Blade deflection angle adjusting device

Abstract

A blade deflection angle adjusting device comprises a shaft sleeve (2) fixedly connected to a rotating shaft (1) of a motor, the right end of the shaft sleeve extends in the radial direction to form a disc body (3), the disc body is connected with a barrel (4), a plurality of mandrels (15) are inserted in the wall of the barrel in the radial direction, the outer ends of the mandrels are connected with blades (14), the inner ends of the mandrels are connected with battens (5), and the right end of the barrel is closed. A rod body (6) in contact with the batten (5) is inserted in the closed portion of the barrel, the bent end of the batten (5) is in contact with the end face of a baffle disc (13), a spring is arranged between the baffle disc and the disc body (3), the right end of the rod body (6) is in contact with the end face of a pushing disc (9), and the pushing disc is spirally connected to a threaded rod (17) fixedly connected to the closed portion of the barrel. The fan blade has the beneficial effects that the deflection angle of the fan blade can be conveniently adjusted, and the deflection angle can be steplessly adjusted.

Description

Technical Field

[0001] This utility model relates to a device for adjusting the deflection angle of a fan blade. Background Technology

[0002] In practical engineering, the flow rate of fans needs to be frequently adjusted according to external demands. Changing the deflection angle of the fan blades can regulate the flow rate. In existing technology, the structure for adjusting the deflection angle of fan blades includes a connecting sleeve. One end of the connecting sleeve is a sleeve, and the other end of the sleeve extends radially to a disc. The sleeve is connected to a rotating shaft, and the disc is connected to the blade. A shim with a certain angle is inserted between the disc and the blade. When the blade angle needs to be adjusted, the blade is removed and a shim with a different angle is replaced to achieve the adjustment of the blade angle.

[0003] The deflection angle of this type of blade is inconvenient to adjust, and it cannot be infinitely adjusted. Utility Model Content

[0004] To facilitate the adjustment of the deflection angle of the fan blades and to achieve stepless adjustment of the deflection angle, this utility model proposes a device for adjusting the deflection angle of the fan blades.

[0005] The technical solution of this utility model is a blade deflection angle adjustment device, which includes a bushing 2 fixedly connected to the rotating shaft 1 of a motor, a disc 3 extending radially from the right end of the bushing, and the disc 3 fixedly connected to the left end of a cylinder 4. The device is characterized in that multiple spindles 15 are symmetrically inserted radially into the wall of the cylinder, the spindles can only rotate within the wall of the cylinder, the outer end of the spindle is connected to a blade 14, and the inner end of the spindle is connected to a strip 5, the strip 5 being perpendicular to the axis of the spindle. The right end is closed, and a rod 6 is inserted into the closed part of the cylinder. The left end of the rod 6 contacts the strip 5, and the bent end of the strip 5 contacts the end face of the baffle 13. The baffle 13 is sleeved on the shaft 11, and the shaft 11 is fixedly connected to the disc 3. A spring 12 is sleeved on the shaft 11, and the spring is located between the baffle 13 and the disc 3. The right end of the rod 6 contacts the end face of the push disc 9, and the push disc 9 is screwed onto the threaded rod 17. The threaded rod is fixedly connected to the center of the closed part of the cylinder.

[0006] When adjusting the blade deflection angle, rotate the push disk, which drives the rod to move. The rod presses against the strip, causing the strip to rotate. The strip then drives the spindle and blade to rotate.

[0007] The beneficial effect of this utility model is that it can conveniently adjust the deflection angle of the fan blades, and the deflection angle can be adjusted steplessly. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the present invention.

[0009] Figure 2for Figure 1 A sectional view along line AA.

[0010] The attached diagram is labeled as follows: 1-shaft, 2-sleeve, 3-disc body, 4-cylinder body, 5-strip plate, 6-rod body, 7-pin, 8-anti-friction disc, 9-push disc, 10-nut, 11-shaft body, 12-spring, 13-stop disc, 14-blade, 15-spindle, 16-small diameter shaft, 17-threaded rod. Detailed Implementation

