Induced draft fan axial thrust control system

Abstract

To improve a service life of an induction ventilation fan bearing.SOLUTION: This invention discloses an induction ventilation fan axial direction thrust control system. The system comprises: a temperature adjustment unit including a cooling module and a heating module to adjust temperature of a cavity in which an induction ventilation fan transmission shaft is arranged; a switch unit for switching the cooling module and the heating module; a displacement measuring unit measuring target displacement which is axial displacement of the induction ventilation fan transmission shaft and sending the target displacement; and a controller for receiving the target displacement, and generating a switch command for instructing a switch operation of the switch unit according to the target displacement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of induced draft fans, and in particular to an axial thrust control system for induced draft fans. Regarding the system. [Background technology]

[0002] The boiler induced draft fan bearing consists of two parts: the support bearing and the thrust bearing, and the support shaft The bearing supports the radial weight of the induced draft fan impeller, and the thrust bearing supports the shaft of the induced draft fan impeller. The load borne by the support bearing is constant and the operating life is long, but the thrust bearing The axial thrust is too large, so it is often damaged and has a short service life. Due to excessive forward thrust, stress fatigue holes were generated on the dynamic and static contact surfaces of the thrust bearing of the induced draft fan. At the same time, the axial thrust of the induced draft fan is too large and the induced draft fan is too long. The induction draft fan, whose boiler stationary blades are adjustable in relation to the transmission shaft of the The adjustable device is disposed in front of the induced draft fan impeller, so that the induced draft fan impeller The distance between the drive unit and the transmission shaft becomes longer. The longer the shaft, the greater the thermal expansion and contraction in the axial direction. The expansion becomes large, and the thrust shaft is subjected to large stress due to the axial expansion, causing fatigue holes, and the shaft This could result in damage to the receiver. The current technical means is that when the fan transmission shaft is installed, there is an induction ventilation fan between the transmission shaft and the bearing. There is a reserved clearance to eliminate the thermal expansion of the long shaft inside, but the induction fan is operated The amount of shaft expansion during operation changes depending on the environmental temperature, so the reserved clearance is In some cases, negative thrust due to low-temperature contraction of the transmission shaft may occur. , along with the normal operating thrust generated by the load on the fan impeller, the induced draft fan bearing This will worsen the damage. Summary of the Invention

[0003] The purpose of this section is to provide an overview of some aspects of the present invention and some preferred implementations. The following examples are briefly described. This section and the abstract and title of the specification of this application are incorporated by reference in their entirety. Some parts may be abbreviated or omitted in order to avoid ambiguity in the purpose of the abstract and title. Such simplifications or omissions do not limit the scope of the present invention. In view of the above and other problems in the prior art, the present invention is proposed. Therefore, an object of the present invention is to provide an induction ventilation fan with an axial direction that is controlled by controlling the amount of expansion of the transmission shaft due to temperature. Control the thrust force, improve the service life of the induced draft fan bearing, and extend the service life of the induced draft fan and (c) providing an induced draft fan axial thrust control system for further extending the . In order to solve the above technical problems, the present invention provides the following technical solutions: The fan axial thrust control system controls the temperature of the cavity in which the induced draft fan transmission shaft is located. The temperature control unit includes a cooling module and a heating module. To, a switching unit used to switch between the cooling module and the heating module; To measure the target displacement, which is the axial displacement of the induced draft fan transmission shaft, and transmit the target displacement The displacement measuring unit used; A switching command for receiving a target displacement and instructing a switching operation of a switching unit according to the target displacement. and a controller used to generate the command. As a preferred embodiment of the induced draft fan axial thrust control system of the present invention, a controller teeth, a receiving module for receiving a target displacement; a calculation module for determining an axial expansion amount as a function of a target displacement; a comparison module for comparing the amount of axial expansion with a preset threshold value; an instruction module for generating a switching command in response to a comparison result; The switching command generated by the instruction module is used to control the switching operation of the switching unit. Used for. In a preferred embodiment of the induced draft fan axial thrust control system of the present invention, the comparison results show that If the directional expansion amount is greater than a preset threshold, the switching command activates the cooling module. When the cooling module is started, the axial expansion amount gradually decreases, and the axial expansion When the amount is equal to the preset threshold, the switching command is to shut down the cooling module; If the axial expansion amount is smaller than the preset threshold, the switching command is When the heating module is started, the axial expansion gradually increases. When the axial expansion amount is equal to a preset threshold, the switching command is issued to shut down the heating module. This is to The preset threshold is zero. In a preferred embodiment of the induced draft fan axial thrust control system of the present invention, The zero position is for both the positive and negative directions when the induced draft fan thrust bearing is in a cold state. The center point of the area receiving zero force, and the positive direction is the direction in which the expansion of the induction ventilation fan transmission shaft increases. The negative direction is the direction in which the expansion of the induced draft fan transmission shaft decreases. As a preferred embodiment of the induced draft fan axial thrust control system of the present invention, a controller The present invention further includes a manually controllable transmitting module, and the transmitting module is configured to receive a preset switching command. This is used to send the command to a specified terminal device and have the operator perform the switching operation. As a preferred embodiment of the induced draft fan axial thrust control system of the present invention, a temperature monitoring unit The temperature monitoring unit further includes a temperature sensor for detecting a temperature of the cavity in which the induction draft fan transmission shaft is disposed. It is used to collect temperature data and store the temperature data. As a preferred embodiment of the induced draft fan axial thrust control system of the present invention, includes cold air components, The heating module includes a heating component. In a preferred embodiment of the induced draft fan axial thrust control system of the present invention, the switching unit comprises: , a frame part, a power supply part provided on an upper surface of the frame part, and a power supply part connected to the frame part. A driving part and a lifting part connected to the driving part, The frame part includes a bottom plate, two sets of first sliding grooves symmetrically provided on the bottom plate, and a pair of first sliding grooves fixedly connected to the bottom plate. a side plate having a bottom plate and a fixed rack fixedly connected to the side plate, The power supply components consist of two symmetrically arranged power supplies, a protective shell connected to the power supplies, and a protective A first spring fixedly connected to the shell, a fixed plate fixedly connected to the side plate, and a spring passing through the fixed plate a live post fixed to the the power source includes a first power source and a second power source; The drive component is fixedly connected to the bottom plate through a first threaded post, which is screwed into the first threaded post. a first rotating member fixedly connected to the first rotating member; a first fixed post, a switching member rotatably connected to the fixed rack, and a switchable member engageable with the switching member; a locking member connected to the The first rotating member includes a first rotating post and a first drive wheel fixedly connected to a bottom end of the first rotating post. , The switching member includes a second rotating column, a rotating disk fixedly connected to the second rotating column, and a second rotating column. a rotating rod fixedly connected to the The locking member includes an eccentric ring, a pressing member connected to one end of the eccentric ring, and a locking member having one end connected to the pressing member. A second spring is fixedly connected, and two crank plates are fixedly and symmetrically mounted on a fixed rack. and a rotating shaft simultaneously connected to the two crank plates, The pressing member includes a pressing portion, a connecting portion fixedly connected to the pressing portion, and a locking member fixedly connected to the connecting portion. Including the joint, The lifting component includes a drive chain, a second drive wheel connected to the drive chain in a transmissible manner, and a second drive A third rotating post fixedly connected to the wheel; a second threaded post screwed into the second driving wheel; a lifting member contacting an upper surface of the wheel; The lifting member is made up of two second fixed columns symmetrically arranged on the top surface of the bottom plate. A lift plate that penetrates the lift plate, a third fixed column fixed symmetrically to the top surface of the lift plate, and a fixed connection to the third fixed column. The insulating block is connected to the substrate, and a conductive post is fixed through the insulating block. In a preferred embodiment of the induced draft fan axial thrust control system of the present invention, the switching unit comprises: , further comprising a protective moving part; The protective moving part includes a protective member and a moving member movably connected to the protective member; The protective member includes a protective case, a second slide groove and a third slide groove that are symmetrically provided on the protective case, A first sliding plate is provided slidably in the second sliding groove, The frame parts, power supply parts, drive parts and lifting parts are all installed inside the protective member. , The moving member includes a second sliding plate slidably provided in the third sliding groove, and a second sliding plate fixed to the lower surface of the second sliding plate. and a telescopic drawbar fixedly mounted on the side wall of the protective case. nothing. In a preferred embodiment of the induced draft fan axial thrust control system of the present invention, the first power supply is a cooling The first power supply is used to power the power module, and the second power supply is used to power the heating module. do. Effect of the Invention

