CN108266362A - constant pressure pump test platform and test method - Google Patents
constant pressure pump test platform and test method Download PDFInfo
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- CN108266362A CN108266362A CN201711480143.7A CN201711480143A CN108266362A CN 108266362 A CN108266362 A CN 108266362A CN 201711480143 A CN201711480143 A CN 201711480143A CN 108266362 A CN108266362 A CN 108266362A
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- constant pressure
- pressure pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention provides a kind of constant pressure pump test platform, it be used to detect constant pressure pump, including synchronous belt, motor, loading circuit, transmission shaft one, transmission shaft two and fuel tank, loading circuit includes accompanying examination motor and proportional pressure control valve, motor and constant pressure pump are arranged on transmission shaft one, and examination motor is accompanied to be arranged on transmission shaft two；Transmission shaft one is connect by synchronous belt with transmission shaft two, inlet port and oil return opening are provided on fuel tank, inlet port is divided into two-way after being connect by pipeline with constant pressure pump, the import of proportional pressure control valve is connected all the way, the import of examination motor is accompanied in another way connection, and the outlet of proportional pressure control valve is with accompanying the outlet of examination motor to be connect again with oil return opening after connecting；The present invention also provides a kind of constant pressure pump test method, examination motor is accompanied to absorb most of flow of constant pressure pump output, will flow through that accompany the hydraulic energy transfer of examination motor fluid be kinetic energy, again constant pressure pump is passed to, realizes energy regenerating, the present invention is simple and convenient, it can complete to detect by controller, it is easy to operate.
Description
Technical field
The present invention relates to a kind of test method of constant pressure pump, more specifically to a kind of constant pressure pump test platform and test
Method.
Background technology
Constant pressure pump is a kind of hydraulic pump with pressure compensation, and constant pressure pump is in constant current operating mode, the flow of constant pressure pump
It remains unchanged；Into after pressure compensation operating mode, constant pressure pump flow according to needed for system adjusts its flow value.It is permanent specified in national standard
Press pump test method is loaded by throttle valve, and hydraulic energy transfer all by throttle valve, is thermal energy, made by constant pressure pump output flow
Into the waste of energy.Flow rate pressure gain of the constant pressure pump in constant pressure operating mode is larger, is difficult to obtain energy by overflow valve loading
Enough reflect each flow operating point of constant pressure pump performance.Being emptied in hydraulic system can cause cavitation, and cavitation can be to liquid
Pressure element causes to damage, and influences component life.
Therefore, it is necessary to the prior art is improved.
Invention content
It is an object of the invention to overcome defect of the existing technology, propose a kind of efficient constant pressure pump test platform and
Test method.
In order to solve the above technical problems, the present invention provides a kind of constant pressure pump test platform, be used to detect constant pressure pump, including
Synchronous belt, motor, loading circuit, transmission shaft one, transmission shaft two and fuel tank；
The loading circuit includes accompanying examination motor and proportional pressure control valve；The motor and constant pressure pump are arranged on transmission shaft one
On；It is described that examination motor is accompanied to be arranged on transmission shaft two；Transmission shaft one is connect by synchronous belt with transmission shaft two；
Inlet port and oil return opening are provided on the fuel tank；The inlet port is divided into two after being connect by pipeline with constant pressure pump
Road, connects the import of proportional pressure control valve all the way, and the import of examination motor is accompanied in another way connection；The outlet of the proportional pressure control valve is with accompanying
It is connect again with oil return opening after the outlet connection of examination motor.
As the improvement to constant pressure pump test platform of the present invention：Further include measuring cell；The measuring cell includes pressure
Sensor one, pressure sensor two, flowmeter and rotational speed and torque instrument；The rotational speed and torque instrument is arranged on transmission shaft one；It is described
Pressure sensor two is arranged on the pipeline between inlet port and constant pressure pump；The outlet of the constant pressure pump is passed by pipeline and pressure
Sensor one and flowmeter are divided into two-way after being sequentially connected.
