An oil-free propeller-adjustable operating mechanism

Abstract

The utility model discloses an oil-free paddle adjustment operating mechanism, including a hub body, a connecting shaft is arranged at the upper end of the hub body, a transmission cavity is arranged inside the hub body, a first rotating rod is arranged at the middle position inside the transmission cavity, four second rotating rods are arranged inside the transmission cavity and are distributed in an annular manner and at equal intervals, a worm is welded to the upper end of each second rotating rod, and the worm is rotatably connected to the transmission cavity, and a storage cavity is arranged outside the hub body, the storage cavity is distributed in an annular manner and is provided with four groups, and each group of storage cavities has two storage cavities, an extrusion cavity is arranged at one end of each storage cavity, and a lifting plate is slidably arranged inside the extrusion cavity. When the oil-free paddle adjustment operating mechanism is used, when the external water flow impacts the paddle blade, the angle of the paddle blade will not be changed, so as to ensure the stability after adjustment and avoid affecting normal use.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to an oil-free paddle-adjusting operating mechanism. Background Art

[0002] The oil-free pitch-adjustable operating mechanism is mainly used in water turbines, especially shaft-extended tubular turbines. Water turbines are devices that convert water energy into mechanical energy and are widely used in fields such as hydropower generation. In traditional propeller-type shaft-extended tubular turbines, blade operation often relies on complex oil receivers to transfer pressurized oil, but this method has problems such as oil leakage and oil blowby. Since the oil-free pitch-adjustable operating mechanism does not need to use an oil receiver to transfer pressurized oil, it fundamentally solves the common problems of oil leakage and oil blowby in traditional water turbines, which not only improves the reliability of the equipment, but also reduces maintenance costs.

[0003] The existing Chinese patent with announcement number CN207393372U discloses an oil-free paddle adjustment operating mechanism for the runner of a shaft-extended cross-flow unit, including a relay rod, one end of which is connected to a high-pressure blade electro-hydraulic actuator at the small shaft end of the turbine, and the other end is connected to an operating frame in a hub body, and the operating frame is linked to a rotating arm through a connecting plate, the rotating arm is sleeved on the blade shaft, and torque is transmitted through a pin, and a retaining ring is clamped in a clamping groove of the blade shaft to fix the rotating arm, and the reciprocating motion of the relay rod drives the operating frame, the connecting plate, and the rotating arm to operate the blade to rotate; three guide keys are arranged between the operating frame and the guide groove of the hub body to prevent the operating frame from rotating.

[0004] Although the above scheme can operate and adjust the blades, the device lacks locking of the blades after adjustment, resulting in insufficient stability after adjustment. It may cause the blades to shift in position due to water flow, vibration or other external factors during operation, thereby affecting the overall operating efficiency and stability of the turbine. Therefore, it does not meet existing needs. In this regard, we propose an oil-free propeller adjustment operating mechanism. Utility Model Content

[0005] The utility model aims to provide an oil-free pitching operation mechanism to solve the problem that the stability of the propeller blades after adjustment by the oil-free pitching operation mechanism proposed in the background technology is insufficient, thus affecting the stability of the turbine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-free paddle-adjustable operating mechanism, comprising a hub body, wherein a connecting shaft is provided at the upper end of the hub body;

[0007] It also includes a transmission cavity, which is opened inside the wheel hub body, a first rotating rod is arranged at the middle position inside the transmission cavity, four second rotating rods are arranged inside the transmission cavity and are distributed in an annular manner and at equal intervals, a worm is welded on the upper end of each of the second rotating rods, and the worm is rotatably connected to the transmission cavity;

[0008] It also includes a storage cavity, which is opened on the outside of the wheel hub body. The storage cavities are arranged in four groups in an annular shape and are evenly spaced, and each group of storage cavities has two storage cavities. An extrusion cavity is opened at one end of the storage cavity, and a lifting plate is slidably arranged inside the extrusion cavity. A connecting rod is welded at the middle position of one end surface of the lifting plate, and one end of the connecting rod passes through and extends to the interior of the storage cavity, and the connecting rod is slidably matched with the storage cavity.

[0009] Preferably, a motor is disposed at the upper end of the transmission cavity, and the output end of the motor is connected to the first rotating rod through a coupling.

[0010] Preferably, a first transmission gear is disposed on the lower side of the outer wall of the first rotating rod, a second transmission gear is disposed on the lower side of the outer wall of the second rotating rod, and the second transmission gears are meshedly connected with the first transmission gears.

