Fan coupling

Abstract

The fan coupler is used for being connected with a fan main shaft, one end of the coupler is provided with a mounting groove, the end, close to the coupler, of the fan main shaft is provided with a mounting section matched with the mounting groove, and a connecting key is arranged between the mounting section and the mounting groove; a connecting screw is arranged at the end, close to the fan main shaft, of the coupler in the axial direction, and the connecting screw penetrates through the mounting groove and is fixed to the end face of the mounting section. Compared with the prior art, the coupling has the advantages of being high in connection stability and torque transmission capacity, low in coupling abrasion, long in service life, simple in structure, convenient to assemble and disassemble, convenient to maintain later and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of fan main shaft connection, and in particular to a fan coupling. Background Art

[0002] In the field of fan equipment, the traditional fan coupling technology has a long development history. Early couplings generally adopted simple bolt connection or flange connection methods. With the continuous progress of industry technology, although the connection form of the coupling has been improved, there are still a series of problems to be solved urgently.

[0003] In terms of wear, since vibration is inevitably generated during the operation of the fan, and it is difficult to maintain the concentricity of the motor and the fan shaft accurately and consistently for a long time, the connection part between the coupling and the shaft has become a high-incidence area of wear. According to authoritative statistical data, after continuous operation for 3000 hours, the wear amount of the traditional coupling usually reaches 0.5 - 1 mm. Such wear will lead to a significant decrease in transmission efficiency, and the average transmission efficiency loss is about 10% - 15%.

[0004] Frequent wear not only shortens the service life of the coupling, but also makes the coupling need to be replaced frequently. This not only increases the equipment maintenance cost, and the additional maintenance cost caused by the wear of the coupling is as high as tens of thousands of yuan per year, but also greatly prolongs the downtime, seriously affecting the production efficiency.

[0005] For example, the invention with the publication number CN105202043A discloses a plum blossom elastic coupling, and the main content is as follows: including a left half coupling, a right half coupling and a plum blossom elastic body; both the left half coupling and the right half coupling are provided with central holes, the end faces of the left half coupling and the right half coupling are both provided with plum blossom-shaped convex teeth, the central position of the plum blossom elastic body is provided with a cylindrical hole, both the left half coupling and the right half coupling are provided with convex platforms and are located inside the convex teeth, the two side faces of the convex teeth are concave arcs, the plum blossom-shaped elastic body is installed between the left half coupling and the right half coupling, and the cylindrical convex platform of the plum blossom-shaped elastic body is installed in the gap between the convex teeth of the left half coupling and the right half coupling.

[0006] However, in terms of the installation and disassembly process of the existing fan coupling, the installation of the traditional coupling has extremely high precision requirements and requires precise alignment. This operation often relies on professional installation tools and experienced technicians, and the average installation time is 4 - 6 hours each time. The disassembly process is also cumbersome and complex, and it is easy to damage other components of the equipment accidentally during the disassembly process, further increasing the difficulty and cost of equipment maintenance.

[0007] Therefore, in view of the deficiencies of these existing technologies, it is necessary to provide a fan coupling with a simple structure, reliable connection, convenient installation and disassembly, and capable of reducing vibration and noise. Summary of the Invention

[0008] The object of the present invention is to provide a fan coupling to overcome the defects of the existing technologies, such as complex structure, cumbersome installation and disassembly, poor connection stability, and high cost of later maintenance.

[0009] The object of the present invention can be achieved by the following technical solutions:

[0010] A fan coupling is used to connect the main shaft of a fan. One end of the coupling is provided with an installation groove. One end of the main shaft of the fan close to the coupling is provided with an installation section that matches the installation groove. A connection key is arranged between the installation section and the installation groove. Along the axial direction, a connection screw is provided at one end of the coupling close to the main shaft of the fan. The connection screw passes through the installation groove and is fixed on the end face of the installation section.

[0011] Preferably, an elastic buffer pad is arranged in the installation groove. The elastic buffer pad matches the shape of the installation groove and is fixed against the side wall of the installation groove. The elastic buffer pad covers the outside of the installation section.

[0012] Preferably, a positioning groove is arranged at the bottom of the installation groove. The positioning groove is coaxially arranged with the installation groove. One end of the elastic buffer pad close to the coupling is provided with a positioning protrusion that matches the positioning groove. The positioning protrusion is in clearance fit with the positioning groove.