It is further improved as to constant pressure pump test platform of the present invention：Further include controller；The controller and driving
Element accompanies examination motor, proportional pressure control valve, pressure sensor one, pressure sensor two, flowmeter and the electrical connection of rotational speed and torque instrument.
It is further improved as to constant pressure pump test platform of the present invention：The motor is variable-frequency motor.
The present invention also provides a kind of test methods of constant pressure pump, include the following steps：
1), in the controller setting accompany examination the initial flow of motor, the initial pressure set value of proportional pressure control valve, threshold value and
Steady state value sets the pressure of constant pressure operating mode in constant pressure pump, opens driving element, and driving element drives transmission shaft one to rotate, and drives
Dynamic constant pressure pump work；Rotational speed and torque instrument detects the velocity of rotation of transmission shaft one, and the physical quantity measured is converted into electric signal transmission
To controller；
2), after constant pressure pump work, the fluid in fuel tank is extracted out by inlet port, fluid flows after pressure sensor two
Enter constant pressure pump, fluid is flowed out from the outlet of constant pressure pump later, is divided into two-way after pressure sensor one and flowmeter；Pressure passes
Sensor two measures the pressure for the fluid that constant pressure pump is flowed into from inlet port, and as test pressure, pressure sensor one is measured from constant pressure
The pressure of the fluid of pump discharge outflow；The flow of fluid that flowmeter measurement goes out from constant pressure pump outlet flow, the stream as constant pressure pump
Amount；The physical quantity measured is converted into electric signal transmission to controller by pressure sensor one, pressure sensor two and flowmeter；
3), fluid is divided into two-way, wherein examination motor is accompanied to drive two turns of transmission shaft through accompanying examination motor on transmission shaft two all the way
Dynamic, transmission shaft two drives transmission shaft one to rotate by transmission belt, drives constant pressure pump work, adjusts the output power of driving element,
Dump power needed for from driving element to transmission shaft input constant pressure pump constant rotation, makes constant pressure pump obtain enough input powers,
Fluid another way flows through proportional pressure control valve；Later one is accumulated from proportional pressure control valve and from the fluid for the outlet outflow for accompanying examination motor
Fuel tank is flowed back in road from oil return opening；
4), start detection during fluid flows, with test pressure from initial pressure 0 to constant pressure pump constant pressure operating mode
Pressure is divided into n etc. points as test point；Test pressure is controlled by proportional pressure control valve by controller at this time, makes test pressure
It is begun to ramp up from initial pressure 0；Constant pressure pump is constant current operating mode at this time, and the part oil liquid stream of the outlet outflow of constant pressure pump, which is crossed, accompanies examination horse
It reaches, another part fluid flows through proportional pressure control valve；The flow tracking control of examination motor starting is accompanied in controller control, makes to accompany examination motor
Input flow rate subtracts steady state value for the flow of constant pressure pump, and the input flow rate of proportional pressure control valve is steady state value at this time；Controller later
The flow of the constant pressure pump of each test point is monitored by flowmeter, if the constant pressure pump of a test point and a upper test point
Flow difference higher than threshold value, then controller is using the test point as inflection point, accompanies and tries motor and no longer receive flow tracking control, and
And constant pressure pump terminates constant current operating mode；Controller, which is recorded to turn our controller and be conveyed to, accompanies the flow of examination motor as accompanying examination motor
The flow value of flowmeter when inflection point flow and controller record inflection point；
5), constant pressure pump enters constant pressure operating mode later, and whole fluid of the outlet outflow of constant pressure pump, which flow through, accompanies examination motor, does not flow
Proportional pressure control valve is crossed, examination motor is accompanied to absorb whole flows from constant pressure pump, the flow of constant pressure pump is to accompany examination motor at this time
Flow；The flow of examination motor is accompanied by controller reduction, so as to reduce the flow of constant pressure pump, test pressure is with constant pressure pump at this time
The reduction of flow and rise；Until accompanying the flow of examination motor until 0, the flow of constant pressure pump is also reduced to zero, and test pressure
Power reaches the pressure of constant pressure pump constant pressure operating mode；
6), after the pressure of test pressure arrival constant pressure pump constant pressure operating mode, the flow arrival minimum flow 0 of constant pressure pump, lead to
The flow that examination motor is accompanied in controller rising is crossed, so as to rise the flow of constant pressure pump, test pressure is with the flow of constant pressure pump at this time
Rise and decline；The minimum flow 0 of examination motor to be accompanied to be divided into several deciles to the inflection point flow for accompanying examination motor and work as flow
Point；In each flow operating point, controller control test pressure stops some time, treats pressure sensor one, pressure sensor
Two and the data stabilization that shows of flowmeter after record；
7), when the flow for accompanying examination motor rises to inflection point flow, while test pressure drops to minimum pressure 0, test
Process terminates；Controller is sequentially connected the pressure value of pressure sensor one that each flow operating point measures, pressure sensor two
Pressure value and flowmeter and flow value, are depicted as curve, and detection is completed；Driving element is closed, examination motor will be accompanied by controller
Flow be adjusted to zero, constant pressure pump tapers off work.
