CN202152853U

CN202152853U - Combined type shaft seal device

Info

Publication number: CN202152853U
Application number: CN2011202428491U
Authority: CN
Inventors: 何广
Original assignee: ZIGONG CITY JIULONG MACHINERY MANUFACTURE CO Ltd
Current assignee: Sichuan Jiulong seal manufacturing Co. Ltd.
Priority date: 2011-07-12
Filing date: 2011-07-12
Publication date: 2012-02-29
Anticipated expiration: 2021-07-12

Abstract

The utility model discloses a combined type shaft seal device, which comprises an outer sealing sleeve and an inner sealing sleeve, wherein the outer sealing sleeve and the inner sealing sleeve are mutually connected in an embedded mode and sealed through a seal ring A. The outer sealing sleeve is in transition fit with a bearing box, and the outer sealing sleeve and the bearing box are sealed through a seal ring B, the inner sealing sleeve is in transition fit with a bearing shaft, and the inner sealing sleeve and the bearing shaft are sealed through a seal ring C. The combined type shaft seal device adopts the outer sealing sleeve and the inner sealing sleeve which are matched with each other, and relative motion of the outer sealing sleeve and the inner sealing sleeve substitutes for relative motion of a traditional bearing shaft and a framework oil seal. The combined type shaft seal device greatly improves sealing effects, prolongs service life of a sealing element simultaneously, saves cost of production, reduces times of halt overhaul, shortens time of halt overhaul, guarantees continuous operation of production, and reduces labor intensity of overhaul simultaneously.

Description

A kind of built-up shaft seal apparatus

Technical field

The utility model relates to the mechanical sealing technology field, especially relates to a kind of built-up shaft seal apparatus.

Background technique

In the engineering goods position of bearings; Damage for the entering of the oil leak that prevents bearing and impurity and corrode bearing, need carry out encapsulation process, but the bearing outer position is owing to receive axially and the restriction of radial space size generally all can not be used mechanical seal in the bearing outside; Common processing method is in the bearing disposed outside outside framework oil seal to be arranged; Plays sealing and dustproof wait effect, and the sealing principle of outside framework oil seal is to lean on its lip limit to seal with magnitude of interference between the axle cylindrical that is cooperated, spool in running along its shaft axis rotation; And the outside framework oil seal transfixion; Therefore the cylindrical of the lip limit of outside framework oil seal and axle is in Frotteurism always in the course of the work, and long-term friction not only can cause the lip limit wearing and tearing of outside framework oil seal to cause seal failure, also can cause the wearing and tearing of axle.

The model utility content

The purpose of the utility model is to provide a kind of sealing effect better, the long-term built-up shaft seal apparatus that also can not cause wear damage to the axle at being sealed and matched position that uses.

In order to achieve the above object, a kind of built-up shaft seal apparatus of the utility model is realized through following technological scheme: a kind of built-up shaft seal apparatus comprises outer seal sleeve 1 and inner seal sleeve 2, wherein; Outer seal sleeve 1 embeds each other with inner seal sleeve 2 and joins, and through seal ring A3 sealing, described outer seal sleeve 1 and bearing support 4 transition fit; And through seal ring B5 sealing; Both can prevent the rotation of outer seal sleeve 1, the medium that lubricant oil in the salable again bearing and isolation bearing are outer, described inner seal sleeve 2 and bearing shaft 6 transition fit; And through seal ring C7 sealing; When bearing shaft 6 is rotated, drive inner seal sleeve 2 and rotate, both are static relatively, have avoided frictional loss.Outer seal sleeve 1 embeds each other with inner seal sleeve 2 and joins; When bearing shaft 6 was rotated, though outer seal sleeve 1 and inner seal sleeve 2 relative movement were intermittently less; But still need sealing through seal ring A3; Because the plastic behavior of seal ring, in the sealing deformation process wearing and tearing of seal ring minimum, improved sealing effect and working life greatly.

As preferably; Described seal ring A3, seal ring B5 and seal ring C7 all select " o " shape seal ring for use; The cross section is circle and the good toughness of rubber, and it fits tightly with each parts surface that is cooperated in the process that realizes sealing uniformly, realizes stable sealing.

As preferably; Described seal ring A3, seal ring B5 and seal ring C7 all select nitrile butadiene rubber material or fluorine rubber material for use; Nitrile butadiene rubber and fluorine rubber all have good oil resistance and corrosion resistance as material commonly used in the rubber seal, can satisfy the requirement of sealing.

