CN101684802B - Two-stage rotating type compressor - Google Patents
Two-stage rotating type compressor Download PDFInfo
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- CN101684802B CN101684802B CN 200810151923 CN200810151923A CN101684802B CN 101684802 B CN101684802 B CN 101684802B CN 200810151923 CN200810151923 CN 200810151923 CN 200810151923 A CN200810151923 A CN 200810151923A CN 101684802 B CN101684802 B CN 101684802B
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Abstract
The invention discloses a two-stage rotating type compressor comprising an enclosed container, a low pressure compression component, a high pressure compression component and a rotating shaft; the low pressure compression component is used for performing a first compression on a refrigerant; the high pressure compression component is used for performing a second compression on the compressed refrigerant obtained by the compression of the low pressure compression component; the axial height of a low pressure eccentric part contacted with a low pressure rolling ring is larger than the axial height of a high pressure eccentric part contacted with a high pressure rolling ring on the rotating shaft, and a plurality of balance holes are formed on the low pressure eccentric part. The two-stage rotating type compressor provided by the invention can solve the unbalance problem caused by the quality difference between the low pressure eccentric part and the high pressure eccentric part by the method of forming a plurality of balance holes on the low pressure eccentric part, under the condition that the quality of the low pressure eccentric part is larger than the quality of the high pressure eccentric part on the rotating shaft, thereby reducing the vibration caused by uneven quality and improving the reliability and the compressibility of the compressor.
Description
Technical field
The present invention relates to a kind of which is provided with and have a plurality of eccentric parts, be used for the rotary compressor of the running shaft of transmission rotating force, particularly relate to a kind of 2 stage rotary compressor that can make easy formation state of equilibrium between each different eccentric part of quality.
Background technique
Usually, compressor be a kind of receive power from power generating apparatus such as motor or motors after, the working fluids such as air or refrigerant are compressed, to improve the mechanical device of its pressure, be widely used in the home appliance such as refrigerator, air-conditioning or other industrial field.Compressor can be divided into the compression volume that can be formed for sucking working fluid between piston on it and the cylinder substantially, and piston can carry out straight reciprocating motion in the inside of cylinder, comes reciprocal compressor that working fluid is compressed with this; Rolling between ring and the cylinder of eccentric rotary can be formed for sucking the compression volume of working fluid, rolls ring and can carry out eccentric rotary along the inner peripheral surface of cylinder, comes rotary compressor that working fluid is compressed with this; And the compression volume that can be formed for sucking working fluid between movable orbiting scroll and the static vortex disk, movable orbiting scroll can be rotated along static vortex disk, comes turbocompressor that working fluid is compressed with this.
Wherein rotary compressor develops into again double-rotor rotary compressor and 2 stage rotary compressor.Double-rotor rotary compressor is thereon, a cylinder and one are set respectively on the bottom roll ring, each cylinder and roll the part that ring compresses respectively whole refrigerant.2 stage rotary compressor is thereon, a cylinder and one are set respectively on the bottom roll ring, and two cylinders are interconnected, one of them cylinder and roll the refrigerant of ring compression relatively low pressure, another cylinder and roll ring and then the relatively high pressure refrigerant through the low pressure compression is compressed.
A kind of rotary compressor is disclosed among the Republic of Korea special permission communique spy 1994-0001355.The enclosure of this rotary compressor is provided with motor and runs through the running shaft of motor.In addition, the bottom of motor is provided with cylinder, and cylinder interior is provided with the ring that rolls that is entrenched in the eccentric part on the running shaft and is arranged on the eccentric part outside.Be formed with refrigerant tap hole and refrigerant ostium on the cylinder, and be provided with between refrigerant tap hole and the refrigerant ostium be used to the baffle plate that prevents that unpressed low pressure refrigerant and the high pressure refrigerant that has compressed from mixing mutually.In addition, in order to allow the ring that rolls of eccentric rotary keep in touch state with baffle plate, the other end of baffle plate also is provided with spring.When the driven by motor running shaft rotates together, eccentric part with roll ring and will be rotated along the inner peripheral surface of cylinder, thereby refrigerant is compressed, will discharge by the refrigerant tap hole through the refrigerant of overcompression.
Republic of Korea openly speciallys permit and discloses a kind of double-rotor rotary compressor in the communique 10-2005-0062995.Fig. 1 is this double-rotor rotary compressor longitudinal construction schematic diagram.As shown in Figure 1, this double-rotor rotary compressor is provided with the identical cylinder 1035 of two power, 1045 and intermediate plate 1030, compares with common compressor, and its power is doubled.Therefore each compression volume is independently of each other refrigerant to be compressed in this double-rotor rotary compressor, two cylinders 1035,1045 and form two compression volumes with same capability respectively between its inner two eccentric part 1031a, 1041a that roll.Because two eccentric part 1031a, 1041a have identical size and quality, even therefore two eccentric part 1031a, 1041a form along different directions on running shaft 1031, when running shaft 1031 is rotated, owing to the uneven vibration that causes of weight is also not too large.
