CN110030218A - Pump hydraulic loading system and its application method - Google Patents
Pump hydraulic loading system and its application method Download PDFInfo
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- CN110030218A CN110030218A CN201910405537.9A CN201910405537A CN110030218A CN 110030218 A CN110030218 A CN 110030218A CN 201910405537 A CN201910405537 A CN 201910405537A CN 110030218 A CN110030218 A CN 110030218A
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- pump
- directional control
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000446 fuel Substances 0.000 claims description 38
- 238000012360 testing method Methods 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims 2
- 230000008676 import Effects 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 4
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
-
- 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
-
- 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
Abstract
The present invention relates to hydraulic loaded fields, specifically disclose a kind of pump hydraulic loading system and its application method, wherein, pump hydraulic loading system, including oil sump, the first oil pump, the second oil pump, motor, check valve, solenoid directional control valve and hydraulic cylinder, the oil sump, the first oil pump, solenoid directional control valve first interface be connected on first pipeline；The oil sump, the second oil pump and check valve are sequentially communicated on second pipeline, and second pipeline connection is between first oil pump of first pipeline and the solenoid directional control valve；The second interface of the solenoid directional control valve is connected on the third pipeline with the LOADED CAVITY；The third orifice of the unloading chamber and the solenoid directional control valve is on the 4th pipeline；4th interface of the solenoid directional control valve is connected to the oil sump.By the setting of two oil pumps, realizes that load and discharge rate are adjustable, mention high control precision.
Description
Technical field
The present invention relates to hydraulic loaded field, especially a kind of pump hydraulic loading system and its application method
Background technique
Hydraulic loaded uses very generally in life, such as injection molding machine and pressure test etc., powerful load system
Often commonly used in system is hydraulic loading system, however in existing high power hydraulic loading system, it uses powerful
Threephase asynchronous machine collocation super-high-pressure plunger pump is supplied as the oil sources of pipeline, but existing in load and unloading is all to fix speed
Degree, and control inaccuracy.
Summary of the invention
It is an object of the invention to improve the prior art, a kind of pump hydraulic loading system is provided and its is made
It is realized that load and discharge rate are adjustable by the setting of two oil pumps with method, mentions high control precision.
Its technical solution is as follows:
Pump hydraulic loading system, including oil sump, the first oil pump, the second oil pump, motor, check valve, solenoid directional control valve and
Hydraulic cylinder, the oil sump, the first oil pump, the second oil pump, check valve, solenoid directional control valve are connected on pipeline with hydraulic cylinder, institute
Stating pipeline includes the first pipeline, the second pipeline, third pipeline and the 4th pipeline, and the solenoid directional control valve at least includes four and connects
Mouthful, the hydraulic cylinder includes LOADED CAVITY and unloading chamber；The first interface connection of the oil sump, the first oil pump, solenoid directional control valve exists
On first pipeline；The oil sump, the second oil pump and check valve are sequentially communicated on second pipeline, second pipeline
Connection is between first oil pump of first pipeline and the solenoid directional control valve；The second interface of the solenoid directional control valve
It is connected to the LOADED CAVITY on the third pipeline；The third orifice of the unloading chamber and the solenoid directional control valve is in institute
It states on the 4th pipeline；4th interface of the solenoid directional control valve is connected to the oil sump；There are two the motor settings, drives respectively
Move first oil pump and second oil pump.
The solenoid directional control valve includes the high-voltage electromagnetic reversal valve of two tubing types.
First oil pump is high-pressure oil pump, and second oil pump is low pressure fuel pump.
High-pressure safety valve, the height are communicated between first oil pump of first pipeline and the solenoid directional control valve
The input terminal and first pipeline connection of safety valve are pressed, output end is connected to the oil sump.
Digital throttle, the number are communicated between first oil pump of first pipeline and the solenoid directional control valve
The input terminal of byte stream valve and first pipeline connection, output end are connected to the oil sump.
Pressure gauge is communicated between first oil pump of first pipeline and the solenoid directional control valve.
The motor includes servo motor and threephase asynchronous machine, and the servo motor drives first oil pump, described
Threephase asynchronous machine drives second oil pump.
The output end of first oil pump is communicated with high-pressure filter, first oil pump after high-pressure filter with institute
State the first pipeline connection.
