Non-contact sealed wind meter

Abstract

The utility model relates to the field of wind measuring devices, in particular to a non-contact sealed wind measuring instrument, which comprises a fan blade, a connecting part and a base, and the fan blade comprises a fixed part and a plurality of blades arranged on the circumference of the fixed part; a rotating shaft is arranged in the middle of the lower end of the fixing part, a first through hole is formed in the middle of the connecting part, and a bearing connected with the rotating shaft is arranged in the first through hole; the side, away from the fan blades, of the connecting part is connected with the base, and the measuring circuit board is arranged in the base. An annular first sealing assembly is arranged on the side, close to the connecting part, of the fixing part, an annular second sealing assembly is arranged on the connecting part, and the first sealing assembly and the second sealing assembly are arranged in a crossed mode and do not make contact with each other. Due to the non-contact penetrating type design on the wind meter, dust and the like can be effectively prevented from entering the wind meter, and even if a small amount of dust enters the wind meter, the dust can be blocked by the bend; and meanwhile, multiple interpenetration can also effectively prevent water.

Description

Technical Field

[0001] The utility model relates to the technical field of wind measuring devices, in particular to a non-contact sealed wind measuring instrument. Background Art

[0002] Anemometers can be used in fields such as wind energy, meteorology, industry, agriculture, hydrology and water conservancy, highways, airports and open areas. Generally, the wind drives the fan blades, and the wind speed is calculated by measuring the rotation speed of the fan blades. Since anemometers need to be used outdoors for a long time or in some extreme environments such as dust, their measurement accuracy is easily affected, and the service life of the anemometer is also affected. This requires the anemometer to have good sealing performance and not be affected by the external environment; however, traditional sealing methods are mostly contact sealing, such as sealing rings, oil seals, etc. This type of contact sealing will also have a certain friction, which will affect the rotation speed of the fan blades, and thus affect the measurement accuracy. Therefore, how to ensure the measurement accuracy of the anemometer while ensuring the sealing performance is a problem that technicians in this field need to consider. Utility Model Content

[0003] The utility model aims to provide a non-contact sealed anemometer to solve the problems of measuring accuracy and sealing of anemometers in the prior art.

[0004] The technical solution of the utility model is: a non-contact sealed anemometer, comprising a fan blade, a connecting part and a base, wherein the fan blade comprises a fixing part and a plurality of blades arranged around the fixing part; a rotating shaft is arranged at the center of the lower end of the fixing part, a first through hole is arranged at the center of the connecting part, a bearing connected to the rotating shaft is arranged in the first through hole; a side of the connecting part away from the fan blade is connected to the base, and a measuring circuit board is arranged in the base;

[0005] A first annular sealing component is disposed on one side of the fixing portion close to the connecting portion, and a second annular sealing component is disposed on the connecting portion. The first sealing component and the second sealing component are disposed crosswise with each other and do not contact each other.

[0006] Preferably, the first sealing assembly comprises a first stage and a second stage arranged on the rotating shaft, and a first boss is formed between the first stage and the second stage;

[0007] The second sealing assembly includes a first sealing ring disposed in the first through hole and protruding inwardly along the circumference;

[0008] The first stage extends to the interior of the first sealing ring and is gap-connected with the inner ring of the first sealing ring; the second stage is connected to the upper end of the first sealing ring, and the first boss is gap-connected with the upper end of the first sealing ring.

[0009] Preferably, the first sealing assembly comprises a first sealing plate arranged on the fixed portion, the first sealing plate is annular and coaxial with the rotating shaft;

[0010] The second sealing assembly is provided with an annular first sealing groove, and the first sealing plate extends into the first sealing groove and is gap-connected.

[0011] Preferably, the first sealing assembly comprises a second sealing plate arranged on the fixed portion, the second sealing plate is annular and coaxial with the rotating shaft;

[0012] The second sealing assembly includes a second sealing groove disposed at the upper end of the connecting portion, and the end of the second sealing plate extends to the second sealing groove and is gap-connected.

[0013] Preferably, the lower end portion of the second sealing plate protrudes from the lower end portion of the first sealing plate.

