CN101865157A

CN101865157A - Centrifugal water pump

Info

Publication number: CN101865157A
Application number: CN 201010197780
Authority: CN
Inventors: 王清旭; 陈晓飞; 魏志明; 谭建松; 黄晓东
Original assignee: No70 Research Institute Of China North Industries Group Corp
Current assignee: No70 Research Institute Of China North Industries Group Corp
Priority date: 2010-06-11
Filing date: 2010-06-11
Publication date: 2010-10-20
Also published as: WO2011153824A1

Abstract

The invention relates to a centrifugal water pump, belonging to the hydraulic technical field. The centrifugal water pump comprises a transmission shaft, a bearing, a fastening piece, a bearing seat, a volute, an inlet water pan, an impeller and a mechanical seal. The impeller consists of long blades and short blades. Five long blades and five short blades are arranged in a spacing way. The diameter of the middle shaft hole of the impeller is 18mm, the diameter of a hub is 24mm, the outer diameter of the impeller is 133.6mm, the length of each long blade is 46.8mm, the length of each short blade is 26.8mm, the diameter of the inlet of the long blade and the short blade is 66mm, the setting angle of the inlet of the long blade and the short blade is 36 degrees, the height of the inlet of the long blade and the short blade is 17mm, the thickness of the long blade and the short blade is 3.5mm, the setting angle of the outlet of the long blade and the short blade is 45 degrees and the height of the outlet of the long blade and the short blade is 10.3mm. The runner of the volute is matched with the impeller. The taper of the suction chamber of the inlet water pan is 12.5 degrees. The invention has the advantages of high efficiency, energy saving, good workability, light weight and small volume.

Description

A kind of Centrifugal water pump

Technical field

The invention belongs to the hydraulics field, be specifically related to a kind of Centrifugal water pump.

Background technique

At present, Centrifugal water pump mainly adopts the impeller of single curved blade pattern, generates the blade of the impeller of water pump by simple circular arc camber, though the number of blade is that 4～5 this kind impellers are simple in structure usually, but its efficient is lower, has not satisfied the requirement of Efficient water pump; The water pump volute adopts simple Archimedes spiral form; The suction chamber of water pump adopts the axial suction chamber of straight-tapered, and tapering is generally 8 °, has had a strong impact on the efficient of water pump.

The increasingly stringent that requires along with national energy-saving and emission-reduction, and present domestic water pump industry, the efficient of particularly agricultural irrigation industry water pump is generally all about 30%～45%, energy waste is serious though price is low, and the external single price of high-quality high efficiency water pump is generally all in thousands of units, and complex structure.

Summary of the invention

Purpose of the present invention is just in order to solve the deficiencies in the prior art, and proposes a kind of Centrifugal water pump.

The technical solution adopted in the present invention is: a kind of Centrifugal water pump, comprise transmission shaft, bearing, fastening piece, bearing support, spiral case, water inlet connects dish, impeller and mechanical seal, the bearing interference is installed on the bearing support, transmission shaft and bearing inner race interference are installed, fastening piece is two, spiral case is connected with bearing support by a fastening piece, mechanical seal is installed in the seat hole of spiral case, transmission shaft passes the axis hole of mechanical seal, impeller is connected with the transmission shaft interference, uniform 3 equalizing orifices on the impeller, water inlet connects dish and is connected by another fastening piece with spiral case, described impeller comprises linear leaf and short blade, each 5 alternate layout of linear leaf and short blade, impeller intermediate shaft hole diameter is 18mm, hub diameter is 24mm, impeller outer diameter is 133.6mm, length of a film 46.8mm comes into leaves, the long 26.8mm of short blade, linear leaf and short blade import laying angle are 36 °, and linear leaf and short blade inlet height are 17mm, and linear leaf and short blade thickness are 3.5mm, 45 ° of linear leaf and short blade outlet laying angles, it is 10.3mm that linear leaf and short blade go out open height.

The water outlet of described spiral case adopts radially water outlet form, and the runner and the impeller of spiral case are complementary; Described water inlet connects dish and is the axial suction chamber of straight-tapered, and the suction chamber tapering is 12.5 °.

Beneficial effect of the present invention: water pump blade adopts antecurvature sweepback form, and the form that blade pass is crossed sculptured surface modeling generates, and satisfies the requirement of energy-efficient water pump; The water pump spiral case is realized the even of flow velocity, the hydraulic loss of less water pump by the area in each cross section of control.

