CN103277308A - Large gearbox powder metallurgy oil pump rotor - Google Patents
Large gearbox powder metallurgy oil pump rotor Download PDFInfo
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- CN103277308A CN103277308A CN2013102053371A CN201310205337A CN103277308A CN 103277308 A CN103277308 A CN 103277308A CN 2013102053371 A CN2013102053371 A CN 2013102053371A CN 201310205337 A CN201310205337 A CN 201310205337A CN 103277308 A CN103277308 A CN 103277308A
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Abstract
The invention discloses a large gearbox powder metallurgy oil pump rotor. The oil pump rotor is an elliptical trochoid rotor and comprises the following powder metallurgy in percentage by weight: 0.15-0.9 percent of stearic acid boron B (C16H35O2)3, 0.3-0.6 percent of graphite powder, 1.6-2.0 percent of Cu powder, 0.55-0.65 percent of zinc stearate and the balance of iron powder. Special materials are adopted to meet the low hardness required by a powder metallurgy rotor production process to ensure the finishing performance, the smooth finish of a working surface, the high strength and the high wearability so that the service life of the rotor is ensured. An elliptical cycloid design is adopted to increase the outer rotor wall thickness, so that the crushing strength of the rotor is greatly increased.
Description
Technical field
The present invention relates to field of powder metallurgy, be specifically related to a kind of large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor.
Background technique
Forwarding motor is a kind of very important logistics mode, and at present domestic have 1,600 ten thousand trucies of surpassing to be active in a line.And truck is shifted gears in transportation process frequently, and the impact of road pavement is very big; In the long-distance transport process, driver's labor intensity is very big.For the impact that alleviates the lorry road pavement with reduce Operating Complexity to improve safety coefficient, automatic transmission case being applied on lorry occupied 30% market abroad.
As the drive unit of the automatic parameter case of truck, the gear box oil pump rotor has born abominable operating mode, simultaneously for satisfying and the requirement of car load with the life-span, precision and the material property of product has been proposed very high requirement.And powder metallurgy is highly suitable for producing truck oil pump for automatic transmission rotor as a kind of technology of producing high-precision part in enormous quantities.
Because of the gear box oil pump root diameter between 150-180mm, be the 2-3 of lubricating pump of automobile root diameter doubly; Running pressure is between 1.2Mpa ~ 2.0Mpa, and the 3-5 of rotor of engine oil pump doubly.At the same time, need satisfy running clearance and the pressure surge of trochoid rotor.Under so abominable working condition, powdered metallurgical material and the technology of usefulness can't satisfy the use needs usually.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, provide a kind of finishing performance good, running face is highly polished, intensity height, wear resistance height, the large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor of long service life.
For achieving the above object, technological scheme of the present invention provides a kind of large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor, and the cycloid of described oil hydraulic-pump rotor is set to oval trochoid.
Wherein, optimized technical scheme is, the major axis of described oval trochoid is 28mm, and minor axis is 16mm.
Wherein, optimized technical scheme is that the powdery components of its powder metallurgy oil hydraulic-pump rotor comprises by weight percentage: stearic acid boron (C
16H
35O
2)
3Be 0.15% ~ 0.9%; Plumbago is 0.3 ~ 0.6%; Copper (Cu) powder is 1.6% ~ 2.0%; Zine stearate is 0.55% ~ 0.65%; Iron powder is surplus.
Wherein, optimized technical scheme is that each constituent percetage by weight of described powdered metallurgical material comprises B (C
16H
35O
2)
3Be 0.7%; Plumbago is 0.45%; The Cu powder is 1.82%; Zine stearate is 0.60%; Iron powder is surplus.
Advantage of the present invention and beneficial effect are: the present invention under the prerequisite that guarantees discharge capacity, changes the external rotor rolling circle into major axis 28 by Ф 21, the ellipse of minor axis 16 by adopting oval trochoid design molded lines.Under equivalent weight, increased the 10mm minimum wall thickness (MINI W.), rotor conquassation collapsing force has been brought up to 160KN by 42KN.Rotor strength and rigidity have been promoted greatly.And adopt low melting point (80 ℃), the stearic acid boron (C of low decomposition temperature (180 ℃)
16H
35O
2)
3As B carry agent and iron powder, plumbago, copper powder, mix lubricant is pressed into part blank and sintering then.Make the pearlitic structrure of the better refinement material of boron, stop to generate bainite and martensite, make the sintered surface hardness of material be reduced to HRB65 ~ 75 by HRB90 ~ 100, tensile strength rises to 490Mpa by 420Mpa, ballistic work is increased to 14.2J by 6J, and wear resistance increases by 4.8 times.Than the external FN-0405 material that uses, finishing pressure is reduced to 380 tons by 760T, can save 150,000 yuan of Master Costs for per ten thousand, 6.5 ten thousand yuan of costs of equipment.
