CN219366314U

CN219366314U - Vortex vacuum pump

Info

Publication number: CN219366314U
Application number: CN202222991907.1U
Authority: CN
Inventors: 沈叶凯; 张炯焱; 江炳辉
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-07-18
Anticipated expiration: 2032-11-08

Abstract

The utility model provides a vortex vacuum pump, includes the pump body and is used for driving the moving drive arrangement of pump body, its characterized in that: the pump body sets up the below at drive arrangement, the pump body includes the pump chamber and sets up the quiet vortex dish of intermeshing in the pump chamber and move the vortex dish, the bottom in pump chamber sets up an gas vent and a plurality of installation hole sites, drive arrangement includes the motor chamber and sets up the motor assembly in the motor chamber, the motor assembly is including setting firmly in the stator of motor chamber, setting up the rotor in the stator and setting up the drive shaft in the rotor, the drive shaft links to each other with moving the vortex dish, the both ends of drive shaft still are equipped with first balancing piece and second balancing piece respectively for the vibration of balanced whole machine. The vortex vacuum pump is not easy to store water vapor, dust and other impurities.

Description

Vortex vacuum pump

Technical Field

The utility model relates to the technical field of vacuum pumps, in particular to a vortex vacuum pump.

Background

The vortex vacuum pump generally comprises a pump body and a driving device for driving the pump body to operate, wherein the pump body comprises a pump cavity, a pair of intermeshing fixed vortex plates and movable vortex plates, the fixed vortex plates and the movable vortex plates are arranged in the pump cavity, the driving device operates to drive a crankshaft to rotate, the crankshaft rotates to drive the movable vortex plates to rotate, and further the rotation preventing structure ensures that the movable vortex plates move horizontally relative to the fixed vortex plates, so that the air suction, compression and exhaust processes of the vortex vacuum pump are finally realized.

Because the driving device is generally heavier than the pump body, the conventional vortex vacuum pump is placed on the horizontal plane in a downward vertical mode or placed on the horizontal plane in a horizontal mode when the driving device is in normal operation. Fig. 1 illustrates a scroll vacuum pump placed in a vertical mode, which comprises a driving device 1a and a pump body 2a arranged above the driving device 1a, wherein the pump body 2a comprises a pump cavity 3a, an exhaust port 4a is arranged at the top of the pump cavity 3a, the driving device 1a comprises a motor cavity 5a, a mounting hole site 6a is arranged at the bottom of the motor cavity 5a, three using modes of the mounting hole site 6a are adopted, one mode is used for mounting a shock pad 7a and then directly placed on a horizontal plane, the other mode is used for being mounted with a sheet metal part and then placed on the horizontal plane together, and the third mode is used for mounting the shock pad 7a and mounting the shock pad 7a on the sheet metal part and finally placed on the horizontal plane together.

However, the conventional scroll vacuum pump has the following technical problems: because the exhaust port 4a is located at the top of the pump cavity 3a, impurities such as water vapor in the pump cavity, dust generated when the sealing strip embedded on the dynamic vortex disk runs, and the like are sucked, and are difficult to discharge through the exhaust port 4a due to the action of gravity, so that the water vapor, the dust and other impurities are accumulated in the pump cavity.

Disclosure of Invention

The utility model aims to solve the technical problems that: provided is a scroll vacuum pump which is less likely to accumulate moisture, dust and other impurities therein.

The technical scheme of the utility model is as follows: the utility model provides a vortex vacuum pump, includes the pump body and is used for driving the moving drive arrangement of pump body, its characterized in that: the pump body sets up the below at drive arrangement, the pump body includes the pump chamber and sets up the quiet vortex dish of intermeshing in the pump chamber and move the vortex dish, the bottom in pump chamber sets up an gas vent and a plurality of installation hole sites, drive arrangement includes the motor chamber and sets up the motor assembly in the motor chamber, the motor assembly is including setting firmly in the stator of motor chamber, setting up the rotor in the stator and setting up the drive shaft in the rotor, the drive shaft links to each other with moving the vortex dish, the both ends of drive shaft still are equipped with first balancing piece and second balancing piece respectively for the vibration of balanced whole machine.

