CN101724741A - Method for manufacturing compressor crankshaft - Google Patents
Method for manufacturing compressor crankshaft Download PDFInfo
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- CN101724741A CN101724741A CN200810152393A CN200810152393A CN101724741A CN 101724741 A CN101724741 A CN 101724741A CN 200810152393 A CN200810152393 A CN 200810152393A CN 200810152393 A CN200810152393 A CN 200810152393A CN 101724741 A CN101724741 A CN 101724741A
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- manufacture method
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- bent axle
- steel
- compressor crank
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Abstract
The invention discloses a method for manufacturing a compressor crankshaft, which comprises that: the compressor crankshaft is made of steel, and a rotary force of an electric mechanism part is transferred to the crankshaft on an eccentric part of a compression mechanism part; and during manufacturing, after normalizing, quenching and tempering are carried out in turn by a common thermal treatment method, the surface hardening thermal treatment is carried out, so the hardness of each part is even, the axial rigidity and the abrasion resistance are improved at the same time, and the production expense of the compressor can be greatly reduced. Moreover, when the compressor runs for long time or a substituted coolant is used, the crankshaft has sufficient abrasion resistance, so the performance and reliability of the compressor can be improved.
Description
Technical field
The present invention relates in the compressor revolving force of mechanism portion is delivered to the manufacture method of the compressor crank shaft on the compression mechanical part.
Background technology
Usually closed-type compressor comprises the mechanism portion that is used to produce power that is provided with around the inboard of outside closed shell, and transmit, receive mechanism portion power, refrigerant is carried out compressor for compressing structure portion.In addition, be combined with between mechanism portion and the compression mechanical part the bent axle of the transmission of power of mechanism portion to the compression mechanical part.
Above-mentioned closed-type compressor has broad variety according to the difference of the compress mode of refrigerant.Wherein, the compression mechanical part of rotary compressor is arranged on the intravital lower inside of closed housing, and described compression mechanical part comprises: be pressed into the bent axle that the inner peripheral surface upper and lower end that is fixed on rotor is formed with eccentric part; Be arranged on bent axle the bottom, hold the cylinder of the eccentric part of bent axle; The rolling piston that insertion is installed in rotation on the eccentric part of bent axle, under the effect of bent axle and contacts with the inwall of cylinder; Thereby be arranged on a side of cylinder, combine contiguously with rolling piston cylinder interior is divided into the baffle plate that sucks inspection and discharge area.
Rotor rotation after the rotary compressor making current as above, the rotation of rotor banding dynamic crankshaft, thereby make rolling piston in the contact cylinder inner peripheral surface, be rotated motion, make baffle plate contact with the cylinder wall line and seesaw at the axial direction due of rolling piston, make refrigerant be inhaled into cylinder interior and be compressed, discharge to the internal space of closed shell then.Here, described bent axle is to be formed by the spheroidal graphite cast iron manufacturing that contains carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulphur (S), magnesium (Mg), tin compositions such as (Sn).
But, though the bent axle of existing rotary compressor as above has the axial rigidity (Axial stiffness) or the surface hardness of improvement, can support mechanism portion effectively, but the Master Cost of making compressor is higher, thereby has increased the cost of compressor.
Summary of the invention
In order to address the above problem, it is a kind of when reducing materials cost that one object of the present invention is to provide, can under the situation of the long-time running of compressor, keep the favorable mechanical performance, thereby stably support mechanism portion, prevent to reduce the manufacture method of the compressor crank shaft of compression performance owing to wearing surface.
The objective of the invention is to be achieved through the following technical solutions:
A kind of manufacture method of compressor crank shaft comprises: the revolving force of mechanism portion is delivered to the bent axle on the eccentric part of compression mechanical part with the steel manufacturing; In manufacturing processed, according to the Conventional Heat Treatment method carry out normalizing (Normalizing) successively, quench (Quenching) and tempering (Tempering) after, carry out surface hardening thermal treatment.
When carrying out described normalizing treatment, cold in about 1 hour laggard line space of heating under 920 ℃ of conditions.
A kind of manufacture method of compressor crank shaft, with the steel manufacturing revolving force of mechanism portion is delivered on the eccentric part of compression mechanical part bent axle and in the process of making, carrying out carrying out surface hardening thermal treatment after quenching and tempering is handled.
