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Semi-open impeller supercharge structure

A pressurized structure, semi-open technology, applied in non-variable pumps, engine cooling, liquid fuel engines, etc., can solve the problems of large water channel liquid resistance, increase the water outlet angle of impeller blades, etc., to improve water flow energy, increase the outlet angle, and improve the cooling effect

Inactive Publication Date: 2013-09-04
GAOYOU GAONONG MACHINERY FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the practical problem of large liquid resistance in the built-in water channel of the existing diesel engine, and proposes a semi-open impeller supercharging structure, which adopts the design of the backward blades in the reverse rotation direction. This improvement is an effective way to increase the water outlet angle of the impeller blades Technical measures, by appropriately increasing the head of the cooling water pump to compensate for the hydraulic loss caused by the large water resistance

Method used

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  • Semi-open impeller supercharge structure
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  • Semi-open impeller supercharge structure

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Embodiment 1

[0015] figure 1 The semi-open impeller supercharging structure shown is composed of back plate 1, blade 2, balance hole 3 and shaft hole 4. The back plate 1 in the impeller is a circular plate with a shaft hole 4 in the center, and a curved blade 2 is evenly distributed on the outer end surface according to the reverse rotation direction. The side of the blade 2 facing forward and concave is the working surface. The side that bulges backward is the back. In this embodiment, the diameter of the impeller is Φ70mm, and the top surface of the blade 2 is as image 3 It is conical as shown, and its cone angle θ=154°±3′. The top surface of the blade 2 adopts a conical shape, directly increasing the width of the blade near the suction port, which can improve the suction capacity of the impeller. The outlet angle of the blade 2 of the one-way arc surface body blade with backward design is as follows figure 1 All shown are β 2 =90°, the angle between the inner edges of the outlets o...

Embodiment 2

[0017] The present invention adjusts the design of the blades 2 in the impeller according to the specifications of the matching cooling water pump. In this embodiment, the diameter of the impeller is Φ100mm, first of all, it is evenly distributed on the outward end surface of the back plate 1 such as figure 2 The blade 2 shown is a two-way arc-shaped curved surface body that leans backward according to the reverse rotation direction, and the inner half and outer half of the blade 2 are reversely curved. Due to the shape change and lengthening of the blade 2, the ability to transport water is improved, so the outlet angle β of the blade 2 is adjusted 2 =70°, the cone angle θ=130° on the top surface of the blade 2, the angle between the inner edges of the outlets of the adjacent blades 2 on the outer circle of the impeller is α=60°, and the rest of the auxiliary parameters are unchanged. The impeller designed by adjusting the above parameters can achieve the application effect...

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Abstract

The invention discloses a semi-open impeller supercharge structure comprising a back plate, vanes, balance holes and a shaft hole. Curved-surface vanes tilting backwards in the counter-rotation direction are evenly distributed on the outward end of the back plate. One forwardly-recessed surface of each vane is an operating surface, and the other outwardly-projecting surface of each vane is a back surface. An outlet angle beta 2 of each vane is 70 degrees to 90 degrees. An included angle alpha between inner edges of outlets of adjacent vanes on the outer periphery of an impeller is 45 degrees to 60 degrees. The top surface of each vane is a surface tapered at angle theta of 130 degrees to 160 degrees. The backward elevation of each vane is increased to beta 2, the traditional backwardly-bent vanes of a cooling pump impeller are modified into backwardly-tilting bent vanes, the vane shape is modified, lift of a cooling pump compared with the prior art is increased by 7-10% under rated flow, the capacity of outgoing cooling water passing through a waterway is improved, and cooling effect of a diesel engine is directly improved.

Description

technical field [0001] The invention relates to a water pump impeller structure, in particular, the invention relates to a semi-open impeller supercharging structure matched with a centrifugal water pump. Background technique [0002] The cooling water pumps for general-purpose diesel engines are all centrifugal pumps. This type of pump that transports clean water nearby can easily meet the working conditions. As long as the hydraulic model is designed according to the conventional parameters, the flow rate, lift and shaft power can be matched under high efficiency conditions. . The core part of the hydraulic model of the centrifugal water pump is the impeller. The impellers of the existing commercial cooling water pumps are all semi-open structures, and the outlet angle β 2 Back-curved blades <90°. The semi-open impeller has a simple structure and is easy to manufacture. Theoretically speaking, the semi-open impeller can fully meet the cooling requirements of diesel en...

Claims

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Application Information

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IPC IPC(8): F04D29/24F01P5/10
Inventor 林文清杨立山
Owner GAOYOU GAONONG MACHINERY FITTINGS
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