WO2020155923A1

WO2020155923A1 - Rotor type compression component, compressor, and air conditioning device

Info

Publication number: WO2020155923A1
Application number: PCT/CN2019/127248
Authority: WO
Inventors: 庄希平; 林国富; 郑贺
Original assignee: 宁波甬微集团有限公司
Priority date: 2019-01-31
Filing date: 2019-12-21
Publication date: 2020-08-06
Also published as: KR102489151B1; KR20210125993A; JP2022518158A; CN109667758A

Abstract

A sliding vane component, a rotor type compression component comprising the sliding vane component, and a compressor. The sliding vane component comprises a sliding vane (1) and a connection member (10) for connecting the sliding vane (1) to a piston (2). One end of the connection member (10) is connected to the sliding vane (1) in an oscillating manner, and the other end of the connection member (10) is connected to the piston (2) in an oscillating manner.

Description

Rotor type compression assembly, compressor and air conditioning equipment

Technical field

The invention belongs to the technical field of compressors, and specifically relates to a sliding vane assembly, a rotor-type compression assembly, a compressor, and air conditioning equipment.

Background technique

Rotary compressors are widely used due to their high efficiency, compact structure, small size and light weight, such as the interior of household air conditioners.

Compression components are an important part of a rotary compressor. Compression components mainly include cylinders, pistons, sliding vanes and crankshafts. The piston is located inside the cylinder and is sleeved on the crankshaft along the axial direction of the crankshaft. The cylinder is provided with a spring hole and a sliding vane groove, and a spring is arranged in the spring hole. The sliding vane is placed in the sliding vane groove and the shape is adapted to the sliding vane groove. The end of the sliding vane can compress the spring and the sliding vane can be in the sliding vane groove. Move in the radial direction of the cylinder. When the compression mechanism is working, the head of the sliding vane is always in close contact with the piston under the force of the spring at the tail end to form a dynamic seal. The inside of the cylinder is divided into a suction cavity and a compression cavity. Driven by the crankshaft, the suction and The process of compression and exhaust.

The existing cylinders are all irregular in shape, and the cross section perpendicular to the axial direction is a circular ring part plus a convex part, and the axial direction refers to a direction parallel to the axial direction of the crankshaft. For example, as shown in Figure 1, the compressor cylinder 3 includes a circular ring portion and a convex portion 5. The sliding plate 1, the piston 2 and the eccentric portion of the crankshaft are accommodated in the circular ring, and the convex portion 5 is used to set a spring hole 7. With spring 6.

This kind of compression component has the following problems:

(1) Due to the irregular shape of the cylinder, it can only be manufactured by casting or welding with high cost and low efficiency;

(2) A spring hole needs to be provided on the cylinder, and a convex part must be added to accommodate the spring and the spring hole structure. Not only increases the amount of raw materials used, but also increases the processing procedures, which complicates the processing technology and increases the production cost and processing difficulty of the cylinder;

(3) Due to the existence of the spring, on the one hand, part of the energy of the compression assembly is inevitably used to overcome the spring force and cause energy loss; on the other hand, the spring itself has a fatigue life limit. When there is a problem with the spring life, it will Directly cause compressor failure;

(4) In this assembly, the sliding vane and the piston are in direct contact to form dual friction. The friction and wear of the sliding vane tip and the outer diameter of the piston cannot be avoided during operation, and this wear will increase with the increase of the compressor working cycle, which is serious. Affect the relative tightness and service life of the compressor.

To this end, a structure for hingedly connecting the piston and the sliding plate is proposed. The outer peripheral wall of the piston is provided with an axially penetrating groove. The sliding plate has a head end and a tail end. The shape of the head end matches the groove. It is oscillatingly fitted in the groove to form a hinged connection between the sliding piece and the piston. For example, the cross-sectional shape of the sliding vane disclosed in the Chinese patent document with the application number CN89202761.4 is a composite of a rectangular and a round head end. A circular hole that matches the shape of the cylindrical head end of the sliding vane is provided on the piston. When opening, the sliding plate and the piston are connected in a hinged manner.

