CN207691658U - A kind of sealing structure of aircraft oil pump brushless direct current motor - Google Patents
A kind of sealing structure of aircraft oil pump brushless direct current motor Download PDFInfo
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- CN207691658U CN207691658U CN201721542521.5U CN201721542521U CN207691658U CN 207691658 U CN207691658 U CN 207691658U CN 201721542521 U CN201721542521 U CN 201721542521U CN 207691658 U CN207691658 U CN 207691658U
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Abstract
The utility model is related to a kind of sealing structures of aircraft oil pump brushless direct current motor, to prevent aircraft oil pump brushless direct current motor kerosene from penetrating into, the controller and position sensor passes through the through-hole on motor stator casing to be connected to outside by motor lead-out wire, and it is connect with machine winding by the through-hole that end cap lead-out wire through end covers, the sealing structure includes motor lead-out wire post assembly and end cap lead-out wire post assembly, the motor lead-out wire post assembly includes sintered glass layer and the bushing being successively set on from inside to outside outside motor lead-out wire, the end cap lead-out wire post assembly includes sintered glass layer and the bushing being successively set on from inside to outside outside end cap lead-out wire.Compared with prior art, the utility model has many advantages, such as that at low cost, processing technology is good, service life is long, inspection is convenient, versatile.
Description
Technical field
The utility model is related to motor designs fields, more particularly, to a kind of aircraft oil pump brushless direct current motor
Sealing structure.
Background technology
Oily pump motor provides power for aircraft fuel pump, and impeller rotation provides regulation to aircraft fuel system
The fuel oil of flow and pressure.Such motor working environment is special --- in aircraft fuel oil aviation kerosine, it is desirable that be resistant to kerosene, body
The small, longevity of service of product, working life need to generally reach hours thousands of or even up to ten thousand.It is provided using brushed DC motor in the past
When power, because brush wear need to be repaired frequently, replace motor, the flight time is restricted.Recent decades are quickly grown brushless
Dc motor using electronic commutating device because, instead of brush-commutated device, avoiding brush wear problem, electrical machinery life obtains
To greatly improving.The electronic commutation part of brushless motor is made of controller and position sensor, and controller and position pass
Sensor is made of various accurate, sensitive components and integrated circuit, intolerant to kerosene, once it is polluted by kerosene, it may appear that failure
Or failure, consequence is very serious, gently then influences product quality, pollutes environment, heavy then can lead to fatal crass.Therefore to control
The resistance to kerosene design of Sealing Structure of device and position sensor is the key technology of Oil pump electrical machinery.The sealing performance of motor is to determine oil
The key factor in pump motor service life often directly determines entire although sealing structure only accounts for the smaller proportion of entire motor
Safety, reliability and the durability of the even entire fuel pump system of motor, to as evaluate entire fuel system quality, can
By an important indicator of property.
Fluid Sealing has two kinds of static seal and dynamic sealing by form to be divided to mainly.Movable sealing structure reliability is relatively low, fixed
It is inconvenient when use that phase safeguards, and static seal structure is relatively simple, practicality is reliable, maintenance is more convenient.
Because electric machine structure is more special, moving component --- bearing and rotor are immersed directly in aviation kerosine, need to utilize
Aviation kerosine is lubricated to bearing and heat loss through conduction cooling motor, and the rotating speed of motor is very high, reaches 13000r/min or more, such as
Fruit uses movable sealing structure, and the abrasion of sealing element will quickly, and sealing effect is poor, is also unfavorable for prolonging the service life.Therefore
When considering motor sealing structure, we select to static structures component --- and controller and position sensor part are taken close
Envelope selects reliability higher static seal structure.This structure can take the group that sealing element, sealing ring and sealant are combined
Close sealing means.This sealing structure experiment proves that, it is simple in structure, can avoid fuel leakage, sealing structure and do not wear, can
It is greatly enhanced by property and job stability, service life.
The common static seal structure of motor mostly uses greatly the form that rubber o-ring is combined with epoxide-resin glue, such as
Shown in Fig. 1.The operation principle of this sealing structure is：
Motor is all soaked in aviation kerosine, and oil inlet is unable in controller and position sensor 9, if do not taken close
Envelope, kerosene enter controller and position sensor part channel have it is several following：
1, it is leaked from the installation seam allowance of end cap and motor stator casing 2.
2, from 2 joint leadkage of outer cover and motor stator casing.
3, from binding post and 8 mounting hole slot leakage of end cap or leakage etc..
