WO2021120984A1

WO2021120984A1 - Rotary double-cylinder air compression mechanism and double-cylinder single-air suction compressor

Info

Publication number: WO2021120984A1
Application number: PCT/CN2020/130569
Authority: WO
Inventors: 宋鹏杰; 麦应祥; 李华明
Original assignee: 广东美芝制冷设备有限公司
Priority date: 2019-12-17
Filing date: 2020-11-20
Publication date: 2021-06-24
Also published as: CN110925203A

Abstract

A rotary double-cylinder air compression mechanism and a double-cylinder single-air suction compressor. The rotary double-cylinder air compression mechanism comprises a first cylinder (100), a middle partition (200), and a second cylinder (300) which are arranged in sequence along a first direction; a first compression chamber (110) is formed in the first cylinder (100); the periphery of the first cylinder (100) is formed with an air suction hole (101) arranged along a second direction; an air inlet (102) arranged along the second direction and communicated with the air suction hole (101) is formed on the wall of the first compression chamber (110); an air outlet (103) communicated with the air inlet (102) is formed on the side surface of the first cylinder (100) in contact with the middle partition (200); on a cross section perpendicular to the first direction, the length of the air outlet (103) in the second direction is smaller than the length of the air outlet (103) in a direction perpendicular to the second direction; the second direction is perpendicular to the first direction. According to the rotary double-cylinder air compression mechanism, the reliability of insertion of a taper pipe on the air inlet is improved to avoid leakage of compressed air, and the mechanical strength of the first cylinder (100) in the circumferential direction is guaranteed.

Description

Rotary double-cylinder air compressor and double-cylinder single suction compressor

Technical field

This application belongs to the technical field of compressors, and in particular relates to a rotary double-cylinder air compressor and a double-cylinder single-suction compressor.

Background technique

In the related art, a dual-cylinder single-suction compressor has two cylinders. Generally, suction holes are designed on both cylinders. At the same time, there are two suction pipes on the accumulator, which are respectively connected to the two cylinders. In order to reduce the cost, the cost can be reduced by reducing the suction holes and the suction holes are arranged on the central partition. However, it is well known that in the double-cylinder and double-suction structure, the thickness of the central partition is much smaller than the thickness of the cylinder. Therefore, if the suction holes are arranged on the central partition, the central partition must be thickened. In this way, on the one hand, there is limited room for cost reduction, and more importantly, the height of the entire compression structure will increase. This change will deteriorate the reliability of the compression structure.

Therefore, in order to improve the above situation, as shown in Figures 1 and 2, the double-cylinder single-intake air suction hole 101' can be provided on the cylinder 100'. Specifically, in the double-cylinder single-intake structure, the two cylinders are respectively The first cylinder and the second cylinder, and the first cylinder 100' has an intake hole 102' connected to the intake hole 101'. In this way, thickening of the middle partition is avoided, thereby well solving the above-mentioned problems. At the same time, the hole leading to the second cylinder is the outlet hole 103'.

Normally, during the assembly process, the reservoir is connected to the compression mechanism through a tapered tube. The minimum requirement for the depth of the sealed tapered tube inserted into the suction hole 101' is C. For the first cylinder, due to the setting of the outlet hole 103', the depth of the tapered tube inserted into the suction hole 101' is reduced, then the tapered The reliability of the pipe insertion at the intake hole is reduced, and the tapered pipe is easy to loosen at the suction hole 101', causing gas leakage; at the same time, the mechanical strength of the cylinder in the circumferential direction is insufficient.

technical problem

One of the objectives of the embodiments of the present application is to provide a rotary dual-cylinder air compressor, which aims to solve the problem of poor connection reliability at the intake port of the cylinder connected to the accumulator in a dual-cylinder single-suction compressor and the The problem of insufficient mechanical strength in the circumferential direction.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

This application is realized as follows:

