CN205036584U - Multi -cylinder rotary compressor - Google Patents

Abstract

The utility model discloses a multi -cylinder rotary compressor, including seal shell, seal shell includes cylindrical shell and upper head plate, has accomodate motor and compressing mechanism portion in seal shell, and the motor possesses stator and rotor. Compressing mechanism portion includes: the 1st compression chamber and the 2nd compression chamber, the median septum that possesses intermediate shaft bearing, the 1st piston and the 2nd piston, the 1st gleitbretter and the 2nd gleitbretter, bent axle, bent axle include 1 eccentric shaft and 2 eccentric shaft, connect these eccentric shaft's jackshaft, connect 1 eccentric shaft's countershaft and connect 2 eccentric shaft and fixed the main shaft of rotor, the 1st closing plate and the 2nd closing plate, 1 eccentric shaft and 2 eccentric shaft at least one with the bent axle for separation combination formula, the end plate bearing that possesses among jackshaft and the intermediate shaft bearing sliding fit at least, main shaft and upper head plate carries out sliding fit. 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 that in electrical household appliance, power consumption is maximum and the rotary compressor popularized, need improve APF and improve noise vibration.In addition, the high speed operation that the miniaturization and of rotary compressor and variable-frequency motor bring promotes air-conditioning heating amount, it is very concerned to improve APF.In order to meet these requirements, need to be optimized the design of multi-cylinder rotary compressor.

On the other hand, the market fault that rotary compressor is more is the wear-out failure of bent axle and bearing.Wherein most of reason is the increase because of bearing load when high speed and high load running, and oil mass during high speed operation lacks.Therefore, these operating conditionss need the reliability improving bent axle and bearing.

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, comprise seal casinghousing, described seal casinghousing comprises the upper head plate of the upper end open of cylindrical shell and the described cylindrical shell of sealing, and in described seal casinghousing, received motor and compression mechanical part, described motor possesses stators and rotators; Described compression mechanical part comprises: the 1st compression chamber and the 2nd compression chamber; The central diaphragm possessing intermediate bearing is combined with these two compression chambers; The 1st piston and the 2nd piston of eccentric rotary is carried out respectively in described 1st compression chamber and described 2nd compression chamber; The 1st slide plate together moved back and forth respectively with described 1st piston and described 2nd piston and the 2nd slide plate; Bent axle, described bent axle comprise drive the 1st torque-transmitting axle of described 1st piston and described 2nd piston and the 2nd torque-transmitting axle respectively, the jack shaft that is connected these torque-transmitting axles, connect described 1st torque-transmitting axle countershaft be connected described 2nd torque-transmitting axle and secure the main shaft of described rotor; Connect the 1st sealing plate and the 2nd sealing plate of each opening surface of described 1st compression chamber and described 2nd compression chamber, at least one and described bent axle of described 1st torque-transmitting axle and described 2nd torque-transmitting axle are separated and assembled, at least described jack shaft and described intermediate bearing are slidably matched, and the end plate bearing possessed in described main shaft and described upper head plate is slidably matched.

According to multi-cylinder rotary compressor of the present utility model, due to jack shaft and intermediate bearing be slidably matched, main shaft and end plate bearing be slidably matched, therefore the compressive force of the 1st piston and the 2nd piston is acted on and the rotary oscillation of centrifugal force and rotor carries out sliding support by above-mentioned being slidably matched, reduce the slip abrasion between torque-transmitting axle 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 described intermediate bearing and described end plate bearing, at least one, possessed 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, connect the outlet pipe of described seal casinghousing to described end plate bearing openings.

Further, the inside of described main shaft and described end plate bearing are passed through to the main shaft periphery hole of the external diameter opening of described main shaft, is communicated with described outlet pipe.

Further, described main shaft or described rotor possess oil content off member, and the gas of discharging from described 1st compression chamber or described 2nd compression chamber is flow into described main shaft periphery hole by described oil content off member.

In embodiments more of the present utility model, the discharge capacity between described 1st compression chamber and described 2nd compression chamber is different, and the compression chamber that discharge capacity is large is configured in described end plate bearing side relative to described intermediate bearing.

In embodiments more of the present utility model, the aperture, two ends possessing the described intermediate bearing of described rolling bearing is less than the external diameter of described rolling bearing.

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

In embodiments more of the present utility model, the inside of described central diaphragm possesses the silencing apparatus being communicated with compression chamber.

Alternatively, the material of described bent axle be foundry goods, any one of steel pipe, steel.

Alternatively, described upper head plate and described end plate bearing are combined by laser bonding.

