CN211950845U - Structure for preventing oil-free vortex air compressor from rotating disc - Google Patents

Abstract

The utility model relates to a structure for preventing the rotation of a moving plate of an oil-free scroll air compressor, which comprises an anti-rotation component, an eccentric component, a moving plate and a tray. The tray is away from the moving plate, and the anti-rotation component is provided with a fixing frame on the side away from the tray. The other end of the eccentric is rotatably connected to the fixing frame through a second bearing. A first installation hole is set on the tray. An installation gap is set between the outer side walls of the bearing, a groove is arranged in the inner wall of the first installation hole, an annular ring is embedded in the groove, and the annular ring closes to the first bearing side closely with the first bearing, through the first installation An installation gap is set between the inner wall of the hole and the outer side wall of the first bearing, a groove is arranged in the inner wall of the first installation hole, and an annular ring is embedded in the groove, so as to realize the loose installation of the first bearing and the first installation hole, and the assembly It is more convenient and avoids friction between metals and reduces noise.

Description

A structure for preventing the rotation of the moving plate of an oil-free scroll air compressor

technical field

The utility model relates to the field of scroll air compressors, in particular to an oil-free scroll air compressor anti-rotation plate structure.

Background technique

In the existing anti-rotation disk structure, the application number is "CN200920200198.2", and the patent title is "an oil-free scroll compressor" discloses a structure for preventing the rotation of the moving disk, including a frame, a moving disk, The fixed plate, the main shaft and the eccentric shaft, the moving plate and the fixed plate are installed in the frame, the moving plate and the fixed plate form a compression chamber, the main shaft drives the moving plate to move in a plane, and the three eccentric shafts play the limiting role of the moving plate.

However, the eccentric shaft is very inconvenient to install, and when installed through the bearing, the tight installation of the bearing often rubs against the tray during rotation and makes noise, which puts forward higher requirements for the installation position of the air compressor and cannot be installed. It should be placed in human settlements or working areas, so as not to cause the noise to affect people's normal life.

Therefore, there is a need for an oil-free scroll air compressor anti-rotation plate structure that is more convenient to assemble, avoids friction between metals, and reduces noise.

Utility model content

In view of the above situation, it is necessary to provide an oil-free scroll air compressor anti-rotation plate structure that is more convenient to assemble, avoids friction between metals, and reduces noise.

An oil-free scroll air compressor anti-rotation structure of a moving plate includes an anti-rotation component, an eccentric component, a moving plate and a tray, the moving plate is connected to one side of the tray, the anti-rotation component is arranged on the other side of the tray, and the eccentric component is used for Drive the tray to perform eccentric revolution and translation. The anti-rotation component is used to prevent the tray from rotating. The anti-rotation component includes an eccentric piece. One end of the eccentric piece is rotatably connected to the side of the tray away from the moving plate through the first bearing. The anti-rotation component is provided with a side away from the tray. A fixed frame, the other end of the eccentric piece is rotatably connected to the fixed frame through a second bearing, and the rotational eccentricity of the eccentric piece is equal to the rotational eccentricity of the tray.

The eccentric part includes a rotating shaft and an eccentric shaft. The eccentric shaft is arranged at the eccentric part of one end of the rotating shaft. A first installation hole is arranged on the tray corresponding to the eccentric shaft. The eccentric shaft is installed in the first installation hole through the first bearing. The rotating shaft is provided with a second mounting hole, and the rotating shaft is mounted in the second mounting hole through the second bearing.

An installation gap is set between the inner wall of the first installation hole and the outer wall of the first bearing, a groove is arranged in the inner wall of the first installation hole, an annular ring is embedded in the groove, and the annular ring is close to the side of the first bearing and the first bearing. Bearings fit snugly.

Preferably, there are several eccentric members, and the eccentric members are arranged on the side of the tray away from the moving plate.

Preferably, there are three eccentric members, and the eccentric members are circumferentially arrayed on the side of the tray away from the moving plate.

