CN107676339B - A kind of high-pressure hydraulic pump test hydraulic system and test method - Google Patents
A kind of high-pressure hydraulic pump test hydraulic system and test method Download PDFInfo
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- CN107676339B CN107676339B CN201711076455.1A CN201711076455A CN107676339B CN 107676339 B CN107676339 B CN 107676339B CN 201711076455 A CN201711076455 A CN 201711076455A CN 107676339 B CN107676339 B CN 107676339B
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of high-pressure hydraulic pump test hydraulic system and test method.The hydraulic test system includes subject high-pressure hydraulic pump, Digital Pressure Regulating Valve, liquid case, high pressure accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control unit.The high-pressure and hydraulic pump discharge oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator is connected by accumulator switching device and subject high-pressure and hydraulic pump discharge oil circuit, and the oil liquid of the subject high-pressure pump discharge returns to liquid case after the Digital Pressure Regulating Valve tune.The Digital Pressure Regulating Valve plays a part of to adjust subject high-pressure and hydraulic pump discharge pressure, to verify performance of subject high-pressure hydraulic pump under the conditions of different pressures.
Description
Technical field
The present invention relates to a kind of hydraulic pump test hydraulic systems and test method, especially high-pressure hydraulic pump to test hydraulic pressure system
System and application method.
Background technique
With being constantly progressive for technical level, hydraulic pump nominal pressure constantly develops to high pressure direction, this is just to high pressure liquid
With hydraulic system, more stringent requirements are proposed for press pump test.
On the one hand, high-pressure hydraulic pump generallys use plunger-type structure at present, therefore often occurs pressure and stream in hydraulic system
Amount pulsation, can be reducing pulsation, but in high-pressure hydraulic pump performance test in such a way that hydraulic pump outlet connects accumulator
In, since high-pressure hydraulic pump nominal pressure is very high, in addition hydraulic pump delivery test will carry out impact test, this leads to entire oil
Liquid system pressure regulating range is very big, even up to 0-50Mpa.Pump test hydraulic system generallys use single accumulator now,
In high-voltage testing system, if charging pressure of accumulator is low, although can satisfy the regulatory requirements under system low-voltage state, in height
Under pressure condition, accumulator can be more than then loading range, damage greatly to accumulator, or even there are certain risk.Conversely, if storing
Energy device the blowing pressure is high, though can meet the regulatory requirements under system high pressure state, for system in low-pressure state, accumulator is not
The pressure and flow pulsation of energy good absorption high-pressure hydraulic pump, can cause certain impact to entire hydraulic system.
On the other hand, high-pressure and hydraulic pump power is larger, and corresponding matched power of motor is also big, is easy during startup
The phenomenon that existing startup power is insufficient, and pump can not start damages motor larger.This is just to the starting characteristic requirement of high-pressure hydraulic pump
It is higher.
In addition, needing to complete all kinds of delivery-inspection tests before hydraulic pump factory, need in zero-pressure to pump nominal pressure
In 125% pressure limit, properties test is completed, for high-pressure hydraulic pump, this pressure limit is far more than common liquid
The pressure regulation spectrum of press pump, just to the performance of pressure regulator valve, more stringent requirements are proposed for this, currently, hydraulic pressure system is used in hydraulic pump test
The pressure regulator valve that system uses, mostly uses the regulative mode of manual operation, automatic operation degree is low, and high-pressure hydraulic pump test process
In there are biggish security risks.
Though part pressure regulator valve can realize that remote auto is adjusted, structure is complicated, control accuracy difference is low, stability is poor, pressure regulation
Range is small, is not particularly suited for the drawbacks such as high-pressure hydraulic pump test.
In addition, the performance test of most of hydraulic pump will carry out impact test, i.e., by regulating system pressure, make its
The cyclically-varying of stipulated number is done in stipulated time, between nominal pressure and 0 pressure to detect the performance of hydraulic pump.Traditional
Means of testing needs access unloading valve in hydraulic system, and hydraulic system is relative complex, and traditional mechanical unloading valve, use
Manually adjust mode, the disadvantages such as tester's large labor intensity, test frequency are low, automatic operation degree is low.
Summary of the invention
The present invention provides a kind of high-pressure hydraulic pumps to test hydraulic system.The hydraulic test system includes subject high pressure liquid
Press pump, Digital Pressure Regulating Valve, liquid case, high pressure accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control
Portion.The hydraulic pump outlet oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator passes through accumulator switching device and liquid
Press pump exports oil circuit and connects.The oil liquid of the subject high-pressure pump discharge returns to liquid case after the Digital Pressure Regulating Valve tune.
Wherein the Digital Pressure Regulating Valve plays a part of to adjust subject high-pressure and hydraulic pump discharge pressure, to verify subject high pressure
Performance of hydraulic pump under the conditions of different pressures.
After wherein the subject high-pressure hydraulic pump is opened, pressure sensor monitoring oil circuit pressure, when pressure is less than preset value,
Oil liquid enters low pressure accumulator by accumulator switching device, maintains system pressure to stablize by low pressure accumulator, when pressure is greater than
Preset value, control unit control the accumulator switching device and switch over, and oil circuit and the low pressure accumulator channel are ended, by height
Press accumulator that system pressure is maintained to stablize.
Channel when accumulator switching device closes oil circuit and low pressure accumulator channel, between low pressure accumulator and liquid case
It opens, remaining oil liquid returns to liquid case by this channel in low pressure accumulator.
