SU943437A1

SU943437A1 - Turbocompressor bearing assembly

Info

Publication number: SU943437A1
Application number: SU803218218A
Authority: SU
Inventors: Иван Петрович Богодяж
Original assignee: Челябинский Филиал Государственного Союзного Научно-Исследовательского Тракторного Института "Нати"
Priority date: 1980-12-11
Filing date: 1980-12-11
Publication date: 1982-07-15

Description

(54) ПОДШИПНИКОВЫЙ УЗЕЛ ТУРБОКОМПРЕССОРА(54) BEARING TURBO COMPRESSOR ASSEMBLY

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Изобретение относитс к турбостроению и может быть применено в подшипниковых узлах турбокомпрессоров.The invention relates to turbine construction and can be applied in bearing assemblies of turbo compressors.

Известен подшипниковый узел турбокомпрессора , содержаший корпус с установленной в нем втулкой, охватывающей вал и имеющей с внутренней стороны продольные канавки и расположенную между ними маслораспределительную цилиндрическую полость, а со стороны торцов - радиальные выемки, сообщенные с маслосливной полостью и через продольные канавки - с маслораспределительной полостью 1.A turbocharger bearing unit is known, containing a housing with a sleeve installed in it, covering the shaft and having longitudinal grooves on the inner side and a cylindrical oil-dispensing cavity located between them, and radial grooves communicating with the oil drain cavity and through the longitudinal grooves with the oil-distributing cavity from the ends one.

Недостатком такого узла вл етс низка надежность при работе в режиме пуска турбокомпрессора, когда система смазки еще не заполнена маслом.The disadvantage of this unit is low reliability when operating in the turbocharger start mode, when the lubrication system is not yet filled with oil.

Цель изобретени - повышеиие надежности подшипникового узла.The purpose of the invention is to improve the reliability of the bearing assembly.

. Указанна цель достигаетс тем, что во втулке выполнены каналы, дополнительно сообщающие канавки и выемки с нижней частью маслораспределительной полости.. This goal is achieved by the fact that channels are provided in the bushing, additionally communicating grooves and recesses with the lower part of the oil distribution cavity.

Ось маслораспределительной полости расположена эксцентрично относительно оси вала с образованием контактной зоны между последним и верхней частью втулки , а плоскость, проход ща через эти оси, расположена относительно вертикальной плоскости под углом, не -превышающим 90°, и смещена против вращени вала.The axis of the oil distribution cavity is located eccentrically relative to the axis of the shaft with the formation of a contact zone between the last and upper parts of the sleeve, and the plane passing through these axes is located relative to the vertical plane at an angle not exceeding 90 ° and offset against the rotation of the shaft.

На фиг. 1 изображен подшипниковыйFIG. 1 shows the bearing

Claims

5 node turbocharger, longitudinal section; in fig. 2 - the same cross section. The assembly includes a housing 1 with a sleeve 2 installed therein, which encloses the shaft 3. On the inside, the sleeve 2 has longitudinal jj grooves 4, between which there is an oil distribution cylindrical cavity 5. On the end side, the sleeve has radial grooves 6 communicated with the oil drain cavity 7 and through the longitudinal grooves 4 - from the oil distribution chamber of the distributing cavity 5. In the sleeve 2, channels 8 are made, additionally communicating the grooves 4 and notches 6 with the lower part of the oil distribution cavity 5. Axis 9 of the oil distribution cavity is located eccentric from 1 axis of the shaft 10 with the formation of the contact zone 11 between the shaft 3 and the upper part of the sleeve. 2. The plane BB, passing through the axis 10 of the shaft 3 and the axis 9 of the oil distribution cavity 5, is located relative to the vertical plane B-B at an angle сС not exceeding 90 ° and displaced against the rotation of the shaft 3. Podschpnikovy node works as follows. When you start the turbocharger in the radial grooves 6, a vacuum occurs, under the action of which the reserved oil from the previous run in the lower part of the oil distribution cavity 5 through channels 8 enters the lubricant into the lower longitudinal grooves 4 and the radial grooves 6. In addition, the rotation of the shaft 3 in the oil distribution valve cavity 5 contributes to the suction of air into the oil distribution cavity. This produces an oil-mash-mix, which is injected to the friction surfaces of the substructure. So the bearing unit works with limited lubrication in the first moments after start up until the oil pressure in the lubrication system of the turbocharger is not excessive. The design of the bearing assembly makes it possible to increase the reliability and service life of the turbocharger. Claim 1. Bearing assembly of a turbocharger, comprising a housing with a sleeve installed in it, spanning the shaft and having longitudinal grooves on the inner side and an oil distribution ring cavity located between them, and radial grooves communicating with the oil drain cavity and the longitudinal grooves from the ends with an oil distribution cavity, characterized in that, in order to increase reliability, channels are made in the sleeve, additionally communicating grooves and recesses with the lower part of the oil distribution lutel cavity.

2. The assembly according to claim 1, characterized in that the axis of the oil distribution cavity is located eccentrically relative to the shaft axis to form a contact zone between the last and top part of the sleeve, and the PLANE passing through these axes is located relative to the vertical plane at an angle not exceeding 90 ° and offset against shaft rotation. Sources of information taken into account in the examination 1. Simeon A. E. Turbopodduv high-speed diesel engines. M., “Mechanical Engineering, 1976, p. 173.

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