CN103277308B - Large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor - Google Patents
Large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor Download PDFInfo
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- CN103277308B CN103277308B CN201310205337.1A CN201310205337A CN103277308B CN 103277308 B CN103277308 B CN 103277308B CN 201310205337 A CN201310205337 A CN 201310205337A CN 103277308 B CN103277308 B CN 103277308B
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Abstract
The invention discloses a kind of large-sized speed-changing case powder metallurgy oil hydraulic-pump rotor, described oil hydraulic-pump rotor is oval trochoid rotor, and its powder metallurgy 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, present invention employs proprietary material, and meet the low hardness of powder metallurgy rotor manufacturing technique requirent to ensure finishing performance and running face degree of finish, high strength and high wear resistance are to ensure rotor life; Have employed elliptic trochoid design and increase external rotor wall thickness, significantly improve rotor crushing strength.
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, at present domestic have be active in a line more than 1,600 ten thousand trucies.And truck is shifted gears frequently in transportation process, the impact of road pavement is very large; In long-distance transport process, driver's labor intensity is very large.For the impact that alleviates lorry road pavement with reduce Operating Complexity to improve safety coefficient, automatic transmission case being applied on lorry be external occupied 30% market.
As the drive unit of the automatic parameter case of truck, rotor of oil pump of gearbox bears severe operating mode, simultaneously for meeting with car load with the requirement in life-span, proposes very high requirement to the precision of product and material property.And powder metallurgy is as a kind of technique producing high-precision part in enormous quantities, be highly suitable for producing truck oil pump for automatic transmission rotor.
Because rotor of oil pump of gearbox diameter is between 150-180mm, be 2-3 times of lubricating pump of automobile root diameter; Operating pressure is between 1.2Mpa ~ 2.0Mpa, and the 3-5 of rotor of engine oil pump doubly.At the same time, the running clearance of demand fulfillment trochoid rotor and pressure surge.Under so severe working condition, usual powdered metallurgical material and technique cannot meet use needs.
Summary of the invention
The object of the invention is to overcome the defect existed in prior art, provide a kind of finishing performance good, running face is highly polished, and intensity is high, and wear resistance is high, 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 is to provide 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, preferred technological scheme is, the major axis of described oval trochoid is 28mm, and minor axis is 16mm.
Wherein, preferred technological scheme is, 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, preferred technological scheme is, each constituent percetage by weight of described powdered metallurgical material comprises B (C
16h
35o
2)
3be 0.7%; Plumbago is 0.45%; 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, by adopting oval trochoid design molded line, under the prerequisite ensureing discharge capacity, changes external rotor rolling circle into major axis 28 by Ф 21, the ellipse of minor axis 16.Under equivalent weight, add 10mm minimum wall thickness (MINI W.), rotor conquassation collapsing force is brought up to 160KN by 42KN.Improve rotor strength and rigidity greatly.And adopt low melting point (80 DEG C), the stearic acid boron (C of low decomposition temperature (180 DEG C)
16h
35o
2)
3carry agent and iron powder, plumbago, copper powder, mix lubricant as B, be then pressed into part blank and sinter.Make the pearlitic structrure of the better refiner material of boron, stop 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 used, finishing pressure reduces to 380 tons by 760T, can save Master Cost 150,000 yuan for every ten thousand, cost of equipment 6.5 ten thousand yuan.
Accompanying drawing explanation
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 for technological scheme of the present invention is clearly described, and can not limit the scope of the 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 the basis of embodiment 1, the present invention preferably technological scheme also comprises, described external rotor rolling circle, and namely the major axis of oval trochoid is 28mm, and minor axis is 16mm; In prior art, oil hydraulic-pump rotor 3 external rotor rolling circle 4 is generally designed to the circle that diameter is 21mm, the present invention passes through the structural improvement of this oil hydraulic-pump rotor, make minimum wall thickness (MINI W.) under equivalent weight at least can increase 10mm, as shown in Fig. 1, Fig. 2, under equivalent weight, Fig. 1 is oval trochoid, wherein minimum wall thickness (MINI W.) A is 11.2mm, Fig. 2 is circular trochoid, and minimum wall thickness (MINI W.) B is 9.5mm.
Embodiment 3
On the basis of embodiment 2, the present invention preferably technological scheme also comprises, and 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 the basis of embodiment 3, the present invention preferably technological scheme also comprises, and each constituent percetage by weight of described powdered metallurgical material comprises B (C
16h
35o
2)
3be 0.7%; Plumbago is 0.45%; Cu powder is 1.82%; Zine stearate is 0.60%; Iron powder is surplus.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing 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 (3)
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; 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%;
Iron powder surplus.
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, it 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%;
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 |
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| Publication Number | Publication Date |
|---|---|
| CN103277308A CN103277308A (en) | 2013-09-04 |
| CN103277308B true CN103277308B (en) | 2015-12-02 |
Family
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| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| 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 |
-
2013
- 2013-05-27 CN CN201310205337.1A patent/CN103277308B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN103277308A (en) | 2013-09-04 |
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Inventor after: Bao Lingyu Inventor before: Bao Ganfeng Inventor before: Long Bin |
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