CN214533525U - Screw vacuum pump with large air extraction rate - Google Patents
Screw vacuum pump with large air extraction rate Download PDFInfo
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- CN214533525U CN214533525U CN202022560715.6U CN202022560715U CN214533525U CN 214533525 U CN214533525 U CN 214533525U CN 202022560715 U CN202022560715 U CN 202022560715U CN 214533525 U CN214533525 U CN 214533525U
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Abstract
The utility model relates to a screw vacuum pump with large air extraction amount, which comprises a pump body (101), a motor (102) arranged at the right end of the pump body (101), and a pair of screws (103) which are rotatably arranged inside the pump body (101) through bearings at two ends and are in transmission connection with the motor (102), wherein a dust blocking sealing structure (104) is arranged at the position on the shaft of the screw (103) close to a bearing at the end part; the dust-blocking sealing structure (104) comprises a labyrinth sealing device (201), a dust-blocking ring (202), a dust-collecting cavity (203) and an oil sealing device (204) which are sequentially arranged from left to right. The utility model relates to a big air exhaust volume screw vacuum pump, simple structure, dust seal are effectual, have prolonged screw vacuum pump maintenance cycle under big air exhaust volume environment greatly and have reduced fault rate, reduce cost.
Description
Technical Field
The utility model relates to a big air exhaust volume screw vacuum pump belongs to vacuum apparatus technical field.
Background
In the application occasions with large vacuum air extraction amount and high vacuum degree requirement, a plurality of screw vacuum pumps are often required to work in a coordination mode of parallel connection or series connection, because the air extraction amount is large, the amount of micro-dust particles in the screw vacuum pump bodies is more than that in the common vacuum environment, the lubricating oil in a screw bearing is easy to volatilize because the traditional screw vacuum pump adopts common mechanical seal or nitrogen seal, and the dust easily enters the bearing through a sealing device, so that the mechanical failure is caused and the machine is shut down, the failure rate is high, and the maintenance is frequent.
Disclosure of Invention
An object of the utility model is to overcome the aforesaid not enough, provide a dustproof sealing is effectual, the fault rate is low, maintenance cycle is long, with low costs big air extraction capacity screw vacuum pump.
The purpose of the utility model is realized like this:
a screw vacuum pump with large pumping capacity comprises a pump body, a motor arranged at the right end of the pump body, and a pair of screws which are rotatably arranged in the pump body through bearings at two ends and are in transmission connection with the motor; a dust blocking sealing structure is arranged on the screw shaft close to the end bearing; the dust blocking sealing structure comprises a labyrinth sealing device, a dust blocking ring, a dust collecting cavity and an oil sealing device which are sequentially arranged from left to right; the labyrinth sealing device comprises a sealing sleeve arranged on the screw shaft and a sealing ring arranged on the pump body and corresponding to the sealing sleeve; a plurality of annular grooves are formed in the outer circumference of the sealing sleeve, and a plurality of annular protrusions are formed in the inner circumference of the sealing ring; the number and the positions of the annular groove and the annular bulge correspond to each other, the annular bulge is embedded in the annular groove in a sliding manner, and the annular bulge is made of elastic wear-resistant material; the excircle diameter of the dust blocking ring is larger than that of the sealing ring; the dust collection cavity is an annular cavity arranged between the dust blocking ring and the oil seal device, the upper layer of the dust collection cavity is communicated with a dust removal port arranged on the top surface of the pump body through a pipeline, and the lower layer of the dust collection cavity is communicated with a dust discharge port arranged on the bottom surface of the pump body through a pipeline.
When the screw vacuum pump works, dust particles in the pump body of the screw vacuum pump are blocked by the labyrinth sealing device and then are thrown into the dust collection cavity by the dust blocking ring in a rotating mode for collection, so that the dust is prevented from entering the oil sealing device, and further the bearing operation is threatened; when the equipment is maintained, nitrogen is introduced from the dust removal port to discharge the dust in the dust collection cavity out of the pump body from the dust discharge port, or a dust suction device is connected to the dust discharge port to suck the dust in the dust collection cavity out of the pump body.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set up dust ring and dust collecting chamber between labyrinth seal and oil blanket, effectively prevent that the dust from getting into the screw rod bearing in a large number, prevent the too fast loss of bearing lubricating oil, simple structure, dust seal are effectual, have prolonged the maintenance cycle of screw rod vacuum pump under the big air exhaust volume environment greatly, have reduced the fault rate.
Drawings
Fig. 1 is a schematic structural view of the screw vacuum pump with large pumping capacity of the present invention.
Fig. 2 is the utility model relates to a big air extraction volume screw vacuum pump's dust blocking seal structure schematic diagram.
Fig. 3 is a schematic view of the dust collection chamber structure of the screw vacuum pump with large air extraction rate of the present invention.
Fig. 4 is the utility model relates to a big air extraction volume screw vacuum pump's local enlarged schematic diagram of dust blocking seal structure.
