WO2018018880A1

WO2018018880A1 - Rotary cylinder piston compressor pump and compressor using same

Info

Publication number: WO2018018880A1
Application number: PCT/CN2017/073923
Authority: WO
Inventors: 黄辉; 胡余生; 邓丽颖; 杜忠诚; 徐嘉
Original assignee: 珠海格力节能环保制冷技术研究中心有限公司
Priority date: 2016-07-29
Filing date: 2017-02-17
Publication date: 2018-02-01
Also published as: JP2019519724A; CN106015008B; JP6772301B2; CN106015008A; US20190316586A1

Abstract

A rotary cylinder piston compressor pump, comprising a rotating shaft (2), a piston (3), and a cylinder (4). A rotating shaft hole (21) is provided in the rotating shaft (2); an oil guiding channel communicated with the rotating shaft hole (21) is provided in the cylinder (4); a recess (45) is formed in the inner end face of the cylinder (4); an oil path which is sealed relative to a compression cavity of the cylinder (4) is formed between the recess (45) and the piston (3); the oil path is communicated with an oil path between the piston (3) and the rotating shaft (2) and is communicated with the oil guiding channel by means of an oil returning channel. Also provided is a compressor comprising the compressor pump. By providing the recess and the oil returning channel, the oil discharging resistance of an oil hole in the side surface of the rotating shaft is reduced, the oil discharging quantity of the oil hole of the rotating shaft is increased, and therefore, the problem of abnormal abrasion caused by insufficient lubrication between the side surface of the rotating shaft and the piston under a heavy working condition is effectively resolved.

Description

Pump body of rotary cylinder piston compressor and compressor using same

This application claims the priority of the Chinese Patent Application filed on July 29, 2016, the Chinese Patent Application No. 201610614674.X, the invention titled "a rotary cylinder piston compressor pump body and a compressor using the same" The entire contents of this application are incorporated herein by reference.

Technical field

The invention relates to the technical field of compressors, in particular to a pump body of a rotary piston compressor and a compressor using the same.

Background technique

The rotary cylinder piston compressor belongs to a new type of refrigeration piston compressor, which essentially adopts a cross slide structure principle. Referring to Fig. 10, O1 is the center of the rotating shaft, O2 is the center of the cylinder, e is the center of the circle (i.e., the amount of eccentricity of the compressor), and the square is the center of mass of the piston. When the rotating shaft rotates, the piston is driven to move in a circular motion, and the distance of the piston with respect to the center of the cylinder is in the range of 0 to e. The rotating shaft is eccentrically assembled with the cylinder, and the rotating shaft drives the cylinder to rotate through the piston. Due to the eccentric relationship between the rotating shaft and the cylinder, the rotating shaft and the cylinder rotate around their respective axes during operation, and the piston reciprocates relative to the cylinder to achieve gas compression.

Specifically, the rotating shaft of the rotary piston compressor is eccentrically assembled with the cylinder, and the rotating shaft drives the cylinder to rotate through the piston, and pumps the oil through the short shaft hole in the short shaft of the cylinder to the rotating shaft hole in the cylinder rotating shaft. Due to the eccentric relationship between the rotating shaft and the cylinder, the rotating shaft and the cylinder rotate around the respective axes during operation. On the one hand, the lower end surface of the rotating shaft is in contact with the end surface of the cylinder, thereby ensuring the oil supply of the rotating shaft, but the oil groove of the oil groove on the side of the rotating shaft The unfavorable influence is not conducive to the lubrication between the rotating shaft and the piston moving pair under heavy working conditions. On the other hand, the area where the inner hole of the rotating shaft intersects with the inner hole of the cylinder rotating shaft has a great influence on the oil supply of the rotating shaft.

In view of the above problems, there is a need for a rotary piston compressor pump body and a compressor using the same that can solve the problem of the circulation resistance of the oil groove oil passage on the side of the rotating shaft existing in the prior art.