But for 2 stage rotary compressor, the compression process in each compression volume has the advantages that to carry out continuously.Therefore, at two cylinders and be formed with respectively the different low pressure compression volume of capacity and high pressure compressed space along between two eccentric parts of its inner rotation respectively.At this moment, comparing with the low pressure compression volume that relative pressure is low, is advisable with less in the high pressure compressed space that pressure is high, therefore is difficult to adopt the running shaft that has two eccentric parts big or small and identical in quality as double-rotor rotary compressor.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of mutually different compression volume of compression volume that is formed with on it, even and adopt the running shaft of eccentric part that has a plurality of different direction and size on it, the 2 stage rotary compressor that also can under state of equilibrium, carry out work.
In order to achieve the above object, 2 stage rotary compressor provided by the invention mainly comprises seal container, low pressure compression assembly and high pressure compressed assembly; Its mesolow compression assembly is arranged in the seal container, can carry out the 1st compression to refrigerant when low nip drum ring rolls along low-pressure cylinder inside; High pressure compressed assembly and low pressure compression assembly are interconnected, and can carry out to the refrigerant that obtains compressing in the low pressure compression assembly the 2nd compression when high nip drum ring rolls along high pressure cylinder inside; Described 2 stage rotary compressor also comprises running shaft, on the running shaft with the axial height of the contacted low pressure eccentric part of low nip drum ring greater than with the axial height of the contacted high pressure eccentric part of high nip drum ring, and be formed with a plurality of equalizing orifices on the low pressure eccentric part.
Described a plurality of equalizing orifice is formed on the eccentric part of low pressure eccentric part.
Described a plurality of equalizing orifice axially being formed through along the low pressure eccentric part.
The setting of described a plurality of equalizing orifices should be satisfied the condition of mass ratio in 1～1.5 scope of low pressure eccentric part and high pressure eccentric part.
2 stage rotary compressor provided by the invention is in the situation of quality greater than high pressure eccentric part quality of low pressure eccentric part on the running shaft, utilization is the imbalance problem that causes of poor quality between the method for a plurality of equalizing orifices of low pressure eccentric part formation solves owing to above-mentioned low pressure eccentric part and high pressure eccentric part, therefore can reduce owing to the uneven vibration that causes of quality, and can improve reliability and the compression performance of compressor.
Description of drawings
Fig. 1 is the double-rotor rotary compressor longitudinal construction schematic diagram of prior art.
Fig. 2 is the refrigerating and heating systems structural representation that 2 stage rotary compressor provided by the invention is installed.
Fig. 3 is 2 stage rotary compressor one embodiment's longitudinal construction schematic diagram provided by the invention.
Fig. 4 is 2 stage rotary compressor mesolow compression assembly transverse sectional view provided by the invention.
Fig. 5 and Fig. 6 are that part-structure is overlooked and elevational schematic view in the 2 stage rotary compressor provided by the invention.
Fig. 7 is part-structure sectional view in the 2 stage rotary compressor provided by the invention.
Fig. 8 and Fig. 9 are respectively running shaft one embodiment's solid and lateral cross section sectional view on the 2 stage rotary compressor provided by the invention.
Figure 10 is the vibration chart relevant with the mass ratio of high pressure eccentric part and low pressure eccentric part.
Figure 11 a and Figure 11 b are respectively prior art and 2 stage rotary compressor provided by the invention vibration chart.
Symbol description among the figure:
100: 2 stage rotary compressor 110: motor 120: the low pressure compression assembly
130: high pressure compressed assembly 140: intermediate plate 151: intake channel
152: outlet pipe 153: ascending pipe 180: internal path
Embodiment
Below in conjunction with the drawings and specific embodiments 2 stage rotary compressor provided by the invention is elaborated.
