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Dynamic pressure cylinder bearing
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A bearing and cylinder technology, applied in the field of dynamic pressure cylinder bearings, can solve the problems of high processing cost and high processing accuracy requirements, and achieve the effect of improving dynamic rotation accuracy
Inactive Publication Date: 2018-06-12
UNIV OF SHANGHAI FOR SCI & TECH
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[0005] According to the basic principle of gas (air) or liquid (oil) dynamic pressure technology, the liquid or gas medium enters the multiple chambers of the concave cylindrical surface of the cylinder bearing respectively. When the convex cylinder rotates, the medium flows from the multiple chambers. The dynamic pressure is formed in the middle, the higher the speed of the convex cylinder, the higher the density of the medium, the smaller the gap between the concave and convex cylinders, the greater the dynamic pressure, because there is a certain gap between the concave and convex cylinders, the convex cylinder floats, and it is in non-contact when rotating state, but the machining accuracy of the concave cylindrical surface and the chamber of the cylindrical bearing is high, and the machining cost is high
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Embodiment 1
[0029] Such as figure 1 As shown, the dynamic pressure cylindrical bearing 100 includes a housing assembly 10 , a rotating member 20 and a support seat 30 .
[0030] Such as figure 2 As shown, the accommodating component 10 in this embodiment is the accommodating part 11 , and the accommodating part 11 includes a concave cylindrical surface 111 , an outer surface 112 , a plurality of dynamic pressure channels 113 and through holes 114 .
[0031] 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 in the horizontal direction at the center of the concave cylindrical surface 111 for the rotation shaft to pass through, and the receiving part 11 is made of metal.
[0032] Such as figure 2 , image 3 As shown, the dynamic pressure channel 113 is disposed in the inner wall of the container 11 and penetrates the...
Embodiment 2
[0041] The other structures of this embodiment are the same as those of Embodiment 1, except that the section of the first concave cavity 113a along the arrangement plane is as follows: image 3The two ends of the shown crescent shape or the section along the layout plane are wedge-shaped, and the shape of the opening of the first cavity 113a is any one of circle, ellipse, square, rectangle and trapezoid. The gap ratio is 2-2.5, and the expression of the gap ratio is t2 / t1, t2 is the distance between the bottom of the first concave cavity and the outer convex cylinder, and t1 is the distance between the inner concave cylinder and the outer convex cylinder. When the gap ratio is 2.2, the bearing capacity is the largest. It depends on factors such as load, speed, oil viscosity, shaft and bearing materials and machining accuracy.
[0042] In the second embodiment, the section of the first cavity 113a along the arrangement plane is crescent-shaped, the opening of the first cavity...
Embodiment 3
[0044] Such as Figure 5 As shown, the difference of this embodiment is that the containing assembly 10 includes a containing part 11x and a plurality of dynamic pressure bushings 12, and other structures are the same as those of the first embodiment.
[0045] Such as Image 6 As shown, the receiving part 11x includes a concave cylindrical surface 111x, an outer surface 112x, a plurality of dynamic pressure channels 113x and a through hole 114x.
[0046] The channel 113x is arranged in the inner wall of the receiving part 11x and runs through the concave cylindrical surface 111x and the outer surface 112x. The channel 113x includes a concave cavity 113xa of the first example provided on the concave cylindrical surface 111x and communicates with the concave cavity 113xa of the first example. And the first example of the channel 113xb on the outer surface 112x, the channel 113x is used for passing fluid, and the external fluid enters the concave cylindrical surface 111x through...
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Abstract
The invention relates to a dynamic pressure cylinder bearing which comprises a support seat, an accommodating piece and a rotating piece, wherein the accommodating piece is provided with a plurality of dynamic pressure channels allowing fluid to pass through; the dynamic pressure channels are arranged in the inner walls of the accommodating piece, penetrate through an indent cylinderical surface and an outer surface and comprise first concave cavities and first pore passages; the first concave cavities are formed in the indent cylinderical surface and are concave inwards; the first pore passages communicate with the first concave cavities and the outer surface; the first concave cavities are formed in the indent cylinderical surface along at least one arranged plane; the arranged plane isa plane perpendicular to the rotary axis of the rotating piece; the cross section of each of the first concave cavities is gradually enlarged from the bottom to an opening; the support seat is provided with a support seat cavity matched with the outer surface of the accommodating piece; and at least one support seat passage communicating with the first pore passages is arranged on the support seat. According to the dynamic pressure cylinder bearing, under the working state, a protruding column and the indent cylinderical surface are not contacted when the protruding column rotates, so that thedynamic rotating precision of a rotary shaft on a revolute pair can be improved by adopting the gas or liquid dynamic pressure technology.
Description
technical field [0001] The invention belongs to the field of machinery, and in particular relates to a dynamic pressure cylinder bearing. 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 hydrodynamic technology combined with a cylindrical structure 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) dynamic pressure technology, the dynamic pressure technology does not need to supply pressure oil, as long as the required wedge bushing is made in the concave cavity, and there is sufficient gas or liquid medium, After the cylinder rotates, it generates dynamic pressure and floats. The size of the dynamic pressure is related to the following conditions: the smaller the gap between the two cylinders, the larger the s...
Claims
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Application Information
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