CN100462576C - Piston type compressor and assembling method thereof - Google Patents

Piston type compressor and assembling method thereof Download PDF

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Publication number
CN100462576C
CN100462576C CNB2005100916339A CN200510091633A CN100462576C CN 100462576 C CN100462576 C CN 100462576C CN B2005100916339 A CNB2005100916339 A CN B2005100916339A CN 200510091633 A CN200510091633 A CN 200510091633A CN 100462576 C CN100462576 C CN 100462576C
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CN
China
Prior art keywords
axle sleeve
tie rod
rod holes
piston
projection
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
Application number
CNB2005100916339A
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Chinese (zh)
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CN1740565A (en
Inventor
于尔根·休斯
拉斯·奥滕
克里斯琴·杰普森
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Secop GmbH
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Danfoss AS
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Publication of CN1740565A publication Critical patent/CN1740565A/en
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Publication of CN100462576C publication Critical patent/CN100462576C/en
Expired - Fee Related legal-status Critical Current
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/10Bearings, parts of which are eccentrically adjustable with respect to each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/14Provisions for readily assembling or disassembling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00Shafts; Axles; Cranks; Eccentrics
    • F16C3/04Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/22Cranks; Eccentrics
    • F16C3/28Adjustable cranks or eccentrics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04Connecting-rod bearings; Attachments thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00Pump parameters
    • F04B2201/02Piston parameters
    • F04B2201/0201Position of the piston

Abstract

The piston (3) is moved inside a cylinder of a refrigerant condensing device assembled of a crankshaft with a crank pin accommodated inside an eye (7) at the connecting rod (6) and a bearing bush (9) between the pin and the eye (7). The outer surface of the pin and the inner surface of the eye (7) are asymmetrically arranged. The outer surface of the bearing bush (9) is divided into a shallow sliding segment (15) and a higher main segment (16) facilitating a convenient positioning before the final pressing.

