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 revers

Method used

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

Examples

Experimental program
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Effect test

Example Embodiment

[0014] Example 1

[0015] figure 1 The shown semi-open impeller supercharging structure is composed of a back plate 1, a blade 2, a balance hole 3 and a 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 that is slanted backward in the reverse rotation direction is evenly distributed on the outer end surface, and the front concave side of the blade 2 is the working surface. The back side is the back side. In this embodiment, the diameter of the impeller is Φ70mm, and the top surface of the blade 2 is as follows: image 3 As shown, it is conical, its cone angle θ=154°±3′, and the top surface of blade 2 is conical, which directly increases the width of the blade near the suction port, which can improve the suction capacity of the impeller. The outlet angle of the one-way arc curved body blade 2 with the backward design is as follows: figure 1 All shown are β 2 =90°, and the included angle between the i...

Example Embodiment

[0016] Example 2

[0017] The present invention adjusts the design of the blades 2 in the impeller according to the specifications of the matched cooling water pump. In this embodiment, the diameter of the impeller is Φ100mm. First, it is evenly distributed on the outer end face of the back plate 1 as follows: figure 2 As shown in the blade 2, the blade 2 is a bidirectional arc-shaped curved body that is tilted backward in the reverse rotation direction, and the inner half and the outer half of the blade 2 are curved in opposite directions. Due to the change in shape and length of the blade 2, the ability to transport water has been improved, so the outlet angle β of the blade 2 is adjusted. 2 = 70°, the cone angle θ of the top surface of the blade 2 is 130°, the angle between the inner edges of the exits of the adjacent blades 2 on the outer circle of the impeller is α = 60°, and the rest of the auxiliary parameters remain unchanged. The application effect of the impeller ...

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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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