CN209761915U - Load sensing constant-pressure variable pump test device - Google Patents
Load sensing constant-pressure variable pump test device Download PDFInfo
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- CN209761915U CN209761915U CN201821754476.4U CN201821754476U CN209761915U CN 209761915 U CN209761915 U CN 209761915U CN 201821754476 U CN201821754476 U CN 201821754476U CN 209761915 U CN209761915 U CN 209761915U
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- 238000005057 refrigeration Methods 0.000 claims description 9
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- 238000013142 basic testing Methods 0.000 abstract description 2
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- 239000012530 fluid Substances 0.000 description 7
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- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a load response constant voltage variable pump test device, include: the oil tank provides oil for the load sensing constant-pressure variable pump; the temperature control assembly is used for changing the working environment temperature of the load sensing constant-pressure variable pump; the oil temperature control assembly is used for adjusting the temperature of oil in the oil tank; the outlet pressure adjusting assembly is used for controlling the pressure of the oil outlet of the load sensing constant-pressure variable pump; the control oil circuit is used for applying different set oil pressures to a control port of the load sensing constant-pressure variable pump; the motor is used for driving the load sensing constant-voltage variable pump; the torque and rotation speed sensor is used for detecting the torque and rotation speed output by the motor to the load induction constant-voltage variable pump. The utility model discloses can realize the basic test function of load response constant voltage variable pump.
Description
Technical Field
the utility model relates to a pump test field, in particular to load response constant voltage variable pump test device.
Background
compared with the traditional machinery, the hydraulic machinery has a series of advantages, is widely applied to engineering machinery equipment, the load sensitive pump is a product widely applied to the hydraulic field, can change the displacement by adjusting the angle of the swash plate, and has the main function of providing corresponding displacement according to the requirement of the system, thereby achieving the effect of saving energy on the premise of normal work of the whole system. For the load-sensitive pump, the working environment is harsh, the temperature is sometimes high or sometimes low, and the external temperature has a certain influence on the displacement, efficiency and variable characteristics of the load-sensitive pump, so that it is very necessary to explore the performance of the load-sensitive pump at different environmental temperatures.
The high and low temperature experiment effect of the load sensitive pump implemented at home and abroad is not ideal, the performance detection of the pump at high temperature and low temperature cannot be satisfied functionally, the structure is complex, the integration level is low, and the precision cannot meet the requirement, so that the high and low temperature performance detection efficiency of the load sensitive pump is low, the data reliability is low, and a large amount of manpower and material resources are required.
SUMMERY OF THE UTILITY MODEL
to the technical problem who exists among the prior art, the utility model aims at: a high and low temperature test device for a load-sensitive pump is provided.
The purpose of the utility model is realized through the following technical scheme: a load sensing constant voltage variable pump test device, comprising:
the oil tank provides oil for the load sensing constant-pressure variable pump;
the temperature control assembly is used for changing the working environment temperature of the load sensing constant-pressure variable pump;
The oil temperature control assembly is used for adjusting the temperature of oil in the oil tank;
The outlet pressure adjusting assembly is used for controlling the pressure of the oil outlet of the load sensing constant-pressure variable pump;
the control oil circuit is used for applying different set oil pressures to a control port of the load sensing constant-pressure variable pump;
the motor is used for driving the load sensing constant-voltage variable pump; and
And the torque and rotating speed sensor is used for detecting the torque and the rotating speed output by the motor to the load induction constant-pressure variable pump.
Preferably, the temperature control component includes box, asbestos and separates the box and adds the baffle in hot heat preservation chamber, test chamber, cold heat preservation chamber and refrigeration chamber, the asbestos sets up on the chamber wall in heating chamber, hot heat preservation chamber, test chamber, cold heat preservation chamber and refrigeration chamber, and the position that the box corresponds each baffle installation is seted up and is supplied baffle male fitting hole, load response constant voltage variable pump sets up in the test chamber.
preferably, the oil temperature control assembly includes a heater for heating the oil in the oil tank and a refrigerator for refrigerating the oil in the oil tank.
Preferably, the refrigerator includes stop valve, cooling system pump, cooler and the check valve that sets gradually along fluid direction of transfer, the stop valve sets up in refrigerator oil inlet department, and the check valve sets up in refrigerator oil outlet department for prevent during fluid from flowing into the refrigerator from the refrigerator oil-out.