Description

Piston compressor and assembly method thereof
Technical field
The present invention relates to a kind of piston compressor, especially coolant compressor, it comprises the bent axle of a piston that can move, a band crank pin, connecting rod and axle sleeve between crank pin and tie rod holes that has around the tie rod holes of crank pin in cylinder, the inwall of axle sleeve its outer wall relatively extends prejudicially.The invention still further relates to a kind of method of assembling this piston compressor in addition, wherein, tie rod holes is fixed between tie rod holes and the crank pin by crank pin guiding and axle sleeve.
Background technique
As a kind of embodiment of piston compressor the present invention is described by a coolant compressor below.But the present invention also can be applied to other piston compressors.
Coolant compressor is produced in a large number.Therefore people must be devoted to cost of production is remained low as far as possible.This for example can cause the component of coolant compressor that bigger tolerance is arranged.Should consume the least possible energy when coolant compressor moves on the other hand, that is reach high efficient.And the precondition of accomplishing this point is that the interior upper dead center clearance of cylinder is as far as possible little.Therefore people must can take measures to influence the configuration between crank pin and the piston when the assembling coolant compressor.
For this purpose, by the known axle sleeve that between tie rod holes and crank pin, adopts an off-centre of WO 03/056178A1.This eccentric axle sleeve can be packed in the tie rod holes like this, that is, make when bent axle is in corresponding angular position, that is when crank pin during farthest near cylinder, the last minimum cylinder volume that is the upper dead center clearance of piston reach minimum degree.
By the known a kind of similar method of FR1279473.How the various possibilities that tie rod holes and axle sleeve are coupled together also have been described there, that is have used soldering, melting welding, compress or with nut that is spun on the axle sleeve.But these fixed solution are all cumbersome.The method of heating as melting welding or soldering, has the danger of distortion, and this distortion is from now on to having moved deleterious effects.
Summary of the invention
The technical problem to be solved in the present invention is exactly the assembling that will simplify for the piston compressor of the above-mentioned type.
Above-mentioned technical problem in the piston compressor of the described type of this paper preface by taking following measures to solve: outer wall has one first axial walls section and one second axial walls section, the former has first diameter, the internal diameter of first diameter and tie rod holes constitutes sliding fit, the latter has second diameter, and the internal diameter of second diameter and tie rod holes constitutes press fit.
Adopt this axle sleeve, the assembling of piston compressor can be finished fairly simplely.At first, need not to establish axle sleeve ground between tie rod holes and crank pin is set on tie rod holes on the crank pin.Pack into then axle sleeve and by this way promptly, makes axle sleeve and tie rod holes at first form sliding fit, because in the tie rod holes of just the first axial walls section of this axle sleeve being packed into.Axle sleeve was exactly rotatable originally on crank pin.Can in cylinder, reach the position of expectation until piston with respect to the tie rod holes rotary sleeve now.For this purpose, for example rotating drive shaft makes crank pin reach it most possibly near cylinder.By rotary sleeve piston is moved on to its upper dead center now, like this piston is moved on to its upper dead center more precisely, that is, make described minimum cylinder volume that is the upper dead center clearance minimum of going up.Because axle sleeve and tie rod holes form sliding fit, this rotation does not have and costs big power and just can implement.Therefore, this adjustment can have than higher precision finish.Behind the position that reaches expectation, axle sleeve further is pressed in the tie rod holes, thereby between the second wall section and tie rod holes, forms press fit.This press fit guarantees that axle sleeve no longer can rotate in tie rod holes.Connecting rod was set up with this moment that is connected between the crank pin, and made piston that best located be arranged in cylinder.
Preferably, the first axial walls section links to each other with the second axial walls section.Therefore utilize the axial length of axle sleeve best.Each zone of axial length is used for finishing a kind of function respectively.
Preferably, the first axial walls section has than the little length of the second axial walls section.The first axial walls section only is used to make axle sleeve correctly to locate in tie rod holes.Therefore the first axial walls section in fact need only be so long, that is, axle sleeve on the skew is not positioned in the tie rod holes.This length can be shorter because axle sleeve in addition can also by one the step that constitutes between first and second wall section by the edge that is placed on tie rod holes on.Therefore later form the major part that the second axial walls section of press fit can be occupied axial length with tie rod holes.This length is big more, later between tie rod holes and axle sleeve be connected stable more and lasting more.
Preferably, axle sleeve has at least one radially outwardly directed projection, and it is centered around at least a portion of the second wall section between it and the first axial walls section.This projection has many advantages.For example can when assembling, utilize it as auxiliary device.If people catch axle sleeve on projection, the danger of damage axle sleeve outer wall is just very little in the zone of the second axial walls section so.And this damage can influence the soundness of press fit afterwards.
