CN103410732A - Rotary-type translation piston compressor - Google Patents
Rotary-type translation piston compressor Download PDFInfo
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- CN103410732A CN103410732A CN2013103701475A CN201310370147A CN103410732A CN 103410732 A CN103410732 A CN 103410732A CN 2013103701475 A CN2013103701475 A CN 2013103701475A CN 201310370147 A CN201310370147 A CN 201310370147A CN 103410732 A CN103410732 A CN 103410732A
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Abstract
The invention provides a rotary-type translation piston compressor, and belongs to the technical field of mechanical engineering, in order to solve the problem that an existing rotary-type compressor is high in elastic stiffness of a spring. The rotary-type translation piston compressor comprises an air cylinder with a piston cavity and a crankshaft with an eccentric part positioned in the piston cavity; an air cylinder blade groove is provided with a blade; a piston is sleeved on the eccentric part; the outer side surface of the eccentric part and the inner side surface of the piston are connected through a rolling bearing component; a bar-shaped concave circular arc groove which is parallel to a piston bus is formed on the outer circumference surface of the piston; the top surface of the blade is a convex circular arc curve surface; the circular arc top of the blade is embedded into the concave circular arc groove of the piston, and the top surface of the blade and the concave circular arc groove surface butt against mutually under the effect of spring force. The rotary-type translation piston compressor is applied to 1-1.5HP air conditioners, and the elastic stiffness of the spring is only required to be controlled to 2-4Kg/mm, or even lower.
Description
Technical field
The invention belongs to mechanical engineering technical field, relate to a kind of fluid varactor machine of rotary-piston, particularly a kind of rotary translation piston compressor.
Background technique
Compressor is low-pressure gas to be promoted to a kind of driven fluid machinery of high pressure.Air condition compressor is the heart of refrigeration system.The rotary-piston type air condition compressor is widely used in domestic air conditioning.
Pertinent literature about rolling piston compressor is more, as the rolling piston compressor [application number: 97114554.7 of Chinese patent literature record; Publication number: CN1174297A].In the background technique of the document, put down in writing traditional rolling piston compressor, as shown in Figure 7 and Figure 8, have the motor 103, cylinder 104, blade 105 of bent axle 101, driving crank 101 rotations of eccentric part 102 and a piston 106 of eccentric rotary in cylinder 104.Blade 105 leans with piston 106 at the effect lower blade 105 of spring 111, and blade 105 is circular arc with the end face that piston 106 leans.Blade 105 moves back and forth in the blade groove of cylinder 104, the external peripheral surface sliding contact of blade 105 and piston 106.Thereby blade 105 is divided into suction chamber 107 and discharge side 108 to the inside of cylinder 104.Due to 101 rotations of motor band dynamic crankshaft, piston 106 rotates in cylinder 104, and refrigerant gas enters from suction port 109, then is sent to exhaust port 110, simultaneously compressed.Usually the rotary-piston type air condition compressor is applied in 1～3HP air-conditioning, and the air-conditioning at 5HP also starts application at present, and the elastic force rigidity general control of its spring 111 is in 2～8Kg/ ㎜ left and right.
According to above-mentioned conventional construction, because the top of blade 105 has cylindrical surface, the external peripheral surface of piston 106 is also columniform, and blade 105 and contact condition between piston 106 are equivalent to contacting between small column and big column.Therefore, contact condition is linear contact, and wherein area of contact is less, and the load on per unit area is that contact stress is larger, makes the sliding contact situation between blade 105 and piston 106 become very harsh.The rotary-piston type air condition compressor of conventional construction, the frictional resistance moment between piston 106 external peripheral surfaces and blade 105 tops is greater than the frictional resistance moment between its inner circumferential surface and crankshaft eccentric section 102, and piston 106 can produce spin when work.The spin population of piston 106 depends on the ratio of its outside diameter and the diameter of bore of cylinder 104.
In above-mentioned conventional construction, the lubricated pumping effect mainly produced when working by the screw piece that is arranged on the bent axle mesopore of compressor, refrigerator oil is delivered between each bearing, and the inflow cylinder chamber forms oil film.