Although this hinged structure of the piston and the sliding plate can improve the friction and wear of the sliding plate and the piston, the following problems still exist:

(1) The shape of the cylinder has not changed, but it is still a ring part plus a convex part, and the shape is irregular, which does not solve the current problems of material waste and complex processing procedures;

(2) The shape of the sliding plate in this structure is complicated, and the head end of the cylindrical structure is connected to the rear plane part. Because the sliding vane itself requires ultra-high surface accuracy and strength to meet the air tightness of the compressor, this type of sliding vane is either to process the cylindrical structure or plane separately, or to process the entire surface at one time, using the existing The manufacturing process cannot meet the requirements of large-scale batch precision manufacturing, and it is not realistically feasible.

Summary of the invention

In view of the foregoing technical status, the present invention provides a sliding vane assembly including a sliding vane, characterized in that the sliding vane assembly further includes a connecting piece for connecting the sliding vane and the piston;

One end of the sliding plate is provided with a second groove axially penetrating in a direction parallel to the axial direction of the piston;

The other end of the sliding plate is matched with the sliding plate guide groove provided on the cylinder, and can move along the radial direction of the cylinder in the sliding plate guide groove;

One end of the connecting piece is provided with a second protrusion adapted to the second groove, and the second protrusion is fitted into the second groove so that the connecting piece and the sliding The pieces can be connected swingably;

The other end of the connecting piece is provided with a first protrusion that matches the first groove axially through the outer peripheral wall of the piston, and the first protrusion can be fitted into the first groove to make The connecting member is swingably connected with the piston.

Preferably, the cross section of the first groove is an open first arc. In order to improve the restriction of the piston to the connecting member, the width of the opening is smaller than the diameter of the first arc.

Preferably, the cross section of the second groove is an open second arc. In order to improve the restriction of the sliding sheet on the connecting member, the width of the opening is smaller than the diameter of the second arc.

The present invention also provides a rotor-type compression assembly comprising the above-mentioned sliding vane assembly, which further includes a cylinder and a piston. The cylinder is provided with a sliding vane guide groove, and the sliding vane is placed in the sliding vane guide groove and can be edged in the sliding vane guide groove. The radial movement of the cylinder; the outer circumferential wall of the piston is provided with an axially penetrating first groove, the first groove is matched with the first protrusion on the connecting piece, and the first protrusion can be fitted In the first groove, so that the connecting member and the piston are swingably connected.

The axial direction refers to a direction parallel to the axial direction of the crankshaft.

Preferably, the cylinder has a circular ring shape along a cross section perpendicular to the axial direction.

Preferably, the cylinder is also provided with a hole communicating with the outside of the cylinder, which can be used to suck in or discharge gas from the cylinder, or to inject liquid into the cylinder.

The present invention also provides a method for preparing the compression assembly, which includes the following steps:

The steps of making the cylinder;

The steps of making the piston;

The steps of making the sliding sheet;

The steps of making the connecting piece.

Preferably, the method further includes inserting the first protrusion of the connecting piece into the first groove in the axial direction, inserting the second protrusion of the connecting piece into the second groove, and inserting the sliding piece into the sliding piece guide groove. A step of.

The manufacturing process of the cylinder is not limited. Preferably, the cylinder is manufactured by using a pipe, such as a steel pipe or a cast pipe.

As an implementation, the method for manufacturing the cylinder includes the following steps:

(1) Cut the pipe along the axial direction to the required cylinder height;

(2) Carry out rough machining on the pipe obtained in step (1) to process a structural unit on the cylinder, the structural unit including sliding vane grooves, suction holes and other structures;

(3) Perform finishing to obtain the cylinder.

As another implementation manner, the manufacturing method of the cylinder includes the following steps:

(1) Prepare cylinder blanks by casting;

(2) Performing rough machining on the cylinder blank obtained in step (1) to process structural units on the cylinder, the structural units including sliding vane grooves, suction holes and other structures;

(3) Perform finishing to obtain the cylinder.

The manufacturing process of the connecting member is not limited. As a preference, it is formed by precision cold drawing or precision cold drawing, which specifically includes the following steps:

(1) Prepare steel; prepare molds according to the connecting parts;

(2) Using precision cold drawing or precision cold drawing process to pass the steel through the mold to make the connecting piece blank;

(3) Cutting the connecting piece blank according to the height of the sliding plate and the piston to obtain the connecting piece.

