CN115898812A

CN115898812A - Piston compressor

Info

Publication number: CN115898812A
Application number: CN202211346406.6A
Authority: CN
Inventors: 魏军英; 李刚; 张宸瑞; 刘宇; 常雯雯; 李祥; 杨磊
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-04

Abstract

The invention discloses a piston type compressor, which relates to the technical field of compressors and comprises a shell, wherein two primary piston cylinders, two driving mechanisms and two first transmission mechanisms are arranged in the shell, the two primary piston cylinders are coaxially fixed at intervals, a first piston and a second piston are matched in the primary piston cylinders, and the first pistons of the two primary piston cylinders are arranged oppositely and are fixed relatively; an air inlet pipe and a first exhaust pipe are communicated with the primary piston cylinder, and first check valves are arranged on the air inlet pipe and the first exhaust pipe; the driving mechanism drives the first piston to reciprocate along the axial direction of the primary piston cylinder; the first transmission mechanism links the first piston and the second piston, and the second piston synchronously moves towards or away from the first piston. The invention adopts a double-cylinder double-piston structure, the driving mechanism drives the two primary piston cylinders to alternately complete compression and expansion actions, thereby realizing continuous high-efficiency work application and improving the compression efficiency.

Description

Piston compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a piston type compressor with a double-cylinder double-piston structure.

Background

The compressor is the core of the energy storage technology, and the development of a more efficient, more convenient and more advanced compression device becomes the research target of broad researchers. The traditional piston type compressor has the advantages that the crankshaft rotates once, the cylinder completes the processes of air suction, compression and exhaust once, the compression efficiency is low, and the problems of complex and heavy structure, more easily damaged parts, large occupied area, large maintenance workload, short service life, discontinuous exhaust and the like exist.

Disclosure of Invention

The invention aims to provide a piston type compressor, and aims to solve the technical problem of low compression efficiency in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a piston compressor comprises a shell, a primary piston cylinder, a driving mechanism and a first transmission mechanism are arranged in the shell,

the two primary piston cylinders are coaxially fixed at intervals, a first piston and a second piston are matched in the primary piston cylinder, and the first pistons of the two primary piston cylinders are arranged oppositely and fixed relatively; an air inlet pipe and a first exhaust pipe are communicated with the primary piston cylinder, and first check valves are arranged on the air inlet pipe and the first exhaust pipe; the driving mechanism drives the first piston to reciprocate along the axial direction of the primary piston cylinder; the first transmission mechanism links the first piston and the second piston, and the second piston moves towards or away from the first piston synchronously.

The first exhaust pipe is communicated with the second piston cylinder, a second exhaust pipe is communicated with the second piston cylinder, and a second check valve is arranged on the second exhaust pipe; the second transmission mechanism is linked with the first transmission mechanism, and drives the third piston and the fourth piston to synchronously move in the opposite direction or in the opposite direction.

The first transmission mechanism comprises a power input shaft hinged to the first piston and a first crankshaft rotatably mounted on the shell, the power input shaft is driven by the power mechanism to reciprocate along the axial direction of the first-stage piston cylinder, and the power input shafts connected with the two first-stage piston cylinders are coaxially and fixedly connected; a first connecting rod and a second connecting rod are hinged to the first crankshaft, the outer end of the first connecting rod is hinged to the second piston, a connecting shaft is fixedly connected to the power input shaft, and the outer end of the second connecting rod is hinged to the connecting shaft.

The second transmission mechanism comprises a first connecting frame, a second connecting frame and a second crankshaft, a first transmission shaft is fixedly connected between the first connecting frame and the third piston, a second transmission shaft is fixedly connected between the second connecting frame and the fourth piston, a through hole penetrating through the second transmission shaft and the fourth piston is formed in the second connecting frame, and the first transmission shaft is connected to the through hole in a sealing and sliding manner; a third connecting rod is hinged on the first crankshaft, and the outer end of the third connecting rod is fixedly connected to the first connecting frame; the second crankshaft is rotatably connected to the shell, a fourth connecting rod and a fifth connecting rod are hinged to the second crankshaft, the outer end of the fourth connecting rod is hinged to the first connecting frame, and the outer end of the fifth connecting rod is hinged to the second connecting frame.

