CN107906059A - A kind of high-pressure pump voltage-stabilizing system and method - Google Patents
A kind of high-pressure pump voltage-stabilizing system and method Download PDFInfo
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- CN107906059A CN107906059A CN201711076454.7A CN201711076454A CN107906059A CN 107906059 A CN107906059 A CN 107906059A CN 201711076454 A CN201711076454 A CN 201711076454A CN 107906059 A CN107906059 A CN 107906059A
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- pressure accumulator
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 54
- 230000009471 action Effects 0.000 claims description 34
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000007664 blowing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
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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)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
A kind of voltage-stabilizing system and method for high-pressure hydraulic pump test, the voltage-stabilizing system includes subject hydraulic pump, high pressure accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control unit, the high pressure accumulator is connected with hydraulic pump outlet oil circuit, the low pressure accumulator is connected by accumulator switching device and hydraulic pump outlet oil circuit, after the subject hydraulic pump is opened, pressure sensor monitoring oil circuit pressure, when pressure is less than preset value, fluid enters low pressure accumulator by accumulator switching device, system pressure is maintained to stablize by low pressure accumulator, when pressure is more than preset value, control unit controls the accumulator switching device to switch over, oil circuit ends with the low pressure accumulator passage, system pressure is maintained to stablize by high pressure accumulator.
Description
Technical field
The present invention relates to a kind of hydraulic pump voltage-stabilizing system, especially a kind of high-pressure hydraulic pump test voltage-stabilizing system and user
Method.
Background technology
High-pressure hydraulic pump generally uses plunger-type structure at present, therefore often occurs pressure and flow pulsation in hydraulic system,
Pulsation can be reduced by way of connecing accumulator in hydraulic pump outlet, but in high-pressure hydraulic pump performance test, due to
High-pressure pump nominal pressure is very high, will carry out overload test plus hydraulic pump delivery test, this causes whole oil system pressure regulation
Scope is very big, even up to 0-50Mpa.Pump test hydraulic system generally uses single accumulator now, in Hi-pot test system
In system, if charging pressure of accumulator is low, although can meet the regulatory requirements under system low-voltage state, in a high voltage state,
Accumulator can then exceed loading range, accumulator be damaged greatly, or even there are certain danger.Conversely, if accumulator is inflated
Pressure is high, though can meet the regulatory requirements under system high pressure state, for system in low-pressure state, accumulator can not be good
Pressure and the flow pulsation of high-pressure pump are absorbed, certain impact can be caused to whole hydraulic system.
The content of the invention
The present invention provides a kind of voltage-stabilizing system of high-pressure hydraulic pump, the voltage-stabilizing system includes subject hydraulic pump, high pressure
Accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control unit；The high pressure accumulator and hydraulic pump outlet
Oil circuit is connected, and the low pressure accumulator is connected by accumulator switching device and hydraulic pump outlet oil circuit, the subject hydraulic pump
After unlatching, pressure sensor monitoring oil circuit pressure, when pressure is less than preset value, fluid enters low pressure by accumulator switching device
Accumulator, maintains system pressure to stablize by low pressure accumulator, and when pressure is more than preset value, control unit controls the accumulator switching
Device switches over, and oil circuit ends with the low pressure accumulator passage, maintains system pressure to stablize by high pressure accumulator.
When accumulator switching device closes oil circuit with low pressure accumulator passage, the passage between low pressure accumulator and liquid case
Open, remaining fluid returns to liquid case by this passage in low pressure accumulator.
Preferably, accumulator switching device uses type pilot solenoid directional control valve.
