Joint bearing low-temperature wear test system and assembly method thereof

Abstract

The invention provides a joint bearing low-temperature wear test system. The system comprises a base, a temperature box, a radial stress subsystem, a power subsystem, a temperature control subsystem, a wear measurement subsystem and a clamp subsystem. The clamp subsystem comprises a pushing block, a loading plate, an accompanying test bearing seat, a mandrel, an accompanying test bearing, an end cover and a locking part, which are independent detachable parts; the mandrel, the pushing block or the loading plate can be replaced to realize clamping in a life test of joint bearings with different diameters, so that the utilization rate and the universality of a test clamp are improved; and in addition, the clamp subsystem adopts the structural design improvement that a single-side flange is added to an inner hole of the loading plate, the thickness of the pushing block is reduced, the flange and the end cover cooperatively fix the accompanying test bearing, and the like, so that the mandrel deformation or breakage easily caused in the joint bearing wear test process is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of reliability appraisal of mechanical equipment, and in particular relates to a low-temperature wear test system for joint bearings and an assembly method thereof. Background technique [0002] The low temperature wear test of spherical plain bearings is used to evaluate the anti-wear performance indicators of spherical plain bearings in low temperature environments. It is an important criterion for the design, development, customization and selection of spherical plain bearing models. During the low-temperature wear identification test, the control of temperature, load, and reciprocating motion state requires real-time control, and the entire test process has a long operating cycle, so a test system with a high degree of automation is required to achieve external environmental conditions, load conditions, and operation. The conditions can meet the requirements of the appraisal test program in real time, an...

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Problems solved by technology

[0003] However, the existing system has the following problems: (1) The existing life test fixture structure cannot guarantee the rigidity of the mandrel, and the mandrel is prone to brittle fracture under the large bending moment generated by the large radial load. Taking wide series self-lubricating spherical plain bearings as an example, the radial load of the life test is 1.3-1.5 times that of other types of spherical plain bearings with the same inner diameter, and the mandrel is more prone to brittle fracture; When completing the life test of different types of spherical plain bearings, fixtures of various specifications are required, resulting in a great waste of funds, time and resources; (3) The test fixture is bulky, and the space of the temperature box is relatively small, which is not easy for the tested product and test The installation of the fixture is fixed, and the installation process is relatively cumbersome and laborious, which greatly prolongs the test preparation time

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