CN108825497A

CN108825497A - Rotary compressor, gas compression system, refrigeration system and heat pump system

Info

Publication number: CN108825497A
Application number: CN201810557440.5A
Authority: CN
Inventors: 蒋君之; 李盖敏; 朱运农; 李华明; 陈中贵
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2018-06-01
Filing date: 2018-06-01
Publication date: 2018-11-16
Anticipated expiration: 2038-06-01
Also published as: CN108825497B

Abstract

The invention discloses a kind of rotary compressor, gas compression system, refrigeration system and heat pump system, the rotary compressor includes：Cylinder, crankshaft, piston, base bearing, supplementary bearing, slide plate and swinging block, the piston is set in outside the eccentric part of the crankshaft, and the piston is rotatably provided in the cylinder, it is equipped between the eccentric part of the crankshaft and the piston for limiting the retaining structure for generating circumferentially opposed movement between the crankshaft and the piston, the cylinder is equipped with sliding vane groove, the slide plate is installed on the sliding vane groove, the apex of the swinging block and the slide plate is hinged around first axle, the first axle is parallel with the axis of the cylinder, the swinging block compresses the periphery of the piston.Rotary compressor of the invention improves the lubricating status between slide plate and cam part friction pair, greatly reduces the friction power loss between slide plate cam part friction pair, and can be effectively reduced between the eccentric part of crankshaft and piston and generate friction loss.

Description

Rotary compressor, gas compression system, refrigeration system and heat pump system

Technical field

The invention belongs to compressor manufacturing technical fields, in particular to a kind of rotary compressor, have the rotation The gas compression system of formula compressor, the refrigeration system with the rotary compressor and the heat pump with the rotary compressor System.

Background technique

In compressor means, the friction loss between the apex of slide plate and the periphery of piston is larger.In order to reduce this Friction loss installs needle roller in the apex of slide plate, the purpose of the structure is by the sliding between piston and slide plate in the related technology Friction becomes rolling friction, and friction power loss is effectively reduced.But requirement of the needle roller structure to reliability is high, due to needle roller Contact stress between piston sharply becomes larger, and proposes challenge to the wearability of needle roller material, and needle roller structure is easy Existing needle roller rolls the risk of stuck failure, once needle roller rolls failure, needle roller will occur sharply to wear, until compressor is stuck Failure, there are rooms for improvement.

Summary of the invention

The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention proposes a kind of rotation The secondary friction power loss of slide plate cam part friction of rotary compressor, the rotary compressor is small.

Rotary compressor according to an embodiment of the present invention, including：Cylinder, crankshaft, piston, base bearing, supplementary bearing, slide plate And swinging block, the piston are set in outside the eccentric part of the crankshaft, and the piston is rotatably provided in the cylinder, it is described It is equipped between the eccentric part of crankshaft and the piston and generates circumferentially opposed movement between the crankshaft and the piston for limiting Retaining structure, the cylinder is equipped with sliding vane groove, and the slide plate is installed on the sliding vane groove, the elder generation of the swinging block and the slide plate End is hinged around first axle, and the first axle is parallel with the axis of the cylinder, and the swinging block compresses the outer circle of the piston Face.

Rotary compressor according to an embodiment of the present invention significantly improves slide plate apex and cam part outer circle face contact Stress, improve the lubricating status between slide plate and cam part friction pair, greatly reduce slide plate cam part friction pair Between friction power loss, and can be effectively reduced between the eccentric part of crankshaft and piston and generate friction loss.

Rotary compressor according to an embodiment of the invention, the retaining structure include keyway and key, the key peace Loaded on the keyway, the keyway is set to the eccentric part periphery wall and the piston internal perisporium of the crankshaft.

Rotary compressor according to an embodiment of the invention, the keyway is two on the piston and the crankshaft At least one of part part is blind hole, and the distance of lower end to the lower end surface of the piston is h1, is met：h1≥1mm.

Rotary compressor according to an embodiment of the invention, the upper surface of the key are lower than the upper end of the piston Face, and the spacing of the upper surface of the key and the upper surface of the piston is h1, is met：h1≥0.005mm.

Rotary compressor according to an embodiment of the invention, spindle axis of the keyway apart from the crankshaft is most Big distance is L1, and the spindle axis of gas vent crankshaft described in the projector distance of the end face of the cylinder of the base bearing is most Closely it is L2, meets：L2-L1≥0.2mm.

Rotary compressor according to an embodiment of the invention, the keyway and the key clearance fit, and along described The total backlash in piston radial direction is S1, and the total backlash between the eccentric part of the crankshaft and the piston is S2, meets relationship Formula S1 > S2.

Rotary compressor according to an embodiment of the invention, the retaining structure include that groove protrudes into the groove One in the periphery wall of the eccentric part of boss, the internal perisporium of the piston and the crankshaft is equipped with the groove, another sets There is the boss.

The invention also provides a kind of gas compression systems, with rotary compressor described in any of the above-described kind.

The invention also provides a kind of refrigeration systems, with rotary compressor described in any of the above-described kind.

The invention also provides a kind of heat pump systems, with rotary compressor described in any of the above-described kind.

The gas compression system, the refrigeration system, the heat pump system and above-mentioned rotary compressor relative to Advantage possessed by the prior art is identical, and details are not described herein.

Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, wherein：

Fig. 1 is the structural schematic diagram of rotary compressor according to an embodiment of the present invention；

Fig. 2 is end view drawing of the rotary compressor according to an embodiment of the present invention at cylinder；

Fig. 3 is the partial enlarged view in Fig. 2 at A；

Fig. 4-Fig. 7 is the structural schematic diagram of swinging block according to an embodiment of the present invention；

Fig. 8-Fig. 9 is the structural schematic diagram of slide plate according to an embodiment of the present invention；

Figure 10-Figure 13 is the structural schematic diagram of slide plate according to an embodiment of the present invention and swinging block cooperation；

Figure 14 is cross-sectional view of the rotary compressor according to an embodiment of the invention at cylinder；

Figure 15 is the cross-section diagram in Figure 14 at X-X；

Figure 16 is cross-sectional view of the rotary compressor in accordance with another embodiment of the present invention at cylinder；

Figure 17 is cross-sectional view of the rotary compressor of another embodiment according to the present invention at cylinder；

Figure 18 is cross-sectional view of the rotary compressor of further embodiment according to the present invention at cylinder；

Figure 19 is the partial enlarged view in Figure 18 at B；

Figure 20-Figure 21 is the structural schematic diagram of slide plate according to an embodiment of the present invention；

Figure 22-Figure 23 is the structural schematic diagram of supplementary bearing according to an embodiment of the present invention；

Figure 24-Figure 33 is the connection procedure schematic diagram of swinging block according to an embodiment of the present invention；

Figure 34 is the graph of relation of the COP and (r1-r2)/r2 of rotary compressor according to an embodiment of the present invention；

Figure 35 is the graph of relation of the COP and t2/t1 of rotary compressor according to an embodiment of the present invention.

Appended drawing reference：

Cylinder 10, projection 11 of the gas vent of base bearing in the end face of cylinder, notch 12, sliding vane groove 13,

Base bearing 21, supplementary bearing 22, oil supply gallery 23,

Cam mechanism 30, crankshaft 31, piston 32, keyway 33, key 34, boss 35,

Slide plate 40, open slot 41, guide groove 42, diversion trench 43, slide plate interconnecting piece 46,

Swinging block 50, the first sub- swinging block 51, hinged face 52, the first welding surface 53, the second sub- swinging block 54 compress face 55, swinging block Interconnecting piece 56, the second welding surface 57,

Rotor 61, stator 62, body 71, upper housing 72, lower case 73.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.

Embodiment one

Rotary compressor according to embodiments of the present invention is described below with reference to Fig. 1-Figure 35, which includes： Casing, stator 62, rotor 61, cam mechanism 30, cylinder 10, base bearing 21, supplementary bearing 22, slide plate 40 and swinging block 50.

Wherein, with reference to Fig. 1, casing may include body 71, upper housing 72, lower case 73, stator 62, rotor 61, cam Mechanism 30, cylinder 10, base bearing 21, supplementary bearing 22, slide plate 40 and swinging block 50 may be mounted in casing.

Rotor 61 is connected with cam mechanism 30, rotates for driving cam means 30, base bearing 21, supplementary bearing 22 are set respectively Limit compression chamber between the upper and lower surfaces of cylinder 10, cylinder 10, base bearing 21 and supplementary bearing 22, cam mechanism 30 it is convex Wheel portion is rotatably provided in cylinder 10.

As shown in Fig. 2, piston 32 is set in crankshaft 31 in the embodiment that cam mechanism 30 includes crankshaft 31 and piston 32 Eccentric part outside, the cam part of cam mechanism 30 includes piston 32, and piston 32 is rotatably provided in cylinder 10, and piston 32 exists It is rotatably fitted in compression chamber under the driving of crankshaft 31.Certainly, cam mechanism 30 or integral type.

As shown in Fig. 2, cylinder 10 is equipped with sliding vane groove 13, slide plate 40 is installed on sliding vane groove 13, the elder generation of swinging block 50 and slide plate 40 End is hinged around first axle, and first axle is parallel with the axis of cylinder 10, and swinging block 50 compresses the periphery of cam part, in the rotation It in formula compressor operation, is slidably matched between swinging block 50 and the periphery of cam part, forms sliding friction pair.

It should be noted that the apex of slide plate 40 refers to that slide plate 40 extend into the cam part in compression chamber close to cam mechanism 30 One end of the periphery of (piston 32).One end of swinging block 50 and the apex of slide plate 40 offset, the other end and cam machine of swinging block 50 The periphery of the cam part (piston 32) of structure 30 offsets.Swinging block 50, which has, compresses face 55, compresses the outer circle that face 55 compresses cam part Face compresses the width that face 55 is greater than the apex of slide plate 40 along the width of the periphery circumferential direction of cam part.

In the rotary compressor course of work, slide plate 40 is reciprocating along sliding vane groove 13, and swinging block 50 compresses convex always The periphery of wheel portion (piston 32), swinging block 50 are swung around first axle relative to slide plate 40, and swinging block 50 is being parallel to 10 end of cylinder The direction in face is swung.

It is understood that by between slide plate 40 and cam part be arranged swinging block 50, can substantially reduce slide plate 40 with Contact stress between cam part, lubricating status become hydrldynamic pressure lubrication from original boundary lubrication substantially, and friction power loss obtains Cooling capacity leakage to being effectively reduced, and between slide plate 40 and cam part also reduces.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, but also its reliability is greatly improved, and the structure of the swinging block 50 is simple, at low cost Honest and clean, effect is good.

Embodiment two

In the friction pair that the periphery of friction pair, swinging block 50 and cam part that slide plate 40 and swinging block 50 are formed is formed at least One surface is provided with self-lubricating coat in use.For example the surface of slide plate 40 cooperated with swinging block 50 can be equipped with self-lubricating coat in use, or The surface of person's swinging block 50 cooperated with slide plate 40 can be equipped with self-lubricating coat in use or swinging block 50 with the periphery of cam part The periphery that surface is equipped with self-lubricating coat in use or cam part is equipped with self-lubricating coat in use, in aforementioned four surface, can be wherein There is self-lubricating coat in use on one surface, and perhaps there is self-lubricating coat in use on wherein two surface or wherein there is self-lubricating painting on three surfaces Layer, or wherein there is self-lubricating coat in use on four surfaces.In a specific embodiment, the both ends of swinging block 50 are equipped with from profit Sliding coating, the process that can reduce coating self-lubricating coat in use in this way simplify processing flow.

The material of self-lubricating coat in use is at least one of Teflon, molybdenum disulfide, tungsten disulfide, polyimides, graphite. The technology mode of self-lubricating coat in use is at least one of spraying, dipping, deposition, plating, coating.