In order to address the above problem, someone has proposed the solution technological scheme, as a kind of vertical rotary formula compressor (notification number: JP7259767A) of Japanese patent laid-open publication gazette newspaper record; At outside piston, one groove for the blade embedding was set on week, on piston, has the hole that groove deepest part and oil supply gallery are linked.Contacting between piston and blade becomes the face contact, and the spin of piston also suffers restraints, thereby has reached the condition of Stable sliding.Simultaneously again can be by oil supply gallery and hole to the contacting part fuel feeding between piston and blade.According to described structure, this rotary compressor also exists following defect: 1, for fear of blade, break away from the groove on the outside piston side face, the required elastic force of spring is larger, more than the elastic force rigidity of this rotary compressor spring is estimated to be controlled at 20Kg/ ㎜.Produce thus series of problems: as blade, piston pressure is increased, need to supply between oil lubrication, piston and eccentric part frictional force increase and compressor efficiency greatly to reduce etc. at the contacting part between piston and blade.2, the contacting part between piston and blade needs fuel feeding, namely has oil supply system, causes compressor arrangement complexity and parts machining more difficult, and cost is higher.
Summary of the invention
The objective of the invention is to have the problems referred to above for existing technology, proposed a kind of rotary translation piston compressor, the technical problem to be solved in the present invention is how to reduce spring force and increase work efficiency.
Purpose of the present invention can realize by following technical proposal: a kind of rotary translation piston compressor, comprise the cylinder with piston cavity and the bent axle with eccentric part, and eccentric part is positioned at piston cavity; Described cylinder blade groove has blade; It is characterized in that, on described eccentric part, cover has a piston, by rolling bearing assembly, is connected between eccentric part outer side surface and piston inner side surface; On described outside piston side face, have the concave circular arc groove that be strip parallel with the piston bus; Described blade end face is the dome arc-shaped curved surface; Described blade arc top embeds in the concave circular arc groove of piston, leans at spring-force driven dual lower blade end face and concave circular arc groove groove face.
During this rotary translation piston compressor work, crankshaft rotating, eccentric part produces frictional force to piston makes piston have rotation trend.Due between eccentric part and piston, be connected by rolling bearing assembly, form rolling friction, namely between eccentric part and piston inner hole, frictional force is minimum.Only rely on the frictional force between outside piston and cylinder bores just can stop the piston rotation.Blade embeds in the concave circular arc groove, and blade produces pressure to piston under the elastic force effect of spring, and then overcomes the frictional force that eccentric part is passed to piston fully, guarantees that piston does not rotate; The required generation rotational resistance of blade and piston is also less, and in other words, blade is also less to the pressure of the required generation of piston, and namely the required spring elastic force that can produce is less.
In above-mentioned rotary translation piston compressor, described rolling bearing assembly comprises some needle rollers and by the retainer of needle roller location, needle roller relies on the eccentric part outer peripheral surface; All needle rollers circumferentially are uniformly distributed with respect to eccentric part.Adopt needle roller can effectively guarantee the axial contact length between rolling bearing assembly and piston and eccentric part, especially guarantee the stability of piston movement.According to described structure, rolling bearing assembly does not comprise outer ring and inner ring, guarantees that rolling bearing assembly is arranged between eccentric part and piston on the basis that does not substantially change eccentric part diameter and piston external diameter.
In above-mentioned rotary translation piston compressor, the length L of described needle roller is
Wherein H is the height of piston.
In above-mentioned rotary translation piston compressor, described rolling bearing assembly comprises several balls and the retainer that ball is located; On the eccentric part outer peripheral surface with on the piston inner peripheral surface, all have the circular orientation ditch corresponding with the ball position.
In above-mentioned rotary translation piston compressor, in described bent axle, be provided with vertically oil supply gallery, on described eccentric part outer peripheral surface, offer the oil outlet be connected with oil supply gallery.During this rotary translation piston compressor work, lubricant oil feeds passage and drains between eccentric part and piston from oil outlet; The lubricant oil namely fed is all lubricated the rubbing surface that rolling bearing assembly is associated, and guarantees its working life.
Material that piston adopts is through comprehensive consideration cost of production, production method, wear resistance and select after working life.In above-mentioned rotary translation piston compressor, described piston adopts the 20CrMnTi material to make and the piston face via nitride is processed.20CrMnTi is applicable to cold working, and namely piston adopts cold extrusion shaped; 20CrMnTi is applicable to surface treatment, after via nitride is processed, has excellent wear resistance and the characteristic of fatigue resistance; The piston inner peripheral surface meets rolling friction between the roller of rolling bearing assembly and piston thus; The outside piston side face meets the blade end face and concave circular arc groove groove face swings friction.
