CN102723801A - Internal and external pressure balance structure and motor comprising the same - Google Patents

Internal and external pressure balance structure and motor comprising the same Download PDF

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Publication number
CN102723801A
CN102723801A CN2011100786400A CN201110078640A CN102723801A CN 102723801 A CN102723801 A CN 102723801A CN 2011100786400 A CN2011100786400 A CN 2011100786400A CN 201110078640 A CN201110078640 A CN 201110078640A CN 102723801 A CN102723801 A CN 102723801A
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CN
China
Prior art keywords
support
internal
pressure balance
motor
protection
Prior art date
Application number
CN2011100786400A
Other languages
Chinese (zh)
Inventor
康飞
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to CN2011100786400A priority Critical patent/CN102723801A/en
Publication of CN102723801A publication Critical patent/CN102723801A/en

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Abstract

The invention provides an internal and external pressure balance structure. The internal and external pressure balance structure comprises a supporting portion, a ventilating portion and a protecting portion. The supporting portion is provided with an axial through-hole. The ventilating portion is tightly jointed on the end surface of one end of the supporting portion. The protecting portion is of a cylindrical structure with one end closed. The protecting portion is sleeved on the supporting portion. Spaces are arranged between the protecting portion, the supporting portion and the ventilating portion, and the spaces communicate to an outside. A motor uses the internal and external pressure balance structure, which can guarantee that external steam or dust can not enter into the motor. The reliability of the ventilating portion is also guaranteed, and the ventilating portion is free from external impact. Therefore, the ventilating portion has the longer service life. The degradation of the insulation performance of the motor or short-circuit caused by the external steam or dust entering the motor can be avoided. The service life of the motor is prolonged to a certain extent.

Description

A kind of internal and external pressure balance structure and motor with this structure

Technical field

The present invention relates to a kind of internal and external pressure balance structure, relate in particular to a kind of internal and external pressure balance structure that is provided on the motor.

Background technology

Usually motor all adopts the form of sealing to design; Move in the open air so work as motor, when moving in the environment that perhaps temperature difference is bigger, motor temperature raises; Air pressure inside increases, and there is the outside seepage of small seam crossing in gas through end cap junction, attaching plug junction or other; Rain or during dewfall, when motor housing was caught a cold, air pressure inside reduced, so outside water attached to above-mentioned seam crossing when external environment condition so; May be inhaled into motor internal, cause motor internal decreasing insulating or short circuit, thereby electrical machinery life descends or lost efficacy, hermetic motor generates heat in running; Then motor internal air pressure increases, and can be higher than external pressure, has gas-liquid to overflow at fine places, slit such as connectors so; When motor cooled off, the air pressure inside of motor can be lower than external pressure, and corrosion such as water that then outside the slit, exist or the liquid that influences the electrical machine insulation performance can be inhaled into motor internal and cause motor properties to descend or inefficacy; In the prior art, adopt breather plug, in the time of maintenance of motor; Unplug breather plug and take a breath, jam-pack then, such structure; When the temperature generation quenching of motor, in the time of shock heating, inside and outside generation draught head has little time to carry out air pressure balance; Cause the motor internal that enters into of the micro gap of outside steam through other positions of motor, thereby cause the electrical machine insulation performance to reduce, electrical machinery life reduces.

Summary of the invention

It is bad that the present invention is intended to solve in the prior art the dustproof effect of motor air permeable waterproof, and the problem that can not regulate inner and outer air pressure at any time provides a kind of motor inside and outside air pressure balance that keeps at any time, the inside and outside air pressure balance structure that unfailing performance is high.

A kind of internal and external pressure balance structure, said pressure balancing structure comprise support portion, ventilative portion and protection portion, and the support portion is provided with axially extending bore; The end face of said support portion one end is provided with ventilative portion; Ventilative portion fits tightly on the said end face of this support portion, and said protection portion is the tube structure of end sealing, and protection portion is set in the support portion and is provided with on the end of ventilative portion; Be equipped with the gap between said protection portion and said support portion, the ventilative portion, said gap communicates with the external world.

Preferably, the end face of said support portion one end is provided with circular groove, and groove diameter is greater than the central lines of the center line and the axially extending bore of axially extending bore internal diameter and groove.

Preferably, said support portion is six prism structures, and said axially extending bore runs through said six prism structures.

Preferably, said ventilative portion adopts gluing to be fixed in the circular groove, and said ventilative portion is a ventail, and the material of said ventail is a polytetrafluoroethylene.