Self-lubricating coat in use, which can improve, lubricates insufficient state between above-mentioned friction pair, reaches reduction friction power loss, Er Qiezeng The strong effect for the secondary initial stage adjustment that rubs, greatly reduces the failure rate of rotary compressor initial stage operating.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, but also its reliability is greatly improved, and is arranged self-lubricating coat in use, not only reduces rotation The friction power loss of rotary compressor, and help to reduce the incipient failure rate of rotary compressor, and the structure of the swinging block 50 Simply, low in cost, effect is good.

Embodiment three

It is rotary according to embodiments of the present invention below with reference to Fig. 1-Fig. 4, Fig. 6, Fig. 8-Figure 10, Figure 12, Figure 14-Figure 35 description Compressor, the rotary compressor include：Casing, stator 62, rotor 61, cam mechanism 30, cylinder 10, base bearing 21, countershaft Hold 22, slide plate 40 and swinging block 50.

As shown in figs 2-4, cylinder 10 is equipped with sliding vane groove 13, and slide plate 40 is installed on sliding vane groove 13, swinging block 50 and slide plate 40 Apex it is hinged around first axle, first axle is parallel with the axis of cylinder 10, swinging block 50 have compresses face 55, compress face 55 and support The periphery of belling wheel portion, and the periphery inscribe in face 55 Yu cam part is compressed, in the rotary compressor course of work, support It is slidably matched between pressure surface 55 and the periphery of cam part, forms sliding friction pair.

It is understood that by between slide plate 40 and cam part be arranged swinging block 50, can substantially reduce slide plate 40 with Contact stress between cam part, the contact between slide plate 40 and cam part become inscribe from original circumscribed contact and contact, profit Sliding state becomes hydrldynamic pressure lubrication from original boundary lubrication substantially, and friction power loss is effectively reduced, and slide plate 40 with Cooling capacity leakage between cam part also reduces.

Since the face 55 that compresses of swinging block 50 is arc-shaped, and the periphery inscribe in face 55 Yu cam part is compressed, in this way, swinging block 50 compress is easily formed oil film between face 55 and the periphery of cam part, and can maintain enough oil film thicknesses, so as to To effectively reduce the contact area between swinging block 50 and the periphery of cam part, and then the friction damage of friction pair is effectively reduced It loses.

Compressing face 55 is the arc surface that radius is r1, and the radius of the periphery of cam part is r2.

Inventor is had found by many experiments, for the rotary compressor of the embodiment of the present invention, works as satisfaction：0.01%≤ (r1-r2)/r2 when, compressing for swinging block 50 is easily formed oil film between face 55 and the periphery of cam part, and can maintain enough Oil film thickness, so as to effectively reduce the contact area between swinging block 50 and the periphery of cam part, and then be effectively reduced The friction loss of friction pair.

Inventor passes through many experiments discovery, relation curve such as Figure 34 of the COP of rotary compressor and (r1-r2)/r2 Shown, when (r1-r2)/r2 is too small, gap is too small between swinging block 50 and the periphery of cam part, and lubricating oil not easily passs through the gap Oil film is generated in engaging friction is secondary, is had an adverse effect to COP；(r1-r2) oil film bearing capacity when/r2 is excessive, in friction pair Decline also results in the by-produced metal contact of friction, has an adverse effect to COP.

Work as satisfaction：When 0.01%≤(r1-r2)/r2≤1%, such as (r1-r2)/r2=0.05%, or (r1-r2)/ R2=0.1%, or (r1-r2)/r2=0.5%, compressing for swinging block 50 are easily formed between face 55 and the periphery of cam part Oil film, and enough oil film thicknesses can be maintained, so as to effectively reduce connecing between swinging block 50 and the periphery of cam part Contacting surface product, and then the friction loss of friction pair is effectively reduced.

The area for compressing face 55 on increasing swinging block 50 can further decrease and compress face 55 and cam part on swinging block 50 Face pressure between periphery further decreases the outer circle for compressing face 55 and cam part on swinging block 50 to increase oil film thickness Contact area between face reduces the friction loss of friction pair.

To increase the area for compressing face 55 on swinging block 50, then need to increase the width for compressing face 55.To avoid compressor When operation, the sliding vane groove 13 of swinging block 50 and cylinder 10 generates interference, needs to open up on 10 sliding vane groove of cylinder, 13 corresponding position scarce Mouth 12, if the notch 12 is provided at the corresponding sliding vane groove 13 of exhaust side, can generate clearance volume, the high pressure after having compressed Refrigerant can remain in the escape groove, and 10 internal volume of cylinder is occupied after expansion, inspiratory capacity be reduced, to reduce compressor efficiency.

The width for compressing face 55 is wider, then 12 volume of notch for needing to open up on 10 exhaust side sliding vane groove 13 of cylinder is bigger, Clearance volume is bigger, and compressor efficiency caused by clearance volume influences bigger.

The width for compressing face 55 is wider, and the oil film thickness compressed between face 55 and the periphery of cam part is thicker, and oil film is thick After degree reaches the metal contact avoided completely enough between the friction pair to a certain degree, the width in the face of compressing 55 is further increased The viscous loss that the oil film between friction pair can be increased instead, reduces the efficiency of compressor.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching, improves the lubricating status between slide plate 40 and cam part friction pair, and swinging block 50 compresses face 55 and cam part It is easily formed oil film between periphery, and enough oil film thicknesses can be maintained, so as to effectively reduce swinging block 50 and cam Contact area between the periphery in portion, and then the friction loss of friction pair is effectively reduced.

In some embodiments, slide plate 40 with a thickness of t1, width of the swinging block 50 at the face that compresses 55 is t2, in other words, One end width that swinging block 50 and the periphery of cam part offset is t2.

