An inlet bell device for a fan

Abstract

This utility model discloses an inlet bell device for a fan, relating to the field of fan technology. It includes a main body, with a second connecting ring fixed to its end face. A first connecting ring is fixed to the outer wall of the main body near the second connecting ring. A sealing ring is movably sleeved on the outer wall of the main body, positioned between the first and second connecting rings. A base cylinder is sleeved on the outer wall of the main body. This utility model, through the arrangement of the sealing ring and sealing cylinder, allows them to approach and enclose the end of a bolt, providing sealing protection and preventing moisture in the air from causing bolt corrosion, which would affect the subsequent disassembly and assembly of the inlet bell. Furthermore, with the assistance of a ring-shaped elastic element, the sealing cylinder stably wraps around the bolt end. The sealing gasket between the inlet bell and the fan can be easily removed, or partially removed, making gasket replacement more convenient.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to an inlet bell device for a fan. Background Technology

[0002] The fan inlet bell, also known as the fan inlet bell-shaped device, mainly consists of a bell-shaped channel and a connecting plate. The function of the inlet device is to ensure that fluid enters the impeller of the pump or fan with minimal loss and uniform pressure and velocity distribution. The inlet device is installed at the inlet of the fan impeller. Because fans often use a bell shape as the suction chamber, it is simply called the inlet bell.

[0003] Its inlet bell adopts a trumpet-shaped tapering structure to guide the airflow smoothly into the impeller, avoiding turbulence and sudden pressure loss, and reducing intake resistance. Its curved surface design needs to match the natural contraction trajectory of the airflow to ensure that the gas kinetic energy is efficiently converted into pressure energy. However, the inlet bells are all bolted to the fan. Due to the influence of the moisture content in the air, the exposed bolts will rust, making it difficult or even impossible to tighten the threads, thus affecting the disassembly and assembly of the inlet bell. Therefore, an inlet bell device for the fan is proposed. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an inlet bell device for a fan to solve the technical problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an inlet bell device for a fan, comprising a main body, a second connecting ring fixed to the end face of the main body, a first connecting ring fixed to the outer wall of the main body near the second connecting ring, and a sealing ring movably sleeved on the outer wall of the main body, the sealing ring being positioned between the first connecting ring and the second connecting ring;

[0006] The outer wall of the main body is fitted with a base cylinder, and the two ends of the base cylinder are fixed to the end faces of the first connecting ring and the second connecting ring, respectively. The outer wall of the base cylinder is equipped with an annular elastic element for constraining and sealing rings. The end of the first connecting ring away from the second connecting ring is provided with an annular groove, and a sealing gasket that abuts against the fan is installed in the annular groove.

[0007] As a preferred technical solution, the end faces of the first connecting ring and the second connecting ring are provided with multiple sets of threaded holes, which are equidistantly distributed along their circumference.

[0008] As a preferred technical solution, multiple sets of positioning rods are fixed in a ring array between the first connecting ring and the second connecting ring. Each set of positioning rods passes through the sealing ring, and the sealing ring is provided with positioning holes at the positions where it contacts each set of positioning rods.

[0009] As a preferred technical solution, the sealing ring has sealing cylinders fixed in a ring array at one end near the first connecting ring, and the number of sealing cylinders corresponds to the threaded holes opened on the end face of the first connecting ring.

[0010] As a preferred technical solution, the annular elastic element is provided with support ring seats on both sides, and the support ring seats are fixed to the curved outer wall of the base cylinder.

[0011] As a preferred technical solution, the sealing gasket includes four sets of arc-shaped gaskets. Each set of arc-shaped gaskets has an arc-shaped groove on its end face and near the inner and outer edges. The rear end of the arc-shaped gasket has two sets of clearance grooves that communicate with the arc-shaped grooves.

[0012] As a preferred technical solution, the inner wall of the annular groove is fixed with semi-circular pieces at equal intervals along its circumference, and the distance between two adjacent sets of semi-circular pieces corresponds to the clearance groove.

[0013] In summary, the present invention has the following main advantages:

[0014] This invention, through the design of a sealing ring and a sealing cylinder, allows the bolt end to be approached and wrapped around for concealment, thus sealing and protecting the bolt end and preventing moisture in the air from causing bolt corrosion, which would affect the subsequent disassembly and assembly of the inlet bell. With the assistance of the annular elastic element, the sealing cylinder stably wraps around the bolt end, and the sealing gasket between the inlet bell and the fan can be easily removed or partially removed, making the replacement of the sealing gasket more convenient. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the unfolded structure of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the arc-shaped pad of this utility model.

