CN109595161B

CN109595161B - Compressor

Info

Publication number: CN109595161B
Application number: CN201710939546.7A
Authority: CN
Inventors: 黎法运; 杨开成; 虞阳波
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2024-04-02
Anticipated expiration: 2037-09-30
Also published as: CN109595161A

Abstract

The invention discloses a compressor, comprising: the shell is provided with an exhaust port and an air suction port, a partition plate is arranged in the shell to define a first cavity and a second cavity, the air suction port is communicated with the first cavity, the exhaust port is communicated with the second cavity, and an oil pool is arranged in the second cavity; the compression mechanism part is arranged in the second cavity, the compression mechanism part comprises a crankshaft, a cylinder and a sealing cover component, the sealing cover component is sleeved on the crankshaft and arranged on the end face of the cylinder to seal the cylinder cavity, the sealing cover component comprises a main bearing, a part of the main bearing is positioned in the installation through hole, an oil inlet channel is arranged on the sealing cover component, the inlet end of the oil inlet channel is communicated with the oil pool, the oil inlet channel is provided with a first oil outlet and a second oil outlet, the first oil outlet is arranged on the inner peripheral wall of the sealing cover component, and the second oil outlet is communicated with the sliding vane groove. According to the compressor provided by the invention, the problems of oil supply and sealing of the sliding vane are solved, and the tightness and reliability between the sliding vane and the sliding vane groove are improved.

Description

Compressor

Technical Field

The invention relates to the field of refrigeration, in particular to a compressor.

Background

The rotary compressor in the prior art generally realizes the flow of the frozen oil from the tail end of the crankshaft through the rotation of the crankshaft and the stirring of the oil feeding blades, lubricates and seals various gaps and friction pairs, and because the oil supply pressure difference is smaller, the oil supply structure can cause the problem of insufficient oil supply at low rotation speed and low oil level, and the vertical compressor can not directly supply oil to the sliding vane to cause the leakage of the gap between the groove and the abrasion of the sliding vane and the sliding vane groove, so that the running oil level of the compressor is required to be higher. The horizontal compressor requires that the sliding vane groove be downward and close to one side of the oil pool, and when the oil level is lowered, the problems that the freezing oil in the oil pool cannot seal and lubricate the sliding vane gap still exist, so that leakage and insufficient oil supply abrasion of the friction pair are caused.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a compressor, solves the problems of oil supply and sealing of the sliding vane, and improves the sealing property and reliability between the sliding vane and the sliding vane groove.

According to an embodiment of the present invention, a compressor includes: the oil tank comprises a shell, wherein an air outlet and an air suction port are formed in the shell, a partition plate is arranged in the shell to define a first cavity and a second cavity, the air suction port is communicated with the first cavity, the air outlet is communicated with the second cavity, a mounting through hole is formed in the partition plate, and an oil tank is arranged in the second cavity; the motor is arranged in the first cavity; the compression mechanism part is arranged in the second cavity, the compression mechanism part comprises a crankshaft, a cylinder and a cover part, a cylinder cavity and a slide sheet groove are formed in the cylinder, a slide sheet capable of moving back and forth is arranged in the slide sheet groove, the crankshaft penetrates through the cylinder, the cover assembly and the mounting through hole and stretches into the first cavity to be connected with the motor, the cover assembly is sleeved on the crankshaft and arranged on the end face of the cylinder to cover the cylinder cavity, the cover assembly comprises a main bearing, a part of the main bearing is positioned in the mounting through hole, an oil inlet channel is formed in the cover assembly, the inlet end of the oil inlet channel is communicated with the oil pool, the oil inlet channel is provided with a first oil outlet and a second oil outlet, the first oil outlet is arranged on the inner peripheral wall of the cover assembly, and the second oil outlet is communicated with the slide sheet groove.

