CN107366622B

CN107366622B - Cover seal and cover seal assembly for compressor and compressor

Info

Publication number: CN107366622B
Application number: CN201710524518.9A
Authority: CN
Inventors: 曹小军; 曹红军; 周亚运; 朱斌生
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2020-06-19
Anticipated expiration: 2037-06-30
Also published as: CN107366622A

Abstract

The invention discloses a cover sealing piece, a cover sealing assembly and a compressor for the compressor, wherein the cover sealing piece is suitable for being arranged at one axial end of an air cylinder of the compressor to seal one axial end of a compression cavity of the air cylinder, the cover sealing piece is provided with an exhaust hole communicated with the compression cavity, the inlet end of the exhaust hole is respectively overlapped with the axial end face of the air cylinder, the compression cavity and a sliding sheet in the moving process along the axial projection of the air cylinder, the inlet edge of the exhaust hole is provided with a flow guide notch, and the flow guide notch and the compression cavity are overlapped along the axial projection of the air cylinder. According to the cover sealing piece for the compressor, the compressor can exhaust gas more smoothly, and the performance is improved.

Description

Cover seal and cover seal assembly for compressor and compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a cover sealing piece for a compressor, a cover sealing assembly for the compressor and the compressor with the cover sealing assembly.

Background

In a hermetic compressor, a refrigerant is compressed in a compression chamber of a compression mechanism, and when a refrigerant gas is compressed to a predetermined pressure in the compression chamber, a discharge valve is opened, and the gas flow is discharged out of the compression chamber through a discharge hole. In the related art, a large vortex region is formed at the outlet of the exhaust hole, resulting in a large gradient of the air flow velocity at the outlet section of the exhaust hole, hindering the smoothness of the exhaust.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention proposes a cover seal for a compressor, which makes the discharge of the compressor smoother.

The invention also provides a cover sealing component for a compressor, which is provided with the cover sealing piece.

The invention also provides a compressor with the cover sealing assembly.

According to the cover sealing piece for the compressor, the cover sealing piece is suitable for being arranged at one axial end of a cylinder of the compressor to seal one axial end of a compression cavity of the cylinder, the cover sealing piece is provided with an exhaust hole communicated with the compression cavity, an inlet end of the exhaust hole is respectively overlapped with axial end faces of the cylinder, the compression cavity and a sliding piece in the moving process along the axial projection of the cylinder, a flow guide notch is arranged on an inlet edge of the exhaust hole, and the flow guide notch is overlapped with the axial projection of the compression cavity along the cylinder.

According to the cover sealing piece for the compressor, the compressor can exhaust gas more smoothly, and the performance is improved.

In addition, the cover seal for a compressor according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the invention, a projection of the flow guide notch along the axial direction of the cylinder is located within an axial projection of the compression chamber.

Optionally, the relief surface of the diversion relief comprises at least one surface.

Further, the notch plane of the diversion notch comprises at least one curved surface.

Still further, the notch surface of the diversion notch includes a first surface extending along the circumferential direction of the exhaust hole and a second surface connected to one end of the first surface, and the first surface is formed into a curved surface.

Specifically, the second surface extends in the axial direction of the cylinder or obliquely to the axial direction of the cylinder.

In some embodiments of the invention, the notch surface of the diversion notch further comprises a third surface connected to the other end of the first surface.

Specifically, the third surface extends in the axial direction of the cylinder or obliquely to the axial direction of the cylinder.

Optionally, the diversion gaps are formed during casting of the closure or by material removal after the closure is manufactured.

According to some embodiments of the invention, the cover seal is a bearing or a spacer.

The cover sealing assembly for the compressor comprises the cover sealing piece and the exhaust valve, wherein the exhaust valve is connected with the cover sealing piece and is arranged at the exhaust hole to open and close the exhaust hole.

The compressor provided by the embodiment of the invention comprises the cover sealing assembly provided by the embodiment of the invention.

