CN207920847U - A kind of oil pump denoising structure - Google Patents
A kind of oil pump denoising structure Download PDFInfo
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- CN207920847U CN207920847U CN201820253637.5U CN201820253637U CN207920847U CN 207920847 U CN207920847 U CN 207920847U CN 201820253637 U CN201820253637 U CN 201820253637U CN 207920847 U CN207920847 U CN 207920847U
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- pump
- oil pump
- oil
- gear
- crescent
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Abstract
The utility model discloses a kind of oil pump denoising structures, include on the crescent spacer in the pump housing of oil pump, the outer rotor with internal tooth and the gear with external tooth are equipped in the pump housing, gear eccentricity is set in outer rotor and the two engages, outer rotor is sleeved on outside crescent spacer, for crescent spacer while between high pressure chest and low pressure chamber in oil pump between outer rotor and gear, crescent spacer both ends are equipped with round and smooth chamfering, and crescent spacer is equipped with corner cut notch close to one end of low pressure chamber.The round and smooth chamfering in the end of crescent spacer, corner cut notch can reduce bubble generation in the utility model, to mitigate a series of caused harm of cavitation erosion, improve the noise problem of operation of oil pump.The utility model is simple in structure, easy to implement.
Description
Technical field
The utility model is related to a kind of structures of oil pump, more specifically, it relates to a kind of oil pump denoising structure.
Background technology
When existing operation of oil pump due between high and low pressure chamber oil circuit it is unsmooth, hydraulic oil will produce greatly in oil pump oil pocket
Bubble is measured, cavitation is caused, cavitation is extremely harmful for oil pump, and harm includes mainly generating vibration and noise, reducing
The performance of pump destroys the several respects such as flow passage components.Wherein, cavitation erosion, which generates vibration and the mechanism of noise, is：When bubble is crumbled and fall, liquid
Particle is hit mutually, while also impinging on metal surface, generates the noise of various frequencies, is had " pipa " in audible pump when serious
Explosive sound, while causing unit vibration.Currently, for the main application of oil pump --- automobile, construction equipment and production are set
Standby etc., consumer, manufacturing enterprise propose higher mute requirement, therefore, cavitation erosion how are prevented in operation of oil pump, reduces and makes an uproar
Sound becomes the project studied energetically in the industry.Oil channel structures have much relations in the generation of bubble and oil pocket in oil pump oil pocket, wherein
The shape of crescent spacer is exactly one of influence factor.The usual cambered surface of crescent spacer in existing oil pump is complete, and both ends end
Face is straight, this can make hydraulic oil from high pressure chest into low pressure chamber flow process by it is larger shock and flow resistance is uprushed, to produce
Raw a large amount of bubbles.And the hydraulic oil of crescent spacer is flowed through to pressure jump when low pressure chamber transition, hydraulic oil can flow back, because
And it also will produce bubble.But the production of current oil pump researches and develops unit and is unaware that this problem, not improvement crescent spacer
Structure is as anti-cavitation, the approach of noise-reducing.The patent of invention of Publication No. CN102518588A is open on June 27th, 2012
A kind of crescent gear pump, including pinion gear, gear wheel, crescent spacer, oil sucting cavity, pumping cavity, oil input channel, oil road,
The pinion gear is driving gear, and the gear wheel is driven gear, and two are involute gear, are deposited between two gears
In an eccentricity, the crescent spacer is between pinion gear and gear wheel, and the oil sucting cavity, volume is with size
Gear constantly exits engagement and volume increases, the pumping cavity, and volume engages and body as big pinion gear constantly enters
Product increases, and the oil input channel is connected with oil sucting cavity, and the oil road is connected with pumping cavity.In the crescent gear pump
In, crescent spacer is still traditional structure, is not improved, thus does not overcome noise problem caused by cavitation erosion.
Utility model content
For existing oil pump because of fault of construction, hydraulic oil will produce a large amount of bubbles in oil pump oil pocket when work, cause to cavitate
Phenomenon makes oil pump generate vibration and noise, and to overcome this defect, it is more reasonable that the utility model provides a kind of structure, can
Mitigate cavitation erosion, improves the oil pump denoising structure of noise problem.
