CN205841996U - Bear the combination sealing signal line structure of external pressure - Google Patents

Abstract

This utility model relates to a kind of sealing structure, seal structure to be made up of O-ring seals (2), elastic sealed body (3), pressure ring (4), clamp nut (5) housing (6), seal and be made up of two seals, it is respectively O-ring seals (2) and elastic sealed body (3), O-ring seals (2) and elastic sealed body (3) are placed in unthreaded hole (7), elastic sealed body (3) and O-ring seals (2) contact surface are inclined-plane, the roughness of unthreaded hole is 0.8, and encapsulant uses the nitrile rubber of high rigidity.

Description

Bear the combination sealing signal line structure of external pressure

Technical field: this utility model relates to the combination sealing signal line structure bearing external pressure.

Background technology: 6000rpm frequency conversion high-speed wet type fire-proof motor is speedily carried out rescue work for colliery is permeable, and power is 600kW, voltage 6000V, vertical machine, is national science and technology supporting plan key project " colliery permeable Quick rescue drainage equipment research and development " The motor that problem is developed.Being all water outside this motor intracavity, motor casing inner chamber is clean water, is sewage outside motor casing, motor Bearing external pressure 10Mpa, the sewage outside motor casing can not enter motor, and to affect motor properly functioning, and the water in motor can not ooze out Outside motor, otherwise motor cannot be properly functioning.The water temperature holding wire that motor runs transmits signal, in order to be controlled, The inside of conventional wet type electric motor is full of water under high pressure, and motor bears intrinsic pressure, and outside is air, does not has to seal internal water, also Want sealed external water, bear the sealing structure of external pressure.The typically no requirement bearing 10Mpa external pressure of common submersible motor, also Being not necessarily wet type electric motor, in flameproof electrical apparatus, conventional clamp nut compresses elastic seal ring and carrys out hermetically-sealed cable and meet Requirement of explosion proof, but do not bear the requirement of hydraulic pressure, and this sealing structure life-time service, the aging sealing of flexible sealing ring The problem of impaired performance.

Summary of the invention: the purpose of this utility model is to provide a kind of combination sealing signal line structure bearing external pressure: ensure The sewage of outside motor can not enter in motor, and the water in motor can not ooze out motor cavity, seals outside structure 10Mpa to be born Pressure.The technical solution of the utility model is: 1) seals structure and is made up of two seals, and respectively O-ring seals (2) and elasticity is close Envelope body (3), O-ring seals (2) and elastic sealed body (3) are placed in the unthreaded hole (7) of housing (6), elastic sealed body (3) and O shape Sealing ring (2) contact surface is inclined-plane, and elastic sealed body (3) top installs pressure ring (4), clamp nut (5) successively.2) unthreaded hole (7) Roughness be 0.8, encapsulant use high rigidity nitrile rubber.

This utility model is sealed into two seals combination: elastic sealed body (3) seals and relies on tightening of nut, compresses pressure ring (4), elastic sealed body (3) is made to produce expanded radially while axial shortening, thus tight with housing (6) and holding wire (1) In conjunction with, produce and compress sealing function.Elastic sealed body (3) is inclined-plane with the contact surface of O-ring seals (2), when its compression O shape is close During seal (2), O-ring seals (2) under the effect of the pressure, is pressed against the both sides that groove is vertical, and it deforms increase, with groove both sides Contact surface increases, and plugs liquid leakage path, serves sealing function.O-ring seals (2) compressive deformation, produces elastic connecting Touch realizes the sealing of groove both sides, and the sealability of O-ring seals (2) typically raises with the rising of pressure, has both made elasticity Seal (3) lost efficacy, and O (2) is under the effect of external pressure, and the contact force relying on elastic deformation to produce also can prevent leakage.

Utility model works principle

This utility model is the sealing structure of a kind of holding wire for 6000rpm frequency conversion high-speed wet type fire-proof motor, this Utility model be sealed into two seals combination: elastic sealed body (3) seal rely on nut tighten compression pressure ring, make elastic packing Body (3) produces expanded radially while axial shortening, thus combines closely with housing (6) and holding wire (1), produces compression close Envelope effect.This structure meets requirement of explosion proof, can well play flame proof effect, meet motor requirement of explosion proof.Elastic sealed body (3) Also can compress O-ring seals (2), O-ring seals (2) compressive deformation time by compression, produce elastic contact force and realize sealing, O The sealability of shape sealing ring (2) typically raises with the rising of pressure, and elastic sealed body (3) contacts with O-ring seals (2) Face is inclined-plane, when it compresses O-ring seals (2), O-ring seals (2) under the effect of the pressure, be pressed against that groove is vertical two Side, its deformation is big, also increases with the contact surface of groove both sides, plugs liquid leakage path, serve sealing function.Both elasticity had been made Seal (3) lost efficacy, and O (2) is under the effect of external pressure, and the contact force relying on elastic deformation to produce also can prevent leakage.Close Seal prevents dielectric leakage or prevents impurity from invading motor cavity from outside.O-ring seals (2) belongs to contact seal self-sealing Compress and seal.