Superimposed relief valve is communicated on 4th pipeline, the Superimposed relief valve other end and the oil sump connect
It is logical.
Pressure sensor is installed at the top of the piston rod outer end of the hydraulic cylinder.
Pump hydraulic loading system application method, includes the following steps,
Load signal is received, solenoid directional control valve is connected to the first pipeline and third pipeline, the 4th pipeline are connected to oil sump, starts
Motor drives the first oil pump, the second oil pump feed；
First oil pump feed converges into the second pipeline, the second pipeline oil by check valve into the first pipeline, the second oil pump feed
Enter the first pipeline；
First oil pump and the second oil pump feed are delivered to third pipeline after the first pipeline converges, by solenoid directional control valve,
Enter the LOADED CAVITY of hydraulic cylinder afterwards；
Fuel feeding LOADED CAVITY oil mass quicklys increase simultaneously for first oil pump and the second oil pump, and piston rod is pushed to fast move to test
Position；
Stimulus is received, the motor of the second oil pump of driving stops working, and the second oil pump fuel cut-off, the second oil pump continues
Fuel feeding, LOADED CAVITY oil mass are slowly increased, and are pushed piston rod slowly mobile load, are started to test；
Unloader signal, solenoid directional control valve commutation, the first pipeline and the 4th pipeline connection are received, third pipeline and oil sump connect
It is logical, the electric motor starting of the second oil pump is driven, the second oil pump feed is driven；
Fuel feeding unloading chamber oil mass quicklys increase simultaneously for first oil pump and the second oil pump, and piston rod is pushed quickly to recycle；
Unloading terminates.
It should be understood that
Aforementioned " first, second, third ... " does not represent specific quantity and sequence, is only used for the area to title
Point.
Advantages of the present invention or principle are illustrated below:
1, pump hydraulic loading system, including the first oil pump and the second oil pump, can be carried out when in use by console
Operation, when needing to test, advanced row situation monitoring, due to piston rod portion, there are biggish skies with pressurized sample is needed at this time
Between, so needing quickly to be moved piston rod, console starts the first oil pump and the second oil pump fuel feeding simultaneously at this time, will
The LOADED CAVITY of hydraulic cylinder carries out quick oiling, quickly piston rod is pushed move close to needing pressurized sample, at this point, test is
It will start, then console output control signal, the motor of the second oil pump will be driven to stop, the second oil pump fuel cut-off, so
Only the first oil pump feed, the movement of piston rod is quickly slowed down at this time, is slowly pressurizeed, and control precision improves, and can hold
The continuous pressure that applies is without falling, further, since the unidirectional valve action of the second pipeline, so the second pipeline is not in oil return situation,
After the completion of test, console controls solenoid directional control valve, and by the first pipeline and the 4th pipeline connection, the second pipeline is connected to oil sump,
Then the motor work of the second oil pump of starting driving, the second oil pump start fuel feeding, and the first oil pump and the second oil pump supply simultaneously at this time
The unloading chamber of hydraulic cylinder is carried out quick oiling, quickly piston rod is pushed to be shunk, complete test, pass through control first by oil
The start and stop of oil pump and the second oil pump, to control loading velocity, also can to the control of precision,.
2, wherein the first oil pump is high-pressure oil pump, and high-pressure oil pump is to provide small flow, is slowly adjusted, the second oil pump is
Low pressure fuel pump provides big flow, realizes fast moving for piston rod, while the first oil pump high-pressure oil pump is when maintaining pressure
Precision controlling is more accurate.
3, it is communicated with high-pressure safety valve between the first oil pump and solenoid directional control valve of the first pipeline, due in working condition
When oil pressure is excessively high can damage component, so played a protective role by the way that high-pressure safety valve is arranged, once be more than high-pressure safety valve
Oil in first pipeline is conducted to oil sump, completes decompression, protects pipeline and member by the pressure value of setting, high-pressure safety valve conducting
The safety of device.
4, it is communicated with digital throttle between the first oil pump and solenoid directional control valve of the first pipeline, digital throttle can lead to
The control for crossing console controls the flow on the first pipeline, and when flow is excessive, digital throttle is begun to turn on, by portion
Point oil mass is transported to oil sump, thus the flow on the first pipeline of control.
5, it is communicated with pressure gauge between first oil pump and the solenoid directional control valve of the first pipeline, passes through pressure gauge
Registration directly learns the oil pressure value in the first pipeline, as referential data.