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 structural view of a closure according to a first embodiment of the present invention;

FIG. 2 is a schematic perspective view of a closure on a compression mechanism according to a first embodiment of the present invention;

FIG. 3 is a schematic structural view of a closure according to a second embodiment of the present invention;

FIG. 4 is a schematic view of a projection of a closure onto a compression mechanism according to a second embodiment of the present invention;

FIG. 5 is a schematic structural view of a closure according to a third embodiment of the present invention;

FIG. 6 is a schematic view of a projection of a closure onto a compression mechanism according to a third embodiment of the present invention;

FIG. 7 is a schematic structural view of a closure according to a fourth embodiment of the present invention;

FIG. 8 is a schematic view of a projection of a closure onto a compression mechanism according to a fourth embodiment of the present invention;

FIG. 9 is a schematic structural view of a closure according to a fifth embodiment of the present invention;

FIG. 10 is a schematic view of a projection of a closure onto a compression mechanism according to a fifth embodiment of the present invention;

FIG. 11 is a schematic structural view of a closure according to a sixth embodiment of the present invention;

FIG. 12 is a schematic view of a projection of a closure onto a compression mechanism according to a sixth embodiment of the present invention;

FIG. 13 is a schematic structural view of a closure according to a seventh embodiment of the present invention;

FIG. 14 is a schematic perspective view of a closure on a compression mechanism according to a seventh embodiment of the present invention;

FIG. 15 is a schematic structural view of a closure according to an eighth embodiment of the present invention;

FIG. 16 is a schematic view of a projection of a closure onto a compression mechanism according to an eighth embodiment of the invention;

FIG. 17 is a schematic structural view of a closure according to a ninth embodiment of the present invention;

FIG. 18 is a schematic view of a projection of a closure onto a compression mechanism according to a ninth embodiment of the invention.

Reference numerals:

a lid seal 100; a cylinder 200; a compression chamber 210; a slide groove 220; a crankshaft 300; a piston 400; a slip sheet 500;

an exhaust hole 11; a diversion gap 12;

a notch surface 120; a first face 121; a second face 122; and a third face 123.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary embodiments for explaining the present invention with reference to the drawings and should not be construed as limiting the present invention, and those skilled in the art can make various changes, modifications, substitutions and alterations to the embodiments without departing from the principle and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

A compressor according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The compressor according to an embodiment of the present invention may include a casing, a driving part, and a compressing part, wherein the casing may be a hermetic container, and the casing may have a suction port and a discharge port thereon. The compression component is arranged in the shell and used for compressing the refrigerant. The driving part may be a motor or the like and is provided in the housing to supply power for the operation of the compressing part. The following description will be given by taking a compressor as an example, and it is obvious to those skilled in the art that the compressor is a compressor of other types (e.g., a scroll compressor, a reciprocating compressor) after reading the following technical solutions.

Specifically, the compression part may include a crankshaft 300, a cylinder assembly, a head seal 100 according to an embodiment of the present invention, and the like, as shown in fig. 1 and 2. Wherein the cylinder assembly may include one or more cylinders 200, each cylinder 200 having a compression chamber 210 axially therethrough, and the head seal 100 may be disposed at an axial end of the cylinder 200 to close an axial end of the compression chamber 210. Here, the two cap seals 100 may be provided, so that the two axial ends of the cylinder 200 may be respectively capped by the two cap seals 100. In addition, when the plurality of cylinders 200 is provided, a space and a seal may be provided between two adjacent cylinders 200 by a partition or the cap seal 100 according to an embodiment of the present invention.

In which a discharge valve may be installed on the cap seal 100, the discharge valve being located at the discharge hole 11 and being capable of opening and closing the discharge hole 11. When the refrigerant is compressed to a discharge pressure in the compression chamber 210, the discharge valve is opened, and the air flow is discharged out of the compression chamber 210 through the discharge hole 11. When the pressure of the refrigerant in the compression cavity 210 does not reach the discharge pressure, the pressure of the refrigerant is not enough to open the discharge valve, and the discharge valve can close the discharge hole 11 at the moment, so that the compression cavity 210 is prevented from discharging air outwards, and the normal operation of compression work is ensured. Here, the cap seal 100 and the discharge valve may constitute a cap seal assembly according to an embodiment of the present invention.

The crankshaft 300 is connected to a driving part, eccentric portions are formed at portions of the crankshaft 300 located in each compression chamber 210, and a piston 400 is fitted over the corresponding eccentric portion in each compression chamber 210. Each cylinder 200 further has a vane groove 220 extending in a radial direction of the cylinder 200 and communicating with the compression chamber 210, and a vane 500 reciprocally movable in the radial direction of the cylinder 200 is provided in the vane groove 220, as shown in fig. 2.

Therefore, in the process that the driving part drives the crankshaft 300 to rotate, the crankshaft 300 can push the piston 400 to roll along the inner wall of the compression cavity 210, and the piston 400 can push the sliding piece 500 to reciprocate in the process that the piston 400 rolls along the inner wall of the compression cavity 210, so that the refrigerant is sucked into the compression cavity 210 through the cooperation of the piston 400 and the sliding piece 500, and is discharged out of the compression cavity 210 through the exhaust hole 11 after the compression in the compression cavity 210 is completed.