Inventor has found that the relation curve of the COP and t2/t1 of rotary compressor are as shown in figure 35 by many experiments, For the rotary compressor of the embodiment of the present invention, work as satisfaction：When 0.5≤t2/t1≤3, the COP of compressor is larger.Such as t2/ T1=1 perhaps t2/t1=1.5 perhaps t2/t1=2 or t2/t1=2.5.

Example IV

As shown in Fig. 2-Fig. 3, cylinder 10 is equipped with sliding vane groove 13, and slide plate 40 is installed on sliding vane groove 13, such as Fig. 3-Figure 13 institute Show, one in slide plate 40 and swinging block 50 is equipped with the open slot 41 of arc, another in slide plate 40 and swinging block 50 includes arc Hinged face 52, hinged face 52 is hinged around first axle with open slot 41, and first axle is parallel with the axis of cylinder 10, swinging block 50 The periphery for compressing cam part slides between swinging block 50 and the periphery of cam part in the rotary compressor course of work Cooperation forms sliding friction pair.

In the embodiment shown in Fig. 3-Fig. 5, Fig. 8, Figure 10, Figure 11, the apex of slide plate 40 is equipped with the open slot 41 of arc, Swinging block 50 includes the hinged face 52 of arc, and swinging block 50 may include cylindrical or the cylindrical articulated joint of fan, and hinged face 52 is hinged The open slot 41 of the part peripheral wall of head, articulated joint and 40 apex of slide plate is hinged.

In the embodiment shown in Fig. 6-Fig. 7, Fig. 9, Figure 12, Figure 13, the apex of slide plate 40 is equipped with the hinged face 52 of arc, Swinging block 50 includes the hinged face 52 of arc, and slide plate 40 may include cylindrical or the cylindrical articulated joint of fan, and hinged face 52 is hinged The open slot 41 of the part peripheral wall of head, articulated joint and swinging block 50 is hinged.

When the rotary compressor works, under the effect of 10 inside and outside differential pressure of cylinder, above-mentioned hinged face 52 and open slot 41 Inner wall is close together and generates relative motion, and it is secondary to constitute friction between contact surface.

The radius in hinged face 52 is r3, and the radius of open slot 41 is r4, and inventor is had found by many experiments, for this hair The rotary compressor of bright embodiment, when (r4-r3)/r3 is too small, gap is too small between swinging block 50 and the periphery of cam part, profit Lubricating oil not easily passs through the secondary interior generation oil film of the gap engaging friction, has an adverse effect to COP；(r4-r3) it when/r3 is excessive, rubs The oil film depression of bearing force in pair is wiped, the by-produced direct contact of friction is also resulted in, has an adverse effect to COP.

Work as satisfaction：When 0.1%≤(r4-r3)/r3≤2%, such as (r4-r3)/r3=0.5, or (r4-r3)/r3= 0.5, perhaps (r4-r3)/r3=1 or (r4-r3)/r3=1.5 are easily formed oil film between the surface of friction pair, and can To maintain enough oil film thicknesses, so as to effectively reduce the contact area between swinging block 50 and slide plate 40, and then effectively drop The friction loss of low friction pair.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, is easily formed between swinging block 50 and slide plate 40 Oil film, and enough oil film thicknesses can be maintained, so as to effectively reduce the contact area between swinging block 50 and slide plate 40, into And the friction loss of friction pair is effectively reduced.

Embodiment five

Rotary compressor according to embodiments of the present invention is described below with reference to Fig. 1-Figure 35, which includes： Casing, stator 62, rotor 61, crankshaft 31, piston 32, cylinder 10, base bearing 21, supplementary bearing 22, slide plate 40 and swinging block 50.

Wherein, with reference to Fig. 1, casing may include body 71, upper housing 72, lower case 73, stator 62, rotor 61, crankshaft 31, piston 32, cylinder 10, base bearing 21, supplementary bearing 22, slide plate 40 and swinging block 50 may be mounted in casing.

As shown in Fig. 1-Figure 17, rotor 61 is connected with crankshaft 31, for driving crankshaft 31 to rotate, base bearing 21, supplementary bearing 22 are respectively provided at the upper and lower surfaces of cylinder 10, and compression chamber, piston 32 are limited between cylinder 10, base bearing 21 and supplementary bearing 22 It is set in outside the eccentric part of crankshaft 31, piston 32 is rotatably provided in cylinder 10, and piston 32 can revolve under the driving of crankshaft 31 Turn ground cooperation in compression chamber.

As shown in Figure 14, Figure 16 and Figure 17, cylinder 10 is equipped with sliding vane groove 13, and slide plate 40 is installed on sliding vane groove 13, swinging block 50 Hinged around first axle with the apex of slide plate 40, first axle is parallel with the axis of cylinder 10, and swinging block 50 compresses the outer of piston 32 Disc is slidably matched between swinging block 50 and the periphery of piston 32 in the rotary compressor course of work, forms sliding and rubs It wipes secondary.

It should be noted that the apex of slide plate 40 refers to that slide plate 40 is extend into compression chamber close to the one of the periphery of piston 32 End.One end of swinging block 50 and the apex of slide plate 40 offset, and the periphery of the other end and piston 32 of swinging block 50 offsets.Swinging block 50 has Face 55 is compressed, the periphery that face 55 compresses cam part is compressed, the width for compressing face 55 along the periphery circumferential direction of cam part is greater than The width of the apex of slide plate 40.

In the rotary compressor course of work, slide plate 40 is reciprocating along sliding vane groove 13, and swinging block 50 compresses work always The periphery of plug 32, swinging block 50 are swung around first axle relative to slide plate 40, and swinging block 50 is in the direction for being parallel to 10 end face of cylinder It swings.

It is understood that by between slide plate 40 and piston 32 be arranged swinging block 50, can substantially reduce slide plate 40 with Contact stress between piston 32, lubricating status become hydrldynamic pressure lubrication from original boundary lubrication substantially, and friction power loss obtains Cooling capacity leakage to being effectively reduced, and between slide plate 40 and piston 32 also reduces.