In order to improve the accuracy of the cut surface, in the step (3), the cut surface is ground.

The manufacturing process of the piston is not limited. As a manufacturing process, the piston body is first manufactured, and then the first groove is manufactured on the piston body. In this manufacturing process, the method of manufacturing the first groove is not limited, and preferably includes the following steps:

(1) Drilling: Drilling a hole near the outer circumference of the piston body, and the hole penetrates the piston body in the axial direction;

(2) Reaming and honing: reaming in the hole obtained in step (1), and then honing to make the surface of the hole reach the specified accuracy;

(3) Grinding: Grinding is carried out along the outer diameter of the piston body until a part of the hole is ground off to obtain the piston with the first groove.

The manufacturing process of the sliding sheet is not limited. As a manufacturing process, the slide body is first manufactured, and then a second groove is formed on the slide body. In this manufacturing process, the method for manufacturing the second groove is not limited. As a preference, the method for preparing the needle roller groove in patent document CN103953547A can be used, which specifically includes the following steps:

(1) Drilling: Drill a hole at one end of the slide body, and the hole penetrates the slide body in the axial direction;

(3) Cutting: cutting the hole obtained in step (2), the cutting line direction is parallel to the axial direction, and a part of the hole is cut to obtain the sliding sheet with the second groove.

Preferably, the step of inserting the first protrusion of the connector into the first groove in the axial direction, and inserting the second protrusion of the connector into the second groove.

Compared with the prior art, the present invention has the following advantages:

(1) In the present invention, the cross-section of the cylinder is circular and has a regular shape, which can further reduce the manufacturing cost and manufacturing difficulty. The pipes can be used to produce the required cylinders through cutting, slotting, punching and other processes, thus greatly reducing the production cost of the cylinder, simplifying the production process, and enabling large-scale production;

(2) In the present invention, the sliding plate and the piston are connected together by a connecting piece, rather than by the action of the spring force. Therefore, on the one hand, when the compression assembly works, no additional energy is needed to overcome the spring force, and energy loss is avoided. , Thereby greatly improving the energy conversion rate of the compression assembly; on the other hand, there is no need to set spring holes and springs in the cylinder, which greatly reduces the thickness of the cylinder and reduces the manufacturing cost and difficulty of the cylinder;

(3) In the present invention, a connecting piece is arranged between the sliding plate and the piston to realize the articulation form. The sliding piece, the piston and the connecting piece are independent of each other. The two ends of the connecting piece are convex parts. The sliding piece and the piston are respectively provided with grooves along the axial direction. When the two ends of the connecting piece are respectively fitted in the two grooves, the sliding piece , The piston and the connecting piece form a combined component, which makes the sliding plate and the piston form an articulation. The piston is driven by an eccentric crankshaft in the cylinder to make a circular motion. Under the action of the connecting piece, the sliding plate is driven to move back and forth.

(4) In the present invention, the sliding plate, the piston and the connecting member are independent of each other, and can be independently manufactured, and the process is simple. The connecting piece can be processed and formed by cold drawing or cold drawing, which greatly simplifies the process and can be produced in batches. Pistons and sliding vanes can make full use of the existing manufacturing process and be manufactured according to actual structural requirements and accuracy requirements. As an implementation form, the piston body and the sliding plate body can be produced first, and then the piston with the first groove is obtained by drilling, reaming, honing and grinding, and the belt is obtained by drilling, reaming, honing and cutting. Slider with second groove.

(5) In the present invention, since the spring setting is eliminated, the sliding plate does not need to be equipped with a specially designed tail groove structure to cooperate with the spring compression, which simplifies the processing technology; at the same time, the length of the sliding plate can be reduced correspondingly, saving materials, Reduce production costs.

That is, the compression assembly of the present invention has a simple structure, a simple manufacturing process, can reduce production costs, can be produced in a large-scale and precise manner, can improve energy conversion efficiency, can be used in a rotor compressor, and has a wide range of application prospects in air conditioning equipment .

Description of the drawings

Fig. 1 is a schematic diagram of the structure of an existing compression assembly.

