CN102734216A

CN102734216A - High-speed rotor structure of centrifugal blower

Info

Publication number: CN102734216A
Application number: CN201210250335XA
Authority: CN
Inventors: 金华明
Original assignee: 无锡杰尔压缩机有限公司
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2012-10-17

Abstract

The invention relates to a high-speed rotor structure of a centrifugal blower, which comprises a high-speed gear shaft, an impeller, a stay bolt, a C-shaped ring, a nut, a protection cover and a screw. One end of the stay bolt is connected with the high-speed gear shaft, and then sequentially penetrates through the impeller and the C-shaped ring, so as to fasten the impeller on the high-speed gear shaft by screwing the nut; the screw is screwed into a thread hole at one end of the stay bolt; and the protection cover is connected with the C-shaped ring. The high-speed gear shaft adopts a balancing disk structure between a bearing position of a radial bearing and a bearing position of a thrust bearing. The balancing disk is cylindrical and provided with a positioning shaft shoulder, and is homocentric with the high-speed gear shaft. The high-speed rotor structure is simple, the balancing disk structure at one end of a shaft is beneficial to the balancing of the center of gravity, the vibration amplitude of the impeller is reduced, the system stability is improved, the load of two radial bearings is effectively balanced, and a gap between the impeller and a spiral casing is reduced, so that the efficiency of the blower is improved.

Description

A kind of high speed rotor structure of centrifugal blower

Technical field

The present invention relates to a kind of high speed rotor structure of centrifugal blower, specifically a kind of modified model high gear axle construction of single-stage high-speed centrifugal blower belongs to the mechanical structure technical field.

Background technique

At present, at the single-stage high-speed centrifugal blower that is used in the aeration in sewage treatment system, impeller obtains high rotational speed through gear speed increaser.Motor connects with lower velocity shaft, and impeller connects with high speed shaft.In existing technology, high speed gear shaft one end connects impeller, behind the maze type sealing configuration, is supported by radial bearing.The other end is also supported by radial bearing, and holds the end to contact with thrust bearing, and two bearings are adjacent.When impeller was big, an end quality was bigger than normal, can make outside deviation of gravity center to two radial bearing of rotor-support-foundation system; Form a kind of cantilever structure, thereby make impeller when high-speed rotation, produce bigger vibrations; Reduced the stability of system; Need enlarge the gap between impeller and the spiral case simultaneously, to prevent scraping, and the enlarged meeting in gap causes the reduction of blower efficiency.

Summary of the invention

The objective of the invention is to overcome above-mentioned deficiency, thereby a kind of high speed rotor structure of centrifugal blower is provided, the center of gravity of its efficient balance rotor-support-foundation system, the vibration amplitude of reduction impeller, the stability of raising system makes blower have higher efficient simultaneously.

According to technological scheme provided by the invention, a kind of high speed rotor structure of centrifugal blower comprises high speed gear shaft, impeller, stay-bolt, C shape ring, nut, safety cover and screw; Said stay-bolt one end connects high speed gear shaft, passes impeller and C shape ring then successively, and nut is fastened on impeller on the high speed gear shaft through screwing; Said screw screws in the tapped hole of stay-bolt one end, and safety cover and C shape ring connect.Said high speed gear shaft adopts the balancing disk structure between radial bearing supporting place and thrust bearing supporting place.

As further improvement of the present invention, said balancing disk is cylinder type and has the location shaft shoulder, and balancing disk is concentric with high speed gear shaft.

Compared with present technology the present invention has the following advantages:

The present invention is simple in structure, and the balancing disk structure of axle head helps balanced center of gravity, reduces the impeller vibration amplitude, improves the stability of system, and the load of efficient balance two radial bearings reduces the gap between impeller and the spiral case, thereby improves the efficient of blower.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

Following the present invention will combine the embodiment in the accompanying drawing to further describe:

As shown in Figure 1, comprise high speed gear shaft 1, impeller 2, stay-bolt 3, C shape ring 4, nut 5, safety cover 6 and screw 7.

Said stay-bolt 3 one ends connect high speed gear shaft 1, pass impeller 2 and C shape ring 4 then successively, thereby through the nut 5 of screwing impeller 2 are fastened on the high speed gear shaft 1 then.Said screw 7 screws in the tapped hole of stay-bolt 3 one ends, thereby safety cover 6 and C shape ring 4 are connected.The A of said high speed gear shaft 1, B two places contact with radial bearing respectively, and the C place contacts with thrust bearing.Said high speed gear shaft 1 is that balancing disk 1-1 structure is (on high speed gear shaft between radial bearing supporting place A and thrust bearing supporting place C; And between radial bearing supporting place and thrust bearing supporting place, being cylindrical section, this cylindrical section has the location shaft shoulder; Balancing disk structure for gear shaft; Be a part that belongs to gear shaft), balancing disk 1-1 is cylinder type and has the location shaft shoulder, and balancing disk 1-1 is concentric with high speed gear shaft.

Whole rotor-support-foundation system is supported by two radial bearings and a thrust bearing, and intercepts gear-box and spiral case by the labyrinth sealing system.Motor drives high speed gear shaft through low speed gear, so that impeller obtains higher rotation speed.When impeller quality bigger than normal lays particular stress on, the balancing disk of the other end of high speed gear shaft can balanced whole rotor-support-foundation system center of gravity, center of gravity is remained in the middle of A and the B.Like this with regard to balance the load of two radial bearings; Avoided the vibrations that produce because of outside deviation of gravity center to the two bearings, improved the stability of system, also less clearance can be set between spiral case and the impeller simultaneously; Make the blower air loss reduce, further improve the efficient of blower.

Claims

1. the high speed rotor structure of a centrifugal blower is characterized in that: comprise high speed gear shaft (1), impeller (2), stay-bolt (3), C shape ring (4) and safety cover (6); Said stay-bolt (3) one ends connect high speed gear shaft (1), pass impeller (2) and C shape ring (4) then successively, through the nut of screwing (5) impeller (2) are fastened on the high speed gear shaft (1); Screw (7) screws in the tapped hole of stay-bolt (3) one ends, and safety cover (6) and C shape ring (4) connect; Said high speed gear shaft (1) adopts the balancing disk structure between radial bearing supporting place and thrust bearing supporting place.

2. the high speed rotor structure of a kind of centrifugal blower as claimed in claim 1 is characterized in that:

Said balancing disk (1-1) is for cylinder type and have the location shaft shoulder, and balancing disk is concentric with high speed gear shaft.