[0004] The present invention has the following beneficial effects: The amount of axial expansion is determined according to the position, and the amount of axial expansion is compared with a preset threshold value to issue a command mode. The switching operation of the switching unit can be directly controlled via the switching commands generated by the switching module. The transmission module transmits a switching command to the operator to execute the switching operation, and the induced ventilation fan The cooling or heating of the cavity in which the transmission shaft is located is adjusted, and the cooling or heating This controls the amount of expansion of the induced draft fan transmission shaft, and further reduces the axial thrust caused by the expansion, and To improve the service life of ventilation fan bearings and further extend the service life of induced draft fans can be done. [Brief description of the drawings]

[0005] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following description of the embodiments will be given. The accompanying drawings, which should be used in conjunction with the present invention, will be briefly described below. The drawings are merely some examples of the present invention, and a person skilled in the art can easily understand the drawings without any creative effort. Based on these drawings, other accompanying drawings can be obtained. [Figure 1] FIG. 2 is a frame diagram showing the structure of an induced draft fan axial thrust control system. [Diagram 2] 1 is a flow chart showing the structure of an induced draft fan axial thrust control system. [Diagram 3] FIG. 2 is a frame diagram showing the structure of a temperature adjustment unit. [Figure 4] FIG. 2 is a schematic diagram showing the overall structure of a switching unit. [Diagram 5] FIG. 4 is a plan view showing the internal structure of the switching unit. [Figure 6] 2 is a schematic diagram of the overall internal structure of the protective case. FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0006] In order to make the above objects, features and advantages of the present invention more clear and understandable, the following detailed description is given. Specific embodiments of the present invention will now be described in detail in conjunction with the accompanying drawings of the present specification. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in other forms than those described herein, and those skilled in the art will recognize that the spirit and scope of the present invention is not limited to the above-described embodiments. The same can be achieved without departing from the scope of the present invention, and the present invention is directed to the specific embodiments disclosed below. The present invention is not limited to the illustrative examples. Furthermore, "one embodiment" or "embodiment" herein refers to at least one embodiment of the present invention. The term "a" or "an" as used in various places in this specification refers to a particular feature, structure, or characteristic that may be included in one embodiment. The phrase "in an embodiment" does not always refer to the same embodiment, but rather to a separate embodiment from other embodiments. nor does it refer to mutually exclusive embodiments in any particular order. Example 1 Referring to FIG. 1 to FIG. 3, a first embodiment of the present invention is an induced draft fan axial thrust control system. and controlling the amount of expansion of the transmission shaft due to temperature to control the axial thrust of the induced draft fan. Improve the service life of induced draft fan bearings and further extend the service life of induced draft fans It is possible. Specifically, the induced draft fan axial thrust control system includes an induced draft fan transmission shaft disposed on the The cooling module 201 and the heating module 202 are used to adjust the temperature of the cavity. A temperature adjustment unit 200 including a temperature adjusting valve 202; A switching unit used to switch between the cooling module 201 and the heating module 202. Knit 100 and To measure the target displacement, which is the axial displacement of the induced draft fan transmission shaft, and transmit the target displacement The displacement measuring unit 300 used, receiving a target displacement and instructing a switching operation of the switching unit 100 in response to the target displacement; and a controller 400 used to generate the switching commands. The displacement measuring unit 300 is attached to the end of the transmission shaft close to the bearing. Includes a measuring device. Further, the controller 400 a receiving module 401 for receiving a target displacement; A calculation module 402 for determining an axial expansion amount as a function of a target displacement; A comparison module 403 for comparing the axial expansion amount with a preset threshold value; and an instruction module 404 for generating a switching command in response to the comparison result; The switching command generated by the instruction module 404 controls the switching operation of the switching unit 100. Used to control. The operation flow of the controller 400 is as follows: 2- Comparison module 403- Instruction module 404. Furthermore, if the comparison result shows that the axial expansion amount is greater than a preset threshold value, the switching command is The cooling module 201 is started, and when the cooling module 201 is started, the axial When the axial expansion amount is gradually decreased and the axial expansion amount is equal to the preset threshold value, the switching command is and stopping the stop module 201. If the axial expansion amount is smaller than the preset threshold, the switching command is When the heating module 202 is activated, the axial expansion amount The amount of axial expansion gradually increases, and when it is equal to the preset threshold, a switching command is sent to the heating module. The purpose of this is to stop the service 202. The preset threshold is zero. If the amount of axial expansion is greater than 0, the cooling module 201 is started to If the amount is equal to 0, the cooling module 201 is stopped, and if the amount of axial expansion is less than 0, If the axial expansion amount is equal to 0, start the heating module 202. Stop 02. Furthermore, the zero position of the axial expansion is the positive displacement when the induced draft fan thrust bearing is in a cold state. The positive direction is the center of the area receiving zero force in both the positive and negative directions. The negative direction is the direction in which the expansion of the transmission shaft of the induced draft fan increases, and the negative direction is the direction in which the expansion of the transmission shaft of the induced draft fan decreases. It is. In addition, the controller 400 further includes a transmission module 405. 405 transmits a switching command to a preset terminal device and causes an operator to execute a switching operation. Used for: Furthermore, the temperature monitoring unit 500 is further provided. The temperature monitoring unit 500 is To collect temperature data of the cavity in which the fan transmission shaft is located and store the temperature data. Used. Furthermore, the cooling module 201 includes a cooling component 201a, The heating module 202 includes a heating component 202a. In addition, the cooling part 201a and the heating part 202a are both provided with an induction ventilation fan transmission shaft. It is used to adjust the temperature of the cavity, i.e. to adjust the amount of expansion of the transmission shaft and By controlling the thrust bearing, the service life of the thrust bearing can be further extended, and at the same time, the cooling part 201a and The heating element 202a is realized by any known technology and will not be described in detail here. In use, the displacement measurement unit 300 measures and collects a target displacement and computes the target displacement. The controller 400 receives the target displacement from the receiver module 401. The calculation module 402 receives the target displacement and calculates and determines the amount of axial expansion according to the target displacement. Module 403 compares the amount of axial expansion to a preset threshold. If the comparison result is that the axial expansion amount is greater than the preset threshold, the instruction module 404 generates a switching command, where the switching command is to start the cooling module 201. , directly controls the switching operation of the switching module 100 or is controlled by the transmission module 405. This command is sent to a preset terminal to notify the operator of the execution of the switching operation, and further The cooling part 201a cools the cavity in which the induction ventilation fan transmission shaft is disposed, and the cooling , the axial expansion amount gradually decreases, and when the axial expansion amount is equal to the preset threshold value, the switching The command is to stop the cooling module 201, and the comparison result is that the axial expansion amount is preset. If the difference is less than the set threshold, the command module 404 generates a switch command, where The switching command is to activate the heating module 202, and the switching operation of the switching module 100 The operation is directly controlled or the command is sent to a pre-defined terminal by the sending module 405. to notify the operator to execute the switching operation, and further, the heating element 202a is an induction draft fan. The cavity in which the transmission shaft is located is heated, and the amount of axial expansion gradually increases as a result of the heating. When the axial expansion amount is equal to the preset threshold, the switching command stops the heating module 202. The axial displacement is always kept within a reasonable distance, and the induced draft fan bearing At the same time, the temperature monitoring unit 500 is located in the cavity in which the transmission shaft is arranged. The temperature data is constantly monitored and stored, allowing the operator to check the operating status of the induction fan. You can spot problems and prevent them before they occur. In summary, the induced draft fan axial thrust control system has the following beneficial effects: The amount of axial expansion is determined according to the target displacement collected by the roller 400, and the amount of axial expansion is By comparing with a preset threshold value, the switching operation of the switching unit 100 is controlled. or by transmitting a switching command to an operator via the transmission module 405 to cause the operator to perform a switching operation; The induction ventilation fan realizes the cooling or heating adjustment of the cavity where the transmission shaft is located, and the cooling or The expansion amount of the induction ventilation fan transmission shaft is controlled by heating, and the axial thrust caused by the expansion is further reduced. This reduces the load on the induced draft fan bearings, improving their service life and further extending the service life of the induced draft fan. It can be extended.

