CN101705932A - Piston rod for oil-free lubrication gas compressor - Google Patents
Piston rod for oil-free lubrication gas compressor Download PDFInfo
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- CN101705932A CN101705932A CN200910201750A CN200910201750A CN101705932A CN 101705932 A CN101705932 A CN 101705932A CN 200910201750 A CN200910201750 A CN 200910201750A CN 200910201750 A CN200910201750 A CN 200910201750A CN 101705932 A CN101705932 A CN 101705932A
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- piston rod
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- gas compressor
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Abstract
The invention discloses a piston rod for an oil-free lubrication gas compressor, which is made from 38CrMoAl through the following steps: processing a blank of the piston rod by using a forging method first, and then performing rough machining; performing quenching and tempering after the rough machining, wherein the quenching temperature is between 800 and 900 DEG C, and the tempering temperature is between 550 and 650 DEG C; after the quenching and tempering, performing semi-finishing, and performing annealing for relieving stress after the semi-finishing, wherein the annealing temperature is between 550 and 650 DEG C; after the annealing, performing finishing, and then performing ionic nitriding on a working surface, wherein the nitriding temperature is between 550 and 650 DEG C and the thickness of a nitride layer is between 0.1 and 0.3 millimeter; and after the ionic nitriding, finally performing polishing or super-grinding on the working surface to process a finished product. The piston rod has the characteristics of good abrasion resistance, high reliability and long service life, and is suitable for the oil-free lubrication gas compressor and a stirling engine.
Description
Technical field
The present invention relates to piston rod, the wear-resistant piston rod manufacturing process of especially a kind of oil-free lubrication gas compressor.
Background technique
Piston rod is the vitals of gas compressor, its function is to give piston with the force transmission that acts on the connecting rod, and then promotion Piston Compression gas, under the working state, piston rod is done linear reciprocating motion at a high speed always, particularly for non-lubricated gas compressor, it is had higher requirement to sealing, wear resistance, reliability.In non-lubricated gas compressor, the sealing of piston rod mainly adopts combination seal to prevent the leakage problem along piston rod of oil, gas.It as the patent No. 03116104.9 Chinese invention patent " the grease proofing black box of non-lubricated gas compressor piston rod ", a kind of novel grease proofing black box is disclosed, this assembly comprises the hat type sealing and the rod-type sealing of self tightening, the material that the hat type sealing is adopted is the filled with carbon fibers teflon, the hat type sealing is pressed on the piston rod by the mode of self-tightening, prevents gas leakage.Consider intensity, it is the forging steel part processing of 38CrMoAl that abrasion resistance properties, piston rod are selected the trade mark usually for use.Above-mentioned piston rod, sealing effect is better.But above-mentioned piston rod, in use for some time, working time is when longer, after particularly operation surpassed 500h, serious abrasive wear appearred in piston rod and the hat type position that is sealed and matched, and piston rod working surface and hat type sealing wear aggravate, had influence on the working life of sealing effect and black box, the piston rod operating life is short, and poor reliability generally just needed by about 500 hours to change piston rod or/and black box.
Summary of the invention
The object of the present invention is to provide a kind of piston rod for oil-free lubrication gas compressor, solve present piston rod working surface and wear no resistance, operating life is short, the technical problem of poor reliability.
The objective of the invention is to solve by following technological scheme:
A kind of piston rod for oil-free lubrication gas compressor, described piston rod material is 38CrMoAl, processing technology is as follows:
A) process the piston rod blank with forging method, again the piston rod blank is carried out roughing;
B) piston rod carries out quenching with Subsequent tempering after finishing roughing, and quenching temperature is 800 ℃～900 ℃, 550 ℃～650 ℃ of tempering temperatures;
C) after the piston rod quenching with Subsequent tempering, carry out semi finishing by drawing again;
D) annealing in process that eliminates stress after the piston rod semi finishing, annealing temperature are 550 ℃～650 ℃;
E) after the piston rod annealing in process, carry out fine finishing;
F) piston rod is carried out plasma nitriding;
G) after the piston rod plasma nitriding, working surface is polished or super grinding processing.
