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Automobile Wheel Hub Bearing Mud Testing Machine

Automobile Hub Bearing Simulation Testing Machine

Model: UT1011H-2070; ISO 281, ISO 16281

Automobile Hub Bearing Simulation Testing Machine is used for the working condition simulation (high temperature and general durability) test and fatigue test of the first, second and third generation automobile wheel bearings. The testing machine has two modes of manual and automatic control, according to the load spectrum, the speed spectrum of the hub bearing for high temperature simulation and general durability test, the test data is automatically collected by the computer.


Conform with standard: ISO 281: Rolling bearings - Dynamic load ratings and rating life 

ISO 16281: Rolling bearings - Methods for calculating the modified reference rating life for universally loaded bearings

General introduction

The automotive wheel bearing simulation performance testing machine is used for the working condition simulation (high temperature and general durability) test and fatigue test of the first, second and third generation automobile wheel bearings. The testing machine has two modes of manual and automatic control, according to the load spectrum, the speed spectrum of the hub bearing for high temperature simulation and general durability test, the test data is automatically collected by the computer.


Conform with standard: ISO 281: Rolling bearings - Dynamic load ratings and rating life 

ISO 16281: Rolling bearings - Methods for calculating the modified reference rating life for universally loaded bearings


Key Features

  • Main frame
  • Bench
  • Hydraulic loading system
  • Lubrication system
  • High temperature environmental chamber
  • Electronic control system
  • Standard

The main body of the test is the core part of the testing machine. It is composed of the main shaft system, axial and radial loading mechanisms, and the base. The shafting of the main body of the test adopts cantilever structure, and the test bearing is easy to assemble and disassemble. The axial and radial loading mechanisms are perpendicular to each other, and the loading radius and the position of the radial force application point can be freely adjusted according to the test requirements;

Automobile Hub Bearing Simulation Testing Machine

The bench components are composed of the bed frame, anchor screws, foot horns, etc., as shown in Figure 3. The bed frame is welded from 10mm thick steel plate, which is annealed for stress relief after welding, and the surface is sprayed with plastic after processing. In order to ensure that the test bench is placed horizontally in the laboratory environment, and the subsequent convenient displacement, a foot is installed at the bottom of the bed, and in order to meet the support weight requirements, the base is M14 in this scheme, the adjustable height is 55mm, the contact radius with the ground R=50mm, and the single can bear 2000kg. The form of the footing is shown in Figure.


The hydraulic loading system is one of the key supporting systems of this testing machine, and during the bearing test, in order to simulate the working conditions of the bearing, the preset radial load and axial load should be applied to the test bearing. The radial and axial loading of this testing machine is controlled by proportional pressure reducing valve, and the pressure oil output by the hydraulic pump enters the proportional pressure reducing valve through the oil filter, relief valve, and one-way valve, and the proportional pressure reducing valve continuously outputs stable oil pressure under the action of the computer, and pushes the radial cylinder and the axial cylinder to apply the required load to the test bearing.

Main technical indicators and requirements: 1) Medium: 32# anti-wear hydraulic oil

2) Hydraulic loading form: proportional loading

3) Pressure output range: 0.5~10MPa, steady-state accuracy≤±1%FS;

4) Filtration: coarse filtration (greater than 80um) + precision filtration (30um)

5) Cooling method: water-cooled/air-cooled (optional)

6) Pressure monitoring: equipped with digital pressure gauge and pressure sensor

7) Oil temperature detection: equipped with temperature sensor

8) Liquid level detection: equipped with liquid level gauge

9) Error-proofing: temperature alarm, pressure alarm, liquid level alarm.


