阅读说明：本技术 一种转缸活塞压缩机 (Rotary cylinder piston compressor ) 是由 何志龙 孙崇洲 韦炜 李丹童 胡汪锋 王嘉辰 于 2020-12-29 设计创作，主要内容包括：一种转缸活塞压缩机,包括缸套以及设置在缸套两端的上支撑板和阀盖,阀盖的内侧设有阀板,阀板与缸套以及上支撑板围成腔体,腔体内部设有旋转部件,阀盖的外侧设有转轴轴承,转轴穿过转轴轴承带动旋转部件旋转；旋转部件包括活塞连杆,活塞连杆套设在转缸内的气缸壁面上,活塞连杆的两端设有能够沿缸套的内壁面进行滚动的滚针轴承,转缸套设在转轴上；转缸的两侧对称设置气缸端盖,气缸端盖上开设有进排气口；转缸带动活塞连杆相对于缸套旋转,同时活塞连杆相对于转缸作往复运动,实现转缸内部活塞连杆两侧容积的变化,从而实现吸气、压缩和排气。本发明减少了易损件,简化了压缩机结构,活塞的整体受力小,运转平稳,增加了压缩机的可靠性。(A rotary cylinder piston compressor comprises a cylinder sleeve, an upper support plate and a valve cover, wherein the upper support plate and the valve cover are arranged at two ends of the cylinder sleeve; the rotary part comprises a piston connecting rod, the piston connecting rod is sleeved on the wall surface of a cylinder in the rotary cylinder, two ends of the piston connecting rod are provided with needle roller bearings capable of rolling along the inner wall surface of the cylinder sleeve, and the rotary cylinder is sleeved on the rotary shaft; the two sides of the rotating cylinder are symmetrically provided with cylinder end covers, and the cylinder end covers are provided with air inlet and air outlet ports; the rotary cylinder drives the piston connecting rod to rotate relative to the cylinder sleeve, and the piston connecting rod reciprocates relative to the rotary cylinder, so that the change of the volumes of two sides of the piston connecting rod in the rotary cylinder is realized, and air suction, compression and exhaust are realized. The invention reduces wearing parts, simplifies the structure of the compressor, has small integral stress of the piston, operates stably and increases the reliability of the compressor.)

1. A rotary cylinder piston compressor is characterized in that: the rotary valve comprises a cylinder sleeve (3), an upper supporting plate (11) and a valve cover (4) which are arranged at two ends of the cylinder sleeve (3), wherein a valve plate (12) is arranged on the inner side of the valve cover (4), the valve plate (12), the cylinder sleeve (3) and the upper supporting plate (11) enclose a cavity, a rotary part (2) is arranged in the cavity, a rotary shaft bearing (5) is arranged on the outer side of the valve cover (4), and a rotary shaft (6) penetrates through the rotary shaft bearing (5) to drive the rotary part (2) to rotate; the rotating part (2) comprises a piston connecting rod (21), the piston connecting rod (21) is sleeved on a cylinder wall surface (22b) in the rotating cylinder (22), needle roller bearings (26) capable of rolling along the inner wall surface of the cylinder sleeve (3) are arranged at two ends of the piston connecting rod (21), and the rotating cylinder (22) is sleeved on the rotating shaft (6); the two sides of the rotary cylinder (22) are symmetrically provided with cylinder end covers (20), and the cylinder end covers (20) are provided with air inlet and outlet ports (28); the rotary cylinder (22) drives the piston connecting rod (21) to rotate relative to the cylinder sleeve (3), and meanwhile, the piston connecting rod (21) reciprocates relative to the rotary cylinder (22), so that the change of the volumes of two sides of the piston connecting rod (21) in the rotary cylinder (22) is realized, and air suction, compression and exhaust are realized.

2. The rotary cylinder piston compressor as claimed in claim 1, wherein: the cylinder sleeve is characterized by having a preset section, wherein a plane of symmetry of the cylinder sleeve (3) passing through the axis of the rotating shaft (6) is a first section, a plane passing through the axis of the rotating shaft (6) and perpendicular to the first section is called a second section, and when the axis direction of the piston is located in the second section, the piston just moves to half of a stroke.