Preferably, when carrying out the quenching and tempering processing, carry out oil cooling after about 1 hour, heated about 1 hour down at 350 ℃ again afterwards in heating under 850 ℃ of conditions.
Preferably, described surface hardening thermal treatment is process purity nitrogenization, gas nitriding, tufftride, ion nitriding or the nitrogenize heat treatment process of invading the sulphur nitrogenize.
Preferably, after by heat forged processing eccentric part, carry out described Conventional Heat Treatment or surface hardening thermal treatment; Described bent axle is formed by the arbitrary material manufacturing in rapid steel, stainless steel or the nitriding steel.
The manufacture method of compressor crank shaft of the present invention is when making bent axle with steel, its steel are carried out suitable thermal treatment, thereby reach the uniform while in the hardness that makes each several part, improve its axial rigidity and wear resistance, thereby the productive expense of reduction compressor that can be big.When this external compressor turns round for a long time or using under the situation that substitutes refrigerant, also have sufficient abrasion resistance, thereby can improve the Performance And Reliability of compressor.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of rotary compressor;
Fig. 2 is the transverse cross-sectional view of the compression mechanical part of rotary compressor among Fig. 1;
The stereographic map of the bent axle of rotary compressor among Fig. 1 among Fig. 3;
Fig. 4 is the schema of the manufacture method of the bent axle of rotary compressor among Fig. 1;
Fig. 5 is through the surface tissue figure of the bent axle after the Conventional Heat Treatment in the bent axle manufacture method of Fig. 4;
Fig. 6 is through the surface tissue figure of the bent axle after the surface hardening thermal treatment in the bent axle manufacture method of Fig. 4.
Embodiment
Be elaborated below in conjunction with the manufacture method of the drawings and specific embodiments to compressor crank shaft of the present invention.
Fig. 1, Figure 2 shows that the rotary compressor that possesses the bent axle of making by manufacture method of the present invention, be provided with mechanism portion 20 and compression mechanical part 30 in the internal space of its closed shell 10.
Described mechanism portion 20 constitutes by being wound with coil and being fixedly installed on stator 21 and the rotor 22 that rotatably is provided with in the inboard of stator 21 on the closed shell 10 and being pressed into the bent axle 23 that rotates together on the rotor 22.
As shown in figures 1 and 3, the described bent axle 23 eccentric part 23b that is supported on the axial region 23a on upper bearing 32 and the lower bearing 33 and is formed on the bottom of axial region 23a prejudicially that will be narrated by the back constitutes.The internal run-through of axial region 23a is formed with oily stream 23c, is provided with oil feeder (not shown) in the lower end of oily stream 23c.In addition, Lower Half at axial region 23a, it is the interior position of dead eye 32a that axial region 23a is inserted into upper bearing 32 and lower bearing 33, both sides up and down at eccentric part 23b, be formed on the sagittal plane 23d that radially supports separately, on sagittal plane 23d, be formed with oil groove (not shown) communicatively with oily stream 23c.
In addition, be formed with on the bent axle 23 between sagittal plane 23d, the 23d of both sides up and down at eccentric part 23b less than the eccentric degree of eccentric part 23b and be supported on upper bearing 32 and the thrust face 32b of lower bearing 33 on two thrust face 23e.
In addition, above-mentioned bent axle 23 is made by for example rapid steel, stainless steel or nitriding steel.But the mechanical characteristics of above-mentioned steel is not so good as the mechanical characteristics that spheroidal graphite cast iron had in the past, and therefore axially rigidity or surface hardness descend, thereby can reduce the reliability of compressor.Therefore in the present invention, above-mentioned bent axle 23 in order to improve the mechanical characteristics of steel, has carried out thermal treatment in addition by cheap steel manufacturing in manufacturing processed.
