CN205036580U - Multi -cylinder rotary compressor - Google Patents

Abstract

The utility model discloses a multi -cylinder rotary compressor, sealed casing have accomodate compressing mechanism portion and motor, and the motor includes stator and rotor. Compressing mechanism portion includes: the 1st cylinder and the 2nd cylinder, the median septum, piston and gleitbretter have been accomodate respectively to the 1st cylinder and the 2nd cylinder, bent axle, bent axle include the main shaft of the 1st eccentric shaft and the 2nd eccentric shaft of two pistons of separately -driven, the jackshaft of connecting the 1st eccentric shaft and the 2nd eccentric shaft, the countershaft of connecting the 1st eccentric shaft, the 2nd eccentric shaft of connection, the 1st closing plate and the 2nd closing plate in the compression chamber that possesses in sealed the 1st cylinder and the 2nd cylinder respectively, the motor bearing that possesses among the intermediate shaft bearing sliding fit who possesses in jackshaft and the median septum, main shaft and casing carries out sliding fit, the 1st eccentric shaft with the institute in the 2nd eccentric shaft at least one and the bent axle is separation combination formula. According to the utility model discloses a multi -cylinder rotary compressor has improved the reliability of high -speed operation, high load operation's bent axle.

Description

Multi-cylinder rotary compressor

Technical field

The utility model relates to compressor field, especially relates to a kind of multi-cylinder rotary compressor.

Background technique

Use in the air-conditioning of most power consumption in electrical household appliance and the rotary compressor popularized, improved APF by strong request and improve noise vibration.In addition, running up to promote air-conditioning heating ability and improve APF further and also receive publicity by the miniaturization and of rotary compressor and adjustable frequency motor.

On the other hand, maximum in rotary compressor market faults, be the wear-out failure of bent axle and bearing.Major part is because bearing load increase when high speed and high loaded process, the oil mass shortage brought that runs up cause.Therefore, the reliability being also strongly required bent axle and bearing promotes.

Model utility content

The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of multi-cylinder rotary compressor, improve the reliability of bent axle of high speed operation, high load running.

According to multi-cylinder rotary compressor of the present utility model, the housing of sealing has received compression mechanical part and motor, and described motor comprises stators and rotators; Described compression mechanical part comprises: the 1st cylinder and the 2nd cylinder; Between described 1st cylinder and described 2nd cylinder and the central diaphragm combined with them; Described 1st cylinder and described 2nd cylinder are accommodated with piston and slide plate respectively; Bent axle, described bent axle comprises and drives the 1st eccentric shaft and the 2nd eccentric shaft of two described pistons respectively, is connected the jack shaft of described 1st eccentric shaft and described 2nd eccentric shaft, is connected the countershaft of described 1st eccentric shaft, connects the main shaft of described 2nd eccentric shaft; Seal the 1st sealing plate and the 2nd sealing plate of the compression chamber possessed in described 1st cylinder and described 2nd cylinder respectively; The intermediate bearing possessed in described jack shaft and described central diaphragm is slidably matched, and the motor bearings possessed in described main shaft and described housing is slidably matched, and at least one and described bent axle in described 1st eccentric shaft and described 2nd eccentric shaft are separated and assembled.

According to multi-cylinder rotary compressor of the present utility model, be slidably matched with intermediate bearing and motor bearings respectively by making bent axle, thus act on the compressive force of two pistons and the rotary oscillation of centrifugal force and rotor carries out sliding support by above-mentioned being slidably matched, reduce the slip abrasion between eccentric shaft and bearing and vibration of compressor, improve the reliability of bent axle of high speed operation, high load running.

In embodiments more of the present utility model, in a side of at least described intermediate bearing and described motor bearings, possesses the rolling bearing carrying out with described bent axle being slidably matched.

In embodiments more of the present utility model, described bent axle at least with described 1st sealing plate and described 2nd sealing plate a side be slidably matched.

