Centrifugal fan air outlet structure

Abstract

The utility model relates to a centrifugal fan air outlet structure is located in centrifugal fan air outlet position, include: adjusting baffle subassembly, electric hydraulic push rod, air pressure sensor, shaft sleeve type rotary encoder and controller, adjusting baffle subassembly includes rotatable setting in centrifugal fan air outlet inside pivot and one side edge fixed setting baffle on pivot, shaft sleeve type rotary encoder fixed settings in centrifugal fan air outlet, and pivot sleeve sets up in shaft sleeve type rotary encoder, electric hydraulic push rod fixed connection in centrifugal fan air outlet inside side wall, electric hydraulic push rod other end is provided with the roller, the roller abuts at baffle surface, air pressure sensor sets up baffle, and located baffle on one side edge away from the shaft sleeve, above each electronic component between cooperation connection. The centrifugal fan air outlet structure can intelligently adjust centrifugal fan air outlet size to maintain centrifugal fan air outlet pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal fan air volume regulation equipment, and in particular to a centrifugal fan air outlet structure. Background Technology

[0002] Combined heat and power (CHP) is a comprehensive energy utilization technology. A portion of the chemical energy from boiler combustion is converted into electricity, while the remaining heat is transported to where it is needed via centrifugal fans and pipelines. This effectively utilizes the latent heat of vaporization for heating, improving energy efficiency. CHP is characterized by significant diurnal variations in heat load. Specifically, the heating load is higher during the day, with the boiler operating at its rated load; while at night, the heating load is lower, with the boiler operating at 60%-70% of its rated load. This reduces the output heat from the boiler, causing a decrease in pressure at the centrifugal fan outlet. This can alter the dynamic-static clearance at the connection between the centrifugal fan outlet and the pipeline, leading to friction and damage to the connection structure. Insufficient pressure at the centrifugal fan outlet can also cause some hot air from the pipeline to backflow into the centrifugal fan for a short period, resulting in fan stall. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a centrifugal fan outlet structure that can intelligently adjust the size of the centrifugal fan outlet, thereby maintaining the centrifugal fan outlet pressure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A centrifugal fan outlet structure, disposed at the centrifugal fan outlet position, includes: an adjusting baffle assembly, an electro-hydraulic push rod, a pressure sensor, a bushing-type rotary encoder, and a controller;

[0006] The adjusting baffle assembly includes a rotating shaft rotatably disposed inside the air outlet of the centrifugal fan, and a baffle fixed on one side of the rotating shaft.

[0007] The sleeve-type rotary encoder is fixedly installed inside the air outlet of the centrifugal fan, and the rotating shaft is sleeved inside the sleeve-type rotary encoder.

[0008] The electro-hydraulic push rod is fixedly connected to the inner side wall of the centrifugal fan outlet, and a roller is provided at the other end of the electro-hydraulic push rod, with the roller abutting against the surface of the baffle.

[0009] The air pressure sensor is mounted on the baffle and is located on the side of the baffle away from the bushing;

[0010] The electro-hydraulic push rod, the pneumatic sensor, and the bushing-type rotary encoder are electrically connected to the controller.

[0011] Furthermore, the baffle plate is provided with multiple shock-absorbing through holes spaced apart.

[0012] Furthermore, the surface of the baffle is covered with a layer of sound-absorbing nanomaterials.

[0013] Furthermore, this also includes touch display devices;

[0014] The touch display device is electrically connected to the controller.

[0015] Furthermore, this also includes audible and visual alarms;

[0016] The audible and visual alarm is electrically connected to the controller.

[0017] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0018] This centrifugal fan outlet structure uses a baffle plate at the outlet position, which is rotated by an electro-hydraulic push rod. A shaft-mounted rotary encoder detects the baffle's rotation angle and displays it on a touchscreen. The rotation angle of the baffle indicates the airflow volume from the centrifugal fan outlet. When the total airflow of the centrifugal fan remains constant, a smaller outlet size results in higher air pressure; conversely, a larger outlet size results in lower air pressure. Therefore, when the boiler load decreases, the centrifugal fan power decreases accordingly, and the total airflow decreases. Adjusting the baffle to narrow the outlet size maintains a constant air pressure at the outlet. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a circuit connection block diagram of this utility model. Detailed Implementation

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0023] refer to Figure 1 , Figure 2 and Figure 3This embodiment provides a centrifugal fan outlet structure, which is located at the centrifugal fan outlet position of the centrifugal fan 100. The centrifugal fan 100 is existing equipment, and those skilled in the art should understand the centrifugal fan outlet position referred to in this embodiment, which will not be described in detail here. This centrifugal fan outlet structure is used to adjust the size of the centrifugal fan outlet, or in other words, the actual air volume of the centrifugal fan outlet after being blocked by the baffle 11.

[0024] The centrifugal fan outlet structure includes: an adjusting baffle assembly 1, an electro-hydraulic push rod 2, a roller 3, a pressure sensor 4, a shaft sleeve rotary encoder 5, a controller 6, a touch screen display 7, and an audible and visual alarm 8.

