CN218207084U

CN218207084U - Cylinder body of rotary compressor cylinder

Info

Publication number: CN218207084U
Application number: CN202222833009.3U
Authority: CN
Inventors: 苏凤戈; 陈朱乐; 尚严晶
Original assignee: ZHEJIANG BAIDA PRECISION MANUFACTURING CORP
Current assignee: ZHEJIANG BAIDA PRECISION MANUFACTURING CORP
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-01-03
Anticipated expiration: 2032-10-26

Abstract

The utility model provides a rotary compressor cylinder body belongs to compressor technical field. The core rod is easy to break when the cylinder body of the cylinder of the existing rotary compressor is demoulded, and the pressed blank is easy to crack. The upper end face and the lower end face of the rotary compressor cylinder body are respectively provided with one or more arc-shaped heat insulation grooves, the heat insulation grooves are arranged around the axial lead of the piston cavity in the circumferential direction, the cylinder body is manufactured by adopting a powder metallurgy process, the heat insulation grooves on the upper end face and the heat insulation grooves on the lower end face are not directly communicated, therefore, a forming part for forming the heat insulation grooves in the powder metallurgy pressing die does not need to penetrate through the cylinder body, the forming part for forming the heat insulation grooves on the upper end face is fixedly connected with the upper punch, the forming part for forming the heat insulation grooves on the lower end face is fixedly connected with the lower punch, and the phenomena of core rod fracture and pressed blank fracture are not easy to occur in the using process of the powder metallurgy pressing die.

Description

Cylinder body of rotary compressor cylinder

Technical Field

The utility model belongs to the technical field of the compressor, a rotary compressor, especially a rotary compressor cylinder block are related to.

Background

The motor of the rotary compressor does not need to convert the rotary motion of the rotor into the reciprocating motion of the piston, but directly drives the rotary piston to rotate to complete the compression of the refrigerant vapor. The rotary compressor is widely used in small-sized home air conditioners, and compression efficiency and manufacturing costs of parts are more concerned due to a large production and sales volume of the small-sized home air conditioners.

The chinese patent document discloses a cylinder and a compressor (application No. 202121694809.0), a heat insulation groove penetrating through a first surface or/and a second surface of the cylinder in an axial direction of the cylinder; the thermal resistance is increased through the heat insulation groove, the temperature distribution of the inner wall surface of the air cylinder is reconstructed, and the temperature of the wall surface of the air cylinder is reduced, so that the heat absorption capacity of a low-temperature refrigerant of the air suction cavity is reduced, the volumetric efficiency is improved, the compression work per unit mass is reduced, the compression power consumption is reduced, and the compression efficiency is improved.

The applicant proposes to manufacture the cylinder block of the rotary compressor by using a powder metallurgy process and to scale up the production, the patent literature is a powder metallurgy pressing die for the cylinder of the compressor (application number 202122169520.3); the manufacturing method can reduce the manufacturing cost of the cylinder block. Those skilled in the art will readily appreciate that the cylinder with the heat-insulating groove is also manufactured by using powder metallurgy process, but since the cross section of the heat-insulating groove is in the shape of an arc narrow strip,

the core rod used for forming the heat insulation groove in the powder metallurgy pressing die is in a long strip shape and a sheet shape, the cross section of the core rod is arc-shaped, the core rod is easy to extrude and deform in the actual production process, the core rod is difficult to pull out, the core rod is easy to break, a pressed blank is easy to crack, the production efficiency and the qualification rate of the cylinder are further influenced, and the production cost is increased.

Disclosure of Invention

The utility model provides a rotary compressor cylinder body, the to-be-solved technical problem of the utility model is how to reduce the rotary compressor cylinder body manufacturing cost who has the heat sink.

The to-be-solved technical problem of the utility model can be realized through the following technical scheme: a cylinder body of a rotary compressor cylinder is of an integrated structure, wherein a cylindrical piston cavity, an installation connecting hole positioned at the periphery of the piston cavity, an air inlet hole communicated with the piston cavity, an air outlet hole and a blade groove are formed in the cylinder body; the upper end face and the lower end face of the cylinder body are respectively provided with one or more arc-shaped heat insulation grooves, the heat insulation grooves are arranged and arranged circumferentially around the axial lead of the piston cavity, the cylinder body is manufactured by adopting a powder metallurgy process, the heat insulation grooves on the upper end face and the heat insulation grooves on the lower end face are not directly communicated, therefore, a forming part for forming the heat insulation grooves in the powder metallurgy pressing die does not need to penetrate through the cylinder body, the forming part for forming the heat insulation grooves on the upper end face is fixedly connected with the upper punch, and the forming part for forming the heat insulation grooves on the lower end face is fixedly connected with the lower punch.