The technical advantage of constant pressure pump test platform of the present invention and test method is：
1st, energy recovery function by the way that examination motor is accompanied to absorb most of flow that constant pressure pump exports, will flow through and accompany examination motor
The hydraulic energy transfer of fluid is kinetic energy, realizes energy regenerating.
2nd, safety, proportional pressure control valve can play the role of safety valve, system avoided to overload.
3rd, it is simple and convenient, it can complete to detect by controller, it is easy to operate.
4th, adaptivity, can automatic identification constant pressure pump inflection point, measure the complete flow-pressure diagram of constant pressure pump.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure diagram of constant pressure pump test platform of the present invention.
Specific embodiment
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This.
Embodiment 1, constant pressure pump test platform, be used for detect constant pressure pump 1, as shown in Figure 1, including synchronous belt 5, motor 6,
Circuit, measuring cell, transmission shaft 1, transmission shaft 2 92, fuel tank 10 and controller are loaded, inlet port 11 is provided on fuel tank 10
With oil return opening 12.Loading circuit includes accompanying examination motor 7 and proportional pressure control valve 8, and measuring cell includes pressure sensor 1, pressure
Sensor 2 32, flowmeter 2 and rotational speed and torque instrument 4.Motor 6, constant pressure pump 1 and rotational speed and torque instrument 4 are all disposed within transmission shaft 1
On, it can be rotated with identical rate, rotational speed and torque instrument 4 detects the velocity of rotation of transmission shaft 1.Examination motor 7 is accompanied to be arranged on transmission
On axis 2 92, transmission shaft 2 92 is connect by synchronous belt 5 with transmission shaft 1, and synchronous belt 5 plays the role of linkage, synchronous belt 5
Transmission shaft 1 and transmission shaft 2 92 is enable to rotate in same direction at the same speed.Examination motor 7 is accompanied to absorb the major part or complete that constant pressure pump 1 exports
Hydraulic energy transfer for kinetic energy and is driven constant pressure pump 1, realizes energy regenerating by portion's flow.Inlet port 11 passes through pressure sensor two
Enter the oil liquid pressure of constant pressure pump 1 with the inlet communication of constant pressure pump 1, pressure sensor 2 32 for measuring after 32.Constant pressure pump 1
Outlet is separated into two-way after being connect successively with pressure sensor 1 and flowmeter 2.The import of proportional pressure control valve 8 is connected all the way,
The import of examination motor 7 is accompanied in another way connection, and the outlet of proportional pressure control valve 8 later is with accompanying the outlet of examination motor 7 to be converged again after connecting
It is integrated to be connect again with oil return opening 12 all the way.Pressure sensor 31 (is as surveyed for measuring the pressure of fluid flowed out from constant pressure pump 1
Pressure testing power), the flow (being the flow of constant pressure pump 1) for the fluid that flowmeter 2 flows out for measurement from constant pressure pump 1.
