CN104454306A - Rotary guide rod type blade telescopic mechanism and tidal power generator adopting same - Google Patents

Abstract

The invention provides a rotating guide rod type blade expansion mechanism and a tidal current power generation device using the rotation guide rod type blade expansion mechanism. The rotation guide rod type blade expansion mechanism includes a base and two H-shaped brackets installed on both sides of the base , The left end shaft seat and the right end shaft seat installed on the two H-shaped brackets respectively, the left end central shaft installed in the left end shaft seat and the right end central shaft installed in the right end shaft seat, and the two ends are respectively set on the left end central shaft and the right end The hub on the central shaft is characterized in that: the two ends of the central shaft at the left end and the central shaft at the right end are fixedly connected to flanges respectively, and an eccentric shaft is also included, and the two ends of the eccentric shaft are respectively fixedly connected to the two flanges , the eccentric shaft is also sleeved with blades, and the blades pass through the blade grooves provided on the hub. The invention is simple and practical, has high reliability, is convenient for maintenance, is suitable for two-way ocean currents, has high energy utilization rate, and is suitable for high-power power generation.

Description

Rotating guide rod type blade telescopic mechanism and tidal current power generation device using the rotating guide rod type blade telescopic mechanism

technical field

The invention relates to a blade telescopic mechanism and a tidal current power generation device using the blade telescopic mechanism, in particular to a rotating guide rod type blade telescopic mechanism and a tidal current power generation device using the rotating guide rod type blade telescopic mechanism.

Background technique

Ocean energy power generation technology is a major form of marine renewable energy utilization, in which the main energy conversion device for tidal current energy is a water turbine. The forms of tidal current power generation devices mainly include horizontal axis turbines, vertical axis turbines and horizontal axis turbines. The feature of the horizontal axis turbine that has been studied in recent years is that it can extend the horizontal axis, has low requirements for water depth, realizes high-power power generation in shallow waters, and can adapt to the two-way water flow back and forth without the need for yaw devices. These characteristics are aimed at utilizing my country's long The coastline and rich river water resources are very favorable. Therefore, the horizontal axis turbine is also known as one of the mainstream models of turbine research at home and abroad in recent years. The direction of the main rotation axis of the horizontal axis turbine is perpendicular to the direction of water flow and water depth, and the blades have various shapes. The early horizontal axis turbines used fixed blades to realize the energy conversion of bidirectional water flow. Later, in order to reduce the influence of reverse torque, the turbine blades Developed into a telescopic form, during the rotation of the impeller, the blades of the water turbine periodically expand and contract in the hub to improve energy utilization. Cam-type, hydraulic cylinder-type and spring-type blade telescopic mechanisms have been mentioned in existing studies. Among them, the cam-type telescopic mechanism can make the blades periodically expand and contract along a fixed track. At present, Aalborg University in Denmark has conducted a sea test on a megawatt-level turbine, but the disadvantage of the cam mechanism is that the high pair of wear is relatively serious, and the cam The wear and tear seriously affects the motion accuracy and control quality, thus causing failure. The Chinese patent (notification number CN100400859C) proposes a hydraulic cylinder-type blade telescopic mechanism in the telescopic propeller sea current energy generation device. Three double-rod hydraulic cylinders are installed in the rotor at the same time, and the electromagnetic reversing valve is used to realize the reversing, which requires water. The lower power supply device and reliable sealing device are difficult to realize in practical engineering applications, while the principle and structure of the proposed spring structure are very simple and easy to implement, but it is not suitable for long-term underwater work. A Chinese patent (publication number CN102720623A) mentions a rack-and-pinion structure applied to the expansion and contraction of vertical-axis water turbine blades in a vertical-axis telescopic blade water turbine. This design makes the hub bulky and requires four independent motor drives, which leads to low energy utilization.

Contents of the invention

The purpose of the present invention is to provide a rotating guide rod type blade telescopic mechanism and its application in order to automatically adjust the expansion and contraction of the blade at each position during the rotation of the blade around the main shaft, realize the expansion and contraction performance of the blade and have high efficiency. The utility model relates to a tidal current power generating device of the rotating guide rod type blade telescopic mechanism.

