CN113294337B - Screw air compressor - Google Patents

Screw air compressor Download PDF

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Publication number
CN113294337B
CN113294337B CN202110572214.6A CN202110572214A CN113294337B CN 113294337 B CN113294337 B CN 113294337B CN 202110572214 A CN202110572214 A CN 202110572214A CN 113294337 B CN113294337 B CN 113294337B
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CN
China
Prior art keywords
protective cover
motor
oil
movable base
gas separation
Prior art date
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Active
Application number
CN202110572214.6A
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Chinese (zh)
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CN113294337A (en
Inventor
赵鹏展
朱奕帆
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Shihuang Shanghai Mechanical And Electrical Industry Co ltd
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Shihuang Shanghai Mechanical And Electrical Industry Co ltd
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Priority to CN202110572214.6A priority Critical patent/CN113294337B/en
Publication of CN113294337A publication Critical patent/CN113294337A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M3/00—Portable or wheeled frames or beds, e.g. for emergency power-supply aggregates, compressor sets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)

Abstract

The invention belongs to the technical field of air compressors, in particular to a screw air compressor which comprises a motor, a compression host, an oil-gas separation tank, a movable base, an air inlet pipe, an air outlet pipe and a protective cover, wherein the oil-gas separation tank is arranged at the top of the movable base, rollers are arranged on the movable base to be in contact with the ground, and the contact part of the movable base and the oil-gas separation tank is made of elastic materials; according to the invention, the protective cover and the first curtain are arranged on the movable base, so that the motor and the compression host machine are protected by the first curtain and the protective cover, not only can the external building material slag or slag be protected, but also scalding caused by careless contact between an operator and the compression host machine and the motor in work can be avoided; and the noise generated when the motor and the compression host machine work can be effectively reduced by the protective cover and the first curtain, and the working environment of operators is further improved.

Description

Screw air compressor
Technical Field
The invention belongs to the technical field of air compressors, and particularly relates to a screw air compressor.
Background
An air compressor is a device for compressing a gas. The air compressor is similar in construction to the water pump. Most air compressors are reciprocating piston, rotary vane or rotary screw. Centrifugal compressors are very large applications. The screw compressor is one of the positive displacement compressors, and the compression of air is achieved by the change in volume of the tooth spaces of the male and female rotors which are engaged in parallel with each other in the casing. The rotor pair rotates in the casing precisely matched with the rotor pair to make the gas between the rotor tooth grooves continuously generate periodical volume change and push from the suction side to the discharge side along the rotor axis, thus completing three working processes of suction, compression and exhaust. The air compressor plays an important role in production, but the air compressor is a strong noise device. The main sources of noise of the air compressor are four parts, namely an air inlet, an air outlet, a mechanical port and an electromagnetic port. The air compressor has high noise level, outstanding low frequency, long transmission distance and large pollution range. Particularly, the frequency of certain noises is close to the natural frequency of internal organs of a person, so that resonance is caused, and symptoms such as dizziness, nausea, tachycardia, hypertension and the like are generated in the person, so that the work and life quality of the person are reduced, and safety accidents and interpersonal relationship contradictions are easy to generate. Therefore, the noise control of the air compressor is not only an important problem of labor protection and environmental protection, but also an important problem of sustainable healthy development of production enterprises, so that the noise reduction of the air compressor and the noise treatment are particularly important.
In the prior art, a patent also appears about a technical scheme of a box-type screw air compressor, for example, a Chinese patent with the application number of CN2013103125235 discloses a box-type screw air compressor, and belongs to the technical field of machinery. The problems that the noise is too large and the replacement of parts is inconvenient in the existing box-type screw air compressor are solved. The box-mounted screw air compressor comprises a chassis base, a chassis box body arranged on the chassis base, a motor arranged in the chassis box body, a screw compression host, an oil-gas separation barrel, an air filter and a cooling device, wherein the interior of the chassis box body is divided into two independent chambers which can respectively circulate and cool the screw compression host and the cooling device, the oil-gas separation barrel is arranged on one corner of the chassis base, and a corner door is arranged at the position of the chassis box body corresponding to the oil-gas separation barrel. The case body is divided into two independent chambers, so that the mutual interference of air flows in the compressor is avoided, and the noise is reduced. The structure is ingenious, the noise reduction effect and the cooling effect are good, and the maintenance is more convenient; however, the invention still has the defect that the invention is not applicable to the occasion that the outdoor environment needs to be moved at any time, and is not easy to transport and difficult to detach; the middle-sized and small-sized screw air compressor in the prior art is suitable for outdoor environment, and the bottom is provided with the mobile device, so that the mobile transportation is facilitated, but in order to reduce the weight, the motor and the compression device of the air compressor are always directly exposed, the noise is larger in the use process, the normal work of surrounding operators is influenced, and the hearing of the surrounding operators is easily damaged after long-term continuous operation; so that this solution is limited.
In view of the above, the present invention solves the above-mentioned problems by providing a screw air compressor.
