CN111664076A - Cylinder cover with exhaust valve plate lift self-adaption function, cylinder and refrigerator compressor - Google Patents

Abstract

The disclosure relates to a cylinder cover, a cylinder and a refrigerator compressor with self-adaptive exhaust valve plate lift, and belongs to the technical field of compressors, wherein an exhaust cavity is arranged in the cylinder cover, and a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece. The utility model discloses a cylinder head design has exhaust valve piece limit structure, compares simple structure with traditional limiting plate, workable, and the cooperation size is more accurate. Meanwhile, the exhaust valve plate limiting plate and the exhaust valve reed of the traditional structure can be eliminated, the number of parts and the installation process are reduced, and the purposes of saving manpower and reducing cost can be achieved.

Description

Cylinder cover with exhaust valve plate lift self-adaption function, cylinder and refrigerator compressor

Technical Field

The disclosure belongs to the technical field of compressors, and particularly relates to a cylinder cover, a cylinder and a refrigerator compressor with self-adaptive exhaust valve plate lift.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

The cylinder cover is a key part of the refrigerator compressor, can realize the separation of high and low pressure cavities in the running process of the press and ensure the normal air suction and exhaust circulation of the press. The cylinder head exhaust cavity performs buffering and silencing functions in the exhaust system. The heat exchange efficiency of the cylinder head affects the refrigerating capacity and efficiency of the compressor, and the heat generation of the cylinder head component can be improved due to the increase of the volume of the exhaust cavity of the cylinder cover.

The inventor discovers that the existing exhaust valve plate is installed in a valve plate groove and is compressed and positioned through an exhaust valve reed and an exhaust valve limiting plate, the lift of the exhaust valve plate is fixed, the exhaust valve plate is determined by the limiting plate structure, the optimal lift height can not be selected by different discharge capacities of different product platforms, the efficiency of the compressor is not favorably measured and optimized, a reinforcing rib and a limiting plate pressing structure are arranged in an exhaust cavity of a cylinder cover, the exhaust cavity is occupied, the volume of the exhaust cavity is large, and the exhaust efficiency is influenced.

Disclosure of Invention

To the technical problem that prior art exists, this disclosure provides a cylinder head, cylinder and refrigerator compressor with exhaust valve piece lift self-adaptation.

The disclosure discloses a cylinder cover with self-adaptive exhaust valve plate lift, wherein an exhaust cavity is arranged in the cylinder cover, and a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece which is contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece.

Furthermore, the limiting piece is a limiting piece with an upper surface and a lower surface both bending downwards, and the upper surface of the limiting piece is contacted with the exhaust valve plate;

further, the upper surface of the limiting block is the same as the surface profile of the exhaust valve plate.

Furthermore, the thickness of the contact surface of the limiting block and the exhaust valve plate is more than or equal to 2mm, and the edge of the contact surface is provided with a fillet.

Furthermore, a polymer coating process is used for one surface of the limiting part, which is in contact with the exhaust valve plate.

Further, the mounting base is disposed on a bottom surface of the exhaust chamber.

Furthermore, the whole outline of the installation base is the same as the outline of the limiting part, and the profiling design is adopted, so that the accurate positioning of the limiting part during installation by adopting a tool is guaranteed.

Furthermore, the positioning table and the mounting table are both provided with cylindrical surfaces; the positioning table is connected with the mounting table through a spring or a damper; the spring is in interference fit with the positioning table and the cylindrical table respectively, and under the action of the spring or the damper, products with different platforms and different discharge capacities can automatically select an optimal lift scheme matched with the gas thrust of the exhaust valve plate, so that the accurate efficiency improvement of the valve group is realized.

At least one embodiment of the present disclosure also discloses a cylinder, which includes any one of the cylinder heads with the exhaust valve plate lift self-adaptive function.

At least one embodiment of the disclosure also discloses a refrigerator compressor, and the compressor is any one of the cylinder heads with the self-adaptive exhaust valve plate lift.

The embodiment disclosed above achieves the following advantages:

(1) the exhaust cavity in the cylinder cover of the utility model cancels the reinforcing ribs and the limiting plate compression structure, increases the volume of the exhaust cavity, improves the exhaust efficiency and reduces the exhaust temperature.

(2) This cylinder head exhaust chamber base on be connected with the stopper that contacts with the discharge valve piece, compare simple structure with traditional limiting plate, workable, cooperation size is more accurate. Meanwhile, the exhaust valve plate limiting plate and the exhaust valve reed of the traditional structure can be eliminated, the number of parts and the installation process are reduced, and the purposes of saving manpower and reducing cost can be achieved.

