, it is preferable that described main hydraulic work device can be other work such as an oil cylinder or motor
Make device, this sentences oil cylinder and is illustrated, now, the first actuator port of described replenishing valve and described main hydraulic work device it
Between be provided with oil cylinder reversal valve, described main hydraulic work device includes left oil cylinder and right oil cylinder, and described auxiliary hydraulic work device is
Stirring motor；First actuator port of described oil cylinder reversal valve and the second actuator port respectively with the oil-in of described left oil cylinder and
The oil-in connection of described right oil cylinder, the oil-out of described left oil cylinder, the oil-out of described right oil cylinder, the going out of described stirring motor
The oil return opening of hydraulic fluid port, the oil return opening of described replenishing valve and described oil cylinder reversal valve is connected with described fuel tank, and the commutation of described oil cylinder
The oil-in of valve is connected with the first actuator port of described accumulator and described replenishing valve.
This programme will be integrated to the accumulator pressurizing loop in auxiliary hydraulic system and stirring loop, by a hydraulic pressure
Pump is two circuit supplies hydraulic oil, distributes hydraulic oil by replenishing valve and thinks accumulator pressurizing or drive stirring motor work.
So design decreases the number of elements of auxiliary liquid system pressure, simplifies system structure, reduces cost.And divided by replenishing valve
Equipped hydraulic oil, system hydraulic pressure directly controls the spool position of replenishing valve, with control system oil circuit trend, realizes accumulator real
Shi Zidong pressurising, whole process fast response time, no spill losses, can reduce the demand to engine power, good energy-conserving effect,
And caused compression shock during accumulator conversion work state can be reduced.
Specifically, when the pressure of the first actuator port is less, hydraulic pump to the first actuator port fuel feeding, when the first work
The pressure rise of hydraulic fluid port to a certain extent, is turned on by controlling replenishing valve import and the second actuator port of replenishing valve, the second work
Make hydraulic fluid port fuel-displaced.When the pressure of accumulator is less than the higher limit that replenishing valve sets, the oil-in of replenishing valve and its first working oil
Mouth connection, is accumulator pressurizing；When the pressure of accumulator reaches the higher limit that replenishing valve sets, replenishing valve replaces, and makes replenishing valve
Oil-in connect with its second actuator port, drive stirring motor work；Accumulator is left and right oil cylinder by oil cylinder reversal valve
Fuel feeding, drives left and right cylinder efficient, when the pressure of accumulator reaches the lower limit of setting, the valve element transposition of replenishing valve, and make topping up
The oil-in of valve is connected with its first actuator port, again for accumulator pressurizing.
Wherein it is preferred to, described hydraulic pump is gear pump.
It is preferable that described oil cylinder reversal valve includes auxiliary selenoid reversal valve and surging changes in any of the above-described technical scheme
To valve, the oil-in of described auxiliary selenoid reversal valve is connected with the first actuator port of described replenishing valve by first throttle valve,
Two actuator ports of described auxiliary selenoid reversal valve are connected with two control ends of the valve element control chamber of described hydraulicchange-over valve respectively,
The oil-in of described hydraulicchange-over valve is connected with the first actuator port of described replenishing valve and described accumulator, described commutation of surging
Two actuator ports of valve are connected with the oil-in of described left oil cylinder and the oil-in of described right oil cylinder respectively, and described auxiliary selenoid changes
Connect with described fuel tank respectively to the oil return opening of valve with the oil return opening of described hydraulicchange-over valve.
In this programme, the hydraulic oil of the first actuator port outflow of replenishing valve, a hydraulic oil flows to auxiliary selenoid commutation
The oil-in of valve, another part hydraulic oil flows to the oil-in of hydraulicchange-over valve.First throttle valve is used for reducing to replenishing valve
The impact to auxiliary selenoid reversal valve for the hydraulic oil of the first actuator port, two actuator ports of auxiliary selenoid reversal valve respectively with liquid
Two control end connections of the valve element control chamber of dynamic reversal valve, auxiliary selenoid reversal valve is used for controlling the valve element position of hydraulicchange-over valve
Put.The oil-in of hydraulicchange-over valve is connected with accumulator, two actuator ports respectively with the oil-in of left oil cylinder and entering of right oil cylinder
Hydraulic fluid port connects, and for controlling left oil cylinder and right cylinder efficient, accumulator is used for ensureing the input pressure of oil cylinder.
Wherein, alternatively, auxiliary selenoid reversal valve and hydraulicchange-over valve are three-position four-way valve.