Disclosure of Invention
In order to make up the deficiency of the prior art, solve motor and compression host of the existing small and medium-sized screw air compressor and directly expose outside, while working outdoors, the noise produced by the screw air compressor has caused the bad influence to the surrounding operator; the invention provides a screw air compressor.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a screw air compressor, which comprises a motor, a compression host, an oil-gas separation tank, a movable base, an air inlet pipe, an air outlet pipe and a protective cover, wherein the oil-gas separation tank is connected with the top of the movable base through bolts; the motor and the compression host are respectively connected with the top of the oil-gas separation tank through bolts; the air inlet pipe is fixedly connected to the compression host and communicated with the interior of the compression host, the air outlet pipe is fixedly connected to the oil-gas separation tank and communicated with the interior of the oil-gas separation tank, the end part of the air inlet pipe is connected with a resistance muffler in a buckling manner, and the end part of the air outlet pipe is connected with a small hole muffler in a flange manner; the part of the protective cover, which is close to the motor, is an acoustic board, the end parts of the two sides of the protective cover are bent downwards and are provided with clamping blocks, the part of the upper surface of the movable base, which corresponds to the clamping blocks, is provided with clamping grooves, the protective cover is arranged on the movable base, the clamping blocks are embedded into the clamping grooves, and the part, which is contacted with the clamping blocks, of the inner surface of the clamping grooves is made of elastic materials; the parts of the end parts of the protective cover, which are close to the two ends of the oil-gas separation tank, are respectively provided with a storage groove, and the storage grooves are connected with the end parts of the protective cover through bolts; the storage groove is embedded with a storage roller, the storage roller is wound with a first curtain, the first curtain is made of sound-absorbing sponge, the storage roller is rotationally connected with the inside of the storage groove through a first shaft, and the end part of the first shaft extends out of the side wall of the storage groove and is fixedly connected with a rotating rod; the bottom of the first curtain is uniformly and fixedly connected with a plurality of fixing ropes, and the corresponding part of the lower surface of the movable base is uniformly and fixedly connected with a plurality of fixing rods.
When the air compressor works, after the screw air compressor is transported to a working site through a vehicle, the whole air compressor is quickly moved to a specific working site by pushing the roller on the movable base to rotate, and then the air outlet pipe is connected with related equipment and is powered on; starting the motor to drive the compression host to operate, enabling air to enter the compression host through the air inlet pipe, compressing the air under the action of a rotating screw rod in the compression host, and enabling the compressed air to flow into the oil-gas separation tank; then, oil gas in the compressed air is separated through the action of the oil-gas separation tank, and finally purified compressed air is discharged into relevant equipment through an air outlet pipe to play a role; in the working process of the middle and small air compressors in the market, the motor and the compression host are completely exposed, which is beneficial to reducing weight and heat dissipation, but noise and vibration generated in the working process easily influence surrounding operators, and cause harm to the bodies of the operators; therefore, the part of the movable base, which is contacted with the oil-gas separation tank, is made of an elastic material, when the air compressor works, vibration generated in the work of the oil-gas separation tank is transmitted to the movable base, and the part of the movable base, which is contacted with the oil-gas separation tank, is subjected to compression elastic deformation, so that the vibration generated by the oil-gas separation tank is relieved, on one hand, the abrasion of the combined part of the oil-gas separation tank and the movable base is reduced, and the service lives of the oil-gas separation tank and the movable base are prolonged; on the other hand, noise generated by vibration between the oil-gas separation tank and the movable base is reduced, and the working environment of on-site operators is improved; when the screw air compressor is applied to an environment of building construction or mining, in order to prevent damage to the air compressor caused by external building material slag or slag, the protective cover is arranged on the movable base, the first curtain is pulled down by rotating the rotating rod, and the fixed rope on the first curtain is fixed with the fixed shaft under the movable base, so that the motor and the compression host equipment on the movable base are protected by the first curtain and the protective cover, the external building material slag or slag can be protected, operators can be prevented from being carelessly contacted with the compression host and the motor which are scalded by the work, and further scalding of the operators is avoided; the part of the protective cover, which is close to the motor, is a sound-absorbing plate structure, and the first curtain is made of sound-absorbing sponge, so that noise generated when the motor and the air compressor compress a main machine to work can be effectively reduced, and the working environment of operators is further improved; the protective cover can be easily detached, transported separately and assembled in a working place, so that convenience in transportation and use is greatly improved; when the weather is hot and the heat generated by the motor during operation is high, the first curtain can be rolled into the storage roller, and because the temperature inside the protective cover is high, the outside air flows into the protective cover from one side and flows from the other side under the action of temperature difference, and equipment inside the protective cover is cooled; after the temperature of the equipment in the protective cover is effectively controlled, the first curtain is put down; in addition, the air inlet pipe of the air compressor extends out of the protective cover to absorb air, noise at the air inlet part of the air compressor is of low-frequency characteristic, so that noise reduction is carried out by installing a resistant silencer on the air inlet pipe, and the air outlet part of the air compressor is of high air pressure and high flow speed, so that noise reduction is carried out by installing a small-hole silencer, and noise generated by the screw air compressor is further reduced; after the work is finished, the protective cover is detached and transported separately from other parts, and the air compressor is transported to the next working place.
Preferably, the protective cover is of a double-layer plate structure, and a sound insulation cavity is formed at a gap part between the double-layer plates.
During operation, part of noise generated by the motor is transmitted to the side wall of the protective cover in the working process, the side wall of the protective cover is of a sound-absorbing plate structure, sound waves are effectively absorbed by the porous structure of the sound-absorbing plate, when the sound waves are transmitted to the sound-insulating cavity, the sound waves are transmitted to the air in the sound-insulating cavity, and after the sound waves pass through the sound-insulating cavity, the sound waves are transmitted to the side wall of the protective cover again and finally transmitted to the outside through the side wall of the protective cover; in the above-mentioned in-process, the sound wave is transmitted to the air in the sound insulation chamber from the protection casing lateral wall, is transmitted to the protection casing lateral wall by the air again, and the in-process that transmits between the medium of different materials, the loss that the energy of sound wave received is great to the speed that the sound wave transmitted in the air is slower, and the energy of sound wave is further consumed, consequently forms the sound insulation chamber through the bilayer board setting, makes the protection casing have further reduced the noise that inside motor and compression host computer during operation produced, has further improved the near operating personnel's of air compressor machine comfort level.