(3) The locating part in the cylinder cover is connected with the installation base through the elastic part, and under the action of the elastic part, products with different platforms and different discharge capacities can automatically select and use the optimal lift scheme matched with the gas thrust of the exhaust valve plate, so that the accurate effect improvement of the valve group is realized.

(4) The profile of the contact surface of the limiting block and the exhaust valve plate is consistent with that of the valve tongue of the exhaust valve plate, and the contact surface has a certain radian, so that the impact stress of the valve plate can be effectively relieved when the contact surface is flapped with the valve plate, and the service life of the valve plate is prolonged.

(5) The surface of the limiting part, which is in contact with the exhaust valve plate, is coated with a polymer coating process (such as graphene and molybdenum disulfide), or embedded with a PPEK material, or directly processed by a polymer material such as PEEK and the like, so that the slapping noise of the exhaust valve plate and the limiting plate is reduced, the valve group is denoised, and the sound quality of the compressor is improved.

(6) The whole profile of the installation base is the same as that of the limiting part, and the profiling design is adopted, so that the accurate positioning of the limiting device in the process of tool installation is facilitated.

(7) This open setting is at the spring or the attenuator between installation base and locating part, and the spring is respectively in location platform and mount table interference fit, guarantees joint strength, and makes the locating part installation fix at the cylinder head inner chamber.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

FIG. 1 is a schematic view of a mounting structure of an exhaust valve plate disclosed in the prior art;

fig. 2 is a cylinder head structure view of a compressor of a refrigerator disclosed in the prior art;

FIG. 3 is a diagram of a limiting plate of the exhaust valve plate in FIG. 1;

FIG. 4 is a schematic structural view of a cylinder head disclosed in an embodiment of the present disclosure;

fig. 5 is a front view of a limiting member according to an embodiment of the disclosure;

fig. 6 is an axial view of a limiter according to an embodiment of the disclosure.

In the figure, 1, an exhaust cavity, 2, a mounting base, 21, a mounting table, 3, a limiting piece, 31 and an arc-shaped block,

32. a positioning table 4 and a spring.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure.

As shown in fig. 1, the exhaust valve plate in the existing cylinder is installed on the valve plate, a special valve plate groove is arranged on the valve plate and used for placing the exhaust valve plate, the exhaust valve plate is placed at the bottom end of the valve plate groove, and an exhaust valve reed and an exhaust valve limiting plate are sequentially arranged on the exhaust valve plate, so that the installation efficiency is not high, the number of parts is large, the comprehensive cost is high, and meanwhile, as shown in fig. 2, a reinforcing rib and a limiting plate pressing structure are required to be arranged in the exhaust cavity of the existing cylinder cover, and the large volume of the exhaust cavity is also occupied.

The structure of the cylinder cover with the exhaust valve block lift self-adaption function disclosed by the embodiment of the disclosure is shown in fig. 4, an exhaust cavity 1 is arranged in the cylinder cover, a corresponding reinforcing rib or limiting plate pressing structure is not needed to be arranged in the exhaust cavity, only an installation base 2 is arranged in the exhaust cavity, an installation table 21 is arranged on the installation base, a limiting part 3 which is in contact with the exhaust valve block is arranged at the top of the installation base, and the limiting part and the installation base are connected through the lift self-adaption structure, so that the limiting part can move up and down relative to the installation base. Like this through the motion realization exhaust valve piece of locating part closure, compare in traditional cylinder head in fig. 2, the cylinder head disclosed of this embodiment is inside to have cancelled strengthening rib and traditional limiting plate compact structure, has increased the exhaust chamber volume, has improved exhaust efficiency, has reduced exhaust temperature.

Further, the mounting base 2 may be welded to the bottom of the exhaust cavity, and in other embodiments, the mounting base may be integrally formed with the cylinder head, but the contour of the mounting base is identical to that of the position-limiting member, so that a profiling design is adopted to help ensure accurate positioning of the position-limiting member when the position-limiting member is mounted by using a tool, and only the position-limiting member needs to be aligned with the outer contour of the mounting base.

As shown in fig. 5, the limiting member in the embodiment of the present disclosure mainly includes an arc block 31 contacting with the exhaust valve sheet and a positioning table 32 disposed on the arc block, where the positioning table 32 is disposed on a side surface of the arc plate facing the exhaust cavity, and the positioning table 32 corresponds to a position of an installation table on the installation base.

The upper surface and the lower surface of the arc-shaped block are bent downwards and have certain radians, and the surface of the arc-shaped block, which is in contact with the exhaust valve plate, has the contour identical to that of the upper surface and the valve tongue of the exhaust valve plate, so that the impact stress of the exhaust valve plate can be effectively relieved when the exhaust valve plate is flapped by the limiting block, and the service life of the exhaust valve plate is prolonged.

