CN209724664U - A kind of varying pitch dry screw vacuum pump - Google Patents
A kind of varying pitch dry screw vacuum pump Download PDFInfo
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- CN209724664U CN209724664U CN201822155086.1U CN201822155086U CN209724664U CN 209724664 U CN209724664 U CN 209724664U CN 201822155086 U CN201822155086 U CN 201822155086U CN 209724664 U CN209724664 U CN 209724664U
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- vacuum pump
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- varying pitch
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Abstract
The utility model relates to vacuum pump technology fields, and disclose a kind of varying pitch dry screw vacuum pump, including the pump housing and motor, left end fixation at the top of the pump housing is communicated with air inlet, the left end fixation of the pump housing bottom is communicated with gas outlet, cooling chamber is provided at the top and bottom of the pump housing inner cavity, the quantity of the cooling chamber is two, and the fixation of the top of two cooling chambers is communicated with adding mouth.The varying pitch dry screw vacuum pump, by the pump housing be internally provided with driving screw rod and driven screw and spacing on the left of the outer surface of driving screw rod and driven screw between flood dragon is greater than spacing between the flood dragon of right side, become larger the pressure of driving screw rod and driven screw in rotation to medium, it avoids medium and leads to the problem of reflux, it ensure that the service life of the vacuum pump, the noise when vibration sky pump operation is reduced, the practicability of the vacuum pump is effectively raised.
Description
Technical field
The utility model relates to vacuum pump technology field, specially a kind of varying pitch dry screw vacuum pump.
Background technique
Screw vacuum pump is to make air-breathing and exhaust that synchronous high-speed is reversely rotated and generated in pump case using a pair of of screw rod
The air-extractor of effect, it is the renewal product of oil sealing vacuum pump, can extract and contain a large amount of water vapours and a small amount of dust
Gas occasion, at home pharmacy, chemical industry, semiconductor etc. to cleaning the higher enterprise field of vacuum requirement be used widely.
The operating pressure of vacuum pump is to determine that i.e. gas outlet resistance determines, existing screw vacuum by gas outlet load
Pump is uniform pitch dry screw vacuum pump mostly, i.e. the distance between two screw rods are fixed, therefore two screw rods are rotating
When to medium pressure be it is certain, when pressure be less than resistance to flow output when, then can generate medium back flow phenomenon, lead to dielectric corrosion
The coating of screw rod and pump chamber reduces the service life of vacuum pump, and when the pressure that screw rod generates is less than gas outlet resistance,
Gas outlet usually can generate noise, in addition, existing vacuum pump is at runtime, since two screw rods run at high speed with vibration
A large amount of heat can be generated, due to expanding with heat and contract with cold, the distance between screw rod is will lead to and changes, cause between screw rod
Frictional force becomes larger, and influences the normal use of vacuum pump, while also affecting the sealing performance of vacuum pump, therefore, needs to produce
A kind of varying pitch dry screw vacuum pump solves problem above.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of varying pitch dry screw vacuum pump, and having prevents
Medium back flow reduces vibration, reduces the advantages of noise and good heat dissipation effect, and solving existing screw vacuum pump mostly is to wait spiral shells
Away from dry screw vacuum pump, i.e. the distance between two screw rods are fixed, thus two screw rods rotation when to medium pressure
Power be it is certain, when pressure is less than resistance to flow output, then can generate medium back flow phenomenon, lead to dielectric corrosion screw rod and pump chamber
Coating reduces the service life of vacuum pump, and when the pressure that screw rod generates is less than gas outlet resistance, gas outlet usually can
With vibration, noise is generated, in addition, existing vacuum pump is at runtime, can be generated largely since two screw rods run at high speed
Heat will lead to the distance between screw rod and change due to expanding with heat and contract with cold, and frictional force between screw rod is caused to become larger,
The problem of influencing the normal use of vacuum pump, while also affecting vacuum pump sealing performance.
The utility model provides the following technical solutions: a kind of varying pitch dry screw vacuum pump, including the pump housing and motor, institute
It states the left end fixation at the top of the pump housing and is communicated with air inlet, the left end fixation of the pump housing bottom is communicated with gas outlet, the pump housing
Cooling chamber is provided at the top and bottom of inner cavity, the quantity of the cooling chamber is two, and the top of two cooling chambers is equal
Fixation is communicated with adding mouth, and the outside of the motor is fixedly installed with electric motor protecting box, and the output shaft of the motor is fixedly connected
Have a driving shaft, the left end of the driving shaft through the pump housing and extend to the pump housing inside and with the inner wall movable sleeve on the left of the pump housing
It connects, from left to right successively fixing sleeve is connected to female gear and driving screw rod, the pump housing inner cavity left side for the outer surface of the driving shaft
Movable sleeve is connected to driven shaft between right side, the outer surface of the driven shaft from left to right successively fixing sleeve be connected to sub- gear and from
Dynamic screw rod, the output shaft of the motor and the junction of driving shaft are fixedly installed with sealing ring.