[0014] Preferably, a third step is provided at the outer edge of the second sealing plate, and the outer circle of the third step has the same diameter as the outer circle of the connecting portion.

[0015] Preferably, a plurality of fins are evenly arranged in a ring shape on the fixing portion, and the fins are arranged between the first sealing plate and the second sealing plate.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] (1) The non-contact interlaced design of the anemometer can effectively prevent dust from entering. Even if a small amount of dust enters, it will be blocked by the bend. At the same time, multiple interlacing can also effectively prevent water;

[0018] (2) The non-contact interlaced sealing design and the sealed connection between the connecting part and the base form a gas-stable space inside the anemometer, which can avoid the flow of internal airflow. Therefore, even if it is used in an environment with corrosive gases, it can prevent corrosive gases from entering the interior of the anemometer, or even if they enter, the circulation will not be affected much, which greatly increases the service life and measurement accuracy of the anemometer.

[0019] (3) By setting the fins, a counter-flow can be formed when the external flowing gas is about to enter, further blocking the inflow of external gas and increasing the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 It is a structural schematic diagram of the non-contact sealed anemometer of the utility model;

[0022] Figure 2It is a schematic diagram of the structure of the non-contact sealed anemometer of the utility model in a top view and a cross-sectional view at AA;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the fan blade of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the connecting part of the utility model.

[0026] Among them: fan blade 1, first sealing component 1a, fixing part 11, first sealing plate 111, second sealing plate 112, third stage 113, fin 114, blade 12, rotating shaft 13, first stage 131, second stage 132, first boss 133, connecting part 2, second sealing component 2a, first through hole 21, first sealing ring 211, bearing 22, first sealing groove 23, second sealing groove 24, base 3. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0028] like Figure 1-5 As shown, a non-contact sealed anemometer comprises a fan blade 1, a connecting portion 2 and a base 3, wherein the fan blade 1 comprises a fixing portion 11 and a plurality of blades 12 arranged around the fixing portion 11. A rotating shaft 13 is arranged at the center of the lower end of the fixing portion 11, a first through hole 21 is arranged at the center of the connecting portion 2, and a bearing 22 connected to the rotating shaft 13 is arranged in the first through hole 21; the connecting portion 2 is connected to the base 3 at a side away from the fan blade 1, and a measuring circuit board (not shown in the figure) is arranged in the base 3.

[0029] In this embodiment, the cross section of the fixing portion 11 is U-shaped, and the whole is connected to the connecting portion 2 in an inverted manner; a plurality of blades 12 are evenly arranged on the outer circle of the fixing portion 11. Two bearings 22 can be provided in the first through hole 21 to facilitate the stable rotation of the rotating shaft 13. The connecting portion 2 and the base 3 are contact-sealed. A sensing device (not shown) connected to the measuring circuit board is also provided on the base 3. When measuring wind, the wind drives the fan blades 1 to rotate, and then the rotating shaft 13 rotates synchronously; the sensing device senses the rotation speed of the rotating shaft 13, converts the wind speed through the measuring circuit board, and transmits it through a signal.

[0030] A first annular sealing component 1a is provided on one side of the fixing portion 11 close to the connecting portion 2, and a second annular sealing component 2a is provided on the connecting portion 2. The first sealing component 1a and the second sealing component 2a are arranged crosswise with each other and do not contact each other. In this embodiment, the first sealing component 1a and the second sealing component 2a together form three seals, and of course, multiple seals can also be provided according to actual conditions. The three seals in this embodiment are specifically:

[0031] The first sealing assembly 1a includes a first stage 131 and a second stage 132 disposed on the rotating shaft 13, and a first convex shoulder 133 is formed between the first stage 131 and the second stage 132. The second sealing assembly 2a includes a first sealing ring 211 disposed in the first through hole 21 and convex inward along the circumference. The first stage 131 extends to the inside of the first sealing ring 211 and is gap-connected with the inner ring of the first sealing ring 211; the second stage 132 is connected to the upper end of the first sealing ring 211, and the first convex shoulder 133 is gap-connected with the upper end of the first sealing ring 211. This is the third seal.

