CN216714809U

CN216714809U - Guide vane adjusting structure and flow adjusting device

Info

Publication number: CN216714809U
Application number: CN202220195710.4U
Authority: CN
Inventors: 潘洪涛; 谭明忠; 邹洪富; 崔从鹤; 张洪伟
Original assignee: Tianjin Feixuan Technology Co ltd
Current assignee: Tianjin Feixuan Technology Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-10
Anticipated expiration: 2032-01-24

Abstract

The application provides a stator is adjusted structure and flow control device relates to flow control equipment field. The guide vane adjusting structure is applied to a flow adjusting device and comprises a guide vane body, a synchronous transmission mechanism and a driving mechanism; the guide vane body comprises a valve seat and a preset number of guide vanes, and the guide vanes are rotatably arranged on the valve seat and positioned in an inner cavity of the valve seat; the synchronous transmission mechanism is arranged on the valve seat and comprises bevel gear transmission components and synchronous linkage components, wherein each guide vane is correspondingly provided with one bevel gear transmission component, the bevel gear transmission components are connected with the corresponding guide vanes, and the synchronous linkage components are connected with all the bevel gear transmission components; the driving mechanism is arranged on the shell of the flow regulating device and connected with one bevel gear transmission component. The application provides a stator is adjusted the structure and is made guide blade aperture control more accurate, has reduced the error that the transmission produced.

Description

Guide vane adjusting structure and flow adjusting device

Technical Field

The application relates to the field of flow regulating equipment, in particular to a guide vane regulating structure and a flow regulating device.

Background

Fluid machines (such as blowers, air compressors, refrigerant compressors, etc.) typically require flow regulation to match different operating conditions. The general method is to adjust the rotation speed of the motor through a frequency converter to achieve the purpose of flow rate adjustment. However, the frequency converter generally has a flow regulation range of 70% -110%, and if the rotating speed is further reduced downwards, problems such as surging and the like are easy to occur. Therefore, the Inlet flow can be regulated and controlled through Inlet Guide Vanes (IGV, Inlet Guide Vanes), and the regulation of the flow within the range of 10% -100% can be realized through the cooperation of the Inlet flow and the frequency conversion. This allows a greater working range of the fluid machine, which not only saves energy but also allows a more flexible use of the device.

The inlet guide vane needs to perform phase angle regulation and control on the opening degree of the guide vane according to control logic, however, the opening degree of the guide vane in the existing inlet guide vane structure is usually realized by transmitting torque through a motor or an actuator. The following three common ways of transmitting torque are used: (1) the slide block is driven by the stepping motor and the thread, and the guide vane is driven to rotate by the rolling bearing; (2) the transmission mode of a worm wheel and a worm is adopted; (3) and an actuator and a steel wire rope.

However, in the three ways of transmitting the torque, when the guide vane phase is controlled, because all the transmission parts have the play, the guide vane angle control is not accurate due to the accumulation of the play, so that deviation is easy to occur in the process of transmitting the torque, and the flow control is different from a theoretical value.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a stator is adjusted structure and flow control device for solve the not enough that exists among the prior art.

In order to achieve the above object, in a first aspect, the present application provides a guide vane adjusting structure applied to a flow adjusting device, where the guide vane adjusting structure includes a guide vane body, a synchronous transmission mechanism, and a driving mechanism;

the guide vane body comprises a valve seat and a preset number of guide vanes, and the guide vanes are rotatably arranged on the valve seat and positioned in an inner cavity of the valve seat;

the synchronous transmission mechanism is arranged on the valve seat and comprises a bevel gear transmission assembly and a synchronous linkage assembly, wherein each guide vane is correspondingly provided with one bevel gear transmission assembly, the bevel gear transmission assemblies are connected with the corresponding guide vanes, and the synchronous linkage assembly is connected with all the bevel gear transmission assemblies;

the driving mechanism is arranged on a shell of the flow regulating device and connected with one bevel gear transmission assembly, and the driving mechanism can drive the corresponding bevel gear transmission assembly to rotate so as to link all the synchronous linkage assemblies through the synchronous linkage assemblies to synchronously drive the corresponding guide vanes to rotate.

With reference to the first aspect, in one possible implementation manner, the bevel gear transmission assembly includes a bearing seat, a transmission shaft, and a bevel gear set, the bearing seat is disposed on an outer wall of the valve seat, the transmission shaft is rotatably disposed in the bearing seat, the bevel gear set respectively connects the guide vane and the transmission shaft, and the bevel gear set includes two mutually meshed bevel gears;

the synchronous linkage assembly is connected with one end, far away from the bevel gear set, of the transmission shaft.

With reference to the first aspect, in a possible implementation manner, the synchronous linkage assembly includes a chain and transmission sprockets, wherein one transmission sprocket is disposed on each transmission shaft, the chain sequentially connects all the transmission sprockets, and an inner side of the chain is engaged with the transmission sprockets.

With reference to the first aspect, in a possible implementation manner, the synchronous transmission mechanism further includes a first tensioning assembly, the first tensioning assembly includes a first tensioning support, a first tensioning arm support, and a tensioning sprocket, the first tensioning support is disposed on an outer wall of the valve seat, the first tensioning arm support is fixed on the first tensioning support through a bolt, the tensioning sprocket is rotatably disposed on the first tensioning arm support, and the tensioning sprocket abuts against and engages with an inner side of the chain.

In combination with the first aspect, in a possible implementation manner, the synchronous linkage assembly includes a synchronous belt and a driving pulley, wherein each of the driving shafts is provided with one of the driving pulleys, the synchronous belt sequentially connects all of the driving pulleys, and the inner side of the synchronous belt is engaged with the driving pulleys.

With reference to the first aspect, in a possible implementation manner, the synchronous transmission mechanism further includes a second tensioning assembly, the second tensioning assembly includes a second tensioning support, a second tensioning arm support and a tensioning pulley, the second tensioning support is disposed on the outer wall of the valve seat, the second tensioning arm support is fixed on the second tensioning support through a bolt, the tensioning pulley is rotatably disposed on the second tensioning arm support, and the tensioning pulley is abutted against and engaged with the inner side of the synchronous belt.

With reference to the first aspect, in one possible implementation manner, the guide vane includes a vane body and a rotating shaft connected to the vane body, wherein the rotating shaft is rotationally matched with the valve seat through a teflon sliding bearing.

With reference to the first aspect, in a possible implementation manner, the driving mechanism is connected with one bevel gear in the bevel gear transmission assembly, and the driving mechanism can drive the guide vane to rotate through the bevel gear.

With reference to the first aspect, in a possible implementation manner, the driving mechanism includes a driving motor and an input shaft, the driving motor is disposed on the casing, one end of the input shaft is connected to the driving motor, the other end of the input shaft penetrates through the casing and is in rotation-stopping fit with the bevel gear, the input shaft and the casing are in dynamic sealing fit, and the driving motor is a stepping motor or a servo motor.

In a second aspect, the present application further provides a flow regulating device, including a casing and a guide vane regulating structure as provided in the first aspect, the guide vane regulating structure being disposed in the casing.

Compare in prior art, the beneficial effect of this application:

the application provides a guide vane adjusting structure and a flow adjusting device, wherein the guide vane adjusting structure is applied to the flow adjusting device and comprises a guide vane body, a synchronous transmission mechanism and a driving mechanism; the guide vane body comprises a valve seat and a preset number of guide vanes, and the guide vanes are rotatably arranged on the valve seat and positioned in an inner cavity of the valve seat; the synchronous transmission mechanism is arranged on the valve seat and comprises a bevel gear transmission assembly and a synchronous linkage assembly, wherein each guide vane is correspondingly provided with one bevel gear transmission assembly, the bevel gear transmission assemblies are connected with the corresponding guide vanes, and the synchronous linkage assembly is connected with all the bevel gear transmission assemblies; the driving mechanism is arranged on the shell of the flow regulating device and is connected with one bevel gear transmission component. In the guide vane adjusting structure provided by the application, the driving mechanism can drive the corresponding bevel gear transmission assembly to rotate, and the corresponding guide vanes can be synchronously driven to rotate by all the synchronous linkage assemblies through the synchronous linkage assemblies, so that the flow is adjusted. The utility model provides a stator is adjusted structure has adopted bevel gear drive assembly to carry out power transmission to realize the synchro control of all guide vanes by the synchronous linkage subassembly, realize the accurate control of guide vane aperture through the cooperation of gear engagement drive mode and synchronous linkage subassembly, the error that reducible transmission produced. The flow regulating device is applied to a flow regulating device, and the driving mechanism is positioned outside the shell, so that the maintenance is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a partial schematic structural diagram of a flow rate regulation device provided in an embodiment of the present application;

fig. 2 is a partial schematic view illustrating a three-dimensional structure of a guide vane adjusting structure according to an embodiment of the present application;

FIG. 3 shows an enlarged partial schematic view at A in FIG. 1;

fig. 4 shows a partial schematic structural view of another guide vane adjusting structure according to an embodiment of the present application.

Description of the main element symbols:

100-a housing; 200-a vane body; 210-a valve seat; 220-guide vanes; 221-a blade body; 222-a shaft; 223-Teflon slide bearings; 300-synchronous drive mechanism; 310-bevel gear drive assembly; 311-a bearing seat; 312-a drive shaft; 313-bevel gear set; 3130-bevel gears; 320-a synchro-link assembly; 320 a-a sprocket linkage assembly; 321-a chain; 322-a drive sprocket; 330-a first tensioning assembly; 331-a first tensioning mount; 332-a bolt; 333-a first tensioning arm support; 334-a tensioning sprocket; 400-a drive mechanism; 410-a drive motor; 420-input shaft.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present embodiment provides a guide vane adjusting structure, which is applied to a flow adjusting device and can be used to adjust the flow of a fluid at an inlet of a duct.

The guide vane adjusting structure provided by the present embodiment includes a guide vane body 200, a synchronous transmission mechanism 300 and a driving mechanism 400. The synchronous transmission mechanism 300 is arranged on the guide vane body 200, the driving mechanism 400 is arranged on the casing 100 of the flow regulating device, the driving mechanism 400 is connected with the synchronous transmission mechanism 300, and the driving mechanism 400 transmits power to the guide vane body 200 through the synchronous transmission mechanism 300 so as to control the opening degree of the guide vane body 200, control the flow of the fluid and achieve the purpose of flow regulation.

Referring to fig. 1 and 2, the guide vane body 200 includes a valve seat 210 and a predetermined number of guide vanes 220, the guide vanes 220 are rotatably disposed in the valve seat 210 and an inner cavity of the valve seat 210, wherein the inner cavity of the valve seat 210 is an overflow channel, and the size of the overflow channel can be adjusted by rotating the guide vanes 220 to change the angle of the guide vanes 220, thereby adjusting the flow rate.

Alternatively, a predetermined number of guide vanes 220 are evenly distributed circumferentially along the valve seat 210. The number of the guide vanes 220 can be designed according to actual requirements, and is also influenced by the diameter of the inner cavity of the valve seat 210, so that the number of the guide vanes 220 is not limited in the present embodiment.

Further, the guide vane 220 comprises a vane body 221 and a rotating shaft 222 connected to the vane body 221, wherein the rotating shaft 222 is rotatably engaged with the valve seat 210 through a teflon sliding bearing 223. Because the teflon sliding bearing 223 has the self-lubricating function, the rotating shaft 222 is prevented from being abraded under the condition of no lubricating oil, and the wear resistance is greatly improved.

The synchronous transmission mechanism 300 is disposed on the valve seat 210, and is connected to the rotating shafts 222 of all the guide vanes 220, so as to drive all the vane bodies 221 to rotate synchronously.

Specifically, the synchronous transmission mechanism 300 includes a bevel gear transmission assembly 310 and a synchronous linkage assembly 320. In the embodiment, the number of the bevel gear assemblies 310 corresponds to the number of the guide vanes 220, wherein each guide vane 220 is correspondingly provided with one bevel gear assembly 310, the bevel gear assemblies 310 are connected with the corresponding rotating shafts 222, and the synchronous linkage assembly 320 is connected with all the bevel gear assemblies 310, so that the motions of all the bevel gear assemblies 310 can be kept synchronous.

Referring to fig. 2 and 3, the bevel gear assembly 310 includes a bearing seat 311, a transmission shaft 312 and a bevel gear set 313, the bearing seat 311 is disposed on an outer wall of the valve seat 210, and a bearing is disposed in the bearing seat 311. The transmission shaft 312 is rotatably disposed in the bearing housing 311 and engaged with the bearing. The bevel gear set 313 is respectively connected with the rotating shaft 222 and the transmission shaft 312, in this embodiment, the bevel gear set 313 includes two bevel gears 3130 engaged with each other, wherein one bevel gear 3130 is connected with the transmission shaft 312 and is in running fit with the transmission shaft 312; the other bevel gear 3130 is connected to the corresponding rotating shaft 222 and is in non-rotating engagement with the rotating shaft 222.

Alternatively, the rotation-stopping fit may include a flat key fit, a spline fit, an interference fit, etc., and it should be understood that the above description is only illustrative and not intended to limit the scope of the present application.

Referring to fig. 2 and 3, a synchronous linkage assembly 320 is connected to an end of the transmission shaft 312 away from the bevel gear set 313, wherein the synchronous linkage assembly 320 is a sprocket linkage assembly 320a or a synchronous belt linkage assembly.

In some embodiments, the synchronous linkage assembly 320 is a sprocket linkage assembly 320a, the sprocket linkage assembly 320a includes a chain 321 and a driving sprocket 322, and the number of the driving sprocket 322 corresponds to the number of the driving shafts 312. Wherein, each transmission shaft 312 is provided with a transmission chain wheel 322, and the transmission chain wheel 322 is in running fit with the transmission shaft 312. The chain 321 is connected to all the driving sprockets 322 in turn, and the inner side of the chain 321 is engaged with the driving sprockets 322. Therefore, the chain 321 can drive all the transmission chain wheels 322 to rotate, and further drive all the transmission shafts 312 to rotate synchronously.

Referring to fig. 4, the sprocket linkage assembly 320a further includes a first tensioning assembly 330, the first tensioning assembly 330 includes a first tensioning seat 331, a first tensioning arm 333, and a tensioning sprocket 334, the first tensioning seat 331 is disposed on the outer wall of the valve seat 210, the first tensioning arm 333 is fixed on the first tensioning seat 331 by a bolt 332, the tensioning sprocket 334 is rotatably disposed on the first tensioning arm 333, and the tensioning sprocket 334 abuts against and engages with the inner side of the chain 321. When the chain 321 is loosened after long-term use, the first tensioning arm support 333 can be rotated towards the direction close to the chain 321 by screwing the bolt 332 connecting the first tensioning arm support 333 and the first tensioning support 331, and then the abutting force between the tensioning sprocket 334 and the chain 321 is adjusted, so that the chain 321 is kept in a tensioned state.

Alternatively, in order to improve the compactness of the sprocket linkage assembly 320a after installation, the first tensioning support 331 and the tensioning sprocket 334 are respectively located at the installation gaps at two sides of one of the driving sprockets 322, the first tensioning arm support 333 is of a bent arm structure, and an escape space is formed between the bent portion and the valve seat 210 so as to avoid interference with the driving shaft 312.

In other embodiments, the synchronous linkage assembly 320 is a synchronous belt linkage assembly including synchronous belts and driving pulleys, and the number of the driving pulleys corresponds to the number of the driving shafts 312. Wherein, all be equipped with a driving pulley on every transmission shaft 312, all driving pulleys are connected in proper order to the hold-in range, and the inboard and the driving pulley meshing of hold-in range. Therefore, the timing belt can drive all the tension sprockets 334 to rotate, and further drive all the transmission shafts 312 to rotate synchronously.

The synchronous belt linkage assembly further comprises a second tensioning assembly, the second tensioning assembly comprises a second tensioning support, a second tensioning arm support and a tensioning belt wheel, the second tensioning support is arranged on the outer wall of the valve seat 210, the second tensioning arm support is fixed on the second tensioning support through a bolt 332, the tensioning belt wheel is rotatably arranged on the second tensioning arm support, and the tensioning belt wheel is abutted against and meshed with the inner side of the synchronous belt. The structural scheme of the second tensioning assembly can refer to the arrangement of the first tensioning assembly 330, and the tensioning principle is the same as that of the first tensioning assembly 330, which is not described herein again.

It can be understood that the chain wheel linkage assembly 320a or the synchronous belt linkage assembly can avoid the play existing in the transmission after tensioning, so that the synchronism is better and the control is more accurate.

Referring to fig. 1 and 2, the driving mechanism 400 is disposed on the casing 100 of the flow rate adjusting device and connected to one of the bevel gear transmission assemblies 310, and the driving mechanism 400 can drive the corresponding bevel gear transmission assembly 310 to rotate, so that all the synchronous linkage assemblies 320 can be linked to synchronously drive the corresponding guide vane 220 to rotate through the synchronous linkage assembly 320.

Specifically, the driving mechanism 400 includes a driving motor 410 and an input shaft 420, and the driving motor 410 is disposed on the casing 100. One end of the input shaft 420 is connected to the driving motor 410, and the other end thereof penetrates through the housing 100 and is connected to one bevel gear 3130 of the bevel gear transmission assembly 310, and the driving motor 410 can drive the corresponding guide vane 220 to rotate through the bevel gear 3130, and simultaneously drive all the guide vanes 220 to rotate synchronously through the synchronous linkage assembly 320. Wherein the input shaft 420 is in rotational engagement with the bevel gear 3130. The input shaft 420 is in dynamic sealing engagement with the casing 100 to prevent fluid leakage from the engagement of the input shaft 420 with the casing 100.

