A general efficiency performance testing device for EHB hydraulic piston pump

Abstract

The utility model provides a kind of efficiency performance test equipment of general EHB hydraulic ram pump, comprising: ram pump, the input end of the ram pump is connected with the output end of filter by normal pressure pipeline, the output end of the ram pump is connected with the input end of pressure sensor by high pressure oil circuit, the side of the ram pump is connected with shaft coupling by normal pressure pipeline, the side of the shaft coupling with the ram pump is connected with servo motor by normal pressure pipeline;This efficiency performance test equipment of hydraulic ram pump, low investment cost, manufacture is relatively simple, and general performance is strong.

Description

Technical Field

[0001] This utility model relates to hydraulic braking systems, and more particularly to a general-purpose efficiency performance testing device for EHB hydraulic piston pumps. Background Technology

[0002] As a core component of the EHB electro-hydraulic braking system, the hydraulic plunger pump converts electrical energy into high-pressure potential energy of the brake fluid, which is stored in an accumulator. When the driver depresses the brake pedal, the high-pressure brake fluid in the accumulator is released to assist braking and ensure safe vehicle operation. Since the brake fluid in the accumulator comes from the plunger pump, and different braking habits and road conditions result in varying brake fluid requirements, the hydraulic plunger pump needs to undergo comprehensive efficiency and pressure build-up tests to meet the brake fluid volume requirements during vehicle braking. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a universal efficiency performance testing device for EHB hydraulic piston pumps, capable of performing performance tests on hydraulic piston pumps.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a universal efficiency performance testing device for an EHB hydraulic plunger pump, comprising: a plunger pump, wherein the input end of the plunger pump is connected to the output end of a filter via an atmospheric pressure pipeline, the output end of the plunger pump is connected to the input end of a pressure sensor via a high pressure oil circuit, one side of the plunger pump is connected to a coupling via an atmospheric pressure pipeline, and the side of the coupling away from the plunger pump is connected to a servo motor via an atmospheric pressure pipeline.

[0006] Furthermore, the input end of the filter is connected to the oil reservoir via an atmospheric pressure pipeline.

[0007] Furthermore, an accumulator is installed between the plunger pump and the pressure sensor.

[0008] Furthermore, the output end of the pressure sensor is connected to the input end of the pressure-adjustable relief valve via a high-pressure pipeline.

[0009] Furthermore, the output end of the pressure-adjustable relief valve is connected to the input end of the flow sensor via a high-pressure pipeline.

[0010] Furthermore, the first output terminal of the flow sensor is connected to the input terminal of the first normally closed valve via a high-pressure pipeline.

[0011] Furthermore, the second output terminal of the flow sensor is connected to the input terminal of the second normally closed valve via a high-pressure pipeline.

[0012] Furthermore, the output end of the first normally closed valve is connected to the measuring cup via a return oil line.

[0013] Furthermore, the output end of the second normally closed valve is connected to the oil reservoir via a return oil pipeline.

[0014] The beneficial effects of this utility model are: this hydraulic plunger pump efficiency performance testing equipment has low investment cost, is relatively simple to manufacture, and has strong versatility.

[0015] By changing the structure of the coupling to connect the servo motor and the hydraulic piston pump, different piston pumps are tested; by setting factors such as the motor speed, torque, working time, working voltage, upper limit of working current, and pressure of the relief valve, multiple working modes are formed to test the efficiency and performance of the piston pump.

[0016] The testing equipment has multiple backups. By using digital pressure gauges, pressure sensors, flow sensors, and measuring cups, the test data can be compared to reduce the measurement error of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection process for a general-purpose EHB hydraulic piston pump efficiency performance testing device. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] Please see Figure 1 A general-purpose efficiency performance testing device for EHB hydraulic plunger pumps includes: a plunger pump 1, the input end of which is connected to the output end of a filter 2 via an atmospheric pressure pipeline, the output end of which is connected to the input end of a pressure sensor 3 via a high-pressure oil circuit, one side of the plunger pump 1 being connected to a coupling 4 via an atmospheric pressure pipeline, and the side of the coupling 4 away from the plunger pump 1 being connected to a servo motor 5 via an atmospheric pressure pipeline.

[0020] The input end of the filter 2 is connected to the oil reservoir 11 via an atmospheric pressure pipeline.

