CN207230133U - A kind of rotor-type oil pump for reducing noise - Google Patents
A kind of rotor-type oil pump for reducing noise Download PDFInfo
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- CN207230133U CN207230133U CN201721219755.6U CN201721219755U CN207230133U CN 207230133 U CN207230133 U CN 207230133U CN 201721219755 U CN201721219755 U CN 201721219755U CN 207230133 U CN207230133 U CN 207230133U
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Abstract
A kind of rotor-type oil pump for reducing noise provided by the utility model, it is related to machine oil pump technical field, the rotor-type oil pump includes the pump housing, the outer rotor being arranged on the pump housing, the internal rotor being sleeved in outer rotor cavity, drive the drive shaft and the pump cover supporting with the pump housing that internal rotor rotates, the pump housing on pump cover with offering oil suction chamber and oil outlet chamber, the unequal working chamber of several volumes is formed between outer rotor and internal rotor, fluid in oil suction chamber is flowed into oil outlet chamber by working chamber, on the pump housing, the underface that outer rotor is engaged with internal rotor offers oil groove, oil groove is connected with the tail end of oil outlet chamber.The oil groove of the utility model can reduce the maximum transient pressure of inner and outer rotors engagement place, reduce lubricating oil pump noise.
Description
Technical field
Machine oil pump technical field is the utility model is related to, especially a kind of rotor-type oil pump.
Background technology
Rotor-type oil pump, as the key components and parts of engine lubrication system, its mainly by the pump housing, internal rotor, outer turn
Son and several parts compositions such as pump cover, rotor-type oil pump have the advantages that notable, its is compact-sized, and appearance and size is small, light-weight,
Oil suction vacuum is larger, and pump oil amount is big, and fuel feeding uniformity is good, and cost is low, therefore is widely used on medium and small engine.Phase
Than gear type oil pump, the overall operation noise of rotor-type oil pump is less than normal, but it continual can exist in the operating condition
It is a kind of compared with harsh noise, when the main period of right time of this noise is rotor intermeshing, because in rotor from fuel-displaced
During chamber is rotated toward oil inlet cavity direction, a small amount of fluid is had in oil outlet chamber oil suction chamber is taken to by rotor, and rotor phase at this time
Mutually engagement, the volume of working chamber is extremely small, and without pressure release passage on the pump housing inner surface of the working chamber face, therefore a small amount of oil
Just moment is enclosed between working chamber and the pump housing inner surface liquid, and oil pressure can become very high, but to a certain extent, fluid
Oil pressure and flow pulsation are bigger, and the chatter of working chamber inner fluid, fluid are between the impulsive sound and inner and outer rotors of inner and outer rotors
Strike note is also bigger, namely this kind of noise is also bigger.Therefore, necessarily can be again into one if oil pressure herein can be reduced
Step reduces noise during rotor-type oil pump work.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of rotor-type oil pump for reducing noise.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution：Including the pump housing, outer rotor, interior turn
Son, drive shaft and pump cover, the pump housing with offering oil suction chamber and oil outlet chamber on pump cover, on the pump housing, outer rotor with it is interior
The underface of rotor engagement offers oil groove, and the oil groove is connected with the tail end of the oil outlet chamber of the pump housing.
Further, on the pump cover, the surface that outer rotor is engaged with internal rotor also offers oil groove, on the pump cover
Oil groove connected with the tail end of the oil outlet chamber on pump cover.
Further, the oil groove is rectangular recess.
Alternatively, the oil groove is triangular groove.
Yet further, 1/3 of the fluid circulation bore of the oil groove no more than oil outlet chamber fluid circulation bore.
Preferably, the fluid circulation bore of the oil groove is the 1/4 of oil outlet chamber fluid circulation bore.