3. The rotary cylinder piston compressor as claimed in claim 2, wherein: a baffle plate (24) is arranged between the rotary cylinder (22) and the cylinder end cover (20), a sealing ring (23) is arranged between the side wall of the rotary cylinder (22) and the baffle plate (24), and the baffle plate (24) is opened corresponding to the air inlet and outlet (28); the symmetry plane of the rotary cylinder radial hole (22c) in the horizontal direction is a third section, the inlet position is arranged below the third section and close to the position of a cylinder wall surface (22b), the outlet direction of the air inlet and outlet port (28) is arranged to be downward along the axial direction of the rotating shaft (6), and the air inlet and outlet channel extends from the air inlet and outlet port (28) to one side of the valve plate (12) in the cylinder end cover (20).

4. A rotary cylinder piston compressor according to claim 3, wherein: the planes of the end parts at the two sides of the piston are provided with bosses (29) which are matched with the air inlet and outlet (28), and when the axis of the piston connecting rod (21) is positioned on the first section, the bosses (29) are inserted into the air inlet and outlet (28); the cylinder end cover (20) is provided with reciprocating shaft sealing parts at the side close to the baffle plate (24), the reciprocating shaft sealing parts are arranged at the upper side and the lower side of the part of the piston connecting rod (21) extending out of the cylinder end cover (20), and each reciprocating shaft sealing part comprises a support ring (27) and a reciprocating sealing ring (25).

5. The rotary cylinder piston compressor as claimed in claim 1, wherein: two ends of the piston connecting rod (21) are provided with bearing brackets (212), and the needle roller bearing (26) is connected to the bearing brackets (212) through a bearing shaft (211).

6. The revolving cylinder piston compressor according to claim 5, characterized in that the two bearing shafts (211) are arranged symmetrically at both ends of the piston connecting rod (21), and the distance between the axes of the two bearing shafts (211) is l₁The diameter of the needle bearing (26) is d₀Radius of rotary cylinder is r, eccentricity isThe molded line of the inner wall surface of the cylinder sleeve (3) is as follows:

the polar coordinate equation of the motion track C of the central axis of the needle bearing (26) is

Shifting the polar coordinate equation outwards at equal intervals by the amount ofThe curve obtained thereby is the contour of the inner wall surface of the cylinder liner (3).

7. A rotary cylinder piston compressor according to claim 6 wherein the parametric equation for the curve is as follows:

8. rotary-cylinder piston compressor according to claim 6, characterized in that the diameter d of the needle bearings (26)₀Satisfy the requirement ofWherein r is_θThe radius of curvature of any point on the profile line of the inner wall surface of the cylinder sleeve (3) satisfies the following relational expression:

9. the rotary cylinder piston compressor as claimed in claim 1, wherein:

go up backup pad (11) and valve plate (12) carry out spacing cooperation to two up-and-down terminal surfaces of changeing jar (22) respectively, go up backup pad (11) and valve plate (12) center and set up the circular port in order to reduce the friction surface, still set up friction ring (210) alone between valve plate (12) and commentaries on classics jar (22) in order to avoid valve plate (12) and change direct friction between jar (22).

10. The rotary cylinder piston compressor as claimed in claim 1, wherein:

the valve cover (4) is respectively provided with an air inlet cavity (43), a primary exhaust cavity (42) and a secondary exhaust cavity (41); the air inlet cavity (43) is matched with the valve plate (12) to ensure that the compressor fully inhales air, the first-stage exhaust cavity (42) and the second-stage exhaust cavity (41) have the same volume, and the two stages of exhaust cavities are connected through a cylindrical channel to play the roles of exhausting, eliminating noise and buffering.

Technical Field

The invention belongs to the field of compressors, and particularly relates to a rotary cylinder piston compressor.

Background

The rotary cylinder compressor is a new type displacement compressor. The rotary motion of the piston relative to the cylinder sleeve realizes the reciprocating motion of the piston relative to the rotary cylinder; the reciprocating motion of the piston relative to the rotary cylinder realizes the periodic change of the volume of the working cavity; the air inlet and outlet holes on the cylinder end cover are periodically communicated with the air suction channel and the air outlet channel of the valve plate in the rotating process of the rotary cylinder; the above composite motion realizes the processes of air suction, compression and air exhaust of the compressor. The traditional piston compressor needs to be provided with an air inlet valve, an exhaust valve and a crank slider structural part, so that a plurality of easily damaged parts are arranged, and the structure is complex; the traditional rotary cylinder compressor has large friction surface and large piston stress.