The test macro further includes driving motor, filter, cooler, pressure sensor, safety valve etc..It is tested high pressure
Hydraulic pump drives the imbibition from liquid case by driving motor, and subsequent oil circuit is entered after filter filters, and oil liquid enters liquid case
Preceding to cool down through subcooler, safety valve and pressure sensor are serially connected in oil circuit, the pressure sensor load monitoring system pressure
Power, the safety valve play the role of system overload protection.
Preferably, Digital Pressure Regulating Valve is pilot-type solenoid valve.
Control signal is sent by the electromagnetic priority valve to Digital Pressure Regulating Valve, the zero load that test macro may be implemented is opened
Dynamic, impact test.
Preferably, Digital Pressure Regulating Valve is driven using linear stepping motor.
Upper computer software sends control signal to the linear stepping motor, adjusts the stroke of straight-line electric arbor, adjusts
The cracking pressure of the electromagnetic priority valve, so that hydraulic system be made to reach different pressure ratings.
The Digital Pressure Regulating Valve is serially connected in subject high-pressure and hydraulic pump discharge, and control signal is sent to it by control unit,
In conjunction with PC control software, the automation control that the hydraulic system may be implemented and remotely control, to realize subject high pressure
The properties of hydraulic pump are tested.
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.
The present invention provides a kind of test method of high-pressure hydraulic pump, when the subject high-pressure and hydraulic pump startup, to number
The electromagnetic priority valve of formula pressure regulator valve sends signal, realizes that subject high-pressure hydraulic pump No Load Start, high-pressure hydraulic pump to be tested are complete
After starting, stop sending control signal to the electromagnetic priority valve of Digital Pressure Regulating Valve, and send its linear stepping motor and control
Signal, regulating system pressure, and be monitored by pressure sensor feedback, in conjunction with upper computer software, in upper computer software
A certain setting value is set, and when pressure is less than preset value, oil liquid enters low pressure accumulator by accumulator switching device, at this time system
Maintain system pressure to stablize by low pressure accumulator, when pressure is greater than preset value, control unit control the accumulator switching device into
Row switching, oil circuit and the low pressure accumulator channel are ended, and maintain system pressure to stablize by high pressure accumulator.
The present invention provides a kind of test methods of high-pressure hydraulic pump, which is characterized in that in method include pressure regulation step and
Pressure stabilizing step,
The pressure regulation step includes:
When A is tested hydraulic pump startup, control signal is sent to the electromagnetic priority valve of Digital Pressure Regulating Valve, hydraulic system is realized
No Load Start；
After system starts completely, stop sending control signal to the electromagnetic priority valve of Digital Pressure Regulating Valve；
Control signal is sent to the linear stepping motor of Digital Pressure Regulating Valve, the stroke of straight-line electric arbor is adjusted, changes
The decrement of guide's spring；The cracking pressure of Digital Pressure Regulating Valve pilot valve is adjusted, and then changes Digital Pressure Regulating Valve main valve
The cracking pressure of core adjusts subject high pressure pump outlet pressure；
Judge whether system pressure reaches required pressure, if not up to, sending linear stepping motor and controlling signal, carry out micro-
It adjusts.
The pressure stabilizing step includes:
B preset pressure value；
C does not send control signal to the electromagnetic priority valve that control electromagnetic switch valve core acts, and electromagnetic switch valve core is not
Movement, oil liquid and low pressure accumulator channel are opened；
The current oil circuit system pressure of D pressure sensor monitoring goes to step E when system pressure is lower than setting pressure, when
When system pressure is higher than setting pressure, step F is gone to；
E stops the electromagnetic priority valve hair acted to control electromagnetic switch valve core when system pressure is lower than setting pressure
Control signal is sent, system and low pressure accumulator channel are opened, and oil liquid enters low pressure accumulator by solenoid directional control valve, and system is by low
Press accumulator that pressure is maintained to stablize；
F is greater than preset value when system pressure, and the solenoid directional control valve acted to control electromagnetic switch valve core sends control letter
Number, the commutation of electromagnetic switch valve core, the channel cut-off of system and low pressure accumulator, the channel between low pressure accumulator and liquid case is beaten
It opens, remaining oil liquid returns to liquid case by this channel in low pressure accumulator, and system maintains pressure to stablize by high pressure accumulator；
G. judged, if tested high-pressure hydraulic pump does not stop working, repeat step D to F, if high-pressure hydraulic pump stops work
Make, stops sending electromagnetic switch valve control signal, electromagnetic switch valve core, system and low pressure accumulator channel are ended, and low pressure stores
It can be opened in channel between device and liquid case, the oil liquid remained in low pressure accumulator unloads liquid-return box；
Preferably, solenoid directional control valve is type pilot solenoid directional control valve.
Preferably, in above-mentioned steps G, host computer carries out delay judgement.
Wherein the high-pressure hydraulic pump test macro can also carry out the impact test of subject high-pressure hydraulic pump, step packet
It includes:
A sends control signal, regulating system pressure to subject high-pressure hydraulic pump nominal pressure to Digital Pressure Regulating Valve；
B is after pressure stabilisation, and pressure unloading is arranged and unloads and stops pressure value；
C sends control letter when system pressure meets or exceeds pressure unloading, to the electromagnetic priority valve of Digital Pressure Regulating Valve
Number, hydraulic system realizes off-load；
D when system pressure lower than unload stop pressure when, stop to Digital Pressure Regulating Valve electromagnetic priority valve send control signal,
System is in pressurized state；
E is sent when system pressure increases to high-pressure hydraulic pump nominal pressure to the electromagnetic priority valve of Digital Pressure Regulating Valve
Control signal, system unloaded；
F repeats the above steps C-E, controls signal until persistently sending by host computer to electromagnetic priority valve, system is in
Unloading condition, impact test stop.