Description of drawings
Fig. 1 is the structural representation of oil hydraulic-pump rotor of the present invention;
Fig. 2 is the structural representation of the oil hydraulic-pump rotor of prior art.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples only are used for technological scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Embodiment 1
As shown in Figure 1, a kind of large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor, the cycloid of described oil hydraulic-pump rotor 1 is set to oval trochoid 2.
Embodiment 2
On embodiment 1 basis, the preferable technological scheme of the present invention also comprises, described external rotor rolling circle, and namely the major axis of oval trochoid is 28mm, minor axis is 16mm; Oil hydraulic-pump rotor 3 external rotor rolling circles 4 generally are designed to the circle that diameter is 21mm in the prior art, the present invention passes through the structural improvement of this oil hydraulic-pump rotor, make that minimum wall thickness (MINI W.) can increase 10mm at least under equivalent weight, as Fig. 1, shown in Figure 2, under equivalent weight, Fig. 1 is oval trochoid, wherein minimum wall thickness (MINI W.) A is 11.2mm, and Fig. 2 is circular trochoid, and minimum wall thickness (MINI W.) B is 9.5mm.
Embodiment 3
On embodiment 2 basis, the preferable technological scheme of the present invention comprises that also its composition comprises by weight percentage: stearic acid boron (C
16H
35O
2)
3Be 0.15% ~ 0.9%; Plumbago is 0.3 ~ 0.6%; Copper (Cu) powder is 1.6% ~ 2.0%; Zine stearate is 0.55% ~ 0.65%; Iron powder is surplus.
Embodiment 4
On embodiment 3 basis, the preferable technological scheme of the present invention comprises that also each constituent percetage by weight of described powdered metallurgical material comprises B (C
16H
35O
2)
3Be 0.7%; Plumbago is 0.45%; The Cu powder is 1.82%; Zine stearate is 0.60%; Iron powder is surplus.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor is characterized in that the cycloid of described oil hydraulic-pump rotor is set to oval trochoid.
2. large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor according to claim 1 is characterized in that the major axis of described oval trochoid is 28mm, and minor axis is 16mm.
3. large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor according to claim 1 and 2 is characterized in that the composition compositions in weight percentage of described powder metallurgy oil hydraulic-pump rotor comprises:
Stearic acid boron 0.15% ~ 0.9%;
Plumbago 0.3 ~ 0.6%;
Copper powder 1.6% ~ 2.0%;
Zine stearate 0.55% ~ 0.65%;
The iron powder surplus.
4. large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor according to claim 3 is characterized in that described composition comprises by weight percentage:
Stearic acid boron 0.7%;
Plumbago 0.45%;
Copper powder 1.82%;
Zine stearate 0.60%;
The iron powder surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205337.1A CN103277308B (en) | 2013-05-27 | 2013-05-27 | Large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205337.1A CN103277308B (en) | 2013-05-27 | 2013-05-27 | Large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103277308A true CN103277308A (en) | 2013-09-04 |
| CN103277308B CN103277308B (en) | 2015-12-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310205337.1A Active CN103277308B (en) | 2013-05-27 | 2013-05-27 | Large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650269A (en) * | 1992-07-30 | 1994-02-22 | Mitsubishi Materials Corp | Sintered/forged rotor for gear pump |
| CN102407333A (en) * | 2011-11-08 | 2012-04-11 | 益阳市俊淞汽车配件制造有限公司 | Powder metallurgy stator of car steering pump and production method thereof |
| CN202326230U (en) * | 2011-11-03 | 2012-07-11 | 莱州长和粉末冶金有限公司 | Powder metallurgy internal and external rotor assembly for oil pump |
| CN103089608A (en) * | 2011-11-08 | 2013-05-08 | 株式会社山田制作所 | Pump rotor |
-
2013
- 2013-05-27 CN CN201310205337.1A patent/CN103277308B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650269A (en) * | 1992-07-30 | 1994-02-22 | Mitsubishi Materials Corp | Sintered/forged rotor for gear pump |
| CN202326230U (en) * | 2011-11-03 | 2012-07-11 | 莱州长和粉末冶金有限公司 | Powder metallurgy internal and external rotor assembly for oil pump |
| CN102407333A (en) * | 2011-11-08 | 2012-04-11 | 益阳市俊淞汽车配件制造有限公司 | Powder metallurgy stator of car steering pump and production method thereof |
| CN103089608A (en) * | 2011-11-08 | 2013-05-08 | 株式会社山田制作所 | Pump rotor |
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|---|---|
| CN103277308B (en) | 2015-12-02 |
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Inventor after: Bao Lingyu Inventor before: Bao Ganfeng Inventor before: Long Bin |
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