Accompanying drawing explanation

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

Fig. 2 is relevant to this embodiment 1, the details drawing of bent axle and the ssembly drawing of needle bearing and torque-transmitting axle;

The details drawing that Fig. 3 is relevant to this embodiment 1, possess the compression mechanical part of 2 needle bearings;

The compression mechanical part details drawing that Fig. 4 is relevant to embodiment 2 of the present utility model, possess rotary type oil content off member;

Fig. 5 is relevant to this embodiment 2, the alternate design figure of oil content off member;

Fig. 6 is relevant to embodiment 3 of the present utility model, represents the details drawing of the compression mechanical part of application ball bearing;

The details drawing that Fig. 7 is relevant to embodiment 4 of the present utility model, represent the compression mechanical part that sliding bearing is applied;

The details drawing that Fig. 8 is relevant to the present embodiment 4, represent the compression mechanical part that bearing sleeve is applied;

Fig. 9 and embodiment 5 of the present utility model about, with 3 bearings or the 4 design bearing methods ssembly drawing relevant with aligning method;

Figure 10 is relevant with this embodiment 5, to rolling bearing and sliding bearing and with the sectional view of relevant compression mechanical part;

Figure 11 is relevant to embodiment 6 of the present utility model, the sectional view of horizontal multi-cylinder rotary compressor.

Reference character:

Multi-cylinder rotary compressor 1, housing 2, cylindrical shell 2a, upper head plate 2b, lower end sheet 2c,

Motor 4, stator 4a, rotor 4b,

Compression mechanical part 5, central diaphragm 50, central diaphragm silencing apparatus 50a, the 1st cylinder 11, the 2nd cylinder 21, the 1st sealing plate 45, the 2nd sealing plate 40, the 1st needle bearing 15, end plate bearing 70, the 2nd needle bearing 17, the 1st piston 61, the 2nd piston 62, intermediate bearing 52, the 2nd slide plate 64, the 1st compression chamber 11a, the 2nd compression chamber 21a, the 1st slide plate 63,

Bent axle 30, the 1st torque-transmitting axle 31, main shaft 35, the 2nd torque-transmitting axle 32, countershaft 36, jack shaft 33, torque-transmitting axle keyway 31b,

Oil 8, main shaft periphery hole 35c, axle mesopore 35d, axle center hole 30a, axle side switch groove 36b,

Outlet pipe 3, the 1st sucking pipe 14, the 2nd sucking pipe 24, key 18, laser bonding 72, venting gas appliance 55 (40c, 45c), lining screw 67, cylindrical plate 66, outer perimeter holes 66a, the 1st ball bearing 25, the 2nd ball bearing 27, bearing sleeve 19, silencing apparatus 40b (45b), sucking pipe 28, pump chamber 71, fuel sucking pipe 72, exhaust passage 58,

Outdoor heat exchanger 81, liquid-storage container 85, expansion valve 82, indoor heat exchanger 83.

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.

Below with reference to Fig. 1-Figure 11, the multi-cylinder rotary compressor 1 according to the utility model embodiment is described in detail.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, comprise seal casinghousing 2 (following referred to as housing 2), seal casinghousing 2 comprises the upper head plate 2b of the upper end open of cylindrical shell 2a and sealing cylinder housing 2a, in seal casinghousing 2, received motor 4 and compression mechanical part 5, motor 4 possesses stator 4a and rotor 4b.

Compression mechanical part 5 comprises: the 1st compression chamber 11a and the 2nd compression chamber 21a, the central diaphragm 50 possessing intermediate bearing 52 is combined with these two compression chambers, the 1st piston 61 and the 2nd piston 62 of eccentric rotary is carried out respectively in the 1st compression chamber 11a and the 2nd compression chamber 21a, the 1st slide plate 63 together moved back and forth respectively with the 1st piston 61 and the 2nd piston 62 and the 2nd slide plate 64, bent axle 30, connect the 1st sealing plate 45 and the 2nd sealing plate 40 of each opening surface of the 1st compression chamber 11a and the 2nd compression chamber 21a.

Bent axle 30 comprise drive the 1st torque-transmitting axle 31 of the 1st piston 61 and the 2nd piston 62 and the 2nd torque-transmitting axle 32 respectively, the jack shaft 33 that is connected these torque-transmitting axles, connect the 1st torque-transmitting axle 31 countershaft 36 be connected the 2nd torque-transmitting axle 32 and secure the main shaft 35 of rotor 4b.

At least one and bent axle 30 of the 1st torque-transmitting axle 31 and the 2nd torque-transmitting axle 32 are separated and assembled, and at least jack shaft 33 and intermediate bearing 52 are slidably matched, and the end plate bearing 70 possessed in main shaft 35 and upper head plate 2b is slidably matched.

