CN117052637A

CN117052637A - Compressor and compression method

Info

Publication number: CN117052637A
Application number: CN202311093676.5A
Authority: CN
Inventors: 黄丕江; 李春辉; 张坤昊; 郑晓娟; 陈亮; 吴明勋
Original assignee: Johnson Controls Hitachi Wanbao Compressor Guangzhou Co Ltd
Current assignee: Johnson Controls Hitachi Wanbao Compressor Guangzhou Co Ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2023-11-14

Abstract

The invention discloses a compressor and a compression method, which belong to the technical field of gas compression, wherein the compressor comprises a shell and a first rotor mechanism, the shell is provided with an installation cavity, a first air inlet and a first air outlet, the first air inlet is communicated with the first air outlet, and the first air inlet and the first air outlet are oppositely arranged; the first rotor mechanism is provided with a spiral component and a centrifugal component, and the spiral component and the centrifugal component are both arranged in the installation cavity of the shell and are both in running fit with the inner wall of the shell; the spiral component is in a cone-shaped structure, the maximum end of the spiral component is connected with the centrifugal component and is arranged near the first air inlet, and the minimum end of the spiral component is arranged near the first air outlet; the outer wall of the spiral component and the inner wall of the shell form a first compression channel, and the first air inlet, the first compression channel and the first air outlet are sequentially communicated. When the gas is compressed, the cone-shaped spiral component can gradually compress the gas, so that the gas is gradually boosted and accelerated, and the surge phenomenon is not easy to occur.

Description

Compressor and compression method

Technical Field

The invention belongs to the technical field of gas compression, and particularly relates to a compressor and a compression method.

Background

In gas compression operations, a compressor is generally used, which is a driven fluid machine that lifts low-pressure gas to high pressure. The compressor may be classified into a piston compressor, a screw compressor, a centrifugal compressor, etc. The compressor is widely applied to various fields such as air conditioning refrigeration, pneumatic tools, rock drills, air cushion ships and the like.

The centrifugal compressor uses an impeller rotating at a high speed to apply work to gas, and mechanical energy is added to the gas to raise the pressure of the gas and increase the speed, so that the gas obtains pressure energy and speed energy. The back of the impeller is provided with a diffuser element (diffuser) with gradually enlarged flow area, and after the high-speed gas flows out from the impeller, the high-speed gas flows through the diffuser to be subjected to speed-reducing diffusion, so that the flow speed of the gas is reduced, the pressure is continuously increased, namely, a part of the speed energy (kinetic energy) of the gas is converted into pressure energy, and the compression process is completed.

However, the existing centrifugal compressor has low single-stage pressure ratio, a multistage impeller is needed to obtain higher pressure, and a speed increasing gear is generally needed, so that in actual operation, the speed increasing and the pressure increasing are too fast, and the surge phenomenon is easy to occur due to the fact that the pressure is not reduced first before the speed is reduced.

Disclosure of Invention

The invention aims to provide a compressor and a compression method, which realize the structural combination of a centrifugal compressor and a screw compressor, are not easy to generate surge phenomenon and have simple structure.

The technical scheme is as follows:

a compressor, comprising:

the shell is provided with an installation cavity, a first air inlet and a first air outlet, the first air inlet is communicated with the first air outlet, and the first air inlet and the first air outlet are oppositely arranged;

the first rotor mechanism is provided with a spiral component and a centrifugal component, and the spiral component and the centrifugal component are both arranged in the installation cavity of the shell and are both in running fit with the inner wall of the shell; the spiral component is at least partially in a cone-shaped structure, the maximum end of the spiral component is connected with the centrifugal component and is arranged close to the first air inlet, and the minimum end of the spiral component is arranged close to the first air outlet;

the outer wall of the spiral component and the front part of the inner wall of the shell form a first compression channel, and the first air inlet, the first compression channel and the first air outlet are sequentially communicated.

In one embodiment, the screw assembly includes a driving shaft and a screw, the driving shaft and the screw are in an integral structure, the centrifugal assembly is sleeved outside the driving shaft, the screw is in a cone-shaped structure, the outer wall of the screw is provided with a plurality of first screw blades, and a plurality of first compression channels are formed between the first screw blades and the inner wall of the shell;

an included angle is formed between the outer wall of the first helical blade in the length direction and the horizontal line, and the degree of the included angle is 5-20 degrees.