Preferably, a plurality of first pads are uniformly arranged in the sound insulation cavity, the edge parts of the first pads are fixedly connected with the inner surface of the sound insulation cavity through glue, each first pad is composed of sound insulation pads which are overlapped in multiple layers, and the adjacent layers are adhered and fixed through glue smeared on the edge parts of the sound insulation pads.
When the sound insulation protective cover works, the first pad is uniformly arranged in the sound insulation cavity, and when the outside of the protective cover is impacted greatly, the first pad plays a role in supporting and fixing the side wall of the protective cover in the sound insulation cavity, so that the structural strength of the side wall of the protective cover is improved; in the working process of the screw air compressor, when noise sound waves in the protective cover pass through the sound insulation cavity, part of the sound waves pass through the first pad, and the first pad is obtained by overlapping multiple layers of sound insulation pads; on the one hand, when the sound wave passes through the first pad, a part of energy of the sound wave is absorbed by the first pad, and on the other hand, when the sound wave continuously passes through the sound insulation pads of different layers in the first pad and the gap area between the sound insulation pads, the energy of the sound wave is further consumed; therefore, the protective cover is arranged in a double-layer manner, and the first pad is filled in the gap between the double layers, so that the weight of the protective cover is effectively controlled, the sound insulation effect of the protective cover is improved, and the working environment of operators is further improved.
Preferably, the motor and the compression host are both provided with temperature sensors, and the motor and the compression host are connected with the temperature sensors through bolts; a cooling fan is arranged below the storage groove close to the motor, the cooling fan is connected with the side wall of the protective cover through bolts, a controller is connected with the inside of the cooling fan through bolts, the controller is electrically connected with the temperature sensor, and the controller is used for receiving information of the temperature sensor and controlling the cooling fan to start; the cooling fan is opposite to the motor, a plurality of cooling grooves are uniformly formed in the side wall of the protective cover, close to the motor and the compression main machine, and sound-absorbing sponge blocks are embedded in the cooling grooves; the first curtain comprises a left sheet and a right sheet, the left sheet and the right sheet are arranged on the storage roller in parallel, and the fixing rope is an elastic rope.
When the motor and the compression host machine work for a long time and the accumulated heat is more so that the temperature is too high, the temperature sensor transmits temperature information to a controller in the cooling fan, the controller controls the cooling fan to start, and flowing air flow is generated after the cooling fan is started to cool the motor and the compression host machine; the left sheet and the right sheet are stressed and deformed under the action of air flow generated by the cooling fan, and the fixed ropes at the bottom of the first sheet are elastically stretched, so that the part, close to the cooling fan, of the gap between the left sheet and the right sheet is enlarged to form a ventilation gap, and the outside air can flow in from the ventilation gap at one side and flow out from the ventilation gap at the other side, so that the air flow rate in the protective cover is increased, the motor and the compression host are further cooled, and the normal work of the air compressor is ensured; because the side wall of the protective cover is uniformly provided with a plurality of cooling grooves, when the cooling fan is not started, the sound-absorbing sponge blocks are embedded in the cooling grooves, so that the noise in the protective cover is further controlled; after the cooling fan is started, in order to strengthen the control of the temperature inside the protective cover, the sound-absorbing sponge block is detached, and because the air flow velocity inside the protective cover is large, the outside air flows in through the cooling groove under the action of air pressure, so that the flowing air flow inside the protective cover is further enhanced, the motor and the compression host inside the protective cover are further cooled, and the normal work of the air compressor is ensured; after the temperatures of the compression main machine and the motor are effectively controlled, the controller turns off the cooling fan, and the first curtain is reset under the elastic recovery action of the fixed rope at the moment, so that the air compressor continuously plays a role in sound insulation.
Preferably, a plurality of pairs of fixed magnets are arranged on the opposite side walls of the left piece and the right piece, and the fixed magnets are fixedly adhered to the surfaces of the left piece and the right piece through glue, and the fixed magnets corresponding to each other are combined with each other; the fixed magnet is an electromagnet, and the power supply of the fixed magnet is controlled by a controller in the cooling fan.
During operation, in the working process of the air compressor, the left piece and the right piece on the first curtain are kept in close contact under the mutual attraction action of the fixed magnets, so that the first curtain is guaranteed to have a sound insulation effect on the inside of the protective cover; when the cooling fan is started, the cooling fan cuts off the power of the electromagnet on the first curtain, which is close to the cooling fan, so that the attraction effect of the fixed magnets on the left and right sheets, which are close to the cooling fan, is eliminated, and at the moment, the gap between the left and right sheets is increased at the position, which is close to the motor, and a ventilation gap is formed, so that the flow of outside air is facilitated; after cooling fan closes, the controller in the cooling fan makes the fixed magnet that is close to cooling fan position on a curtain, and the fixed magnet that separates each other on left side piece and the right side piece combines again this moment, guarantees that a curtain in time resumes the original form after cooling fan closes, and the sound insulation effect to the inside normal play of protection casing, avoids appearing dislocation in a deformation recovery in-process of curtain, causes the ventilation gap between left side piece and the right side piece unable in time to eliminate, has influenced the sound insulation effect of a curtain to the protection casing inside.