Fig. 2 is the refrigerating and heating systems structural representation that 2 stage rotary compressor provided by the invention is installed.As shown in Figure 2, this refrigeration system mainly comprises 2 stage rotary compressor 100, indoor heat converter 300, outdoor heat converter 400, gas-liquid separator 500 and four-way valve 600.Wherein, indoor heat converter 300 is arranged in the indoor set, and 2 stage rotary compressor 100, outdoor heat converter 400 and gas-liquid separator 500 are arranged in the outdoor unit.When this system heats circulation time, refrigerant through 2 stage rotary compressor 100 compressions will in the indoor heat converter 300 in the inflow indoor set, will carry out heat exchange and produce condensation with its ambient air when this compression refrigerant flows through indoor heat converter 300 through four-way valve 600.Refrigerant through condensation will flow to expansion valve, this refrigerant will become low pressure refrigerant through expansion valve the time, then flow to gas-liquid separator 500, and in gas-liquid separator 500, gaseous state and liquid refrigerants are separated from each other, in the last liquid refrigerants inflow outdoor heat exchanger 400.Liquid refrigerants will carry out heat exchange and produce evaporation with its ambient air when flowing through outdoor heat converter 400, will flow into liquid container 200 through the gaseous coolant of pervaporation.The refrigerant that flows through at last liquid container 200 will flow into again by refrigerant intake channel 151 the low pressure compression assembly in the not shown 2 stage rotary compressor 100.In addition, the gaseous coolant that obtains separating in gas-liquid separator 500 will flow in the 2 stage rotary compressor 100 by ascending pipe 153.Press refrigerant in the middle of in the low pressure compression assembly of 2 stage rotary compressor 100, obtaining compressing and will together flow into by the refrigerant that ascending pipe 153 flows in the high pressure compressed assembly of not shown 2 stage rotary compressor 100 and again compress, at last again by refrigerant discharge tube 152 and discharged to 2 stage rotary compressor 100 outsides.
Fig. 3 is 2 stage rotary compressor one embodiment's longitudinal construction schematic diagram provided by the invention.As shown in Figure 3, the 2 stage rotary compressor 100 that provides of the present embodiment is to be provided with successively from bottom to top low pressure compression assembly 120, intermediate plate 140, high pressure compressed assembly 130 and motor 110 in the inside of its seal container 101.In addition, 2 stage rotary compressor 100 also comprises the refrigerant intake channel 151 that runs through seal container 101 and be connected with liquid container 200, and with the refrigerant discharge tube 152 of compression refrigerant discharged to the outside.Wherein motor 110 comprises stator 111, rotor 112 and running shaft 113.Stator 111 is by the stacked electromagnetic steel sheet of multi-disc and is wound on the coil on the above-mentioned stacked electromagnetic steel sheet and consists of.Rotor 112 also is to be made of stacked electromagnetic steel sheet.Running shaft 113 runs through the central authorities of rotor 112 and is fixed on the rotor 112.After motor 110 turn-on current, under the electromagnetic force that produces between stator 111 and the rotor 112, rotor 112 will be rotated, and the running shaft 113 that is fixed on the rotor 112 also will together rotate with rotor 112.In addition, running shaft 113 runs through the central authorities of high pressure compressed assembly 130, intermediate plate 140 and low pressure compression assembly 120 from rotor 112 and extends to the outside of low pressure compression assembly 120.Intermediate plate 140 is every between low pressure compression assembly 120 and high pressure compressed assembly 130, and begins the order setting with low pressure compression assembly 120-intermediate plate 140-high pressure compressed assembly 130 from the bottom.Certainly, also can begin from the bottom order setting with high pressure compressed assembly 130-intermediate plate 140-low pressure compression assembly 120.In addition, the sequence independence that arranges with low pressure compression assembly 120, intermediate plate 140 and high pressure compressed assembly 130, assembly bottom and top that consist of are respectively equipped with lower bearing 161 and upper bearing 162 by above-mentioned three is stacked, be used for supporting rotating shaft 113, the weight of carrying simultaneously each parts on the above-mentioned high low pressure compression assembly.Wherein upper bearing 162 is to be welded on the inner peripheral surface of seal container 101 in three spot welding modes.The refrigerant intake channel 151 that low pressure compression assembly 120 inserts with run through seal container 101 from the outside is connected.In addition, the bottom of low pressure compression assembly 120 is provided with lower bearing 161 and lower cover 171, presses chamber Pm in the middle of being formed with between lower bearing 161 and the lower cover 171.The middle chamber Pm that presses is the space that the refrigerant that obtains compressing in low pressure compression assembly 120 is discharged from, to flow into the space of keeping in before the high pressure compressed assembly 130 as refrigerant, it plays the buffer space effect of coolant path between low pressure compression assembly 120 and high pressure compressed assembly 130.
