CN205089618U - Multi -cylinder rotary compressor - Google Patents

Abstract

The utility model discloses a multi -cylinder rotary compressor, including compressing mechanism portion, compressing mechanism portion includes: at least one first cylinder, every first cylinder include that two of integrated into one piece compress chamber and median septum, and the median septum lies in between two compression chambeies, and every median septum has the mesophragma diaphragm orifice. Bent axle, bent axle include main shaft, countershaft, two at least eccentric shafts and center pin, and main shaft and main bearing fit, countershaft and vice bearing fit, every piston overcoat are connected with the jackshaft between every two adjacent eccentric shafts on an eccentric shaft, and the jackshaft runs through the mesophragma diaphragm orifice. At least 1 is separation combination formula with the bent axle in two eccentric shafts that every first cylinder corresponds. According to the utility model discloses a multi -cylinder rotary compressor can reduce assembly error, improves the rigidity, and the internal diameter of mesophragma diaphragm orifice can enlarge for the external diameter eccentric volume enough little, the bent axle of eccentric shaft.

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

Multi-cylinder rotary compressor, compared with single cylinder rotary compressor, can operate in the operating range of 120rps at the low speed of 15rps usually, and running vibration has superiority.In recent years, in order to tackle large-scale plant, the application of the 10HP level of variable-frequency motor is used to get along with.

On the other hand, multi-cylinder rotary compressor adds due to cylinder, and between centers is long becomes large, so drive the vibration of the bent axle of several piston to increase, brings the problem of wear-out failure.In addition, the center hole of the central diaphragm possessed between cylinder can by eccentric shaft at assembling procedure, so center hole becomes large, crankshaft eccentric amount limits less.

As the improvement means of crankshaft vibration, have in correlation technique and medium axle diameter part is strengthened, improve bent axle rigidity.Also adopt the means reducing central diaphragm center hole in correlation technique, central diaphragm is divided into 2 parts and again assembles.

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, the internal diameter in central diaphragm hole core shift amount that is enough little relative to the external diameter of eccentric shaft, bent axle can expand.

According to multi-cylinder rotary compressor of the present utility model, comprise compression mechanical part, described compression mechanical part comprises: at least one first cylinder, each described first cylinder comprises integrated two compression chambers and central diaphragm, described central diaphragm is between described two compression chambers, be accommodated with piston in each described compression chamber, each described piston correspondence is provided with slide plate, and each described central diaphragm has central diaphragm hole; Be positioned at main bearing and the supplementary bearing of at least one the first cylinder both sides described; Bent axle, described bent axle comprises main shaft, countershaft, at least two eccentric shafts and central shaft, described main shaft coordinates with described main bearing, described countershaft coordinates with supplementary bearing, each described piston jacket is on a described eccentric shaft, be connected with described jack shaft between two often adjacent described eccentric shafts, described jack shaft runs through described central diaphragm hole; In two described eccentric shafts that each described first cylinder is corresponding, at least 1 is separated and assembled with described bent axle.

According to multi-cylinder rotary compressor of the present utility model, by being provided with integrated first cylinder, therefore can reduce assembly error, improving rigidity.Simultaneously because at least one eccentric shaft corresponding to each first cylinder and bent axle are separated type, therefore can the internal diameter core shift amount that is enough little relative to the external diameter of eccentric shaft, bent axle in central diaphragm hole can expand.

In embodiments more of the present utility model, multi-cylinder rotary compressor also comprises at least one group of the second cylinder and intermediate plate, described second cylinder has single compression chamber, described intermediate plate is between adjacent two compression chambers, when described compression chamber is more than three, at least two eccentric shafts and described bent axle are separated and assembled.

In embodiments more of the present utility model, between described countershaft and described supplementary bearing, between described jack shaft and described central diaphragm hole, at least one is for being slidably matched.

In embodiments more of the present utility model, the described eccentric shaft of separated and assembled and the combination of described bent axle, can by modes such as embedding, press-in, hot jacket, laser bonding.

Further, moment transferring member is possessed between described eccentric shaft and described bent axle.