[0007] Example 2 Referring to FIG. 4 to FIG. 7, the second embodiment of the present invention shows a specific structure of the switching unit 100. The other parts are the same as those in the first embodiment. The cooling module 2 is provided by the switching unit 100. The switching between the heating module 201 and the heating module 202 can be realized structurally. Specifically, the switching unit is provided on the upper surface of the frame part 101. A power supply component 102, a driving component 103 connected to the frame component 101, and a driving component a lifting component 104 connected to 103; The frame part 101 includes a bottom plate 101a and two pairs of first sliding members symmetrically provided on the bottom plate 101a. A groove 101b, a side plate 101c fixedly connected to the bottom plate 101a, and a side plate 101b fixedly connected to the bottom plate 101a. The fixed rack 101d includes two horizontal The horizontal plates include a first horizontal plate 101d-1 and a second horizontal plate 101d-2. The flat plate 101d-1 is provided directly above the second horizontal plate 101d-2. The second horizontal plate 101d-2 is fixedly connected via a connection block 101d-3. 01d-2 is fixedly connected to the bottom plate 101a via a connecting post 101d-4, The power supply component 102 has two power sources 102a arranged symmetrically. a first spring 102c fixedly connected to the protective shell 102b; A fixed plate 102d is fixedly connected to the plate 101c, and a The first spring 102c includes a current-carrying post 102e and is symmetrically and uniformly arranged along the same horizontal line. The springs may be distributed in a plurality of locations. The power source 102a includes a first power source 102a-1 and a second power source 102a-2. The dimensions of the power source 102a and the protective shell 102b are adapted to the dimensions of the sliding groove 101b. The power source 102a and the protective shell 102b can move horizontally along the length of the sliding groove 101b. One end of the first spring 102c is fixedly connected to the protective shell 102b, and the other end is fixed to the side plate 101c. Constantly connected, The drive component 103 includes a first threaded post 103a fixedly connected to the bottom plate 101a, a first screw A first rotating member 103b is screwed into a screwed post 103a. The handle 103c is fixedly connected to the first rotating member 103b. The first fixed post 103 is screwed into the first rotating member 103b. d, a switching member 103e rotatably connected to the fixed rack 101d, and a switching member 10 a lock member 103f engageably connected to the first fixed post 103e; 103f-231 is provided and a female screw is formed, and the first rotating member 103b is fixed to the first fixed column 10 3d, and the first rotating member 103b is rotated vertically along the first fixed post 103d. At the same time, the first rotating members 103b are each movable in the first threaded post 103. a and the first fixed post 103d are screwed into each other in the same manner, and when the handle 103c is rotated, the first The rolling members 103b are vertically spaced at equal intervals along the first threaded post 103a and the first fixed column 103d. It can move vertically, The first rotating member 103b is a first rotating column 103b-1, and a bottom end of the first rotating column 103b-1. The first drive wheel 103b-2 is fixedly connected to the first drive wheel 103b-2, and the first drive wheel 103b-2 is provided with a female thread. The female threads on the first drive wheel 103b-2 are fitted to the first threaded post 103a, and the handle When the wheel 103c is rotated, the first rotating column 103b-1 and the first driving wheel 103b-2 are both can move vertically along a first threaded post 103a; In the original state, the first rotating column 103b-1 is connected to the first horizontal plate 101d-1 and the second horizontal plate 101d-2, and the first rotating column 103b-1 passes through the first threaded post 103a and the second threaded post 103b-2. The first drive wheel 103b-2 is screwed into the second horizontal plate 101d-2 at the same time. Located below. The switching member 103e is fixedly connected to the second rotating column 103e-1. A rotating disk 103e-2 and a rotating rod 103 fixedly connected to a second rotating column 103e-1. e-3, the second rotating column 103e-1 penetrates the first horizontal plate 101d-1, and In this case, there is no vertical displacement, and the second rotating column 103e-1 is rotated horizontally only along the through hole. height, The rotating disk 103e-2 is provided above the first horizontal plate 101d-1, and the rotating rod 10 3e-3 is provided between the first horizontal plate 101d-1 and the second horizontal plate 101d-2, and the rotating rod 103 When the second rotating column 103e-3 makes a circular motion around the second rotating column 103e-1, the rotating column 103e-3 comes into contact with the The rotating rod 103e-3 does not rotate beyond the connecting block 101d-3, and the rotating rod 103e-3 is connected to the two power sources. The rotating disk 102a can be maintained in contact with and out of contact with the protective shell 102b. The same notches are uniformly distributed around the circumference of the disk 103e-2, and the locking member 103f is fixed to the disk 103e-2 through the notches. The horizontal rotation of the rotating disk 103e-2 is locked. Preferably, the rotating rod 103e-3 has a horizontal step at one end thereof that contacts the protective shell 102b. The arcuate step is provided (for better and more stable contact with the protective shell 102b, and the first spring 102c can be pressed gradually, and the force becomes stable and uniform. When the first spring 102c is pressed by contact, the pressing force is uniformly transmitted to the first spring 102c. At the same time, the power source 102a and the protective shell 102b are compressed by the first spring 102c. The power supply end of 2a is just connected to the current-carrying post 102e, and the rotating rod 10 By adjusting the rotation direction of 3e-3, the cooling module 201 or heating element of a different power supply 102a can be The function of supplying power to the thermal module 202 can be achieved. The lock member 103f is connected to an eccentric ring 103f-1 at one end thereof. a pressing member 103f-2, one end of which is fixedly connected to the pressing member 103f-2; f-3, two crank plates 103 fixedly and symmetrically provided on the fixed rack 101d f-4, and a rotating shaft 103f- connected simultaneously to the two crank plates 103f- 5, the center of gravity of the eccentric ring 103f-1 is close to one side of the pressing member 103f-2, The diameter of the ring on the side closer to 103f-2 is smaller than that of