In any of the above-described technical scheme, alternatively, described oil cylinder reversal valve includes oil cylinder solenoid directional control valve, described oil cylinder
The oil-in of solenoid directional control valve is connected with the first actuator port of described replenishing valve and described accumulator, described oil cylinder electromagnetic switch
Two actuator ports of valve are connected with the oil-in of described left oil cylinder and the oil-in of described right oil cylinder respectively, oil cylinder solenoid directional control valve
Oil return opening connect with described fuel tank.
This programme commutates to change the working condition of left oil cylinder and right oil cylinder by oil cylinder solenoid directional control valve.
Wherein, alternatively, oil cylinder solenoid directional control valve is three-position four-way valve.
According to one embodiment of present invention, described replenishing valve includes pressure-compensated valve and check valve, described replenishing valve
Oil-in is connected with the oil-in of described pressure-compensated valve, the oil-in of described check valve respectively, the going out of described pressure-compensated valve
Hydraulic fluid port is connected with the second actuator port of described replenishing valve, the first working oil of the oil-out of described check valve and described replenishing valve
Mouth connection；The outlet pressure that described replenishing valve is used for according to described first actuator port controls the break-make of described pressure-compensated valve
Or/and conducting flow.
It is preferable that described replenishing valve also includes pressure shut-off valve or other can be according to the first work in technique scheme
The pressure making hydraulic fluid port turns on the valve body of oil circuit control, the first control chamber of described pressure-compensated valve, the entering of described pressure shut-off valve
Hydraulic fluid port is connected with the oil-in of described replenishing valve, and the second control chamber of described pressure-compensated valve is fuel-displaced with described pressure shut-off valve
Mouth connection, and the second control chamber of described pressure-compensated valve is provided with recuperation valve commutation spring, the first control of described pressure shut-off valve
Chamber processed is provided with stop valve pressure spring, and the oil return opening of described pressure shut-off valve is connected with the oil return opening of described replenishing valve, described list
Connect to the oil-out of valve and the second control chamber of described pressure shut-off valve.
In this programme, the part entering in the hydraulic oil of replenishing valve oil-in is entered by the first control end of pressure-compensated valve
Enter its valve element control chamber, the part flowing out in the hydraulic oil of check valve enters its valve element by the second control end of pressure shut-off valve
Control chamber, the pressure set points of pressure shut-off valve are the higher limit of replenishing valve.The pressure of accumulator is less than setting of pressure shut-off valve
During definite value, under the collective effect of pressure shut-off valve pressure spring and its valve element control chamber oil pressure, the oil-in of pressure shut-off valve
Connect with its oil-out, the hydraulic oil entering pressure shut-off valve oil-in enters its valve element by the second control end of pressure-compensated valve
Control chamber, under the collective effect of pressure-compensated valve commutation spring and its valve element control chamber oil pressure, the oil-in of pressure-compensated valve
Disconnect with its oil-out, so that the oil-in of replenishing valve is connected with its first actuator port, thus being 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 valve element control chamber oil pressure
Under, the oil return opening of pressure shut-off valve is connected with its oil-out, and pressure-compensated valve first control chamber passes through pressure shut-off valve and fuel tank
Connection, the hydraulic oil of pressure compensation valve core control chamber the first control end flows into fuel tank, pressure-compensated valve commutate spring and its
Under the collective effect of valve element control chamber oil pressure, the oil-in of pressure-compensated valve is connected with its oil-out, makes the oil-in of replenishing valve
Connect with its second actuator port, thus driving stirring motor to work；It is that left and right oil cylinder supplies that accumulator passes through oil cylinder reversal valve
Oil, when its pressure reaches the lower limit of setting, pressure shut-off valve is in the common work of its back-moving spring and its valve element control chamber oil pressure
With lower commutation so as to oil-in is connected with its oil-out, again for pressure-compensated valve the second control chamber fuel feeding, pressure-compensated valve exists
Go off state under the collective effect of its back-moving spring and its valve element control chamber oil pressure, make the oil-in of replenishing valve again with its
First actuator port connection, thus be accumulator pressurizing again.
It is preferable that the second control chamber of described pressure shut-off valve includes the first seed oil mouth in any of the above-described technical scheme
With the second seed oil mouth, the oil-out of described check valve connected with described first seed oil mouth, the oil-out of described pressure shut-off valve with
Described second seed oil mouth and the second control chamber connection of described pressure-compensated valve.
In this programme, the oil-out of pressure shut-off valve is connected with the second control chamber of pressure-compensated valve, by pressure shut-off valve
Oil-out flow out hydraulic oil in a part its valve element control chamber is entered by the second seed oil mouth of the first control end, with its valve
Hydraulic oil and its back-moving spring cooperation that other entrances of core control chamber flow into, to control the position of its valve element.
