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Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing

A technology of dynamic and static pressure bearings and high-speed electric spindles, which is applied to metal processing equipment, etc., can solve problems such as unreliable sealing and unsatisfactory sealing effects, and achieve the effects of reliable sealing, ingenious design, and reduced processing costs

Inactive Publication Date: 2014-07-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sealing structure has the problem of unreliable sealing, especially in the case of ultra-high-speed operation of the electric spindle, the sealing effect is not ideal

Method used

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  • Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing
  • Super-high-speed electric main shaft sealing structure adopting water lubricating static pressure bearing

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Embodiment Construction

[0014] Such as figure 1 As shown, in the water-lubricated bearing sealing structure of the electric spindle of the present invention, the sliding bearing 10 is sleeved on the electric spindle 1 extending from the motor rotor 12, and the electric spindle 1 at the two ends of the sliding bearing 10 is sleeved with front and rear symmetrical air seal covers 2 , 11, and fastened with the sliding bearing 10, the sliding bearing is provided with an air inlet channel 8 and a drain channel 18. On the axial ends of the inner wall of the sliding bearing 10, there are symmetrical annular primary water return grooves 7, 17, the outer side of the annular primary water return groove 7, 17 is provided with annular secondary water return grooves 8, 16 and the outer side of the annular secondary water return groove 8, 16 is provided There are annular three-stage return water tanks 9, 15; the three-stage front and rear annular return water tanks are connected by a drainage channel 18 to discharge...

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Abstract

The invention discloses a super-high-speed electric main shaft sealing structure adopting a water lubricating static pressure bearing. The super-high-speed electric main shaft sealing structure comprises a sliding bearing which is sleeved on an electric main shaft which stretches out of a motor rotor, wherein the electric main shafts at the two ends of the sliding bearing are sleeved with front and back symmetrical gas sealing covers and are fastened with the two ends of the sliding bearing; the super-high-speed electric main shaft sealing structure is characterized in that the sliding bearing is internally provided with a gas inlet channel and a water discharging channel; an annular gas pressure sealing device, which is communicated with the outer part through the gas inlet channel, is arranged between each gas sealing cover and the electric main shaft; a gas blowing channel is formed by a gap between the gas sealing cover and the electric main shaft; annular multi-grade water returning grooves are symmetrically arranged at the axial two ends of the inner wall of the sliding bearing; and the annular multi-grade water returning grooves are communicated with the outer part through the water discharging channel.

Description

Technical field [0001] The invention relates to a sealing device for a high-speed motor main shaft, in particular to a water-lubricated hydrodynamic and static pressure bearing sealing structure adopting a motor built-in electric main shaft. Background technique [0002] The design and manufacturing level of high-speed CNC machine tools determines the level of my country's entire manufacturing industry, and the core component of modern high-speed CNC machine tools is the high-speed electric spindle device, whose performance directly affects the high-speed precision machining accuracy of the machine tool. The structure of the water-lubricated dynamic and static piezoelectric spindle with a built-in motor has the following advantages: first, the structure is compact, and the weight is reduced; second, the bearing is in a better condition, not easy to cause load bias, and has higher accuracy. The electric spindle makes a rotary motion under the support of the oil film of the water-l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B19/02
Inventor 陈渭吴连军范洪杰
Owner XI AN JIAOTONG UNIV
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