Oil pump test bench

Abstract

The utility model provides an oil pump test bench which comprises a driving motor (22) and a test pump (23) which are fixed on the top of a test bench surface (1), and an output shaft of the driving motor is connected with a driving shaft of the test pump (23). A constant-temperature oil tank (31) and a motor pump (32) are arranged at the bottom of the test table board (1), the output end of the motor pump (32) is connected with a heat exchange assembly to adjust the temperature of the constant-temperature oil tank (31), the oil outlet end of the constant-temperature oil tank (31) is connected with the inlet end of a test pump (23), and the outlet end of the test pump (23) is connected with the oil inlet end of the constant-temperature oil tank (31) through a test assembly; the multifunctional requirement can be met, constant temperature control of different temperature sections can be achieved, different working conditions at different temperatures can be simulated by changing an upper computer control program, the performance and durability test requirements of the research and development stage can be completely met, and meanwhile the consistency test requirement of mass production is met.

Description

Technical Field

[0001] The utility model relates to the technical field of test benches, in particular to an oil pump test bench. Background Art

[0002] The cycloid pump is a gear pump that uses the change in the volume of the seal between teeth to achieve oil suction and oil pressure. It is widely used in low-pressure situations. The hydraulic oil used is gear oil, which has the characteristics of high viscosity and great influence of temperature on viscosity. The change in viscosity has a great influence on the volumetric efficiency of the cycloid pump. There are many factors that affect temperature, such as environment, oil tank capacity, test conditions of the oil pump, and frequency of use of the test bench.

[0003] Existing oil pump test benches generally rarely consider the impact of temperature on pump pressure and flow. Even if the temperature problem is considered, it is simply heated or dissipated through a heater or heat exchanger. However, it is ignored that when the heater is heating, the heater will only heat the local oil near the heating pipe, resulting in the local temperature being too high while the surrounding temperature does not meet the requirements. At this time, the temperature detected by the temperature probe is often inaccurate, which ultimately leads to two consequences:

[0004] 1) If the temperature probe is very close to the heater, the temperature detected by the temperature probe meets the threshold requirement, thereby controlling the heater to stop heating. However, the actual situation is that the overall oil temperature of the tank does not meet the requirement, which affects the test data and product consistency test;

[0005] 2) If the temperature probe is far away from the heater, the temperature detected by the probe may not meet the requirements. In addition, since the oil near the heater has low fluidity, the oil is continuously heated locally, which accelerates the aging of the oil and produces sludge, affecting the cleanliness of the tested product.

[0006] Therefore, there is an urgent need to provide an oil pump test bench to solve the defects and shortcomings in the above-mentioned prior art. Utility Model Content

[0007] In order to solve the defects and shortcomings in the prior art, the utility model provides an oil pump test bench.

[0008] The technical solution provided by the utility model is as follows:

[0009] An oil pump test bench, the test bench comprising a drive motor and a test pump fixed to the top of the test bench, the output shaft of the drive motor being connected to the drive shaft of the test pump; a constant temperature oil tank and a motor pump are arranged at the bottom of the test bench, the output end of the motor pump is connected to a heat exchange component to achieve temperature regulation of the constant temperature oil tank, the oil outlet end of the constant temperature oil tank is connected to the inlet end of the test pump, and the outlet end of the test pump is connected to the oil inlet end of the constant temperature oil tank via the test component.

[0010] As a further preferred embodiment of the present invention, the test assembly at least includes a flow sensor and a pressure sensor.

[0011] As a further preferred embodiment of the present utility model, a torque sensor is connected between the driving motor and the test pump, and a throttle valve or a relief valve is also connected to the outlet end of the test pump.

[0012] As a further preferred embodiment of the utility model, a connecting plate is fixed on the top of the test table, the drive motor and the test pump are fixed on the top of the connecting plate, and an oil groove is also provided on the outer edge of the test table.

[0013] As a further preferred embodiment of the present invention, the heat exchange component includes a heat exchanger and a heater.

[0014] As a further preferred embodiment of the utility model, a temperature controller and a temperature probe are provided on the constant temperature oil tank.

[0015] As a further preferred embodiment of the present invention,

[0016] The temperature probe detects the internal temperature of the thermostatic oil tank in real time and feeds it back to the temperature controller.

[0017] When the detected temperature is higher than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump and the heat exchanger to start, dissipating heat and cooling the oil;

[0018] When the detected temperature is lower than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump and the heater to turn on to heat the oil.

[0019] As a further preferred embodiment of the present invention,

[0020] When cooling the oil, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heat exchanger - constant temperature oil tank inlet;

[0021] When the oil is heated, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heater - constant temperature oil tank inlet.

[0022] As a further preferred embodiment of the present utility model, an oil suction filter is further provided between the constant temperature oil tank and the test pump.

[0023] As a further preferred embodiment of the utility model, a plurality of drive motors and test pumps are connected to the top of the constant temperature oil tank.

[0024] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0025] 1) The utility model provides an oil pump test bench which can meet multi-functional requirements and realize constant temperature control in different temperature ranges. By changing the upper computer control program, different working conditions under different temperatures can be simulated. It can be fully used for performance and durability testing requirements in the research and development stage, and also meet the consistency testing requirements of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a structural schematic diagram of an oil pump test bench.

[0027] Figure 2 The utility model is a test principle diagram of an oil pump test bench. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] [First embodiment]

[0032] like Figure 1-2The figure shows an oil pump test bench provided by the first embodiment of the utility model. The test bench includes a drive motor 22 and a test pump 23 fixed to the top of the test bench 1, ensuring the concentricity of the motor shaft and the drive shaft of the test pump so that the output shaft of the drive motor is connected to the drive shaft of the test pump 23.