It is preferable that described replenishing valve also includes second throttle in any of the above-described technical scheme, described second throttle
Oil-in be connected with the first control chamber of described pressure-compensated valve, the oil-out of described second throttle and described check valve
Oil-in and described pressure shut-off valve oil-in connection.
In this programme, the hydraulic oil that second throttle flows into replenishing valve oil-in throttles, single for controlling flow direction
To the oil mass of valve and pressure shut-off valve, so that the part in entering the hydraulic oil of replenishing valve oil-in is by the of pressure-compensated valve
One control end enters its valve element control chamber.
It is preferable that described pressure-compensated valve includes hydraulic pilot formula 2/2-way ratio in any of the above-described technical scheme
Control valve；Described pressure shut-off valve includes hydraulic pilot formula two-bit triplet reversal valve.
According to one embodiment of present invention, described replenishing valve includes electric control reversing valve, check valve and control unit, described
The oil-in of replenishing valve is connected with the oil-in of described electric control reversing valve, the oil-in of described check valve respectively, described automatically controlled changes
Connect to the oil-out of valve and the second actuator port of described replenishing valve, the of the oil-out of described check valve and described replenishing valve
One actuator port connection；First actuator port of described replenishing valve is connected with pressure detecting element, described control unit with described
Pressure detecting element and described electric control reversing valve connect, for the electricity described in Stress control being detected according to described pressure detecting element
Control reversal valve commutation.
It is preferable that described auxiliary hydraulic system also includes off-load reversal valve, described topping up in any of the above-described technical scheme
Second actuator port of valve can be by the oil-in of described off-load reversal valve and described auxiliary hydraulic work device or described fuel tank
Connection.
In this programme, off-load reversal valve can be selected for two-bit triplet electromagnetic valve, the oil-in of two-bit triplet electromagnetic valve and topping up
Second actuator port connection of valve, the first oil-out of two-bit triplet electromagnetic valve is connected with the oil-in of stirring motor, second goes out
Hydraulic fluid port is connected with fuel tank.When needing to be stirred work, the oil-in of two-bit triplet electromagnetic valve is connected with its first oil-out,
So that the oil-out of hydraulic pump is connected with the oil-in of stirring motor with two-bit triplet electromagnetic valve by replenishing valve, thus stirring horse
Reach work.When needing to carry out off-load to the hydraulic oil of hydraulic pump conveying, the oil-in of two-bit triplet electromagnetic valve second is gone out with it
Hydraulic fluid port connects, so that the oil-out of hydraulic pump is connected with fuel tank with two-bit triplet electromagnetic valve by replenishing valve.
It is preferable that described auxiliary hydraulic system also includes overflow valve in any of the above-described technical scheme, described overflow valve
Oil-in is connected with the oil-out of hydraulic pump, and the oil-out of described overflow valve is connected with described fuel tank.
In prior art, the accumulator pressurizing loop in auxiliary hydraulic system and stirring loop are independent, and accumulator fills
Push 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 loop and stirring loop are integrated, by an overflow valve control system pressure, so can save one and overflow
Stream valve, thus reduce the cost of product.
The embodiment of second aspect present invention provides a kind of pumping machine, including the arbitrary enforcement of such as first aspect present invention
The auxiliary hydraulic system that example provides.
The pumping machine that second aspect present invention embodiment provides includes the offer of first aspect present invention any embodiment
Auxiliary hydraulic system, therefore this pumping machine have the whole beneficial effect of the auxiliary hydraulic system that any of the above-described embodiment provides
Really, will not be described here.
The additional aspect of the present invention and advantage will become obvious in following description section, or by the practice of the present invention
Recognize.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein:
Fig. 1 is the structural representation of the auxiliary hydraulic system that one embodiment of the invention provides.
Wherein, the corresponding relation between the reference in Fig. 1 and component names is:
1 fuel tank, 2 hydraulic pumps, 3 replenishing 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 hydraulicchange-over valves, 7 left oil cylinders, 8 right oil
Cylinder, 9 overflow valves, 10 first throttle valves.
Specific embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specifically real
Mode of applying is further described in detail to the present invention.It should be noted that in the case of not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Elaborate a lot of details in the following description in order to fully understand the present invention, but, the present invention also may be used
To be implemented different from mode described here using other, therefore, protection scope of the present invention is not subject to following public tool
The restriction of body embodiment.
