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Vertical centrifugal pump with air dynamic pressure bearings

An air dynamic pressure bearing and vertical centrifugal technology, which is applied to non-variable pumps, parts of pumping devices for elastic fluids, pumps, etc., can solve the difficulty of vertical centrifugal pump maintenance and oil level control Narrow range, bearing wear and other problems, to achieve the effect of low power consumption, reduced maintenance, and long life

Pending Publication Date: 2018-11-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of existing vertical centrifugal pumps, when running at high speed, the oil level height control range for thrust bearing lubrication is narrow, and if the oil level is too low, the lubrication will be poor, so that lubrication failure often occurs, resulting in bearing wear. Pump maintenance is difficult

Method used

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  • Vertical centrifugal pump with air dynamic pressure bearings
  • Vertical centrifugal pump with air dynamic pressure bearings
  • Vertical centrifugal pump with air dynamic pressure bearings

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as Figure 1-4 As shown, a vertical centrifugal pump configured with an air dynamic pressure bearing includes a pump casing, an impeller 22, a mechanical seal, a shaft, and an air dynamic pressure bearing; wherein, the air dynamic pressure bearing includes an air dynamic pressure radial bearing 7 and two sets of Aerodynamic thrust bearings (the upper thrust bearing 13 and the lower thrust bearing 16, the two sets of aerodynamic thrust bearings have the same structure);

[0028] The pump casing includes a pump body 1, a pump cover 3, a bearing housing 6 and a bearing gland 12, the pump cover 3 is located in the bearing housing 6, the pump body 1 and the pump cover 3, the pump body 1 and the bearing housing 6, and the bearing housing 6 It is respectively connected with the bearing gland 12 by bolts; one side of the pump body 1 is provided with a pressure plug 2 and an exhaust valve 4, the exhaust valve 4 is located at the top of the side wall of the pump body 1, and ...

Embodiment 2

[0031] The structure of this embodiment is substantially the same as that of Embodiment 1, except that the diameters of the four journals are: journal I25journal IV11;

Embodiment 3

[0033] The structure of this embodiment is basically the same as that of Embodiment 1, except that the aerodynamic radial bearing is an elastic foil aerodynamic radial bearing, which includes a radial bearing top foil 7-5, a radial bearing wave Foil 7-3 and bearing seat 7-2, from outside to inside are the concentric rings formed by bearing seat 7-2, radial bearing wave foil 7-3 and radial bearing top layer foil 7-5, bearing seat 7- 2 is equipped with positioning pin Ⅲ7-1, and the elastic foil air dynamic pressure radial bearing is a full-circle 360° elastic foil air dynamic pressure radial bearing;

[0034]The aerodynamic pressure thrust bearing is an elastic foil aerodynamic pressure thrust bearing, including a bottom plate 13-2, a thrust bearing wave foil 13-3 and a thrust bearing top layer foil 13-4, and the bottom plate 13-2 is a circle ring shape, the thrust bearing wave foil 13-3 is evenly arranged on the bottom plate 13-2 along the circumferential direction, the thrust ...

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Abstract

The invention discloses a vertical centrifugal pump with air dynamic pressure bearings. The vertical centrifugal pump comprises a pump case, an impeller, a mechanical seal, a shaft and the air dynamicpressure bearings, wherein the air dynamic pressure bearings include the air dynamic radial bearing and the two air dynamic thrust bearings. The air dynamic pressure bearings are adopted to replace traditional oil-lubricated or grease-lubricated bearings. The air serves as a lubrication medium. A lubrication system is not needed. The vertical centrifugal pump is simple in structure and further has the advantages of being high in rotating speed and precision, clean, low in energy consumption and noise, long in period operation and the like.

Description

technical field [0001] The invention provides a vertical centrifugal pump equipped with an air dynamic pressure bearing, which belongs to the technical field of fluid machinery. Background technique [0002] Vertical centrifugal pumps are widely used in petrochemical, coal chemical, sewage treatment and other industries for nozzle pressurization, hot and cold water circulation, transportation of flammable and explosive liquids and corrosive liquids. Compared with the horizontal centrifugal pump, the structure of the vertical centrifugal pump is superimposed and connected from bottom to top, so the floor space is small and the construction investment is low. However, in the application of existing vertical centrifugal pumps, when running at high speed, the control range of oil level height for thrust bearing lubrication is narrow, and if the oil level is too low, the lubrication will be poor, so that lubrication failure often occurs, resulting in bearing wear Pump maintenanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/06F04D29/047F04D29/06F04D29/58
CPCF04D13/06F04D29/0473F04D29/061F04D29/586
Inventor 宋鹏云付朝波汲腾龙
Owner KUNMING UNIV OF SCI & TECH
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