[0019] In the diagram: 100, main body; 110, first connecting ring; 120, second connecting ring; 130, sealing ring; 131, sealing cylinder; 132, positioning hole; 140, annular elastic element; 150, base cylinder; 160, positioning rod; 170, annular groove; 171, semi-circular piece; 180, sealing gasket; 181, arc-shaped gasket; 182, arc-shaped groove; 183, clearance groove. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of this utility model will be described below based on its overall structure.

[0022] An inlet bell device for a fan, such as Figure 1 Figure 4 As shown, the device includes a main body 100, a second connecting ring 120 fixed to the end face of the main body 100, a first connecting ring 110 fixed to the outer wall of the main body 100 near the second connecting ring 120, and a sealing ring 130 movably sleeved on the outer wall of the main body 100, with the sealing ring 130 positioned between the first connecting ring 110 and the second connecting ring 120.

[0023] The outer wall of the main body 100 is fitted with a base cylinder 150, and the two ends of the base cylinder 150 are fixed to the end faces of the first connecting ring 110 and the second connecting ring 120 respectively. The outer wall of the base cylinder 150 is equipped with an annular elastic element 140 of the constraint sealing ring 130. The end of the first connecting ring 110 away from the second connecting ring 120 is provided with an annular groove 170, and a sealing gasket 180 that abuts against the fan is installed in the annular groove 170.

[0024] The sealing gasket 180 includes four sets of arc-shaped gaskets 181. Each set of arc-shaped gaskets 181 has an arc-shaped groove 182 on its end face and near the inner and outer edges. The rear end of the arc-shaped gasket 181 has two sets of clearance grooves 183 that communicate with the arc-shaped grooves 182.

[0025] The inner wall of the annular groove 170 is fixed with semi-circular pieces 171 at equal intervals along its circumference, and the distance between two adjacent sets of semi-circular pieces 171 corresponds to the clearance groove 183.

[0026] Multiple sets of threaded holes are provided on the end faces of the first connecting ring 110 and the second connecting ring 120, and the multiple sets of threaded holes are equidistantly distributed along their circumference.

[0027] The sealing ring 130 has sealing cylinders 131 fixed in a ring array at one end near the first connecting ring 110. The number of sealing cylinders 131 corresponds to the threaded holes opened on the end face of the first connecting ring 110. A rubber ring is glued to the end face of the sealing cylinder 131.

[0028] The end of the main body 100 is inserted into the inlet of the fan impeller, and the bolt is tightened through the first connecting ring 110 until the bolt enters the threaded hole reserved at the fan inlet. This fixes the main body to the fan. At this time, an external force is applied to the sealing ring 130 on the side close to the first connecting ring 110 (the inner wall of the sealing ring 130 is arc-shaped). The inner wall of the sealing ring 130 deforms the annular elastic element 140 by pressing it, allowing the sealing ring 130 to pass through the outer wall of the annular elastic element 140. At this time, the sealing cylinder 131 contacts the end face of the first connecting ring 110 and includes the bolt end, thus hiding and protecting the bolt end and preventing corrosion caused by contact with moisture. This also makes it convenient to manually rotate the bolt to remove the inlet bell for replacement later.

[0029] When the first connecting ring 110 is attached to the fan and fixed by bolts, the two squeeze the sealing gasket 180 to eliminate gaps, thus sealing the connection between the main body 100 and the fan. When replacing an aged or damaged sealing gasket 180, simply loosen the bolts to create a gap between the first connecting ring 110 and the fan. At this time, the sealing gasket 180 can be rotated in the ring groove 170 to align the semicircular piece 171 with the relief groove 183, and the sealing gasket 180 can be removed or the damaged arc-shaped gasket 181 can be taken out, making the disassembly of the sealing gasket 180 convenient.

[0030] Please refer to this carefully. Figure 1 , Figure 2 and Figure 3 Multiple sets of positioning rods 160 are fixed in a ring array between the first connecting ring 110 and the second connecting ring 120. Each set of positioning rods 160 passes through the sealing ring 130, and a positioning hole 132 is provided at the position where the sealing ring 130 contacts each set of positioning rods 160.

[0031] The positioning rod 160 and the positioning hole 132 cooperate with each other to drive the sealing ring 130 to move linearly along the axis of the main body 100, ensuring that the sealing cylinder 131 accurately seals each set of bolts.

