RU173343U1 - CONNECTING THE TURNING AND COVERED PARTS WITH TENSION - Google Patents

Abstract

The utility model relates to mechanical engineering, namely to the joints of female and male parts and can be used in devices for their connection along the seating surfaces with interference or small gaps. In the hole 1 with a diameter D of the female part 2 (hereinafter the female component is referred to as disk 2) longitudinal grooves 3 in the form of sections of the surface of revolution 4, for example, a cylindrical surface 5 with a radius R, forming longitudinal protrusions 6. In the covered part 7 (hereinafter referred to as the covered part is called shaft 7) protrusions 8 with an outer diameter D, along which both parts are installed with an interference fit. Moreover, on the shaft, the protrusions 8 are formed by flats 9 in the form of planes 10 made on both sides relative to each protrusion 8. When assembling the joint at the initial stage, the disk is put on the shaft, pre-installing them so that the protrusions of the disk are opposite the flats of the shaft and move the disk along the shaft before the disk occupies the desired position, and then, applying torque to the disk and shaft (which requires flats on the shaft), rotate the disk until the tips of the projections 6 of the sleeve 2 of the disk and the projections of the shaft 8 are combined. As a result, a connection with The use of grooves in the disk in the form of sections of surfaces of revolution will make it possible, in comparison with the known technical solution, to easily make protrusions in the disk: a) on milling machines; b) on grinding machines; c) manually using an abrasive wheel and pneumatic drill. it will make it easy to make protrusions on the shaft: a) on milling machines; b) on grinding machines; c) manually using a file or using an abrasive wheel and pneumatic drill. There is no need to make special chamfers - their role is played by simple shapes rhnosti grooves and lysok.Ispolzovanie utility model improves manufacturability compound of the male and female parts with an interference fit. 2 ill.

Description

The inventive utility model relates to mechanical engineering, namely to the joints of female and male parts and can be used in devices for their connection on the landing surfaces with interference or small gaps.

A device for connecting a turbine disk with a shaft, comprising a shaft, a sleeve, mounted in a disk on pins, pressed onto a shaft [V. Tyutyunov Lovineky S.I. Aircraft engines: M., 1964, p. 195].

The disadvantages of the known device are its structural complexity and technological complexity in the manufacture and assembly, due to the need to press the sleeve into the disk, and then the sleeve together with the disk on the shaft.

It is also known to connect the female and male parts to cylindrical surfaces, comprising a shaft and a sleeve on which profiled elements, lead-in bevels and girdles are made, the shaft diameter being made larger than the sleeve diameter [P. Orlov Fundamentals of design, M., 1968, p. 452, fig. 349].

The disadvantages of this known device are due to the complexity of installation and dismantling, the need to use sophisticated equipment and devices to prevent biting and skewing and, consequently, damage to the connected parts; the difficulty and inability to press parts into two zones of the same diameter, which, if there are more than two female parts, increases the radial dimensions of the device; limited scope, since the pressing is not applicable when the male or female part has through cutouts extending to the end face, and also because of the need to make on, and one of the parts, flat surfaces to support the puller on them.

As a prototype, a well-known connection of female and male parts with interference fit, comprising profiled hard-fitting elements on the mating surfaces of these parts, in which the profiled elements are made in the form of protrusions with chamfers formed by longitudinal grooves, the width of the protrusions of both parts being less than the width of the grooves, and the specified the details are connected with the apices of the protrusions with an interference fit [USSR author's certificate No. 665128, cl. F16B 4/00, publ. 05/30/79, bull. No. 20].

The known design allows to simplify the installation and dismantling of the covered part when pressing several covering parts along the centering belts with the same diameter.

A disadvantage of the known compound is the low manufacturability due to the shape of the rectangular cross section of the groove and the need to make the same bevels on the edges of the protrusions in the covered part, which requires control of the size of the bevels with deburring. At the same time, these chamfers and burrs affect the amount of required torque for the relative rotation of the connected parts when they are assembled with an interference fit.

The technical task of the claimed utility model is to increase the manufacturability of manufacturing the joints of female and male parts with interference.

The problem is solved in that in the connection of the female and male parts with an interference fit that contains longitudinal protrusions in the hole of the female component, mated vertices with longitudinal protrusions on the surface of the male component and longitudinal grooves located between the protrusions in the female component, according to the utility model, each groove in the female part is made in the form of a surface of revolution with a radius smaller than the radius of the circle along the vertices of the protrusions of both parts.

The utility model is illustrated by drawings, in which a cross-sectional view of the connection of female and male parts (a shaft with a disk sleeve) with interference is shown: FIG. 1 - in position to tighten the female and male parts; FIG. 2 - in position after tightening. The list of positions and designations in the drawings:

1 - hole in the enclosing part (disc sleeve);

2 - disk;

3 - longitudinal groove;

4 - plot of the surface of rotation;

5 - a cylindrical surface;

6 - longitudinal protrusion;

7 - covered part (shaft);

8 - longitudinal protrusion;

9 - flats shaft;

10 - a flat surface of the flats of the shaft;

D is the diameter of the hole in the sleeve of the disk;

R is the radius of the surface of rotation;

H is the width of the groove;

h is the width of the longitudinal protrusion;

B is the width of the flat.

In the hole 1 with a diameter D of the female part 2 (hereinafter referred to as the disk 2) longitudinal grooves 3 are made in the form of sections of the surface of revolution 4, for example, a cylindrical surface 5 with a radius R, forming longitudinal projections 6.

In the male part 7 (hereinafter referred to as the male part is referred to as the shaft 7), protrusions 8 are made with an outer diameter D, along which both parts are installed with an interference fit. Moreover, on the shaft, the protrusions 8 are formed by flats 9 in the form of planes 10 made on both sides relative to each protrusion 8.

When assembling the joint at the initial stage, the disk is put on the shaft, pre-installing them so that the protrusions of the disk are located opposite the flats of the shaft and move the disk along the shaft until the disk occupies the desired position, and then, applying torque to the disk and shaft (which requires flats on shaft), rotate the disk until the tops of the protrusions 6 of the sleeve 2 of the disk and the protrusions of the shaft 8 are aligned. As a result, a tight connection is formed.

The use of grooves in the disk in the form of sections of surfaces of revolution will allow, in comparison with the known technical solution, it is easy to produce protrusions in the disk:

a) on milling machines;

b) on grinding machines;

c) manually using an abrasive wheel and pneumatic drill.

The use of a shaft with flats makes it easy to make protrusions on the shaft:

a) on milling machines;

b) on grinding machines;

c) manually with a file or using an abrasive wheel and pneumatic drill.

At the same time, there is no need to make special chamfers - their role is played by the surface of grooves and flats that are simple in shape.

The use of a utility model allows to increase the manufacturability of manufacturing the connection of the female and male parts with interference.

Claims (1)

The connection of the female and male parts with an interference fit, comprising longitudinal protrusions mating at the vertices with each other in the opening of the female part, longitudinal projections on the surface of the male part and longitudinal grooves located between the protrusions in the female part, characterized in that each groove in the female part is made in the form surfaces of revolution with a radius smaller than the radius of the circle along the vertices of the protrusions of both parts.

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