A h-shaped shallow cavity dynamic and static pressure mixed water lubricated radial bearing with circumferential communication groove

Abstract

The invention discloses an H-shaped shallow cavity dynamic / static-pressure mixed water lubrication radial bearing provided with annular communication grooves, and belongs to the field of bearing design and manufacturing. The H-shaped shallow cavity dynamic / static-pressure mixed water lubrication radial bearing comprises shaft diameters, H-shaped static-pressure cavities, throttling holes, shaft sleeves and the annular communication grooves. 4-6 H-shaped static-pressure cavities are uniformly arranged on the inner surface of a shaft sleeve in the peripheral direction; and the depths of the static-pressure cavities are 2-7.5 times of a radial gap. The adjacent H-shaped static-pressure cavities communicate through the annular communication grooves. The throttling holes of throttles are formedin the centers of peripheral transverse separators of the H-shaped static-pressure cavities; and lubrication water enters the H-shaped static-pressure cavities by the throttling holes through a watersupply device. The shaft diameters are sleeved in the shaft sleeves. The H-shaped shallow cavity dynamic / static-pressure mixed water lubrication radial bearing has excellent operation characteristicsand machining performances; through reduction of the depths of the static-pressure cavities and reduction of the difficulty and the cost of a bearing overlaying process, a dynamic-pressure effect ofa fluid is fully used for improving the bearing capacity of bearing and reducing the friction force of the bearing; multiple times of tool setting in the machining process can be prevented through theannular communication grooves, so that the relative position control precision of the static-pressure cavities in the machining process is improved, the water supply quantity is increased by a smallamplitude, and the temperature rise of the bearing is reduced.

Description

technical field [0001] The invention belongs to the field of bearing design and manufacture, and relates to an H-shaped shallow cavity dynamic and static pressure mixed water lubricated radial bearing provided with a circumferential communication groove, which can reduce bearing friction and temperature rise, and improve bearing capacity and ease of processing . Background technique [0002] Bearings are the core lubricated load-bearing components of various rotating machinery, and have a vital impact on the performance indicators of the entire system, such as load capacity, friction power consumption, service life, and operating accuracy. There are many types of bearings, and the classification is complicated. According to the movement mode, they can be divided into rolling bearings and sliding bearings. According to the relative position between the running direction and the bearing capacity direction, they can be divided into thrust bearings and radial bearings. Water lu...

AI Technical Summary

Problems solved by technology

If the depth of the static pressure chamber is too deep, thicker alloy materials need to be surfacing. This will lead to a longer production cycle and a sharp increase in cost. Successful welding requires careful and in-depth design of the depth of the static pressure chamber

Obviously, the design of the depth of the static pressure chamber cannot assume that the pressure of the static pressure chamber is uniform, and it needs to be solved as an unknown through the Reynolds equation, and we have solved this problem in the previous research

In the previous research, it was also found that the shape of the static pressure chamber of ordinary dynamic and static pressure bearings is often designed as a rectangle (expanded along the circumferential direction). This kind of static pressure chamber has a simple structure and is easy to process, but it is not the best shape for bearing performance.

In addition, the static pressure chamber of the bearing is processed on the cylindrical surface of the shaft sleeve, and it is often necessary to process multiple static pressure chambers. It is difficult to accurately position during processing. If the static pressure chambers are completely independent, it is necessary to It is difficult to ensure the control accuracy of the relative position of each static pressure chamber due to multiple tool setting

[0005] Obviously, the above-mentioned problems or influencing factors need to be considered comprehensively in bearing design, but at present, there is still a lack of dynamic and static pressure water lubricated bearing products and designs for nuclear pumps in China, and although there are related products abroad, their product designs are not The combined effects of the above factors are not fully considered

Images