The thermal insulation effect of the cylinder block of the rotary compressor can be analyzed by setting the environment surrounding the cylinder block at a constant temperature, for example 100 ℃ or 150 ℃, measuring the time required for the temperature in the piston cavity of the cylinder block to reach a constant value and recording the constant temperature in the piston cavity. The test comparison shows that the cylinder body of the rotary compressor cylinder not only obviously reduces the constant temperature in the piston cavity and obviously prolongs the time required for the temperature in the piston cavity to reach the constant value compared with the cylinder body without the heat insulation groove.

Drawings

Fig. 1 is a schematic perspective view of a cylinder block of a rotary compressor according to an embodiment.

Fig. 2 is a schematic front view of a cylinder block of a rotary compressor according to an embodiment.

Fig. 3 isbase:Sub>A schematic sectional structure view ofbase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is a schematic perspective view of a cylinder block of a rotary compressor according to a second embodiment.

Fig. 5 is a schematic front view of a cylinder block of a rotary compressor according to a second embodiment.

Fig. 6 is a schematic sectional structure view of B-B in fig. 5.

In the figure, 1, a piston cavity; 2. connecting holes; 3. an air inlet; 4. an exhaust hole; 5. a blade groove; 6. and a heat insulation groove.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The first embodiment is as follows: as shown in fig. 1 to 3, the cylinder block of the rotary compressor is formed by a powder metallurgy process, and the cylinder block of the rotary compressor is of an integrated structure.

The cylinder body is provided with a piston cavity 1, a connecting hole 2, an air inlet 3, an air outlet 4 and a blade groove 5; the piston cavity 1 is positioned in the central area of the cylinder body of the cylinder, and the piston cavity 1 is cylindrical; the connecting hole 2 comprises a threaded hole and a positioning pin hole, the vane slot 5 and the connecting hole 2 are both positioned on the outer side of the piston cavity 1, and one end of the vane slot 5 is communicated with the piston cavity 1; the piston cavity 1, the connecting hole 2 and the vane groove 5 are arranged in a penetrating way along the axial direction of the cylinder body. The axial lead of the air inlet hole 3 is vertical to the axial lead of the piston cavity 1, the exhaust hole 4 is arranged at the edge of the side surface and the end surface of the piston cavity 1, and the air inlet hole 3 and the exhaust hole 4 are both communicated with the piston cavity 1.

The upper end surface and the lower end surface of the cylinder body are both provided with a circular arc-shaped heat insulation groove 6. The width of the bottom surface of the heat insulation groove 6 is smaller than the width of the opening, namely the side surface of the heat insulation groove 6 is obliquely arranged, and the separation of the forming part for forming the heat insulation groove 6 and the press forming piece of the cylinder body is facilitated by controlling the proper taper.

The depth of the heat insulation groove 6 is smaller than the width, and the depth of the heat insulation groove 6 is smaller than 6mm, so that the heat insulation groove 6 does not axially penetrate and the heat insulation groove 6 on the upper end surface and the heat insulation groove 6 on the lower end surface are not directly communicated, in other words, the heat insulation groove 6 on the upper end surface and the heat insulation groove 6 on the lower end surface of the heat insulation groove 6 are communicated through the connecting hole 2, and the indirect communication is achieved.

	Depth of the heat insulation groove 6	Width of the heat insulation groove 6
			Example one	2mm	4mm
Example two	2mm	5mm
			EXAMPLE III	2mm	7mm
Example four	4mm	5mm
			EXAMPLE five	4mm	7mm
Example six	4mm	8mm
			EXAMPLE seven	6mm	6.5mm
Example eight	6mm	7mm
			Example nine	6mm	8mm

This structure guarantees the width of the shaping portion of the thermal-insulated recess 6 of shaping effectively, and then avoids shaping portion deformation and is favorable to the shaping portion of the thermal-insulated recess 6 of shaping and the separation of the pressure forming spare of cylinder block.

Two sections of the heat insulation groove 6 extend close to the vane groove 5, and the distance between the end surface of the heat insulation groove 6 and the side surface of the vane groove 5 is generally the same as the distance between the inner side surface of the heat insulation groove 6 and the side surface of the piston cavity 1. The area of the end face of the cylinder body is obviously reduced by arranging the heat insulation groove 6, so that the technical difficulty of grinding the end face is reduced, and the processing cost of the cylinder body is reduced.

