CN105041686A - Turbine type vacuum pump and automatic variable pumping speed vacuum obtaining device with pump - Google Patents
Turbine type vacuum pump and automatic variable pumping speed vacuum obtaining device with pump Download PDFInfo
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- CN105041686A CN105041686A CN201510369976.0A CN201510369976A CN105041686A CN 105041686 A CN105041686 A CN 105041686A CN 201510369976 A CN201510369976 A CN 201510369976A CN 105041686 A CN105041686 A CN 105041686A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a vacuum pump and provides a turbine type vacuum pump which is simple in structure and capable of regulating pump speed in good, effectively exhausting evaporative gas in a vacuum system, saving energy and reducing consumption as well as an automatic variable pumping speed vacuum obtaining device with the pump. The technical problems that pumping speed of medium and low vacuum equipment is fixed, energy is wasted as pumping speed is high during exhausting of evaporative gas in the vacuum system or vacuum degree of the system cannot meet requirements as pumping speed is relatively low, and the like, in the prior art are solved. The turbine type vacuum pump comprises a variable-frequency motor, wherein the output shaft end of the variable-frequency motor is in butt joint with a pump housing; a gas inlet is formed in the front end surface of the pump housing opposite to the output shaft of the variable-frequency motor; a gas outlet is formed in the ring-shaped surface of the pump housing; the output shaft of the variable-frequency motor extends into the pump housing; and a radial sine reducing impeller is arranged on the corresponding output shaft in the pump housing in a sleeving mode.
Description
Technical field
The present invention relates to a kind of vacuum pump, particularly relate to one can adjust pumping speed in good time, and be conducive to getting rid of the turbo type vacuum pump of vapo(u)rability gas in vacuum system and the automatic change pumping speed vacuum acquirement device with this pump.
Background technique
Vacuum pump is the device utilizing the methods such as machinery, physics, chemistry or physical chemistry to produce, improve and maintain vacuum in a certain enclosed space, it is widely used in the fields such as medication chemistry, electronic technology, vacuum drying, refrigeration, generally be divided into reciprocating vacuum pump, rotary-vane vaccum pump and molecular pump etc., rotary-vane vaccum pump is wherein especially extensive as backing pump application.Well-known in the using process of vacuum pump, along with the change of temperature, vacuum state in manufacturing process, the vapo(u)rability gas flow produced in vacuum system also can increase thereupon, the vacuum pump maintaining vacuum environment needs the exhaust capacity adapted with it, the change with degree of vacuum change of this exhaust capacity, degree of vacuum improves, and the pumping speed of the vacuum pump that vacuum system configures also needs to strengthen thereupon.Particularly at timber, medicinal material, vacuum drying in the manufacturing processes such as food, when running vacuum drying process, vapo(u)rability medium in medium can with the decline of processing environment pressure, produce a large amount of vapo(u)rability gas, and vapo(u)rability gas flow changes with pressure, therefore in order to improve system vacuum, when carrying out above-mentioned operation, people can only select the vacuum pump of larger pumping speed to meet the requirement of process system to degree of vacuum, but owing to there is sliding friction between the blade of rotary-vane vaccum pump and pump chamber, if significantly improve the rotating speed of sliding vane rotary pump, frictional force between blade and pump chamber also increases thereupon, temperature rise increases, pump chamber is caused to reduce the working life of vacuum pump because of wearing and tearing, also the waste of energy consumption is caused when pumping speed is larger simultaneously, therefore when selecting vacuum pumping speed, change due to temperature and pressure inevitably also exists or causes the waste of energy consumption because pumping speed selects comparatively greatly, or cause because pumping speed selects less the technical problem that system vacuum cannot meet the demands.