In one embodiment, the first helical blade is wound on the outer wall of the screw rod and extends along the axial line direction of the screw rod.

In one embodiment, a plurality of the first compression channels are arranged in a relatively isolated manner; the volume of each first compression channel gradually decreases from the first air inlet to the first air outlet.

In one embodiment, a gap is formed between the outer end of the first helical blade and the inner wall of the shell, a plurality of oil injection ports are formed in the circumferential direction of the shell, the oil injection ports are in one-to-one correspondence with the first compression channels, and the oil injection ports are communicated with the first compression channels.

In one embodiment, a first bearing seat and a second bearing seat are arranged in the shell, a convex column is arranged at a position, close to the first air outlet, of the screw rod, the convex column is arranged on the first bearing seat, the driving shaft is arranged on the second bearing seat, and the driving shaft is used for being connected with a power source.

In one embodiment, the housing is provided with at least two connection beams, the two connection beams are arranged oppositely, a first end of each connection beam is fixed with the housing, and a second end of each connection beam is fixed with the first bearing seat or the second bearing seat.

In one embodiment, the centrifugal assembly comprises a wheel body and a plurality of second spiral blades, wherein the wheel body is fixed with the maximum end of the spiral assembly, the first ends of the second spiral blades are mounted on the inner wall of the wheel body, and the second ends of the second spiral blades are mounted on the driving shaft of the spiral assembly;

and a second compression channel is formed between two adjacent second helical blades, and the second compression channel is communicated with the first compression channel.

In one embodiment, the compressor further comprises an adapter and a second rotor mechanism, wherein the adapter is provided with a discharge port, a first connecting port and a second connecting port, and the first connecting port and the second connecting port are arranged opposite to each other;

the first rotor mechanism is arranged at the first connecting port, and the first air inlet, the first air outlet and the air outlet are sequentially communicated; the second rotor mechanism is arranged on the second connecting port and is provided with a second air inlet and a second air outlet, and the second air inlet, the second air outlet and the air outlet are sequentially communicated;

the bottom wall of the adapter, which is close to the first air outlet or the second air outlet, is arc-shaped, and the bottom wall of the adapter is arranged opposite to the air outlet.

The invention also provides a compression method of the compressor, which comprises the following steps:

starting a first rotor mechanism and a second rotor mechanism, and enabling low-pressure gas to sequentially enter a second compression channel and a first compression channel from a first air inlet or a second air inlet; the driving shaft drives the centrifugal component and the spiral component to rapidly rotate in the shell so as to compress low-pressure gas;

step two, adopting an oil injection mechanism to spray lubricating oil into the shell through an oil injection port;

and thirdly, compressing the low-pressure gas to form high-pressure gas, and discharging the high-pressure gas and lubricating oil from an exhaust port.

The technical scheme provided by the invention has the following advantages and effects:

1. the spiral component and the centrifugal component are installed in the shell and are in running fit with the inner wall of the shell, when the spiral component and the centrifugal component rotate in the shell, low-pressure gas is sucked into the spiral component and the centrifugal component through the first air inlet, the low-pressure gas is pressurized and accelerated for the first time through the centrifugal component, then the low-pressure gas enters the first compression channel, high-pressure gas is formed in the first compression channel along with high-speed rotation of the spiral component and moves along the axial lead of the spiral component and is discharged towards the first air outlet, after the high-pressure gas is discharged, the first compression channel is in a vacuum state, the first compression channel rotates to the first air inlet, and the low-pressure gas outside the first air inlet is sucked in, so the low-pressure gas reciprocates, so that the compressor completes three stages of air suction, compression and air exhaust. Because the spiral component is at least partially cone-shaped, and the biggest end of spiral component is connected with centrifugal component, and is close to first air inlet, when first compression passageway breathes in, increase the gaseous intake of first air inlet, because the cone-shaped structure of spiral component makes the cavity of first compression passageway reduce gradually from first air inlet to first gas outlet, when compressed gas, can step by step compressed gas, make gaseous step up and rise speed gradually, avoid rising speed and step up too fast, also can make gaseous step down gradually when the deceleration, avoid adopting the diffuser to boost pressure, make it be difficult for appearing surging the phenomenon, and simple structure. The centrifugal compressor and the screw compressor are structurally combined, the centrifugal force generated by the centrifugal component during rotation is utilized to enable gas in the centrifugal component to be discharged rapidly, the air suction amount of the centrifugal component is improved, the spiral component is good in dynamic balance by utilizing the centrifugal component, unbalanced inertial force is avoided, the structure is simple, the adaptability is high, the forced air transmission is achieved, the flow in the first compression channel is not influenced by the exhaust pressure, and high efficiency can be maintained in a wide working condition range.

