Low-coupling axial and radial combined loading device for rolling bearing and loading method
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A rolling bearing and compound loading technology, applied in the direction of mechanical bearing testing, etc., can solve the problems of large lateral stiffness of the loading device, incomplete loading of the load, inaccurate loading of the load, etc., to avoid the influence of the test load, low axial and lateral stiffness, Eliminate the effects of mutual influence
Inactive Publication Date: 2015-12-16
HARBIN INST OF TECH
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[0003] The present invention aims to solve the problem that when the axial load and the radial load are applied to the tested bearing at the same time, the lateral friction force between the bearing and the load contact surface is large after loading, the lateral stiffness of the loading device is large, and the gap between the loading head and the test tooling in one direction The friction force between them restricts the movement of the loading head in the other direction, which in turn affects the application of the load in the other direction, so that the load in one or two directions cannot be fully loaded to the tested bearing, resulting in inaccurate load loading.
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specific Embodiment approach 1
[0027] Specific implementation mode one: refer to Figure 2 to Figure 4 Specifically explain this embodiment, the low-coupling axial and radial compound loading device for rolling bearings described in this embodiment, which includes a hydraulic system and two loading heads,
[0028] The hydraulic system connects two loading heads at the same time. The hydraulic system provides pressure oil for the loading head. One loading head is used to install between the radial loader and the rolling bearing test fixture, and the other loading head is used to install the axial loader. and rolling bearing test fixture,
[0029] The hydraulic system includes small oil tank 1, cooler 2, No. 1 oil filter 3, hydraulic pump 4, No. 2 oil filter 6, No. 1 overflow valve 7, No. 2 overflow valve 17, No. 1 throttle valve 8, No. two throttle valve 18, No. one check valve 9 and No. two check valve 19,
[0030] The small oil tank 1 is located at the lower part of the oil return port of the rolling bea...
specific Embodiment approach 2
[0044] Specific embodiment 2: This embodiment is a further description of the low-coupling axial and radial composite loading device for rolling bearings described in specific embodiment 1. In this embodiment, the hydraulic system also includes No. 1 pressure gauge 5, No. 2 pressure gauge Pressure gauge 10 and No. 3 pressure gauge 20,
[0045] The No. 1 pressure gauge 5 is set on the oil outlet pipeline of the hydraulic pump 4, the No. 2 pressure gauge 10 is set on the oil inlet pipeline of 14, and the No. 3 pressure gauge 20 is set on the pressure oil inlet 14-1 of the other loading head. on the oil inlet line.
specific Embodiment approach 3
[0046] Specific embodiment three: This embodiment is to further explain the low-coupling axial and radial composite loading device of the rolling bearing described in specific embodiment one. Lubricant in between.
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Abstract
The invention discloses a low-coupling axial and radial combined loading device for a rolling bearing and a loading method, and relates to the loading field of bearing tests. The low-coupling axial and radial combined loading device for the rolling bearing and the loading method aim to solve a problem in the prior art that the transverse friction between contact surfaces of the bearing and the load is high after loading when an axial load and a radial load are applied to a tested bearing simultaneously, the transverse stiffness of the loading device is great, the friction between a loading head in one direction and a test assembly restricts movement of a loading head in another direction, application of the load in the other direction is further affected, loads in one or two directions cannot be completely loaded to the tested bearing, and loading of the loads is caused to be inaccurate. According to the invention, a small oil tank is placed below the bearing, a hydraulic pump extracts oil in the small oil tank, then the extracted oil is injected into a pressure oil inlet, a liquid hydrostatic pressure bearing ability is generated after the oil flows through a liquid hydrostatic pressure orifice, a hydraulic moving disc and a hydraulic static disc are connected through an elastic connecting sleeve, and a coupling effect of loads in different directions is reduced. The loading device and the loading method provided by the invention can be applied to a test device which needs to simultaneously apply two loads which are vertical with each other in direction.
Description
technical field [0001] The invention relates to a load loading device and a loading method for bearings. It belongs to the loading field of bearing test load. Background technique [0002] Rotor test technology is an important part of mechanical system test, and it is the premise of rotor system and supporting bearing life assessment, performance assessment, design and manufacturing parameter verification and reliable application. Sometimes it is necessary to apply axial and radial loads to the rotor system or supporting components during the test. Rolling bearings are the supporting components of the rotor system, and their tests are typical rotor tests. Bearing tests are generally carried out on bearing testing machines. Load simulation is one of the key working conditions of bearing testing during bearing testing machine testing. Whether the loading is accurate or not directly affects the credibility of the test results. Due to the clearance of the bearing and the cont...
Claims
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