The below describes the middle chamber Pm structure of pressing that is formed on lower bearing 161 bottoms.As an example, the center portion of lower bearing 161 is inserted and is arranged on the running shaft 131, and the shape that 171 contacted circumferential location are downward protrusion is covered by its up and down section.Be formed with the hole that running shaft 131 is run through on the lower cover 171, and have can with the writing board shape of lower bearing 161 close contacts.Wherein, the circumferential location that downward protrusion forms on the lower bearing 161 is assembled on the low-pressure cylinder 121 by bolt with the planar circumferential location of lower cover 171.As another embodiment, only have the center portion of inserting/arranging running shaft 113 to protrude on the lower bearing 161 downwards, its outside then is slab construction, have on the lower cover 171 and make the center portion in the hole that running shaft 113 runs through be planar, its circumferential location then raises up and forms the stage structure.Here, the planar circumferential location of lower bearing 161 is Staging circumferential location protruding upward and is assembled on the low-pressure cylinder 121 by bolt on lower cover 171.Can simplify in the case the structure of lower bearing 161, thereby can reduce the number of working processes, and can produce lower cover 171 by punch process at an easy rate.Certainly, the shape of lower bearing 161 and lower cover 171 and assembling method are not limited to top content.Here be that the structure of pressing chamber Pm to be formed on the lower bearing 161 take the centre is illustrated as example.But the middle chamber Pm that presses also can be formed on in upper bearing 162 and the intermediate plate 140 any.
Upper bearing 162 tops that are arranged on high pressure compressed assembly 130 upper ends are provided with not shown exhaust port, can discharge the high pressure refrigerants from high pressure compressed assembly 130 by this exhaust port, then the refrigerant discharge tube 152 by being positioned at seal container 101 upper ends is discharged to the outside.The inside of lower bearing 161, low pressure compression assembly 120, intermediate plate 140 and high pressure compressed assembly 130 is formed with internal path 180, thereby can make refrigerant flow to high pressure compressed assembly 130 from low pressure compression assembly 120.Above-mentioned internal path 180 is substantially parallel with running shaft 113, namely arranges in upright mode.Therefore in addition, internal path 180 is not independent pipe, can make the ascending pipe 153 that flows into 2 stage rotary compressors 100 inside from gas-liquid separator 500 isolated refrigerants can be arranged on random position on the internal path 180.Such as, can in the middle of forming, press some in the lower bearing 161, intermediate plate 140, high pressure cylinder 131 of chamber Pm to form not shown penetration hole, then ascending pipe 153 is inserted in the above-mentioned penetration hole, so that refrigerant flows into, further improves compression efficiency with this.
Fig. 4 is 2 stage rotary compressor mesolow compression assembly transverse sectional view provided by the invention.As shown in Figure 4, low pressure compression assembly 120 comprises that low-pressure cylinder 121, low pressure eccentric part 122, low nip drum ring 123, low pressure baffle plate 124, low pressure elastic member 125, lowpressure stream hand-hole 126 and middle pressure portal 127.Running shaft 113 runs through the central position of low-pressure cylinder 121, and is fixed with low pressure eccentric part 122 on the running shaft 113.Here, low pressure eccentric part 122 can be integrally formed on the running shaft 113.In addition, the outside of low pressure eccentric part 122 rotatably is equipped with low nip drum ring 123.When running shaft 113 rotation, low nip drum ring 123 will be rotated in the mode of rolling along the inner peripheral surface of low-pressure cylinder 121.The both sides of low pressure baffle plate 124 are formed with respectively lowpressure stream hand-hole 126 and middle pressure portals 127.In addition, the inner space of low-pressure cylinder 121 is divided into the low pressure refrigerant inflow S of section by low pressure baffle plate 124 and low nip drum ring 123
1Press refrigerant discharge portion Dm, the wherein S of low pressure refrigerant inflow section with the centre
1In comprise low pressure refrigerant ostium 126, middle press then comprise in the refrigerant discharge portion Dm in the middle of pressure portal 127, therefore compress forward and backward refrigerant and coexist as in the low-pressure cylinder 121.In addition, keep in touch state for making low pressure baffle plate 124 and low nip drum ring 123, can utilize low pressure elastic member 125 to apply elastic force to low pressure baffle plate 124.For low pressure baffle plate 124 is installed, is formed at baffle holes 124h on the low-pressure cylinder 121 and laterally runs through and be formed on the low-pressure cylinder 121.Can come by baffle holes 124h the movement of guide baffle plate 124, can then run through low-pressure cylinder 121 to the low pressure elastic member 125 that low pressure baffle plate 124 applies elastic force, and extend to seal container 101 inside.That is, an end of low pressure elastic member 125 contacts with low pressure baffle plate 124, and the other end then contacts with seal container 101, thereby can make low pressure baffle plate 124 and low nip drum ring 123 remain that the mode of contact condition holds out against low pressure baffle plate 124.