Proportional pressure control valve 8 accompanies examination motor 7, pressure sensor 1, pressure sensor 2 32, rotational speed and torque instrument 4 and flow
Meter 2 is all connected with controller, and pressure sensor 1, pressure sensor 2 32, rotational speed and torque instrument 4 and flowmeter 2 are by acquisition
Information is converted to electric signal and sends controller to, and controller exports electric signal to proportional pressure control valve 8 and accompanies examination motor 7, controller
The test pressure of the present invention can also be controlled, controller uses siemens PLC series of PLC.Motor 6 is used as power back-off element,
Difference of the power with accompanying examination 7 regenerative power of motor needed for compensation constant pressure pump 1 so that subject constant pressure pump 1 can obtain enough
Input power.
Examination motor 7 is accompanied to recycle the hydraulic energy for flowing through the fluid for accompanying examination motor 7, is converted to mechanical energy, drives transmission shaft two
92 rotations, synchronous belt 5 transmit mechanical energy, and transmission shaft 2 92 makes transmission shaft 1 rotate at the same speed by synchronous belt 5.
Pressure of the pressure that pressure sensor 1 detects as constant pressure pump 1, i.e. test pressure, flowmeter 2 detect
Flow of the flow as constant pressure pump 1, rotating speed of the rotating speed that rotational speed and torque instrument 4 detects as constant pressure pump 1.
Controller judges that constant pressure pump 1 is in constant current or constant pressure operating mode according to the flow value of flowmeter 2, and flowmeter 2 detects
Flow value it is constant be constant current operating mode, as constant pressure operating mode when flow value changes.Controller selects different further according to operating mode
Circuit is loaded, when constant pressure pump 1 is in constant current operating mode, accompanying examination motor 7, the state in flow tracking (accompanies examination motor 7 always
Input flow rate is：The flow of flowmeter 2 subtracts steady state value) so that examination 7 input flow rate of motor is accompanied to be slightly less than flowmeter 2 always
Flow, only fraction flow (i.e. the flow of steady state value) are by proportional pressure control valve 8, and test pressure is by proportional pressure control valve 8 at this time
It determines, fraction flow is needed to flow through proportional pressure control valve 8 to establish pressure.When constant pressure pump 1 is in constant pressure operating mode, proportional pressure control valve
8 setting pressure is higher than test pressure, and proportional pressure control valve 8 is used as safety valve, and the flow of constant pressure pump 1, which all flows through, accompanies examination horse
Up to 7, by examination motor 7 is accompanied individually to load, test pressure is determined by constant pressure pump 1 at this time.Accompany examination motor 7 mutual with proportional pressure control valve 8
Loading and the constant current of constant pressure pump 1 and the identification of constant pressure inflection point are realized in cooperation.
Controller accompanies the flow of examination motor 7 to change the flow of constant pressure pump 1 by control, and passes through control and accompany examination motor 7
Increase after the first reduction of flow, to obtain pressure flow hysteresis loop of the constant pressure pump 1 in constant pressure operating mode.
Examination motor 7 is accompanied during flow tracking, if detecting a test point and the stream of the constant pressure pump 1 of a upper test point
It measures difference and is higher than a certain threshold value (can pre-set in the controller), then it is assumed that the test point is 1 constant current of constant pressure pump and constant pressure work
The inflection point of condition, and examination motor 7 is accompanied to stop flow tracking in the test point.Controller accompanies the flow of examination motor 7 when being recorded in inflection point
Signal value.
