CN111287973B

CN111287973B - Three-cylinder compressor and refrigerating device with same

Info

Publication number: CN111287973B
Application number: CN201811489080.6A
Authority: CN
Inventors: 谭琴; 朱晓涵
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2022-01-18
Anticipated expiration: 2038-12-06
Also published as: CN111287973A

Abstract

The invention discloses a three-cylinder compressor and a refrigerating device with the same. The three-cylinder compressor includes: a motor section; a crankshaft including a first eccentric portion, a second eccentric portion, and a third eccentric portion; a first cylinder, a second cylinder and a third cylinder; the main bearing is arranged on the end face, facing the motor part, of the first cylinder and sleeved on the crankshaft, the auxiliary bearing is arranged between the second cylinder and the third cylinder and sleeved on the crankshaft, the part, matched with the auxiliary bearing, of the crankshaft is an auxiliary shaft, the outer diameter of the auxiliary shaft is D1, the diameter of the third eccentric part is D2, the eccentric amount of the third eccentric part is e, and D1-D2-2e is more than or equal to 0. According to the three-cylinder compressor provided by the embodiment of the invention, the self-aligning installation of the cylinder is convenient, the load of the part of the crankshaft positioned between the main bearing and the auxiliary bearing can be reduced, the deformation of the crankshaft is reduced, the rigidity of the crankshaft is improved, the reliability is improved, the noise is reduced, and the auxiliary bearing is convenient to install.

Description

Three-cylinder compressor and refrigerating device with same

Technical Field

The invention relates to the field of refrigeration, in particular to a three-cylinder compressor and a refrigeration device with the same.

Background

As air conditioning technology has developed, it is desirable for compressors to couple more functions and technologies, such as two-stage compression, three-stage compression, etc. In order to meet more demands, the prior art has a single-cylinder compressor, a two-cylinder compressor and a three-cylinder compressor, the three-cylinder compressor of the related art has the problems of poor reliability and large vibration noise, and meanwhile, the aligning assembly process of the cylinder positioned in the middle is complex, so that the assembly of the compressor is inconvenient.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, the invention provides a three-cylinder compressor, which reduces the deformation of a crankshaft, improves the rigidity of the crankshaft, improves the reliability and reduces the noise.

The invention also provides a refrigerating device with the three-cylinder compressor.

According to the embodiment of the invention, the three-cylinder compressor comprises: the motor part comprises a stator and a rotor in running fit with the stator; the crankshaft comprises a first eccentric part, a second eccentric part and a third eccentric part, and the rotor is matched with the crankshaft to drive the crankshaft to rotate; the crankshaft comprises a first cylinder, a second cylinder and a third cylinder, wherein the first cylinder, the second cylinder and the third cylinder are sequentially distributed along the axial direction of the crankshaft, a middle partition plate is arranged between the first cylinder and the second cylinder, a first piston positioned in the first cylinder is sleeved outside the first eccentric part, a second piston positioned in the second cylinder is sleeved outside the second eccentric part, and a third piston positioned in the third cylinder is sleeved outside the third eccentric part; the main bearing is arranged on the end face, facing the motor part, of the first cylinder and sleeved on the crankshaft, the auxiliary bearing is arranged between the second cylinder and the third cylinder and sleeved on the crankshaft, the part, matched with the auxiliary bearing, of the crankshaft is an auxiliary shaft, the outer diameter of the auxiliary shaft is D1, the diameter of the third eccentric part is D2, the eccentric amount of the third eccentric part is e, and D1-D2-2e is not less than 0.

According to the three-cylinder compressor provided by the embodiment of the invention, the auxiliary bearing is arranged between the second cylinder and the third cylinder, so that the self-aligning installation of the cylinders is facilitated, the load of the part, positioned between the main bearing and the auxiliary bearing, of the crankshaft can be reduced, the deformation of the crankshaft is reduced, the rigidity of the crankshaft is improved, the reliability is improved, and the noise is reduced. Meanwhile, the installation of the auxiliary bearing is facilitated by enabling D1-D2-2e to be more than or equal to 0.

In some embodiments of the invention, a first partition is provided between the third cylinder and the secondary bearing.

In some embodiments of the present invention, a first bearing is disposed on an end surface of the third cylinder away from the auxiliary bearing, and the first bearing is sleeved on the crankshaft.

In some embodiments of the invention, the air suction volume of the first cylinder is V1, the air suction volume of the second cylinder is V2, the volume of the third cylinder is V3, and the relationships that V3 is less than or equal to 0.6V1 and V3 is less than or equal to 0.6V2 are satisfied.

In some embodiments of the present invention, the value range of the eccentricity e is e ≥ 1 mm.

In some embodiments of the invention, the value range of the eccentricity e is 1mm ≦ e ≦ 4 mm.

