Sealing device for fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a sealing device for a fan, which comprises an aluminum labyrinth sealing element, a labyrinth sealing temperature sensing element, a controller and a water supply mechanism, the aluminum labyrinth sealing element, a fan shaft and a bearing are coaxial, and the side surface, far away from the bearing, of the aluminum labyrinth sealing element is detachably connected with a casing. The aluminum labyrinth sealing element comprises a sealing element main body, a water tank is formed in the circumferential direction of the sealing element main body, a temperature sensing mounting hole is formed in the sealing element main body, the sealing element main body is detachably connected with the labyrinth sealing temperature sensing element through the temperature sensing mounting hole, and the aluminum labyrinth sealing element further comprises a water tank water inlet pipe and a water tank water outlet pipe. The water supply mechanism is respectively communicated with the water tank water inlet pipe and the water tank water outlet pipe; compared with the prior art, the utility model has the advantages and positive effects that the problem that an aluminum labyrinth sealing element is not easy to perceive is solved, the risk that heat of a casing is transferred to a bearing is reduced, and the safe operation of a fan is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and particularly relates to a sealing device for a fan. Background Art

[0002] Due to explosion-proof reasons, some fans generally require an aluminum labyrinth seal with comb teeth at the casing shaft seal position. This type of seal has two problems: first, in order to ensure the sealing effect, the gap between the fan shaft and the comb teeth is small. When the fan is running, the gap between the fan shaft and the comb teeth will change due to various unpredictable reasons, resulting in wear. Wear over time will affect the sealing effect and thus affect the normal operation of the equipment. However, the comb teeth are inside the aluminum labyrinth seal, and wear is not easy to detect when it occurs. Second, the more comb teeth, the better the sealing effect, and the longer the sealing length of the aluminum labyrinth seal, while the distance between the casing and the bearing box is limited. If the aluminum labyrinth seal itself is long, it will cause a problem of being close to the bearing box. Since the aluminum labyrinth seal is connected to the casing, some fans with higher temperatures will transfer heat to the aluminum labyrinth seal. The aluminum labyrinth seal is close to the bearing box, and the heat will be transferred to the bearing box through radiation, causing the bearing temperature to rise, affecting the service life of the bearing.

[0003] Therefore, there is an urgent need for a fan sealing device with an aluminum labyrinth seal having good sealing effect and high safety. Utility Model Content

[0004] In view of the above problems, the utility model provides a sealing device for a fan.

[0005] In order to achieve the above-mentioned object, the technical solution adopted by the utility model is as follows: a sealing device for a fan, located in a fan, the fan comprising a casing, a fan shaft, a bearing and a bearing box, the bearing being mounted in the bearing box, the sealing device for the fan comprising an aluminum labyrinth seal, a labyrinth seal temperature sensor, a controller and a water supply mechanism, the aluminum labyrinth seal, the fan shaft and the bearing being coaxial, the aluminum labyrinth seal being detachably connected to the casing on the side away from the bearing;

[0006] The aluminum labyrinth seal comprises a sealing body, a water groove is provided on the circumference of the sealing body, a temperature sensing mounting hole is provided on the sealing body, and the sealing body is detachably connected to the labyrinth seal temperature sensing element through the temperature sensing mounting hole;

[0007] The aluminum labyrinth seal also includes a water tank inlet pipe and a water tank outlet pipe, both of which are connected to the water tank, and the water supply mechanism is respectively connected to the water tank inlet pipe and the water tank outlet pipe, and the labyrinth seal temperature sensing component and the water supply mechanism are both communicatively connected to the controller.

[0008] Preferably, the water tank is annular and has a circular cross-section.

[0009] Preferably, the temperature sensing mounting hole is a threaded hole, and the sealing element body is threadedly connected to the labyrinth sealing temperature sensing element through the temperature sensing mounting hole.

[0010] Preferably, the water supply mechanism includes a water pump, an input pipe and an output pipe, the two ends of the water pump are connected to the input pipe and the output pipe respectively, the end of the input pipe away from the water pump is connected to the water inlet pipe of the sink, and the end of the output pipe away from the water pump is connected to the water outlet pipe of the sink, and the water pump is communicatively connected to the controller.

