A hollow roller bearing for a rail transit gearbox
A roller bearing and rail transit technology, applied in the field of bearing lubrication, can solve the problems of bearing friction and heating, reducing bearing reliability and service life, cage fracture, etc., to achieve the effect of accelerating flow speed, improving heat dissipation effect, and reducing weight
Active Publication Date: 2022-06-17
CRRC DALIAN INST CO LTD
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Problems solved by technology
[0002] At present, the tapered roller bearings used in domestic rail transit gearboxes basically adopt the structural form of solid tapered roller bearings. Due to the very high rotation speed of the bearings, in the actual application process, the solid tapered roller bearings will suffer due to the maintenance of the roller pair. The impact of the frame causes the fracture of the cage; in addition, due to the harsh working conditions, a large amount of friction and heat will be generated when the bearing rotates at high speed, and a large amount of heat will reduce the reliability and service life of the bearing
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[0026] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] like Figure 1-3 As shown, a hollow roller bearing for a rail transit gearbox includes an outer ring 1, an inner ring 2, a roller 3 and a cage 4, and the roller 3 is a tapered roller with a hollow portion 31 at the axis;
[0028] The quality of the hollow tapered roller is smaller than that of the solid tapered roller. Under...
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The invention discloses a hollow roller bearing for a rail transit gearbox, which comprises an outer ring, an inner ring, a roller and a cage, and the roller is a tapered roller with a hollow part on the axis; the hollow part has : a through surface and a receiving surface, the through cavity surrounded by the through surface is located in the middle of the hollow part; the receiving cavity surrounded by the receiving surface is located on both sides of the through cavity; The intersection line of any plane where the roller axis is located is inclined relative to the direction of the roller axis; the radial cross-sectional area of the through cavity is not larger than the radial cross-sectional area of the receiving cavity. The invention adopts hollow tapered rollers, and lubricating oil can pass through the middle of the hollow rollers, which can take away the heat of the rollers and reduce the temperature of the rollers. The diameter of the roller cavity is different, and the lubricating oil enters the cavity from one end, and the radial cross-sectional area of the cavity becomes smaller and smaller, so that the flow speed of the lubricating oil is accelerated, thereby improving the heat dissipation effect.
Description
technical field [0001] The invention relates to the field of bearing lubrication, in particular to a hollow roller bearing for a rail transit gearbox. Background technique [0002] At present, the tapered roller bearings used in domestic rail transit gearboxes basically adopt the structure of solid tapered roller bearings. Due to the very high rotation speed of the bearings, the solid tapered roller bearings will be kept due to the roller pair in the actual application process. In addition, due to the harsh working conditions, a large amount of friction heat will be generated when the bearing rotates at high speed, and a large amount of heat will reduce the reliability and service life of the bearing. SUMMARY OF THE INVENTION [0003] The present invention provides a hollow roller bearing for a rail transit gearbox to solve the above problems. [0004] A hollow roller bearing for a rail transit gearbox, comprising an outer ring, an inner ring, a roller and a cage, wherein...
Claims
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IPC IPC(8): F16C19/36F16C33/66F16C37/00
CPCF16C19/361F16C33/6651F16C37/007F16C2326/10
Inventor 张福有杨英车世红崔铭杰曹金龙马刘欢
Owner CRRC DALIAN INST CO LTD