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Impact Turbine Nozzles

A hydraulic turbine and impact technology, which is applied in the direction of impact engines, hydroelectric power generation, mechanical equipment, etc., can solve problems such as unstable jet flow, difficult maintenance and replacement, and decreased output efficiency of the unit

Active Publication Date: 2017-08-15
JIANGSU XIMEI IRRIGATION & DRAINAGE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing water turbine nozzle needles are mainly based on the 45~67° scheme. The nozzle needle contact surface is 2~3mm, and there is no stable flow state. The needle is damaged, resulting in unstable jet flow and reduced unit output efficiency, accompanied by common faults such as runner water throwing and bearing water ingress.
And most of the nozzles are built-in, so it is very difficult to maintain and replace

Method used

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  • Impact Turbine Nozzles

Examples

Experimental program
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Effect test

Embodiment

[0015] Example: refer to figure 1 , an impact turbine nozzle, including a nozzle body and a spray needle 9 installed in the nozzle. The nozzle adopts an external mounting type, including a nozzle seat 1 and a nozzle 6, and a bolt hole 4 is designed on the outside of the nozzle seat 1, and the nozzle 6 is externally mounted on the nozzle seat 1 through bolts. The front end of the nozzle 6 is provided with a flow stabilization section. The flow stabilization section includes an outer stabilization section 8 and an inner stabilization section 7. The length of the outer stabilization section 8 is 10 mm; It is adaptable, with the same slope, and it is also the water stop surface in the closed state. The setting of the double flow state stability section ensures the strength of the nozzle opening and the stability of the flow state. The length of the water stop surface is 10~20mm to ensure the water stop effect. The water contact surface of the nozzle 6 is made of stainless steel ...

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Abstract

The invention discloses an impact type water turbine nozzle. The impact type water turbine nozzle comprises a nozzle body and a spray needle. The taper angle of a needle tip of the spray needle ranges from 36 to 38 degrees. The optimal taper angle of the needle tip is 37 degrees. The impact type or inclined water turbine nozzle has following beneficial effects: service lifetime is obviously prolonged by 2 to 3 times as compared with an original spray nozzle; jet flow is centralized; output of a power unit is stable; efficiency is increased by about five to 10 percents; especially in the non-full load state, effects are exerted significantly; maintenance and detachment are conveniently performed; maintenance duration of the spray needle and the nozzle is greatly shortened; and benefit of a power station is increased.

Description

technical field [0001] The invention relates to the field of hydroelectric machinery, in particular to an impact water turbine nozzle. Background technique [0002] my country is a country rich in water resources. As an energy conversion equipment for utilizing water resources, hydraulic turbines are mainly divided into two types, one is the impact turbine and the other is the impact turbine. For Pelton turbines, the working performance of the nozzle is of great significance to the turbine, and the working performance of the nozzle is determined by the shape of the nozzle. Existing water turbine nozzle needles are mainly based on the 45~67° scheme. The nozzle needle contact surface is 2~3mm, and there is no stable flow state. The needle is damaged, which leads to unstable jet flow and a decrease in unit output efficiency. At the same time, common faults such as runner water throwing and bearing water ingress occur. And most of the nozzles are built-in, so it is very diffi...

Claims

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Application Information

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IPC IPC(8): F03B1/04
CPCY02E10/20
Inventor 肖炳生
Owner JIANGSU XIMEI IRRIGATION & DRAINAGE EQUIP CO LTD
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