It is good that this water pump has processability, and low to the process equipment requirement, the efficient of water pump is not less than 69%, improves more than 50% than market like product efficient, and water pump weight saving is more than 30%, and volume reduces more than 35%.

Description of drawings

The present invention has 2 width of cloth accompanying drawings, and wherein Fig. 1 is a most preferred embodiment of the present invention, also can make the accompanying drawing of specification digest.

Fig. 1, be a kind of structural representation of Centrifugal water pump;

Fig. 2, be the blade wheel structure schematic representation of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing most preferred embodiment of the present invention is further described.

As shown in Figure 1, a kind of Centrifugal water pump, comprise that transmission shaft 1, bearing 2, fastening piece 3, bearing support 4, spiral case 5, water inlet connect dish 6, impeller 7 and mechanical seal 8, bearing 2 interference are installed on the bearing support 4, transmission shaft 1 is installed with bearing 2 inner ring interference, fastening piece 3 is two, spiral case 5 is connected with bearing support 4 by a fastening piece 3, mechanical seal 8 is installed in the seat hole of spiral case 5, transmission shaft 1 passes the axis hole of mechanical seal 8, impeller 7 is connected with transmission shaft 1 interference, and water inlet connects dish 6 and is connected by another fastening piece 3 with spiral case 5.The water outlet of spiral case 5 adopts radially water outlet form, and the runner of spiral case 5 and impeller 7 are complementary, and water inlet connects dish 6 and is the axial suction chamber of straight-tapered, and the suction chamber tapering is 12.5 °.

As shown in Figure 2, uniform 3 equalizing orifices 9 on the impeller 7, impeller 7 comprises linear leaf 10 and short blade 11, linear leaf 10 and short blade 11 each 5 alternate layout, impeller 7 intermediate shaft hole diameters are 18mm, impeller 7 wheel hubs 12 diameters are 24mm, impeller 7 external diameters are 133.6mm, linear leaf 10 long 46.8mm, short blade 11 long 26.8mm, linear leaf 10 and short blade 11 import laying angles are 36 °, linear leaf 10 and short blade 11 inlet height are 17mm, linear leaf 10 and short blade 11 thickness are 3.5mm, 45 ° of linear leaf 10 and short blade 11 outlet laying angles, and it is 10.3mm that linear leaf 10 and short blade 11 go out open height.

Linear leaf 10 and short blade 11 single faces are arranged a side of impeller 7, adopt antecurvature sweepback form.

Working procedure

Water pump connects axial water inlet water inlet on the dish 6 by water inlet, water pump transmission shaft 1 is by external motivational drive, impeller 7 links together by key and transmission shaft 1 interference, and the water that the rotation of impeller 7 enters water intake gets rid of into spiral case 5 water channels, again by water pump water outlet water outlet radially.

Claims

1. Centrifugal water pump, comprise transmission shaft (1), bearing (2), fastening piece (3), bearing support (4), spiral case (5), water inlet connects dish (6), impeller (7) and mechanical seal (8), bearing (2) interference is installed on the bearing support (4), transmission shaft (1) is installed with bearing (2) inner ring interference, fastening piece (3) is two, spiral case (5) is connected with bearing support (4) by a fastening piece (3), mechanical seal (8) is installed in the seat hole of spiral case (5), transmission shaft (1) passes the axis hole of mechanical seal (8), impeller (7) is connected with transmission shaft (1) interference, impeller (7) is gone up uniform 3 equalizing orifices (9), water inlet connects dish (6) and is connected by another fastening piece (3) with spiral case (5), it is characterized in that: described impeller (7) comprises linear leaf (10) and short blade (11), each 5 alternate layout of linear leaf (10) and short blade (11), impeller (7) intermediate shaft hole diameter is 18mm, wheel hub (12) diameter is 24mm, impeller (7) external diameter is 133.6mm, the long 46.8mm of linear leaf (10), the long 26.8mm of short blade (11), linear leaf (10) and short blade (11) import laying angle are 36 °, linear leaf (10) and short blade (11) inlet height are 17mm, linear leaf (10) and short blade (11) thickness are 3.5mm, linear leaf (10) and short blade (11) outlet laying angle are 45 °, and it is 10.3mm that linear leaf (10) and short blade (11) go out open height;

The water outlet of described spiral case (5) adopts radially water outlet form, and the runner of spiral case (5) and impeller (7) are complementary; It is the axial suction chamber of straight-tapered that described water inlet connects dish (6), and the suction chamber tapering is 12.5 °.