[0011] A blade deflection angle adjustment device includes a bushing 2 fixedly connected to a motor shaft 1. A disc 3 extends radially from the right end of the bushing and is fixedly connected to the left end of a cylinder 4. Multiple spindles 15 are symmetrically inserted radially into the wall of the cylinder. The spindles can only rotate within the wall of the cylinder and cannot move within it. A blade 14 is connected to the outer end of the spindle (the portion of the spindle protruding from the outer circle of the cylinder), and a strip 5 is connected to the inner end of the spindle (the portion of the spindle protruding from the inner circle of the cylinder). The strip 5 is perpendicular to the axis of the spindle. The right end of the cylinder is closed, and a rod 6 is inserted into the closed part of the cylinder. The left end of the rod 6 contacts the strip 5, and the bent end of the strip 5 contacts the end face of the baffle 13. The baffle 13 is sleeved on the shaft 11, and the shaft 11 is fixedly connected to the center of the disc 3. The shaft 11 can also extend from the disc 3. A spring 12 is sleeved on the shaft 11, and the spring is located between the baffle 13 and the disc 3. The right end of the rod 6 contacts the end face of the push disc 9, and the push disc 9 is screwed onto the threaded rod 17, which is fixedly connected to the closed part of the cylinder.

[0012] The principle of adjusting the blade deflection angle is that rotating the push plate moves the rod, the rod pushes the strip to rotate, the strip drives the spindle to rotate, and the blade rotates with the spindle, thereby achieving the adjustment of the deflection angle; the function of the spring is to keep the baffle and the strip in close contact, and to fix the rotation angle of the blade.

[0013] To prevent the mandrel from moving within the cylinder wall, a retaining ring can be installed on the mandrel, which is in close contact with both the outer and inner walls of the cylinder. Alternatively, an annular groove can be provided in the middle of the mandrel 15, with the pin 7 inserted into the wall at the right end of the cylinder 4, and the end of the pin 7 located in the annular groove.

[0014] The inner end of the mandrel 15 extends to a small-diameter shaft 16 with a reduced diameter. The strip 5 is connected to the small-diameter shaft 16, which makes it easy to increase the diameter of the mandrel and improve its strength.

[0015] During the operation of the fan, in order to prevent the blade angle from changing due to the loosening of the drive plate, a nut 10 is screwed on the threaded rod 17, and the nut 10 is tightly attached to the right side of the drive plate 9.

[0016] To prevent the pusher disc from rubbing against the right end of the rod 6 when it rotates, a washer 8 is fitted on the threaded rod, with the washer located between the rod and the pusher disc.

[0017] To facilitate the rotation of the drive plate, a pattern is rolled onto the outer surface of the drive plate.

Claims

1. A device for regulating the deflection angle of a blade, comprising a sleeve (2) fixedly connected to the rotating shaft (1) of an electric motor, a disc (3) extending radially from the right end of the sleeve, and a cylinder (4) fixedly connected to the left end of the disc, characterized in that, Multiple spindles (15) are symmetrically inserted radially on the wall of the cylinder. The spindles can only rotate within the wall of the cylinder. The outer end of the spindle is connected to a blade (14), and the inner end of the spindle is connected to a strip (5). The strip is perpendicular to the axis of the spindle. The right end of the cylinder is closed. A rod (6) is inserted into the closed part of the cylinder. The left end of the rod contacts the strip (5). The bent end of the strip (5) contacts the end face of the baffle (13). The baffle is sleeved on the shaft (11). The shaft (11) is fixedly connected to the disc (3). A spring (12) is sleeved on the shaft (11). The spring is located between the baffle (13) and the disc (3). The right end of the rod (6) contacts the end face of the push disc (9). The push disc (9) is screwed onto the threaded rod (17). The threaded rod is fixedly connected to the center of the closed part of the cylinder.

2. The vane deflection angle adjusting device according to claim 1, wherein the The mandrel (15) has an annular groove in the middle, and the pin (7) is inserted into the wall at the right end of the cylinder (4), with the end of the pin (7) located in the annular groove.

3. The blade pitch angle adjusting device according to claim 1 or 2, characterized in that, The inner end of the mandrel (15) extends a small diameter shaft (16) with a reduced diameter, and the strip 5 is connected to the small diameter shaft (16).

4. The blade pitch angle adjusting device according to claim 1 or 2, characterized by, A nut (10) is also screwed onto the threaded rod (17), which is close to the right side of the push plate (9).

5. The blade pitch angle adjusting device according to claim 1 or 2, characterized by, A washer (8) is fitted on the threaded rod, and the washer is located between the rod body and the push plate.

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