SU1259714A2 - Device for securing impeller of radial turbomachine - Google Patents

Description

2. The device according to claim 1, about gl and - -reading

By the fact that the pins are

t

The invention relates to Jc turbomachine.

The purpose of the invention is to increase reliability by unloading pins from dynamic effects,

The drawing shows a device for fastening the impeller of a radial turbomachine, a longitudinal section ..

The device for fastening the impeller of the radial turbomachine on isala contains at least three pins 1, evenly placed around the circumference in the holes made in the disk 2 of the wheel 3 and the holes made in the shaft 4 parallel to the axis of the shaft, each pin in the form of eccentric with two trunnions. The device is provided with an annular collar 5 and a counterbore 6 arranged on the wheel 3 and the shaft 4, which are concentric with the shaft 4, the narzoknaya surface of the collar 5 is located in the bore 6 with the editor L. Pashkova Order 2032

: Compiled by R. Salkov Tehred O. Sopko. Corrector I. Muska

Circulation 426 Subscription

VNISh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

laid on a diameter smaller than the diameter of the collar.

The radial clearance is d and contacts the bore wall 6 in working mode. In addition, the pins 1 are located on the diameter J, smaller than the diameter of the collar 5; The magnitude of the radial clearance d is selected because of the condition of contacting the surface of the collar 5 with the wall 6 of the working 6,

As the frequency of rotation of shaft 4 increases, the wheel 3 expands in the radial direction and is centered. It is provided with pins 1 at a certain turn. When the nominal clearance mode is reached, the surface of the collar 5 and the wall of the bore 6 are in contact, thereby ensuring

A stiffer and more precise centering of the wheel 3 along the bore of the shaft 4 is observed. The external distribution of the coupling I of the shoulder 5 of the wheel 3 with the boring 6 of the shaft 4 in relation to the pins 1 helps to prevent foreign particles from under the pin studs 1.

Claims (1)

The device for mounting the impeller of a radial turbomachine on the shaft contains at least three pins - ¹ and 1, evenly spaced around the circumference in the holes made in the disk 2 of the wheel of the 3rd hole, made in the shaft 4 parallel to the axis of the shaft, and each pin 1 is made in in the form of an eccentric with two pins. The device is equipped with ring ²¹ collar 5 and reciprocal bore 6, arranged on the wheel 3 and shaft 4, respectively, arranged concentrically to the shaft 4, and the outer surface of the collar 5 is located in the bore 6 to form. ··. ·. 2. the radial clearance d and is in contact with the wall of the bore 6 in working mode. In addition, the pins 1 are located on a diameter smaller than the diameter of the shoulder 5; The value of the radial clearance d is selected from the condition of contacting the surface of the shoulder 5 with the wall b in operation. As the rotational speed of the shaft 4 increases, the wheel 3 expands in the radial direction and its centering is provided by the pins 1 at some of their turns. When the nominal clearance mode is reached, it is selected, the collar surface 5 and the wall of the bore 6 are in contact, thereby providing a stiffer and exact center; wheel 3 is aligned with the bore of the shaft 4. The external location of the interface between the collar 5 of the wheel 3 and the bore 6 of the shaft 4 in relation to the pins 1 helps to prevent foreign particles from falling under the pins of the pins 1.