CN108223361A - A kind of electric fuel punp - Google Patents
A kind of electric fuel punp Download PDFInfo
- Publication number
- CN108223361A CN108223361A CN201710750142.3A CN201710750142A CN108223361A CN 108223361 A CN108223361 A CN 108223361A CN 201710750142 A CN201710750142 A CN 201710750142A CN 108223361 A CN108223361 A CN 108223361A
- Authority
- CN
- China
- Prior art keywords
- motor
- cooling section
- bearing
- oil
- electric
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0096—Heating; Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The present invention provides a kind of electric fuel punp, to solve the problems, such as that motor heat cannot discharge and influence motor service life in time in the prior art.Electric fuel punp includes the pump housing and the intermeshing driving and driven gear in the pump housing, further include the motor being sequentially connected with driving gear, it is equipped in the motor and connects at driving and driven geared end oil leak and the flow channels of oil sucting cavity, flow channels include making the motor cooling section at the leakage fuel oil position that flows through that the motor feels hot.Flow channels have cooling section, the position to generate heat in motor can be flowed through for leakage fuel oil, motor is cooled down, the heat that motor is discharged can be taken away during flowing, the heat for solving the problems, such as motor in the prior art cannot discharge in time, the fuel oil leaked in itself using driven gear simultaneously does not need to being passed through for other cooling media.
Description
Technical field
The present invention relates to a kind of electric fuel punps.
Background technology
Electric fuel punp is a kind of weight that fuel from fuel tank is sucked out, certain pressure is met to engine fuel oil system offer
Oil burning installation is wanted, using more in various airspace engine fuel systems.Develop with the continuous upgrading of China Aerospace technology,
The safety of leakage, electric device to fuel system is put forward higher requirements.Since the medium of fuel system is much kerosene
Medium, viscosity is small, is more prone to reveal.
Electric fuel punp of the prior art as depicted in figs. 1 and 2, is equipped with intermeshing active in the pump housing 1 and end cap 2
The pump housing 1 is separated into oil sucting cavity 15 and pumping cavity 16, oil sucting cavity 15 by gear 3 and driven gear 4, driving gear 3 and driven gear 4
It is connected with fuel tank, pumping cavity 16 is connected with fuel system.When gear is rotated by the direction of diagram 2 arrows meaning, oil sucting cavity 15
The interior gear teeth are constantly disengaged, and are made the sealed volume constantly increase of oil sucting cavity 15 and are formed vacuum, under atmospheric pressure effect
Fuel oil is sucked from fuel tank, the gear teeth that fuel oil is rotated bring pumping cavity 16 into, and 16 volume of pumping cavity becomes smaller, and fuel oil is pressed into fuel oil
System, this completes oil suctions and pressure oil process.Due to the driving gear 3 during practical set and driven gear 4 with
The pump housing 1 can not possibly be gap-free sealed, and fuel oil, master and slave moving teeth can be leaked on the axial end face of driving gear 3 and driven gear 4
Leakage fuel oil at the fuel leakage of wheel returns to fuel tank or oil sucting cavity 15 by the drainback passage being opened on the pump housing 1 and end cap
In.
Electric fuel punp further includes the electric machine casing 8 being connected with the pump housing 1 and the stator 10 in electric machine casing 8, stator
Rotor assembly is coated in 10, rotor assembly includes motor shaft 11, and motor shaft 11 is connected with driving gear shaft 5.In electric machine casing 8
Interior to be equipped with bearing 9, motor shaft 11 is threaded onto in the inner ring of bearing 9, and end ring is equipped in the left side of bearing 9.In the pump housing 1 and master
Rubber shaft seal 6 is equipped between movable gear shaft 5, rubber shaft seal 6 can prevent inner ring and outer circle of the kerosene medium by rubber shaft seal 6
It leaks into motor.
After long-term run at high speed, motor can generate heat motor, and heat cannot discharge in time, can influence making for motor
With the service life, motor operating is made to break down, harm is brought to entire fuel system.Simultaneously because rubber shaft seal 6 is dynamic sealing
Part, after long-time use, after the inner ring of rubber shaft seal 6 generates high rotating speed friction for a long time with driving gear shaft 5, it may occur that failure,
So as to generate leakage, the kerosene of leakage can pollute the bearing 9 of motor and the inner cavity of motor, bearing 9 is caused to damage, and event occurs in motor
Barrier.The problem of above-mentioned, can directly affect the working performance of entire engine, and harm is brought to entire fuel system.
Invention content
The purpose of the present invention is to provide a kind of electric fuel punps, cannot be released in time with solving motor heat in the prior art
The problem of putting and influencing motor service life.