The process of making bent axle 23 with steel among the present invention comprises as shown in Figure 4: tubing (S1), pulling (S2), heat forged (formation eccentric part) (S3), post-treatment (S4), thermal treatment (S5) and polish (S6).Wherein, heat treatment process of the present invention (S5) is made of Conventional Heat Treatment process and surface hardening heat treatment process, specifies as follows:
At first, through after the above-mentioned heat forged process, the hardness of the major axis of the minor axis of axial region 23a (being the axial region of lower bearing upper support), eccentric part 23b and axial region 23a (being the epitrochanterian axial region of being pressed into of upper bearing upper support) can dissimilate.For this reason, carry out normalizing, quenching and tempering successively, make the hardness at each position reach degree of uniformity by the Conventional Heat Treatment process.Wherein said normalizing is cold in about 1 hour laggard line space of heating under 920 ℃ of conditions, makes integral hardness rise to 230～240HmV degree.Reverse side quenches (Quenching) and tempering is after heating was carried out oil cooling in about 1 hour under 850 ℃ of conditions, heating under 350 ℃ of conditions about 1 hour, thereby when making integral hardness reach certain, global tissue becomes martensite (martensite), sharply rises to 640～670HmV in hardened while hardness.General heat treatment process as above is, according to circumstances can carry out normalizing, quenching and tempering continuously, also can only quench and tempering.Like this, above-mentioned bent axle 23 is compared with using spheroidal graphite cast iron, and the bending shaft amount obtains about improvement of about 15%, and tensile strength can strengthen about 20%.After Fig. 5 demonstrated the general thermal treatment of enforcement to steel, the surperficial integral body of bent axle became the state of martensitic stucture.
Then, in the surface hardening heat treatment process, nitrogen is penetrated into makes its surface hardening in the steel, can adopt wherein a kind of in the following nitriding process: ready steel in ammonia after heating 18～19 hours more than 500 ℃ the pure nitriding of naturally cooling; The CO gas that provides by the nitrogen element that thermolysis produced of ammonia with by carburizing gas and the gas nitriding method that realizes; Soft nitriding; Utilize discharge energy to make the N+ ion of nitrogen ion generation on (-) utmost point steel surface, form the ionitriding of nitrogenization; Utilize the isoionic sulphur nitriding etc. of invading.Through after such processing, the surface hardness of above-mentioned bent axle 23 can rise to more than the 1000HmV.Thereby reduced the wearing and tearing between the bearing 32,33 of bent axle 23 and sliding contact with it significantly, improved the reliability of compressor.Fig. 6 demonstrates the condition of surface of steel being carried out bent axle after the surface hardening thermal treatment.
In the present invention, what the bent axle of rotary compressor adopted is the low price steel, by the low price steel being carried out processing as above, improved its axial rigidity and wear resistance, thereby in the production cost that reduces compressor greatly, make it possess sufficient abrasion resistance, thereby in long-time running or use under the situation that substitutes refrigerant the also good Performance And Reliability of tool.
Though the present invention is that example is illustrated with the bent axle of rotary compressor, the manufacture method of compressor crank shaft of the present invention is equally applicable to the reciprocation compressor and the scroll compressor of piston moving linearly.
Claims (7)
1. the manufacture method of a compressor crank shaft is characterized in that: the revolving force of mechanism portion is delivered to the bent axle on the eccentric part of compression mechanical part with the steel manufacturing; In manufacturing processed, carry out normalizing, quenching and tempering successively according to the Conventional Heat Treatment method after, carry out surface hardening thermal treatment.
2. the manufacture method of compressor crank shaft according to claim 1 is characterized in that: when carrying out described normalizing treatment, cold in about 1 hour laggard line space of heating under 920 ℃ of conditions.
3. the manufacture method of a compressor crank shaft is characterized in that: with the steel manufacturing revolving force of mechanism portion is delivered on the eccentric part of compression mechanical part bent axle and in the process of making, carrying out carrying out surface hardening thermal treatment after quenching and tempering is handled.
4. according to the manufacture method of claim 1 or 3 described compressor crank shafts, it is characterized in that: when carrying out the quenching and tempering processing, carry out oil cooling after about 1 hour, heated about 1 hour down at 350 ℃ again afterwards in heating under 850 ℃ of conditions.
5. according to the manufacture method of claim 1 or 3 described compressor crank shafts, it is characterized in that: described surface hardening thermal treatment is process purity nitrogenization, gas nitriding, tufftride, ion nitriding or the nitrogenize heat treatment process of invading the sulphur nitrogenize.
6. according to the manufacture method of claim 1 or 3 described compressor crank shafts, it is characterized in that: after by heat forged processing eccentric part, carry out described Conventional Heat Treatment or surface hardening thermal treatment.
