1、 Product Overview

The WPJ-W5 microcomputer controlled shock absorber indicator fatigue comprehensive test bench is mainly used for indicator testing and fatigue life testing of cylindrical shock absorbers and dampers used in automobiles, sedans, and other motor vehicles. The whole machine has a reasonable structure, simple and reliable, accurate and convenient adjustment of test space and test stroke; The specimen clamping is convenient and reliable; The whole machine runs smoothly and is easy to maintain and upkeep.

The speed of this shock absorber dynamometer is 1m/s, and speed parameters can be set freely below this speed.

2、 Scheme description

1Host

The host is mainly composed of four parts: rack, mechanical loading mechanism, transmission mechanism, and fixture. The rack consists of columns, workbenches, excitation tables, upper crossbeams, screw lifting mechanisms, and bases. The columns, workbenches, excitation tables, upper crossbeams, and screw lifting mechanisms are installed together and stably mounted on the base; The tested shock absorber is installed between the excitation table and the worktable through a fixture, and the amplitude is adjusted to meet the requirements of specimens of different sizes and specifications. By replacing the fixture, the requirements of specimens with different installation methods are met.

2Loading mechanism

The loading mechanism is a mechanical structure mainly composed of a crank connecting rod mechanism, which converts the rotational motion of the motor into linear reciprocating motion in the vertical direction; By adjusting the eccentricity of the slider, the distance of linear reciprocating motion can be adjusted to achieve the required test stroke of the test piece.

3Transmission system

The transmission mechanism consists of a variable frequency motor and a flywheel. By adjusting the motor speed through the frequency converter, the test frequency can be adjusted arbitrarily within the range of 0~1m/s.

4Test fixtures

The test fixture is designed and produced based on the structure of the shock absorber, which is the sample. It ensures the accuracy of the experiment and allows for quick loading and unloading.

5Sensor:

5.1 Load sensor, spoke type, (DC) range ± 10kN, filtering capacity 150%. Place it at the front end of the actuator.

5.2 Before leaving the factory, the sensor calibration is completed.

6Main functional features:

6.1 The amplitude and frequency of the shock absorber can be freely adjusted.

6.2 Vibration frequency and frequency digital display.

6.3 Automatic shutdown with preset test times for higher efficiency.

3、 Fully digital electro-hydraulic controller: 1 set

1The main configuration components of the fully digital controller are:

1.1 Computer (Business Machine, 19 "LCD Monitor, Windows Operating System)

1.2 Two channel signal conditioning unit (test force, displacement)

1.3 Other necessary I/O input/output units

1.4 Dynamic testing software and shock absorber testing data processing software

2Main technical indicators of the controller

A fully digital hydraulic servo controller based on PCI bus

2.1 Control mode: Full digital PID closed-loop control for force, displacement, and deformation, with smooth and worry free switching of control modes

2.2 Main test waveform: sine wave;

2.3 Test signal measurement resolution: ≥ 1/200000, indication accuracy 0.05FS

3Software testing system:

3.1 Windows operating system, fully Chinese operating interface;

3.2 Adopt high-speed data acquisition technology to achieve multi-channel high-speed data acquisition;

3.3 The computer screen displays the test curve and various test parameters, such as force/displacement time relationship curve, force displacement relationship curve (dynamometer), test parameters (force, displacement), available power curve, linear velocity curve, sine wave fatigue curve, peak valley value, etc;

3.4 The system has file operation function for storing test curves and test data; Meanwhile, experimental data can be stored in ASCII code format, and users can use commercial data processing software for secondary data processing;

3.5 Support printing test reports with printers;

4、 Main technical specifications of the testing machine:

5Testing machine configuration:

VIWorking conditions of the testing machine

1. Within the temperature range of 100C-350C, the relative humidity is ≤ 80%;

2. Install horizontally on a stable foundation, with a levelness of 0.2/1000;

3. In an environment without vibration, corrosive media, and strong electromagnetic interference.

4. The fluctuation range of power supply voltage shall not exceed 10% of the rated voltage;

5. The distance between the two sides of the equipment and the wall should not be less than 0.8m for easy maintenance and upkeep in the future.