[0011] Preferably, four rotating shafts equidistantly distributed in a ring shape are rotatably arranged on the upper side of the transmission cavity, worm wheels are arranged on the outer walls of the rotating shafts, and worm gear transmission is adopted between the worm wheels and the worm.

[0012] Preferably, the outer wall of the hub body is provided with four annular blades equidistantly distributed, one end of the blades extends into the interior of the transmission cavity, and one end of the blades located inside the transmission cavity is fixedly connected to the rotating shaft.

[0013] Preferably, guide rods are welded on both sides of the extrusion chamber, and one end of the guide rods passes through the lifting plate.

[0014] Preferably, a return spring is sleeved on the upper side of the outer portion of the guide rod, one end of the return spring is connected to the extrusion cavity, and the other end of the return spring is connected to the lifting plate.

[0015] Preferably, an arc-shaped rubber block is adhesively fixed to one end of the connecting rod located inside the storage cavity, and the arc-shaped rubber block is in contact with the blade.

[0016] Preferably, five bearings are provided on the lower side of the transmission cavity, and the first rotating rod and the second rotating rod are rotatably connected to the transmission cavity through the bearings.

[0017] Preferably, batteries are provided on both sides of the motor.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model opens a transmission cavity inside the wheel hub body, starts the motor, and the motor rotates the first transmission gear. Under the meshing transmission of the first transmission gear and the second transmission gear, the second rotating rod can drive the worm to rotate synchronously. Under the worm gear transmission between the worm and the worm wheel, the rotating shaft can drive the blade to rotate. Since the worm gear transmission has self-locking properties, when the external water flow impacts the blade, the angle of the blade will not be changed, thereby ensuring the stability after adjustment and avoiding affecting normal use.

[0020] 2. The utility model has four groups of storage chambers equidistantly distributed in an annular shape on the outside of the hub body, and each group of storage chambers has two storage chambers. An arc-shaped rubber block is arranged inside the storage chamber, and a return spring is arranged in the extrusion chamber. The elastic action of the return spring will cause the lifting plate to move toward the storage chamber, so that the arc-shaped rubber block can be squeezed and fitted to the blades through the connecting rod, which can improve the overall sealing and enable the blades to obtain better support and stability when rotating.

[0021] 3. The utility model has five bearings arranged on the lower side of the wheel hub body. When the first rotating rod and the second rotating rod rotate, the bearings ensure the stability of rotation and increase the firmness of the connection with the wheel hub body. It is safer and more stable during operation and greatly reduces the maintenance and replacement costs caused by equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a front view schematic diagram of the internal structure of the utility model;

[0024] Figure 3 It is a top view schematic diagram of the internal structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the transmission connection between the worm and the worm wheel of the utility model;

[0026] Figure 5 For the utility model Figure 2 A partial enlarged view of the middle A area;

[0027] Figure 6 For the utility model Figure 2 A partial enlarged view of area B in the middle.

[0028] In the figure: 1. hub body; 2. paddle; 3. connecting shaft; 4. transmission chamber; 5. motor; 6. battery; 7. first rotating rod; 8. first transmission gear; 9. bearing; 10. rotating shaft; 11. worm gear; 12. worm; 13. second rotating rod; 14. second transmission gear; 15. storage chamber; 16. extrusion chamber; 17. arc-shaped rubber block; 18. guide rod; 19. reset spring; 20. lifting plate; 21. connecting rod. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-6 , the utility model provides a technical solution: an oil-free paddle-adjustable operating mechanism, comprising a hub body 1, a connecting shaft 3 is arranged at the upper end of the hub body 1;

[0031] It also includes a transmission cavity 4, which is opened inside the hub body 1, and a first rotating rod 7 is arranged at the middle position inside the transmission cavity 4. Four second rotating rods 13 are arranged inside the transmission cavity 4 and are distributed in an annular shape and at equal intervals. The upper ends of the second rotating rods 13 are welded with worms 12, and the worms 12 are rotatably connected to the transmission cavity 4.

[0032] The wheel hub body 1 also includes a storage cavity 15, which is opened on the outside of the wheel hub body 1. The storage cavities 15 are arranged in four groups in an annular shape and are evenly spaced. Each group of storage cavities 15 has two storage cavities. An extrusion cavity 16 is arranged at one end of the storage cavity 15. A lifting plate 20 is slidably arranged inside the extrusion cavity 16. A connecting rod 21 is welded at the middle position of one end surface of the lifting plate 20. One end of the connecting rod 21 passes through and extends to the inside of the storage cavity 15, and the connecting rod 21 is slidably matched with the storage cavity 15.

[0033] During use, after starting the motor 5, the motor drives the first rotating rod 7 to rotate through the coupling, and the first rotating rod 7 drives the first transmission gear 8 to rotate. Since the first transmission gear 8 is meshed with the second transmission gear 14, the second rotating rod 13 also rotates synchronously. The rotation of the second rotating rod 13 further drives the worm 12. Through the worm gear transmission, the worm wheel 11 drives the rotating shaft 10 to rotate, and finally the angle of the blade 2 is adjusted. Since the worm gear transmission is self-locking, the impact of water flow on the blade 2 will not change its angle, thereby improving the stability of the system.

[0034] See also Figure 2A motor 5 is disposed at the upper end of the transmission cavity 4, and the output end of the motor 5 is connected to the first rotating rod 7 through a coupling. The motor 5 can directly and efficiently drive the first rotating rod 7 to rotate, thereby reducing energy loss and improving transmission efficiency.

[0035] See also Figure 2 and Figure 3 A first transmission gear 8 is disposed on the lower side of the outer wall of the first rotating rod 7, and a second transmission gear 14 is disposed on the lower side of the outer wall of the second rotating rod 13, and the second transmission gear 14 is meshed and connected with the first transmission gear 8. Through gear transmission, the synchronous rotation of the first rotating rod 7 and the second rotating rod 13 can be ensured, and the gear transmission has the characteristics of stable transmission ratio and high transmission efficiency;

[0036] See also Figure 3 , Figure 4 and Figure 5 Four rotating shafts 10 are rotatably arranged on the upper side of the transmission chamber 4 and are equidistantly distributed in a ring shape. A worm gear 11 is arranged on the outer wall of the rotating shaft 10, and a worm gear transmission is arranged between the worm gear 11 and the worm 12. The worm gear transmission has a self-locking property. When the external water flow impacts the blade 2, the angle of the blade 2 will not be changed, thereby improving the stability and safety of the system.

[0037] See also Figure 1 , Figure 2 and Figure 3 The outer wall of the hub body 1 is provided with four annular blades 2 which are evenly distributed. One end of the blades 2 extends into the interior of the transmission cavity 4, and one end of the blades 2 located inside the transmission cavity 4 is fixedly connected to the rotating shaft 10. The rotation of the rotating shaft 10 can directly drive the rotation of the blades 2, thereby achieving directness and high efficiency of power transmission.

[0038] See also Figure 6 Guide rods 18 are welded on both sides of the extrusion cavity 16, and one end of the guide rods 18 passes through the lifting plate 20. The guide rods 18 provide a stable guide for the movement of the lifting plate 20, ensuring the stability and accuracy of the lifting plate 20 during the movement;

[0039] See also Figure 6 , a return spring 19 is sleeved on the upper side of the outer portion of the guide rod 18, one end of the return spring 19 is connected to the extrusion chamber 16, and the other end of the return spring 19 is connected to the lifting plate 20. The return spring 19 can automatically push the lifting plate 20 back to the initial position when there is no external force, thereby ensuring the automatic reset function of the system;

[0040] See also Figure 6The end of the connecting rod 21 located inside the storage cavity 15 is adhered and fixed with an arc-shaped rubber block 17, and the arc-shaped rubber block 17 is in close contact with the blade 2. The arc-shaped rubber block 17 can closely fit the blade 2, providing good sealing, and also plays a role in shock absorption and noise reduction;

[0041] See also Figure 2 Five bearings 9 are arranged on the lower side of the transmission chamber 4. The first rotating rod 7 and the second rotating rod 13 are both rotatably connected with the transmission chamber 4 through the bearings 9. The bearings 9 can ensure the stability and reliability of the first rotating rod 7 and the second rotating rod 13 during the rotation process, reduce friction and wear, and extend the service life of the equipment;

[0042] See also Figure 2 , batteries 6 are arranged on both sides of the motor 5, and the batteries 6 provide a lasting power source for the motor 5, ensuring that the system can work normally without an external power supply, thereby improving the independence and reliability of the system.