Wherein:
the device comprises a pump body 101, a motor 102, a screw 103 and a dust blocking sealing structure 104;
Detailed Description
Referring to fig. 1 to 3, the screw vacuum pump with large air extraction amount according to the present invention comprises a pump body 101, a motor 102 installed at the right end of the pump body 101, and a pair of screws 103 rotatably installed inside the pump body 101 through bearings at both ends and in transmission connection with the motor 102; a dust-blocking sealing structure 104 is arranged on the shaft of the screw 103 near the end bearing; the dust-blocking sealing structure 104 comprises a labyrinth sealing device 201, a dust-blocking ring 202, a dust-collecting cavity 203 and an oil sealing device 204 which are arranged from left to right in sequence; the labyrinth seal device 201 comprises a gland 205 mounted on the shaft of the screw 103 and a seal ring 206 arranged on the pump body 101 at a position corresponding to the gland 205; a plurality of annular grooves 207 are formed on the outer circumference of the sealing sleeve 205, and a plurality of annular protrusions 208 are formed on the inner circumference of the sealing ring 206; the number and the positions of the annular groove 207 and the annular protrusion 208 are corresponding, the annular protrusion 208 is embedded in the annular groove 207 in a sliding manner, and the annular protrusion 208 is made of elastic wear-resistant material; the outer circle diameter of the dust blocking ring 202 is larger than that of the sealing ring 206; the dust collection cavity 203 is an annular cavity arranged between the dust ring 202 and the oil seal device 204, the upper layer of the dust collection cavity 203 is communicated with a dust removal port 209 arranged on the top surface of the pump body 101 through a pipeline, and the lower layer of the dust collection cavity 203 is communicated with a dust discharge port 210 arranged on the bottom surface of the pump body 101 through a pipeline.
When the screw vacuum pump works, dust particles in the pump body 101 of the screw vacuum pump are blocked by the labyrinth seal device 201 and then are thrown into the dust collection cavity 203 by the dust blocking ring 202 in a rotating mode for collection, so that the dust particles are prevented from entering the oil seal device 204, and further the bearing operation is threatened; during maintenance of the equipment, nitrogen is introduced from the dust removal port 209 to discharge dust in the dust collection chamber 203 out of the pump body 101 through the dust discharge port 210, or a dust suction device is connected to the dust discharge port 210 to suck dust in the dust collection chamber 203 out of the pump body 101.
In addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (3)
1. The utility model provides a big extraction rate screw vacuum pump, screw vacuum pump contains the pump body (101), installs motor (102) at the pump body (101) right-hand member, rotates through both ends bearing and installs a pair of screw rod (103) inside the pump body (101) and be connected with motor (102) transmission, its characterized in that: a dust-blocking sealing structure (104) is arranged on the shaft of the screw (103) and close to the end bearing; the dust-blocking sealing structure (104) comprises a labyrinth sealing device (201), a dust-blocking ring (202), a dust-collecting cavity (203) and an oil sealing device (204) which are arranged from left to right in sequence; the labyrinth seal device (201) comprises a seal sleeve (205) arranged on the shaft of the screw rod (103) and a seal ring (206) arranged on the pump body (101) and corresponding to the seal sleeve (205); a plurality of annular grooves (207) are formed in the outer circumference of the sealing sleeve (205), and a plurality of annular protrusions (208) are formed in the inner circumference of the sealing ring (206); the number of the annular grooves (207) is consistent with that of the annular protrusions (208), the positions of the annular grooves (207) are corresponding to that of the annular protrusions (208), and the annular protrusions (208) are embedded in the annular grooves (207) in a sliding mode; the dust collection cavity (203) is an annular cavity arranged between the dust blocking ring (202) and the oil seal device (204), the upper layer of the dust collection cavity (203) is communicated with a dust removal port (209) arranged on the top surface of the pump body (101) through a pipeline, and the lower layer of the dust collection cavity (203) is communicated with a dust removal port (210) arranged on the bottom surface of the pump body (101) through a pipeline.
2. The high-suction-rate screw vacuum pump according to claim 1, characterized in that: the annular bulge (208) is made of elastic wear-resistant material.
3. The high-suction-rate screw vacuum pump according to claim 1, characterized in that: the outer circle diameter of the dust blocking ring (202) is larger than that of the sealing ring (206).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560715.6U CN214533525U (en) | 2020-11-09 | 2020-11-09 | Screw vacuum pump with large air extraction rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560715.6U CN214533525U (en) | 2020-11-09 | 2020-11-09 | Screw vacuum pump with large air extraction rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214533525U true CN214533525U (en) | 2021-10-29 |
Family
ID=78287711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022560715.6U Active CN214533525U (en) | 2020-11-09 | 2020-11-09 | Screw vacuum pump with large air extraction rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214533525U (en) |
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2020
- 2020-11-09 CN CN202022560715.6U patent/CN214533525U/en active Active
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