[0032] Please refer to this carefully. Figure 2 and Figure 3 Both sides of the annular elastic element 140 are provided with support ring seats, and the support ring seats are fixed to the curved outer wall of the base cylinder 150.

[0033] The annular elastic element 140 serves to constrain the sealing ring 130, thereby stably limiting its position.

[0034] In use, the end of the main body 100 is inserted into the inlet of the fan impeller, and the bolt is tightened through the first connecting ring 110 until the bolt enters the threaded hole reserved at the fan inlet. This fixes the main body to the fan. At this time, an external force is applied to the sealing ring 130 on the side close to the first connecting ring 110 (the inner wall of the sealing ring 130 is arc-shaped). The inner wall of the sealing ring 130 deforms the annular elastic element 140 by pressing it, allowing the sealing ring 130 to pass through the outer wall of the annular elastic element 140. At this time, the sealing cylinder 131 contacts the end face of the first connecting ring 110 and includes the bolt end, thus hiding and protecting the bolt end and preventing corrosion caused by contact with moisture. This also makes it convenient to manually rotate the bolt to remove the inlet bell for replacement later.

[0035] When the first connecting ring 110 is attached to the fan and fixed by bolts, the two squeeze the sealing gasket 180 to eliminate gaps, thus sealing the connection between the main body 100 and the fan. When replacing an aged or damaged sealing gasket 180, simply loosen the bolts to create a gap between the first connecting ring 110 and the fan. At this time, the sealing gasket 180 can be rotated in the ring groove 170 to align the semicircular piece 171 with the relief groove 183, and the sealing gasket 180 can be removed or the damaged arc-shaped gasket 181 can be removed, making the disassembly of the sealing gasket 180 convenient. All parts not mentioned in this device are the same as or can be implemented using existing technology.

[0036] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An inlet bell arrangement for a fan comprising a main body (100) characterised in that: A second connecting ring (120) is fixed to the end face of the main body (100), and a first connecting ring (110) is fixed to the outer wall of the main body (100) near the second connecting ring (120). A sealing ring (130) is movably sleeved on the outer wall of the main body (100), and the sealing ring (130) is located between the first connecting ring (110) and the second connecting ring (120). The outer wall of the main body (100) is fitted with a base cylinder (150), and the two ends of the base cylinder (150) are fixed to the end faces of the first connecting ring (110) and the second connecting ring (120) respectively. The outer wall of the base cylinder (150) is equipped with an annular elastic element (140) of a constraint sealing ring (130). The end of the first connecting ring (110) away from the second connecting ring (120) is provided with an annular groove (170), and a sealing gasket (180) that abuts against the fan is installed in the annular groove (170).

2. An inlet bell arrangement for a fan as claimed in claim 1, characterised in that: The end faces of the first connecting ring (110) and the second connecting ring (120) have multiple sets of threaded holes, which are equidistantly distributed along their circumference.

3. An inlet bell arrangement for a fan as claimed in claim 1, characterised in that: Multiple sets of positioning rods (160) are fixed in a ring array between the first connecting ring (110) and the second connecting ring (120). Each set of positioning rods (160) passes through the sealing ring (130), and the sealing ring (130) is provided with a positioning hole (132) at the position where it contacts each set of positioning rods (160).

4. An inlet bell arrangement for a fan as claimed in claim 3, characterised in that: The sealing ring (130) has sealing cylinders (131) fixed in a ring array at one end near the first connecting ring (110), and the number of sealing cylinders (131) corresponds to the threaded holes opened on the end face of the first connecting ring (110).

5. The inlet bell arrangement of a fan as claimed in claim 1, characterized in that: Both sides of the annular elastic element (140) are provided with support ring seats, and the support ring seats are fixed to the curved outer wall of the base cylinder (150).

6. The inlet bell arrangement of a fan as claimed in claim 1, characterized in that: The sealing gasket (180) includes four sets of arc-shaped gaskets (181). Each set of arc-shaped gaskets (181) has an arc-shaped groove (182) on its end face and near the inner and outer edges. The rear end of the arc-shaped gasket (181) has two sets of clearance grooves (183) that communicate with the arc-shaped grooves (182).

7. An inlet bell arrangement for a fan as claimed in claim 6, characterised in that: The inner wall of the annular groove (170) is fixed with semi-circular pieces (171) at equal intervals along its circumference, and the distance between two adjacent sets of semi-circular pieces (171) corresponds to the clearance groove (183).

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