In embodiments more of the present utility model, the external diameter of described countershaft is less relative to the external diameter of described main shaft.

In embodiments more of the present utility model, the material of described first cylinder is any one in sintered alloy, aluminum alloy, foundry goods.

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

In embodiments more of the present utility model, the material of described eccentric shaft is any one in foundry goods, sintered alloy, carbon steel.

In embodiments more of the present utility model, the silencing apparatus that the pressurized gas of discharging in compression chamber described in any one are provided with by described intermediate plate inside.

In embodiments more of the present utility model, described central diaphragm has the circular groove of at least one opening to described central diaphragm.

In embodiments more of the present utility model, in described central diaphragm hole, possesses any one in lining, rolling bearing, nail bearing.

In embodiments more of the present utility model, arbitrary end face of described central diaphragm is formed as the thrust slip surface supporting described eccentric shaft load.

In embodiments more of the present utility model, between the spindle end bearing of the end of main shaft described in sliding support and described main bearing, possesses the motor driving described main shaft.

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 cross-sectional view of compression mechanical part;

Fig. 3 is relevant to this embodiment 1, the longitudinal section of compression mechanical part;

Fig. 4 is relevant to this embodiment 1, central diaphragm ssembly drawing;

Fig. 5 is relevant to this embodiment 1, the External view of bent axle;

Fig. 6 is relevant to this embodiment 1, the details drawing of separated and assembled eccentric shaft and key;

The longitudinal section that Fig. 7 is relevant to the utility model embodiment 2, represent compression mechanical part;

Fig. 8 is relevant to this embodiment 2, the longitudinal section of compression mechanical part;

Fig. 9 is relevant to the utility model embodiment 3, the longitudinal section of compression mechanical part;

Figure 10 is relevant to the utility model embodiment 4, the longitudinal section of compression mechanical part;

Figure 11 is relevant to the utility model embodiment 5, the longitudinal section of compression mechanical part;

Figure 12 is relevant to the utility model embodiment 6, the longitudinal section of multi-cylinder rotary compressor;

Figure 13 is relevant to embodiment 7 of the present utility model, the sectional view of cylinder;

Figure 14 is relevant to this embodiment 7, the sectional view of cylinder;

Figure 15 is relevant to this embodiment 7, the sectional view of cylinder.

Reference character:

Multi-cylinder rotary compressor 1, housing 2,

Motor 4, stator 4a, rotor 4b,

Compression mechanical part 52, first cylinder 10, main bearing 50, supplementary bearing 55, the 1st silencing apparatus 51b, the 2nd silencing apparatus 55b, the 1st compression chamber 11, the 2nd compression chamber 12, central diaphragm 60, central diaphragm hole 60a, the 1st suction port 21, the 2nd suction port 22, screw hole 28, screw 58, intermediate plate 62, intermediate plate silencing apparatus 62a, the second cylinder 130, the 3rd eccentric shaft 43, circular groove 65,

Bent axle 30, the 1st eccentric shaft 35, the 2nd eccentric shaft 40, piston 71b (71a), slide plate 72b (72a), core shift amount e, countershaft 33, key 45, main shaft 31, jack shaft 32, the 1st eccentric shaft fixing part 35c, keyway 46, oil groove 37b (38b), oilhole 37a (38a), eccentric shaft keyway 47, thrust 36a, auxiliary axis 31a

Outlet pipe 3, the 1st sucking pipe 26, the 2nd sucking pipe 27, intermediate bearing 60b, fuel supply line 74,

Liquid-storage container 80, spindle end bearing 75, lining 66, rolling bearing 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-Figure 15.

According to the multi-cylinder rotary compressor 1 of the utility model embodiment, comprise compression mechanical part, compression mechanical part comprises: at least one first cylinder 10, the main bearing 50 being positioned at least one the first cylinder 10 both sides and supplementary bearing 55, bent axle 30.

