CN1035450C

CN1035450C - Rotary compressor

Info

Publication number: CN1035450C
Application number: CN 93118612
Authority: CN
Inventors: 孙力群
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-07
Filing date: 1993-10-07
Publication date: 1997-07-16
Anticipated expiration: 2013-10-07
Also published as: CN1101106A

Abstract

The present invention relates to a rotary compressor which is mainly composed of an outer rotor, an inner rotor and a sealed guide tile, wherein the inner rotor is eccentric with an inner circle of a cylinder body and is tangential with an inner wall circle of the cylinder body. When the inner rotor and the outer rotor synchronously rotate, the space between the rotors is continuously enlarged and reduced, and thereby, air induction, compression and exhaustion are completed. The present invention has the advantages of unique concept, simple structure and easy machining and wide popularization.

Description

A kind of rotary compressor

The present invention relates to positive displacement compressor, particularly rotary compressor.

Patent documentation SU1788328.A1 has proposed a kind of piston that comprises by the rotation of variable-angle speed, forms the periodically variable rotary compressor of volume of working room.Because this compressor is to rely on constantly to change two piston operation angular velocity when work, the air-breathing of compressor finished in the space that periodically forms and change the working room, compression, the process of exhaust, therefore, this compressor must have a mechanism that is used for controlling and changing two piston operation angular velocity, and such mechanism will increase the complexity of this compression mechanism fabrication technique greatly, difficulty and cost, and the problem of the axial end of this compressor sealing is not easy to solve.

The purpose of this invention is to provide a kind of improved rotary compressor, it can solve the problem of the axial end sealing of rotary compressor effectively, improves the working pressure of compressor, and simple in structure, there is not air inlet and exhaust valve, the rotating speed height, the efficient height is made easy processing, and is easy to maintenance.

The scheme that the present invention solves is: circle tube cylinder (1) is provided with import (6) and outlet (5), the middle part of its inwall circle is cut mutually by an eccentric circle, outlet (5) is located at cuts the place mutually, external rotor (2) is housed in the cylinder body (1), internal rotor (4), sealing guiding tile (3), external rotor (2) is a hollow disc, sealing guiding tile (3) is housed in the side direction small sircle hole (13), internal rotor (4) is a disk that a sector notch is arranged, be clipped in the external rotor (2), the solid section in the middle of the external rotor (2) stretches into the sector notch of internal rotor (4), and line shaft (8) passes the axis hole and the relative off-centre with cylinder body (1) of internal rotor (4).

Settle because of internal rotor is eccentric with respect to the cylinder body circle, and the internal rotor diameter formed a meniscate space less than the internal diameter of cylinder body circle between internal rotor and inboard wall of cylinder block, this space is exactly the swept volume of compressor.When internal rotor rotates under external force along clockwise direction, promote external rotor by the sealing guiding tile and rotate.External rotor is divided into V1 with the crescent-shaped space in the compressor, two sizes of V2 are in the space that constantly changes, because internal rotor is to be eccentric arrangement with external rotor, two rotors are equidirectional when rotating with rotating speed, also formed a size between two rotors in the SPACE V 3 that constantly changes, this V3 communicates with V2, utilizes V1, V2, the continuous variation of V3 size, finish air-breathing, the compression, the process of exhaust.

Advantage of the present invention is:

1, because in having adopted, outer-rotor structure is converted into the curved surface sealing of inboard wall of cylinder block with the contradiction of axial end sealing, thereby has effectively solved the difficult problem of the axial end sealing of common rotary compressor, manufacturing is easy.

2, outlet is located at the middle part of spill arch groove, utilize the characteristics of internal rotor sealing spill arch groove to seal up outlet, make compressor can not want air inlet and exhaust valve, reduced manufacture cost and rate of fault.

3, because each sealing part of compressor is face seal, there is not linear sealing, so working pressure, efficient is than common rotary compressor height.

4, because in, external rotor all is to rotate around the center of circle of oneself when work, does not have eccentric rotary, does not have air inlet and exhaust valve again, so rotating speed can be very high.

5, do inlet if open a hole at the M place of compressor casing, former inlet changes outlet into, and former outlet is blocked, and inhour rotation then this compressor can be used as the liquid pump of little discharge capacity again.