As shown in figure 1, the embodiment of present invention one side provides a kind of auxiliary hydraulic system, comprising: include: oil
Case 1, hydraulic pump 2, replenishing valve 3, accumulator 4, main hydraulic work device and auxiliary hydraulic work device, the oil-feed of described hydraulic pump 2
Mouth is connected with fuel tank 1, and the oil-out of described hydraulic pump 2 is connected with the oil-in of described replenishing valve 3, and the first of described replenishing valve 3
Actuator port is connected with the oil inlet and outlet of described accumulator 4, the oil-in of described main hydraulic work device, described replenishing valve 3
Second actuator port is connected with the oil-in of described auxiliary hydraulic work device；Wherein, described replenishing valve 3 is used for according to described first
The outlet pressure of actuator port control the oil-in of described replenishing valve 3 and the break-make of the second actuator port of described replenishing valve 3 or/
Conducting flow with the second actuator port of described replenishing valve 3.
This programme will be integrated for the hydraulic circuit in the accumulator pressurizing loop in auxiliary hydraulic system and auxiliary hydraulic work device
Integrally, by a hydraulic pump be two circuit supplies hydraulic oil, by replenishing valve distribute hydraulic oil think accumulator pressurizing or
Drive auxiliary hydraulic work device work.Outlet pressure (i.e. the setting pressure of accumulator 4) when the first actuator port of replenishing valve 3
During less than setting pressure, hydraulic pump 2 passes through replenishing valve 3 to the first actuator port fuel feeding, when the pressure of the first actuator port is more than
When setting pressure, replenishing valve commutates, simultaneously 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, thus reducing or disconnect the pressurising to accumulator 4, easy to control, letter
Single, system stability is good, decreases the number of elements of auxiliary liquid system pressure meanwhile, simplifies system structure, reduce cost.
And distributing hydraulic oil by replenishing valve, system hydraulic pressure is directly controlled the spool position of replenishing valve, is walked with control system oil circuit
To realizing accumulator automatically pressurising, whole process fast response time, no spill losses in real time, can reduce to engine power
Demand, good energy-conserving effect, and caused compression shock during accumulator conversion work state can be reduced.
In the above embodiment, it is preferable that described main hydraulic work device can be other work such as an oil cylinder or motor
Make device, this sentences oil cylinder and is illustrated, now, the first actuator port of described replenishing valve 3 and described main hydraulic work device
Between be provided with oil cylinder reversal valve 6, described main hydraulic work device includes left oil cylinder 7 and right oil cylinder 8, described auxiliary hydraulic dress
It is set to stirring motor 5；First actuator port of described oil cylinder reversal valve 6 and the second actuator port respectively with described left oil cylinder 7
Oil-in connects with the oil-in of described right oil cylinder 8, the oil-out of described left oil cylinder 7, the oil-out of described right oil cylinder 8, described
The oil return opening of the oil-out of stirring motor 5, the oil return opening of described replenishing valve 3 and described oil cylinder reversal valve 6 respectively with described fuel tank 1
Connect, and the oil-in of described oil cylinder reversal valve 6 is connected with the first actuator port of described accumulator 4 and described replenishing valve 3.
This programme will be integrated to the accumulator 4 pressurising loop in auxiliary hydraulic system and stirring loop, by a liquid
Press pump 2 is this two circuit supplies hydraulic oil, distributes hydraulic oil by replenishing valve 3 and thinks accumulator 4 pressurising or drive stirring horse
Reach 5 work.So design decreases the number of elements of auxiliary liquid system pressure, simplifies system structure, reduces cost.And pass through
Replenishing valve 3 distributes hydraulic oil, and system hydraulic pressure directly controls the spool position of replenishing valve 3, with control system oil circuit trend, real
Existing accumulator 4 pressurising automatically, whole process fast response time, no spill losses in real time, can reduce the demand to engine power,
Good energy-conserving effect, and caused compression shock during accumulator 4 conversion work state can be reduced.
Specifically, the pressure of accumulator 4 be less than replenishing valve 3 set higher limit when, the oil-in of replenishing valve 3 with its first
Actuator port connects, and is accumulator 4 pressurising；When the pressure of accumulator 4 reaches the higher limit that replenishing valve 3 sets, replenishing valve 3 changes
Position, makes the oil-in of replenishing valve 3 connect with its second actuator port, drives stirring motor 5 to work；Accumulator 4 is changed by oil cylinder
It is left and right oil cylinder 8 fuel feeding to valve 6, drive left and right oil cylinder 8 to work, when the pressure of accumulator 4 reaches the lower limit of setting, topping up
The valve element transposition of valve 3, makes the oil-in of replenishing valve 3 connect with its first actuator port, again for accumulator 4 pressurising.
Wherein it is preferred to, described hydraulic pump 2 is gear pump.