Summary of the invention
It is simple that the present invention mainly provides a kind of structure, pumping speed can be adjusted in good time, and the vapo(u)rability gas effectively got rid of in vacuum system, energy-saving and cost-reducing turbo type vacuum pump and the automatic change pumping speed vacuum acquirement device with this pump, solve in existing in prior art, rough vacuum equipment pumping speed fixes, when getting rid of the vapo(u)rability gas in vacuum system, or cause the waste of energy consumption because pumping speed selects comparatively large, or select less and technical problem that is that cause that system vacuum cannot meet the demands etc. because pumping speed.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of turbo type vacuum pump, comprise variable-frequency motor, at the output shaft end of described variable-frequency motor to being connected to pump case, the pump case front-end face relative with output shaft is provided with suction port, the ring surface of pump case is provided with relief opening, the output shaft of variable-frequency motor extends in pump case, and output shaft corresponding in pump case is set with radial sinusoidal reducing impeller.Output shaft corresponding in pump case is set with radial sinusoidal reducing impeller and namely forms turbo type vacuum pump, namely by the rotation of radial sinusoidal reducing impeller from the suction port air-breathing of docking with vacuum system, the relief opening arranged from radial direction again gets rid of gas, because the radial sinusoidal reducing impeller of whole suction and discharge process does not contact with pump case, therefore when the vapo(u)rability gas in system is more or when the air displacement of vacuum system is suitable with discharge quantity, when degree of vacuum maintains certain numerical value, namely the pumping speed of vacuum pump is improved by the speedup of variable-frequency motor, now vapo(u)rability gas is able to quick discharge, breach all drawbacks in traditional rotary-vane vaccum pump structure, system vacuum is steadily improved, thus stabilize the production procedure of product, structure is simple, and achieve energy-saving and cost-reducing object.
As preferably, described radial direction sinusoidal reducing impeller comprises same axle key and is connected to hollow shaft on output shaft, is set with annular bottom plate in corresponding with variable-frequency motor hollow shaft end, between the outer ring surface of annular bottom plate and hollow shaft, be provided with some blades.Form turbine structure by hollow shaft, annular bottom plate and blade, the exhaust of axial air-breathing radial direction, vacuum operation scope is wide, can be used for the operating environment that the hygienic requirements such as vapo(u)rability gas content is higher or food materials are packed, drying are higher.
As more preferably, described cover plate is spun on the outer ring surface of hollow shaft, and the outer side of blade is along in awave sinusoidal shape, and the circumcircle of blade to be tapered off distribution to the other end by one end hollow shaft corresponding to annular bottom plate.Spiral on the outer ring surface of hollow shaft, one end height towards suction port successively decreases and is the blade of sinusoidal distribution, the spiral chute formed from the miner diameter end of the sinusoidal reducing impeller of radial direction along blade from the gas of suction port rises, during the rotation of radial sinusoidal reducing impeller, along with the increase gradually of diameter, the centrifugal force that gas in spiral chute obtains is increasing, when gas moves to relief opening, the relief opening that gas is disposed radially under centrifugal action is discharged smoothly, blade radial size is changed from small to big, be conducive to the centrifugal force increasing gas molecule, and a chamber can be formed during the blade rotation of sine wave shape, by the rotary motion of the sinusoidal reducing impeller of radial direction, rotating power is passed to gas, gas is made to obtain increasing centrifugal force, finally realize high efficiency exhaust.
As more preferably, the ratio of described blade miner diameter end circumcircle and blade bigger diameter end circumcircle is 1:1.5 to 1:2.5.When the bigger diameter end of blade and miner diameter end circumcircle size meet rational ratio, be conducive to the centrifugal force increasing gas molecule, improve the venting capacity of vacuum pump.
As more preferably, the angle of described blade bigger diameter end and hollow shaft axis is: 10 ° to 45 °, and the angle of blade miner diameter end and hollow shaft axis is: 50 ° to 80 °.When the bigger diameter end of blade and miner diameter end and hollow shaft axis keep rational angle, one is be conducive to low voltage difference air-flow to enter suction port, and two is the gas backflows being conducive to reducing exhaust end, improves the suction of vacuum pump, venting capacity.
As preferably, the output shaft of described variable-frequency motor is rotatably connected on the bearing support of motor casing by magnetic suspension bearing.Magnetic suspension bearing ensure that stability and the reliability of vacuum pump high speed operation.