After the structure is adopted, the utility model has the following advantages:

the vortex vacuum pump changes the traditional vertical mode that the pump body is arranged above the driving device, and changes the upper and lower positions of the pump body and the driving device into an inverted mode that the pump body is arranged below the driving device, in this mode, the installation hole site is also arranged at the bottom of the pump body, and the exhaust port is also arranged at the bottom of the pump body, so that when the machine runs, if water vapor, dust and other impurities enter the machine, the water vapor, dust and other impurities naturally fall down and are smoothly discharged through the exhaust port below due to the action of gravity; in addition, in order to ensure that the machine placed in an inverted mode can still stably run, a dynamic balance structure is additionally arranged, namely, the vibration of the whole machine is balanced by arranging a first balance block and a second balance block on a driving shaft; therefore, the utility model greatly reduces the accumulation of water vapor, dust and other impurities in the machine on the basis of ensuring the stable operation of the machine.

Preferably, the plurality of mounting holes are circumferentially distributed on the outer side wall of the bottom of the pump cavity, the exhaust port is arranged at the center of the bottom of the pump cavity, and the pump further comprises an exhaust pipeline which is radially communicated with the exhaust port and the outer side wall of the pump cavity and is used for leading out the gas of the exhaust port to the side surface of the pump cavity for discharging. The arrangement is reasonable, the exhaust pipeline is utilized to exhaust the gas of the exhaust port from the side face of the pump cavity, the exhaust is smoother, and in addition, the plurality of mounting hole sites are circumferentially distributed at the bottom of the pump cavity, so that the whole machine is stable after the mounting hole sites are mounted.

Preferably, a bearing seat is further arranged between the motor cavity and the pump cavity, a first bearing assembly for supporting the driving shaft is arranged on the bearing seat, a first O-shaped sealing ring is arranged at the joint of the bearing seat and the motor cavity, a second O-shaped sealing ring is arranged at the joint of the bearing seat and the pump cavity, a one-way valve is arranged on the exhaust port, and a third O-shaped sealing ring is arranged between the one-way valve and the exhaust port. Compared with the prior art which adopts a dynamic sealing mode of arranging a framework seal on a driving shaft, the device can effectively avoid dust generated by friction with the framework seal when the driving shaft rotates; the sealing mode of the O-shaped sealing ring is adopted to isolate the atmosphere from entering the motor cavity and the exhaust port of the pump cavity, and compared with the glue filling mode, the heat dissipation effect is better, so that the sealing mode of the O-shaped sealing ring is adopted to isolate the atmosphere from entering the motor cavity and the pump cavity, the dust and other internal storage can be further reduced, and the heat dissipation effect of the whole machine is better.

Preferably, a bearing end cover is further arranged on one side, far away from the pump cavity, of the motor cavity, a second bearing assembly which is arranged on the inner side of the bearing end cover and used for supporting the driving shaft is further arranged in the motor cavity, and a fourth O-shaped sealing ring is arranged between the bearing end cover and the motor cavity. The sealing mode of the O-shaped sealing ring is adopted in the arrangement, the atmosphere is isolated from entering the motor cavity, and compared with the mode of glue filling, the motor cavity is completely sealed, and the heat dissipation effect is better.

Preferably, the first bearing assembly comprises a first bearing and a second bearing arranged side by side on the drive shaft, the second bearing assembly comprises a third bearing arranged on the drive shaft, the first counterweight is arranged between the third bearing and the rotor, the right side of the first counterweight is at least partially positioned in the stator, and the second counterweight is arranged between the first bearing and the second bearing. This setting installs the vacant position in the motor chamber with first balancing piece to install the second balancing piece in the bearing frame, the structure is simpler compact.

Description of the drawings:

FIG. 1 is a schematic diagram of a conventional scroll vacuum pump;

FIG. 2 is a schematic view of a scroll vacuum pump according to the present utility model;

FIG. 3 is a front view of a scroll vacuum pump of the present utility model;

FIG. 4 is a cross-sectional view taken at AA' of FIG. 3;

in the prior art diagram: 1 a-driving device, 2 a-pump body, 3 a-pump cavity, 4 a-exhaust port, 5 a-motor cavity, 6 a-mounting hole site and 7 a-shock pad;

in the drawings of the utility model: 1-pump body, 2-drive arrangement, 3-pump chamber, 4-quiet vortex dish, 5-moves vortex dish, 6-gas vent, 7-installation hole site, 8-motor chamber, 9-stator, 10-rotor, 11-drive shaft, 12-first balancing piece, 13-second balancing piece, 14-bearing frame, 15-first O shape sealing washer, 16-second O shape sealing washer, 17-third O shape sealing washer, 18-fourth O shape sealing washer, 19-check valve, 20-bearing end cover, 21-first bearing, 22-second bearing, 23-third bearing, 24-air inlet, 25-exhaust duct.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, in conjunction with examples.

