CN201078455Y - Oil pump gear - Google Patents
Oil pump gear Download PDFInfo
- Publication number
- CN201078455Y CN201078455Y CNU2007200430062U CN200720043006U CN201078455Y CN 201078455 Y CN201078455 Y CN 201078455Y CN U2007200430062 U CNU2007200430062 U CN U2007200430062U CN 200720043006 U CN200720043006 U CN 200720043006U CN 201078455 Y CN201078455 Y CN 201078455Y
- Authority
- CN
- China
- Prior art keywords
- gear
- oil pump
- gear shaft
- journal
- adjacent
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an oil pump gear, which comprises a gear and a gear shaft. A bearing is arranged at the adjacent sides of the gear shaft in adjacent to the gear. A journal of the bearing at the both sides of the gear shaft in adjacent to the gear is a conical bearing journal, and the diameter of the butt of the conical bearing journal closer to the gear end is small. By using the oil pump gear, the abrasion of the elements can be lightened, the noise can be reduced, the leakage of the medium can be decreased, the working efficiency can be efficiently ensured and the service life of the gear pump can be prolonged.
Description
Technical field
The utility model relates to hydraulic machinery, relates in particular to a kind of gear shaft.
Background technique
Gear pump is to be used for a critical component of conveyance fluid medium in the machinery hydraulic system, and it relies on the high speed rotary motion fed sheet of a media of a pair of oil pump gear.When a pair of oil pump gear is made the high speed engagement driving in the pump housing, along with contact points changes, the oil sucting cavity swept volume increases in the meshing zone, and the pressure in space reduces and the generation parital vacuum, oil in the oil sump enters the inlet port in the oil pump low pressure area under atmospheric effect, produce the oil suction effect; In pumping cavity, because the oil pump gear teeth progress into engagement, its swept volume reduces, and produces the oil effect of pressing to pressure piping.The gear shaft of oil pump gear is cylindric in the prior art, and as shown in Figure 1, oil pump gear comprises gear 1 and gear shaft, and described gear shaft is cylindric, but the both sides running in bearings 2 adjacent on the described gear shaft with gear 1.Oil pump gear is the operation element of gear pump most critical, and by the gear engagement effect, gear pump could be exported the required certain pressure and the medium of flow.Because oil pump gear is different with general mechanical drive gear job specification requirement, its sideshake and bottom clearance are all very little during the oil pump gear engagement, the pressure medium of output is higher again, its suffered load that interacts is very big, gear shaft just produces deflection deformation during work, pressure medium is high more, and distortion is just big more.Because distortion causes gear shaft and bearing supporting place mated condition to worsen, impel the aggravation of gear pump component abrasion, generation abnormal sound, dielectric leakage, pressure to descend, utilization efficiency reduces, and shortens operating life.The continuous rotation of gear simultaneously, what the alternating stress of generation can continue acts on the gear shaft, and the long-term work meeting makes material production fatigue and causes the axle journal fracture to cause gear pump to be scrapped.
Summary of the invention
The utility model provides a kind of can alleviate component abrasion, reduce noise, reduce dielectric leakage, guarantee working efficiency effectively, prolong the oil pump gear of gear pump operating life.
The utility model is achieved by the following technical solution: oil pump gear, comprise gear and gear shaft, the both sides running in bearings adjacent on the described gear shaft with gear, the axle journal of the running in bearings of adjacent both sides with gear is coniform bearing journal on the described gear shaft, and the coniform bearing journal end face diameter of contiguous gear end is little.
The coniform bearing journal end face diameter of described contiguous gear end and Outside diameter footpath are poor to be 0.05mm.
The utility model changes into cylindric axle journal coniform, aspect quality of fit, although axle journal changes into coniform, but because Outside diameter and original cylindric axle journal consistent size, gear shaft and bearing supporting place mating reaction size constancy, quality of fit also is consistent with original cylindric axle journal quality of fit like this.Deflection deformation owing to stressed generation when coniform axle journal can make gear shaft work is effectively compensated, this be because the distortion that the stressed back of gear shaft is produced that pointed journal is cooperated with bearing supporting place is more identical, the supporting fitting surface strengthens, pressure reduces relatively, alleviated force-bearing situation, working state is greatly improved, thereby alleviates component abrasion, reduces noise, reduces dielectric leakage, guarantees working efficiency effectively, prolongs the gear pump operating life; Same allow the stressed back of gear shaft to produce micro-deformation owing to improve the back, the alternating stress that the gear rotation produces will obtain partly discharging, and stops the axle journal this critical defect that ruptures.
Description of drawings
Fig. 1 is the structural representation of prior art oil pump gear
Fig. 2 is the utility model embodiment's a structural representation
Sequence number is among the figure: 1, gear, 2, bearing, 3, bearing journal.
Embodiment
A kind of oil pump gear, comprise gear 1 and gear shaft, both sides adjacent with gear 1 on the described gear shaft are equipped with bearing 2, the axle journal 3 of running in bearings 2 is coniform bearing journal on the described gear shaft, the end face diameter of the coniform bearing journal 3 of contiguous gear 1 end is little, and the end face diameter of the coniform bearing journal 3 of contiguous gear 1 end and Outside diameter footpath are poor to be 0.05mm.
Claims (2)
1. oil pump gear, comprise gear 1 and gear shaft, the both sides running in bearings 2 adjacent on the described gear shaft with gear 1, it is characterized in that: the axle journal 3 with gear 1 adjacent both sides running in bearings 2 on the described gear shaft is coniform bearing journal, and the coniform bearing journal end face diameter of contiguous gear 1 end is little.
2. oil pump gear according to claim 1 is characterized in that: the coniform bearing journal end face diameter of described contiguous gear 1 end and Outside diameter footpath are poor to be 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200430062U CN201078455Y (en) | 2007-08-07 | 2007-08-07 | Oil pump gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200430062U CN201078455Y (en) | 2007-08-07 | 2007-08-07 | Oil pump gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201078455Y true CN201078455Y (en) | 2008-06-25 |
Family
ID=39570517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200430062U Expired - Fee Related CN201078455Y (en) | 2007-08-07 | 2007-08-07 | Oil pump gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201078455Y (en) |
-
2007
- 2007-08-07 CN CNU2007200430062U patent/CN201078455Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20100807 |