In addition, be formed with the refrigerant that can make through 120 compressions of low pressure compression assembly on the low-pressure cylinder 121 and flow through the middle chamber Pm of pressure that is formed on the lower bearing 161, and then flow into the middle intercommunicating pore 120a that presses of high pressure compressed assembly 130 inside.Overlapped in order to prevent with the refrigerant intake channel 151 that is inserted in lowpressure stream hand-hole 126 inside, the middle intercommunicating pore 120a that presses should stagger mutually with the position of refrigerant intake channel 151, to avoid internal path 180 and refrigerant intake channel 151 overlapped.In addition, even middle part-structure and refrigerant intake channel 151 overlaids of pressing intercommunicating pore 120a, middle pressure intercommunicating pore 120a also should have can make the middle refrigerant of pressing press chamber Pm to flow to the structure of high pressure compressed assembly 130 from the centre.But in this case, internal path 180 can cause the pressure loss with refrigerant intake channel 151 equitant zones, and is therefore not too suitable.In addition, when refrigerant travel back across refrigerant intake channel 151 around the time, might reduce pressure.
As shown in Figure 4, when running shaft 113 rotation, low pressure eccentric part 122 also is rotated, and low nip drum ring 123 will be rotated in the mode of rolling along the inner peripheral surface of low-pressure cylinder 121 simultaneously.At this moment, the S of low pressure inflow section
1Volume become large, thereby make the low pressure inflow S of section
1Be in low-pressure state, refrigerant flows into by lowpressure stream hand-hole 126 as a result.On the contrary, the middle volume of discharge portion Dm of pressing diminishes, thereby presses the refrigerant in the discharge portion Dm to compress the centre, and portals by middle pressure and 127 to discharge.Along with the lasting rotation of low pressure eccentric part 122 and low nip drum ring 123, the low pressure inflow S of section
1Press the volume of discharge portion Dm to continue to change with the centre, every rotation is once discharged one time refrigerant.
Fig. 5 and Fig. 6 are that part-structure is overlooked and elevational schematic view in the 2 stage rotary compressor provided by the invention.Fig. 7 is part-structure sectional view in the 2 stage rotary compressor provided by the invention.Such as Fig. 5～shown in Figure 7, in 2 stage rotary compressor provided by the invention, stack successively from bottom to top and be provided with low pressure compression assembly 120, intermediate plate 140 and high pressure compressed assembly 130.As previously mentioned, low pressure refrigerant flow into the inside of low-pressure cylinder 121 by refrigerant intake channel 151 and lowpressure stream hand-hole 126 and is compressed, and then portals 127 discharged to the space that is limited by low pressure compression assembly 120 bottom surfaces and lower bearing 161 and lower cover 171 by middle pressure---the middle chamber Pm of pressure.Be formed with on the lower bearing 161 can with low pressure compression assembly 120 in the middle of the pressure overlapped middle pressure in the 127 positions 161h that portals that portals, and the portal bottom of 161h of middle pressure is provided with not shown valve.When can pressing the refrigerant that compresses among the discharge portion Dm to reach certain pressure in the centre, opens on this valve, so that this refrigerant is pressed chamber Pm discharged to the centre.Press in the middle of being discharged to chamber Pm refrigerant will by be formed on the lower bearing 161 in the middle of press intercommunicating pore 161a to flow through to be formed on the low-pressure cylinder 121 in the middle of press intercommunicating pore 120a and be formed on the intermediate plate 140 in the middle of press intercommunicating pore 140a, then enter the inside of groove 130a inflow high pressure compressed assembly 130 by being formed at middle baric flow on the high pressure cylinder 131.Press in the middle of on the lower bearing 161 on intercommunicating pore 161a, the low pressure compression assembly 120 in the middle of press on intercommunicating pore 120a, the intermediate plate 140 in the middle of press middle baric flow on intercommunicating pore 140a and the high pressure compressed assembly 130 to enter the internal path 180 that groove 130a formation can make the refrigerant that obtains compressing flow through in low pressure compression assembly 120.Wherein, the middle baric flow on the high pressure compressed assembly 130 enters groove 130a and forms with the mode that can be communicated with the high pressure cylinder 131 inner spaces shape with tipper.Middle baric flow enters the bottom part-structure of groove 130a and the middle intercommunicating pore 140a that presses on the intermediate plate 140 is in contact with one another, thereby forms the part of internal path 180.In the middle of overcompression, press refrigerant to enter the inside that groove 130a flows into high pressure cylinder 131 by middle baric flow.When press after refrigerant flows into high pressure compressed assemblies 130 by internal path 180 centre, high pressure compressed assembly 130 will press refrigerant to be compressed into the high pressure refrigerant centre with the working principle identical with low pressure compression assembly 120.