In some embodiments of the invention, the outer diameter D1 of the secondary shaft is greater than or equal to 16 mm.

In some embodiments of the invention, the part of the crankshaft which is matched with the main bearing is a main shaft, the outer diameter of the main shaft is D0, wherein D0 is less than or equal to D1.

In some embodiments of the invention, the three-cylinder compressor further comprises a motor bearing located on a side of the motor portion remote from the first cylinder, the crankshaft cooperating with the motor bearing.

The refrigeration device according to the embodiment of the invention comprises the three-cylinder compressor according to the embodiment of the invention.

According to the refrigeration device provided by the embodiment of the invention, the three-cylinder compressor provided by the embodiment of the invention is convenient for the self-aligning installation of the cylinder, and can reduce the load of the part of the crankshaft between the main bearing and the auxiliary bearing, reduce the deformation of the crankshaft, improve the rigidity of the crankshaft, improve the reliability and reduce the noise. Meanwhile, the installation of the auxiliary bearing is facilitated by enabling D1-D2-2e to be more than or equal to 0.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a three cylinder compressor according to some embodiments of the present invention;

FIG. 2 is a schematic view of a three cylinder compressor according to further embodiments of the present invention;

FIG. 3 is a schematic illustration of a crankshaft according to an embodiment of the present invention;

FIG. 4 is a top view of a crankshaft according to an embodiment of the present invention.

Reference numerals:

a three-cylinder compressor 100,

A motor part 1, a stator 10, a rotor 11,

Crankshaft 2, first eccentric section 20, second eccentric section 21, third eccentric section 22, counter shaft 23, main shaft 24, mating shaft 25,

A first cylinder 3, a second cylinder 4, a third cylinder 5,

A first piston 6, a second piston 7, a third piston 8,

A shell 9,

A middle partition plate 12,

A main bearing 13,

A secondary bearing 14,

A first separator 16,

A first bearing 17.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The three-cylinder compressor 100 according to the embodiment of the present invention is described below with reference to fig. 1 to 4, wherein the three-cylinder compressor 100 may be applied to a refrigeration apparatus, which may be an air conditioner, a refrigerator, or the like.

As shown in fig. 1 to 4, a three-cylinder compressor 100 according to an embodiment of the present invention includes: the engine comprises a motor part 1, a crankshaft 2, a first cylinder 3, a second cylinder 4, a third cylinder 5, a main bearing 13 and an auxiliary bearing 14, wherein the motor part 1 comprises a stator 10 and a rotor 11 which is in running fit with the stator 10. It is understood that the three-cylinder compressor 100 further includes a housing 9, etc., the motor part 1 may be disposed in the housing 9, and the stator 10 may be fixed on an inner wall of the housing 9.

The crankshaft 2 comprises a first eccentric portion 20, a second eccentric portion 21 and a third eccentric portion 22, and the rotor 11 is engaged with the crankshaft 2 to drive the crankshaft 2 to rotate.

The first cylinder 3, the second cylinder 4, and the third cylinder 5 are sequentially distributed in the axial direction of the crankshaft 2, that is, the second cylinder 4 is located between the first cylinder 3 and the third cylinder 5. A middle partition plate 12 is arranged between the first cylinder 3 and the second cylinder 4, a first piston 6 positioned in the first cylinder 3 is sleeved outside the first eccentric part 20, a second piston 7 positioned in the second cylinder 4 is sleeved outside the second eccentric part 21, and a third piston 8 positioned in the third cylinder 5 is sleeved outside the third eccentric part 22.

The main bearing 13 is arranged on the end face of the first cylinder 3 facing the motor part 1 and is sleeved on the crankshaft 2, the part of the crankshaft 2 matched with the main bearing 13 is a main shaft 24, the auxiliary bearing 14 is arranged between the second cylinder 4 and the third cylinder 5, the auxiliary bearing 14 is sleeved on the crankshaft 2, the part of the crankshaft 2 matched with the auxiliary bearing 14 is an auxiliary shaft 23, the outer diameter of the auxiliary shaft 23 is D1, the diameter of the third eccentric part 22 is D2, the eccentric amount of the third eccentric part 22 is e, and D1-D2-2e is more than or equal to 0. Specifically, in order to ensure that the diameter D2 of the third eccentric part 22 and the eccentric amount e of the third eccentric part 22 are not too small, the diameter D1 of the auxiliary shaft 23 is set to be large, and the outer diameter of the main shaft 24 is D0, wherein D0 is not less than D1.

