CN2240634Y

CN2240634Y - Ceramic bush bearing of centrifugical pump

Info

Publication number: CN2240634Y
Application number: CN 95220632
Authority: CN
Inventors: 蔡得名; 李建平; 何国明
Original assignee: MACHINERY INST GENERAL MACHINERY DAQING PETROLEUM ADMINISTRATION
Current assignee: MACHINERY INST GENERAL MACHINERY DAQING PETROLEUM ADMINISTRATION
Priority date: 1995-08-22
Filing date: 1995-08-22
Publication date: 1996-11-20
Anticipated expiration: 2005-08-22

Abstract

The utility model relates to a ceramic sliding bearing which is suitable for a pump shaft support of petroleum and chemic industry and an oil field centrifugal pump. The ceramic sliding bearing which overcomes the defect of the original sliding bearing uses special material ceramic Zr O <2> and Ac <2> O <3> as friction pairs and adopts leakage of a balance device of the centrifugal pump and the heat generated from the work of a cooling bearing. The realization of the bearing ensures that the P. V value limit of the sliding bearing is increased by a plurality of times, greatly improves the reliability and the service life and widens the using application of the sliding bearing. The ceramic sliding bearing is not only used in the medium of the petroleum and the petroleum chemic industry, but also used in the medium including sand, sewage and acid-alkalinity.

Description

The centrifugal pump ceramic slide bearing

The utility model is used for petrochemical industry and oil field centrifugal pump, supports as pump bearing.

Conventional sliding bearing is to be formed by Babbitt, Cuprum alloy, aluminum alloy, composite material manufacturing mostly, and wherein the tinbase casting alloy accounts for 57%, and aluminium base casting alloy accounts for 25%.Though they all have good wear resistance, fatigue resistance, seizure resistance, embedding Tibetan property because the hardness of these materials is lower, all needs to be furnished with lubricated and sink, and very high to the purity requirement of lubricator, so limited using scope greatly.

We had used composite material oil-free lubrication sliding bearing, have adopted built-in structure directly to be immersed in the fed sheet of a media on centrifugal pump in 1986, had not only simplified pump structure but also solved sealing problem.Though the antifriction characteristic of composite material is fine because abrasive wear resistance is relatively poor, so in containing the more medium of sand or other solid particle the life-span very low.More than the result of Fen Xiing is the same with a large amount of commerical test conclusions, illustrates that the Applicable scope of these sliding bearings has significant limitation, and especially inapplicable oil field sand containing crude oil is carried.

For solving the problem of above-mentioned existence, can on structure and material, find a kind of desirable sliding bearing,, satisfy the characteristic that the oil field medium uses to widen its using scope, improve its working life, the utility model provides the ceramic slide bearing of a kind of new structure and new material.

This ceramic slide bearing is to be friction pair with the special ceramic material, designs the structure that adapts to ceramic characteristics, makes its advantage that makes full use of pottery, avoids its unfavorable factor, reaches the new design of oil field medium application target.

Special cermacis is with artificial compound ZrO ₂And Ae ₂O ₃Make for raw material, be characterized in the hardness height, compressive strength is big, and is high temperature resistant, wear-resistant, anti-oxidant and corrosion resistance and good etc., but matter is crisp, lacks ductility, and stressed back is difficult for producing plastic deformation, is unable to undergo to beat collision, curved shearing, the chilling, suddenly hot relatively poor of drawing.Based on these characteristics, structurally bearing spider [1] design there are a plurality of flow channels, because bearing shell [2] is a special ceramic material, so the fiting property of selecting to be fit to ceramic characteristics is placed in one, so not only can reduce the lifting surface area of ceramic bearing shell, can utilize the leakage of Equilibrator to come the heat of cooling bearing work generation again, avoid the influence of rapid heat cycle stupalith.

Elaborate below in conjunction with accompanying drawing.

Accompanying drawing 1 is the structural representation and the fundamental diagram of this ceramic slide bearing.It mainly is made up of bearing spider [1], bearing shell [2], ceramic coated axle journal [3].Bearing spider [1] is placed in the pump chamber septal ostium, and its end face is screwed, and suitable interference fit is made in outer neck of bearing shell [2] and bearing spider [1] hole.Ceramic coated axle journal [3] is that a matrix is the outer ceramic coated spacer of neck of steel, and endoporus is done to cooperate to pack into pump shaft [4], and the end is fixed on the axle with interstage sleeve [6] and nut [5].Right when the normal operation of centrifugal pump, form pressure P by the Equilibrator leakage ₂, in pressure P ₂Under the effect, medium is by P ₁The chamber flow to P through the flow channels of bearing spider [1] ₁The entrance point of centrifugal pump is got back in the chamber.Since constantly flowing of medium, thus the heat that bearing working produces cooled off, also lubricated bearing simultaneously.For bearing can be used in containing the medium of solid particle, selected pottery as friction pair material, utilize its these good characteristics of wear-resistant grain abrasiveness, satisfied the characteristic that the oil field medium uses, thus the reliability and the working life of having improved pump.

Fig. 2 is the structural drawing of bearing spider [1], is processed with a plurality of flow channels on its body, is used for the heat that cooling bearing work produces, and bearing is worked under a relative stationary temperature.

Ceramic slide bearing and the contrast of original technology have following advantage:

1. the utlity model has all functions of other material sliding bearing;

2. under the identical condition of work, the PV value limit of the present utility model exceeds other and slides The dynamic bearing several times, reliability and service life all improve a lot.

3. self-lubrication, cooling has reduced investment;

4. the utility model not only has very high wear-resistant grain wearing and tearing ability, also has antiacid, alkali or other corrosivity ability.Be particularly useful for the application among sand containing crude oil, oilfield sewage and the petrochemical industry medium.

Claims

1. a centrifugal pump ceramic slide bearing mainly is made up of bearing spider [1], bearing shell [2], ceramic coated axle journal [3], it is characterized in that: bearing shell [2] places bearing spider [1] to support ceramic coated axle journal [3], and places and reach the work purpose in the pump chamber.

2. centrifugal pump ceramic slide bearing according to claim 1 is characterized in that: bearing shell [2] is made pottery to support by special type and is made, and pottery [3] is ceramic coated on steel base.

3. centrifugal pump ceramic slide bearing according to claim 1 is characterized in that: bearing spider [1] is shaped on a plurality of flow channels.