As preferably, the body of described outer seal sleeve 1 and inner seal sleeve 2 all selects for use Ordinary Steel or stainless steel or copper product to process, and selects for use material different to process according to the medium that is sealed.

Compared with prior art, the beneficial effect of the utility model is: this device adopts outer seal sleeve and the inner seal sleeve that cooperatively interacts, and substitutes the traditional bearing shaft and the relative movement of outside framework oil seal with the relative movement that seals inside and outside cover; When improving sealing effect greatly; Prolong the working life of Sealing, both saved production cost, reduced the number of times and the time of shutting down maintenance again; Guarantee the continuous operation of production, reduced maintenance labor intensity simultaneously.

Description of drawings

The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is the utility model structural representation.

Mark among the figure: outer seal sleeve 1, inner seal sleeve 2, seal ring A3, bearing housing 4, seal ring B5, bearing shaft 6, seal ring C7.

Embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

For the purpose, technological scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in fig. 1, a kind of built-up shaft seal apparatus comprises outer seal sleeve 1 and inner seal sleeve 2, wherein; Outer seal sleeve 1 embeds each other with inner seal sleeve 2 and joins, and through seal ring A3 sealing, outer seal sleeve 1 and bearing support 4 transition fit in the assembly; And through seal ring B5 sealing, both can prevent the rotation of outer seal sleeve 1, the medium that lubricant oil in the salable again bearing and isolation bearing are outer; And inner seal sleeve 2 and bearing shaft 6 transition fit, and through seal ring C7 sealing.Seal ring A3 in this device, seal ring B5 and seal ring C7 can select " o " shape seal ring for use; Wherein " o " shape seal ring selects for use nitrile butadiene rubber material or fluorine rubber material perhaps with his plastic material; All have good oil resistance and corrosion resistance; Can satisfy the requirement of sealing, and the body of outer seal sleeve 1 and inner seal sleeve 2 can select Ordinary Steel or stainless steel or copper product to process, and selects for use material different to process according to the medium that is sealed for use.。

When bearing shaft 6 was rotated, because function of friction, bearing shaft 6 drove inner seal sleeve 2 and rotates, and both are static relatively; Thereby avoided mutual fretting wear, at this moment, joined because outer seal sleeve 1 embeds with inner seal sleeve 2 each other; When bearing shaft 6 was rotated, outer seal sleeve 1 was static with respect to bearing housing 4, inner seal sleeve 2 relatively and bearing shaft 6 static; Outer seal sleeve 1 and inner seal sleeve 2 relative movement, matching gap therebetween is less≤0.1mm is very little through the flow scale of construction in gap; In order to prevent the leakage of few partially liq mobile between the gap, between inside and outside stuffing box gland, seal, because the plastic behavior of seal ring with seal ring A3; Add to act on inside and outside stuffing box gland relative movement with it, in seal process the wearing and tearing of seal ring minimum, substitute the traditional outside framework oil seal and the relative movement of bearing shaft through relative movement with the inside and outside cover of sealing; When improving sealing effect greatly, the 3-4 of working life to the former skeleton oil sealing of prolongation Sealing had doubly both practiced thrift cost of production; Also reduce the time of shutting down maintenance, guaranteed the continuous operation of producing, reduced the labor intensity of maintenance.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.

Claims

1. a built-up shaft seal apparatus is characterized in that: comprise outer seal sleeve (1) and inner seal sleeve (2), wherein; Outer seal sleeve (1) embeds each other with inner seal sleeve (2) and joins; And through seal ring A (3) sealing, described outer seal sleeve (1) and bearing housing (4) transition fit, and through seal ring B (5) sealing; Described inner seal sleeve (2) and bearing shaft (6) transition fit, and through seal ring C (7) sealing.

2. a kind of built-up shaft seal apparatus according to claim 1 is characterized in that: described seal ring A (3), seal ring B (5) and seal ring C (7) all select " o " shape seal ring for use.

3. a kind of built-up shaft seal apparatus according to claim 2 is characterized in that: " o " shape seal ring that described seal ring A (3), seal ring B (5) and seal ring C (7) are selected for use is nitrile butadiene rubber material or fluorine rubber material.

4. a kind of built-up shaft seal apparatus according to claim 1 is characterized in that: the body of described outer seal sleeve (1) and inner seal sleeve (2) all selects for use Ordinary Steel or stainless steel or copper product to process.