CN218030557U

CN218030557U - Hydraulic system for testing performance of closed pump product based on open type hydraulic pump test bed

Info

Publication number: CN218030557U
Application number: CN202220590235.0U
Authority: CN
Inventors: 张超; 田晓庆; 孙杰; 吴桐
Original assignee: Yantai Eddie Precision Machinery Co Ltd
Current assignee: Yantai Eddie Precision Machinery Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-12-13
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a hydraulic system for testing the performance of a closed pump product based on an open hydraulic pump test bed, which comprises an open hydraulic pump test bed, wherein a torquemeter of the open hydraulic pump test bed is connected with an adapter which can be connected with input shafts of different tested closed pumps through a coupling; the function expansion oil way of the open type hydraulic pump test bed comprises a first flow meter, one end of the first flow meter is connected with an external oil port C, the other end of the first flow meter is connected with a loading overflow valve, the loading overflow valve is connected with a cooler, the cooler is connected with a high-pressure oil tank, and the high-pressure oil tank is connected with an external oil port D; and a DR port of a main pump of the tested closed-type pump is connected with a second flowmeter. Compared with the prior art, the utility model discloses can solve the problem that open pump test bench can't carry out the test of closed pump, realize open pump hydraulic test bench's function expansion, can satisfy in the essential capability test demand of closed hydraulic pump, simple structure, the practicality is strong, convenient to use.

Description

Hydraulic system for testing performance of closed pump product based on open type hydraulic pump test bed

Technical Field

The utility model relates to a closed hydraulic pump product performance test field, concretely relates to hydraulic system based on open hydraulic pump test bench test closed pump product performance.

Background

In the hydraulic application field, compared with the traditional open hydraulic system, the closed hydraulic system has the advantages of high efficiency, high integration level and the like, and is widely applied to the fields of aerospace, petroleum equipment, engineering machinery and the like at present. The high-speed development of the closed hydraulic system will inevitably accelerate the production and application of the closed pump. In order to ensure the product performance, the closed pump must be subjected to a performance test by using a closed pump test bed before the closed pump is installed and applied.

At present, open pump hydraulic test beds are widely used, and closed pump test beds are rapidly popularized. In order to solve the technical problem that the closed pump related performance test cannot be carried out on the existing open pump test bed, a typical closed pump test system is formed by combining various hydraulic elements, and the open pump test bed is used for carrying out related performance test on a typical closed pump 200 shown in the attached drawing. Therefore, traditional resources can be utilized, the production and test cost of the closed pump is effectively saved, and the hydraulic system for testing the product performance of the closed pump based on the open type hydraulic pump test bed is provided.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above technical problems or technical problems existing in the prior art, the utility model discloses a hydraulic system for testing the performance of a closed pump product based on an open type hydraulic pump test bed, which comprises an open type hydraulic pump test bed, and is different from the prior art that a torquer of the open type hydraulic pump test bed is connected with an adapter which can be matched with input shafts of different tested closed pumps through a coupling; the function expansion oil way of the open type hydraulic pump test bed comprises a first flow meter, one end of the first flow meter is connected with an external oil port C, the other end of the first flow meter is connected with a loading overflow valve, the loading overflow valve is connected with a cooler, the cooler is connected with a high-pressure oil tank, and the high-pressure oil tank is connected with an external oil port D; and a DR port of a main pump of the tested closed pump is connected with a second flowmeter.

Furthermore, a main oil port A of the tested closed pump is connected with an external oil port C or an external oil port D of the function expansion oil path of the open hydraulic pump test bed through a high-pressure hose, and a main oil port B of the tested closed pump is connected with the external oil port C or the external oil port D of the function expansion oil path of the open hydraulic pump test bed through the high-pressure hose.

Furthermore, a main oil port A and a main oil port B of the tested closed pump are provided with quick-connection jacks, and two ends of the high-pressure hose are provided with quick-connection plugs.

Further, a temperature sensor is additionally arranged on a pipeline between the first flowmeter and the loading overflow valve.

And further, a low-pressure overflow valve is additionally arranged on a pipeline between the high-pressure oil tank and the external oil port D.

Further, the low-pressure overflow valve has a variable adjusting function, and the setting range is 0 to 60bar.

Furthermore, the loading overflow valve has a variable adjusting function, and the setting range is 0 to 310bar.

Compared with the prior art, the utility model discloses can solve the problem that open pump test bench can't carry out the test of closed pump, realize open pump hydraulic test bench's function expansion, can satisfy in the essential capability test demand of closed hydraulic pump, simple structure, the practicality is strong, convenient to use.

Drawings

FIG. 1 shows a first operating mode of a hydraulic system diagram of the present invention;

fig. 2 is the utility model discloses a hydraulic system chart operating mode two.