Preferably, the surfaces of the left sheet and the right sheet, which are close to the outer sides, are respectively provided with a first groove, and the end parts of the first grooves point to the parts, which are close to the motor, in the gap between the left sheet and the right sheet.
When the gap between the left sheet and the right sheet, which is close to the cooling fan, is increased, the surfaces of the left sheet and the right sheet, which are close to the outside, are recessed, and air contacting with the recessed surfaces of the left sheet and the right sheet flows along the first groove in a direction which is close to the cooling fan, so that the air flow passing through the gap between the left sheet and the right sheet is further enhanced, and the motor and the compression host inside the protective cover are further cooled.
The beneficial effects of the invention are as follows:
1. according to the screw air compressor, the protective cover is arranged on the movable base, and the first curtain in the storage groove is pulled down, so that the motor and the compression host equipment which are positioned on the movable base are protected by the first curtain and the protective cover, not only can the external building material slag or slag be protected, but also scalding caused by careless contact between an operator and the compression host and the motor in work can be avoided; and the noise generated when the motor and the air compressor compress the main machine to work can be effectively reduced by the protective cover and the first curtain, and the working environment of operators is further improved.
2. According to the screw air compressor, the plurality of first pads are uniformly arranged in the sound insulation cavity, when the screw air compressor works, noise sound waves in the protective cover pass through the first pads, part of energy of the sound waves is absorbed by the first pads, and when the sound waves continuously pass through the sound insulation pads of different layers in the first pads and a gap area between the sound insulation pads, the energy of the sound waves is further consumed; therefore, the protective cover is arranged in a double-layer manner and is filled with the first pad, so that the weight of the protective cover is effectively controlled, and the sound insulation effect of the protective cover is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a partial enlarged view at B in FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C;
FIG. 5 is a schematic view of FIG. 1 with one side of the receiving slot removed;
FIG. 6 is a partial enlarged view at D in FIG. 5;
FIG. 7 is an enlarged view of a portion of FIG. 5 at E;
in the figure: the motor 1, the compression host 2, the oil-gas separation tank 3, the moving base 4, the roller 41, the clamping groove 42, the fixing rod 43, the air inlet pipe 5, the air outlet pipe 6, the protective cover 7, the clamping block 71, the sound insulation cavity 72, the first pad 73, the sound insulation pad 731, the cooling fan 74, the cooling groove 75, the sound absorption sponge block 751, the storage groove 8, the storage roller 81, the first shaft 811, the rotating rod 812, the first curtain 82, the fixing rope 821, the left piece 822, the right piece 823, the fixing magnet 824 and the first groove 825.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 7, the screw air compressor of the present invention comprises a motor 1, a compression host 2, an oil-gas separation tank 3, a movable base 4, an air inlet pipe 5, an air outlet pipe 6 and a protective cover 7, wherein the top of the oil-gas separation tank 3 is connected with the top of the movable base 4 through bolts, a roller 41 is rotatably connected to the movable base 4 and is in contact with the ground, and the contact part of the movable base 4 and the oil-gas separation tank 3 is made of elastic materials; the motor 1 and the compression host 2 are respectively connected with the top of the oil-gas separation tank 3 through bolts; the air inlet pipe 5 is fixedly connected to the compression host 2 and communicated with the interior of the compression host 2, the air outlet pipe 6 is fixedly connected to the oil-gas separation tank 3 and communicated with the interior of the oil-gas separation tank 3, the end part of the air inlet pipe 5 is connected with a resistance muffler in a buckling manner, and the end part of the air outlet pipe 6 is connected with a small hole muffler in a flange manner; the part of the protective cover 7, which is close to the motor 1, is an acoustic board, the end parts of the two sides of the protective cover 7 are bent downwards and are provided with clamping blocks 71, the part of the upper surface of the movable base 4, which corresponds to the clamping blocks 71, is provided with clamping grooves 42, the protective cover 7 is arranged on the movable base 4, the clamping blocks 71 are embedded into the clamping grooves 42, and the part, which is contacted with the clamping blocks 71, of the inner surface of the clamping grooves 42 is made of elastic materials; the parts, close to the two ends of the oil-gas separation tank 3, of the end parts of the protective cover 7 are respectively provided with a storage groove 8, and the storage grooves 8 are connected with the end parts of the protective cover 7 through bolts; the storage groove 8 is embedded with a storage roller 81, the storage roller 81 is wound with a first curtain 82, the first curtain 82 is made of sound-absorbing sponge, the storage roller 81 is rotationally connected with the inside of the storage groove 8 through a first shaft 811, and the end part of the first shaft 811 extends out of the side wall of the storage groove 8 and is fixedly connected with a rotating rod 812; a plurality of fixing ropes 821 are uniformly and fixedly connected to the bottom of the first curtain 82, and a plurality of fixing rods 43 are uniformly and fixedly connected to corresponding parts of the lower surface of the movable base 4.