Preferably, projection is located in the axle sleeve distolateral district adjacent with the second wall section.Just in fact axle sleeve might be pressed in the tie rod holes along its total length thus.Provide a bigger area to be used for press fit here, meanwhile axle sleeve does not stretch out from tie rod holes too much.
Also advantageously, projection has a pressure acting surface in its that side back to the first wall section.Must partly on axle sleeve, apply a huge pressure in order to set up press fit.Projection provides an additional face to be used in actuating pressure on this face now.Therefore, this pressure needn't be only by narrow distolateral the importing in the axle sleeve of axle sleeve.
Also advantageously, projection has a torsional interaction face.This torsional interaction face makes axle sleeve be easier to rotation in tie rod holes.People for example can act on an instrument there.For manual adjustment, it also is favourable that a torsional interaction face is arranged.
Preferably, projection has an orientation vertically predetermined with respect to connecting rod.Therefore, projection also can be used as supplementary device be used for axle sleeve from the outset just " correctly " pack in the tie rod holes, so only need remake rotatablely moving in a small amount, just piston correctly can be positioned in the cylinder.
Advantageously, be provided with a plurality of projections circumferentially.For example be easier to thus pressure is imported into, so that axle sleeve is pressed in the tie rod holes.
In this respect advantageously, one of projection is designed to the mark projection.It for example can be along bigger width is circumferentially arranged.
Also advantageously, the downside that faces the first axial walls section of each projection is located in the same plane, constitutes a stop surface by each downside thus.Therefore, these projections guarantee that axle sleeve can be not crooked in tie rod holes.When process of press in finished, axle sleeve had a kind of orientation in tie rod holes, and at this moment, the axis of tie rod holes and axle sleeve is arranged parallel to each other.
Advantageously, axle sleeve distolaterally has first mark at it, and tie rod holes distolaterally has second mark at it, and wherein, one of two marks are designed to calibrated scale.This makes assembling be more prone to equally.For example people can measure piston and how far must move, and could make minimum cylinder volume for minimum in piston upper dead center zone.For each moving movement of piston needs the predetermined angle of axle sleeve rotation, this corner can be adjusted easily by mark and calibrated scale.
The present invention provides a kind of like this method of assembling one piston compressor for this reason, this piston compressor comprises a piston that can move in a cylinder, a bent axle that has a crank pin, a connecting rod and the axle sleeve between crank pin and tie rod holes that has one around the tie rod holes of this crank pin, the inwall of this axle sleeve extends prejudicially with respect to its outer wall, wherein, this tie rod holes is set on this crank pin and described axle sleeve is fixed between this tie rod holes and the crank pin, according to the present invention, use an axle sleeve that comprises a sliding fit district and a press fit district, by sliding fit this axle sleeve is packed in the tie rod holes, rotate this axle sleeve then and in cylinder, reach a precalculated position, then axle sleeve is fixed in the tie rod holes by press fit until piston.
As top set forth, piston so is positioned in the cylinder at the dead point thereon, that is, make minimum cylinder volume reach minimum.For this reason with respect to the tie rod holes rotary sleeve.This energy of rotation carries out easily, because axle sleeve only forms sliding fit at this assembling stage and tie rod holes.Sliding fit allows to rotate, but guarantees also that in addition axle sleeve in fact seamlessly is contained in the tie rod holes.Just piston reaches the position of expecting in cylinder after, a kind of press fit is set up in being connected between just definite axle sleeve and the tie rod holes for this reason between axle sleeve and tie rod holes.A kind of like this press fit can be easy to form, for this reason as long as axle sleeve is pressed in the crank pin.
Preferably on axle sleeve, establish at least one axial stop in this respect, then axle sleeve is pressed in the tie rod holes until meeting this axial stop.Prevent from thus axle sleeve is pressed in the tie rod holes too far.If a plurality of backstops are set, then they can also be used for axle sleeve do not had on the skew and are fixed in the tie rod holes.
Description of drawings
Below by preferred embodiment and accompanying drawings the present invention.Wherein:
Fig. 1 schematically illustrates piston compressor;
Fig. 2 represents the corner of axle sleeve and the relation between the piston shift motion;
Fig. 3 represents the first kind of form of implementation and the connecting rod of axle sleeve; And
Fig. 4 represents second kind of form of implementation of axle sleeve.
Embodiment
Fig. 1 signal also thereby is represented a coolant compressor 1 as a kind of embodiment of piston compressor greatly simplifiedly.This coolant compressor 1 has a cylinder 2, and piston 3 can to-and-fro motion in this cylinder 2.Cylinder 2 is by cylinder cap 4 sealings.Cylinder 2, piston 3 and cylinder cap 4 constitute the border of pressing chambers 5, and refrigerant gas is by compression therein when (at Fig. 1) is mobile to the right when piston 3.
