CN109973417A

CN109973417A - A kind of novel bearing seal protector

Info

Publication number: CN109973417A
Application number: CN201711500954.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Gong Zhendong
Current assignee: Gong Zhendong
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2019-07-05

Abstract

Up to the present the dust pan of additional tin bronze, cast iron is sealed in all pump bearing box two sides end caps for interdigitated electrode structure, radial clearance is larger, pump works in the case of a shock to be caused to rub between pump shaft and dust pan, make dust pan Internal Hole Deformation, lubricant mist is caused to be revealed, harmful atmosphere in environment can be entered in the pump housing under the centrifugation negative pressure of pump by gap, pollute corrosion to lubricating oil in pumping and bearing, reduce the service life of pump, mist of oil leakage contribution environmental protection.The present invention: a kind of novel bearing seal protector uses polytetrafluoro material to add graphite, copper, rare earth for matrix, has good strength, anti-attrition, corrosion-resistant, explosion-proof and anti-flammability.Protector is fixedly connected with the end cap of pump, and annular groove in inner cavity and backflash stop the leakage of mist of oil, it and pump shaft gap value very little; do not generate convection current; harmful atmosphere in environment not can enter the bearing housing of pump, protect lubricating oil and bearing, improve the service life of pump and environmental protection.

Description

A kind of novel bearing seal protector

Technical field:

The present invention relates to a kind of inclusion seals of pump

Technical background:

Centrifugal pump bearing cabinet structures (as shown in the figure) all at present, both sides sealing structure are that interdigitated electrode structure seals add-back Oilhole, outside add dust pan, and material generally selects tin bronze, cast iron.It is 0.5mm in the radial clearance design of this sealing, but It is much larger than this size in actual use, lubricant mist can leak out under biggish gap, and the scene of many years is real Even if trampling proves to still suffer from slight mist of oil leakage in the case where the very little of this sealing structure gap, in actual moving process, Pump works in the case where long-term vibration will cause the loosening of dust pan, cause to generate friction between pump shaft and dust pan, this Friction can also cause to overheat, and make dust pan Internal Hole Deformation, further increase radial clearance, produce in biggish radial clearance space The convection current of raw inside and outside atmosphere and under the action of pressure difference, causes lubricating oil (mist) to reveal, meanwhile, the various atmosphere in ambient enviroment Including humid air, dust, the media such as acid air are inhaled under the action of centrifugation negative pressure by the gap of sealing when pumping operating Enter in the pump housing, lubricating oil in pumping and bearing are polluted and corrodes and runs out bearing, these all seriously affect the use longevity of pump The long-term leakage of life, mist of oil will also result in very big pressure to environmental protection！

Summary of the invention: in order to overcome the above problem, the present invention provides a kind of bearing seal protector, using polytetrafluoro material For matrix, graphite is added, copper and rare earth element form a kind of composite material, and are fabricated to the multiple annular grooves of inner cavity band and backflash Pump bearing seal protector.

The technical solution adopted in the present invention: novel bearing seal protector, which uses, has some strength, toughness and corrosion resistant Graphite is added as bulk material in the polytetrafluoro of corrosion, and copper and rare earth element form a kind of composite material, and this composite material is good Eager to do well in everything degree, anti-attrition, corrosion-resistant, explosion-proof and anti-flammability.The embedded SMA actuators of protector have multiple annular grooves and backflash.Due to stone Ink, copper and related rare earth element have self-lubricating property and heat-insulated, can anti-attrition, being combined with each other with polytetrafluoro ensure that this Kind of protector do not generated with pump shaft very little gap friction cause pump bearing seal protector abrasion hereby it is ensured that Its creep rupture life.One end face of protector and the end cap of pump bearing box are bolted to connection, the knot of multiple annular grooves The thermal insulation of structure and composite material can be condensed cooling down in the dilute lubricating oil being heated from pump to external diffusion or mist of oil, after condensation Mist of oil is flowed back into the cabinet of pump bearing box by backflash, and this cooling keeps constant the temperature in protector, will not be produced The raw medium convection phenomena generated by internal-external temperature difference, various atmosphere in environment will not generation because of convection current and lubricant mists The radial clearance of mixed merga pass bearing seal protector and pump shaft enters in the pump housing, not will cause profit and pumps intracorporal lubrication greasy dirt The abrasion to bearing such as dye and dust.So that bearing is remained normal operating conditions, improves the service life of pump and environmental protection.