In order to realize, " outlet pressure that described replenishing valve 3 is used for according to described first actuator port controls described replenishing valve 3
The conducting stream of the second actuator port of the break-make of the second actuator port of oil-in and described replenishing valve 3 or/and described replenishing valve 3
Amount ", replenishing valve can have multiple choices, according to a preferred embodiment of the present invention in, described replenishing valve 3 includes pressure compensation
Valve 31 and check valve 32, the oil-in of described replenishing valve 3 respectively with the oil-in of described pressure-compensated valve 31, described check valve
Oil-in connects, and the oil-out of described pressure-compensated valve 31 is connected with the second actuator port of described replenishing valve, described check valve
32 oil-out is connected with the first actuator port of described replenishing valve 3；Described replenishing valve 3 is used for according to described first actuator port
Outlet pressure control described pressure-compensated valve 31 break-make or/and conducting flow.
It is preferable that described replenishing valve 3 also includes pressure shut-off valve 33 or other can be according to first in technique scheme
The pressure of actuator port turns on the valve body of oil circuit control, the first control chamber of described pressure-compensated valve 31, described pressure shut-off valve
33 oil-in is connected with the oil-in of described replenishing valve 3, and the second control chamber of described pressure-compensated valve 31 and described pressure are cut
The oil-out connection of disconnected valve 33, and the second control chamber of described pressure-compensated valve 31 is provided with recuperation valve commutation spring, described pressure
First control chamber of stop valve 33 is provided with stop valve pressure spring, the oil return opening of described pressure shut-off valve 33 and described replenishing valve 3
Oil return opening connection, the oil-out of described check valve 32 connected with the second control chamber of described pressure shut-off valve 33.
In this programme, enter the first control by pressure-compensated valve 31 for the part in the hydraulic oil of replenishing valve 3 oil-in
End enters its valve element control chamber, and the part flowing out in the hydraulic oil of check valve 32 is entered by the second control end of pressure shut-off valve 33
Enter its valve element control chamber, the pressure set points of pressure shut-off valve 33 are the higher limit of replenishing 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 pressure shut-off valve 33 back-moving spring and its valve element control chamber oil pressure, pressure
The oil-in of power stop valve 33 is connected with its oil-out, and the hydraulic oil entering pressure shut-off valve 33 oil-in is by pressure-compensated valve 31
The second control end enter its valve element control chamber, in the common work of pressure-compensated valve 31 back-moving spring and its valve element control chamber oil pressure
With under, the oil-in of pressure-compensated valve 31 and its oil-out disconnect, and make the oil-in of replenishing valve 3 with its first actuator port even
Logical, thus being accumulator 4 pressurising；When the pressure of accumulator 4 reaches the setting value of pressure shut-off valve 33, multiple in pressure shut-off valve 33
Under the collective effect of position spring and its valve element control chamber oil pressure, the oil return opening of pressure shut-off valve 33 is connected with its oil-out, pressure
Recuperation valve 31 first control chamber is connected with fuel tank 1 by pressure shut-off valve 33, and pressure-compensated valve 31 valve element control chamber first controls
The hydraulic oil at end flows into fuel tank 1, under the collective effect of pressure-compensated valve 31 back-moving spring and its valve element control chamber oil pressure, pressure
The oil-in of recuperation valve 31 is connected with its oil-out, so that the oil-in of replenishing valve 3 is connected with its second actuator port, thus driving
Stirring motor 5 works；Accumulator 4 is left and right oil cylinder 8 fuel feeding by oil cylinder reversal valve 6, and its pressure reaches the lower limit of setting
When, pressure shut-off valve 33 commutate under the collective effect of its back-moving spring and its valve element control chamber oil pressure so as to oil-in and its
Oil-out connects, and again for pressure-compensated valve 31 second control chamber fuel feeding, pressure-compensated valve 31 is in its back-moving spring and its valve element
Go off state under the collective effect of control chamber oil pressure, so that the oil-in of replenishing valve 3 is connected with its first actuator port again,
Thus being accumulator 4 pressurising again.
It is preferable that the second control chamber of described pressure shut-off valve 33 includes the first seed oil in any of the above-described technical scheme
Mouthful and the second seed oil mouth, the oil-out of described check valve 32 connected with described first seed oil mouth, the going out of described pressure shut-off valve 33
Hydraulic fluid port is connected with the second control chamber of described second seed oil mouth and described pressure-compensated valve 31.
In this programme, the oil-out of pressure shut-off valve 33 is connected with the second control chamber of pressure-compensated valve 31, is cut by pressure
A part in the hydraulic oil that the oil-out of disconnected valve 33 flows out enters its valve element control chamber by the second seed oil mouth of the first control end,
The hydraulic oil flowing into its other entrance of valve element control chamber and its back-moving spring cooperation, to control the position of its valve element.
