CN201916216U

CN201916216U - Cantilever type single-stage centrifugal blower

Info

Publication number: CN201916216U
Application number: CN2010206914348U
Authority: CN
Inventors: 王学军; 李雀屏; 张勇; 梅元平; 张玉珠; 惠洪杰; 褚风海; 鲁鹏学; 赵海峰; 张鹏飞; 金鑫; 段亚琼
Original assignee: SHENYANG BLOWER WORKS GROUP Corp; Shenyang Turbo Machinery Co Ltd
Current assignee: SHENYANG BLOWER WORKS GROUP Corp; Shenyang Turbo Machinery Co Ltd
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2011-08-03
Anticipated expiration: 2020-12-30

Abstract

The utility model relates to an air blower in the field of phthalic anhydride and acid production, in particular to a cantilever type single-stage centrifugal blower, which comprises an impeller, an air inlet pipe, a bearing box, a spindle and a volute casing. The impeller is a three-dimensional semi-open type impeller, 13 blades are uniformly distributed along the periphery direction of a disc of the impeller and are in a spatial twisting type, the spindle is a cantilever shaft and is rotatably mounted in the bearing box, the impeller is mounted at one end of the spindle and positioned via a shaft shoulder on the spindle, the volute casing is connected with a diffuser, air flow enters the volute casing via the impeller and the diffuser, and a runner of the impeller is tapered. The impeller is the three-dimensional semi-open impeller, is strong in work applying ability, low in block factors and large in energy head and can meet requirements of the field. Air circulation is wonderful, air quantity is high, an impeller of an original machine is provided with 19 blades, the diameter of the impeller is reduced by 10% and the weight thereof is lightened by 25% under the same work conditions, simultaneously, the diameter of the volute casing is also reduced, and material and processing costs are greatly lowered.

Description

A kind of cantilever type one-stage centrifugal blower

Technical field

The utility model relates to the blower in phthalic anhydride and the relieving haperacidity field, specifically a kind of cantilever type one-stage centrifugal blower.

Background technique

In phthalic anhydride and relieving haperacidity field, blower is one of nucleus equipment, and two kinds of forms are arranged, and is respectively S type double suction blower and single-stage cantilever type blower.S type blower adopts double suction binary impeller or 3 d impeller back-to-back, and the single-stage cantilever type adopts half-open impeller axial admission, any direction exhaust.

S type blower fan is with a long history, achievement is numerous, be widely used in acid production with sulphur field below 200,000 tons, generally have only 76% (binary impeller) but its efficient is low, 80～81% (3 d impellers), and need the increase coupler to carry out the tolerance adjusting, increase cost on the one hand, increase air horsepower, on the other hand because the quality problems of coupler repeatedly cause the discontented of user; Unit cantilever type blower fan is mainly used in the phthalic anhydride field, and axial admission is simple in structure easy for installation, but efficient is not high, generally has only 80～83%, and impeller can be low, and diameter is big, waste material and space, and the operating mode scope is also narrow.

The model utility content

In order to solve the problems referred to above that existing two kinds of form blowers exist, the purpose of this utility model is to provide a kind of cantilever type one-stage centrifugal blower.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises impeller, suction tude, bearing housing, main shaft and spiral case; Described impeller is the ternary half-opened impeller.

Wherein: described main shaft is cantilevered axle, is installed in rotation in the bearing housing that impeller is installed in an end of main shaft, locatees by the shaft shoulder on the main shaft; Be connected with Diffuser on the described spiral case, air-flow enters spiral case through impeller and Diffuser; Described Diffuser is half high Diffuser; The runner of described impeller is a gradual shrinkage; Along the circumferential direction be evenly equipped with a plurality of blades on the wheel disc of impeller, each blade is the spatial warping type; Described blade is 13.

Advantage of the present utility model and good effect are:

1. impeller of the present utility model adopts the half-open impeller of ternary, and the blade of impeller is 13, and the acting ability is strong, and blockage factor is little, and the energy head is big, can satisfy the requirement in field; Gas communication is good, large-minded especially, and 19 blades of former type impeller, the utility model impeller diameter under equal operating mode wants little by 10%, and weight reduces 25%, has also reduced the spiral case diameter simultaneously, has reduced material and processing cost greatly.