That is, multi-cylinder rotary compressor 1 comprises seal casinghousing 2, motor 4 and compression mechanical part 5.Seal casinghousing 2 comprises cylindrical shell 2a and upper head plate 2b, and upper head plate 2b is used for the upper end open of sealing cylinder housing 2a.Upper head plate 2b is provided with end plate bearing 70.

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 63, the 2nd slide plate 64, bent axle 30, the 1st sealing plate 45 and the 2nd sealing plate 40.

1st cylinder 11 has the 1st compression chamber 11a, and the 2nd cylinder 21 has the 2nd compression chamber 21a, 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 torque-transmitting axle 31 and the 2nd torque-transmitting axle 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 torque-transmitting axle 32, and countershaft 36 is connected with the 1st torque-transmitting axle 31, and jack shaft 33 is between the 1st torque-transmitting axle 31 and the 2nd torque-transmitting axle 32.To be enclosed within the 1st torque-transmitting axle 31 to drive eccentric rotary by the 1st torque-transmitting axle 31 outside 1st piston 61, to be enclosed within outside the 2nd piston 62 on the 2nd torque-transmitting axle 32 to drive eccentric rotary by the 2nd torque-transmitting axle 32.

1st piston 61 is positioned at the 1st compression chamber 11a, 2nd piston 62 is positioned at the 2nd compression chamber 21a, 1st slide plate 63 is located on the 1st cylinder 11,2nd slide plate 64 is located on the 2nd cylinder 21,1st slide plate 63 coordinates to move back and forth with the 1st piston 61, and the 2nd slide plate 64 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 11a 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 21a.

Jack shaft 33 and intermediate bearing 52 are slidably matched, and main shaft 35 and end plate bearing 70 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 end plate bearing 70, or the bearing such as rolling bearing, sliding bearing can be provided with between main shaft 35 and end plate bearing 70.

According to the multi-cylinder rotary compressor 1 of the utility model embodiment, due to jack shaft 33 and intermediate bearing 52 be slidably matched, main shaft 35 and end plate bearing 70 be slidably matched, therefore the compressive force of the 1st piston 61 and the 2nd piston 62 is acted on 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 torque-transmitting axle 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 intermediate bearing 52 and end plate bearing 70, at least one, possessed the rolling bearing carrying out with bent axle 30 being slidably matched.

In further 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.Such as at least one in the 1st sealing plate 45 and the 2nd sealing plate 40 can be arranged to sliding bearing.Thus the reliability of the bent axle 30 in high speed operation and high load running can be ensured further.

In embodiments more of the present utility model, connect outlet pipe 3 pairs of end plate bearing 70 openings of seal casinghousing 2.

Further, to inside and end plate bearing 70 that the main shaft periphery hole 35c of the external diameter opening of main shaft 35 passes through main shaft 35, outlet pipe 3 is communicated with.Thus the oil mass of discharging from outlet pipe 3 can be reduced, ensure the oil mass needed for slide member in seal casinghousing 2.

Further, main shaft 35 or rotor 4b possess oil content off member, and the gas of discharging from the 1st compression chamber 11a or the 2nd compression chamber 21a is flow into the 35c of main shaft periphery hole by oil content off member.Such as shown in Figure 4, 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 outer perimeter holes 66a, and cylindrical plate 66 limits oil content off member.

In specific embodiments more of the present utility model, the discharge capacity between the 1st compression chamber 11a and the 2nd compression chamber 21a is different, and the compression chamber that discharge capacity is large is configured in end plate bearing 70 side relative to intermediate bearing 52.That is, the contiguous end plate bearing 70 of the compression chamber that discharge capacity is large is arranged.Thus the bearing load of intermediate bearing 52 can be reduced.

In embodiments more of the present utility model, the aperture, two ends possessing the intermediate bearing 52 of rolling bearing is less than the external diameter of rolling bearing.Thus be convenient to place rolling bearing.

In examples more of the present utility model, the periphery of central diaphragm 50 is fixed on the inwall of cylindrical shell 2a.

According to preferred embodiment of the present utility model, the inside of central diaphragm 50 possesses the silencing apparatus (namely following central diaphragm silencing apparatus 50a) being communicated with compression chamber.Thus by being provided with silencing apparatus 50a, the soundproof effect of silencing apparatus 50a is good, effectively can reduce noise.

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

Alternatively, upper head plate 2b and end plate bearing 70 are combined by laser bonding.

Be described in detail according to the multi-cylinder rotary compressor 1 of the several specific embodiment of the utility model below with reference to Fig. 1-Figure 11.

