Leakage-proof glass fiber reinforced plastic centrifugal fan

Abstract

The utility model discloses a leakproof glass fiber reinforced plastic centrifugal fan which comprises an outer shell with an air inlet and an air outlet and a fan body arranged in the outer shell, the fan body comprises a shell body, an impeller bottom plate, an impeller and an impeller axis, the impeller bottom plate is arranged on the side, away from the air inlet, of the shell body, and the impeller bottom plate is arranged on the side, away from the air inlet, of the shell body. The impeller axis penetrates through the outer shell and the side wall of the impeller bottom plate to be connected with the impeller located in the shell, and a shaft seal surrounding the impeller axis is arranged on the outer side of the shell. The shaft seal structure has the advantages that the sealing performance is improved through the shaft seal, meanwhile, water drops are drained through the water retaining ring and the drainage channel, the water drops slide to the inner bottom face of the shell along the outer peripheral wall of the water retaining ring or the drainage channel to be discharged without passing through the shaft seal ring, the shaft seal ring is prevented from being affected, the service life of the fan is prolonged, and the service life of the fan is prolonged. The operation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of fans, in particular to the field of centrifugal fans, and specifically relates to a leakage-proof glass fiber reinforced plastic centrifugal fan. Background Art

[0002] The fan operates in the system as a power device: when the fan impeller rotates at high speed, dynamic pressure will be generated while transmitting and processing gas or water vapor. Some gas or water vapor will be pressurized and flow out from the gaps inside the FRP fan, especially leaking out from the gaps in the shaft seal. When the shaft seal ring enters water, the friction will increase, and at the same time, the water will bring out the lubricating oil of the shaft seal ring, causing wear and reducing the service life. Utility Model Content

[0003] The utility model aims to provide a leakage-proof glass fiber reinforced plastic centrifugal fan.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A leakage-proof glass fiber reinforced plastic centrifugal fan comprises a shell with an air inlet and an air outlet and a fan arranged in the shell, wherein the fan comprises a casing, an impeller base plate, an impeller and an impeller axis, wherein the impeller base plate is arranged on a side of the casing away from the air inlet, the impeller axis penetrates the side wall of the casing and the impeller base plate and is connected to the impeller located in the casing, and a shaft seal surrounding the impeller axis is arranged on the outer side of the casing.

[0006] Preferably, an annular water retaining ring is provided on the side of the impeller bottom plate facing away from the air inlet, and a drain outlet is provided at the bottom of the shell, and a valve is provided at the drain outlet.

[0007] Preferably, an annular drainage channel is provided at the outer shell corresponding to the impeller bottom plate, and the diameter of the drainage channel is smaller than the diameter of the water retaining ring.

[0008] Preferably, the drainage channel extends toward the direction of the water retaining ring on one side of the impeller bottom plate to form an annular baffle.

[0009] Preferably, the inner bottom surface of the bottom of the shell is designed to be inclined, and the drain outlet is located at the lowest point of the inner bottom surface of the shell.

[0010] Preferably, the outer shell, the casing and the impeller base plate are all made of fiberglass.

[0011] The beneficial effects of the utility model are as follows: the sealing performance is increased by the shaft seal, and water vapor is prevented from entering through the shaft seal ring due to the pressure difference and affecting the shaft seal ring; at the same time, water droplets are drained through the water retaining ring and the drainage channel, so that the water droplets slide along the outer peripheral wall of the water retaining ring or the drainage channel to the inner bottom surface of the outer shell for discharge without passing through the shaft seal ring, thereby avoiding affecting the shaft seal ring, extending the service life and improving the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 Yes Yes Figure 1 A is an enlarged schematic diagram.