Fig. 2 is a schematic diagram of the structure of the compression assembly in embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of the structure of the combined part formed by the sliding plate, the piston and the connecting piece in FIG. 2.

Fig. 4 is a schematic diagram of the structure of each part of the combined component of Fig. 3.

Fig. 5 is an enlarged view of the piston in Fig. 2.

Fig. 6 is an enlarged view of the sliding plate in Fig. 2.

Figure 7 is a schematic diagram of the manufacturing process of the piston in Example 1 of the present invention.

Fig. 8 is a schematic diagram of drilling a hole on the sliding plate body in Embodiment 1 of the present invention.

Fig. 9 is a cross-sectional structure diagram of the sliding plate body in Fig. 8 and a cross-sectional structure diagram of the sliding plate obtained after cutting.

Fig. 10 is a schematic cross-sectional view of the die hole in Example 1 of the present invention, and a schematic view of the axial side view of the obtained connector.

Figure 11 is a schematic diagram of the manufacturing process of the cylinder in Example 1 of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments. It should be pointed out that the following embodiments are intended to facilitate the understanding of the present invention and do not have any limiting effect on it.

Sliding vane 1, piston 2, cylinder 3, protrusion 5, spring 6, spring hole 7, sliding vane groove 8, hole 9, connecting piece 10, first groove 11, second groove 12, first protrusion 13. The second protrusion 14, the first arc 15, the opening portion 16, the second arc 17, the opening portion 18, the sliding vane body 19, the piston body 20, the hole 21, the hole 22, the die hole 23, and the steel pipe 24.

Example 1:

As shown in Figure 2, the rotor compression assembly includes a sliding vane 1, a piston 2 and a cylinder 3. The cylinder 3 has a circular ring shape along the section perpendicular to the axial direction. The cylinder 3 is provided with a sliding vane guide groove, namely the sliding vane groove 8. The sliding vane 1 is placed in the sliding vane groove and can move in the axial direction in the sliding vane groove. . The cylinder is also provided with a hole 9 communicating with the outside of the cylinder, which can be used to suck in or discharge gas from the cylinder, or to inject liquid into the cylinder.

The piston 2 is inside the cylinder 3 and is sleeved on the crankshaft along the axial direction of the crankshaft. As shown in Figure 3, the sliding plate 1, the piston 2 and the connecting piece 3 form a combined component. As shown in Fig. 4, the outer peripheral wall of the piston 2 is provided with a first groove 11 which penetrates in the axial direction. One end of the sliding sheet 1 is provided with a second groove 12 extending axially therethrough. Both ends of the connecting member 10 are respectively provided with protrusions, that is, one end of the connecting member is provided with a first protrusion 13 and the other end is provided with a second protrusion 14. The sliding vane 1 and the piston 2 form a dynamic seal through the connecting piece 3, which divides the inside of the cylinder into a suction cavity and a compression cavity. Driven by the crankshaft, the process of suction, compression and exhaust is completed.

The shape of the first protrusion 13 matches the first groove 11 and is swayably fitted in the first groove. The shape of the second protrusion 14 matches the second groove 12, and is swayably fitted in the second groove.

As shown in FIG. 5, the cross section of the first groove 11 is an open first arc 15, and the width of the opening portion 16 is smaller than the diameter of the first arc 15. As shown in FIG. 6, the cross section of the second groove 12 is an open second arc 17, and the width of the opening portion 18 is smaller than the diameter of the second arc 17.

In this embodiment, the production of the compression component includes the following processes:

As shown in Figure a in Figure 7, the piston body 20 is made, and then a first groove is made on the piston body, as follows:

(1) Drilling: As shown in Figure a in Figure 7, drill a hole at a position close to the outer circumference of the piston body 20, and the hole 21 penetrates the piston body 20 in the axial direction;

(2) Reaming and honing: Reaming in the hole 21, and then honing to make the hole surface reach the specified accuracy;

(3) Grinding: Grinding is performed along the outer diameter of the piston body 20 until a part of the hole 21 is ground away to obtain the piston with the first groove as shown in Figure b in Figure 5.