Each first cylinder 10 has integrated two compression chambers and central diaphragm, and central diaphragm, between two compression chambers, is accommodated with piston in each compression chamber, and each piston correspondence is provided with slide plate, and each central diaphragm has central diaphragm hole.That is, compression mechanical part can comprise one or more first cylinder, and each first cylinder 10 comprises integrated two compression chambers and central diaphragm.In example such as shown in Fig. 3, Fig. 7 and Fig. 8, compression mechanical part comprises first cylinder 10.In example as shown in Figure 9, compression mechanical part comprises the second cylinder 130 and the intermediate plate 62 (being the single central diaphragm 62 shown in following embodiment 3) that 10, one, first cylinder has independent compression chamber.In the example depicted in fig. 10, compression mechanical part comprises between two the first cylinders, 10, two the first cylinders 10 and is provided with an intermediate plate 62.

In brief, compression chamber can be two or more.When compression chamber is more than three and three, can be provided with first cylinder 10, and at least add one group of single compression chamber and single intermediate plate, this intermediate plate is with intermediate panel aperture.

Bent axle 30 comprises main shaft 31, countershaft 33, at least two eccentric shafts and central shafts, main shaft 31 coordinates with main bearing 50, and countershaft 33 coordinates with supplementary bearing 55, and each piston jacket is on an eccentric shaft, be connected with jack shaft 32 between two often adjacent eccentric shafts, jack shaft 32 runs through central diaphragm hole.Preferably, main shaft 31 and main bearing 50 are slidably matched, and countershaft 33 and supplementary bearing 55 are slidably matched, and jack shaft 32 and central diaphragm hole are slidably matched.

In two eccentric shafts of each first cylinder 10 correspondence, at least 1 is separated and assembled with bent axle 30.

According to the multi-cylinder rotary compressor 1 of the utility model embodiment, by being provided with integrated first cylinder 10, therefore can reduce assembly error, improving rigidity.Simultaneously because at least one eccentric shaft corresponding to each first cylinder and bent axle 30 are separated type, therefore can the internal diameter core shift amount that is enough little relative to the external diameter of eccentric shaft, bent axle 30 in central diaphragm hole can expand.

In embodiments more of the present utility model, multi-cylinder rotary compressor 1 also comprises at least one group of the second cylinder 130 and intermediate plate 62, second cylinder has single compression chamber, intermediate plate 62 is between adjacent two compression chambers, intermediate plate has intermediate panel aperture, and multi-cylinder rotary compressor 1 can comprise the compression chamber of more than three and three thus.Be understandable that, be also provided with the eccentric shaft that overcoat has piston in the compression chamber of the second cylinder, when compression chamber is more than three, at least two in multiple eccentric shafts that multi-cylinder rotary compressor 1 has is separated and assembled with bent axle.When compression chamber is three, can be two or three in three eccentric shafts be separated and assembled with bent axle.

Further, the silencing apparatus that the pressurized gas of discharging in any one compression chamber are provided with by intermediate plate 62 inside of independent machine shaping.In concrete example of the present utility model, between countershaft 33 and supplementary bearing 55, between jack shaft 32 and central diaphragm hole, at least one is for being slidably matched.That is, can be that countershaft 33 is slidably matched with supplementary bearing 55, jack shaft 32 is not slidably matched with central diaphragm hole; Or countershaft 33 with supplementary bearing 55 be not be slidably matched, jack shaft 32 with central diaphragm hole for being slidably matched; Or countershaft 33 is slidably matched with supplementary bearing 55, jack shaft 32 is slidably matched with central diaphragm hole.

Particularly, the eccentric shaft of separated and assembled and the combination of bent axle 30, can by modes such as embedding, press-in, hot jacket, laser bonding.Further, possess moment transferring member between eccentric shaft and bent axle 30, wherein moment transferring member can be key.

In specific embodiments more of the present utility model, the external diameter of countershaft 33 is less relative to the external diameter of main shaft 31.

Alternatively, the material of the first cylinder 10 is any one in sintered alloy, aluminum alloy, foundry goods.

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

Alternatively, the material of eccentric shaft is any one in foundry goods, sintered alloy, carbon steel.

In embodiments more of the present utility model, as shown in figure 13, central diaphragm has the circular groove 65 at least one opening of central diaphragm.

In embodiments more of the present utility model, in central diaphragm hole, possesses any one in lining 66, rolling bearing 67, nail bearing.

