CN208831242U - High-reliable energy-saving variable pitch screw vacuum pump - Google Patents
High-reliable energy-saving variable pitch screw vacuum pump Download PDFInfo
- Publication number
- CN208831242U CN208831242U CN201820656726.4U CN201820656726U CN208831242U CN 208831242 U CN208831242 U CN 208831242U CN 201820656726 U CN201820656726 U CN 201820656726U CN 208831242 U CN208831242 U CN 208831242U
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- nitrogen
- rotating shaft
- central rotating
- vacuum pump
- pump case
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Abstract
A kind of high-reliable energy-saving variable pitch screw vacuum pump of the utility model, the vacuum pump includes pump case (1), it is worn in the pump case (1) and is connected to screw rod (3), the screw rod (3) is driven by power head (2) to rotate, the screw rod (3) includes to drive the central rotating shaft (3.1) being connected with power head (2), spiral winding has spiral bar (3.2) on the central rotating shaft (3.1), and the thickness of spiral bar (3.2) is gradually reduced from inlet end to outlet side, composition helicla flute (3.3) between the spiral bar (3.2) of setting is curled up on above-mentioned central rotating shaft (3.1), and the width of helicla flute (3.3) is gradually reduced from inlet end to outlet side.A kind of high-reliable energy-saving variable pitch screw vacuum pump of the utility model, low energy consumption and noise is small.
Description
Technical field
The utility model relates to a kind of vacuum pumps to have more particularly, to a kind of vacuum pump with varying pitch structure
The advantages of energy-saving and environmental protection, low noise, belongs to vacuum pump technology field.
Background technique
Screw vacuum pump belongs to dry vacuum pump, will not vacuum system be polluted and not had during the work time
Oil spout and oil extraction mist phenomenon；Compared with water ring vacuum pump, without sewage discharge, energy saving, tail gas is easy recycling.Existing routine
Vacuum pump be to make high speed rotation in pump case and the air-extractor of air-breathing and scavenging action that generates using screw rod or worm screw,
Screw rod or worm screw correct through fine dynamic balance, by bearing support, are mounted in pump case.Existing screw vacuum pump is uniform pitch
Screw vacuum pump, constant lead screw vacuum pump are returned gas and are repeated reflux compression, exhaust due to isometric(al) compression in pumping, outlet High Pressure Difference
Temperature is very high, and such as external tonifying Qi cooling effect is bad, will cause rotor and casing deformation, reduces the service life of bearing and sealing,
Pumping effect is influenced, while outlet pulses are big, need to install noise elimination device under normal circumstances.
Summary of the invention
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of high-reliable energy-savings that low energy consumption and noise is small
Variable pitch screw vacuum pump.
Purpose of the utility model is realized as follows:
A kind of high-reliable energy-saving variable pitch screw vacuum pump, the vacuum pump include pump case, wear and connect in the pump case
There is screw rod, the screw rod is driven by power head to be rotated,
The screw rod includes to drive the central rotating shaft being connected with power head, and spiral winding has spiral on the central rotating shaft
Item, and the thickness of spiral bar is gradually reduced from inlet end to outlet side, between the spiral bar that setting is curled up on above-mentioned central rotating shaft
Helicla flute is constituted, and the width of helicla flute is gradually reduced from inlet end to outlet side, is arranged between the central rotating shaft and pump case
There is seal assembly, the seal assembly includes mechanical sealing member, nitrogen-sealed part and lip seal, nitrogen-sealed part position
Between mechanical sealing member and lip seal, the nitrogen-sealed part includes a cyclic structure part, the cyclic structure part it is outer
Outer nitrogen bath and interior nitrogen bath are respectively arranged on anchor ring and inner ring surface, above-mentioned outer nitrogen bath and pump case constitute outer nitrogen-sealed
Circle, interior nitrogen bath and central rotating shaft constitute interior nitrogen-sealed circle, are provided on the cyclic structure part multiple for being connected to outer nitrogen
The venthole of air drain and interior nitrogen bath, the nitrogen air inlet being arranged on the pump case are connected with outer nitrogen bath, the nitrogen air inlet
Hole is connected with elevated pressure nitrogen gas source.
A kind of high-reliable energy-saving variable pitch screw vacuum pump of the utility model is worn on the shell wall of the pump case and is connected to more
Sewage pipe.
Compared with prior art, the utility model has the beneficial effects that
The utility model screw vacuum pump makees synchronous high-speed reverse rotation using a pair of of screw rod in pump case and generates air-breathing
And scavenging action, major advantage be it is compact-sized, the service life is long, dynamic balance is good, without lubrication, pumping speed is big, is applicable to take out
Except general air and various special gas, and to pumped gas and environment without oil vapour pollution, no discharging of waste liquid；Two screw rods are adopted
It is arranged with spiral shell spacing is become, and radius of fillet is successively successively decreased by the lateral outlet side of air inlet, can effectively guarantee the intracorporal gas of pump case
Body flows smoothly, and avoids the occurrence of outlet High Pressure Difference and returns gas repetition reflux compression phenomena, effectively reduces delivery temperature, reduce energy
Source consumption.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram (stereoscopic effect of high-reliable energy-saving variable pitch screw vacuum pump of the utility model
Schematic diagram.).