Preferably, said support portion forms a transition face between every adjacent two sides, said protection portion inwall be provided with the fixed groove that matches and locate with transition face.

Preferably, radially between said per two fixed grooves, be respectively equipped with a gas port on the said protection portion open end.

Preferably, said protection portion and the corresponding inwall of support portion end face are provided with convexity, and this convexity evenly distributes on inwall, forms the space between the convexity, and said convexity is resisted against on the end face away from motor one end of support portion.

Preferably, said support portion is a flexible material, and said flexible material is an acrylonitrile-butadiene rubber, and said protection portion is a hard material, and said hard material is a polybutylene terephthalate (PBT).

Preferably, the annexation of said protection portion and support portion adopts interference fit.

The present invention also provides a kind of motor; Said motor has the lug boss that is used to install said internal and external pressure balance structure; Run through said lug boss and be provided with the through hole that communicates with motor internal; Said motor also comprises described internal and external pressure balance structure, and said support portion has the axially extending bore that adapts with lug boss, and the support portion is set on the lug boss.

In the above technical scheme, said pressure balancing structure comprises support portion, ventilative portion and protection portion, and the support portion is provided with axially extending bore; The end face of support portion one end is provided with ventilative portion, and ventilative portion fits tightly on the said end face of support portion, and protection portion is the tube structure of end sealing; Protection portion is set in the support portion and is provided with on the end of ventilative portion, is equipped with the gap between protection portion and said support portion, the ventilative portion, and the gap communicates with the external world; Be in communication with the outside through this structure, this structure is assemblied on the motor with lug boss, but the inside and outside draught head of active balance motor; Because the existence of ventilative portion guarantees that extraneous steam or dust can not enter into motor internal, protection portion is enclosed in the outside, support portion simultaneously; Guarantee the reliability of ventilative portion, be not easy to receive foreign impacts, should ventilative portion longer service life thereby make.In addition, motor uses the internal and external pressure balance structure, has effectively avoided extraneous steam and dust entering motor internal, causes the electrical machine insulation decreased performance or is short-circuited, and has prolonged the useful life of motor to a certain extent.

Description of drawings

Fig. 1 is the inside and outside air pressure balance structure of an embodiment of the present invention and the sketch map that cooperates of motor;

Fig. 2 is the internal and external pressure balance structure structure support portion outline drawing of an embodiment of the present invention;

Fig. 3 is the axial sketch map of internal and external pressure balance support structure portion of an embodiment of the present invention;

Fig. 4 is the internal and external pressure balance structural defence bilge construction cutaway view of an embodiment of the present invention;

Fig. 5 is the internal and external pressure balance structural defence portion and position, the support portion graph of a relation of an embodiment of the present invention;

Fig. 6 is the exploded view of the internal and external pressure balance structure of an embodiment of the present invention;

Fig. 7 is the internal and external pressure balance structural defence bilge construction sketch map of an embodiment of the present invention.

Embodiment

Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

In conjunction with shown in Figure 1, be a kind of inside and outside air pressure balance mechanism, comprise protection portion 3, ventilative portion 5 and support portion 2; Support portion 2 is an open tubular column, and support column 2 is provided with axially extending bore, and ventilative portion 5 fits tightly on the end face of support portion 2 one ends; Protection portion 3 is the tube structure of end sealing; Protection portion 3 is set in support portion 2, between protection portion 3 and support portion 2, the ventilative portion 5 space is arranged, and said gap communicates with the external world.

In conjunction with shown in Figure 2, support portion 2 is an open tubular column, as a preferred scheme; On the end face of support portion one end, be provided with groove 21; Groove 21 can be different shape, as long as it is just passable to hold ventilative portion, is preferably circle; Said groove 21 is used to place ventilative portion 5, preferably the axially extending bore central lines of the center line of groove and open tubular column.

In conjunction with shown in Figure 3, support portion 2 is six prism structures, the installation of the portion of protection for ease 3; Preferably, be provided with a transition face between six prismatic every adjacent two sides, the groove 21 on 2 end faces of support portion is a concentric circles with support portion 2 interior bone; Groove 21 sizes are to hold ventilative portion 5 for good, and in the present embodiment, support portion 2 used materials are soft relatively material; Have elasticity, the convenient installation preferably adopted acrylonitrile-butadiene rubber.

