CN211901162U - Hydraulic test bed - Google Patents
Hydraulic test bed Download PDFInfo
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- CN211901162U CN211901162U CN202020260515.6U CN202020260515U CN211901162U CN 211901162 U CN211901162 U CN 211901162U CN 202020260515 U CN202020260515 U CN 202020260515U CN 211901162 U CN211901162 U CN 211901162U
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Abstract
The utility model provides a hydraulic test platform, it is including: the device comprises an oil tank assembly, an oil supply motor pump set and a test module. The test module comprises a first proportional overflow valve, a first one-way valve, a first flowmeter, a first throttle valve, an electro-hydraulic reversing valve, an A port and a B port. One end of the first proportional overflow valve is communicated with the oil supply motor pump set, and the other end of the first proportional overflow valve is communicated with the oil tank assembly. An oil inlet of the first check valve is communicated with an oil inlet of the first proportional overflow valve, an oil outlet of the first check valve is communicated with an oil inlet of the first flow meter, and an oil outlet of the first flow meter is communicated with an oil inlet of the first throttle valve. Two oil inlets of the electro-hydraulic reversing valve are respectively communicated with an oil outlet of the first throttling valve and the port B, and an oil outlet of the electro-hydraulic reversing valve is communicated with the port A. When the electro-hydraulic reversing valve is powered off, the port A is communicated with the port B; when the electro-hydraulic reversing valve is electrified, the first throttle valve is communicated with the port A, and the port B is communicated with the oil tank assembly. The hydraulic test bed is simple and convenient to operate and can meet the requirement of a test function.
Description
Technical Field
The utility model relates to a hydraulic test platform.
Background
With the progress of science and technology, the pace of modern industry is accelerated, the traditional hydraulic industry needs to be advanced all the time, and many traditional hydraulic devices are upgraded and updated, so the requirement on hydraulic elements is higher and higher, and the traditional hydraulic element detection device has single function and is complex to operate, so that the requirement of modern industry is difficult to meet.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a hydraulic test bench in order to overcome among the prior art hydraulic component check out test set function singleness, complex operation's defect.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a hydraulic test stand is characterized in that the hydraulic test stand comprises:
the oil tank assembly is used for storing hydraulic oil;
an input port of the oil supply motor-pump set is communicated with the oil tank assembly and is used for outputting hydraulic oil;
the test module comprises a first proportional overflow valve, a first one-way valve, a first flowmeter, a first throttle valve, an electro-hydraulic directional valve, an A port and a B port, one end of the first proportional overflow valve is communicated with an output port of the oil supply motor pump set, the other end of the first proportional overflow valve is communicated with the oil tank assembly, an oil inlet of the first one-way valve is communicated with an oil inlet of the first proportional overflow valve, an oil outlet of the first one-way valve is communicated with an oil inlet of the first flowmeter, an oil outlet of the first flowmeter is communicated with an oil inlet of the first throttle valve, the A port and the B port are working oil ports, the electro-hydraulic directional valve is a two-position three-way valve, two oil inlets of the electro-hydraulic directional valve are respectively communicated with the oil outlet of the first throttle valve and the B port, and an oil outlet of the electro-hydraulic directional valve is communicated with the A port, when the electro-hydraulic reversing valve is powered off, the port A is communicated with the port B, when the electro-hydraulic reversing valve is powered on, the first throttling valve is communicated with the port A, and the port B is communicated with the oil tank assembly.
Preferably, the oil supply motor pump set comprises a motor and an axial plunger pump, the axial plunger pump is provided with a control oil port, the test module further comprises an LS port and a first electromagnetic valve, the first electromagnetic valve is a two-position three-way valve, two oil inlets of the first electromagnetic valve are respectively communicated with an oil outlet of the first throttle valve and the LS port, an oil outlet of the first electromagnetic valve is communicated with the control oil port, when the first electromagnetic valve is powered off, the oil outlet of the first throttle valve is communicated with the control oil port, and when the first electromagnetic valve is powered on, the LS port is communicated with the control oil port.
Preferably, the first throttle valve is a proportional throttle valve.
Preferably, the test module further comprises a high-pressure filter, and the high-pressure filter is mounted on a pipeline between an output port of the oil supply motor pump set and an oil inlet of the first proportional overflow valve.
Preferably, the hydraulic test bed further comprises a loading module, the loading module comprises a first loading one-way valve, a second loading one-way valve, a third loading one-way valve, a fourth loading one-way valve, a second flowmeter, a safety valve, a second overflow valve, a port C and a port D, the port C is communicated with an oil outlet of the third loading one-way valve and an oil inlet of the fourth loading one-way valve, the port D is communicated with an oil outlet of the first loading one-way valve and an oil inlet of the second loading one-way valve, oil inlets of the safety valve and the second overflow valve are communicated with an oil outlet of the second loading one-way valve and an oil outlet of the fourth loading one-way valve, oil outlets of the safety valve and the second overflow valve are communicated with an oil inlet of the second loading one-way valve and an oil inlet of the fourth loading one-way valve through the second flowmeter.
Preferably, the second relief valve is a proportional relief valve.
Preferably, the hydraulic test bed further comprises a pilot module, the pilot module comprises a pilot oil port, a second check valve, a pressure reducing valve and an electromagnetic directional valve, an oil inlet of the second check valve is connected to a pipeline between the first proportional overflow valve and the first check valve, an oil outlet of the second check valve is communicated with an oil inlet of the pressure reducing valve, an oil outlet of the pressure reducing valve is connected to an oil inlet of the electromagnetic directional valve, an oil outlet of the electromagnetic directional valve is connected to the pilot oil port, the electromagnetic directional valve is a two-position two-way valve, when the electromagnetic directional valve is powered off, the oil inlet and the oil outlet of the electromagnetic directional valve are disconnected, and when the electromagnetic directional valve is powered on, the oil inlet and the oil outlet of the electromagnetic directional valve are communicated.
Preferably, the pilot module further comprises a second proportional overflow valve, an oil inlet of the second proportional overflow valve is connected to a pipeline between the pressure reducing valve and the electromagnetic directional valve, and an oil outlet of the second proportional overflow valve is communicated with the oil tank assembly.
Preferably, the hydraulic test bed further comprises an internal drainage module, the internal drainage module comprises an internal oil drainage port, a second electromagnetic valve and a third flow meter, the second electromagnetic valve is a two-position two-way valve, the internal oil drainage port is communicated with the oil tank assembly through the second electromagnetic valve and the third flow meter, when the second electromagnetic valve is powered off, an oil inlet and an oil outlet of the second electromagnetic valve are communicated, and when the second electromagnetic valve is powered on, the oil inlet and the oil outlet of the second electromagnetic valve are disconnected.
Preferably, the internal drainage module further comprises a third solenoid valve and a measuring cup, the third solenoid valve is a two-position three-way valve, an oil inlet of the third solenoid valve is connected with the internal drainage port, two oil outlets of the third solenoid valve are respectively connected to the second solenoid valve and the measuring cup, when the third solenoid valve is powered off, the internal drainage port is communicated with the second solenoid valve, and when the third solenoid valve is powered on, the internal drainage port is communicated with the measuring cup.
Preferably, the hydraulic test bed further comprises a plurality of pressure sensors and a plurality of pressure gauges, and the pressure sensors and the pressure gauges are installed on a pipeline of the hydraulic test bed.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in: the hydraulic test bench can provide a test environment with adjustable oil pressure and controllable flow speed for the hydraulic element to be tested, is simple and convenient to operate, and meets the requirement of test function.
Drawings
Fig. 1 is a schematic perspective view of a hydraulic test stand according to a preferred embodiment of the present invention.
Fig. 2 is a hydraulic schematic diagram of a hydraulic test bed in the preferred embodiment of the present invention.
Description of the reference numerals
Oil drain ball valve 180
Oil supply motor-pump set 200
First proportional relief valve 310
Electro-hydraulic directional valve 350
A port 361
LS port 363
Loading module 400
First loading check valve 410
Second loading check valve 420
Third loading check valve 430
Fourth loading check valve 440
Electromagnetic directional valve 540
Second proportional relief valve 550
Internal oil drain port 610
Measuring cup 650
Detailed Description
The present invention will be more clearly and completely described below with reference to the accompanying drawings.