2. stator component is carried out the aeroperformance analysis and optimization, make flow losses be reduced to minimum, stator elements efficient improves 1～2%

3. impeller intensity of the present utility model is good, and adopts integral body to mill system, can select for use the SFC100 material to replace the FV520B material to satisfy equal operating mode, and cost of material reduces by 50%

4. the impeller Placement is improved to the flange plate connection by the interference connection, makes set steady better, and is more on probation in long-term operation, is convenient to I﹠M.

5. operating mode broadness, wideer by about 8% than former type operating mode, make the cantilever type single-stage blower also be adapted to the relieving haperacidity field like this, because the relieving haperacidity field requires the flow adjustment range broadness, so all turned speed by coupler in the past and the German KKK of import company unit cantilever type blower fan is realized with S type blower fan; Operating mode wide ranges of the present utility model is regulated and can be met consumers' demand by stator, and impeller adiabatic efficiency exceeds 5-8% than S type 3 d impeller blower fan, by the cancellation coupler, power saves 3% again, and has reduced unit cost and user's civil engineering and operation cost, can be widely used in the relieving haperacidity field.

Description of drawings

Fig. 1 is an internal structure schematic representation of the present utility model;

Fig. 2 is the plan view of impeller among Fig. 1;

Fig. 3 is the side view cutaway drawing of Fig. 2;

Wherein: 1 is impeller, and 2 is Diffuser, and 3 is suction tude, and 4 is bearing housing, and 5 is spring bearing, and 6 is thrust bearing, and 7 is entry guide vane, and 8 is main shaft, and 9 is spiral case, and 10 is wheel disc, and 11 is blade.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model comprises impeller 1, Diffuser 2, suction tude 3, bearing housing 4, entry guide vane 7, main shaft 8 and spiral case 9, main shaft 8 is cantilevered axle, is installed in rotation in the bearing housing 4 by spring bearing 5 and thrust bearing 6, impeller 1 is installed in an end of main shaft 8, by the shaft shoulder location of main shaft 8; Be connected with Diffuser 2 on the spiral case 9, air-flow enters spiral case 9 through impeller 1 and Diffuser 2, and this Diffuser 2 is half high Diffuser, can correspondingly change according to the diameter of impeller 1; Be provided with entry guide vane 7 in the suction tude 3, this entry guide vane 7 is positioned at the inlet of impeller 1.Impeller 1 is the ternary half-opened impeller, and its runner is a gradual shrinkage, along the circumferential direction is evenly equipped with 13 blades 11 on the wheel disc 10 of impeller 1, and each blade is the spatial warping type.

Gas is through suction tude 3, and by entry guide vane 7 (entry guide vane can according to the regulating working conditions flow), 1 pair of gas acting of impeller back be changed potential energy to kinetic energy into efficiently at Diffuser 2, again through the required process pipelines of spiral case 9 supplies.Impeller of the present utility model is the ternary half-opened impeller, have energy-efficient, the characteristics that range of flow is wide; Guaranteed the stable operation of unit simultaneously.

The utility model adopts the ternary half-opened impeller, improves ≈ 5% than old type efficient, as following table:

Claims

1. a cantilever type one-stage centrifugal blower comprises impeller, suction tude, bearing housing, main shaft and spiral case; It is characterized in that: described impeller (1) is the ternary half-opened impeller.

2. by the described cantilever type one-stage centrifugal of claim 1 blower, it is characterized in that: described main shaft (8) is cantilevered axle, is installed in rotation in the bearing housing (4), and impeller (1) is installed in an end of main shaft (8), locatees by the shaft shoulder on the main shaft (8); Be connected with Diffuser (2) on the described spiral case (9), air-flow enters spiral case (9) through impeller (1) and Diffuser (2).

3. by the described cantilever type one-stage centrifugal of claim 2 blower, it is characterized in that: described Diffuser (2) is half high Diffuser.

4. by the described cantilever type one-stage centrifugal of claim 1 blower, it is characterized in that: the runner of described impeller (1) is a gradual shrinkage.

5. by the described cantilever type one-stage centrifugal of claim 1 blower, it is characterized in that: along the circumferential direction be evenly equipped with a plurality of blades (11) on the wheel disc (10) of described impeller (1), each blade is the spatial warping type.

6. by the described cantilever type one-stage centrifugal of claim 5 blower, it is characterized in that: described blade is 13.