Split type axial impeller

Abstract

This application relates to a split-type axial flow impeller, including a disc, a hub, blades, a pressure block, and a connecting member. The hub is coaxially mounted on the disc, and a connecting handle is fixedly mounted on the blade. The connecting handle passes through the hub radially upwards along the disc and is rotatably connected to the hub. The pressure block is pressed onto the connecting handle axially along the disc. The connecting member detachably connects the pressure block, connecting handle, hub, and disc in series, and multiple pressure blocks and blades are provided. When it is necessary to adjust the blade angle, the connecting member is loosened, thereby detaching the connection between the pressure block, connecting handle, hub, and disc. The blade is then rotated to adjust to the appropriate angle, and the connecting member is tightened again to fix the blade angle at this time. This achieves the purpose of adjusting the angle of a single blade, which is simple to operate and does not affect the position of other blades.

Description

Technical Field

[0001] This application relates to the field of rail transit ventilation fans, and in particular to a split-type axial flow impeller. Background Technology

[0002] The impellers of existing axial flow fans used in high-speed trains are basically divided into two types: cast integral type and blade-hub separate assembly type. Among them, the separate assembly type impeller has the advantages of adjustable blade angle and replaceable blades.

[0003] However, existing split impellers fix all blades with a shared upper and lower hub. When adjusting the blade angle, all blades can only be disassembled or all blades can be locked, which makes the assembly process difficult. Furthermore, the mounting bolts of split impellers have no anti-disassembly structure, and there is a risk that the impeller can be disassembled and adjusted by non-professionals. Summary of the Invention

[0004] To meet the requirement of individually adjustable axial flow impeller blades, this application provides a split-type axial flow impeller.

[0005] The split-type axial flow impeller provided in this application adopts the following technical solution:

[0006] A split-type axial flow impeller includes a disc, a hub, blades, a pressure block, and a connecting member; the hub is coaxially mounted on the disc, and a connecting handle is fixedly provided on the blades. The connecting handle passes through the hub radially along the disc and is rotatably connected to the hub; the pressure block is pressed onto the connecting handle axially along the disc; the connecting member connects the pressure block, the connecting handle, the hub, and the disc in a detachable manner, and multiple pressure blocks and blades are provided.

[0007] Preferably, the connector includes a connecting bolt and a locking nut; the connecting bolt passes through the pressure block, the hub and the disc in sequence, connecting the pressure block, the connecting handle, the hub and the disc in series; the locking nut is screwed onto the connecting bolt and simultaneously pressed onto the adjacent pressure block.

[0008] Preferably, it also includes an anti-disassembly component, which includes an anti-disassembly cap and an anti-disassembly pin that are sleeved on the locking nut along the axial direction of the connecting bolt; the locking nut is provided with a limiting surface in the circumferential direction to prevent the anti-disassembly cap from rotating circumferentially; the pressure block is provided with a connecting hole, the anti-disassembly pin is located in the connecting hole and is pressed on the anti-disassembly cap along the axial direction of the connecting bolt, and the anti-disassembly pin is interference-fitted with the wall of the connecting hole.

[0009] Preferably, it also includes a pin remover; the end of the tamper pin is provided with a blind hole, one end of the pin remover is used to be screwed to the wall of the blind hole, and the pin remover is used to remove the tamper pin from the connecting hole.

[0010] Preferably, the pressure block is provided with a countersunk hole for inserting the tamper cap.

[0011] Preferably, the tamper-evident cap is provided with a limiting groove communicating with the connecting hole in the circumferential direction, and the tamper-evident pin extends into the limiting groove through the connecting hole to restrict the movement of the tamper-evident cap.

[0012] Preferably, a wall surface that fits against the outer circumferential surface of the hub is provided between the blade and the connecting handle.

[0013] Preferably, the connecting handle is provided with a limiting groove, and the pressure block is provided with a limiting protrusion for embedding into the limiting groove, the limiting protrusion being used to restrict the blade from moving radially along the wheel.

[0014] Preferably, the pressure block has an overlapping surface and a pressing surface at its beginning and end, respectively, and the overlapping surface is used to press onto the pressing surface of the adjacent pressure block.

[0015] Preferably, the connector passes through the overlapping and pressing surfaces that are pressed together.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. When the blade angle needs to be adjusted, loosen the connector to disconnect the pressure block, connecting handle, hub, and disc. Adjust the blade to the appropriate angle by rotating it, and then tighten the connector to fix the blade's current angle. This achieves the purpose of adjusting the angle of a single blade, is simple to operate, and does not affect the position of other blades.