the handle 103c, but the diameter of the pressing member 103f- The diameter of the ring at one end of 2 is larger than the size of the handle 103c, and the handle 103c is rotated. When the handle 103c is moved vertically downward together with the first rotating column 103b-1, the eccentric One side of the ring 103f-1 is pressed, and the eccentric ring 103f-1 moves downward at an incline. The second spring 103f-3 is compressed. The pressing member 103f-2 is fixedly connected to the pressing portion 103f-21. A connection portion 103f-22, and an engagement portion 103f-2 fixedly connected to the connection portion 103f-22 3, one end of the second spring 103f-3 is fixedly connected to the connecting portion 103f-22, and the other end of the second spring 103f-3 is fixedly connected to the connecting portion 103f-22. The horizontal plate 101d-1 is fixed to the upper surface of the horizontal plate 101d-1, and an opening is provided in the engagement portion 103f-23. The rotation axis 103f-5 passes through the opening, The two opposing side walls of the engagement portion 103f-23 are respectively connected to the two crank plates 1 03f-4, and at the same time, the rotating shaft 103f-5 connects them. When the second spring 103f-3 is compressed, the engaging portion 103f-23 rotates in an arc shape. The portion 103f-23 is finally disengaged from the notch, and the rotating disk 103e- of the locking member 103f Achieve rotation unlock for 2. Preferably, the eccentric ring 103f-1 is used to manually rotate the handle 103c. This can reduce the time required to easily unlock the locking member 103f, and further, the first rotating column 103 When the rotation of the handle 103c is stopped via the screw b-1, the lock member 103f automatically The lock function can be realized, and the unlock function can be realized by continuously pressing the pressing portion 103f-21 with an external force. This can save time and reduce costs without requiring a function to be achieved. The lifting part 104 is connected to a drive chain 104a in a transmissible manner. a second driving wheel 104b fixedly connected to the second driving wheel 104b; a third rotating post 104e fixedly connected to the second driving wheel 104b; A second threaded post 104c is screwed into the drive wheel 104b, and the top surface of the second drive wheel 104b. The third rotating post 104e includes a lifting member 104d that contacts the second driving wheel 104b. At the same time, it can be raised and lowered along the second threaded rod 104c. The second drive wheel 104b is threaded into the second threaded post 104c. The wheel 103b-2 is similar to a screw that is screwed into the first threaded post 103a, and the first When the screw of the driving wheel 103b-2 is raised and lowered, the second driving wheel 1 04b is moved vertically up and down along a second threaded post 104c, and then The member 104d is raised and lowered. The lifting member 104d is made up of two second fixed columns 104d symmetrically provided on the upper surface of the bottom plate 101a. -1, a lift plate 104d-2 provided to penetrate two second fixed columns 104d-1 at the same time, The third fixed columns 104d-3 and 104d-4 are fixed symmetrically to the upper surface of the lower plate 104d-2. d-3, and an insulating block 104d-4 is fixedly connected to the insulating block 104d-3. The lower surface of the lift plate 104d-2 includes a conductive pole 104d-5 fixed through the second drive wheel 10 4b, and when the second driving wheel 104b moves vertically up and down, the lift plate 104d-2 is lifted up and down. However, due to the restriction on the elevation of the lift plate 104d-2 of the second fixed column 104d-1, 4d-2 can only move vertically up and down, and both ends of the conductive pole 104d-5 are connected to the current-carrying post 102 at the same time. By simply touching the power supply 102a, the power of the power-carrying post 102 that is in contact with the power supply 102a is transferred to the corresponding power-carrying post 102a. 102 and supplies power to the temperature adjustment unit 200. Cut. In the original state, the lift plate 104d-2 is at the highest position, and both ends of the conductive block are Although each of them is in contact with the current-carrying post 102e, the rotating rod 103e-3 does not rotate, and the first bar The wire 102c is not compressed, i.e., the power source 102a is not in communication with the energized post 102e. Therefore, the power supply state to the temperature adjustment unit 200 is not realized. Preferably, in order to realize a power supply state to the temperature adjustment unit 200, the first spring 10 2c is compressed, and the power source 102a and the conductive post 102e are connected to each other, and at the same time, the lift plate 104d -2 rises to the highest position, and both ends of the conductive block are connected to the conductive posts 102e. If only one of the conditions is met, power supply will be realized. In other words, the present device can reduce accidents caused by accidentally touching the power supply. Furthermore, the switching unit 100 further comprises a protective moving part 105, The protective movable part 105 is connected to the protective member 105a and is movable with the protective member 105a. A moving member 105b is included. The protective member 105a is provided symmetrically on the protective case 105a-1 and the protective case 105a-2. The second slide groove 105a-2 and the third slide groove 105a-3 are slid into the second slide groove 105a-2. The second sliding groove 105a-2 includes a third sliding groove 105a-3. The protective case 105a-1 is located above the temperature adjusting unit 105a-3. Two openings are provided in the protective case 105a-1. The current-carrying post 102e, which communicates with the knit 200, is fixed through the opening, The first sliding plate 105a-4 slides in the second sliding groove 105a-2. Since a certain friction material is provided in the first sliding plate 105a-4, the first sliding plate 105a-4 is not driven by an external force. It will only slide if the switch is operated. The frame part 101, the power supply part 102, the driving part 103 and the lifting part 104 are all The protective member 105a is provided inside the protective member 105a, and the bottom plate 101a is attached to the inner bottom plate of the protective case 105a-1. The side plate 101c is fixedly connected to the inner wall of the protective case 105a-1, and the first sliding plate 101b is fixedly connected to the inner wall of the protective case 105a-1. The movable plate 105a-4 does not slide in the original state, and shields and protects the internal structure of the protective case 105a-1. This protects the device and further reduces accidents caused by touching it accidentally. The moving member 