As mentioned above, pressing the internal path 180 of refrigerant for delivery of the centre is not to form by independently managing, but makes its inside that is formed on seal container 101, can reduce noise and vibration like this, and can shorten internal path 180, therefore can reduce the refrigerant pressure loss that is caused by resistance.In addition, the above presses situation that chamber Pm is formed on lower bearing 161 to be illustrated as example take the centre.But the middle chamber Pm that presses also can be formed on in upper bearing 162 and the intermediate plate 140 any.At this moment, although concrete structure can be different, but still internal path 180 can be formed on the inside of high and low pressure compression assembly, and by internal path 180 will in low pressure compression assembly 120, obtain compressing in the middle of press refrigerant to be transported in the high pressure compressed assembly 130.At this moment, block internal path 180 for fear of refrigerant intake channel 151, when observing from the top, should stagger mutually with refrigerant intake channel 151 in the position that the middle pressure intercommunicating pore 120a on the low pressure compression assembly 120 of formation internal path 180, the middle pressure intercommunicating pore 140a on the intermediate plate 140 and the middle baric flow on the high pressure compressed assembly 130 enter groove 130a.
In addition, the middle intercommunicating pore 161a that presses on lower bearing 161 is overlapped with the refrigerant intake channel 151 that is connected on the low-pressure cylinder 121, and the middle intercommunicating pore 161a that presses should can avoid the position formation of refrigerant intake channel 151 insertion positions.Refrigerant intake channel 151 is inserted in the lowpressure stream hand-hole 126 that is formed on the low-pressure cylinder 121, and lowpressure stream hand-hole 126 is near the low pressure baffle plate patchhole 124h that is used for inserting low pressure baffle plate 124.Lowpressure stream hand-hole 126 from low pressure baffle plate 124 more away from, dead point that can not compression refrigerant in low-pressure cylinder 121 inner spaces is larger.
In addition, it is not that bottom from high pressure cylinder 131 extends through its top that the middle baric flow on the high pressure cylinder 131 enters groove 130a, but the formation that is inclined upwardly from the bottom of high pressure cylinder 131.Here, middle baric flow enters the position that groove 130a is positioned at close high pressure baffle holes 134h, then is inserted with not shown high pressure baffle plate in the high pressure baffle holes 134h.Identical with low pressure compression assembly 120, middle baric flow enters groove 130a to be advisable near above-mentioned high pressure baffle plate, can reduce like this dead point in high pressure cylinder 131 inner spaces.
Low pressure baffle plate 124 and not shown high pressure baffle plate are positioned on the same axis, therefore, be formed on the lower bearing 161 in the middle of press intercommunicating pore 161a and be formed on middle baric flow on the high pressure cylinder 131 to enter groove 130a and can not be positioned on the same axis, but phase is across a certain distance in the horizontal direction.As another embodiment of the present invention, in order to press the middle baric flow on intercommunicating pore 161a and the high pressure cylinder 131 to enter groove 130a in the centre that connects on the lower bearing 161, can in the middle of on the low-pressure cylinder 121, press the middle intercommunicating pore 140a that presses on intercommunicating pore 120a and the intermediate plate 140 to make substantially spiral-shaped, and make on the low-pressure cylinder 121 in the middle of press on intercommunicating pore 120a and the intermediate plate 140 in the middle of press intercommunicating pore 140a to interconnect, to form the spirality intercommunicating pore.Here, press intercommunicating pore 161a to link to each other in the middle of on an end of spirality intercommunicating pore and the lower bearing 161, the other end then with high pressure cylinder 131 on middle baric flow enter groove 130a and join.In addition, middle pressure intercommunicating pore 120a one end on the low-pressure cylinder 121 runs through on the middle pressure intercommunicating pore 161a that is communicated to lower bearing 161.Namely, press in the middle of on the low-pressure cylinder 121 on intercommunicating pore 120a and the lower bearing 161 in the middle of press intercommunicating pore 161a to join an end vertically be formed through, middle other position of pressing intercommunicating pore 120a is then from the end to end of perforation shape twist on the whole.In addition, press intercommunicating pore 140a in contrast in the middle of on the intermediate plate 140, the other end in this hole, namely with upper cylinder 130 on middle baric flow enter the end that groove 130a joins and vertically form, from upper cylinder 130 on middle baric flow enter then shape twist on the whole of end to end that groove 130a joins.