Preferably, the outlet pressure adjusting assembly comprises a pilot overflow valve, an oil outlet flowmeter for detecting the flow of the oil outlet of the load sensing constant-pressure variable pump, and an oil outlet pressure gauge for detecting the oil pressure of the oil outlet of the load sensing constant-pressure variable pump, and the pilot overflow valve is connected with the oil outlet of the load sensing constant-pressure variable pump.
Preferably, the control oil path further comprises a throttle valve, the control oil path comprises a pressure control overflow valve and a control port pressure gauge for detecting the oil pressure applied by the control oil path to the control port of the load sensing constant-pressure variable pump, the control oil path is connected with the oil outlet of the load sensing constant-pressure variable pump through the throttle valve, the throttle valve is used for enabling the oil pressure in the control oil path not to be influenced by the oil pressure change of the oil outlet of the load sensing constant-pressure variable pump, and the pressure control overflow valve is arranged in the control oil path and is used for adjusting the oil pressure applied by the control oil path to the control port of.
preferably, the box body is provided with assembling grooves corresponding to the wall surfaces of the two ends of each assembling opening.
The utility model discloses for prior art have following advantage and effect:
1. The utility model has the advantages of simple structure, the integrated level is high, the test is accurate, the utility model discloses can realize the basic test function of load response constant voltage variable pump, the temperature of fluid and the operational environment who changes load response constant voltage variable pump when can accurate control is experimental.
2. The utility model discloses a torque moment of torsion tachometric sensor, oil absorption mouth manometer, oil absorption mouth flowmeter, oil-out manometer, oil-out flowmeter and control port manometer etc. can gather the measured signal in real time high-efficiently, and sensitivity is high, and data is accurate.
3. the utility model discloses can accurately explore each working property of load response constant voltage variable pump, including no-load discharge capacity, volumetric efficiency, total efficiency and variable characteristic.
4. The utility model discloses have the control by temperature change subassembly, can change the operational environment temperature that load response constant voltage variable pump was located in real time, probe load response constant voltage variable pump performance under the high low temperature environment and change.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
Fig. 2 is a schematic structural diagram of the temperature control assembly of the present invention;
Fig. 3 is a schematic structural diagram of the oil temperature control assembly of the present invention.
Detailed Description
the present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
a load sensing constant voltage variable pump test device, comprising: the device comprises an oil tank 1, a temperature control assembly, an oil temperature control assembly, an outlet pressure adjusting assembly, a control oil way 4, a motor 5 and a torque and rotation speed sensor 6;
The oil tank 1 provides oil for the load sensing constant-pressure variable pump 3;
The temperature control component is used for changing the working environment temperature of the load sensing constant-pressure variable pump 3;
The oil temperature control assembly is used for adjusting the temperature of oil in the oil tank 1;
the outlet pressure adjusting assembly is used for controlling the pressure of an oil outlet of the load sensing constant-pressure variable pump 3;
The control oil circuit 4 is used for applying different set oil pressures to a control port of the load sensing constant-pressure variable pump 3;
The motor 5 is used for driving the load sensing constant-voltage variable pump 3;
The torque/rotation speed sensor 6 detects the torque and rotation speed of the motor 5 output to the load sensing constant-pressure variable pump 3.
The oil suction port pressure gauge 7 and the oil suction port flowmeter 8 are also included;
The oil suction port pressure gauge 7 is used for detecting input oil pressure at an oil suction port of the load sensing constant-pressure variable pump 3 (namely, pressure at the oil suction port of the load sensing constant-pressure variable pump 3);
the intake flow meter 8 is used to detect the input flow at the intake of the load sensing constant pressure variable pump 3 (i.e., the flow at the intake of the load sensing constant pressure variable pump 3).
Can also set up air cleaner 27, level relay 28, thermometer 29 and oil tank stop valve 30 in oil tank 1, air cleaner 27 installs in the oil tank import for filter the air that gets into the oil tank, level relay 28 installs inside the oil tank, is used for measuring the inside fluid measure of oil tank, if the control of fluid measure insufficiency sends the warning, the pause test, thermometer 29 installs inside the oil tank, is used for the real-time measurement fluid temperature, and oil tank stop valve 30 installs in the oil tank bottom, is used for changing fluid.
a high-pressure filter 31 and an overload protection overflow valve 32 are arranged at an oil outlet of the load sensing constant-pressure variable pump 3, and an oil return filter 33 is arranged at an oil return port of the outlet pressure adjusting assembly.