In above-mentioned rotary translation piston compressor, described piston adopts low-alloy cast iron to make and through Overheating Treatment, piston face hardness is HRc46～51.20CrMnTi and the low-alloy cast iron prices of raw and semifnished materials are low.By heat treatment, improving piston face hardness makes piston meet the requirement in working life.
In above-mentioned rotary translation piston compressor, on described piston, offer an oil through along its radial line perforation, a port of oil through is positioned on concave circular arc groove groove face.
In above-mentioned rotary translation piston compressor, on described piston, offer an oil through along its radial line perforation, on concave circular arc groove groove face, have an oil groove, the vertical line of the vertical line of oil groove and concave circular arc groove is intersected; One port of oil through is positioned on concave circular arc groove groove face and oil through is connected with oil groove.
In above-mentioned rotary translation piston compressor, described concave circular arc groove radius R
GrooveValue range is R
Leaf+ 0.1 ㎜<R
Groove<R
Leaf+ 0.3 ㎜; R wherein
LeafFor blade dome arc-shaped curved surface radius.
The radius difference of blade and piston concave circular arc groove is minimum, make and between blade and piston, be equivalent to arc surface and contact, make between piston and blade to be sealed into the arc surface sealing, and then reduce gas during this rotary translation piston compressor work and leak between piston and blade, improve the working efficiency of compressor.Between blade and piston, contact gap is very little simultaneously, and pressurized gas reduce the additional force of blade R face, makes to reduce along the component of blade glide direction, and then can allow the elastic force of spring to reduce.
In above-mentioned rotary translation piston compressor, described concave circular arc groove width of rebate W
GrooveValue range is W
Leaf+ 1 ㎜<W
Groove<W
Leaf+ 1.5 ㎜; W wherein
LeafFor vane thickness.Above-mentioned parameter guarantees that blade dome arc-shaped curved surface is positioned at piston concave circular arc groove substantially, and while guaranteeing to swing blade dome arc-shaped curved surface knuckle line within piston concave circular arc groove notch.
Compared with prior art, during this rotary translation piston compressor work, piston does not rotate and only moves up and down and the swing of small angle ground, is equivalent to translation.Between piston and crankshaft eccentric section, adopt rolling bearing assembly to be connected, the frictional force between reduction crankshaft eccentric section and piston.
On the outside piston side face, offer the concave circular arc groove, blade embeds in the concave circular arc groove, increases thus the rotational resistance that blade produces piston, and while guaranteeing compressor operating, piston does not rotate.
This rotary translation piston compressor is applied in 1～1.5HP air-conditioning, and the elastic force rigidity of spring only needs to be controlled at 2～4Kg/ ㎜, even less.Namely reduce the pressure of blade to piston, make between radial force reduction, blade and piston that rolling bearing assembly is subject to and between piston and eccentric part frictional force reduce; And then guarantee the working life of all parts and reduce power loss, realize improving the high workload efficiency of compressor; Reach purpose energy-conservation and consumption reduction.
The accompanying drawing explanation
Fig. 1 is this rotary translation piston compressor compressing mechanism structure cross-sectional schematic.
Fig. 2 is this another visual angle sectional structure schematic diagram of rotary translation piston compressor compressing mechanism.
Fig. 3 is the structure enlarged view at circle A place in Fig. 2.
Fig. 4 is the structural representation that this rotary translation piston compressor has oil through.
Fig. 5 is the structural representation that this rotary translation piston compressor has oil through and oil groove.
Fig. 6 is the another kind of structure structural representation of this rotary translation piston compressor compressing mechanism.
Fig. 7 is the sectional structure schematic diagram of existing rotary translation piston compressor.
Fig. 8 is existing rotary translation piston compressor compressing mechanism sectional structure schematic diagram.
In figure, 101, bent axle; 102, eccentric part; 103, motor; 104, cylinder; 105, blade; 106, piston; 107, suction chamber; 108, discharge side; 109, suction port; 110, exhaust port; 111, spring; 1, cylinder cap; 2, piston cavity; 3, needle roller; 4, retainer; 5, ball; 6, oil supply gallery; 7, oil outlet; 8, concave circular arc groove; 9, oil through; 10, oil groove.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1 to Figure 3, this rotary translation piston compressor comprises motor 103, cylinder 104, cylinder cap 1, bent axle 101, blade 105, spring 111 and rolling bearing assembly.