According to embodiments more of the present utility model, arbitrary end face of central diaphragm is formed as the thrust slip surface supporting eccentric shaft load.

In further embodiment of the present utility model, as shown in figure 12, multi-cylinder rotary compressor 1 also comprises the spindle end bearing 75 of the end for sliding support main shaft 31.Further, between the spindle end bearing 75 of the end of sliding support main shaft 31 and main bearing 50, possesses the motor 4 of drive main spindle 31.

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 15.

Embodiment 1:

Multi-cylinder rotary compressor 1 shown in Fig. 1 the inner radius of columniform housing 2 secure form motor 4 the periphery of stator 4a, rotary compressor compression mechanical part 52 in the periphery of cylinder 10 that possesses.Compression mechanical part 52 is made up of 2 compression chambers and the first cylinder 10 of central diaphragm integration, the main bearing 50 be combined with these compression chambers and supplementary bearing 55, the bent axle 30 etc. that carries out sliding with these bearings.Rotor 4b is secured in bent axle 30.

The 1st sucking pipe 26 that outlet pipe 3, first cylinder 10 periphery that housing 2 upper end connects connects, the 2nd sucking pipe 27 are connected to liquid-storage container 80.Outlet pipe 3 and liquid-storage container 80 are connected high pressure side and the low voltage side of refrigerating circulatory device respectively.The 1st silencing apparatus 51b and the 2nd silencing apparatus 55b is possessed respectively in main bearing 50 and supplementary bearing 55.

The internal pressure of housing 2 is high pressure side, it is appreciated of course that the internal pressure of the utility model middle shell 2 also can be low voltage side.In addition, bent axle 30 is that the horizontal of substantially horizontal is also set up.Do not have the open compressor of motor 4 passable in addition yet.

Fig. 2 is the X-X cross section of Fig. 1.In the 2nd compression chamber 12 possessed in first cylinder 10, possess: the piston 71b carrying out off-centre operation by the 2nd eccentric shaft 40, the slide plate 72b moved back and forth by the off-centre operation of this piston.Core shift amount e is the length at the axle core of bent axle 30 and the center of the 2nd eccentric shaft 40, is also bent axle core shift amount.The range amount (S) of slide plate 72b is 2 times of core shift amount e.The utility model can reduce aftermentioned central diaphragm hole 60a so can expand core shift amount e.Therefore, due to the increase of slide plate range amount (S), the size that need not change compression chamber just can expand discharge capacity.

Fig. 3 be Fig. 2 Y-Y sectional view, be the longitudinal section of compression mechanical part 52, the 1st compression chamber 11 and the 2nd compression chamber 12 and central diaphragm 60 integration cylinder in, the bent axle 30 etc. representing the main bearing 50 that connects two compression chamber opening ends respectively and supplementary bearing 55, be slidably matched with them.

Bent axle 30 and the 1st eccentric shaft 35 are separated and assembled, and the 1st eccentric shaft 35 is connected with key 45 by countershaft 33.On the other hand, bent axle 30 and the 2nd eccentric shaft 40 carry out integration as usual.And after Fig. 3, the silencing apparatus of 2 shown in Fig. 1, the venting gas appliance possessed in the main bearing 50 and supplementary bearing 55 of these silencing apparatus inside are not shown.

Fig. 4, Fig. 5 and Fig. 6 represent the cross section of the first cylinder 10, bent axle 30 respectively and form component, be separated with bent axle 30 the 1st eccentric shaft 35 of combination in detail and moment transmit the component figure of key 45.

In Fig. 4, possess columniform 1st compression chamber 11 and the 2nd compression chamber 12 in the first cylinder 10, in their central diaphragm 60 (width h) of centre differentiation, possessed central diaphragm hole 60a (internal diameter d3).In addition, possess the through screw hole 28 of the 1st suction port 21 of each compression chamber opening and the 2nd suction port 22, both ends of the surface.Consider, for being formed by 3 components altogether of 2 cylinders and 1 central diaphragm in the first cylinder 10 of multi-cylinder rotary compressor, in the past design, to concentrate on now in 1 component, have superiority so precision and rigidity compare.