[0043] Working principle: When in use, the motor 5 is started, and the motor 5 drives the first rotating rod 7 to rotate through the coupling, and the first rotating rod 7 drives the first transmission gear 8 to rotate. Since the first transmission gear 8 is meshed with the second transmission gear 14, it drives the second transmission gear 14 to make the second rotating rod 13 rotate synchronously. The setting of the bearing 9 ensures the stability of the rotation of the first transmission gear 8 and the second transmission gear 14. The second rotating rod 13 drives the worm 12 to rotate. Since the worm gear transmission between the worm 12 and the worm wheel 11 is carried out, the worm wheel 11 is driven to rotate the rotating shaft 10, and the rotating shaft 10 drives the blade 2 to rotate, thereby realizing Now, the angle of the blade 2 is adjusted. Since the worm gear transmission has a self-locking property, the impact of the water flow on the blade 2 will not cause the angle of the blade 2 to change, thereby improving stability. The return spring 19 inside the extrusion chamber 16 will squeeze and push the lifting plate 20, and the guide rod 18 can guide the lifting plate 20 to prevent its moving direction from deviating. The guide rod 18 will move in the direction of the blade 2, and the arc-shaped rubber block 17 can be moved synchronously through the connection of the connecting rod 21, so that the arc-shaped rubber block 17 can be squeezed and fitted to the blade 2, thereby increasing the overall sealing, so that the blade 2 can get better support and stability when rotating.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An oil-free pitching operation mechanism, comprising a hub body (1), wherein a connecting shaft (3) is provided at the upper end of the hub body (1), characterized in that: It also comprises a transmission cavity (4) which is opened inside the wheel hub body (1), a first rotating rod (7) is arranged at a middle position inside the transmission cavity (4), four second rotating rods (13) which are equidistantly distributed in an annular shape are arranged inside the transmission cavity (4), a worm (12) is welded to the upper end of each of the second rotating rods (13), and the worm (12) is rotatably connected to the transmission cavity (4); It also includes a storage cavity (15) which is opened on the outside of the hub body (1), the storage cavities (15) are arranged in a circular shape and are evenly spaced, and each group of storage cavities (15) has two storage cavities, one end of each storage cavity (15) is provided with an extrusion cavity (16), a lifting plate (20) is slidably arranged inside the extrusion cavity (16), a connecting rod (21) is welded at the middle position of one end surface of the lifting plate (20), one end of the connecting rod (21) passes through and extends to the inside of the storage cavity (15), and the connecting rod (21) is slidably matched with the storage cavity (15); The outer wall of the hub body (1) is provided with four annular blades (2) equidistantly distributed, one end of each blade (2) extends into the interior of the transmission cavity (4), and the end of each blade (2) located inside the transmission cavity (4) is fixedly connected to the rotating shaft (10), guide rods (18) are welded on both sides of the interior of the extrusion cavity (16), one end of each guide rod (18) passes through the lifting plate (20), and a return spring (19) is sleeved on the upper side of the exterior of each guide rod (18), one end of each return spring (19) is connected to the extrusion cavity (16), and the other end of each return spring (19) is connected to the lifting plate (20), and an arc-shaped rubber block (17) is adhesively fixed to one end of each connecting rod (21) located inside the storage cavity (15), and the arc-shaped rubber block (17) is in contact with the blade (2).

2. The oil-free pitch-adjustable operating mechanism according to claim 1, characterized in that: A motor (5) is provided at the upper end of the transmission chamber (4), and the output end of the motor (5) is connected to the first rotating rod (7) through a coupling.

3. The oil-free pitch-adjustable operating mechanism according to claim 1, characterized in that: A first transmission gear (8) is arranged on the lower side of the outer wall of the first rotating rod (7), and a second transmission gear (14) is arranged on the lower side of the outer wall of the second rotating rod (13), and the second transmission gear (14) is meshedly connected with the first transmission gear (8).

4. The oil-free pitch-adjustable operating mechanism according to claim 1, characterized in that: Four rotating shafts (10) equidistantly distributed in a ring shape are rotatably arranged on the upper side of the transmission chamber (4), and worm wheels (11) are arranged on the outer walls of the rotating shafts (10), and worm gear transmission is implemented between the worm wheels (11) and the worm (12).

5. The oil-free pitch-adjustable operating mechanism according to claim 1, characterized in that: Five bearings (9) are arranged on the lower side of the transmission chamber (4), and the first rotating rod (7) and the second rotating rod (13) are both rotatably connected to the bearings (9) and the transmission chamber (4).

6. The oil-free pitch-adjustable operating mechanism according to claim 2, characterized in that: Storage batteries (6) are arranged on both sides of the motor (5).

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