CN214837857U

CN214837857U - Variable throttling static pressure gas bearing with parallel gas supply mode

Info

Publication number: CN214837857U
Application number: CN202120176654.5U
Authority: CN
Inventors: 赵晓龙; 张君安; 刘波; 董皓; 李博; 王亚娟
Original assignee: Xian Technological University
Current assignee: Xian Technological University
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-23
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to a variable throttle static pressure gas bearing of parallelly connected air feed mode. The static pressure gas bearing aims at solving the problems of low bearing capacity, poor rigidity, low stability and the like of the traditional static pressure gas bearing. The technical scheme adopted by the utility model comprises a bearing body, wherein an inner air chamber is arranged in the bearing body, the inner air chamber is communicated with the outside air through an air inlet nozzle, a plurality of variable throttling air chambers with staggered positions are uniformly distributed in the bearing surface array of the bearing body, the center of the lower part of each variable throttling air chamber is communicated with a throttleer, the throttleer is communicated with the inner air chamber, and the diameter of the throttleer is 0.01mm-0.2 mm; the thickness is 0.2-0.5 mm.

Description

Variable throttling static pressure gas bearing with parallel gas supply mode

Technical Field

The utility model relates to a variable throttle static pressure gas bearing of parallelly connected air feed mode.

Background

Because of the characteristics of no friction and no pollution, the hydrostatic gas bearing is often used as a key core element to be applied to precision and ultra-precision test equipment. However, the static pressure gas bearing has low bearing capacity and poor stability due to the objective problems of small viscosity and strong compressibility of the gas.

In the prior art, a hole throttling plunger is mounted on a static pressure gas bearing body to realize a gas throttling effect and increase the bearing capacity and stability. Because the inherent hole throttler needs to be installed after the bearing body is processed, the bearing capacity and the stability of the bearing are greatly weakened by the uniformity, the flatness and the position deviation when a plurality of inherent throttlers are installed; meanwhile, in order to supply air to each inherent throttler, a plurality of linear air passages are required to be arranged in the bearing to realize the intercommunication of the throttlers, the mass balance of the bearing is seriously damaged by the mode, and unbalance loading is easy to occur in the bearing process, so that the conditions of uneven pressure of a bearing air film, low bearing capacity and poor stability are caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a solve that traditional static pressure gas bearing capacity is low, rigidity is poor and stability hangs down the scheduling problem, provide the variable throttle static pressure gas bearing of parallelly connected air feed mode.

For solving the problems existing in the prior art, the technical scheme of the utility model is that: the dense array variable throttling static pressure gas bearing adopting the single gas supply mode comprises a bearing body and is characterized in that: the bearing is characterized in that an inner air chamber is arranged in the bearing body and is communicated with the outside air through an air inlet nozzle, a plurality of variable throttling air chambers with staggered positions are uniformly distributed in the array of the bearing surface of the bearing body, and a throttling device is communicated with the center of the lower part of each variable throttling air chamber and is communicated with the inner air chamber.

Furthermore, the diameter of the restrictor is 0.01mm-0.2 mm; the thickness is 0.2-0.5 mm.

Compared with the prior art, the utility model has the advantages as follows:

1. the utility model adopts the design of the inner air chamber in the structure, and does not need to process a linear air passage independently, thereby realizing the dense array of a plurality of throttlers on the bearing carrying surface, and the mode breaks through the technical bottlenecks of linear symmetrical layout of the throttlers and difficult processing of complex gas circuit shapes; meanwhile, the cross section shape of the variable throttling air chamber in the throttling device area changes along with the load mass, so that the throttling effect of the throttling device can be effectively improved;

2. the utility model adopts the design scheme that the inner air chamber is connected with a plurality of throttlers in parallel to realize single air supply, effectively overcomes the adverse effects of complicated shape and difficult processing of the inner air passages of a large number of throttlers, can ensure the application requirements of uniform weight and equal air supply quantity of the bearing, and avoids adverse factors such as unbalance loading and the like caused by multipath air supply;

