CN2340953Y

CN2340953Y - Axial pump

Info

Publication number: CN2340953Y
Application number: CN 97245677
Authority: CN
Inventors: 刘剑魂
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-05
Filing date: 1997-10-05
Publication date: 1999-09-29
Anticipated expiration: 2007-10-05

Abstract

The utility model relates to an axial pump, comprising a machine base, a pump housing, a pump cover sleeve, a main shaft, a main shaft sleeve, a deflector, an impeller, a flower basket, etc. The impeller adopts tapered closed impeller, a water guide chamber is arranged between the impeller and the deflector, and the upper end and the lower end of the deflector are respectively provided with a streamline form water guide taper. The utility model can enlarge the liquid flow pressure at an impeller entrance, the liquid flow impact is reduced, the energy loss caused by vortex is reduced, and thereby, the work performance and the efficiency of the axial pump are improved, and the utility model is particularly suitable for irrigation with low lift and high flow rate.

Description

Axial-flow pump

The utility model belongs to a kind of agricultural or axial-flow pump that the aquaculture irrigation and drainage are used.

At present, the irrigation and drainage operation extensive use axial-flow pump of agricultural and culture fishery.The axial-flow pump of existing axial-flow pump, particularly low lift, big flow, traditional impeller design is difficult to obtain greater efficiency.CN2043679U discloses a kind of low lift, the axial flow pump structure of big flow, this axial-flow pump comprises motor, support, pump case, pump cover cover, main shaft, collar bush, fluid director, impeller and the gaily decorated basket etc., owing to adopt traditional straight-tube blade wheel structure, liquid stream directly enters diversion chamber by impeller, and its liquid flow impact and whirling motion cause bigger energy loss, thereby efficient is lower, and this pump structure integrity is relatively poor, easy to wear.

The purpose of this utility model is at above-mentioned prior art existing problems, proposes the improved blade wheel structure of a kind of employing, good integrity, the axial-flow pump that efficient is higher;

The further purpose of the utility model is the efficient axial-flow pump of a kind of low lift of design, big flow.

The utility model is by the following technical solutions: axial-flow pump comprises the support that motor is installed, pump case, the pump cover cover, main shaft, collar bush, fluid director, the impeller and the gaily decorated basket etc., be sleeved on the main shaft on the upper bearing (metal) in the support chamber, collar bush is passed in the bottom, stretch into and be set in the lower bearing at fluid director center, impeller and water inlet awl are fixed on the main shaft lower end, rotate by motor driving by main shaft, it is characterized in that said impeller is a narrow end taper double shrouded wheel down, its periphery circular cone ring seal, tapering α=16 °～24 °, be provided with the water guide chamber between impeller and the fluid director, the water inlet direction is equipped with streamline lead water awl in the lower end of fluid director, and fluid director upper end water outlet direction is equipped with water guide cone after the streamline.

For adapting to the requirement of low lift, big flow, the taper double shrouded wheel of this axial-flow pump is designed to three blades, periphery circular cone ring seal, and the flow angle β of blade is increased to inner edge from small to large gradually by outer rim, and its excursion is 16 °～40 °.

Connect support on the collar bush of this axial-flow pump, connect fluid director down, the following inner headed face of fluid director is connected pump cover, connects pump case by the pump cover overcoat, forms overall structure.It is cylindrical that described pump cover can be designed to its top, the bottom is conical shape, the inner conical surface of pump cover lower cone shape part is cooperated with the impeller clearance, and male cone (strobilus masculinus) cooperates with pump cover overcoat bonding, is controlled the height of water guide chamber by the cylindrical height on pump cover top.

The utility model is owing to adopt the taper double shrouded wheel, during work, its water outlet peripheral velocity is greater than the water intake peripheral velocity, produce negative pressure and increase water absorbing capacity, and set water guide chamber makes impeller and fluid director draw back certain distance, make flow rate of liquid and flow to lenitively and change, reduce the energy loss that causes because of liquid flow impact and whirling motion, increased the impeller inlet flow stream pressure, the forward and backward flow deflecting cone that fluid director is set, can reduce liquid stream whirling motion and cavitation erosion, improve the service behaviour of axial-flow pump.This axial-flow pump also has structural entityization, installs and repairs easily, characteristics such as long service life.