A rotary double-cylinder air compressor includes a first cylinder, a central partition plate and a second cylinder arranged in sequence along a first direction. The first cylinder is provided with a first compression chamber, and the first cylinder is provided on its outer periphery. There is a suction hole opened along the second direction, the first compression chamber is provided with an inlet hole opened along the second direction and communicated with the suction hole on its cavity wall, and the first cylinder is connected to the An air outlet hole connected to the air inlet hole is opened on the side surface where the middle partition plate is attached; on a cross section perpendicular to the first direction, the hole length of the air outlet hole in the second direction is smaller than the hole length of the air outlet hole in the second direction. The length of the air outlet hole in the second direction perpendicular to the second direction; the central partition plate is provided with a through-hole air guide hole, the second cylinder is provided with a second compression chamber, and the air guide hole is used to connect the air outlet hole to In the second compression cavity, the second direction is perpendicular to the first direction.

Optionally, the ratio of the hole length of the air outlet hole in the second direction to the hole length of the air outlet hole perpendicular to the second direction is 1.1-1.4.

Optionally, the opening direction of the vent hole is the third direction, the starting point is the center point of the vent hole and the straight line arranged along the third direction and set away from the direction of the central partition is the first straight line, and the starting point The straight line that is the center point of the vent hole and is arranged along the second direction and set away from the first compression cavity is a second straight line, and the angle formed between the first straight line and the second straight line is an acute angle .

Optionally, an angle formed between a straight line arranged along the third direction and a direction away from the central partition and a straight line arranged along the second direction and away from the first compression cavity is 25-45 °.

Optionally, the hole shape of the air outlet hole is an ellipse.

Optionally, the air outlet has a racetrack shape composed of two oppositely arranged and parallel straight line segments and an arc segment connected between the two ends of the two straight line segments, and the distance between the two straight line segments is less than two The maximum distance between the line segments of the arc.

Optionally, the air guide hole is a through hole structure penetratingly arranged along the first direction.

Optionally, the axis of the air guide hole is inclined from the periphery of the central partition to the center in the direction in which the first cylinder points to the second cylinder.

Optionally, the second cylinder is provided with an oblique through hole, one end of the oblique through hole communicates with the air guide hole, and the other end communicates with the second compression chamber. The axis of the oblique through hole is connected to the air guide hole. The axes are parallel.

Optionally, the included angle between the axis of the oblique through hole and the axis of the second cylinder is greater than the included angle between the axis of the air guide hole and the axis of the second cylinder.

Optionally, the first compression cavity is a through hole structure penetratingly arranged along the first direction; the second compression cavity is a through hole structure penetratingly arranged along the first direction.

The application also provides a dual-cylinder single-suction compressor, which includes the above-mentioned rotary dual-cylinder air compressor.

The rotary double-cylinder air pressure mechanism sets the double-cylinder single-intake suction hole on the cylinder to avoid thickening the middle partition. At the same time, the length of the outlet hole in the second direction is smaller than that of the outlet hole in the vertical direction. The hole length in the second direction can increase the size of n+t when the hole-shaped area of the vent hole in the prior art is the same. In specific settings, compared with the structure of the prior art, it can ensure that n≥C. , It can also ensure that t≥d/10, where n≥C, can improve the reliability of the tapered tube plugging at the air inlet hole, prevent the tapered tube from loosening at the air inlet hole, thereby avoiding compressed gas leakage, and To ensure t≥d/10, the mechanical strength of the first cylinder in the circumferential direction is ensured.

It can be seen from the above that the structure is simple and does not increase the manufacturing cost. At the same time, the rotary two-cylinder air compressor can improve the reliability of the insertion of the intake pipe at the suction hole to avoid the leakage of compressed gas, and Ensure the mechanical strength of the first cylinder in the circumferential direction.