Preferably, the temperature control subassembly includes box 11, asbestos and separates box 11 and adds the baffle 17 of heat chamber 12, heat preservation chamber 13, experimental chamber 14, cold preservation chamber 15 and refrigeration chamber 16, the asbestos is laid on the chamber wall of heating chamber 12, heat preservation chamber 13, experimental chamber 14, cold preservation chamber 15 and refrigeration chamber 16, and the position that box 11 corresponds each baffle 17 installation is seted up and is supplied 17 male assembly openings of baffle, load response constant voltage variable pump 3 sets up in experimental chamber 14.
The box 11 has seted up the assembly groove corresponding to the both sides of every baffle 17, and the baffle inserts the back from the assembly mouth, and the both sides of baffle assemble respectively in the assembly groove and slide along assembly groove length direction, until baffle bottom and box diapire face contact, a kerve also can be seted up to box diapire face, and the kerve can supply the baffle to insert, and the benefit that sets up like this lies in can playing better isolation effect.
Preferably, the oil temperature control assembly includes a heater 18 for heating the oil in the oil tank 1 and a refrigerator for refrigerating the oil in the oil tank 1.
preferably, the refrigerator includes a stop valve 19, a cooling system pump 20, a cooler 21 and a check valve 22 sequentially arranged along a transfer direction of the oil, the stop valve 19 is arranged at an oil inlet of the refrigerator, and the check valve 22 is arranged at an oil outlet of the refrigerator for preventing the oil from flowing into the refrigerator from the oil outlet of the refrigerator.
Preferably, the outlet pressure adjusting assembly comprises a pilot overflow valve 23, an oil outlet flowmeter 10 for detecting the flow of the oil outlet of the load sensing constant-pressure variable pump 3, and an oil outlet pressure gauge 9 for detecting the oil pressure of the oil outlet of the load sensing constant-pressure variable pump 3, and the pilot overflow valve 23 is connected with the oil outlet of the load sensing constant-pressure variable pump 3. The oil outlet pressure gauge 9 is used for detecting the pressure at the oil outlet of the load sensing constant-pressure variable pump 3; the oil outlet flowmeter 10 is used for detecting the flow at the oil outlet of the load sensing constant-pressure variable pump 3.
Preferably, the control device further comprises a throttle valve 24, the control oil path 4 comprises a pressure control overflow valve 25 and a control port pressure gauge 26 for detecting the oil pressure applied by the control oil path 4 to the control port of the load sensing constant pressure variable pump 3, the control oil path 4 is connected with the oil outlet of the load sensing constant pressure variable pump 3 through the throttle valve 24, the throttle valve 24 enables oil at the oil outlet of the load sensing constant pressure variable pump 3 to flow into the control oil path 4 and also enables the oil pressure in the control oil path 4 not to be influenced by the oil pressure change at the oil outlet of the load sensing constant pressure variable pump 3, and the pressure control overflow valve 25 is arranged in the control oil path 4 and is used for adjusting the oil pressure applied by the control oil path 4 to the control port of the load sensing constant pressure.
a method for testing a load sensing constant voltage variable pump using any one of the above load sensing constant voltage variable pump test devices, comprising: an unloaded displacement test and/or a volumetric efficiency test and/or a total efficiency test;
And (3) no-load discharge capacity test: the pilot overflow valve of the outlet pressure adjusting assembly is used for setting the pressure of an oil outlet of the load sensing constant-pressure variable pump to be no-load, the motor is started to adjust the rotating speed of the load sensing constant-pressure variable pump to a set rotating speed, and the output flow q of the load sensing constant-pressure variable pump at the moment is measuredv2,iThe torque speed sensor detects the speed n of the load sensing constant-pressure variable pump at the momentiCalculating the no-load displacement V of the load sensing constant-pressure variable pump by a formula I2,i；
The formula I is as follows:
with the measured no-load displacement V per unit time2,iComparing the displacement with the set standard no-load displacement so as to judge whether the load sensing constant-pressure variable pump meets the requirement or not;
Volumetric efficiency test: the starting motor adjusts the rotating speed of the load sensing constant-pressure variable pump to a set rotating speed, a pilot overflow valve of the outlet pressure adjusting assembly is adjusted to enable the pressure of an oil outlet of the load sensing constant-pressure variable pump to reach a set pressure, and the output flow q of the load sensing constant-pressure variable pump at the moment is measuredv2,eThe torque speed sensor detects the speed n of the load sensing constant-pressure variable pump at the momenteCalculating the volumetric efficiency eta of each point of the load sensing constant-pressure variable pump by a formula IIv：
The formula II is as follows:
if the rotating speed of different load sensing constant-pressure variable pumps needs to be measured and/or the volumetric efficiency under the pressure of the oil outlet of the load sensing constant-pressure variable pump needs to be adjusted, repeating the volumetric efficiency test after correspondingly changing the rotating speed and/or the pressure of the oil outlet of the load sensing constant-pressure variable pump;
And (3) testing the total efficiency: starting the motor to adjust the rotation speed of the load sensing constant-pressure variable pump to a set rotation speed, adjusting a pilot overflow valve of an outlet pressure adjusting assembly to enable the pressure of an oil outlet of the load sensing constant-pressure variable pump to reach a set pressure, and measuring the input oil pressure p of an oil suction port of the load sensing constant-pressure variable pump at the moment1,eAnd the input flow qv1,eMeasuring the output oil pressure p of the output load sensing constant pressure variable pump2,eAnd the output flow qv2,ethe torque and rotation speed sensor measures the input torque T and rotation speed n of the input load sensing constant-voltage variable pump, and the total efficiency eta of each point of the load sensing constant-voltage variable pump is calculated by a formula IIIt；
The formula III is as follows:
if the rotating speed of different load sensing constant-pressure variable pumps needs to be measured and/or the total efficiency under the pressure of the oil outlet of the load sensing constant-pressure variable pump needs to be adjusted, the volumetric efficiency test is repeated after the rotating speed and/or the pressure of the oil outlet of the load sensing constant-pressure variable pump are correspondingly changed;
variable property test: starting a motor to adjust the rotating speed of the load sensing constant-pressure variable pump to a set rotating speed, adjusting a pilot overflow valve of an outlet pressure adjusting assembly to enable the pressure of an oil outlet of the load sensing constant-pressure variable pump to be gradually increased from no-load to maximum pressure, then gradually recovering from the maximum pressure to a no-load state, and simultaneously measuring and detecting the output oil pressure p of the load sensing constant-pressure variable pump in the process2,eand the output flow qv2,eDrawing flow-pressure characteristic curves under different regulated oil outlet pressures;
Starting the motor to adjust the rotation speed of the load sensing constant-pressure variable pump to a set rotation speed, adjusting a pilot overflow valve of an outlet pressure adjusting assembly to enable the pressure of an oil outlet of the load sensing constant-pressure variable pump to be gradually increased from an idle state to a maximum pressure, adjusting a control oil way to enable the control oil way to apply a load sensing constant-pressure variable to a load sensing constant-pressure variableafter the pressure of the control port of the metering pump reaches the set pressure, a pilot overflow valve of an outlet pressure adjusting assembly adjusts the pressure of an oil outlet of the load sensing constant-pressure variable pump to gradually decrease from the maximum to the no-load state and gradually increase from the no-load state to the maximum pressure, and the output oil pressure p is measured in the test process2,eAnd the output flow qv2,eand drawing a flow-pressure characteristic curve under different pressures applied to the control port of the load sensing constant-pressure variable pump.
preferably, the temperature control assembly comprises a box body, asbestos and partition plates for partitioning the box body into a heating cavity, a heat preservation cavity, a test cavity, a cold preservation cavity and a refrigeration cavity, the asbestos is arranged on the cavity walls of the heating cavity, the heat preservation cavity, the test cavity, the cold preservation cavity and the refrigeration cavity, assembling ports for inserting the partition plates are formed in the positions, corresponding to the connection of the partition plates, of the box body, and the load sensing constant-pressure variable pump is arranged in the test cavity;
when a load sensing constant-pressure variable pump is required to perform a high-temperature test, the partition plates between the refrigeration cavity and the cold heat preservation cavity and between the cold heat preservation cavity and the test cavity are closed, the temperature control assembly is started to enable the heating cavity to reach a set temperature, then the partition plates between the heating cavity and the heat preservation cavity and between the heat preservation cavity and the test cavity are opened to enable the heating cavity to be communicated with the test cavity, and the test cavity is heated to the set temperature to perform a high-temperature test;
When the load sensing constant-pressure variable pump is required to perform low-temperature test, the partition plates between the heating cavity and the heat insulation cavity and between the heat insulation cavity and the test cavity are closed, the temperature control assembly is opened to enable the refrigerating cavity to reach the set temperature, then the partition plates between the refrigerating cavity and the cold insulation cavity and between the cold insulation cavity and the test cavity are opened to enable the refrigerating cavity to be communicated with the test cavity, and the test cavity is cooled to the set temperature to perform low-temperature test.