105b is a second sliding plate 105 provided slidably in the third sliding groove 105a-3. b-1, a movable wheel 105b-2 fixedly provided on the lower surface of the second sliding plate 105b-1, and A retractable drawbar 105b-3 is fixedly attached to the side wall of the protective case 105a-1, The second sliding plate 105b-1 slides in the third sliding groove 105a-3. A certain friction material is provided, and the second sliding plate 105b-1 is driven by an external force. Sliding motion, If the device needs to be moved, the second sliding plate 105 having the moving wheel 105b-2 is b-1 is inserted into the third sliding groove 105a-3 and slid, and the telescopic drawbar 105b-3 Note that by using the , it is easy to move the entire device. Furthermore, the first power source 102a-1 is used to supply power to the cooling module 201, and the second The power supply 102a-2 is used to supply power to the heating module 202 and can be switched on and off by the operator. When an execution command is received, the first sliding plate 105a-4 is moved and slid, and the handle 10 3c to unlock the switching member 103e, and rotate the second rotating column 103e-1. By doing so, the power source 102a and the conductive post 102e come into contact with each other, and the handle 103c is rotated in the reverse direction. Rotate the switch member 103e to lock it again, so that the whole device has a stable power supply capability. It becomes like this. If it is necessary to switch from the cooling module 201 to the heating module 202, 1. The sliding plate 105a-4 is moved and slid, and the handle 103c is rotated to operate the switching member 10 3e is unlocked, the rotating rod 103e-3 is rotated, and the first power source 102a-1 is removed from contact with the first power source 102a-1. Switch to contact with the second power source 102a-2, at which point the first power source 102a-1 is reset; The first power source 102a-1 is detached from the corresponding power post 102e, cutting off the power to the cooling component. At the same time, the rotating column compresses the first spring 102c connected to the second power source 102a-2, The second power source 102a-2 contacts the corresponding power-carrying post 102e to be energized, and the handle 103c is rotated in the opposite direction to lock the switching member 103e again, and at the same time, the conductive pillar 104d-5 is Then, the conductive pole 104d-5 is reset again, and both ends of the conductive pole 104d-5 are again in contact with the live post 102e, and the second live pole 104d-5 is reset again. 1. Providing power supply to the heating element 202b-1 of the source 102a-2, i.e., the cooling module 201 to the heating module 202. When in use, the device has the following operating conditions (the accompanying drawings show the cooling module 201 and Only the position of the current-carrying post 102e connected to the heating module 202 is shown. The communication between the corresponding cooling module 201 and the heating module 202 is not according to the prior art. (This can be achieved by First use state (original state): The lock member 103f locks the switching member 103e, and the power source 10 2a does not communicate with the conductive post 102e, and both ends of the conductive block are 102e, that is, the power supply state to the temperature adjustment unit 200 is realized. When the handle 103c is at the highest point, the first driving wheels 103b-2 are It is fixed by being screwed into the first threaded post 103a and the first fixed post 103d, and at the same time A second drive wheel 104b is also stationary and threaded onto a second threaded post 104c. The lift plate 104d-2 is also at the highest point, and the rotating rod 103e-3 is attached to the protective shell 102b. The conductive block is not in contact with the power supply 102a, and both ends of the conductive block are connected to the power supply posts 102e. 02a does not contact the power-carrying post 102e, and power supply to the temperature adjustment unit 200 is realized. It has not been done. Second use state: The locking member 103f releases the locking action on the switching member 103e, and the power The source 102a is not connected to the current-carrying post 102e, and the conductive block is lowered. Both ends of the conductive block are detached from the current-carrying posts 102e, i.e., the temperature adjustment unit 20 When the handle 103c is rotated by an external force, The handle 103c is connected to the first fixed post 103d together with the first rotating post 103b-1 by a first screw. During the downward movement, the eccentric ring 103f- 1 is pressed, the eccentric ring 103f-1 moves downward at an incline, and at the same time, the eccentric ring 10 3f-1 moves the pressing portion 103f-21 downward, further compressing the second spring 103f-3. The engaging portion 103f-23 moves in an arc shape with the rotation axis 103f-5 as the center point. 03f-23 is released from the notch (realizing the automatic locking state), that is, the rotating disk 1 At the same time, during the downward movement of the first rotating column 103b-1, the drive The second driving wheel 103b-2 rotates downward in synchronization with the downward rotation of the first driving wheel 103b-2 by the drive chain 104a. 104b is moved downward along the second screw, and the lift plate 104d-2 is further lowered, Both ends of the electric block are detached from the electric post 102e and connected to the temperature adjustment unit 200. However, power supply to these areas has not been realized. Third use state: the power source 102a is in communication with the conductive post 102e, and both ends of the conductive block are conductive. The post 102e is detached, i.e., the power supply state to the temperature adjustment unit 200 is realized. When the lock member 103f releases the lock of the switching member 103e, the At the same time, the second rotating column 103e-1 is rotated by the rotating disk 103e-2 and the rotating rod 10 3e-3 are rotated, and the rotating rod 103e-3 gradually comes into contact with one of the protective shells 102b. The horizontal section of the rotating rod 103e-3 completely contacts the protective shell 102b. However, when the first spring 102c is compressed to the maximum extent, it stops rotating, and at this time, the power source 102a At the same time, the power source 102a is connected to the power-carrying post 102e. The power supply 102a is energized by contacting the conductive block 102b, but both ends of the conductive block are still energizing posts. Since the temperature adjusting unit 200 is detached from the temperature adjusting unit 102e, power supply to the temperature adjusting unit 200 is not possible. In addition, the risk of accidents occurring due to the power supply 102a being