Beneficial effect

The beneficial effect of the rotary double-cylinder air compressor provided by the embodiment of the present application is that the rotary double-cylinder air compressor has the double-cylinder single-intake air suction hole on the cylinder, which avoids thickening the central partition, and At the same time, the pore length of the vent hole in the second direction is smaller than the pore length of the vent hole perpendicular to the second direction. When the hole shape area of the vent hole is the same as that of the prior art, the size of n+t can be increased. In the specific setting, compared with the structure of the prior art, it can ensure that n≥C and t≥d/10 at the same time, wherein, ensuring n≥C can improve the reliability of the tapered tube plugging at the air inlet. Prevent the tapered tube from loosening at the intake hole, thereby avoiding compressed gas leakage, and ensuring that t≥d/10 ensures the mechanical strength of the first cylinder in the circumferential direction.

It can be seen from the above that the structure is simple and does not increase the manufacturing cost. At the same time, the rotary two-cylinder air compressor can improve the reliability of the insertion of the intake pipe at the suction hole to avoid compressed gas leakage, and Ensure the mechanical strength of the first cylinder in the circumferential direction.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a bottom view of a cylinder with a suction hole in a rotary double-cylinder air compressor in the prior art;

Figure 2 is a cross-sectional view in the direction of AA in Figure 1;

Figure 3 is a cross-sectional view of an embodiment of the rotary double-cylinder air compressor provided by the present application;

4 is a bottom view of the first cylinder in another embodiment of the rotary double-cylinder air compressor provided by the present application;

Fig. 5 is a cross-sectional view in the direction of BB in Fig. 4.

Attached drawings 1 and 2 label description:

标号 Label	名称 name	标号 Label	名称 name
100＇ 100'	气缸 cylinder	To	To
101＇ 101'	吸气孔 Suction hole	102＇ 102'	进气孔 Air inlet
103＇ 103'	出气孔 Vent	To	To

Description of labels in Figures 2 to 5:

标号 Label	名称 name	标号 Label	名称 name
100 100	第一气缸 First cylinder	To	To
110 110	第一压缩腔 First compression chamber	To	To
101 101	吸气孔 Suction hole	102 102	进气孔 Air inlet
103 103	出气孔 Vent	To	To
200 200	中隔板 Middle partition	201 201	导气孔 Air guide hole
300 300	第二气缸 Second cylinder	To	To
310 310	第二压缩腔 Second compression chamber	320 320	斜通孔 Inclined through hole

Embodiments of the present invention

In order to make the purpose, technical solutions, and advantages of this application clearer and clearer, the following further describes the application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

The embodiment of the application provides a rotary double-cylinder air compressor.

Referring to FIGS. 3 to 4, the rotary double-cylinder air compressor includes a first cylinder 100, a central partition 200, and a second cylinder 300 that are sequentially arranged along a first direction.

It should be noted here that, in the specific use process of the double-cylinder air-pressure pump body, it also includes other structural components that are not related to the application point of this application, such as the first bearing, the first crankshaft matched with the A first piston connected to the crankshaft and located in the first cylinder 100, a second bearing, a second crankshaft mated with the second bearing, and a second piston connected to the second crankshaft and located in the second cylinder 300, etc., here They are not listed one by one, and these structures are not shown in the drawings.

It should be noted here that the first direction can be from top to bottom. At this time, the first cylinder 100, the central partition 200, and the second cylinder 300 are arranged in sequence from top to bottom. At this time, the double-cylinder air compressor The pump body is vertical, and the first direction can also be from left to right. The first cylinder 100, the central partition 200 and the second cylinder 300 are arranged from left to right. At this time, the double-cylinder pneumatic pump body is horizontal. formula.