Examples:

as shown in fig. 2-4, a scroll vacuum pump comprises a pump body 1 and a driving device 2 for driving the pump body 1 to operate, wherein the pump body 1 is arranged below the driving device 2, the pump body 1 comprises a pump cavity 3, a fixed scroll 4 and a movable scroll 5 which are mutually meshed and arranged in the pump cavity 3, an exhaust port 6 and a plurality of mounting holes 7 are arranged at the bottom of the pump cavity 3, the driving device 2 comprises a motor cavity 8 and a motor assembly arranged in the motor cavity 8, the motor assembly comprises a stator 9 fixedly arranged in the motor cavity 8, a rotor 10 arranged in the stator 9 and a driving shaft 11 arranged in the rotor 10, the driving shaft 11 is connected with the movable scroll 5, and a first balance block 12 and a second balance block 13 are respectively arranged at two ends of the driving shaft 11 and used for balancing vibration of the whole machine; an air inlet 24 is also arranged on the pump cavity 3; the mounting hole site 7 is used in three modes, one is used for directly placing the shock pad on the horizontal plane after being mounted, the other is used for placing the shock pad on the horizontal plane together with the sheet metal part after being mounted, and the third is used for mounting the shock pad, mounting the shock pad on the sheet metal part and finally placing the shock pad on the horizontal plane together.

The vortex vacuum pump changes the traditional vertical mode that the pump body 1 is arranged above the driving device 2, and changes the upper and lower positions of the pump body 1 and the driving device 2 into an inverted mode that the pump body 1 is arranged below the driving device 2, in this mode, the installation hole site 7 is also arranged at the bottom of the pump body 1, and the exhaust port 6 is also arranged at the bottom of the pump body 1, so that if moisture, dust and other impurities enter the interior during the operation of the machine, the water drops naturally due to the action of gravity and is smoothly discharged through the exhaust port 6 below; in addition, in order to ensure that the machine placed upside down can still stably run, a dynamic balance structure is added, namely, the vibration of the whole machine is balanced by arranging a first balance block 12 and a second balance block 13 on a driving shaft 11; therefore, the utility model greatly reduces the accumulation of water vapor, dust and other impurities in the machine on the basis of ensuring the stable operation of the machine.

Preferably, the plurality of mounting holes 7 and Xiang Bushe are formed in the outer side wall of the bottom of the pump cavity 3, the exhaust port 6 is arranged in the center of the bottom of the pump cavity 3, and the pump further comprises an exhaust pipeline 25 which radially communicates the exhaust port 6 with the outer side wall of the pump cavity 3 and is used for leading out the gas of the exhaust port 6 to the side surface of the pump cavity 3 for exhausting. This setting overall arrangement is reasonable, and utilizes exhaust duct 25 to follow the side discharge of pump chamber 3 with the gas of gas vent 6, and the exhaust is more smooth and easy, and a plurality of mounting hole site 7 week Xiang Bushe are in the bottom of pump chamber 3 in addition, can make the complete machine comparatively firm after the installation of mounting hole site 7.

Preferably, a bearing seat 14 is further arranged between the motor cavity 8 and the pump cavity 3, a first bearing assembly for supporting the driving shaft 11 is arranged on the bearing seat 14, a first O-shaped sealing ring 15 is arranged at the joint of the bearing seat 14 and the motor cavity 8, a second O-shaped sealing ring 16 is arranged at the joint of the bearing seat 14 and the pump cavity 3, a check valve 19 is arranged on the exhaust port 6, and a third O-shaped sealing ring 17 is arranged between the check valve 19 and the exhaust port 6. Compared with the prior art that a dynamic sealing mode of arranging a framework seal on the driving shaft 11 is adopted, the static sealing mode of an O-shaped sealing ring is adopted to isolate the air from entering the pump cavity 3, and dust generated by friction with the framework seal when the driving shaft 11 rotates can be effectively avoided; the sealing mode of the O-shaped sealing ring is adopted to isolate the atmosphere from entering the motor cavity 8 and the exhaust port 6 of the pump cavity 3, and compared with the glue filling mode, the heat dissipation effect is better, so that the sealing mode of the O-shaped sealing ring is adopted to isolate the atmosphere from entering the motor cavity and the pump cavity, the dust and other internal storage can be further reduced, and the heat dissipation effect of the whole machine is better.