2. The driving shaft is used for connecting a power source, so that the driving shaft drives the screw rod and the centrifugal assembly to rotate simultaneously, the outer wall of the screw rod is provided with a plurality of first helical blades, a plurality of first compression channels are formed between the first helical blades and the inner wall of the shell, and the first compression channels are used for compressing a large amount of low-pressure gas, so that the compression efficiency of the compressor is improved; an included angle is formed between the outer wall of the first helical blade in the length direction and the horizontal line, the degree of the included angle is 5-20 degrees, the included angle is not easy to be too large, the first helical blade at the end part of the screw rod is smaller due to the too large angle, and the flow of the first air outlet is too small; moreover, the degree of the included angle can further enable the gas to gradually boost and rise when the flow of the first air outlet is not affected, and the phenomenon that the rising speed and the rising speed are too fast is avoided.

3. The first helical blade is wound on the outer wall of the screw rod and extends along the length direction of the screw rod, and under the condition that the driving shaft drives the screw rod to rotate at a high speed, the first compression channel compresses gas along the axial lead direction of the screw rod, and the gas is pressurized and accelerated in the first compression channel and is discharged from the first air outlet.

4. The plurality of first compression channels are arranged in a relatively isolated mode, so that each compression channel compresses gas relatively independently, the tightness of the first compression channels is improved, and the performance of compressed air of the spiral assembly is improved.

5. The outer ends of the first helical blades and the inner wall of the shell are provided with gaps, the circumference of the shell is provided with a plurality of oil injection ports, the oil injection ports are in one-to-one correspondence with the plurality of first compression channels, the oil injection ports are communicated with the first compression channels, and an oil injection mechanism outside the shell injects oil into the shell through the oil injection ports and is used for lubricating the gaps between the first helical blades and the inner wall of the shell, reducing the leakage of gas in the shell, improving the compression ratio and placing the leakage of refrigerant gas; the oil is also used for taking away heat generated in the compression process, so that the compressor is close to isothermal compression, the efficiency is improved, the exhaust temperature is reduced, the friction between the first helical blade and the inner wall of the shell can be reduced by the oil in the phase shell, and the abrasion of mechanical parts is reduced; as the injected oil is viscous fluid, the oil has absorption and damping effects on sound energy and sound waves, and the noise can be reduced by 10-20 dB after the oil is injected, thereby realizing the noise reduction of the compressor.

6. The first bearing seat and the second bearing seat are used for supporting the driving shaft and the screw rod to rotate at a high speed in the shell, and meanwhile friction force generated when the driving shaft and the screw rod rotate in the shell is reduced, and energy loss is reduced.

7. The connecting stability of the shell, the first bearing seat and the second bearing seat is improved through the two connecting beams, and the connecting beams are used for supporting the screw assembly and the centrifugal assembly to rotate at a high speed in the shell.

8. Through the maximum end of wheel body and screw assembly fixed, a plurality of second helical blade installs between wheel body and drive shaft, form the second compression passageway between two adjacent second helical blade, the drive shaft drives second helical blade and first helical blade high-speed rotation simultaneously, the second compression passageway is arranged in absorbing the low-pressure gas of first air inlet, low-pressure gas is in the second compression passageway, second helical blade is to low-pressure gas work, make gas obtain improving under centrifugal effect, kinetic energy also greatly increased simultaneously, after realizing the first compression of low-pressure gas, then get into first compression passageway, under the effect of first helical blade, realize the second compression of low-pressure gas.