completely energized once it is turned on is reduced. This further reduces electrical accidents caused by accidentally touching the switch. Fourth use state (power supply state): the power source 102a is connected to the power supply post 102e, and at the same time Both ends of the conductive block are connected to the current-carrying posts 102e, i.e., the temperature adjustment unit When the first spring 102c is compressed to the maximum, the power supply state to the power supply 200 is realized. The source 102a comes into contact with the conductive post 102e and is in communication with it. At this time, the handle 103c is rotated in the reverse direction. When the first rotating column 103b-1 is rotated, the first rotating column 103b-1 rises vertically and resets the eccentric ring 103f-1. During the reset process, the second spring 103f-3 is also reset synchronously, and the engagement portion 103 f-23 is again engaged with the notch and locked, further locking the rotating rod 103e-3. This ensures that one end of the rotating rod 103e-3 comes into stable contact with the protective shell 102b. That is, the power source 102a and the conductive post 102e are stably connected, and the handle 103 When the first rotating column 103b-1 is stably raised by rotating the first driving wheel 103b-2, moves vertically upward along first threaded post 103a while simultaneously rotating drive chain 104a This causes the second drive wheel 104b to move vertically upward in a synchronized manner along the second threaded post 104c. The lift plate 104d-2 is also moved vertically upward along the two second fixed columns 104d-1. , and then the insulating block 104d-4 and the conductive post 104d-5 are raised, and the handle 103c When the reset is completed by rotating the conductive block, both ends of the conductive block are connected to the conductive posts 102e. , and power supply to the temperature adjustment unit 200 is realized. When the entire device needs to be moved or transported, the second sliding plate with the moving wheels is inserted into the third sliding groove. Once inserted, the entire device can be moved using the telescoping push bar. In summary, the present invention provides a locking member 103f that can be used to lock or unlock the switching member 103e. At the same time, the self-locking function saves time and energy. By providing the switching member 103e, the power source 102a is connected to the current-carrying post 102e. Not only can the switching member 103e be moved to the open position to achieve the power supply function, but also The different directions of rotation of the first power source 102a supply power to the cooling module 201. Alternatively, the second power source 102b may supply power to the heating module 202, or the two power sources may be combined. The power supply state can be switched, and the operation is easy and convenient. Thus, the first rotating column 103b-1 is raised and lowered in synchronization with the lifting part 104. In addition, the conductive block can be connected to both ends of the conductive post 102e. Specifically, the power source 102a and the conductive post 102e are in communication with each other, and both ends of the conductive block and the conductive post 10 The temperature adjustment unit of the power source 102a is connected to the temperature adjustment unit of the power source 102b only when the two conditions of The power supply function to the device 200 is achieved, and if one of the conditions is met, Further reducing electrical accidents caused by operation, and preventing operation during the process of switching the power supply or power source 102a Improve the safety of the author, and protect the internal device by the protective part 105, and at the same time, the whole device It makes it easier to move and transport the body and reduces the manual labor required for transportation. The construction and arrangement of the present application as shown in the various different exemplary embodiments are merely exemplary. It is important to note that although some embodiments have been described in this disclosure, Those skilled in the art will be aware that, without materially departing from the novel teachings and advantages of the subject matter disclosed herein, Many modifications are possible (e.g. dimensions, scale, structure, shape and proportions of various elements, parameter values ​​(temperature, pressure, etc.), mounting and placement, material use, color, orientation changes, etc.) For example, any molded element may be composed of multiple parts or elements, The positions of the elements may be reversed or otherwise changed, and the characteristics of the independent elements The number and location of the components may be changed. Accordingly, all such changes are within the scope of the present invention. Any process or method steps may be modified according to alternative embodiments. The order of the steps can be changed or rearranged. The clause "functions" means that structures that perform the functions described in the text are merely structurally equivalent. However, equivalent structures are also contemplated without departing from the scope of the present invention. Other substitutions, modifications, variations and omissions to the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but can be carried out in accordance with the accompanying drawings. It also includes various modifications made without departing from the scope of the claims. Moreover, in order to simplify the description of the exemplary embodiments, not all features of an actual embodiment may be reproduced. It is possible that some features may not be described (i.e., features that are not relevant to the best mode for carrying out the invention). , or omit features that are not relevant to the realization of the present invention). It should be noted that during the development of a practical embodiment, such as any engineering or design project, Numerous specific embodiments may be determined. Such a development effort may be complex and time-consuming. However, those of ordinary skill in the art having the benefit of this disclosure will be able to determine such without undue experimentation. The development effort is a routine process of design, manufacturing and production. It should be noted that the above embodiments are only for illustrating the technical solutions of the present invention, and are not intended to be limiting. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that the present invention is not limited to the above-described embodiments. Modifications made to the technical solution of the present invention without departing from the spirit and scope of the solution. or equivalent replacements are all within the scope of the claims of the present invention.