1st compression chamber 11 of the first cylinder 10 is similar with the 2nd compression chamber 12, d1=d2, H1=H2.These 2 sizes will change according to necessity.In addition, the central diaphragm hole 60a in embodiment 1 is not that circle is also passable.In addition, the forged material, aluminum alloy etc. that form as the material of cylinder the 1, the sintered alloy had superiority in foundry goods, formability, carbon steel etc. also can use.

In Fig. 5, bent axle 30 forms by the order of main shaft 31, the 2nd eccentric shaft 40, jack shaft 32, the 1st eccentric shaft fixing part 35c, countershaft 33 from upper.The keyway 46 of axle side is possessed in 1st eccentric shaft stationary axle 35c.As a reference, the outside dimension that dotted line represents point other axial length, Dc1, De2, Dc2, Dc3 represent note axle.In addition, Fig. 5, relative to bent axle 30 90-degree rotation of Fig. 3, represents the keyway 46 of axle side.

In this design, Dc1 > Dc2=Dc3, De1 (external diameter of the 1st eccentric shaft 35)=De2 (external diameter of the 2nd eccentric shaft 40).In addition, in the internal diameter d3 of the central diaphragm hole 60a shown in Fig. 4, in De2 or De1 > d3 > Dc2, embodiment 1, the internal diameter d3 of central diaphragm hole 60a is less than the external diameter of eccentric shaft, larger than jack shaft 32, to compare with multi-cylinder rotary compressor (De2 or De1 < d3) in the past and have larger difference.The magnitude relationship of the shaft size of the bent axle 30 of pie graph 5, and internal diameter d3 is not fixing, as aftermentioned, can change as required.

In 1st eccentric shaft 35 of Fig. 6, its internal diameter 35a (de1) is slidably matched with the outer diameter D c3 of the 1st eccentric shaft fixing part 35c, and gap is little.And, possess the oilhole 37a to oil groove 37b perforate from internal diameter 35a.Therefore, oil groove 37b is communicated with the axle center hole possessing the bent axle 30 of oil feed pump.To the upper and lower perforate of internal diameter 35a of eccentric shaft keyway 47.

But such as, in the design of the downside of eccentric shaft keyway 47 not opening, the 1st eccentric shaft 35 can support the load of bent axle 30 by key 45.At this moment, the thrust 36a (Fig. 3) of the 1st eccentric shaft 35 lower end surface becomes thrust.

The assembling method of bent axle 30 and the 1st eccentric shaft 35, in the central diaphragm hole 60a of the first cylinder 10, insert the countershaft 33 of bent axle 30 after, in the keyway 46 of countershaft 33, embedded in key 45.Key 45 is consistent with the eccentric shaft keyway 47 of the 1st eccentric shaft 35, embedded in the internal diameter 35a of the 1st eccentric shaft 35 in the external diameter of countershaft 33.At this, countershaft 33 and eccentric shaft internal diameter 35a be slidably matched, so they can pre-fix by simple method.

Thereafter, receive piston 71b and slide plate 72b (Fig. 7 diagram) in the 2nd compression chamber 12, in the internal diameter of main bearing 50, have passed main shaft 31.After main shaft 31 and the 2nd compression chamber 12 aligning or pretension, piston 71a and slide plate 72a (Fig. 7 diagram) has been received in the 1st compression chamber 11, after supplementary bearing 55 aligning, main bearing 50 and supplementary bearing 55 are fixed on after on cylinder 10 by screw 58, compression mechanical part 52 just completes.

The connection of the 1st eccentric shaft stationary axle 35c and the 1st eccentric shaft 35 internal diameter 35a, has being slidably matched of little gap, also can select to be pressed into gently or hot jacket except above resembling.In addition, the combination of key and keyway is the means flywheel moment of bent axle 30 be delivered on the 1st eccentric shaft 35, uses the method for CO2 atmosphere or YAG atmosphere laser bonding, can omit key and keyway.