Embodiment 1:

Multi-cylinder rotary compressor 1 shown in Fig. 1 secures the periphery forming the central diaphragm 50 that the periphery of stator 4a of motor 4 and the center of compression mechanical part 5 possess in the inner radius of seal casinghousing 2.Housing 2 is made up of these 3 parts of cylindrical shell 2a, the upper head plate 2b being welded thereon lower end and lower end sheet 2c.Usual cylindrical shell 2a and stator 4a is fixed as hot jacket, the spot welding being fixed as at 3 ~ 5 of central diaphragm 50 and housing 2.In addition, the bottom storage oil 8 of housing 2.

The 2nd needle bearing 17 possessed in the end plate bearing 70 that the central authorities of the 1st sealing plate 45 that compression mechanical part 5 is combined with these opening surfaces by the 1st cylinder 11 and the 2nd cylinder 21 and the 2nd sealing plate 40, the central diaphragm 50 combined between the 1st cylinder 11 and the 2nd cylinder 21 and with them, the 1st needle bearing 15 that its center possesses, upper head plate 2b are fixed by laser, in addition, the bent axle 30 etc. that carries out being slidably matched with these bearings forms.In addition, secure rotor 4b in bent axle 30, between rotor 4b and end plate bearing 70, have opening and main shaft periphery hole 35c.

Connect upper head plate 2b center and to the outlet pipe 3 of end plate bearing 70 opening, the 1st sucking pipe 14 connecting 2 compression chambers and the 2nd sucking pipe 24, the outdoor heat exchanger 81 connecting and composing refrigeration cycle respectively and liquid-storage container 85.

The pressurized gas of discharging from outlet pipe 3 flow by the order of outdoor heat exchanger 81 and expansion valve 82, press the sequential flowing of indoor heat exchanger 83 and liquid-storage container 85 and above-mentioned sucking pipe, flow to respectively in each compression chamber at the low-pressure gas of this decompression.Like this, the internal pressure of housing 2 is high pressure sides, but trunk portion of the present utility model, the internal pressure that may be used for housing 2 is the design of low voltage side.

The low-pressure gas of each compression chamber is compressed respectively in the 1st piston 61 driven by bent axle 30 and the 2nd piston 62, after being discharged to central diaphragm silencing apparatus 50a, by exhaust passage 58, is discharged between the 2nd sealing plate 40 and motor 4.By the pressurized gas of motor 4, discharge from outlet pipe 3 by the sequentially passing through of inside of main shaft periphery hole 35c, axle mesopore 35d, end plate bearing 70.

The main shaft periphery hole 35c run up together with rotor 4b, rotate by it centrifugal separating effect brought, do not allow the intrusion of the oil contained in being vented, only allow gas that proportion is less by the 35c of main shaft periphery hole.Therefore, main shaft periphery hole 35c, not still to the exhaust passage of outlet pipe 3, also can carry out the centrifugation of oil.The bottom of housing 2 got back to again by oil after separation.In addition, the outlet pipe 3 configured in the central authorities of upper head plate 2b can be used for design in the past.

Fig. 2 represents the assembling procedure of bent axle 30 and central diaphragm 50 and the 1st torque-transmitting axle 31.And, Fig. 3 represent possess the 1st needle bearing 15 compression mechanical part 5, possess the end plate bearing 70 of the 2nd needle bearing 17 and the cross section of upper head plate 2b.In addition, motor 4 is not shown.

In fig. 2, bent axle 30 is assemble the 1st torque-transmitting axle 31 in main shaft 35, the 2nd torque-transmitting axle 32 and countershaft 36, countershaft 36.The internal diameter between the 1st torque-transmitting axle 31 and the 2nd torque-transmitting axle 32 with jack shaft 33, jack shaft 33 and the 1st needle bearing 15 is slidably matched.

It is the oil supply gallery the 1st needle bearing 15, above-mentioned torque-transmitting axle and the slip surface such as piston, slide plate being carried out to fuel feeding to the open-ended axle center hole 30a of countershaft 36.In addition, in countershaft 36, possesses axle side switch groove 36b.Key 18 and the 1st torque-transmitting axle 31 and axle side switch groove 36b are combined into moment transfer means.

Next the assembling procedure, with reference to figure 3 pairs of compression mechanical parts 5 is described.First after press-in secures the external diameter of the 1st needle bearing 15 in intermediate bearing 52, central diaphragm 50 placed the 2nd cylinder 21, aligning is carried out to the internal diameter of the 1st needle bearing 15 and the 2nd compression chamber 21a, pretension is carried out to central diaphragm 50 and the 2nd cylinder 21.

