CN216518976U - Test bed for hydraulic motor, hydraulic pump and rear axle - Google Patents
Test bed for hydraulic motor, hydraulic pump and rear axle Download PDFInfo
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- CN216518976U CN216518976U CN202023032401.5U CN202023032401U CN216518976U CN 216518976 U CN216518976 U CN 216518976U CN 202023032401 U CN202023032401 U CN 202023032401U CN 216518976 U CN216518976 U CN 216518976U
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Abstract
The application discloses a test bench for hydraulic motor, hydraulic pump and rear axle relates to transmission test bench technical field. The test bench includes: a prime mover, a low power variable hydraulic pump/motor, a rear axle, a high power variable hydraulic pump/motor, and an electronic control unit. The technical principle of the application is to utilize the energy complementation principle of the hydraulic pump and the hydraulic motor. The hydraulic energy output by the high-power variable hydraulic pump is transmitted to the high-power variable hydraulic motor, and the mechanical energy converted by the high-power variable hydraulic motor is transmitted to the high-power variable hydraulic pump through the rear axle chain wheel set. The transmission loss of the high-power variable hydraulic pump/motor is supplemented by a low-power variable hydraulic motor, and the hydraulic energy of the low-power variable hydraulic motor is provided by the prime mover and the low-power variable hydraulic pump. The hydraulic testing device can simultaneously test two high-power hydraulic motors and hydraulic pumps and two low-power hydraulic motors and hydraulic pumps and also has a rear axle, and energy consumption is low.
Description
Technical Field
The application relates to the technical field of transmission test beds, in particular to a test bed for a hydraulic motor, a hydraulic pump and a rear axle.
Background
The working environment of the hydraulic pump and the hydraulic motor has strict requirements and the reliability of the product itself has strict requirements, so the performance and parameters of each hydraulic motor and each hydraulic pump are checked by a test bench. The test is usually carried out by driving a hydraulic motor or pump by means of a prime mover. The performance test of the hydraulic motor and the hydraulic pump comprises the following steps: rated working pressure, highest working pressure, rated rotating speed, highest working rotating speed, rated power, maximum power, volumetric efficiency, total efficiency and the like.
In recent years, along with the gradual increase of the power of a hydraulic motor and a hydraulic pump, the power consumption of a test bed for testing the performance and parameters of the hydraulic motor and the hydraulic pump is also gradually increased, and particularly, the test bed for the megawatt hydraulic motor and the hydraulic pump has continuous and large energy consumption day and night. Therefore, the high energy consumption of the high-power test bed becomes a burden for enterprises.
Therefore, it is highly desirable to develop a test bench for hydraulic motors and hydraulic pumps that can effectively reduce energy consumption.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.
The application provides a test bench for hydraulic motor, hydraulic pump and rear axle, include: the hydraulic control system comprises a prime motor, a low-power variable hydraulic pump, a low-power variable hydraulic motor, a rear axle, a high-power variable hydraulic pump, a high-power variable hydraulic motor, an electric control unit, a large/small chain wheel, a first-fourth hydraulic servo valve, a first-second electromagnetic unloading valve, a first-second overflow valve, a first-second pressurizing oil tank, a first-second pressure sensor and a first-fourth torque rotating speed sensor; wherein the content of the first and second substances,
the main shaft of the low-power variable hydraulic pump is connected with an output shaft of a prime motor through a first torque rotating speed sensor, a high-pressure oil pipe connected with the low-power variable hydraulic pump is connected with a first pressure sensor, a first overflow valve, a first electromagnetic unloading valve, a first hydraulic servo valve, a second hydraulic servo valve and a low-power variable hydraulic motor in parallel, an oil outlet pipe of the low-power variable hydraulic motor is connected with a first pressurizing oil tank, the first pressurizing oil tank is connected with an oil inlet pipe of the low-power variable hydraulic pump, and the main shaft of the low-power variable hydraulic motor is connected with an input shaft of a rear axle through a second torque rotating speed sensor;
