Cantilever type high rate turbine vacuum pump and its evacuation method

A cantilever and vacuum pump technology, applied in non-variable-capacity pumps, non-displacement pumps, pumps, etc., can solve the problems of difficult to achieve high rotation speed and large volume, and achieve high mechanical efficiency, reduced energy consumption, and efficient extraction. Effect

Inactive Publication Date: 2009-04-15
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Based on the above ideas, German MAN company has specially designed and provided single-stage and multi-stage vacuum fans TURBAIR for the dehydration process according to the technological characteristics of paper mills. It uses closed centrifugal impellers to achieve vacuum extraction, and all impellers are connected in series. On a main shaft, it has a multi-stage turbine fan structure, and its speed is difficult to reach a high level, resulting in a relatively large volume

Method used

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  • Cantilever type high rate turbine vacuum pump and its evacuation method

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Embodiment 1

[0029] The cantilever type high-speed turbo vacuum pump of this embodiment has a detailed structure as shown in the accompanying drawings. It includes a gear speed-up box 9, two independent pump heads and a high-speed rotor. The gear speed-up box 9 adopts a single-stage speed-up, and the gear 12 The upper shaft is connected with the prime mover; the two independent pump heads are separated on both sides of the gear speed increaser box 9, and have a symmetrical structure. The independent pump head is a split structure, including the suction port 1, the inner body of the volute 5, and the stationary wheel cover of the impeller. 6. The volute 4 and the air seal 7, the suction port 1 and the impeller static wheel cover 6 are installed on the volute inner body 5 to form an integral body embedded in the volute 4, and the volute inner body 5 and the volute 4 cavity are combined to form an expansion The air seal 7 is installed on the side of the volute 4 through the flange; the high-sp...

Embodiment 2

[0037] The cantilever type high-speed turbo vacuum pump of this embodiment has a detailed structure as shown in the accompanying drawings. It includes a gear speed-up box 9, four independent pump heads and two high-speed rotors. The gear speed-up box 9 adopts a single-stage speed-up, The shaft on the gear 12 is connected to the prime mover; the four independent pump heads are separated on both sides of the gear speed increaser box 9, and the two on each side have a symmetrical structure. 5. The impeller stationary wheel cover 6, volute 4 and air seal 7, the suction port 1 and the impeller stationary wheel cover 6 are installed on the volute inner body 5 to form an integral body embedded in the volute 4, and the volute inner body 5 and the volute The combination of the 4 cavities forms the diffuser and the medium outflow channel, and the air seal 7 is installed on the side of the volute 4 through the flange; the high-speed rotor includes the gear shaft 10, the thrust plate 11, t...

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Abstract

The invention discloses a cantilever-type high-speed vacuum turbine pump and the vacuum pumping method. A high-speed eccentric impeller of 10000 revolutions per minute to 30000 revolutions per minute is used to realize the pumping of vacuum with minus 30kPa to minus 70kPa. The pump comprises a gear increase box, independent pump heads and a high-speed rotor. A large gear of the gear increase box is connected with a prime motor. Independent pump heads stand separately at both sides or a single side of the gear increase box. The pump heads adopt a split structure and comprise a suction inlet, an internal volute body, an impeller stopping cover, a volute shell and an air seal. The high-speed rotor comprises a high-speed gear shaft, a thrust collar, an impeller, and a fastening bolt, and is supported by a sliding bearing on the gear increase box. An impeller cantilever is arranged on the tail end of the high-speed gear shaft. The invention uses a high-speed turbine to realize the rapid vacuum pumping with a large flow. Moreover, a multi-pump head structure can make a single pump realize the multi-position, multi-vacuum degree and simultaneous pumping in the fields of paper making, chlor-alkali chemical industry, and so on and greatly reduce the vacuum system energy consumption. Meanwhile, the pump is provided with the advantage that the pump is concise in the structure, highly reliable, widely applicable, and environment-friendly, and does not need a liquid working ring, and so on.

Description

technical field [0001] The invention relates to a vacuum pump, more specifically a cantilever type high-speed turbo vacuum pump and a vacuum pumping method thereof, which belong to the technical field of vacuum equipment and turbo machinery. Background technique [0002] Vacuum pumps usually form a vacuum system with other equipment, and are widely used in petroleum, chemical, machinery, mining, light industry, medicine, food, electronics, metallurgy, aerospace and other departments. Traditional vacuum pump products that are widely used mainly include liquid ring vacuum pumps, reciprocating Type vacuum pump, Roots vacuum pump and rotary vane vacuum pump, etc. [0003] Among them, the liquid ring vacuum pump is a rough vacuum pump and can also be used as a compressor. It is widely used in industrial production processes such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing. app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D17/10F04D25/02F04D29/42F04D29/44F04D29/28F04D29/056F04D29/30
Inventor 吴大转温建新王乐勤
Owner ZHEJIANG UNIV
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