[0013] Preferably, the elastic buffer pad is a multi-layer composite structure, including a supporting inner layer, an energy-absorbing middle layer, and an elastic outer layer from the inside to the outside. The energy-absorbing middle layer covers the outside of the supporting inner layer, and the elastic outer layer covers the outside of the energy-absorbing middle layer.

[0014] Preferably, the material of the elastic outer layer is silicone rubber, which is used to absorb the vibration and impact between the coupling and the main shaft of the fan. The material of the energy-absorbing middle layer is polyurethane, which is used to consume the energy generated by vibration. The supporting inner layer is a metal skeleton, which is used to support the elastic buffer pad.

[0015] Preferably, the number of the connection keys is multiple, and each connection key is evenly distributed around the installation section.

[0016] Preferably, a first key groove that matches the connection key is arranged on the circumferential side of the installation section, and a second key groove that matches the connection key is arranged on the inner side wall of the installation groove. The two ends of the connection key are respectively clamped in the first key groove and the second key groove.

[0017] Preferably, the coupling further includes a connection shaft and an installation shaft that are coaxially connected. The installation groove is opened at one end of the installation shaft far from the connection shaft. The diameter of the installation shaft is larger than that of the connection shaft. A threaded through hole that matches the connection screw is arranged on the end face of the installation shaft close to the connection shaft, and a threaded groove corresponding to the threaded through hole is arranged on the end face of the installation section. The connection screw is installed in the threaded through hole and the threaded groove.

[0018] Preferably, the number of the connecting screws is multiple, and the connecting screws are distributed in a circumferential array. The circle where the connecting screws are located is coaxially arranged with the main shaft of the fan.

[0019] Preferably, the installation section and the installation groove are in interference fit.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) Compared with the traditional single connection form, in this solution, a connection key is arranged between the main shaft of the fan and the coupling for circumferential installation, and the connecting screws are used for axial installation. This not only facilitates the installation and positioning of the coupling, but also when the fan is running, the two connection methods work together to effectively disperse the torque of the rotation of the main shaft of the fan, further enhancing the connection strength and improving the stability and reliability of the connection. And the connection structure between the coupling and the main shaft of the fan is simple, easy to install and disassemble, convenient for later maintenance, and reduces the later maintenance cost.

[0022] (2) In this solution, an elastic buffer pad is installed at the connection part of the coupling. The elastic buffer pad is made of a special rubber material and has good elasticity and wear resistance. It can effectively absorb the vibration energy generated during the operation of the fan, reduce the impact on the coupling and the shaft, and thus reduce wear. Under the same operating conditions, the wear amount of this coupling is reduced by about 60% compared with the traditional coupling, greatly prolonging the service life of the coupling and reducing the replacement frequency and maintenance cost.

[0023] (3) In this solution, an elastic buffer pad with a multi-layer composite structure is designed, which is composed of material layers with different hardness and elastic modulus. The elastic outer layer is made of a high-elastic rubber material for absorbing high-frequency vibration and impact; the energy-absorbing intermediate layer is made of a polyurethane material with good damping performance to consume vibration energy; the supporting inner layer is made of a high-strength metal skeleton to provide support and stiffness. This multi-layer composite structure can exert excellent buffering, shock absorption and noise reduction effects at different frequencies and loads, effectively reducing the torsional vibration and axial vibration of the shafting during the operation of the fan. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the coupling connection provided by the present invention;

[0025] Figure 2 is Figure 1 a partial enlarged schematic diagram of

[0026] In the figure: 1, main shaft of the fan; 2, coupling; 3, connection key; 4, connecting screw; 5, elastic buffer pad; 11, installation section; 21, installation groove; 22, positioning groove; 23, connection shaft; 24, installation shaft; 51, positioning protrusion. Detailed Embodiments

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0029] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0032] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0033] Embodiment 1

[0034] Such as Figure 1 And Figure 2As shown in the figure, this embodiment provides a fan coupling for connecting the main shaft 1 of the fan. It is characterized in that one end of the coupling 2 is provided with an installation groove 21, and one end of the main shaft 1 of the fan close to the coupling 2 is provided with an installation section 11 that matches the installation groove 21. A connection key 3 is provided between the installation section 11 and the installation groove 21; along the axial direction, a connection screw 4 is provided at one end of the coupling 2 close to the main shaft 1 of the fan. The connection screw 4 passes through the installation groove 21 and is fixed on the end face of the installation section 11.