7. according to the manufacture method of claim 1 or 3 described compressor crank shafts, it is characterized in that: described bent axle is formed by the arbitrary material manufacturing in rapid steel, stainless steel or the nitriding steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810152393A CN101724741A (en) | 2008-10-20 | 2008-10-20 | Method for manufacturing compressor crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810152393A CN101724741A (en) | 2008-10-20 | 2008-10-20 | Method for manufacturing compressor crankshaft |
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| Publication Number | Publication Date |
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| CN101724741A true CN101724741A (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810152393A Pending CN101724741A (en) | 2008-10-20 | 2008-10-20 | Method for manufacturing compressor crankshaft |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312838A (en) * | 2010-10-22 | 2012-01-11 | 台州市百达制冷有限公司 | Piston for rotary compressor and manufacturing method of piston |
| CN103032330A (en) * | 2013-01-16 | 2013-04-10 | 东莞市金瑞五金制品有限公司 | Compressor and application thereof |
| CN103069166A (en) * | 2010-08-11 | 2013-04-24 | 日立空调·家用电器株式会社 | Refrigerant compressor |
| CN104060079A (en) * | 2014-06-30 | 2014-09-24 | 成都高普石油工程技术有限公司 | Sprayer processing technique capable of lowering processing difficulty |
| CN104087732A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Processing technology conducive to nozzle processing quality |
| CN104480282A (en) * | 2014-11-17 | 2015-04-01 | 芜湖福司精密模具有限公司 | Crankshaft thermal refining method |
| CN106893822A (en) * | 2015-12-18 | 2017-06-27 | 沈阳透平机械股份有限公司 | Centrifugal compressor 35CrMoV teeth set or the ionic nitriding Technology for Heating Processing of ring gear |
| CN108397392A (en) * | 2018-01-17 | 2018-08-14 | 广东美芝制冷设备有限公司 | Compressor and its pump assembly |
| CN112833017A (en) * | 2021-03-22 | 2021-05-25 | 广东美芝精密制造有限公司 | Steel crankshaft manufacturing method, steel crankshaft and rotary compressor |
-
2008
- 2008-10-20 CN CN200810152393A patent/CN101724741A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103069166A (en) * | 2010-08-11 | 2013-04-24 | 日立空调·家用电器株式会社 | Refrigerant compressor |
| CN103069166B (en) * | 2010-08-11 | 2016-01-27 | 日立空调·家用电器株式会社 | Coolant compressor |
| CN102312838A (en) * | 2010-10-22 | 2012-01-11 | 台州市百达制冷有限公司 | Piston for rotary compressor and manufacturing method of piston |
| CN103032330A (en) * | 2013-01-16 | 2013-04-10 | 东莞市金瑞五金制品有限公司 | Compressor and application thereof |
| CN103032330B (en) * | 2013-01-16 | 2016-01-20 | 东莞市金瑞五金制品有限公司 | A kind of compressor and application thereof |
| CN104060079A (en) * | 2014-06-30 | 2014-09-24 | 成都高普石油工程技术有限公司 | Sprayer processing technique capable of lowering processing difficulty |
| CN104087732A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Processing technology conducive to nozzle processing quality |
| CN104480282A (en) * | 2014-11-17 | 2015-04-01 | 芜湖福司精密模具有限公司 | Crankshaft thermal refining method |
| CN106893822A (en) * | 2015-12-18 | 2017-06-27 | 沈阳透平机械股份有限公司 | Centrifugal compressor 35CrMoV teeth set or the ionic nitriding Technology for Heating Processing of ring gear |
| CN106893822B (en) * | 2015-12-18 | 2019-03-19 | 沈阳透平机械股份有限公司 | Centrifugal compressor is covered with 35CrMoV tooth or the ionic nitriding heat treatment process of ring gear |
| CN108397392A (en) * | 2018-01-17 | 2018-08-14 | 广东美芝制冷设备有限公司 | Compressor and its pump assembly |
| CN112833017A (en) * | 2021-03-22 | 2021-05-25 | 广东美芝精密制造有限公司 | Steel crankshaft manufacturing method, steel crankshaft and rotary compressor |
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Application publication date: 20100609 |