Claims

1. 1. An induced draft fan axial thrust control system, comprising: The induction draft fan is used to adjust the temperature of the cavity in which the transmission shaft is located, and the cooling model A temperature adjustment unit (200) including a module (201) and a heating module (202) and, To switch between the cooling module (201) and the heating module (202) The switching unit (100) used, Measure a target displacement, which is an axial displacement of the induction draft fan transmission shaft, and transmit the target displacement. a displacement measuring unit (300) used for receiving the target displacement, and performing a switching operation of the switching unit (100) in response to the target displacement; A controller (400) used to generate a switching command to indicate Preparation, The controller (400) a receiving module (401) for receiving the target displacement; a calculation module (402) for determining an axial expansion amount in response to the target displacement; A comparison module (403) for comparing the axial expansion amount with a preset threshold value; and an instruction module (404) for generating the switching command in response to a comparison result; The switching command generated by the command module (404) is transmitted to the switching unit ( 100) to control the switching operation of When the comparison result indicates that the axial expansion amount is greater than the preset threshold value, the switching The switching command is to start the cooling module (201), and the cooling module (201 ) is activated, the axial expansion amount is gradually decreased, and the axial expansion amount is increased to the preset value. If the threshold is equal to the threshold value set in step S100, the switching command is to shut down the cooling module (201). the law of nature, When the comparison result indicates that the axial expansion amount is smaller than the preset threshold value, the switching The switching command is to activate the heating module (202), and the heating module (202 ) is activated, the axial expansion amount gradually increases, and the axial expansion amount becomes equal to the preset value. If the threshold is equal to the threshold value set in step S100, the switching command is to stop the heating module (202). the law of nature, The preset threshold is zero.