[0021] An accumulator 6 is installed between the plunger pump 1 and the pressure sensor 3.

[0022] The output of the pressure sensor 3 is connected to the input of the pressure adjustable relief valve 7 via a high-pressure pipeline.

[0023] The output end of the pressure-adjustable relief valve 7 is connected to the input end of the flow sensor 8 via a high-pressure pipeline.

[0024] The first output terminal of the flow sensor 8 is connected to the input terminal of the first normally closed valve 901 via a high-pressure pipeline.

[0025] The second output terminal of the flow sensor 8 is connected to the input terminal of the second normally closed valve 902 via a high-pressure pipeline.

[0026] The output end of the first normally closed valve 901 is connected to the measuring cup 10 through the return oil pipeline.

[0027] The output end of the second normally closed valve 902 is connected to the oil reservoir 11 through the return oil pipeline.

[0028] A general-purpose efficiency performance testing device for an EHB hydraulic piston pump includes: a piston pump 1, the input end of which is connected to the output end of a filter 2 via a pipe, the output end of which is connected to the input end of a pressure sensor 3 via a pipe, and one side of the piston pump 1 is connected to a servo motor 5 via a coupling 4.

[0029] In one specific embodiment, the pressure sensor 3 can be replaced by a digital pressure gauge.

[0030] The input end of the filter 2 is connected to the oil reservoir 11 via a pipe.

[0031] An accumulator 6 is installed between the plunger pump 1 and the pressure sensor 3.

[0032] The output end of the pressure sensor 3 is connected to the input end of the pressure adjustable relief valve 7 via a pipe.

[0033] The output end of the pressure-adjustable relief valve 7 is connected to the input end of the flow sensor 8 via a pipe.

[0034] The first output terminal of the flow sensor 8 is connected to the input terminal of the first normally closed valve 901 via a pipe.

[0035] The second output terminal of the flow sensor 8 is connected to the input terminal of the second normally closed valve 902 via a pipe.

[0036] The output end of the first normally closed valve 901 is connected to the measuring cup 10 through a pipe.

[0037] The output end of the second normally closed valve 902 is connected to the oil reservoir 11 through a pipeline.

[0038] To facilitate understanding of the technical solution of this utility model, the working principle of this utility model in actual process will be described in detail below:

[0039] By supplying power to the servo motor 5, electrical energy is converted into rotational mechanical energy. This mechanical energy is then transmitted to the plunger pump 1 via the coupling 4. The plunger pump 1 rotates through its internal eccentric shaft, converting the mechanical energy into high-pressure potential energy of the brake fluid in the accumulator 6 for storage. The pressure sensor 3 monitors the actual fluid pressure in the accumulator 6. The pressure of the adjustable overflow valve 7 can be adjusted, and the flow sensor 8 measures the brake fluid outflow. Correspondingly, by controlling the first normally closed valve 901 and the second normally closed valve 902, the brake fluid can be returned to the reservoir 11 for reuse, or flow into the measuring cup 10 to verify the accuracy of the flow sensor.

[0040] In addition, since the second normally closed valve 902 is mainly used to calibrate the accuracy of the flow sensor 8 by measuring cup 10, the second normally closed valve 902 can be closed by default when flow calibration is not required.

[0041] Multiple test modes of a general-purpose EHB hydraulic piston pump efficiency performance testing device:

[0042] Px is the minimum pressure set for the accumulator on the vehicle (when the pressure of the accumulator on the vehicle is lower than Px, the motor works to build up pressure for the plunger pump); P0 is the test pressure that the accumulator needs to reach; P1 is the relief valve pressure; Pm is the maximum safe pressure that the relief valve can be set when the test equipment is working.

[0043] 2.1. With the motor at a constant speed, open the first normally closed valve 901 and close the second normally closed valve 902;

[0044] 1) Set the relief valve pressure P1 > P0: Test the pressure build-up efficiency of the hydraulic piston pump from 0 to P0;

[0045] 2) Set the relief valve pressure P1=P0=0: Test the oil output efficiency of the hydraulic piston pump under different speeds without load;

[0046] 2.2 When the motor reaches constant torque, open the first normally closed valve 901 and close the second normally closed valve 902;

[0047] 1) Set the relief valve pressure P1=Pm: test the maximum hydraulic pressure that the plunger pump can reach;