As shown in Figure 14-Figure 17, retaining structure is equipped between the eccentric part and piston 32 of crankshaft 31, retaining structure is for limiting Circumferentially opposed movement is generated between koji-making axis 31 and piston 32, is rubbed to avoid generating between the eccentric part of crankshaft 31 and piston 32 It wears mistake.

It is understood that the relative motion between the periphery of piston 32 and the apex of slide plate 40 will increase at this time, it is living Friction loss between the periphery of plug 32 and the apex of slide plate 40 increased, but due to using above-mentioned swinging block 50, piston Friction loss between 32 periphery and the apex of slide plate 40 has become very little, further installs detent knot on this basis Structure prevents the relative motion of the eccentric part and piston 32 of crankshaft 31, for the drop of total friction loss of the rotary compressor It is low, it is still very favorable.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, and can be effectively reduced between the eccentric part of crankshaft 31 and piston 32 and generate friction loss.

Retaining structure can be multiple structural forms.

In some embodiments, retaining structure includes the boss 35 that groove protrudes into groove, the internal perisporium and crankshaft of piston 32 One in the periphery wall of 31 eccentric part is equipped with groove, in the periphery wall of the eccentric part of the internal perisporium and crankshaft 31 of piston 32 Another is equipped with boss 35.

As shown in figure 16, the internal perisporium of piston 32 is equipped with boss 35, and the periphery wall of the eccentric part of crankshaft 31 is equipped with groove, convex Platform 35 protrudes into groove, and boss 35 and groove can be with clearance fits.

As shown in figure 17, the internal perisporium of piston 32 is equipped with groove, and the periphery wall of the eccentric part of crankshaft 31 is equipped with boss 35, convex Platform 35 protrudes into groove, and boss 35 and groove can be with clearance fits.

In further embodiments, retaining structure includes keyway 33 and key 34, and key 34 is installed on keyway 33, and keyway 33 is set In 32 internal perisporium of eccentric part periphery wall and piston of crankshaft 31.The manufacturing of keyway 33 and key 34 is more preferably.Key 34 can be length The cross section of cube, key 34 can be square, in order to install.

As shown in figure 15, at least one of the two parts part on piston 32 and crankshaft 31 of keyway 33 is blind hole, is changed Yan Zhi, at least one of the keyway 33 in keyway 33 and crankshaft 31 in piston 32 are blind hole, and the blind hole part of keyway 33 The distance of lower end to the lower end surface of piston 32 is h1, is met：h1≥1mm.In this way, the rotary compressor can be effectively prevented When operation, 34 expanded by heating of key perhaps tilts or generates friction loss with lower bearing upper end face contact under the effect of gravity.

As shown in figure 15, the upper surface of key 34 is lower than the upper surface of piston 32, and the upper surface of key 34 and piston 32 is upper The spacing of end face is h1, is met：H1 >=0.005mm, further, h1 >=0.02mm.In this way, the rotation can be effectively prevented When formula compressor is run, 34 expanded by heating of key, or inclination, cause to generate friction loss with upper bearing (metal) lower end face contact.

As shown in figure 14, the maximum distance of spindle axis of the keyway 33 apart from crankshaft 31 be L1, L1 be keyway 33 relative to The farthest point of the spindle axis of crankshaft 31 to crankshaft 31 spindle axis distance, the gas vent of base bearing 21 is at the end of cylinder 10 The minimum distance of spindle axis of the projection 11 in face apart from crankshaft 31 is L2, and L2 is the gas vent of base bearing 21 at the end of cylinder 10 The projection 11 in face relative to the spindle axis of crankshaft 31 closest approach to crankshaft 31 spindle axis distance, meet：L2-L1≥ 0.2mm。

It is understood that the sealed width of 32 end face of piston is reduced after opening up keyway 33 on piston 32, to guarantee Sealed width between 32 end face of gas vent and piston, by the way that the numberical range of L2-L1, eccentric part and work when crankshaft 31 is arranged Plug 32 using 31 spindle axis of crankshaft be rotation center rotate to the keyway 33 on piston 32 fall into exhaust bore region when, be vented Sealed width ensures to avoid influencing sealing performance in 0.2mm or more between 32 end face of hole and piston.

Keyway 33 and 34 clearance fit of key, and keyway 33 and key 34 are S1, crankshaft along the total backlash of 32 radial direction of piston Total backlash between 31 eccentric part and piston 32 is S2, meets relational expression S1 > S2.

It is understood that there are radial clearance, the rotary pressures between 31 eccentric part outer circle of crankshaft and 32 inner circle of piston When contracting machine is run, piston 32 is adjacent to 31 eccentric part of crankshaft under gas force effect, guarantee 32 outer circle of piston and 10 inner circle of cylinder it Between radial clearance.By the way that S1 > S2 is arranged, piston 32 when can prevent key 34, keyway 33 from influencing rotary compressor operation Radial clearance between 10 inner circle of outer circle and cylinder, i.e. the presence of key 34 do not interfere with compressor operation when 32 outer circle of piston and Gap between 10 inner circle of cylinder.

Embodiment six

As shown in figure 18, in the embodiment that cam mechanism 30 includes crankshaft 31 and piston 32, piston 32 is set in crankshaft Outside 31 eccentric part, the cam part of cam mechanism 30 includes piston 32, and piston 32 is rotatably provided in cylinder 10, piston 32 It is rotatably fitted in compression chamber under the driving of crankshaft 31.Certainly, cam mechanism 30 or integral type.

As shown in Figure 18 and Figure 19, cylinder 10 is equipped with sliding vane groove 13, and slide plate 40 is installed on sliding vane groove 13, swinging block 50 and cunning The apex of piece 40 is hinged around first axle, and first axle is parallel with the axis of cylinder 10, and swinging block 50 compresses the periphery of cam part, It in the rotary compressor course of work, is slidably matched between swinging block 50 and the periphery of cam part, forms sliding friction pair.