4, controller part is leak into from 1 mounting hole of motor lead-out wire.
For the above oil leak channel, corresponding seal approach can be taken to solve：
1, axial seal is formed using rubber o-ring 15, prevents end cap from the leakage of seam allowance being installed with casing.
2, radial seal is formed using rubber o-ring 14, prevents the leakage of outer cover and stator cage seam crossing.
3, using epoxide-resin glue 11 by binding post and end cap embedding at sealing structure is formed after an entirety, prevent wiring
Slot leakage or leakage between column and end cap installing hole.
4, using being sealed after 16 embedding of epoxide-resin glue, the kerosene leakage certainly between lead-out wire and mounting hole is prevented.
But the problem that this sealing structure encounters in actual production manufacturing process has the following aspects：
1, the outer cover 10 of motor is metal material, and mounting surface is a thin-walled section, and in assembling and dissembling process, opening can squeeze
The outer surface of rubber o-ring 14 is crossed, this assembly method has the hidden danger on 14 surface of cut wound rubber o-ring, especially
In multiple assembly and disassembly, the probability on 14 surface of incised wound rubber o-ring is further increased, it may appear that the case where oil leak.
2, kerosene is a kind of corrosivity, the stronger liquid of permeability, and epoxide-resin glue long period of soaking will produce in kerosene
There is Leakage in crackle.
3, epoxide-resin glue needs high temperature and exhaust apparatus in embedding and solidification, and the processing of embedding tooling is complicated, exhaust effect
Fruit is bad to will produce aeration sealing effect.And end cap can be caused to deform when hot setting, the installation dimension of end cap
Geometrical Tolerance Principle is very tight, and secondary operation is needed just to can ensure that design and processes requirement.
4, epoxide-resin glue differs larger with the coefficient of expansion of end cap aluminium alloy, and long-term work is in high and low temperature environment lower end
Between lid and epoxy cracks influence sealing effect is will produce because expanding with heat and contract with cold.
Utility model content
The purpose of this utility model be exactly in order to overcome the problems of the above-mentioned prior art and provide it is a kind of at low cost plus
Work good manufacturability, service life are long, examine convenient, versatile aircraft oil pump brushless direct current motor sealing structure.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of sealing structure of aircraft oil pump brushless direct current motor, to prevent aircraft oil pump brush-less Dc motor
Machine-made egg-shaped or honey-comb coal briquets oil penetrates into, which includes controller and position sensor and the outer cover sealed against each other, motor stator
Shell and end cap, the controller and position sensor are mounted in the sealing space in outer cover, the controller and position
Set sensor passes through the through-hole on motor stator casing to be connected to outside by motor lead-out wire, and is worn by end cap lead-out wire
The through-hole crossed on end cap is connect with machine winding, which includes that motor lead-out wire post assembly and end cap lead-out wire connect
Terminal component, the motor lead-out wire post assembly include the sintering being successively set on from inside to outside outside motor lead-out wire
Glassy layer and bushing, the end cap lead-out wire post assembly includes being successively set on from inside to outside outside end cap lead-out wire
Sintered glass layer and bushing.
The motor lead-out wire and end cap lead-out wire is kovar alloy lead-out wire.
The excircle of bushing of the motor lead-out wire post assembly and end cap lead-out wire post assembly is equipped with outer spiral shell
Line.
It is close that the bushing outer layer of the motor lead-out wire post assembly and end cap lead-out wire post assembly is equipped with screw thread
Sealing.
The motor stator casing passes through rubber o-ring axial seal with outer cover.
The kovar alloy lead-out wire is identical as the coefficient of expansion of sintered glass layer.
Compared with prior art, the utility model has the following advantages：
1, end-cap assembly processing cost is low, economy is more preferable：The wiring column material of end cap has been all made of glass sintering effect
Good kovar alloy, the shape simplification of binding post, processing technology is convenient, qualification rate is very high；On the other hand, sintered glass
Linear expansion coefficient with kovar alloy is very close to sintering effect is good, and pairs of posts component carries out air-leakage test technology after sintering
Also more ripe；It when finally post assembly being installed on end cap, is connected through a screw thread, the sealing of the resistance to kerosene of addition in thread groove
Glue, this sealing means end cap, which is not required to heating, to be deformed, and there is no need to carry out the secondary of precise measure to end cap to add
Work reduces end-cap assembly machining period, while also substantially increasing the qualification rate of end-cap assembly.Improve the conjunction of rear end cap assemblies
Lattice rate can reach 100% substantially, and the problem of completely solve oil leak, therefore the economy of improved end-cap assembly is more preferable.
