CN115467828A

CN115467828A - Rotary air compressor

Info

Publication number: CN115467828A
Application number: CN202211190813.2A
Authority: CN
Inventors: 马玉祥
Original assignee: Bengbu Yishan Compressor Manufacturing Co ltd
Current assignee: Bengbu Yishan Compressor Manufacturing Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-13

Abstract

The invention discloses a rotary air compressor, which relates to the technical field of compressor production and comprises an outer air cylinder, wherein end covers are arranged at two ends of the outer air cylinder, the end covers are connected with a rotating shaft, the rotating shaft is connected with an inner air cylinder, the inner air cylinder is connected with the outer air cylinder through blades, the rotating shaft is connected with an annular rotor eccentrically arranged with the rotating shaft, the blades penetrate through the side wall of the rotor, the rotor and the side surface of the blade form sliding fit, and the rotor slides along the side surface of the blade while rotating along with the rotating shaft; the inner wall of the outer cylinder, the blades, the outer wall of the rotor and the end cover form a first compression chamber, and the inner wall of the rotor, the blades, the outer wall of the inner cylinder and the end cover form a second compression chamber. The invention realizes the utilization of the internal space of the rotor by arranging the internal cylinder and the second compression chamber in the rotor, so that the compressor of the invention has two chambers for rotary compression; the air compression efficiency of the compressor is improved compared with that of the traditional rotary compressor, and the energy efficiency ratio of the compressor is improved.

Description

Rotary air compressor

Technical Field

The invention relates to the technical field of compressor production, in particular to a rotary air compressor.

Background

Most of the power consumption of the system is applied to the compressor in the process of gas compression, in recent years, in order to improve the energy consumption conversion of the compressor, optimization research on the structure of the compressor is carried out continuously so as to improve the performance of the compressor and reduce the power consumption ratio of the compressor, and the rotary compressor has the advantages that the size is small, the weight is light, the number of parts is small, the dynamic balance performance is good, and the like, which cannot be compared with the reciprocating piston compressor, and is widely applied to household and industrial production.

A compression cavity is formed between an air cylinder and an end cover of the existing rotary air compressor, the rotor moves to compress air, the effective volume of the compression cavity is limited by the rotor movement of the rotary air compressor, the effective volume of the compression cavity is small, the inner space of the rotor is not utilized, the energy efficiency ratio of the compressor is low, and the conversion efficiency is low.

Disclosure of Invention

The invention aims to provide a rotary air compressor, which solves the problems that the internal space of a rotor is not utilized, the energy consumption of the compressor is large, and the conversion efficiency is low.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a rotary air compressor, includes the outer cylinder, the end cover is installed respectively at the outer cylinder both ends, two the end cover rotates through the bearing and is connected with pivot, its characterized in that: the rotating shaft is rotatably connected with an inner cylinder between the end covers, the inner cylinder is connected with an outer cylinder through blades, cavities for storing compressed air are formed in the inner cylinder shell and the outer cylinder shell, and the cavities are communicated through the blades; the rotating shaft is positioned between the end covers and is also connected with an annular rotor eccentrically arranged with the rotating shaft, and the rotor is positioned between the inner cylinder and the outer cylinder; the blades penetrate through the side wall of the rotor, the side wall of the rotor is in sliding fit with the side surfaces of the blades, the rotor slides along the side surfaces of the blades while rotating along with the rotating shaft, the outer wall of the rotor is attached to the inner wall of the outer cylinder when the rotor rotates, and the inner wall of the rotor is attached to the outer wall of the inner cylinder; the inner wall of the outer cylinder, the blades, the outer wall of the rotor and the end cover form a first compression chamber, and the inner wall of the rotor, the blades, the outer wall of the inner cylinder and the end cover form a second compression chamber; the first compression chamber is communicated with a first air inlet and a first air outlet, and the second compression chamber is communicated with a second air inlet and a second air outlet.

As a still further scheme of the invention: the rotor slides along the two side faces of the blade through the arc sliding blocks, sliding grooves matched with the arc sliding blocks are formed in the side walls of the rotor, and the arc sliding blocks are in sliding fit with the sliding grooves and the two side faces of the blade.