Above-mentioned piston rod for oil-free lubrication gas compressor, when piston rod was carried out plasma nitriding, nitriding temperature was 550 ℃～650 ℃, nitride layer thickness is 0.1～0.3mm.
Above-mentioned piston rod for oil-free lubrication gas compressor after the piston rod annealing in process, carries out fine finishing, and piston rod working surface roughness is refined to Ra0.4, the monolateral made allowance 0.01～0.03mm of working surface.
Above-mentioned piston rod for oil-free lubrication gas compressor after the piston rod plasma nitriding, polishes or the super grinding processing working surface, makes the working surface roughness reach Ra0.2.
Above-mentioned piston rod for oil-free lubrication gas compressor, after the piston rod annealing in process, the used technology of fine finishing is correct grinding.
Piston rod for oil-free lubrication gas compressor of the present invention, material are adopted as 38CrMoAl first, and adopt ion nitriding technology, have made piston rod for oil-free lubrication gas compressor, have obtained significant effect.Beneficial effect of the present invention is as follows:
1, have the good wear resistance energy, join the durable certification test of machine through 2000 hours, the gas leakage fault do not occur, open and inspect and find that piston rod surface is in good condition, do not see noticeable wear, sealing effect is good, and improved more than the several times working life.
2, this invention not only can be applied on the non-lubricated gas compressor, can also be applied on other motors that have the Oilless Lubrication Seal in Petroleum Gas requirement, as Stirling engine.
Description of drawings
Fig. 1 is the structural representation of piston rod of the present invention.
Embodiment
As shown in the figure, the intermediate portion of piston rod is a working surface, need to cooperate with black box, during work, the piston rod to-and-fro motion forms the oil-free lubrication dynamic seal (packing), therefore between piston rod and the black box, require piston rod to have good wear resistance, and and black box between good motive sealing effect.
Piston rod for oil-free lubrication gas compressor of the present invention adopts the 38CrMoAl material, and adopts following processes:
A) process the piston rod blank with forging method;
B) again blank being carried out roughing, mainly is machining;
C) carry out quenching with Subsequent tempering after the roughing, quenching temperature is 800 ℃～900 ℃, 550 ℃～650 ℃ of tempering temperatures;
D) carry out semi finishing after the quenching with Subsequent tempering;
E) annealing in process that eliminates stress after the semi finishing, annealing temperature are 550 ℃～650 ℃;
F) and to working surface carry out fine finishing, the piston rod working surface is finish grinded to roughness Ra0.4, the monolateral made allowance 0.01～0.03mm of working surface;
G) after the piston rod fine finishing, work shown carry out plasma nitriding that nitriding temperature is 550 ℃～650 ℃, nitride layer thickness is 0.1～0.3mm;
H) need after the plasma nitriding working surface is carried out superfinish, polish or super grinding processing, make the roughness of working surface reach Ra0.2.
According to above-mentioned technology, the inventor has carried out technological test, get respectively different quenching with Subsequent tempering temperature,, plasma nitriding temperature, nitride layer thickness, test, as follows respectively:
Embodiment 1: carry out quenching with Subsequent tempering after the piston rod roughing, quenching temperature is got 800 ℃, 850 ℃, 900 ℃ respectively, and tempering temperature is got 550 ℃, 600 ℃, 650 ℃ respectively, carries out technological test.
Embodiment 2: nitriding temperature is got 550 ℃, 600 ℃, 650 ℃ respectively, carries out technological test.
Embodiment 3: nitride layer thickness is got 0.1mm, 0.2mm, 0.3mm respectively, carries out technological test.
According to the above-mentioned piston rod that processes, to carry out stand test and joined the machine test, reliability has all reached 2000 hours, after endurance test in the 2000 hours examination, open and inspect discovery, the piston rod working surface does not have noticeable wear, sealing effect is good, and the operating life and the reliability of piston rod are significantly improved.