[0033] like Figure 1-2 As shown, the test assembly at least includes a flow sensor 26 and a pressure sensor 27, a torque sensor 25 is connected between the drive motor 22 and the test pump 23, and a throttle valve or a relief valve 28 is also connected to the outlet of the test pump 23. The drive motor 22 is controlled by the host computer to control the speed, etc., and the drive motor 22 drives the test pump 23 to rotate. The main parameters such as the driving torque, pressure and flow of the test pump 23 can be detected by the torque sensor 25, the pressure sensor 27, the flow sensor 26, etc. The load condition of the pump can be simulated by adjusting the throttle valve (the throttle valve can also be replaced by a relief valve to achieve a constant load condition). The torque sensor, pressure sensor, and flow sensor will be different at different temperatures. Therefore, whether it is for the factory test of mass production or the experiment in the research and development stage, the temperature of the oil needs to be accurately controlled to ensure the accuracy of the data.

[0034] A connecting plate 21 is fixed on the top of the test table 1, and a driving motor 22 and a test pump 23 are fixed on the top of the connecting plate 21 to ensure the stability of the test process. An oil groove 24 is also provided on the outer edge of the test table 1. During the test, the leaked oil generated by the test pump 23 can flow back to the interior of the constant temperature oil tank 31 through the oil groove 24 on the test table 1.

[0035] like Figure 1 As shown, a thermostatic oil tank 31 and a motor pump 32 are provided at the bottom of the test table 1. The output end of the motor pump 32 is connected to a heat exchange component to achieve temperature regulation of the thermostatic oil tank 31. The oil outlet of the thermostatic oil tank 31 is connected to the inlet end of the test pump 23. The outlet end of the test pump 23 is connected to the oil inlet end of the thermostatic oil tank 31 through the test component. An oil suction filter is also provided between the thermostatic oil tank 31 and the test pump 23 to further improve the cleanliness of the oil entering the test pump 23 from the thermostatic oil tank 31.

[0036] In this embodiment, the heat exchange assembly includes a heat exchanger 33 and a heater 34. The heat exchanger 33 realizes cooling and heat dissipation of the oil, and the heater 34 realizes heating of the oil. The thermostatic oil tank 31 is provided with a temperature controller and a temperature probe 35 to detect the internal temperature of the thermostatic oil tank 31 in real time through the temperature probe and feed back to the temperature controller. The temperature controller controls the on and off of the motor pump, the heat exchanger, and the heater respectively. By setting the set threshold temperature of the temperature controller, the regulation and control of different temperatures can be realized.

[0037] When the detected temperature is higher than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump 32 and the heat exchanger to start, dissipating heat and cooling the oil; at this time, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heat exchanger - constant temperature oil tank inlet;

[0038] When the detected temperature is lower than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump 32 and the heater to turn on to heat the oil; at this time, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heater - constant temperature oil tank inlet.

[0039] like Figure 1 As shown, in this embodiment, the top of the constant temperature oil tank 31 is connected with multiple sets of drive motors 22 and test pumps 23 ( Figure 1 By sharing a constant temperature oil tank, the three pumps can be tested simultaneously, and the test of each pump can be controlled independently, that is, the three pumps can be tested at different speeds and other working conditions at the same temperature, further improving the test efficiency.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An oil pump test bench, characterized in that: The test bench comprises a drive motor (22) and a test pump (23) fixed to the top of a test bench (1), wherein the output shaft of the drive motor is connected to the drive shaft of the test pump (23); a constant temperature oil tank (31) and a motor pump (32) are arranged at the bottom of the test bench (1), wherein the output end of the motor pump (32) is connected to a heat exchange component to achieve temperature regulation of the constant temperature oil tank (31), the oil outlet end of the constant temperature oil tank (31) is connected to the inlet end of the test pump (23), and the outlet end of the test pump (23) is connected to the oil inlet end of the constant temperature oil tank (31) via the test component.

2. The oil pump test bench according to claim 1, characterized in that: The test assembly comprises at least a flow sensor (26) and a pressure sensor (27).

3. The oil pump test bench according to claim 1, characterized in that: A torque sensor (25) is connected between the drive motor (22) and the test pump (23), and a throttle valve or a relief valve (28) is also connected to the outlet end of the test pump (23).

4. The oil pump test bench according to claim 1, characterized in that: A connecting plate (21) is fixed on the top of the test table (1), the driving motor (22) and the test pump (23) are fixed on the top of the connecting plate (21), and an oil groove (24) is also provided on the outer edge of the test table (1).

5. The oil pump test bench according to claim 1, characterized in that: The heat exchange component comprises a heat exchanger (33) and a heater (34).

6. The oil pump test bench according to claim 5, characterized in that: The constant temperature oil tank (31) is provided with a temperature controller and a temperature probe (35).

7. The oil pump test bench according to claim 6, characterized in that: The temperature probe detects the internal temperature of the constant temperature oil tank (31) in real time and feeds back the temperature to the temperature controller. When the detected temperature is higher than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump (32) and the heat exchanger to start, so as to dissipate heat and cool the oil; When the detected temperature is lower than the threshold temperature set by the temperature controller, the temperature controller controls the motor pump (32) and the heater to start, thereby heating the oil.

8. The oil pump test bench according to claim 7, characterized in that: When cooling the oil, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heat exchanger - constant temperature oil tank inlet; When the oil is heated, the oil circulation loop is: constant temperature oil tank outlet - motor pump - heater - constant temperature oil tank inlet.

9. The oil pump test bench according to claim 1, characterized in that: An oil suction filter is also provided between the constant temperature oil tank (31) and the test pump (23).

10. The oil pump test bench according to claim 1, characterized in that: The top of the constant temperature oil tank (31) is connected to a plurality of sets of drive motors (22) and test pumps (23).

Images