Threshold value is set asWherein QF0For constant pressure pump 1, when testing initial, constant current operating mode flows down gauge 2
Reading value；α is coefficient, takes 20%-30% or so；pmaxRated pressure for constant pressure pump 1；pΔFor under constant current operating mode in experiment
The test pressure spacing value of each test point.After on-test, under constant current operating mode, controller is sequentially increased proportional pressure control valve 8
Pressure value, according to flow tracking control to accompany examination 7 output flow signal of motor, controller when each test pressure increases,
The flow value for the constant pressure pump 1 that detection stream gauge 2 is shown a, if test point and the flow difference of the constant pressure pump 1 of a upper test point
Higher than a certain threshold value QΔThen think the inflection point that the point is constant pressure pump 1.After detecting inflection point, controller records current inflection point flow
Value, and the pressure of Set scale overflow valve 8, far above test pressure, proportional pressure control valve 8 is used as safety valve.In constant pressure operating mode
Under, first setting accompanies the flow of examination motor 7 to be reduced to zero successively, then rises to the inflection point flow value for accompanying examination motor 7 successively.
The course of work of the present invention：
1), the initial flow for trying motor 7, initial pressure set value, the threshold value of proportional pressure control valve 8 are accompanied in setting in the controller
And steady state value, the pressure of constant pressure operating mode in constant pressure pump 1 is set, opens driving element 6, driving element 6 drives transmission shaft 1
Rotation, driving constant pressure pump 1 work, and transmission shaft 1 can drive transmission shaft 2 92 to rotate by transmission belt 5 at this time；Rotational speed and torque instrument
The velocity of rotation of 4 detection transmission shafts 1, electric signal transmission is converted into controller by the physical quantity measured；
2) after, constant pressure pump 1 works, the fluid in fuel tank 10 is extracted out by inlet port 11, fluid passes through pressure sensor
2 32 flow into constant pressure pump 1, and fluid is flowed out successively from the outlet of constant pressure pump 1 after pressure sensor 1 and flowmeter 2 later
It is divided into two-way；Pressure sensor 2 32 measures the pressure for the fluid that constant pressure pump 1 is flowed into from inlet port 11, as test pressure, pressure
Force snesor 1 measures the pressure of the fluid from the outlet of constant pressure pump 1 outflow；Flowmeter 2 is measured from the outlet of constant pressure pump 1 outflow
The flow of fluid, the flow as constant pressure pump 1；The object that pressure sensor 1, pressure sensor 2 32 and flowmeter 2 will measure
Reason amount is converted into electric signal transmission to controller；
3), fluid is divided into two-way, wherein accompanying examination motor 7 that will flow through through accompanying examination motor 7 on transmission shaft 2 92 all the way and accompanying examination
The hydraulic energy recycling of the fluid of motor 7 is converted to mechanical energy and drives the rotation of transmission shaft 2 92 (2 92 rotation direction of transmission shaft and biography
Moving axis 1 is identical)；Transmission shaft 2 92 drives transmission shaft 1 to rotate by transmission belt 5, adjusts the output work of driving element 6
Rate, driving element 6 input the dump power needed for 1 constant rotation of constant pressure pump to transmission shaft 5, subject constant pressure pump 1 are made to obtain enough
Input power；Fluid another way flows through proportional pressure control valve 8；Later from proportional pressure control valve 8 and from accompany examination motor 7 outlet outflow
Fluid accumulate all the way, flow back to fuel tank 10 from oil return opening 12；
4), start detection during fluid flows, start detection at the very start from experiment：With test pressure from initial
Pressure 0 to 1 constant pressure operating mode of constant pressure pump pressure (pressure of 1 constant pressure operating mode of constant pressure pump by constant pressure pump 1 itself setting determine, by perseverance
Some screw tightness of press pump 1 determines, can voluntarily set), it is divided into n etc. points as test point；Test is controlled by controller
Pressure (controller the output phase induced current changes the pressure of proportional pressure control valve 8, so as to control test pressure to proportional pressure control valve 8),