Fig. 1 and 2 show a hydraulic test stand comprising: oil tank assembly 100, fuel supply motor-pump package 200, and test module 300. The oil tank assembly 100 is used for storing hydraulic oil, and an input port of the oil supply motor-pump set 200 is communicated with the oil tank assembly 100 and used for outputting the hydraulic oil. The test module 300 includes a first proportional relief valve 310, a first check valve 320, a first flow meter 330, a first throttle valve 340, an electro-hydraulic directional valve 350, an a port 361, and a B port 362. One end of the first proportional relief valve 310 is communicated with an output port of the oil supply motor-pump stack 200, and the other end of the first proportional relief valve 310 is communicated with the oil tank assembly 100. The oil inlet of the first check valve 320 is communicated with the oil inlet of the first proportional overflow valve 310, the oil outlet of the first check valve 320 is communicated with the oil inlet of the first flow meter 330, and the oil outlet of the first flow meter 330 is communicated with the oil inlet of the first throttle valve 340. The port A361 and the port B362 are working oil ports, the electro-hydraulic directional valve 350 is a two-position three-way valve, two oil inlets of the electro-hydraulic directional valve 350 are respectively communicated with an oil outlet of the first throttle valve 340 and the port B362, and an oil outlet of the electro-hydraulic directional valve 350 is communicated with the port A361. When the electro-hydraulic directional valve 350 is powered off, the port A361 is communicated with the port B362; when the electro-hydraulic directional valve 350 is energized, the first throttle valve 340 is communicated with the port A361. The B port 362 communicates with the tank assembly 100.
In the scheme, when the device is required to be used for testing a hydraulic element, firstly, an oil inlet and an oil outlet of the hydraulic element to be tested are respectively connected to the port A361 and the port B362, an overflow oil pressure set value of the first proportional overflow valve 310 and the flow rate of the first throttling valve 340 are adjusted according to testing requirements, then, the oil supply motor pump set 200 is started, and the oil supply motor pump set 200 extracts hydraulic oil from the oil tank assembly 100 and conveys the hydraulic oil to the first check valve 320, the first flowmeter 330 and the first throttling valve 340 to reach the electro-hydraulic reversing valve 350. When the electro-hydraulic directional valve 350 is powered off, the port A361 is communicated with the port B362, and the oil pressure of the oil inlet and the oil outlet of the hydraulic element to be tested is balanced. For example, the hydraulic component to be measured is a cylinder, and at this time, a piston in the cylinder can move freely under the action of external force. When the electro-hydraulic directional valve 350 is powered on, hydraulic oil enters from an oil inlet of the electro-hydraulic directional valve 350 and flows out from an oil outlet, and finally reaches the working oil port a 361, at the moment, the port B362 is an oil return port, and hydraulic oil in the hydraulic element to be tested can flow back into the oil tank assembly 100 through the port B362. The hydraulic test bed can provide a test environment with adjustable oil pressure and controllable flow rate for the hydraulic element to be tested, so that the working state of the hydraulic element in a hydraulic system with given pressure and flow rate can be detected. The device is simple and convenient to operate, and meets the requirement of a test function.
In this embodiment, a return oil filter 390 is installed between the B port 362 and the tank assembly 100 in order to filter impurities in the hydraulic system. The fuel tank assembly 100 includes a fuel tank 110, an oil suction filter 120, a heater 130, a level sensor 140, a temperature sensor 150, an air filter 160, a level gauge 170, and an oil discharge ball valve 180. The temperature sensor 150 and the liquid level sensor 140 can monitor the oil temperature and the oil level in real time and form closed-loop control protection with other equipment. The first flow meter 330 is a turbine smart flow meter.
In addition, in order to test some hydraulic components with load-sensitive interfaces, in this embodiment, the oil supply motor-pump set 200 includes a motor 210 and an axial plunger pump 220, the axial plunger pump 220 has a pressure compensator (not shown), the pressure compensator has a control oil port 221, the test module 300 further includes an LS port 363 and a first electromagnetic valve 370, the first electromagnetic valve 370 is a two-position three-way valve, two oil inlets of the first electromagnetic valve 370 are respectively communicated with an oil outlet of the first throttle valve 340 and the LS port 363, and an oil outlet of the first electromagnetic valve 370 is communicated with the control oil port 221. When the first electromagnetic valve 370 is powered off, the oil outlet of the first throttle valve 340 is communicated with the control oil port 221; when the first solenoid valve 370 is energized, the LS port 363 communicates with the control oil port 221. The LS port 363 is used for connecting a load sensitive interface of a hydraulic element to be tested. When the system is switched into a working state, the pressure compensator senses the flow demand of the system and provides adjustable flow according to the flow demand when the working condition of the system changes. At the same time, the hydraulic pump is also capable of sensing and responding to the pressure demands of the hydraulic system. When the first solenoid valve 370 is energized, the apparatus may be used to test hydraulic components having load sensitive interfaces. In this embodiment, the motor 210 is a servo motor 210.
