CN102345634B

CN102345634B - Energy-saving boiler forced and induced draft fan series model

Info

Publication number: CN102345634B
Application number: CN201010243447.3A
Authority: CN
Inventors: 朱艳丽; 朱之墀; 王延; 李嵩; 陈凤义; 梁德春; 刘沪红
Original assignee: SHENYANG BLOWER RESEARCH INSTITUTE CO LTD
Current assignee: SHENYANG BLOWER RESEARCH INSTITUTE CO LTD
Priority date: 2010-08-03
Filing date: 2010-08-03
Publication date: 2014-04-02
Anticipated expiration: 2030-08-03
Also published as: CN102345634A

Abstract

An energy-saving boiler forced and induced draft fan series model comprises a housing, an impeller and an air inlet, and is characterized in that the impeller mainly comprises sixteen blades, an impeller cover, an impeller disk and an impeller hub. The sixteen backward plate-like blades are circumferentially and evenly distributed, and are welded between the cambered impeller cover and the flat impeller disk, which are mounted on the impeller hub. The housing is a volute formed by welded plates, the air inlet is of a welded structure, and the profile of the air inlet is shaped like a conical arc which is axially converged. The model is widely applicable, the blades of the impeller are backward plate-like blades, so that an electromotor cannot be easily overloaded, the model has the advantages of high efficiency, energy saving, wide efficiency range and low noise, the dynamic pressure difference between the inlet and the outlet is small, and the model number can be reduced. The abrogation of the inlet of the blades is little, so that the service life of the impeller can be prolonged, and the model is convenient to machine.

Description

Boiler drum lead energy-saving fan series model

Technical field

The present invention relates to a kind of blower fan, specifically relate to a kind of 5-55 type boiler drum lead energy-saving fan series model.

Background technique

The blower fan great majority that domestic market is sold are products of the 60 to 70's exploitation, as series product such as 4-73,4-72,9-19,9-26,5-48,6-48, T4-72, also in every field, apply widely so far.Some enterprises are by combining with universities and colleges or introduction and some new products of independent development still can not meet growing market demand far away in recent years, for the fan performance level in some field, also have very large potentiality to dig.Severe competition model in the face of blower fan market, only improves constantly blower fan technical merit, just can be competitive.And the aeroperformance of the blower fan most important constituent element that is it.One Fans structure is good again, appearance quality is good again, if performance does not reach user's requirement, can cause very large economic loss to user, because of blower fan quality problems, to entrust mechanical industry Fan Product quality supervision inspection center to carry out the case of technology ruling a lot of in recent years, and problem much all goes out aspect aeroperformance.In Selection and Design process, in order to meet user's performance parameter, manufactory selects less than suitable blower fan type in existing sample, and certain model blower fan is improved, and is not hundred-percent sure again in addition.Because type selecting is improper, when blower fan turns round at the scene, need only pipe network and slightly change blower fan with regard to surge.Although the flow pressure of blower fan can be chosen sometimes, due to not in efficient district, or original peak efficiency was just not high, selected power of motor very large, cannot compete with other competitive bidding units, so just lost the chance of competitive bidding.

For meeting the demand of the fast development of China's economy to blower fan, improve the technical merit of Fan Product, implement national information portion about the eliminating of outmoded products progressively, promote new product spirit.So advantage of the fan design software development of Shenyang Blower research institute and Tsing-Hua University's fluid internal class, application and experimental study ability, combination among the strong ones, in March, 2005, set up the project, blower fan series type spectrum for existing most manufacturer production, in line with plugging a gap, take energy-efficient, it is target, and the principle that replaces as far as possible broad-spectrum other series product, plans and develops four blower fan series models.By the time of 5 years, Tsing-Hua University's fluid the complete machine complex flowfield of multiple design proposal is carried out to numerical simulation, fan performance is estimated and hundreds of time Pneumatic Calculation has been carried out in optimization, the manufacturing of Shenyang Blower research institute more than 30 cover blower fan models, carry out 100 test of many times researchs, completed this project.Four blower fan series models have all reached re-set target.

Summary of the invention

Object of the present invention, is to provide boiler and draws energy-saving fan model with drum, is one of above-mentioned four blower fan series, and trade name is 5-55 boiler drum lead energy-saving fan series model.

The technological scheme adopting is:

Boiler drum lead energy-saving fan series model, comprises casing, impeller, intake grill and transmission group.

Described impeller is mainly comprised of 16 backward plate blades, arc wheel cap, plate shaped wheel disc and wheel hub.16 backward plate blades edges are circumferentially uniform, and are welded between arc wheel cap and plate shaped wheel disc, are assembled with wheel hub.

Described casing is the volute body that sheet material is welded, and intake grill is welded structure, and its molded line is the cone arc of restraining vertically.

Described transmission group comprises main shaft, bearing housing etc., is known technology.

Purposes of the present invention:

Blower fan series model of the present invention belongs to intermediate flow, medium pressure category, and the highest fan efficiency is 87.08%.With the blower fan of this modeling design can be used as forced-and-induced draft fan steam boiler for, smelt smoke evacuation induced draught fan, 35-410 ton/time forced-and-induced draft fan for circulating fluidized bed boiler, primary air fan, overfire air fan, Iron And Steel Plant's smelting dusting apparatus with dedusting fan etc.Also can be used for mine ventilation system and general ventilation system.This model has been filled up non dimensional curve, and certain section of blank that pressure coefficient is 0.5 shows its advantage that performance is good, efficiency is high in Fan Selection.This serial fan also can replace by reducing plane No. most of operating point of 5-47 (II type), 5-48, and can be for meeting above purposes, in 5-47 (II type), 5-48 flow system bigger than normal, and energy-efficient.