Binding post uses aluminum alloy materials, component to use epoxy sealing before scheme is improved, and bubble is will produce in embedding and end cap becomes
Shape, and epoxy resin differs larger with the coefficient of expansion of aluminium alloy, the final qualification rate of end-cap assembly can only achieve 50%~
70% or so, and the seam crossing of epoxy resin and end cap will appear gap to post assembly after immersion for a long time in kerosene, go out
The problem of existing oil leak.
2, end-cap assembly processing technology is good：Scheme before improvement is using end cap and binding post entirety epoxy sealing, embedding
Moulds of industrial equipment are complicated and to be easy play, the positional precision consistency in end cap bad for binding post position, affect end cap group
The processing technology and quality of part.And scheme improve after only need pairs of posts carry out glass sintering, and glass sintering technology compared at
Ripe, tooling is simply, binding post registration, processing technology are good, consistency is good, inspection is convenient, and end cap can be in the part stage
In place by all size time processings, post assembly is also more convenient in the installation with end cap.
3, service life is long：The binding post reliable useful life of glass sintering is verified in vacuum component, can
It is avoided completely after outer cover is changed to axial seal with casing junction rubber o-ring by radial seal with reaching thousands of hours
The hidden danger of rubber o-ring surface incised wound, reliable useful life are longer.
4, it is convenient to examine：The test stone of pairs of posts component being sealed property inspection is ripe, and validity is more preferable.
5, versatile：The glass sintering binding post sealing structure of the utility model is simple, small, can be more conveniently
It applies in various complicated sealing structures, reaches good fluid-tight effect.
Description of the drawings
Fig. 1 is the motor sealing structure schematic diagram before improving.
Fig. 2 is the improved motor sealing structure schematic diagram of the utility model.
Fig. 3 is binding post glass sintering figure.
Fig. 4 is improved end-cap assembly structural schematic diagram.
Wherein：1, motor lead-out wire, 2, motor stator casing, 3, rubber o-ring, 4, outer cover screw thread position, 5, electricity
Power traction outlet binding post component, 6, rubber o-ring, 7, end cap lead-out wire post assembly, 8, end cap, 9, controller and position
Set sensor, 10, outer cover, 11, epoxy resin, 12, copper binding post, 13, screw, 14, rubber o-ring, 15, RUBBER O shape
Sealing ring, 16, epoxy resin.
Specific implementation mode
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment：
As in Figure 2-4, the motor lead-out wire post assembly 5 and end cap that the motor lead-out wire 1 of the utility model needs
The end cap lead-out wire post assembly 7 that lead-out wire needs is all made of the shape of formation component after the better glass sintering of sealing effect
Formula, post assembly figure are as shown in Figure 3.For ensure post assembly be not in after glass sintering cracking glasses, aging with
And wiring column material is changed to kovar alloy material by the problem of being corroded by kerosene, the utility model by original Cu alloy material,
The linear expansion coefficient of kovar alloy is closer with sintered glass, is not in apparent difference after two kinds of match materials, and can cut down conjunction
Gold can be infiltrated by glass well.This sealing structure form of binding post usually vacuum component for example transmitting tube, oscillating tube,
It uses in transistor, seal socket, was not actually used in motor.
Lead-out wire in motor binding post structure, is burnt this sealing technique first Application by the utility model using glass
Form a component, the outer circle of component uses thread connecting mode, and after being screwed into end cap threaded hole, thread surface adds the spiral shell of resistance to kerosene
Line fluid sealant.
To avoid outsides cover of electric machinery 10 from damaging O-ring seal surface in assembling and dissembling process, the utility model improves outer cover 10
With the seal form of motor stator casing 2, axial seal is changed to by original radial seal, rubber is compressed by the end face of outer cover
3 side of O-ring seals will not hurt the outer surface of rubber o-ring 3, the dismounting process of motor when installing outer cover in this way
Property and maintenanceability higher.