The purpose of the present invention is achieved in this way: the rotating guide rod type blade telescoping mechanism comprises a base, two H-shaped brackets installed on both sides of the base, a left end shaft seat and a right end shaft seat respectively installed on the two H-shaped brackets, The left end central shaft in the left end shaft seat, the right end central shaft installed in the right end shaft seat, and the hubs whose two ends are respectively sleeved on the left end central shaft and the right end central shaft are characterized in that: the two ends of the left end central shaft and the right end central shaft The two ends of the eccentric shaft are fixedly connected to the flanges respectively, and also include an eccentric shaft. groove.

The tidal current power generation device using the rotating guide rod type blade expansion mechanism is as follows: the upper end of the H-shaped bracket is fixedly connected to the installation plate, a gear speed increaser is arranged on the mounting plate, and the input end of the gear speed increaser is sleeved with a driven belt. The pulley and the output end are connected with the input shaft end of the generator, and the driving pulley is set on the central shaft of the left end or the central shaft of the right end, and a transmission belt is arranged between the driving pulley and the driven pulley.

The present invention also includes such structural features:

1. There are 2-4 blades, corresponding to 2-4 blade grooves set on the hub.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention designs a new type of rotating guide rod-type blade expansion and contraction mechanism, which can automatically adjust the expansion and contraction of the blade at each position during the rotation of the blade around the main shaft. , to achieve the expansion and contraction performance of the blades and also improve the energy efficiency of the horizontal axis tidal current power generation device. The invention is simple and practical, has high reliability and is convenient for maintenance; it is suitable for two-way ocean currents and does not need to design complicated water-facing mechanisms or pitch-changing mechanisms; the invention has high energy utilization rate and is suitable for high-power power generation. The invention sinks into the bottom of the sea during operation, and the blades contract periodically during rotation, which reduces the influence of reverse torque and improves energy utilization efficiency.

Description of drawings

Fig. 1 is a side view of the present invention;

Fig. 2 is a schematic diagram of the mechanism movement of the blade telescopic mechanism;

Fig. 3 is the front sectional view of the impeller of the present invention;

Figure 4 is a side view of the impeller of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

1, 3 and 4, including the base 4, two H-shaped brackets 3 installed on both sides of the base 4, the left end shaft seat 12 and the right end shaft seat 9 respectively installed on the two H-shaped brackets 3, the installation The left end central shaft 11 in the left end shaft seat 12 and the right end central shaft 8 installed in the right end shaft seat 9 and the two ends are respectively sleeved on the left end central shaft 11 and the wheel hub 6 on the right end central shaft 8, at the left end central shaft 12 and the right end The two ends of the central shaft 8 are fixedly connected to the flanges 7 respectively, and also include the eccentric shaft 5, the two ends of the eccentric shaft 5 are respectively fixedly connected with the two flanges 7, and the eccentric shaft 5 is also equipped with blades 13, And the blade 13 passes through the blade groove provided on the hub 6 .

The tidal current power generation device using the above-mentioned rotating guide rod type blade telescopic mechanism, the upper end of the H-shaped bracket 3 is fixedly connected to the installation plate, and the gear speed increaser 2 is arranged on the mounting plate, and the input end of the gear speed increaser 2 is set Driven pulley is arranged, and output end is connected with the input shaft end of generator 1, and drive pulley 10 is set on left end center shaft 11 or right end center shaft 8, and transmission belt 14 is set between drive pulley 10 and driven pulley. There are 2-4 blades 13 in the present invention, corresponding to 2-4 blade grooves provided on the hub 6, and the blades 13 are flat blades.