In embodiments more of the present utility model, the main shaft periphery hole of described main shaft periphery opening is communicated with the outlet pipe being connected described housing by the inside of described main shaft.

Further, described main shaft or described rotor possess oil separating device, and described oil separating device is communicated with described main shaft periphery hole.

In embodiments more of the present utility model, described intermediate bearing is by receiving the cylindrical portion of described rolling bearing and forming the both ends of the surface of the both ends open of this cylindrical portion, and the internal diameter of described both ends of the surface is less than the internal diameter of described cylindrical portion.

In embodiments more of the present utility model, described 1st cylinder is different with the discharge capacity of described 2nd cylinder, and the cylinder that discharge capacity is large is configured in described motor bearings side relative to described intermediate bearing.

In embodiments more of the present utility model, the periphery of described central diaphragm is fixed on the inwall of described housing.

In embodiments more of the present utility model, the material of described bent axle is any one in foundry goods, steel pipe, steel.

Accompanying drawing explanation

Fig. 1 is relevant to embodiment 1 of the present utility model, represent the in-built longitudinal section of multi-cylinder rotary compressor;

Fig. 2 is relevant to this embodiment 1, represents that bent axle is in detail with to the needle bearing of bent axle and the assembling method of eccentric shaft;

Fig. 3 is relevant to this embodiment 1, becomes the details drawing of the cylindrical plate of motor bearings and oil separator;

Fig. 4 is relevant to this embodiment 1, the ssembly drawing of the rolling bearing that external diameter is large and central diaphragm;

Fig. 5 is relevant to the utility model embodiment 2, represent the in-built longitudinal section of multi-cylinder rotary compressor.

Reference character:

Multi-cylinder rotary compressor 1, housing 2, end plate 2b, motor 4, stator 4a, rotor 4b,

Compression mechanical part 5, central diaphragm 50, the 1st cylinder 11, the 2nd cylinder 21, the 1st piston 61, the 2nd piston 62, the 1st sealing plate 45, the 2nd sealing plate 40, venting gas appliance 40c (45c), intermediate bearing 52, the 1st needle bearing 15, bent axle 30, main shaft periphery hole 35c, axle mesopore 35d, jack shaft 33, the 1st eccentric shaft 31, main shaft 35, the 2nd eccentric shaft 32, countershaft 36, eccentric shaft keyway 31b, key 18, axle center hole 30a, axle side switch groove 36b, axle thrust bottom 32a,

Motor shaft board 48, motor bearings 49, the 2nd needle bearing 17, end plate cylinder 2d, silencing apparatus 45b (40b), sealing plate 38, plectane 38a, slide block 38b, ball bearing 16, sliding bearing 19,

Cylindrical plate 66, periphery window 66a, outlet pipe 3, sucking pipe 28, outdoor heat exchanger 81, liquid-storage container 85, expansion valve 82, indoor heat exchanger 83, bushing nut 67.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

The multi-cylinder rotary compressor 1 according to the utility model embodiment is described in detail below with reference to Fig. 1-Fig. 5, wherein this multi-cylinder rotary compressor 1 can be hermetic rotary compressor, the opening rotary compressor of belt drives, horizontal rotary compressor or swing rotary compressor, hermetic rotary compressor can be on high-tension side rotary compressor for housing pressure, can be the rotary compressor of low voltage side for housing pressure.This multi-cylinder rotary compressor 1 can be mounted in air-conditioning, refrigeration plant, water heater, vehicle-mounted refrigeration or air-conditioning machine.

According to the multi-cylinder rotary compressor 1 of the utility model embodiment, the housing 2 of sealing has received compression mechanical part 5 and motor 4, and motor 4 comprises stator 4a and rotor 4b.Compression mechanical part 5 comprises: the 1st cylinder 11, the 2nd cylinder 21, the central diaphragm 50 combined between the 1st cylinder 11 and the 2nd cylinder 21 and with them, the 1st cylinder 11 and the 2nd cylinder 21 are accommodated with piston and slide plate, bent axle 30, the 1st sealing plate 45 sealing the compression chamber possessed in the 1st cylinder 11 and the 2nd cylinder 21 respectively and the 2nd sealing plate 40 respectively.