[0035] Working principle: An installation groove 21 is provided at one end of the coupling 2, and an installation section 11 is provided at one end of the main shaft 1 of the fan. The installation section 11 is fixed in the installation groove 21, a connection key 3 is provided between the installation section 11 and the installation groove 21, and a connection screw 4 is provided between the coupling 2 and the installation section 11. The connection screw 4 passes through the installation groove 21 and is fixed on the end face of the installation section 11. The circumferential and axial installation of the connector 2 and the main shaft 1 of the fan is realized through the cooperation of the connecting piece 3 and the connection screw 4.

[0036] Compared with the traditional single connection form between the coupling and the main shaft, by arranging a connection key 3 between the main shaft 1 of the fan and the coupling 2 for circumferential installation and cooperating with the connection screw 4 for axial installation, it is not only convenient for the installation and positioning of the coupling 2, but also when the fan is running, the two connection methods work together, which can effectively disperse the torque of the rotation of the main shaft 1 of the fan, further enhance the connection strength, and improve the stability and reliability of the connection. And the connection structure between the coupling 2 and the main shaft 1 of the fan is simple, the installation and disassembly are convenient, which is convenient for later maintenance and reduces the later maintenance cost. This coupling structure makes the installation and disassembly process more convenient. The installation time is shortened to 2 - 3 hours, and the disassembly time is also correspondingly reduced, improving the work efficiency.

[0037] Preferred implementation method: An elastic buffer pad 5 is provided in the installation groove 21. The elastic buffer pad 5 matches the shape of the installation groove 21 and is fixed against the side wall of the installation groove 21. The elastic buffer pad 5 covers the outside of the installation section 11.

[0038] An elastic buffer pad is installed at the coupling connection part. This elastic buffer pad is made of a special rubber material and has good elasticity and wear resistance. It can effectively absorb the vibration energy generated during the operation of the fan, reduce the impact on the coupling and the shaft, thereby reducing wear. Under the same operating conditions, the wear amount of this coupling is reduced by about 60% compared with the traditional coupling, greatly extending the service life of the coupling, reducing the replacement frequency and maintenance cost.

[0039] Furthermore, a positioning groove 22 is provided at the bottom of the installation groove 21. The positioning groove 22 is coaxially arranged with the installation groove 21. A positioning protrusion 51 that matches the positioning groove 22 is provided at one end of the elastic buffer pad 5 close to the coupling 2. The positioning protrusion 51 is in clearance fit with the positioning groove 21. By means of the cooperation between the positioning groove 22 in the installation groove 21 and the positioning protrusion 51 on the elastic buffer pad 5, a precise positioning fit is formed at the connection part between the elastic buffer pad 5, the coupling 2 and the fan main shaft 1, preventing the buffer pad from shifting and misaligning during installation and operation.

[0040] In this embodiment, in addition to considering conventional materials such as rubber, polyurethane, and metal rubber for the material of the elastic buffer pad 5, new polymer composite materials and intelligent materials are introduced. For industrial environments with high temperature and high dust, a heat-resistant silicone rubber buffer pad can be selected, whose working temperature range can reach -50°C to 200°C, and it has good aging resistance and dust erosion resistance.

[0041] In a preferred embodiment, the elastic buffer pad 5 is a multi-layer composite structure, which includes a support inner layer, an energy-absorbing middle layer, and an elastic outer layer from the inside to the outside. The energy-absorbing middle layer is coated on the outside of the support inner layer, and the elastic outer layer is coated on the outside of the energy-absorbing middle layer.

[0042] Furthermore, the material of the elastic outer layer is silicone rubber, which is used to absorb the vibration and impact between the coupling 2 and the fan main shaft 1. The material of the energy-absorbing middle layer is polyurethane, which is used to consume the energy generated by vibration. The support inner layer is a metal skeleton, which is used to support the elastic buffer pad 5.

[0043] The elastic buffer pad 5 with a multi-layer composite structure is composed of material layers with different hardnesses and elastic moduli stacked together. The elastic outer layer uses a highly elastic rubber material to absorb high-frequency vibration and impact; the energy-absorbing middle layer uses a polyurethane material with good damping performance to consume vibration energy; the support inner layer uses a high-strength metal skeleton to provide support and stiffness. This multi-layer composite structure can exert excellent buffering, shock absorption, and noise reduction effects under different frequencies and loads, effectively reducing the torsional vibration and axial vibration of the shafting during the operation of the fan.

[0044] Preferably, the number of the connection keys 3 is multiple, and each connection key 3 is evenly distributed around the installation section 11.