In order to control the flow rate of the oil more conveniently and more accurately, in the present embodiment, the first throttle valve 340 is a proportional throttle valve.
In addition, the test module 300 further includes a high pressure filter 380, and the high pressure filter 380 is installed on a pipeline between an output port of the oil supply motor-pump set 200 and an oil inlet of the first proportional relief valve 310.
In order to test the working state of the hydraulic element under the condition of bearing load, the hydraulic test bench further comprises a loading module 400, the loading module 400 comprises a first loading one-way valve 410, a second loading one-way valve 420, a third loading one-way valve 430, a fourth loading one-way valve 440, a second flow meter 450, a safety valve 460, a second overflow valve 470, a port C480 and a port D490, the port C480 is communicated with an oil outlet of the third loading one-way valve 430 and an oil inlet of the fourth loading one-way valve 440, the port D490 is communicated with an oil outlet of the first loading one-way valve 410 and an oil inlet of the second loading one-way valve 420, oil inlets of the safety valve 460 and the second overflow valve 470 are communicated with an oil outlet of the second loading one-way valve 420 and an oil outlet of the fourth loading one-way valve 440, and oil outlets of the safety valve 460 and the second overflow valve 470 are communicated with an oil inlet, The oil inlets of the fourth loading one-way valve 440 are communicated. The port C480 and the port D490 may be used as oil inlet and oil return separately or reversely. The working state of the hydraulic element to be tested under the hydraulic load can be simulated by adjusting the pressure set value of the second overflow valve 470. The safety valve 460 is used to prevent the system from failing, resulting in excessive pressure and damage to the test system. The pressure set point of relief valve 460 needs to be greater than the pressure set point of second spill valve 470. The second flow meter 450 is a turbine smart flow meter.
In order to control the load pressure value more conveniently and more accurately, in the scheme, the second overflow valve 470 is a proportional overflow valve.
In addition, the hydraulic component to be tested has a pilot port, and the pilot port of the hydraulic component needs to be tested by the test bench to test the working state when the pilot port is subjected to pilot pressure, and the hydraulic test bench further comprises a pilot module 500. The pilot module 500 includes a pilot port 510, a second check valve 520, a pressure reducing valve 530, and a solenoid directional valve 540. An oil inlet of the second check valve 520 is connected to a pipeline between the first proportional overflow valve 310 and the first check valve 320, and an oil outlet of the second check valve 520 is communicated with an oil inlet of the reducing valve 530. An oil outlet of the reducing valve 530 is connected with an oil inlet of the electromagnetic directional valve 540, and an oil outlet of the electromagnetic directional valve 540 is connected with the pilot oil port 510. The electromagnetic directional valve 540 is a two-position two-way valve, and when the electromagnetic directional valve 540 is powered off, the oil inlet and the oil outlet of the electromagnetic directional valve 540 are disconnected; when the electromagnetic directional valve 540 is powered on, the oil inlet and the oil outlet of the electromagnetic directional valve 540 are communicated.
In this scheme, hydraulic oil filters the back through high pressure filter 380, gets into the test module oil circuit all the way, and another way gets into guide's module oil circuit. After the oil pressure of the hydraulic oil in the pilot module oil path is reduced by the reducing valve 530, the hydraulic oil with the set pressure can be provided for the pilot port of the hydraulic element to be tested. The hydraulic oil is output to the electromagnetic directional valve 540 through the second check valve 520 and the pressure reducing valve 530. When the electromagnetic directional valve 540 is powered on, hydraulic oil flows to the oil outlet through the oil inlet of the electromagnetic directional valve 540 and is input into the pilot port of the hydraulic element to be tested through the pilot port.
In order to more accurately control the oil pressure input to the pilot port, in this embodiment, the pilot module 500 further includes a second proportional relief valve 550, an oil inlet of the second proportional relief valve 550 is connected to a pipeline between the pressure reducing valve 530 and the electromagnetic directional valve 540, and an oil outlet of the second proportional relief valve 550 is communicated with the oil tank assembly 100. The set oil pressure value of second proportional relief valve 550 is smaller than the set oil pressure value of pressure reducing valve 530. In addition, in a mode in which the pressure reducing valve 530 is combined with the proportional relief valve, stability of the pilot oil passage pressure can be maintained when the system pressure changes.