In order to ensure the strength of a contact surface of the limiting piece and the exhaust valve plate, the thickness of the contact surface is more than or equal to 2 mm; in order to prolong the service life of the exhaust valve plate, the edge of the contact surface is designed with a fillet, so that the exhaust valve plate can be prevented from accelerating failure due to the increase of impact stress of the exhaust valve plate caused by stress concentration.

Further, as shown in fig. 6, a polymer coating process (such as graphene, molybdenum disulfide, etc.) can be used on the surface of the arc-shaped block on the limiting member, which is in contact with the exhaust valve plate, or a PPEK material is embedded in the surface of the arc-shaped block, or the arc-shaped block is directly processed by using a polymer material such as PEEK, so that the slapping noise of the exhaust valve plate and the arc-shaped block is reduced, the noise reduction of the valve group is realized, and the sound quality.

It is naturally easy to think that the surface corresponding to the exhaust valve plate can also use the polymer coating process, that is, the surface of the exhaust valve plate contacting with the arc block uses the polymer coating process, thus the noise reduction function of the valve group is improved.

Further, above-mentioned locating part can be through die-casting integrated into one piece in this embodiment, simple structure, and high with the imitative face degree of agreeing with of exhaust valve piece, compare in the limit structure of traditional exhaust valve piece, can replace traditional exhaust valve piece limiting plate and exhaust valve reed through this implementation setting locating part in the exhaust cavity, reduced the quantity and the installation procedure of part.

Because the gas thrust that different platforms, different discharge capacity product discharge valve piece received is different, and the resilience force also is different, the optimum discharge valve piece lift that is suitable for in principle also differs, and the discharge valve piece lift of present scheme is fixed, can't select optimum lift height, is unfavorable for compressor efficiency to survey the optimization. The lift of the existing exhaust valve plate is fixed, as shown in fig. 3, which is determined by a limiting plate structure, different product platforms cannot select the optimal lift height with different displacements, which is not beneficial to the optimization of the efficiency of the compressor, so that a self-adaptive structure of the lift of the exhaust valve plate is arranged between a limiting piece and an installation base in the cylinder cover disclosed in the embodiment, specifically, as shown in fig. 4, a spring 4 is arranged between the limiting piece and the installation base, two ends of the spring are respectively sleeved on a positioning table on the limiting piece and an installation table on the installation base and are in interference fit, thus ensuring the connection strength between the limiting piece and the installation base, and realizing that the limiting piece is installed in an exhaust cavity, so that when the limiting piece is subjected to impact forces of different sizes, products of different platforms and different displacements can automatically select the optimal lift scheme matched, the valve bank is accurate and efficient.

In other embodiments, the limiting plate and the mounting base can be connected through a damper.

Besides, the embodiment of the disclosure also discloses an air cylinder, which comprises the cylinder cover with the self-adaptive exhaust valve plate lift, and a refrigerator compressor, which comprises the cylinder cover with the self-adaptive exhaust valve plate lift.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims (10)

1. The cylinder cover with the self-adaptive exhaust valve plate lift is provided with an exhaust cavity in the cylinder cover and is characterized in that,

a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece.

2. The cylinder head having exhaust valve lift adaptation of claim 1, wherein the stopper is a stopper having an upper surface and a lower surface both bent downward, and the upper surface of the stopper contacts the exhaust valve.

3. The cylinder head with exhaust valve lift adaptation of claim 2, wherein the upper surface of the stopper has the same surface profile as the exhaust valve.

4. The cylinder head with self-adaption of the lift of the exhaust valve plate as claimed in claim 2, wherein the thickness of a contact surface of the limiting block and the exhaust valve plate is larger than or equal to 2mm, and the edge of the contact surface is provided with a round angle.

5. The cylinder head with adaptive lift of the exhaust valve plate according to claim 1, wherein a surface of the retainer contacting the exhaust valve plate is coated with a polymer.

6. The cylinder head with exhaust valve lift adaptation of claim 1, wherein the mounting base is disposed on a bottom surface of the exhaust cavity.

7. The cylinder head with exhaust valve lift adaptation of claim 6, wherein an overall profile of the mounting base is the same as the retainer profile.

8. The cylinder head with adaptive lift of the exhaust valve plate according to claim 1, wherein the positioning table and the mounting table are provided with cylindrical surfaces; the positioning table is connected with the cylindrical table through a spring or a damper; the spring is in interference fit with the positioning table and the cylindrical table respectively.

9. A cylinder comprising a cylinder head with exhaust valve lift adaptation according to any of claims 1 to 8.

10. A refrigerator compressor comprising a cylinder head with exhaust valve plate lift adaptation according to any one of claims 1 to 8.

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