9. The first rotor mechanism and the second rotor mechanism are respectively connected with the first connecting port and the second connecting port of the adapter, the first rotor mechanism and the second rotor mechanism are independently controlled, and can do work simultaneously and do work respectively, so that the flexibility of the compressor is improved, gas compressed by the first rotor mechanism and the second rotor mechanism is discharged from the exhaust port, and the compression efficiency of the compressor is improved. And the bottom wall of the adapter, which is close to the first air outlet or the second air outlet, is arc-shaped and is used for guiding high-pressure air to be discharged from the air outlet, so that the trafficability of the high-pressure air at the air outlet is improved.

10. By the compression method, only the first rotor mechanism and the second rotor mechanism are required to be started, and then oil is sprayed into the shell, so that the operation of the compressor can be realized, the operation is simple, and the requirement on operators is low.

Drawings

Fig. 1 is a schematic view showing the structure of a compressor according to an embodiment of the present invention.

Fig. 2 is a front view of a compressor in an embodiment of the present invention.

Figure 3 is a cross-sectional view of A-A of a compressor in an embodiment of the present invention.

Fig. 4 is a B-B cross-sectional view of a compressor in an embodiment of the invention.

Fig. 5 is a schematic structural view of a first rotor mechanism according to an embodiment of the present invention.

Fig. 6 is a schematic view of a screw assembly in an embodiment of the invention.

Fig. 7 is an elevation view of a screw assembly in an embodiment of the present invention.

Fig. 8 is a schematic view of a centrifugal assembly according to an embodiment of the invention.

Fig. 9 is a schematic diagram of a centrifugal assembly according to an embodiment of the invention.

Reference numerals illustrate:

100. a compressor; 1. an adapter; 11. an exhaust port; 12. a first connection port; 13. a second connection port; 2. a first rotor mechanism; 21. a housing; 211. a first housing; 212. a second housing; 213. a first air inlet; 214. a first air outlet; 22. an oil spraying port; 23. a screw assembly; 231. a drive shaft; 232. a screw; 233. a first helical blade; 234. a first compression passage; 235. a convex column; 24. a centrifuge assembly; 241. a wheel body; 242. a second helical blade; 243. a second compression passage; 25. a first bearing seat; 251. a connecting beam; 26. a second bearing seat; 27. an included angle; 3. a second rotor mechanism; 31. a second air inlet; 32. and a second air outlet.

Detailed Description

In order that the invention may be readily understood, a more particular description of specific embodiments thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As used herein, the terms "first and second …" are used merely to distinguish between names and not to represent a particular number or order unless otherwise specified or defined.

The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items, unless specifically stated or otherwise defined.

The term "fixed" or "connected" as used herein may be directly fixed or connected to an element, or indirectly fixed or connected to an element.

As shown in fig. 1 to 7, a compressor 100 includes a housing 21 and a first rotor mechanism 2, the housing 21 having a mounting chamber, a first air inlet 213 and a first air outlet 214, the first air inlet 213 communicating with the first air outlet 214, and the first air inlet 213 being disposed opposite to the first air outlet 214; the first rotor mechanism 2 is provided with a screw assembly 23 and a centrifugal assembly 24, and the screw assembly 23 and the centrifugal assembly 24 are both arranged in the installation cavity of the shell 21 and are both in rotary fit with the inner wall of the shell 21; the spiral component 23 is at least partially in a cone-shaped structure, the largest end of the spiral component 23 is connected with the centrifugal component 24 and is arranged near the first air inlet 213, and the smallest end of the spiral component 23 is arranged near the first air outlet 214; the outer wall of the screw assembly 23 and the inner wall of the housing 21 are previously formed with a first compression passage 234, and the first air inlet 213, the first compression passage 234, and the first air outlet 214 are sequentially communicated. By installing the screw assembly 23 and the centrifugal assembly 24 in the housing 21 and rotationally matching with the inner wall of the housing 21, when the screw assembly 23 and the centrifugal assembly 24 rotate in the housing 21, the screw assembly 23 and the centrifugal assembly 24 suck low-pressure gas through the first air inlet 213, the low-pressure gas is pressurized and accelerated for the first time through the centrifugal assembly 24, then the low-pressure gas enters the first compression channel 234, high-pressure gas is formed in the first compression channel 234 along with high-speed rotation of the screw assembly 23, the high-pressure gas moves along the axial lead of the screw assembly 23 and is discharged towards the first air outlet 214, after the high-pressure gas is discharged, the first compression channel 234 is in a vacuum state, the first compression channel 234 rotates to the first air inlet 213, and the low-pressure gas outside the first air inlet 213 is sucked, so that the compressor 100 is reciprocated to complete three stages of air suction, compression and air discharge.