Test pressure is made to be begun to ramp up from initial pressure；Constant pressure pump 1 is constant current operating mode at this time, and constant pressure pump 1 exports the part oil flowed out
Liquid stream, which is crossed, accompanies examination motor 7, and another part fluid flows through proportional pressure control valve 8；Controller control accompanies examination motor 7 to start flow tracking control
System makes to accompany the input flow rate of examination motor 7 to subtract steady state value for the flow of the fluid of the outlet outflow of constant pressure pump 1, and ratio is overflow at this time
The input flow rate for flowing valve 8 is steady state value；Controller carries out the flow of the constant pressure pump 1 of each test point by flowmeter 2 later
Monitoring, if a test point and the flow difference of the constant pressure pump 1 of a upper test point are higher than threshold value, controller makees the test point
For inflection point, examination motor 7 is accompanied no longer to receive flow tracking control, and constant pressure pump 1 terminates constant current operating mode；Controller records inflection point
When accompany the flow (be inflection point flow) of examination motor 7 and the flow value of flowmeter 2；
5th, constant pressure pump 1 enters constant pressure operating mode later, and test pressure continues to rise, the pressure of controller Set scale overflow valve 8
Power is far above test pressure, and whole fluid of the outlet outflow of constant pressure pump 1, which flow through, accompanies examination motor 7, without flow through proportional pressure control valve 8,
Examination motor 7 is accompanied to absorb whole flows from constant pressure pump 1, the flow of constant pressure pump 1 is the flow for accompanying examination motor 7 at this time；Control
The input flow rate of examination motor 7 is accompanied in device reduction, so as to reduce the flow from constant pressure pump 1, until accompanying the flow of examination motor 7 until 0,
The flow of constant pressure pump 1 is also reduced to zero at this time, and test pressure reaches the pressure of 1 constant pressure operating mode of constant pressure pump；
6), after the rated pressure of test pressure arrival constant pressure pump 1, the flow arrival minimum flow 0 of constant pressure pump 1, pass through
Controller rising accompany examination motor 7 input flow rate, so as to rise the flow of constant pressure pump 1, at this time test pressure with constant pressure pump 1 stream
The rising of amount and decline；The minimum flow 0 of examination motor 7 to be accompanied to be divided into several deciles as stream to the inflection point flow for accompanying examination motor 7
Measure operating point；When test pressure declines, the flow of constant pressure pump 1 rises；In each flow operating point, controller control test pressure
Power stops some time, is recorded after the data stabilization of pressure sensor 1, pressure sensor 2 32 and flowmeter 2 display；
7), when the flow for accompanying examination motor 7 rises to inflection point flow, (the two is simultaneously when test pressure drops to minimum pressure 0
Reach), test process terminates；Record pressure sensor 1, the pressure of pressure sensor 2 32 and the stream of flowmeter 2 measured
Magnitude；Driving element 6 is closed, examination 7 flow of motor will be accompanied to be adjusted to zero by controller, constant pressure pump 1 tapers off work.
In entire test process, test pressure rises successively since minimum pressure, continues to rise after inflection point, arrive
Up to the pressure of subject 1 constant pressure operating mode of constant pressure pump；The flow of constant pressure pump 1 is since constant current flow simultaneously, and when beginning is constant, by turning
After point, first minimum flow 0 is reduced to the reduction for accompanying examination 7 flow of motor.Test pressure is from 1 constant pressure operating mode of constant pressure pump later
Pressure decline successively, reach minimum pressure；The flow of constant pressure pump 1 rises successively from minimum flow 0 simultaneously, reaches inflection point stream
Amount.
Finally it should be noted that：The above various embodiments is merely to illustrate technical scheme of the present invention, rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, each embodiment scheme of invention that it does not separate the essence of the corresponding technical solution
Range.