Next in the 2nd cylinder 21, received the 2nd piston 62 and the 2nd slide plate 64 (Fig. 6), countershaft 36 be inserted into the inner radius of the 1st needle bearing 15.At this moment, the centre of the 2nd piston 62 embedded in the 2nd torque-transmitting axle 32.Thereafter, from main shaft 35, insert the 2nd sealing plate 40, by 4 screwings, the 2nd sealing plate 40 and the 2nd cylinder 21 be fixed in central diaphragm 50.

After above-mentioned 2nd cylinder assembling procedure completes, aligning is carried out to countershaft 36 and the 1st compression chamber 11a, the 1st cylinder 11 is pre-fixed in central diaphragm 50.At this moment, the state of fixing the 1st cylinder aligning fixture is maintained.This represents the aligning of fixing compressor structure portion 5 and bent axle 30, before final assembling procedure, maintain above-mentioned aligning.Thereafter stator 4a, the air gap aligning of rotor 4b as usual, so this omit.

After arc spot welding is carried out in the periphery of central diaphragm 50, from the upper end of main shaft 35, insert the internal diameter of the 2nd needle bearing 17 be fixed in advance in end plate bearing 70.Next, above-mentioned end plate bearing 70 is compressed and upper head plate 2b carries out periphery welding to the opening end of cylindrical shell 2a and upper head plate 2b.

Next, be welded and fixed by the 72 couples of upper head plate 2b of the laser bonding the outside from upper head plate 2b and end plate bearing 70.Laser bonding 72 carries out several spot welding as pre-welding, thereafter by circular continuous welding.That is, prevent the axle center skew of welding the end plate bearing 70 brought, guarantee weld strength.

Next, from the opening end of cylindrical shell 2a, take off above-mentioned 1st cylinder aligning fixture, in axle side switch groove 36b, assemble in key 18, key 18 the torque-transmitting axle keyway 31b inserting and possess in the 1st torque-transmitting axle 31.The assembling of countershaft 36 and the 1st torque-transmitting axle 31 can by press-in or hot jacket or gap little be slidably matched can.Thereafter packaging technology as usual, omits at this.In addition, above-mentioned alternative assembling method embodiment 5 is described.

Based on Fig. 3, the feature of embodiment 1 and effect are described.

Embodiment 1, act on the compressive force of the 1st piston 61 and the 2nd piston 62 and the rotary oscillation of centrifugal force and rotor 4b carries out sliding support by two of the 1st needle bearing 15 and the 2nd needle bearing 17.The intermediate bearing 52 supporting 2 pistons is connected with 2 pistons, so the moment that piston brings is minimum, and, be positioned at center so balance best.Simultaneously because the Leakage Gas waving generation of piston and slide plate or fault can prevent.On the other hand, end plate bearing 70 and cylindrical shell 2a carry out solder bond, are in the center of end plate 2b, so rigidity is also the highest, so be best to the vibrationproof of the bent axle 30 possessing rotor 4b.

Therefore, in such more than 150rps high speed operation, even under being difficult to guarantee the condition of oil mass, reliability also enough ensures.In addition, even also large refrigerating capacity can be played by the rotary compressor that the high speed operation from the low speed of 10rps to more than 150rps is little, so can APF be improved.That is, be also be superior owing to being out of shape the viewpoint of Leakage Gas brought from slippage loss.

In addition, between the 1st compression chamber 11a and the 2nd compression chamber 21a discharge capacity have significantly difference when, the compression chamber that discharge capacity is large is configured in end plate bearing 70 side relative to intermediate bearing 52.That is, in Fig. 3, the discharge capacity of the 1st compression chamber 11a discharge capacity that is little, the 2nd compression chamber 21a is large.Because, the 1st piston 61 possessed in 1st compression chamber is only supported by intermediate bearing 52, and in contrast to this, the 2nd piston 62 that the 2nd compression chamber 21a possesses is supported by intermediate bearing 52 and end plate bearing 70, although difference is little, the bearing load of intermediate bearing 52 has just diminished.

Next, also low noise can be maintained even be configured with in the central diaphragm silencing apparatus 50a formed in central diaphragm 50 under venting gas appliance 55 increases at a high speed the condition of noise.That is, the intensity of the wall of central diaphragm silencing apparatus 50a is large, and large by the rigidity of two cylinder clampings.Therefore, silencing apparatus is effective.In addition, the component of 2 parts that is divided into up and down of central diaphragm 50 is combined by welding or rivet.

