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Two-stage and two-discharge graphite pump

A graphite and pump body technology, applied in the field of double-stage double-discharge graphite pumps, can solve the problems of difficult mechanical properties of impregnated graphite, and achieve the effects of ensuring safe and reliable long-term operation, avoiding damage to the impeller, and satisfying hydraulic performance

Inactive Publication Date: 2012-10-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to improve the mechanical properties of impregnated graphite

Method used

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  • Two-stage and two-discharge graphite pump
  • Two-stage and two-discharge graphite pump
  • Two-stage and two-discharge graphite pump

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, the present invention is further described:

[0051] exist figure 1 Among them, the dual-stage dual-discharge graphite pump of the present invention comprises a pump cover (35), a pump body, an impeller, a bracket (20) and a rotating shaft. The pump body is divided into a front pump body (34), a middle pump body (4) and a rear pump body (5). The rotating shaft is formed by connecting the long shaft (12) and the short shaft (31). The pump adopts two-stage impellers, which are the first-stage impeller (28) and the second-stage impeller (24). The pressurized water chamber where the secondary impeller (24) is located adopts a symmetrical double discharge structure, and the pressurized water chamber is symmetrically distributed in a spiral shape. The flow parts in the pump that are in contact with the medium are all made of graphite.

[0052] The motor (17) and the bracket (20) are mounted on the base (18), and the motor s...

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Abstract

The invention provides a two-stage and two-discharge graphite pump capable of preventing an impeller from being damaged. All flow passage components contacted with a medium in a pump are made of graphite; an electric motor transmits power to the impeller through a shaft joint, a long shaft,and a short shaft; the pump comprises a pump cover, a pump body, the impeller, a bracket and a rotary shaft; the pump adopts two-stage impellers which are a first-stage impeller and a second-stage impeller; the first-stage impeller and the second-stage impeller are orderly limited and installed on the same one rotary shaft; positive and opposite guide vanes are mounted between the two-stage impellers, and a pumping chamber of the second-stage impeller adopts a symmetrical two-discharge structure. After adopting the two-stage impeller, the torsion and the centrifugal force impacted on one stage of impeller are less than the torsion and the centrifugal force when the single-grade impeller is adopted under the condition of reaching the same lift and the flow rate; and after adopting the pumping chamber of the two-discharge symmetrical structure, the radial force of the impeller caused by the fluid can counteract mutually, so that the damage of the impellers can be prevented.

Description

[0001] technical field [0002] The invention relates to a graphite pump, in particular to a double-stage double-discharge graphite pump, which is mainly used for conveying corrosive medium. Background technique [0003] Graphite pump is a kind of corrosion-resistant pump. All the flow parts in the pump that are in contact with the medium are made of graphite. Graphite pumps are widely used in the transportation of corrosive media, from the perspective of industrial production, including chemical, pesticide, metallurgy, chemical fiber, medicine, light industry and environmental protection. The temperature used is mostly between 40 and 50 °C. Because graphite has good thermal shock resistance, it will not crack under sudden cooling and sudden heating, and it can reach 220 °C in special cases. The flow rate of graphite pump is 3~200m 3 / h, the head is 10 ~ 65m. The graphite pump for chemical industry is generally a centrifugal pump. The impeller, volute chamber, shaft seal ...

Claims

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Application Information

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IPC IPC(8): F04D1/06F04D29/22F04D29/02
Inventor 邵春雷顾伯勤周剑锋黄星路程文洁
Owner NANJING UNIV OF TECH
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