Preferably, the eccentric assembly includes a drive shaft and an eccentric pin, the drive shaft is arranged on the side of the tray away from the moving plate, the eccentric pin is arranged between the drive shaft and the tray, one end of the eccentric pin is connected to the end of the drive shaft close to the tray, and the tray faces the drive shaft. A third mounting hole is provided on the side corresponding to the eccentric pin, and the other end of the eccentric pin is mounted in the third mounting hole through a third bearing.

Preferably, the width of the installation gap is twenty wires.

Preferably, the groove is provided on the inner side wall of the first installation hole at a position one third from the bottom of the first installation hole.

Preferably, the first bearing, the second bearing and the third bearing are all angular contact ball bearings.

Preferably, a balance block is provided on one side of the drive shaft, and the balance block is used to balance the unbalanced inertial force caused by the rotation of the tray and the moving plate driven by the drive shaft.

The above-mentioned structure of the anti-rotation disk of the oil-free scroll air compressor is provided through the installation gap between the inner side wall of the first installation hole and the outer side wall of the first bearing, and a groove is arranged in the inner wall of the first installation hole. An annular ring is embedded in the groove, so that the loose installation of the first bearing and the first installation hole is realized, the assembly is more convenient, the friction between metals is avoided, and the noise is reduced.

Description of drawings

Fig. 1 is the structure diagram of the structure of the anti-rotation disk of the oil-free scroll air compressor of the present invention;

Fig. 2 is the explosion structure diagram of the structure of the anti-rotation disk of the oil-free scroll air compressor of the present invention;

3 is another structural diagram of the structure of the anti-rotation disk of the oil-free scroll air compressor of the present invention;

4 is another structural diagram of the structure of the anti-rotation disk of the oil-free scroll air compressor of the present invention;

FIG. 5 is a cross-sectional structural view taken along A-A of FIG. 4 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the structure of the anti-rotation disc of the oil-free scroll air compressor of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

1-2, the structure of the anti-rotation disk of the oil-free scroll air compressor of the present invention includes a moving disk 300, a static disk, an anti-rotation component, a tray 200 and an eccentric component, and the eccentric component includes a drive shaft 100 and an eccentric component. Pin 410, the static disk is arranged on one side of the moving disk 300, the static disk and the moving disk 300 are oppositely provided with an involute-shaped vortex line, the shape and size of the vortex lines of the static disk and the moving disk 300 are exactly the same, and the moving disk 300 and the static disk 300 are opposite to each other. The phase difference between the two disks is 180°, the tray 200 is disposed on the other side of the moving disk 300, the drive shaft 100 is disposed on the side of the tray 200 away from the moving disk 300, and the drive shaft 100 is connected to the tray 200 through the eccentric pin 410 and faces the drive shaft 100. On the other hand, the drive shaft 100 is used to drive the tray 200 to perform eccentric revolution and translation.

Specifically, the moving plate 300 can be integrally formed with the tray 200 , and of course, the moving plate 300 can also be fixedly connected to the tray 200 through fasteners.

The anti-rotation component is used to prevent the tray 200 from rotating. The anti-rotation component includes an eccentric member 610. One end of the eccentric member 610 is rotatably connected to the side of the tray 200 away from the moving plate 300 through the first bearing 620. The other end of the eccentric member 610 is rotatably connected to the fixed frame through the second bearing 640 .

The eccentric member 610 rotates eccentrically as the tray 200 revolves and translates, and the rotational eccentricity of the eccentric member 610 is equal to the rotational eccentricity of the tray 200 .

Specifically, the fixing frame is fixedly installed on the body.

Specifically, a balance weight 500 is provided on one side of the drive shaft 100 . The balance block 500 is used to balance the unbalanced inertial force caused by the rotation of the tray 200 and the moving plate 300 driven by the drive shaft 100 .

