CN2249325Y

CN2249325Y - Graphite magnetic sealing device for centrifugal pump shaft

Info

Publication number: CN2249325Y
Application number: CN 94225265
Authority: CN
Inventors: 张洪良
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-03
Filing date: 1994-02-03
Publication date: 1997-03-12
Anticipated expiration: 2004-02-03

Abstract

The utility model is used for sealing a centrifugal pump shaft. A first seal area A is composed of a framework oil seal E, a graphite ring 7, and machine oil 3; a second seal area B is composed of seal rubber rings 4, 6, a graphite ring 9, a steel magnetic body 8, iron powder barium-base grease 5, and an anti-rotating screw 10; a third seal area C is composed of the machine oil 3 and the framework oil seal E. The utility model is characterized in that all the elements of the second seal area are fixed on a rotating shaft, and are in a static state relative to the rotating shaft; a plurality of iron powder barium-base grease with good sealing property is arranged in the steel magnetic body. The service life of the rotating shaft is increased; graphite machine oil is lubricated in the seal rubber rings to form seal which overcomes the defects that the rotating elements arranged in the sealing device are easy to fray and the cost of sealing a magnetic fluid is high.

Description

Centrifugal pump shaft graphite magnetic seal device

The utility model is to be used for the centrifugal pump shaft seal arrangement, and how the most frequently used kind is two kinds for centrifugal pump sealing; 1, packing box seal, this kind sealing cost is low, poor sealing performance.2, mechanical seal, good seal performance, but technical requirements height, cost is expensive, and model utility 892197765 seal arrangements are used for magnetic seal on centrifugal pump and walked out new road, using effect is fine at normal temperatures, magnetic powder particle stripping when temperature raises in the Ba-grease can be accelerated the wearing and tearing of outside framework oil seal to axle, this sealing is used be restricted.

The purpose of this utility model provides a kind of magnetic seal performance that has, and can not make the particulate matter stripping in the magnetic seal again and accelerates the wearing and tearing of outside framework oil seal to axle, a kind of new centrifugal pump shaft graphite magnetic seal device that is used for.

The concrete practice of the present utility model: between two outside framework oil seals, when adding machine oil, add the graphite circle again one, make oil sealing and axle increase lubricity.The magnetic seal parts change relative static conditions with axle into from relatively rotating, and it is very little to wear and tear.Axle adds the relative standstill seal cushion rubber of twice with the interior two ends of magnetic seal body.Lubricating grease endoparticle thing is enclosed in axle and the magnetic entirely.Can not stripping, add one the graphite circle in the twice rotary seal cushion rubber, use machine oil than single, there is raising in the rotating component life-span, and front two practices make chamber inner engine oil assurance purity.Back road outside framework oil seal need not add the graphite circle, and sealing is also fine.The whole practices of this seal arrangement that Here it is.

The concrete structure following examples and the accompanying drawing thereof of model utility provide:

Accompanying drawing is a sectional view of the present utility model

This seal arrangement divides three seal areas, the first seal area , second sealing

The 3rd sealing .1, is impeller 2, the pump housing

The first seal area  is just being assembled by two one anti-one of outside framework oil seal E, adding between the oil sealing wearing and tearing under the lubricating condition of machine oil 3 graphite circles 7 of 7 11 on graphite circle very little, the first seal area  of Gou Chenging can play good seal action, second seal area thus

Steel magnetizer 8, add and handle through magnetization man-hour, make body have magnetic, with anti-turn screw 10, be fixed on the axle, add the Ba-grease 5 that has iron powder between axle 11 and the body 8 in the groove, prevent the stripping of lubricating grease internal particle thing, two ends add 4 two on sealer circle in body 8 and axle 11, just constituted to have the magnetic seal effect, and in particulate matter is enclosed in entirely.The Ba-grease 5 of body 8 inner band iron powders under the magnetic force, can play good seal action in very little gap.(1) body 8 total events are in relative static conditions with axle 11.(2) the sealed cushion rubber 4 of Ba-grease particulate matter is sealed entirely.Here it is with 89217765 sealing dresses different important 2 points.O-ring seal 6 on the steel magnetizer 8 is pivoting friction spares, for improving the life-span, adds machine oil 3 in two circles and adds graphite circle 9 simultaneously, can play lubrication.This practice has replaced cost very high mechanical sealing linkage ring, stationary ring with O-ring seal, graphite circle.The 3rd seal area , E constitutes by outside framework oil seal, and it has not only sealed pure machine oil 3, guarantee the second seal area proper functioning, and oneself also constitutes the 3rd seal area separately.

From above structure knot, just constituted and had mechanical seal, magnetic seal, the seal arrangement of sealed characteristic with very usual Sealing such as outside framework oil seal, O-ring seal, lubricating grease, machine oil, graphite circle and material.This model utility cost simple in structure is low, can be used for the existing mechanical seal of using, the centrifugal pump shaft sealing of packing box seal.

Claims

1, centrifugal pump shaft graphite magnetic seal device, it is characterized in that, be by two one anti-one of outside framework oil seal E just assembling, interior organic oil 3, add graphite circle 7 between axle 11 and the outside framework oil seal E and constitute the first seal area , O-ring seal 4,6, graphite circle 9, steel magnetizer 8, iron powder Ba-grease 5, anti-turn screw 10, formation has the relative second static seal area with rotating shaft of the close characteristics of magnetic

, machine oil 3, outside framework oil seal E constitute the 3rd seal area .

2, according to the described seal arrangement of claim 1: the first seal area A adds graphite circle 7 between one anti-one outside framework oil seal E that is just assembling and axle 11, and machine oil 3 constitutes the unique seal district of containing graphite in the machine oil.

3, according to the described seal arrangement of claim 1: it is characterized in that: second seal area Iron powder Ba-greases 5 form multiple tracks magnetic seal grease collars in the steel magnetizer 8, are sealed by close cushion rubber 6, make the particulate matter can not stripping.