6, motor includes servo motor and threephase asynchronous machine, the first oil pump of Serve Motor Control, due to servo motor
Revolving speed is adjustable, thus it is adjustable when controlling the flow of the first oil pump, and the first oil pump is that fuel feeding is carried out in load test,
So controlling the movement speed of the piston rod of hydraulic cylinder by the fuel delivery for controlling the first oil pump, the control essence of system is provided
Degree, and Three-phase Induction Motor Control drives the second oil pump, threephase asynchronous machine revolving speed is unadjustable, and the second oil pump is allowed to provide always
Maximum fuel delivery facilitates the piston rod of hydraulic cylinder quick so the oil mass that can be provided when the second oil pump feed of starting increases
It is mobile, while Serve Motor Control, the calorific value of oil sources is small, and low noise.
7, the output end of the first oil pump connects high-pressure filter, and the impurity produced in hydraulic system is filtered, and sets
The output end in the first oil pump is set, prevents impurity from entering in system administration, it is possible to be controlled on the source of fuel feeding.
8, it is connected with Superimposed relief valve on the 4th pipeline, to the oil pressure cntrol of the 4th pipeline, prevents oil pressure excessive.
9, pressure sensor is installed on the piston rod outer end top of hydraulic cylinder, guarantees the sample in test needing to pressurize
Product and pressure sensor Impact direction on the same axis, guarantee the precision of measurement, while the pressure measured by pressure sensor
Power is transported to console, and console receives output control signal after signal, controls digital throttle, servo motor, real
The pressurization and pressure maintaining of existing system are vacant.
Detailed description of the invention
Fig. 1 is the pipeline schematic diagram of the embodiment of the present invention；
Fig. 2 is the complete machine circuit theory schematic diagram of the embodiment of the present invention.
Description of symbols:
01, oil sump；02, the first oil pump；03, the second oil pump；04, motor；05, check valve；06, solenoid directional control valve；07, liquid
Cylinder pressure；071, LOADED CAVITY；072, chamber is unloaded；08, high-pressure safety valve；09, digital throttle；10, pressure gauge；11, high filter pressed oil
Device；12, Superimposed relief valve；13, pressure sensor；100, the first pipeline；200, the second pipeline；300, third pipeline；400,
4th pipeline；14, top board；15, lower platen；16, rack.
Specific embodiment
The embodiment of the present invention is described in detail below.
As depicted in figs. 1 and 2, pump hydraulic loading system, including oil sump 01, the first oil pump 02, the second oil pump 03, motor
04, check valve 05, solenoid directional control valve 06 and hydraulic cylinder 07, the oil sump 01, the first oil pump 02, the second oil pump 03, check valve 05,
Solenoid directional control valve 06 is connected on pipeline with hydraulic cylinder 07, and the solenoid directional control valve 06 includes the high-voltage electromagnetic of two tubing types
Reversal valve 06, the pipeline includes the first pipeline 100, the second pipeline 200, third pipeline 300 and the 4th pipeline 400, described
Solenoid directional control valve 06 at least includes four interfaces, and the hydraulic cylinder 07 includes LOADED CAVITY 071 and unloading chamber 072；The oil sump 01,
First oil pump 02, solenoid directional control valve 06 first interface be connected on first pipeline 100；The oil sump 01, the second oil pump
03 and check valve 05 be sequentially communicated on second pipeline 200, second pipeline 200 connection is in first pipeline 100
First oil pump 02 and the solenoid directional control valve 06 between；The second interface and the LOADED CAVITY of the solenoid directional control valve 06
071 connection is on the third pipeline 300；The third orifice of the unloading chamber 072 and the solenoid directional control valve 06 is in institute
It states on the 4th pipeline 400；4th interface of the solenoid directional control valve 06 is connected to the oil sump 01；
There are two the settings of motor 04, respectively drives first oil pump 02 and second oil pump 03.Wherein, described
First oil pump 02 is high-pressure oil pump, and second oil pump 03 is low pressure fuel pump.
High-pressure safety valve is communicated between first oil pump 02 and the solenoid directional control valve 06 of first pipeline 100
08, the input terminal of the high-pressure safety valve 08 is connected to first pipeline 100, and output end is connected to the oil sump 01；It is described
Digital throttle 09, the number are communicated between first oil pump 02 and the solenoid directional control valve 06 of first pipeline 100
The input terminal of throttle valve 09 is connected to first pipeline 100, and output end is connected to the oil sump 01；First pipeline 100
First oil pump 02 and the solenoid directional control valve 06 between be communicated with pressure gauge 10.