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 include the first spool and the second spool, 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 to first cartridge outlet and the low pressure accumulator, and also there are connect with liquid case for second spool
The channel connect, this channel is ended under original state.First spool controls on-off, and second spool can will be in accumulator
Remaining liquid is laid down.When pressure is greater than preset value, control unit controls first spool and commutates so that oil circuit and the low pressure store
Can the cut-off of device channel, while the second spool commutates so that the channel between low pressure accumulator and liquid case is opened, residual in low pressure accumulator
The oil liquid deposited returns to liquid case by the second spool.
It is preferred that two spool strings use integral structure, it is connect by swivel nut with valve body.
It is preferred that be provided with stomata in the control valve core of the first spool, during the movement of thrust movable valve plug, inner cavity with
It crosses between liquid set and forms 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
High pressure accumulator, low pressure accumulator are connected in oil circuit, solenoid directional control valve and pressure including the first spool and the second spool pass
Sensor, high pressure accumulator and hydraulic pump outlet oil circuit are connected, and low pressure accumulator passes through solenoid directional control valve and hydraulic pump outlet oil circuit
Connect, pressure stabilizing control method the following steps are included:
A oil circuit is 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 movement of the second spool
Core and the second spool are failure to actuate, and hydraulic pump outlet oil liquid and low pressure accumulator channel are opened, between low pressure accumulator and liquid case
Access cut-off；
C pressure sensor monitors current oil circuit system pressure, when system pressure is lower than setting pressure, goes to step D, when
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 movement of the second spool when system pressure is lower 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 oil liquid and low pressure accumulation of energy
Device channel is opened, and access ends between low pressure accumulator and liquid case, and oil liquid passes through the first spool liquid pass hole respectively, the first spool and
Liquid channel 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 is stablized；
E is greater than preset value when system pressure, sends control by electromagnetic priority valve of the control system to control the first spool movement
Signal processed, the movement of the first spool, hydraulic pump outlet oil circuit and low pressure accumulator access end, and oil liquid stops entering low pressure accumulation of energy
Device, system maintain pressure to stablize by high pressure accumulator, while sending control letter to the electromagnetic priority valve of control the second spool movement
Number, the movement of the second spool, channel is opened between low pressure accumulator and liquid case, and remaining oil liquid returns to liquid case in low pressure accumulator；
F. judged, if tested high-pressure hydraulic pump does not stop working, repeat step C to E, if high-pressure hydraulic pump stops work
Make, carries out step G；
G stops sending control signal, institute to the solenoid directional control valve that the movement of the first spool of control and the second spool of control act
State the first spool and the second valve core reset, the channel opening of low pressure accumulator and hydraulic pump outlet, low pressure accumulator and hydraulic pump
Outlet conducting, access 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.
It for entire high-pressure hydraulic pump tests hydraulic system, builds simple, reliable, meets high pressure liquid well
Regulatory requirements and pressure regulation demand in press pump test process can realize oneself of entire high-pressure hydraulic pump test in conjunction with upper computer software
Dynamicization control, automatic degree are high, easy to operate.
The steady pressure of system scheme that high-low pressure accumulator switches in the present invention, by the accumulation of energy that two different pressures ranges are arranged
Device solves the problems, such as that single accumulator can not meet high-pressure hydraulic pump well and test hydraulic system testing demand, realizes low
Automatic cut-off and drainage of the accumulator in system high pressure state are pressed, to maintain pressure of the hydraulic system under different pressures state
Stablize.
The implementation of double spool, more compact structure are used in the present invention；If wherein some electromagnetic priority valve failure simultaneously,
Too big influence there will not be on system pressure stabilization, system stability is higher.Cutting automatically for valve can be realized using electromagnetic priority valve
It changes；Control valve core is provided with stomata, to guarantee the reliable sealing of spool and valve seat；Spool string uses the structure of integral plugged formula, tears open
Dress is convenient.
Pressure regulation scheme based on Digital Pressure Regulating Valve controls Digital Pressure Regulating Valve by host computer, realizes and is
The remote adjustment for pressure of uniting ensures tester's life security；Linear stepping motor control precision is high, and liquid can be achieved substantially
The stepless voltage regulation of pressure system；Control signal is sent by electromagnetic priority valve of the host computer to Digital Pressure Regulating Valve, it can be achieved that test
The No Load Start of system.Impact test can be realized by upper computer software, and realizes remote auto control.Digital Pressure Regulating Valve collection
The control of hydraulic pump No Load Start, system pressure are adjusted, impact test is implemented in one, and structure is simple.
Detailed description of the invention
Fig. 1 is that disclosure high-pressure hydraulic pump tests hydraulic system principle figure；
Fig. 2 is the structure diagram that disclosure high-pressure hydraulic pump tests hydraulic system Digital Pressure Regulating Valve；
Fig. 3 is that disclosure high-pressure hydraulic pump tests hydraulic system first embodiment method for stabilizing voltage flow chart；
Fig. 4 is the systematic schematic diagram that disclosure high-pressure hydraulic pump tests hydraulic system second embodiment；
Fig. 5 is that disclosure high-pressure hydraulic pump tests hydraulic system second embodiment method for stabilizing voltage flow chart；
Fig. 6 is the type pilot double spool solenoid directional control valve knot that disclosure high-pressure hydraulic pump tests hydraulic system second embodiment
Composition.