According to the compressor provided by the embodiment of the invention, the oil inlet channel is arranged in the sealing cover assembly, so that the lubricating oil in the oil pool enters the oil inlet channel by utilizing the action of pressure difference to lubricate the moving parts such as the crankshaft, the piston, the sliding vane and the like, so that an effective lubricating effect can be achieved on the sliding vane, the abrasion between the sliding vane and the sliding vane groove is reduced, and meanwhile, the sealing effect between the sliding vane groove and the sliding vane is ensured because the lubricating oil is always positioned in the sliding vane and the sliding vane groove, thereby solving the problems of oil supply and sealing of the sliding vane and improving the sealing property and reliability between the sliding vane and the sliding vane groove.

In some embodiments of the present invention, communication holes are provided on opposite side walls of the sliding vane groove, and each communication hole is opposite to the second oil outlet and is communicated with the second oil outlet.

In some embodiments of the present invention, the pore diameter of each of the communication holes ranges from 1mm to 5mm.

In some embodiments of the present invention, the radial distance between each of the communication holes and the inner peripheral wall of the cylinder ranges from 1mm to Amm, where a=l-2 e, L is the length of the slide, and e is the eccentric amount of the crankshaft.

Further, a radial distance between each communication hole and an inner peripheral wall of the cylinder is not less than 2mm, and a radial distance between each communication hole and a trailing end of the vane groove is not less than 2mm.

Optionally, the second oil outlet is formed in an oblong shape.

In some embodiments of the invention, the oil inlet passage extends in a direction that is at an angle to the radial direction of the cover assembly.

In some embodiments of the present invention, the oil inlet channel is located within a range defined by a first plane and a second plane, the first plane and the second plane are located at two sides of the sliding vane groove, and an included angle between the first plane and the second plane and a central plane of the sliding vane groove is 45 degrees, wherein the first plane, the second plane and the central plane all pass through the center of the cylinder.

In some embodiments of the present invention, the compression mechanism portion includes a plurality of cylinders, and the cover assembly includes a middle partition plate disposed between two adjacent cylinders, the oil inlet passage being provided in the middle partition plate.

In some embodiments of the invention, the main bearing is provided with the oil feed passage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a sectional view of a compressor according to an embodiment of the present invention;

fig. 2 is a schematic view of a compression mechanism part of a compressor according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of the cooperation of a middle baffle and two cylinders according to an embodiment of the present invention;

FIG. 4 is a mating perspective view of the intermediate deck and two cylinders shown in FIG. 3;

FIG. 5 is a schematic view of a midplane according to some embodiments of the invention;

FIG. 6 is a cross-sectional view of the midplane shown in FIG. 5;

FIG. 7 is a schematic view of a midplane according to other embodiments of the invention;

FIG. 8 is a cross-sectional view of the midplane shown in FIG. 7;

FIG. 9 is a schematic view of a cylinder with a slide and piston according to an embodiment of the invention;

FIG. 10 is an enlarged view of portion A of FIG. 9;

fig. 11 is a cross-sectional view of a main bearing according to an embodiment of the invention.

Reference numerals:

a compressor 100,

A housing 1, a first chamber 10, a second chamber 11,

A partition plate 2, an oil pool 3,

A motor 4, a stator 40, a rotor 41,

The compression mechanism 5, the crankshaft 50, the cylinder 51, the vane groove 510, the vane 52, the main bearing 53, the oil inlet passage 54, the first oil outlet 540, the second oil outlet 541, the communication hole 55, and the partition 56.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

A compressor 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 11, wherein the compressor 100 may be a single cylinder compressor or a multi-cylinder compressor.

As shown in fig. 1 to 11, a compressor 100 according to an embodiment of the present invention includes: the oil tank comprises a shell 1, a motor 4 and a compression mechanism part 5, wherein an exhaust port and an air suction port are formed in the shell 1, a partition plate 2 is arranged in the shell 1 to define a first chamber 10 and a second chamber 11, the air suction port is communicated with the first chamber 10, the exhaust port is communicated with the second chamber 11, an installation through hole is formed in the partition plate 2, and an oil tank 3 is arranged in the second chamber 11. It can be seen that the housing 1 defines two first chambers 10 and second chambers 11 of different pressures by the partition plate 2, the pressure of the first chambers 10 is smaller than the pressure of the second chambers 11, and the oil pool 3 is located in the second chambers 11 of high pressure. Specifically, the housing 1 may include two sub-housings, between which the partition plate 2 is sandwiched, and the partition plate 2 and the two sub-housings are fixedly connected by bolts.

