A detachable fan impeller

Abstract

The utility model relates to the field of fan impellers, and discloses a detachable fan impeller, including a wheel disc, a connecting block connected to an external motor drive shaft is fixedly arranged in the middle of one side of the wheel disc, a blade is arranged between the connecting block and the wheel disc, and a protective plate is fitted on the side of the blade located in front of the rotation direction of the connecting block. The utility model fits the protective plate on the side of the blade located in front of the rotation direction of the connecting block, and screws in and tightens the first bolt in sequence to fix the protective plate on the blade, so that when the blade rotates, the impurity particles in the gas will collide with the protective plate to avoid damage to the blade, thereby solving the problem of short service life of the blades of the existing fan impeller.

Description

Technical Field

[0001] The utility model relates to the field of fan impellers, in particular to a detachable fan impeller. Background Art

[0002] The impeller is the main component of the fan. Its geometry, size, number of impeller blades and manufacturing accuracy have a great influence on its performance. The impeller must be statically balanced or dynamically balanced to ensure the smooth rotation of the fan.

[0003] When the fan conveys gas with high dust concentration, the impeller blades are prone to wear. Long-term wear will cause the impeller blades to be worn through. After the impeller blades are worn through, impurities enter the impeller blades, causing the impeller to lose balance and vibrate. This will cause the impeller to age faster after vibration and shorten its service life.

[0004] Since most impellers are integrated impellers, once any blade is damaged, the entire impeller must be replaced, which greatly increases the cost of use. Therefore, it is necessary to propose a detachable fan impeller to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a detachable fan impeller to solve the above-mentioned problems that the blades of the existing fan impeller have a short service life, are troublesome to replace and are costly.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detachable fan impeller, comprising a wheel disc, a connecting block connected to an external motor drive shaft is fixedly arranged in the middle of one side of the wheel disc, a blade is arranged between the connecting block and the wheel disc, a protective plate is fitted on the side of the blade located in front of the rotation direction of the connecting block, a first threaded hole is fixedly arranged in the middle of the protective plate and the blade, a first bolt is threadedly connected between the two first threaded holes, the head of the first bolt is located on the side of the blade away from the protective plate, one end of the first bolt movably passes through the two side surfaces of the protective plate and is threadedly sleeved with a first protective cover, and the first protective cover and the protective plate fit each other;

[0007] The protective plate is made of medium and low alloy wear-resistant steel material, and the side of the protective plate away from the blade is evenly coated with a hot-dip galvanized layer;

[0008] The blades are fixed on the wheel disc via a fixing assembly.

[0009] Preferably, the fixing assembly includes a fixing rod, the connecting block is a regular hexagonal column structure, a clamping plate is fixedly provided at one end of the blade close to the connecting block, the clamping plate and the blade are integrally formed, a clamping groove that engages with the clamping plate is provided on the connecting block, the fixing rod is fixedly provided at the top close to the edge of the wheel disc, the fixing rod and the blade are fixedly connected by a second bolt, and six of the clamping grooves, clamping plates, blades and fixing rods are evenly distributed in a ring with the center of the wheel disc as the center point.

[0010] Preferably, the fixing assembly also includes a pressure plate, which is movably fitted on the connecting block, and the edge of the pressure plate and the edge of the connecting block overlap with each other, the pressure plate and the clamping plate are movably fitted together, and a plurality of second threaded holes are provided on the pressure plate and the connecting block, and a third bolt is threadedly connected between the two corresponding second threaded holes.

[0011] Preferably, six evenly distributed limiting grooves in an annular shape are fixedly opened on one surface of the wheel disc close to the connecting block, and the bottoms of the blades are inserted into the limiting grooves and engaged with the limiting grooves.

[0012] Preferably, the blade is in an arc-shaped structure, and the edge of the blade away from the end of the clamping plate and the edge of the wheel disc are on the same vertical plane.

[0013] Preferably, the head of the second bolt is located on the side of the fixing rod away from the blade, and the second bolt is movably passed through the two side surfaces of the blade and a second protective cover is provided on one end of the threaded sleeve.

[0014] Preferably, the upper surfaces of the blades, the fixing rod and the pressure plate are all on the same horizontal plane.

