CN2215578Y

CN2215578Y - Electric secondary air door

Info

Publication number: CN2215578Y
Application number: CN 94239454
Authority: CN
Inventors: 王培学
Original assignee: YADA INSTRUMENT AND METER MACHINERY PLANT SHANGHAI
Current assignee: YADA INSTRUMENT AND METER MACHINERY PLANT SHANGHAI
Priority date: 1994-10-11
Filing date: 1994-10-11
Publication date: 1995-12-20
Anticipated expiration: 2004-10-11

Abstract

The utility model relates to an electric secondary air door which solves the problems of seizure phenomenon and poor opening linearity of the traditional air doors. The utility model comprises a motor, an air door casing and an air door, wherein the air door is fixed on a rotating shaft of the air door; the rotating shaft of the air door is fixedly sheathed with gear wheels of the air door; the motor is fixedly sheathed with driving gear wheels through a driving shaft; the driving gear wheels and the gear wheels of the air door are engaged with each other; the motor, the gear wheels of the air door and the driving gear wheels are arranged outside the air door casing. The utility model has the advantages of overcoming the seizure phenomena of the air door, reducing air feeding resistance and improving the opening linearity of the air door.

Description

Electric secondary air door

The utility model relates to a kind of electronic secondary air register, relates in particular to a kind of a kind of electronic secondary air register that is used on the heat power plant boiler, is used to control the size of boiler intake.

Traditional electronic secondary air register is the opening and closing of directly being controlled air door by motor by power transmission shaft or lever, its major defect is: because motor and executing agency all directly are contained on the air door housing, at high temperature work, lubrication oil in motor and the executing agency volatilizees easily, kills phenomenon and produce.In addition, because the similar shutter of door opening, thereby the air intake resistance is bigger, and energy consumption is increased.Again on the one hand, therefore relatively poor because motor directly drives air door at opening and closing process neutral line degree, that is, and the curve of door opening size and the ratio of intake size.

The purpose of this utility model is to provide a kind of motor and executing agency all not to be in electronic secondary air register on the air door.

The electronic secondary air register that provides a kind of air intake resistance less is provided another purpose of the present utility model.

Design of the present utility model is as follows: electronic secondary air register of the present utility model comprises motor, air door housing and is positioned at the air door of air door housing that described air door is fixed on the axle of the air door, is with the air door gear on described axle of the air door; Be fixed with travelling gear by power transmission shaft on the described motor, described travelling gear and described air door gear are meshing with each other, and described motor, air door gear and travelling gear all are arranged at outside the described air door housing.

Because electronic secondary air register of the present utility model is controlled by transmission mechanism between motor and air door, and motor and transmission mechanism are arranged on the housing, and motor can be worked at normal temperatures, has avoided killing phenomenon.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the sectional view along the A-A line of Fig. 1.

As depicted in figs. 1 and 2, electronic secondary air register of the present utility model comprises that housing 3, motor 1 and air door 41 and 42(are referred to as upper wind door 41 and lower wind door 42 respectively),

air door

41 and 42 is arranged in the housing 3, axial restraint has rotating shaft 51 and lower rotary shaft 52 on one respectively in the center of

air door

41 and 42, is installed with a upper wind door gear 61 and lower wind door gear 62 respectively at the end (this end is stretching out outside the air door housing 3) of last rotating shaft 51 and lower rotary shaft 52.

Be fixed with a power transmission shaft 7(in the rotating shaft of motor 1 or stretch out and form power transmission shaft 7 by the rotating shaft of motor 1), on power transmission shaft 7, be installed with a travelling gear 2, travelling gear 2 is meshing with each other with upper wind door gear 61 and lower wind door gear 62.When motor 1 drives travelling gear 2 rotations, by pitch wheel air

door rotating shaft

51 and 52 is rotated, thus the opening and closing of control air door.

From Fig. 1 and Fig. 2 as can be seen, motor 1 and transmission mechanism (comprising power transmission shaft 7, travelling gear 2, upper wind door gear 61,62) all are arranged on the air door housing 3, therefore, all work at normal temperatures, having overcome fully at high temperature works easily produces the defective of killing phenomenon.

In the present embodiment, exemplified the example that two pectinid doors are arranged.Can certainly adopt the structure of having only a pectinid door or many fans (as 3 fans, 4 fans) air door according to actual conditions, because their structural similarity no longer describes in detail following.

See also Fig. 2 again, the utility model has also been done improvement to the shape of air door, adopts the air door of wing (flowing water shape), reduces the air intake resistance greatly, thereby can cut down the consumption of energy.

In sum, because electronic secondary air register of the present utility model adopts gear drive, and the shape of having improved air door, thereby not only solved the problem of " killing ", and reduced the air intake resistance simultaneously, improved the linearity of opening and closing.

Claims

1, a kind of electronic secondary air register, comprise motor, air door housing and be positioned at the air door of air door housing, it is characterized in that, described air door is fixed in the air door rotating shaft, in described air door rotating shaft, be installed with the air door gear, be installed with travelling gear by power transmission shaft on the described motor, described travelling gear and described air door gear are meshing with each other, and described motor, air door gear and travelling gear all are arranged at outside the described air door housing.

2, motor secondary air register as claimed in claim 1 is characterized in that, described air door comprises upper wind door and lower wind door, is separately fixed on rotating shaft and the lower rotary shaft; Be with upper wind door gear and lower wind door gear respectively on rotating shaft and the lower rotary shaft on described; Described travelling gear and described upper wind door gear and lower wind door gear are meshing with each other.

3, motor secondary air register as claimed in claim 1 or 2 is characterized in that, described air door is wing.