[0011] Preferably, the water supply mechanism further comprises a water pipe condensation member, which is detachably connected to the water inlet pipe of the sink, and the water pipe condensation member is communicatively connected to the controller.

[0012] Preferably, a warning light is further included, which is installed on the casing and is communicatively connected to the controller.

[0013] Preferably, a bearing temperature sensor is further included, wherein the bearing temperature sensor is attached to the bearing box and is communicatively connected to the controller.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] (1) The labyrinth seal temperature sensor is connected to the controller for communication, which effectively solves the problem that the aluminum labyrinth seal is not easy to detect. At the same time, it reduces the risk of heat from the casing being transferred to the bearing, ensures the safe operation of the fan, reduces the failure rate and increases the service life of the fan. The length of the aluminum labyrinth seal itself can be designed to be longer without worrying about damage to the bearing. It has good sealing effect and high safety. Opening a water groove in the aluminum labyrinth seal to pass cooling water can achieve a better cooling effect.

[0016] (2) The temperature sensing installation hole is a threaded hole, and the sealing body is threadedly connected to the labyrinth sealing temperature sensing element. By changing the screw-in depth of the thread, the labyrinth sealing temperature sensing element can be effectively installed for fans of different specifications and models, thereby increasing the scope of application;

[0017] (3) The bearing temperature sensor is fitted with the bearing box, and the bearing temperature sensor is connected to the controller for communication. The controller compares the temperature of the bearing temperature sensor with the temperature of the labyrinth seal temperature sensor. Thus, it is possible to determine whether the bearing temperature is too high due to a failure of the aluminum labyrinth seal without disassembling the casing. This facilitates targeted preparations before disassembling the casing, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments:

[0019] Figure 1 This is a schematic diagram of the cooperation between the fan sealing device and the fan shaft;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0021] Figure 3 This is a cross-sectional view of a sealing device for a fan;

[0022] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 5 This is a side view of a sealing device for a fan.

[0024] Reference numerals:

[0025] 1—aluminum labyrinth seal, 11—seal body, 12—water sink, 13—water sink inlet pipe, 14—water sink outlet pipe, 15—temperature sensor installation hole;

[0026] 2—Labyrinth seal temperature sensing element;

[0027] 3—housing;

[0028] 4—fan shaft;

[0029] 5—bearing;

[0030] 6—Bearing box. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0033] Example 1

[0034] The following combination Figures 1 to 5 Specify the sealing device for the fan, such as Figure 1 and Figure 2 As shown, a sealing device for a fan is located inside the fan. The fan includes a casing 3, a fan shaft 4, a bearing 5 and a bearing box 6. The bearing 5 is installed in the bearing box 6. The sealing device for the fan includes an aluminum labyrinth seal 1, a labyrinth seal temperature sensor 2, a controller and a water supply mechanism. The aluminum labyrinth seal 1, the fan shaft 4 and the bearing 5 are coaxial. The side of the aluminum labyrinth seal 1 away from the bearing 5 is detachably connected to the casing 3.

[0035] like Figure 3 and Figure 4 As shown, the aluminum labyrinth seal 1 includes a seal body 11 , which is circumferentially provided with a water groove 12 , and a temperature sensing mounting hole 15 , through which the seal body 11 is detachably connected to the labyrinth seal temperature sensing element 2 .

[0036] like Figure 5 As shown, the aluminum labyrinth seal 1 also includes a water tank water inlet pipe 13 and a water tank water outlet pipe 14, the water tank water inlet pipe 13 and the water tank water outlet pipe 14 are both connected to the water tank 12, the water supply mechanism is respectively connected to the water tank water inlet pipe 13 and the water tank water outlet pipe 14, and the labyrinth seal temperature sensing component 2 and the water supply mechanism are both communicatively connected to the controller.

[0037] like Figure 5 As shown, the water tank 12 is annular and has a circular cross section.

[0038] The temperature sensing mounting hole 15 is a threaded hole, and the sealing element body 11 is threadedly connected to the labyrinth sealing temperature sensing element 2 through the temperature sensing mounting hole 15 .

[0039] The water supply mechanism includes a water pump, an input pipe and an output pipe. The two ends of the water pump are connected to the input pipe and the output pipe respectively. The end of the input pipe away from the water pump is connected to the water inlet pipe 13 of the water tank, and the end of the output pipe away from the water pump is connected to the water outlet pipe 14 of the water tank. The water pump is communicatively connected to the controller.