Preferably, the high pressure accumulator pressure value different with low pressure accumulator preliminary filling, as range of regulation is 0-50MPa
Hydraulic system high pressure accumulator preacceleration inflation force value is 30-40MPa, and low pressure accumulator preacceleration inflation force value is 15-25Mpa,
Present invention also offers a kind of method for stabilizing voltage of hydraulic pump, it is characterised in that：High pressure accumulator is connected in oil circuit, it is low
Accumulator, solenoid directional control valve and pressure sensor are pressed, high pressure accumulator is connected with hydraulic pump outlet oil circuit, and low pressure accumulator leads to
Solenoid directional control valve is crossed to connect with hydraulic pump outlet oil circuit.Control method comprises the following steps：
A oil circuits are opened, preset pressure value；
B does not send control signal to the electromagnetic priority valve of control electromagnetic switch valve core action, and electromagnetic switch valve core is not
Action, fluid are opened with low pressure accumulator passage；
The current oil circuit system pressure of C pressure sensor monitorings, when system pressure is less than setting pressure, goes to step D,
When system pressure is higher than setting pressure, step E is gone to；
D stops sending out to the electromagnetic priority valve of control electromagnetic switch valve core action when system pressure is less than setting pressure
Control signal is sent, system is opened with low pressure accumulator passage, and fluid enters low pressure accumulator by solenoid directional control valve, and system is by low
Accumulator is pressed to maintain pressure stability；
E is more than preset value when system pressure, and control letter is sent to the solenoid directional control valve of control electromagnetic switch valve core action
Number, electromagnetic switch valve core commutates, and the passage of system and low pressure accumulator ends, and the passage between low pressure accumulator and liquid case is beaten
Open, remaining fluid returns to liquid case by this passage in low pressure accumulator, and system maintains pressure stability by high pressure accumulator；
F. judged, if tested high-pressure pump is not stopped, repeat step C to E, if high-pressure pump is stopped, carries out
Step G；
G stops to control solenoid directional control valve transmission control signal, solenoid directional control valve valve core reset, low pressure accumulator and liquid
The passage of press pump outlet is opened, and low pressure accumulator is turned on hydraulic pump outlet, and path ends between low pressure accumulator and liquid case.
Preferably, solenoid directional control valve is type pilot solenoid directional control valve.
Preferably, in above-mentioned steps F, host computer carries out delay judgement.
In another embodiment, accumulator switching device uses the solenoid directional control valve of bivalve cored structure, it is preferred to use
The type pilot solenoid directional control valve of bivalve cored structure.The pilot-type solenoid valve includes the first spool and the second spool, and described first
Cartridge inlet and hydraulic pump outlet oil circuit are connected, the second cartridge inlet and the low pressure accumulator described in outlet, and described the
Two cartridge inlets are then connected with first cartridge outlet and the low pressure accumulator, and second spool also leaves to be connected with liquid case
The passage connect, this passage ends under original state.First spool controls break-make, and second spool can be by accumulator
Remaining liquid is laid down.When pressure is more than preset value, control unit controls first spool to commutate so that oil circuit is stored with the low pressure
The passage cut-off of energy device, while the second spool commutates and the passage between low pressure accumulator and liquid case is opened, it is residual in low pressure accumulator
The fluid deposited returns to liquid case by the second spool.
It is preferred that two spool strings use integral structure, it is connected by swivel nut with valve body.
It is preferred that be provided with stomata on the control spool of the first spool, during being acted to prevent thrust movable valve plug, its inner cavity with
Cross between liquid covers and form closed air cavity and can not reliably end.
In another embodiment, using the solenoid directional control valve of bivalve cored structure as accumulator switching device, wherein
The solenoid directional control valve and pressure that high pressure accumulator, low pressure accumulator, including the first spool and the second spool are connected in oil circuit pass
Sensor, high pressure accumulator are connected with hydraulic pump outlet oil circuit, and low pressure accumulator passes through solenoid directional control valve and hydraulic pump outlet oil circuit
Connect, voltage stabilizing control method comprises the following steps：
A oil circuits are opened, preset pressure value,
B does not send control signal, first valve to the electromagnetic priority valve of the first spool of control and the action of the second spool
Core and the second spool are failure to actuate, and hydraulic pump outlet fluid is opened with low pressure accumulator passage, between low pressure accumulator and liquid case
Path ends；
The current oil circuit system pressure of C pressure sensor monitorings, when system pressure is less than setting pressure, goes to step D,
When system pressure is higher than setting pressure, step E is gone to
D stops the electromagnetic priority valve of the first spool of control and the action of the second spool when system pressure is less than setting pressure
Control signal is only sent, the first spool of solenoid directional control valve and the second spool are all failure to actuate, hydraulic pump outlet fluid and low pressure accumulation of energy
Device passage is opened, and path ends between low pressure accumulator and liquid case, fluid respectively by the first spool liquid pass hole, the first spool and
Liquid passage is crossed between second spool, the annular chamber outside the second spool enters low pressure accumulator, and system is maintained by low pressure accumulator
Pressure stability；
E is more than preset value when system pressure, and control is sent to the electromagnetic priority valve of control the first spool action by control system
Signal processed, the action of the first spool, hydraulic pump outlet oil circuit end with low pressure accumulator path, and fluid stops entering low pressure accumulation of energy
Device, system maintains pressure stability by high pressure accumulator, while sends control letter to the electromagnetic priority valve of control the second spool action
Number, the action of the second spool, passage is opened between low pressure accumulator and liquid case, and remaining fluid returns to liquid case in low pressure accumulator；
F. judged, if tested high-pressure pump is not stopped, repeat step C to E, if high-pressure pump is stopped, carries out
Step G；
G stops sending control signal, institute to the solenoid directional control valve of the action of the first spool of control and control the second spool action
State the passage opening of the first spool and the second valve core reset, low pressure accumulator and hydraulic pump outlet, low pressure accumulator and hydraulic pump
Outlet conducting, path ends between low pressure accumulator and liquid case.