The end face of the cylinder body is in contact with the cylinder cover or the partition plate, the contact area of the cylinder body and the cylinder cover or the partition plate is remarkably reduced by arranging the heat insulation groove 6, the processing requirement of the cylinder cover or the partition plate can be further reduced, the processing cost of the cylinder cover or the partition plate is further reduced, and the manufacturing cost of the rotary compressor is reduced.

The cylinder block peripheral environment is set at a constant temperature, the time required for the temperature in the cylinder block piston cavity 1 to reach a constant value is measured, and the constant temperature in the piston cavity 1 is recorded. Test one: under the condition that the constant temperature of the peripheral environment is 100 ℃, the time required for the temperature in the piston cavity 1 of the cylinder body without the scheme of the heat insulation groove 6 to reach the constant value of 62 ℃ from 26 ℃ is 15 minutes; example two protocol the time required for the temperature in the piston cavity 1 of the cylinder block to reach a constant value of 60 c from 26 c was 21 minutes. And (2) test II: under the condition that the constant temperature of the peripheral environment is 150 ℃, the time required for the temperature in the piston cavity 1 of the cylinder body without the scheme of the heat insulation groove 6 to reach the constant value of 98 ℃ from 26 ℃ is 24 minutes; example two protocol the time required for the temperature in the cylinder block piston cavity 1 to reach a constant value of 92 c from 26 c was 37 minutes. Experiments prove that the heat insulation grooves 6 arranged on the upper end surface and the lower end surface of the cylinder body also have the heat insulation effect.

The second embodiment: as shown in fig. 4 to 6, the structure and principle of the present embodiment are substantially the same as those of the first embodiment, and the substantially same points are not described redundantly, but only different points are described, where: a plurality of arc-shaped heat insulation grooves 6 are formed in the upper end face and the lower end face of the cylinder body of the cylinder, and the heat insulation grooves 6 are arranged circumferentially around the axial lead of the piston cavity 1; in other words, one heat insulation groove is divided into a plurality of sections by taking the threaded hole 2a as a reference; the number of the heat insulation grooves is 5, a threaded hole 2a is formed between every two adjacent heat insulation grooves 6, and the distance between the end face of each heat insulation groove 6 and the side face of the threaded hole 2a is the same as the distance between the inner side face of each heat insulation groove 6 and the side face of the piston cavity 1.

Claims

1. A cylinder body of a rotary compressor cylinder is of an integrated structure, and a cylindrical piston cavity (1), an installation connecting hole (2) positioned at the periphery of the piston cavity (1), an air inlet hole (3) communicated with the piston cavity (1), an exhaust hole (4) and a blade groove (5) are formed in the cylinder body; the heat insulation structure is characterized in that the upper end face and the lower end face of the cylinder body are respectively provided with a circular arc-shaped heat insulation groove (6), two sections of the heat insulation grooves (6) extend to be close to the blade grooves (5), the heat insulation grooves (6) are not axially communicated, and the heat insulation grooves (6) on the upper end face and the heat insulation grooves (6) on the lower end face are not directly communicated;

or the upper end surface and the lower end surface of the cylinder body of the cylinder are respectively provided with a plurality of arc-shaped heat insulation grooves (6), and the heat insulation grooves (6) are arranged circumferentially around the axial lead of the piston cavity (1); the mounting and connecting hole (2) comprises a threaded hole (2 a), and a threaded hole (2 a) is formed between every two adjacent heat insulation grooves (6).

2. A rotary compressor cylinder block according to claim 1, characterised in that the width of the bottom surface of the insulating groove (6) is smaller than the width of the opening.

3. A rotary compressor cylinder block according to claim 1, characterised in that the depth of the thermally insulated groove (6) is less than the width.

4. A rotary compressor cylinder block according to claim 3, characterised in that the depth of the insulating groove (6) is 2mm-6mm and the width of the insulating groove (6) is 4mm-8mm.

5. A rotary compressor cylinder block according to claim 1 or 2 or 3 or 4, characterized in that the distance between the end surface of the insulation groove (6) and the side of the vane groove (5) is the same as the distance between the inner side surface of the insulation groove (6) and the side of the piston chamber (1).

6. A rotary compressor cylinder block according to claim 1 or 2 or 3 or 4, characterized in that the distance between the end surface of the heat insulation groove (6) and the side of the threaded hole (2 a) is the same as the distance between the inner side surface of the heat insulation groove (6) and the side of the piston cavity (1).