KR101729849B1

KR101729849B1 - Screw type vacuum pump

Info

Publication number: KR101729849B1
Application number: KR1020150098937A
Authority: KR
Inventors: 윤원성
Original assignee: 윤원성
Priority date: 2015-07-13
Filing date: 2015-07-13
Publication date: 2017-05-11
Also published as: KR20170007921A

Abstract

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screw vacuum pump capable of increasing the vacuum capacity of a vacuum pump without increasing the area of the housing, the first suction port being formed at one end and the second suction port ; A first partition wall formed in the housing to form a first compression space inside the housing on the second discharge port side and having a second suction port; A second partition wall formed in the housing to form a second compression space inside the housing on the first suction port side and having a first discharge port; A driving shaft and a driven shaft formed parallel to each other through the housing; A screw coupled to the drive shaft and the driven shaft respectively in the first compression space; And a rotor coupled to the drive shaft and the driven shaft in the second compression space, respectively.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a vacuum pump, and more particularly, to a screw vacuum pump capable of increasing a vacuum capacity without increasing the area of a housing by using a screw.

Generally, a vacuum pump to which a screw is applied, for example, a device for removing gas molecules in an airtight container, sucks the gas at a low pressure below atmospheric pressure, compresses it and discharges it to the atmosphere to increase the degree of vacuum in the container.

These vacuum pumps are largely classified into mechanical vacuum pumps and diffusion / ion pumps, which are represented as dry and wet respectively. Unlike diffusion / ion pump which is wet type using oil or mercury to realize high vacuum, mechanical vacuum pump has relatively low degree of vacuum, but it is dry type without oil, so its structure is relatively simple and durable. In addition, since it shows a stable degree of vacuum, it is widely used in various industrial fields because it can be operated easily by a user and has a low cost to maintain.

1 schematically shows a conventional screw vacuum pump.

1, the screw vacuum pump includes a housing 10 having a suction port 11 and a discharge port 12 and having a compression space formed therein, and a compression mechanism for compressing the gas through the housing 10 A driving motor 50 for transmitting power to the driving shaft 20 and a driving motor 50 for driving the driving shaft 20 to be driven by the driving shaft 20, And gears 21 and 31 for transmitting the same to the coaxial shaft 30.

When the driving motor 50 provided in the driving shaft 20 is driven, the driving shaft 20 rotates. The gear 31 of the driven shaft 30 engaged with the gear 21 provided on the drive shaft 20 rotates and the driven shaft 30 rotates in conjunction therewith. Accordingly, the screw 40 provided on the driving shaft 20 and the driven shaft 30 is rotated in the interlocked state, so that the air pressure inside the housing 10 becomes lower than the external air pressure. Thus, the gas is introduced into the inlet 11, compressed, and then discharged through the outlet 12.

However, in such a screw vacuum pump, when the sucked gas is transferred to the next stage in the housing, the vacuum back-up is caught and the vacuum is too small.

To solve such a problem, there arises a problem that the area of the housing must be increased in order to increase the vacuum capacity.

A problem to be solved by the present invention is to increase the vacuum capacity of the vacuum pump without increasing the area of the housing in the screw vacuum pump.

The various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

A screw vacuum pump according to an embodiment of the present invention includes a housing having a first inlet formed at one end thereof and a second outlet formed at the other end thereof, A second partition wall formed in the housing to form a second compression space inside the housing on the first suction port side and having a first discharge port formed therein, And a rotor coupled to the drive shaft and the driven shaft in the second compression space, respectively. The drive shaft and the driven shaft are coupled to the drive shaft and the driven shaft in the first compression space.

The screw vacuum pump according to an embodiment of the present invention may further include a driving motor for providing driving force to the driving shaft and the driven shaft, and gears for transmitting the driving force of the driving motor to the driving shaft and the driven shaft. have.

The screw vacuum pump according to an embodiment of the present invention may further include a compression buffer space formed in the housing between the first bank and the second bank.

The details of other embodiments are included in the detailed description and drawings.

The screw vacuum pump according to various embodiments of the technical idea of the present invention can increase the vacuum capacity without increasing the housing area of the vacuum pump and has the advantage of manufacturing a high vacuum high vacuum pump at low cost.

Various other effects of the present invention will be mentioned in the text.

Figure 1 schematically shows a screw vacuum pump according to the prior art,
FIG. 2 is a schematic view of a screw vacuum pump according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Like reference numerals designate the same or functionally similar elements throughout the specification. Accordingly, although the same reference numerals or similar reference numerals are not mentioned or described in the drawings, they may be described with reference to other drawings. Further, even if the reference numerals are not shown, they can be described with reference to other drawings.