As a still further scheme of the invention: and an oil storage tank is arranged on the surface of the arc sliding block.

As a still further scheme of the invention: a rotating wheel is arranged between the rotating shaft and the rotor, the rotating wheel is fixedly connected with the rotating shaft, and the outer side surface of the rotating wheel is connected with the inner side surface of the inward convex end of the annular rotor; the end surface of the rotating wheel and the end surface of the convex end of the rotor are attached to the end surface of one side of the inner cylinder.

As a still further scheme of the invention: the rotating shaft and the rotating wheel are integrally formed.

As a still further scheme of the invention: the inner cavity of the outer cylinder is coaxial with the rotating shaft; the rotor is coaxial with the runner.

As a still further scheme of the invention: the first air inlet is arranged on the outer cylinder, and the second air inlet is arranged on the rotor.

As a still further scheme of the invention: and the first air outlet and the second air outlet are both provided with one-way pressure air valves.

As a still further scheme of the invention: the outer cylinder, the inner cylinder and the blades are integrally formed.

As a still further scheme of the invention: the first compression chamber compression stroke is 180 ° out of phase with the second compression chamber compression stroke.

The invention has the beneficial effects that: the rotor is provided with the inner cylinder, the second compression chamber is arranged between the rotor and the inner cylinder, the inner space of the rotor is utilized, the outer cylinder and the inner cylinder are communicated and fixed through the blades, the side surfaces of the blades are in sliding fit with the rotor to help the rotor to slide during rotation to form rotary motion, and the compressor is provided with two rotary compression chambers; the air compression efficiency of the compressor is improved compared with that of the traditional rotary compressor, and the energy efficiency ratio of the compressor is improved.

Drawings

FIG. 1 is an exploded view of a rotary air compressor according to the present invention;

FIG. 2 is a schematic external view of a rotary air compressor according to the present invention;

FIG. 3 is a schematic view of the internal structure of a rotary air compressor according to the present invention;

FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic flow diagram illustrating the compression of gas in the compression chamber;

fig. 6 is a schematic structural view of the rotor and the slider.

10. An end cap; 21. an outer cylinder; 22. an inner cylinder; 23. a blade; 31. a rotating shaft; 32. a rotating wheel; 321. an outer side surface; 41. a rotor; 411. the inner side surface of the convex end; 412. a chute; 42. a circular arc slider; 421. an oil storage tank; 51. a first compression chamber; 52. a second compression chamber; 61. a first air inlet; 62. a second air inlet; 63. a first air outlet; 64. a second air outlet; 70. and a driving wheel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1-6, the present invention discloses a rotary air compressor, which comprises an outer cylinder 21, wherein two ends of the outer cylinder 21 are respectively provided with an end cover 10, the two end covers 10 are rotatably connected with a rotating shaft 31 through bearings, a part of the section of the rotating shaft 31 between the end covers 10 is rotatably connected with an inner cylinder 22, the inner cylinder 22 is connected with the outer cylinder 21 through a blade 23, the inner cylinder 22 and the outer cylinder 21 are both provided with a cavity for storing compressed air inside, and the cavities are communicated through the blade 23; the remaining section of the rotating shaft 31 between the end covers 10 is connected with an annular rotor 41 eccentrically arranged with the rotating shaft 31, the section of the annular rotor 41 is L-shaped, the convex end of the rotor 41 is connected with the rotating shaft 31, and the rotor 41 is positioned between the inner cylinder 22 and the outer cylinder 21; the blades 23 penetrate through the side wall of the rotor 41, the side wall of the rotor 41 is in sliding fit with the side surfaces of the blades 23, the rotor 41 slides along the side surfaces of the blades 23 while rotating along with the rotating shaft 31, the outer wall of the rotor 41 is attached to the inner wall of the outer cylinder 21 and the inner wall of the rotor 41 is attached to the outer wall of the inner cylinder 22 when the rotor 41 rotates; the inner wall of the outer cylinder 21, the blades 23, the outer wall of the rotor 41 and the end cover 10 form a first compression chamber 51, and the inner wall of the rotor 41, the blades 23, the outer wall of the inner cylinder 22 and the end cover 10 form a second compression chamber 52; the first compression chamber 51 communicates with the first inlet port 61 and the first outlet port 63, and the second compression chamber 52 communicates with the second inlet port 62 and the second outlet port 64.