The beneficial effects of the utility model are：A kind of rotor-type oil pump for reducing noise, on its pump housing, inside and outside turn
Oil groove is offered immediately below sub- engagement place, and the oil groove is connected with oil outlet chamber tail end so that the part of inner and outer rotors engagement place
Fluid can be discharged from oil groove in time, can reduce the maximum transient pressure of fluid herein, reduce chatter, the impulsive sound of fluid
And the strike note between rotor, that is, reduce the noise of lubricating oil pump.At the same time, oil groove can be also reduced between lubricating oil pump working chamber
Pressure differential, can effectively prevent that rotor and drive shaft extrude in rotation process toward one side caused by pressure imbalance, cause to turn
Sub- chamber and axis hole eccentric wear, increases lubricating oil pump leakage rate, influences lubricating oil pump durability, furthermore, it can also avoid axis hole and rotor chamber
Lubricating oil pump abnormal sound caused by eccentric wear, mitigates drive shaft rocking in motion process, reduces the noise of chain drive part.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment（For ease of understanding internal structure, presented in this figure
It is the outer rotor under pellucidity）；
Fig. 2 is the internal structure schematic diagram of the utility model embodiment.
Reference numeral is：
1 --- the pump housing 101 --- oil suction chamber 102 --- oil outlet chamber
103 --- oil groove 2 --- outer rotor 3 --- internal rotors
4 --- drive shaft A --- working chambers.
Embodiment
For the ease of the understanding of those skilled in the art, the utility model is made with reference to embodiment and attached drawing further
Explanation, the content that embodiment refers to not is restriction to the utility model.
In the description of the utility model, it is to be understood that term " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom ", " interior ", " outer " be based on orientation shown in the drawings or
Position relationship, is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified device or member
Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
, it is necessary to which explanation, unless otherwise prescribed and limits, term " installation ", " phase in the description of the utility model
Even ", " connection " should be interpreted broadly, for example, it may be the company inside mechanical connection or electrical connection or two elements
It is logical, it can be directly connected, can also be indirectly connected by intermediary, for the ordinary skill in the art, can
To understand the concrete meaning of the term as the case may be.
As shown in Figure 1, a kind of rotor-type oil pump for reducing noise, including the pump housing 1, outer rotor 2, internal rotor 3, driving
Axis 4 and the pump cover supporting with the pump housing 1, the pump cover are oppositely arranged on the top of the pump housing 1 and both centres and offer a closing
Rotor chamber, the outer rotor 2 is sleeved on the outside of internal rotor 3 and both are arranged in rotor chamber, and the drive shaft 4 passes through the pump housing 1
It is inserted into internal rotor 3, the internal rotor 3 is interference fitted with drive shaft 4, and the internal rotor 3 rotates under the driving of drive shaft 4,
Oil suction chamber 101 and oil outlet chamber 102 are offered on the pump housing 1 and pump cover, on the oil suction chamber 101 and the pump housing 1 on the pump cover
Oil suction chamber 101 be distributed in 2 both sides of outer rotor in a manner of symmetrical, the oil outlet chamber 102 on the pump cover with the pump housing 1
Oil outlet chamber 102 is distributed in 2 both sides of outer rotor in a manner of symmetrical, the oil suction chamber 101 on the pump cover with the pump housing 1
Oil suction chamber 101 is communicated with same oil inlet, and the oil outlet chamber 102 on the pump cover is communicated with same with the oil outlet chamber 102 on the pump housing 1
Oil outlet, forms the unequal working chamber A of several volumes, the wherein work of volume minimum between the outer rotor 2 and internal rotor 3
Make chamber A（That is the chamber of outer rotor 2 and the intermeshing composition of internal rotor 3）101 head end of face oil suction chamber and 102 tail end of oil outlet chamber
Centre, the fluid in the oil suction chamber 101 flow clockwise around drive shaft 4, are flowed into by working chamber A in oil outlet chamber 102,
Oil groove 103 is additionally provided with the pump housing 1, the oil groove 103 is located at the underface that outer rotor 2 is engaged with internal rotor 3, and the oil groove
103 connection 102 tail ends of oil outlet chamber.
