Impeller of magnetic suspension high-speed centrifugal blower

Abstract

The utility model discloses an impeller of a magnetic suspension high-speed centrifugal blower, which belongs to the technical field of blower accessories and is characterized in that a shaft hole is formed in the center of the bottom of an impeller disc, a limiting groove and a clearance groove are respectively formed in two ends of the shaft hole, a connecting shaft is inserted into the inner wall of the shaft hole, and a limiting block is fixedly sleeved on the surface of the connecting shaft; according to the impeller of the magnetic suspension high-speed centrifugal blower, the blades can be rapidly positioned and locked through the positioning grooves, the positioning sleeves and the clamping grooves formed in the impeller disc, the blades are made to be of an assembly type structure, the assembly efficiency is improved, independent replacement of the blades in the later period is facilitated, and the assembly efficiency is improved. And through arrangement of a limiting groove, a locking rod, an anti-falling block and a fastener, the mounting positions of the impeller disc and the connecting shaft can be fixed in a multiple mode, so that it is guaranteed that the locking nut and the connecting shaft cannot axially move, and the working stability of the impeller is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blower accessories, and more specifically to an impeller of a magnetically suspended high-speed centrifugal blower. Background Art

[0002] The magnetic levitation high-speed centrifugal blower uses a magnetic levitation high-speed motor main shaft to directly cooperate with the impeller, driving the impeller to rotate to suck air from the collector and then discharge it into the volute. The blades of the impeller of commonly used centrifugal blowers are mostly fixedly welded to the surface of the impeller disk, which is not easy to position during the welding process and is not convenient for replacement after the blades are damaged. In addition, the impeller is fastened to the shaft by a nut, which is easy to loosen and strip, reducing the working stability of the impeller.

[0003] For example, publication number CN205478443U discloses a magnetic levitation high-speed centrifugal blower, which includes a magnetic levitation motor, a connecting plate, a volute, a collector, an impeller, a diffuser and a sealing disk. The magnetic levitation motor is connected to the volute through a connecting plate, and the motor shaft of the magnetic levitation motor is connected to the impeller through a locking rod.

[0004] It can be seen from the above-mentioned public scheme that the blades of the impeller are fixedly welded to the surface of the impeller disk. During the welding process, it is not easy to locate the welding position of each blade, and the fixed blades are not easy to replace after being damaged in the later stage, which may cause the entire impeller to be scrapped. In addition, the impeller is fixed by a locking rod and a locking nut. During the long-term high-speed rotation of the impeller, the locking nut is prone to stripping or loosening, which in turn causes shaking between the impeller and the locking rod, reducing the working stability of the impeller. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an impeller of a magnetic levitation high-speed centrifugal blower. The impeller of the magnetic levitation high-speed centrifugal blower can quickly position and lock each blade through the positioning grooves, positioning sleeves and clamping grooves provided on the impeller disc, so that the blades are an assembled structure, which not only improves the assembly efficiency, but also facilitates the individual replacement of the blades in the later stage. In addition, through the provided limit grooves, locking rods, anti-slip blocks and fasteners, the installation positions of the impeller disc and the connecting shaft can be multiply fixed, thereby ensuring that the locking nut and the connecting shaft will not move axially, greatly improving the working stability of the impeller.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] An impeller of a magnetic levitation high-speed centrifugal blower comprises an impeller disk, an axial hole is provided at the bottom center position of the impeller disk, a limiting groove and an avoidance groove are respectively provided at both ends of the axial hole, a connecting shaft is inserted into the inner wall of the axial hole, a limiting block is fixedly sleeved on the surface of the connecting shaft, the end face of the limiting block is in contact and extruded with the inner wall of the limiting groove, a locking nut is threadedly connected to the surface of the limiting block, a locking rod is threadedly connected to the side of the locking nut, an anti-slip block is inserted into the side of the connecting shaft, a fastener is threadedly connected to one end of the connecting shaft, a positioning groove is provided on the surface of the impeller disk, a blade is contacted and connected to the inner wall of the positioning groove, a positioning sleeve is clamped at one end of the blade, and a positioning sleeve is provided at the bottom The outer side of the positioning sleeve is fixedly sleeved with a fixing plate, the surface of the fixing plate is provided with a connecting hole, the surface of the impeller disk is provided with a bolt hole which is concentric and coaxial with the connecting hole, and bolts are sleeved in the bolt hole and the connecting hole. The impeller of the magnetic levitation high-speed centrifugal blower can quickly position and lock each blade through the positioning groove, positioning sleeve and positioning groove provided on the impeller disk, so that the blade is an assembled structure, which not only improves the assembly efficiency, but also facilitates the individual replacement of the blades in the later stage. In addition, the installation position of the impeller disk and the connecting shaft can be multi-fixed through the provided limit groove, locking rod, anti-slip block and fastener, thereby ensuring that the locking nut and the connecting shaft will not move axially, greatly improving the working stability of the impeller.