[0018] 2. The design incorporates anti-disassembly components and countersunk anti-disassembly caps. This serves two purposes: firstly, it prevents unauthorized personnel from disassembling the axial flow impeller; secondly, the connection components and anti-disassembly pins provide double protection, enhancing the stability of the blade installation. Additionally, corresponding pin removal components are provided to facilitate the installation and removal of the anti-disassembly pins that interferocity with the pressure block, further preventing unauthorized disassembly.

[0019] 3. The limiting protrusion can restrict the sliding and rotation of the blade in the radial direction of the disc, and keep the blade angle unchanged.

[0020] 4. The locking nuts are pressed onto the adjacent pressure blocks simultaneously, and the adjacent pressure blocks overlap each other, which improves the reliability of the pressure block fixing. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the wheel structure in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the wheel hub in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the blade structure in an embodiment of this application.

[0025] Figure 5 This is a front view of the pressure block in the embodiment of this application.

[0026] Figure 6 This is a top view of the pressure block in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of the connector structure in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the anti-tamper cap in an embodiment of this application.

[0029] Figure 9 This is a schematic diagram of the anti-tamper pin structure in an embodiment of this application.

[0030] Figure 10 This is a schematic diagram of the structure of the pin removal component in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Wheel disc; 2. Hub; 3. Blade; 31. Wall surface; 32. Connecting handle; 321. Limiting groove; 4. Pressure block; 41. Limiting protrusion; 42. Overlapping surface; 43. Pressing surface; 44. Countersunk hole; 441. Countersunk groove one; 442. Countersunk groove two; 45. Connecting hole; 5. Connecting piece; 51. Connecting bolt; 52. Locking nut; 6. Anti-tamper cap; 61. Limiting groove; 7. Anti-tamper pin; 71. Blind hole; 8. Pin removal rod; 9. Handle; 91. Anti-slip knurling. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0033] Reference Figure 1 The present application discloses a split axial flow impeller including a disc 1, a hub 2, blades 3, a pressure block 4, a connecting piece 5, and an anti-disassembly piece.

[0034] Reference Figure 2 , Figure 3 and Figure 4 The hub 2 is coaxially mounted on the disc 1. The blade 3 is provided with a wall surface 31 and a connecting handle 32 in sequence. The connecting handle 32 passes through the hub 2 radially upward along the disc 1 and is rotatably connected to the hub 2. The wall surface 31 is in contact with the outer circumferential surface of the hub 2. The connecting handle 32 is provided with a limiting groove 321 in the circumferential direction.

[0035] Reference Figure 1 , Figure 5 and Figure 6The pressure block 4 is pressed onto the connecting handle 32 along the axial direction of the wheel 1. The pressure block 4 is provided with a limiting protrusion 41, which is embedded in the limiting groove 321 to restrict the movement of the blade 3. The number of blades 3 and pressure blocks 4 is the same, and multiple blades 3 are evenly distributed along the circumference of the wheel 1. The pressure block 4 is provided with an overlapping surface 42 and a pressing surface 43 at its beginning and end, respectively. Between adjacent pressure blocks 4, the overlapping surface 42 of one pressure block 4 is pressed onto the pressing surface 43 of the other pressure block 4.

[0036] Reference Figure 1 and Figure 7 The connecting component 5 includes a connecting bolt 51 and a locking nut 52. The head of the connecting bolt 51 abuts against the wheel disc 1, and the shank of the connecting bolt 51 passes sequentially through the wheel disc 1, the wheel hub 2, and the overlapping surface 42 and pressing surface 43 pressed together, connecting the pressure block 4, the connecting handle 32, the wheel hub 2, and the wheel disc 1 in series. The locking nut 52 is screwed onto the connecting bolt 51 and simultaneously pressed onto the adjacent pressure block 4.

[0037] Reference Figure 1 , Figure 8 and Figure 9 The anti-tampering components include an anti-tampering cap 6 and an anti-tampering pin 7. The pressure block 4 has a countersunk groove 441 at one end and a countersunk groove 442 at the other. The countersunk grooves 441 and 442 of adjacent pressure blocks 4 form a countersunk hole 44. The anti-tampering cap 6 is located within the countersunk hole 44 and is axially fitted onto the locking nut 52 along the connecting bolt 51. The locking nut 52 has a circumferential limiting surface to prevent the anti-tampering cap 6 from rotating circumferentially. In this embodiment, the locking nut 52 is a hexagonal nut, and the limiting surface refers to the six faces of the hexagonal nut.

[0038] The pressure block 4 is provided with a connecting hole 45. The tamper cap 6 is provided with a limiting groove 61 that communicates with the connecting hole 45 in the circumferential direction. The tamper pin 7 is located in the connecting hole 45 and extends into the limiting groove 61 through the connecting hole 45 to restrict the movement of the tamper cap 6. The tamper pin 7 is interference-fitted with the hole wall of the connecting hole 45.