A detection method of a load sensing constant-pressure variable pump comprises the following steps: an unloaded displacement test and/or a volumetric efficiency test and/or a total efficiency test;
And (3) no-load discharge capacity test: the test pressure is no-load, the rotating speed of the load sensing constant-pressure variable pump is adjusted to a set rotating speed, and the output flow q is measured when the no-load pressure of the oil outlet of the load sensing constant-pressure variable pump is measuredv2,iConstant with load inductionSpeed n of no-load pressure of pressure variable pumpiCalculating the no-load displacement V of the load sensing constant-pressure variable pump by the formula 12,i；
Equation 1:
Volumetric efficiency test: adjusting the rotation speed of the load sensing constant-pressure variable pump to a set rotation speed, and measuring the output flow q when the no-load pressure of the oil outlet of the load sensing constant-pressure variable pump is measuredv2,eSpeed n of no-load pressure of constant-pressure variable pump sensed by loadecalculating the volumetric efficiency eta of the load sensing constant-pressure variable pump by the formula 2v；
equation 2:
if the rotating speed of different load sensing constant-pressure variable pumps needs to be measured and/or the volumetric efficiency under the pressure of the oil outlet of the load sensing constant-pressure variable pump needs to be adjusted, repeating the volumetric efficiency test after correspondingly changing the rotating speed and/or the pressure of the oil outlet of the load sensing constant-pressure variable pump;
Will obtain a volumetric efficiency ηvComparing with the set standard volumetric efficiency so as to judge whether the load sensing constant-pressure variable pump meets the requirement or not;
And (3) testing the total efficiency: adjusting the rotating speed of the load sensing constant-pressure variable pump to a set rotating speed in a test, adjusting the pressure of an oil outlet of the load sensing constant-pressure variable pump, and measuring the input oil pressure p of an oil suction port of the load sensing constant-pressure variable pump1,eand the input flow qv1,eMeasuring the output oil pressure p of the output load sensing constant pressure variable pump2,eAnd the output flow qv2,eMeasuring the input torque T and the rotating speed n of the input load sensing constant-pressure variable pump, and calculating the total efficiency eta of each point of the load sensing constant-pressure variable pump by a formula 3t；
Equation 3:
If the rotating speed of different load sensing constant-pressure variable pumps needs to be measured and/or the total efficiency under the pressure of the oil outlet of the load sensing constant-pressure variable pump needs to be adjusted, the volumetric efficiency test is repeated after the rotating speed and/or the pressure of the oil outlet of the load sensing constant-pressure variable pump are correspondingly changed;
the total efficiency eta to be obtainedtcomparing the total efficiency with a set standard so as to judge whether the load sensing constant-pressure variable pump meets the requirement or not;
variable property test: adjusting the rotating speed of the load sensing constant-pressure variable pump to a set rotating speed in a test, gradually increasing the pressure of an oil outlet of the load sensing constant-pressure variable pump from an idle state to a maximum pressure, then gradually recovering the pressure from the maximum pressure to the idle state, and detecting the output oil pressure p of the load sensing constant-pressure variable pump in the test process2,eAnd the output flow qv2,edrawing flow-pressure characteristic curves under different regulated oil outlet pressures;
adjusting the rotating speed of a load sensing constant-pressure variable pump to a set rotating speed for a test, gradually increasing the pressure of an oil outlet of the load sensing constant-pressure variable pump from an idle state to a maximum pressure, gradually decreasing the pressure of the oil outlet of the load sensing constant-pressure variable pump from the maximum to the idle state after adjusting the pressure applied to a control port of the load sensing constant-pressure variable pump to the set pressure, then gradually increasing the pressure of the oil outlet from the idle state to the maximum pressure of the oil outlet, and measuring the output oil pressure p in the test process2,eAnd the output flow qv2,eDrawing a flow-pressure characteristic curve under different pressures applied to a control port of the load sensing constant-pressure variable pump;
if the variable characteristics under different pressures applied to the control port of the load sensing constant-pressure variable pump and/or different rotating speeds of the load sensing constant-pressure variable pump need to be measured, repeating the variable characteristic test after correspondingly changing the pressures applied to the control port of the load sensing constant-pressure variable pump and/or the rotating speeds of the load sensing constant-pressure variable pump;
and comparing the drawn flow-pressure characteristic curve with a set standard flow-pressure characteristic curve so as to judge whether the load sensing constant-pressure variable pump meets the requirement.