Press in the middle of on the low-pressure cylinder 121 on intercommunicating pore 120a and the intermediate plate 140 in the middle of press intercommunicating pore 140a twist during shape, refrigerant flow through on the low-pressure cylinder 121 in the middle of press on intercommunicating pore 120a and the intermediate plate 140 in the middle of when pressing intercommunicating pore 140a suffered resistance can diminish.Certainly, the middle pressure intercommunicating pore 140a on the middle pressure intercommunicating pore 120a on the low-pressure cylinder 121 and the intermediate plate 140 not only can have spiral-shaped, can also have the shapes such as circular arc.Usually lower bearing 161, low-pressure cylinder 121, intermediate plate 140, high pressure cylinder 131 and upper bearing 162 are to assemble by bolt.Here, refrigerant intake channel 151 should be avoided in the formation position that is used for assembly hole 161b, 120b, 130b, 140b, the 162b of erection bolt, middle intercommunicating pore 161a, 120a, 140a, 162a, the middle baric flow of pressing enters the portal internal path 180 of the plurality of positions such as 127 and formation of groove 130a and middle pressure.In addition, assembly hole 161b, 120b, 130b, 140b, 162b will form three places at least, to satisfy the condition that assembling force can be evenly dispersed on the whole compressor assembly 105.In addition, since with on the lower bearing 161 in the middle of press middle baric flow on intercommunicating pore 161a and the high pressure cylinder 131 to enter groove 130a to compare, press the middle intercommunicating pore 140a length of pressing on intercommunicating pore 120a and the intermediate plate 140 longer in the middle of on the low-pressure cylinder 121, will hinder like this and form a plurality of assembly hole 161b, 120b, 130b, 140b, 162b, therefore, when the middle pressure intercommunicating pore 140a on the middle pressure intercommunicating pore 120a on the low-pressure cylinder 121 and the intermediate plate 140 has spiral or circular shape, can in the middle of spirality or circular arc, press intercommunicating pore 120a, the center portion of 140a forms assembly hole 120b, 140b so just can be with assembly hole 161b, 120b, 130b, 140b, 162b evenly is arranged on the whole compressor assembly 105.
Fig. 8 and Fig. 9 are respectively running shaft one embodiment's solid and lateral cross section sectional view on the 2 stage rotary compressor provided by the invention.Such as Fig. 8, shown in Figure 9, on the running shaft 113 in opposite direction off-centre be combined with low pressure eccentric part 122 and high pressure eccentric part 132.In order to reduce vibration, low pressure eccentric part 122 and high pressure eccentric part 132 have the phase difference of 180 degree usually.In addition, the inside of running shaft 113 is hollow shape, thereby forms endoporus 113h, then is formed with machine oil intercommunicating pore 113a on low pressure eccentric part 122 and the high pressure eccentric part 132.In addition, insert board-like stirrer 113b by the helical bending among the endoporus 113h of running shaft 113.When running shaft 113 rotation, stirrer 113b will together be rotated thereupon, at this moment, the machine oil that is positioned at seal container 101 bottoms will upwards flow along stirrer 113b, wherein a part flows to the inside of low-pressure cylinder 121, intermediate plate 140 and high pressure cylinder 131 by machine oil intercommunicating pore 113a, with lubricated low nip drum ring 123 and the not shown parts such as high nip drum ring.Particularly, consider that the pressure of low pressure compression assembly 120 compression volumes is less than the pressure of high pressure compressed assembly 130 compression volumes, therefore the compression volume of low pressure compression assembly 120 is greater than the factors such as high pressure compressed assembly 130 compression volumes, so, although big or small identical on radial direction of low pressure eccentric part 122 and high pressure eccentric part 132, the axial height of low pressure eccentric part 122 is larger more than 40% than the axial height of high pressure eccentric part 132.Therefore, if make low pressure eccentric part 122 and high pressure eccentric part 132 with identical material, then the quality of low pressure eccentric part 122 will greater than high pressure eccentric part 132, will cause because the quality of low pressure eccentric part 122 and high pressure eccentric part 132 is uneven vibration like this when running shaft 113 is rotated.Thereby in order to reduce owing to the uneven vibration that causes of quality, low pressure eccentric part 122 should be advisable to have identical quality with high pressure eccentric part 132.For this reason, can make low pressure eccentric part 122 and high pressure eccentric part 132 with mutually different materials.But better method is to form a plurality of equalizing orifice 122h at low pressure eccentric part 122, to reduce the quality of low pressure eccentric part 122.Certainly, a plurality of equalizing orifice 122h can run through on the eccentric position that is formed on low pressure eccentric part 122 every a determining deviation along the running shaft direction.In addition, the size of above-mentioned a plurality of equalizing orifice 122h and number need to set according to low pressure eccentric part 122 and the of poor quality of high pressure eccentric part 132.