The compressor body structure is mainly introduced in the invention, the driving device can be a motor or an internal combustion engine or other power devices, and the output power of the driving device is determined according to the displacement and the rotating speed of the air compressor. Cavities are arranged in the shells of the outer cylinder 21 and the inner cylinder 22 and communicated with each other, and compressed air is injected into the air storage device through the outer cylinder 21.

When the gas compressor is used, the rotating shaft 31 is driven by the driving wheel 70 to drive the rotor 41 to rotate, because the rotor 41 and the rotating shaft 31 are eccentrically arranged, the rotor 41 rotates and moves along the inner wall of the outer cylinder 21, meanwhile, the rotor 41 slides up and down along the blades 23, and the rotor 41 enables the volume of gas in the first compression chamber 51 to change repeatedly to form gas compression; at the same time, the rotation of the rotor 41 makes the inner wall of the rotor 41 rotate against the outer wall of the inner cylinder 22, so that the volume of the gas in the second compression chamber 52 changes repeatedly to compress the gas.

The operating principle is shown in fig. 5, where A, B, C and D in fig. 5 are the cases when the rotor 41 is rotated by 0 °, 90 °, 180 ° and 270 °, respectively, which substantially reflects a complete operating cycle experienced by the compressor from suction to discharge.

FIG. 5A: the gas in the second compression chamber 52 is sucked from the first compression chamber 51 through the second inlet port 62 in the rotor 41 while the suction and compression strokes of the first compression chamber 51 have been performed for a half stroke.

FIG. 5B: when the rotary shaft 31 rotates, the pressure in the first compression chamber 51 becomes higher than the discharge pressure, and the discharge process starts.

FIG. 5C: the discharge process of the first compression chamber 51 is finished and simultaneously the suction and compression strokes of the second compression chamber 52 have been performed for a half stroke.

FIG. 5D: when the rotary shaft 31 rotates, the pressure in the second compression chamber 52 becomes higher than the discharge pressure, and the discharge process starts.

As can be seen from fig. 5, when the rotor 41 revolves around the center line inside the outer cylinder 21, the rotor 41 also rotates around its own axis at the same time, and the rotor 41 is fitted to rotate by sliding the slider back and forth along the outer surface of the vane 23. The rotating shaft 31 rotates the rotor 41, then the rotor 41 drives the circular arc sliding block 42, and the outer surface of the rotor 41, the whole inner surface of the cylinder and the two end covers 10 form a closed space, namely a first compression chamber 51 of the compressor; the inner surface of the rotor 41, the entire outer surface of the inside cylinder 22 and the end cover 10 constitute a closed space, that is, a second compression chamber 52 of the compressor;

the first compression chamber 51 and the second compression chamber 52 appear crescent-shaped with the central vane 23 dividing the chambers into two chambers, the intake chamber and the compression chamber. As the rotor 41 rotates, the volume of the intake chamber increases and the volume of the compression chamber decreases. Intake and exhaust ports are provided on the outer and

inner cylinders

21 and 22 and the rotor 41, respectively. As the rotor 41 rotates, fresh outside air is continuously drawn into the intake chamber and the process slows down throughout the cycle: and the air in the compression chamber is compressed and its pressure is increased, when the gas pressure reaches a predetermined limit, the gas pushes open the pressure valve and flushes the unit to the outside, so that the exhaust process is intermittent, resulting in compression of the gas.