Preferably, solenoid directional control valve is type pilot solenoid directional control valve.
Preferably, in above-mentioned steps F, host computer carries out delay judgement.
The steady pressure of system scheme that high-low pressure accumulator switches in the present invention, by the accumulation of energy for setting two different pressures scopes
Device, solves the problems, such as that single accumulator can not meet that high-pressure pump tests hydraulic pressure system testing demand well, realizes low pressure storage
Automatic cut-off and drainage of the energy device in system high pressure state, to maintain pressure of the hydraulic system under different pressures state steady
It is fixed.
The implementation of double spool, more compact structure are used in the present invention；If wherein some electromagnetic priority valve failure at the same time,
System pressure is stablized and there will not be too big influence, system stability higher.It can realize that the automatic of valve cuts using electromagnetic priority valve
Change；Control spool is provided with stomata, to ensure the reliable sealing of spool and valve seat；Spool string uses the structure of integral plugged formula, tears open
Dress is convenient.
Entirely voltage-stabilizing system is built simple, reliable, can realize that whole hydraulic pressure is stablized automatic with reference to upper computer software
Change control, simple operation.
Brief description of the drawings
Fig. 1 is the systematic schematic diagram of the voltage-stabilizing system first embodiment of disclosure hydraulic pump test；
Fig. 2 is the voltage-stabilizing system first embodiment method flow diagram of disclosure hydraulic pump test；
Fig. 3 is the systematic schematic diagram of the voltage-stabilizing system second embodiment of disclosure hydraulic pump test；
Reference numeral：
1- is tested high-pressure pump；2- drives motor；3- filters；4- low pressure accumulators；5- type pilot solenoid directional control valves；6- is pressed
Force snesor；7- high pressure accumulators；8- pressure regulator valves；9- coolers；10- safety valves；11- liquid cases.
12 type pilot double spool solenoid directional control valves；The first spools of 12-1；The second spools of 12-2,12-3 control the first spool to move
The electromagnetic priority valve of work；12-4 controls the electromagnetic priority valve of the second spool action；
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is purged, is complete
Site preparation describes, it is clear that described embodiment is only disclosure part of the embodiment, instead of all the embodiments.It is based on
Embodiment in the disclosure, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of disclosure protection.
Embodiment 1
Fig. 1 is the schematic diagram of the voltage-stabilizing system of hydraulic pump test of the present invention, it mainly includes：1- is tested high-pressure pump；2-
Drive motor；3- filters；4- low pressure accumulators；5- type pilot solenoid directional control valves；6- pressure sensors；7- high pressure accumulators；
8- pressure regulator valves；9- coolers；10- safety valves；11- liquid cases.
Motor 2 is driven to drive the subject imbibition from liquid case 11 of high-pressure pump 1, fluid passes through 3 pressure regulator valve 8 of filter and cooler 9
Afterwards, liquid case is come back to；A high pressure accumulator 7 in parallel and a low pressure accumulator 4, its mesolow in the outlet of subject high-pressure pump 1
A type pilot solenoid directional control valve 5 is concatenated before accumulator 4；At the same time pressure sensor 6 and safety valve are connect in the outlet of subject high-pressure pump 1
10。
Wherein filter filtering fluid, pressure sensor reponse system pressure, cooperation upper computer software realize oneself of system
Dynamicization controls, and cooler carries out fluid cooling, and safety valve plays the overload protection of carry out system.