In this scheme, hydraulic test platform can also be used for detecting hydraulic component's interior volume of leaking, and hydraulic test platform still leaks module 600 including interior. The internal drain module 600 includes an internal drain port 610, a second solenoid valve 620, and a third flow meter 630. The second solenoid valve 620 is a two-position two-way valve, and the internal oil drainage port 610 is communicated with the oil tank assembly 100 through the second solenoid valve 620 and the third flow meter 630. When the second electromagnetic valve 620 is powered off, the oil inlet of the second electromagnetic valve 620 is communicated with the oil outlet; when the second electromagnetic valve 620 is powered on, the oil inlet and the oil outlet of the second electromagnetic valve 620 are disconnected. When the internal leakage amount of the hydraulic element needs to be detected, the second electromagnetic valve 620 is in a power-off state, the hydraulic element is connected to the internal oil drainage port 610, and the internal leakage amount and the internal leakage speed can be read through the third flow meter 630. The third flow meter 630 is a high-precision gear intelligent flow meter, can be used for monitoring tiny internal leakage of a hydraulic element, and is extremely high in precision and convenient to operate.
In order to expand the way of the hydraulic test bed for testing the internal leakage amount of the hydraulic component, in this embodiment, the internal leakage module 600 further includes a third solenoid valve 640 and a measuring cup 650. The third solenoid valve 640 is a two-position three-way valve, an oil inlet of the third solenoid valve 640 is connected with the inner oil drainage port 610, and two oil outlets of the third solenoid valve 640 are respectively connected to the second solenoid valve 620 and the measuring cup 650. When the third solenoid valve 640 is powered off, the inner oil drain port 610 is communicated with the second solenoid valve 620; when the third electromagnetic valve 640 is electrified, the inner oil drainage port 610 is communicated with the measuring cup 650. When the third electromagnetic valve 640 is electrified, internal leakage oil in the hydraulic element directly flows into the measuring cup 650 through the third electromagnetic valve 640, and specific internal leakage amount can be measured.
In addition, the hydraulic test bed further comprises a plurality of pressure sensors 700 and a plurality of pressure gauges 800, and the pressure sensors 700 and the pressure gauges 800 are installed on a pipeline of the hydraulic test bed. The pressure gauge 800 and the pressure sensor 700 can be used for monitoring the oil pressure values of all interfaces and all sections of oil ways in the hydraulic system in real time, so that the working state of the hydraulic test bed and the working state of a hydraulic element to be tested can be accurately known.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (11)
1. A hydraulic test stand is characterized in that the hydraulic test stand comprises:
the oil tank assembly is used for storing hydraulic oil;
an input port of the oil supply motor-pump set is communicated with the oil tank assembly and is used for outputting hydraulic oil;
the test module comprises a first proportional overflow valve, a first one-way valve, a first flowmeter, a first throttle valve, an electro-hydraulic directional valve, an A port and a B port, one end of the first proportional overflow valve is communicated with an output port of the oil supply motor pump set, the other end of the first proportional overflow valve is communicated with the oil tank assembly, an oil inlet of the first one-way valve is communicated with an oil inlet of the first proportional overflow valve, an oil outlet of the first one-way valve is communicated with an oil inlet of the first flowmeter, an oil outlet of the first flowmeter is communicated with an oil inlet of the first throttle valve, the A port and the B port are working oil ports, the electro-hydraulic directional valve is a two-position three-way valve, two oil inlets of the electro-hydraulic directional valve are respectively communicated with the oil outlet of the first throttle valve and the B port, and an oil outlet of the electro-hydraulic directional valve is communicated with the A port, when the electro-hydraulic reversing valve is powered off, the port A is communicated with the port B, when the electro-hydraulic reversing valve is powered on, the first throttling valve is communicated with the port A, and the port B is communicated with the oil tank assembly.
2. The hydraulic test bench of claim 1, wherein the oil supply motor pump set comprises a motor and an axial plunger pump, the axial plunger pump has a control oil port, the test module further comprises an LS port and a first electromagnetic valve, the first electromagnetic valve is a two-position three-way valve, two oil inlets of the first electromagnetic valve are respectively communicated with an oil outlet of the first throttle valve and the LS port, the oil outlet of the first electromagnetic valve is communicated with the control oil port, when the first electromagnetic valve is powered off, the oil outlet of the first throttle valve is communicated with the control oil port, and when the first electromagnetic valve is powered on, the LS port is communicated with the control oil port.
3. A hydraulic test rig according to claim 1, wherein the first choke is a proportional choke.
4. The hydraulic test bench of claim 1 wherein the test module further comprises a high pressure filter mounted on the line between the output port of the oil supply motor pump package and the oil inlet of the first proportional relief valve.