[0015] Preferably, an elastic plate having a triangular shape in horizontal cross section is fixedly provided on the side wall inside the slot.

[0016] The technical effects and advantages of the utility model are as follows: the protective plate is fitted onto the side of the blade in front of the rotation direction of the connecting block, the positions of the two first threaded holes are made to correspond, and the first bolts are screwed in and tightened in sequence to fix the protective plate on the blade. As a result, when the blade rotates, impurity particles in the gas will collide with the protective plate to avoid damage to the blade, thus solving the problem of short service life of the blades of the existing fan impeller.

[0017] The protective plate is made of medium and low alloy wear-resistant steel materials, which is light and wear-resistant, and has little effect on the deadweight of the impeller, thereby not increasing the energy consumption of the motor. In addition, when the conveying gas contains water vapor, it is easy to corrode the protective plate and blades. Therefore, a hot-dip galvanized layer is evenly coated on the side of the protective plate away from the blades. When the protective plate is damaged, the first bolt can be unscrewed to remove the protective plate, which is convenient for the installation and removal of the protective plate.

[0018] By installing the first protective cover and the second protective cover, the problem of the thread ends of the first bolt and the second bolt being hit and thus causing the thread paths to be damaged is avoided.

[0019] When one of the blades is damaged, the blade can be removed by unscrewing the second bolt, thereby solving the problem that the existing impeller is an integrated impeller and the entire impeller must be replaced once any blade is damaged, thereby greatly increasing the cost of use.

[0020] By installing the limit grooves and elastic plates, the stability of the installation of the blades and the card plate is improved and the vibration amplitude is reduced, thereby reducing the noise of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of a detachable three-dimensional structure of a fan impeller.

[0022] Figure 2 This is a schematic diagram of the structure of the fixing component of the utility model.

[0023] Figure 3 This is a schematic diagram of the blade and protective plate structure of the utility model.

[0024] Figure 4 It is a schematic diagram of the horizontal cross-section structure of the elastic plate of the utility model.

[0025] In the figure: 1. wheel disc; 2. connecting block; 3. blade; 4. protective plate; 5. first bolt; 6. first protective cover; 7. slot; 8. clamping plate; 9. limit slot; 10. fixing rod; 11. second bolt; 12. second protective cover; 13. pressure plate; 14. second threaded hole; 15. elastic plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides Figure 1-Figure 4 A detachable fan impeller shown includes a wheel disc 1, a connecting block 2 connected to an external motor drive shaft is fixedly arranged in the middle of one side of the wheel disc 1, blades 3 are arranged between the connecting block 2 and the wheel disc 1, and six blades 3 are evenly distributed in a ring with the center of the wheel disc 1 as the center point. After the motor on the fan is started, the impeller inside the chassis is driven to rotate, and the rotation of the six blades 3 provides power for the wind, which facilitates the fan to transport gas.

[0028] Considering that when the fan conveys gas with high dust concentration, the blades 3 on the impeller are prone to wear, and long-term wear will cause the blades 3 to be worn through. After the blades 3 are worn through, impurities enter the inside of the blades 3, causing the blades 3 to lose balance and vibrate. This makes the impeller age faster after vibration, and the service life of the impeller is shortened. Therefore, the utility model is provided with a protective plate 4 on the side of the blade 3 located in front of the rotation direction of the connecting block 2, and the protective plate 4 and the middle of the blade 3 are fixedly provided with a first threaded hole, and a first bolt 5 is threadedly connected between the two first threaded holes, and the head of the first bolt 5 is located on the side of the blade 3 away from the protective plate 4.

[0029] Specifically, the protective plate 4 is fitted onto the side of the blade 3 that is located in front of the connection block 2 in the direction of rotation, so that the two first threaded holes are positioned correspondingly, and then the first bolts 5 are screwed in and tightened in sequence to fix the protective plate 4 on the blade 3. As a result, when the blade 3 rotates, impurity particles in the gas will collide with the protective plate 4, thus preventing the blade 3 from being damaged, thereby solving the problem of short service life of the blade 3 of the existing fan impeller.