It is preferable that described replenishing valve 3 also includes second throttle 34, described second section in any of the above-described technical scheme
Stream valve 34 oil-in be connected with the first control chamber of described pressure-compensated valve 31, the oil-out of described second throttle 34 and
The oil-in connection of the oil-in of described check valve 32 and described pressure shut-off valve 33.
In this programme, the hydraulic oil that second throttle 34 flows into replenishing valve 3 oil-in throttles, for controlling flow direction
Check valve 32 and the oil mass of pressure shut-off valve 33, so that the part in the hydraulic oil of entrance replenishing valve 3 oil-in is mended by pressure
The first control end repaying valve 31 enters its valve element control chamber.
It is preferable that described pressure-compensated valve 31 includes hydraulic pilot formula 2/2-way ratio in any of the above-described technical scheme
Example control valve；Described pressure shut-off valve 33 includes hydraulic pilot formula two-bit triplet reversal valve.
According in another preferred embodiment of the present invention, described replenishing valve includes electric control reversing valve, check valve and control
Unit processed, the oil-in of described replenishing valve is connected with the oil-in of described electric control reversing valve, the oil-in of described check valve respectively,
The oil-out of described electric control reversing valve is connected with the second actuator port of described replenishing valve, the oil-out of described check valve with described
First actuator port connection of replenishing valve；First actuator port of described replenishing valve is connected with pressure detecting element, described control
Unit is connected with described pressure detecting element and described electric control reversing valve, for the pressure being detected according to described pressure detecting element
Control described electric control reversing valve commutation.
It is preferable that described auxiliary hydraulic system also includes off-load reversal valve, described topping up in any of the above-described technical scheme
Second actuator port of valve 3 being capable of entering by described off-load reversal valve and described auxiliary hydraulic work device (i.e. stirring motor 5)
Hydraulic fluid port or described fuel tank 1 connect.
In this programme, off-load reversal valve can be selected for two-bit triplet electromagnetic valve, the oil-in of two-bit triplet electromagnetic valve and topping up
Second actuator port connection of valve 3, the first oil-out of two-bit triplet electromagnetic valve is connected with the oil-in of stirring motor 5, second
Oil-out is connected with fuel tank 1.When needing to be stirred work, the oil-in of two-bit triplet electromagnetic valve is with its first oil-out even
Logical, so that the oil-out of hydraulic pump 2 is connected with the oil-in of stirring motor 5 with two-bit triplet electromagnetic valve by replenishing valve 3, thus
Stirring motor 5 works.When need to hydraulic pump 2 conveying hydraulic oil carry out off-load when, the oil-in of two-bit triplet electromagnetic valve with
Its second oil-out connects, so that the oil-out of hydraulic pump 2 is connected with fuel tank 1 with two-bit triplet electromagnetic valve by replenishing valve 3.
It is preferable that described auxiliary hydraulic system also includes overflow valve 9, described overflow valve 9 in any of the above-described technical scheme
Oil-in connect with the oil-out of hydraulic pump 2, the oil-out of described overflow valve 9 is connected with described fuel tank 1.
In prior art, the accumulator pressurizing loop in auxiliary hydraulic system and stirring loop are independent, and accumulator fills
Push 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 4 pressurising loop and stirring loop are integrated, by an overflow valve 9 control system pressure, so can save one
Overflow valve 9, thus reduce the cost of product.
Wherein, the design of described oil cylinder reversal valve 6 includes numerous embodiments:
Embodiment one:
As described in Figure 1, described oil cylinder reversal valve 6 includes auxiliary selenoid reversal valve 61 and hydraulicchange-over valve 62, described auxiliary
Solenoid directional control valve 61 and described hydraulicchange-over valve 62 are three-position four-way valve, the oil-in of described auxiliary selenoid reversal valve 61 and
The oil-out connection of one choke valve 10, the first actuator port of the oil-in of described first throttle valve 10 and described replenishing valve 3 and
Described accumulator 4 connects, the two actuator ports valve element with described hydraulicchange-over valve 62 respectively of described auxiliary selenoid reversal valve 61
Two control end connections, the first actuator port of the oil-in of described hydraulicchange-over valve 62 and described replenishing valve 3 and the institute of control chamber
State accumulator 4 to connect, two actuator ports oil-in and the described right oil with described left oil cylinder 7 respectively of described hydraulicchange-over valve 62
The oil-in connection of cylinder 8, the oil return opening of described auxiliary selenoid reversal valve 61 and the oil return opening of described hydraulicchange-over valve 62 respectively with
Described fuel tank 1 connects.