The technical solution of the utility model is：A kind of oil pump denoising structure includes the crescent in the pump housing of oil pump
On partition board, the outer rotor with internal tooth and the gear with external tooth are equipped in the pump housing, gear eccentricity is set in outer rotor and the two is nibbled
It closes, outer rotor is sleeved on outside crescent spacer, and crescent spacer is between outer rotor and gear while the high pressure chest in oil pump
Between low pressure chamber, crescent spacer both ends are equipped with round and smooth chamfering, and crescent spacer is lacked close to one end of low pressure chamber equipped with corner cut
Mouthful.The utility model improves crescent spacer, eliminates the straight end face of crescent spacer, and such hydraulic oil is from height
Press chamber into low pressure chamber flow process, the round and smooth chamfering in end of crescent spacer can generate the effect of water conservancy diversion hydraulic oil, avoid flowing
Dynamic hydraulic oil is formed surge by larger frontal impact, is generated to reduce bubble.On the other hand, due in crescent
Partition board is provided with corner cut notch close to one end of low pressure chamber, flows through the hydraulic oil of crescent spacer to can be carried when low pressure chamber transition
It is preceding to be gradually connected to low pressure chamber, avoid the pressure jump of hydraulic oil from reducing, thus the bubble that hydraulic oil reflux generates can be slowly
Ablation improves the noise problem of operation of oil pump to mitigate a series of caused harm of cavitation erosion.
Preferably, the pump housing is equipped with pump cover, the pump housing is equipped with pump cover installation end, and pump cover is bonded and leads to pump cover installation end
It crosses and is bolted, in chamber made of outer rotor is located at the pump housing, pump cover encloses, gear is rotatably connected on pump cover.The pump housing, pump cover
Complete oil pump structure is formed after combination, can provide installation space and support construction for outer rotor and gear.
Preferably, pump cover installation end is equipped with lateral screens slot and longitudinal screens slot, pump cover respectively with lateral screens slot
It is clamped with longitudinal screens slot.Lateral screens slot and longitudinal screens slot can provide coarse positioning structure, be quickly fixed convenient for pump cover installation
Position.
Preferably, the surface of the pump housing and pump cover is respectively equipped with antirust coat.The working environment of oil pump is more severe, antirust coat
Preferable protection can be provided, the pump housing and pump cover Accelerated corrosion are avoided.
The utility model has the beneficial effects that：
Mitigate cavitation erosion in operation of oil pump, improves noise problem.The end of crescent spacer is round and smooth in the utility model
Angle, corner cut notch can reduce bubble generation, and to mitigate a series of caused harm of cavitation erosion, the noise for improving operation of oil pump is asked
Topic.
It is simple in structure, it is easy to implement.The utility model has made structure improvement on the basis of existing crescent spacer, is transformed into
This is low, is easy to implement.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the utility model；
Fig. 2 is a kind of structural schematic diagram using the oil pump of the utility model；
Fig. 3 is the fit structure schematic diagram using outer rotor, gear, crescent spacer in the oil pump of the utility model.
In figure, the 1- pump housings, 2- crescent spacers, 3- outer rotors, 4- gears, 5- high pressure chests, 6- low pressure chambers, 7- it is round and smooth fall
Angle, 8- corner cut notches, 9- pump covers, 10- pump cover installation ends, 11- transverse direction screens slots, the longitudinal directions 12- screens slot, 13- axis holes, 14- chambers
Room, 15- oil inlets, 16- oil outlets.