The motor 04 includes servo motor 04 and threephase asynchronous machine 04, and the servo motor 04 drives first oil
Pump 02, the threephase asynchronous machine 04 drives second oil pump 03.
The output end of first oil pump 02 is communicated with high-pressure filter 11, and first oil pump 02 passes through high-pressure filter
It is connected to after 11 with first pipeline 100；Superimposed relief valve 12 is communicated on 4th pipeline 400, the superposing type overflows
Stream 12 other end of valve is connected to the oil sump 01.
As shown in Fig. 2, hydraulic cylinder 07 is mounted on 16 bottom of rack, at the top of the piston rod outer end of the hydraulic cylinder 07 on
Pressure sensor 13 is installed, and rack 16 includes top board 14 and lower platen 15, lower platen 15 is mounted on hydraulic cylinder 07
At the top of piston rod outer end, top board 14 is mounted on the coaxial top of lower platen 15, and specifically, pressure sensor 13 is mounted on down
Between at the top of the piston rod outer end of pressing plate 15 and hydraulic cylinder 07.
When work, pressure sensor 13 receives signal, is transported to console, and console exports control signal after processing
Servo motor 04, threephase asynchronous machine 04, digital throttle 09 and solenoid directional control valve 06 are directly controlled respectively.
Pump hydraulic loading system application method, includes the following steps,
Load signal is received, solenoid directional control valve 06 is connected to the first pipeline 100 and third pipeline 300, the 4th pipeline 400 and oil
Pond 01 is connected to, and starts motor 04, drives the first oil pump 02,03 fuel feeding of the second oil pump；
First oil pump, 02 fuel feeding is into the first pipeline 100, and for 03 fuel feeding of the second oil pump into the second pipeline 200, the second pipeline 200 is oily
The first pipeline 100 is imported by check valve 05；
First oil pump 02 and 03 fuel feeding of the second oil pump are delivered to after the first pipeline 100 converges by solenoid directional control valve 06
Third pipeline 300, the rear LOADED CAVITY 071 for entering hydraulic cylinder 07；
071 oil mass of fuel feeding LOADED CAVITY quicklys increase simultaneously for first oil pump 02 and the second oil pump 03, and piston rod is pushed quickly to move
It moves to testing position；
Stimulus is received, the motor 04 of the second oil pump 03 of driving stops working, 03 fuel cut-off of the second oil pump, the second oil
Pump 03 continues fuel feeding, and 071 oil mass of LOADED CAVITY is slowly increased, and pushes piston rod slowly mobile load, starts to test；
Unloader signal is received, solenoid directional control valve 06 commutates, and the first pipeline 100 is connected to the 4th pipeline 400, third pipeline
300 are connected to oil sump 01, and the motor 04 of the second oil pump 03 of driving starts, and drive 03 fuel feeding of the second oil pump；
Fuel feeding unloading 072 oil mass of chamber quicklys increase simultaneously for first oil pump 02 and the second oil pump 03, and piston rod is pushed quickly to return
It receives；
Unloading terminates, and test is completed.
The advantages of the present embodiment and principle:
1, pump hydraulic loading system, including the first oil pump 02 and the second oil pump 03, can pass through console when in use
It is operated, when needing to test, advanced row situation monitoring, due to piston rod portion, there are larger with pressurized sample is needed at this time
Space, so need quickly to be moved piston rod, console starts the first oil pump 02 at this time and the second oil pump 03 is same
When fuel feeding, the LOADED CAVITY 071 of hydraulic cylinder 07 is subjected to quick oiling, quickly push piston rod move close to needing the sample that pressurizes
Product, at this point, test will start, then console output control signal, will drive the motor 04 of the second oil pump 03 to stop, and second
03 fuel cut-off of oil pump, so 02 fuel feeding of only the first oil pump, the movement of piston rod is quickly slowed down at this time, is slowly pressurizeed, control
Precision improves, and can with continu to press without falling, further, since the check valve 05 of the second pipeline 200 acts on, so
Second pipeline 200 is not in oil return situation, and after the completion of test, console controls solenoid directional control valve 06, by 100 He of the first pipeline
The connection of 4th pipeline 400, the second pipeline 200 are connected to oil sump 01, and then the motor 04 of the second oil pump 03 of starting driving works, the
Two oil pumps 03 start fuel feeding, and the first oil pump 02 and the second oil pump 03 while fuel feeding, the unloading chamber 072 of hydraulic cylinder 07 is carried out at this time
Quick oiling quickly pushes piston rod to be shunk, and completes test, by the starting for controlling the first oil pump 02 and the second oil pump 03
With stopping, to control loading velocity, also can to the control of precision,.