Just like this, by carrying out separation combination to a side of at least 2 eccentric shafts, the external diameter of central diaphragm hole 60a and jack shaft 32 or countershaft 33 is similar to.As a result, bent axle core shift amount can be expanded, expand slide plate path increment (S).That is, the internal diameter of compression chamber need not expand, and just can easily improve compression efficiency and refrigerating capacity.And central diaphragm hole 60a reduces the rigidity that not only can improve central diaphragm 60, in design, the thrust function of impossible bent axle 30 also can be altered to the plane of central diaphragm 60 in the past.

Embodiment 2:

Fig. 7 is the intermediate bearing 60b slided to central diaphragm hole 60a and the jack shaft 32 of embodiment 1.At this, the central diaphragm hole 60a under the state be slidably matched with jack shaft 32 is called intermediate bearing 60b.Its result, 3 bearings that bent axle 30 and main bearing 50, intermediate bearing 60b and supplementary bearing 55 form are slidably matched.

Intermediate bearing 60b is the repeated load that the 3rd bearing, the compressive force of being carried out piston 71b and the piston 71a rotated by the phase angles of 180 degree and centrifugal force are produced, and is supported by intermediate bearing 60b and main bearing 50, intermediate bearing 60b and supplementary bearing 55.

Embodiment 2 is pressed can significantly be reduced by the intermediate bearing 60b that adds sliding support jack shaft 32, the face can reduced and each bearing produces of beating of slip component of linking with bent axle 30.In addition, this design can in the same manner as in Example 1, and the 1st eccentric shaft 35 is separated and assembled, the 2nd eccentric shaft 40 is one with bent axle 30.In addition, bent axle 30 has followed the design shown in Fig. 5.

From the axle core of bent axle 30, through being injected into the lubricant oil in oil groove 38b to the oilhole 38a of jack shaft 32 perforate, the slip surface of jack shaft 32 and intermediate bearing 60b is lubricated.Oil groove 38b also can be configured in the inner radius of intermediate bearing 60b.In addition, slide plate 72a and slide plate 72b moves back and forth with the revolution interlock of piston 71a and piston 71b respectively, the utility model integrated with piston and slide plate swing in also can use.

The design of the bearing performance of intermediate bearing 60b is improved when Fig. 8 is external diameter (Dc2) of external diameter (the Dc1)=eccentric shaft 32 of main shaft 31.And, Dc1 < Dc2, that is, the footpath of jack shaft 32 can be allowed larger than main shaft 31, make the bearing performance of intermediate bearing 60b maximum.That is, according to the compression load of piston, the external diameter of jack shaft 32 and the axial length (h in Fig. 4) of intermediate bearing 60b are optimized.

Embodiment 3:

The design of Fig. 9 is: in the middle of the duplex cylinder compressor structure portion 52 of Fig. 7, adds and possesses the single intermediate plate 62 of intermediate plate silencing apparatus 62a and possess the design of the second cylinder 130 as 3 cylinder compressor structure portions 53 of compression chamber 13.In this design, 2 jack shafts and central diaphragm, intermediate plate can be slidably matched, so become 4 bearings.The footpath of countershaft 33, jack shaft 32a and jack shaft 32b is suitable, and the 1st eccentric shaft 35 and the 3rd eccentric shaft 43 are separated and assembled.

Single second cylinder 130 and the intermediate plate 62 that add, to be combined by screw in the first cylinder 10 of high rigidity, so the reliability in 3 cylinder compressor structure portions 53 and performance reduce, maintain the quality of height.In addition, the central silencer 62a possessed in intermediate plate 62 becomes the 2nd compression chamber 12 exhaust silencer out, central silencer 62a can add outfit venting gas appliance.In addition, the 1st eccentric shaft 35 and the 2nd eccentric shaft 40 also passable as separated and assembled.In addition, being slidably matched of an arbitrary jack shaft and central diaphragm is omitted also passable as 3 spot bearings.

Embodiment 4:

In Figure 10, add in 4 cylinder compressor structure portions 54 of 2 the first cylinder 10a, the first cylinder 10b and intermediate plate 62 composition, the periphery of the first cylinder 10b has been fixed on the inner circumferential of housing 2.Therefore, a part for the periphery of the first cylinder 10a can eliminate.