Uses because ventilative portion 5 matches with groove 21 on 2 end faces of support portion, the shape of ventilative portion 5 is consistent with groove 21 shapes, and is big or small suitable; In the present embodiment, ventilative portion 5 is preferably circular ventail, is arranged in the groove 21 of support portion 2 end faces; Ventilative portion 5 adopts sealing glue closely to stick in the groove 21, and gas permeable material need satisfy permeable watertight and dustproof character, can adopt existing gas permeable material widely; In the present embodiment, preferably adopt polytetrafluoroethylene.

In conjunction with shown in Figure 4, protection portion 3 is the airtight cylindrical shell of an end, in the present embodiment; Protection portion 3 is a protective sleeve, and protection portion 3 is provided with convexity with the corresponding inwall of support portion end face that matches with it, and this convexity evenly distributes on inwall; Form air channel 34 between the convexity, said convexity is resisted against on the end face away from motor one end of support portion, for better ventilation; Preferably, said protruding 31 number is six, and the angle between the adjacent convexity 31 is 60 degree; On protection portion 3 internal side wall around being circumferentially with the fixed groove that matches with transition face 32 that is used for fixing support portion 2; Fixed groove 32 is arranged on the internal side wall along protection portion 3 axial directions, as a scheme preferably, circumferentially evenly is provided with six fixed grooves 32 in protection portion 3 inwall upper edges; Fixed groove 32 is on the angular bisector between the adjacent air channel 34; Angle between the adjacent fixed groove 32 also is 60 degree, and the material selection hard material of protection portion 3 preferably adopts polybutylene terephthalate (PBT).

As a scheme preferably; On protection portion 3 sidewalls, be provided with the pore 33 that is used to ventilate, said pore 33 radially runs through protection portion 3 sidewalls, preferably; Pore 33 is arranged on the end face of protection portion 3 opening directions; Pore 33 is arranged between the adjacent fixed groove 32, preferably is arranged on the angular bisector of adjacent fixed groove 32, and the angle between the adjacent pore 33 is 60 degree.

In conjunction with shown in Figure 5, be the connected mode of motor internal and external pressure balance support structure portion and protection portion, be hexagon because flexible material and radial cross-section have been adopted in support portion 2, protection portion 3 is a protective sleeve; Material is a hard material, and radial cross-section is circular, and support portion 2 connects together with protection portion 3; In the present embodiment, the transition face of support portion 2 is arranged in the fixed groove 32 on protection portion 3 inwalls, because the material that adopts is different; Adopt interference fit more firm, because support portion 2 radial sections are hexagon, protection portion 3 cross sections are circular; So, form six spaces between support portion 2 outer walls and protection portion 3 inwalls, form six airways 4.

The present invention also provides a kind of motor; Said motor has the lug boss 1 that is used to install said internal and external pressure balance structure, runs through said lug boss 1 and is provided with the through hole that communicates with motor internal, and said motor also comprises described internal and external pressure balance structure; Said support portion 2 has the axially extending bore that adapts with lug boss 1; Support portion 2 is set on the lug boss 1, and the support portion is a flexible material, can tightly be enclosed within on the lug boss 1; Motor communicates with the external world through said gap 4, realizes the motor internal and external pressure balance.

The course of work of inside and outside air pressure balance structure of the present invention is such: in the machine operation process, motor internal produces heat, causes internal gas to expand; Air pressure raises, and air pressure inside is through the air vent hole on the electric machine casing, to extraneous exhaust; The support portion is set on the air vent hole, and ventilative portion and support portion fit tightly together, because ventilative portion permeable watertight dustproof function; Prevented the entering of extraneous steam and dust, protection portion and the corresponding inwall of support portion end face are provided with convexity, this convexity on inwall all with distribute; Form air channel between the convexity, be convenient to ventilation, and on protection portion sidewall, be provided with pore equally; Because the support portion is that radial section is hexagonal open tubular column, protection portion is circular, and both are set-located through the interference mode; And through the cooperating of support portion transition face and fixed groove, make on the structure more firm, and through socket formation airway; Air pressure inside is passed ventilative portion and via the space that protection portion inner bottom surface convexes to form gas is guided to airway inside again, at the pore that on overprotection portion sidewall, is provided with through the casing air vent hole of flowing through; Unnecessary gas is discharged to the motor outside, and when motor was drenched with rain suddenly during in operate as normal or caught a cold, motor internal air pressure reduced; Motor is in communication with the outside through this structure, because the existence of ventilative portion guarantees that extraneous steam or dust can not enter into motor internal, protection portion is enclosed in the outside, support portion; Guarantee the reliability of ventilative portion, be not easy to receive foreign impacts, thereby made the portion's longer service life of to breathe freely; Motor internal and external pressure balance structure has been avoided extraneous steam and dust entering motor internal to cause the electrical machine insulation decreased performance or has been short-circuited, and has prolonged the useful life of motor to a certain extent.