Summary of the invention

The object of the present invention is to provide a rotary cylinder piston compressor pump body, which can solve the problem of large circulation resistance of the oil groove oil passage on the side of the rotating shaft existing in the prior art.

Another object of the present invention is to provide a compressor that employs a rotary cylinder piston compressor pump body as described above.

To this end, the present invention employs the following technical solutions:

A rotary cylinder piston compressor pump body includes a rotating shaft, a piston and a cylinder, wherein a rotating shaft hole is disposed in the rotating shaft, and an oil guiding passage communicating with the rotating shaft hole is disposed in the cylinder, wherein the cylinder is provided The end surface is provided with a sinking groove, and the oil groove is formed between the sinking groove and the piston, and the oil circuit is connected with the oil passage between the piston and the rotating shaft, and is connected to the oil guiding passage through the oil return passage. .

As a preferred embodiment of the above-described rotary piston compressor pump body, the oil return passage includes a cylinder oil hole provided in the cylinder, and the cylinder oil hole penetrates the groove bottom of the sinking groove and the outer surface of the cylinder.

As a preferred embodiment of the above-mentioned rotary cylinder piston compressor pump body, the oil return passage further includes a cylinder short shaft hole disposed on the short shaft of the cylinder, and the cylinder short shaft hole communicates with the cylinder oil hole. The cylinder short shaft hole is disposed through the inner surface and the outer surface of the cylinder short shaft.

As a preferred embodiment of the above-described rotary piston compressor pump body, the area where the shaft hole and the oil guiding passage intersect is not less than 20% of the cross-sectional area of the shaft hole.

As a preferred embodiment of the above-described rotary piston compressor pump body, the cylinder includes a cylinder short shaft, and the oil passage is a cylinder bore provided in a short shaft of the cylinder.

As a preferred embodiment of the pump body of the rotary cylinder piston compressor, the oil guiding passage is an oil guiding tube;

The cylinder includes a cylinder short shaft, and the cylinder short shaft is provided with a through hole structure for providing a movement space for the movement of the oil guiding tube, and the oil guiding tube is disposed in the through hole structure;

One end of the oil guiding tube is mounted on the rotating shaft, and an outlet end of the oil guiding tube and the rotating shaft hole Oppositely, and the oil guiding piece is disposed in the oil guiding pipe.

As a preferred embodiment of the above-described rotary piston compressor pump body, a shaft hole oil guide piece is disposed in the shaft hole.

As a preferred embodiment of the above-described rotary piston compressor pump body, a piston oil hole penetrating the inner surface and the outer surface of the piston is disposed on a side wall of the piston.

As a preferred embodiment of the above-described rotary piston compressor pump body, the inlet end of the shaft hole is a tapered structure that is flared outward.

A compressor comprising a rotary cylinder piston compressor pump body as described above.

The invention has the beneficial effects that the oil discharge resistance of the oil hole on the side of the rotating shaft is effectively reduced by the setting of the sinking groove and the oil return passage, and the oil output of the oil hole of the rotating shaft is increased, thereby effectively solving the side of the rotating shaft under heavy working conditions. Abnormal wear problems with the piston due to insufficient lubrication.

DRAWINGS

1 is a schematic exploded view of a pump body of a rotary cylinder piston compressor according to a first embodiment of the present invention;

2 is a schematic structural view of a pump body of a rotary cylinder piston compressor according to a first embodiment of the present invention;

Figure 3 is a partial enlarged view of "where I" of Figure 2;

4 is a schematic structural view of a rotating shaft according to a first embodiment of the present invention;

5 is a schematic structural view of a cylinder provided by a specific embodiment 1 of the present invention;

6 is a schematic exploded view of a pump body of a rotary cylinder piston compressor according to a second embodiment of the present invention;

7 is a schematic structural view of a pump body of a rotary cylinder piston compressor according to a second embodiment of the present invention;

8 is a schematic structural view of a rotating shaft according to a second embodiment of the present invention;

9 is a schematic structural view of a cylinder provided by a second embodiment of the present invention;

Figure 10 is a schematic diagram of the cross slider structure.

among them:

1: upper flange; 2: shaft; 3: piston; 4: cylinder; 5: cylinder sleeve; 6: lower flange; 7: oil guide; 8: oil guide.

