Cause detection and analysis of excitation in the use of Koyo bearing
Excitation caused by the change of the number of loaded rolling elements
When a radial load is loaded on the Koyo bearing, the number of rolling elements bearing the load will change slightly during operation, that is, this causes the offset of the load direction. The resulting vibration is inevitable, but can be reduced by axial preloading. It is loaded on all rolling elements, but it is not suitable for cylindrical roller bearings.
2. Waviness of components
When the bearing ring fits closely with the bearing seat or transmission shaft, the Koyo bearing ring may be deformed by matching with the shape of adjacent components. If deformation occurs, vibration may occur during operation. Therefore, it is important to machine the bearing pedestal and drive shaft to the required tolerances.Cause detection and analysis of excitation in the use of Koyo bearing
Partial damage of bearing
A small number of bearing raceways and rolling elements may be damaged due to incorrect operation or installation. During operation, rolling over damaged bearing parts will produce specific vibration frequency. Vibration frequency analysis can identify damaged bearing components.
Koyo bearing is the key equipment of the ultrasonic cleaning machine system. Because the working condition of the bearing of the cleaning machine is particularly bad, it should operate under the condition of continuous impact, vibration and overload, and the service life is required to be more than 15 years, with particularly high reliability requirements. Therefore, the use of the ultrasonic cleaning machine puts forward higher requirements for the design and manufacture of the bearing.
During the repair process, the bearing is always in the normal temperature state, without internal stress, thermal deformation, crack, annealing and softening, and without the potential impact of fracture and crack. High bonding strength, no falling off, no hard spots, high surface finish and adjustable hardness.
It can repair low carbon steel and low carbon alloy steel, medium carbon steel and medium carbon alloy steel, high carbon steel and high carbon alloy steel, high strength alloy steel, stainless steel, cast steel, cast iron, copper and copper alloy, aluminum and aluminum alloy, zinc and zinc alloy, chromium, nickel, chromium nickel steel and unknown materials.Cause detection and analysis of excitation in the use of Koyo bearing
The repair position is accurate and flexible, and the repair quantity can control the accuracy. It can also be repaired on site without disassembly. After repair, the position can be grinded by tooling technology to accurately restore the size. The cleaning machine is used for grinding cement, coal and other industrial raw materials such as construction, chemical industry and ceramics.
It has a series of advantages, such as small volume, light weight, less land occupation, low power consumption, more than 30% of the agreement on energy saving, long service life and so on.Cause Detection and Analysis of Excitation in the Use of Koyo Bearing
(1) When assembling the Koyo bearing, the maintenance personnel did not carefully implement the process and forcibly knocked the bearing, resulting in the plastic deformation of the cage, which exacerbated the friction between the cage and the rolling element, and even clamped the rolling element and could not rotate.
The bearing was subjected to the action of strong impact alternating load in motion, resulting in the damage of the cage and the crushing of the ball.Cause detection and analysis of excitation in the use of Koyo bearing
(2) Due to the improper adjustment of the paper pad between the bearing gland and 4631l bearing outer ring by the maintenance personnel, the axial displacement of the bearing increases, and the cage is damaged and the ball is broken under the action of strong impact load.Cause detection and analysis of excitation in the use of Koyo bearing
(3) The residual stress generated during grinding and heat treatment of Koyo bearing itself leads to excessive thermal stress and sharp reduction of fatigue strength during high load movement, resulting in cage damage and ball crushing.Cause detection and analysis of excitation in the use of Koyo bearing