[0008] Furthermore, the inner wall of the slot contacts and squeezes the surface of one end of the blade, the slots are distributed in a circular shape with equal intervals, the number of the slots is the same as the positioning slots, and the shape of the slot matches the shape of one end of the blade. The slot can limit the upward movement of one end of the blade and prevent one end of the blade from shaking left and right.

[0009] Furthermore, a pad is provided at the bottom of the locking nut, and the pad is in contact and extrusion with the inner wall of the air avoidance groove, a through hole is connected to the side of the air avoidance groove, a threaded hole is provided on the side of the pad, and the air avoidance groove is used to accommodate the pad.

[0010] Furthermore, a countersunk groove is provided at one end of the through hole, the inner wall of the through hole is in contact with the surface of the locking rod, the surface of the locking rod is provided with an external thread matching the internal thread of the threaded hole, and the nut at one end of the locking rod is in the countersunk groove and will not protrude.

[0011] Furthermore, an anti-drop hole is provided on the side of the connecting shaft, the inner wall of the anti-drop hole is in contact and connected with the surface of the anti-drop block, a through hole is provided in the middle of the anti-drop block, and the anti-drop block is strip-shaped with a rectangular cross-section, which can prevent the connecting shaft from moving downward.

[0012] Furthermore, one end of the connecting shaft is provided with a threaded hole connected to the anti-dropping hole, the fastener is a screw, and the external thread on the surface of the screw matches the internal thread of the threaded hole, and one end of the fastener passes through the through hole to fix the position of the anti-dropping block.

[0013] Furthermore, the positioning grooves are distributed in a circular shape with equal intervals around the shaft hole. The positioning grooves can locate the assembly position of the blades, prevent one end of the blades from moving upward, and limit the left and right movement of the blades.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) This solution can quickly position and lock each blade through the positioning groove, positioning sleeve and locking groove set on the impeller disk, so that the blade is an assembled structure, which not only improves the assembly efficiency but also facilitates the individual replacement of the blades at a later time.

[0016] (2) This solution can perform multiple fixations on the installation positions of the impeller disc and the connecting shaft by means of the limit grooves, locking rods, anti-slip blocks and fasteners, thereby ensuring that the locking nut and the connecting shaft will not move axially, greatly improving the working stability of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the impeller disc structure of the utility model;

[0019] Figure 3 This is a bottom view of the positioning sleeve structure of the utility model;

[0020] Figure 4 It is a cross-sectional view of the connecting shaft structure of the utility model.

[0021] Description of the numbers in the figure:

[0022] 1 impeller disk, 11 shaft hole, 12 limit groove, 13 avoidance groove, 14 through hole, 15 positioning groove, 16 bolt hole, 2 blades, 3 positioning sleeve, 31 fixing plate, 32 connecting hole, 33 slot, 34 bolt, 4 connecting shaft, 41 limit block, 42 ​​threaded hole, 43 anti-drop hole, 5 locking nut, 6 locking rod, 7 anti-drop block, 8 fastener. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1

