CN102162470A

CN102162470A - Pipeline-type axial flow centrifugal fan and eccentric flow guiding method

Info

Publication number: CN102162470A
Application number: CN2011100496060A
Authority: CN
Inventors: 吴伟; 吴澂喆
Original assignee: HANGZHOU RITONG BLOWER CO Ltd
Current assignee: Zhejiang Jiutong Machinery Technology Co., Ltd
Priority date: 2011-03-02
Filing date: 2011-03-02
Publication date: 2011-08-24
Anticipated expiration: 2031-03-02
Also published as: CN102162470B

Abstract

The invention relates to a pipeline-type centrifugal fan which not only has large flow of an axial flow fan, can be required to be designed into different flow rate pressure ratios, the air flow flows in and out axially and an eccentric flow guiding method. An enclosure is of a pipeline structure; an air intake end plate and an air out end plate are respectively installed at the front end and the rear end of the enclosure; the air flow enters the fan from a round port of the air intake end plate, is exhausted from a round port of the air outlet end plate, and the aim of the air flow in and out coaxially is achieved; a motor is positioned at the center of a pipeline; a centrifugal impellor is installed on a motor shaft, and a flow collector is arranged between the centrifugal impellor and the air intake end plate; a convergence port of the flow collector is adaptively inserted in the inlet of the impellor, and the air flow is guided smoothly into the centrifugal impellor; an air-out flow guiding device is installed at the rear part of the inner part of the enclosure, the convergence end of the air out flow guiding device aims at the round port of the air out end plate, and the air is guided to be exhausted from the round port; and a rectification flow guiding device is welded at the inner part of the enclosure, and the convergence end of the rectification flow guiding device is in clearance fit with the outer edge at the upper part of the centrifugal impellor.

Description

Pipe type axial flow centrifugal blower and centrifugal flow guiding method

Technical field

The present invention relates to that a kind of both to have had an axial-flow blower flow big, the air-flow that can require to be designed to various different flow pressure ratios is the pipe type centrifugal blower and the centrifugal flow guiding method of turnover axially, belongs to blower fan and makes the field.

Background technique

1, axial-flow blower is exactly the blower fan of the equidirectional operation of axle of air-flow and fan blade, and its performance characteristics is that flow is big, pressure is low; Using advantage is simple installation, coaxial with pipeline.Its deficiency: pressure is lower, can't realize long distance conveying and technology supply and exhaust.

2, centrifugal blower is air-flow to be sucked from the impeller front center throw away outside circumferential, the blower fan of discharging again from the exhaust outlet of casing tangent direction, its performance characteristics is the product that can require to be designed to various different flow pressure ratios, satisfies the demand of long distance conveying and technology supply and exhaust.Its deficiency: inlets and putlets of ventilation is 90 ^oArrange, the mounting point is big and can not arrange airduct on same axis.

Summary of the invention:

Purpose of design: avoid in the background technique both deficiencys, design that a kind of both to have had an axial-flow blower flow big, the air-flow that can require to be designed to various different flow pressure ratios is the pipe type centrifugal blower and the centrifugal flow guiding method of turnover axially.

Design proposal: in order to realize above-mentioned purpose of design.Design on a kind of blower fan (pipe type centrifugal blower) that the application concentrates the strong point of axial-flow blower and centrifugal blower is a major technique feature of the present invention.The purpose of doing like this is: the one, make full use of the Mechanical Builds formula that goes out, makes things convenient for mounting arrangement after axial-flow blower advances; The 2nd, improve blast, make it be issued to the performance of centrifugal blower, to satisfy the requirement of various different process in the type advantage of axial-flow blower; The 3rd, scientific design, simplified structure, reduce processing charges, be convenient to the expansion of non-standard equipment, be embodied in: the one, change into cylindric by traditional scroll casing shape casing, blower fan integral body becomes a kind of extremely simply columnar structured, and air-flow front end suction rear end from blower fan on same axis is sent, and is very easy to and installs and omitted other supporting facility; The 2nd, the receded disk impeller of the tapered shroud of impeller design, by the requirement of various different parameters, blade can adopt forward direction, radially, the backward type formula; The 3rd, in the periphery of impeller shroud the rectification and guide device is set, combine with casing, make air-flow discharge to change into directly and discharge from the blower fan rear portion by the exhaust outlet of common tangent direction.The present invention mainly is made up of impeller, casing, air intake/output end plate, slip ring, rectification and guide device, air-out fluid director, bearing and motor.Impeller is made up of blade, shroud, hub disk and reel, can adopt Fine Steel Casting iron or corrosion-resistant stainless steel manufacturing according to the difference of usage requirement, and through the dynamic balance check of strictness, running steadily.Casing is made the high-strength structure of carrying negative pressure, and its material also can be by the different mining of usage requirement with Fine Steel Casting iron or corrosion-resistant stainless steel manufacturing.