The rotor-type oil pump for reducing noise that the above embodiment provides, when under drive of the outer rotor 3 in internal rotor 2
Together around drive shaft 4 rotationally clockwise when, the volume of the working chamber A between rotor constantly changes, in 101 side of oil suction chamber,
Since outer rotor 2 is slowly disengaged with internal rotor 3, the volume of working chamber A gradually increases, and vacuum is produced in working chamber A, true
Fluid is from oil suction chamber 101 under the action of suction power（The fluid of oil suction chamber 101 comes from oil inlet）It is inhaled into working chamber A, rotor
Continue to rotate, fluid is brought to 102 side of oil outlet chamber, and at this moment, rotor slowly enters engagement, makes the volume of working chamber A slowly subtract
Small, oil pressure rise, fluid is extruded between cog and gone out through oil outlet chamber 102, oil outlet force feed.Finally, as rotor is further continued for revolving
Turn, a small amount of fluid is had in oil outlet chamber 102 oil suction chamber 101 is taken to by rotor, and outer rotor 2 is intermeshed with internal rotor 3 at this time,
The volume of working chamber A is extremely small, in the rotor-type oil pump of the prior art, nothing on the pump housing inner surface of working chamber A faces
Pressure release passage, therefore just moment is enclosed between working chamber A and pump housing inner surface a small amount of fluid, oil pressure can become very high,
And rotor-type oil pump provided by the utility model, on the pump housing 1, outer rotor 2 opens up with 3 intermeshing underface of internal rotor
Oil groove 103, and oil groove 103 connects 102 tail end of oil outlet chamber, and a part of fluid for being enclosed in rotor between cog can be made to be let out from oil groove 103
Go out, flow into oil outlet chamber 102, this greatly reduces the maximum transient pressure of fluid at this, reduce chatter, the impulsive sound of fluid
And the strike note between rotor, greatly reduce noise during lubricating oil pump operating.At the same time, oil groove 103 can also reduce lubricating oil pump
Pressure differential between working chamber A, can effectively prevent that internal rotor 3, outer rotor 2 and drive shaft 4 are turning caused by pressure imbalance
Extruded during dynamic toward one side, cause rotor chamber and axis hole（Internal rotor 3 installs the hole of drive shaft 4）Eccentric wear, increase lubricating oil pump are let out
Leakage quantity, influences lubricating oil pump durability, furthermore, lubricating oil pump abnormal sound caused by axis hole and the eccentric wear of rotor chamber can be also avoided, mitigates and drives
Moving axis 4 is rocked motion process, reduces the noise of chain drive part.
Further, oil groove 103 is also opened up on the pump cover, the oil groove 103 on the pump cover connects pump cover oil outlet chamber 102
Tail end, the oil groove 103 on the pump cover is distributed in 2 liang of outer rotor with the oil groove 103 on the pump housing 1 in a manner of symmetrical
Side.Consequently, it is possible to outer rotor 2 has pressure release passage with 3 intermeshing both sides of internal rotor so that temporary closure is in rotor between cog
A part of fluid can both be released from the oil groove 103 of the pump housing 1, in the oil outlet chamber 102 that flows into the pump housing 1, can also be from the oil groove of pump cover
103 release, flow into the oil outlet chamber 102 of pump cover, therefore can further reduce noise when lubricating oil pump operates.
It is as shown in the table, three-dimensional digital-to-analogue CFD simulation analysis are used as rotor-type oil pump P3 moulds provided by the utility model
The rotor-type oil pump P4 models that type and the prior art provide do the data analysis of performance prediction and pressure distribution, it is necessary to explanation
It is that the revolution speeds of two models is that 5556rpm, outlet pressure are that 450kpa, theoretical delivery are 48.06L/min.
From the data of upper table, the prior art for the utility model contrast P4 models that P3 models represent, volume flow
Efficiency and gross efficiency have increased slightly, and average power consumption is slightly decreased, and 102 beginning pressure of oil outlet chamber is without significant change, oil outlet chamber 102
Tail end pressure but reduces 1Mpa, and from analysis, the pressure differential inside working chamber A also necessarily reduces：
P3 models：1.3-1.25=0.05Mpa
P4 models：2.3-1.25=1.05Mpa
This further illustrates rotor-type oil pump provided by the utility model can substantially reduce outer rotor 2 and internal rotor 3
The pressure of engagement place, reduces the pressure differential between working chamber A.
Further, the oil groove 103 is rectangular recess or triangle（Its apex angle is directed toward oil suction chamber 101）Groove.