Bent axle 30 comprises the main shaft 35 driving the 1st eccentric shaft 31 and the 2nd eccentric shaft 32 of two pistons respectively, is connected the 1st eccentric shaft 31 and the jack shaft 33 of the 2nd eccentric shaft 32, the countershaft 36 being connected the 1st eccentric shaft 31, connection the 2nd eccentric shaft 32.

The intermediate bearing 52 possessed in jack shaft 33 and central diaphragm 50 is slidably matched, and the motor bearings 49 possessed in main shaft 35 and housing 2 is slidably matched, and at least one and bent axle 30 in the 1st eccentric shaft 31 and the 2nd eccentric shaft 32 are separated and assembled.Motor bearings 49 is positioned at the top of motor 4, and motor bearings 49 is fixed on the inwall of housing 2 by motor shaft board 48.

That is, multi-cylinder rotary compressor 1 comprises the housing 2 of sealing, motor 4 and compression mechanical part 5.

Motor 4 comprises stator 4a and rotor 4b.Compression mechanical part 5 comprises the 1st cylinder 11, the 2nd cylinder 21, central diaphragm 50, the 1st piston 61, the 2nd piston 62, the 1st slide plate, the 2nd slide plate, bent axle 30, the 1st sealing plate 45 and the 2nd sealing plate 40.

1st cylinder 11 has the 1st compression chamber, and the 2nd cylinder 21 has the 2nd compression chamber, and central diaphragm 50 to be located between the 1st cylinder 11 and the 2nd cylinder 21 and to have intermediate bearing 52.

Bent axle 30 has main shaft 35, countershaft 36, jack shaft 33, the 1st eccentric shaft 31 and the 2nd eccentric shaft 32.Wherein main shaft 35 is fixed on rotor 4b and rotates to be driven by rotor 4b.Main shaft 35 is connected with the 2nd eccentric shaft 32, and countershaft 36 is connected with the 1st eccentric shaft 31, and jack shaft 33 is between the 1st eccentric shaft 31 and the 2nd eccentric shaft 32.To be enclosed within the 1st eccentric shaft 31 to drive eccentric rotary by the 1st eccentric shaft 31 outside 1st piston 61, to be enclosed within outside the 2nd piston 62 on the 2nd eccentric shaft 32 to drive eccentric rotary by the 2nd eccentric shaft 32.

1st piston 61 is positioned at the 1st compression chamber, 2nd piston 62 is positioned at the 2nd compression chamber, and the 1st slide plate is located on the 1st cylinder 11, and the 2nd slide plate is located on the 2nd cylinder 21,1st slide plate coordinates to move back and forth with the 1st piston 61, and the 2nd slide plate coordinates to move back and forth with the 2nd piston 62.

1st sealing plate 45 is located to connect the opening surface of the 1st compression chamber on the 1st cylinder 11, and the 2nd sealing plate 40 is located on the 2nd cylinder 21 to connect the opening surface of the 2nd compression chamber.

Jack shaft 33 and intermediate bearing 52 are slidably matched, and main shaft 35 and motor bearings 49 are slidably matched.Wherein directly can be slidably matched between jack shaft 33 and intermediate bearing 52, or be provided with the bearing such as rolling bearing, sliding bearing between jack shaft 33 and intermediate bearing 52.Directly can be slidably matched between main shaft 35 and motor bearings 49, or the bearing such as rolling bearing, sliding bearing can be provided with between main shaft 35 and motor bearings 49.