Technological scheme 1: a kind of pipe type axial flow centrifugal blower, casing is pipeline configuration, and air intake end plate, air-out end plate are installed on the front end and back end of casing respectively, and air-flow enters blower fan from the round mouth of air intake end plate, discharge from the round mouth of air-out end plate, reach the purpose of the coaxial turnover of air-flow; Motor is positioned at pipeline center, receded disk impeller be installed on the motor shaft and receded disk impeller and air intake end plate between be provided with slip ring, its slip ring convergence mouthful appropriateness is inserted the inlet of impeller, rule bundle air-flow enters receded disk impeller smoothly; The air-out fluid director is installed on the casing inner wall rear portion, and its convergence end is aimed at the round mouth of air-out end plate, and rule bundle air-flow is discharged thus; The rectification and guide device is welded in casing inner wall, the top outer rim Spielpassung of its convergence end and receded disk impeller.

Technological scheme 2: a kind of centrifugal flow guiding method of pipe type axial flow centrifugal blower, it is characterized in that: starting electrical machinery, the rotation of driven by motor receded disk impeller, effect is got rid of in the suction that the receded disk impeller rotation is produced, make air-flow enter slip ring from the round mouth of air intake end plate, make air-flow discharge to change into and discharge, reach the purpose of the coaxial turnover of air-flow by the round mouth of air-out end plate through air-out fluid director water conservancy diversion by the exhaust outlet of common tangent direction.

The present invention compares with background technique, the one, utilized that axial-flow blower is coaxial to advance air draft and the high advantage of centrifugal blower pressure, be designed to a kind of brand-new high pressure pipe type axial flow centrifugal blower, started a brand-new blower fan field, the upper pressure limit that makes blower fan is brought up to 3500Pa of the present invention by the 1000Pa of axial-flow blower, greatly expand the coaxial application area of advancing the air draft blower fan, satisfied the demand of numerous industries; The 2nd, profile is firm, succinct, attractive in appearance; The 3rd, install extremely easyly, only need pack into and can use in the middle of the pipeline; The 4th, selection is extensive, both can select common iron for use, also can select stainless steel material or plastics manufacturing for use.

Description of drawings

Fig. 1 is the structural representation of pipe type centrifugal blower.

Fig. 2 is the side-looking structural representation of Fig. 1.

Embodiment

Embodiment 1: with reference to attached Fig. 1 and 2.A kind of pipe type axial flow centrifugal blower, it comprises air intake end plate 1, slip ring 2, casing 3, impeller 4, rectification and guide device 5, motor 6, motor cabinet 7, blower fan seat 9, air-out fluid director 10, air-out end plate 11; Casing 3 is pipeline configuration, air intake end plate 1, air-out end plate 11 are installed on the front end and back end of casing 3 respectively, air-flow enters blower fan from the round mouth of air intake end plate 1, discharge from the round mouth of air-out end plate 11, reach the purpose of the coaxial turnover of air-flow, promptly described air intake end plate 1, air-out end plate 11 usefulness end plate fixing bolts 12 are installed on the front end and back end of casing 3 respectively, because of effect is got rid of in the suction of impeller 4, air-flow enters blower fan from the round mouth of air intake end plate 1, discharges from the round mouth of air-out end plate 11, reaches the purpose of the coaxial turnover of air-flow; Motor 6 is positioned at pipeline center, and promptly motor 6 connects with motor cabinet 7 usefulness motor fixing bolts, and motor cabinet 7 is welded in casing 3 inside; Receded disk impeller 4 is installed in 6 in motor and upward and between receded disk impeller 4 and the air intake end plate 1 is provided with slip ring 2, and its slip ring 2 convergences mouthful appropriateness is inserted the inlet of impellers 4, and smooth rule bundle air-flow enters receded disk impeller 4; Air-out fluid director 10 is installed on casing 3 inwall rear portions, and its convergence end is aimed at the round mouth (in the 30-40 degree scope option and comprise end value) of air-out end plate 11, and rule bundle air-flow is discharged thus; Rectification and guide device 5 is welded in casing 3 inwalls, the top outer rim Spielpassung of its convergence end and receded disk impeller 4.