A kind of automatic change pumping speed vacuum acquirement device with turbo type vacuum pump, to then vacuum system on described suction port (3), vacuum system is provided with pressure gauge, pressure gauge electrically connect PLC control system, PLC control system electrically connect variable-frequency motor, and PLC control system is according to the rotating speed of manometric Pressure testing information auto-adjustment control variable-frequency motor.Adopt the turbo type vacuum pump of converter technique can melt as unified control system with the vacuum technology flow process producing vapo(u)rability gas by PLD control technique, according to vacuum technology flow process, by automatically gathering the external pressure of vacuum system, instruction variable-frequency motor adjustment rotating speed, make its vacuum pump have the function automatically becoming pumping speed, namely adjust the pumping speed of turbo type vacuum pump in good time automatically, make it the discharge capacity adapting to vapo(u)rability gas, the production procedure of stable prod, realizes energy-saving and cost-reducing.
Therefore, a kind of turbo type vacuum pump of the present invention and there is following advantage with the automatic change pumping speed vacuum acquirement device of this turbo type vacuum pump: the vacuum system boil-off gas scale of construction is with the change of degree of vacuum, vacuum pumping speed carries out applicability change thereupon, vapo(u)rability medium in operation medium can with the decline of processing environment pressure, produce a large amount of vapo(u)rability gas, and vapo(u)rability gas flow changes with pressure, there is the automatic change pumping speed vacuum acquirement device automatically becoming pumping speed function both solved in rough vacuum in this state, pumping speed is high joins caused energy consumption waste, also the vacuum state instability that the pumping speed deficiency under high vacuum state causes is solved, energy-saving and cost-reducing.
Accompanying drawing illustrates:
Fig. 1 is the automatic change pumping speed vacuum acquirement device of the present invention with turbo type vacuum pump;
Fig. 2 is the enlarged view of radial sinusoidal reducing impeller shown in Fig. 1.
Embodiment:
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of turbo type vacuum pump of the present invention, comprise variable-frequency motor 1, the output shaft 11 of variable-frequency motor 1 is rotatably connected on the bearing support of motor casing by magnetic suspension bearing 9, variable-frequency motor 1 corresponds to one end of output shaft 11 to then pump case 2, output shaft 11 extends in pump case 2 through pump case 2, with suction port 3 in the middle part of pump case 2 front-end face relative with output shaft 11, with relief opening 5 above the ring surface of pump case 2, on output shaft 11 corresponding in pump case 2, cover is filled with a sinusoidal reducing impeller of radial direction, as shown in Figure 2, radial sinusoidal reducing impeller comprises same axle key and is connected to hollow shaft 41 on output shaft 11, be set with in corresponding with the variable-frequency motor 1 side coaxial interworking in hollow shaft 41 end and be fixed wtih one piece of annular bottom plate 42, uniform eight blades 43 between the outer ring surface of annular bottom plate 42 and hollow shaft 41, its hollow mandrel 41, annular bottom plate 42 with blade 43 for integral type is connected, blade 43 spirals on the outer ring surface of hollow shaft 41, the inner side end of blade 43 is connected on annular bottom plate 42, the outer side of blade 43 is along being awave sinusoidal shape, and it is large corresponding to blade 43 circumcircle that blade 43 circumscribed circle diameter of annular bottom plate 42 one end is more corresponding than hollow shaft 41 the other end, the ratio of miner diameter end circumcircle and bigger diameter end circumcircle is 1:2, greatly, circumcircle between miner diameter end is that continuous print successively decreases distribution, the angle of blade 43 bigger diameter end and hollow shaft 41 axis is 30 ° simultaneously, the angle of blade 43 miner diameter end and hollow shaft 41 axis is 65 °.
Embodiment 2:
A kind of automatic change pumping speed vacuum acquirement device with above-mentioned turbo type vacuum pump, as shown in Figure 1, to then vacuum system 6 on suction port 3, vacuum system 6 is provided with pressure gauge 7, pressure gauge 7 electrically connect PLC control system 8, PLC control system 8 electrically connect variable-frequency motor 1, and PLC control system 8 is according to the rotating speed of the Pressure testing information auto-adjustment control variable-frequency motor 1 of pressure gauge 7, and remaining part is identical with embodiment 1.