[0030] The protective plate 4 is made of medium and low alloy wear-resistant steel material, which is light and wear-resistant, and has little effect on the deadweight of the impeller, thereby not increasing the energy consumption of the motor. In addition, when the conveying gas contains water vapor, it is easy to corrode the protective plate 4 and the blades 3. Therefore, a hot-dip galvanized layer is evenly coated on the side of the protective plate 4 away from the blades 3. When the protective plate 4 is damaged, the first bolt 5 is unscrewed to remove the protective plate 4, which is convenient for the installation and removal of the protective plate 4.

[0031] Considering that the thread path of the threaded end of the first bolt 5 will be damaged after being hit by gas particles, it is difficult to unscrew it from the blade 3 and the protective plate 4. Therefore, a first protective cover 6 is provided on the threaded sleeve at one end of the first bolt 5 that passes through the two sides of the protective plate 4. The first protective cover 6 and the protective plate 4 fit together. The protection of the first protective cover 6 can prevent the threaded end of the first bolt 5 from being hit and causing damage to the thread path. When removing the first bolt 5, just unscrew the first protective cover 6.

[0032] Furthermore, the blade 3 is fixed to the wheel disc 1 through a fixing component, the fixing component includes a fixing rod 10, the connecting block 2 is a regular hexagonal column structure, a clamping plate 8 is fixedly provided at one end of the blade 3 close to the connecting block 2, the clamping plate 8 and the blade 3 are integrally formed, and a clamping groove 7 which is engaged with the clamping plate 8 is provided on the connecting block 2. The fixing rod 10 is fixedly provided at the top close to the edge of the wheel disc 1, and the fixing rod 10 and the blade 3 are fixedly connected by a second bolt 11. There are six clamping grooves 7, clamping plates 8 and fixing rods 10 evenly distributed in a ring with the center of the wheel disc 1 as the center point.

[0033] Specifically, when fixing the blade 3, the clamping plate 8 is clamped in the clamping groove 7 so that the bottom of the blade 3 and the wheel disc 1 are in contact with each other, one end of the blade 3 is limited, and then the second bolt 11 is screwed into the fixing rod 10 and the blade 3 in turn, so as to fix the other end of the blade 3, thereby completing the fixed installation of the blade 3. When one of the blades 3 is damaged, the second bolt 11 is unscrewed to remove the blade 3, thereby solving the problem that the existing impeller is an integrated impeller. Once any blade 3 is damaged, the entire impeller must be replaced, thereby greatly increasing the cost of use.

[0034] Similar to the first bolt 5, the head of the second bolt 11 is located on the side of the fixing rod 10 away from the blade 3. The second bolt 11 is movable through the two side surfaces of the blade 3 and a second protective cover 12 is provided on one end of the threaded sleeve. By installing the second protective cover 12, the threaded end of the second bolt 11 is prevented from being hit and causing damage to the thread path.

[0035] Taking into account that when the impeller is a semi-closed structure, there is no limiting structure on the top of the clamping plate 8, which may easily cause the blade 3 to tilt. Therefore, the fixing assembly also includes a pressure plate 13, which is movably fitted on the connecting block 2, and the edge of the pressure plate 13 and the edge of the connecting block 2 overlap with each other. The pressure plate 13 and the clamping plate 8 are movably fitted, and a plurality of second threaded holes 14 are provided on the pressure plate 13 and the connecting block 2. A third bolt is threadedly connected between the two corresponding second threaded holes 14. By installing the pressure plate 13, the top of the clamping plate 8 is pressed down, thereby preventing the blade 3 from tilting.

[0036] Furthermore, the blade 3 is in an arc-shaped structure, and the edge of the blade 3 away from the clamping plate 8 and the edge of the wheel disc 1 are on the same vertical plane, thus preventing gas from leaking from the gap between the blade 3 and the chassis and affecting the gas transportation efficiency.

[0037] Furthermore, six annular and evenly distributed limiting grooves 9 are fixedly provided on one surface of the wheel disc 1 close to the connecting block 2. The bottom of the blade 3 is inserted into the limiting groove 9 and engages with the limiting groove 9. This arrangement facilitates limiting the bottom of the blade 3, making the installation of the blade 3 more stable, reducing the vibration amplitude of the blade 3, and reducing the noise of the equipment.