In this programme, the hydraulic oil of the first actuator port outflow of replenishing valve 3, a hydraulic oil flows to auxiliary selenoid commutation
The oil-in of valve 61, another part hydraulic oil flows to the oil-in of hydraulicchange-over valve 62.First throttle valve is used for reducing to topping up
The impact to auxiliary selenoid reversal valve for the hydraulic oil of the first actuator port of valve, two actuator ports of auxiliary selenoid reversal valve 61 divide
Do not connect with two control ends of the valve element control chamber of hydraulicchange-over valve 62, auxiliary selenoid reversal valve 61 is used for controlling hydraulicchange-over valve
62 spool position.The oil-in of hydraulicchange-over valve 62 is connected with accumulator 4, the oil-feed with left oil cylinder 7 respectively of two actuator ports
Mouth connects with the oil-in of right oil cylinder 8, and for controlling left oil cylinder 7 and right oil cylinder 8 to work, accumulator is used for ensureing the oil-feed of oil cylinder
Pressure.
Embodiment two: (not shown)
Described oil cylinder reversal valve includes oil cylinder solenoid directional control valve, the oil-in of described oil cylinder solenoid directional control valve and described topping up
First actuator port of valve and the connection of described accumulator, two actuator ports of described oil cylinder solenoid directional control valve respectively with described left oil
The oil-in of cylinder connects with the oil-in of described right oil cylinder, and the oil return opening of oil cylinder solenoid directional control valve is connected with described fuel tank.
This programme commutates to change the working condition of left oil cylinder and right oil cylinder by oil cylinder solenoid directional control valve.
Wherein, alternatively, oil cylinder solenoid directional control valve is three-position four-way valve.
The embodiment of second aspect present invention provides a kind of pumping machine, including the arbitrary enforcement of such as first aspect present invention
The auxiliary hydraulic system that example provides.
The pumping machine that second aspect present invention embodiment provides includes the offer of first aspect present invention any embodiment
Auxiliary hydraulic system, therefore this pumping machine have the whole beneficial effect of the auxiliary hydraulic system that any of the above-described embodiment provides
Really, will not be described here.
In describing the invention it is to be understood that term " first ", " second " are only used for the purpose describing, and not
It is understood that as indicating or implying relative importance, unless otherwise clearly defined and limited；Term " connection ", " installation ", " Gu
Fixed " etc. all should be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected, or integratedly connects
Connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, may be used
To understand above-mentioned term concrete meaning in the present invention as the case may be.
In the description of this specification, the description of term " embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that the specific features with reference to this embodiment or example description, structure, material or feature are contained at least one reality of the present invention
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of auxiliary hydraulic system is it is characterised in that include: fuel tank, hydraulic pump, replenishing valve, accumulator, main hydraulic dress
Put and auxiliary hydraulic work device, the oil-in of described hydraulic pump is connected with described fuel tank, the oil-out of described hydraulic pump with described
Oil-in connection, the first actuator port of described replenishing valve and the oil inlet and outlet of described accumulator, the described main hydraulic pressure of replenishing valve
The oil-in connection of equipment, the second actuator port of described replenishing valve is connected with the oil-in of described auxiliary hydraulic work device
Logical；
Wherein, described replenishing valve be used for according to the outlet pressure of described first actuator port control the oil-in of described replenishing valve with
The conducting flow of the second actuator port of the break-make of the second actuator port of described replenishing valve or/and described replenishing valve.
2. auxiliary hydraulic system according to claim 1 it is characterised in that
Also include the oil cylinder reversal valve being arranged between the first actuator port of described replenishing valve and described main hydraulic work device,
Described main hydraulic work device includes left oil cylinder and right oil cylinder, and described auxiliary hydraulic work device is stirring motor；
First actuator port of described oil cylinder reversal valve and the second actuator port respectively with the oil-in of described left oil cylinder and described
Right oil cylinder oil-in connection, the oil-out of described left oil cylinder, the oil-out of described right oil cylinder, described stirring motor fuel-displaced
The oil return opening of mouth, the oil return opening of described replenishing valve and described oil cylinder reversal valve is connected with described fuel tank, and described oil cylinder reversal valve
Oil-in connect with the first actuator port of described accumulator and described replenishing valve.