Piston 3 is by connecting rod 6 transmissions, and connecting rod is pressed mode and the piston 3 further represented among the figure in the end of its piston one side not hinged.At its other end, connecting rod 6 has a tie rod holes 7, and it is round crank pin 8.Expression tie rod holes 7 is along circumferentially sealing among the figure.But this is not absolute demand.
Between tie rod holes 7 and crank pin 8, adorn an axle sleeve 9.It is that circle and center are 11 outer wall 10 that this axle sleeve has a cross section, and a cross section is arranged is circle but the center is 13 inwall 12.Inwall 10 and inwall 12 are arranged prejudicially mutually, be that is to say two center 11,13 apart throw of eccentric E.
The center 11 of outer wall 10 is on the longitudinal axis 14 of connecting rod 6, and this longitudinal axis also intersects with the center of tie rod holes 7.The center 13 of inwall 12 is consistent with the center of crank pin 8.
Fig. 1 represents piston 3 position at dead point thereon.Constitute a compression dead point clearance at this state pressing chamber 5, can make it to minimize by rotary axle box 9.Here, axle sleeve 9 is so packed between tie rod holes 7 and the crank pin 8,, makes the longitudinal axis 14 of the line of throw of eccentric that is center 11 and 13 perpendicular to connecting rod 7 that is.People have maximum correction possibility in this case.
If now with respect to tie rod holes 7 rotary axle box 9, then make piston 3 in cylinder 2, move back and forth a stroke, the trip maximum equals the twice size of throw of eccentric E.In Fig. 2, schematically illustrate corresponding relation.Y coordinate is described the displacement of piston 3 in cylinder.Abscissa is described the corner of axle sleeve 9 with respect to tie rod holes 7.For for example displacement of piston 3 in cylinder reaches 0.1mm, axle sleeve 9 must be with respect to about 30 ° of tie rod holes 7 rotations.
Fig. 3 schematically illustrates the connecting rod 6 that has tie rod holes 7 and axle sleeve 9.Axle sleeve 9 has one first axial walls section 15 on its outer wall 10, its diameter is defined as making it and tie rod holes 7 to form sliding fit.In the tie rod holes 7, then axle sleeve 9 can seamlessly rotate with respect to tie rod holes 7 if axle sleeve 9 is packed first wall section 15 into.Therefore can adjust with comparalive ease with respect to the position of cylinder 2 or cylinder cap 4 at this state lower piston 3.Because with respect to 9 very little power of needs of tie rod holes 7 rotary axle box, so also can be to realize adjusting than higher precision.
Axle sleeve 9 has the second axial walls section 16, its slightly larger in diameter.The diameter of the second wall section 16 is so definite, that is, axle sleeve 9 and tie rod holes 7 are connected by press fit, needs bigger power for this reason.
Form a little step 17 between the first wall section 15 and the second wall section 16, it can be used to as the assembling supplementary device.Therefore these two wall sections, 15,16 mutual transition.When just beginning to assemble, axle sleeve 9 can be inserted in the tie rod holes 7 so deeply, that is, axle sleeve 9 first wall section 15 can only be imported in the tie rod holes 7 and with step 17 rest on tie rod holes 7 distolateral 18 on.That is to say that the outer wall 10 that can guarantee axle sleeve 9 is parallel to the inwall orientation of tie rod holes 7.
Connecting rod 6 has a spheroid 4 at the other end, and it can be inserted in the piston 3, in order that constitute globular hinge with piston 3.
Fig. 4 represents a kind of form of implementation of modification, and wherein identical part adopts same reference character to represent.
Axle sleeve 9 has additional radial projection 19-21 now.These radial projection 19-21 is along circumferentially arranging evenly distributedly.They be located at that adjacent with the second wall section 16 distolateral on.In other words, second wall section 16 to the small part is between radially the projection 19-21 and first wall section 15.Projection 19-21 has a plurality of functions.They can be used as the torsional interaction face first.People can be with instrumental purpose on projection 19-21, so that apply moment of torsion and make its rotation on axle sleeve 9.In addition, these projections 19-21 needs to apply this power as the point of action of pressure for axle sleeve 9 is pressed in the tie rod holes 7.Therefore, described power needn't just act on the narrow end face of axle sleeve 9 again.At last, the downside that projection 19-21 faces tie rod holes 7 also forms stop surface, projection 19-21 by they abut in tie rod holes 7 distolateral 18 on.Here, the downside of each projection 19-21 is arranged in the plane perpendicular to outer wall 12.Therefore they prevent that reliably axle sleeve 9 is crooked with respect to tie rod holes 7.
Among Fig. 1 with the design of Fig. 4 of having overlooked chart.As can be seen, projection 21 has a width more bigger than two other projection 19,20.Calibrated scale 22 is located on the projection 21.A mark 23 is arranged on tie rod holes 7, and it indicates longitudinal axis 14.Certainly, calibrated scale 22 also can extend to outside the projection 21 on axle sleeve 9 distolateral.People can utilize calibrated scale 22 and mark 23 now, so that adjust the position of piston 3 in cylinder 2.Determine the stroke that piston 3 must move with respect to cylinder cap 4, so that be placed on an optimum position for this reason.As seen from Figure 2, described shift motion is corresponding with respect to the corner of a regulation of tie rod holes 7 with axle sleeve 9.This corner can be adjusted by the calibrated scale 22 and the mating reaction of mark 23 now, thereby significantly simplifies this adjustment.
One mark can certainly be done making a calibrated scale on the axle sleeve 9 and on tie rod holes 7.So pairing has identical effect.
Axle sleeve 9 preferably is designed to sintered part.It allows to produce at an easy rate.