Specifically, the third cylinder 5 is arranged on the side of the auxiliary bearing 14 far away from the main bearing 13, the crankshaft 2 comprises a first eccentric part 20, a second eccentric part 21, a third eccentric part 22, a main shaft 24 and an auxiliary shaft 23, the main bearing 13 is sleeved on the main shaft 24, the auxiliary bearing 14 is sleeved on the auxiliary shaft 23, the first piston 6 is sleeved on the first eccentric part 20, the second piston 7 is sleeved on the second eccentric part 21, the third piston 8 is sleeved on the third eccentric part 22, when the motor part 1 drives the crankshaft 2 to rotate, the first piston 6 eccentrically rotates in the first cylinder 3, the second piston 7 eccentrically rotates in the second cylinder 4, and the third piston 8 eccentrically rotates in the third cylinder 5. It is understood that each cylinder further includes a sliding vane, an exhaust valve, etc., and the compression principle of the refrigerant in each cylinder is known in the art and will not be described in detail herein.

By making the outer diameter of the auxiliary shaft 23, the diameter of the third eccentric portion 22, and the eccentric amount of the third eccentric portion 22 satisfy D1-D2-2e ≧ 0, when it is necessary to mount the auxiliary bearing 14, the auxiliary bearing 14 can be mounted to the auxiliary shaft 23 through the third eccentric portion 22, so that the third eccentric portion 22 and the rest of the crankshaft 2 can be an integrally formed piece, without providing the third eccentric portion 22 as a separable structure, so that the assembly process of the three-cylinder compressor 100 is simple.

In the installation process, the first cylinder 3 and the main bearing 13 need to be aligned, and the second cylinder 4 and the third cylinder 5 are aligned with the auxiliary bearing 14, so that the alignment of each cylinder is easy. Meanwhile, the auxiliary bearing 14 is arranged between the second cylinder 4 and the third cylinder 5, compared with the conventional method that the auxiliary bearing is arranged on the side, far away from the second cylinder, of the third cylinder, the distance between the main bearing 13 and the auxiliary bearing 14 is reduced, the load of the part, between the main bearing 13 and the auxiliary bearing 14, of the crankshaft 2 can be reduced, the deformation of the crankshaft 2 is reduced, the rigidity of the crankshaft 2 is improved, and the reliability is improved.

The three-cylinder compressor 100 may compress the refrigerant by a three-stage compression method, an independent compression method, a variable-capacity compression method, or the like, and the compression method will not be described in detail here.

According to the three-cylinder compressor 100 of the embodiment of the invention, the auxiliary bearing 14 is arranged between the second cylinder 4 and the third cylinder 5, so that the self-aligning installation of the cylinders is facilitated, and meanwhile, the load of the part, positioned between the main bearing 13 and the auxiliary bearing 14, of the crankshaft 2 can be reduced, the deformation amount of the crankshaft 2 is reduced, the rigidity of the crankshaft 2 is improved, the reliability is improved, and the noise is reduced. Meanwhile, the installation of the auxiliary bearing 14 is facilitated by enabling D1-D2-2e to be more than or equal to 0.

In some embodiments of the invention, as shown in fig. 2, a first diaphragm 16 is provided between the third cylinder 5 and the secondary bearing 14. Specifically, when the compressor is assembled, the first partition plate 16 may be fixed on the auxiliary bearing 14, and then the third cylinder 5 and the auxiliary bearing 14 may be aligned together, so that by providing the first partition plate 16, the hub size of the auxiliary bearing 14 may be reduced, and the hub size of the auxiliary bearing 14 may not be large due to the need to fix the third cylinder 5. It will of course be appreciated that the third cylinder 5 may also be fixed directly to the secondary bearing 14, as shown in figure 1.

As shown in fig. 1 and 2, in some embodiments of the present invention, the end surface of the third cylinder 5 far from the auxiliary bearing 14 is provided with a first bearing 17, and the first bearing 17 is sleeved on the crankshaft 2. Therefore, by providing the first bearing 17, the supporting function of the crankshaft 2 can be increased, the rigidity of the crankshaft 2 can be further enhanced, the deformation of the crankshaft 2 can be reduced, and the vibration and noise can be reduced. Specifically, at the time of centering, the third cylinder 5 and the first bearing 17 may be centered. Specifically, the portion of the crankshaft 2 that mates with the first bearing 17 is a mating shaft 25, and the outer diameter of the mating shaft 25 is D3, where D2-D3-2e ≧ 0, thereby facilitating the installation of the third piston 8.

According to the three-cylinder compressor 100 of the embodiment of the invention, because the third eccentric part 22 is smaller and the bearing capacity of the third eccentric part 22 is weaker, the suction volume of the third cylinder 5 is smaller than that of the first cylinder 3 and the second cylinder 4, specifically, the suction volume of the first cylinder 3 is V1, the suction volume of the second cylinder 4 is V2, and the volume of the third cylinder 5 is V3, which satisfy the relationship that V3 is less than or equal to 0.6V1, and V3 is less than or equal to 0.6V 2.

Wherein, because the third eccentric part 22 is smaller, but in order to ensure that the third cylinder 5 has enough air suction volume, it is necessary to ensure that the eccentric amount of the third eccentric part 22 cannot be too small, in some specific examples of the invention, the value range of the eccentric amount e is e ≧ 1 mm.

