SU1739109A1 - Aerodynamic support - Google Patents

Abstract

Use, in mechanical engineering, to simplify assembly technology and reduce the complexity of the operation of exhibiting working gaps in an aerodynamic support. SUMMARY OF THE INVENTION: The aerodynamic support comprises a fixed support element 7 and a movable support element 2 mounted on a shaft. The tool 4 shows the working gap mounted on the shaft with an emphasis on the movable support element. .f f-ly, 5 silt

Description

WITH

with

The invention relates to precise machine and instrument making and can be used in product designs with a rotor, a gimbal, a frame, and the like suspended from supports.

Known technical solutions, using as a bearing bearing. They are one of the following structures: 1) a system of supporting rotary bodies, balls or rollers installed in the respective guide surfaces of special parts; 2) a system of supporting bodies for rotating balls or rollers directly in contact with the shaft; 3) a support body system in which a shaft support hole is made, which responds in shape.

When setting the required clearance, a special technological operation is introduced in them, the performance of which requires experience and high qualifications of the performer. The noted feature is a significant drawback, since the remuneration of highly qualified performers indirectly increases the cost of the product.

The aerodynamic support of a hydraulic motor is known, taken as a prototype, comprising a fixed support element and a movable support element mounted on a shaft, as well as a means of exhibiting a working gap in the form of a sleeve mounted on a shaft.

The disadvantage of this support is that the actual adjustment of the gap is provided during assembly by pre-selecting the matching dimensions of the exhibition gap of the working gap (sleeve), the fixed support element of the shaft seats. For a multilink dimension chain, the selective assembly is not solved, so the selection of parts will be random and time consuming, not guaranteeing the required clearance accuracy.

VJ CO

Yu

o you

The aim of the invention is to increase the reliability and simplify the assembly technology.

This goal is achieved by the fact that in an aerodynamic support comprising a stationary support element and a movable support element mounted on a shaft, as well as a working clearance exhibition means mounted on the shaft with an emphasis on the movable support element, said means is made in the form of a package of piezoelectric rings. In addition, the movable support element and the package of piezoceramic rings can be attached to the shaft by means of adhesive bonding.

Fig. 1 schematically shows the proposed support in the final state after the clearance exhibition; figure 2 - node I in figure 1; FIG. 3 is a schematic of the connection means of the exhibition of the working gap to an external power source (not shown in FIG.); Fig. 4,5 shows the geometrical determination of the magnitude of the linear displacement of the movable support element. (It is assumed that a similar device is made in the right, not shown support).

On the shaft 1 there is a movable support element 2 and means 3 of the exhibition of the working gap, which is fixed after the exhibition of the working gap by means of adhesive bonding. The working gap exhibition means is made in the form of a package of piezoceramic rings with a typical connection to the power supply unit by the voltage Upit (Fig. 3) and consists of the body 4, the piezoceramic rings 5 and the electrodes 6, deposited, for example, by sputtering. The number of piezoceramic rings 5 in the tool 3 shows the working gap is determined by the ceramic material, the voltage value 1) pit and the magnitude of the expected movement D required to realize the working gap Z (Fig. 4). An external displacement measurement device (SPD) can be used to monitor the actual movement values.

The device works as follows.

In the initial state, the shaft 1 with the working gap exhibition means 3 pre-fixed on it is installed in the fixed support element 7 (according to the product design). Glue is applied to the shaft 1 at the attachment point and a movable support element 2 is installed on the glue line prior to contact with the tool 3 shows the working gap at point A (Fig. 2). It is supplied from an external power source with a voltage of 1) pit and means 3 of the exhibition

the working gap due to the implementation of the piezoelectric effect in the package (4, 5, 6) lengthens by the calculated value and due to the contact at point A shifts the movable support element 2 by the same distance. Thereafter

the voltage is removed 1) Pete, the tool 3 shows the working gap acquires an initial linear dimension, and the movable support element 2 relative to the fixed support element 7 remains with

set by the diametral working gap Z, i.e. the final state shown in Fig. 1 is reached. The stroke A of the means 3 of the working clearance exhibition is determined by design according to known

constructively the nominal sizes of the diameters of the movable 2, the fixed 7 supporting elements and the working gap in their interface, respectively Cu, Da, Oz, Z (Figures 4, 5):

,

ALI2-H2-M2- iMJS uzj U

Where

SI 2

D2 2

Z 2

The invention is most effective in support structures with minimal guaranteed axial and radial clearances, set with high precision, where a reduction in the laboriousness of the exhibition of these working clearances is required.

Claims (2)

1. Aerodynamic support comprising a fixed support element and a movable support element mounted on a shaft, as well as a working clearance exhibition means mounted on a shaft with an emphasis on a movable support element, which, in order to increase reliability and simplify assembly technology, means the exhibition of the working gap is made in the form of a package of piezoceramic rings. 2. A support according to claim 1, characterized in that the movable support element and the package of piezoceramic rings are fixed to the shaft by means of adhesive bonding. yun Adhesive Compound z / 2 (rig 2 faeeSoe connection Riga.1  Tffm 0  vUnum -4 B 77l U7 / L Rig.Z Jb RG4 one/ L L Pus 5