Above-mentioned piston rod is not very high occasion for seal request, and piston rod movement linear velocity, intensity are not very high occasions, and the piston rod blank adopts other processing methods, is fine as machine-tooled method, tight casting process yet.
Above embodiment only is used to the present invention is described and unrestricted technological scheme described in the invention is not limited to above form, the replacement that can also make amendment or be equal to the present invention; Technological scheme and improvement thereof that all do not break away from the spirit and scope of the present invention all will fall into protection scope of the present invention.
Claims (5)
1. piston rod for oil-free lubrication gas compressor, it is characterized in that: described piston rod material is 38CrMoAl, and processing technology is as follows:
A) process the piston rod blank with forging method, again the piston rod blank is carried out roughing;
B) piston rod carries out quenching with Subsequent tempering after finishing roughing, and quenching temperature is 800 ℃～900 ℃, 550 ℃～650 ℃ of tempering temperatures;
C) after the piston rod quenching with Subsequent tempering, carry out semi finishing by drawing again;
D) annealing in process that eliminates stress after the piston rod semi finishing, annealing temperature are 550 ℃～650 ℃;
E) after the piston rod annealing in process, carry out fine finishing;
F) piston rod is carried out plasma nitriding;
G) after the piston rod plasma nitriding, working surface is polished or super grinding processing.
2. piston rod for oil-free lubrication gas compressor according to claim 1 is characterized in that: when piston rod was carried out plasma nitriding, nitriding temperature was 550 ℃～650 ℃, and nitride layer thickness is 0.1～0.3mm.
3. piston rod for oil-free lubrication gas compressor according to claim 1 and 2 is characterized in that: after the piston rod annealing in process, carry out fine finishing, piston rod working surface roughness is refined to Ra0.4; The monolateral made allowance 0.01～0.03mm of working surface.
4. piston rod for oil-free lubrication gas compressor according to claim 1 and 2 is characterized in that: after the piston rod plasma nitriding, working surface is polished or the super grinding processing, make the working surface roughness reach Ra0.2.
5. piston rod for oil-free lubrication gas compressor according to claim 1 and 2 is characterized in that: after the piston rod annealing in process, the used technology of fine finishing is correct grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910201750A CN101705932A (en) | 2009-11-04 | 2009-11-04 | Piston rod for oil-free lubrication gas compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910201750A CN101705932A (en) | 2009-11-04 | 2009-11-04 | Piston rod for oil-free lubrication gas compressor |
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| CN101705932A true CN101705932A (en) | 2010-05-12 |
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| CN200910201750A Pending CN101705932A (en) | 2009-11-04 | 2009-11-04 | Piston rod for oil-free lubrication gas compressor |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862940A (en) * | 2010-05-17 | 2010-10-20 | 隆昌山川精密焊管有限责任公司 | Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle |
| CN102337479A (en) * | 2011-10-21 | 2012-02-01 | 天津大学 | Ultrafine crystal steel suitable for cutting single-crystal diamond and preparation method thereof |
| CN102410225A (en) * | 2011-10-17 | 2012-04-11 | 上海西工压缩机配件有限公司 | Compressor blade and preparation technology thereof |
| CN102554580A (en) * | 2012-02-23 | 2012-07-11 | 扬州市飞龙气动液压设备有限公司 | Machining process for plunger of high-pressure cylinder |