Because the outer diameter of the auxiliary shaft 23, the diameter of the third eccentric part 22 and the eccentric amount of the third eccentric part 22 need to satisfy the restriction that D1-D2-2e is more than or equal to 0, if the eccentric amount of the third eccentric part 22 is too large, the diameter D2 of the third eccentric part 22 is too large, and the bearing capacity of the crankshaft 2 is reduced, the value range of the eccentric amount e is 1mm to 4 mm.

In some embodiments of the present invention, the outer diameter D1 of the auxiliary shaft 23 is greater than or equal to 16mm, so as to ensure that the diameter of the third eccentric portion 22 and the eccentric amount e of the third eccentric portion 22 are not too small, and ensure that the third cylinder 5 has a sufficient air suction volume.

In some embodiments of the present invention, the three-cylinder compressor 100 further comprises a motor bearing (not shown) located on a side of the motor part 1 remote from the first cylinder 3, the crankshaft 2 cooperating with the motor bearing. Specifically, the motor bearing may be a sliding bearing, a rolling bearing, a knuckle bearing, or the like. Therefore, the motor bearing is arranged, so that the support of the crankshaft 2 can be increased, the rigidity of the crankshaft 2 can be further enhanced, the deformation of the crankshaft 2 is reduced, and the vibration and the noise are reduced.

The refrigeration device according to the embodiment of the present invention includes the three-cylinder compressor 100 according to the above-described embodiment of the present invention.

According to the refrigeration device of the embodiment of the invention, the three-cylinder compressor 100 according to the embodiment of the invention is arranged, so that the self-aligning installation of the cylinder is facilitated, the load of the part, positioned between the main bearing 13 and the auxiliary bearing 14, of the crankshaft 2 can be reduced, the deformation amount of the crankshaft 2 is reduced, the rigidity of the crankshaft 2 is improved, the reliability is improved, and the noise is reduced. Meanwhile, the installation of the auxiliary bearing 14 is facilitated by enabling D1-D2-2e to be more than or equal to 0.

Other constructions, such as condensers and evaporators, and the like, and operation of refrigeration units 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 herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A three-cylinder compressor, comprising:

the motor part comprises a stator and a rotor in running fit with the stator;

the crankshaft comprises a first eccentric part, a second eccentric part and a third eccentric part, and the rotor is matched with the crankshaft to drive the crankshaft to rotate;

the crankshaft comprises a first cylinder, a second cylinder and a third cylinder, wherein the first cylinder, the second cylinder and the third cylinder are sequentially distributed along the axial direction of the crankshaft, a middle partition plate is arranged between the first cylinder and the second cylinder, a first piston positioned in the first cylinder is sleeved outside the first eccentric part, a second piston positioned in the second cylinder is sleeved outside the second eccentric part, and a third piston positioned in the third cylinder is sleeved outside the third eccentric part;

the main bearing is arranged on the end face, facing the motor part, of the first cylinder and sleeved on the crankshaft, the auxiliary bearing is arranged between the second cylinder and the third cylinder and sleeved on the crankshaft, the part, matched with the auxiliary bearing, of the crankshaft is an auxiliary shaft, the outer diameter of the auxiliary shaft is D1, the diameter of the third eccentric part is D2, the eccentric amount of the third eccentric part is e, D1-D2-2e is not less than 0, the part, matched with the main bearing, of the crankshaft is a main shaft, the outer diameter of the main shaft is D0, and D0 is not less than D1.

2. The three-cylinder compressor according to claim 1, wherein a first partition plate is provided between the third cylinder and the secondary bearing.

3. The three-cylinder compressor according to claim 1, wherein a first bearing is arranged on an end surface of the third cylinder far away from the auxiliary bearing, and the first bearing is sleeved on the crankshaft.

4. The three-cylinder compressor according to claim 1, wherein the suction volume of the first cylinder is V1, the suction volume of the second cylinder is V2, and the volume of the third cylinder is V3, which satisfy the relationship of V3 ≤ 0.6V1, and V3 ≤ 0.6V 2.

5. The three-cylinder compressor according to claim 1, wherein the eccentricity e is in a range of e ≥ 1 mm.

6. The three-cylinder compressor according to claim 5, wherein the eccentricity e is in a range of 1mm to 4 mm.

7. The three-cylinder compressor as claimed in claim 1, wherein the external diameter D1 of the auxiliary shaft is greater than or equal to 16 mm.

8. The three-cylinder compressor according to any one of claims 1 to 7, further comprising a motor bearing located on a side of the motor portion remote from the first cylinder, the crankshaft cooperating with the motor bearing.

9. A refrigeration device, characterized by comprising a three-cylinder compressor according to any one of claims 1-8.