[0039] Reference Figure 1 , Figure 9 and Figure 10 A split-type axial flow impeller also includes a pin removal component.

[0040] The pin-removing component includes a pin-removing lever 8 and a handle 9. The end of the tamper-evident pin 7 has a blind hole 71. One end of the pin-removing lever 8 is screwed into the wall of the blind hole 71, and the pin-removing lever 8 is used to remove the tamper-evident pin 7 from the connecting hole 45. The other end of the pin-removing lever 8 is connected to the handle 9, which has anti-slip knurling 91. The wall of the blind hole 71 and the outer circumference of the pin-removing lever 8 both use left-hand threads.

[0041] The implementation principle of a split-type axial flow impeller in this application embodiment is as follows:

[0042] When it is necessary to adjust the angle of blade 3, use the pin remover 8 to remove the tamper pin 7, then remove the tamper cap 6, and loosen the locking nut 52. Adjust the blade 3 to the appropriate angle by rotating it, and then tighten the locking nut 52 to fix the angle of blade 3 at this time. This achieves the purpose of adjusting the angle of a single blade 3, which is simple to operate and does not affect the position of other blades 3.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A split axial impeller, characterized by: The application relates to a wheel hub assembly, which comprises a wheel disc (1), a wheel hub (2), a blade (3), a pressing block (4) and a connecting piece (5); the wheel hub (2) is coaxially arranged on the wheel disc (1); a connecting handle (32) is fixedly arranged on the blade (3) and penetrates the wheel hub (2) along the radial direction of the wheel disc (1) and is rotationally connected with the wheel hub (2); the pressing block (4) is axially arranged on the connecting handle (32); the connecting piece (5) is used for connecting the pressing block (4), the connecting handle (32), the wheel hub (2) and the wheel disc (1) in series in a detachable mode; and the pressing block (4) and the blade (3) are both provided with a plurality of wall surfaces (31) which are in close contact with the outer circumferential surface of the wheel hub (2). The wall surface (31) is arranged between the blade (3) and the connecting handle (32). The connecting piece (5) comprises a connecting bolt (51) and a locking nut (52); the connecting bolt (51) penetrates the pressing block (4), the wheel hub (2) and the wheel disc (1) in sequence and connects the pressing block (4), the connecting handle (32), the wheel hub (2) and the wheel disc (1) in series; and the locking nut (52) is screwed on the connecting bolt (51) and is arranged on the adjacent pressing block (4). The application further comprises an anti-disassembly piece, which comprises an anti-disassembly cap (6) and an anti-disassembly pin (7); the anti-disassembly cap (6) is arranged on the locking nut (52) along the axial direction of the connecting bolt (51); the locking nut (52) is circumferentially provided with a limiting surface which prevents the anti-disassembly cap (6) from rotating in the circumferential direction; the pressing block (4) is provided with a connecting hole (45); the anti-disassembly pin (7) is arranged in the connecting hole (45) and is arranged on the anti-disassembly cap (6) along the axial direction of the connecting bolt (51); and the anti-disassembly pin (7) is in interference fit with the hole wall of the connecting hole (45).

2. The split axial impeller of claim 1, wherein: The application further comprises a pin taking-out piece; the end of the anti-disassembly pin (7) is provided with a blind hole (71); one end of the pin taking-out piece is used for being screwed with the hole wall of the blind hole (71); and the pin taking-out piece is used for taking out the anti-disassembly pin (7) from the connecting hole (45).

3. The split axial impeller of claim 1, wherein: The pressing block (4) is provided with a countersunk hole (44) which is used for embedding the anti-disassembly cap (6).

4. A split axial impeller according to claim 3, wherein: The anti-disassembly cap (6) is circumferentially provided with a limiting recess (61) which is in communication with the connecting hole (45); and the anti-disassembly pin (7) extends into the limiting recess (61) through the connecting hole (45) to limit the movement of the anti-disassembly cap (6).

5. A split axial impeller according to claim 1 or 4, characterized in that: The connecting handle (32) is provided with a limiting groove (321); the pressing block (4) is provided with a limiting protrusion (41) which is used for embedding the limiting groove (321); and the limiting protrusion (41) is used for limiting the radial movement of the blade (3) along the wheel disc (1).

6. The split axial impeller of claim 1, wherein: The pressing block (4) is respectively provided with a lap joint surface (42) and a pressing joint surface (43) at the head and tail thereof; and the lap joint surface (42) is used for being arranged on the pressing joint surface (43) of the adjacent pressing block (4).

7. A split axial impeller according to claim 6, characterized in that: The connecting piece (5) penetrates the lap joint surface (42) and the pressing joint surface (43) which are arranged together.

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