3. auxiliary hydraulic system according to claim 2 it is characterised in that
Described oil cylinder reversal valve includes auxiliary selenoid reversal valve and hydraulicchange-over valve, and the oil-in of described auxiliary selenoid reversal valve leads to
Cross first throttle valve to connect with the first actuator port of described replenishing valve, two actuator ports of described auxiliary selenoid reversal valve are respectively
Connect with two control ends of the valve element control chamber of described hydraulicchange-over valve, the oil-in of described hydraulicchange-over valve and described replenishing valve
The first actuator port and the connection of described accumulator, two actuator ports of described hydraulicchange-over valve respectively with the entering of described left oil cylinder
Hydraulic fluid port connects with the oil-in of described right oil cylinder, the oil return opening of described auxiliary selenoid reversal valve and the oil return of described hydraulicchange-over valve
Mouth is connected with described fuel tank respectively；Or
Described oil cylinder reversal valve includes oil cylinder solenoid directional control valve, the oil-in of described oil cylinder solenoid directional control valve and described replenishing valve
First actuator port and the connection of described accumulator, two actuator ports of described oil cylinder solenoid directional control valve respectively with described left oil cylinder
Oil-in connects with the oil-in of described right oil cylinder, and the oil return opening of oil cylinder solenoid directional control valve is connected with described fuel tank.
4. auxiliary hydraulic system according to any one of claim 1 to 3 it is characterised in that
Described replenishing valve includes pressure-compensated valve and check valve, the oil-in of described replenishing valve respectively with described pressure-compensated valve
Oil-in, the oil-in connection of described check valve, the second working oil of the oil-out of described pressure-compensated valve and described replenishing valve
Mouth connection, the oil-out of described check valve is connected with the first actuator port of described replenishing valve；Described replenishing valve is used for according to institute
The outlet pressure stating the first actuator port controls break-make or/and the conducting flow of described pressure-compensated valve.
5. auxiliary hydraulic system according to claim 4 it is characterised in that
Described replenishing valve also includes pressure shut-off valve, the first control chamber of described pressure-compensated valve, the entering of described pressure shut-off valve
Hydraulic fluid port is connected with the oil-in of described replenishing valve, and the second control chamber of described pressure-compensated valve is fuel-displaced with described pressure shut-off valve
Mouth connection, and the second control chamber of described pressure-compensated valve is provided with recuperation valve commutation spring, the first control of described pressure shut-off valve
Chamber processed is provided with stop valve pressure spring, and the oil return opening of described pressure shut-off valve is connected with the oil return opening of described replenishing valve, described list
Connect to the oil-out of valve and the second control chamber of described pressure shut-off valve.
6. auxiliary hydraulic system according to claim 5 it is characterised in that
Second control chamber of described pressure shut-off valve includes the first seed oil mouth and the second seed oil mouth, the oil-out of described check valve with
The of described first seed oil mouth connection, the oil-out of described pressure shut-off valve and described second seed oil mouth and described pressure-compensated valve
Two control chamber connections；
Described replenishing valve also includes second throttle, and the oil-in of described second throttle is controlled with the first of described pressure-compensated valve
Chamber processed is connected, the oil-out of described second throttle and the oil-in of described check valve and the oil-in of described pressure shut-off valve
Connection.
7. auxiliary hydraulic system according to claim 5 it is characterised in that
Described pressure-compensated valve includes hydraulic pilot formula 2/2-way proportional control valve；
Described 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 that
Described replenishing valve includes electric control reversing valve, check valve and control unit, the oil-in of described replenishing valve respectively with described electricity
The oil-in of control reversal valve, the oil-in connection of described check valve, the oil-out of described electric control reversing valve and described replenishing valve
Second actuator port connection, the oil-out of described check valve is connected with the first actuator port of described replenishing valve；
First actuator port of described replenishing valve is connected with pressure detecting element, described control unit and described pressure detecting element
And described electric control reversing valve connects, for being changed according to the electric control reversing valve described in Stress control that described pressure detecting element detects
To.
9. auxiliary hydraulic system according to any one of claim 1 to 3 it is characterised in that
Described auxiliary hydraulic system also includes off-load reversal valve, and the second actuator port of described replenishing valve is commutated by described off-load
Valve is connected with the oil-in of described auxiliary hydraulic work device or described fuel tank.
10. a kind of pumping machine is it is characterised in that include auxiliary hydraulic system as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611039903.6A CN106351899B (en) | 2016-11-11 | 2016-11-11 | Auxiliary hydraulic system and pumping machine |
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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 |
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| CN106351899B CN106351899B (en) | 2018-04-13 |
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| CN107327432A (en) * | 2017-08-25 | 2017-11-07 | 太原科技大学 | A kind of pump control cylinder hydraulic circuit and its control method |
| CN111720369A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Liquid filling system and engineering machinery |
| CN112112848A (en) * | 2020-09-24 | 2020-12-22 | 圣邦集团有限公司 | Double-loop hydraulic system |
| CN116766660A (en) * | 2023-06-14 | 2023-09-19 | 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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| CN116766660A (en) * | 2023-06-14 | 2023-09-19 | 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 | Publication date |
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| CN106351899B (en) | 2018-04-13 |
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