The eccentric parts used in this structure are processed parts, and there are no special requirements for the material, and the general 45-gauge steel can meet the requirements for use, and the processing is simple and the cost is low.

In actual use, the static disk is fixed on the body, the opening on the outer side of the vortex line is the air inlet 330, the center of the static disk is provided with an exhaust port, and the moving disk 300 is inserted in the static disk, so that the space between the moving disk 300 and the static disk is formed. Several crescent-shaped air cavities are formed. These air cavities are equivalent to the cylinder of the piston compressor. The crescent-shaped air cavity gradually becomes smaller from the periphery to the middle. During the compression process, the moving plate 300 performs revolution and translation in the static plate, so that the The crescent-shaped air cavity drives the gas to move to the center continuously. When the gas further enters from the air inlet 330, it is sealed by the vortex line to form a new crescent-shaped air cavity, so that the vortex air compressor can continuously move to the static disk. The gas is compressed in the middle, and several crescent-shaped gas cavities represent several states in the gas compression process.

When the moving disk 300 revolves and translates around the stationary disk, the eccentric member 610 simultaneously rotates eccentrically with the same amount of eccentricity. When the compressor is working, the moving disk 300 is subjected to the axial force, radial force and tangential force of the gas. , so that the force acting on the moving plate 300 has a self-rotating moment, so that the moving plate 300 has a tendency to rotate. At this time, the tangential force on the moving plate 300 will be balanced by the fixed frame connected to the eccentric member 610, so that the moving plate 300 has a tendency to rotate. Disk 300 doesn't spin.

Specifically, the fastener is a fastening structure such as a screw.

Referring to FIG. 2 , further, the eccentric member 610 includes a rotating shaft and an eccentric shaft, the eccentric shaft is arranged at an eccentric position at one end of the rotating shaft, a first mounting hole 630 is provided on the tray 200 corresponding to the eccentric shaft, and the eccentric shaft is installed through the first bearing 620 In the first installation hole 630 , a second installation hole is provided on the fixing frame corresponding to the rotating shaft, and the rotating shaft is installed in the second installation hole through the second bearing 640 .

Specifically, there are several eccentric members 610 , and the eccentric members 610 are disposed on the side of the tray 200 away from the moving plate 300 .

Referring to FIG. 1 , preferably, there are three eccentric members 610 , and the eccentric members 610 are circumferentially arrayed on the side of the tray 200 away from the moving plate 300 .

After conducting sufficient experiments on the stability of the moving plate 300 and the matching scheme of the number of eccentric members 610, it is concluded that when there are only three eccentric members 610, it is most likely to be suitable for a large number of applications, and when there are more than three eccentric members 610 , the cost will further increase, but the stability of the moving plate 300 cannot be improved correspondingly. When the number of eccentric members 610 is less than three, the cost is reduced, but the stability of the moving plate 300 is greatly reduced, and the eccentricity When there are only three parts 610, the three eccentric parts 610 are circumferentially arrayed on the tray 200 to just form three corners of a triangle, so that the moving discs 300 are supported in pairs at each point. The stability of the tray 200 at this time is higher.

2-5, specifically, the eccentric pin 410 is provided between the drive shaft 100 and the tray 200, one end of the eccentric pin 410 is connected to the end of the drive shaft 100 close to the tray 200, and the side of the tray 200 facing the drive shaft 100 is provided corresponding to the eccentric pin 410 In the third installation hole, the other end of the eccentric pin 410 is installed in the third installation hole through the third bearing 420 .