[0025] See also Figure 1-4 , an impeller of a magnetic levitation high-speed centrifugal blower, comprising an impeller disc 1, an axial hole 11 is provided at the bottom center position of the impeller disc 1, and a limiting groove 12 and an avoidance groove 13 are respectively provided at both ends of the axial hole 11, a connecting shaft 4 is inserted into the inner wall of the axial hole 11, and one end of the connecting shaft 4 is connected to the motor shaft of the magnetic levitation motor, thereby driving the impeller to rotate, which belongs to the prior art, one end of the connecting shaft 4 is provided with a threaded hole 42 connected to the anti-drop hole 43, the fastener 8 is a screw, and the external thread on the surface of the screw matches the internal thread of the threaded hole 42, one end of the fastener 8 passes through the through hole, and is used to fix the position of the anti-drop block 7, the surface of the connecting shaft 4 is fixedly sleeved with a limiting block 41, the end face of the limiting block 41 contacts and squeezes with the inner wall of the limiting groove 12, the surface of the limiting block 41 is threadedly connected with a locking nut 5, the side of the locking nut 5 is threadedly connected with a locking rod 6, and the side of the connecting shaft 4 is inserted There is an anti-slip block 7, one end of the connecting shaft 4 is connected with a fastener 8 through a thread, and the fastener 8 can prevent the locking nut 5 from slipping and loosening after the locking nut 5 is tightened. A positioning groove 15 is provided on the surface of the impeller disk 1. The positioning groove 15 is centered on the shaft hole 11 and is distributed in a ring with equal spacing. The positioning groove 15 can locate the assembly position of the blade 2 and prevent one end of the blade 2 from moving upward. At the same time, it can limit the left and right movement of the blade 2. The inner wall of the positioning groove 15 is in contact with the blade 2, and a positioning sleeve 3 is clamped at one end of the blade 2. A clamping groove 33 is provided at the bottom of the positioning sleeve 3, and a fixing plate 31 is fixedly sleeved on the outer side of the positioning sleeve 3. A connecting hole 32 is provided on the surface of the fixing plate 31, and a bolt hole 16 concentric and coaxial with the connecting hole 32 is provided on the surface of the impeller disk 1. Bolts 34 are sleeved in the bolt holes 16 and the connecting holes 32. The bolts 34 are used to connect and fasten the positioning sleeve 3 to the impeller disk 1.

[0026] The inner wall of the slot 33 is in contact and extrusion with the surface of one end of the blade 2. The slots 33 are distributed in a ring shape with equal intervals. The number of the slots 33 and the positioning slots 15 is the same. The shape of the slot 33 matches the shape of one end of the blade 2. The slot 33 can limit the upward movement of one end of the blade 2 and prevent one end of the blade 2 from shaking left and right. A pad is provided at the bottom of the locking nut 5, and the pad is in contact and extrusion with the inner wall of the air avoidance groove 13. The side of the air avoidance groove 13 is connected to a through hole 14, and the side of the pad is provided with a threaded hole. The air avoidance groove 13 is used to accommodate the pad.

[0027] A countersunk groove is provided at one end of the through hole 14, and the inner wall of the through hole 14 is in contact with the surface of the locking rod 6. The surface of the locking rod 6 is provided with an external thread matching the internal thread of the threaded hole. The nut at one end of the locking rod 6 is in the countersunk groove and will not protrude. An anti-dropout hole 43 is provided on the side of the connecting shaft 4, and the inner wall of the anti-dropout hole 43 is in contact with the surface of the anti-dropout block 7. A through hole is provided in the middle position of the anti-dropout block 7. The anti-dropout block 7 is in a strip shape with a rectangular cross-section, which can prevent the connecting shaft 4 from moving downward.