Appended drawing reference:
1- is tested high-pressure hydraulic pump；2- driving motor；3- filter；4- low pressure accumulator；5- type pilot solenoid directional control valve；
6- pressure sensor；7- high pressure accumulator；8- Digital Pressure Regulating Valve；9- cooler；10- safety valve；11- liquid case.
8-1- damping hole；8-2- main valve plug；8-3- main spring；8-4- electromagnetic priority valve；8-5- pilot valve；8-6- guide
Spring；8-7- guide's valve seat；8-8- linear stepping motor.
12 type pilot double spool solenoid directional control valves；The first spool of 12-1；The second spool of 12-2, it is dynamic that 12-3 controls the first spool
The electromagnetic priority valve of work；12-4 controls the electromagnetic priority valve of the second spool movement；
21 second spool swivel nuts；22 second valve core valve stems；23 second spool valve seats；24 springs；25 second spools cross liquid set；
26 first spool control valve cores；27 first spool swivel nuts；28 electromagnetic priority valves；29 electromagnetic priority valve filters；30 first spools
Valve rod；31 screws；32 first spool valve seats；41 second spool valve pocket liquid pass holes；42 second valve core valve stem liquid pass holes；43 first valves
Core swivel nut liquid pass hole；44 first valve core valve stem liquid pass holes；45 first spool stomatas；
51 second spool spool strings；52 second spool spool strings；
Specific 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 description, it is clear that described embodiment is only disclosure a part of the embodiment, instead of all the embodiments.It is based on
Embodiment in the disclosure, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of disclosure protection.
Embodiment 1
Fig. 1 is the schematic diagram of hydraulic pump test macro of the present invention, mainly includes: 1- is tested high-pressure hydraulic pump；2- drives
Dynamic motor；3- filter；4- low pressure accumulator；5- type pilot solenoid directional control valve；6- pressure sensor；7- high pressure accumulator；8-
Digital Pressure Regulating Valve；9- cooler；10- safety valve；11- liquid case.
Driving motor 2 drives the subject imbibition from liquid case 11 of high-pressure hydraulic pump 1, and oil liquid is through 3 Digital Pressure Regulating Valve 8 of filter
After cooler 9, liquid case is come back to；A high pressure accumulator 7 in parallel and a low pressure accumulation of energy in the outlet of subject high-pressure hydraulic pump 1
Device 4 wherein concatenates a type pilot solenoid directional control valve 5 before low pressure accumulator 4；It is taken over simultaneously in the outlet of subject high-pressure hydraulic pump 1
Filter 3, sensor 6 and safety valve 10.
Wherein filter filters oil liquid, pressure sensor feedback system pressure, and cooperation upper computer software realizes oneself of system
Dynamicization control, cooler carry out oil liquid cooling, and safety valve plays the overload protection of carry out system.
As the hydraulic system pressure regulating process of this test of Fig. 1 and Fig. 2 is as follows: when hydraulic system starting, driving motor 2 drives quilt
High-pressure hydraulic pump 1 is tried from 11 imbibition of liquid case, at this point, sending control signal, electromagnetism to electromagnetic priority valve 8-4 by upper computer software
The spool of pilot valve 8-4 commutates, and oil liquid enters main valve plug 8-2 ante-chamber by filter 3, and herein, fraction oil liquid passes through damping
Hole 8-1, liquid case is returned to through electromagnetic priority valve 8-4, at this point, the upper cavity pressure of main valve plug 8-2 is almost 0, due to main spring 8-3's
Spring rate is lower, and main valve plug 8-2 is opened under very light pressure, realizes the No Load Start of system, prevents subject high pressure
Hydraulic pump 1 causes not starting, causes greater impact to motor and power grid, and realize zero load and open because of startup power deficiency
Dynamic remote auto control.
After being tested the starting completely of high-pressure hydraulic pump 1, stop sending control signal to electromagnetic priority valve 8-4, spool is multiple
Position, then acts on the front end pilot valve 8-5 by the oil liquid of damping hole 8-1, overcomes the spring force of guide's spring 8-6, return to liquid
Case can form pressure difference, the pressure of main valve plug 8-2 epicoele in main valve plug 8-2 upper and lower cavity since the pressure loss of damping hole 8-1 acts on
Power is less than lower cavity pressure, and main valve plug 8-2 is opened under the action of pressure difference, and oil liquid returns to liquid case 11 after cooler 9 is cooling.Straight line
The motor shaft front end of stepper motor 8-8 is connected by guide's valve seat 8-7 with guide's spring 8-6, by upper computer software to straight line
Stepper motor 8-8 sends control signal, quantitatively controls the stroke of its motor shaft, changes the decrement of guide's spring 8-6, in turn
The cracking pressure for having adjusted pilot valve 8-5 changes the pressure value for acting on main valve plug 8-2 epicoele, also changes main valve plug
The cracking pressure of 8-2, system pressure size change correspondingly, and show the system collected of pressure sensor 6 by upper computer software
Pressure value, to judge whether system pressure has reached required numerical value, if not up to, continuing through host computer and sending straight line step
Signal is controlled into motor 8-8, carries out system pressure fine tuning, until system pressure reaches required pressure.
