CN2742194Y

CN2742194Y - Improved L series roots blower

Info

Publication number: CN2742194Y
Application number: CNU2004200968279U
Authority: CN
Inventors: 刘兆清; 景奉尚
Original assignee: SHANDONG HAIFUDE MACHINERY CO Ltd
Current assignee: SHANDONG HAIFUDE MACHINERY CO Ltd
Priority date: 2004-10-13
Filing date: 2004-10-13
Publication date: 2005-11-23
Anticipated expiration: 2014-10-13

Abstract

The utility model relates to an improved L series Roots blower belonging to a blower, mainly solving the problems which the existing L series Roots blowers generate great vibration and high noise and have a low strength shaft. The utility model comprises a casing, an impeller installed in the casing and an impeller shaft which is used to fix the impeller. The utility model is characterized in that the impeller is of trilobed involuted line type, both the air inlet and the air outlet on the casing are of spiral line types, and an interference fit is obtained between the impeller and the impeller shaft. The resultant force borne by the impeller, the vibration and the noise are reduced and the strength of the impeller shaft is improved by the improvement of the L series Roots blower. At the same time, the centering accuracy of the impeller is also improved to a certain extent.

Description

Modified model L series Roots blower

Affiliated technical field

The utility model relates to a kind of blower, especially a kind of modified model L series Roots blower.

Background technique

At present, the impeller of L series Roots blower is two leaf involute-types, and the casing porting is rectangular, and is because the flow-reversing impingement of pressurized gas makes blower fan produce judder and noise, under high speed and high pressure, particularly evident when blower is worked; And impeller connects for singly-bound with axle, owing to processed keyway on the axle, the intensity of axle decreases.

Summary of the invention

In order to overcome the shortcoming that above-mentioned prior art exists, the purpose of this utility model provides a kind of modified model L series Roots blower that can effectively reduce vibration, reduce noise and maintenance impeller shaft intensity.

Main technical schemes of the present utility model is:

Modified model L series Roots blower, it comprises casing, is installed in impeller and impeller shaft in the casing, it is characterized in that: impeller is three leaf involute-types, this structure can make impeller turn around by advance for twice, air draft becomes to advance for three times, air draft, what reduced that impeller bears makes a concerted effort; Suction port, relief opening on the casing are spiral line type, can reduce the flow-reversing impingement that pressurized gas caused in the blower work, thereby reduce vibration and noise; Be interference fit between impeller and the impeller shaft, thus keyway need not be processed on the impeller shaft, thus having improved the intensity of axle, the centering precision of impeller also is increased simultaneously.

Other technologies are same as the prior art.

The beneficial effects of the utility model are: this kind modified model L series Roots blower can effectively reduce vibration and noise, prolongs the working life of machine.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a casing structure plan view of the present utility model;

Fig. 2 is the partial cutaway plan view of Fig. 1;

Fig. 3 is an impeller sectional view of the present utility model.

1 casing among the figure, 2 impellers, 3 suction ports, 4 relief openings.

Embodiment

It comprises the utility model casing 1, is installed in impeller 2 and impeller shaft in the casing.Its improvements are:

Impeller 2 is three leaf involute-types, sees Fig. 3, this structure can make impeller 2 circle by advance for twice, air draft becomes to advance for three times, air draft, what reduced that impeller 2 bears makes a concerted effort.

Suction port 3, relief opening 4 on the casing 1 are spiral line type, and as shown in Figure 1 and Figure 2, this structure can reduce the flow-reversing impingement that pressurized gas caused in the blower work, thereby reduce vibration and noise.

Impeller 2 is connected on the impeller shaft by interference fit, need not process keyway on the impeller shaft, thereby has improved the intensity of axle, and the centering precision of impeller 2 also is increased simultaneously.

Other technologies are same as the prior art.

Claims

1, a kind of novel L series Roots blower, it comprises casing, be installed in the impeller and the fixing impeller shaft of impeller in the casing; It is characterized in that: impeller is three leaf involute-types; Suction port, relief opening on the casing are spiral line type; It between impeller and the impeller shaft interference fit.