According to the multi-cylinder rotary compressor 1 of the utility model embodiment, be slidably matched with intermediate bearing 52 and motor bearings 49 respectively by making bent axle 30, thus act on the compressive force of two pistons and the rotary oscillation of centrifugal force and rotor 4b carries out sliding support by above-mentioned being slidably matched, reduce the slip abrasion between eccentric shaft and bearing and vibration of compressor, improve the reliability of bent axle 30 of high speed operation, high load running.

In embodiments more of the present utility model, in a side of at least intermediate bearing 52 and motor bearings 49, possesses the rolling bearing carrying out with bent axle 30 being slidably matched.

In preferred embodiment of the present utility model, bent axle 30 is at least slidably matched with a side of the 1st sealing plate 45 and the 2nd sealing plate 40.That is, can be that one of them and the bent axle 30 in the 1st sealing plate 45 and the 2nd sealing plate 40 is slidably matched, also can be that the 1st sealing plate 45 and the 2nd sealing plate 40 are all slidably matched with bent axle 30.

In embodiments more of the present utility model, the main shaft periphery hole 35c of main shaft 35 peripheral openings is communicated with the outlet pipe 3 being connected housing 2 by the inside of main shaft 35.That is, there is in main shaft 35 axle mesopore 35d, the periphery of main shaft 35 has the main shaft periphery hole 35c be communicated with axle mesopore 35d, and the gas in housing 2 enters into axle mesopore 35d from main shaft periphery hole 35c, and the gas of discharging from axle mesopore 35d discharges housing 2 from outlet pipe 3.Because main shaft 35 is in rotation status, there is the effect of centrifugation, stop heavy oil to enter into axle mesopore 35d, play the effect of Oil-gas Separation.Thus by being provided with main shaft periphery hole 35c, that can reduce compressor tells oil mass.

Further, main shaft 35 or rotor 4b possess oil separating device, and oil separating device is communicated with main shaft periphery hole 35c.Thus the effect of Oil-gas Separation can be improved further, that reduces compressor further tells oil mass.Such as shown in figures 1 and 3, can be fixed with the cylindrical plate 66 of hollow on rotor 4b, main shaft periphery hole 35c is positioned at cylindrical plate 66, and cylindrical plate 66 is provided with periphery window 66a, and cylindrical plate 66 limits oil separating device.

In embodiments more of the present utility model, intermediate bearing 52 is by receiving the cylindrical portion of rolling bearing and forming the both ends of the surface of the both ends open of this cylindrical portion, and the internal diameter of both ends of the surface is less than the internal diameter of cylindrical portion.That is, jack shaft 33 and rolling bearing are slidably matched.

In embodiments more of the present utility model, the 1st cylinder 11 is different with the discharge capacity of the 2nd cylinder 21, and the cylinder that discharge capacity is large is configured in motor bearings 49 side relative to intermediate bearing 52.That is, the contiguous motor bearings 49 of the cylinder that discharge capacity is large is arranged, thus can reduce the bearing load of intermediate bearing 52.

In embodiments more of the present utility model, the periphery of central diaphragm 50 is fixed on the inwall of housing 2.

Alternatively, the material of bent axle 30 is any one in foundry goods, steel pipe, steel.

The multi-cylinder rotary compressor 1 according to the utility model two specific embodiments is described in detail below with reference to Fig. 1-Fig. 5.

Embodiment 1:

Multi-cylinder rotary compressor 1 shown in Fig. 1 secures the periphery of the central diaphragm 50 that the periphery of stator 4a that forms motor 4 and compression mechanical part 5 center possess at the internal diameter of housing 2.2 end plates that housing 2 is welded by cylindrical shell, its upper and lower end are formed.The lubricant oil (oil) of the bottom storage of housing 2 not diagram in addition.