Slide plate 40 is provided with diversion trench 43 in the side parallel with the end face of cylinder 10, and diversion trench 43 is deep gouge or through slot, Diversion trench 43 extends to the apex of slide plate 40, for example the apex of slide plate 40 is equipped with the open slot 41 of arc, and swinging block 50 includes arc Hinged face 52, hinged face 52 is hinged with open slot 41, and diversion trench 43 is connected to open slot 41, in base bearing 21, supplementary bearing 22 One be equipped with oil supply gallery 23, oil supply gallery 23 and at least part period of the diversion trench 43 in 40 motion process of slide plate Perforation.

It can be understood that oil supply gallery 23 forms oil leab when being connected to diversion trench 43, lubricating oil is acted in high pressure Under, out of, oil supply gallery 23 flows into the first end side surface of slide plate 40 diversion trench 43, for the profit between 40 apex of slide plate and swinging block 50 It is sliding.The reliability of swinging block 50 and slide plate 40 is improved, while reducing friction area between slide plate 40 and bearing, reduces frictional work Consumption, effectively improves the performance of compressor.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, but also its reliability is greatly improved, and lubricating oil is introduced into slide plate 40 and swinging block 50 Between, the reliability of swinging block 50 and slide plate 40 is improved, while reducing friction area between slide plate 40 and bearing, reduces frictional work Consumption.

In some embodiments, as shown in figure 20, diversion trench 43 is projected as sector in plane where the end face of cylinder 10, Diversion trench 43 is sector, and the radian of diversion trench 43 is greater than 180 °.

In some embodiments, as shown in figure 21, diversion trench 43 plane where the end face of cylinder 10 be projected as it is oval Shape, diversion trench 43 are oblong, and diversion trench 43 includes strip section and semi-circular segments, and one end of strip section extends to 40 apex of slide plate, For example one end of strip section extends to and is connected to the open slot 41 on slide plate 40, the other end of strip section is connected with semi-circular segments.It is long Circular diversion trench 43 is easier to penetrate through with oil supply gallery 23 in 40 motion process of slide plate, and the diversion trench 43 of oblong exists in other words 40 motion process of slide plate and the time that oil supply gallery 23 penetrates through are longer.

As shown in Figure 18 and Figure 19, when the center that slide plate 40 moves to separate cylinder 10 is farthest, diversion trench 43 is apart from gas The maximum distance at the center of cylinder 10 is L3, and L3 is 43 phase of diversion trench when the center that slide plate 40 moves to separate cylinder 10 is farthest For cylinder 10 center farthest point to the center of cylinder 10 distance, and meet：L3 > D/2, D are the internal diameter of cylinder 10. In this manner it is ensured that diversion trench 43 has an opportunity to penetrate through with oil supply gallery 23 in 40 motion process of slide plate.

As shown in Figure 22 and Figure 23, center minimum range of the oil supply gallery 23 apart from cylinder 10 is L4, and L4 is oil supply gallery 23 relative to the center of cylinder 10 closest approach to the center of cylinder 10 distance, meet：D/2 < L4 < L3.In this way, can protect Card diversion trench 43 has an opportunity to penetrate through with oil supply gallery 23 in 40 motion process of slide plate.

In some embodiments, as shown in figure 22, the one end and base bearing 21 or pair of oil supply gallery 23 away from diversion trench 43 Oil sump perforation at 22 outer diameter of bearing, oil supply gallery 23 can be strip.

In further embodiments, as shown in figure 23, oil supply gallery 23 and 22 thickness direction of base bearing 21 or supplementary bearing Another side perforation, oil supply gallery 23 can be axially through base bearing 21 or supplementary bearing 22.

In a specific embodiment, oil supply gallery 23 is arranged on supplementary bearing 22, and slide plate 40 is towards supplementary bearing 22 Side is equipped with diversion trench 43.

Embodiment seven

Rotary compressor according to embodiments of the present invention is described below with reference to Fig. 1-Figure 33, which includes： Casing, stator 62, rotor 61, crankshaft 31, piston 32, cylinder 10, base bearing 21, supplementary bearing 22, slide plate 40 and swinging block 50.

As depicted in figs. 1 and 2, rotor 61 is connected with crankshaft 31, for driving crankshaft 31 to rotate, base bearing 21, supplementary bearing 22 are respectively provided at the upper and lower surfaces of cylinder 10, and compression chamber, piston 32 are limited between cylinder 10, base bearing 21 and supplementary bearing 22 It is set in outside the eccentric part of crankshaft 31, piston 32 is rotatably provided in cylinder 10, and piston 32 can revolve under the driving of crankshaft 31 Turn ground cooperation in compression chamber.

Piston 32 can be made of plastics or graphite, for example piston 32 is by polyphenylene sulfide, polymeric liquid crystal copolymer, polyethers One of ether ketone, ABS engineering plastics, Teflon are made.

Slide plate 40 can be made of one of ceramics, aluminium-silicon alloys, lightweight steel, Teflon.

Inventor is had found by many experiments, by increasing above-mentioned swinging block 50 newly, can make slide plate 40 apex and piston 32 it Between stress be reduced to several megapascal from several hundred megapascal, but also 40 side institute of the periphery of piston 32,40 apex of slide plate and slide plate The stress being subject to reduces.

Abrasion in this way between slide plate 40 and piston 32 is greatly decreased, and can reduce the power that enters of compressor, and slide plate 40 and work Wearability, rigidity and the requirement on machining accuracy decline of plug 32, to widen the selection criteria of 32 material of piston.If in correlation Under the structural condition of technology, although plastics density very little, its machining accuracy and wearability are unable to satisfy its job requirement, this Also limit the development of plastic piston 32.And the rotary compressor of the embodiment of the present invention is due to slide plate 40 and piston 32 Wearability, rigidity and requirement on machining accuracy decline, may make plastic piston 32 to free from limitation.