the high-pressure variable hydraulic pump comprises a rear axle, a high-power variable hydraulic pump and a high-power variable hydraulic motor, wherein an output shaft at one end of the rear axle is connected with the high-power variable hydraulic pump through a fourth torque rotating speed sensor, an output shaft at the other end of the rear axle is connected with a large chain wheel, the large chain wheel is connected with a small chain wheel through a chain, a spline shaft connected with the small chain wheel is connected with a main shaft of the high-power variable hydraulic motor through a third torque rotating speed sensor, a high-pressure oil pipe connected with the high-power variable hydraulic pump is connected with a third hydraulic servo valve, a second overflow valve, a second electromagnetic unloading valve, a fourth hydraulic servo valve, a second pressure sensor and the high-power variable hydraulic motor in parallel, an oil outlet pipe of the high-power variable hydraulic motor is connected with a second pressurizing oil tank, and the second pressurizing oil tank is connected with an oil inlet pipe of the high-power variable hydraulic pump;
the control pipelines of the first hydraulic servo valve, the second hydraulic servo valve, the third hydraulic servo valve and the fourth hydraulic servo valve are respectively connected with the servo pipelines of the corresponding low-power variable hydraulic pump, the corresponding low-power variable hydraulic motor, the corresponding high-power variable hydraulic pump and the corresponding high-power variable hydraulic motor;
the electronic control unit is provided with an input signal circuit and an output signal circuit, the input signal circuit is connected with a first pressure sensor, a second pressure sensor, a first torque rotating speed sensor, a second torque rotating speed sensor, a third torque rotating speed sensor and a fourth torque rotating speed sensor, and the output signal circuit is connected with a first hydraulic servo valve, a second hydraulic servo valve, a third hydraulic servo valve, a fourth hydraulic servo valve, a first electromagnetic unloading valve and a second electromagnetic unloading valve.
Optionally, a first filter and a first cooler are connected in series between the oil outlet pipe of the low-power variable hydraulic motor and the first pressurizing oil tank in sequence.
Optionally, a second filter and a second cooler are connected in series between an oil outlet pipe of the high-power variable hydraulic motor and the second pressurizing oil tank in sequence.
Optionally, each electromagnetic unloading valve is a pilot type electromagnetic unloading valve.
Optionally, each relief valve is a pilot-type relief valve.
Optionally, each hydraulic servo valve is an electro-hydraulic servo valve or a moving coil servo valve.
Optionally, the rear axle is a motor vehicle rear axle.
The technical principle of the test bed for the hydraulic motor, the hydraulic pump and the rear axle is the energy complementation principle of the hydraulic pump and the hydraulic motor. The working principle is that the hydraulic energy output by the high-power variable hydraulic pump is transmitted to the high-power variable hydraulic motor, and the mechanical energy converted by the high-power variable hydraulic motor is transmitted to the high-power variable hydraulic pump through the rear axle chain wheel set. The transmission loss of the high-power variable hydraulic pump and the high-power variable hydraulic motor is supplemented by a low-power variable hydraulic motor, and the hydraulic energy of the low-power variable hydraulic motor is provided by the prime mover and the low-power variable hydraulic pump. Therefore, the test bed provided by the application is a working method which can be achieved by taking five steps at a time, the test bed can be used for simultaneously testing the high-power variable hydraulic motor, the high-power variable hydraulic pump, the low-power variable hydraulic motor, the low-power variable hydraulic pump and the rear axle, and the energy consumption is low.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a test stand for a hydraulic motor, hydraulic pump and rear axle according to one embodiment of the present application.
The symbols in the drawings represent the following meanings:
the system comprises a prime motor 1, a first torque rotating speed sensor 2, a low-power variable hydraulic pump 3, a first hydraulic servo valve 4, a second hydraulic servo valve 5, a first pressure sensor 6, a first electromagnetic unloading valve 7, a low-power variable hydraulic motor 8, a second torque rotating speed sensor 9, a rear axle 10, a first filter 11, a first cooler 12, a first pressurizing oil tank 13, a large chain wheel 14, a high-power variable hydraulic motor 15, a third torque rotating speed sensor 16, a small chain wheel 17, a fourth hydraulic servo valve 18, a second pressure sensor 19, a second electromagnetic unloading valve 20, a high-power variable hydraulic pump 21, a fourth torque rotating speed sensor 22, a second overflow valve 23, a third hydraulic servo valve 24, a second filter 25, a second cooler 26, a second oil tank 27, a first overflow valve 28 and an electronic control unit 29.