The most significant feature of the compressor of the present invention, as compared to conventional rotary air compressors, is the full utilization of the interior space of the rotor 41 as the internal working volume. The vane 23 is connected and fixed to the outer cylinder 21 and the inner cylinder 22 with a sliding fit between the rotor 41 and the vane 23 to facilitate the sliding of the rotor 41 during rotation to provide a rotational movement, and thus, the compressor of the present invention has two compression chambers. Compared with the traditional rotary compressor, the air compression efficiency of the compressor is improved, the energy consumption of the compressor is reduced, and the conversion efficiency is improved.

Further, the first air outlet 63 and the second air outlet 64 can be connected with the inner cavity of the cylinder through a one-way pressure air valve or a spring valve, preferably the one-way pressure air valve.

The middle of the blade 23 is provided with a cavity for connecting the inner cavities of the outer cylinder 21 and the inner cylinder 22, and the blade 23 also plays a supporting role in the inner cylinder 22; the vane 23 penetrates the side wall of the rotor 41, both side surfaces of the vane 23 are in sliding fit with the rotor 41, as shown in fig. 6, the sliding fit is preferably a circular arc slider 42, the flat surface side of the circular arc slider 42 is in sliding fit with the surface of the vane 23, and the curved surface side of the circular arc slider 42 is in sliding fit with the curved surface of the side wall of the rotor 41.

Preferably, as shown in fig. 6, an oil storage groove 421 is formed in the surface of the arc slider 42, and the sliding between the side wall of the rotor 41 and the vane 23 and the sliding between the side wall of the rotor 41 and the sliding groove 412 of the rotor 41 are made more smooth and more airtight by the lubricant oil stored in the oil storage groove 421, and the oil storage groove 421 is preferably provided in a plurality of ways in parallel along the longitudinal direction of the arc slider 42.

The rotating shaft 31 in the scheme can also be directly connected with the rotor 41, the rotating shaft 31 and the rotor 41 are integrally formed, and the rotating wheel 32 is not arranged between the rotating shaft 31 and the rotor 41, but the maintenance and the replacement of the rotor 41 after being worn are not facilitated.

Preferably, the runner 32 is installed between the rotating shaft 31 and the rotor 41, and the outer side surface 321 of the runner 32 is connected with the inner side surface 411 of the inward protruding end of the annular rotor 41; the end surface of the rotating wheel 32 and the end surface of the convex end of the rotor 41 are jointly attached to the end surface of one side of the inner cylinder 22, and the rotating wheel 32 is detachably connected with the rotor 41, so that the maintenance and the replacement of the rotor 41 are facilitated.

As shown in fig. 5, the rotation of the rotor 41 forms the compression stroke of the first compression chamber 51 and the compression stroke of the second compression chamber 52, and when the compression stroke of the first compression chamber 51 is 180 ° out of phase with the compression stroke of the second compression chamber 52, the two strokes are preferably connected, and the generation ratio of the compressed gas is large.

In the scheme, a rotating shaft 31 penetrates through an end cover 10, one end of the rotating shaft 31 is connected with a driving wheel 70, an oil seal and a dust seal are arranged between the rotating shaft 31, a bearing and the end cover 10, and the oil seal and the dust seal can keep a closed cavity in a cylinder and protect the bearing; can be connected through runner 32 between pivot 31 and the rotor 41, runner 32 is connected with multiple mode with pivot 31, can also split type connection by integrated into one piece, preferred integrated into one piece structure, runner 32 is connected more firmly difficult not hard up damage with pivot 31.

The axis of the inner cavity of the outer cylinder 21 is collinear with the axis of the rotating shaft 31; the axis of the rotor 41 is collinear with the axis of the rotor 32. The collinear axes are beneficial to the fitting degree of the inner cavity surface of the outer cylinder 21 and the outer wall of the rotor 41 and the inner wall of the rotor 41 and the outer wall of the inner cylinder 22, and the sealing performance of each divided cavity is better.

The first air inlet is arranged on the outer cylinder 21 and also on the end cover 10, and similarly, the second air inlet is arranged on the rotor 41 and also on the end cover 10, and the first air inlet and the second air outlet are respectively arranged on two sides of the blade 23.