In addition, because the spiral component 23 is at least partially cone-shaped, and the maximum end of the spiral component 23 is connected with the centrifugal component 24 and is close to the first air inlet 213, because the centrifugal component 24 is at the maximum end of the spiral component 23, the contact area between the centrifugal component 24 and the air is larger, when the first compression channel 234 sucks air, the air suction amount of the first air inlet 213 of the centrifugal component 24 is increased, and because of the cone-shaped structure of the spiral component 23, the cavity of the first compression channel 234 is gradually reduced from the first air inlet 213 to the first air outlet 214, when the air is compressed, the air can be gradually compressed, so that the air is gradually boosted and accelerated, the excessive boosting speed is avoided, and the air can be gradually slowed down when the air is slowed down, so that the surge phenomenon is avoided, and the air is not easy to occur. In this embodiment, the centrifugal compression and screw compression structure is combined, the centrifugal force generated by the centrifugal assembly 24 during rotation is utilized to make the gas in the centrifugal assembly 24 rapidly discharged, the air suction amount of the centrifugal assembly 24 is improved, the spiral assembly 23 has good dynamic balance and no unbalanced inertia force by utilizing the dynamic balance, the structure is simple, the adaptability is strong, the forced air transmission is realized, the flow in the first compression channel 234 is not influenced by the exhaust pressure, and the higher efficiency can be maintained in a wide working condition range. In the present embodiment, the screw assembly 23 and the centrifugal assembly 24 are used for secondarily compressing the low-pressure gas, so that the high-pressure ratio of the compressor 100 is increased, and the screw 232 has a cone-shaped structure, the longer the length of the screw 232 is, the greater the gas pressure applied to the first compression passage 234 is.

As shown in fig. 3, 6 and 7, the screw assembly 23 includes a driving shaft 231 and a screw 232, the driving shaft 231 and the screw 232 are in an integrated structure, the centrifugal assembly 24 is sleeved outside the driving shaft 231, the screw 232 is in a cone-shaped structure, the outer wall of the screw 232 is provided with a plurality of first screw blades 233, and a plurality of first compression channels 234 are formed between the plurality of first screw blades 233 and the inner wall of the shell 21; the first helical blade 233 forms an included angle 27 between the outer wall in the length direction and the horizontal line, and the degree of the included angle 27 is 5 to 20 degrees. The driving shaft 231 is used for connecting a power source, so that the driving shaft 231 drives the screw 232 and the centrifugal assembly 24 to rotate simultaneously, the outer wall of the screw 232 is provided with a plurality of first helical blades 233, a plurality of first compression channels 234 are formed between the first helical blades 233 and the inner wall of the shell 21, and the first compression channels 234 are used for compressing a large amount of low-pressure gas, so that the compression efficiency of the compressor 100 is improved; an included angle 27 is formed between the outer wall of the first helical blade 233 in the length direction and the horizontal line, the degree of the included angle 27 is 5 to 20 degrees, the angle 27 of the included angle 27 is not easy to be too large, the first helical blade 233 at the end part of the screw 232 is smaller due to the too large angle, and the flow of the first air outlet 214 is too small; moreover, the degree of the included angle 27 can further gradually increase the pressure and increase the speed of the gas without affecting the flow rate of the first gas outlet 214, so as to avoid excessively rapid increase of the pressure and the speed.