Preferably, a bearing end cover 20 is further arranged on one side, away from the pump cavity 3, of the motor cavity 8, a second bearing assembly which is arranged on the inner side of the bearing end cover 20 and is used for supporting the driving shaft 11 is further arranged in the motor cavity 8, and a fourth O-shaped sealing ring 18 is arranged between the bearing end cover 20 and the motor cavity 8. This setting adopts the sealing means of O shape sealing washer, and isolated atmosphere gets into motor chamber 8, compares and adopts the mode of encapsulating totally closed motor chamber 8, and the radiating effect is better.

Preferably, the first bearing assembly comprises a first bearing 21 and a second bearing 22 arranged side by side on the drive shaft 11, the second bearing assembly comprises a third bearing 23 arranged on the drive shaft 11, the first counterweight 12 is arranged between the third bearing 23 and the rotor 10, and the right side of the first counterweight 12 is at least partially located within the stator 9, and the second counterweight 13 is arranged between the first bearing 21 and the second bearing 22. This arrangement allows the first counterweight 12 to be mounted in the free position of the motor cavity 8 and the second counterweight 13 to be mounted in the bearing housing 14, with a simpler and more compact construction.

Claims

1. The utility model provides a vortex vacuum pump, includes pump body (1) and is used for driving the drive arrangement (2) of pump body (1) operation, its characterized in that: the pump body (1) is arranged below the driving device (2), the pump body (1) comprises a pump cavity (3) and a fixed vortex disc (4) and a movable vortex disc (5) which are meshed with each other and arranged in the pump cavity (3), an exhaust port (6) and a plurality of mounting holes (7) are formed in the bottom of the pump cavity (3), the driving device (2) comprises a motor cavity (8) and a motor assembly arranged in the motor cavity (8), the motor assembly comprises a stator (9) fixedly arranged in the motor cavity (8), a rotor (10) arranged in the stator (9) and a driving shaft (11) arranged in the rotor (10), the driving shaft (11) is connected with the movable vortex disc (5), and a first balance block (12) and a second balance block (13) are further arranged at two ends of the driving shaft (11) respectively and used for balancing vibration of the whole machine.

2. A scroll vacuum pump as claimed in claim 1, wherein: the installation hole sites (7) are circumferentially distributed on the outer side wall of the bottom of the pump cavity (3), the exhaust port (6) is arranged at the center of the bottom of the pump cavity (3), and the installation hole site also comprises an exhaust pipeline (25) which is radially communicated with the exhaust port (6) and the outer side wall of the pump cavity (3) and is used for leading out gas of the exhaust port (6) to the side surface of the pump cavity (3) for discharging.

3. A scroll vacuum pump as claimed in claim 1, wherein: still be equipped with bearing frame (14) between motor chamber (8) and pump chamber (3), be equipped with the first bearing assembly that is used for supporting drive shaft (11) on bearing frame (14), the butt joint department of bearing frame (14) and motor chamber (8) sets up first O shape sealing washer (15), the butt joint department of bearing frame (14) and pump chamber (3) sets up second O shape sealing washer (16), be equipped with check valve (19) on gas vent (6), set up third O shape sealing washer (17) between check valve (19) and gas vent (6).

4. A scroll vacuum pump as claimed in claim 3, wherein: one side of the motor cavity (8) far away from the pump cavity (3) is further provided with a bearing end cover (20), a second bearing assembly which is arranged on the inner side of the bearing end cover (20) and used for supporting the driving shaft (11) is further arranged in the motor cavity (8), and a fourth O-shaped sealing ring (18) is arranged between the bearing end cover (20) and the motor cavity (8).

5. A scroll vacuum pump as claimed in claim 4, wherein: the first bearing assembly comprises a first bearing (21) and a second bearing (22) which are arranged on the driving shaft (11) side by side, the second bearing assembly comprises a third bearing (23) arranged on the driving shaft (11), the first balance block (12) is arranged between the third bearing (23) and the rotor (10), the right side of the first balance block (12) is at least partially positioned in the stator (9), and the second balance block (13) is arranged between the first bearing (21) and the second bearing (22).