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Hydrostatic hemispheroidal rotation pair

A hemisphere and rotating pair technology, applied in the field of machinery, can solve the problems of difficulty, low efficiency and high processing cost in precision machining of spheres and chambers, and achieve the effect of reducing processing cost, reducing processing difficulty and improving work efficiency.

Inactive Publication Date: 2018-06-05
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the basic principle of gas (air) or liquid (oil) static pressure technology, the liquid or gas medium enters the multiple chambers of the concave spherical surface of the ball bearing respectively. When the convex ball rotates, the medium is formed from the multiple chambers. Dynamic pressure, the higher the speed of the convex ball, the higher the density of the medium, the smaller the gap between the concave and convex balls, the greater the dynamic pressure, because there is a certain gap between the concave and convex spherical surfaces, the convex ball floats and is in a non-contact state when rotating, but The precision machining of the ball and cavity of the ball bearing is difficult, the efficiency is very low, and the processing cost is high, which affects its promotion

Method used

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  • Hydrostatic hemispheroidal rotation pair
  • Hydrostatic hemispheroidal rotation pair
  • Hydrostatic hemispheroidal rotation pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the static pressure hemispherical rotating joint 100 includes a containing assembly 10 and a rotating member 20 .

[0027] The receiving assembly 10 includes a receiving member 11 and a plurality of bushes 12 .

[0028] Such as figure 2 As shown, the receiving part 11 includes a concave hemispherical surface 111 , an outer surface 112 , a plurality of channels 113 and a through hole 114 .

[0029] However, in some occasions where the shaft does not need to pass through, the receiving part 11 may not be provided with the through hole 114 . In this embodiment, the receiving part 11 is provided with a through hole 114 for passing the shaft in the horizontal direction at the center of the concave hemispherical surface 111, and the receiving part 11 is made of metal.

[0030] The channel 113 is arranged in the inner wall of the receiving part 11 and runs through the concave hemispherical surface 111 and the outer surface 112. The channel 113 in...

Embodiment 2

[0036] Other structures of this embodiment are the same as those of Embodiment 1, except that the shape of the bushing cavity 121 is any one of circle, ellipse, square, rectangle and trapezoid.

[0037] The shape of the opening of the bushing cavity 121 in the second embodiment is oval.

Embodiment 3

[0039] The other structure of this embodiment is the same as that of the second embodiment, the difference is that the depth of the bushing cavity 121 is 0.5-5mm, and the total surface area of ​​the bushing cavity 121 accounts for 40-60% of the total surface area of ​​the concave hemispherical surface.

[0040] In the third embodiment, the depth of the indentation of the bushing cavity 121 is 2 mm, and the total surface area of ​​the bushing cavity 121 accounts for 45% of the total surface area of ​​the concave hemispherical surface 111 .

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Abstract

The invention relates to a hydrostatic hemispheroidal rotation pair which comprises an accommodation component and a rotor, wherein the accommodation component comprises an accommodation piece and a plurality of bushings; the rotor is provided with a convex hemispherical surface matched with a concave hemispherical surface; the accommodation piece is provided with a plurality of channels allowingfluid to pass through; the channels are arranged in an internal wall of the accommodation piece and penetrate through the concave hemispherical surface and an external surface; the channels comprise first concave cavities indented inwards, and hole channels communicating the first concave cavities and the external surface; the bushings are provided with columnar bushing concave cavities; the bushings are arranged at openings of the first concave cavities; openings of the bushing concave cavities face towards the concave hemispherical surface; and the bottoms of the bushing concave cavities arecommunicated with the first concave cavities. According to the hydrostatic hemispheroidal rotation pair, a convex sphere and a concave spherical surface are not contacted with each other during rotation; compared with a hydrostatic cone rotation pair, the hydrostatic hemispheroidal rotation pair has better concentric fit; and therefore, dynamic rotation accuracy of a rotation shaft on the rotation pair can be improved by using a gas or liquid hydrostatic technology.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a static pressure hemispherical revolving pair. Background technique [0002] Most of the revolving pairs in the prior art are in a contact state when rotating, and the rotating precision and efficiency are not high. [0003] Bearings that use gas or hydrostatic technology combined with spherical structures are currently one of the most effective ways to improve the rotation accuracy of the spindle. [0004] According to the basic principle of gas (air) or liquid (oil) static pressure technology, the liquid or gas medium enters the multiple chambers of the concave spherical surface of the ball bearing respectively. When the convex ball rotates, the medium is formed from the multiple chambers. Dynamic pressure, the higher the speed of the convex ball, the higher the density of the medium, the smaller the gap between the concave and convex balls, the greater the dynamic pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
CPCF16C32/0633
Inventor 黎永明沈景凤王振华
Owner UNIV OF SHANGHAI FOR SCI & TECH