[0014] Among them: an outer shell 10, a casing 12, an impeller bottom plate 14, an impeller shaft 16, a shaft seal 18, a drain port 20, a water retaining ring 22, a drainage channel 24, a baffle 26, an air inlet 28, and an air outlet 30. DETAILED DESCRIPTION

[0015] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0016] like Figure 1 As shown, a leakage-proof glass fiber reinforced plastic centrifugal fan of the utility model comprises a housing 10 with an air inlet 28 and an air outlet 30 and a fan arranged in the housing 10, the fan comprises a housing 12, an impeller bottom plate 14, an impeller and an impeller axis 16, the impeller bottom plate 14 is arranged on a side of the housing 12 away from the air inlet 28, the impeller axis 16 penetrates the side wall of the housing 10 and the impeller bottom plate 14 and is connected to the impeller located in the housing 12, and a shaft seal 18 surrounding the impeller axis 16 is arranged on the outer side of the housing 12;

[0017] The fan operates in the system as a power device: the fan impeller (not shown in the figure) generates dynamic pressure while transmitting and processing gas during high-speed rotation. Part of the gas will be pressurized and flow out from the gaps inside the FRP fan, especially leaking from the gaps. When the water vapor passes through the shaft sealing ring (not shown in the figure), it will take away the internal lubricating oil, and may bring some dust and other substances in the air into the lubricating oil, resulting in greater friction and reduced service life. The sealing effect can be improved by adding a shaft seal 18 to reduce the entry of external air.

[0018] On one side of the impeller bottom plate 14 facing away from the air inlet 28, an annular water retaining ring 22 is provided. At the bottom of the housing 10, a drain port 20 is provided, and a valve is provided at the drain port 20. Part of the water vapor will condense on the inner top of the housing 10 and drip onto the shaft seal ring, increasing the friction. By providing the water retaining ring 22, the water retaining ring 22 will block the water droplets and slide along the outer peripheral wall of the water retaining ring 22 to the bottom of the housing 10, and then drain through the drain port 20. By controlling the opening and closing of the drain port 20 through the valve, the entry of external gas from the drain port 20 can be reduced.

[0019] An annular drainage channel 24 is provided at the housing 10 corresponding to the impeller bottom plate 14, and the diameter of the drainage channel 24 is smaller than the diameter of the water retaining ring 22. Part of the water on the water retaining ring 22 will also drip along the width direction of the water retaining ring 22, and the water droplets on the housing 10 will also slide along its inner wall to the shaft seal ring. By providing the drainage channel 24, a secondary drainage effect on the water droplets is achieved.

[0020] The drainage channel 24 extends towards the water retaining ring 22 on one side facing the impeller bottom plate 14 to form an annular baffle 26; the baffle 26 prevents the water droplets from dripping in the width direction of the drainage channel 24.

[0021] The inner bottom surface of the bottom of the housing 10 is inclined, and the drain port 20 is located at the lowest point of the inner bottom surface of the housing 10. Through the inclined inner bottom surface design, the water located at the bottom of the housing 10 can be more easily gathered at the drain port 20.

[0022] The housing 10, the housing body 12, and the impeller bottom plate 14 are all made of fiberglass; fiberglass has the characteristics of light weight, high strength, corrosion resistance, etc., and has a longer service life.

[0023] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A leak-proof FRP centrifugal fan, characterized in that: The invention comprises an outer shell with an air inlet and an air outlet and a fan arranged in the outer shell, wherein the fan comprises a casing, an impeller base plate, an impeller and an impeller axis, wherein the impeller base plate is arranged on the side of the casing away from the air inlet, the impeller axis penetrates the side wall of the casing and the impeller base plate and is connected to the impeller located in the casing, and a shaft seal surrounding the impeller axis is arranged on the outer side of the casing; an annular water retaining ring is arranged on the side of the impeller base plate away from the air inlet, a drain outlet is arranged at the bottom of the casing, and a valve is arranged at the drain outlet.

2. The leak-proof FRP centrifugal fan according to claim 1, wherein: An annular drainage channel is arranged at the outer shell corresponding to the impeller bottom plate, and the diameter of the drainage channel is smaller than the diameter of the water retaining ring.

3. The leak-proof FRP centrifugal fan according to claim 2, characterized in that: The flow guide channel extends toward the direction of the water retaining ring on one side of the impeller bottom plate to form an annular baffle.

4. The leak-proof FRP centrifugal fan according to claim 1, wherein: The inner bottom surface of the bottom of the shell is designed to be inclined, and the drain port is located at the lowest point of the inner bottom surface of the shell.

5. The leak-proof FRP centrifugal fan according to claim 1, wherein: The outer shell, the casing and the impeller bottom plate are all made of glass fiber reinforced plastics.

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