To achieve the above object, the technical solution of electric fuel punp of the present invention is：A kind of electric fuel punp, including the pump housing and
Intermeshing driving and driven gear in the pump housing, further includes the motor being sequentially connected with driving gear, is set in the motor
Have at the driving and driven geared end oil leak of connection and the flow channels of oil sucting cavity, flow channels include leakage fuel oil is made to flow through motor
The motor cooling section of heating position.
Electric fuel punp provided by the invention includes the pump housing, and intermeshing for oil suction and pressure oil can be realized by being equipped in the pump housing
Driving gear and driven gear, motor drives driving gear to be rotated during use.Due to having part during normal use
There is the leakage of part by the end face and radial direction of driving gear and driven gear in fuel oil, and circulation was opened up in motor in the present invention
Road, the oil inlet of flow channels are connected with geared end leak, leakage fuel oil can be made to enter in flow channels, flow channels
Oil outlet connected with oil sucting cavity, due to oil sucting cavity pressure be less than driven gear leak pressure, leakage fuel oil can press
Entered under the action of difference by oil inlet and discharged by oil outlet.It, can be for revealing fuel oil stream again because flow channels have cooling section
The position to generate heat in motor is crossed, motor is cooled down, the heat that motor is discharged can be taken away during flowing, is solved existing
The problem of heat for having motor in technology cannot discharge in time, while using the fuel oil of itself leakage, do not need to other coolings and be situated between
Matter is passed through.
The pump housing be equipped with for the leakage fuel oil collection channel being connected at driving and driven geared end oil leak, it is described
Leak one end end of the outlet of fuel oil collection channel on the pump housing where close motor.
Motor includes electric machine casing, and flow channels include being set on being connected with leakage fuel oil collection channel on electric machine casing
Leak fuel oil receiving channel.
The motor cooling section is reentrant pathway, and motor cooling section includes parallel extending along motor length direction first cold
But section and the second cooling section, motor cooling section further include the linkage section of the first cooling section of connection and the second cooling section.
The coil and rotor extended along electrical axis direction is equipped in motor, the first cooling section is set between rotor and coil
And extend along electrical axis direction, the second cooling section is set on electric machine main shaft and extends along electrical axis direction.
The electric machine main shaft stays at electricity by the clutch shaft bearing and second bearing branch arranged along electric machine main shaft axially spaced-apart
On casing body, have between the rolling element of one and inside and outside circle and retainer in clutch shaft bearing and second bearing far from driving gear
Have the first rolling gap, one end of the separate driving gear of the electric machine main shaft and electric machine casing arranged for interval and form compartment
Gap, the first rolling gap constitute the linkage section with being spaced gap.
The length in an axial direction of first cooling section is not less than the axial length of coil and covers the line in an axial direction
Circle.
Have the between a rolling element of driving gear and inside and outside circle and retainer in clutch shaft bearing and second bearing
Two roll gap, the second rolling gap connection leakage fuel oil receiving channel and oil sucting cavity and form bearing cooling section.
The clutch shaft bearing and second bearing are ceramic bearing.
Electric machine casing end face corresponding on the pump housing is equipped with the sealing ring of isolation leakage fuel oil receiving channel and oil sucting cavity.
Description of the drawings
Fig. 1 is the schematic diagram of electric fuel punp in the prior art；
Fig. 2 is driving gear in electric fuel punp in the prior art and driven gear cooperation oil suction, the schematic diagram of pressure oil；
Fig. 3 is the schematic diagram with leakage fuel flow direction of electric fuel punp embodiment 1 of the present invention；
Fig. 4 is the outline drawing of electric fuel punp embodiment 1 of the present invention；
Fig. 5 is the schematic diagram of electric fuel punp embodiment 2 of the present invention.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment 1 of the electric fuel punp of the present invention, as shown in Figures 2 to 4, electric fuel punp include the pump housing 1, pump
Body 1 is equipped with intermeshing driving gear 3 and driven gear 4, and driving gear shaft 11 and driven gear shaft pass through pump housing bearing
12 rotations are set on the pump housing 1.End cap 2 is equipped in the left end of the pump housing, end cap 2 is by 5 location and installation of positioning pin in a left side for the pump housing 1
The left end of the pump housing is fixed at end by screw 13.Axial pass-through holes 6 are equipped on driven gear shaft.Portion is had during normal use
The fuel oil divided is leaked by the axial end face of driving gear 3 and driven gear 4.On end cap 2 be equipped with connection driven gear end face and
The drainback passage of oil sucting cavity is equipped with connection two axial end face of driven gear of axial pass-through holes 6 on driven gear shaft.
Motor is connected on the right side of the pump housing, motor includes electric machine casing 24, stator 26, stator are equipped in electric machine casing 24
Rotor assembly is coated in 26, rotor assembly includes magnet steel 25 and electric machine main shaft 9, and electric machine casing 24 passes through screw with the pump housing 1
It is fixedly linked, sealing ring 18 is equipped on the corresponding end face of electric machine casing 24 and the pump housing 1.