As shown in fig. 6 and 7, the first helical blade 233 is wound around the outer wall of the screw 232 and is provided to extend in the axial line direction of the screw 232. When the driving shaft 231 drives the screw 232 to rotate at a high speed, the first compression passage 234 compresses the gas in the axial line direction of the screw 232, and the gas is pressurized and accelerated in the first compression passage 234 and discharged from the first gas outlet 214.

As shown in fig. 4 and 6, the plurality of first compression passages 234 are disposed in relatively isolated relation; the volume of each first compression passage 234 gradually decreases from the first air inlet 213 to the first air outlet 214. The plurality of first compression passages 234 are arranged in a relatively isolated manner, so that each compression passage 234 is relatively independent of compressed gas, the tightness of the first compression passages 234 is improved, and the performance of the spiral assembly 23 for compressing air is improved.

As shown in fig. 3 and 4, a gap is formed between the outer end of the first spiral vane 233 and the inner wall of the casing 21, the gap is generally 5 to 10 wires, so that the first spiral vane 233 and the inner wall of the casing 21 are not in metal contact theoretically, a plurality of oil injection ports 22 are formed in the circumferential direction of the casing 21, the plurality of oil injection ports 22 are in one-to-one correspondence with the plurality of first compression passages 234, and the oil injection ports 22 are communicated with the first compression passages 234. The oil injection mechanism outside the casing 21 injects lubricating oil into the casing 21 through the oil injection port 22 for lubricating the gap between the first helical blade 233 and the inner wall of the casing 21, reducing the leakage of gas inside the casing 21, improving the compression ratio and placing the refrigerant gas leakage. After injection into the housing 21, as the screw assembly 23 rotates, the lubricant will form an oil film between the first screw blades 233 and the inner wall of the housing 21, which can theoretically be sealed by the smaller gap. Moreover, the lubricating oil is also used for taking away heat generated in the compression process, so that the compressor 100 is close to isothermal compression, the efficiency is improved, the exhaust temperature is reduced, the friction between the first spiral blade 233 and the inner wall of the shell 21 can be reduced by the lubricating oil in the phase shell 21, and the abrasion of mechanical parts is reduced; because the injected lubricating oil is viscous fluid, the lubricating oil has absorption and damping effects on sound energy and sound waves, and the noise can be reduced by 10-20 dB after the oil injection, thereby realizing the noise reduction of the compressor 100.

As shown in fig. 3 and 5, the housing 21 has a first bearing seat 25 and a second bearing seat 26 therein, the screw 232 has a boss 235 near the first air outlet 214, the boss 235 is mounted on the first bearing seat 25, the driving shaft 231 is mounted on the second bearing seat 26, and the driving shaft 231 is used for connecting a power source. The first bearing housing 25 and the second bearing housing 26 are used for supporting the driving shaft 231 and the screw 232 for high-speed rotation of the housing 21, and simultaneously reducing friction generated when the driving shaft 231 and the screw 232 rotate in the housing 21, and reducing energy loss.

As shown in fig. 5, at least two connection beams 251 are provided in the housing 21, the two connection beams 251 are disposed opposite to each other, a first end of the connection beam 251 is fixed to the housing 21, and a second end of the connection beam 251 is fixed to the first bearing housing 25 or the second bearing housing 26. The connection stability of the housing 21 with the first bearing housing 25 and the second bearing housing 26 is improved by the two connection beams 251 for supporting the screw assembly 23 and the centrifugal assembly 24 to rotate at a high speed within the housing 21.

In the present embodiment, the housing 21 includes a first housing 211 and a second housing 212, the first housing 211 and the second housing 212 are connected by a flange, the first bearing 25 is located in the second housing 212, the second bearing 26 is located in the first housing 211, the first housing 211 is configured to be matched with the outer end shape of the centrifugal assembly 24, and the second housing 212 is configured to be matched with the outer end shape of the screw assembly 23, so that the two housings are separately processed.