Claims (5)
1. constant pressure pump test platform be used to detect constant pressure pump (1), it is characterised in that：Including synchronous belt (5), motor (6), add
Carry circuit, transmission shaft one (91), transmission shaft two (92) and fuel tank (10)；
The loading circuit includes accompanying examination motor (7) and proportional pressure control valve (8)；The motor (6) and constant pressure pump (1) are arranged on biography
On moving axis one (91)；It is described that examination motor (7) is accompanied to be arranged on transmission shaft two (92)；The transmission shaft one (91) passes through synchronous belt
(5) it is connect with transmission shaft two (92)；
Inlet port (11) and oil return opening (12) are provided on the fuel tank (10)；The inlet port (11) passes through pipeline and constant pressure pump
(1) it is divided into two-way after connecting, connects the import of proportional pressure control valve (8) all the way, the import of examination motor (7) is accompanied in another way connection；Institute
The outlet of proportional pressure control valve (8) is stated with the outlet of examination motor (7) is accompanied to be connect again with oil return opening (12) after connecting.
2. constant pressure pump test platform according to claim 1, it is characterised in that：Further include measuring cell；It is described to measure member
Part includes pressure sensor one (31), pressure sensor two (32), flowmeter (2) and rotational speed and torque instrument (4)；The rotational speed and torque
Instrument (4) is arranged on transmission shaft one (91)；The pressure sensor two (32) is arranged between inlet port (11) and constant pressure pump (1)
Pipeline on；The outlet of the constant pressure pump (1) divides after being sequentially connected by pipeline and pressure sensor one (31) and flowmeter (2)
For two-way.
3. constant pressure pump test platform according to claim 2, it is characterised in that：Further include controller；The controller with
Driving element (6) accompanies examination motor (7), proportional pressure control valve (8), pressure sensor one (31), pressure sensor two (32), flow
Count (2) and rotational speed and torque instrument (4) electrical connection.
4. constant pressure pump test platform according to claim 3, it is characterised in that：The motor (6) is variable-frequency motor.
5. the test method of constant pressure pump carried out using any constant pressure pump test platforms of claim 1-4, which is characterized in that
Include the following steps：
1), the initial flow for trying motor (7), initial pressure set value, the threshold value of proportional pressure control valve (8) are accompanied in setting in the controller
And steady state value, the pressure of setting constant pressure operating mode in constant pressure pump (1) open driving element (6), driving element (6) drives transmission
Axis one (91) rotates, and driving constant pressure pump (1) works；The velocity of rotation of rotational speed and torque instrument (4) detection transmission shaft one (91), will measure
Physical quantity be converted into electric signal transmission to controller；
2), after constant pressure pump (1) work, the fluid in fuel tank (10) is extracted out by inlet port (11), fluid passes through pressure sensing
Device two (32) flows into constant pressure pump (1) afterwards, and fluid is flowed out from the outlet of constant pressure pump (1) later, by pressure sensor one (31) and
Flowmeter is divided into two-way after (2)；Pressure sensor two (32) measures the pressure for the fluid that constant pressure pump (1) is flowed into from inlet port (11)
Power, as test pressure, pressure sensor one (31) measures the pressure of the fluid from constant pressure pump (1) outlet outflow；Flowmeter (2)
Measure the flow of the fluid from constant pressure pump (1) outlet outflow, the flow as constant pressure pump (1)；Pressure sensor one (31), pressure
The physical quantity measured is converted into electric signal transmission to controller by sensor two (32) and flowmeter (2)；
3), fluid is divided into two-way, wherein examination motor (7) is accompanied to drive transmission through accompanying examination motor (7) on transmission shaft two (92) all the way
Axis two (92) rotates, and transmission shaft two (92) drives transmission shaft one (91) to rotate by transmission belt (5), and driving constant pressure pump (1) works,
The output power of driving element (6) is adjusted, driving element (6) inputs surplus needed for constant pressure pump (1) constant rotation to transmission shaft (5)
Complementary work rate, makes constant pressure pump (1) obtain enough input powers, and fluid another way flows through proportional pressure control valve (8)；It overflows later from ratio
It flows valve (8) and the fluid from the outlet outflow for accompanying examination motor (7) accumulates all the way, fuel tank (10) is flowed back to from oil return opening (12)；
