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Dynamic and static pressurized-water bearing used for electric spindle auxiliary support with rear-mounted motor

An auxiliary bearing, rear-mounted technology, applied in the direction of shafts and bearings, bearing components, engine seals, etc., can solve the problems of friction and wear of rolling bearings, high manufacturing accuracy requirements, restricting the performance of the main shaft, etc., to achieve high rotational accuracy and large critical speed , the effect of low power consumption

Inactive Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electric spindle with the motor in the middle installs the motor between two radial supports, which has a compact structure and high critical speed, but requires high manufacturing precision and difficult to assemble and disassemble the spindle; the rear-mounted electric spindle has two basic supports and an auxiliary support, The motor is installed at the front end of the auxiliary support, and the auxiliary support is installed at the end of the main shaft. Usually, a rolling bearing is used as the auxiliary support, which has the advantages of simple structure, convenient manufacturing, assembly and disassembly, and maintenance. Serious, the life is short, which restricts the further improvement of the performance of the spindle

Method used

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  • Dynamic and static pressurized-water bearing used for electric spindle auxiliary support with rear-mounted motor
  • Dynamic and static pressurized-water bearing used for electric spindle auxiliary support with rear-mounted motor

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Embodiment Construction

[0013] The present invention is a dynamic and static pressure water bearing used for the auxiliary support of the motor rear-mounted electric spindle. The auxiliary bearing body 3 is installed in the auxiliary bearing seat 2 and is located at the end of the main shaft 6. The axial positioning and fixing of the auxiliary bearing body 3 is realized through the shoulder, step of the main shaft 6 and the rib of the auxiliary bearing seat 2; the auxiliary bearing body 3 There is a working cavity 13 on the inner side of the working cavity, and the small hole restrictor 5 is installed in the conical surface outside the working cavity 13, and is fixed by the locking screw 4 through threads; the working cavity 13 is passed through the small hole restrictor 5, the locking screw 4 and the The water inlet ring 15 communicates with the water inlet hole 14 of the auxiliary bearing seat 2, and the sealing ring 16 is used on both sides of the water inlet ring 15 to realize sealing; the two sid...

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Abstract

The invention relates to a dynamic and static pressurized-water bearing used for an electric spindle auxiliary support with a rear-mounted motor. The bearing comprises an auxiliary bearing body 3, a small hole throttling device 5, a locking screw 4, an auxiliary bearing pedestal 2 and a sealing ring 16. The bearing is characterized in that the auxiliary support dynamic and static pressurized-water bearing is installed at the rear end of the spindle motor; and an asymmetrical gas sealing structure integrated with the bearing is adopted at the two ends of the auxiliary support dynamic and static pressurized-water bearing. The auxiliary support dynamic and static pressurized-water bearing can effectively reduce the friction loss of the bearing, reduces the heat generating amount, increases the electric spindle end rigidity, improves the spindle first-order critical speed and enhances the stability of rotor movement.

Description

technical field [0001] The invention relates to a dynamic and static pressure water bearing used for the auxiliary support of a motor rear-mounted electric spindle, and belongs to the technical field of high-speed processing machine tools. Background technique [0002] At present, the commonly used electric spindle support forms include the motor-mounted type and the motor-rear-mounted type. The electric spindle with the motor in the middle installs the motor between two radial supports, which has a compact structure and high critical speed, but requires high manufacturing precision and difficult to assemble and disassemble the spindle; the rear-mounted electric spindle has two basic supports and an auxiliary support, The motor is installed at the front end of the auxiliary support, and the auxiliary support is installed at the end of the main shaft. Usually, a rolling bearing is used as the auxiliary support, which has the advantages of simple structure, convenient manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/72F16J15/40
CPCF16C33/723F16J15/40
Inventor 蒋书运林圣业
Owner SOUTHEAST UNIV
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