It is understood that the detailed operation principle of the rotary compressor is known to those skilled in the art and will not be described in further detail herein. In addition, the construction and operation of other types of compressors are known to those skilled in the art and will not be described in detail.

The cap seal 100 according to an embodiment of the present invention is described in detail below.

Referring to fig. 1 to 18, in some embodiments of the present invention, the discharge hole 11 may be located at an intersection of the compression chamber 210 and the vane groove 220, as viewed in an extending direction of a radial section of the cylinder 200, and a partial area of an inlet end of the discharge hole 11 coincides with a surface portion of the vane 500. Specifically, the inlet ends of the discharge holes 11 overlap the axial end surface of the cylinder 200, the compression chamber 210, and the projection of the sliding piece 500 during movement along the axial direction of the cylinder 200, respectively.

That is, a projection of the inlet end of the discharge hole 11 along the axial direction of the cylinder 200 (e.g., a direction perpendicular to the paper in fig. 2) overlaps a projection of an axial end face of the cylinder 200 along the axial direction of the cylinder 200, a projection of the inlet end of the discharge hole 11 along the axial direction of the cylinder 200 overlaps a projection of the compression chamber 210 along the axial direction of the cylinder 200, and a projection of the inlet end of the discharge hole 11 along the axial direction of the cylinder 200 overlaps a projection of the sliding piece 500 during movement along the axial direction of the cylinder 200. It should be noted that the axial end surface of the cylinder 200 described herein may be understood as an end surface of a solid portion of the cylinder 200, i.e., a portion not including the compression chamber 210.

When the exhaust hole 11 is arranged at the above-described position, the exhaust resistance of the compressor can be effectively reduced, the performance of the compressor is improved, and the performance of the compressor is not reduced due to excessive increase of the clearance volume of the exhaust hole 11.

In the related art, a process chamfer is provided at a position of the exhaust hole close to the end surface of the cylinder to remove burrs. When high-pressure refrigerant gas enters the exhaust hole, the section of the flow channel is suddenly changed, the inertia of the gas flow forms a larger vortex area at the outlet of the exhaust hole, so that the gas flow speed on the section of the outlet of the exhaust hole forms a larger gradient, and the smoothness of exhaust is hindered.

To ameliorate this problem, the inventors have devised a new construction of the cap seal 100 based on the streamlined nature of the fluid jet. Specifically, referring to fig. 1 to 18, a cap seal 100 according to some embodiments of the present invention may have a guide notch 12, and the guide notch 12 may be disposed on an inlet edge of the discharge hole 11. Here, the inlet edge of the discharge hole 11 is the edge of the discharge hole 11 facing the compression chamber 210. Further, the projection of the flow guide notch 12 along the axial direction of the cylinder 200 has an overlap with the projection of the compression chamber 210 along the axial direction of the cylinder 200. That is, the axial projection of the flow guide notch 12 along the cylinder 200 overlaps the axial projection of the compression chamber 210.

Therefore, at least one part of the diversion notch 12 can face the compression cavity 210, the diversion notch 12 has a diversion effect on gas, exhaust vortex loss at the inlet of the exhaust hole 11 can be reduced, and the airflow speed gradient on the outlet section of the exhaust hole 11 is reduced, so that the aims of reducing the exhaust flow speed, improving the inlet force of the compressor and improving the energy efficiency are fulfilled.

According to the cap seal 100 of the embodiment of the invention, the guide notch 12 is arranged on the inlet edge of the exhaust hole 11, and the axial projection of the guide notch 12 along the axial direction of the cylinder 200 is overlapped with the axial projection of the compression cavity 210, so that the flowing condition of gas at the exhaust hole 11 can be improved, the smoothness of exhaust is improved, the input force of the compressor is improved, the energy efficiency of the compressor is increased, and the exhaust performance of the compressor is improved.

Further, a projection of the flow guide notch 12 along the axial direction of the cylinder 200 may be located in a projection of the compression chamber 210 along the axial direction of the cylinder 200, as shown in fig. 1 to 18. Therefore, the diversion gap 12 can completely correspond to the compression cavity 210, and cannot exceed the inner peripheral wall surface of the compression cavity 210, so that the additional increase of the clearance volume is avoided, and the further improvement of the inlet force of the compressor is facilitated.