The first cylinder 100 is provided with a first compression chamber 110, and the first cylinder 100 is provided with a suction hole 101 along the second direction on its outer periphery. The suction hole 101 is used for inserting the intake pipe connected to the accumulator to make The gas passing through the accumulator can enter the rotary double-cylinder air pressure mechanism through the suction hole 101. The first compression chamber 110 is provided with an air inlet 102 on its cavity wall which is opened along the second direction and communicates with the suction hole 101. The first cylinder 100 is opened on the side surface which is attached to the central partition 200 and communicates with the air inlet. 102, the gas outlet hole 103, so that the gas sucked in at the suction hole 101 flows to the gas inlet hole 102 and the gas outlet hole 103 respectively, wherein the gas flowing to the gas inlet hole 102 will enter the first compression chamber 110 and flow to the gas outlet hole 103 The gas will enter the second cylinder 300. Wherein, the second direction is perpendicular to the first direction.

On the cross section perpendicular to the first direction, the hole length of the outlet hole 103 in the second direction is smaller than the hole length of the outlet hole 103 in the second direction. For details, please refer to FIG. 2. In the prior art, the outlet hole 103 The shape of the end face of the first cylinder 100' is an ellipse, L1 is the length of the major axis of the ellipse, and L2 is the length of the minor axis of the ellipse. If L1 is too large, n≥C cannot be guaranteed, resulting in insufficient connection strength between the first cylinder and the external intake pipe; or t≥d/10 cannot be guaranteed, and the mechanical strength of the first cylinder 100 in the circumferential direction is insufficient; or both Neither can meet the requirements.

Among them, C is the minimum requirement for the depth of the sealing tapered tube inserted into the suction hole 101', n is the shortest distance from the suction hole 101' to the outer wall surface of the first cylinder 100', and t is the suction hole 101' to the first cylinder 100 'The closest distance to the inner wall surface, d is the aperture of the air inlet 102'.

Based on the arrangement of the vent hole 103 structure of this embodiment, the size of n+t can be increased when the hole shape area of the vent hole 103' in the prior art is the same. While ensuring n≥C, it can also ensure t≥d/10, where n≥C can improve the reliability of the insertion of the intake pipe at the suction hole 101 and prevent the intake pipe from loosening at the suction hole 101. Therefore, the leakage of compressed gas is avoided, and t≥d/10 is ensured, and the mechanical strength of the first cylinder 100 in the circumferential direction is ensured.

The central partition 200 is provided with an air guide hole 201 extending through it in the first direction. The second cylinder 300 is provided with a second compression chamber 310. The air guide hole 201 is used to connect the air outlet 103 to the second compression chamber 310, so that the flow direction The gas in the air hole 103 will enter the second compression chamber 310 through the air guide hole 201.

It should be noted here that C is the minimum requirement for the depth of the sealing tapered tube inserted into the suction hole 101, n is the closest distance from the outlet hole 103 to the outer wall of the first cylinder 100, and t is the outlet hole 103 to the inside of the first cylinder 100. The closest distance to the wall, d is the diameter of the air inlet 102.

The rotary double-cylinder air compressor has the double-cylinder single-suction suction hole 101 on the cylinder, which avoids thickening the middle partition 200. At the same time, the hole length of the outlet hole 103 in the second direction is smaller than that of the outlet hole. The hole length of 103 in the second direction perpendicular to the second direction is the same as the hole shape area of the prior art vent hole 103', and the size of n+t can be increased. In specific settings, compared with the prior art structure, the size of n+t can be increased. While ensuring n≥C, it can also ensure t≥d/10, where n≥C can improve the plugging reliability of the tapered tube at the air inlet 102 and prevent the tapered tube from loosening at the air inlet 102 , Thereby avoiding compressed gas leakage, and ensuring that t≥d/10 ensures the mechanical strength of the first cylinder 100 in the circumferential direction.

It can be seen from the above that the structure is simple and does not increase the manufacturing cost. At the same time, the rotary double-cylinder air compressor can improve the reliability of the insertion of the intake pipe at the suction hole 101 to avoid compressed gas leakage. And the mechanical strength of the first cylinder 100 in the circumferential direction is ensured.

Preferably, the ratio of the hole length of the air outlet hole 103 in the second direction to the hole length of the air outlet hole 103 in the second direction is 1.1-1.4.