Its common raw material of piston 32 are nickel chromium triangle molybdenum cast iron (FC300), and density is respectively 7.3g/cm3；And plastic density is big It is generally 1~2g/cm3, the quality of piston 32 can be greatly reduced using the material.Due to 32 weight saving of piston, one side piston 32 rotational velocities will increase, and the relative velocity between piston 32 and swinging block 50 is reduced, and cause to decline into power；On the other hand, according to Equalising torque on crankshaft 31 can mitigate balance weight weight, to further reduce into power, promote compressor efficiency.

Slide plate 40 is used as moving component, and also mutually reply is reduced after lightweight, can also to decline into power.

In other words, due to the use of above-mentioned swinging block 50, contact stress between piston 32 and slide plate 40 is reduced, so that piston 32 and slide plate 40 material select more horn of plenty, can be applied to live according to the material that can not be used in previous design common sense Plug 32 and slide plate 40 can reduce the weight of piston 32 and slide plate 40 using above-mentioned material, realize light-weight design, slide plate 40 with Abrasion between piston 32 is greatly decreased, and can reduce the power that enters of rotary compressor, and the wearability of slide plate 40 and piston 32, Rigidity and requirement on machining accuracy decline, to widen the selection criteria of 32 material of piston.

Secondly, piston 32 and weight saving, 32 rotational velocity of one side piston be will increase, between piston 32 and swinging block 50 Relative velocity is reduced, and causes to decline into power；On the other hand, according to the equalising torque on crankshaft 31, balance weight also accordingly mitigates weight Amount, to further reduce into power；In addition, piston 32 and slide plate 40 are used as moving component, replacing with light material can also have Effect is reduced into power, to promote compressor efficiency.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, and has widened the selection criteria of 40 material of piston 32 and slide plate, the lightweight of rotary compressor Horizontal high, efficiency is high.

Embodiment eight

As shown in Figure 24-Figure 33, swinging block 50 includes connected the first sub- swinging block 51 and the second sub- swinging block 54, the first sub- swinging block 51 is hinged around first axle with the apex of slide plate 40, and the second sub- swinging block 54 compresses the periphery of cam part.

First sub- swinging block 51 and the second sub- swinging block 54 can be weldingly connected, such as the first sub- swinging block 51 and the second sub- swinging block 54 are weldingly connected using welding manner a kind of in Laser Welding, electric resistance welding, furnace brazing.

First sub- swinging block 51 and the second sub- swinging block 54 are that one of steel, cast iron or alloy are made, to weld.

It should be noted that the small volume of swinging block 50, there are two the mating surface for needing to process, the two match the tool of swinging block 50 Conjunction face is respectively used to form friction pair with slide plate 40 and cam part, easy to process by the way that swinging block 50 is decomposed into 2 subassemblies.

Rotary compressor according to an embodiment of the present invention significantly improves 40 apex of slide plate and connects with cam part periphery The stress of touching improves the lubricating status between slide plate 40 and cam part friction pair, greatly reduces 40 cam part of slide plate and rub The friction power loss between pair is wiped, but also its reliability is greatly improved, and the structure of the swinging block 50 is simple, convenient for adding Work, low in cost, effect is good.

As shown in Figure 10 and Figure 11, the apex of slide plate 40 is equipped with the open slot 41 of arc, and the first sub- swinging block 51 has arc Hinged face 52, hinged face 52 compresses the wall surface of open slot 41, as shown in Figure 24-Figure 33, the first sub- swinging block 51 can for circle At least part outer peripheral surface of column or the first sub- swinging block 51 be it is arc-shaped,

As shown in figure 3, there is arc to compress face 55 for the second sub- swinging block 54, and compress face 55 at least partly with cam part Periphery inscribe.As shown in Figure 24-Figure 33, the second sub- swinging block 54 compresses a part of periphery wall that face 55 is cylinder.

As shown in Figure 24-Figure 26, the first sub- swinging block 51 has the first welding surface 53, and the first welding surface 53 is arc.

As shown in Figure 27-Figure 31, the first sub- swinging block 51 has the first welding surface 53, and the first welding surface 53 is planar shaped.

As shown in Figure 32-Figure 33, the first sub- swinging block 51 has the first welding surface 53, and the first welding surface 53 is fold-line-shaped, than Such as the first welding surface 53 includes vertical between three sections, adjacent two sections be sequentially connected.

As shown in figure 24, the second sub- swinging block 54 has the second welding surface 57, and the second welding surface 57 is arc.

As shown in Figure 25-Figure 31, the second sub- swinging block 54 has the second welding surface 57, and the second welding surface 57 is planar shaped.

As shown in Figure 32-Figure 33, the second sub- swinging block 54 has the second welding surface 57, and the second welding surface 57 is fold-line-shaped, than Such as the second welding surface 57 includes vertical between three sections, adjacent two sections be sequentially connected.

Certainly, when the first welding surface 53 is identical as the shape of the second welding surface 57, the first sub- swinging block 51 and the second son are shaken The bonding area of block 54 is big, welds stronger.

The technical characteristic of above-described embodiment one to embodiment eight can be combined with each other in the case where not runing counter to be formed New embodiment.

Above-described embodiment one to embodiment eight in the case where not runing counter to, can further include following technical characteristic with Form new embodiment.

As shown in Fig. 3-Figure 13, the apex of slide plate 40 and an open slot 41 equipped with arc in swinging block 50, another Hinged face 52 including arc, hinged face 52 and open slot 41 are hinged.