The motor 4 is provided in the first chamber 10, the motor 4 comprising a stator 40 and a rotor 41. The compression mechanism 5 is provided in the second chamber 11, the compression mechanism 5 includes a crankshaft 50, a cylinder 51 and a cover member, the cylinder 51 is provided with a cylinder chamber and a slide groove 510, the slide groove 510 is provided with a slide 52 which reciprocates, the crankshaft 50 passes through the cylinder 51, the cover member and the mounting through hole and extends into the first chamber 10 to be connected with the motor 4, specifically, an eccentric portion of the crankshaft 50 is provided in the cylinder chamber, a piston jacket is provided on the eccentric portion to eccentrically rotate in the cylinder chamber, the crankshaft 50 passes through the mounting through hole from the second chamber 11 and extends into the first chamber 10, and the crankshaft 50 is connected with the rotor 41 to be driven to rotate by the rotor 41.

A capping assembly is sleeved on the crankshaft 50 and provided on an end face of the cylinder 51 to cap the cylinder chamber, the capping assembly including a main bearing 53. It will be appreciated that the cylinder chamber is provided on both sides with a cap assembly to define a closed compression chamber and suction chamber, the cap assembly comprising a primary bearing 53 and a secondary bearing on both sides of the cylinder 51 when the compressor 100 is a single cylinder compressor. When the compressor 100 is a multi-cylinder compressor, the cover assembly includes a main bearing 53, a sub-bearing, and a middle partition 56, with the middle partition 56 being disposed between two adjacent cylinders 51.

A part of the main bearing 53 is located in the mounting through hole, wherein the cover assembly is provided with an oil inlet passage 54, the inlet end of the oil inlet passage 54 is communicated with the oil sump 3, the oil inlet passage 54 is provided with a first oil outlet 540 and a second oil outlet 541, the first oil outlet 540 is arranged on the inner peripheral wall of the cover assembly, and the second oil outlet 541 is communicated with the slide sheet groove 510. That is, a part of the lubricating oil in the oil feed passage 54 may flow to the inner peripheral wall of the cap assembly through the first oil outlet 540, and another part of the lubricating oil in the oil feed passage 54 may flow to the vane groove 510 through the second oil outlet 541, which should be disposed opposite to the gap between the vane 52 and the vane groove 510. Alternatively, the second oil outlet 541 is formed in an oblong shape, but it is understood that the second oil outlet 541 may be formed in other shapes such as a circular hole.

Specifically, since the first chamber 10 communicates with the intake port and the second chamber 11 communicates with the exhaust port, the first chamber 10 is in a low pressure environment, the second chamber 11 is in a high pressure environment, and the oil pool 3 is also in a high pressure environment, there is a pressure difference between both sides of the mounting through hole of the partition plate 2, there is a pressure difference between both sides of the main bearing 53 because the crankshaft 50 passes through the mounting through hole and a part of the main bearing 53 is also located in the mounting through hole, and there is a pressure difference between a part of the crankshaft 50 located in the first chamber 10 and a part located in the second chamber 11. It will be appreciated that under the influence of the pressure differential, the lubricating oil in the high pressure environment will circulate towards the low pressure environment. It should be noted that the "high pressure" and "low pressure" mentioned in the present invention are not specific to specific pressure values, but are merely meant to indicate that the pressures between the two chambers are different.