5. The hydraulic test bench of claim 1, further comprising a loading module, wherein the loading module comprises a first loading check valve, a second loading check valve, a third loading check valve, a fourth loading check valve, a second flow meter, a safety valve, a second overflow valve, a port C and a port D, the port C is communicated with an oil outlet of the third loading check valve and an oil inlet of the fourth loading check valve, the port D is communicated with an oil outlet of the first loading check valve and an oil inlet of the second loading check valve, oil inlets of the safety valve and the second overflow valve are communicated with an oil outlet of the second loading check valve and an oil outlet of the fourth loading check valve, and the oil outlets of the safety valve and the second overflow valve are communicated with an oil inlet of the second loading check valve through the second flow meter, And the oil inlets of the fourth loading one-way valves are communicated.
6. The hydraulic test rig of claim 5, wherein the second relief valve is a proportional relief valve.
7. The hydraulic test bench of claim 1, further comprising a pilot module, wherein the pilot module comprises a pilot oil port, a second check valve, a pressure reducing valve, and an electromagnetic directional valve, an oil inlet of the second check valve is connected to a pipeline between the first proportional overflow valve and the first check valve, an oil outlet of the second check valve is communicated with an oil inlet of the pressure reducing valve, an oil outlet of the pressure reducing valve is connected to an oil inlet of the electromagnetic directional valve, an oil outlet of the electromagnetic directional valve is connected to the pilot oil port, the electromagnetic directional valve is a two-position two-way valve, when the electromagnetic directional valve is powered off, the oil inlet and the oil outlet of the electromagnetic directional valve are disconnected, and when the electromagnetic directional valve is powered on, the oil inlet and the oil outlet of the electromagnetic directional valve are communicated.
8. The hydraulic test bench of claim 7, wherein the pilot module further comprises a second proportional overflow valve, an oil inlet of the second proportional overflow valve is connected to a pipeline between the pressure reducing valve and the electromagnetic directional valve, and an oil outlet of the second proportional overflow valve is communicated with the oil tank assembly.
9. The hydraulic test bed according to claim 1, further comprising an internal drainage module, wherein the internal drainage module comprises an internal oil drainage port, a second electromagnetic valve and a third flow meter, the second electromagnetic valve is a two-position two-way valve, the internal oil drainage port is communicated with the oil tank assembly through the second electromagnetic valve and the third flow meter, when the second electromagnetic valve is powered off, an oil inlet and an oil outlet of the second electromagnetic valve are communicated, and when the second electromagnetic valve is powered on, the oil inlet and the oil outlet of the second electromagnetic valve are disconnected.
10. The hydraulic test bed according to claim 9, wherein the internal drainage module further comprises a third solenoid valve and a measuring cup, the third solenoid valve is a two-position three-way valve, an oil inlet of the third solenoid valve is connected with the internal drainage port, two oil outlets of the third solenoid valve are respectively connected to the second solenoid valve and the measuring cup, when the third solenoid valve is powered off, the internal drainage port is communicated with the second solenoid valve, and when the third solenoid valve is powered on, the internal drainage port is communicated with the measuring cup.
11. The hydraulic test rig according to any of claims 1-10, further comprising a plurality of pressure sensors and a plurality of pressure gauges, the pressure sensors and the pressure gauges being mounted on the piping of the hydraulic test rig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020260515.6U CN211901162U (en) | 2020-03-05 | 2020-03-05 | Hydraulic test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020260515.6U CN211901162U (en) | 2020-03-05 | 2020-03-05 | Hydraulic test bed |
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| CN211901162U true CN211901162U (en) | 2020-11-10 |
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| CN202020260515.6U Active CN211901162U (en) | 2020-03-05 | 2020-03-05 | Hydraulic test bed |
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| CN (1) | CN211901162U (en) |
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2020
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 600, changta Road, Songjiang District, Shanghai, 201617 Patentee after: Shanghai shengkesisi Hydraulic Co.,Ltd. Address before: No. 600, changta Road, Songjiang District, Shanghai, 201617 Patentee before: SHANGHAI SUCCESS HYDRAULICS PRESS Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hydraulic test bench Effective date of registration: 20230105 Granted publication date: 20201110 Pledgee: Agricultural Bank of China Limited Shanghai Songjiang Sub-branch Pledgor: Shanghai shengkesisi Hydraulic Co.,Ltd. Registration number: Y2023980030417 |