Detailed Description

The hydraulic system diagram of the present invention will be combined below to clearly and completely describe the technical solution in the embodiment of the present invention, and obviously, the control mode of the measured closed pump product contains multiple control forms such as electric proportion, constant power, hydraulic control, mechanical control, etc., therefore the described embodiment is only a part of embodiments, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person without creative work are all included in the protection scope of the present invention.

A hydraulic system for testing the performance of closed pump products based on an open type hydraulic pump test bed comprises the open type hydraulic pump test bed 100, wherein a torquemeter 101 of the open type hydraulic pump test bed 100 is connected with an adapter 400 which can be connected and matched with input shafts of different tested closed pumps 200 through a coupler; the function expansion oil way 300 of the open type hydraulic pump test bed comprises a first flowmeter 301, one end of the first flowmeter 301 is connected with an external oil port C, the other end of the first flowmeter 301 is connected with a loading overflow valve 302, the loading overflow valve 302 is connected with a cooler 303, the cooler 303 is connected with a high-pressure oil tank 304, and the high-pressure oil tank 304 is connected with an external oil port D; the DR port of the main pump 201 of the tested closed-type pump 200 is connected with a second flowmeter 307. The main oil port A and the main oil port B of the tested closed pump 200 are provided with quick-connection jacks, and two ends of a high-pressure hose are provided with quick-connection plugs. A temperature sensor 305 is additionally arranged on a pipeline between the first flowmeter 301 and the loading overflow valve 302; a low-pressure overflow valve 306 is additionally arranged on a pipeline between the high-pressure oil tank 304 and the external oil port D; the low-pressure overflow valve 306 has a variable regulating function, so that the personal safety of operators is guaranteed, the pressure of the high-pressure oil tank 304 and the cooler 303 is limited and protected, and the set range is 0-60bar. The loading overflow valve 302 has a variable adjusting function, and the setting range is 0 to 310bar for guaranteeing the personal safety of operators.

As shown in fig. 1, the main oil port a of the tested closed pump 200 is connected to the external oil port C of the open hydraulic pump test bed function extension oil path 300 through a high-pressure hose, and the main oil port B of the tested closed pump 200 is connected to the external oil port D of the open hydraulic pump test bed function extension oil path 300 through a high-pressure hose. The main oil port A is an oil outlet, and the main oil port B is an oil inlet. This is condition one.

As shown in fig. 2, the main oil port a of the tested closed pump 200 is connected to the external oil port D of the open hydraulic pump test bed function extension oil path 300 through a high-pressure hose, and the main oil port B of the tested closed pump 200 is connected to the external oil port C of the open hydraulic pump test bed function extension oil path 300 through a high-pressure hose. The main oil port A is an oil inlet, and the main oil port B is an oil outlet. This is condition two.

In the closed pump 200 to be tested, reference numeral 201 denotes a main closed pump to be tested, which includes various control modes such as electric proportion, constant power, hydraulic control, mechanical control, and the like. The pump under test can be controlled by means of an open pump control signal. The reference numeral 202 is an oil replenishing pump, which is divided into a built-in type and an external type according to the installation structure, and is used for providing pilot pressure and closed oil way oil replenishing for a main pump variable servo piston. Reference numeral 203 denotes an oil supply pump relief valve, and the pressure adjustment methods are generally classified into a gasket adjustment type and a screw direct-acting type. A mark Ma and a mark Mb are system pressure measuring ports, a mark M3 is an oil supplementing pressure measuring port, and a mark M4 and a mark M5 are servo piston pressure measuring ports; and S is an oil suction port of an oil replenishing pump. The oil circuit can only flow in one direction, and the control signal is ensured to be correctly corresponding to the direction of the oil circuit.

In the open type hydraulic pump test bed function expansion oil way 300, a first flowmeter 301 is used for measuring the main flow; and the second flowmeter 307 is used for measuring the leakage amount of the shell or the oil supplementing flow rate in the middle position of the swash plate. The flowmeter is preferably a gear flowmeter, and the measuring range is ensured to be matched with the flow of the product to be measured, so that the flow measuring precision is ensured. The loading overflow valve 302 is used for simulating the loading of the host system; the low-pressure overflow valve 306 is used for adjusting the inlet pressure of a measured product, and simultaneously has the functions of flushing and overflowing the low-pressure area of the closed system and assisting the system in cooling. The cooler 303 is used for cooling a closed oil circuit, the rated working pressure is generally 60bar, and various cooling forms such as a water cooling machine or an independent oil cooling machine can be selected, so that the long-term stable operation of the system is guaranteed. The high-pressure oil tank 304 ensures stable oil supply of a tested product, and the auxiliary system is cooled, wherein the capacity is generally 200L to 300L. And the temperature sensor 305 is used for testing the temperature of the oil way of the system. The loading overflow valve and the low-pressure overflow valve are provided with overflow valve bases, so that the pipeline connection is facilitated. When the data acquisition instrument acquires data, the pressure sensor, the temperature sensor and the like which are matched with the data acquisition instrument are directly installed on the corresponding interface of the product to be detected. The usual measurement items and sensor specifications for pressure sensors are summarized below for reference. System pressure: 0 to 600bar; draining oil from the shell: 0-10bar; oil supplementing pressure: 0-60bar; servo pressure: 0 to 60bar.

