CN214944973U

CN214944973U - Double-seal screw vacuum pump with independent cavity

Info

Publication number: CN214944973U
Application number: CN202120680642.6U
Authority: CN
Inventors: 张娜; 王智鑫; 杨茂峰
Original assignee: Yantai Volm Vacuum Technology Co ltd
Current assignee: Yantai Volm Vacuum Technology Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-30
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses an independent cavity dual-seal screw vacuum pump, including the pump body, motor, screw rod main part and transmission sealing rod, the side surface mounting of the pump body has the motor, and the inside symmetry of the pump body is provided with 2 screw rod main parts, the one end that the screw rod main part is close to the motor is connected with the transmission sealing rod. This independent cavity dual-seal screw vacuum pump, be provided with first sealing washer, along with the increase of pressure in the pump body, pressure in the pressure chamber also increases thereupon, first sealing washer pastes tightly with the inner wall of screw rod main part and pump body connecting portion under the effect of the pressure that increases gradually in the pressure chamber this moment, even first sealing washer is worn and torn gradually, first sealing washer also can remain the state of laminating with the inner wall of screw rod main part and pump body connecting portion under the effect of the pressure that increases gradually in the pressure chamber all the time, the sealed effect of first sealing washer to the pump body and screw rod main part connecting portion after having guaranteed long-time the use.

Description

Double-seal screw vacuum pump with independent cavity

Technical Field

The utility model relates to a screw rod main part vacuum pump technical field specifically is an independent cavity dual seal screw vacuum pump.

Background

The screw vacuum pump is an air extraction device which utilizes a pair of screws to synchronously rotate in a high speed and reverse direction in a pump shell to generate air suction and exhaust functions, is a renewal product of an oil seal type vacuum pump, can extract gas occasions containing a large amount of water vapor and a small amount of dust, and is widely applied to the fields of enterprises with higher requirements on clean vacuum, such as domestic pharmacy, chemical industry, semiconductors and the like;

however, the screw vacuum pump is worn due to the rotation of the screw after being used for a long time, and along with the increase of the internal pressure of the vacuum pump, high-pressure gas and medium in the vacuum pump can enter the gear box to pollute lubricating oil in the gear box, so that the service life of the screw vacuum pump is not prolonged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an independent cavity dual-seal screw vacuum pump to solve the relatively poor problem of leakproofness after the long-time use of the screw vacuum pump that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an independent cavity double containment screw vacuum pump, includes the pump body, motor, screw rod main part, transmission sealing rod, the motor is installed to the side surface of the pump body, and the inside symmetry of the pump body is provided with 2 screw rod main parts, the one end that the screw rod main part is close to the motor is connected with the transmission sealing rod.

Preferably, the one end upper surface that the pump body is close to the motor is provided with the inlet pipe, the one end lower surface that the motor was kept away from to the pump body is provided with the discharging pipe, the inside sealing wheel that is provided with of one end that the pump body is close to the motor.

Preferably, the surface that the one end that the motor is close to the pump body runs through the pump body is connected with initiative ratch, the surface of initiative ratch is connected with driven ratch, and the surface that the one end that driven ratch is close to the motor runs through the pump body is connected with the heat dissipation fan.

Preferably, the two ends of the transmission sealing rod on one side of the motor are respectively clamped with the driving toothed rod and the screw rod main body, and the two ends of the transmission sealing rod on one side of the heat dissipation fan are respectively clamped with the driven toothed rod and the screw rod main body.

Preferably, the screw main bodies are symmetrically distributed on two sides of the center line of the pump body, and the thread directions of the screw main bodies are opposite.

Preferably, an air inlet is formed in the outer surface of one end, close to the motor, of the screw body, a pressure chamber is arranged inside one end, provided with the air inlet, of the screw body, a first sealing ring is installed on the outer surface of one end, close to the motor, of the screw body in an embedded mode, and an air outlet is formed in the outer surface of the screw body between the first sealing ring and the pressure chamber.

Preferably, the driving toothed bar is meshed with the driven toothed bar, one ends of the driving toothed bar and the driven toothed bar are in sliding connection with the transmission sealing bar, and an annular second sealing ring is arranged between the transmission sealing bar and the sealing wheel.