When the air compressor works, after the screw air compressor is transported to a working site through a vehicle, the whole air compressor is quickly moved to a specific working site by pushing the roller 41 on the movable base 4 to rotate, and then the air outlet pipe 6 is connected with related equipment and is powered on by the power supply of the motor 1; starting the motor 1, so that the motor 1 drives the compression host 2 to operate, air enters the compression host 2 through the air inlet pipe 5 and is compressed under the action of a rotating screw rod in the compression host 2, and the compressed air flows into the oil-gas separation tank 3; then, oil gas in the compressed air is separated out under the action of the oil-gas separation tank 3, and finally purified compressed air is discharged into relevant equipment through the air outlet pipe 6 to play a role; in the working process of the middle and small air compressors in the market, the motor 1 and the compression host 2 are completely exposed, which is beneficial to reducing weight and heat dissipation, but noise and vibration generated in the working process easily influence surrounding operators, and cause harm to the bodies of the operators; therefore, the part, which is in contact with the oil-gas separation tank 3, on the movable base 4 is made of an elastic material, when the air compressor works, vibration generated in the work of the oil-gas separation tank 3 is transmitted to the movable base 4, and the part, which is in contact with the oil-gas separation tank 3, of the movable base 4 is subjected to compression elastic deformation, so that the vibration generated by the oil-gas separation tank 3 is relieved, on one hand, the abrasion of the combined part of the oil-gas separation tank 3 and the movable base 4 is reduced, and the service life of the oil-gas separation tank 3 and the movable base 4 is prolonged; on the other hand, noise generated by vibration between the oil-gas separation tank 3 and the movable base 4 is reduced, and the working environment of on-site operators is improved; when the screw air compressor is applied to the environment of building construction or mining, in order to prevent the damage of external building material slag or slag to the air compressor, the protective cover 7 is arranged on the movable base 4, the rotary rod 812 is rotated to pull down the first curtain 82, the fixed rope 821 on the first curtain 82 is fixed with the fixed shaft under the movable base 4, so that the motor 1 and the compression host 2 equipment on the movable base 4 are protected by the first curtain 82 and the protective cover 7, the external building material slag or slag can be protected, and operators can be prevented from being carelessly contacted with the compression host 2 and the motor 1 which are heated by working, and further, scalding of the operators is avoided; the part of the protective cover 7, which is close to the motor 1, is an acoustic panel structure, and the first curtain 82 is made of acoustic sponge, so that noise generated when the motor 1 and the air compressor compress the main machine 2 to work can be effectively reduced, and the working environment of operators is further improved; the protective cover 7 can be easily detached, transported separately and assembled in a working place, so that convenience in transportation and use is greatly improved; when the weather is hot and the heat generated by the motor 1 during operation is high, the first curtain 82 can be rolled into the storage roller 81, and because the temperature inside the protective cover 7 is high, the outside air flows into the protective cover 7 from one side and flows from the other side due to the temperature difference effect, and the equipment inside the protective cover 7 is cooled; after the temperature of the equipment in the protective cover 7 is effectively controlled, the first curtain 82 is put down; in addition, the air inlet pipe 5 of the air compressor extends out of the protective cover 7 to absorb air, and noise at the air inlet part of the air compressor is of low-frequency characteristic, so that noise reduction treatment is carried out by installing a resistant silencer on the air inlet pipe 5, and the air outlet part of the air compressor is of high air pressure and high flow speed, so that noise reduction treatment is carried out by installing a small-hole silencer, and noise generated by the screw air compressor is further reduced; after the work is finished, the protective cover 7 is detached and transported separately from other parts, and the air compressor is transported to the next work place.
As a specific embodiment of the present invention, the protective cover 7 has a double-layer plate structure, and a sound insulation cavity 72 is formed at a gap portion between the double-layer plates.
During operation, part of noise generated by the motor 1 is transmitted to the side wall of the protective cover 7 during operation, the side wall of the protective cover 7 is of a sound-absorbing plate structure, sound waves are effectively absorbed by the porous structure of the sound-absorbing plate, when the sound waves are transmitted to the sound-insulating cavity 72, the sound waves are transmitted to the air inside the sound-insulating cavity 72, after the sound waves pass through the sound-insulating cavity 72, the sound waves are transmitted to the side wall of the protective cover 7 again, and finally the sound waves are transmitted to the outside through the side wall of the protective cover 7; in the above process, the sound wave is transferred from the side wall of the protection cover 7 to the air in the sound insulation cavity 72, and then is transferred to the side wall of the protection cover 7 by the air, so that the loss of the energy of the sound wave is larger in the process of transferring between media of different materials, the speed of transferring the sound wave in the air is slower, the energy of the sound wave is further consumed, and therefore, the sound insulation cavity 72 is formed through the double-layer plate, so that the noise generated during the working of the internal motor 1 and the compression host 2 is further reduced by the protection cover 7, and the comfort level of operators near the air compressor is further improved.
As a specific embodiment of the present invention, a plurality of first pads 73 are uniformly disposed in the sound insulation cavity 72, edge portions of the first pads 73 are fixedly connected with the inner surface of the sound insulation cavity 72 through glue, each first pad 73 is composed of a plurality of sound insulation pads 731 which are overlapped, and the adjacent sound insulation pads 731 are adhered and fixed through glue smeared on the edge portions.
When the sound insulation cavity 72 works, the first pad 73 is uniformly arranged in the sound insulation cavity 72, and when the outside of the protective cover 7 is impacted greatly, the first pad 73 plays a role in supporting and fixing the side wall of the protective cover 7 in the sound insulation cavity 72, so that the structural strength of the side wall of the protective cover 7 is improved; and during the operation of the screw air compressor, when noise sound waves in the protective cover 7 pass through the sound insulation cavity 72, a part of sound waves pass through the first pad 73, and the first pad 73 is obtained by overlapping a plurality of layers of sound insulation pads 731; on the one hand, a part of the energy of the sound wave is absorbed by the first pad 73 while passing through the first pad 73, and on the other hand, the energy of the sound wave is further consumed while continuously passing through the sound insulation pads 731 of different layers in the first pad 73 and the gap area between the sound insulation pads 731; therefore, the protective cover 7 is arranged in a double-layer mode, the first pad 73 is filled in a gap between the double layers, so that the weight of the protective cover 7 is effectively controlled, the sound insulation effect of the protective cover 7 is improved, and the working environment of operators is further improved.