Detailed Description
FIG. 1 is a schematic block diagram of a test stand for a hydraulic motor, hydraulic pump and rear axle according to one embodiment of the present application. In fig. 1, a thin solid line indicates a high-pressure oil pipe, a broken line indicates a control line, and a two-dot chain line indicates a low-pressure line.
As shown in fig. 1, the present embodiment provides a test bench for a hydraulic motor, a hydraulic pump and a rear axle, which includes a prime mover 1, a rear axle 10, a large chain wheel 14, a small chain wheel 17, a first hydraulic servo valve 4, a second hydraulic servo valve 5, a third hydraulic servo valve 24, a fourth hydraulic servo valve 18, a first electromagnetic unloading valve 7, a first overflow valve 28, a second electromagnetic unloading valve 20, a second overflow valve 23, a low power variable hydraulic pump 3, a low power variable hydraulic motor 8, a high power variable hydraulic pump 21, a high power variable hydraulic motor 15, a first cooler 12, a first filter 11, a first pressurized oil tank 13, a second cooler 26, a second filter 25, a second pressurized oil tank 27, a first pressure sensor 6, a second pressure sensor 19, a first torque speed sensor 2, a second torque speed sensor 9, a third torque speed sensor 16, A fourth torque speed sensor 22 and an electronic control unit 29. Wherein, the main shaft of the low-power variable hydraulic pump 3 is connected with the output shaft of the prime mover 1 through a first torque and rotation speed sensor 2. The high-pressure oil pipe connected with the low-power variable hydraulic pump 3 is connected with a first pressure sensor 6, a first overflow valve 28, a first electromagnetic unloading valve 7, a first hydraulic servo valve 4, a second hydraulic servo valve 5 and a low-power variable hydraulic motor 8 in parallel. The oil outlet pipe of the low-power variable hydraulic motor 8 is sequentially connected with a first filter 11 and a first cooler 12 in series and is connected to a first pressurizing oil tank 13. The first pressurized oil tank 13 is connected with an oil inlet pipe of the low-power variable hydraulic pump 3. The main shaft of the low-power variable hydraulic motor 8 is connected with the input shaft of a rear axle 10 through a second torque and rotation speed sensor 9. An output shaft at one end of the rear axle 10 is connected with a high-power variable hydraulic pump 21 through a fourth torque and rotating speed sensor 22, and an output shaft at the other end of the rear axle 10 is connected with a large chain wheel 14. The large sprocket 14 is connected to the small sprocket 17 by a chain. The spline shaft connected with the small chain wheel 17 is connected with the main shaft of the high-power variable hydraulic motor 15 through a third torque and rotating speed sensor 16. The high-pressure oil pipe connected with the high-power variable hydraulic pump 21 is connected with a third hydraulic servo valve 24, a second overflow valve 23, a second electromagnetic unloading valve 20, a fourth hydraulic servo valve 18, a second pressure sensor 19 and a high-power variable hydraulic motor 15 in parallel. The oil outlet pipe of the high-power variable hydraulic motor 15 is connected with a second filter 25 and a second cooler 26 in series in sequence and is connected with a second pressurizing oil tank 27. The second pressurized oil tank 27 is connected to an oil inlet pipe of the high power variable hydraulic pump 21. The control pipeline of the first hydraulic servo valve 4 is connected with the servo pipeline of the low-power variable hydraulic pump 3. And a control pipeline of the second hydraulic servo valve 5 is connected with a servo pipeline of a low-power variable hydraulic motor 8. The control pipeline of the third hydraulic servo valve 24 is connected with the servo pipeline of the high-power variable hydraulic pump 21. The control line of the fourth hydraulic servo valve 18 is connected with the servo line of the high power variable hydraulic motor 15. The low-pressure pipelines of the first hydraulic servo valve 4 and the second hydraulic servo valve 5 are respectively connected with a first pressurizing oil tank 13. The low-pressure pipelines of the third hydraulic servo valve 24 and the fourth hydraulic servo valve 18 are respectively connected with a second pressurized oil tank 27. The electronic control unit 29 has input and output signal circuits. An input signal circuit of the electronic control unit 29 is connected with the first pressure sensor 6, the second pressure sensor 19, the first torque rotating speed sensor 2, the second torque rotating speed sensor 9, the third torque rotating speed sensor 16 and the fourth torque rotating speed sensor 22, and an output signal circuit of the electronic control unit 29 is connected with the first hydraulic servo valve 4, the second hydraulic servo valve 5, the third hydraulic servo valve 24, the fourth hydraulic servo valve 18, the first electromagnetic unloading valve 7 and the second electromagnetic unloading valve 20.