The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. an internal and external pressure balance structure is characterized in that, said pressure balancing structure comprises support portion, ventilative portion and protection portion; The support portion is provided with axially extending bore, and the end face of said support portion one end is provided with ventilative portion, and ventilative portion fits tightly on the said end face of this support portion; Said protection portion is the tube structure of end sealing; Protection portion is set in the support portion and is provided with on the end of ventilative portion, is equipped with the gap between said protection portion and said support portion, the ventilative portion, and said gap communicates with the external world.
2. internal and external pressure balance structure according to claim 1 is characterized in that, the end face that said support portion is provided with ventilative portion one end is provided with circular groove, and groove diameter is greater than the central lines of the center line and the axially extending bore of axially extending bore internal diameter and groove.
3. internal and external pressure balance structure according to claim 2 is characterized in that, said support portion is six prism structures, and said axially extending bore runs through said six prism structures.
4. internal and external pressure balance structure according to claim 3 is characterized in that, said ventilative portion adopts gluing to be fixed in the circular groove, and said ventilative portion is a ventail, and the material of said ventail is a polytetrafluoroethylene.
5. inside and outside air pressure balance structure according to claim 3 is characterized in that, said support portion forms a transition face between every adjacent two sides, said protection portion inwall be provided with the fixed groove that matches and locate with transition face.
6. internal and external pressure balance structure according to claim 1 is characterized in that, radially between said per two fixed grooves, is respectively equipped with a gas port on the said protection portion open end.
7. internal and external pressure balance structure according to claim 1; It is characterized in that said protection portion and the corresponding inwall of support portion end face are provided with convexity, this convexity evenly distributes on inwall; Form the space between the convexity, said convexity is resisted against on the end face away from motor one end of support portion.
8. internal and external pressure balance structure according to claim 1 is characterized in that, said support portion is a flexible material, and said flexible material is an acrylonitrile-butadiene rubber, and said protection portion is a hard material, and said hard material is a polybutylene terephthalate (PBT).
9. internal and external pressure balance structure according to claim 1 is characterized in that, the annexation of said protection portion and support portion adopts interference fit.
10. motor; It is characterized in that; Said motor has the lug boss that is used to install said internal and external pressure balance structure, runs through said lug boss and is provided with the through hole that communicates with motor internal, and said motor also comprises any described internal and external pressure balance structure of claim 1-9; Said support portion has the axially extending bore that adapts with lug boss, and the support portion is set on the lug boss.
CN2011100786400A 2011-03-30 2011-03-30 Internal and external pressure balance structure and motor comprising the same CN102723801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100786400A CN102723801A (en) 2011-03-30 2011-03-30 Internal and external pressure balance structure and motor comprising the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100786400A CN102723801A (en) 2011-03-30 2011-03-30 Internal and external pressure balance structure and motor comprising the same

Publications (1)

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CN102723801A true CN102723801A (en) 2012-10-10

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215312A (en) * 1989-09-14 1993-06-01 Siemens Aktiengesellschaft Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening
CN1461712A (en) * 2002-05-15 2003-12-17 日东电工株式会社 Ventilation component, ventilation casing, anti-extrction component and external member for forming ventilation structure
CN101584260A (en) * 2006-12-22 2009-11-18 罗伯特·博世有限公司 Pressure compensation element for a housing and electrical automotive component comprising said pressure compensation element
CN201672953U (en) * 2010-04-29 2010-12-15 麦克传感器有限公司 Novel special terminal box for liquid-level pressure transmitter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215312A (en) * 1989-09-14 1993-06-01 Siemens Aktiengesellschaft Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening
CN1461712A (en) * 2002-05-15 2003-12-17 日东电工株式会社 Ventilation component, ventilation casing, anti-extrction component and external member for forming ventilation structure
CN101584260A (en) * 2006-12-22 2009-11-18 罗伯特·博世有限公司 Pressure compensation element for a housing and electrical automotive component comprising said pressure compensation element
CN201672953U (en) * 2010-04-29 2010-12-15 麦克传感器有限公司 Novel special terminal box for liquid-level pressure transmitter

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Application publication date: 20121010

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