The medicine have the advantages that bearing seal protector adds graphite, copper and rare earth element shape using polytetrafluoroethylene (PTFE) At composite material, there is good service performance and production performance, designed plus reasonable shape and structure, can directly with The end cap of bearing housing is fixedly connected, and covers the small―gap suture kept constant between pump shaft in the outside of pump shaft, is not generated and is rubbed and can hinder Only exotic mediums intrusion pumps interior lubricating oil and pollutes, and improves the service life of bearing seal protector and bearing, extends pump Maintenance cycle, reduce maintenance cost, lubricant mist do not diffuse into the ambient enviroment of pump, reaches environment protecting.

The present invention is further described with example with reference to the accompanying drawing:

Fig. 1 is bearing seal protector shape and structure schematic diagram.

Fig. 2 is that bearing seal protector installs and uses figure on pump bearing box.

13 backflash of pump bearing seal protector 2 annular groove of main body, 4 bearing seal protector and bearing box end cap spiral shell in Fig. 1 Bolt connecting hole.

1 pump bearing cabinet, 2 pump bearing, 3 pump bearing seal protector, 4 bearing box end cap, 5 bolt, 6 pump shaft in Fig. 2.

1 shape fabricating of main body of Fig. 1 middle (center) bearing seal protector is uniformly distributed at stepped cylinder on major diameter cylindrical body The hole 4 that can be connect by multiple shanks of bolt with pump bearing box end cap.There are multiple annulars in bearing seal protector inner hole cavity wall Slot 2 is sequentially distributed along perpendicular to 6 direction of pump shaft, has half logical backflash 3 along pump shaft direction is parallel to, its one end originates in path At cylindrical end face, within the scope of the certain length that linearly ends at bearing seal protector inner hole cavity wall.

In Fig. 2, pump bearing seal protector 3 is inserted between pump bearing box 1 and pump shaft 6, and bolt 5 passes through on protector 3 The multiple bolts hole being uniformly distributed are fixedly connected with corresponding threaded hole on the bearing (ball) cover 4 of pump bearing box 1.Pump bearing sealing Protector 3 adds graphite, the composite material of copper and rare earth using polytetrafluoroethylene (PTFE), its pyroconductivity is lower than pump bearing The cabinet and bearing (ball) cover 4 of case 1, the heat that pump shaft generates when rotating at high speed are just seldom transmitted by bearing seal protector 3 To bearing housing 1 and bearing (ball) cover 4, the temperature around pump seal bearing protector 3 keeps relative constant, does not generate the temperature difference, pumps There is very little gap between bearing seal protector 3 and pump shaft 6, guarantee the inner and outer ring of the pump around bearing seal protector 3 Border does not generate pressure difference and generates the convection current of inside and outside medium because of the temperature difference, and the high fever generated when 6 high speed rotation of pump shaft causes The dilute lubricating oil held in case 1 or mist of oil along the gap of pump bearing protector 3 and pump shaft 6 to when external diffusion, by pump seal axis The multiple annular grooves held in the inner hole cavity wall of protector 3 successively stop, and successively flow back into centrifugal pump shaft along backflash after condensation It holds in 1 cabinet of case, same environmental contaminants also therefore not can enter in 1 cabinet of pump bearing box, pollute lubricating oil, cause the axis of pump Wear damage is held, the service life of pump is improved, mist of oil does not leak out, and has reached environmental protection.

Claims

1. a kind of novel pump seal bearing protector uses polytetrafluoro material to add graphite for matrix, copper and rare earth element form multiple Condensation material is made into pump bearing seal protector, its main feature is that the body contours of protector are fabricated to stepped cylinder, major diameter circle It is uniformly distributed the hole that can be connect by multiple shanks of bolt with pump bearing box end cap on cylinder, has in bearing seal protector inner wall Multiple annular grooves are sequentially distributed along perpendicular to axial, have half logical backflash along axial direction, its one end originates in path cylinder body end At face, within the scope of the certain length that linearly ends at bearing seal protector inner hole cavity wall.