In the scheme, the blades 23, the outer cylinder 21 and the inner cylinder 22 are designed integrally, so that the sealing fastening connection of the blades 23 with the inner wall of the outer cylinder 21 and the outer wall of the inner cylinder 22 can be better ensured, and two side ends of the blades 23 are in sealing fastening connection with the end surfaces of the end cover 10, the rotor 41 and the rotating wheel 32. The outer cylinder 21, the inner cylinder 22, the vanes 23 and the end cover 10, the rotor 41 and the runner 32 are closely fitted to each other and the compressor has fewer leakage paths.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a rotary air compressor, includes outer cylinder (21), end cover (10) are installed respectively to outer cylinder (21) both ends, two end cover (10) are connected with pivot (31), its characterized in that through the bearing rotation:

an inner cylinder (22) is connected to the rotating shaft (31) between the end covers (10) in a rotating mode, the inner cylinder (22) is connected with an outer cylinder (21) through blades (23), cavities for storing compressed air are formed in the shell of the inner cylinder (22) and the shell of the outer cylinder (21) respectively, and the cavities are communicated through the blades (23);

the rotating shaft (31) is positioned between the end covers (10) and is also connected with an annular rotor (41) eccentrically arranged with the rotating shaft (31), and the rotor (41) is positioned between the inner cylinder (22) and the outer cylinder (21);

the blades (23) penetrate through the side wall of the rotor (41), the side wall of the rotor (41) is in sliding fit with the side face of each blade (23), the rotor (41) slides along the side face of each blade (23) while rotating along with the rotating shaft (31), the outer wall of the rotor (41) is attached to the inner wall of the outer cylinder (21) and the inner wall of the rotor (41) is attached to the outer wall of the inner cylinder (22) when the rotor (41) rotates;

the inner wall of the outer cylinder (21), the blades (23), the outer wall of the rotor (41) and the end cover (10) form a first compression chamber (51), and the inner wall of the rotor (41), the blades (23), the outer wall of the inner cylinder (22) and the end cover (10) form a second compression chamber (52); the first compression chamber (51) is communicated with a first air inlet (61) and a first air outlet (63), and the second compression chamber (52) is communicated with a second air inlet (62) and a second air outlet (64).

2. The rotary air compressor as claimed in claim 1, wherein the rotor (41) slides along two side surfaces of the vane (23) through the arc sliding block (42), a sliding groove (412) matched with the arc sliding block (42) is formed in a side wall of the rotor (41), and the arc sliding block (42) is in sliding fit with the sliding groove (412) and the two side surfaces of the vane (23).

3. The rotary air compressor as claimed in claim 2, wherein an oil reservoir (421) is formed on the surface of the circular arc slider (42).

4. The rotary air compressor as claimed in claim 1, wherein a runner (32) is installed between the rotary shaft (31) and the rotor (41), the runner (32) is fixedly connected with the rotary shaft (31), an outer side surface (321) of the runner (32) is connected with an inner side surface (411) of an inward protruding end of the annular rotor (41); the end surface of the rotating wheel (32) and the end surface of the convex end of the rotor (41) are jointly attached to the end surface of one side of the inner cylinder (22).

5. A rotary air compressor according to claim 4, wherein the rotary shaft (31) and the rotary wheel (32) are integrally formed.

6. A rotary air compressor according to claim 4, wherein the outer cylinder (21) chamber is coaxial with the rotary shaft (31); the rotor (41) is coaxial with the runner (32).

7. A rotary air compressor as claimed in claim 1, wherein said first inlet port (61) is provided in the outer cylinder (21) and said second inlet port (62) is provided in the rotor (41).

8. A rotary air compressor as claimed in claim 1, wherein the first outlet port (63) and the second outlet port (64) are each provided with a one-way pressure gas valve.

9. The rotary air compressor as claimed in claim 1, wherein the outer cylinder (21), the inner cylinder (22) and the vane (23) are integrally formed.

10. A rotary air compressor as claimed in claim 1, wherein the compression stroke of the first compression chamber (51) is 180 ° out of phase with the compression stroke of the second compression chamber (52).