With the progress of society, higher requirements are put forward on the high efficiency and energy conservation of the compressor. Therefore, the rotary cylinder compressor needs to be optimally designed so as to further improve the efficiency of the compressor and realize energy conservation and emission reduction.

Disclosure of Invention

The invention aims to solve the problems of large stress and serious friction of a piston in the rotary cylinder piston compressor in the prior art, and provides the rotary cylinder piston compressor which can effectively improve the overall efficiency of the rotary cylinder piston compressor.

In order to achieve the purpose, the invention provides a rotary cylinder piston compressor which has the following technical scheme: the rotary valve comprises a cylinder sleeve, an upper supporting plate and a valve cover, wherein the upper supporting plate and the valve cover are arranged at two ends of the cylinder sleeve; the rotary part comprises a piston connecting rod, the piston connecting rod is sleeved on the wall surface of a cylinder in the rotary cylinder, two ends of the piston connecting rod are provided with needle roller bearings capable of rolling along the inner wall surface of the cylinder sleeve, and the rotary cylinder is sleeved on the rotary shaft; the two sides of the rotating cylinder are symmetrically provided with cylinder end covers, and the cylinder end covers are provided with air inlet and air outlet ports; the rotary cylinder drives the piston connecting rod to rotate relative to the cylinder sleeve, and the piston connecting rod reciprocates relative to the rotary cylinder, so that the change of the volumes of two sides of the piston connecting rod in the rotary cylinder is realized, and air suction, compression and exhaust are realized.

Preferably, the compressor has a preset section, the symmetry plane of the cylinder sleeve passing through the axis of the rotating shaft is a first section, the plane passing through the axis of the rotating shaft and perpendicular to the first section is called a second section, and when the axis direction of the piston is located in the second section, the piston moves to just half of the stroke.

Preferably, a baffle is arranged between the rotary cylinder and the cylinder end cover, a sealing ring is arranged between the side wall of the rotary cylinder and the baffle, and the baffle corresponds to an opening at the position of the air inlet and outlet; the symmetry plane of the radial hole of the rotary cylinder in the horizontal direction is a third section, the inlet position is arranged below the third section and close to the wall surface of the cylinder, the outlet direction of the air inlet and outlet is arranged to be downward along the axial direction of the rotary shaft, and the air inlet and outlet channel extends to one side of the valve plate from the air inlet and outlet in the cylinder end cover.

Preferably, the planes of the end parts at the two sides of the piston are provided with bosses which are matched with the air inlet and outlet, and when the axis of the piston connecting rod is positioned on the first section, the bosses are inserted into the air inlet and outlet; the cylinder end cover is provided with reciprocating shaft sealing parts at the side close to the separation blade, the reciprocating shaft sealing parts are arranged at the upper side and the lower side of the part of the piston connecting rod extending out of the cylinder end cover and comprise support rings and reciprocating sealing rings.

Preferably, bearing brackets are arranged at two ends of the piston connecting rod, and the needle roller bearing is connected to the bearing brackets through a bearing shaft.

Preferably, the two bearing shafts are symmetrically arranged at two ends of the piston connecting rod, and the distance between the axes of the two bearing shafts is l₁The diameter of the needle bearing is d₀Radius of rotary cylinder is r, eccentricity isThe molded line of the inner wall surface of the cylinder sleeve is as follows:

the polar coordinate equation of the motion track C of the central axis of the needle bearing is

Shifting the polar coordinate equation outwards at equal intervals by the amount ofThe curve obtained thereby is the contour of the liner inner wall surface.

Preferably, the parametric equation for the curve is as follows:

preferably, the diameter d of the needle bearing₀Satisfy the requirement ofWherein r is_θThe radius of curvature of any point on the profile line of the inner wall surface of the cylinder sleeve satisfies the following relational expression:

preferably, last backup pad and valve plate carry out spacing cooperation to two up-and-down terminal surfaces of changeing the jar respectively, go up backup pad and valve plate center and set up the circular port in order to reduce the friction surface, still set up the friction ring alone between valve plate and commentaries on classics jar in order to avoid the direct friction between valve plate and the commentaries on classics jar.

Preferably, the valve cover is respectively provided with an air inlet cavity, a primary exhaust cavity and a secondary exhaust cavity; the air inlet cavity is matched with the valve plate to ensure that the compressor fully inhales air, the first-stage exhaust cavity and the second-stage exhaust cavity have the same volume, and the two stages of exhaust cavities are connected through a cylindrical channel to play the roles of exhausting, silencing and buffering.