Preferably, the quantity of the adding mouth is two, and the equal screw thread in the inside of two adding mouths is socketed with plug.
Preferably, the quantity of the plug is two, and the top of two plugs is fixedly installed with swing handle, institute
The outer surface for stating swing handle is equipped with anti-skid chequer.
Preferably, the gear size of female gear and the engagement connection of sub- gear, mother's gear and sub- gear is adapted.
Preferably, the driving screw rod and driven screw engagement connection, the outer surface of the driving screw rod and driven screw
Spacing between the flood dragon of left side is greater than the spacing between the flood dragon of right side.
Preferably, two mutually close sides of the cooling chamber are fixedly installed with bushing, and the quantity of the bushing is two,
Central symmetry of two bushings about the pump housing.
Be compared with the prior art, the utility model have it is following the utility model has the advantages that
1, varying pitch dry screw vacuum pump, by being internally provided with driving screw rod and driven screw and master in the pump housing
Spacing on the left of the outer surface of dynamic screw rod and driven screw between flood dragon is greater than the spacing between the flood dragon of right side, make driving screw rod and
Driven screw becomes larger in rotation to the pressure of medium, avoids and generates medium back flow phenomenon, leads to dielectric corrosion screw rod
Usually can be with vibration with the coating of pump chamber and gas outlet the problem of, it ensure that the service life of the vacuum pump, reduce the shake
Noise when dynamic sky pump operation, effectively raises the practicability of the vacuum pump.
2, varying pitch dry screw vacuum pump, by the way that cooling chamber is arranged, using between cooling chamber, adding mouth and plug
It cooperates, the generation in rotation of driving screw rod and driven screw can be effectively reduced to coolant liquid is added in cooling chamber
Heat, avoid the problem of frictional force becomes larger between driving screw rod and driven screw, ensure that the service life of the vacuum pump,
Effectively raise the leakproofness of the vacuum pump.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the utility model；
Fig. 2 is the appearance diagram of the utility model Fig. 1；
Fig. 3 is the enlarged diagram at the utility model A.
In figure: 1, the pump housing；2, air inlet；3, gas outlet；4, cooling chamber；5, adding mouth；6, plug；7, swing handle；8,
Motor；9, electric motor protecting box；10, driving shaft；11, female gear；12, driving screw rod；13, driven shaft；14, sub- gear；15, driven
Screw rod；16, sealing ring；17, bushing.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1-3, a kind of varying pitch dry screw vacuum pump, including the pump housing 1 and motor 8, the left end at 1 top of the pump housing
Fixed to be communicated with air inlet 2, the left end fixation of 1 bottom of the pump housing is communicated with gas outlet 3, and the pump housing is all provided at the top and bottom of 1 inner cavity
It is equipped with cooling chamber 4, the quantity of cooling chamber 4 is two, and two mutually close sides of cooling chamber 4 are fixedly installed with bushing 17, bushing
17 quantity is two, central symmetry of two bushings 17 about the pump housing 1, ensure that driving screw rod 12 and driven screw 15 rotate
When stability, improve the efficiency of the vacuum pump, the fixation of the top of two cooling chambers 4 is communicated with adding mouth 5, adding mouth 5
Quantity be two, the equal screw thread in the inside of two adding mouths 5 is socketed with plug 6, and the quantity of plug 6 is two, two plugs 6
Top is fixedly installed with swing handle 7, and the outer surface of swing handle 7 is equipped with anti-skid chequer, increases operator's hand and rotation
Frictional force between handle 7 is prevented when rotating swing handle 7 there is a phenomenon where skidding, and the outside of motor 8 is fixedly installed with electricity
Machine protecting box 9, the model Y80-355 of motor 8, the output shaft of motor 8 are fixedly connected with driving shaft 10, the left end of driving shaft 10
Through the pump housing 1 and extend to the inside of the pump housing 1 and the inner wall pivot bush unit with the left side of the pump housing 1, the outer surface of driving shaft 10 is from a left side
Female gear 11 and driving screw rod 12, driving screw rod 12 and the engagement connection of driven screw 15, active spiral shell are connected to right successively fixing sleeve
Spacing on the left of the outer surface of bar 12 and driven screw 15 between flood dragon is greater than the spacing between the flood dragon of right side, female gear 11 and son
The gear size of the engagement connection of gear 14, female gear 11 and sub- gear 14 is adapted, movable between 1 inner cavity left and right side of the pump housing
It is socketed with driven shaft 13, from left to right successively fixing sleeve is connected to sub- gear 14 and driven screw 15 for the outer surface of driven shaft 13, electricity
The output shaft of machine 8 and the junction of driving shaft 10 are fixedly installed with sealing ring 16, prevent driving shaft 10 from making external sky in rotation
Gas enters inside the pump housing 1, ensure that the leakproofness inside the pump housing 1.