| CN102719784A (en) * | 2012-07-03 | 2012-10-10 | 株洲联诚集团有限责任公司 | Preparation method for improving abrasion resistance of piston rod of oil damper of motor vehicle |
| CN104690520A (en) * | 2015-02-12 | 2015-06-10 | 丽水学院 | Processing technique for rack screw of automobile electrical power steering box |
| CN105274305A (en) * | 2014-07-20 | 2016-01-27 | 安庆市亿豪工贸发展有限公司 | Heat treatment method for piston rod |
| CN105583593A (en) * | 2016-02-25 | 2016-05-18 | 成都亨通兆业精密机械有限公司 | High-speed machining technology for automobile die |
| CN106810777A (en) * | 2016-12-16 | 2017-06-09 | 吴中区穹窿山天仲高分子材料技术研究所 | A kind of high intensity piston rod composite and preparation method thereof |
| CN107058939A (en) * | 2017-04-18 | 2017-08-18 | 东莞市欣悦模具有限公司 | Nitrogen spring plunger rod（Piston rod）Technology for Heating Processing |
| CN107253024A (en) * | 2017-06-14 | 2017-10-17 | 康为同创集团有限公司 | Barreled tooth flank processing technology |
| CN113187719A (en) * | 2021-04-28 | 2021-07-30 | 上海朋泰机械科技有限公司 | Gear ring, pump shaft, machining method of pump shaft and internal gear pump |
| CN113319654A (en) * | 2021-05-31 | 2021-08-31 | 江苏鑫泽不锈钢制品有限公司 | Grinding process for stainless steel workpiece with honeycomb structure |
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| JPH0641716A (en) * | 1992-07-24 | 1994-02-15 | Toshiba Corp | Surface reformed steel material |
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| JPH0641716A (en) * | 1992-07-24 | 1994-02-15 | Toshiba Corp | Surface reformed steel material |
| US6139296A (en) * | 1996-10-11 | 2000-10-31 | Sanyo Electric Co., Ltd. | Method for treating metal surface, rotary shaft for refrigerant compressor treated by the method, vane for refrigerant compressor treated by the method, and refrigerant compressor using the same |
| CN1455111A (en) * | 2002-04-29 | 2003-11-12 | 乐金电子(天津)电器有限公司 | Method of manufacturing pistonrod of sealed compressor |
| CN1403710A (en) * | 2002-10-17 | 2003-03-19 | 任希文 | Hardening ceramic processing method for surface of piston rod |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862940A (en) * | 2010-05-17 | 2010-10-20 | 隆昌山川精密焊管有限责任公司 | Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle |
| CN102410225A (en) * | 2011-10-17 | 2012-04-11 | 上海西工压缩机配件有限公司 | Compressor blade and preparation technology thereof |
| CN102337479A (en) * | 2011-10-21 | 2012-02-01 | 天津大学 | Ultrafine crystal steel suitable for cutting single-crystal diamond and preparation method thereof |
| CN102554580A (en) * | 2012-02-23 | 2012-07-11 | 扬州市飞龙气动液压设备有限公司 | Machining process for plunger of high-pressure cylinder |
| CN102719784A (en) * | 2012-07-03 | 2012-10-10 | 株洲联诚集团有限责任公司 | Preparation method for improving abrasion resistance of piston rod of oil damper of motor vehicle |
| CN105274305A (en) * | 2014-07-20 | 2016-01-27 | 安庆市亿豪工贸发展有限公司 | Heat treatment method for piston rod |
| CN104690520A (en) * | 2015-02-12 | 2015-06-10 | 丽水学院 | Processing technique for rack screw of automobile electrical power steering box |
| CN105583593A (en) * | 2016-02-25 | 2016-05-18 | 成都亨通兆业精密机械有限公司 | High-speed machining technology for automobile die |
| CN106810777A (en) * | 2016-12-16 | 2017-06-09 | 吴中区穹窿山天仲高分子材料技术研究所 | A kind of high intensity piston rod composite and preparation method thereof |
| CN107058939A (en) * | 2017-04-18 | 2017-08-18 | 东莞市欣悦模具有限公司 | Nitrogen spring plunger rod（Piston rod）Technology for Heating Processing |
| CN107253024A (en) * | 2017-06-14 | 2017-10-17 | 康为同创集团有限公司 | Barreled tooth flank processing technology |
| CN113187719A (en) * | 2021-04-28 | 2021-07-30 | 上海朋泰机械科技有限公司 | Gear ring, pump shaft, machining method of pump shaft and internal gear pump |
| CN113319654A (en) * | 2021-05-31 | 2021-08-31 | 江苏鑫泽不锈钢制品有限公司 | Grinding process for stainless steel workpiece with honeycomb structure |
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Application publication date: 20100512 |