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PQW-20000 Wheel rim rotary bending test bench

With the development of heavy load, light weight and long service life of trucks, construction machinery and rail transit vehicles, the fatigue reliability of wheels, as the key bearing and walking parts, directly determines the safety and operation and maintenance costs of the whole vehicle. Rim bears complex bending stress caused by the combined action of vehicle weight, cornering lateral force, road excitation and braking torque, and fatigue fracture has become one of the main modes of wheel failure.

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Introduction

1.1 Project background

The traditional wheel bending fatigue test mostly uses hydraulic actuator to carry out low-frequency pulsating loading, which has the limitations of low loading frequency (usually ≤5 Hz), small loading force, large equipment occupation and high energy consumption. The scheme of "centrifugal force loading of rotating weight" proposed in this scheme can generate constant amplitude alternating bending moment under high-speed rotation, and truly simulate the bending stress cycle of the rim when the vehicle is driving at high speed. More than 10 cycles can be completed in a single test, which significantly improves the test efficiency and scene restoration.

This equipment is mainly used for the type test, ex-factory inspection and fatigue life research of the truck wheel rim (12 "–26"). With the help of the two-component sensor and the laser displacement sensor, the bending moment response and bending deformation data of the wheel rim can be obtained synchronously, which provides a high-confidence test basis for wheel structure design, material selection and process optimization.

Parameters

serial number	Parameter name	index value	remarks
1	Maximum loading moment	20 kN·m	Adjustable 0.5–20 kn m
2	Bending moment loading mode	Centrifugal force of rotating weight	m·r·L·ω²
3	Speed range	0–1500 r/min	Continuously adjustable
4	Main motor power	≥ 7.5 kW	Frequency conversion three-phase asynchronous motor
5	Adapted rim specification	16″–26″	Truck wheel rim
6	Rim clamping mode	T-groove chuck+center positioning	Avoid scratching
7	Bending moment measurement	Bicomponent sensor
8	Displacement measurement	Laser displacement sensor ×2	Circumferential uniform distribution
9	Number of test cycles	≥ 1× 10 times	Settable
10	Total power of equipment	≤ 10 kW	Including control and assistance
11	Overall dimension (L×W×H)	About 3.2 × 2.0 × 2.4 m	Including protective cover
12	Total equipment mass	About 3500 kg	Including flywheel+weight
13	the protection grades	IP54	Electric cabinet
14	Noise level	≤ 78 dB(A)	Station 1 m distance