Compared with the prior art, the beneficial effects of the utility model are that: this independent cavity double containment screw vacuum pump:

1. the first sealing ring is arranged, the pressure in the pressure chamber is increased along with the increase of the pressure in the pump body, at the moment, the first sealing ring is more tightly attached to the inner walls of the screw rod main body and the pump body connecting part under the action of the gradually increased pressure in the pressure chamber, even if the first sealing ring is gradually abraded, the first sealing ring can always keep a state of being attached to the inner walls of the screw rod main body and the pump body connecting part under the action of the gradually increased pressure in the pressure chamber, and the sealing effect of the first sealing ring on the connecting part of the pump body and the screw rod main body after long-time use is ensured;

2. the transmission sealing rod is arranged, when the first sealing ring fails, pressure is applied between the transmission sealing rod and the screw rod main body, the transmission sealing rod slides under the action of the pressure and extrudes the second sealing ring, so that the second sealing ring seals a gap between the transmission sealing rod and the sealing wheel, and the sealing effect is improved;

3. be provided with the heat dissipation fan, drive pivoted heat dissipation fan through the screw rod main part and pass through the air flow and take away the heat that motor work in-process and screw rod main part rotate the in-process and produce, avoid the high temperature of motor and screw rod main part to cause unusual wearing and tearing and damage.

Drawings

FIG. 1 is a schematic view of the overall sectional view of the present invention;

FIG. 2 is a schematic overall front sectional view of the present invention;

fig. 3 is the cross-sectional structural schematic diagram of the screw rod main body and the first sealing ring of the present invention.

In the figure: 1. a pump body; 11. a feed pipe; 12. a discharge pipe; 13. a seal wheel; 2. a motor; 21. a driving rack bar; 22. a driven rack bar; 23. a heat dissipation fan; 3. a screw body; 31. an air inlet; 32. a pressure chamber; 33. an air outlet; 34. a first seal ring; 4. a drive seal rod; 41. and a second seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an independent cavity double containment screw vacuum pump, includes the pump body 1, motor 2, screw rod main part 3 and transmission sealing rod 4, and motor 2 is installed to the side surface of the pump body 1, and the inside symmetry of the pump body 1 is provided with 2 screw rod main parts 3, and the one end that screw rod main part 3 is close to motor 2 is connected with transmission sealing rod 4.

The one end upper surface that the pump body 1 is close to motor 2 is provided with inlet pipe 11, and the one end lower surface that the motor 2 was kept away from to the pump body 1 is provided with discharging pipe 12, and the one end inside that the pump body 1 is close to motor 2 is provided with sealing wheel 13, and rethread discharging pipe 12 is discharged behind the inlet pipe 11 with gaseous suction pump body 1.

The surface that the one end that motor 2 is close to the pump body 1 runs through the pump body 1 is connected with initiative ratch 21, the surface of initiative ratch 21 is connected with driven ratch 22, and the surface that the one end that driven ratch 22 is close to motor 2 runs through the pump body 1 is connected with heat dissipation fan 23, motor 2 drives initiative ratch 21 and rotates, initiative ratch 21 drives driven ratch 22 through the meshing with driven ratch 22 and rotates, driven ratch 22 drives heat dissipation fan 23 and rotates and dispel the heat to the vacuum pump.

The both ends of the transmission sealing rod 4 of motor 2 one side block with initiative ratch 21 and screw rod main part 3 respectively, and the both ends of the transmission sealing rod 4 of heat dissipation fan 23 one side block with driven ratch 22 and screw rod main part 3 respectively, and initiative ratch 21 and driven ratch 22 drive 2 screw rod main parts 3 respectively through transmission sealing rod 4 and carry out the rotation that rotates opposite direction.

The screw main bodies 3 are symmetrically distributed on two sides of the central line of the pump body 1, the thread directions of the screw main bodies 3 are opposite, and the screw main bodies 3 synchronously rotate in opposite directions at high speed to generate air suction and exhaust effects.

The one end surface that screw rod main part 3 is close to motor 2 has seted up inlet port 31, the inside pressure chamber 32 that is provided with of one end that sets up inlet port 31 in screw rod main part 3, screw rod main part 3 is close to the embedded first sealing washer 34 of installing of one end surface of motor 2, venthole 33 has been seted up to the surface of screw rod main part 3 between first sealing washer 34 and the pressure chamber 32, pressure increase in the pressure chamber 32, first sealing washer 34 remains the state of laminating with the inner wall of screw rod main part 3 and the connecting portion of the pump body 1 all the time under the effect of the pressure that has venthole 33 to apply at pressure chamber 32.

The driving toothed bar 21 is meshed with the driven toothed bar 22, one ends of the driving toothed bar 21 and the driven toothed bar 22 are connected with the transmission sealing bar 4 in a sliding mode, and the driving toothed bar 21 and the driven toothed bar 22 are connected with the transmission sealing bar 4 in a sliding mode, so that the transmission sealing bar 4 can slide when being pressed and is attached to the second sealing ring 41, and meanwhile the driving toothed bar 21 and the driven toothed bar 22 are clamped.