Wherein, the first transmission shaft is sleeved with a spring which is elastically supported between the first connecting frame and the second connecting frame.

The power mechanism comprises a mounting frame, a planetary gear and a motor, wherein the planetary gear and the motor are mounted on the mounting frame, the planetary gear comprises an outer gear ring, a sun gear and a planetary gear meshed between the outer gear ring and the sun gear, the outer gear ring is fixed on the mounting frame, the motor is in transmission connection with the sun gear, a reversing frame is fixedly connected between power input shafts connected with two primary piston cylinders, an elongated slot extending along the radial direction of the power input shafts is arranged on the reversing frame, a rotating shaft is in internally tangent fit with the elongated slot, and the rotating shaft is coaxially and fixedly connected with the planetary gear.

The first-stage piston cylinder, the driving mechanism, the first transmission mechanism, the second-stage piston cylinder and the second transmission mechanism are all located in the same shell, the shell is a cylinder body, and the first-stage piston cylinder and the second-stage piston cylinder are all arranged coaxially with the cylinder body.

Wherein, two ports of the shell are provided with heat dissipation covers.

The outlet end of the second exhaust pipe is fixedly connected to the heat dissipation cover.

Wherein, the inlet of the air inlet pipe is connected with a filter.

After the technical scheme is adopted, the invention has the beneficial effects that:

1. the invention adopts a double-cylinder double-piston structure, and the driving mechanism drives the two primary piston cylinders to alternately perform compression and expansion actions, thereby realizing continuous and efficient working; the pistons at two ends simultaneously compress gas in opposite directions, so that the compression stroke is reduced, and the compression efficiency is improved; the structure is low in overall assembly difficulty and stable in performance.

2. And a secondary piston cylinder is adopted to realize secondary compression, so that the compression efficiency is improved, and the method is suitable for ultra-high voltage industrial requirements.

Drawings

Fig. 1 is a schematic structural view of a piston compressor according to the present invention;

FIG. 2 is a partial perspective view of FIG. 1 with the housing removed;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view in perspective of FIG. 2 in longitudinal section;

in the figure, a housing 1, a base 10, a heat radiation cover 11, a primary piston cylinder 2, a first piston 20, a second piston 21, an air inlet pipe 22, a filter 220, a first exhaust pipe 23, a driving mechanism 3, a mounting frame 30, a planetary gear 31, an outer gear ring 310, a sun gear 311, a planetary gear 312, an electric motor 32, a reversing frame 33, a long groove 330, a revolving shaft 331, a first transmission mechanism 4, a power input shaft 40, a first crankshaft 41, a first connecting rod 42, a second connecting rod 43, a connecting shaft 44, a secondary piston cylinder 5, a third piston 50, a fourth piston 51, a second exhaust pipe 52, a second transmission mechanism 6, a first connecting frame 60, a second connecting frame 61, a second crankshaft 62, a first transmission shaft 63, a second transmission shaft 64, a third connecting rod 65, a fourth connecting rod 66, a fifth connecting rod 67 and a spring 68 are arranged.

Detailed Description

The invention is further elucidated below with reference to the accompanying drawing.

All the directions referred to in the specification are based on the directions of the piston compressor in normal operation of the present invention, and the directions of the piston compressor in storage and transportation are not limited, and only represent relative positional relationships, not absolute positional relationships.

As shown in fig. 1 to 4, the piston compressor includes a casing 1, the casing 1 is a cylinder, a base 10 is arranged in the cylinder, a base is arranged at the outer bottom of the casing 1, two primary piston cylinders 2, a driving mechanism 3 and a first transmission mechanism 4 are arranged in the cylinder, the primary piston cylinders 2 and the cylinder are coaxially arranged, the bottom ends of the primary piston cylinders 2 are fixed on the inner wall of the cylinder through a connecting plate, and the two primary piston cylinders 2 are symmetrically arranged on two sides of the driving mechanism 3.

The first piston cylinder 2 is internally matched with a first piston 20 and a second piston 21, the two first pistons 20 are connected into a relatively fixed state through a driving mechanism 3, and the driving mechanism 3 drives the two first pistons 20 to synchronously reciprocate left and right.