Fig. 2 is a kind of partial enlargement diagram of Fig. 1 of high-reliable energy-saving variable pitch screw vacuum pump of the utility model.
Fig. 3 is a kind of cross-sectional view of high-reliable energy-saving variable pitch screw vacuum pump of the utility model.
Wherein:
Pump case 1, power head 2, screw rod 3, seal assembly 4, sewage pipe 5；
Central rotating shaft 3.1, spiral bar 3.2, helicla flute 3.3；
Mechanical sealing member 4.1, nitrogen-sealed part 4.2, lip seal 4.3.
Specific embodiment
Referring to Fig. 1~3, the utility model relates to a kind of high-reliable energy-saving variable pitch screw vacuum pump, the vacuum
Pump includes pump case 1, wears in the pump case 1 and is connected to screw rod 3, and the screw rod 3 is driven by power head 2 to be rotated, it is characterised in that:
The screw rod 3 includes to drive the central rotating shaft 3.1 being connected with power head 2, and spiral twines on the central rotating shaft 3.1
It is wound with spiral bar 3.2, and the thickness of spiral bar 3.2 is gradually reduced (i.e. to the left by diagramatic way right end from inlet end to outlet side
End is sequentially reduced), it curls up on above-mentioned central rotating shaft 3.1 and constitutes helicla flute 3.3 between the spiral bar 3.2 of setting, and helicla flute 3.3
Width be gradually reduced and (be sequentially reduced from diagramatic way right end to left end) from inlet end to outlet side, the central rotating shaft
Seal assembly 4 is provided between 3.1 and pump case 1, the seal assembly 4 includes mechanical sealing member 4.1, nitrogen-sealed part 4.2
With lip seal 4.3, for the nitrogen-sealed part 4.2 between mechanical sealing member 4.1 and lip seal 4.3, the nitrogen is close
Sealing 4.2 includes a cyclic structure part, be respectively arranged on the outer ring surface and inner ring surface of the cyclic structure part outer nitrogen bath and
Interior nitrogen bath, above-mentioned outer nitrogen bath and pump case 1 constitute outer nitrogen-sealed circle, and interior nitrogen bath and central rotating shaft 3.1 constitute interior nitrogen
Sealing ring is provided on the cyclic structure part multiple for being connected to the ventholes of outer nitrogen bath and interior nitrogen bath, the pump case 1
The nitrogen air inlet of upper setting is connected with outer nitrogen bath, which is connected with elevated pressure nitrogen gas source, for importing nitrogen
Gas；
Further, it is worn on the shell wall of the pump case 1 and is connected to more sewage pipes 5, for exporting the dirt in pump case 1, and
Blowdown valve is installed on sewage pipe 5；
In addition: it should be noted that above-mentioned specific embodiment is only a prioritization scheme of this patent, the skill of this field
Any change or improvement that art personnel are done according to above-mentioned design, within the protection domain of this patent..
Claims (1)
1. a kind of high-reliable energy-saving variable pitch screw vacuum pump, the vacuum pump includes pump case (1), in the pump case (1)
It wears and is connected to screw rod (3), the screw rod (3) is driven by power head (2) to rotate, it is characterised in that:
The screw rod (3) includes to drive the central rotating shaft (3.1) being connected, spiral shell on the central rotating shaft (3.1) with power head (2)
Rotation is wound with spiral bar (3.2), and the thickness of spiral bar (3.2) is gradually reduced from inlet end to outlet side, above-mentioned central rotating shaft
(3.1) curl up between the spiral bar (3.2) of setting composition helicla flute (3.3) on, and the width of helicla flute (3.3) from inlet end to
Outlet side is gradually reduced, and is provided with seal assembly (4), the seal assembly between the central rotating shaft (3.1) and pump case (1)
It (4) include mechanical sealing member (4.1), nitrogen-sealed part (4.2) and lip seal (4.3), nitrogen-sealed part (4.2) position
Between mechanical sealing member (4.1) and lip seal (4.3), the nitrogen-sealed part (4.2) includes a cyclic structure part, should
Outer nitrogen bath and interior nitrogen bath, above-mentioned outer nitrogen bath and pump case are respectively arranged on the outer ring surface and inner ring surface of cyclic structure part
(1) outer nitrogen-sealed circle is constituted, interior nitrogen bath and central rotating shaft (3.1) constitute interior nitrogen-sealed circle, on the cyclic structure part
Be provided with it is multiple for being connected to the ventholes of outer nitrogen bath and interior nitrogen bath, the nitrogen air inlet being arranged on the pump case (1) with
Outer nitrogen bath is connected, which is connected with elevated pressure nitrogen gas source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820656726.4U CN208831242U (en) | 2018-05-03 | 2018-05-03 | High-reliable energy-saving variable pitch screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820656726.4U CN208831242U (en) | 2018-05-03 | 2018-05-03 | High-reliable energy-saving variable pitch screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208831242U true CN208831242U (en) | 2019-05-07 |
Family
ID=66304313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820656726.4U Active CN208831242U (en) | 2018-05-03 | 2018-05-03 | High-reliable energy-saving variable pitch screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208831242U (en) |
-
2018
- 2018-05-03 CN CN201820656726.4U patent/CN208831242U/en active Active
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