Even the oily centrifugation of the main shaft periphery hole 35c possessed in the bent axle 30 by connection outlet pipe 3 is under harsh operating conditions, the oil mass needed for slip component of housing 2 also can be guaranteed.This effect, can be ensured further by the design techniques of embodiment 2.

In the present embodiment, bent axle 30 and the 1st torque-transmitting axle 31 are separated and assembled, but the 2nd torque-transmitting axle 32 also can be separated and assembled.These 2 torque-transmitting axles are separated and assembled, and the material selection range of bent axle 30 is just wide.The steel pipe, steel etc. that is, beyond nodular cast iron (FCD500) in the past, rigidity and cost can be utilized to have superiority.In addition, the material of the torque-transmitting axle of separated and assembled, except foundry goods, can also use sintered alloy etc.

Embodiment 2:

Rotary compressor is little relative to the internal volume of air displacement housing.Because the High Rotation Speed of rotor 4b, discharge from 2 compression chambers the cylindrical shell 2a of a large amount of Gas Stirrings oil 8, together with Exhaust Gas, be ejected into the upper space of motor by motor 4.Problem is due to high speed operation, and oil can not get back to the bottom of cylindrical shell 2a, a large amount of oil may be discharged to cooling cycle system from outlet pipe.

Embodiment 2 is improvement means of this problem, the effect of the main shaft periphery hole 35c of embodiment 1 employing can increase substantially.The periphery of the cylindrical plate 66 of in the diagram, fixing in the upper end of rotor 4b due to lining screw 67 possesses several outer perimeter holes 66a.The cylindrical plate 66 run up, due to its centrifugal separating effect, heavy oil to be difficult to from the outside of outer perimeter holes 66a by arriving inner side, the gas that only has proportion little can invade cylindrical plate 66.

Be separated oily gas, discharged from outlet pipe 3 through axle mesopore 35d and end plate bearing 70 from main shaft periphery hole 35c.Therefore, tell while oil can significantly reduce to cooling cycle system, stably can guarantee the oil reserve of housing 2.In addition, indissociable only oil, by flowing into end plate bearing 70 place, can lubricate the 2nd needle bearing 17.In addition, time the gap of the 2nd needle bearing 17 is more, the oily separating effect of cylindrical plate 66 can reduce, so the lower end of end plate bearing 70 will add only have the lid that the axle head of main shaft 35 can be through.

In the design and configuration of cylindrical plate 66, if there is the oily separation means jointly rotated with rotor 4b, to be unnecessaryly limited in above-mentioned design.Such as, as shown in Figure 5 main shaft periphery hole 35c is arranged in the groove of rotor 4b also passable.That is, rotor 4b intermediate configurations main shaft periphery hole 35c, the words that the exhausting loop being communicated with upper-end surface or lower end surface has are all right.Or, as shown in figure 11, the method between the 2nd sealing plate 40 and rotor 4b can be configured in.

Embodiment 3:

Fig. 6 is equipped with the 1st ball bearing 25 in central diaphragm 50, is equipped with the 2nd ball bearing 27, alternative as needle bearing, can uses ball bearing in end plate bearing 70.In addition, Fig. 6 represents the configuration of the 1st slide plate 63 and the 2nd slide plate 64.

Large relative to the external diameter of needle bearing, ball bearing, thickness is little.Therefore ball bearing outside dimension is difficult to the internal diameter size as intermediate bearing 52.Because the internal diameter of intermediate bearing 52 is opened very large to compression chamber center, so bearing surface of piston is defined, piston core shift amount can diminish.In order to solve this problem, Fig. 6 represents in the central diaphragm up and down 50 that can split up and down, can receive the method for the outer radius portion of the 1st ball bearing 25.

As the storage means of ball bearing outer radius portion, before the central diaphragms 50 of upper and lower 2 points are connected, the external diameter of the 1st ball bearing 25 is pressed in the segmentation central diaphragm internal diameter of a side.Thereafter, be combined with 2 chip central diaphragms, the two sides of grinding central diaphragm 50.In addition, after grinding, central diaphragm silencing apparatus 50a be cleaned.

Embodiment 4:

As shown in Figure 7, cylindrical shell 2a and compression mechanical part 5 is fixing as the 2nd cylinder 21.Therefore, the external diameter of the 2nd cylinder 21 is large, and the external diameter of central diaphragm 50 diminishes.And, do not use needle bearing or ball bearing, jack shaft 33 and main shaft 35 in intermediate bearing 52 and end plate bearing 70, be directly slidably matched with the internal diameter of intermediate bearing 52, the internal diameter of end plate bearing 70 respectively.Therefore, these are all sliding bearings.But a side of intermediate bearing 52 and end plate bearing 70 can use rolling bearing.And, rolling bearing is the general name of needle bearing and ball bearing etc.