The second piston 21 in the same stage piston cylinder 2 forms the linkage with the action of the first piston 20 through the first transmission mechanism 4, so that when the first piston 20 moves leftwards, the second piston 21 moves rightwards, otherwise, when the first piston 20 moves rightwards, the second piston 21 moves leftwards.

A first air inlet is formed in the top of the middle of the primary piston cylinder 2, a first air outlet is formed in the bottom of the middle of the primary piston cylinder, the first air inlet is connected with an air inlet pipe 22, the first air outlet is connected with a first exhaust pipe 23, and first check valves are mounted on the air inlet pipe 22 and the first exhaust pipe 23; the first check valve on the air inlet pipe 22 only allows outside air to enter the first-stage piston cylinder 2, and the first check valve on the first exhaust pipe 23 only allows the air in the first-stage piston cylinder 2 to be discharged outside.

When the driving mechanism 3 drives the two first pistons 20 to move leftwards synchronously, the first piston 20 and the second piston 21 in the left first-stage piston cylinder 2 move oppositely, so that gas compression is carried out, and the compressed gas is discharged through the first exhaust pipe 23; the first piston 20 and the second piston 21 in the first-stage piston cylinder 2 on the right move back to each other, so that gas expansion is carried out, and outside gas enters the first-stage piston cylinder 2 through the gas inlet pipe 22. On the contrary, when the driving mechanism 3 drives the two first pistons 20 to synchronously move left, the left first-stage piston cylinder 2 performs gas expansion, and meanwhile, the right first-stage piston cylinder 2 performs gas compression. The driving mechanism 3 drives the two first pistons 20 to reciprocate and move left and right, thereby realizing continuous compression of gas.

In the present embodiment, the first transmission mechanism 4 includes a power input shaft 40, a first crankshaft 41, a first connecting rod 42, and a second connecting rod 43, and defines the axial direction of the one-stage piston cylinder 2 as the X direction, where the axial direction of the power input shaft 40 is the X direction and the axial direction of the first crankshaft 41 is the Y direction.

One end of the power input shaft 40 is rotatably connected to the outer end of the first piston 20 through a rotating shaft, the other end of the power input shaft is fixedly connected with an action end of the power mechanism, the power mechanism drives the power input shaft 40 to reciprocate along the axial direction of the primary piston cylinder 2, the base 10 is provided with a first mounting seat, the crankshaft is rotatably connected to the first mounting seat, and the first connecting rod 42 and the second connecting rod 43 are both rotatably connected to the first crankshaft 41. The outer end of the first connecting rod 42 is rotatably connected to the outer end of the second piston 21 through a rotating shaft, a connecting shaft 44 is fixedly connected to the power input shaft 40, the axial direction of the connecting shaft 44 is the Y direction, and the outer end of the second connecting rod 43 is rotatably connected to the connecting shaft 44. When the power input shaft 40 moves along the-X direction, the first piston 20 is driven to move along the-X direction, and the second connecting rod 43 swings on the vertical surface, so that the first crankshaft 41 is driven to rotate, and then the first connecting rod 42 swings, so that the second piston 21 is driven to move along the + X direction, and synchronous and efficient linkage of the first piston 20 and the second piston 21 is realized. In other embodiments, the first transmission mechanism 4 may also adopt a five-bar hinge mechanism as a driving element.

In this embodiment, the power mechanism includes a mounting bracket 30, a planetary gear 31, a motor 32 and a reversing bracket 33, the mounting bracket 30 is fixed on the inner wall of the cylinder, the motor 32 is located inside the mounting bracket 30, a heat dissipation opening is formed in a side portion of the mounting bracket 30, the planetary gear 31 includes an outer ring gear 310, a sun gear 311 and a planetary gear 312 engaged between the outer ring gear 310 and the sun gear 311, the outer ring gear 310 is welded on the top of the mounting bracket 30, a driving shaft of the motor 32 extends upwards through a top plate of the mounting bracket 30 and is coaxially and fixedly connected with the sun gear 311, and the sun gear 311 is driven to rotate by the motor 32, so as to drive the planetary gear 312 to rotate around the sun gear 311. A rotating shaft 331 is coaxially and fixedly connected to the planet wheel 312. The reversing frame 33 comprises two shaft parts which are coaxially butted with the two power input shafts 40 along the X direction, a long groove 330 is arranged on the reversing frame 33, the long groove 330 is arranged along the Y direction, and the rotating shaft 331 extends into the long groove 330. The revolving shaft 331 is driven by the motor 32 to rotate around the sun gear 311, thereby moving the reversing frame 33 back and forth in the X direction. In other embodiments, a cam may be used instead of the planetary gear 31.