[0038] Furthermore, the upper surfaces of the blades 3, the fixing rod 10 and the pressure plate 13 are all on the same horizontal plane. If it is necessary to transform the semi-closed impeller into a fully closed impeller, such an arrangement makes it easier for the surface of the other wheel disc 1 to fit with the surfaces of the blades 3 and the fixing rod 10, thereby avoiding gas leakage and affecting the gas delivery efficiency.

[0039] Furthermore, due to production technology limitations, there is a certain gap between the card plate 8 and the card slot 7. Therefore, an elastic plate 15 with a triangular shape in a horizontal cross section is fixedly provided on the side wall inside the card slot 7. When the card plate 8 is inserted into the card slot 7, the elastic plate 15 is gradually compressed and exerts pressure on the card plate 8 in the reverse direction, so that the installation of the card plate 8 is more stable and the vibration amplitude is reduced.

Claims

1. A detachable fan impeller, comprising a wheel disc (1), characterized in that: A connecting block (2) connected to an external motor drive shaft is fixedly provided in the middle of one side of the wheel disc (1), a blade (3) is provided between the connecting block (2) and the wheel disc (1), a protective plate (4) is provided on the blade (3) at a side located in front of the connecting block (2) in the rotation direction, a first threaded hole is fixedly provided in the middle of the protective plate (4) and the blade (3), a first bolt (5) is threadedly connected between the two first threaded holes, a head of the first bolt (5) is located on a side of the blade (3) away from the protective plate (4), one end of the first bolt (5) is threadedly sleeved with a first protective cover (6) which is movably passed through the two side surfaces of the protective plate (4), and the first protective cover (6) and the protective plate (4) are fitted with each other; The protective plate (4) is made of a medium-low alloy wear-resistant steel material, and a side of the protective plate (4) away from the blade (3) is evenly coated with a hot-dip galvanized layer; The blades (3) are fixed on the wheel disc (1) via a fixing assembly.

2. A detachable fan impeller according to claim 1, characterized in that: The fixing assembly comprises a fixing rod (10); the connecting block (2) is in a regular hexagonal column structure; a clamping plate (8) is fixedly arranged at one end of the blade (3) close to the connecting block (2); the clamping plate (8) and the blade (3) are integrally formed; a clamping groove (7) is provided on the connecting block (2) and is engaged with the clamping plate (8); the fixing rod (10) is fixedly arranged at the top close to the edge of the wheel disc (1); the fixing rod (10) and the blade (3) are fixedly connected by a second bolt (11); and six of the clamping grooves (7), the clamping plate (8), the blade (3) and the fixing rod (10) are evenly distributed in a ring with the center of the wheel disc (1) as the center point.

3. A detachable fan impeller according to claim 2, characterized in that: The fixing assembly further comprises a pressure plate (13), wherein the pressure plate (13) is movably fitted on the connecting block (2), and the edge of the pressure plate (13) and the edge of the connecting block (2) overlap each other, the pressure plate (13) and the clamping plate (8) are movably fitted together, and a plurality of second threaded holes (14) are provided on the pressure plate (13) and the connecting block (2), and a third bolt is threadedly connected between two corresponding second threaded holes (14) at the top and the bottom.

4. A detachable fan impeller according to claim 3, characterized in that: Six evenly distributed limiting grooves (9) are fixedly provided on a surface of the wheel disc (1) close to the connecting block (2), and the bottom of the blade (3) is inserted into the limiting groove (9) and engaged with the limiting groove (9).

5. A detachable fan impeller according to claim 4, characterized in that: The blade (3) has an arc-shaped structure, and the edge of the blade (3) at one end away from the clamping plate (8) and the edge of the wheel disc (1) are on the same vertical plane.

6. A detachable fan impeller according to claim 5, characterized in that: The head of the second bolt (11) is located on a side of the fixing rod (10) away from the blade (3); one end of the second bolt (11) is movably passed through two side surfaces of the blade (3) and is threadedly sleeved with a second protective cover (12).

7. A detachable fan impeller according to claim 6, characterized in that: The upper surfaces of the blade (3), the fixing rod (10) and the pressure plate (13) are all on the same horizontal plane.

8. The detachable fan impeller according to claim 2, characterized in that: An elastic plate (15) having a triangular shape in horizontal cross section is fixedly arranged on the side wall inside the slot (7).

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