Since the inlet end of the oil feed passage 54 communicates with the oil sump 3 and the first oil outlet 540 is provided on the inner peripheral wall of the cap assembly, the oil feed passage 54 communicates with the first chamber 10 and the second chamber 11, and under the effect of the pressure difference, the lubricating oil in the oil sump 3 may enter the oil feed passage 54 through the inlet end of the oil feed passage 54, and a portion of the lubricating oil entering the oil feed passage 54 may flow to the inner peripheral wall of the cap assembly through the first oil outlet 540 to lubricate the crankshaft 50, the cap assembly, and the piston.

Another part of the lubricating oil in the oil feed passage 54 may flow into the vane groove 510 through the second oil outlet 541 to lubricate the reciprocating vane 52, whereby the moving parts in the compression mechanism part 5 may be effectively lubricated by providing the oil feed passage 54.

In some embodiments of the present invention, the compression mechanism portion 5 includes a plurality of cylinders 51, and the cap assembly includes a middle partition 56 provided between adjacent two of the cylinders 51, with an oil inlet passage 54 provided in the middle partition 56. Preferably, the main bearing 53 is provided with an oil inlet passage 54. In the specific example shown in fig. 1-2, the compression mechanism part 5 includes two cylinders 51, and the middle partition plate 56 and the main bearing 53 are each provided with the oil inlet passage 54, so that the lubrication effect of the compression mechanism part 5 is ensured, and it is understood that the shape and arrangement position of the oil inlet passage 54 on the middle partition plate 56 may be the same as or different from those of the oil inlet passage 54 on the main bearing 53.

According to the compressor 100 of the embodiment of the invention, the oil inlet channel 54 is arranged in the sealing cover assembly, so that the lubricating oil in the oil sump 3 enters the oil inlet channel 54 by utilizing the action of pressure difference to lubricate the crankshaft 50, the piston, the sliding vane 52 and other moving parts, the sliding vane 52 can be effectively lubricated, abrasion between the sliding vane 52 and the sliding vane groove 510 is reduced, and meanwhile, as the lubricating oil is always positioned in the sliding vane 52 and the sliding vane groove 510, the sealing effect between the sliding vane groove 510 and the sliding vane 52 is ensured, thereby solving the oil supply and sealing problems of the sliding vane 52 and improving the sealing property and reliability between the sliding vane 52 and the sliding vane groove 510.

In some embodiments of the present invention, communication holes 55 are provided on opposite sidewalls of the slide groove 510, and each communication hole 55 is disposed opposite to the second oil outlet 541 so as to communicate with the second oil outlet 541. Thus, by providing the communication hole 55, the amount of lubrication oil entering the slide groove 510 can be further ensured, and the sealing property and reliability between the slide 52 and the slide groove 510 can be further improved. Wherein the communication hole 55 may be a semicircular hole or a trapezoidal hole, and the area of the communication hole is between 0.5 and 10 square millimeters. Alternatively, the aperture of each communication hole 55 may have a value ranging from 1mm to 5mm.

In some embodiments of the present invention, the radial distance between each communication hole 55 and the inner peripheral wall of the cylinder 51 is in the range of 1mm-Amm, where a=l-2 e, L being the length of the slide sheet 52, e being the eccentric amount of the crankshaft 50. When the slide 52 is positioned in the slide groove 510 by the spring, the length of the slide 52 is the distance between the tail end of the slide 52 contacting the spring and the front end of the slide 52 contacting the piston. So that the high-pressure lubrication oil introduced into the vane groove 510 can be prevented from leaking into the cylinder chamber of the cylinder 51.

Preferably, the radial distance between each communication hole 55 and the inner peripheral wall of the cylinder 51 is not less than 2mm, and the radial distance between each communication hole 55 and the trailing end of the vane groove 510 is not less than 2mm. So that high-pressure lubrication oil introduced into the vane groove 510 can be prevented from leaking to the cylinder chamber and the rear of the vane groove 510. The tail of the vane groove 510 refers to the end of the vane groove 510 at the end away from the center of the cylinder 51.