2, wherein the first oil pump 02 is high-pressure oil pump, and high-pressure oil pump is to provide small flow, is slowly adjusted, the second oil pump
03 is low pressure fuel pump, provides big flow, realizes fast moving for piston rod, while 02 high-pressure oil pump of the first oil pump is maintaining pressure
When precision controlling it is more accurate.
3, it is communicated with high-pressure safety valve 08 between the first oil pump 02 and solenoid directional control valve 06 of the first pipeline 100, due to
In working condition, oil pressure is excessively high can damage component, so played a protective role by the way that high-pressure safety valve 08 is arranged, once it is super
The pressure value of the setting of high-pressure safety valve 08 is crossed, high-pressure safety valve 08 is connected, the oil in the first pipeline 100 is conducted to oil sump 01,
Decompression is completed, the safety of pipeline and component is protected.
4, digital throttle 09, number section are communicated between the first oil pump 02 and solenoid directional control valve 06 of the first pipeline 100
Stream valve 09 can control the flow on the first pipeline 100 by the control of console, when flow is excessive, digital throttle
Valve 09 is begun to turn on, and part oil mass is transported to oil sump 01, thus the flow on the first pipeline 100 of control.
5, it is communicated with pressure gauge 10 between first oil pump 02 and the solenoid directional control valve 06 of the first pipeline 100, led to
The registration of excess pressure table 10 directly learns the oil pressure value in the first pipeline 100, as referential data.
6, motor 04 includes servo motor 04 and threephase asynchronous machine 04, and servo motor 04 controls the first oil pump 02, due to
The revolving speed of servo motor 04 is adjustable, thus it is adjustable when controlling the flow of the first oil pump 02, and the first oil pump 02 is to add
Fuel feeding is carried out when carrying test, so controlling the movement of the piston rod of hydraulic cylinder 07 by the fuel delivery for controlling the first oil pump 02
Speed provides the control precision of system, and the control of threephase asynchronous machine 04 drives the second oil pump 03,04 revolving speed of threephase asynchronous machine
It is unadjustable, allow the second oil pump 03 to provide maximum fuel delivery always, so can be provided when the second 03 fuel feeding of oil pump of starting
Oil mass increases, and the piston rod of hydraulic cylinder 07 is facilitated to fast move, while servo motor 04 controls, and the calorific value of oil sources is small, and
Low noise.
7, the output end of the first oil pump 02 connects high-pressure filter 11, and the impurity produced in hydraulic system is filtered,
And the output end of the first oil pump 02 is set, prevent impurity from entering in system administration, it is possible to enterprising in the source of fuel feeding
Row control.
8, it is connected with Superimposed relief valve 12 on the 4th pipeline 400, to the oil pressure cntrol of the 4th pipeline 400, prevents oil
It presses through big.
9, pressure sensor 13 is installed on the piston rod outer end top of hydraulic cylinder 07, guarantee needs to pressurize in test
Sample and 13 Impact direction of pressure sensor on the same axis, guarantee measurement precision, while pass through pressure sensor 13
The pressure measured is transported to console, and console receives output control signal after signal, to digital throttle 09, servo motor 04
It is controlled, realizes that the pressurization of system and pressure maintaining are vacant.
The above is only specific embodiments of the present invention, are not limited the scope of protection of the present invention with this；Do not violating this hair
Made any replacement and improvement, category protection scope of the present invention on the basis of bright design.