When work, first the vacuum pump is fixedly mounted, swing handle 7 is then turned and takes out plug 6 out of adding mouth 5,
After pouring into coolant liquid into cooling chamber 4, then by plug 6 and the socket of 5 screw thread of adding mouth, then starts motor 8 and start to work, work
After, motor 8 is closed, and how much check the coolant liquid in cooling chamber 4, guarantees that coolant liquid is sufficient.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of varying pitch dry screw vacuum pump, including the pump housing (1) and motor (8), it is characterised in that: the pump housing (1) top
The left end fixation in portion is communicated with air inlet (2), and the left end fixation of the pump housing (1) bottom is communicated with gas outlet (3), the pump housing
(1) it is provided at the top and bottom of inner cavity cooling chamber (4), the quantity of the cooling chamber (4) is two, two cooling chambers
(4) the fixation of top is communicated with adding mouth (5), and the outside of the motor (8) is fixedly installed with electric motor protecting box (9), described
The output shaft of motor (8) is fixedly connected with driving shaft (10), and the left end of the driving shaft (10) through the pump housing (1) and extends to pump
The inside of body (1) and with the inner wall pivot bush unit on the left of the pump housing (1), the outer surface of the driving shaft (10) is from left to right successively solid
Surely it is socketed with female gear (11) and driving screw rod (12), movable sleeve is connected to driven between the left and right side of the pump housing (1) inner cavity
Axis (13), from left to right successively fixing sleeve is connected to sub- gear (14) and driven screw (15) for the outer surface of the driven shaft (13),
The output shaft of the motor (8) and the junction of driving shaft (10) are fixedly installed with sealing ring (16).
2. a kind of varying pitch dry screw vacuum pump according to claim 1, it is characterised in that: the adding mouth (5)
Quantity is two, and the equal screw thread in inside of two adding mouths (5) is socketed with plug (6).
3. a kind of varying pitch dry screw vacuum pump according to claim 2, it is characterised in that: the number of the plug (6)
Amount is two, and the top of two plugs (6) is fixedly installed with swing handle (7), the outer surface of the swing handle (7)
Equipped with anti-skid chequer.
4. a kind of varying pitch dry screw vacuum pump according to claim 1, it is characterised in that: it is described mother gear (11) and
The gear size of sub- gear (14) engagement connection, mother's gear (11) and sub- gear (14) is adapted.
5. a kind of varying pitch dry screw vacuum pump according to claim 1, it is characterised in that: the driving screw rod (12)
Engage and connect with driven screw (15), between the outer surface left side flood dragon of the driving screw rod (12) and driven screw (15) between
Away from the spacing being greater than between the flood dragon of right side.
6. a kind of varying pitch dry screw vacuum pump according to claim 1, it is characterised in that: two cooling chambers
(4) mutually close side is fixedly installed with bushing (17), and the quantity of the bushing (17) is two, and two bushings (17) are closed
Central symmetry in the pump housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822155086.1U CN209724664U (en) | 2018-12-21 | 2018-12-21 | A kind of varying pitch dry screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822155086.1U CN209724664U (en) | 2018-12-21 | 2018-12-21 | A kind of varying pitch dry screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209724664U true CN209724664U (en) | 2019-12-03 |
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ID=68677442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822155086.1U Active CN209724664U (en) | 2018-12-21 | 2018-12-21 | A kind of varying pitch dry screw vacuum pump |
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| CN (1) | CN209724664U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577598A (en) * | 2020-05-12 | 2020-08-25 | 山东凯恩真空技术有限公司 | Screw vacuum pump noise reduction device |
-
2018
- 2018-12-21 CN CN201822155086.1U patent/CN209724664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577598A (en) * | 2020-05-12 | 2020-08-25 | 山东凯恩真空技术有限公司 | Screw vacuum pump noise reduction device |
| CN111577598B (en) * | 2020-05-12 | 2021-11-30 | 山东凯恩真空技术有限公司 | Screw vacuum pump noise reduction device |
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