Described motor cabinet 7 is welded in casing 3 inside.Described motor 6 connects with motor cabinet 7 usefulness motor fixing bolts 8.

Described rectification and guide device 5 have a certain degree with the combination of casing 3 inwalls (in the 40-50 degree scope and comprise end value), rule bundles air-flow throws away from the periphery of impeller 4 and changes axial back row into, be that rectification and guide device 5 is welded in casing 3 inwalls, the top outer rim Spielpassung of its convergence end and impeller 4, rectification and guide device 5 has a certain degree with the combination of casing 3 inwalls, and rule bundle air-flow throws away from the periphery of impeller 4 and changes axial back row into.

Described casing 3 outer walls bottom is symmetrically welded with blower fan seat 9, and promptly blower fan seat 9 is symmetrically welded in casing 3 outer walls bottom.

Embodiment 2: on embodiment 1 basis, a kind of centrifugal flow guiding method of pipe type axial flow centrifugal blower, starting electrical machinery 6,4 rotations of driven by motor receded disk impeller, effect is got rid of in the suction that receded disk impeller 4 rotations are produced, make air-flow enter slip ring 2, make air-flow discharge to change into and discharge, reach the purpose of the coaxial turnover of air-flow by the round mouth of air-out end plate 11 through air-out fluid director water conservancy diversion by the exhaust outlet of common tangent direction from the round mouth of air intake end plate 1.

What need understand is: though the foregoing description is to the mentality of designing of the present invention detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention is described; rather than to the restriction of mentality of designing of the present invention; any combination, increase or modification that does not exceed mentality of designing of the present invention all falls within the scope of protection of the present invention.

Claims

1. pipe type axial flow centrifugal blower, it is characterized in that: casing is pipeline configuration, and air intake end plate, air-out end plate are installed on the front end and back end of casing respectively, and air-flow enters blower fan from the round mouth of air intake end plate, discharge from the round mouth of air-out end plate, reach the purpose of the coaxial turnover of air-flow; Motor is positioned at pipeline center, receded disk impeller be installed on the motor shaft and receded disk impeller and air intake end plate between be provided with slip ring, its slip ring convergence mouthful appropriateness is inserted the inlet of impeller, rule bundle air-flow enters receded disk impeller smoothly; The air-out fluid director is installed on the casing inner wall rear portion, and its convergence end is aimed at the round mouth of air-out end plate, and rule bundle air-flow is discharged thus; The rectification and guide device is welded in casing inner wall, the top outer rim Spielpassung of its convergence end and receded disk impeller.

2. pipe type axial flow centrifugal blower according to claim 1, it is characterized in that: described motor cabinet is welded in casing inside.

3. pipe type axial flow centrifugal blower according to claim 2 is characterized in that: described motor connects with the motor fixing bolt with motor cabinet.

4. pipe type axial flow centrifugal blower according to claim 1 is characterized in that: the combination of described rectification and guide device and casing inner wall has a certain degree, and rule bundle air-flow throws away from the periphery of impeller and changes axial back row into.

5. pipe type axial flow centrifugal blower according to claim 1 is characterized in that: air intake end plate, air-out end plate are installed on the front end and back end of casing respectively with the end plate fixing bolt.

6. pipe type axial flow centrifugal blower according to claim 1 is characterized in that: described casing outer wall bottom is symmetrically welded with the blower fan seat.

7. the centrifugal flow guiding method of a pipe type axial flow centrifugal blower, it is characterized in that: starting electrical machinery, the rotation of driven by motor receded disk impeller, effect is got rid of in the suction that the receded disk impeller rotation is produced, make air-flow enter slip ring from the round mouth of air intake end plate, make air-flow discharge to change into and discharge, reach the purpose of the coaxial turnover of air-flow by the round mouth of air-out end plate through air-out fluid director water conservancy diversion by the exhaust outlet of common tangent direction.