In the embodiment shown in Fig. 3-Fig. 5, Fig. 8, Figure 10, Figure 11, the apex of slide plate 40 is equipped with the open slot 41 of arc, The compression chamber of open slot 41 towards cylinder 10 opens wide, and slide plate 40 is additionally provided with guide groove 42, the open end of guide groove 42 and open slot 41 It is connected, the two side walls of guide groove 42 are prolonged from the one end being connected with the side wall of open slot 41 to the other end to away from mutual direction It stretches, swinging block 50 includes the hinged face 52 of swinging block interconnecting piece 56 and arc, and swinging block 50 may include cylindrical or fan is cylindrical hinged Head, hinged face 52 are the part peripheral wall of articulated joint, and articulated joint and the open slot 41 of 40 apex of slide plate are hinged, swinging block interconnecting piece 56 Width is less than the diameter in hinged face 52.The cooperation of guide groove 42 and swinging block interconnecting piece 56 can prevent swinging block 50 swing when and cylinder 10 interference.The radian of open slot 41 is greater than 180 °, and the radian in hinged face 52 is greater than 180 °, and the radian in hinged face 52 is greater than open slot 41 radian.It in this way can anti-slip limiting plate 40 and the disengaging of swinging block 50.

In the embodiment shown in Fig. 6-Fig. 7, Fig. 9, Figure 12, Figure 13, the apex of slide plate 40 is equipped with the hinged face 52 of arc, The apex of slide plate 40 includes slide plate interconnecting piece 46 and hinged face 52, and the width of slide plate interconnecting piece 46 is less than the diameter in hinged face 52, Swinging block 50 includes the open slot 41 of arc, and slide plate 40 may include cylindrical or the cylindrical articulated joint of fan, and hinged face 52 is hinged The open slot 41 of the part peripheral wall of head, articulated joint and swinging block 50 is hinged.Slide plate interconnecting piece 46 can prevent swinging block 50 swing when with Cylinder 10 is interfered.The radian of open slot 41 is greater than 180 °, and the radian in hinged face 52 is greater than 180 °, and the radian in hinged face 52, which is greater than, to be opened The radian of mouth slot 41.It in this way can anti-slip limiting plate 40 and the disengaging of swinging block 50.

As shown in Fig. 3, Fig. 4, Fig. 6, Figure 10, Figure 12, swinging block 50, which has, compresses face 55 for compress cam part, compresses face 55 be arc, and compress face 55 at least partly with the periphery inscribe of cam part.In this way, connecing between slide plate 40 and cam part Touching becomes inscribe contact from original circumscribed contact, and friction power loss is effectively reduced, and between slide plate 40 and piston 32 Cooling capacity leakage also reduces.

As shown in Fig. 5, Fig. 7, Figure 11, Figure 13, swinging block 50, which has, compresses face 55 for compress cam part, compresses face 55 For plane.Swinging block 50 is easy to process in this way, and relative to needle roller structure in the related technology, can also reduction by a relatively large margin Contact stress.

Swinging block 50 can be made of one of steel, cast iron, plastics, alloy, ceramics material.

As shown in Fig. 2, one end that sliding vane groove 13 is connected with the compression chamber of cylinder 10 includes the notch 12 of opened type, in this way, It can interfere to avoid sliding vane groove 13 and above-mentioned swinging block 50.

The invention also discloses a kind of gas compression system, gas compression system of the invention includes any of the above-described kind of implementation The rotary compressor of example.The efficiency of gas compression system according to an embodiment of the present invention, rotary compressor is high, is not easy to grind Damage.

The invention also discloses a kind of refrigeration system, refrigeration system of the invention includes the rotation of any of the above-described kind of embodiment Formula compressor.The efficiency of refrigeration system according to an embodiment of the present invention, rotary compressor is high, not easy to wear.

The invention also discloses a kind of heat pump system, heat pump system of the invention includes the rotation of any of the above-described kind of embodiment Formula compressor.The efficiency of heat pump system according to an embodiment of the present invention, rotary compressor is high, not easy to wear.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this The range of invention is defined by the claims and their equivalents.

Claims

1. a kind of rotary compressor, which is characterized in that including：It cylinder, crankshaft, piston, base bearing, supplementary bearing, slide plate and shakes Block, the piston are set in outside the eccentric part of the crankshaft, and the piston is rotatably provided in the cylinder, the crankshaft Eccentric part and the piston between be equipped with for limiting the card for generating circumferentially opposed movement between the crankshaft and the piston Bit architecture, the cylinder are equipped with sliding vane groove, and the slide plate is installed on the sliding vane groove, the apex of the swinging block and the slide plate around First axle is hinged, and the first axle is parallel with the axis of the cylinder, and the swinging block compresses the periphery of the piston.

2. rotary compressor according to claim 1, which is characterized in that the retaining structure includes keyway and key, institute It states key and is installed on the keyway, the keyway is set to the eccentric part periphery wall and the piston internal perisporium of the crankshaft.

3. rotary compressor according to claim 2, which is characterized in that the keyway is in the piston and the crankshaft At least one of upper two parts part is blind hole, and the distance of lower end to the lower end surface of the piston is h1, is met：h1≥ 1mm。

4. rotary compressor according to claim 2, which is characterized in that the upper surface of the key is lower than the piston Upper surface, and the spacing of the upper surface of the key and the upper surface of the piston is h1, is met：h1≥0.005mm.

5. rotary compressor according to claim 2, which is characterized in that spindle shaft of the keyway apart from the crankshaft The maximum distance of the heart is L1, the spindle shaft of gas vent crankshaft described in the projector distance of the end face of the cylinder of the base bearing The minimum distance of the heart is L2, is met：L2-L1≥0.2mm.

6. rotary compressor according to claim 2, which is characterized in that the keyway and the key clearance fit, and Total backlash along the piston radial direction is S1, and the total backlash between the eccentric part of the crankshaft and the piston is S2, full Sufficient relational expression S1 > S2.

7. rotary compressor according to claim 1, which is characterized in that the retaining structure includes described in groove protrudes into One in the periphery wall of the eccentric part of the boss of groove, the internal perisporium of the piston and the crankshaft is equipped with the groove, separately One is equipped with the boss.

8. a kind of gas compression system, which is characterized in that have such as rotary compression of any of claims 1-7 Machine.

9. a kind of refrigeration system, which is characterized in that have such as rotary compressor of any of claims 1-7.

10. a kind of heat pump system, which is characterized in that have such as rotary compressor of any of claims 1-7.