Of course, in the actual installation work, as long as the rotation eccentricity of the tray 200 can provide the eccentric revolution and translation of the moving disk 300 in the static disk, so that the combination between the moving disk 300 and the static disk can make the air compressor work normally. Yes, there are three main installation methods:

1) One end of the eccentric pin 410 is connected to the eccentric position of the drive shaft 100, and the other end of the eccentric pin 410 is connected to the center of the circle of the tray 200. At this time, the rotation eccentricity of the tray 200 can just make the air compressor work normally;

2) One end of the eccentric pin 410 is connected to the rotation center of the drive shaft 100, and the other end of the eccentric pin 410 is connected to the eccentric part of the tray 200. At this time, the rotation eccentricity of the tray 200 can just make the air compressor work normally;

3) One end of the eccentric pin 410 is connected to the eccentric part of the drive shaft 100, and the other end of the eccentric pin 410 is connected to the eccentric part of the tray 200. By combining the distance from the eccentric pin 410 to the rotation center of the drive shaft 100 and the distance from the eccentric pin 410 to the center of the tray 200, The rotation eccentricity of the tray 200 is just enough to make the air compressor operate normally.

Further, the first bearing 620 , the second bearing 640 and the third bearing 420 are all angular contact ball bearings.

Referring to FIG. 5 , further, an installation gap is set between the inner side wall of the first installation hole 630 and the outer side wall of the first bearing 620 , a groove 650 is arranged in the inner wall of the first installation hole 630 , and an annular groove is embedded in the groove 650 The annular ring is in close contact with the first bearing 620 on the side close to the first bearing 620 .

Preferably, the width of the installation gap is twenty wires.

Filament is a unit of length, where a filament is equal to 0.01 mm.

By setting an installation gap between the inner side wall of the first installation hole 630 and the outer side wall of the first bearing 620, loose installation is performed, which makes the installation process of the first bearing 620 more convenient. However, due to the loose installation, if the installation gap is too large If the installation gap is too small, the equipment will be stuck during operation, and higher machining accuracy is also required. After repeated testing and verification, the first installation hole 630 and the first installation hole 630 It is most suitable when the installation gap between the bearings 620 is 20 wires. This precision has almost no precision requirements for machining, which reduces the difficulty of machining. By arranging an annular ring in the groove 650, the annular ring is close to the side of the first bearing 620. It is in close contact with the first bearing 620 to make up the installation gap.

Referring to FIG. 5 , preferably, the groove 650 is provided on the inner side wall of the first installation hole 630 at a position one third from the bottom of the first installation hole 630 .

After repeated tests and verifications, it is the best choice to set the groove 650 on the inner side wall of the first mounting hole 630 corresponding to one third of the bottom of the first bearing 620. If the position is too low or too high, the bearing will be damaged. Oscillation does not play the role of buffering and damping and making up for the gap. By setting this way, the metal friction between the first bearing 620 and the first mounting hole 630 is reduced, and the air compressor will be more stable during operation, and the noise will be reduced. Compared with the traditional anti-rotation structure, the noise of the air compressor with the structure of the utility model is lower by five to eight decibels.

The new working principle of the present invention: during the installation process, since there is an installation gap between the first installation hole 630 and the first bearing 620, it is very convenient to install the first bearing 620, and the first bearing 620 and the first bearing 620 are very convenient. An annular ring embedded in the groove 650 is disposed between the first installation holes 630 , which prevents the first bearing 620 from rotating during use and thus rubbing against the inner wall of the first installation hole 630 , resulting in greater noise.

After a lot of experiments, the optimal installation gap is 20 wires, and the groove 650 is optimally arranged on the inner side wall of the first installation hole 630 corresponding to one third of the bottom of the first bearing 620 .