Claims (10)
1. pump hydraulic loading system, which is characterized in that including oil sump, the first oil pump, the second oil pump, motor, check valve, electromagnetism
Reversal valve and hydraulic cylinder, the oil sump, the first oil pump, the second oil pump, check valve, solenoid directional control valve are connected to hydraulic cylinder in pipe
On the road, the pipeline includes the first pipeline, the second pipeline, third pipeline and the 4th pipeline, and the solenoid directional control valve at least wraps
Four interfaces are included, the hydraulic cylinder includes LOADED CAVITY and unloading chamber；
The oil sump, the first oil pump, solenoid directional control valve first interface be connected on first pipeline；The oil sump, second
Oil pump and check valve are sequentially communicated on second pipeline, second pipeline connection in first pipeline described first
Between oil pump and the solenoid directional control valve；The second interface of the solenoid directional control valve is connected in the third pipe with the LOADED CAVITY
On the road；The third orifice of the unloading chamber and the solenoid directional control valve is on the 4th pipeline；The solenoid directional control valve
The 4th interface be connected to the oil sump；
There are two the motor settings, respectively drives first oil pump and second oil pump.
2. pump hydraulic loading system as described in claim 1, which is characterized in that first oil pump is high-pressure oil pump, described
Second oil pump is low pressure fuel pump.
3. pump hydraulic loading system as described in claim 1, which is characterized in that first oil pump of first pipeline and
High-pressure safety valve, the input terminal of the high-pressure safety valve and first pipeline connection are communicated between the solenoid directional control valve,
Output end is connected to the oil sump.
4. pump hydraulic loading system as described in claim 1, which is characterized in that first oil pump of first pipeline and
Digital throttle, the input terminal of the digital throttle and first pipeline connection are communicated between the solenoid directional control valve,
Output end is connected to the oil sump.
5. pump hydraulic loading system as described in claim 1, which is characterized in that first oil pump of first pipeline and
Pressure gauge is communicated between the solenoid directional control valve.
6. the pump hydraulic loading system as described in any one of claim 1 to 5, which is characterized in that the motor includes servo electricity
Machine and threephase asynchronous machine, the servo motor drive first oil pump, threephase asynchronous machine driving second oil
Pump.
7. the pump hydraulic loading system as described in any one of claim 1 to 5, which is characterized in that the output of first oil pump
End is communicated with high-pressure filter, first oil pump after high-pressure filter with first pipeline connection.
8. the pump hydraulic loading system as described in any one of claim 1 to 5, which is characterized in that be connected on the 4th pipeline
There is Superimposed relief valve, the Superimposed relief valve other end is connected to the oil sump.
9. the pump hydraulic loading system as described in any one of claim 1 to 5, which is characterized in that the piston rod of the hydraulic cylinder
Pressure sensor is installed at the top of outer end.
10. pump hydraulic loading system application method, which is characterized in that include the following steps,
Load signal is received, solenoid directional control valve is connected to the first pipeline and third pipeline, the 4th pipeline are connected to oil sump, starting electricity
Machine drives the first oil pump, the second oil pump feed；
First oil pump feed is into the first pipeline, and for the second oil pump feed into the second pipeline, the second pipeline oil imports the by check valve
One pipeline；
First oil pump and the second oil pump feed are delivered to third pipeline after the first pipeline converges, by solenoid directional control valve, laggard
Enter the LOADED CAVITY of hydraulic cylinder；
Fuel feeding LOADED CAVITY oil mass quicklys increase simultaneously for first oil pump and the second oil pump, and piston rod is pushed to fast move to test position
It sets；
Stimulus is received, the motor of the second oil pump of driving stops working, and the second oil pump fuel cut-off, the second oil pump continues to supply
Oil, LOADED CAVITY oil mass are slowly increased, and are pushed piston rod slowly mobile load, are started to test；
Unloader signal, solenoid directional control valve commutation are received, the first pipeline and the 4th pipeline connection, third pipeline are connected to oil sump, drive
The electric motor starting of dynamic second oil pump, drives the second oil pump feed；
Fuel feeding unloading chamber oil mass quicklys increase simultaneously for first oil pump and the second oil pump, and piston rod is pushed quickly to recycle；
Unloading terminates.
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| CN201910405537.9A CN110030218A (en) | 2019-05-15 | 2019-05-15 | Pump hydraulic loading system and its application method |
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| CN201910405537.9A CN110030218A (en) | 2019-05-15 | 2019-05-15 | Pump hydraulic loading system and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398422A (en) * | 2019-08-27 | 2019-11-01 | 浙江辰鑫机械设备有限公司 | A kind of rapid pressure test machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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