Bent axle 101 is positioned on cylinder cap 1, and bent axle 101 has eccentric part 102, and eccentric part 102 is positioned at piston cavity 2.Bent axle 101 is connected with motor 103, and during motor 103 operation, band dynamic crankshaft 101 rotates.
In cylinder 104, have a blade groove, blade groove is connected with piston cavity 2, and blade 105 is embedded in blade groove, and blade 105 is positioned in cylinder 104 thus, and blade 105 is along the to-and-fro motion of blade groove energy.
Piston 106 is cylindric, and piston 106 also is positioned at piston cavity 2, and piston 106 is enclosed within on eccentric part 102; Between eccentric part 102 outer side surfaces and piston 106 inner side surfaces, leave the rolling bearing assembly assemblage gap.As preferably, for life-span and the versatility that guarantees product, piston 106 external diameters are as far as possible identical with the existing standard size of components with eccentric part 102 diameters; And piston 106 wall thickness are greater than and the be complementary wall thickness of outer ring of rolling bearing assembly.
Rolling bearing assembly stays between above-mentioned eccentric part 102 outer side surfaces and piston 106 inner side surfaces rolling bearing assembly assemblage gap, make by rolling bearing assembly, to be connected between eccentric part 102 outer side surfaces and piston 106 inner side surfaces.Specifically, rolling bearing assembly comprises some needle rollers 3 and the retainer 4 that needle roller 3 is located, and needle roller 3 relies on eccentric part 102 outer peripheral surfaces; All needle rollers 3 circumferentially are uniformly distributed with respect to eccentric part 102.Needle roller 3 diameters and rolling bearing assembly assemblage gap size adapt.As preferably, the length L of the needle roller 3 of rolling bearing assembly is
Wherein H is the height of piston 106.
According to actual conditions, rolling bearing assembly can adopt following structure to replace: as shown in Figure 6, rolling bearing assembly comprises several balls 5 and the retainer 4 that ball 5 is located; On eccentric part 102 outer peripheral surfaces with on piston 106 inner peripheral surfaces, all have the circular orientation ditch corresponding with ball 5 positions.Piston 106, eccentric part 102 and rolling bearing assembly form deep groove ball bearing, have advantages of that bearing capacity is high.As preferably, along piston 106, two groups of rolling bearing assemblies are set axially, this structure had both guaranteed bearing capacity and working life effectively, avoided again piston 106 to swing with respect to eccentric part 102.
In order further to guarantee in the bent axle 101 of compressor, to be provided with vertically oil supply gallery 6 working life of the parts such as rolling bearing assembly and piston 106, on eccentric part 102 outer peripheral surfaces, offer the oil outlet 7 be connected with oil supply gallery 6.During this rotary translation piston compressor work, lubricant oil feeds oil supply gallery 6 and drains between eccentric part 102 and piston 106 from oil outlet 7; The lubricant oil namely fed is all lubricated the rubbing surface that rolling bearing assembly is associated, and guarantees its working life.This compressor is also carried lubricant oil by this oil supply gallery 6 to cylinder cap 1 and bent axle 101 junction planes simultaneously.
As preferably, piston 106 adopts steel for carburizing 20CrMnTi to make and the surperficial via nitride of piston 106 is processed.According to actual conditions, the making material of piston 106 can adopt low-alloy cast iron replace but simultaneously piston 106 also to need to make piston 106 surface hardnesses through Overheating Treatment be HRc46～51.
As shown in Figures 2 and 3, on piston 106 outer peripheral surfaces, have the concave circular arc groove 8 that be strip parallel with the piston bus; The cross section that is groove face is a circular arc line.Concave circular arc groove 8 axially connects along piston 106.Blade 105 end faces are the dome arc-shaped curved surface; Blade 105 width and piston 106 highly adapt.Spring 111 is arranged in cylinder 104, and an end of spring 111 and blade 105 bottom surfaces lean, and the other end and compressor housing lean.Blade 105, under the compressing of spring 111, embeds in piston 106 concave circular arc grooves 8 blade 105 top R faces, and blade 105 end faces and concave circular arc groove 8 groove faces lean.