21: shaft hole; 22: shaft hole oil guide;

31: piston oil hole;

41: piston hole; 42: cylinder short shaft; 43: cylinder hole; 44: cylinder hole oil guide; 45: sinking groove; 46: cylinder oil hole; 47: cylinder short shaft hole; 48: through hole structure.

detailed description

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

As shown in FIG. 1 to FIG. 5, the embodiment provides a rotary cylinder piston compressor pump body, and the rotary cylinder piston compressor pump body includes an upper flange 1, a rotating shaft 2, a piston 3, a cylinder 4, and a cylinder liner 5. And a lower flange 6, wherein the piston 3 is mounted in the piston bore 41 of the cylinder 4, the cylinder short shaft 42 of the cylinder 4 is mounted on the lower flange 6, and the cylinder liner 5 is mounted coaxially with the cylinder 4, and the lower flange 6 is fixed At the lower end of the cylinder liner 5, the piston bearing surface of the rotating shaft 2 is fitted with the piston plane, the upper flange 1 fixes the upper half of the rotating shaft 2, and the upper flange 1 is fixed to the upper end of the cylinder liner 5 by screws.

Specifically, a shaft hole 21 is disposed in the rotating shaft 2, and an oil guiding passage communicating with the rotating shaft hole 21 is disposed in the cylinder 4.

Referring to FIG. 2 and FIG. 5, the inner end surface of the cylinder 4 is provided with a sinking groove 45, and between the sinking groove 45 and the piston 3. The oil passage is sealed with respect to the compression chamber of the cylinder 4, and the oil passage communicates with the oil passage between the piston 3 and the rotating shaft 2, and communicates with the oil guiding passage through the oil return passage. Specifically, referring to FIG. 5, the sinker 45 is an annular oil groove disposed around the cylinder stub shaft 42, and the setting of the sinker 45 does not affect the airtightness between the cylinder stub shaft 42 and the shaft 2.

Through the setting of the sinking groove 45 and the oil return passage, the oil resistance of the oil hole on the side of the rotating shaft 2 is effectively reduced, and the oil output of the oil hole of the rotating shaft 2 is increased, thereby effectively solving the side of the rotating shaft 2 and the piston 3 under heavy working conditions. Abnormal wear problems due to insufficient lubrication.

The oil return passage includes a cylinder oil hole 46 provided in the cylinder 4, and the cylinder oil hole 46 penetrates the groove bottom of the sinker 45 and the outer surface of the cylinder 4.

The oil return passage further includes a cylinder short shaft hole 47 provided in the cylinder short shaft 42, the cylinder short shaft hole 47 communicating with the cylinder oil hole 46, and the cylinder short shaft hole 47 being disposed through the inner surface and the outer surface of the cylinder short shaft 42.

Through the arrangement of the sinking groove 45, the cylinder oil hole 46 and the cylinder short shaft hole 47, the oil resistance of the oil hole on the side of the rotating shaft 2 is further reduced, and the oil output of the oil hole of the rotating shaft 2 is increased, thereby effectively solving the heavy working condition. Abnormal wear problems between the side of the lower shaft 2 and the piston 3 due to insufficient lubrication.

The area where the shaft hole 21 and the oil guiding passage intersect is not less than 20% of the cross-sectional area of the shaft hole 21. By increasing the area where the shaft hole 21 and the oil passage intersect, the amount of oil of the shaft 2 can be increased.

The specific means for increasing the area where the shaft hole 21 and the oil guiding passage intersect is to increase the diameter of the shaft hole 21 of the rotating shaft 2. Preferably, the ratio of the inner diameter of the shaft hole 21 to the outer diameter of the shaft 2 ranges from 0.3 to 0.6. Further preferably, the ratio of the inner diameter of the shaft hole 21 to the outer diameter of the shaft 2 is 0.35 mm, 0.4 or 0.5. In the present embodiment, the inner diameter of the shaft hole 21 is 6 mm, and the outer diameter of the shaft 2 is 16.5 mm.