During use, the drive shaft 100 rotates under the driving of the power source and drives the tray 200 and the moving plate 300 to revolve and translate with a certain eccentricity through the eccentric pin 410, and the gas continuously enters from the opening outside the vortex line. The air inlet 330, due to the periodic revolution and translation of the moving plate 300, enables the crescent-shaped cavity to continuously receive the newly entered gas, and pushes to move toward the center of the static plate under the revolution and translation of the moving plate 300, In the process of moving, the volume of the crescent-shaped air cavity is continuously reduced, so that the gas is continuously compressed. During the process of gas compression, the air pressure on the air cavity wall between adjacent crescent-shaped air cavities forms a certain air pressure. Therefore, the tangential force on the moving plate 300 is formed, so that the moving plate 300 has a tendency to rotate. The eccentric piece is installed on the fixed frame, so when the moving plate 300 drives the tray 200 to rotate, it will be stuck by the eccentric piece and cannot rotate, which ensures the accurate eccentric revolution and translation of the moving plate 300 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to equivalent examples of equivalent changes by using the technical content disclosed above, provided that the technical content of the present invention is not departed from The content of the solution, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides a structure of dish rotation is prevented moving by oil-free vortex air compressor machine which characterized in that: the anti-rotation tray comprises an anti-rotation assembly, an eccentric assembly, a movable tray (300) and a tray (200), wherein the movable tray (300) is connected with one side of the tray (200), the anti-rotation assembly is arranged on the other side of the tray (200), the eccentric assembly is used for driving the tray (200) to perform eccentric revolution translation, the anti-rotation assembly is used for preventing the tray (200) from rotating, the anti-rotation assembly comprises an eccentric part (610), one end of the eccentric part (610) is rotatably connected with one side, away from the movable tray (300), of the tray (200) through a first bearing (620), a fixing frame is arranged on one side, away from the tray (200), of the anti-rotation assembly, the other end of the eccentric part (610) is rotatably connected with the fixing frame through a second bearing (640), and the rotating eccentricity of the eccentric part (610) is equal to the rotating eccentricity of the tray (200);

the eccentric part (610) comprises a rotating shaft and an eccentric shaft, the eccentric shaft is arranged at one end of the rotating shaft in an eccentric position, a first mounting hole (630) is formed in the tray (200) corresponding to the eccentric shaft, the eccentric shaft is mounted in the first mounting hole (630) through a first bearing (620), a second mounting hole is formed in the fixed frame corresponding to the rotating shaft, and the rotating shaft is mounted in the second mounting hole through a second bearing (640);

be provided with the installation clearance between first mounting hole (630) inside wall and first bearing (620) lateral wall, set up recess (650) in first mounting hole (630) inner wall zhonghuan, it is equipped with the annular ring to inlay in recess (650), the annular ring is close to first bearing (620) one side and is closely laminated with first bearing (620).

2. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 1, wherein: the number of the eccentric parts (610) is several, and the eccentric parts (610) are arranged on one side of the tray (200) departing from the movable disc (300).

3. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 2, wherein: the number of the eccentric parts (610) is three, and the eccentric parts (610) are circumferentially arrayed on one side of the tray (200) which is far away from the movable plate (300).

4. The structure for preventing the spinning of the disk of an oil-free scroll air compressor as claimed in claim 3, wherein: eccentric subassembly includes drive shaft (100) and eccentric round pin (410), drive shaft (100) set up in tray (200) deviates from one side of driving disk (300), the eccentric round pin set up in the drive shaft with between the tray, eccentric round pin (410) one end is connected drive shaft (100) are close to tray (200) one end, tray (200) face drive shaft (100) one side corresponds eccentric round pin (410) sets up the third mounting hole, the eccentric round pin (410) other end pass through third bearing (420) install in the third mounting hole.

5. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 1, wherein: the width of the mounting gap is twenty filaments.

6. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 5, wherein: the groove (650) is provided on an inner side wall of the first mounting hole (630) at a position spaced apart from a bottom one-third of the first mounting hole (630).

7. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 4, wherein: the first bearing (620), the second bearing (640) and the third bearing (420) are all angular contact ball bearings.

8. The structure for preventing the spinning of the disk of the oil-free scroll air compressor as claimed in claim 4, wherein: a balance weight (500) is arranged on one side of the driving shaft (100), and the balance weight (500) is used for balancing unbalanced inertial force caused by the rotation of the tray (200) and the movable disc (300) driven by the driving shaft (100).

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