Further, in the present embodiment, the input shaft 420 is indirectly connected to the bevel gear 3130 on the rotating shaft 222 through the rotating shaft 222.

Optionally, the driving motor 410 is a stepping motor or a servo motor, and the selection of the stepping motor or the servo motor further improves the control accuracy.

The guide vane adjusting structure provided by the embodiment adopts the bevel gear transmission assembly 310 to transmit power, the synchronous linkage assembly 320 is used for realizing synchronous control of all the guide vanes 220, the precise control of the opening degree of the guide vanes 220 is realized through the matching of a gear meshing transmission mode and the synchronous linkage assembly 320, and errors generated by transmission can be reduced.

Referring to fig. 1, a flow rate adjusting device is further provided in the present embodiment. The flow regulating device comprises a casing 100 and the guide vane regulating structure provided above, the guide vane regulating structure is arranged in the casing 100, and the casing 100 can protect the synchronous linkage assembly 320. Since the driving motor 410 is disposed outside the cabinet 100, maintenance is more convenient.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A guide vane adjusting structure is applied to a flow adjusting device and is characterized by comprising a guide vane body, a synchronous transmission mechanism and a driving mechanism;

the driving mechanism is arranged on the casing of the flow regulating device and connected with one bevel gear transmission assembly, and the driving mechanism can drive the corresponding bevel gear transmission assembly to rotate so as to link all the synchronous linkage assemblies to synchronously drive the corresponding guide blades to rotate through the synchronous linkage assemblies.

2. The guide vane adjusting structure according to claim 1, wherein the bevel gear transmission assembly comprises a bearing seat, a transmission shaft and a bevel gear set, the bearing seat is disposed on an outer wall of the valve seat, the transmission shaft is rotatably disposed in the bearing seat, the bevel gear set respectively connects the guide vane and the transmission shaft, and the bevel gear set comprises two mutually meshed bevel gears;

3. The guide vane adjusting structure according to claim 2, wherein the synchronous linkage assembly comprises a chain and a driving sprocket, wherein each driving shaft is provided with one driving sprocket, the chain is sequentially connected with all the driving sprockets, and the inner side of the chain is meshed with the driving sprockets.

4. The guide vane adjusting structure according to claim 3, wherein the synchronous transmission mechanism further comprises a first tensioning assembly, the first tensioning assembly comprises a first tensioning support, a first tensioning arm support and a tensioning sprocket, the first tensioning support is arranged on the outer wall of the valve seat, the first tensioning arm support is fixed on the first tensioning support through a bolt, the tensioning sprocket is rotatably arranged on the first tensioning arm support, and the tensioning sprocket abuts against and engages with the inner side of the chain.

5. The guide vane adjusting structure according to claim 2, wherein the synchronous linkage assembly comprises a synchronous belt and a driving pulley, wherein each of the driving shafts is provided with one driving pulley, the synchronous belt is sequentially connected with all the driving pulleys, and the inner side of the synchronous belt is engaged with the driving pulleys.

6. The guide vane adjusting structure of claim 5, wherein the synchronous transmission mechanism further comprises a second tensioning assembly, the second tensioning assembly comprises a second tensioning support, a second tensioning arm support and a tensioning pulley, the second tensioning support is disposed on the outer wall of the valve seat, the second tensioning arm support is fixed on the second tensioning support through a bolt, the tensioning pulley is rotatably disposed on the second tensioning arm support, and the tensioning pulley abuts against and engages with the inner side of the synchronous belt.

7. The guide vane adjusting structure according to claim 1, wherein the guide vane comprises a vane body and a rotating shaft connected with the vane body, wherein the rotating shaft is rotationally fitted with the valve seat through a teflon sliding bearing.

8. The guide vane adjustment structure according to claim 1, characterized in that the drive mechanism is connected with one of the bevel gears in the bevel gear transmission assembly, the drive mechanism being capable of driving the guide vane to rotate via the bevel gear.

9. The guide vane adjusting structure according to claim 8, wherein the driving mechanism includes a driving motor and an input shaft, the driving motor is disposed on the casing, one end of the input shaft is connected to the driving motor, the other end of the input shaft penetrates through the casing and is in rotation-stopping fit with the bevel gear, the input shaft and the casing are in dynamic sealing fit, and the driving motor is a stepping motor or a servo motor.

10. A flow regulating device comprising a casing and a guide vane regulating structure as claimed in any one of claims 1-9, said guide vane regulating structure being disposed within said casing.