Furthermore, each primary piston cylinder 2 corresponds to one secondary piston cylinder 5, each secondary piston cylinder 5 is fixed in the cylinder body through a connecting plate, a third piston 50 and a fourth piston 51 are matched in each secondary piston cylinder 5, a second air inlet is formed in the middle top of each secondary piston cylinder 5, a second air outlet is formed in the middle bottom of each secondary piston cylinder 5, each second air inlet is connected with the first exhaust pipe 23, each second air outlet is connected with the second exhaust pipe 52, and each second exhaust pipe 52 is provided with a second one-way valve; the second check valve only allows the gas of the secondary piston cylinder 5 to be discharged outside. The secondary piston cylinder 5 corresponds to the second transmission mechanism 6, and the second transmission mechanism 6 is linked with the first transmission mechanism 4 and synchronously drives the third piston 50 and the fourth piston 51 to synchronously move towards or away from each other. When the primary piston cylinder 2 compresses gas, the gas simultaneously enters the secondary compression cylinder 5 to be compressed for the second stage, and then is continuously conveyed outwards, so that the gas compression efficiency is improved.

In this embodiment, the second transmission mechanism 6 includes a first connecting frame 60, a second connecting frame 61 and a second crankshaft 62, a first transmission shaft 63 is fixedly connected between the first connecting frame 60 and the third piston 50, a second transmission shaft 64 is fixedly connected between the second connecting frame 61 and the fourth piston 51, the axial directions of the first transmission shaft 63 and the second transmission shaft 64 are both in the X direction, a through hole penetrating through the second transmission shaft 64 and the fourth piston 51 is arranged on the second connecting frame 61, and the first transmission shaft 63 is connected to the through hole in a sealing and sliding manner; a third connecting rod 65 is rotatably connected to the first crankshaft 41, and the outer end of the third connecting rod 65 is fixed on the first connecting frame 60; the base 10 internal fixation has the second mount pad, and second bent axle 62 rotates to be connected on the second mount pad, and the axial of second bent axle 62 is Z to, rotates on the second bent axle 62 and is connected with fourth connecting rod 66 and fifth connecting rod 67, and the fourth connecting rod 66 outer end rotates to be connected on first link 60, and the fifth connecting rod 67 outer end rotates to be connected on second link 61. When the first crankshaft 41 rotates, the first connecting frame 60 is driven to move along the X direction, the second crankshaft 62, the fourth connecting rod 66 and the fifth connecting rod form a crankshaft connecting rod mechanism, the first connecting frame 60 drives the second connecting frame 61 to move along the X direction through the crankshaft connecting rod mechanism, and the moving directions of the first connecting frame 60 and the second connecting frame 61 are opposite, because the third piston 50 and the first connecting frame 60 move synchronously, and the fourth piston 51 and the second connecting frame 61 move synchronously, when the first connecting frame 60 and the second connecting frame 61 move oppositely, the third piston 50 and the fourth piston 51 move oppositely, so that air between the first connecting frame 60 and the second connecting frame is compressed, and secondary compression is realized.

Furthermore, a spring 68 is sleeved on the first transmission shaft 63, and the spring 68 is elastically supported between the first connecting frame 60 and the second connecting frame 61. In the process of synchronous action of the first transmission mechanism 4 and the second transmission mechanism 6, the spring 68 is always in a compressed state, so that the whole second transmission mechanism 6 is prevented from being blocked when the fourth connecting rod 66 is parallel to the fifth connecting rod 67.

Further, two ports of the cylinder are provided with heat dissipation covers 11, and the heat dissipation covers 11 are used for heat dissipation when the inside of the shell 1 does work. Preferably, the outlet end of the second exhaust pipe 52 is fixedly connected to the heat dissipation cover 11, wherein the inlet of the intake pipe 22 is connected with a filter 220 for filtering air.

The present invention is not limited to the above-described embodiments, and various modifications made by those skilled in the art without inventive skill from the above-described conception fall within the scope of the present invention.