As shown in fig. 6, 8 and 9, the centrifugal assembly 24 includes a wheel body 241 and a plurality of second spiral blades 242, the wheel body 241 is fixed to the maximum end of the spiral assembly 23, first ends of the plurality of second spiral blades 242 are mounted on the inner wall of the wheel body 241, and second ends of the plurality of second spiral blades 242 are mounted on the driving shaft 231 of the spiral assembly 23; a second compression passage 243 is formed between two adjacent second spiral blades 242, and the second compression passage 243 communicates with the first compression passage 234. Through the maximum fixed of wheel body 241 and spiral subassembly 23, a plurality of second helical blade 242 are installed between wheel body 241 and drive shaft 231, form second compression passageway 243 between two adjacent second helical blade 242, drive shaft 231 drives second helical blade 242 and first helical blade 233 high-speed rotation simultaneously, second compression passageway 243 is used for absorbing the low-pressure gas of first air inlet 213, low-pressure gas is in second compression passageway 243, second helical blade 242 is to low-pressure gas work, make gas under centrifugal effect pressure obtain improving, kinetic energy is also greatly increased simultaneously, realize the first compression of low-pressure gas, then get into first compression passageway 234, realize the second compression of low-pressure gas under the effect of first helical blade 233.

As shown in fig. 1 to 3, the compressor 100 further includes an adapter 1 and a second rotor mechanism 3, the adapter 1 having a discharge port 11, a first connection port 12, and a second connection port 13, the first connection port 12 being disposed opposite to the second connection port 13; the first rotor mechanism 2 is arranged on the first connecting port 12, and the first air inlet 213, the first air outlet 214 and the air outlet 11 are communicated in sequence; the second rotor mechanism 3 is mounted on the second connection port 13, the second rotor mechanism 3 is provided with a second air inlet 31 and a second air outlet 32, and the second air inlet 31, the second air outlet 32 and the air outlet 11 are sequentially communicated; the bottom wall of the adaptor 1, which is close to the first air outlet 214 or the second air outlet 32, is arc-shaped, and the inner arc surface of the adaptor 1 is opposite to the air outlet 11. The first rotor mechanism 2 and the second rotor mechanism 3 are respectively connected with the first connecting port 12 and the second connecting port 13 of the adapter 1, the first rotor mechanism 2 and the second rotor mechanism 3 can be independently controlled and can also be controlled by adopting a single driving shaft 231, and can simultaneously do work and do work respectively, so that the flexibility of the compressor 100 is improved, the gas compressed by the first rotor mechanism 2 and the second rotor mechanism 3 is discharged from the exhaust port 11, and the compression efficiency of the compressor 100 is improved. Moreover, the bottom wall of the adaptor 1, which is close to the first air outlet 214 or the second air outlet 32, is arc-shaped and is used for guiding the high-pressure air to be discharged from the air outlet 11, the high-pressure air enters the adaptor 1 and directly acts on the inner arc surface of the bottom wall of the adaptor 1, the inner arc surface of the bottom wall of the adaptor 1 corresponds to the air outlet 11, the high-pressure air is guided to the air outlet 11 by the inner arc surface of the bottom wall of the adaptor 1, and the trafficability of the high-pressure air at the air outlet 11 is improved.

The compressor 100 operates on the following principle: the motor is adopted to drive the driving shaft 231, the driving shaft 231 drives the spiral assembly 23 and the centrifugal assembly 24 to rotate at a high speed, the spiral assembly 23 and the centrifugal assembly 24 do work on low-pressure gas in the first compression channel 234 and the second compression channel 243 through the first spiral blade 233 and the second spiral blade 242 in the high-speed rotation process, metal contact is avoided in the driving process (theoretically), when the spiral assembly 23 rotates, the first compression channel 234 is sealed by the shell 21 to form a compression chamber, lubricating oil is sprayed into the compression chamber through the oil spraying port 22 to further seal, cool and lubricate, and as the volume of the first compression channel 234 is gradually reduced, the oil-gas mixture is compressed towards the direction of the first air outlet 214, and when the first compression channel 234 passes through the first air outlet 214, the oil-gas mixture is discharged from the compressor 100 to complete the processes of air suction, compression and air discharge.