Bent axle 30 and all eccentric shafts of steel pipe are all separated and assembled.Therefore, the external diameter of main shaft 31 and 3 jack shafts and countershaft 33 is suitable.In order to reduce the slippage loss of bent axle 30, suitably can expand the internal diameter of intermediate plate 62, omit being slidably matched of jack shaft 32b and intermediate plate 62.In addition, as the material of bent axle 30, wear resistance reasonable SCM system steel pipe can be selected.

4 eccentric shafts do not use the external diameter of the internal diameter of key 45, eccentric shaft and bent axle 30 can adopt the mode of laser bonding.At this moment, each suction port can use laser optical path.And, as the sintered alloy of the material of eccentric shaft or forged material, with the weld strength and manufacturing of bent axle 30 in have superiority.

The arrangement angles of eccentric shaft is changed according to number of cylinders.Usually, 360 degree divided by number of cylinders, decile is carried out to the arrangement angles of eccentric shaft.Due to the increase of number of cylinders, the compression moment of multi-cylinder rotary compressor is level and smooth, and vibration reduces.In embodiment 4,4 compression chambers can be consisted of, so can maintain highi degree of accuracy and high rigidity 3 components.By the way, in design in the past, 4 cylinders and 3 central diaphragms totally 7 components are needed.

Embodiment 5:

In compression mechanical part 10 in the design of Figure 11, shown in Fig. 8, eliminate being slidably matched of countershaft 33 and supplementary bearing 55, reduce slippage loss.The external diameter (Dc2) of jack shaft 32 is suitable with the external diameter (Dc1) of main shaft 31, so the bearing performance of intermediate bearing 60b uprises.Therefore, countershaft 33 can be abolished.At this, end plate 56 can seal the 1st compression chamber 11.In addition, fuel supply line 74 is connected to the axle center hole of bent axle 30.

Embodiment 6:

Figure 12 secures spindle end bearing 75 in the upper space of motor 4, at the top board center of housing 2.The auxiliary axis 31a formed in main shaft 31 and spindle end bearing 75 are slidably matched.The main shaft 31 that spindle end bearing 75 prevents from the revolution of rotor 4b from beating bringing vibrates and the internal diameter of main bearing 50 wears away.In addition, spindle end bearing 75, in the upper space of motor 4, can be configured in frame central fixing in the inner circumferential of housing 2.

Embodiment 7:

Embodiment 7 improves relevant with the bearing performance of intermediate bearing 60b.Figure 13 adds circular groove 65 in central diaphragm 60.The side that the abrasion loss of the intermediate bearing 60b usually, slided with jack shaft is many is configured with circular groove 65.The thickness h of central diaphragm 60 is large, adds 2 circular grooves 65 of opening respectively on the two sides of central diaphragm 60.

Figure 14 adds lining 66 in intermediate bearing 60b.The initial stage abrasion of the abrasion performance layer possessed in lining 66 are smooth, have the effect improving bearing performance.

Figure 15 adds rolling bearing 67 in central diaphragm 60.Adding by rolling bearing 67, if there is excessive problem in the footpath of intermediate bearing 60b, can be solved by the nail bearing using external diameter to diminish.

Multi-cylinder rotary compressor of the present utility model can be mounted in air-conditioning, refrigeration plant, water heater, vehicle-mounted refrigerating plant or air conditioner etc.In addition, the open compressor of motor is not used can to utilize yet.

Known in sum, problem to be solved in the utility model is:

The compression mechanical part quantity of multi-cylinder rotary compressor increases, so the rigidity of compression mechanical part reduces and component error can increase.The between centers length (axial length between main shaft to countershaft) of bent axle is large in addition, so rotary vibration is large.Therefore, compressor efficiency and bent axle reliability have problem.