FIG. 2 is a schematic view of a screw vacuum pump according to an embodiment of the present invention.

Referring to FIG. 2, a screw vacuum pump according to an embodiment of the present invention includes a housing 100, a drive shaft 200, a slave shaft 300, a first screw 410, a second screw 420, A first rotor 510, a second rotor 520, and a drive motor 600.

The housing 100 forms a compression space of a vacuum pump therein. The housing 100 has a first suction port 101 formed at one end thereof and a second discharge port 104 formed at the other end thereof. The first and second barrier ribs 110 and 120 may be formed in the housing 100. The second partition 120 may form a compression space in the housing 100 on the first suction port 101 side and the first discharge port 102 may be formed on the second partition 120. The first partition 110 may form a compression space in the housing 100 on the second outlet 104 side and the second inlet 103 may be formed on the first partition 110. A compression buffer space may be formed inside the housing 100 between the first bank 110 and the second bank 120.

The drive shaft 200 may be formed through the housing 100 and may be rotated by a driving force.

The driven shaft 200 may be formed parallel to the drive shaft 200 through the silver housing 100 and may be rotated depending on the rotation of the driving force 200.

The gear 210 and the gear 220 are coupled to the driving shaft 200 and the driven shaft 300 so that the driving force of the driving shaft 200 can be transmitted to the driven shaft 300.

The first screw 410 and the second screw 420 are located in the compression space defined by the housing 100 and the first partition 110 and can be coupled to the drive shaft 200 and the driven shaft 300, The gas in the compression space can be compressed during rotation.

The first rotor 510 and the second rotor 520 are located in the compression space defined by the housing 100 and the second partition 120 and can be coupled to the drive shaft 200 and the driven shaft 300, The gas in the compression space can be compressed by the rotation. The first rotor 510 and the second rotor 520 may be formed of a screw rotor. The first rotor 510 and the second rotor 520 may be formed of a roots rotor.

The driving motor 600 generates driving force by rotation.

In the screw vacuum pump according to the embodiment of the present invention as described above, the driving force of the driving motor 600 causes rotation of the driving shaft 200 and the driven shaft 300 interlocked with the rotation of the driving shaft 200, The gas in the compression space formed by the second partition 120 and the housing 100 is compressed by the rotation of the first rotor 510 and the second rotor 520 coupled to the coaxial shaft 300. As a result, the gas is sucked from the first suction port 101 into the housing 100 and the outside of the first suction port 101 forms a vacuum.

The gas compressed by the first rotor 510 and the second rotor 520 is separated by the first partition wall 110 and the second partition wall 120 through the first discharge port 102 formed in the second partition wall 120 And is discharged into the formed compression buffer space.

The gas in the compression space formed by the first partition wall 110 and the housing 100 by the rotation of the first screw 410 and the second screw 420 coupled to the drive shaft 200 and the driven shaft 300 And the gas introduced into the compression buffer space by the first rotor 510 and the second rotor 520 flows through the first partition wall 110 and the housing 100 through the second suction port 103 formed in the first partition wall 110, Is sucked into the compression space formed by the compressor 100, and the inside of the compression buffer space forms a vacuum.

The gas compressed by the first screw 410 and the second screw 420 is discharged to the outside of the housing 100 through the second outlet 104. Since the compression buffer space is formed in the previous stage in the gas sucked by the first screw 410 and the second screw 420, it is possible to increase the vacuum capacity because the back vacuum is not applied unlike the prior art.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative and not restrictive in every respect.

100: housing, 101: first intake port,
102: first outlet, 103: second inlet,
104: second outlet, 110: first partition,
120: second partition wall, 200: drive shaft
210, 220: gear, 300:
410, 420: screw 510, 520: rotor
600: drive motor

Claims

A housing having a first inlet formed at one end thereof and a second outlet formed at the other end thereof;
A first partition wall formed in the housing to form a first compression space inside the housing on the second discharge port side and a second suction port formed in a central portion;
A second partition wall formed in the housing to form a second compression space inside the housing on the first suction port side and having a first discharge port formed at one end portion;
A driving shaft and a driven shaft formed parallel to each other through the housing;
A screw coupled to the drive shaft and the driven shaft respectively in the first compression space; And
And a roots rotor comprising a first rotor and a second rotor respectively coupled to the drive shaft and the driven shaft in the second compression space,
A driving motor for providing driving force to the driving shaft and the driven shaft; And
And gears for transmitting the driving force of the driving motor to the driving shaft and the driven shaft,
The compressed gas is sucked into the first compression space after the compressed gas is introduced into the roots rotor and is formed in the housing between the first partition and the second partition to form a vacuum state A screw vacuum pump containing a compression buffer space.

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