Below in conjunction with accompanying drawing invention is described in further detail

Fig. 1: the section plan of compressor

Fig. 2: the longitudinal section of compressor

Fig. 3: the compressor section plan that is positioned at air inlet and compression process

Fig. 4: the compressor section plan that is positioned at air inlet and exhaust process

Fig. 5: the compressor section plan the when breach of internal rotor goes to spill arch groove position

Fig. 6: inner rotor core figure

The plan view of Fig. 7: Fig. 6

The B-B sectional view of Fig. 8: Fig. 6

Fig. 9: outer-rotor structure figure

The A-A sectional view of Figure 10: Fig. 9

Figure 11: sealing guiding tile structural drawing

The plan view of Figure 12: Figure 11

Figure 13: the structural drawing of end cap

The A-A sectional view of Figure 14: Figure 13

Among the figure:

1. cylinder body 2. external rotors 3. seal guiding tiles 4. internal rotors

5. export 6. imports, 7. keys, 8. line shafts

9. chute 10. feather keys 11. end caps 12. axle journals

13. small sircle hole

With reference to Fig. 1,2,3, the cross section of inboard wall of 4,5 cylinder bodies (1) is circular, and cylinder body is provided with import (6), one is eccentric with respect to the cylinder body circle, the circle that diameter equals the external diameter of internal rotor (4) cuts mutually at AB place, circle tube cylinder inwall middle part, forms the AB arch groove of a spill at the AB place at inboard wall of cylinder block middle part, and outlet (5) is located at the middle part of AB arch groove.The external diameter of external rotor (2) equal cylinder body (1) internal diameter and with cylinder body (1) arranged concentric in cylinder body (1), with reference to Figure 13,14, when the end cap (11) on both sides was connected in the two ends of cylinder body (1), the interior circle of external rotor (2) matched with the axle journal (12) of end cap (11).Internal rotor (4) is clipped in the external rotor (2).Line shaft (8) passes internal rotor (4), tightens together by key (7) and internal rotor (4), and relative with cylinder body (1) eccentric, passes the axis hole of both sides end cap (11).In the spill AB arch groove that is partially submerged into cylinder body (1) inwall middle part of internal rotor (4), match, seal up AB arch groove and outlet (5) with the AB arch groove.Internal rotor (4) is as Fig. 6, and shown in 7,8, the cross section is a circle that a sector notch is arranged, and fan-shaped chord length is less than the chord length of AB arch groove.Fan-shaped summit is on the center of circle.The both sides of internal rotor (4) have chute (9).

With reference to Fig. 9, the side direction of 10 external rotors (2) has a small sircle hole (13) axially to connect external rotor (2), and the diameter of small sircle hole (13) equals to seal the diameter of guiding tile (3).The diameter of small sircle hole (13) deduct less than the external diameter of external rotor (2) its internal diameter difference 1/2nd.The A-A section of external rotor (2) is an asymmetrical cross section, as shown in figure 10.Establishing one earlier is the summit with O1, chord length equals sector notch chord length fan-shaped of internal rotor (4), this fan-shaped one side is the F face, another side is parallel with the horizontal center line of external rotor (2) and cross the center of circle of small sircle hole (13), one semicircle of small sircle hole cuts out a semi-circle with it, cuts in the outside of this semi-circle that center of circle angle between the horizontal center line of and small sircle hole (13) obtains after greater than 30 ° H face.With reference to Fig. 5, when the notch alignment AB arch groove of internal rotor (4), the D face of internal rotor (4) should overlap with the F face of external rotor (2).At this moment, V2=0, V3=0.

With reference to Figure 11,12, sealing guiding tile (3) is installed in the side direction small sircle hole (13) of external rotor (2), can freely turn round around its center of circle.Internal rotor (4) is clipped in the external rotor (2), and interior can the doing of chute (9) that the feather key (10) on the sealing guiding tile (3) embeds on the internal rotor (4) reciprocatingly slides, and simultaneously internal rotor (4) and external rotor (2) is linked together.Lubricant oil injects the SPACE V 5 between external rotor (2) and the end cap (11), uses for mechanical lubrication in the V6.