Figure 10 is the vibration chart relevant with the mass ratio of high pressure eccentric part and low pressure eccentric part.As mentioned above, in the present invention, when the size of low pressure eccentric part 122 during greater than high pressure eccentric part 132, can form a plurality of equalizing orifice 122h at low pressure eccentric part 122, to reduce of poor quality between low pressure eccentric part 122 and the high pressure eccentric part 132.Under this prerequisite, as shown in figure 10, when running shaft 113 was rotated with specific speed, when the ratio of the quality m2 of the quality m1 of low pressure eccentric part 122 and high pressure eccentric part 132 was in 1～1.5 scope, the effect that reduces vibration was best.That is, remaining on number and the size of setting equalizing orifice 122h in 1～1.5 the scope with the mass ratio m1/m2 with low pressure eccentric part 122 and high pressure eccentric part 132 is advisable.
Figure 11 a and Figure 11 b are respectively prior art and 2 stage rotary compressor provided by the invention vibration chart.Shown in Figure 11 a, when the 2 stage rotary compressor of prior art is worked, because the quality m1 of low pressure eccentric part is approximately larger 40% than the quality m2 of high pressure eccentric part, in the case, by the uneven and the highest vibration that produces 100 μ m on specific speed of quality.On the contrary, shown in Figure 11 b, when 2 stage rotary compressor work provided by the invention, owing to being formed with a plurality of equalizing orifice 122h at low pressure eccentric part 122, therefore the quality m1 of low pressure eccentric part 122 is identical with the quality m2 of high pressure eccentric part 132, so the highest vibration that produces 30 μ m on specific speed.
Claims (4)
1. a 2 stage rotary compressor mainly comprises seal container (101), low pressure compression assembly (120) and high pressure compressed assembly (130); Its mesolow compression assembly (120) is arranged in the seal container (101), when low nip drum ring (123) can carry out the 1st compression along low-pressure cylinder (121) to refrigerant when roll in inside; High pressure compressed assembly (130) is interconnected with low pressure compression assembly (120), when high nip drum ring can carry out to the refrigerant that obtains compressing the 2nd compression along high pressure cylinder (131) in low pressure compression assembly (120) when roll in inside; It is characterized in that: described 2 stage rotary compressor also comprises running shaft (113), the upper axial height with the contacted low pressure eccentric part of low nip drum ring (123) (122) of running shaft (113) greater than with the axial height of the contacted high pressure eccentric part of high nip drum ring (132), and be formed with a plurality of equalizing orifices (122h) on the low pressure eccentric part (122).
2. 2 stage rotary compressor according to claim 1, it is characterized in that: described a plurality of equalizing orifices (122h) are formed on the eccentric part of low pressure eccentric part (122).
3. 2 stage rotary compressor according to claim 2 is characterized in that: described a plurality of equalizing orifices (122h) axially being formed through along low pressure eccentric part (122).
4. each described 2 stage rotary compressor in 3 according to claim 1 is characterized in that: the setting of described a plurality of equalizing orifices (122h) should be satisfied the condition of mass ratio (m1/m2) in 1～1.5 scope of low pressure eccentric part (122) and high pressure eccentric part (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810151923 CN101684802B (en) | 2008-09-27 | 2008-09-27 | Two-stage rotating type compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810151923 CN101684802B (en) | 2008-09-27 | 2008-09-27 | Two-stage rotating type compressor |
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| CN101684802A CN101684802A (en) | 2010-03-31 |
| CN101684802B true CN101684802B (en) | 2013-02-06 |
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| CN 200810151923 Active CN101684802B (en) | 2008-09-27 | 2008-09-27 | Two-stage rotating type compressor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102691661B (en) * | 2011-03-23 | 2014-07-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotary compressor |
| CN104963867A (en) * | 2015-07-02 | 2015-10-07 | 广东美芝制冷设备有限公司 | Rotary compressor and crankshaft thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601126A (en) * | 2003-09-27 | 2005-03-30 | 乐金电子(天津)电器有限公司 | Crankshaft of rotary compressor |
| CN2816420Y (en) * | 2005-08-18 | 2006-09-13 | 乐金电子(天津)电器有限公司 | Honey comb-like rotor structure of compressor |
| CN2931908Y (en) * | 2006-06-07 | 2007-08-08 | 上海日立电器有限公司 | Band axle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100718567B1 (en) * | 2006-11-27 | 2007-05-15 | 성주환 | Direct crankshaft for air compressor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601126A (en) * | 2003-09-27 | 2005-03-30 | 乐金电子(天津)电器有限公司 | Crankshaft of rotary compressor |
| CN2816420Y (en) * | 2005-08-18 | 2006-09-13 | 乐金电子(天津)电器有限公司 | Honey comb-like rotor structure of compressor |
| CN2931908Y (en) * | 2006-06-07 | 2007-08-08 | 上海日立电器有限公司 | Band axle |
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