The lubrication system of this testing machine is to provide reliable lubrication for the supporting bearings of the testing machine to ensure the normal operation of the testing machine. The oil supply pump draws the oil out of the oil tank and sends it to the supporting bearings of the testing machine through the check valve, relief valve and oil filter. The return pump pumps the lubricating oil that flows into the casing after lubrication back to the oil tank to create a circulation. The main technical indicators of this lubrication system are as follows:

Oil supply flow: 0~20L/min Oil supply pressure: 0~1MPa Oil return capacity: ≥40L/min

Cooling method: water-cooled/air-cooled (optional)


The bearing test environment is simulated by means of a high-temperature chamber, as shown in Figure The high-temperature environmental chamber is composed of a heating system, an air circulation system and a control system. The test bearing is located in the test chamber of the high-temperature environmental chamber, and the high-temperature environmental chamber air circulation system sends the high-temperature air to the test chamber to make the ambient temperature of the bearing reach the temperature required for the test. The temperature range of the high-temperature environmental chamber is: room temperature ~ 150°C, and the control error ±3°C.


The electronic control system is mainly responsible for the drive of the test spindle, the load control of the test bearing, the bearing temperature test, the main body vibration test, etc. The electronic control system consists of an electrical system and a measurement and control system.

2.7.1 Electrical system The electrical system of the testing machine is composed of an industrial computer, a control cabinet, an interface box, and a measurement and control unit

The elements are concentrated in a separate control cabinet, as shown in Figure 7. The industrial computer is the core of the electrical system, responsible for data testing and work control; The control cabinet is the power supply and power drive part, and it is also the manually operated console; The interface box is responsible for the pre-processing of the measurement and control signal; The measurement and control unit includes sensors, motors, heaters, etc., to complete the test of test signals, and the real-time control of motors and heaters.

(1) Industrial computer

The data acquisition card and control card in the industrial computer are responsible for test data collection, working status monitoring and process control.

(2) Control cabinet

The control cabinet is mainly composed of DC power supply, frequency converter, contactor, circuit breaker, solid-state relay and electrical button knob, etc., which provides working power for the test sensor, drives the motor, and controls the load or speed.

(3) Interface box

It is composed of a signal adapter board and a power driver board to complete the preprocessing of the test signal; Transmission of control signals and communication signals.

(4) The measurement and control unit of the main body of the test is mainly composed of (temperature, vibration and force) sensors, motors (spindle motors, lubricating oil motors), and frequency converters

and the associated electrical component composition. The sensor collects the test signal; Hydraulic proportional valve controls the output pressure; Lubricating oil motors provide test lubrication.


2.7.2 Measurement and control system Electrical measurement and control system: It is composed of electrical operation control system, frequency conversion speed regulation system and computer measurement and control system.

(1) Control system

The control system is divided into two control modes: manual operation and computer automatic control. a. Control parameters: start/stop of each electrical equipment, motor speed; b. The manual control system is composed of the electrical equipment on the panel, such as the start/stop light button, control knob, digital display table, etc. c. The automatic control system monitors the temperature, pressure, speed, vibration and other signals in real time, and is realized by the measurement and control interface.

(2) Frequency conversion speed regulation system The speed regulation system is composed of a computer, a Delta inverter and a motor. The computer is the upper computer, and the inverter is

Lower computer.

In manual mode, the motor working frequency is given by the digital operator, and the inverter test data is transmitted to the computer; In automatic mode, RS485 is passed by the computer

(3) Computer measurement and control system

The upper computer uses Advantech's industrial computer, the operating system uses 64-bit Windows 10 Chinese operating system, Intel i7 processor or above, memory 16G, storage capacity 1 TB. The upper computer Labview software implements the work


ISO 281: Rolling bearings - Dynamic load ratings and rating life 


ISO 16281: Rolling bearings - Methods for calculating the modified reference rating life for universally loaded bearings


Main technical specification

Test TypeHub bearing test
Test inner diameter rangeφ20~φ70 mm
Maximum test loadradial 20kN, axial ±15kN, control accuracy±1%FS
Maximum test speed2000 rpm
Heating temperatureroom temperature ~ 150 °C, control accuracy ± 3 °C
Test MethodComputer automatic control, monitoring and recording
Test parametersspeed, load, temperature, vibration, motor current, etc.,


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