Closed test device for NPSH of submersible pump

A technology of closed-type and test device for NPSH, applied in the field of fluid machinery, can solve the problem that the total suction head cannot be measured, the measurement method of the NPSH of the submersible pump is not specifically provided, and the test method of the cavitation performance of the submersible pump is not provided, etc. problem, to achieve the effect that the solution cannot be carried out

Active Publication Date: 2014-05-28
JIANGSU UNIV
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the submersible pump has no suction pipe, the total suction head cannot be measured, and the standard does not provide a specific measurement method for the NPSH of the submersible pump
Another standa

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Closed test device for NPSH of submersible pump
  • Closed test device for NPSH of submersible pump
  • Closed test device for NPSH of submersible pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] see figure 1 , submersible pump NPSH closed-type test device consists of cavitation tank 1, outlet 2, inlet valve 3, non-centric diffusion pipe 4, suction pipe 5, submersible pump 6, thermometer 7, inlet pressure gauge 8, transition pipe 9 , sealing joint one 10, speed measuring instrument 11, outlet pressure gauge 12, drain pipe 13, outlet pressure measuring tube 14, sealing joint two 15, flow meter upstream straight pipe section 16, inlet pressure measuring tube 17, speed sensor 18, flow meter 19. The straight pipe section 20 downstream of the flow meter, the flow regulating valve 21, the water injection valve 22, the vacuum pump 23, the drain valve 24, the air extraction pipe 25, the separator 27, the liquid level gauge 28, the air extraction valve 29, and the exhaust valve 30. One end of the inlet valve 3 is flanged to the outlet 2, and the other end is flanged to the heterocentric diffusion pipe 4. The diffusion end of the heterocentric diffusion pipe 4 is welded t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of fluid machinery, and particularly relates to a closed test device for the NPSH of a water-filling type submersible pump and a submersible pump for a well. The test device is composed of a cavitation tank, an inlet valve, a non-concentric diffusion tube, a suction tube, a submersible pump, a temperature meter, an inlet pressure gauge, a transition tube, a first seal joint, a revolution speed measurement instrument, an outlet pressure gauge, a water drainage tube, an outlet pressure measurement tube, a second seal joint, a flow meter upstream straight tube segment, an inlet pressure measurement tube, a revolution speed transducer, a flow meter, a flow meter downstream straight tube segment, a flow control valve, a water injection valve, a vacuum pump, a drainage valve, an exhaust tube, a partition plate, a liquid level meter, an extraction valve and a vent valve. The temperature meter, the inlet pressure gauge, the outlet pressure gauge, the revolution speed transducer, the revolution speed measurement instrument and the flow meter are used for measuring key parameters of the NPSH of the submersible pump. The test device has the advantages that the critical NPSH of the submersible pump under the conditions of different flows can be measured through the test device for the NPSH of the submersible pump, and the problem that a cavitation performance test of the submersible pump cannot be carried out is solved.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and relates to a hydraulic performance test of a submersible pump, in particular to a closed test device capable of measuring the NPSH of a water-filled submersible pump and a well submersible pump. Background technique [0002] A submersible pump is a general-purpose machine widely used in industry, agriculture, and various engineering fields. Its structure is that the submersible motor and the water pump share a shaft. Unlike general land water pumps, the submersible pump has no suction pipe. [0003] The hydraulic performance index of the pump usually includes flow, head, shaft power, efficiency and NPSH, and NPSH is an indirect measurement, which must be calculated from the data of pump inlet pressure head, vaporization pressure head and other data. A large amount of data proves that cavitation damage is the direct culprit of water pump failure. Like other water pumps, submersible pumps often ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F04B51/00
Inventor 汤玲迪汤跃袁寿其陈超张晨骏
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap