CN207438609U - The rotary drive structure of rotary regenerative air preheater soot blower - Google Patents

Abstract

The utility model provides a rotary driving structure of a soot blower for a rotary air preheater, which belongs to the field of environmental protection equipment and includes a first sprocket, a second sprocket, a motor and a positioning assembly, and the motor drives the first sprocket to rotate through a reducer , the first sprocket drives the second sprocket to rotate through the chain, the second sprocket is fixed on the injection assembly of the soot blower, the positioning assembly is arranged coaxially with the second sprocket and is rotationally connected with the injection assembly, the positioning assembly includes The positioning cylinder is equipped with two tapered roller bearings used in pairs and distributed at both ends. The middle part of the positioning cylinder is equipped with two deep groove ball bearings used in pairs. Or between adjacent deep groove ball bearings and tapered roller bearings, positioning rings and spacer sleeves are used for positioning. The utility model can realize the rotation of the blowing assembly, forms a blowing at a certain angle with the fan blade, and has better effect.

Description

Rotary Drive Structure of Sootblower Used in Rotary Air Preheater

technical field

The utility model belongs to the field of environmental protection equipment and relates to a high-pressure cleaning equipment, in particular to a rotary driving structure of a soot blower for a rotary air preheater.

Background technique

With the development of the economy, the damage to the environment is getting bigger and bigger, and the harm is becoming more and more obvious. Therefore, the country has higher and higher requirements for environmental protection. In recent years, all power plants and heating companies will be required to sell out of thermal power units. The transformation changed the operating conditions of the air preheater, which brought some problems of ash blocking and corrosion, and even affected the operation of the entire boiler. The cold end of the air preheater will be blocked due to excessively high sulfur content in coal, excessive ammonia escape rate, and abnormally low temperature weather. In this case, the problem of blockage of the air preheater must be solved. The usual modification is to install high-pressure water on-line washing at the cold end of the air pre-heater. The online washing efficiency is low and there are potential safety hazards. If the machine is shut down for cleaning, the cost is too high .

Utility model content

The problem to be solved by the utility model is to provide a rotary driving structure for a sootblower which is used inside a rotary air preheater and has high safety and stable performance.

In order to solve the above technical problems, the technical solution adopted by the utility model is: the rotary drive structure of the soot blower for the rotary air preheater, including the first sprocket, the second sprocket, the motor and the positioning assembly, and the motor is decelerated The engine drives the first sprocket to rotate, the first sprocket drives the second sprocket to rotate through the chain, the second sprocket is fixed on the blowing assembly of the soot blower, the positioning assembly is connected to the second sprocket The two sprockets are coaxially arranged and connected to the injection assembly in rotation. The positioning assembly includes a positioning cylinder, and two tapered roller bearings used in pairs are arranged in the positioning cylinder and distributed at both ends. The middle part is provided with two deep groove ball bearings used in pairs, and the adjacent deep groove ball bearings or the adjacent deep groove ball bearings and the tapered roller bearings are positioned by positioning rings and spacers set up.

Further, the pitch diameter ratio of the first sprocket to the second sprocket is 1:2.

Further, the output speed of the motor after passing through the reducer is 1 revolution per minute.

Further, it also includes a base, the base includes a bottom plate, the two ends of the upper surface of the bottom plate are vertically provided with a first support column and a second support column, the reducer is fixed on the first support column, the The positioning assembly is fixed on the second supporting column, and the height of the second supporting column is smaller than that of the first supporting column.

Further, an escape cavity is provided at the lower end of the second support column.

Further, the motor is controlled by a frequency converter.

Further, the outer surfaces of the first sprocket and the second sprocket are provided with wear-resistant layers.

Further, the speed reducer is a multi-stage worm gear speed reduction structure.

Compared with the prior art, the utility model has the advantages and positive effects: 1. The utility model tapered roller bearing can withstand radial force and axial force, and can ensure smooth rotation. After the assembly is completed, it can also It bears the radial force of the blowing assembly and cooperates with the deep groove ball bearing to ensure the smooth rotation of the axial direction. The connection of the whole structure is more stable and reliable to ensure the rotation of the blowing assembly. After the motor passes through the reducer, the speed is reduced and the speed is greatly improved. 2. The reducer adopts a multi-stage worm gear reduction structure, which can be set with a large proportion of reduction ratio to meet the needs of slow and accurate rotation, and greatly improves the torque; 3. Setting the frequency converter makes speed adjustment more convenient and makes The control program is simpler and more practical.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the structural schematic diagram of the rotary drive structure of the rotary air preheater of the present invention sootblower;

Fig. 2 is a structural schematic diagram of the positioning assembly of the utility model.

Reference signs:

21-positioning seat; 211-base plate; 212-first support column; 213-second support column; 214-avoidance cavity; 22-motor; 23-reducer; 24-first sprocket wheel; 25-chain; 26-second sprocket; 27-positioning assembly; 271-positioning cylinder; 272-tapered roller bearing; 273 positioning ring; 274-spacer sleeve; 275-deep groove ball bearing; 28-frequency converter.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention. Novel and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the utility model. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention through specific situations.

Specific embodiments of the present utility model are described in detail below in conjunction with accompanying drawings.

As shown in Figures 1 and 2, the utility model is a rotary drive structure for a soot blower for a rotary air preheater, including a first sprocket 24, a second sprocket 26, a motor 22 and a positioning assembly 27, and the motor 22 passes through The reducer 23 drives the first sprocket 24 to rotate, the first sprocket 24 drives the second sprocket 26 to rotate through the chain, the second sprocket 26 is fixed on the blowing assembly of the soot blower, the positioning assembly 27 and the second sprocket 26 is coaxially arranged and connected with the blowing assembly. The positioning assembly 27 includes a positioning cylinder 271. Two tapered roller bearings 272 used in pairs are arranged in the positioning cylinder 271 and are distributed at both ends. The middle part of the positioning cylinder 271 is provided with There are two deep groove ball bearings 275 used in pairs, between adjacent deep groove ball bearings 275 or between adjacent deep groove ball bearings tapered roller bearings 272 are positioned by positioning ring 273 and spacer sleeve 274, and the tapered roller bearings The sub-bearing 272 can bear radial force and axial force, and can ensure smooth rotation. After the assembly is completed, it can also bear the radial force of the blowing assembly. At the same time, it cooperates with deep groove ball bearings to ensure smooth axial rotation. The connection of the entire structure is more stable and reliable to ensure the rotation of the blowing assembly. After the motor 22 passes through the reducer 23, the speed is reduced and the torque is greatly improved.

Preferably, the pitch circle diameter ratio of the first sprocket 24 and the second sprocket 26 is 1:2; more preferably, the output speed of the motor 22 after passing through the reducer is 1 revolution per minute, both structures reduce the ratio Speed, after using it together, it ensures that the blowing assembly rotates 180 degrees in one minute. Under the action of high-pressure blowing, this speed can ensure the stability of the structure, and cooperate with the self-propagation of the fan blades to complete the effect of blowing and cleaning; more preferred Specifically, the motor 22 is controlled by a frequency converter 28, and different frequencies are set according to different cleaning conditions, the speed regulation is safer and faster, and the program control is simpler.

Preferably, a base 21 is also included. The base 21 includes a bottom plate 211. The two ends of the upper end surface of the bottom plate 211 are vertically provided with a first support column 212 and a second support column 213. The reducer is fixed on the first support column 212. The positioning assembly 27 Be fixed on the second support column 213, the height of the second support column 213 is less than the height of the first support column 212, has guaranteed the integrity of two sprocket installations like this, the transmission of chain 25 is more stable and reliable, the second support column The low height is conducive to the fixed connection with the lower end of the blowing assembly, which saves space and makes the connection stable.

Preferably, the lower end of the second support column 213 is provided with an escape cavity 214, which is convenient for installing a high-pressure water pump.

Preferably, both the outer surfaces of the first sprocket 24 and the second sprocket 26 are provided with wear-resistant layers, so as to increase the service life of the sprockets.

One of the multiple specific embodiments of the present invention is as follows: the height of the second support column 213 is 275mm, the height of the first support column 212 is 620mm, the height of the positioning cylinder 271 is 375mm, the motor 22 is an electric motor, The speed reducer 23 is a multi-stage worm gear reduction structure, which can be provided with a large specific speed to increase the torque.

In the actual use process, the parts are installed as shown in the figure, the lower end of the blowing assembly of the soot blower is set in the positioning assembly 27 and the two are connected in rotation, and the second sprocket 26 is fixedly connected with the blowing assembly , the motor 22 can be started to drive the injection assembly to rotate. The frequency of the frequency converter can be adjusted according to the actual injection situation, and the adjustment can be made through the control center. The whole structure is simple. At the same time, two sets of bearings are used to ensure the axial bearing capacity. It also ensures smooth rotation in the radial direction, stable connection, and convenient speed adjustment to achieve stable rotation of the blowing assembly, which is safe and reliable.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (8)

1. the rotary drive structure of rotary regenerative air preheater soot blower, it is characterised in that：Including the first sprocket wheel (24), second Sprocket wheel (26), motor (22) and positioning component (27), the motor (22) drive the first sprocket wheel (24) to revolve by speed reducer (23) Turn, first sprocket wheel (24) is rotated by the second sprocket wheel (26) described in chain drive, and second sprocket wheel (26), which is fixed on, blows On the injection component of grey device, the positioning component (27), which is coaxially disposed with second sprocket wheel (26) and is rotated with injection component, to be connected It connects, the positioning component (27) includes positioning tube (271), and the two circular cones rolling used in pairs is equipped in the positioning tube (271) Sub- bearing (272) and both ends are distributed in, the middle part in the positioning tube (271) is equipped with two deep groove ball bearings used in pairs (275), taper roll bearing between the adjacent deep groove ball bearing (275) or described in the adjacent deep groove ball bearing (272) set between by locating ring (273) and spacer sleeve (274) positioning.

2. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Institute The pitch ratio for stating the first sprocket wheel (24) and second sprocket wheel (26) is 1:2.

3. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Institute Output speed of the motor (22) after the speed reducer (23) is stated as 1 rpm.

4. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Also Including pedestal (21), the pedestal (21) includes bottom plate (211), and the both ends of bottom plate (211) upper surface are vertically equipped with first Support column (212) and the second support column (213), the speed reducer (23) is fixed on first support column (212), described fixed Hyte part (27) is fixed on second support column (213), and the height of second support column (213) is less than described first The height of dagger (212).

5. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 4, it is characterised in that：Institute State the second support column (213) lower end be equipped with keep away a cavity (214).

6. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Institute Motor (22) is stated to control by frequency converter (28).

7. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Institute The outer surface for stating the first sprocket wheel (24) and second sprocket wheel (26) is equipped with wearing layer.

8. the rotary drive structure of rotary regenerative air preheater soot blower according to claim 1, it is characterised in that：Institute Speed reducer (23) is stated as multistage turbine worm speed-down structure.