The slide plate (not shown) possessed the 1st piston 61 received in the 1st cylinder 11 and the 2nd cylinder 21, these cylinders and the 2nd piston 62 in compression mechanical part 5, jointly moving back and forth with these pistons, the 1st sealing plate 45 of opening surface being connected to the compression chamber formed in above-mentioned cylinder and the 2nd sealing plate 40.In addition, venting gas appliance 40c and venting gas appliance 45c is possessed respectively in the 1st sealing plate 45 and the 2nd sealing plate 40.

Be pressed in the intermediate bearing 52 that the central diaphragm 50 be connected between the 1st cylinder 11 and the 2nd cylinder 21 and with them, its center possess and secure the 1st needle bearing 15.And, in the motor bearings 49 that is equipped with of the central authorities of fixing in the internal diameter of housing 2 motor shaft board 48 press-in secure the 2nd needle bearing 17.Therefore, feature is that bent axle 30 is slidably matched with these two needle bearings.

In embodiment 1, the 1st sealing plate 45 and have gap between the 2nd sealing plate 40 and bent axle 30, so bent axle 30 and these sealing plates are not slidably matched.Therefore, the wheel hub of each sealing plate central protrusion becomes the means in sealing silencing apparatus 45b and silencing apparatus 40b central opening portion.

Rotor 4b is secured in bent axle 30.In rotor 4b and motor bearings 49, possesses cylindrical plate 66 in the upper end of rotor 4b.And, in cylindrical plate 66, the main shaft periphery hole 35c of through bent axle 30 periphery is communicated with outlet pipe 3 by axle mesopore 35d with end plate cylinder 2d.

Connect the outlet pipe 3 of the end plate 2b of housing 2 and connect the sucking pipe 28 of central diaphragm 50, the outdoor heat exchanger 81 connecting and composing refrigeration cycle respectively and liquid-storage container 85.Therefore, the pressurized gas of discharging from outlet pipe 3 are along the sequential flowing of outdoor heat exchanger 81 and expansion valve 82, and the low-pressure gas here reduced pressure, by the sequential flowing of indoor heat exchanger 83 and liquid-storage container 85 and sucking pipe 28, is diverted in 2 cylinders.At this, the internal pressure of housing 2 is high pressure side but announcement technology of the present utility model can be applied in and the internal pressure of housing 2 is designed in the design of low voltage side.

Be discharged in silencing apparatus 45b and silencing apparatus 40b after the 1st piston 61 be inhaled into the low-pressure gas in each cylinder, being driven by bent axle 30 and the 2nd piston 62 compress.These pressurized gas, are discharged between the 2nd sealing plate 40 and motor 4.Thereafter, flow in the 35c of main shaft periphery hole through the cylindrical plate 66 of High Rotation Speed by the pressurized gas of motor 4.

In addition, the 1st needle bearing 15 is slidably matched to the load of jack shaft 33 effectively because the compression of the 1st piston 61 and the 2nd piston 62 occurs.That is, the 1st needle bearing 15 is at the center of 2 pistons and adjacent with 2 pistons, so the even power of the piston carrying out rotary compression at the phase angle of 180 degree can minimize.

2nd needle bearing 17 of one side, together with the 1st needle bearing 15, the rotary load of the support rotor 4b that is slidably matched and the inclination of bent axle 30 can be prevented.Therefore, the air gap that the whirling vibration of rotor 4b remains necessary between stator 4a and rotor 4b can be prevented.In addition, in the design that the 1st cylinder 11 is different with the discharge capacity of the 2nd cylinder 21, the cylinder that discharge capacity is large should be configured as the 2nd cylinder 21.That is, the 2nd cylinder 21 that discharge capacity is large carries out by 2 needle bearings the support that is slidably matched.

Fig. 2 represents the assembling procedure of bent axle 30 and central diaphragm 50 and the 1st eccentric shaft 31.In bent axle 30 before assembling, main shaft 35 and the 2nd eccentric shaft 32 and jack shaft 33 and countershaft 36 integrated.In the intermediate bearing 52 of central diaphragm 50, assemble the internal diameter of the 1st fixing needle bearing 15 in advance, insert from the end of countershaft 36.Thereafter, the 1st eccentric shaft 31 is inserted from the end of countershaft 36.The eccentric shaft keyway 31b of the 1st eccentric shaft 31 embeds in the key 18 be pre-installed on countershaft 36.