As shown in Fig. 8 and Fig. 9 a, the slide body 19 is made, and then a second groove is made at one end of the slide body 19, as follows:

(1) Drilling: As shown in Fig. 8, a hole 22 is drilled along one end of the sliding plate body 19, and the hole 22 penetrates the sliding plate body 19 in the axial direction;

(2) Reaming and honing: Reaming in the hole 22 and then honing to make the surface of the hole 22 reach the specified accuracy;

(3) Cutting: Cut the hole 22 obtained in step (2) with the direction of the cutting line parallel to the axial direction, and cut off a part of the hole 22, as shown in Figure 9 b, to obtain the second groove Slide.

The connecting parts are processed and formed by precision cold drawing or precision cold drawing at one time, as follows:

(1) Choose a suitable steel; prepare a mold according to the connector 10, and the cross-section of the die hole 23 is shown in Figure 10 a, that is, the inner wall of the die hole 23 is consistent with the shape of the connector 10;

(2) Using precision cold drawing or precision cold drawing process to pass the steel through the die hole 23 to make the connecting piece blank;

(3) The blank is cut according to the axial length of the sliding plate and the piston to obtain the connecting piece, the axial side of which is shown in Figure 10 b.

(4) Grind the cut surface in step (3).

Insert the first protrusion of the connecting piece prepared above into the first groove of the piston prepared above in the axial direction, and insert the second protrusion into the second groove of the sliding plate prepared above, then the sliding plate It is hinged with the piston.

As shown in Figure 11, make cylinder 3 as follows:

(1) The steel pipe 24 is used, and the steel pipe is cut in the axial direction to the height of the cylinder 3;

(2) The steel pipe cut in step (1) is rough-processed, and the sliding blade groove is processed by a broaching machine, and then punched to obtain the sliding blade groove 8 and the hole 9 structure;

(3) Finishing the rough-machined part obtained in step (2) to obtain the cylinder 3.

Example 2:

In this embodiment, the structure of the rotor-type compression assembly is the same as that of embodiment 1, and its preparation process is basically the same as that of embodiment 1, except that the preparation process of cylinder 3 is as follows:

(1) Prepare cylinder blanks by casting;

(2) Rough machining is performed on the cylinder blank obtained in step (1) to process the sliding vane groove 8 and the hole 9 structure;

(3) Perform finishing to obtain the cylinder.

The above-mentioned embodiments describe the technical solutions of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Anything done within the principle scope of the present invention Any modification, supplement or substitution in a similar manner shall be included in the protection scope of the present invention.

Claims

A sliding plate assembly comprising a sliding plate (1), characterized in that the sliding plate assembly further comprises a connecting piece (10) for connecting the sliding plate (1) and the piston (2);

One end of the sliding piece (1) is provided with a second groove (12) axially penetrating in a direction parallel to the axial direction of the piston;

The other end of the sliding piece (1) is matched with the sliding piece guide groove provided on the cylinder, and can move along the radial direction of the cylinder in the sliding piece guide groove;

One end of the connecting piece (10) is provided with a second protrusion (14) that matches the second groove (12), and the second protrusion (14) is fitted into the second groove (12), so that the connecting piece (10) and the sliding plate (1) are connected swingably;

The other end of the connecting piece (10) is provided with a first protrusion (13) that is matched with a first groove (11) axially through the outer peripheral wall of the piston (2). (13) It can be fitted into the first groove (11), so that the connecting piece (10) and the piston (2) can be connected swingably.
The sliding plate assembly according to claim 1, wherein the cross section of the first groove (11) is an open first arc.
The sliding vane assembly of claim 2, wherein the width of the opening is smaller than the diameter of the first arc.
The sliding plate assembly according to claim 1, wherein the cross section of the second groove (12) is an open second arc.
The sliding vane assembly of claim 4, wherein the width of the opening is smaller than the diameter of the second arc.
A rotor type compression assembly comprising the sliding vane assembly according to any one of claims 1-5, further comprising a cylinder (3) and a piston (2), characterized in that,

The cylinder (3) is provided with a sliding vane guide groove, that is, a sliding vane groove (8), and the opposite end of the sliding vane (1) and the second groove (12) is placed in the sliding vane groove (8). ), can move along the radial direction of the cylinder (3) in the sliding vane groove (8);