Claims (6)
1. a kind of sealing structure of aircraft oil pump brushless direct current motor, to prevent aircraft oil pump brushless direct current motor
Kerosene penetrates into, which includes controller and position sensor (9) and the outer cover (10), the motor that seal against each other
Stator casing (2) and end cap (8), the controller and position sensor (9) are mounted in the sealing space in outer cover (10),
The controller and position sensor (9) pass through through-hole and outside on motor stator casing (2) by motor lead-out wire (1)
Connection, and pass through the through-hole on end cap (8) to be connect with machine winding by end cap lead-out wire (1), which is characterized in that the sealing
Structure includes motor lead-out wire post assembly (5) and end cap lead-out wire post assembly (7), the motor lead-out wire wiring
Column assembly (5) includes being successively set on motor lead-out wire (1) external sintered glass layer and bushing, the end cap from inside to outside
Lead-out wire post assembly (7) includes sintered glass layer and the bushing being successively set on from inside to outside outside end cap lead-out wire.
2. a kind of sealing structure of aircraft oil pump brushless direct current motor according to claim 1, which is characterized in that institute
The motor lead-out wire (1) and end cap lead-out wire stated are kovar alloy lead-out wire.
3. a kind of sealing structure of aircraft oil pump brushless direct current motor according to claim 1, which is characterized in that institute
The excircle of bushing of the motor lead-out wire post assembly (5) and end cap lead-out wire post assembly (7) stated is equipped with external screw thread.
4. a kind of sealing structure of aircraft oil pump brushless direct current motor according to claim 3, which is characterized in that institute
The bushing outer layer of the motor lead-out wire post assembly (5) and end cap lead-out wire post assembly (7) stated is equipped with thread locking adhesive.
5. a kind of sealing structure of aircraft oil pump brushless direct current motor according to claim 1, which is characterized in that institute
The motor stator casing (2) stated passes through rubber o-ring axial seal with outer cover (10).
6. a kind of sealing structure of aircraft oil pump brushless direct current motor according to claim 2, which is characterized in that institute
The kovar alloy lead-out wire stated is identical as the coefficient of expansion of sintered glass layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721542521.5U CN207691658U (en) | 2017-11-17 | 2017-11-17 | A kind of sealing structure of aircraft oil pump brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721542521.5U CN207691658U (en) | 2017-11-17 | 2017-11-17 | A kind of sealing structure of aircraft oil pump brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207691658U true CN207691658U (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721542521.5U Active CN207691658U (en) | 2017-11-17 | 2017-11-17 | A kind of sealing structure of aircraft oil pump brushless direct current motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880066A (en) * | 2018-08-21 | 2018-11-23 | 天津长瑞大通流体控制系统有限公司 | Shaft is positive sealing structure and method of the motor in deep-sea of reverse rotation mode |
| CN110176828A (en) * | 2019-04-25 | 2019-08-27 | 贵州凯敏博机电科技有限公司 | A kind of motor and method of anti-super high impact overload |
| CN110829687A (en) * | 2019-11-15 | 2020-02-21 | 陕西航空电气有限责任公司 | Glass-sintered brushless direct current motor end cover |
| WO2022222525A1 (en) * | 2021-04-21 | 2022-10-27 | 成都凯天电子股份有限公司 | Aero-engine control end sealing device |
-
2017
- 2017-11-17 CN CN201721542521.5U patent/CN207691658U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880066A (en) * | 2018-08-21 | 2018-11-23 | 天津长瑞大通流体控制系统有限公司 | Shaft is positive sealing structure and method of the motor in deep-sea of reverse rotation mode |
| CN108880066B (en) * | 2018-08-21 | 2023-12-22 | 天津长瑞大通流体控制系统有限公司 | Sealing structure and method for motor with rotating shaft in forward and reverse rotation mode in deep sea |
| CN110176828A (en) * | 2019-04-25 | 2019-08-27 | 贵州凯敏博机电科技有限公司 | A kind of motor and method of anti-super high impact overload |
| CN110829687A (en) * | 2019-11-15 | 2020-02-21 | 陕西航空电气有限责任公司 | Glass-sintered brushless direct current motor end cover |
| CN110829687B (en) * | 2019-11-15 | 2022-03-29 | 陕西航空电气有限责任公司 | Glass-sintered brushless direct current motor end cover |
| WO2022222525A1 (en) * | 2021-04-21 | 2022-10-27 | 成都凯天电子股份有限公司 | Aero-engine control end sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 3286, Zhao Lou Road, Minhang District, Shanghai Patentee after: Shanghai Aerospace Intelligent Equipment Co.,Ltd. Address before: No. 3286, Zhao Lou Road, Minhang District, Shanghai Patentee before: SHANGHAI AEROSPACE COMMUNICATION ELECTRIC Co. |
|
| CP01 | Change in the name or title of a patent holder |