By above assembling, between the 1st eccentric shaft 31 and the 2nd eccentric shaft 32, receive the central diaphragm 50 fixing the 1st needle bearing 15.Its result, jack shaft 33 and the 1st needle bearing 15 are slidably matched.To countershaft 36 open-ended axle center hole 30a, be oil supply gallery to the 1st needle bearing 15 and upper note eccentric shaft, piston, slide plate etc.

Main shaft periphery hole 35c and the axle mesopore 35d of through main shaft 35 intersect vertically.Key 18 is connected with the 1st eccentric shaft 31 and axle side switch groove 36b, is the means the 1st eccentric shaft 31 being transmitted to the moment of bent axle 30.At this, the 1st eccentric shaft 31 and bent axle 30 are assembled into separated and assembled.And, the 2nd eccentric shaft 32 and bent axle 30 be that separated and assembled is also passable.At this moment, the 1st needle bearing 15 and the 2nd eccentric shaft 32 insert from the shaft end side of main shaft 35.

The material of bent axle 30 can be selected from any one of foundry goods, steel pipe, steel.Particularly, steel pipe or steel can improve the rigidity of bent axle 30, and can be improved and the effect of the wear resistance performance of bearing by Surface hardening treatment.When steel pipe or steel, if above-mentioned eccentric shaft is separated and assembled, easily form eccentric shaft.

In addition, the finishing stage aspect of compressor shown in Fig. 1, the axle thrust bottom 32a of the 2nd eccentric shaft 32 becomes the thrust surface supporting bent axle 30, coordinates with the planar slide of central diaphragm 50.Thrust gap (C) is had between axle thrust top 32b and the 2nd sealing plate 40.This thrust gap (C) is the gap that bent axle 30 can move up and down, and in addition, is end plate cylinder 2d as shown below and the gap of sealing plate 38.

Fig. 3 represents the detailed of the motor bearings 49 possessing the 2nd needle bearing 17, is pressed abd fixed on the cylindrical plate 66 possessing several periphery window 66a of rotor 4b upper end, the cross section of the end plate cylinder 2d be fixed on the end plate of housing 2 by bushing nut 67.The sealing plate 38 of the cap shape that the upper end of main shaft 35 possesses, by hiding the plectane 38a of end plate cylinder 2d opening end and forming along the slide block 38b that main shaft 35 can slide.

The effect of sealing plate 38 is described.First, when the opening end welded end plate 2b of housing 2, plectane 38a and end plate cylinder 2d will abut.Assemble in housing 2 in the final assembling procedure securing compression mechanical part 5 and end plate 2b or coating process, housing at least will have and reverses for about 1 time.

Because this reversion, sealing plate 38 slide at the external diameter of main shaft 35.Therefore, the gap equal with the thrust gap (C) of already mentioned bent axle 30 can be formed between the opening end of end plate cylinder 2d and plectane 38a.Such as, upper note thrust gap (C)=0.3mm, the opening end of end plate cylinder 2d and the gap of plectane 38a are 0.3mm, end plate cylinder 2d is by sealing plate 38, be substantially in by the state sealed.That is, sealing plate 38 prevents exhaust gas short circuit from flowing in end plate cylinder 2d, promotes the flowing to cylindrical plate 66.

The oil mass be mixed into from the pressurized gas that 2 cylinders are discharged and 2 piston rotating speeds or the proportional increase of rotor 4b.The pressurized gas comprising large gauging flow towards the periphery window 66a of cylindrical plate 66.But the cylindrical plate of High Rotation Speed 66, due to its centrifugal separating effect, stop heavy oil from the outside of periphery window 66a to inner side.On the other hand, the gas that proportion is little easily enters in cylindrical plate 66.Therefore, cylindrical plate 66 can give play to efficient oily separating effect.