The invention has the advantages that:

1, of many uses, filled up ventilator series type spectrum blank.

2, impeller is backward plate blade, so motor is difficult for overload.

3, energy-efficient, efficient district is wide, noise is low.

4, outlet and import dynamic pressure are poor little, can reduce plane No..

5, blade import wearing and tearing are little, can extend the working life of impeller.

6, easy to process.

Now illustrate:

Give an example 1: be in three change samples below, 5-48No12.5C; N=1400r/min; Certain operating point parameter during ρ=0.85kg/m3: flow=67803 (m3/h); Total head=2794Pa; Internal efficiency=75.3%; Internal power=69.2kw.There is now 5-55 series model, at the optional 5-55No11.7C of certain non dimensional curve section (former blank) herein.Table 1 has provided under same rotating speed and import density, the performance comparison result of 5-55No11.7C and 5-48No12.5C.

Table 1

As seen from Table 1: under same rotating speed and density, meet above same performance parameter, select 5-48 need select No12.5; And select 5-55 to select No11.7 just passable.Impeller adiabatic efficiency increases by 9.03%, impeller power reduction 7.25%.

Give an example 2: be in 5-47 (II) sample of many manufacturer production below, No12D; N=1480r/min; Certain operating point parameter during ρ=0.742g/m3: flow=62850 (m3/h); Total head=2638Pa; Impeller adiabatic efficiency=75.4%; Impeller power=61.06kw.There is now 5-55 series model, at the optional 5-55No11.3D of certain non dimensional curve section (former blank) herein.Table 2 has provided under same rotating speed and import density, the performance comparison result of 5-55No11.3D and 5-47 (II) No12D.

Table 2

As seen from Table 2: under same rotating speed and density, meet above same performance parameter, select 5-47 (II) need select No12D; And select 5-55 to select No11.3D just passable.Impeller adiabatic efficiency increases by 11%, impeller power reduction 8.8%.

This model is same with 6-35 in addition, is by numerical simulation calculation is carried out in impeller interior three-dimensional flow field, optimizes flow passage component size, the realistic air current flow direction of determined inlet blade angle, and blade import wearing and tearing are minimum.And 5-48,5-47 (II) etc. are by the mobile Theoretical Design of binary, and facts have proved blade import serious wear, 5-55 has solved the blade import wear problem of the blower fan existence of types such as 5-48,5-47 (II), can extend the working life of impeller.

In sum, 5-55 compares and has best aeroperformance with similar blower fan, with its efficient, low noise, zero dimension performance region of living in and the import little advantage of wearing and tearing, necessarily has wide application space, and its product has very strong competitive ability.

Accompanying drawing explanation

Fig. 1 is a kind of example structure schematic diagram of the present invention.

Fig. 2 is the A-A view of Fig. 1.

Fig. 3 is blade wheel structure schematic diagram.

Fig. 4 is the right elevation of Fig. 3.

Fig. 5 is zero dimensional performance curve figure of the present invention.Wherein Φ is that flow coefficient, Ψ are that coefficient of total pressure, λ are power factor, η r impeller adiabatic efficiency.

Embodiment

Boiler drum lead energy-saving fan series model, comprises casing 1, impeller 2, intake grill 3 and transmission group 4.

Described impeller is mainly comprised of 16 backward plate blades 5, arc wheel cap 6, plate shaped wheel disc 7 and wheel hubs 8.16 backward plate blades 5 edges are circumferentially uniform, and are welded between arc wheel cap 6 and plate shaped wheel disc 7, are assembled with wheel hub 8.

Flow passage component major character:

Blade 5 outlet diameters of impeller 2 are 800mm, and inlet diameter is 519.5mm, and width is 210.6mm, and exit width is 139.8mm, and blade outlet angle is 51 °.

The inlet diameter of described intake grill 3 is 568mm, and width is 338.6mm.

The width of described casing 1 is 349.5mm, and casing export center is 655.2mm to casing centre distance, and casing outlet is 692 * 349.5mm.

The optimal working point zero dimension performance parameter of described correspondence is: flow coefficient 0.1733, pressure coefficient 0.5260, power factor 0.1047, fan efficiency 87.08%.

Because product line designs by modeling, so the above-mentioned flow passage component size of impeller, intake grill and casing can zoom in or out on year-on-year basis and make series product, all within protection.

Claims

1. boiler drum draws an energy-saving fan, comprises casing (1), impeller (2), intake grill (3) and transmission group (4); Described impeller (2) is mainly comprised of 16 backward plate blades (5), arc wheel cap (6), plate shaped wheel disc (7) and wheel hub (8), 16 backward plate blades (5) are along circumferentially uniform, and be welded between arc wheel cap (6) and plate shaped wheel disc (7), be assembled with wheel hub (8); The volute body that described casing (1) is welded for sheet material, intake grill (3) is welded structure, its molded line is the cone arc of restraining vertically, it is characterized in that, described impeller (2): blade (5) outlet diameter is 800mm, and inlet diameter is 519.5mm, and width is 210.6mm, exit width is 139.8mm, and blade outlet angle is 51 °; The inlet diameter of described intake grill (3) is 568mm, and width is 338.6mm; Described casing (1) is volute body, and width is 349.5mm, and casing (1) export center is 655.2mm to casing (1) centre distance, and casing outlet is 692 * 349.5mm.