Working process
As shown in fig. 1: the prime motor 1 is started, and the first electromagnetic unloading valve 7 and the second electromagnetic unloading valve 20 are controlled by the electronic control unit 29 to enter a working state. The electronic control unit 29 controls the first hydraulic servo valve 4, the second hydraulic servo valve 5, the third hydraulic servo valve 24 and the fourth hydraulic servo valve 18 to correspondingly adjust the displacements of the low-power variable hydraulic pump 3, the low-power variable hydraulic motor 8, the high-power variable hydraulic pump 21 and the high-power variable hydraulic motor 15 to enter corresponding working states according to specific test programs. The low-power variable hydraulic pump 3 absorbs and converts the mechanical energy of the prime mover 1 into hydraulic energy, and the hydraulic energy is input to the low-power variable hydraulic motor 8 through a high-pressure pipeline. The mechanical energy converted by the low-power variable hydraulic motor 8 is transmitted to the rear axle 10 through the input shaft of the rear axle 10. The high-power variable hydraulic pump 21 absorbs and converts mechanical energy output by the output shaft of the rear axle 10 into hydraulic energy, and the hydraulic energy is input into the high-power variable hydraulic motor 15 through a high-pressure pipeline. The mechanical energy converted by the high-power variable hydraulic motor 15 is input into the rear axle 10 through the small chain wheel 17 and the large chain wheel 14.
It can be seen that the key points of the present application are: the mechanical energy of the high output variable hydraulic motor 15 and the mechanical energy of the low output variable hydraulic motor 8 are merged by the rear axle 10 and then input to the high output variable hydraulic pump 21. At this time, the mechanical energy output from the low power variable hydraulic motor 8 is a loss of mechanical energy and hydraulic energy that supplements the rear axle 10, the sprocket set, the high power variable hydraulic pump 21, and the high power variable hydraulic motor 15.
Further, as shown in fig. 1, the rotational speeds of the low power variable displacement hydraulic pump 3, the low power variable displacement hydraulic motor 8, the high power variable displacement hydraulic pump 21, and the high power variable displacement hydraulic motor 15 are increased simultaneously with the increase in the rotational speed of the prime mover 1. When the displacement of the low power variable displacement hydraulic pump 3 is increased, the rotational speeds of the low power variable displacement hydraulic motor 8, the high power variable displacement hydraulic pump 21, the high power variable displacement hydraulic motor 15, and the rear axle 10 are also increased. The displacement of the low power variable displacement hydraulic motor 8 is reduced and the rotational speeds of the high power variable displacement hydraulic pump 21 and the high power variable displacement hydraulic motor 15 and the rear axle 10 are also increased. Increasing the displacement of the high power variable hydraulic pump 21 and increasing the pressure of the high pressure oil passage of the high power variable hydraulic motor 15 can increase the power of the high power variable hydraulic pump 21, the high power variable hydraulic motor 15 and the rear axle 10.
