CN207920847U - A kind of oil pump denoising structure - Google PatentsA kind of oil pump denoising structure Download PDF
- Publication number
- 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
- Prior art keywords
- oil pump
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- 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.)
- 206010008469 Chest discomfort Diseases 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 12
- 230000003628 erosive Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 49
- 239000010720 hydraulic oil Substances 0.000 description 16
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001425800 Pipa Species 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004301 light adaptation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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.
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.
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.
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.
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|
|Publication Number||Publication Date|
|CN207920847U true CN207920847U (en)||2018-09-28|
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)
|CN (1)||CN207920847U (en)|
- 2018-02-13 CN CN201820253637.5U patent/CN207920847U/en active Active
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