Claims

1. A piston compressor comprises a shell, a primary piston cylinder, a driving mechanism and a first transmission mechanism are arranged in the shell, and is characterized in that,

the two primary piston cylinders are coaxially fixed at intervals, a first piston and a second piston are matched in the primary piston cylinder, and the first pistons of the two primary piston cylinders are arranged oppositely and fixed relatively;

an air inlet pipe and a first exhaust pipe are communicated with the primary piston cylinder, and first check valves are mounted on the air inlet pipe and the first exhaust pipe;

the driving mechanism drives the first piston to reciprocate along the axial direction of the primary piston cylinder;

the first transmission mechanism links the first piston and the second piston, and the second piston moves towards or away from the first piston synchronously.

2. The piston compressor according to claim 1, wherein a secondary piston cylinder is coaxially and correspondingly arranged in any one of the primary piston cylinders, the secondary piston cylinder is fixedly connected in the shell, a third piston and a fourth piston are matched in the secondary piston cylinder, the first exhaust pipe is communicated with the secondary piston cylinder, a second exhaust pipe is communicated with the second piston cylinder, and a second check valve is arranged on the second exhaust pipe;

the second transmission mechanism is linked with the first transmission mechanism and drives the third piston and the fourth piston to synchronously move towards or away from each other.

3. A piston compressor as claimed in claim 2, wherein said first transmission mechanism includes a power input shaft hinged to said first piston and a first crankshaft rotatably mounted on said housing, said power mechanism driving said power input shaft to reciprocate along an axial direction of said one-stage piston cylinder, and two power input shafts connected to said one-stage piston cylinders are coaxially and fixedly connected;

the first crankshaft is hinged with a first connecting rod and a second connecting rod, the outer end of the first connecting rod is hinged with the second piston, the power input shaft is fixedly connected with a connecting shaft, and the outer end of the second connecting rod is hinged with the connecting shaft.

4. A piston compressor as claimed in claim 3, wherein said second transmission mechanism includes a first connecting frame, a second connecting frame and a second crankshaft, a first transmission shaft is fixedly connected between said first connecting frame and said third piston, a second transmission shaft is fixedly connected between said second connecting frame and said fourth piston, said second connecting frame is provided with a through hole penetrating said second transmission shaft and said fourth piston, said first transmission shaft is sealingly and slidably connected to said through hole;

a third connecting rod is hinged to the first crankshaft, and the outer end of the third connecting rod is fixedly connected to the first connecting frame;

the second crankshaft is rotatably connected to the shell, a fourth connecting rod and a fifth connecting rod are hinged to the second crankshaft, the outer end of the fourth connecting rod is hinged to the first connecting frame, and the outer end of the fifth connecting rod is hinged to the second connecting frame.

5. A piston compressor as claimed in claim 4, wherein said first drive shaft is sleeved with a spring, said spring being elastically supported between said first link frame and said second link frame.

6. A piston compressor as claimed in claim 3, wherein said power mechanism includes a mounting frame, a planetary gear and a motor mounted on the mounting frame, said planetary gear includes an outer gear ring, a sun gear, and planetary gears engaged between the outer gear ring and the sun gear, said outer gear ring is fixed on said mounting frame, said motor is in transmission connection with said sun gear, a reversing frame is fixedly connected between power input shafts connected to two of said primary piston cylinders, said reversing frame is provided with a long groove extending along a radial direction of said power input shafts, said long groove is internally fitted with a revolving shaft, and said revolving shaft is coaxially fixedly connected with said planetary gears.

7. A piston compressor as claimed in claim 4, wherein said primary piston cylinder, said drive mechanism, said first drive mechanism, said secondary piston cylinder, and said second drive mechanism are all located within a common housing, said housing being a cylinder, said primary piston cylinder, said secondary piston cylinder all being disposed coaxially with said cylinder.

8. A piston compressor as claimed in claim 7, wherein heat radiating covers are installed at both ends of said shell.

9. A piston compressor as claimed in claim 8, wherein an outlet end of said second discharge pipe is fixedly attached to said heat radiating cover.

10. A piston compressor as claimed in any one of claims 1 to 9, wherein a filter is connected to an inlet of said intake pipe.