Specific embodiment described herein is only to design of the present invention explanation for example.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (7)
1. a turbo type vacuum pump, comprise variable-frequency motor (1), it is characterized in that: output shaft (11) end in described variable-frequency motor (1) is to being connected to pump case (2), pump case (2) front-end face relative with output shaft (11) is provided with suction port (3), the ring surface of pump case (2) is provided with relief opening (5), the output shaft (11) of variable-frequency motor (1) extends in pump case (2), and output shaft (11) corresponding in pump case (2) is set with radial sinusoidal reducing impeller.
2. turbo type vacuum pump according to claim 1, it is characterized in that: described radial direction sinusoidal reducing impeller comprises same axle key and is connected to hollow shaft (41) on output shaft (11), in hollow shaft (41) end sleeve corresponding with variable-frequency motor (1), annular bottom plate (42) is housed, between the outer ring surface of annular bottom plate (42) and hollow shaft (41), is provided with some blades (43).
3. turbo type vacuum pump according to claim 2, it is characterized in that: described blade (43) spirals on the outer ring surface of hollow shaft (41), and the outer side of blade (43) is along in awave sinusoidal shape, the circumcircle of blade (43) to be tapered off distribution to the other end by the upper one end corresponding to annular bottom plate (42) of hollow shaft (41).
4. turbo type vacuum pump according to claim 3, is characterized in that: the ratio of described blade (43) miner diameter end circumcircle and blade (43) bigger diameter end circumcircle is 1:1.5 to 1:2.5.
5. turbo type vacuum pump according to claim 2, it is characterized in that: the angle of described blade (43) bigger diameter end and hollow shaft (41) axis is: 10 ° to 45 °, the angle of blade (43) miner diameter end and hollow shaft (41) axis is: 50 ° to 80 °.
6. turbo type vacuum pump as claimed in any of claims 1 to 5, is characterized in that: the output shaft (11) of described variable-frequency motor (1) is rotatably connected on the bearing support of motor casing by magnetic suspension bearing (9).
7. the automatic change pumping speed vacuum acquirement device with turbo type vacuum pump described in claim 1, it is characterized in that: to then vacuum system (6) on described suction port (3), vacuum system (6) is provided with pressure gauge (7), pressure gauge (7) electrically connect PLC control system (8), PLC control system (8) electrically connect variable-frequency motor (1), and PLC control system (8) is according to the rotating speed of Pressure testing information auto-adjustment control variable-frequency motor (1) of pressure gauge (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369976.0A CN105041686A (en) | 2015-06-30 | 2015-06-30 | Turbine type vacuum pump and automatic variable pumping speed vacuum obtaining device with pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369976.0A CN105041686A (en) | 2015-06-30 | 2015-06-30 | Turbine type vacuum pump and automatic variable pumping speed vacuum obtaining device with pump |
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| CN105041686A true CN105041686A (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510369976.0A Pending CN105041686A (en) | 2015-06-30 | 2015-06-30 | Turbine type vacuum pump and automatic variable pumping speed vacuum obtaining device with pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673526A (en) * | 2016-04-07 | 2016-06-15 | 上海华力微电子有限公司 | Molecular pump and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202153999U (en) * | 2011-07-28 | 2012-03-07 | 鲜八里集团有限公司 | Vacuum degassing tank for food processing |
| CN104040185A (en) * | 2012-01-23 | 2014-09-10 | 株式会社Ihi | Centrifugal compressor |
| CN104564717A (en) * | 2014-11-27 | 2015-04-29 | 杭州萧山美特轻工机械有限公司 | Direct driven high-speed turbine vacuum pump and operation method thereof |
-
2015
- 2015-06-30 CN CN201510369976.0A patent/CN105041686A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202153999U (en) * | 2011-07-28 | 2012-03-07 | 鲜八里集团有限公司 | Vacuum degassing tank for food processing |
| CN104040185A (en) * | 2012-01-23 | 2014-09-10 | 株式会社Ihi | Centrifugal compressor |
| CN104564717A (en) * | 2014-11-27 | 2015-04-29 | 杭州萧山美特轻工机械有限公司 | Direct driven high-speed turbine vacuum pump and operation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673526A (en) * | 2016-04-07 | 2016-06-15 | 上海华力微电子有限公司 | Molecular pump and control method thereof |
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Application publication date: 20151111 |