Claims (14)

1. piston compressor, it comprises a piston that can move in a cylinder, a bent axle that has a crank pin, a connecting rod and the axle sleeve between crank pin and tie rod holes that has one around the tie rod holes of crank pin, the inwall of this axle sleeve its outer wall relatively extends prejudicially, it is characterized by: this outer wall (10) has the first axial walls section (15) and second an axial walls section (16) with second diameter with first diameter, wherein, the internal diameter of this first diameter and described tie rod holes (7) constitutes sliding fit, this second diameter then constitutes press fit with the internal diameter of tie rod holes (7), wherein, described axle sleeve (9) has at least one radially outwardly directed projection (19-21), and this at least one projection (19-21) only is arranged on the second axial walls section (16) and upward and along it axially only covers the part of this second axial walls section (16).
2. according to the described piston compressor of claim 1, it is characterized by: the described first axial walls section (15) links to each other with the second axial walls section (16).
3. according to claim 1 or 2 described piston compressors, it is characterized by: the described first axial walls section (15) has the little axial length of a ratio second axial walls section (16).
4. according to claim 1 or 2 described piston compressors, it is characterized by: described projection (19-21) is located in the distolateral district adjacent with the second axial walls section (16) of described axle sleeve (9).
5. according to claim 1 or 2 described piston compressors, it is characterized by: described projection (19-21) has a pressure acting surface at it back to first that side of axial walls section (15).
6. according to claim 1 or 2 described piston compressors, it is characterized by: described projection (19-21) has a torsional interaction face that is used to rotate described axle sleeve (9).
7. according to claim 1 or 2 described piston compressors, it is characterized by: described projection (19-21) has an orientation predetermined with respect to vertical (14) of connecting rod (6) when mounted.
8. according to claim 1 or 2 described piston compressors, it is characterized by: along the circumferential distribution of described axle sleeve (9) be provided with a plurality of projections (19-21).
9. according to the described piston compressor of claim 8, it is characterized by: one of described projection (19-21) is designed to mark projection (21).
10. according to the described piston compressor of claim 8, it is characterized by: the downside that faces the first axial walls section (15) of described each projection (19-21) is located in the plane, and the downside by them constitutes a stop surface thus.
11. according to claim 1 or 2 described piston compressors, it is characterized by: described axle sleeve (9) distolaterally has first mark (22) at it, described tie rod holes (7) then distolaterally has second mark (23) at it, and wherein, one in these two marks (22,23) is designed to calibrated scale.
12. according to claim 1 or 2 described piston compressors, it is characterized by: described piston compressor is a kind of refrigerant compressor.
13. the method for assembling one piston compressor, this piston compressor comprises a piston that can move in a cylinder, a bent axle that has a crank pin, a connecting rod and the axle sleeve between crank pin and tie rod holes that has one around the tie rod holes of this crank pin, the inwall of this axle sleeve extends prejudicially with respect to its outer wall, wherein, this tie rod holes is set on this crank pin and described axle sleeve is fixed between this tie rod holes and the crank pin, it is characterized by: use an axle sleeve that comprises a sliding fit district and a press fit district, by sliding fit this axle sleeve is packed in the tie rod holes, rotate this axle sleeve then and in cylinder, reach a precalculated position, then axle sleeve is fixed in the tie rod holes by press fit until piston.
14. in accordance with the method for claim 13, it is characterized by: at least one axial stop is set on axle sleeve, and axle sleeve is pressed in the tie rod holes until meeting this axial stop.
CNB2005100916339A 2004-08-25 2005-08-11 Piston type compressor and assembling method thereof Expired - Fee Related CN100462576C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410041042 DE102004041042A1 (en) 2004-08-25 2004-08-25 Piston for refrigerant condensing device, comprising eye of connecting rod made of two segments, and method of assembly
DE102004041042.9 2004-08-25

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Publication Number Publication Date
CN1740565A CN1740565A (en) 2006-03-01
CN100462576C true CN100462576C (en) 2009-02-18

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DE102008027596A1 (en) 2008-06-10 2009-12-24 Daimler Ag Method for producing a bearing component
JP5423550B2 (en) 2010-04-06 2014-02-19 株式会社Ihi Drive shaft structure, turbo compressor and turbo refrigerator
CN102536812A (en) * 2010-12-29 2012-07-04 珠海格力节能环保制冷技术研究中心有限公司 Scroll compressor
CN102896487B (en) * 2012-10-18 2014-12-31 柳州五菱汽车有限责任公司 Mounting method of piston clamping spring
EP3296198B1 (en) 2016-09-15 2018-11-14 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Adjustment of track and balance of a multi-blade rotor
CN108757715B (en) * 2018-07-13 2023-08-29 珠海格力节能环保制冷技术研究中心有限公司 Connecting rod, pump body assembly and compressor
CN115217744B (en) * 2022-07-08 2023-10-27 合肥通用机械研究院有限公司 Oil-free compressor transmission device and piston ring optimal design method thereof

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DE102004041042A1 (en) 2006-03-30

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