[0028] When assembling the impeller of the magnetic levitation high-speed centrifugal blower, first install the blade 2 into each positioning groove 15, then make the upper end of the blade 2 contact with the upper inner wall of the positioning groove 15, then push the positioning sleeve 3 downward to fit each blade 2, so that the lower end of the blade 2 is engaged with the corresponding slot 33, and then fasten the positioning sleeve 3 to the impeller disk 1 by the bolt 34, so as to complete the assembly of the blade 2, and then the connecting shaft 4 is passed through the shaft hole 11 from bottom to top, and in the process of the connecting shaft 4 moving upward, the limit block 41 is contacted and squeezed with the limit slot 12 to stop the upward movement of the connecting shaft 4, and then the locking nut 5 is tightened clockwise, and after the locking nut 5 is tightened, the side threaded hole is concentric and coaxial with the through hole 14, and then the locking rod 6 is inserted into the clockwise direction. The needle is tightened to fix the position of the locking nut 5, and then the anti-dropping block 7 is inserted into the anti-dropping hole 43, so that the middle through hole is concentric and coaxial with the threaded hole 42, and then the fastener 8 is inserted downward and tightened clockwise. Through the positioning groove 15, positioning sleeve 3 and card groove 33 set in the impeller disk 1, each blade 2 can be quickly positioned and locked, so that the blade 2 is an assembled structure, which not only improves the assembly efficiency, but also facilitates the individual replacement of the blade 2 in the later stage, and through the set limit groove 12, locking rod 6, anti-dropping block 7 and fastener 8, the installation position of the impeller disk 1 and the connecting shaft 4 can be multi-fixed, thereby ensuring that the locking nut 5 and the connecting shaft 4 will not move axially, greatly improving the working stability of the impeller.

[0029] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An impeller of a magnetically suspended high-speed centrifugal blower, comprising an impeller disk (1), characterized in that: The impeller disk (1) is provided with an axial hole (11) at the center of the bottom, and a limit groove (12) and an avoidance groove (13) are respectively provided at both ends of the axial hole (11). A connecting shaft (4) is inserted into the inner wall of the axial hole (11), and a limit block (41) is fixedly sleeved on the surface of the connecting shaft (4). The end surface of the limit block (41) is in contact and extruded with the inner wall of the limit groove (12). A locking nut (5) is threadedly connected to the surface of the limit block (41), and a locking rod (6) is threadedly connected to the side of the locking nut (5). An anti-slip block (7) is inserted into the side of the connecting shaft (4). ) is connected to a fastener (8) via a thread, a positioning groove (15) is provided on the surface of the impeller disk (1), the inner wall of the positioning groove (15) is in contact with a blade (2), one end of the blade (2) is clamped with a positioning sleeve (3), a clamping groove (33) is provided at the bottom of the positioning sleeve (3), a fixing plate (31) is fixedly sleeved on the outer side of the positioning sleeve (3), a connecting hole (32) is provided on the surface of the fixing plate (31), a bolt hole (16) is provided on the surface of the impeller disk (1) which is concentric and coaxial with the connecting hole (32), and bolts (34) are sleeved in the bolt hole (16) and the connecting hole (32).

2. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 1, characterized in that: The inner wall of the clamping groove (33) contacts and squeezes the surface of one end of the blade (2); the clamping grooves (33) are distributed in an annular shape with equal spacing; the number of the clamping grooves (33) is the same as that of the positioning grooves (15); and the shape of the clamping groove (33) matches the shape of one end of the blade (2).

3. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 1, characterized in that: A cushion block is provided at the bottom of the locking nut (5), and the cushion block is in contact and extrusion with the inner wall of the air avoidance groove (13); a through hole (14) is connected to the side of the air avoidance groove (13), and a threaded hole is provided on the side of the cushion block.

4. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 3, characterized in that: One end of the through hole (14) is provided with a countersunk groove, the inner wall of the through hole (14) is in contact with the surface of the locking rod (6), and the surface of the locking rod (6) is provided with an external thread matching the internal thread of the threaded hole.

5. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 1, characterized in that: An anti-drop hole (43) is provided on the side of the connecting shaft (4), the inner wall of the anti-drop hole (43) is in contact with and connected to the surface of the anti-drop block (7), and a through hole is provided in the middle of the anti-drop block (7).

6. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 1, characterized in that: One end of the connecting shaft (4) is provided with a threaded hole (42) connected to the anti-drop hole (43); the fastener (8) is a screw rod, and the external thread on the surface of the screw rod matches the internal thread of the threaded hole (42).

7. The impeller of a magnetically suspended high-speed centrifugal blower according to claim 1, characterized in that: The positioning grooves (15) are centered on the shaft hole (11) and are distributed in a ring shape at equal intervals.

Images