The technique effect of utility model: 1) pressure of the most salable both direction of individual pen, seal reliable.2) O-ring seals 2 Volume is little, lightweight, low cost.3) seal member simple in construction, is convenient to mount and dismount, and need not periodically adjust.The surface of unthreaded hole (7) Roughness 0.8 is because O-ring seals (2) is to the highest by sealing member roughness requirements, and the purpose improving surface roughness is to subtract Few frictional resistance, extends the service life of sealing ring；The quality of O-ring seals (2) and elastic sealed body (3) is to whole motor Normal work, service life all have a significant impact, and use the nitrile rubber of high rigidity to improve sealability for this.This practicality is new Type is sealed into two seals combination: elastic sealed body seals and relies on tightening of nut, compresses pressure ring, makes elastic sealed body axially Produce expanded radially while shortening, thus combine closely with housing (6) and holding wire (1), produce and compress sealing function, this knot Structure meets requirement of explosion proof, can play flame proof effect very well, meets motor requirement of explosion proof, elastic sealed body (3) and O-ring seals (2) contact surface is inclined-plane, and when it compresses O-ring seals (2), O-ring seals (2) under the effect of the pressure, is pressed against groove and hangs down Straight both sides, it deforms increase, increases with the contact surface of groove both sides, plug liquid leakage path, serve sealing function；O Shape sealing ring (2) volume is little, lightweight, low cost, and seal member simple in construction is convenient to mount and dismount, and need not periodically adjust, in pressure Producing elastic deformation under power effect, it is possible to seal groove both direction, both made elastic sealed body (3) lose efficacy, O-ring seals (2) exists Under the effect of external pressure, the contact force relying on elastic deformation to produce also can prevent leakage.Two seals combination well solves light External seal in water-stop and holding wire (1) place inside and outside hole, seals reliable, motor through verification experimental verification, not leakage.

Accompanying drawing illustrates:

Fig. 1 holding wire seals structure

Detailed description of the invention:

It is made up of as it is shown in figure 1, seal structure two seals, respectively O-ring seals (2) and elastic sealed body (3), O Shape sealing ring (2) and elastic sealed body (3) are placed in unthreaded hole (7), and elastic sealed body (3) and O-ring seals (2) contact surface are oblique Face, elastic sealed body (3) top installs pressure ring (4), clamp nut (5) successively.The roughness of unthreaded hole (7) is 0.8, encapsulant Use the nitrile rubber of high rigidity.This utility model is sealed into two seals combination: elastic sealed body (3) seals and relies on nut (5) tighten compression pressure ring, make elastic sealed body (3) produce expanded radially while axial shortening, thus with housing (6) and Holding wire (1) is combined closely, and produces and compresses sealing function.This structure meets requirement of explosion proof, can well play flame proof effect, full Foot motor requirement of explosion proof.Elastic sealed body (3) by compression time also can compress O-ring seals (2), O-ring seals (2) is by buckling Shape, produces elastic contact force and realizes sealing, and the sealability of O-ring seals typically raises with the rising of pressure, elastic close Envelope body (3) is inclined-plane with the contact surface of O-ring seals (2), and when it compresses O-ring seals (2), O-ring seals (2) is at pressure Effect under, both direction all can be deformed in length and breadth, and its deformation is big, also increases with the contact surface of groove both sides, plugs liquid Leakage path, serves sealing function.Both having made elastic sealed body (3) lose efficacy, O-ring seals (2), under the effect of external pressure, relies on The contact force that elastic deformation produces also can prevent leakage.Sealing ring prevents dielectric leakage or prevents impurity from invading motor from outside Chamber.Normal work, the service life of whole motor are all had a significant impact by the quality of sealing member.O-ring seals seals to belong to and connects Touch seals self-sealing and compresses sealing.O-ring seals, to the highest by sealing member roughness requirements, improves the purpose of surface roughness Being reducing friction resistance, extend the service life of sealing ring, the roughness requirements of unthreaded hole is 0.8；Encapsulant uses high hard The nitrile rubber of degree is to improve the sealability of sealing member.This sealing structural advantages 1) pressure of the most salable both direction of individual pen Power, seals reliable, 2) O-ring seals volume is little, lightweight, low cost 3) seal member simple in construction, it is convenient to mount and dismount, need not week Phase property adjusts.Producing elastic deformation under pressure, the contact force relying on elastic deformation to produce seals, two seals group Close and well solve inside and outside unthreaded hole external seal at water-stop and holding wire 1, safe and reliable.Motor, through verification experimental verification, does not has There is leakage.

This utility model is sealing signal line, the inside and outside water of motor cavity, seals structure simultaneously and still suffers from 10Mpa external pressure, and And meet flame proof requirement devise this seal structure, with nut (5) be screwed into compression elastic sealed body (3), make elastic sealed body (3) expanded radially while axial shortening, thus combine closely with unthreaded hole (7) and holding wire (1), for improve sealability and Elastic sealed body (3) uniform force, adds pressure ring (4) between elastic sealed body (3) and clamp nut (5), improves elastic close The hardness of envelope body improves the bearing capacity of elastic sealed body, also meets requirement of explosion proof simultaneously；Add O RunddichtringO (2), O RunddichtringO is that self-sealing compresses sealing, improves the reliability of sealing, simultaneously by the contact surface of elastic sealed body Yu O Being designed as inclined-plane compression O-ring seals to seal, two seals makes sealing reliable, reaches to use requirement.

Claims (2)

1. bear a combination sealing signal line structure for external pressure, it is characterized in that: seal structure and be made up of two seals, be respectively O-ring seals (2) and elastic sealed body (3), O-ring seals (2) and elastic sealed body (3) are placed in the unthreaded hole (7) of housing (6) In, elastic sealed body (3) and O-ring seals (2) contact surface are inclined-plane, elastic sealed body (3) top install successively pressure ring (4), Clamp nut (5).

A kind of combination sealing signal line structure bearing external pressure the most according to claim 1, is characterized in that: unthreaded hole (7) Roughness is 0.8, and encapsulant uses the nitrile rubber of high rigidity.