The outer peripheral wall of the piston (2) is provided with a first groove (11) penetrating in the axial direction thereof, and the first groove (11) and the first protrusion (13) on the connecting piece (10) Correspondingly, the first protrusion (13) can be fitted into the first groove (11), so that the connecting piece (10) and the piston (2) can be connected swingably.
The rotor compression assembly according to claim 6, characterized in that the cylinder (3) has a circular ring shape along a section perpendicular to the axial direction.
The rotor-type compression assembly according to claim 6 or 7, characterized in that the cylinder (3) is also provided with a hole communicating with the outside of the cylinder.
The manufacturing method of the rotor type compression assembly according to any one of claims 6 to 8, characterized in that it comprises the following steps:

The steps of making the cylinder (3);

The steps of making the piston (2);

The steps of making the sliding sheet (1); and

Steps of making connector (10).
The manufacturing method of the rotor type compression assembly according to claim 9, further comprising inserting the first protrusion of the connecting member into the first groove in the axial direction, and inserting the second protrusion of the connecting member into the first groove. The step of the second groove.
9. The method for manufacturing a rotor-type compression assembly according to claim 9, wherein the connecting member is formed by a cold-drawn or cold-drawn process.
The manufacturing method of the rotor type compression assembly according to claim 9, characterized in that, the manufacturing of the connecting member (10) comprises the following steps:

(1) Prepare steel; prepare molds according to the connecting piece (10);

(2) Using precision cold drawing or precision cold drawing process to pass the steel through the mold to make the connecting piece (10) blank;

(3) Cutting the blank according to the height of the sliding plate (1) and the piston (2) to obtain the connecting piece (10).
The method for manufacturing a rotor-type compression assembly according to claim 12, wherein, preferably, in the step (3), the cut surface is ground.
The manufacturing method of the rotor compression assembly according to claim 9, characterized in that, the manufacturing process of the piston (2) is: first manufacturing the piston (2) body, and then manufacturing the first piston (2) body on the piston (2) body. Groove (11).
The manufacturing method of the rotor-type compression assembly according to claim 11, wherein the manufacturing of the first groove (11) comprises the following steps:

(1) Drill a hole at a position close to the outer circumference of the body of the piston (2), and the hole penetrates the body of the piston (2) in the axial direction;

(2) Reaming the hole obtained in step (1), and then honing to make the surface of the hole reach the specified accuracy;

(3) Grind the outer diameter of the body of the piston (2) until a part of the hole is ground away to obtain the first groove (11).
The manufacturing method of the rotor type compression assembly according to claim 9, characterized in that, the manufacturing process of the sliding plate (1) is: first manufacturing the sliding plate (1) body, and then manufacturing the second sliding plate on the sliding plate body. Groove (12).
The manufacturing method of the rotor-type compression assembly according to claim 16, wherein the manufacturing of the second groove (12) comprises the following steps:

(1) Drill a hole at one end of the sliding plate (1) body, and the hole penetrates the sliding plate body in the axial direction;

(2) Reaming the hole obtained in step (1), and then honing to make the surface of the hole reach the specified accuracy;

(3) The hole obtained in step (2) is cut, the cutting direction is parallel to the axial direction, and a part of the hole is cut to obtain the second groove (12).
The manufacturing method of the rotor-type compression assembly according to claim 9, characterized in that the cylinder (3) is made of pipe material.
The manufacturing method of the rotor compression assembly according to claim 18, wherein the manufacturing method of the cylinder (3) comprises the following steps:

(1) Cut the pipe along the axial direction to the required cylinder (3) height;

(2) Carry out rough machining on the tube obtained in step (1) to process a structural unit on the cylinder (3), the structural unit including a sliding vane groove (8);

(3) Perform finishing to obtain the cylinder (3).
The manufacturing method of the rotor type compression assembly according to claim 9, wherein the manufacturing method of the cylinder (3) comprises the following steps:

(1) Use casting method to prepare cylinder blank;

(2) Perform rough machining on the blank obtained in step (1) to process a structural unit on the cylinder, the structural unit including a sliding vane groove (8);

(3) Perform finishing to obtain the cylinder (3).
A rotor compressor characterized by comprising the compression assembly according to any one of claims 6 to 8.
An air-conditioning device, characterized by comprising the rotor compressor according to claim 21.