Its hydraulic pump tests system and realizes that its control flow is as shown in Figure 2 with reference to upper computer software using following methods：
Subject high-pressure pump 1 starts, and system is in No Load Start state, and preset pressure value is set in upper computer software, this
When host computer do not send control signal to the electromagnetic priority valve of solenoid directional control valve 5, fluid, which passes through solenoid directional control valve 5 and enters low pressure, to be stored
Can device 4, though high pressure accumulator 7 is always on, since its blowing pressure is high, system pressure can't make its air bag occur compared with
Big deflection, at this time system due to pressure it is low, pressure stabilization function is realized by the low low pressure accumulator 4 of the blowing pressure.Thereafter exist
Circulation is judged in software, when system pressure is less than setting pressure, to the electromagnetic priority valve of type pilot solenoid directional control valve 5 still
Control signal is not sent, system still realizes pressure stabilization function by the low low pressure accumulator 4 of the blowing pressure；When system pressure is more than
During setup pressure value, host computer sends the electromagnetic priority valve of type pilot solenoid directional control valve 5 control signal, and the commutation of its spool, is
The passage united to low pressure accumulator 4 ends, while the passage between low pressure accumulator 4 and liquid case is opened, and remains in low pressure accumulator 4
Interior fluid returns to liquid case by this passage, and at this time, pump discharge ends with low pressure accumulator 4, and system is maintained by high pressure accumulator 7
Pressure stability.Slightly it is delayed in upper computer software, continues to judge, if tested high-pressure pump 1 is stopped, host computer stops
Control signal is sent to the electromagnetic priority valve of solenoid directional control valve 5, if tested high-pressure pump 1 is not stopped, return continues cycling through
Judge relation between system pressure value and preset pressure value.
Embodiment 2
Referring to Fig. 3, the other connection relations of liquid channel system are with embodiment 1, and in the present embodiment, solenoid directional control valve uses guide
Type double spool solenoid directional control valve 12, wherein the entrance of the first spool 12-1 is connected with the outlet of subject high-pressure pump 1, outlet low pressure
The entrance of 4 and second spool 12-2 of accumulator, the second spool 12-2 outlets then connect liquid case 11.Wherein the first spool is responsible for leading to
Disconnected, the second spool makes the liquid in low pressure accumulator return in liquid case.
Its hydraulic pump is tested steady pressure of system scheme and is realized using following voltage stabilizing scheme, is tested high-pressure pump 1 first and starts, system
In No Load Start state, preset pressure value is set in upper computer software, at this time to type pilot double spool solenoid directional control valve 12
The electromagnetic priority valve 12-3 that the first spool acts and the electromagnetic priority valve 12-4 that the second spool of control acts is controlled not to send control
Signal, its first spool 12-1 and the second spool 12-2 are failure to actuate, and fluid is by the first spool 12-1, into low pressure accumulator 4,
Though high pressure accumulator 7 is always on, since its blowing pressure is high, system pressure can't make its air bag that larger deformation occur
Amount, system plays the role of steady pressure of system by the low low pressure accumulator 4 of the blowing pressure at this time.Thereafter circulation is sentenced in software
Disconnected, when system pressure is less than setup pressure value, host computer controls the first spool to move type pilot double spool solenoid directional control valve 12
The electromagnetic priority valve 12-3 of the work and electromagnetic priority valve 12-4 of control the second spool action does not send control signal still, system according to
Pressure stabilization function is so realized by the low low pressure accumulator 4 of the blowing pressure；When system pressure meets or exceeds preset pressure value, lead to
Cross electromagnetic priority valve 12-3 and control that upper computer software controls the action of the first spool to type pilot double spool solenoid directional control valve 12
The electromagnetic priority valve 12-4 of second spool action sends control signal, the first spool 12-1 commutations, and system to low pressure accumulator 4 is led to
Road ends, while the second spool 12-2 commutates, and remaining fluid returns to liquid case by the second spool 12-2 in low pressure accumulator 4,
At this time, low pressure accumulator 4 ends, and system maintains pressure stability by high pressure accumulator 7.Slightly it is delayed in upper computer software, after
Continuous to be judged, if tested high-pressure pump 1 is stopped, host computer stops sending control to the electromagnetic priority valve of solenoid directional control valve 5
Signal, if tested high-pressure pump 1 is not stopped, return, which continues cycling through, to be judged to close between system pressure value and preset pressure value
System.
First spool spool string and the second spool spool string use integral structure, are connected by screw, and pass through swivel nut
It is connected with valve body, it is convenient for disassembly and assembly.Two electromagnetic priority valve designs form electromagnetic priority valve in a valve block.