the above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (6)
1. The utility model provides a load response constant voltage variable pump test device which characterized in that includes:
The oil tank provides oil for the load sensing constant-pressure variable pump;
The temperature control assembly is used for changing the working environment temperature of the load sensing constant-pressure variable pump;
The oil temperature control assembly is used for adjusting the temperature of oil in the oil tank;
The outlet pressure adjusting assembly is used for controlling the pressure of the oil outlet of the load sensing constant-pressure variable pump;
The control oil circuit is used for applying different set oil pressures to a control port of the load sensing constant-pressure variable pump;
The motor is used for driving the load sensing constant-voltage variable pump; and
The torque and rotating speed sensor is used for detecting the torque and rotating speed output by the motor to the load induction constant-voltage variable pump;
the temperature control assembly comprises a box body, asbestos and a partition plate for separating the box body into a heating cavity, a heat insulation cavity, a test cavity, a cold insulation cavity and a refrigeration cavity, wherein the asbestos is arranged on the wall of the heating cavity, the heat insulation cavity, the test cavity, the cold insulation cavity and the refrigeration cavity, the position of the box body corresponding to the installation of each partition plate is provided with an assembly port for inserting the partition plate, and the load sensing constant-pressure variable pump is arranged in the test cavity.
2. The load sensing constant pressure variable pump test device as claimed in claim 1, wherein the oil temperature control assembly comprises a heater for heating the oil in the oil tank and a refrigerator for refrigerating the oil in the oil tank.
3. The load sensing constant pressure variable pump test device as claimed in claim 2, wherein the refrigerator includes a stop valve, a cooling system pump, a cooler, and a check valve, which are sequentially disposed along the oil transfer direction, the stop valve being disposed at an oil inlet of the refrigerator, and the check valve being disposed at an oil outlet of the refrigerator for preventing the oil from flowing into the refrigerator from the oil outlet of the refrigerator.
4. The load sensing constant pressure variable pump test device according to claim 1, wherein the outlet pressure regulating assembly comprises a pilot operated overflow valve, an outlet flow meter for detecting the flow of the outlet of the load sensing constant pressure variable pump, and an outlet pressure gauge for detecting the oil pressure at the outlet of the load sensing constant pressure variable pump, the pilot operated overflow valve being connected to the outlet of the load sensing constant pressure variable pump.
5. The load sensing constant pressure variable pump test device according to claim 1, further comprising a throttle valve, wherein the control oil path comprises a pressure control relief valve and a control port pressure gauge for detecting the amount of oil pressure applied by the control oil path to the control port of the load sensing constant pressure variable pump, the control oil path is connected to the oil outlet of the load sensing constant pressure variable pump through the throttle valve, the throttle valve is used for preventing the oil pressure in the control oil path from being affected by the change of the oil pressure of the oil outlet of the load sensing constant pressure variable pump, and the pressure control relief valve is disposed in the control oil path and is used for adjusting the amount of oil pressure applied by the control oil path to the control port of the load sensing constant pressure.
6. the apparatus of claim 1, wherein the housing has mounting grooves formed on the wall surfaces of the housing at opposite ends thereof corresponding to the mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754476.4U CN209761915U (en) | 2018-10-26 | 2018-10-26 | Load sensing constant-pressure variable pump test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754476.4U CN209761915U (en) | 2018-10-26 | 2018-10-26 | Load sensing constant-pressure variable pump test device |
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| Publication Number | Publication Date |
|---|---|
| CN209761915U true CN209761915U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821754476.4U Withdrawn - After Issue CN209761915U (en) | 2018-10-26 | 2018-10-26 | Load sensing constant-pressure variable pump test device |
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| CN (1) | CN209761915U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185275A (en) * | 2018-10-26 | 2019-01-11 | 华南理工大学 | Load sensitive pump high-low temperature tester and its application method, detection method |
| CN114483715A (en) * | 2022-02-22 | 2022-05-13 | 杭叉集团股份有限公司 | Hydraulic gear pump test device and test method |
-
2018
- 2018-10-26 CN CN201821754476.4U patent/CN209761915U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185275A (en) * | 2018-10-26 | 2019-01-11 | 华南理工大学 | Load sensitive pump high-low temperature tester and its application method, detection method |
| CN109185275B (en) * | 2018-10-26 | 2024-01-09 | 华南理工大学 | Load-sensing constant-pressure variable pump test device, use method and detection method thereof |
| CN114483715A (en) * | 2022-02-22 | 2022-05-13 | 杭叉集团股份有限公司 | Hydraulic gear pump test device and test method |
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