During this rotary translation piston compressor work, motor 103 band dynamic crankshaft 101 rotations, crankshaft eccentric section 102 is with respect to cylinder 104 rotations, and piston 106 is relative and cylinder 104 does not rotate, only do translation up and down, i.e. relatively translation of piston 106 and then promotion blade 105 are along blade groove to-and-fro motion and the past compound compression of spring 111 and extension.Concave circular arc groove 8 groove faces of piston 106 and blade 105 end face R faces swing.
Through overtesting, between blade 105 and piston 106, between piston 106 and cylinder 104, between piston 106 and upper and lower cylinder cap 1, the fuel feeding by bent axle mesopore screw piece when the work just can meet the requirement in working life.
Consider to use from now on new cooling media, in the situations such as R410a, working pressure is higher, and working load is heavier, and wearing and tearing can be more serious.For guaranteeing that the compressor life-span is in allowed band, as shown in Figure 4, on piston, offer an oil through 9 along its radial line perforation, a port of oil through 9 is positioned on concave circular arc groove groove face.According to actual conditions, can adopt following structure to replace: as shown in Figure 5, on piston, offer an oil through 9 along its radial line perforation, on concave circular arc groove groove face, have an oil groove 10, the vertical line of the vertical line of oil groove 10 and concave circular arc groove is intersected; One port of oil through 9 is positioned on concave circular arc groove groove face and oil through 9 is connected with oil groove 10.Oil through 9 communicates with the eccentric part gap with piston, makes the lubricating condition of piston concave circular arc groove and blade R face better.
As preferably, concave circular arc groove 8 radius Rs
GrooveValue range is R
Leaf+ 0.1 ㎜<R
Groove<R
Leaf+ 0.3 ㎜; R wherein
LeafFor blade 105 dome arc-shaped curved surface radiuses.Blade 105 is minimum with the radius difference of piston 106 concave circular arc grooves 8, guarantee that blade 105 dome arc-shaped curved surfaces are fully in piston 106 concave circular arc grooves 8 and make and between blade 105 and piston 106, be equivalent to arc surface and contact, make between piston 106 and blade 105 to be sealed into the arc surface sealing, and then reduce gas between piston 106 and blade 105, leaking, the raising compressor efficiency during this rotary translation piston compressor work.Between blade 105 and piston 106, contact gap is very little simultaneously, and pressurized gas reduce the additional force of blade 105R face, makes to reduce along the component of blade 105 glide directions, and then can allow the elastic force of spring 111 to reduce.
Concave circular arc groove 8 width of rebate W
GrooveValue range is W
Leaf+ 1 ㎜<W
Groove<W
Leaf+ 1.5 ㎜; W wherein
LeafFor blade 105 thickness.Concave circular arc groove 8 width of rebate are slightly larger than blade 105 thickness, while guaranteeing 106 swing of ordinary circumstance lower piston, blade 105 dome arc-shaped curved surface knuckle lines are within piston 106 concave circular arc groove 8 notches, pressurized gas are reduced the additional force of blade 105R face, make to reduce along the component of blade 105 glide directions, and then can allow the elastic force of spring 111 to reduce, be conducive to the raising of compressor efficiency.
Claims (10)
1. rotary translation piston compressor, comprise have piston cavity (2) cylinder (104) and have the bent axle (101) of eccentric part (102), eccentric part (102) is positioned at piston cavity (2); In described cylinder (104), be positioned with blade (105); It is characterized in that, the upper cover of described eccentric part (102) has piston (106), by rolling bearing assembly, is connected between eccentric part (102) cylindrical and piston (106) endoporus; On described piston (106) outer peripheral surface, have the concave circular arc groove (8) that is strip parallel with the piston bus; Described blade (105) R end face is the dome arc-shaped curved surface; In described cylinder (104), be provided with and make blade (105) top embed in concave circular arc groove (8) and spring (111) that blade (105) end face and concave circular arc groove (8) groove face lean.
2. rotary translation piston compressor according to claim 1, is characterized in that, described rolling bearing assembly comprises some needle rollers (3) and by the retainer (4) of needle roller (3) location, needle roller (3) relies on eccentric part (102) outer peripheral surface; All needle rollers (3) circumferentially are uniformly distributed with respect to eccentric part (102).