4), start detection during fluid flows, with test pressure from initial pressure 0 to constant pressure pump (1) constant pressure operating mode
Pressure is divided into n etc. points as test point；Test pressure is controlled by proportional pressure control valve (8) by controller at this time, presses test
Power is begun to ramp up from initial pressure 0；Constant pressure pump (1) is constant current operating mode at this time, and constant pressure pump (1) exports the part oil liquid stream flowed out
It crosses and accompanies examination motor (7), another part fluid flows through proportional pressure control valve (8)；Controller control accompanies examination motor (7) to start flow tracking
Control makes to accompany the input flow rate of examination motor (7) to subtract steady state value for the flow of constant pressure pump (1), and proportional pressure control valve (8) is defeated at this time
Inbound traffics are steady state value；Controller is monitored the flow of the constant pressure pump (1) of each test point by flowmeter (2) later,
If the flow difference of test point and the constant pressure pump (1) of a upper test point higher than threshold value, controller using the test point as
Inflection point accompanies examination motor (7) no longer to receive flow tracking control, and constant pressure pump (1) terminates constant current operating mode；Controller, which is recorded, to turn
Our controller be conveyed to accompany examination motor (7) flow as accompany examination motor (7) inflection point flow and controller record inflection point when
The flow value of flowmeter (2)；
5), for constant pressure pump (1) into constant pressure operating mode, whole fluid of the outlet outflow of constant pressure pump (1), which flow through, accompanies examination motor later
(7), without flow through proportional pressure control valve (8), examination motor (7) is accompanied to absorb whole flows from constant pressure pump (1), at this time constant pressure pump (1)
Flow be accompany examination motor (7) flow；The flow of examination motor (7) is accompanied by controller reduction, so as to reduce constant pressure pump (1)
Flow, at this time test pressure rise with the reduction of the flow of constant pressure pump (1)；Until the flow for accompanying examination motor (7) is to 0
Only, the flow of constant pressure pump (1) is also reduced to zero, and test pressure reaches the pressure of constant pressure pump (1) constant pressure operating mode；
6), after the pressure of test pressure arrival constant pressure pump (1) constant pressure operating mode, the flow arrival minimum flow 0 of constant pressure pump (1),
The flow of examination motor (7) is accompanied by controller rising, so as to rise the flow of constant pressure pump (1), test pressure is with constant pressure pump at this time
(1) rising of flow and decline；To accompany the minimum flow 0 of examination motor (7) to the inflection point flow for accompanying examination motor (7), if being divided into
Dry decile is as flow operating point；In each flow operating point, controller control test pressure stops some time, treats that pressure passes
It is recorded after the data stabilization of sensor one (31), pressure sensor two (32) and flowmeter (2) display；
7) it, when the flow for accompanying examination motor (7) rises to inflection point flow, while test pressure drops to minimum pressure 0, tested
Journey terminates；Record the pressure value of pressure sensor one (31), the pressure value of pressure sensor two (32) and the flowmeter (2) measured
Flow value；Driving element (6) is closed, the flow for accompanying examination motor (7) is adjusted to zero by controller, constant pressure pump (1) is gradual
It is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480143.7A CN108266362B (en) | 2017-12-29 | 2017-12-29 | Constant pressure pump test platform and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480143.7A CN108266362B (en) | 2017-12-29 | 2017-12-29 | Constant pressure pump test platform and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266362A true CN108266362A (en) | 2018-07-10 |
| CN108266362B CN108266362B (en) | 2019-09-03 |
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| CN201711480143.7A Active CN108266362B (en) | 2017-12-29 | 2017-12-29 | Constant pressure pump test platform and test method |
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| CN111120291A (en) * | 2020-01-18 | 2020-05-08 | 西安航空学院 | Hydraulic speed-regulating power closed test system |
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| CN111120291A (en) * | 2020-01-18 | 2020-05-08 | 西安航空学院 | Hydraulic speed-regulating power closed test system |
| CN111120291B (en) * | 2020-01-18 | 2022-02-08 | 西安航空学院 | Hydraulic speed-regulating power closed test system |
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| CN108266362B (en) | 2019-09-03 |
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