Equipped with spaced apart second bearing 19 and clutch shaft bearing 21, second bearing 19 are located in left-right direction in motor
The left end of clutch shaft bearing 21.The both ends of electric machine main shaft 9 are threaded onto in the inner ring of second bearing 19 and clutch shaft bearing 21, electric machine main shaft
9 left end is connected with driving gear shaft 11, and driving gear shaft 11 is plugged in correspondence one end of electric machine main shaft 9, and the two passes through semicircle
Key realizes rotation stop assembling, also achieves the interconnection in axial direction.Axial passage 10, axial passage 10 are equipped on electric machine main shaft
Right end be pierced by by the right end face of electric machine main shaft 9, radial passage 17 is additionally provided on electric machine main shaft 9, radial passage 17 connects
Axial passage 10 and oil sucting cavity 15.
The pump housing channel 7 being connected with the axial pass-through holes of driven gear shaft 6 is offered on the pump housing 1, pump housing channel 7 can
Enter in it for the leakage fuel oil on driving gear and driven gear end face, annular overcurrent is offered on the right end end face of the pump housing
Slot 23, annular flow-conveying groove 23 are connected with pump housing channel 7.The outer tunnel 8 of annular is offered on electric machine casing 24, annular is outer logical
Road is connected with annular flow-conveying groove 23.First passage 27,27 edge of first passage are equipped between rotor assembly and coil 20 in motor
The axis direction extension of motor, and the length of first passage 27 is not less than the length of coil 20 and covers coil in the axial direction
20.Leakage fuel oil will not impact the normal operation of motor by flowing in first passage 27.
Wherein the rolling element of second bearing 19 and clutch shaft bearing 21 is connected with outer tunnel 8, and clutch shaft bearing 21 is located at motor
The right end end of main shaft 9.Rolling element and the inner ring of second bearing or the retainer of second bearing wherein in second bearing 19
Between have second to roll gap, the leakage fuel oil in outer tunnel 8 can pass through under the action of pressure differential second roll between clearance flow
To oil sucting cavity 15.
Axial passage 10 and radial passage 17 are offered in electric machine main shaft 9, wherein the right end of axial passage 10 is by motor
It is pierced by main shaft 9, radial passage 17 connects axial passage 10 and oil sucting cavity 15.Such as Fig. 3 as can be seen that the right end of electric machine main shaft 9
The arranged for interval between motor body and form interval gap, the rolling element of clutch shaft bearing 21 and the inner ring of clutch shaft bearing or the
Have first to roll gap between the retainer of one bearing, the leakage fuel oil in first passage 27 can pass through first roll gap,
Gap is spaced, is entered back into the axial passage 10 of electric machine main shaft, enters oil sucting cavity 15 using the radial passage 17 of electric machine main shaft
In.Since the pressure of oil sucting cavity is smaller, under the action of pressure differential, the fuel oil meeting in outer tunnel, axial passage and radial passage
It flows, takes away the heat that motor generates during flowing, prevent the heat aggregation that motor generates from motor being caused to occur
Failure.
In the present embodiment, clutch shaft bearing and second bearing are ceramic bearing, since ceramic bearing does not need to grease lubrication,
Rub resistance, long lifespan will not cause the normal operation of ceramic bearing even if fuel oil is flowed through by the rolling element of ceramic bearing
It influences.
In the present embodiment, axial passage constitutes the second cooling section, and first passage is the first cooling section, and the two is along motor
Length direction arrange parallel.Interval gap together constitutes linkage section with the second rolling gap.First cooling section, the second cooling
Section together forms motor cooling section with linkage section.
In the present embodiment, the second rolling gap constitutes bearing cooling section.
In the present embodiment, using driving gear and the leakage fuel oil of driven gear, fire leakage using the effect of pressure differential
Oil flows in motor.Pump housing channel 7 is to leak fuel oil collection channel.Outer tunnel is to leak fuel oil receiving channel.
In the present embodiment, the import of leakage fuel oil receiving channel is oil inlet, in radial passage for leakage fuel oil stream
Opening in the one end open gone out and the second rolling gap for leakage fuel oil discharge is oil outlet.
The specific embodiment 2 of electric fuel punp of the present invention, as shown in figure 5, the difference lies in this realities with embodiment 1
It applies in example, sealing oil baffle 28 is equipped on the right side of second bearing 19, the fluid in leakage fuel oil receiving channel 8 can be prevented to lead to
It crosses second bearing 19 to enter in oil sucting cavity, at this point, only remaining motor cooling section in electric fuel punp.