The working principle is as follows: when the independent cavity double-seal screw vacuum pump is used, firstly, as shown in fig. 1-3, a motor 2 is started, the motor 2 drives a driving rack bar 21 to rotate, the driving rack bar 21 drives a driven rack bar 22 to rotate, the driving rack bar 21 and the driven rack bar 22 respectively drive 2 screw main bodies 3 to synchronously rotate at high speed in opposite directions through a transmission seal rod 4, the 2 screw main bodies 3 rotate to generate suction force and suck air through a feeding pipe 11, and after the 2 screw main bodies 3 are compressed, the air is discharged through a discharge pipe 12 below a pump body 1, so that the normal working process of the screw main body vacuum pump is completed;

along with the rotation of the screw body 3, the first sealing ring 34 rubs with the inner wall of the connecting part of the screw body 3 and the pump body 1 to generate loss, at the moment, the pressure in the pump body 1 is transmitted into the pressure chamber 32 through the air inlet hole 31, the pressure in the pressure chamber 32 is transmitted between the first sealing ring 34 and the screw body 3 through the air outlet hole 33, the first sealing ring 34 expands towards the inner wall close to the connecting part of the screw body 3 and the pump body 1 under the action of the pressure and is always kept in a state of being attached to the inner wall of the connecting part of the screw body 3 and the pump body 1, and the first sealing ring 34 is enabled to keep good sealing effect;

when the first sealing ring 34 is worn out completely, pressure acts between the transmission sealing rod 4 and the screw rod main body 3, the transmission sealing rod 4 slides under the action of the pressure, at the moment, the second sealing ring 41 between the transmission sealing rod 4 and the sealing wheel 13 is extruded to deform, so that the gap between the transmission sealing rod 4 and the sealing wheel 13 is sealed, the gas in the pump body 1 is ensured not to enter the gear box where the driving toothed bar 21 and the driven toothed bar 22 are positioned, simultaneously at the rotatory in-process of driven ratch 22, driven ratch 22 drives heat dissipation fan 23 and rotates, and heat dissipation fan 23 is taken away the heat that screw rod main part 3 and motor 2 during operation produced through driving the air flow, has guaranteed that motor 2 and screw rod main part 3 can keep normal temperature under long-time work, avoids motor 2 and screw rod main part 3 to take place unusual damage and wearing and tearing, has increased holistic practicality.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an independent cavity dual-seal screw vacuum pump, includes the pump body (1), motor (2), screw rod main part (3) and transmission sealing rod (4), its characterized in that: the motor (2) is installed to the side surface of the pump body (1), and the inside symmetry of the pump body (1) is provided with 2 screw rod main parts (3), the one end that screw rod main part (3) are close to motor (2) is connected with transmission sealing rod (4).

2. The dual-seal screw vacuum pump with independent cavities according to claim 1, wherein: the one end upper surface that the pump body (1) is close to motor (2) is provided with inlet pipe (11), the one end lower surface that motor (2) were kept away from in the pump body (1) is provided with discharging pipe (12), the inside sealing wheel (13) that is provided with of one end that the pump body (1) is close to motor (2).

3. The dual-seal screw vacuum pump with independent cavities according to claim 1, wherein: the surface that the one end that motor (2) is close to the pump body (1) runs through the pump body (1) is connected with initiative ratch (21), the surface of initiative ratch (21) is connected with driven ratch (22), and the surface that the one end that driven ratch (22) is close to motor (2) runs through the pump body (1) is connected with heat dissipation fan (23).

4. The dual-seal screw vacuum pump with independent cavities according to claim 3, wherein: the two ends of the transmission sealing rod (4) on one side of the motor (2) are respectively clamped with the driving toothed rod (21) and the screw rod main body (3), and the two ends of the transmission sealing rod (4) on one side of the heat dissipation fan (23) are respectively clamped with the driven toothed rod (22) and the screw rod main body (3).

5. The dual-seal screw vacuum pump with independent cavities according to claim 1, wherein: the screw rod main bodies (3) are symmetrically distributed on two sides of the center line of the pump body (1), and the thread directions of the screw rod main bodies (3) are opposite.

6. The dual-seal screw vacuum pump with independent cavities according to claim 1, wherein: the outer surface of one end, close to the motor (2), of the screw rod main body (3) is provided with an air inlet hole (31), a pressure chamber (32) is arranged inside one end, close to the motor (2), of the screw rod main body (3), a first sealing ring (34) is installed on the outer surface of one end, close to the motor (2), of the screw rod main body (3), and an air outlet hole (33) is formed in the outer surface of the screw rod main body (3) between the first sealing ring (34) and the pressure chamber (32).

7. The dual-seal screw vacuum pump with independent cavities according to claim 3, wherein: the driving toothed bar (21) is meshed with the driven toothed bar (22), one ends of the driving toothed bar (21) and the driven toothed bar (22) are in sliding connection with the transmission sealing rod (4), and an annular second sealing ring (41) is arranged between the transmission sealing rod (4) and the sealing wheel (13).