CN201771843U

CN201771843U - Novel short blade impeller of constant-pressure tangent pump

Info

Publication number: CN201771843U
Application number: CN2010202512232U
Authority: CN
Inventors: 张培富; 张锡淼
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2010-07-07
Filing date: 2010-07-07
Publication date: 2011-03-23
Anticipated expiration: 2020-07-07

Abstract

The utility model relates to a novel short blade impeller of a constant-pressure tangent pump, comprising a plurality of blades, a front cover plate and a rear cover plate. The novel short blade impeller of the constant-pressure tangent pump is characterized in that the front cover plate and the rear cover plate are connected by the blades; and each of the blades comprises a bent blade at the front half part and a straight blade at the rear end. The novel short blade impeller of the constant-pressure tangent pump has the advantages of no fluid leakage at the position of a gap delta 1 as the impeller is provided with the front cover plate which is integrally connected with the blades; less volume leakage is formed and the efficiency is improved at certain extent as a gap delta 2 between the impeller and a pump cover can be adjusted to a less value; as the bent blades at the front half parts and the straight blades at the rear ends of the impeller substitute the original totally-straight blades, the flow passage of the blades is lengthened and the flow velocity of fluid changes slowly so that the energy loss of fluid is smaller and the efficiency is higher; and as the novel impeller has no gap delta 1, difficult control of the assembly size does not exist, thereby lowering assembly difficulty and effectively reducing the assembly cost.

Description

A kind of novel short blade constant voltage tangent pump impeller

Technical field

The utility model relates to a kind of a kind of new structure pattern of short blade constant voltage tangent pump impeller.

Background technique

For traditional short blade constant voltage tangent pump impeller, what generally adopt is the full-open type impeller (back shroud 11, blade 12, pump cover 13 as shown in Figure 1) that there is back shroud at the blade position.When the big lift of the flow of pump was low, the blade of impeller will be very short, adopts the full-open type impeller to form very big leakage in gap delta 1 and δ 2 places in such cases, thereby cause the efficient of pump lower, energy loss is excessive.In addition,, require to have less δ 1 to reduce and reveal loss, also just caused the difficulty of fit on to increase, should not control, thereby increased assembly cost for unshrouded impeller.Therefore demand improving the structure of short blade constant voltage tangent pump impeller urgently.

Summary of the invention:

The purpose of this utility model is that what to solve that short blade constant voltage tangent pump impeller adopts in the prior art is existing the problems referred to above of full-open type impeller that there is back shroud at the blade position, and a kind of novel short blade constant voltage tangent pump impeller is provided.The utility model designs a kind of novel short blade constant voltage tangent pump impeller, comprises some blades, front shroud and back shroud, it is characterized in that: linked to each other by blade between front shroud and the back shroud, blade is made of the curved vane of first half and the prismatic blade of rear end.The utility model has the advantages that impeller has front shroud, front shroud and blade are connected as a single entity, thereby do not have gap delta 1, have not also just had the escape of liquid at gap delta 1 place, and loss is less.Gap delta 2 between impeller and the pump cover can be adjusted to less degree, leaks thereby form less volume, and efficient has also just obtained raising to a certain degree.Impeller replaces original complete prismatic blade by the curved vane of front half part and the prismatic blade of rear end, and the runner of blade is elongated, and flow rate of fluid changes more slow, thereby the energy loss of fluid is less, and efficient is higher.Because there is not gap delta 1 in new impeller, also be difficult to control, thereby assembling difficulty reduces with regard to the size that has not had fit on, assembly cost is effectively reduced.

Description of drawings:

Fig. 1 is the prior art constructions schematic representation, and Fig. 2 is the AA generalized section of Fig. 1,

Fig. 3 is a structural representation of the present utility model, and Fig. 4 is the BB generalized section of Fig. 3,

Below in conjunction with accompanying drawing and construction embodiment the utility model is made detailed operation instruction.

Embodiment:

A kind of novel short blade constant voltage tangent pump impeller comprises some blades 1, front shroud 2 and back shroud 3 among the figure, it is characterized in that: linked to each other by blade between front shroud and the back shroud, blade is made of the curved vane of first half and the prismatic blade of rear end.

Impeller has front shroud, and front shroud and blade are connected as a single entity, thereby does not have gap delta 1, has not also just had the escape of liquid at gap delta 1 place, and loss is less.Gap delta 2 between impeller and the pump cover 4 can be adjusted to less degree, leaks thereby form less volume, and efficient has also just obtained raising to a certain degree.Impeller replaces original complete prismatic blade by the curved vane of front half part and the prismatic blade of rear end, and the runner of blade is elongated, and flow rate of fluid changes more slow, thereby the energy loss of fluid is less, and efficient is higher.Because there is not gap delta 1 in new impeller, also be difficult to control, thereby assembling difficulty reduces with regard to the size that has not had fit on, assembly cost is effectively reduced.

Claims

1. a novel short blade constant voltage tangent pump impeller comprises some blades, front shroud and back shroud, it is characterized in that: linked to each other by blade between front shroud and the back shroud, blade is made of the curved vane of first half and the prismatic blade of rear end.