This test macro impact test realizes that process is as follows:
By control linear stepping motor 8-8 regulating system pressure to the nominal pressure for being tested high-pressure hydraulic pump 1, lead at this time
It crosses host computer and sends electromagnetic priority valve 8-4 control signal, so that its spool is commutated, main valve plug 8-2 epicoele and liquid case 11 are connected, pressure
It is zero, main valve plug 8-2 is acted upwards under differential pressure action, and system pressure is gradually to zero-pressure, to 6 feedback system pressure of pressure sensor
After power is down to zero-pressure, in conjunction with upper computer software, stops sending electromagnetic priority valve 8-4 control signal, make its valve core reset, part oil
Liquid enters main valve plug 8-2 epicoele, and since cavity area is greater than lower cavity area on main valve plug 8-2, main valve plug 8-2 is in pressure difference and spring force
It is gradually resetted under effect, system pressure gradually rises, when pressure sensor 6 detects that system pressure reaches subject high-pressure hydraulic pump
When 1 nominal pressure, pilot valve 8-5 is opened under pressure, and system pressure tops out, maintenance is stablized, at this point, passing through
Upper computer software sends control signal to electromagnetic priority valve 8-4, loops back and forth like this, and realizes the impact of subject high-pressure hydraulic pump 1
Test.
Such as Fig. 1 and Fig. 3, this test macro is as follows with pressure stabilizing process: subject high-pressure hydraulic pump 1 starts, and system is in zero load
Preset pressure value is arranged in starting state in upper computer software, at this time electromagnetic pilot of the host computer to type pilot solenoid directional control valve 5
Valve does not send control signal, and oil liquid enters low pressure accumulator 4 by type pilot solenoid directional control valve 5, though high pressure accumulator 7 one is direct
It is logical, but since its blowing pressure height, system pressure can't make its air bag that biggish deflection occur, system is due to pressure at this time
It is low, pressure stabilization function is realized by the low low pressure accumulator 4 of the blowing pressure.Thereafter circulation is judged in software, when system pressure
When power is lower than setting pressure, control signal is not sent to the electromagnetic priority valve of type pilot solenoid directional control valve 5, system is still by filling still
Atmospheric pressure low low pressure accumulator 4 realizes pressure stabilization function；When system pressure is greater than setup pressure value, host computer is to type pilot
The electromagnetic priority valve of solenoid directional control valve 5 sends control signal, and the channel of spool commutation, system to low pressure accumulator 4 is ended, together
When low pressure accumulator 4 and liquid case between channel open, the oil liquid remained in low pressure accumulator 4 returns to liquid case by this channel,
At this point, pump discharge and low pressure accumulator 4 end, system maintains pressure to stablize by high pressure accumulator 7.In upper computer software slightly
Delay, continues to judge, if tested high-pressure hydraulic pump 1 stops working, host computer stops the electricity to type pilot solenoid directional control valve 5
Magnetic pilot valve sends control signal, if tested high-pressure hydraulic pump 1 does not stop working, return continues cycling through judgement system pressure value
The relationship between preset pressure value.
Embodiment 2
Referring to fig. 4, the other connection relationships 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 hydraulic pump 1, outlet
The entrance of low pressure accumulator 4 and the second spool 12-2, the outlet the second spool 12-2 are then connected to liquid case 11.Wherein the first spool is responsible for
On-off, the second spool return to the liquid in low pressure accumulator in liquid case.
Its hydraulic pump test macro pressure stabilizing scheme is realized using following pressure stabilizing scheme, in conjunction with its control flow of upper computer software
It is as shown in Figure 5:
Subject high-pressure hydraulic pump 1 first starts, and system is in No Load Start state, and default pressure is arranged in upper computer software
Force value controls type pilot double spool solenoid directional control valve 12 electromagnetic priority valve 12-3 and the control second of the movement of first spool at this time
The electromagnetic priority valve 12-4 of spool movement does not send control signal, and the first spool 12-1 and the second spool 12-2 are failure to actuate, oil
Liquid 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 biggish deflection occur, and system is played by the low low pressure accumulator 4 of the blowing pressure at this time
Steady pressure of system effect.Thereafter circulation is judged in software, and when system pressure is lower than setup pressure value, host computer is to guide
Type double spool solenoid directional control valve 12 controls the electromagnetic priority valve 12-3 of the first spool movement and the electromagnetism of control the second spool movement
Pilot valve 12-4 does not send control signal still, and system still realizes pressure stabilization function by the low low pressure accumulator 4 of the blowing pressure；
When system pressure meets or exceeds preset pressure value, controlled by upper computer software to type pilot double spool solenoid directional control valve 12
The electromagnetic priority valve 12-3 of first spool movement and the electromagnetic priority valve 12-4 of control the second spool movement send control signal, the
One spool 12-1 commutation, system to 4 channel of low pressure accumulator are ended, while the second spool 12-2 commutates, residual in low pressure accumulator 4
The oil liquid deposited returns to liquid case by the second spool 12-2, at this point, low pressure accumulator 4 ends, system is maintained to press by high pressure accumulator 7
Power is stablized.It is slightly delayed in upper computer software, continues to judge, if tested high-pressure hydraulic pump 1 stops working, host computer stops
Control signal only is sent to the electromagnetic priority valve of type pilot solenoid directional control valve 55, if tested high-pressure hydraulic pump 1 does not stop working,
Return, which continues cycling through, judges relationship between system pressure value and preset pressure value.
Wherein double spool electromagnetic switch valve arrangement is as indicated with 6.
First spool spool string 51 and the second spool spool string 52 use integral structure, are connected by screw 31, and lead to
Swivel nut is crossed to connect with valve body, it is convenient for disassembly and assembly.Two electromagnetic priority valve designs constitute electromagnetic priority valve 28 in a valve block.
When system works, P mouthfuls are connected with subject high-pressure and hydraulic pump discharge, and when system is in low-pressure state, oil liquid passes through P
Mouthful, enter low pressure accumulator through the first valve core valve stem liquid pass hole 44, the first spool swivel nut liquid pass hole 43, channel A, system is by low pressure
Accumulator maintains pressure to stablize.Electromagnetic priority valve 28 is given at this time when system pressure is higher than setting pressure in conjunction with upper computer software
Two electromagnet send control signal simultaneously, P mouthful of oil liquid, through the entrance electromagnetic priority valve 28 of electromagnetic priority valve filter 29,
And control mouth K1 and K2 are respectively enterd after electromagnetic priority valve commutates, wherein K1 mouthfuls of oil liquid acts on into control chamber here
On the annular end face of one spool control valve core, 26 lower end control chamber, active force, which is greater than, to be acted in the first spool control valve core 26
The active force of annular end face is held, pushes the movement upwards of the first spool control valve core 26, and be pressed on the first valve seat 32, here the
One spool control valve core 26 is provided with stomata 45, to prevent control during pushing the first 26 movement upwards of spool control valve core
It makes and forms closed air cavity between 26 inner cavity of the first spool control valve core and the first valve core valve stem 30, and cause the first spool control valve
Core 26 can not be pressed on the first spool valve seat 32, make P mouthfuls can not reliably end with low pressure accumulator.P mouthfuls and the first valve at this time
Core swivel nut liquid pass hole 43 ends, and oil liquid cannot be introduced into low pressure accumulator；K2 mouthfuls of control liquid simultaneously, acts on the second valve core valve stem
22 control terminal, the second valve core valve stem 22 overcome the spring force of spring 24, so that the second valve pocket liquid pass hole 41 and the second spool valve
Bar liquid pass hole 42 is connected, and remaining oil liquid passes through A mouthfuls, the second valve pocket liquid pass hole 41 and the second valve core valve stem mistake in low pressure accumulator
Fluid apertures 42 is connected, and returns to liquid case through T mouthfuls, and system maintains pressure to stablize by high pressure accumulator at this time.When system pressure is lower than setting
When pressure, then stop sending control signal to electromagnetic priority valve 28, K1 and K2 mouthful exist without liquid, the first spool control valve core 26 is controlled
It is resetted under the action of P mouthfuls of pressure, the P mouthfuls of channels between low pressure accumulator are opened, while the second valve core valve stem 22 is in spring force
Under the action of, it is pressed against on the second spool valve seat 23, ends low pressure accumulator with T mouthfuls of channels, system is again by low pressure accumulation of energy
Device maintains pressure to stablize.
It uses in embodiment two and is the advantages of bivalve cored structure: if the electromagnetic priority valve event of control the first spool movement
Barrier, when system pressure is greater than setting pressure, the electromagnetic priority valve that control unit is acted to the first spool of control and 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 movement at this time, second
Spool commutation opens low pressure accumulator and liquid case channel, and the high-voltage oil liquid from hydraulic pump returns to liquid by this channel at this time
Case realizes protection to low pressure accumulator；If the electromagnetic priority valve failure of the second spool movement is controlled, when system pressure is greater than
When setting pressure, the electromagnetic priority valve that control unit is acted to the first spool of control and the second spool sends control signal simultaneously, the
The commutation of one spool ends hydraulic pump outlet oil circuit and low pressure accumulator channel, and system plays pressure stabilization function by high pressure accumulator,
The electromagnetic priority valve failure that second spool is acted due to the second spool of control at this time, and be failure to actuate, low pressure accumulator is straight with liquid case
The channel connect can not open, so that a part of oil liquid can be remained in low pressure accumulator, when system pressure is lower than setting value or system
When stopping working, control unit stops sending control signal to the electromagnetic priority valve that the first spool of control and the second spool act, the
One valve core reset, the channel conductive of low pressure accumulator and hydraulic pump outlet oil circuit, the oil liquid remained in low pressure accumulator pass through
System unloads oil return box；
Embodiment of above is only suitable for illustrating the disclosure, and is not the limitation to the disclosure, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the disclosure, therefore all
Equivalent technical solution also belongs to the scope of the disclosure, and the scope of patent protection of the disclosure should be defined by the claims.
Claims (9)
1. a kind of high-pressure hydraulic pump test macro, which is characterized in that the test macro includes subject high-pressure hydraulic pump, digital
Pressure regulator valve, liquid case, high pressure accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control unit；The high pressure liquid
Press pump outlet oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator passes through accumulator switching device and subject high-pressure and hydraulic
Pump discharge oil circuit is connected, and the oil liquid of the subject high-pressure hydraulic pump discharge returns to liquid after the Digital Pressure Regulating Valve concatenated
Case；
The Digital Pressure Regulating Valve adjusts subject high-pressure and hydraulic pump discharge pressure, with verifying subject high-pressure hydraulic pump in different pressures
Under the conditions of performance；
After the subject high-pressure hydraulic pump is opened, pressure sensor monitoring oil circuit pressure, when pressure is less than preset value, oil liquid passes through
Accumulator switching device enters low pressure accumulator, maintains system pressure to stablize by low pressure accumulator, when pressure is greater than preset value, control
Portion processed controls the accumulator switching device and switches over, and oil circuit and the low pressure accumulator channel are ended, by high pressure accumulator
System pressure is maintained to stablize.