During compressor operating, internal rotor (4) rotates under the effect of line shaft (8) along clockwise direction, and internal rotor (4) promotes external rotor (2) by sealing guiding tile (3) and synchronously rotates.As shown in Figure 1.Because internal rotor (4) is to be relative eccentric the arrangement with cylinder body (1), and the external diameter of internal rotor (4) is again less than the round internal diameter of cylinder body (1) inwall, therefore, formed a crescent-shaped space between internal rotor (4) and cylinder body (1) inwall, this space is exactly the swept volume of compressor.Internal rotor (4) promotes external rotor (2) when clockwise rotating by sealing guiding tile (3), external rotor (2) is divided into size at the V1 that constantly changes with crescent-shaped space, V2 two-part, again because internal rotor (4) is to be relative eccentric the arrangement with external rotor (2), so, between internal rotor (4) and external rotor (2), also formed a size at the V3 that constantly changes.And V2 communicates with V3.After the F face of external rotor (2) turned over import (6), V (1) beginning increased and forms negative pressure gradually, and gas medium sucks V1 from import (6).V2 is also diminishing gradually simultaneously, and V3 becomes greatly gradually, and the gas medium in the V2 partly has been introduced into V3, along with the continuation rotation of internal rotor (4) with external rotor (2), V3 begins to diminish gradually after reaching maximum, and at this moment, the most of gas medium in the V2 has been introduced among the V3, subsequently, compression process begins, and the space of V2 is more and more littler, until disappearance, gas medium all is pressed in the V3, and V3 is also more and more littler.When the D face of internal rotor (4) goes to outlet (5) when locating, compressed gas medium begins to discharge from outlet (5).As shown in Figure 4.When internal rotor (4) continued to rotate to sector notch aligning AB arch groove, the D face of internal rotor (4) overlapped with the F face of external rotor (2), V3 vanishing this moment, and the compressed gas medium in the V3 is all discharged.Then begin to carry out scavenging process, the C face of internal rotor (4) scans out the remaining major part that is compressed gas medium in the V4 from outlet (5), turn over the final position of outlet (5) until the C face of internal rotor (4), exhaust process finishes, and the external arc of internal rotor (4) will export (5) once more and seal up.When the C face of internal rotor (4) turned round import (6) once more, new intake process had begun again.

During compressor operating, sealing guiding tile (3) is on the one hand done reciprocal parallel motion with respect to the C face of internal rotor (4) along the chute (9) of internal rotor (4), does corresponding reciprocal rotation on the other hand in the side direction small sircle hole (13) of external rotor (2) around the center of circle of oneself.

Claims

1. rotary compressor, it comprises cylinder body (1), end cap (11), line shaft (8), key (7), outlet (5), import (6) is formed, and it is characterized in that:

A. circle tube cylinder (1) is provided with import (6) and outlet (5), and the middle part of its inwall circle is cut mutually by an eccentric circle, and outlet (5) is located at cuts the place mutually,

B. in the cylinder body (1) external rotor (2) is housed, internal rotor (4), sealing guiding tile (3),

C. external rotor (2) is a hollow disc, sealing guiding tile (3) is housed in the side direction small sircle hole (13), internal rotor (4) is a disk that a sector notch is arranged, be clipped in the external rotor (2), solid section in the middle of the external rotor (2) stretches into the sector notch of internal rotor (4), and line shaft (8) passes the axis hole and the relative off-centre with cylinder body (1) of internal rotor (4).

2. compressor according to claim 1 is characterized in that the middle part of inwall circle of cylinder body (1) is relative with cylinder body eccentric by one, and the circle that diameter equals the external diameter of internal rotor (4) cuts mutually, the arch groove of a spill of formation.

3. compressor according to claim 1 and 2 is characterized in that outlet (5) is located at the middle part of the spill arch groove on cylinder body (1) the inwall circle.

4. compressor according to claim 1 is characterized in that the round arranged concentric of external rotor (2) and cylinder body in cylinder body (1), plays compression and seal action.

5. compressor according to claim 1 and 2, it is characterized in that internal rotor (4) is clipped in the external rotor (2), its center of circle is relative with the center of circle of cylinder body (1) eccentric, embed in the spill arch groove on cylinder body (1) inwall, seal arch groove and outlet (5) and promote external rotor (2) rotation compression by sealing guiding tile (3).

6. compressor according to claim 4, it is characterized in that sealing in the side direction small sircle hole (13) that guiding tile (3) axially is installed in external rotor (2), can freely turn round around its center of circle, in the chute (9) on its feather key (10) embedding internal rotor (4), can reciprocatingly slide along chute (9), and external rotor (2) and internal rotor (4) are linked together.

7. compressor according to claim 4 is characterized in that internal rotor (4) is a disk that a sector notch is arranged, and its fan-shaped chord length is less than the chord length of the spill arch groove on cylinder body (1) the inwall circle.

8. according to claim 4 or 7 described compressors, be characterised in that external rotor (2) is a hollow disc, its cross section be the outside on an one side have one and the horizontal center line of side direction small sircle hole (13) between center of circle angle greater than 30 ° H face with by the asymmetrical cross section of half semi-circle that cuts out of side direction small sircle hole (13).This cross section is combined into one fan-shaped with the cross section of sealing guiding tile (3), and this is fan-shaped just in time to match with the sector notch of internal rotor (4).