Further, since the amount of 3 entrained oil liquid of outer rotor 2 and internal rotor is fewer, to avoid oil groove 103 from venting
Excessive pressure, the fluid circulation bore of the oil groove 103 should not be too big, and bore is too small to make for the fluid circulation of oil groove 103
Pressure release effect unobvious, therefore also should not be too small, the fluid circulation bore of oil groove 103 not should be greater than 102 tail end of pumping cavity herein
Fluid circulation bore 1/3.
Preferably, the fluid circulation bore of oil groove 103 is the 1/4 of the fluid circulation bore of 102 tail end of pumping cavity.
Above-described embodiment is the preferable implementation of the utility model, and in addition, the utility model can be with other sides
Formula is realized, any on the premise of the technical program design is not departed from obviously to replace in the protection model of the utility model
Within enclosing.
In order to allow those of ordinary skill in the art more easily understand the utility model relative to the prior art improvement it
Place, some attached drawings of the utility model and description have been simplified, and for the sake of clarity, present specification is omitted one
A little other elements, those of ordinary skill in the art should be aware that these elements omitted also may make up the interior of the utility model
Hold.
Claims (6)
1. a kind of rotor-type oil pump for reducing noise, including the pump housing（1）, outer rotor（2）, internal rotor（3）, drive shaft（4）
And pump cover, the pump housing（1）With offering oil suction chamber on pump cover（101）And oil outlet chamber（102）, it is characterised in that：The pump
Body（1）Upper, outer rotor（2）With internal rotor（3）Oil groove is offered immediately below engagement（103）, the oil groove（103）With oil outlet chamber
（102）Tail end connection.
2. the rotor-type oil pump according to claim 1 for reducing noise, it is characterised in that：On the pump cover, outer turn
Son（2）With internal rotor（3）The surface of engagement also offers oil groove（103）, the oil groove on the pump cover（103）With on pump cover
Oil outlet chamber（102）Tail end connection.
3. the rotor-type oil pump according to claim 2 for reducing noise, it is characterised in that：The oil groove（103）For
Rectangular recess.
4. the rotor-type oil pump according to claim 3 for reducing noise, it is characterised in that：The oil groove（103）For
Triangular groove.
5. the rotor-type oil pump according to claim 4 for reducing noise, it is characterised in that：The oil groove（103）'s
Fluid circulation bore is not more than oil outlet chamber（102）The 1/3 of fluid circulation bore.
6. the rotor-type oil pump according to claim 5 for reducing noise, it is characterised in that：The oil groove（103）'s
Fluid circulation bore is oil outlet chamber（102）The 1/4 of fluid circulation bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219755.6U CN207230133U (en) | 2017-09-22 | 2017-09-22 | A kind of rotor-type oil pump for reducing noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219755.6U CN207230133U (en) | 2017-09-22 | 2017-09-22 | A kind of rotor-type oil pump for reducing noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207230133U true CN207230133U (en) | 2018-04-13 |
Family
ID=61863317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721219755.6U Active CN207230133U (en) | 2017-09-22 | 2017-09-22 | A kind of rotor-type oil pump for reducing noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207230133U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514538A (en) * | 2017-09-22 | 2017-12-26 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump for reducing noise |
| CN110566796A (en) * | 2019-08-30 | 2019-12-13 | 安徽江淮汽车集团股份有限公司 | Oil pump, engine lubrication system and automobile |
| CN113669612A (en) * | 2021-08-13 | 2021-11-19 | 湖南机油泵股份有限公司 | Transmission oil pump capable of preventing outer rotor from being stuck |
-
2017
- 2017-09-22 CN CN201721219755.6U patent/CN207230133U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514538A (en) * | 2017-09-22 | 2017-12-26 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump for reducing noise |
| CN110566796A (en) * | 2019-08-30 | 2019-12-13 | 安徽江淮汽车集团股份有限公司 | Oil pump, engine lubrication system and automobile |
| CN113669612A (en) * | 2021-08-13 | 2021-11-19 | 湖南机油泵股份有限公司 | Transmission oil pump capable of preventing outer rotor from being stuck |
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