The concrete means solving the employing of above-mentioned problem in the utility model are as follows:

First cylinder 10 is by 2 compression chambers 11 and 12 and central diaphragm 60 integration splitting them, so total error is few, rigidity has superiority.1st eccentric shaft 35 and bent axle 30 are separated and assembled, so the internal diameter of central diaphragm hole 60a is enough little relative to the external diameter of 2 eccentric shafts, bent axle core shift amount can expand.Central diaphragm hole 60a becomes the 3rd bearing of sliding support bent axle 30 in addition.Due to their effect that is multiplied, the reliability of compressor efficiency and bent axle can be improved.

Be that the effect that the utility model brings is as follows by adopting above-mentioned means:

The utility model is that the high-precision cylinder of high rigidity of 2 compression chambers and their central diaphragm integration of segmentation is applied flexibly, and the structure of the separated and assembled of possess in bent axle 1 eccentric shaft.Its result, central diaphragm center hole reduce and can add new bearing in central diaphragms.By their effect that is multiplied, complete the multi-cylinder rotary compressor that high-performance, high reliability and running speed and output have superiority.There is the cylinder part of 2 compression chambers can use, so aligning and assembling operation ratio are easier to as 1 component.

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 (14)

1. a multi-cylinder rotary compressor, is characterized in that, comprises compression mechanical part, and described compression mechanical part comprises:

At least one first cylinder, each described first cylinder comprises integrated two compression chambers and central diaphragm, and described central diaphragm, between described two compression chambers, is accommodated with piston in each described compression chamber, each described piston correspondence is provided with slide plate, and each described central diaphragm has central diaphragm hole;

Be positioned at main bearing and the supplementary bearing of at least one the first cylinder both sides described;

Bent axle, described bent axle comprises main shaft, countershaft, at least two eccentric shafts and jack shaft, described main shaft coordinates with described main bearing, described countershaft coordinates with supplementary bearing, each described piston jacket is on a described eccentric shaft, be connected with described jack shaft between two often adjacent described eccentric shafts, described jack shaft runs through described central diaphragm hole;

In two described eccentric shafts that each described first cylinder is corresponding, at least 1 is separated and assembled with described bent axle.

2. multi-cylinder rotary compressor according to claim 1, it is characterized in that, also comprise at least one group of the second cylinder and intermediate plate, described second cylinder has single compression chamber, described intermediate plate is between adjacent two compression chambers, when described compression chamber is more than three, at least two eccentric shafts and described bent axle are separated and assembled.

3. multi-cylinder rotary compressor according to claim 1, is characterized in that, between described countershaft and described supplementary bearing, between described jack shaft and described central diaphragm hole, at least one is for being slidably matched.

4. multi-cylinder rotary compressor according to claim 1, is characterized in that, the described eccentric shaft of separated and assembled and the combination of described bent axle, can by modes such as embedding, press-in, hot jacket, laser bonding.

5. multi-cylinder rotary compressor according to claim 4, is characterized in that, possesses moment transferring member between described eccentric shaft and described bent axle.

6. multi-cylinder rotary compressor according to claim 1, is characterized in that, the external diameter of described countershaft is less relative to the external diameter of described main shaft.

7. multi-cylinder rotary compressor according to claim 1, is characterized in that, the material of described first cylinder is any one in sintered alloy, aluminum alloy, foundry goods.

8. 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, pottery, powder metallurgy.

9. multi-cylinder rotary compressor according to claim 1, is characterized in that, the material of described eccentric shaft is any one in foundry goods, sintered alloy, carbon steel.

10. multi-cylinder rotary compressor according to claim 2, is characterized in that, the silencing apparatus that the pressurized gas of discharging in compression chamber described in any one are provided with by described intermediate plate inside.

11. multi-cylinder rotary compressors according to claim 1, is characterized in that, described central diaphragm has the circular groove of at least one opening to described central diaphragm.

12. multi-cylinder rotary compressors according to claim 1, is characterized in that, in described central diaphragm hole, possess any one in lining, rolling bearing, nail bearing.

13. multi-cylinder rotary compressors according to claim 1, is characterized in that, arbitrary end face of described central diaphragm is formed as the thrust slip surface supporting described eccentric shaft load.

14. multi-cylinder rotary compressors according to claim 1, is characterized in that, between the spindle end bearing of the end of main shaft described in sliding support and described main bearing, possess the motor driving described main shaft.