Compared with the prior art, the invention has the following beneficial effects:

when the compressor operates, the rotating cylinder and the cylinder end cover are driven to rotate through the rotating shaft, the rotating cylinder drives the piston connecting rod to rotate, the piston connecting rod rotates relative to the cylinder sleeve and does reciprocating motion relative to the rotating cylinder simultaneously to achieve air suction, compression and exhaust, and the compressor structure does not need to be specially provided with an air inlet and exhaust valve, reduces wearing parts, simplifies the compressor structure and increases the reliability of the compressor. The needle roller bearings are positioned at two sides of the piston connecting rod and roll on the inner wall surface of the cylinder sleeve, so that the friction surface of the compressor structure is small, and the friction power consumption is low. In the structure of the rotary cylinder piston compressor, the piston part mainly bears gas force, partial rotating moment for driving the piston rotor to rotate, reciprocating inertia force and centrifugal force, the whole stress of the piston is small, the operation is stable, and the reliability of the compressor is improved.

Furthermore, the end face of the rotary cylinder is sealed by a sealing ring, and meanwhile, a reciprocating shaft sealing element is arranged on the side, close to the rotary cylinder, of the cylinder end cover, so that static sealing of the working cavity is achieved, and leakage is reduced. The end planes of the two sides of the piston are provided with bosses for reducing the relative clearance volume of the compressor, thereby improving the comprehensive efficiency of the compressor and further improving the performance of the compressor.

Drawings

FIG. 1 is an exploded view of the rotary piston compressor of the present invention;

FIG. 2 is a schematic cross-sectional view of a rotary cylinder piston compressor according to the present invention;

FIG. 3 is a schematic view showing the structure of the rotating parts of the rotary cylinder piston compressor according to the present invention;

FIG. 4 is a schematic view of a baffle structure of the rotary piston compressor of the present invention;

FIG. 5 is a schematic view of the valve plate structure of the rotary cylinder piston compressor of the present invention;

FIG. 6 is a schematic view of the valve cover structure of the rotary piston compressor of the present invention;

FIG. 7 is a schematic view of the structure of the rotary shaft of the rotary cylinder piston compressor of the present invention;

FIG. 8 is a side view of the rotary cylinder structure of the rotary cylinder piston compressor of the present invention;

FIG. 9 is a three-dimensional view of the rotary cylinder structure of the rotary cylinder piston compressor of the present invention;

FIG. 10 is a sectional view of the cylinder head cover structure of the rotary piston compressor of the present invention;

FIG. 11 is a top view of the cylinder liner structure of the rotary piston compressor of the present invention;

FIG. 12 is a schematic view of a piston rod with labyrinth seal according to the present invention;

in the drawings: 11-an upper support plate; 12-a valve plate; 2-a rotating member; 20-cylinder end cover; 20 a-end cap through hole; 21-a piston rod; 22-rotating the cylinder; 23-a sealing ring; 24-a baffle plate; 25-reciprocating sealing ring; 26-needle roller bearings; 27-a support ring; 28-air inlet and outlet; 29-boss; 210-a friction ring; 211-a bearing shaft; 212-a bearing support; 22 a-a working chamber; 22 b-cylinder wall; 22 c-radial holes; 22 d-axial bore; 3-cylinder sleeve; 4-valve cover; 41-secondary exhaust cavity; 42-primary exhaust chamber; 43-an air inlet cavity; 5-a rotating shaft bearing; 6-rotating shaft.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A rotary cylinder piston compressor comprises an upper supporting plate 11, a valve plate 12, a rotating component 2, a cylinder sleeve 3, a valve cover 4 and a rotating shaft 6, wherein the rotating component 2 comprises a piston connecting rod 21, a rotary cylinder 22, a sealing ring 23, a baffle 24, a reciprocating sealing ring 25, a needle bearing 26, a supporting ring 27, an air inlet and outlet 28, a boss 29, a friction ring 210, a bearing shaft 211 and a bearing support 212. The rotating cylinder 22 is sleeved on the rotating shaft 6, the piston connecting rod 21 is sleeved on a cylinder wall surface 22b arranged in the rotating cylinder 22, the piston connecting rod 21, the bearing shaft 211 and the bearing bracket 212 are in an integral structure, the needle roller bearings 26 respectively arranged at two sides roll on the inner wall surface of the cylinder sleeve 3, and the cylinder end cover 20, the baffle plate 24, the sealing ring 23, the supporting plate 11 and the reciprocating sealing ring 25 are symmetrically arranged at two sides of the rotating cylinder 22.