By the gas that cylindrical plate 66 is separated oil, be vented from outlet pipe 3 from main shaft periphery hole 35c through axle mesopore 35d and end plate cylinder 2d.Therefore, tell while oil can significantly reduce to cooling cycle system, the oil reserve ensureing housing 2 can be stablized.

Cylindrical plate 66 design with in configuration if the oily separation means rotated together with rotor 4b, need not be limited in above-mentioned design.Such as, configure main shaft periphery hole 35c in rotor 4b, the upper-end surface of rotor 4b or lower end surface have the passage being communicated with main shaft periphery hole 35c just passable.

Or, between the 2nd sealing plate 40 and rotor 4b, configure cylindrical plate 66 and main shaft periphery hole 35c is also passable.In addition, even omit cylindrical plate 66 designs with main shaft periphery hole 35c, also can play equal above oily separating effect relative to oil effluence reducing device in the past.

The external diameter of needle bearing is little, so, be applicable to the application to central diaphragm 50 bearing.But, as shown in Figure 4, if to central diaphragm 50 split structure, even if the external diameter (Db) of ball bearing 16, large, also can reduce the internal diameter (Dm) of the opening portion 52a of intermediate bearing 52.Therefore, as the alternative of the 1st needle bearing 15, also may with ball bearing.In addition, internal diameter (Dm) is large, needs oversize piston external diameter, compression chamber internal diameter to expand, and compression efficiency declines.

As above-mentioned, possess the central diaphragm 50 of intermediate bearing 52, be the component of the compression load of support 2 pistons and the rotary load of rotor 4b.Therefore, wish that the periphery of the central diaphragm 50 of high rigid design is fixed on the inner circumferential place of housing 2.

Embodiment 2:

Embodiment 2 shown in Fig. 5, there are 2 differences relative to embodiment 1.(1) carry out in the bent axle 30 be slidably matched in compression mechanical part 5, with the 1st needle bearing 15 and the 2nd sealing plate 40 and the 1st sealing plate 45 liang being slidably matched, (2) as the alternative of the 2nd needle bearing 17, have employed sliding bearing 19.And, can bearing sleeve be adopted as sliding bearing 19.Cylindrical plate 66 fixing in the rotor 4b adopted in the embodiment 1 in addition and relevant centrifugal oil segregating units such as the main shaft periphery hole 35c of main shaft 35 opening are not illustrated.

Wear away even if produce in embodiment 2, between bent axle 30 and the one side or both of the 2nd sealing plate 40 and the 1st sealing plate 45, due to the effect of the 1st needle bearing 15, the reliability of compressor can be maintained.In addition, also passable even omit being slidably matched of less the 1st sealing plate 45 of significance and bent axle 30 in being slidably matched at above-mentioned 4.At this moment, the internal diameter of the 1st sealing plate 45 that Fig. 1 is such expands or to shorten countershaft 36 just passable.

Multi-cylinder rotary compressor of the present utility model can be mounted in air conditioner, refrigerating plant, water heater, vehicle-mounted freezing or air conditioner.Also can adopt in horizontal multi-cylinder rotary compressor in addition.

Known in sum, a particular problem to be solved in the utility model is: the multi-cylinder rotary compressor of High Rotation Speed except bent axle bearing between length long (suitable with the thickness of 2 cylinders and central diaphragm), the vibration of motor rotor running shaft is also large.Therefore, problem is slip abrasion and the vibration of compressor of bent axle and bearing.