As a specific embodiment of the present invention, temperature sensors are disposed on the motor 1 and the compression host 2, and the motor 1 and the compression host 2 are connected with the temperature sensors through bolts; a cooling fan 74 is arranged below the storage groove 8 close to the motor 1, the cooling fan 74 is connected with the side wall of the protective cover 7 through bolts, a controller is connected with the inside of the cooling fan 74 through bolts, the controller is electrically connected with a temperature sensor, and the controller is used for receiving information of the temperature sensor and controlling the cooling fan 74 to start; the cooling fan 74 is opposite to the motor 1, a plurality of cooling grooves 75 are uniformly formed in the side wall of the protective cover 7, close to the motor 1 and the compression main machine 2, and sound-absorbing sponge blocks 751 are embedded in the cooling grooves 75; the first curtain 82 includes a left sheet 822 and a right sheet 823, the left sheet 822 and the right sheet 823 are mounted in parallel on the receiving roller 81, and the fixing cord 821 is an elastic cord.
When the motor 1 and the compression host 2 work for a long time and the accumulated heat is more so that the temperature is too high, the temperature sensor transmits temperature information to a controller in the cooling fan 74, the controller controls the cooling fan 74 to start, and flowing air flow is generated after the cooling fan 74 is started to cool the motor 1 and the compression host 2; because the first curtain 82 is divided into the left piece 822 and the right piece 823, the left piece 822 and the right piece 823 are stressed and deformed under the action of air flow generated by the cooling fan 74, and the fixed rope 821 at the bottom of the first curtain 82 is elastically stretched, the part, close to the cooling fan 74, of the gap between the left piece 822 and the right piece 823 is enlarged to form a ventilation gap, so that external air can flow in from the ventilation gap at one side and flow out from the ventilation gap at the other side, the air flow rate in the protective cover 7 is increased, the motor 1 and the compression host 2 are further cooled, and the normal operation of the air compressor is ensured; because the side wall of the protective cover 7 is uniformly provided with a plurality of cooling grooves 75, when the cooling fan 74 is not started, the sound-absorbing sponge blocks 751 are embedded in the cooling grooves 75, so that noise in the protective cover 7 is further controlled; after the cooling fan 74 is started, in order to enhance the control of the internal temperature of the protective cover 7, the sound absorbing sponge block 751 is detached, and because the air flow rate in the protective cover 7 is high, the external air flows in through the cooling groove 75 under the action of air pressure, so that the flowing air flow in the protective cover 7 is further enhanced, the motor 1 and the compression host 2 in the protective cover 7 are further cooled, and the normal operation of the air compressor is ensured; after the temperatures of the compression host 2 and the motor 1 are effectively controlled, the controller turns off the cooling fan 74, and the first curtain 82 is reset under the elastic recovery action of the fixed rope 821, so that the air compressor continues to have the sound insulation function.
As a specific embodiment of the present invention, a plurality of pairs of fixing magnets 824 are disposed on opposite side walls of the left plate 822 and the right plate 823, and the fixing magnets 824 are fixedly adhered to the surfaces of the left plate 822 and the right plate 823 by glue, and the fixing magnets 824 corresponding to each other are combined with each other; the fixed magnet 824 is an electromagnet, and the power supply of the fixed magnet 824 is controlled by a controller in the cooling fan 74.
During operation, in the working process of the air compressor, the left piece 822 and the right piece 823 on the first curtain 82 are kept in close contact under the mutual attraction of the fixed magnets 824, so that the first curtain 82 is guaranteed to have a sound insulation effect on the inside of the protective cover 7; when the cooling fan 74 is started, the cooling fan 74 de-energizes the electromagnet on the first curtain 82 near the cooling fan 74, so that the attraction of the fixed magnets 824 on the left plate 822 and the right plate 823 near the cooling fan 74 is eliminated, and at the moment, the gap between the left plate 822 and the right plate 823 is increased near the motor 1, and a ventilation gap is formed, so that the flow of outside air is facilitated; after the cooling fan 74 is closed, the controller in the cooling fan 74 enables the fixed magnet 824 on the first curtain 82, which is close to the cooling fan 74, to be electrified, and at the moment, the fixed magnet 824 on the left sheet 822 and the right sheet 823, which are mutually separated, are recombined, so that the first curtain 82 is guaranteed to be restored to the original state in time after the cooling fan 74 is closed, the sound insulation function is normally exerted inside the protective cover 7, dislocation of the left sheet 822 and the right sheet 823 in the deformation recovery process of the first curtain 82 is avoided, the ventilation gap between the left sheet 822 and the right sheet 823 cannot be eliminated in time, and the sound insulation effect of the first curtain 82 on the inside of the protective cover 7 is influenced.
As a specific embodiment of the present invention, the surfaces of the left plate 822 and the right plate 823, which are close to the outer side, are provided with a first slot 825, and the ends of the first slot 825 are directed to a position close to the motor 1 in the gap between the left plate 822 and the right plate 823.
In operation, when the gap between the left and right plates 822, 823 near the cooling fan 74 increases, the surfaces of the left and right plates 822, 823 near the outside are recessed, and air in contact with the recessed surfaces of the left and right plates 822, 823 flows along the first slot 825 in a direction near the cooling fan 74 by the guiding action of the first slot 825, so that the air flow through the gap between the left and right plates 822, 823 is further enhanced, and the motor 1 and the compression host 2 inside the protection cover 7 are further cooled.