In this example, the upper support plate 11, the cylinder sleeve 3, the valve plate 12, the valve cover 4, and the rotary shaft bearing 5 are fixed in this order from top to bottom, and the rotary member 2 and the rotary shaft 6 rotate in the space shown in the figure. When the compressor structure operates, the rotating shaft 6 drives the rotating part 2 to rotate, the rotating cylinder 22 drives the piston connecting rod 21 to rotate relative to the cylinder sleeve 3, and meanwhile, the piston connecting rod 21 reciprocates relative to the rotating cylinder 22, so that the change of the volumes of two sides of the piston connecting rod 21 in the rotating cylinder 22 is realized, and air suction, compression and exhaust are realized.

In the present embodiment, the rotary cylinder 22 has an axial hole 22d disposed along the axial direction thereof and a radial hole 22c disposed along the radial direction thereof, wherein the axial hole 22d is used for penetrating the rotary shaft 6, the radial hole 22c is used for penetrating the piston connecting rod 21, the radial hole 22c is a working chamber 22a of the compressor structure of the present embodiment, and the hole wall surface is a cylinder wall surface 22b of the compressor structure. In operation of the compressor structure, the piston rod 21 is rotated by the rotary cylinder 22 through cooperation with the radial hole 22c, and the piston rod 21 reciprocates in the radial hole 22c relative to the rotary cylinder 22 to perform suction, compression and discharge.

In this example, the compressor has a preset cross section, the symmetry plane of the cylinder sleeve 3 passing through the axis of the rotating shaft 6 is called a first cross section A1, the plane passing through the axis of the rotating shaft 6 and perpendicular to the first cross section A1 is called a second cross section A2, when the axial direction of the piston connecting rod 21 is located in the first cross section A1, the piston connecting rod 21 just moves to a side dead center position, and when the axial direction of the piston connecting rod 21 is located in the second cross section A2, the piston connecting rod 21 just moves half of the stroke of the piston section. The symmetry plane of the cylinder radial bore 22c in the horizontal direction is referred to as the third section a 3.

In this example, a stopper 24 is provided between the rotary cylinder 22 and the cylinder head cover 20 to form a sealing surface with the seal ring 23, and the rotary cylinder 22, the stopper 24, and the cylinder head cover 20 are fastened by bolts. The baffle plate 24 and the cylinder end cover 20 are provided with an air inlet and outlet 28, the inlet position is set to be a position close to the cylinder wall surface 22b below the third section A3 so as to reduce the relative clearance volume, the outlet direction of the air inlet and outlet 28 is set to be downward along the axial direction of the rotating shaft 6, and an air inlet and outlet channel extends from the air inlet and outlet 28 to one side of the valve plate 12 in the cylinder end cover 20. When the air inlet and outlet port 28 is communicated with the air inlet of the valve plate 12, the compressor sucks air, and when the air inlet and outlet port 28 is communicated with the air outlet of the valve plate, the compressor exhausts air, so that the air suction and exhaust processes of the compressor structure are realized.

In the present embodiment, the distance between the axes of the two bearing shafts 211 symmetrical in the axial direction of the working chamber 22a is l₁Needle bearing 26 diameter d₀Radius of rotary cylinder is r, eccentricity isThe molded line of the inner wall surface of the cylinder liner 3 is obtained as follows:

when the compressor structure is in operation, the polar coordinate equation of the motion track C of the central axis of the needle bearing 26 is as followsIn general, takeEnsuring that the trajectory C is free of sharp points and kinks. By the parameter limitation, the processing and assembling precision of different parts of the compressor structure can be ensured, and good operation can be realized. Further, the molded line is subjected to outward equidistant offset with the offset ofThe curve obtained from the calculation is the molded line of the inner wall surface of the cylinder sleeve 3, and the specific calculation process is as follows:

through simple coordinate system conversion, the parameter equation of the obtained track C is as follows:

requirement C to deflect outwardMoving deviceAssuming that a point P on C has the coordinate of (x)₀,y₀) And P point coordinate parameters meet the C parameter equation. Assuming that the coordinate of a point P 'on the trajectory C' after the deviation is (x, y), the following expression is obtained:

whereinFind outThenIs completely determined, its coordinate is P₁And (4) obtaining the coordinate of the point so as to obtain a parameter equation of C'.