3. the utility model adopts the design mode of the dense array variable throttling, increases the number of the throttlers of the bearing, is uniformly arranged, can form uniform bearing pressure on the bearing surface, is matched with the dynamic deformation of the section of the variable throttling air chamber, adjusts and compensates the throttling effect of the throttler, and cooperatively promotes the bearing capacity and stability of the bearing;

description of the drawings:

fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a top cross-sectional view of the air chamber of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 2I;

FIG. 5 is a circular configuration of a variable throttle hydrostatic gas bearing with parallel gas supply;

FIG. 6 is a rectangular configuration scheme of a variable throttle hydrostatic gas bearing with parallel gas supply;

in the figure, 1 is a bearing body, 2 is an air inlet nozzle, 3 is an inner air chamber, 4 is a throttling device, and 5 is a variable throttling air chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A variable throttling static pressure gas bearing adopting a parallel gas supply mode is disclosed, as shown in figures 1-4, and comprises a static pressure gas bearing body 1, wherein a gas inlet nozzle 2 is designed on the static pressure gas bearing body 1, the gas inlet nozzle 2 is communicated with an inner gas chamber 3, a plurality of variable throttling gas chambers 5 with staggered positions are uniformly distributed on a bearing surface array of the bearing body 1, a throttler 4 is arranged and communicated at the geometric center or the gravity center of each variable throttling gas chamber 5, and the throttler 4 is communicated with the inner gas chamber 3;

the diameter of the restrictor is 0.01mm-0.2 mm; the thickness is 0.2-0.5 mm.

The structure of the static pressure gas bearing body 1 is round as shown in fig. 5, or rectangular as shown in fig. 6;

the variable orifice air chamber is rectangular in shape as shown in fig. 6, or fan-shaped as shown in fig. 5.

The gas flow path of the structure firstly enters the air inlet nozzle 2, then enters the inner air chamber 3, then flows into the variable throttling air chamber 5 through the throttling device 4, and finally flows out to the external environment.

The static pressure gas bearing body structure is provided with only one air inlet nozzle 2, and throttlers 4 with different positions independent are connected in parallel through an inner air chamber 3.

When the throttle 4 is arranged in the bearing body in a working state, the position is subjected to deflection deformation, and the section shape of the variable throttle air chamber is dynamically adjusted; the throttler 4 is positioned at the geometric center or the gravity center of the section of the variable throttling air chamber 5, and the diameter of the throttler 4 is 0.01mm-0.2 mm; in the dense array mode, the variable throttling air chambers 5 of two adjacent areas are arranged in a staggered manner, so that the mutual interference of the outlet gases of the adjacent throttleers in the dense array is avoided;

the utility model discloses the variable throttle static pressure gas bearing structure of dense array of single air feed mode is not limited to circular and rectangle, and its variable throttle air chamber shape is not limited to rectangle and fan-shaped.

The above is only the preferred embodiment of the present invention, and is not used to limit the protection scope of the present invention, it should be noted that, without departing from the principles of the present invention, the ordinary skilled person in the art can perform a plurality of improvements and decorations thereon, all should be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a variable throttle static pressure gas bearing of parallelly connected air feed mode, includes bearing body (1), its characterized in that: the bearing comprises a bearing body (1), wherein an inner air chamber (3) is arranged in the bearing body (1), the inner air chamber (3) is communicated with the outside air through an air inlet nozzle (2), a plurality of variable throttling air chambers (5) with staggered positions are uniformly distributed in the array of the bearing surface of the bearing body (1), a throttling device (4) is communicated with the center of the lower portion of each variable throttling air chamber (5), and the throttling device (4) is communicated with the inner air chamber (3).

2. The variable-throttle hydrostatic gas bearing with parallel gas supply according to claim 1, wherein: the diameter of the throttler is 0.01mm-0.2 mm; the thickness is 0.2-0.5 mm.