[0048] 2) Set the relief valve pressure P1=P0=0: Test the oil output efficiency of the hydraulic piston pump under different torques without load;

[0049] 2.3 The motor sets a timer, opens the first normally closed valve 901, and closes the second normally closed valve 902;

[0050] 1) Set the relief valve pressure P1 > P0: Test the pressure build-up efficiency of the hydraulic piston pump from 0 to P0;

[0051] 2) Set the relief valve pressure P1=0: Test the oil output efficiency of the hydraulic piston pump at different times without load;

[0052] 2.4 Set the motor voltage to constant, open the first normally closed valve 1, and close the second normally closed valve 2;

[0053] 1) Set the relief valve pressure P1 > P0: Test the pressure build-up efficiency of the hydraulic piston pump from 0 to P0 under different voltages;

[0054] 2) Set the relief valve pressure P1=0: Test the unloaded oil output efficiency of the hydraulic piston pump under different voltages;

[0055] 2.5 To set the upper limit of the motor's constant current, open the first normally closed valve 1 and close the second normally closed valve 2;

[0056] 1) Set the relief valve pressure P1=Pm: Test the pressure build-up efficiency of the hydraulic piston pump with different current upper limits from 0 to P0;

[0057] 2) Set the relief valve pressure P1=0: Test the unloaded oil output efficiency of the hydraulic piston pump under different current upper limits;

[0058] 2.6 Set the relief valve to a constant pressure, open normally closed valve 1, and close normally closed valve 2; this test data can be used for subsequent plunger pump efficiency improvement plans.

[0059] 1) Set motor speed: Test the oil output efficiency of the hydraulic piston pump at different motor speeds;

[0060] 2.7 The relief valve sets the pressure Px for the first time, and the relief valve sets the pressure P0 for the second time. Then, normally closed valve 1 is opened and normally closed valve 2 is closed.

[0061] Simulating real vehicle conditions: Testing the pressure build-up efficiency of the plunger pump from Px to P0;

[0062] The experimental results are as follows:

[0063] ①: The motor speed is set to 2000 r / min, P1=P0=170 bar, and the plunger pump builds up pressure from 0 to 170 bar in 14.5 seconds;

[0064] ②: When the overflow valve pressure P1 = 200 bar, the motor speed is set to 2000 r / min, and the plunger pump displacement is 10.65 ml / s; when the motor speed is set to 1800 r / min, the plunger pump displacement is 9.88 ml / s.

[0065] ③: Px=150bar, P0=200bar, motor constant speed 2000r / min, the time for the plunger pump to build up pressure from 150bar to 200bar is 2.95s.

[0066] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be defined by the appended claims.

Claims

1. A universal efficiency performance testing device for EHB hydraulic piston pumps, characterized in that, include: A plunger pump (1) is connected to the output of a filter (2) via an atmospheric pressure pipeline. The output of the plunger pump (1) is connected to the input of a pressure sensor (3) via a high-pressure oil circuit. One side of the plunger pump (1) is connected to a coupling (4) via an atmospheric pressure pipeline. The side of the coupling (4) that is away from the plunger pump (1) is connected to a servo motor (5) via an atmospheric pressure pipeline.

2. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 1, characterized in that: The input end of the filter (2) is connected to the oil reservoir (11) through an atmospheric pressure pipeline.

3. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 2, characterized in that: An accumulator (6) is installed between the plunger pump (1) and the pressure sensor (3).

4. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 3, characterized in that: The output end of the pressure sensor (3) is connected to the input end of the pressure adjustable relief valve (7) through a high-pressure pipeline.

5. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 4, characterized in that: The output end of the pressure adjustable relief valve (7) is connected to the input end of the flow sensor (8) through a high-pressure pipeline.

6. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 5, characterized in that: The first output terminal of the flow sensor (8) is connected to the input terminal of the first normally closed valve (901) via a high-pressure pipeline.

7. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 6, characterized in that: The second output terminal of the flow sensor (8) is connected to the input terminal of the second normally closed valve (902) via a high-pressure pipeline.

8. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 6, characterized in that: The output end of the first normally closed valve (901) is connected to the measuring cup (10) through the return oil pipeline.

9. The universal EHB hydraulic piston pump efficiency performance testing equipment according to claim 7, characterized in that: The output end of the second normally closed valve (902) is connected to the oil reservoir (11) through the return oil pipeline.

Images