In the vectorIn (1), knownLet C be the unit vector of the normal at point PThen:

order toη_x、η_yAre respectively unit normal vectorThe components in the x, y directions, the parametric equation for C' can be expressed as:

the equation is the molded line parameter equation of the inner wall surface of the cylinder sleeve 3.

In the present embodiment, the diameter d of the needle bearing₀Should satisfyWherein r is_θThe radius of curvature of any point on the profile of the cylinder liner 3, which enables the needle roller bearing to roll continuously on the cylinder liner 3, can be expressed by the following relation:

in the present embodiment, as shown in fig. 3, the two ends of the piston connecting rod 21 are provided with the bosses 29 which are matched with the air inlet and outlet 28, and when the axis of the piston connecting rod 21 is located at the first section a1, the bosses 29 are inserted into the air inlet and outlet 28 to reduce the relative clearance volume of the compressor. The clearance between the cylindrical surface of the piston rod 21 and the cylinder wall surface 22b is ensured to have a certain sealing performance, and the internal leakage between the high-pressure chamber and the low-pressure chamber is reduced. The cylinder end cover 20 is arranged along the axial direction of a cylinder wall surface 22b and is provided with an end cover through hole 20a, the piston connecting rod 21 penetrates through the cylinder end cover and reciprocates relative to the cylinder wall surface 22b, and the cylinder end cover 20 is arranged on the side close to the baffle plate 24 and is provided with a reciprocating shaft sealing element which comprises a supporting ring 27 and a reciprocating sealing ring 25 and is used for reducing leakage outside a compression cavity. In the present embodiment, as shown in fig. 5 and 6, the air intake and exhaust port angle Φ, the air intake angle pi- θ - γ + Φ, and the air exhaust angle β + Φ satisfy Φ < θ <15 °, β >15 °, and Φ — 2 γ, so that the internal volume of the working chamber 22a at the end of air intake is the largest and the internal volume of the working chamber 22a at the end of air exhaust is the smallest, thereby ensuring sufficient air intake and air exhaust. When the axis of the piston rod 21 is in the first section a1, the two chambers of the compressor structure end respectively in suction and in discharge.

As shown in fig. 1 to 3, in the present embodiment, the needle roller bearing 26 is provided to reduce friction and improve the efficiency of the compressor structure, and the structure of the needle roller bearing 26 may be replaced by other mechanical structures having the same function.

As shown in fig. 12, the piston connecting rod 21 may be provided with a non-contact labyrinth structure on the circumferential surface of the piston to reduce internal leakage between the two working chambers and improve the overall efficiency of the compressor structure.

As shown in fig. 1 to 3, the compressor structure further includes an upper support plate 11, the upper support plate 11 and the valve plate 12 are respectively in limit fit with the upper and lower end faces of the rotary cylinder 22, a circular hole is formed in the centers of the upper support plate 11 and the valve plate 12 to reduce the friction surface, and a friction ring 211 is separately arranged between the valve plate 12 and the rotary cylinder to prevent direct friction between the valve plate and the rotary cylinder.

As shown in fig. 5 and 6, the valve cover 4 is provided with an air inlet chamber 43, a primary exhaust chamber 42 and a secondary exhaust chamber 41, respectively, and the air inlet chamber 43 cooperates with the valve plate 12 to ensure sufficient air suction of the compressor structure. The first-stage exhaust cavity 42 and the second-stage exhaust cavity 41 are arranged to have the same volume, and the two stages of exhaust cavities are connected through a cylindrical channel, so that the exhaust silencing and buffering effects are achieved.

The compressor structure of the invention has no crank slide block moving part and air inlet and outlet valve structure in the traditional piston compressor, thus simplifying the integral structure of the traditional piston compressor; the piston connecting rod moves stably and continuously, so that the operation reliability and the service life of the structure are improved; the piston connecting rod is small in stress, and the driving force of the rotating shaft is small, so that the problems of large stress and serious friction of a piston in the rotary cylinder piston compressor in the prior art are solved, and the overall efficiency of the rotary cylinder piston compressor is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical solutions of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.