Referring to FIG. 2, in the present embodiment, the cylinder 4 includes a cylinder short shaft 42 and the oil guiding passage is disposed at A cylinder bore 43 in the cylinder stub shaft 42. The cylinder bore 43 is provided with a cylinder bore oil guide 44 which rotates synchronously with the cylinder 4 and pumps the oil into the shaft bore 21 by centrifugal force. Preferably, the area of the shaft hole 21 intersecting the cylinder bore 43 is not less than one-third or one-fifth of the cross-sectional area of the shaft hole 21.

Referring to Figs. 1 and 2, in order to further increase the amount of oil to be pumped to the shaft 2, a shaft hole oil guide piece 22 is provided in the shaft hole 21. The shaft hole oil guide piece 22 has the same structure as the conventional cylinder hole oil guide piece 44 provided in the cylinder hole 43, and has a spiral blade type structure.

A piston oil hole 31 penetrating the inner surface and the outer surface of the piston 3 is provided on the side wall of the piston 3. The piston oil hole 31 can lubricate the outer wall surface of the piston 3 and the inner wall surface of the cylinder 4 while reducing the oil loss caused by the reciprocating motion of the rotary shaft 2 in the piston bore.

The inlet end of the shaft hole 21 is a tapered structure that is flared outward. By arranging the end portion of the shaft hole 21 into a tapered structure, the area where the shaft hole 21 and the oil passage are intersected can be effectively increased under the premise of the same hole diameter of the shaft hole 21.

In order to further explain the pump body of the above-mentioned rotary cylinder piston compressor, the present embodiment also provides the working process of the above pump body:

The motor drives the rotating shaft 2 to rotate, and the piston supporting surface of the rotating shaft 2 drives the piston 3 to rotate, but the piston 3 only reciprocates relative to the rotating shaft 2; the non-circular (or circular) side of the piston further drives the cylinder 4 to rotate, at this time, the piston 3 is only reciprocating relative to the cylinder 4, and the reciprocating direction is perpendicular to the reciprocating direction of the piston 3, the rotating shaft 2; during the reciprocating motion, the entire pump body structure completes the process of suction, compression, and exhaust.

Also provided in the present embodiment is a compressor comprising a rotary cylinder piston compressor pump body as described above.

Embodiment 2

As shown in FIG. 6 to FIG. 9, in the present embodiment, another structural form of the oil guiding passage is provided. Referring to FIGS. 6 and 7, the oil guiding passage is the oil guiding tube 7. The cylinder 4 includes a cylinder stub shaft 42 and the cylinder stub shaft 42 is provided with a through hole structure 48 for providing a movement space for the movement of the oil guiding tube 7, and the oil guiding tube 7 is disposed in the through hole structure 48, and one end of the oil guiding tube 7 is installed at On the rotating shaft 2, the outlet end of the oil guiding pipe 7 is opposite to the rotating shaft hole 21, and the oil guiding piece 8 is disposed in the oil guiding pipe 7. The structure of the oil guiding piece is the same as that of the rotating shaft oil guiding piece 22 mentioned in the embodiment.

In order to provide a space for the oil guiding pipe 7, the inner diameter of the cylinder short shaft 42 is larger than the inner diameter of the cylinder short shaft 42 in the first embodiment, and the corresponding inner diameter of the bearing on the corresponding lower flange 6 is also increased. Specifically, the ratio of the inner diameter of the through hole structure 48 to the outer diameter of the short axis 42 of the cylinder ranges from 0.6 to 0.8. Preferably, the ratio of the inner diameter of the through-hole structure 48 to the outer diameter of the short axis 42 of the cylinder is 0.65, 0.7 or 0.75. In the present embodiment, the through hole structure 48 has an inner diameter of 14 mm and the cylinder short shaft 42 has an outer diameter of 20 mm.