3. rotary translation piston compressor according to claim 2, is characterized in that, the length L of described needle roller (3) is
Wherein H is the height of piston (106).
4. rotary translation piston compressor according to claim 1, is characterized in that, described rolling bearing assembly comprises several balls (5) and the retainer (4) that ball (5) is located; On eccentric part (102) outer peripheral surface with on piston (106) inner peripheral surface, all have the circular orientation ditch corresponding with ball (5) position.
5. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that, in described bent axle (101), be provided with vertically oil supply gallery (6), on described eccentric part (102) outer peripheral surface, offer the oil outlet (7) be connected with oil supply gallery (6).
6. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that, described piston (106) adopts the 20CrMnTi material to make and the surperficial via nitride of piston (106) is processed.
7. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that, described piston (106) adopts low-alloy cast iron to make and through Overheating Treatment, piston (106) surface hardness is HRc46～51.
8. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that, on described piston (106), offer an oil through (9) along its radial line perforation, a port of oil through (9) is positioned on concave circular arc groove (8) groove face.
9. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that, on described piston (106), offer an oil through (9) along its radial line perforation, on concave circular arc groove (8) groove face, have an oil groove (10), the vertical line of oil groove (10) and the vertical line of concave circular arc groove are intersected; One port of oil through (9) is positioned on concave circular arc groove (8) groove face and oil through (9) is connected with oil groove (10).
10. according to the described rotary translation piston compressor of any one in claim 1 to 4, it is characterized in that described concave circular arc groove (8) radius R
GrooveValue range is R
Leaf+ 0.1 ㎜<R
Groove<R
Leaf+ 0.3 ㎜; R wherein
LeafFor blade (105) dome arc-shaped curved surface radius; Described concave circular arc groove (8) width of rebate W
GrooveValue range is W
Leaf+ 1 ㎜<W
Groove<W
Leaf+ 1.5 ㎜, wherein W
LeafFor blade (105) thickness.
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Cited By (10)
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| CN103644117A (en) * | 2013-12-27 | 2014-03-19 | 浙江百达精工股份有限公司 | Rotary translation piston compressor |
| CN105864048A (en) * | 2016-06-16 | 2016-08-17 | 珠海格力电器股份有限公司 | Rotor compressor and rotor assembly thereof |
| CN106382226A (en) * | 2016-11-30 | 2017-02-08 | 浙江海洋大学 | Translation piston compressor with improved structure |
| CN107387416A (en) * | 2017-07-28 | 2017-11-24 | 广东美芝制冷设备有限公司 | Pump assembly, compressor and air conditioner |
| CN107420309A (en) * | 2017-08-30 | 2017-12-01 | 广东美芝制冷设备有限公司 | Rotary compressor piston and preparation method thereof |
| CN107605728A (en) * | 2017-10-20 | 2018-01-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body structure and there is its compressor |
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| CN109356855A (en) * | 2018-11-06 | 2019-02-19 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of refrigeration equipment and its compressor |
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| CN107420309A (en) * | 2017-08-30 | 2017-12-01 | 广东美芝制冷设备有限公司 | Rotary compressor piston and preparation method thereof |
| CN107605728A (en) * | 2017-10-20 | 2018-01-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body structure and there is its compressor |
| CN107605728B (en) * | 2017-10-20 | 2023-08-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump body structure and compressor with same |
| CN108087283A (en) * | 2018-01-18 | 2018-05-29 | 珠海凌达压缩机有限公司 | Crankshaft roller structure, compressor and air conditioner |
| CN108119368A (en) * | 2018-01-18 | 2018-06-05 | 珠海凌达压缩机有限公司 | Crankshaft roller structure, compressor and air conditioner |
| CN109356855A (en) * | 2018-11-06 | 2019-02-19 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of refrigeration equipment and its compressor |
| CN109356855B (en) * | 2018-11-06 | 2024-06-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Refrigerating equipment and compressor thereof |
| CN112377514A (en) * | 2020-11-11 | 2021-02-19 | 浙江百达精工股份有限公司 | Crankshaft blank, crankshaft blank assembling method and crankshaft blank batch manufacturing method |
| CN112377514B (en) * | 2020-11-11 | 2024-06-04 | 浙江百达精工股份有限公司 | Batch manufacturing method for compressor crankshaft blanks |
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