In the present invention, the shape of the exhaust hole 11 is not particularly limited, and the exhaust hole 11 may be formed in a circular shape as shown with reference to fig. 1 to 8. Therefore, the exhaust device is convenient to manufacture, and has smoother exhaust and lower exhaust noise. Of course, the exhaust holes 104 may be formed in other shapes, such as a polygon, a fan, or an irregular shape, etc., as desired. Further, the exhaust hole 11 may or may not extend in the axial direction of the cylinder 200, and may extend obliquely to the axial direction of the cylinder 200, for example.

The diversion gaps 12 are described in detail below with reference to the drawings.

Referring to fig. 1 to 18, the notch surface 120 of the diversion notch 12 may include at least one surface, for example, two surfaces or three surfaces, and may be flexibly configured according to the exhaust requirement and the like so as to maintain the exhaust performance at an excellent level. Further, the notch surface 120 of the diversion notch 12 may include at least one curved surface, which has better air flow diversion performance and better exhaust swirl loss improvement performance.

For example, in the embodiment shown in fig. 1 and 2, the notch surface 120 of the diversion notch 12 includes a curved surface that can guide the airflow at the inlet of the discharge hole 11, reduce the discharge swirl loss at the inlet of the discharge hole 11 and the airflow velocity gradient at the outlet cross section, and better improve the compressor inlet force.

Referring to fig. 3 to 10, the notch surface 120 of the diversion notch 12 may include a first surface 121 and a second surface 122, the first surface 121 extends along a circumferential direction of the exhaust hole 11, and the second surface 122 is connected to one end of the first surface 121, wherein the first surface 121 is formed as a curved surface to ensure a good diversion effect and facilitate manufacturing. Optionally, the second surface 122 may be formed as a plane or a curved surface, and may be flexibly disposed according to specific situations, and the extending direction of the second surface 122 may also be flexibly disposed, which is not particularly limited in the present invention.

For example, in the particular embodiment shown in FIGS. 3-6, the second face 122 may be disposed along an axial extension of the cylinder 200, and the second face 122 may be disposed at an end of the first face 121 distal from the vane 500, as shown in FIGS. 3 and 4, or adjacent to an end of the vane 500, as shown in FIGS. 5 and 6. At this time, the whole notch surface 120 is smooth and regular, the manufacture is convenient and the flow conductivity is good.

Alternatively, as shown in fig. 3, when the second surface 122 is disposed at an end of the first surface 121 away from the vane 500, a projection of the second surface 122 in the axial direction of the cylinder 200 may coincide with the contour line of the compression chamber 210, and in this case, the second surface 122 does not exceed the inner peripheral wall surface of the compression chamber 210, and an additional increase in the clearance volume may be avoided. Alternatively, as shown in fig. 4, when the second surface 122 is disposed at an end of the first surface 121 adjacent to the vane 500, a projection of the second surface 122 in the axial direction of the cylinder 200 may fall on a contour line of the vane 500 during the movement.

Therefore, the diversion notch 12 can correspond to the compression cavity 210, and can not exceed the inner peripheral wall surface of the compression cavity 210 and can not extend to the sliding sheet groove 220, so that the increase of the clearance volume can be avoided, the effect of further improving the force of the compressor is achieved, the sealing of the end surface of the sliding sheet 500 can not be influenced, the situation that the exhaust process is finished in advance due to the fact that the high-low pressure cavity is communicated through the diversion notch 12 when the diversion notch 12 influences the piston 400 to rotate and compress the refrigerant can be prevented, the backflow expansion loss is further caused to deteriorate, and the performance of the compressor is reliable.

For another example, in the particular embodiment shown in FIGS. 7-10, the second face may be disposed obliquely to the axial extension of the cylinder 200, and the second face 122 may be disposed at an end of the first face 121 adjacent to the vane 500, as shown in FIGS. 7 and 8, or away from an end of the vane 500, as shown in FIGS. 9 and 10. At this time, the whole notch surface 120 is smooth and regular, the manufacture is convenient and the flow conductivity is good.

Referring to fig. 11 to 18, the notch surface 120 of the guide notch 12 may include a third surface 123 in addition to the first surface 121 and the second surface 122, the first surface 121 is formed as a curved surface and extends in a circumferential direction of the discharge hole 11, the second surface 122 is connected to one end of the first surface 121, and the third surface 123 is connected to the other end of the first surface 121. Therefore, a good flow guide effect can be ensured, and the manufacturing is convenient. Alternatively, the third surface 123 may be formed as a plane or a curved surface, and may be flexibly configured according to specific situations. The extending direction of the third surface 123 may also be flexibly set, similar to the second surface 122, and the invention is not limited thereto.