One end of the oil guiding tube 7 is inserted into the rotating shaft hole 21, and the end portion of the rotating shaft hole 21 is arranged in a tapered structure. When the oil guiding tube 7 is assembled into the rotating shaft hole 21, the tapered structure can play a guiding role, which is convenient for guiding. Assembly of the oil pipe 7. Referring to Fig. 8, the lower end of the shaft hole 21 is a stepped hole for inserting the oil guiding tube 7. By using the oil guiding pipe 7 as the oil guiding passage, the area where the rotating shaft hole 21 and the oil guiding passage intersect can be made the same as the cross-sectional area of the rotating shaft hole 21, whereby the oil pumping effect of the rotating shaft 2 can be remarkably improved.

It should be noted that, in this embodiment, the structure of the oil guiding passage is the same as that of the first embodiment except that the structural form of the oil guiding passage is different from that of the first embodiment.

The technical principles of the present invention have been described above in connection with specific embodiments. The descriptions are merely illustrative of the principles of the invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can associate other articles of the present invention without paying creative labor. The embodiments are all within the scope of the present invention.

Claims

A rotary cylinder piston compressor pump body includes a rotating shaft (2), a piston (3) and a cylinder (4), wherein a rotating shaft hole (21) is disposed in the rotating shaft (2), and the cylinder (4) is inside An oil guiding passage communicating with the rotating shaft hole (21) is provided, wherein the inner end surface of the cylinder (4) is provided with a sinking groove (45), and the sinking groove (45) and the piston (3) An oil passage is formed which is sealed with respect to the compression chamber of the cylinder (4), and the oil passage communicates with the oil passage between the piston (3) and the rotating shaft (2), and communicates with the oil guiding passage through the oil return passage.
A rotary cylinder piston compressor pump body according to claim 1, wherein said oil return passage includes a cylinder oil hole (46) provided in the cylinder (4), and the cylinder oil hole (46) penetrates the sinking groove. The bottom of the groove of (45) and the outer surface of the cylinder (4).
A rotary cylinder piston compressor pump body according to claim 2, wherein said oil return passage further comprises a cylinder short shaft hole (47) provided on said cylinder short shaft (42), said cylinder being short The shaft hole (47) communicates with a cylinder oil hole (46) which is disposed through an inner surface and an outer surface of the cylinder short shaft (42).
The rotary cylinder piston compressor pump body according to claim 1, wherein an area intersecting the shaft hole (21) and the oil guiding passage is not less than 20% of a cross-sectional area of the shaft hole (21). .
A rotary cylinder piston compressor pump body according to claim 1 or 4, wherein said cylinder (4) includes a cylinder short shaft (42), and said oil guiding passage is disposed in a cylinder short shaft (42) Cylinder bore (43).
The cylinder piston compressor pump body according to claim 1 or 4, wherein the oil guiding passage is an oil guiding tube (7);

The cylinder (4) includes a cylinder short shaft (42), and the cylinder short shaft (42) is provided for guiding oil The movement of the tube (7) provides a through-hole structure (48) for the movement space, the oil guiding tube (7) being disposed within the through-hole structure (48);

One end of the oil guiding tube (7) is mounted on the rotating shaft (2), an outlet end of the oil guiding tube (7) is opposite to the rotating shaft hole (21), and the oil guiding tube (7) is disposed There are oil guides (8).
The cylinder piston compressor pump body according to claim 1, wherein a shaft hole oil guide piece (22) is disposed in the shaft hole (21).
A rotary cylinder piston compressor pump body according to claim 1, wherein a piston oil hole (31) penetrating the inner surface and the outer surface of the piston (3) is provided on a side wall of the piston (3). ).
The cylinder piston compressor pump body according to claim 1, wherein the inlet end of the shaft hole (21) is a tapered structure that is flared outward.
A compressor comprising the rotary cylinder piston compressor pump body according to any one of claims 1-9.