2. high-pressure hydraulic pump test macro as described in claim 1, it is characterised in that: the Digital Pressure Regulating Valve is type pilot
Solenoid valve is driven using linear stepping motor, by sending control signal to the linear stepping motor, is adjusted digital
The cracking pressure of pressure regulator valve makes hydraulic system reach different pressure ratings.
3. high-pressure hydraulic pump test macro as described in claim 1, it is characterised in that: the accumulator switching device is guide
Type solenoid directional control valve.
4. high-pressure hydraulic pump test macro as described in claim 1, it is characterised in that: high pressure accumulator preacceleration inflation force value is
30-40MPa, low pressure accumulator preacceleration inflation force value are 15-25Mpa.
5. the high-pressure hydraulic pump test macro as described in one of claim 1-4, it is characterised in that: further include driving motor, mistake
Filter, cooler, pressure sensor, safety valve, the subject high-pressure hydraulic pump are passed through by driving motor imbibition from liquid case
Enter subsequent oil circuit after filter filtering, oil liquid cools down before entering liquid case through subcooler, safety valve and pressure sensor concatenation
In oil circuit, the pressure sensor load monitoring system pressure, the safety valve plays the role of system overload protection.
6. the high-pressure hydraulic pump test macro as described in one of claim 1-4, it is characterised in that: the accumulator switching device
For the solenoid valve of bivalve cored structure, including the first spool and the second spool, first cartridge inlet and hydraulic pump outlet oil circuit
Connect, the second cartridge inlet and the low pressure accumulator described in outlet, second cartridge inlet then with first valve
Core outlet is connected to the low pressure accumulator.
7. a kind of test method of high-pressure hydraulic pump test macro, the test macro includes subject high-pressure hydraulic pump, digital
Pressure regulator valve, liquid case, high pressure accumulator, low pressure accumulator, accumulator switching device, pressure sensor, control unit；The hydraulic pump
Outlet oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator is pumped out by accumulator switching device and subject high-pressure and hydraulic
Mouth oil circuit is connected, and the oil liquid of the subject high-pressure pump discharge returns to liquid case after the Digital Pressure Regulating Valve tune concatenated；
It is characterized by: signal is sent to the electromagnetic priority valve of Digital Pressure Regulating Valve when the subject high-pressure and hydraulic pump startup, it is real
It is now tested high-pressure hydraulic pump No Load Start, after being tested high-pressure hydraulic pump and starting completely, stops the electromagnetism to Digital Pressure Regulating Valve
Pilot valve sends control signal, and sends control signal, regulating system pressure to its linear stepping motor, and pass through pressure sensing
Device feedback is monitored, in conjunction with upper computer software, a certain setting value is set in upper computer software, when pressure be less than preset value,
Oil liquid enters low pressure accumulator by accumulator switching device, and system maintains system pressure to stablize by low pressure accumulator at this time, when
Pressure is greater than preset value, and control unit controls the accumulator switching device and switches over, oil circuit and the low pressure accumulator channel
Cut-off maintains system pressure to stablize by high pressure accumulator.
8. a kind of test method of high-pressure hydraulic pump test macro, the test macro includes subject high-pressure hydraulic pump, digital
Pressure regulator valve, liquid case, high pressure accumulator, low pressure accumulator, solenoid directional control valve, pressure sensor, control unit；The high-pressure hydraulic pump
Outlet oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator is connected by solenoid directional control valve and hydraulic pump outlet oil circuit,
The oil liquid of the subject high-pressure pump discharge returns to liquid case after the Digital Pressure Regulating Valve concatenated；
It is characterized by comprising pressure regulation step and pressure stabilizing step,
The pressure regulation step includes:
When A is tested hydraulic pump startup, control signal is sent to the electromagnetic priority valve of Digital Pressure Regulating Valve, hydraulic system is realized unloaded
Starting；
After system starts completely, stop sending control signal to the electromagnetic priority valve of Digital Pressure Regulating Valve；
Control signal is sent to the linear stepping motor of Digital Pressure Regulating Valve, the stroke of straight-line electric arbor is adjusted, changes guide
The decrement of spring；The cracking pressure of Digital Pressure Regulating Valve pilot valve is adjusted, and then changes Digital Pressure Regulating Valve main valve plug
Cracking pressure adjusts subject high pressure pump outlet pressure；
Judge whether system pressure reaches required pressure, if not up to, sending linear stepping motor and controlling signal, be finely adjusted；
The pressure stabilizing step includes:
B preset pressure value；
C does not send control signal to the electromagnetic priority valve that control electromagnetic switch valve core acts, and electromagnetic switch valve core is failure to actuate,
Oil liquid and low pressure accumulator channel are opened；
The current oil circuit system pressure of D pressure sensor monitoring goes to step E, works as system when system pressure is lower than setting pressure
When pressure is higher than setting pressure, step F is gone to；
E stops sending control to the electromagnetic priority valve that control electromagnetic switch valve core acts when system pressure is lower than setting pressure
Signal processed, system and low pressure accumulator channel are opened, and oil liquid enters low pressure accumulator by solenoid directional control valve, and system is stored by low pressure
Energy device maintains pressure to stablize；
F is greater than preset value when system pressure, and the solenoid directional control valve acted to control electromagnetic switch valve core sends control signal, electricity
The channel of the commutation of magnetic change-over valve core, system and low pressure accumulator is ended, and the channel between low pressure accumulator and liquid case is opened, low
Remaining oil liquid returns to liquid case by this channel in pressure accumulator, and system maintains pressure to stablize by high pressure accumulator；
G is judged, if tested high-pressure hydraulic pump does not stop working, is repeated step D to F, if high-pressure hydraulic pump stops working, is stopped
Only send electromagnetic switch valve control signal, electromagnetic switch valve core, system and low pressure accumulator channel are ended, low pressure accumulator with
Channel is opened between liquid case, and the oil liquid remained in low pressure accumulator unloads liquid-return box；
Solenoid directional control valve is type pilot solenoid directional control valve；
In above-mentioned steps G, host computer carries out delay judgement.