[0025] The electro-hydraulic actuator 2, pneumatic sensor 4, bushing rotary encoder 5, controller 6, touch screen 7, and audible and visual alarm 8 mentioned above are all existing electronic devices in the art. Those skilled in the art should understand the conventional selection of the above electronic devices. Preferably, in this specific embodiment, the controller 6 is a Siemens S7-200 programmable controller.

[0026] The adjusting baffle assembly 1 includes a rotating shaft 10 rotatably disposed inside the air outlet of the centrifugal fan, and a baffle 11 fixedly disposed on one side of the rotating shaft 10.

[0027] The baffle 11 is provided with multiple damping through holes spaced apart (not shown in the figure, but those skilled in the art should understand the location of the damping through holes), and the surface of the baffle 11 is covered with a sound-absorbing nanomaterial layer (not shown in the figure). The sound-absorbing nanomaterial layer can be a sound-absorbing coating or sound-insulating cotton, etc. On the one hand, the damping through holes can reduce wind resistance; on the other hand, the damping through holes, together with the sound-absorbing nanomaterial layer covering the surface of the baffle 11, can reduce noise. When the total air volume of the centrifugal fan 100 remains constant, the increased shielding area of ​​the baffle 11 makes the centrifugal fan outlet smaller, thus increasing the air pressure through the centrifugal fan outlet; conversely, adjusting the baffle 11 to decrease the shielding area makes the centrifugal fan outlet larger, thus decreasing the air pressure through the centrifugal fan outlet.

[0028] The sleeve-type rotary encoder 5 is fixedly installed inside the air outlet of the centrifugal fan, and the rotating shaft 10 is sleeved inside the sleeve-type rotary encoder 5; the rotation angle of the baffle 11 is detected by the sleeve-type rotary encoder 5 and displayed on the touch screen 7.

[0029] The electro-hydraulic push rod 2 is fixedly connected to the inner side wall of the centrifugal fan outlet. The roller 3 is located at the other end of the electro-hydraulic push rod 2 and abuts against the surface of the baffle 11. The electro-hydraulic push rod 2 pushes the baffle 11 to rotate. Due to the wind pressure on the surface of the baffle 11, the baffle 11 will press tightly against the roller 3.

[0030] The pressure sensor 4 is mounted on the baffle 11 and located on the side of the baffle 11 away from the bushing 10. The pressure sensor 4 detects the air pressure passing through the centrifugal fan outlet and displays it on the touch screen 7.

[0031] The electric hydraulic push rod 2, the air pressure sensor 3, the bushing rotary encoder 5, the touch screen 7, and the audible and visual alarm 8 are electrically connected to the controller 6.

[0032] When in use, when the boiler load decreases, the power of the centrifugal fan 100 decreases accordingly, and the total air volume of the centrifugal fan 100 decreases. At this time, the electric hydraulic push rod 2 is controlled to adjust the baffle 11 to make the air outlet of the centrifugal fan smaller, thereby maintaining the air pressure through the air outlet of the centrifugal fan at a certain value.

[0033] If, after adjustment, the air pressure at the centrifugal fan outlet still cannot be maintained at a certain value, the controller 6 will control the audible and visual alarm 8 to issue an alarm, reminding staff to perform maintenance.

[0034] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A centrifugal fan outlet structure, disposed at the outlet position of the centrifugal fan, characterized in that, include: Adjustable baffle assembly, electro-hydraulic push rod, pneumatic sensor, bushing rotary encoder, and controller; The adjusting baffle assembly includes a rotating shaft rotatably disposed inside the air outlet of the centrifugal fan, and a baffle fixed on one side of the rotating shaft. The sleeve-type rotary encoder is fixedly installed inside the air outlet of the centrifugal fan, and the rotating shaft is sleeved inside the sleeve-type rotary encoder. The electro-hydraulic push rod is fixedly connected to the inner side wall of the centrifugal fan outlet, and a roller is provided at the other end of the electro-hydraulic push rod, with the roller abutting against the surface of the baffle. The air pressure sensor is mounted on the baffle and is located on the side of the baffle away from the bushing; The electro-hydraulic push rod, the pneumatic sensor, and the bushing-type rotary encoder are electrically connected to the controller.

2. The centrifugal fan outlet structure according to claim 1, characterized in that: The baffle plate is provided with multiple shock-absorbing through holes spaced apart.

3. The centrifugal fan outlet structure according to claim 1 or 2, characterized in that: The surface of the baffle is covered with a layer of sound-absorbing nanomaterials.

4. The centrifugal fan outlet structure according to claim 1, characterized in that: It also includes touch display devices; The touch display device is electrically connected to the controller.

5. The centrifugal fan outlet structure according to claim 1, characterized in that: It also includes audible and visual alarms; The audible and visual alarm is electrically connected to the controller.

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