System work when, P mouthful with subject high pressure pump outlet connection, when system is in low-pressure state, fluid by P mouthfuls,
Enter low pressure accumulator through the first valve core valve stem liquid pass hole, the first spool spool swivel nut liquid pass hole, passage A, system is stored by low pressure
Can device maintenance pressure stability.With reference to upper computer software, when system pressure is higher than setting pressure, at this time to electromagnetic priority valve 28
Two electromagnet send control signal at the same time, and P mouthfuls of fluid, enters electromagnetic priority valve by filter, and is changed through electromagnetic priority valve
Control mouth K1 and K2 are respectively enterd backward, and wherein K1 mouthfuls of fluid, into control chamber, acts under the first spool control spool here
On the annular end face for holding control chamber, its active force is more than the active force for acting on the first spool control spool top ring shape end face,
Promoting the first spool control spool to act upwards, and be pressed on the first valve seat, the spool of the first spool control here is provided with stomata,
To prevent from during promoting the first spool control spool to act upwards, controlling shape between valve core cavity and the first valve core valve stem
Into closed air cavity, and cause the first spool control spool can not be pressed on the first spool valve seat, make P mouthful and low pressure accumulator without
Method is reliably ended.End at this time with the first spool spool swivel nut liquid pass hole for P mouthfuls, fluid cannot be introduced into low pressure accumulator；K2 at the same time
The control liquid of mouth, acts on the control terminal of the second valve core valve stem, and the second valve core valve stem overcomes the spring force of spring so that the second valve
Cover liquid pass hole and the second valve core valve stem liquid pass hole is connected, remaining fluid passes through A mouthfuls, the second valve pocket liquid pass hole in low pressure accumulator
Connected with the second valve core valve stem liquid pass hole, return to liquid case through T mouthfuls, system maintains pressure stability by high pressure accumulator at this time.When being
When pressure of uniting is less than setting pressure, then stop sending control signal to electromagnetic priority valve, K1 and K2 mouthful are without controlling liquid, the first spool
Control spool resets under the action of P mouthfuls of pressure, and the P mouthfuls of passages between low pressure accumulator are opened, while the second valve core valve stem
Under spring force, it is pressed against on the second spool valve seat, low pressure accumulator is ended with T mouthfuls of passages, system is again by low
Accumulator is pressed to maintain pressure stability.
Use in embodiment two and be the advantages of bivalve cored structure：If control the electromagnetic priority valve event of the first spool action
Barrier, when system pressure is more than setting pressure, the electromagnetic priority valve of control unit to the first spool of control and the action of the second spool is same
When send control signal, the first spool and is failure to actuate due to the electromagnetic priority valve failure of control the first spool action at this time, second
Spool commutates, and low pressure accumulator is opened with liquid case passage, the high-voltage oil liquid from hydraulic pump returns to liquid by this passage at this time
Case, protection is realized to low pressure accumulator；If the electromagnetic priority valve failure of the second spool action is controlled, when system pressure is more than
When setting pressure, the electromagnetic priority valve of control unit to the first spool of control and the action of the second spool sends control signal at the same time, the
One spool commutates, and hydraulic pump outlet oil circuit is ended with low pressure accumulator passage, and system plays pressure stabilization function by high pressure accumulator,
The second spool is due to the electromagnetic priority valve failure of control the second spool action at this time, and is failure to actuate, and low pressure accumulator is straight with liquid case
The passage connect can not be opened so that a part of fluid can be remained in low pressure accumulator, when system pressure is less than setting value or system
When being stopped, the electromagnetic priority valve of control unit to the first spool of control and the action of the second spool stops sending control signal, the
One valve core reset, the channel conductive of low pressure accumulator and hydraulic pump outlet oil circuit, the fluid remained in low pressure accumulator pass through
System unloads oil return box；
Embodiment of above is only suitable for the explanation disclosure, and is not the limitation to the disclosure, in relation to the common of technical field
Technical staff, in the case where not departing from spirit and scope of the present disclosure, can also make a variety of changes and modification, therefore all
Equivalent technical solution falls within the category of the disclosure, and the scope of patent protection of the disclosure should be defined by the claims.