[0045] In this embodiment, the type of key is selected according to the actual operating conditions and load characteristics of the fan. When the fan is operating at high speed and with high precision, and the requirement for the alignment between the shaft and the coupling is extremely high, a high-precision flat key, such as a thin flat key, can be selected. It has a high manufacturing precision and can effectively reduce the vibration and noise caused by the clearance on the key side. For the working conditions with alternating loads or impact loads, a feather key or a sliding key can be used, which allows a certain axial movement between the shaft and the coupling to compensate for the shafting expansion caused by factors such as temperature changes and avoid excessive additional stress on the key. When the torque transmitted by the main shaft of the fan is large and there is a large radial load, the symmetric angle of the key can be adjusted to 120°, so that the three keys are evenly distributed. The number of keys can be increased according to the actual situation, so as to more reasonably distribute the load, reduce the stress concentration of a single key, and improve the bearing capacity of the key connection system. At the same time, a 45° chamfer is designed at the end of the key to facilitate the installation and disassembly of the key and reduce the friction and damage between the key and the edge of the keyway.

[0046] Specifically, a first keyway matching the connecting key 3 is provided on the circumferential side of the installation section 11, and a second keyway matching the connecting key 3 is provided on the inner side wall of the installation groove 21. The two ends of the connecting key 3 are respectively clamped in the first keyway and the second keyway.

[0047] Regarding the machining precision of the keyway, in this embodiment, a numerical control machining center is used for precision machining to ensure that the dimensional accuracy, position accuracy, and surface roughness of the keyway meet the requirements of high-precision fitting. The parallelism error of the two side surfaces of the keyway is controlled within 0.02 mm, and the surface roughness Ra ≤ 1.6 μm, so as to improve the fitting tightness between the connecting key and the keyway, enhance the reliability of the key connection between the main shaft 1 of the fan and the coupling 2, and reduce the looseness and wear of the key during the torque transmission process.

[0048] In this embodiment, the coupling 2 further includes a connecting shaft 23 and an installation shaft 24 that are coaxially connected. The installation groove 21 is opened at one end of the installation shaft 24 away from the connecting shaft 23. The diameter of the installation shaft 24 is larger than that of the connecting shaft 23. A threaded through hole matching the connecting screw 4 is provided on the axial end surface of the installation shaft 24 close to the connecting shaft 23, and a threaded groove corresponding to the threaded through hole is provided on the end surface of the installation section 11. The connecting screw 4 is installed in the threaded through hole and the threaded groove.

[0049] Among them, the number of the connecting screws 4 is multiple, and the connecting screws 4 are arranged in a circumferential array. The circle where the connecting screws 4 are located is coaxially arranged with the main shaft 1 of the fan.

[0050] Optionally, the installation section 11 is in interference fit with the installation groove 21. Through the interference fit between the installation section 11 and the installation groove 21, the installation and positioning of the fan main shaft 1 and the coupling 2 are carried out, which can preliminarily lock the connecting key 4, facilitate the subsequent installation of the connecting screw, and can further improve the reliability and stability of the installation of the fan main shaft 1 and the coupling 2, further reduce the wear of the coupling 2, and extend the service life.

[0051] It should be understood that in this embodiment, it lies in the connection structure between the coupling 2 and the fan main shaft 1. The connection structure between the other end of the coupling 2 and other rotating shafts can adopt key connection or other existing connection methods, which will not be emphasized here.

[0052] Specifically, when the fan is started and put into operation, the motor drives the fan main shaft to start rotating as the power source. In this process, the fan coupling device of the present invention realizes efficient and stable torque transmission through a unique connection method. Specifically, a composite connection method combining a central hole key connection and a bolt connection is adopted between the fan main shaft and the coupling. An inner hole is machined in the center of the fan main shaft, a keyway is provided on the inner hole wall, and a corresponding keyway is also provided on the side of the coupling that mates with the main shaft. And through two symmetrically arranged keys installed in the keyway, the central hole key connection between the main shaft and the coupling is realized. This key connection method can ensure the synchronous rotation of the main shaft and the coupling in the circumferential direction, so that the torque generated by the motor can be smoothly transmitted from the main shaft to the coupling.

[0053] At the same time, 6 M12 connecting bolts are evenly distributed on the coupling, and these bolts further enhance the connection strength and stability between the main shaft and the coupling. When the fan is running, the bolts can effectively prevent relative sliding between the main shaft and the coupling, ensuring the reliability of torque transmission.