Please refer to FIG. 5, in an embodiment of the present application, a rotary dual-cylinder air pressure mechanism is provided. The opening direction of the outlet hole 103 is the third direction, and the starting point is the center point of the outlet hole and arranged along the third direction and away from the center. The straight line set in the direction of the partition 200 is the first straight line, the starting point is the center point of the air outlet and the straight line arranged in the second direction and away from the first compression chamber 110 is the second straight line, between the first straight line and the second straight line The formed angle is an acute angle, that is, the outlet hole 103 and the suction hole 101 are not perpendicular. In this way, the turning angle of the gas flowing to the air outlet 103 is reduced, thereby avoiding reducing the decrease in the flow rate of the gas at the air outlet 103, that is, reducing the flow rate loss, thereby helping to ensure the compression efficiency of the rotary double-cylinder air compressor. Improve the compression energy efficiency of the rotary double-cylinder air compressor.

Further, the opening direction of the air outlet 103 is the third direction, and the angle formed between the straight line arranged in the third direction and away from the direction of the central partition 200 and the straight line arranged in the second direction and away from the first compression chamber 110 It is 25-45°.

In an embodiment of the present application, a rotary double-cylinder air compressor is provided. The hole wall of the outlet hole 103 is a smooth wall surface, and the hole wall of the outlet hole 103 does not have a corner structure, which prevents airflow from flowing through the outlet hole 103. Flow rate.

Referring to FIG. 4, in an embodiment of the present application, a rotary double-cylinder air compressor is provided, and the hole shape of the air outlet 103 is an ellipse.

In an embodiment of the present application, a rotary double-cylinder air compressor is provided, and the air outlet 103 is composed of two oppositely arranged and parallel straight line segments and an arc segment connected between the two ends of the two straight line segments. Racetrack shape, the distance between two straight line segments is less than the maximum distance between two arc line segments.

In an embodiment of the present application, a rotary dual-cylinder air compressor is provided, and the air guide hole 201 is a through-hole structure arranged in a first direction. In the actual production process, it is beneficial to simplify the manufacturing difficulty of the middle partition 200 , Thereby helping to reduce production and manufacturing costs.

Further, the axis of the air guide hole 301 is inclined from the periphery of the central partition 200 to the center in the direction in which the first cylinder 100 points to the second cylinder 300, so as to reduce the flow loss of the airflow.

In an embodiment of the present application, a rotary double-cylinder air compressor is provided. The second cylinder 300 is provided with an oblique through hole 320. One end of the oblique through hole 320 is connected to the air guide hole 201, and the other end is connected to the second compression chamber 310. The axis of the oblique through hole 320 is parallel to the axis of the air guide hole 201, that is, the oblique through hole 320 is not perpendicular to the air guide hole 201, so as to reduce the flow loss of the air flow and improve the compression energy efficiency ratio.

In an embodiment of the present application, a rotary dual-cylinder air compressor is provided, and the included angle between the axis of the oblique through hole 320 and the axis of the second cylinder 300 is greater than the included angle between the axis of the air guide hole and the axis of the second cylinder 300 , That is, the oblique through hole and the air guide hole 201 are not perpendicular to reduce the flow loss of the air flow and improve the compression energy efficiency ratio.

In an embodiment of the present application, a rotary double-cylinder air compressor is provided, and the first compression chamber 110 is a through hole structure arranged in a first direction. In the actual production process, it is beneficial to simplify the production of the first cylinder 100. Difficulty in manufacturing, which helps to reduce production and manufacturing costs.

In an embodiment of the present application, a rotary dual-cylinder air compressor is provided, and the second compression chamber 310 is a through hole structure arranged in a first direction. In the actual production process, it is beneficial to simplify the production of the second cylinder 300. Difficulty in manufacturing, which helps to reduce production and manufacturing costs.