9. a kind of test method of high-pressure hydraulic pump test macro, the test macro includes subject high-pressure hydraulic pump, digital
Pressure regulator valve, liquid case, high pressure accumulator, low pressure accumulator, solenoid directional control valve, pressure sensor, control unit；The high-pressure hydraulic pump
Outlet oil circuit simultaneously connects the high pressure accumulator, and the low pressure accumulator is connected by solenoid directional control valve and hydraulic pump outlet oil circuit,
The oil liquid of the subject high-pressure pump discharge returns to liquid case after the Digital Pressure Regulating Valve concatenated；The solenoid directional control valve includes
First spool and the second spool, first cartridge inlet and hydraulic pump outlet oil circuit are connected, the second spool described in outlet
Entrance and the low pressure accumulator, second cartridge inlet then connect with first cartridge outlet and the low pressure accumulator
It is logical；
It is characterized by comprising pressure regulation step and pressure stabilizing step,
The pressure regulation step includes:
When A is tested hydraulic pump startup, control signal is sent to the electromagnetic priority valve of Digital Pressure Regulating Valve, hydraulic system is realized unloaded
Starting；
After system starts completely, stop sending control signal to the electromagnetic priority valve of Digital Pressure Regulating Valve；
Control signal is sent to the linear stepping motor of Digital Pressure Regulating Valve, the stroke of straight-line electric arbor is adjusted, changes guide
The decrement of spring；The cracking pressure of Digital Pressure Regulating Valve pilot valve is adjusted, and then changes Digital Pressure Regulating Valve main valve plug
Cracking pressure adjusts subject high pressure pump outlet pressure；
Judge whether system pressure reaches required pressure, if not up to, sending linear stepping motor and controlling signal, be finely adjusted；
The wherein pressure stabilizing step are as follows:
A preset pressure value,
B does not send control signal to the electromagnetic priority valve of the first spool of control and the movement of the second spool, first spool and
Second spool is failure to actuate, and hydraulic pump outlet oil liquid and low pressure accumulator channel are opened, access between low pressure accumulator and liquid case
Cut-off；
C pressure sensor monitors current oil circuit system pressure, when system pressure is lower 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 to the electromagnetic priority valve of the first spool of control and the movement of the second spool when system pressure is lower than setting pressure
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 oil liquid and low pressure accumulator are logical
Road is opened, and access ends between low pressure accumulator and liquid case, and oil liquid passes through the first spool liquid pass hole, the first spool and second respectively
Liquid channel 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 greater than preset value when system pressure, sends control letter by electromagnetic priority valve of the control system to control the first spool movement
Number, the movement of the first spool, hydraulic pump outlet oil circuit and low pressure accumulator access end, and oil liquid stops entering low pressure accumulator, are
System maintains pressure to stablize by high pressure accumulator, while sending control signal to the electromagnetic priority valve of control the second spool movement, the
The movement of two spools, channel is opened between low pressure accumulator and liquid case, and remaining oil liquid returns to liquid case in low pressure accumulator；
F is judged, if high-pressure hydraulic pump does not stop working, is repeated step C to E, if high-pressure hydraulic pump stops working, is walked
Rapid G；
G stops sending control signal to the solenoid directional control valve that the movement of the first spool of control and the second spool of control act, and described the
The channel 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, access ends between low pressure accumulator and liquid case；
Solenoid directional control valve is type pilot solenoid directional control valve；
In above-mentioned steps F, host computer carries out delay judgement.
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| CN108672910A (en) * | 2018-08-01 | 2018-10-19 | 长春三友汽车部件制造有限公司 | A kind of pressure between mash welder and its electrode controls automatic switchover system |
| CN110081037B (en) * | 2019-03-22 | 2020-06-05 | 中国煤炭科工集团太原研究院有限公司 | Automatic and rapid voltage stabilizing device with self-checking function for energy accumulator and using method |
| CN111076907A (en) * | 2019-11-28 | 2020-04-28 | 宁波拓普智能刹车系统有限公司 | Device for testing sealing performance, pressure resistance and opening pressure of automobile electromagnetic valve |
| CN112412927B (en) * | 2020-10-27 | 2022-08-23 | 温州大学 | Hydraulic element impact fatigue test bench |
| CN112881453A (en) * | 2021-01-27 | 2021-06-01 | 山东大学 | Solid-liquid phase change heat storage type power generation testing device and working method thereof |
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Address after: 101399 No.27, Linhe Development Zone, Shunyi District, Beijing Patentee after: Beijing Tianma Zhikong Technology Co.,Ltd. Patentee after: Beijing coal technology Tianma Automation Technology Co., Ltd Address before: 100013, Beijing, Chaoyang District, Hepingli Youth ditch East Road, building 5, one floor Patentee before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Patentee before: Beijing coal technology Tianma Automation Technology Co., Ltd |