Claims (8)
1. a kind of voltage-stabilizing system of high-pressure hydraulic pump, the voltage-stabilizing system includes hydraulic pump, high pressure accumulator, low pressure accumulator,
Accumulator switching device, pressure sensor, control unit；The high pressure accumulator is connected with hydraulic pump outlet oil circuit, the low pressure
Accumulator switches switching valve by accumulator and is connected with hydraulic pump outlet oil circuit, after the subject hydraulic pump is opened, pressure sensing
Device monitors oil circuit pressure, and when pressure is less than preset value, fluid enters low pressure accumulator by accumulator switching device, stored by low pressure
Energy device maintains system pressure to stablize, and when pressure is more than preset value, control unit controls the accumulator switching device to switch over, oil
Road is ended with the low pressure accumulator passage, maintains system pressure to stablize by high pressure accumulator.
2. the voltage-stabilizing system of high-pressure hydraulic pump as claimed in claim 1, it is characterised in that：The accumulator switching device is first
Conductivity type solenoid directional control valve.
3. the voltage-stabilizing system of high-pressure hydraulic pump as claimed in claim 1 or 2, it is characterised in that：High pressure accumulator Preliminary pressure-filled
It is 15-25Mpa to be worth for 30-40MPa, low pressure accumulator preacceleration inflation force value.
4. the voltage-stabilizing system of high-pressure hydraulic pump as claimed in claim 2, it is characterised in that：The type pilot solenoid directional control valve is
Bivalve cored structure, including the first spool and the second spool, first cartridge inlet are connected with hydraulic pump outlet oil circuit, and outlet connects
Lead to second cartridge inlet and the low pressure accumulator, second cartridge inlet then with first cartridge outlet and described
Low pressure accumulator connects.
5. the voltage-stabilizing system of high-pressure hydraulic pump as claimed in claim 6, it is characterised in that：Described two spool strings are using one
Formula structure, is connected by swivel nut with valve body；It is preferred that it is provided with stomata on the control spool of the first spool.
A kind of 6. hydraulic pump method for stabilizing voltage, it is characterised in that：High pressure accumulator, low pressure accumulator, electromagnetic switch are connected in oil circuit
Valve and pressure sensor, high pressure accumulator are connected with hydraulic pump outlet oil circuit, and low pressure accumulator passes through solenoid directional control valve and liquid
Press pump outlet oil circuit is connected.Control method comprises the following steps：
A oil circuits are opened, preset pressure value；
B does not send control signal to the electromagnetic priority valve of control electromagnetic switch valve core action, and electromagnetic switch valve core is failure to actuate,
Fluid is opened with low pressure accumulator passage；
The current oil circuit system pressure of C pressure Sensor monitoring, when system pressure is less than setting pressure, goes to step D, works as system
When pressure is higher than setting pressure, step E is gone to；
D stops sending control to the electromagnetic priority valve of control electromagnetic switch valve core action when system pressure is less than setting pressure
Signal processed, system are opened with low pressure accumulator passage, and fluid enters low pressure accumulator by solenoid directional control valve, and system is stored by low pressure
Can device maintenance pressure stability；
E is more than preset value when system pressure, and control signal, electricity are sent to the solenoid directional control valve of control electromagnetic switch valve core action
Magnetic change-over valve core commutates, and the passage of system and low pressure accumulator ends, and the passage between low pressure accumulator and liquid case is opened, low
Remaining fluid returns to liquid case by this passage in pressure accumulator, and system maintains pressure stability by high pressure accumulator；
F. judged, if high-pressure pump is not stopped, repeat step C to E, if high-pressure pump is stopped, carries out step G；
G stops sending control signal, solenoid directional control valve valve core reset to control solenoid directional control valve, and low pressure accumulator is pumped out with hydraulic pressure
The passage of mouth is opened, and low pressure accumulator is turned on hydraulic pump outlet, and path ends between low pressure accumulator and liquid case.