1. An induced draft fan axial thrust control system comprising:

2. The zero position of the axial expansion amount is the positive direction when the induced draft fan thrust bearing is in a cold state. The positive direction is the center point of the area receiving zero force in both the positive and negative directions, and the positive direction is the center point of the area receiving zero force in both the positive and negative directions. The negative direction is the direction in which the expansion of the induced draft fan transmission shaft increases, and the negative direction is the direction in which the expansion of the induced draft fan transmission shaft increases.

2. The axial thrust control of an induced draft fan according to claim 1, wherein the axial thrust is decreased. system.

3. The controller (400) further comprises a manually controllable transmission module (405). The transmission module (405) transmits the switching command to a preset terminal device.

2. The method according to claim 1, wherein the switch is used to allow an operator to execute the switching operation. The induced draft fan axial thrust control system.

4. The temperature monitoring unit (500) further includes a temperature monitoring unit (500). Collect temperature data of the cavity in which the ventilation fan transmission shaft is located, and record the temperature data. The axial thrust of the induced draft fan of claim 1 is used for storing the Control system.

5. The cooling module (201) includes a cold air component (201a), 4. The heating module (202) according to claim 3, further comprising a heating element (202a).

2. An induced draft fan axial thrust control system as described in claim 1.

6. The switching unit (100) includes a frame part (101), A power supply component (102) provided on the upper surface of the frame component (101), a drive circuit connected to the frame component (101), a lifting part (104) connected to the driving part (103), 、 The frame part (101) is provided symmetrically on the bottom plate (101a). Two sets of first sliding grooves (101b) are fixedly connected to the bottom plate (101a). 01c), and a fixed rack (101d) fixedly connected to said bottom plate (101a). 、 The power supply component (102) includes two power supplies (102a) symmetrically arranged. 2a) and a protective shell (102b) connected to said protective shell (102b). a first spring (102c) fixedly connected to the side plate (101c); 02d), and a current-carrying post (102e) fixed through the fixing plate (102d). Including, The power sources include a first power source (102a-1) and a second power source (102a-2); The drive element (103) comprises a first threaded post fixedly connected to the base plate (101a). (103a), a first rotating member (10) screwed into the first threaded post (103a). 3b), a handle (103c) fixedly connected to the first rotating member (103b), A first fixed column (103d) screwed into the first rotating member (103b), the fixed rack (10 1d), and a switching member (103e) rotatably connected to the switching member (103e) a locking member (103f) engageably connected to the The first rotating member (103b) includes a first rotating column (103b-1) and a first rotating column ( a first drive wheel (103b-2) fixedly connected to the bottom end of the first drive wheel (103b-1); The switching member (103e) includes a second rotating column (103e-1), a second rotating column (103e- a rotating disk (103e-2) fixedly connected to said second rotating column (103e- 1) a rotating rod (103e-3) fixedly connected to the The locking member (103f) includes an eccentric ring (103f-1), an eccentric ring (103 A pressing member (103f-2) connected to one end of the pressing member (103f- 2), a second spring (103f-3) fixedly connected to the fixed rack (101d) Two crank plates (103f-4) are provided symmetrically on the a rotating shaft (103f-5) connected to a plate (103f-4), The pressing member (103f-2) includes a pressing portion (103f-21), 1), and a connection part (103f-22) fixedly connected to said connection part (103f-22). A fixedly connected engagement portion (103f-23) is included, The lifting part (104) includes a drive chain (104a), a second drive wheel (104b) that is fixedly connected to the second drive wheel (104b); a third rotating column (104e) connected to the second driving wheel (104b); a post (104c), a lifting member (104b) that contacts the upper surface of the second driving wheel (104b); 4d), The lifting member (104d) is provided on the upper surface of the bottom plate (101a) symmetrically with respect to two third members. 2 fixed columns (104d-1), two lifting and lowering devices penetrating the second fixed columns (104d-1) simultaneously a third fixed column symmetrically fixed to the upper surface of the lift plate (104d-2); (104d-3), an insulating block (10 4d-4), and a conductive pillar (104d-4) fixed to the insulating block (104d-4).

6. The induced draft fan axial thrust control system according to claim 5, further comprising: Stem.

7. The switching unit (100) further comprises a protective moving part (105), The protective moving part (105) includes a protective member (105a), and the protective member (105a a moving member (105b) movably connected to the The protective member (105a) includes a protective case (105a-1), a protective case (105a- A second slide groove (105a-2) and a third slide groove (105a-3) are provided symmetrically on the first slide groove (105a-1), The first sliding plate (105a-4) is provided slidably in the second sliding groove (105a-2). fruit, The frame part (101), the power supply part (102), the driving part (103), and The lifting parts (104) are all provided inside the protective member (105a), The moving member (105b) is slidably provided in the third sliding groove (105a-3). A second sliding plate (105b-1), which is fixedly provided on the lower surface of the second sliding plate (105b-1) The movable wheel (105b-2) and the protective case (105a-1) are fixedly provided on the side wall of the protective case (105a-1).

7. The induction device according to claim 6, further comprising a telescopic drawbar (105b-3) attached to said drawbar. Ventilation fan axial thrust control system.

8. The first power source (102a-1) is used to supply power to the cooling module (201). The second power supply (102a-2) is used to supply power to the heating module (202).

8. The induced draft fan axial thrust control system according to claim 7.

Images