[0040] The water supply mechanism also includes a water pipe condensation component, which is detachably connected to the water tank water inlet pipe 13 and is communicatively connected to the controller.

[0041] It also includes a warning light, which is installed on the housing 3 and is communicatively connected to the controller.

[0042] It also includes a bearing temperature sensing component, which is fitted with the bearing box 6 and is communicatively connected to the controller.

[0043] Working principle of sealing device for fan:

[0044] A temperature sensing mounting hole 15 is opened on the sealing body 11 to install the labyrinth sealing temperature sensing element 2. When wear occurs, the temperature of the sealing body 11 will increase abnormally due to frictional heat generation. The labyrinth sealing temperature sensing element 2 can capture the abnormal temperature change and then transmit it to the warning light through the controller to alarm. Maintenance personnel can troubleshoot the problem according to the alarm. In view of the problem that the heat transfer of the aluminum labyrinth seal 1 of the high-temperature fan causes the temperature of the bearing 5 to increase, a water tank 12 is opened in the sealing body 11 to pass cooling water, which can achieve a better cooling effect.

[0045] As the technical solution of the present invention, the hardware setting provided is only for the purpose of facilitating the realization of braking control based on the hardware facilities. How to realize braking control and braking control method specifically is not the technical problem to be solved and the object to be protected by the present invention. At the same time, the communication method between the devices adopts the existing communication method, which is not the utility model point of this application.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sealing device for a fan, located in a fan, wherein the fan comprises a casing (3), a fan shaft (4), a bearing (5) and a bearing box (6), wherein the bearing (5) is mounted on the bearing box (6), and is characterized in that: The fan sealing device comprises an aluminum labyrinth seal (1), a labyrinth seal temperature sensing element (2), a controller and a water supply mechanism, wherein the aluminum labyrinth seal (1), the fan shaft (4) and the bearing (5) are coaxial, and the side of the aluminum labyrinth seal (1) away from the bearing (5) is detachably connected to the casing (3); The aluminum labyrinth seal (1) comprises a seal body (11), a water groove (12) is provided on the seal body (11) in a circumferential direction, a temperature sensing mounting hole (15) is provided on the seal body (11), and the seal body (11) is detachably connected to the labyrinth seal temperature sensing element (2) via the temperature sensing mounting hole (15); The aluminum labyrinth seal (1) further comprises a water trough inlet pipe (13) and a water trough outlet pipe (14), both of which are in communication with the water trough (12), and the water supply mechanism is in communication with the water trough inlet pipe (13) and the water trough outlet pipe (14), respectively. The labyrinth seal temperature sensing element (2) and the water supply mechanism are both in communication with the controller.

2. A sealing device for a fan according to claim 1, characterized in that: The water tank (12) is annular, and the cross section of the water tank (12) is circular.

3. A sealing device for a fan according to claim 1, characterized in that: The temperature sensing mounting hole (15) is a threaded hole, and the sealing element body (11) is threadedly connected to the labyrinth sealing temperature sensing element (2) through the temperature sensing mounting hole (15).

4. A sealing device for a fan according to claim 1, characterized in that: The water supply mechanism comprises a water pump, an input pipe and an output pipe, the two ends of the water pump are respectively connected to the input pipe and the output pipe, the end of the input pipe away from the water pump is connected to the water inlet pipe (13) of the water tank, the end of the output pipe away from the water pump is connected to the water outlet pipe (14) of the water tank, and the water pump is in communication with the controller.

5. A sealing device for a fan according to claim 4, characterized in that: The water supply mechanism further comprises a water pipe condensation component, the water pipe condensation component is detachably connected to the water inlet pipe (13) of the water tank, and the water pipe condensation component is communicatively connected to the controller.

6. The sealing device for a fan according to claim 1, characterized in that: It also includes a warning light, which is installed on the housing (3) and is communicatively connected to the controller.

7. The sealing device for a fan according to claim 1, characterized in that: It also includes a bearing temperature sensing component, the bearing temperature sensing component is fitted with the bearing box (6), and the bearing temperature sensing component is communicatively connected with the controller.

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