The specific working procedure is as follows:
after the screw air compressor is transported to a working site through a vehicle, the whole air compressor is quickly moved to a specific working site by pushing the roller 41 on the movable base 4 to rotate, and then the air outlet pipe 6 is connected with related equipment and is powered on by the power supply of the motor 1; starting the motor 1, so that the motor 1 drives the compression host 2 to operate, air enters the compression host 2 through the air inlet pipe 5 and is compressed under the action of a rotating screw rod in the compression host 2, and the compressed air flows into the oil-gas separation tank 3; then, oil gas in the compressed air is separated out under the action of the oil-gas separation tank 3, and finally purified compressed air is discharged into relevant equipment through the air outlet pipe 6 to play a role; in the working process of the middle and small air compressors in the market, the motor 1 and the compression host 2 are completely exposed, which is beneficial to reducing weight and heat dissipation, but noise and vibration generated in the working process easily influence surrounding operators, and cause harm to the bodies of the operators; therefore, the part, which is in contact with the oil-gas separation tank 3, on the movable base 4 is made of an elastic material, when the air compressor works, vibration generated in the work of the oil-gas separation tank 3 is transmitted to the movable base 4, and the part, which is in contact with the oil-gas separation tank 3, of the movable base 4 is subjected to compression elastic deformation, so that the vibration generated by the oil-gas separation tank 3 is relieved, on one hand, the abrasion of the combined part of the oil-gas separation tank 3 and the movable base 4 is reduced, and the service life of the oil-gas separation tank 3 and the movable base 4 is prolonged; on the other hand, noise generated by vibration between the oil-gas separation tank 3 and the movable base 4 is reduced, and the working environment of on-site operators is improved; when the screw air compressor is applied to the environment of building construction or mining, in order to prevent the damage of external building material slag or slag to the air compressor, the protective cover 7 is arranged on the movable base 4, the rotary rod 812 is rotated to pull down the first curtain 82, the fixed rope 821 on the first curtain 82 is fixed with the fixed shaft under the movable base 4, so that the motor 1 and the compression host 2 equipment on the movable base 4 are protected by the first curtain 82 and the protective cover 7, the external building material slag or slag can be protected, and operators can be prevented from being carelessly contacted with the compression host 2 and the motor 1 which are heated by working, and further, scalding of the operators is avoided; the part of the protective cover 7, which is close to the motor 1, is an acoustic panel structure, and the first curtain 82 is made of acoustic sponge, so that noise generated when the motor 1 and the air compressor compress the main machine 2 to work can be effectively reduced, and the working environment of operators is further improved; the protective cover 7 can be easily detached, transported separately and assembled in a working place, so that convenience in transportation and use is greatly improved; when the weather is hot and the heat generated by the motor 1 during operation is high, the first curtain 82 can be rolled into the storage roller 81, and because the temperature inside the protective cover 7 is high, the outside air flows into the protective cover 7 from one side and flows from the other side due to the temperature difference effect, and the equipment inside the protective cover 7 is cooled; after the temperature of the equipment in the protective cover 7 is effectively controlled, the first curtain 82 is put down; in addition, the air inlet pipe 5 of the air compressor extends out of the protective cover 7 to absorb air, and noise at the air inlet part of the air compressor is of low-frequency characteristic, so that noise reduction treatment is carried out by installing a resistant silencer on the air inlet pipe 5, and the air outlet part of the air compressor is of high air pressure and high flow speed, so that noise reduction treatment is carried out by installing a small-hole silencer, and noise generated by the screw air compressor is further reduced; after the work is finished, the protective cover 7 is detached and transported separately from other parts, and the air compressor is transported to the next working place; when the outside of the protective cover 7 is subjected to large impact, the first pad 73 plays a role in supporting and fixing the side wall of the protective cover 7 in the sound insulation cavity 72, so that the structural strength of the side wall of the protective cover 7 is improved; and during the operation of the screw air compressor, when noise sound waves in the protective cover 7 pass through the sound insulation cavity 72, a part of sound waves pass through the first pad 73, and the first pad 73 is obtained by overlapping a plurality of layers of sound insulation pads 731; on the one hand, a part of the energy of the sound wave is absorbed by the first pad 73 while passing through the first pad 73, and on the other hand, the energy of the sound wave is further consumed while continuously passing through the sound insulation pads 731 of different layers in the first pad 73 and the gap area between the sound insulation pads 731; therefore, the protective cover 7 is arranged in a double-layer manner, and the first pad 73 is filled in the gap between the double layers, so that the weight of the protective cover 7 is effectively controlled, the sound insulation effect of the protective cover 7 is improved, and the working environment of operators is further improved; when the motor 1 and the compression host 2 work for a long time and the accumulated heat is more so that the temperature is too high, the temperature sensor transmits temperature information to a controller in the cooling fan 74, the controller controls the cooling fan 74 to start, and flowing air flow is generated after the cooling fan 74 starts to cool the motor 1 and the compression host 2; because the first curtain 82 is divided into the left piece 822 and the right piece 823, the left piece 822 and the right piece 823 are stressed and deformed under the action of air flow generated by the cooling fan 74, and the fixed rope 821 at the bottom of the first curtain 82 is elastically stretched, the part, close to the cooling fan 74, of the gap between the left piece 822 and the right piece 823 is enlarged to form a ventilation gap, so that external air can flow in from the ventilation gap at one side and flow out from the ventilation gap at the