Specific implementation mode
The utility model is described in further detail for specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of oil pump denoising structure includes the crescent spacer 2 in the pump housing 1 of oil pump
On, the outer rotor 3 with internal tooth and the gear with external tooth 4 are equipped in the pump housing 1,4 eccentric setting of gear is in outer rotor 3 and the two is nibbled
It closes, outer rotor 3 is sleeved on outside crescent spacer 2, and crescent spacer 2 is positioned at outer rotor 3 and gear 4 between and is in the high pressure of oil pump
Between chamber 5 and low pressure chamber 6,2 both ends of crescent spacer are equipped with round and smooth chamfering 7, and crescent spacer 2 is set close to one end of low pressure chamber 6
There is corner cut notch 8.The pump housing 1 is equipped with pump cover 9, and the pump housing 1 is equipped with pump cover installation end 10, and pump cover 9 is bonded with pump cover installation end 10
And be bolted, in chamber 14 made of outer rotor 3 is located at the pump housing 1, pump cover 9 encloses, pump cover 9 is equipped with axis hole 13, tooth
The axis of wheel 4 is rotatably assorted with axis hole adaptation and connect, and gear 4 is rotatably connected on pump cover 9.Pump cover installation end 10 is equipped with laterally
Screens slot 11 and longitudinal screens slot 12, pump cover 9 are clamped with lateral screens slot 11 and longitudinal screens slot 12 respectively.The pump housing 1 and pump cover 9
Surface be respectively equipped with antirust coat.
When operation of oil pump, gear 4 engages rotation with outer rotor 3, and high pressure chest 5 is formed in the region of corresponding oil inlet 15,
The region of corresponding oil outlet 16 forms low pressure chamber 6, hydraulic oil from high pressure chest 5 into 6 flow process of low pressure chamber, crescent spacer
The round and smooth chamfering 8 of 2 ends can generate the effect of water conservancy diversion hydraulic oil, avoid flowing hydraulic oil by larger frontal impact shape
At surge, generated to reduce bubble.On the other hand, due to being provided with corner cut close to one end of low pressure chamber 6 in crescent spacer 2
Notch 8, the hydraulic oil for flowing through crescent spacer 2 can be gradually connected to low pressure chamber 6 in advance to when 6 transition of low pressure chamber, avoid liquid
The pressure jump of pressure oil reduces, and the oil circuit between high pressure chest 5 and low pressure chamber 6 is more smoothly, thus the bubble that hydraulic oil reflux generates
It can slowly melt, to mitigate a series of caused harm of cavitation erosion, improve the noise problem of operation of oil pump.
Claims (4)
1. a kind of oil pump denoising structure includes the pump housing set on oil pump（1）Interior crescent spacer（2）On, the pump housing（1）Inside it is equipped with
Outer rotor with internal tooth（3）With the gear with external tooth（4）, gear（4）Eccentric setting is in outer rotor（3）Interior and the two engages, outside
Rotor（3）It is sleeved on crescent spacer（2）Outside, crescent spacer（2）Positioned at outer rotor（3）And gear（4）Between and be in oil pump
High pressure chest（5）And low pressure chamber（6）Between, it is characterized in that crescent spacer（2）Both ends are equipped with round and smooth chamfering（7）, crescent every
Plate（2）Close to low pressure chamber（6）One end be equipped with corner cut notch（8）.
2. oil pump denoising structure according to claim 1, it is characterized in that the pump housing（1）It is equipped with pump cover（9）, the pump housing（1）On
Equipped with pump cover installation end（10）, pump cover（9）With pump cover installation end（10）It is bonded and is bolted, outer rotor（3）Positioned at pump
Body（1）, pump cover（9）In chamber made of enclosing, gear（4）It is rotatably connected on pump cover（9）On.
3. oil pump denoising structure according to claim 2, it is characterized in that pump cover installation end（10）It is equipped with lateral screens slot
（11）With longitudinal screens slot（12）, pump cover（9）Respectively with lateral screens slot（11）With longitudinal screens slot（12）Clamping.
4. oil pump denoising structure according to claim 1 or 2 or 3, it is characterized in that the pump housing（1）And pump cover（9）Surface point
It She You not antirust coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820253637.5U CN207920847U (en) | 2018-02-13 | 2018-02-13 | A kind of oil pump denoising structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820253637.5U CN207920847U (en) | 2018-02-13 | 2018-02-13 | A kind of oil pump denoising structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207920847U true CN207920847U (en) | 2018-09-28 |
Family
ID=63601518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820253637.5U Active CN207920847U (en) | 2018-02-13 | 2018-02-13 | A kind of oil pump denoising structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207920847U (en) |
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2018
- 2018-02-13 CN CN201820253637.5U patent/CN207920847U/en active Active
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