Further, as shown in fig. 1, the electronic control unit 29 multiplies 100% of the ratio of the power value calculated by the third torque speed sensor 16 to the power value obtained by the fourth torque speed sensor 22 by the total efficiency of the series connection of the high power variable hydraulic motor 15 and the high power variable hydraulic pump 21. The power difference obtained by subtracting the third torque speed sensor 16 and the fourth torque speed sensor 22 from the power value calculated by the second torque speed sensor 9 by the electronic control unit 29 is the power consumption of the rear axle 10 and the chain wheel set.
The technical principle of the test bed for the hydraulic motor, the hydraulic pump and the rear axle is the energy complementation principle of the hydraulic pump and the hydraulic motor. The working principle is as follows: the hydraulic energy output by the high power variable hydraulic pump 21 is transmitted to the high power variable hydraulic motor 15, and the mechanical energy converted by the high power variable hydraulic motor 15 is transmitted to the high power variable hydraulic pump 21 through a chain wheel set of the rear axle 10. The transmission loss of the high power variable hydraulic pump 21 and the high power variable hydraulic motor 15 is supplemented by the low power variable hydraulic motor 8, and the hydraulic energy of the low power variable hydraulic motor 8 is supplied from the prime mover 1 and the low power variable hydraulic pump 3. It can be seen that the test bench of the present application is a working method which can be achieved by taking five steps at a time, and the test bench can simultaneously test two high-power hydraulic motors and hydraulic pumps, namely, the high-power variable hydraulic motor 15 and the high-power variable hydraulic pump 21 in the present embodiment, and two low-power hydraulic motors and hydraulic pumps, namely, the low-power variable hydraulic motor 8 and the low-power variable hydraulic pump 3 in the present embodiment, and also has one rear axle 10, and the energy consumption is low.
Furthermore, each electromagnetic unloading valve is a pilot type electromagnetic unloading valve. Namely, the first electromagnetic unloading valve 7 and the second electromagnetic unloading valve 20 are pilot electromagnetic unloading valves.
Further, each overflow valve is a pilot-type overflow valve. Namely, the first relief valve 28 and the second relief valve 23 are both pilot-type relief valves.
Further, each hydraulic servo valve is an electro-hydraulic servo valve or a moving coil type servo valve. Namely, the first hydraulic servo valve 4, the second hydraulic servo valve 5, the third hydraulic servo valve 24 and the fourth hydraulic servo valve 18 are all electro-hydraulic servo valves or moving-coil servo valves.
Further, the rear axle 10 is a motor vehicle rear axle.
Referring to fig. 1, tested by the practice of the present test stand: the test work can be completed by using a 160 kilowatt diesel engine through two 400 kilowatt hydraulic motors and hydraulic pumps, two 160 kilowatt hydraulic motors and hydraulic pumps and a 200 kilowatt rear axle.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A test bench for hydraulic motors, hydraulic pumps and rear axles, comprising: the hydraulic control system comprises a prime motor (1), a low-power variable hydraulic pump (3), a low-power variable hydraulic motor (8), a rear axle (10), a high-power variable hydraulic pump (21), a high-power variable hydraulic motor (15), an electric control unit (29), large and small chain wheels (14 and 17), first to fourth hydraulic servo valves (4, 5, 24 and 18), first to second electromagnetic unloading valves (7 and 20), first to second overflow valves (28 and 23), first to second pressurized oil tanks (13 and 27), first to second pressure sensors (6 and 19) and first to fourth torque and rotating speed sensors (2, 9, 16 and 22); wherein the content of the first and second substances,
a main shaft of the low-power variable hydraulic pump (3) is connected with an output shaft of a prime motor (1) through a first torque rotating speed sensor (2), a high-pressure oil pipe connected with the low-power variable hydraulic pump (3) is connected with a first pressure sensor (6), a first overflow valve (28), a first electromagnetic unloading valve (7), a first hydraulic servo valve (4), a second hydraulic servo valve (5) and a low-power variable hydraulic motor (8) in parallel, an oil outlet pipe of the low-power variable hydraulic motor (8) is connected with a first pressurizing oil tank (13), the first pressurizing oil tank (13) is connected with an oil inlet pipe of the low-power variable hydraulic pump (3), and a main shaft of the low-power variable hydraulic motor (8) is connected with an input shaft of a rear axle (10) through a second torque rotating speed sensor (9);