The test process of the working condition I and the working condition II is the same: the tested closed pump is arranged behind the test bed, all input control signals of the pump are required to be cut off before starting test operation, and the shell is filled with filtered cleaning fluid pressure oil through a high-level oil return port on the shell; in order to ensure that the shell is always filled with hydraulic oil, the oil is drained by adopting an oil drainage port at the highest position on the shell.

Starting a closed pump test, and when oil supplementing pressure is established, keeping low-speed idle running for at least more than 30 seconds so as to facilitate air to be discharged out of the system; and continuing to increase to the normal speed to further exhaust the residual air in the system. After the operation is stable, the middle position of the swash plate is adjusted at first, the swash plate is ensured to be in the middle position, then the electric displacement control/hydraulic displacement control middle position adjustment and the like are carried out according to different control modes of the main pump, the oil supplementing pressure is collected at the pressure measuring port of the oil supplementing pump at the moment, the flow collected at the oil drainage port of the shell is the flow of the oil supplementing pump, and meanwhile, the pressure sensor is installed at the oil drainage port of the shell and used for collecting the shell pressure.

The closed pump of the built-in oil supply pump is tested, the pump is located at the middle position, the oil supply pressure is related to the shell pressure, and the actual set value of the oil supply overflow valve is obtained by subtracting the shell pressure from the oil supply pressure.

In the test process, corresponding signal control is carried out according to the control mode of the pump, the control method is used for controlling the swash plate swing angle variable of the main pump, and the control signals can be realized by means of related signals of an open type pump test bed.

The collected data, torque, rotating speed and other related data can be collected by means of an open pump test bed. The product test report can be completed by combining the data measured by the data acquisition instrument, and the research, development, manufacture, application and debugging requirements of the tested product are met.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A hydraulic system for testing the performance of closed pump products based on an open type hydraulic pump test bed comprises the open type hydraulic pump test bed (100), and is characterized in that a torque meter (101) of the open type hydraulic pump test bed (100) is connected with an adapter (400) which can be connected with input shafts of different tested closed pumps (200) through a coupler and is adaptive to the input shafts; the testing device is characterized by further comprising an open type hydraulic pump testing stand function expansion oil way (300), wherein the open type hydraulic pump testing stand function expansion oil way (300) comprises a first flowmeter (301), one end of the first flowmeter (301) is connected with an external oil port C, the other end of the first flowmeter is connected with a loading overflow valve (302), the loading overflow valve (302) is connected with a cooler (303), the cooler (303) is connected with a high-pressure oil tank (304), and the high-pressure oil tank (304) is connected with an external oil port D; the DR port of the main pump (201) of the tested closed-type pump (200) is connected with a second flowmeter (307).

2. The hydraulic system for testing the product performance of the closed pump based on the open hydraulic pump test bed as claimed in claim 1, wherein the main oil port a of the tested closed pump (200) is connected with the external oil port C or the external oil port D of the open hydraulic pump test bed function-extending oil path (300) through a high-pressure hose, and the main oil port B of the tested closed pump (200) is connected with the external oil port C or the external oil port D of the open hydraulic pump test bed function-extending oil path (300) through a high-pressure hose.

3. The hydraulic system for testing the product performance of the closed pump based on the open type hydraulic pump test bed as claimed in claim 1, wherein the main oil port A and the main oil port B of the tested closed pump (200) are provided with quick-connection jacks, and the two ends of the high-pressure hose are provided with quick-connection plugs.

4. The hydraulic system for testing the product performance of the closed pump based on the open hydraulic pump test bed as claimed in claim 1, wherein a temperature sensor (305) is additionally arranged on a pipeline between the first flowmeter (301) and the loading overflow valve (302).

5. The hydraulic system for testing the product performance of the closed pump based on the open hydraulic pump test bed as claimed in claim 1, wherein a low-pressure overflow valve (306) is additionally installed on a pipeline between the high-pressure oil tank (304) and the external oil port D.

6. The hydraulic system for testing the performance of the closed pump product based on the open hydraulic pump test bed as claimed in claim 5, wherein the low-pressure overflow valve (306) has a variable regulation function, and the setting range is 0-60bar.

7. The hydraulic system for testing the product performance of the closed pump based on the open hydraulic pump test bed as claimed in claim 1, wherein the loading overflow valve (302) has a variable regulation function, and the setting range is 0-310bar.