In some embodiments of the present invention, the oil feed passage 54 extends in a direction that is at an angle to the radial direction of the closure assembly. It will of course be appreciated that the direction of extension of the oil feed passage 54 may also be parallel to the radial direction of the closure assembly. Further, as shown in fig. 8, the oil feed passage 54 may extend obliquely toward the end face of the cover assembly where the second oil outlet 541 is provided, in a direction from the inlet end to the first oil outlet 540. In some embodiments of the present invention, the second oil outlet 541 is formed as a groove extending outwardly from an opposite side wall of the oil inlet passage 54. In other embodiments of the present invention, the second oil outlet 541 is formed as a groove extending outwardly from one of the side walls of the oil feed passage 54.

In some embodiments of the present invention, the oil inlet passage 54 is located within a range defined by a first plane and a second plane, which are located at both sides of the vane groove 510, and an included angle between the first plane and the second plane and a center plane of the vane groove 510 is 45 °, wherein the first plane, the second plane, and the center plane pass through the center of the cylinder 51. That is, the oil inlet passage 54 is disposed within a range defined by an included angle of plus or minus 45 degrees with the center plane of the vane groove 510. Thereby ensuring structural strength of the cap assembly and ensuring that lubricating oil can be delivered into the slide groove 510.

Other components, such as electrical control principles, etc., and operation of the compressor 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A compressor, comprising:

the oil tank comprises a shell, wherein an air outlet and an air suction port are formed in the shell, a partition plate is arranged in the shell to define a first cavity and a second cavity, the air suction port is communicated with the first cavity, the air outlet is communicated with the second cavity, a mounting through hole is formed in the partition plate, and an oil tank is arranged in the second cavity;

the motor is arranged in the first cavity;

the compression mechanism part is arranged in the second cavity and comprises a crankshaft, a cylinder and a cover assembly, a cylinder cavity and a sliding vane groove are formed in the cylinder, a sliding vane which moves back and forth is arranged in the sliding vane groove, the crankshaft penetrates through the cylinder, the cover assembly and the mounting through hole and stretches into the first cavity to be connected with the motor, the cover assembly is sleeved on the crankshaft and is arranged on the end face of the cylinder to cover the cylinder cavity, the cover assembly comprises a main bearing, a part of the main bearing is positioned in the mounting through hole, an oil inlet channel is formed in the cover assembly, the inlet end of the oil inlet channel is communicated with the oil pool, the oil inlet channel is provided with a first oil outlet and a second oil outlet, the first oil outlet is formed in the inner peripheral wall of the cover assembly, and the second oil outlet is communicated with the sliding vane groove;

and the opposite side walls of the sliding vane groove are respectively provided with a communication hole, and each communication hole is opposite to the second oil outlet and communicated with the second oil outlet.

2. The compressor according to claim 1, wherein the aperture of each communication hole has a value ranging from 1mm to 5mm.

3. The compressor according to claim 1, wherein a radial distance between each of the communication holes and an inner peripheral wall of the cylinder ranges from 1mm to Amm, wherein a = L-2e, L is a length of the slide, and e is an eccentric amount of the crankshaft.

4. A compressor according to claim 3, wherein a radial distance between each of the communication holes and an inner peripheral wall of the cylinder is not less than 2mm, and a radial distance between each of the communication holes and a trailing end of the vane groove is not less than 2mm.

5. The compressor of claim 1, wherein the second oil outlet is formed in an oblong shape.

6. The compressor of claim 1, wherein the oil feed passage extends in a direction that is at an angle to a radial direction of the cover assembly.

7. The compressor of claim 1, wherein the oil inlet passage is located within a range defined by a first plane and a second plane, the first plane and the second plane are located on both sides of the vane groove, and an included angle between the first plane and the second plane and a center plane of the vane groove is 45 °, wherein the first plane, the second plane, and the center plane all pass through a center of the cylinder.

8. The compressor of claim 1, wherein the compression mechanism portion includes a plurality of cylinders, and the cover assembly includes a middle partition plate provided between adjacent two of the cylinders, the oil inlet passage being provided in the middle partition plate.

9. A compressor according to any one of claims 1 to 8, wherein the main bearing is provided with the oil inlet passage.