For this reason, the concrete means solving above-mentioned problem of employing are:

The 1st needle bearing 15 and the 2nd needle bearing 17 is possessed respectively in central diaphragm 50 and motor bearings 49.1st needle bearing 15 carries out being slidably matched, being supported in 2 cylinders and carrying out rotary-piston compression load with jack shaft 33.2nd needle bearing 17 prevents the whirling vibration of rotor 4b together with the 1st needle bearing 15.From cylinder discharge pressurized gas respectively through silencing apparatus 45b and 40b, lead to from the downside of motor 4 upside.At this moment, by the sequential flowing of the main shaft periphery hole 35c from cylindrical plate 66 to bent axle 30 and axle mesopore 35d, be discharged in outlet pipe 3.

Adopt above-mentioned concrete means to be the beneficial effect that the utility model brings to be:

(1) such as 200rps etc. run up or high loaded process bent axle reliability promote.

(2) because run up, refrigerating capacity increase, so air conditioner heating capacity promote.Or reduction discharge capacity, realizes the miniaturization of compressor.In addition, from low speed to high speed wide range running can improve APF.

(3) centrifugal oil separator possessed in bent axle reduces tells oil mass, ensure that necessary oil mass in compressor inside.

(4) can apply in horizontal rotary compressor or swing rotary compressor.And housing pressure is can be suitable in the application of the multi-cylinder rotary compressor of low voltage side.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.

Claims (9)

1. a multi-cylinder rotary compressor, is characterized in that, the housing of sealing has received compression mechanical part and motor, and described motor comprises stators and rotators;

Described compression mechanical part comprises:

1st cylinder and the 2nd cylinder;

Between described 1st cylinder and described 2nd cylinder and the central diaphragm combined with them;

Described 1st cylinder and described 2nd cylinder are accommodated with piston and slide plate respectively;

Bent axle, described bent axle comprises and drives the 1st eccentric shaft and the 2nd eccentric shaft of two described pistons respectively, is connected the jack shaft of described 1st eccentric shaft and described 2nd eccentric shaft, is connected the countershaft of described 1st eccentric shaft, connects the main shaft of described 2nd eccentric shaft;

Seal the 1st sealing plate and the 2nd sealing plate of the compression chamber possessed in described 1st cylinder and described 2nd cylinder respectively;

The intermediate bearing possessed in described jack shaft and described central diaphragm is slidably matched, and the motor bearings possessed in described main shaft and described housing is slidably matched, and at least one and described bent axle in described 1st eccentric shaft and described 2nd eccentric shaft are separated and assembled.

2. multi-cylinder rotary compressor according to claim 1, is characterized in that, in a side of at least described intermediate bearing and described motor bearings, possesses the rolling bearing carrying out with described bent axle being slidably matched.

3. multi-cylinder rotary compressor according to claim 1, is characterized in that, described bent axle at least with described 1st sealing plate and described 2nd sealing plate a side be slidably matched.

4. multi-cylinder rotary compressor according to claim 1, is characterized in that, is communicated with by the inside of described main shaft the main shaft periphery hole of described main shaft periphery opening with the outlet pipe being connected described housing.

5. multi-cylinder rotary compressor according to claim 4, is characterized in that, described main shaft or described rotor possess oil separating device, and described oil separating device is communicated with described main shaft periphery hole.

6. multi-cylinder rotary compressor according to claim 2, it is characterized in that, described intermediate bearing is by receiving the cylindrical portion of described rolling bearing and forming the both ends of the surface of the both ends open of this cylindrical portion, and the internal diameter of described both ends of the surface is less than the internal diameter of described cylindrical portion.

7. multi-cylinder rotary compressor according to claim 1, is characterized in that, described 1st cylinder is different with the discharge capacity of described 2nd cylinder, and the cylinder that discharge capacity is large is configured in described motor bearings side relative to described intermediate bearing.

8. multi-cylinder rotary compressor according to claim 1, is characterized in that, the periphery of described central diaphragm is fixed on the inwall of described housing.

9. multi-cylinder rotary compressor according to claim 1, is characterized in that, the material of described bent axle is any one in foundry goods, steel pipe, steel.