The tidal current power generation device of the present invention is installed in shallow sea areas, river courses, etc., and the direction of placement is that the direction of the central axis 11 at the left end and the central axis 8 at the right end are perpendicular to the direction of water flow and the direction of water depth, forming a horizontal axis turbine for power generation. The eccentric shaft 5 is divided into several shaft sections, both ends are fixed with the flange 7, and the root of the blade 13 is made into a hollow cylinder and sleeved in the middle section of the eccentric shaft 5, and the blades 13 are installed alternately without interfering with each other At the same time, there is also a bearing installed between the blade 13 and the eccentric shaft 5 to realize relative rotation; the eccentric shaft 5 is connected to the left central shaft 11 and the right central shaft 8 respectively through the flange 7, and the installation position on the flange 7 can be adjusted. Realize the adjustment of the eccentric distance; the hub 6 evenly opens blade grooves corresponding to the number of blades 13, the rotational output of the hub 6 is transmitted to the upper side through the conveyor belt 14, and the speed-up of the gear speed-up mechanism 2 realizes the movement with the main shaft of the generator 1 Transfer to realize the power generation process. The generator 1 is connected with the fixed mounting plate on the upper end of the bracket 3, and the part of the generator 1 needs to be well sealed so as not to damage the generator due to water leakage of the device.

During the working process of the rotating guide rod type telescopic paddle transverse axis tidal current power generation device, the blade 13 rotates periodically around the eccentric shaft 5. At the same time, the rotation of the hub 6 is driven by the insertion of the blade 13 into the long groove of the hub 6, and the contact between the blade 13 and the hub The inconsistency of the center of rotation of 6 forms the periodic contraction of the blade in the groove of the hub 6. Because the blades 13 protruding from the two ends of the hub 6 have a large difference in length, the impeller will rotate continuously under the force of the water flow on one side. Take the embodiment with four blades 13 as an example to illustrate: Figure 2 is a schematic diagram of the mechanism movement of the blade telescopic mechanism, the hub 6 is a cylindrical member with four long slots evenly opened, and the blades 13 are fixedly sleeved on the eccentric shaft 5 One end of the blade 13 is embedded in the blade groove provided on the hub 6, and the blade 13 and the hub 6 rotate around their respective rotation centers. When the blade 13 rotates, it can push the hub 6 to rotate, and the hub 6 is unilaterally stressed. The effect of reverse torque on hub rotation is reduced. The rotation of the hub 6 is the source of the motion of the input shaft of the generator 1 . The movement is transmitted through the conveyor belt 14 and the gear speed-up mechanism 2, and the mechanical energy transmission is transformed into electrical energy output. When the blade 13 is positioned directly above the hub 6, the length of the blade 13 protruding from the hub 6 is the longest; 13 drives the hub 6 to rotate periodically, and the dotted line in FIG. 2 shows the trajectory of the top of the blade 13 .

The tidal current power generation device provided by the present invention adopts a gravity support method, and the installation of the entire device is carried out on the shore. Before the device is launched, it is necessary to conduct geomorphological exploration on the seabed, select a relatively flat sea area on the seabed for installation, and remove seaweed before installation. Debris affecting the operation of the turbine. Because the entire device operates underwater, the power generation device must be well sealed to ensure the continuous and stable operation of the turbine during operation.

The specific embodiments above are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

Claims (3)

1. A rotating guide rod type blade telescopic mechanism, including a base, two H-shaped brackets installed on both sides of the base, the left end shaft seat and the right end shaft seat installed on the two H-shaped brackets respectively, and the left end shaft seat installed The central shaft at the left end, the central shaft at the right end installed in the shaft seat at the right end, and the hubs with both ends respectively sleeved on the central shaft at the left end and the central shaft at the right end are characterized in that: the two ends of the central shaft at the left end and the central shaft at the right end are fixedly connected respectively The flange plate also includes an eccentric shaft, the two ends of the eccentric shaft are respectively fixedly connected with the two flange plates, the eccentric shaft is also fitted with blades, and the blades pass through the blade grooves provided on the hub. 2. A rotating guide rod type blade telescopic mechanism according to claim 1, characterized in that: there are 2-4 blades, corresponding to 2-4 blade grooves provided on the hub. 3. The tidal current power generation device using the rotating guide rod type blade telescopic mechanism according to claim 1, characterized in that: the upper end of the H-shaped bracket is fixedly connected to the mounting plate, and a gear speed increaser is arranged on the mounting plate, and the gear speed increaser The input end of the gearbox is covered with a driven pulley, the output end is connected with the input shaft end of the generator, a driving pulley is set on the central shaft at the left end or the central shaft at the right end, and a transmission belt is set between the driving pulley and the driven pulley.