Below be drawing explanation of the present utility model:

Fig. 1 is the structural representation of this axial-flow pump;

Fig. 2 is the sectional view of enclosed disk of conical profile;

Fig. 3 is the half of plan view of Fig. 2 impeller;

Fig. 4 is the section unfolded drawing of the blade of Fig. 3 impeller along the camber line I;

Fig. 5 is the section unfolded drawing of the blade of Fig. 3 impeller along the camber line II;

Fig. 6 is the section unfolded drawing of the blade of Fig. 3 impeller along the camber line III;

Fig. 7 is the section unfolded drawing of the blade of Fig. 3 impeller along the camber line IV;

Fig. 8 is the section unfolded drawing of the blade of Fig. 3 impeller along the camber line V.

The utility model embodiment's CONSTRUCTED SPECIFICATION below is described in detail in detail with reference to the accompanying drawings:

As shown in Figure 1, this axial-flow pump top organic block 1, pump case 2 is fixed on the lower end of support by flange, and fluid director 6 suits are fixed on the lower end of pump case; Be provided with upper bearing (metal) 3 in the support chamber, the upper end suit of main shaft 4 is fixed on the upper bearing (metal) 3, and collar bush 5 is passed in the bottom, stretches into and be set in the lower bearing 7 at fluid director 6 centers, is provided with oil sealing 8 between main shaft under the lower bearing 7 and the fluid director; Impeller 10 and water inlet awl (being the impeller set screw nut) 16 are fixed on the lower end of main shaft, and this impeller is the taper double shrouded wheel, impeller periphery circular cone ring seal, the narrow end of taper down, impeller and the fluid director segment distance of being separated by, formation water guide chamber 9; The collar bush upper end is fixed on the support, and the lower end is fixed on the fluid director; The inner headed face of fluid director lower end is connected mutually with pump cover 13, the top of pump cover 13 is cylindrical, the bottom is conical, the inner conical surface and impeller 10 Spielpassung of this pump cover lower taper part, its male cone (strobilus masculinus) cooperates with pump cover cover 14 bondings, and the height of the cylindrical part on pump cover top is the height of water guide chamber; The pump cover set upper side is connected with pump case 2 flanges, and the lower end is connected with the gaily decorated basket 15 flanges; Water guide cone 11 after fluid director 6 upper end water outlet directions are equipped with streamline, fluid director lower end water inlet direction is equipped with streamline lead water awl 12; The taper double shrouded wheel structure of this axial-flow pump as shown in Figure 2, impeller has three blades, its periphery is with circular cone ring 10 _bSealing, tapering α=11 °; Fig. 3 is the half of plan view of Fig. 2 impeller, illustrates a wherein blade 10 _a, and press central angle (10 °～80 °) subregion to waterexit end B from feed-water end A; Fig. 4～Fig. 8 illustrates blade 10 among Fig. 3 respectively _aFrom the section unfolded drawing of outer rim to inner edge along camber line I～V, its flow angle β _I=16 °, β _II=16 °, β _III=20 °, β _IV=30 °, β _V=40 °.

Claims

1. axial-flow pump, comprise the support (1) that motor is installed, pump case (2), pump cover cover (14), main shaft (4), collar bush (5), fluid director (6), the impeller (10) and the gaily decorated basket (15) etc., be sleeved on the main shaft (4) on the upper bearing (metal) (3) in support (1) chamber, collar bush (5) is passed in the bottom, stretch into and be set in the lower bearing (7) at fluid director center, impeller (10) and water inlet awl (16) are fixed on the main shaft lower end, rotate by motor driving by main shaft, it is characterized in that said impeller (10) is a narrow end taper double shrouded wheel down, its periphery circular cone ring seal, tapering α=16 °～24 °, be provided with water guide chamber (9) between impeller (10) and the fluid director (6), the water inlet direction is equipped with streamline lead water awl (12) in the lower end of fluid director, and fluid director upper end water outlet direction is equipped with water guide cone (11) after the streamline.

2. axial-flow pump according to claim 1 is characterized in that said taper double shrouded wheel (10) is three blades, and the flow angle β of blade is increased to inner edge from small to large gradually by outer rim, and excursion is 16 °～40 °.

3. axial-flow pump according to claim 1, the following inner headed face that it is characterized in that said fluid director (6) is connected pump cover (13), the top of pump cover (13) is cylindrical, the bottom is conical, the inner conical surface and impeller (10) Spielpassung of this pump cover lower cone shape part, male cone (strobilus masculinus) cooperates with pump cover cover (14) bonding, the height of the cylindrical height control water guide chamber (9) on pump cover (13) top.