other side, the air flow rate in the protective cover 7 is increased, the motor 1 and the compression host 2 are further cooled, and the normal operation of the air compressor is ensured; because the side wall of the protective cover 7 is uniformly provided with a plurality of cooling grooves 75, when the cooling fan 74 is not started, the sound-absorbing sponge blocks 751 are embedded in the cooling grooves 75, so that noise in the protective cover 7 is further controlled; after the cooling fan 74 is started, in order to enhance the control of the internal temperature of the protective cover 7, the sound absorbing sponge block 751 is detached, and because the air flow rate in the protective cover 7 is high, the external air flows in through the cooling groove 75 under the action of air pressure, so that the flowing air flow in the protective cover 7 is further enhanced, the motor 1 and the compression host 2 in the protective cover 7 are further cooled, and the normal operation of the air compressor is ensured; after the temperatures of the compression host 2 and the motor 1 are effectively controlled, the controller turns off the cooling fan 74, and the first curtain 82 is reset under the elastic recovery action of the fixed rope 821, so that the air compressor continues to have the sound insulation function.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (2)

1. A screw air compressor, characterized by: the oil-gas separation device comprises a motor (1), a compression host (2), an oil-gas separation tank (3), a movable base (4), an air inlet pipe (5), an air outlet pipe (6) and a protective cover (7), wherein the oil-gas separation tank (3) is connected with the top of the movable base (4) through bolts, a roller (41) is rotationally connected to the movable base (4) and is in contact with the ground, and the contact part of the movable base (4) and the oil-gas separation tank (3) is made of elastic materials; the motor (1) and the compression host (2) are respectively connected with the top of the oil-gas separation tank (3) through bolts; the air inlet pipe (5) is fixedly connected to the compression host machine (2) and is communicated with the interior of the compression host machine (2), the air outlet pipe (6) is fixedly connected to the oil-gas separation tank (3) and is communicated with the interior of the oil-gas separation tank (3), the end part of the air inlet pipe (5) is connected with a resistance muffler in a buckling manner, and the end part of the air outlet pipe (6) is connected with a small-hole muffler in a flange manner; the part of the protective cover (7) close to the motor (1) is an acoustic board, the end parts of the two sides of the protective cover (7) are bent downwards and are provided with clamping blocks (71), clamping grooves (42) are formed in the positions, corresponding to the clamping blocks (71), of the upper surface of the movable base (4), the protective cover (7) is arranged on the movable base (4), the clamping blocks (71) are embedded into the clamping grooves (42), and the parts, in contact with the clamping blocks (71), of the inner surface of the clamping grooves (42) are made of elastic materials; the parts, close to the two ends of the oil-gas separation tank (3), of the end parts of the protective cover (7) are respectively provided with a storage groove (8), and the storage grooves (8) are connected with the end parts of the protective cover (7) through bolts; the storage groove (8) is internally embedded with a storage roller (81), the storage roller (81) is wound with a first curtain (82), the first curtain (82) is made of sound-absorbing sponge, the storage roller (81) is rotationally connected with the inside of the storage groove (8) through a first shaft (811), and the end part of the first shaft (811) extends out of the side wall of the storage groove (8) and is fixedly connected with a rotating rod (812); a plurality of fixing ropes (821) are uniformly and fixedly connected to the bottom of the first curtain (82), and a plurality of fixing rods (43) are uniformly and fixedly connected to corresponding parts of the lower surface of the movable base (4);
the protective cover (7) is of a double-layer plate structure, and a sound insulation cavity (72) is formed at a gap part between the double-layer plates;
a plurality of first pads (73) are uniformly arranged in the sound insulation cavity (72), the edge parts of the first pads (73) are fixedly connected with the inner surface of the sound insulation cavity (72) through glue, each first pad (73) is composed of a plurality of layers of sound insulation pads (731) which are overlapped, and the adjacent layers of sound insulation pads (731) are adhered and fixed through glue smeared at the edge parts;
temperature sensors are arranged on the motor (1) and the compression host (2), and the motor (1) and the compression host (2) are connected with the temperature sensors through bolts; a cooling fan (74) is arranged below the storage groove (8) close to the motor (1), the cooling fan (74) is connected with the side wall of the protective cover (7) through bolts, a controller is connected with the inside of the cooling fan (74) through bolts, the controller is electrically connected with the temperature sensor, and the controller is used for receiving information of the temperature sensor and controlling the cooling fan (74) to start; the cooling fan (74) is opposite to the motor (1), a plurality of cooling grooves (75) are uniformly formed in the side wall of the protective cover (7) close to the motor (1) and the compression host machine (2), and sound-absorbing sponge blocks (751) are embedded in the cooling grooves (75); the first curtain (82) comprises a left sheet (822) and a right sheet (823), the left sheet (822) and the right sheet (823) are arranged on the storage roller (81) in parallel, and the fixing rope (821) is an elastic rope;
the opposite side walls of the left piece (822) and the right piece (823) are respectively provided with a plurality of pairs of fixed magnets (824), and the fixed magnets (824) are fixedly adhered to the surfaces of the left piece (822) and the right piece (823) through glue and are mutually combined with the fixed magnets (824) corresponding to each other; the fixed magnet (824) is an electromagnet, and the power supply of the fixed magnet (824) is controlled by a controller in the cooling fan (74).
2. A screw air compressor according to claim 1, wherein: the surfaces of the left sheet (822) and the right sheet (823) close to the outer sides are respectively provided with a first groove (825), and the end parts of the first grooves (825) point to the parts close to the motor (1) in the gap between the left sheet (822) and the right sheet (823).
CN202110572214.6A 2021-05-25 2021-05-25 Screw air compressor Active CN113294337B (en)

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