[0032] The first sealing assembly 1a includes a first sealing plate 111 disposed on the fixed portion 11. The first sealing plate 111 is annular and coaxial with the rotating shaft 13. The second sealing assembly 2a is provided with an annular first sealing groove 23. The first sealing plate 111 extends into the first sealing groove 23 and is gap-connected. This is the second seal.

[0033] The first sealing assembly 1a includes a second sealing plate 112 disposed on the fixed portion 11. The second sealing plate 112 is annular and coaxial with the rotating shaft 13. The second sealing assembly 2a includes a second sealing groove 24 disposed at the upper end of the connecting portion 2. The end of the second sealing plate 112 extends to the second sealing groove 24 and is gap-connected. The lower end of the second sealing plate 112 protrudes from the lower end of the first sealing plate 111. This is the first seal.

[0034] It should be emphasized that the seal in this embodiment is not an airtight seal, but is arranged through non-contact interlacing to prevent dust, powder, etc. from entering the interior of the anemometer; at the same time, it also avoids or reduces the flow of gas inside the anemometer, thereby preventing corrosive or humid gas from entering and affecting the anemometer.

[0035] The outer edge of the second sealing plate 112 is provided with a third step 113, and the outer circle of the third step 113 has the same diameter as the outer circle of the connecting portion 2. The outer circle of the fixing portion 11 and the outer circle of the connecting portion 2 are arranged on the same arc surface, which can avoid the influence of the flow on the accuracy when the fan blade 1 rotates. In addition, the step design can further prevent dust and powder from entering.

[0036] The fixing part 11 is provided with a plurality of fins 114 arranged evenly in an annular shape, and the fins 114 are provided between the first sealing plate 111 and the second sealing plate 112. The fins 114 can form a counter flow when the external flowing gas is about to enter the anemometer, further blocking the inflow of external gas and increasing the sealing performance.

[0037] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A non-contact sealed anemometer, characterized in that: It comprises a fan blade, a connecting part and a base, wherein the fan blade comprises a fixing part and a plurality of blades arranged around the fixing part; a rotating shaft is arranged at the center of the lower end of the fixing part, a first through hole is arranged at the center of the connecting part, and a bearing connected to the rotating shaft is arranged in the first through hole; a side of the connecting part away from the fan blade is connected to the base, and a measuring circuit board is arranged in the base; A first annular sealing component is disposed on one side of the fixing portion close to the connecting portion, and a second annular sealing component is disposed on the connecting portion. The first sealing component and the second sealing component are disposed crosswise with each other and do not contact each other.

2. A non-contact sealed anemometer according to claim 1, characterized in that: The first sealing assembly comprises a first stage and a second stage arranged on the rotating shaft, and a first boss is formed between the first stage and the second stage; The second sealing assembly includes a first sealing ring disposed in the first through hole and protruding inwardly along the circumference; The first stage extends to the interior of the first sealing ring and is gap-connected with the inner ring of the first sealing ring; the second stage is connected to the upper end of the first sealing ring, and the first boss is gap-connected with the upper end of the first sealing ring.

3. A non-contact sealed anemometer according to claim 1, characterized in that: The first sealing assembly comprises a first sealing plate arranged at the fixed portion, the first sealing plate being annular and coaxial with the rotating shaft; The second sealing assembly is provided with an annular first sealing groove, and the first sealing plate extends into the first sealing groove and is gap-connected.

4. A non-contact sealed anemometer according to claim 3, characterized in that: The first sealing assembly comprises a second sealing plate arranged at the fixed portion, the second sealing plate being annular and coaxial with the rotating shaft; The second sealing assembly includes a second sealing groove disposed at the upper end of the connecting portion, and the end of the second sealing plate extends to the second sealing groove and is gap-connected.

5. A non-contact sealed anemometer according to claim 4, characterized in that: The lower end portion of the second sealing plate protrudes from the lower end portion of the first sealing plate.

6. A non-contact sealed anemometer according to claim 4, characterized in that: The outer edge of the second sealing plate is provided with a third step, and the outer circle of the third step has the same diameter as the outer circle of the connecting portion.

7. A non-contact sealed anemometer according to claim 4, characterized in that: A plurality of fins are evenly arranged in an annular shape on the fixing portion, and the fins are arranged between the first sealing plate and the second sealing plate.

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