Bearing device provided with oil-gas leakproof structure

Abstract

The invention discloses a bearing device provided with an oil-gas leakproof structure. The bearing device is arranged on a motor device which comprises a motor shell and a motor rotary shaft. The bearing device comprises a bearing base, a bearing pad and a spoiler. The bearing base is fixedly arranged on the motor shell and internally provided with the bearing pad. The motor rotary shaft rotatably penetrates through the bearing pad. The spoiler is arranged on the bearing base and is close to the motor rotary shaft. According to the bearing device provided with the oil-gas leakproof structure, airflow is prevented from rotating through the spoiler, negative pressure generated through high-speed flowing of the airflow is avoided, and therefore oil-gas loss of the bearing device can be effectively avoided.

Description

technical field [0001] The invention relates to a bearing device, in particular to a bearing device which utilizes an oil-gas leak-proof structure to prevent oil-gas from escaping. Background technique [0002] The part of the output shaft of a large motor usually needs to be equipped with a sliding bearing. The contact between the sliding bearing and the output shaft needs to be lubricated with lubricating oil. The standard sliding bearings sold on the market often have oil leakage problems, which have a negative impact on the operation of the bearing. hazards, and the oil leakage problem will also cause the internal coil of the motor to be polluted, which will affect the life of the coil insulation in the long run. In addition, the problem of oil leakage will directly increase the cost of after-sales service. [0003] see Figure 1 to Figure 3 , figure 1 Shows a schematic cross-section of an existing motor bearing; figure 2 A schematic diagram showing the high-speed r...

AI Technical Summary

Problems solved by technology

When the motor operates and the motor output shaft PA200 rotates, the internal temperature of the bearing chamber rises, causing the internal oil and gas to evaporate, and the internal pressure rises. The high-speed rotation of the motor output shaft PA200 often drives the surrounding airflow to rotate and form a vortex S1, especially near The part of the bearing seat PA1 will be blocked by the bearing seat PA1, so that the airflow driven by the motor output shaft PA200 will flow along the wall of the bearing seat PA1, thereby increasing the flow velocity of the airflow, and correspondingly increasing the shaft surface pressure. Reduced to form a negative pressure, such as image 3 As shown in the distance and pressure change curve C1, at this time, the lubricating oil in the contact part of the motor bearing device PA100 and the motor output shaft PA200 will easily be negatively pressured by the internal oil gas through the oil seal gap due to the reduced pressure (equivalent to negative pressure). If it is taken out of the bearing seat PA1, the amount of oil inside the bearing seat PA1 will decrease, resulting in leakage of lubricating oil, which will affect the operation of the motor bearing, and often cause more serious damage over time

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