A kind of 7. method for stabilizing voltage of hydraulic pump, it is characterised in that：Connect high pressure accumulator in oil circuit, low pressure accumulator, including
The solenoid directional control valve and pressure sensor of one spool and the second spool, high pressure accumulator is connected with hydraulic pump outlet oil circuit, low
Accumulator is pressed to be connected by solenoid directional control valve and hydraulic pump outlet oil circuit, voltage stabilizing control method comprises the following steps：
A oil circuits are opened, preset pressure value,
B does not send control signal to the electromagnetic priority valve of the first spool of control and the action of the second spool, first spool and
Second spool is failure to actuate, and hydraulic pump outlet fluid is opened with low pressure accumulator passage, path between low pressure accumulator and liquid case
Cut-off；
The current oil circuit system pressure of C pressure Sensor monitoring, when system pressure is less than setting pressure, goes to step D, works as system
When pressure is higher than setting pressure, step E is gone to；
D stops hair when system pressure is less than setting pressure to the electromagnetic priority valve of the first spool of control and the action of the second spool
Control signal is sent, the first spool of solenoid directional control valve and the second spool are all failure to actuate, and hydraulic pump outlet fluid leads to low pressure accumulator
Road is opened, and path ends between low pressure accumulator and liquid case, and fluid passes through the first spool liquid pass hole, the first spool and second respectively
Liquid passage is crossed between spool, the annular chamber outside the second spool enters low pressure accumulator, and system maintains pressure by low pressure accumulator
Stablize；
E is more than preset value when system pressure, and control letter is sent to the electromagnetic priority valve of control the first spool action by control system
Number, the first spool action, hydraulic pump outlet oil circuit ends with low pressure accumulator path, and fluid stops entering low pressure accumulator, is
System maintains pressure stability by high pressure accumulator, while sends control signal to the electromagnetic priority valve of control the second spool action, the
Two spools act, and passage is opened between low pressure accumulator and liquid case, and remaining fluid returns to liquid case in low pressure accumulator；
F. judged, if high-pressure pump is not stopped, repeat step C to E, if high-pressure pump is stopped, carries out step G；
G stops sending control signal to the solenoid directional control valve of the action of the first spool of control and control the second spool action, and described the
The passage of one spool and the second valve core reset, low pressure accumulator and hydraulic pump outlet is opened, low pressure accumulator and hydraulic pump outlet
Conducting, path ends between low pressure accumulator and liquid case.
Preferably, solenoid directional control valve is type pilot solenoid directional control valve.
A kind of 8. method for stabilizing voltage of hydraulic pump such as claim 6 or 7, it is characterised in that：Preferably, in above-mentioned steps F, on
Position machine carries out delay judgement.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046005A (en) * | 2022-06-24 | 2022-09-13 | 中国第一汽车股份有限公司 | Transmission hydraulic energy supply system and vehicle with same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265667Y (en) * | 2008-08-27 | 2009-07-01 | 山西金色阳光环保工程有限公司 | Self-holding vacuum reversal valve |
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 北京天地玛珂电液控制系统有限公司 | Large-flow safety valve test system |
| CN201407049Y (en) * | 2009-05-18 | 2010-02-17 | 浙江大学 | Energy-saving shield cutterhead closed-loop hydraulic control system adopting grouped energy accumulator |
| CN102635579A (en) * | 2012-05-04 | 2012-08-15 | 山东理工大学 | Energy-saving hydraulic system for loaders |
| CN204061361U (en) * | 2014-07-09 | 2014-12-31 | 北新集团建材股份有限公司 | Hydraulic system and Lightgage Steel Joist process equipment |
| CN204239353U (en) * | 2014-10-27 | 2015-04-01 | 潍柴动力股份有限公司 | A kind of road roller vibration energy regeneration reutilization system |
| CN106662130A (en) * | 2014-08-01 | 2017-05-10 | 株式会社神户制钢所 | Hydraulic drive device |
-
2017
- 2017-11-03 CN CN201711076454.7A patent/CN107906059B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265667Y (en) * | 2008-08-27 | 2009-07-01 | 山西金色阳光环保工程有限公司 | Self-holding vacuum reversal valve |
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 北京天地玛珂电液控制系统有限公司 | Large-flow safety valve test system |
| CN201407049Y (en) * | 2009-05-18 | 2010-02-17 | 浙江大学 | Energy-saving shield cutterhead closed-loop hydraulic control system adopting grouped energy accumulator |
| CN102635579A (en) * | 2012-05-04 | 2012-08-15 | 山东理工大学 | Energy-saving hydraulic system for loaders |
| CN204061361U (en) * | 2014-07-09 | 2014-12-31 | 北新集团建材股份有限公司 | Hydraulic system and Lightgage Steel Joist process equipment |
| CN106662130A (en) * | 2014-08-01 | 2017-05-10 | 株式会社神户制钢所 | Hydraulic drive device |
| CN204239353U (en) * | 2014-10-27 | 2015-04-01 | 潍柴动力股份有限公司 | A kind of road roller vibration energy regeneration reutilization system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046005A (en) * | 2022-06-24 | 2022-09-13 | 中国第一汽车股份有限公司 | Transmission hydraulic energy supply system and vehicle with same |
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