Fig. 8 as sliding bearing, use the superior bearing sleeve 19 of wear resistance.But, also can use rolling bearing in a side of intermediate bearing 52 and end plate bearing 70.Embodiment 3 can be used in the design bearing in the little machine of refrigerating capacity or the lower machine of maximum speed.

Embodiment 5:

Embodiment 5 is the methods two sides of the 2nd sealing plate 40 and the 1st sealing plate 45 or a side used as bearing.That is, from 2 bearings that embodiment 1 to 4 adopts, add and employ the 3rd or the 4th sliding bearing.

Two sides of the 2nd sealing plate 40 and the 1st sealing plate 45 or a side there are two as the object that bearing uses: the aligning assembling that the sliding bearing that (1) adds the 3rd or the 4th improves the reliability of bearing, (2) have illustrated in embodiment 1 will simplify.

In order to the object of above-mentioned (1) words, than as shown in Figure 9, countershaft 36 and the 1st sealing plate 45 are slidably matched, in addition main shaft 35 and the 2nd sealing plate 40 are slidably matched.Further, in them, bearing length is optimized, outside 2 rolling bearings, completes the design of the sliding bearing of the 3rd and the 4th.Namely in design in the past, add the reliability of the bent axle 30 in the 1st needle bearing 15 and the 2nd needle bearing 17, guarantee high speed operation and high load running.

In addition, Fig. 9 except additional bearing, silencing apparatus 40b, silencing apparatus 45b, venting gas appliance 40c and venting gas appliance 45c can be configured respectively in the 2nd sealing plate 40 and the 1st sealing plate 45.In addition, the sucking pipe 28 be diverted in 2 compression chambers is added in central diaphragm 50.That is, in design in the past, add the design of the 1st needle bearing 15 and the 2nd needle bearing 17.

Next, in order to the object of (2), when carrying out designing, the aligning operation that embodiment 1 adopts can have the advantage of simplification.That is, assembling procedure in the past can be followed.This aligning assembling procedure is benchmark to secure the central diaphragm 50 of the 1st needle bearing 15, carry out aligning to the 2nd compression chamber 21a and the 1st compression chamber 11a.Thereafter piston and slide plate is received in pretension the 2nd cylinder 21 and the 1st cylinder 11, each compression chamber in central diaphragm 50.

Next, in the internal diameter of the 1st needle bearing 15, the 1st torque-transmitting axle 31 is assembled by the countershaft 36 of bent axle 30 is rear.Thereafter, the 1st piston 61 and the 1st slide plate 63 is received.Thereafter, secure the 2nd sealing plate 40 and the 1st sealing plate 45, compression mechanical part 5 just completes.Thereafter operation as usual, has welded the some postwelding of compression mechanical part 5 in cylindrical housings 2a, cylindrical shell 2a welds upper head plate 2b, the upper end of main shaft 35 insert end plate bearing 70 laser bonding on upper head plate 2b.

When carrying out the design of above-mentioned (2), be slidably matched with main shaft 35 and countershaft 36 respectively as shown in Figure 10, by the 2nd sealing plate 40 and the 1st sealing plate 45.But they are used only in aligning assembly, so the glade plane space of these apolegamys length L1 and L2 will reduce relatively good as far as possible.

That is, in order to only carry out sliding support with the 1st needle bearing 15 and the 2nd needle bearing 17 pairs of bent axles 30, above-mentioned 2 sliding bearing parts can carry out trace wearing and tearing when the Initial operation of compressor.Therefore, harmless to bearing part molybdenum epithelium etc. can apply.In addition, in this assembly, cylindrical shell 2a there is no need to be separated with lower end sheet 2c.

Embodiment 6:

Feature of the present utility model is configured with 2 bearings in motor 4 both sides, so also have superiority as the application of horizontal multi-cylinder rotary compressor.Figure 11 represents embodiment, has added pump chamber 71 and fuel sucking pipe 72 at the opening end of countershaft 36.

Cylindrical plate 66 is fixed on the end face of rotor 4b towards the side of the 2nd sealing plate 40.Therefore, compared with embodiment 1, the position of main shaft periphery hole 35c is different, 35d is elongated for axle mesopore.As this cases of design, main shaft periphery hole 35c and cylindrical plate 66 be fixed on rotor 4b or main shaft 35 can together with the scope that rotates, just can reach the object of carrying out oil and being separated.