For example, as shown in fig. 11 and 12, the second surface 122 and the third surface 123 are respectively provided extending in the axial direction of the cylinder 200; as shown in fig. 13 and 14, the second face 122 and the third face 123 may extend obliquely to the axial direction of the cylinder 200, respectively; as shown in fig. 15 to 18, one of the second face 122 and the third face 123 may extend in the axial direction of the cylinder 200, and the other may extend obliquely to the axial direction of the cylinder 200. Therefore, the notch surface 120 is smooth and regular, convenient to manufacture and good in flow conductivity.

In the present invention, the forming manner of the diversion gap 12 is not specifically limited, and optionally, the diversion gap 12 may be formed when the cap seal 100 is cast, or may be formed by removing material after the cap seal 100 is manufactured, and different processes may be flexibly adopted to form the diversion gap 12 according to the manufacturing conditions.

According to some embodiments of the invention, the cap seal 100 may be a bearing or a spacer. When the head seal 100 is a bearing, the head seal 100 may be disposed at one axial end of the cylinder 200; when the head seal 100 is a partition, the head seal 100 may be disposed between two adjacent cylinders 200 to perform a separation and sealing function.

For example, in some specific examples of the present invention, the cylinder assembly may be provided with a main bearing and a secondary bearing at two axial ends thereof, and when the compressor uses the main bearing to exhaust air, the main bearing may have an exhaust hole 11 thereon, and in this case, the main bearing may use the cap seal 100 according to an embodiment of the present invention, and the main bearing may be provided with an exhaust valve thereon; when the compressor exhausts air by adopting the auxiliary bearing, the auxiliary bearing can be provided with an exhaust hole 11, in this case, the auxiliary bearing can adopt the cover sealing piece 100 according to the embodiment of the invention, and the auxiliary bearing can be provided with an exhaust valve; when the compressor adopts the main bearing and the auxiliary bearing to exhaust gas simultaneously, the cover sealing piece 100 according to the embodiment of the invention can be adopted on both the main bearing and the auxiliary bearing, and the main bearing and the auxiliary bearing can be respectively provided with an exhaust valve.

Other constructions and operations of the cover seal, the cover seal assembly, and the compressor according to embodiments of the present invention will be apparent to those of ordinary skill in the art and will not be described in detail herein.

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.

In the description herein, references to the description of the terms "embodiment," "example," etc., 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 without interference or contradiction.

Claims

1. The utility model provides a cap seal for compressor, its characterized in that, cap seal is suitable for to be established the axial one end of the cylinder of compressor is in order to seal the axial one end of the compression chamber of cylinder, cap seal have with the exhaust hole of compression chamber intercommunication, wherein, the entrance point in exhaust hole with the axial terminal surface of cylinder compression chamber and slip sheet in the removal process are followed the axial projection of cylinder has the overlap respectively, be equipped with the water conservancy diversion breach on the import border in exhaust hole, the water conservancy diversion breach with the compression chamber is followed the axial projection of cylinder has the overlap, the breach face of water conservancy diversion breach includes the edge the first face that the circumference in exhaust hole extends and connects the second face of the one end of first face, first face forms the curved surface.

2. The cover seal for a compressor of claim 1, wherein a projection of the flow guide notch along an axial direction of the cylinder is located within an axial projection of the compression chamber.

3. The cover seal for a compressor of claim 1, wherein the second face extends in an axial direction of the cylinder or obliquely to the axial direction of the cylinder.

4. The cover seal for a compressor of claim 3, wherein the relief surface of the flow guide relief further comprises a third surface connected to the other end of the first surface.

5. The cover seal for a compressor of claim 4, wherein the third face extends in an axial direction of the cylinder or obliquely to the axial direction of the cylinder.

6. The cover seal for a compressor of claim 1, wherein the flow guide notches are formed during casting of the cover seal or are formed by removing material after the cover seal is manufactured.

7. The cover seal for a compressor of any one of claims 1-6, wherein the cover seal is a bearing or a diaphragm.

8. A cover seal assembly for a compressor comprising a cover seal according to any one of claims 1 to 7 and a vent valve associated with the cover seal and located at the vent aperture to open and close the vent aperture.

9. A compressor comprising a cylinder and the closeout assembly of claim 8.