As shown in fig. 1 to 9, the present invention also proposes a compression method of a compressor 100, comprising the steps of:

step one, starting the first rotor mechanism 2 and the second rotor mechanism 3, and allowing low-pressure gas to sequentially enter the second compression channel 243 and the first compression channel 234 from the first gas inlet 213 or the second gas inlet 31; the driving shaft 231 drives the centrifugal assembly 24 and the spiral assembly 23 to rapidly rotate in the housing 21 so as to compress the low-pressure gas;

step two, adopting an oil injection mechanism to inject oil into the shell 21 through the oil injection port 22;

and thirdly, compressing the low-pressure gas to form high-pressure gas, and discharging the high-pressure gas and oil from the exhaust port 11.

By the compression method, only the first rotor mechanism 2 and the second rotor mechanism 3 are required to be started, and then oil is injected into the shell 21, so that the operation of compressing the gas by the compressor 100 can be realized, the operation is simple, and the requirement on operators is low. The compressor 100 is generally applied to an air conditioning and refrigerating system, the low-pressure gas contains gaseous refrigerant, the gaseous refrigerant is pressurized by the compressor 100, the low-pressure gas is lifted into driven fluid machinery of high-pressure gas, the compressor 100 sucks the low-temperature low-pressure refrigerant gas from an air suction pipe, the motor is operated to drive the screw assembly 23 and the centrifugal assembly 24 to compress the low-temperature low-pressure refrigerant gas, and then the high-temperature high-pressure refrigerant gas is discharged to an exhaust pipe to provide power for the circulation of the refrigerating system.

The above examples are also not an exhaustive list based on the invention, and there may be a number of other embodiments not listed. Any substitutions and modifications made without departing from the spirit of the invention are within the scope of the invention.

Claims

1. A compressor, comprising:

2. The compressor of claim 1, wherein the screw assembly comprises a driving shaft and a screw rod, the driving shaft and the screw rod are of an integrated structure, the centrifugal assembly is sleeved outside the driving shaft, the screw rod is of a cone-shaped structure, the outer wall of the screw rod is provided with a plurality of first screw blades, and a plurality of first compression channels are formed between the first screw blades and the inner wall of the shell;

3. The compressor of claim 2, wherein the first helical blade is wound around an outer wall of the screw and is extended in a direction of an axial line of the screw.

4. The compressor of claim 2 wherein a plurality of said first compression passages are disposed in relatively isolated relation; the volume of each first compression channel gradually decreases from the first air inlet to the first air outlet.

5. The compressor of claim 2, wherein a gap is provided between an outer end of the first helical blade and an inner wall of the housing, a plurality of oil injection ports are provided in a circumferential direction of the housing, the plurality of oil injection ports are in one-to-one correspondence with the plurality of first compression passages, and the oil injection ports are communicated with the first compression passages.

6. The compressor of claim 2, wherein the housing has a first bearing seat and a second bearing seat therein, the screw having a boss adjacent the first air outlet, the boss being mounted to the first bearing seat, the drive shaft being mounted to the second bearing seat, the drive shaft being for connection to a power source.

7. The compressor of claim 6, wherein the housing has at least two connection beams disposed therein, the two connection beams being disposed opposite each other, a first end of the connection beam being secured to the housing, and a second end of the connection beam being secured to the first bearing housing or the second bearing housing.

8. The compressor of any one of claims 1 to 7, wherein the centrifugal assembly includes a wheel fixed to a maximum end of the screw assembly, and a plurality of second screw blades having first ends mounted to an inner wall of the wheel and second ends mounted to a driving shaft of the screw assembly;

9. The compressor of any one of claims 1 to 7, further comprising an adapter and a second rotor mechanism, the adapter having a discharge port, a first connection port, and a second connection port, the first connection port being disposed opposite the second connection port;

10. A compression method of a compressor, comprising the steps of:

starting the first rotor mechanism and the second rotor mechanism, and enabling low-pressure gas to sequentially enter the second compression channel and the first compression channel from the first air inlet or the second air inlet; the driving shaft drives the centrifugal component and the spiral component to rapidly rotate in the shell and is used for compressing low-pressure gas;

adopting an oil injection mechanism to spray lubricating oil into the shell through an oil injection port;

the low-pressure gas is compressed to form high-pressure gas, and the high-pressure gas and lubricating oil are discharged from the exhaust port.