Industry utilizes feasibility

Multi-cylinder rotary compressor of the present utility model, can be mounted in air-conditioning, refrigeration plant, water heater, vehicle-mounted refrigeration or air-conditioning machine.

In sum:

Problem to be solved in the utility model is:

The multi-cylinder rotary compressor of high speed operation, length between the bearing of not only eccentric shaft (with being of uniform thickness of 2 cylinders and central diaphragm) is long, and the vibration of rotor running shaft is large.Therefore, the slip abrasion of torque-transmitting axle and bearing and vibration of compressor can become problem.

Solve concrete means of above-mentioned problem:

Central diaphragm 50 and end plate bearing 70 possess the 1st needle bearing 15 and the 2nd needle bearing 17 respectively.1st needle bearing 15 is slidably matched with jack shaft 33, supports the compression load carrying out the piston rotated between 2 cylinders.2nd needle bearing 17, prevent the vibration of rotor 4b together with the 1st needle bearing 15.Discharge pressurized gas from 2 cylinders and pass through exhaust passage 58 from central diaphragm silencing apparatus 50a, be discharged to outlet pipe 3 through end plate bearing 70 from main shaft periphery hole 35c.

Above-mentioned means are adopted to be the beneficial effect that the utility model brings:

(1) utilize the feature of the Combination application to intermediate bearing and end plate bearing, rolling bearing, high speed operation, the bent axle reliability of high load running, the operation by wide range from low speed to high speed can be promoted, improve APF.(2) exhaust passage by being equipped with in bent axle, can guarantee oil mass during High Rotation Speed in addition.Still can not apply in hermetic rotary compressor, in the opening rotary compressor of belt drives, in addition horizontal rotary compressor and swing rotary compressor in addition.In addition, housing pressure is also can apply in the 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 (12)

1. a multi-cylinder rotary compressor, it is characterized in that, comprise seal casinghousing, described seal casinghousing comprises the upper head plate of the upper end open of cylindrical shell and the described cylindrical shell of sealing, in described seal casinghousing, received motor and compression mechanical part, described motor possesses stators and rotators;

Described compression mechanical part comprises:

1st compression chamber and the 2nd compression chamber;

The central diaphragm possessing intermediate bearing is combined with these two compression chambers;

The 1st piston and the 2nd piston of eccentric rotary is carried out respectively in described 1st compression chamber and described 2nd compression chamber;

The 1st slide plate together moved back and forth respectively with described 1st piston and described 2nd piston and the 2nd slide plate;

Bent axle, described bent axle comprise drive the 1st torque-transmitting axle of described 1st piston and described 2nd piston and the 2nd torque-transmitting axle respectively, the jack shaft that is connected these torque-transmitting axles, connect described 1st torque-transmitting axle countershaft be connected described 2nd torque-transmitting axle and secure the main shaft of described rotor;

Connect the 1st sealing plate and the 2nd sealing plate of each opening surface of described 1st compression chamber and described 2nd compression chamber,

At least one and described bent axle of described 1st torque-transmitting axle and described 2nd torque-transmitting axle are separated and assembled,

At least described jack shaft and described intermediate bearing are slidably matched, and the end plate bearing possessed in described main shaft and described upper head plate is slidably matched.

2. multi-cylinder rotary compressor according to claim 1, is characterized in that, in described intermediate bearing and described end plate bearing, at least one, possessed 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, connects the outlet pipe of described seal casinghousing to described end plate bearing openings.

5. multi-cylinder rotary compressor according to claim 4, is characterized in that, passes through the inside of described main shaft and described end plate bearing, be communicated with described outlet pipe to the main shaft periphery hole of the external diameter opening of described main shaft.

6. multi-cylinder rotary compressor according to claim 5, it is characterized in that, described main shaft or described rotor possess oil content off member, and the gas of discharging from described 1st compression chamber or described 2nd compression chamber is flow into described main shaft periphery hole by described oil content off member.

7. multi-cylinder rotary compressor according to claim 1, is characterized in that, the discharge capacity between described 1st compression chamber and described 2nd compression chamber is different, and the compression chamber that discharge capacity is large is configured in described end plate bearing side relative to described intermediate bearing.

8. multi-cylinder rotary compressor according to claim 2, is characterized in that, the aperture, two ends possessing the described intermediate bearing of described rolling bearing is less than the external diameter of described rolling bearing.

9. 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 cylindrical shell.

10. multi-cylinder rotary compressor according to claim 1, is characterized in that, the inside of described central diaphragm possesses the silencing apparatus being communicated with compression chamber.

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

12. multi-cylinder rotary compressors according to claim 1, is characterized in that, described upper head plate and described end plate bearing are combined by laser bonding.