In one embodiment of the present application, a dual-cylinder single-suction compressor is improved. The dual-cylinder single-suction compression mechanism includes a rotary double-cylinder air compressor. For the specific structure of the rotary double-cylinder air compressor, refer to the above-mentioned implementation. For example, since the rotary double-cylinder air compressor adopts all the technical solutions of all the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

In the implementation of this application, the inner diameter of the first cylinder 100 and the second cylinder 300 are both D, and the outer diameter of the dual-cylinder single-suction compressor is D0, and D/D0≥0.42.

In the embodiment of the present application, the ratio of the hole length of the outlet hole 103 in the second direction to the hole length of the outlet hole 103 in the second direction is 1.1-1.4.

The above are only optional embodiments of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

A rotary double-cylinder air compressor, which is characterized in that it comprises a first cylinder, a central partition plate and a second cylinder arranged in sequence along a first direction. The first cylinder is provided with a first compression chamber, and the first cylinder The outer periphery of the first compression chamber is provided with a suction hole opened in a second direction, and the first compression chamber is provided with an inlet hole opened in the second direction and communicated with the suction hole on the cavity wall of the first compression chamber. An air cylinder is provided with an outlet hole connected to the air inlet hole on the side surface adhering to the middle partition plate; on a cross section perpendicular to the first direction, the air outlet hole is a hole in the second direction The length is smaller than the hole length of the outlet hole perpendicular to the second direction; the middle partition plate is provided with a through-hole air guide hole, the second cylinder is provided with a second compression chamber, and the air guide hole is used to The air outlet is connected to the second compression chamber, and the second direction is perpendicular to the first direction.
The rotary dual-cylinder air compressor according to claim 1, wherein the hole length of the air outlet hole in the second direction is different from the hole length of the air outlet hole in the second direction perpendicular to the second direction. The ratio is 1.1-1.4.
The rotary double-cylinder air compressor according to claim 1, wherein the opening direction of the air outlet is a third direction, and the starting point is the center point of the air outlet and is arranged along the third direction and away from it. The straight line set in the direction of the partition plate is the first straight line, the starting point is the center point of the outlet hole and the straight line arranged along the second direction and set away from the first compression cavity is the second straight line. The angle formed between the straight line and the second straight line is an acute angle.
The rotary double-cylinder air compressor according to claim 3, wherein a straight line arranged along the third direction and away from the direction of the central partition is arranged along the second direction and away from the first The angle formed between the straight lines of a compression cavity is 25-45°.
The rotary double-cylinder air compressor according to claim 1, wherein the hole shape of the air outlet hole is an ellipse.
The rotary dual-cylinder air compressor according to claim 1, wherein the air outlet is formed by two oppositely arranged and parallel straight sections and an arc connected between the two ends of the straight sections In the racetrack shape formed by the segments, the distance between the two straight line segments is smaller than the maximum distance between the two arcs.
The rotary dual-cylinder air compressor according to claim 1, wherein the air guide hole is a through hole structure penetratingly arranged along the first direction.
The rotary dual-cylinder air compressor according to claim 1, wherein the axis of the air guide hole is inclined from the periphery of the central partition to the center in the direction in which the first cylinder points to the second cylinder .
The rotary dual-cylinder air compressor according to claim 8, wherein the second cylinder is provided with an oblique through hole, one end of the oblique through hole is connected to the air guide hole, and the other end is connected to the second In the compression chamber, the axis of the oblique through hole is parallel to the axis of the air guide hole.
The rotary dual-cylinder air compressor according to claim 8, wherein the included angle between the axis of the oblique through hole and the axis of the second cylinder is larger than the axis of the air guide hole and the axis of the second cylinder. The included angle of the axis.
The rotary dual-cylinder air compressor according to claim 1, wherein the first compression chamber is a through hole structure penetratingly arranged along the first direction; and the second compression chamber is along the first direction. A through-hole structure penetrating in one direction.
A dual-cylinder single-suction compressor, characterized by comprising the rotary dual-cylinder air compressor as claimed in claim 1.