[0054] During the operation of the fan, vibration will inevitably occur. To address this problem, an elastic buffer pad is installed at the connection part of the coupling. The elastic buffer pad is made of a special rubber material and has good elasticity and wear resistance. When the vibration is transmitted to the coupling, the elastic buffer pad can quickly exert its elastic characteristics, absorb the vibration energy and convert it into its own elastic deformation energy, thereby effectively reducing the impact of the vibration on the coupling and the shaft. This not only reduces the wear of the components, but also reduces the noise generated by the vibration, improving the stability and comfort of the equipment operation.

[0055] In addition, due to the adoption of a special connection method, multi-surface contact is achieved between the coupling and the shaft. This multi-surface contact design can evenly distribute the transmitted torque to each contact surface, avoiding the problem of local stress concentration, further ensuring that the connection of the coupling is more stable and reliable under high-load operating conditions, and guaranteeing the efficient and stable operation of the fan. The enhancement of connection stability and torque transmission capacity has increased the transmission efficiency by approximately 15% - 20%, effectively improving the working performance of the fan.

[0056] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A fan coupling for connecting the main shaft (1) of a fan, characterized in that, One end of the coupling (2) is provided with a mounting groove (21), and one end of the fan main shaft (1) close to the coupling (2) is provided with a mounting section (11) that matches the mounting groove (21). A connecting key (3) is provided between the mounting section (11) and the mounting groove (21); one end of the coupling (2) close to the fan main shaft (1) is provided with connecting screws (4) along the axial direction. The connecting screws (4) pass through the mounting groove (21) and are fixed on the end face of the mounting section (11).

2. The fan coupling according to claim 1, characterized in that, An elastic buffer pad (5) is provided in the mounting groove (21). The elastic buffer pad (5) matches the shape of the mounting groove (21) and is fixed against the side wall of the mounting groove (21). The elastic buffer pad (5) covers the outside of the mounting section (11).

3. The fan coupling according to claim 2, characterized in that, A positioning groove (22) is provided at the bottom of the mounting groove (21). The positioning groove (22) is coaxially arranged with the mounting groove (21). One end of the elastic buffer pad (5) close to the coupling (2) is provided with a positioning protrusion (51) that matches the positioning groove (22). The positioning protrusion (51) has a clearance fit with the positioning groove (21).

4. A fan coupling according to claim 2, characterized in that, The elastic buffer pad (5) is a multi-layer composite structure, including a supporting inner layer, an energy-absorbing middle layer, and an elastic outer layer from the inside to the outside. The energy-absorbing middle layer covers the outside of the supporting inner layer, and the elastic outer layer covers the outside of the energy-absorbing middle layer.

5. A fan coupling according to claim 4, characterized in that, The material of the elastic outer layer is silicone rubber, which is used to absorb the vibration and impact between the coupling (2) and the fan main shaft (1). The material of the energy-absorbing middle layer is polyurethane, which is used to consume the energy generated by vibration. The supporting inner layer is a metal skeleton, which is used to support the elastic buffer pad (5).

6. The fan coupling according to claim 1, wherein The number of the connecting keys (3) is multiple, and each connecting key (3) is evenly distributed around the mounting section (11).

7. The fan coupling according to claim 1, characterized in that, A first key groove that matches the connecting key (3) is provided on the circumferential side of the mounting section (11). A second key groove that matches the connecting key (3) is provided on the inner side wall of the mounting groove (21). The two ends of the connecting key (3) are respectively clamped in the first key groove and the second key groove.

8. A fan coupling according to claim 1, characterized in that, The coupling (2) further includes a connecting shaft (23) and a mounting shaft (24) that are coaxially connected. The mounting groove (21) is opened at one end of the mounting shaft (24) away from the connecting shaft (23). The diameter of the mounting shaft (24) is larger than that of the connecting shaft (23). A threaded through hole that matches the connecting screw (4) is provided on the axial end face of the mounting shaft (24) close to the connecting shaft (23). A threaded groove corresponding to the threaded through hole is provided on the end face of the mounting section (11). The connecting screw (4) is installed in the threaded through hole and the threaded groove.

9. The fan coupling according to claim 1, characterized in that The number of the connecting screws (4) is multiple, and each connecting screw (4) is arranged in a circumferential array. The circle where the connecting screws (4) are located is coaxially arranged with the fan main shaft (1).

10. A fan coupling according to claim 1, characterized in that, The mounting section (11) has an interference fit with the mounting groove (21).

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