an output shaft at one end of the rear axle (10) is connected with a high-power variable hydraulic pump (21) through a fourth torque rotating speed sensor (22), an output shaft at the other end of the rear axle (10) is connected with a large chain wheel (14), the large chain wheel (14) is connected with a small chain wheel (17) through a chain, a spline shaft connected with the small chain wheel (17) is connected with a main shaft of the high-power variable hydraulic motor (15) through a third torque rotating speed sensor (16), a high-pressure oil pipe connected with the high-power variable hydraulic pump (21) is connected with a third hydraulic servo valve (24), a second overflow valve (23) and a second electromagnetic unloading valve (20) in parallel, the hydraulic control system comprises a fourth hydraulic servo valve (18), a second pressure sensor (19) and a high-power variable hydraulic motor (15), wherein an oil outlet pipe of the high-power variable hydraulic motor (15) is connected with a second pressurizing oil tank (27), and the second pressurizing oil tank (27) is connected with an oil inlet pipe of the high-power variable hydraulic pump (21);
control pipelines of a first hydraulic servo valve (4), a second hydraulic servo valve (5), a third hydraulic servo valve (24) and a fourth hydraulic servo valve (18) are respectively connected with servo pipelines of a corresponding low-power variable hydraulic pump (3), a corresponding low-power variable hydraulic motor (8), a corresponding high-power variable hydraulic pump (21) and a corresponding high-power variable hydraulic motor (15), low-pressure pipelines of the first hydraulic servo valve (4) and the second hydraulic servo valve (5) are respectively connected with a first pressurizing oil tank (13), and low-pressure pipelines of the third hydraulic servo valve (24) and the fourth hydraulic servo valve (18) are respectively connected with a second pressurizing oil tank (27);
the electronic control unit (29) is provided with an input signal circuit and an output signal circuit, the input signal circuit is connected with a first pressure sensor (6), a second pressure sensor (19), a first torque rotating speed sensor (2), a second torque rotating speed sensor (9), a third torque rotating speed sensor (16) and a fourth torque rotating speed sensor (22), and the output signal circuit is connected with a first hydraulic servo valve (4), a second hydraulic servo valve (5), a third hydraulic servo valve (24), a fourth hydraulic servo valve (18), a first electromagnetic unloading valve (7) and a second electromagnetic unloading valve (20).
2. Test bench according to claim 1, characterized in that a filter (11) and a cooler (12) are connected in series between the oil outlet of the low power variable hydraulic motor (8) and the pressurized oil tank (13).
3. Test bench according to claim 1, characterized in that a second filter (25) and a second cooler (26) are connected in series between the outlet of the high power variable hydraulic motor (15) and the second pressurized oil tank (27).
4. The test bed according to claim 1, wherein each electromagnetic unloading valve is a pilot type electromagnetic unloading valve.
5. The test bench of claim 1, wherein each relief valve is a pilot-type relief valve.
6. The test rig of claim 1, wherein each hydraulic servo valve is an electro-hydraulic servo valve or a moving coil servo valve.
7. Test bench according to any of claims 1-6, characterized in that the rear axle is a motor vehicle rear axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032401.5U CN216518976U (en) | 2020-12-16 | 2020-12-16 | Test bed for hydraulic motor, hydraulic pump and rear axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023032401.5U CN216518976U (en) | 2020-12-16 | 2020-12-16 | Test bed for hydraulic motor, hydraulic pump and rear axle |
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| Publication Number | Publication Date |
|---|---|
| CN216518976U true CN216518976U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023032401.5U Active CN216518976U (en) | 2020-12-16 | 2020-12-16 | Test bed for hydraulic motor, hydraulic pump and rear axle |
Country Status (1)
| Country | Link |
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| CN (1) | CN216518976U (en) |
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