Claims (10)
1. a kind of electric fuel punp, the intermeshing driving and driven gear including the pump housing and in the pump housing further include and active
The motor of gear drive connection, it is characterised in that：It is equipped in the motor and connects at driving and driven geared end oil leak and oil sucting cavity
Flow channels, flow channels include making the motor cooling section at the leakage fuel oil position that flows through that the motor feels hot.
2. electric fuel punp according to claim 1, it is characterised in that：The pump housing be equipped with for master and slave moving teeth
The leakage fuel oil collection channel being connected at wheel end oil leak, the outlet of the leakage fuel oil collection channel are on the pump housing close to electricity
One end end where machine.
3. electric fuel punp according to claim 1, it is characterised in that：Motor includes electric machine casing, and flow channels include
The leakage fuel oil receiving channel connected with leakage fuel oil collection channel on electric machine casing.
4. electric fuel punp according to claim 3, it is characterised in that：The motor cooling section be reentrant pathway, motor
Cooling section includes the first cooling section and the second cooling section that extend parallel along motor length direction, and motor cooling section further includes connection
The linkage section of first cooling section and the second cooling section.
5. electric fuel punp according to claim 4, it is characterised in that：It is equipped with what is extended along electrical axis direction in motor
Coil and rotor, the first cooling section are set between rotor and coil and extend along electrical axis direction, and the second cooling section is set on electricity
Extend on owner's axis and along electrical axis direction.
6. electric fuel punp according to claim 5, it is characterised in that：The electric machine main shaft passes through axial along electric machine main shaft
Spaced apart clutch shaft bearing and second bearing branch are stayed on electric machine casing, far from driving tooth in clutch shaft bearing and second bearing
Have first to roll gap, the separate driving tooth of the electric machine main shaft between the rolling element of one of wheel and inside and outside circle and retainer
One end of wheel and electric machine casing arranged for interval and form interval gap, the first rolling gap constitutes the company with being spaced gap
Connect section.
7. electric fuel punp according to claim 5, it is characterised in that：The length in an axial direction of first cooling section is not
Less than coil axial length and cover the coil in an axial direction.
8. electric fuel punp according to claim 6, it is characterised in that：Close to driving tooth in clutch shaft bearing and second bearing
Have second to roll gap between the rolling element of one of wheel and inside and outside circle and retainer, described second rolls gap connection leakage
Fuel oil receiving channel and oil sucting cavity and form bearing cooling section.
9. electric fuel punp according to claim 6, it is characterised in that：The clutch shaft bearing and second bearing are ceramics
Bearing.
10. according to the electric fuel punp described in claim 3-9 any one, it is characterised in that：Electric machine casing is corresponding with the pump housing
End face be equipped with isolation leakage fuel oil receiving channel and oil sucting cavity sealing ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017106691952 | 2017-08-08 | ||
| CN201710669195 | 2017-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108223361A true CN108223361A (en) | 2018-06-29 |
Family
ID=62654423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710750142.3A Pending CN108223361A (en) | 2017-08-08 | 2017-08-28 | A kind of electric fuel punp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108223361A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005867A (en) * | 2019-12-25 | 2020-04-14 | 潍柴动力股份有限公司 | Driving shaft connecting structure of pump and combined gear pump |
| CN111878387A (en) * | 2020-07-14 | 2020-11-03 | 河南航天液压气动技术有限公司 | Gear pump |
| CN115370950A (en) * | 2022-08-19 | 2022-11-22 | 西南石油大学 | Self-generating rotor oil transfer pump active oil supply lubrication bearing system |
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| EP3056735A1 (en) * | 2015-02-13 | 2016-08-17 | Jihostroj a.s. | Gear pump with drive |
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2017
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| 钟平: "《液压与气压传动》", 29 February 2008, 哈尔滨工业大学出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005867A (en) * | 2019-12-25 | 2020-04-14 | 潍柴动力股份有限公司 | Driving shaft connecting structure of pump and combined gear pump |
| CN111005867B (en) * | 2019-12-25 | 2021-10-08 | 潍柴动力股份有限公司 | Driving shaft connecting structure of pump and combined gear pump |
| CN111878387A (en) * | 2020-07-14 | 2020-11-03 | 河南航天液压气动技术有限公司 | Gear pump |
| CN111878387B (en) * | 2020-07-14 | 2022-08-12 | 河南航天液压气动技术有限公司 | Gear pump |
| CN115370950A (en) * | 2022-08-19 | 2022-11-22 | 西南石油大学 | Self-generating rotor oil transfer pump active oil supply lubrication bearing system |
| CN115370950B (en) * | 2022-08-19 | 2024-01-16 | 西南石油大学 | Active oil supply lubrication bearing system of self-generating rotor oil transfer pump |
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Application publication date: 20180629 |