Hydraulic pump test bench

1、 Overview

The hydraulic pump durability test bench is mainly used as a specialized equipment for durability testing of low and medium power hydraulic pumps. Parameters such as speed, pressure, and testing time can be set, and the equipment can operate automatically or manually according to the set steps based on the set parameters. It can measure parameters such as pump speed, pressure, flow rate, oil temperature, etc., and automatically draw test curves according to requirements. The test bench can be flexibly customized and configured according to actual needs to complete relevant tests.

2、 Execution standards

1.3 Execution Standards

GB/T 3766-2001 "General Technical Conditions for Hydraulic Systems"

GB/Z 20-123-2006 Hydraulic System Assembly Clearance Inspection

JB/T6996-2007 CB2894-2008 "General Technical Conditions for Hydraulic Systems of Heavy Machinery"

GB2894-2008 "Safety Standards and Guidelines for Use"

GB/T 24001-2004 "Huaning Management System"

GB/T 28001-2011 Occupational Health and Safety Order Management System

GB/T 5226.1-19% "Electrical Equipment for Industrial Machinery Part 1: General Technical Conditions"

JB/T 10829-2008 "Hydraulic Motors"

JB/T 7041-2006<Hydraulic Gear Pump '

JB/T 7041-2006 "Liquid Directional Piston Pump"

3、 Experimental project

a) Run in test; b) Displacement verification test; c) Total efficiency test, volumetric efficiency test; d) Start efficiency test;

e) External leakage detection test; f) Low speed performance test; g) Overspeed performance test; h) Full load test; i) Overload test; j) Impact test; k) Continuous commutation test;

4、 Technical parameters and specifications of the test bench

1. Test bench usage environment

a. Environmental temperature: -5-+50 ° C;

b. Environmental humidity: 20% -95% RH;

c. Power supply: three-phase AC380V ± 10%, frequency 50HZ ± 1HZ, three-phase five wire system, total equipment power approximately 350KW

d. Gas source pressure: not less than 0.4MPa, flow rate ≤ 10m3/h;

e. Cooling water demand: flow rate of 5 m3/h; The inlet water temperature is less than 20 ° C;

1. The driving loading device adopts a variable frequency motor for loading

a. Rated power of motor: 200KW

b. Rated torque: 1273N. M

c. Rated speed 1500RPM

d. Speed control range: 500-3000rpm, capable of forward and reverse rotation

2. Hydraulic loading system

a. Fuel tank capacity 2000L, stainless steel fuel tank;

b. Rated pressure of 40MPa, with a maximum working pressure of 45MPa;

c. Safety valve set pressure: 500Bar

d. Larger test pump flow rate: 210L/Min

d) Hydraulic system cooling method: water cooling

3. Measurement range of import and export pressure sensors

Pressure sensor brand: WIKA Pressure range: 0-600bar Measurement accuracy: ± 0.25% FS

4. Measurement range of torque sensor:

20-2000N. M accuracy 0.2% FS

5. Measurement range of flow sensor

5.1 Pump outlet flow sensor brand: Denico measurement range 3-300L/min measurement accuracy: ± 0.5%

5.1 Pump Leakage Flow Sensor Brand: Denico Measurement Range 0.7-70L/min Measurement Accuracy: ± 0.5%

6. Parameters of the oil replenishment pump

Oil replenishment flow rate 50-200L/Min, with a relatively high pressure of 2MPa

7: Temperature sensor

Temperature sensor brand: WIKA measurement range -20-150 ° C, measurement accuracy: ± 0.25% FS

5、 Scheme Introduction

5. Introduction to the test bench and overall layout

5.1. The test bench mainly consists of the following parts

1. Test bench warehouse

2. Hydraulic loading system

3. Main electrical control cabinet

4. Operation control cabinet

5. Water cooling system+

6. Oil replenishment pump parameters

Oil replenishment flow rate 50-200L/Min, with a relatively high pressure of 2MPa

7. Temperature sensor

5.1.2 The test bench compartment is made of hollow steel welded together, which has high structural strength and can withstand the working of the specimen

The vibration impact has sufficient strength and stiffness to ensure the temperature in the testing project. The platform is surrounded by a development style, which facilitates testing, lifting operations, and maintenance.

5.1.3 Hydraulic testing loading system designed as an independent device

5.2 Driver loading system

5.2.1 The drive loading system adopts a horizontal layout and is arranged as a whole on the loading platform

5.2.2. The drive loading system mainly consists of a variable frequency motor, torque sensor, coupling device, test piece fixture, etc

5.2.3. Drive the loading motor to the coupling, torque sensor, and test workpiece connection

5.2.4. The connection interfaces on both sides of the workbench for the test piece testing pipeline are connected through quick connectors, making it convenient to quickly update the pipeline;

5.2.5. Adopt domestically produced high-quality torque sensors

5.3 Hydraulic testing circuit

5.3.1 The hydraulic system is an independent platform, and the oil tank and control valve group are arranged on the hydraulic testing circuit platform

5.3.2 All oil ports of the hydraulic system are connected to the test bench through a portion of hardware and hoses, and the names of each oil port are clearly marked;

5.3.3 The hydraulic system mainly consists of an oil tank, an oil temperature control system, a hydraulic testing circuit, etc

5.3.4 Hydraulic system oil tank 2000L, arranged on the test circuit bracket;

5.3.5 The fuel tank is welded with 304 stainless steel, and a large cleaning hatch is set on the front of the tank for easy cleaning in the later stage.

5.3.6 The fuel tank is equipped with a liquid level indicator to facilitate real-time observation of the oil level;

5.3.7 The fuel tank is equipped with a liquid level switch, which has multi-level liquid level alarms, such as high liquid level, low liquid level, and emergency stop function for low liquid level.

5.3.8 The fuel tank is equipped with an air filter with a desiccant, which can effectively prevent water vapor from entering the tank. When the desiccant changes color, the system will sound an alarm to prompt replacement;

5.3.9 Reserve a set of motor pump unit inlet on the fuel tank for the convenience of adding other functional tests in the later stage;

5.3.10 The system is equipped with a water cooler, which is automatically controlled by the system to ensure that the oil temperature and temperature of the hydraulic system meet the testing requirements during long-term continuous operation.

5.3.11 The testing system adopts proportional pressure and flow control, which can achieve arbitrary adjustment of motor speed and pressure;

5.3.12 Install a flow meter on the return oil circuit of the hydraulic system, which can detect the output flow of the hydraulic motor in real time;