Highly-integrated small-sized fan braking and stopping device and small-sized fan comprising same

Abstract

The utility model relates to a highly-integrated small fan brake stopping device which comprises a main shaft brake mechanism with a straight gear, a variable pitch brake linkage mechanism and a power output mechanism. The power output mechanism and the main shaft brake mechanism and the variable pitch brake linkage mechanism are contained in a fan cabin together. The variable-pitch braking linkage mechanism comprises a variable-pitch mandrel, a single-face straight tooth sleeve shaft meshed with a straight gear, and a rotating isolation assembly which enables the variable-pitch mandrel to rotate along with the main shaft relative to the single-face straight tooth sleeve shaft and to axially move along with the single-face straight tooth sleeve shaft relative to the main shaft so as to achieve variable pitch. The power output mechanism comprises an industrial electric rod, the industrial electric rod is fixedly connected with a single-face straight tooth sleeve shaft and can axially move in a fan cabin when powered on, and therefore braking and stopping of the small fan are achieved through the variable-pitch braking linkage mechanism and the main shaft braking mechanism. According to the utility model, a steel wire rope is canceled and is highly integrated in the fan cabin, so that the installation and debugging can be realized before the product leaves the factory, the installation and debugging steps are simplified, the economical efficiency of the product is improved, and the technical threshold is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to a highly integrated small wind turbine braking and shutdown device and a small wind turbine including the same. Background Technique

[0002] For the normal shutdown and cut-out of strong winds protection of small wind turbines below 5kW, most use the generator electromagnetic torque braking, tail folding or main shaft disc brakes, drum brakes or electromagnetic brake braking schemes. The specific situations are as follows:

[0003] The method of generator electromagnetic torque braking is relatively common. The main reason is that it utilizes the current generator of the product without additional cost increase. However, the disadvantage is that it cannot achieve the absolute stop of the impeller, cannot be applied in areas with good wind resources, and there is a high probability of impeller overspeed in the event of a typhoon, further leading to accidents such as motor burnout or controller burnout;

[0004] For the tail folding method, there are those with deflected angle gravity self-adaptive tail folding and active tail folding that can be referred to in the market. Among them, for the deflected angle gravity self-adaptive tail folding, the impeller cannot be completely aligned with the wind at 90° when cutting out the wind speed. The reason why this method is relatively common is that the manufacturing cost is not high, but the disadvantages are also very prominent. After the rated wind speed and before the cut-out wind speed, the impeller will also be deflected to face the wind, and the blades are in a very unstable airflow state, causing additional load fluctuations, accelerating the loosening or fatigue of the whole machine's components, and also cannot achieve the absolute stop of the wind wheel. It is not suitable for areas with good wind resources, and there is a high probability of impeller overspeed in the event of a typhoon, further leading to accidents such as motor burnout, controller burnout or loosening or damage of impeller tail rudder components;

[0005] The active tail folding can achieve complete alignment of the impeller with the wind at 90° when cutting out the wind speed, and the rotation speed of the impeller can be limited during strong winds. However, the disadvantage is that after the rated wind speed and before the cut-out wind speed, the impeller will also be deflected to face the wind, and the blades are in a very unstable airflow state, causing additional load fluctuations, accelerating the loosening or fatigue of the whole machine's components. The impeller and the tail rudder need to be strengthened accordingly. It is said that the folding part of the tail rudder is a point where accidents frequently occur;

[0006] The main shaft disc brake, drum brake or electromagnetic brake braking scheme can achieve the absolute stop of the impeller, achieve the braking and shutdown of the impeller when cutting out the wind speed, and there will be no problem of impeller overspeed during storms or typhoons. However, the disadvantages are: because the impeller diameters of wind turbines are relatively large and the moments of inertia are relatively large, it is a great test for the brake to stop the wind wheel when cutting out the wind speed, and the blade connection and the entire rotating transmission chain will be subjected to the impact load of braking.

[0007] The applicant of this application has previously optimized the braking impact for small and medium-sized wind turbines (with a power of about 20 kW or more). The company adopted a strategy of pitch control and braking linkage (for example, in CN2021211973950, a small hydraulic pump station is installed inside the nacelle). First, the pitch is adjusted to reduce the blade's ability to absorb power until it finally becomes negative, that is, there is an effect of blade air braking. Then, the main shaft mechanical brake is engaged, so the braking impact will be much smaller. However, for smaller wind turbines (with a power of less than 15 kW), the internal space of the nacelle is limited. Currently, a power pole (i.e., an industrial electric pole) installed at the bottom of the tower is used to provide power. Through a steel wire rope, the brake arm with a brake arm gear in the pitch control and braking linkage structure is pulled. One side of this brake arm stops the main shaft through the main shaft braking mechanism, and the other side makes the blades pitch simultaneously through a pitch actuator pull rod pitch mechanism to reduce and finally stop the rotation of the impeller, ultimately achieving the braking of the wind turbine. Such a structural layout is considered convenient for maintaining the execution structure of the pitch control and braking linkage, but such a structural layout also brings other problems:

[0008] 1) The wind turbine needs to passively yaw to face the wind. The steel wire rope needs to pass through the tower from inside the nacelle. Although the steel wire rope connection through a figure-eight turnbuckle can solve the problem of the steel wire rope winding during the yaw of the wind turbine, the phenomenon of the steel wire rope twisting still exists after braking;

[0009] 2) The power pole is installed at the bottom of the tower. In some projects, the tower is relatively tall, the length of the steel wire rope is very long, the steel wire rope has its own weight and certain ductility, and factors such as temperature changes may cause unstable braking in-place signals and incomplete braking release;

[0010] 3) When the wind turbine is operating normally for power generation, there is noise from the figure-eight turnbuckle of the steel wire rope hitting the tower in this structural solution;

[0011] 4) Since the height of the tower of the wind turbine is also a configuration, the towers required for different projects vary greatly. Therefore, in the prior art, factors such as the tower height need to be considered. Moreover, in particularly cold regions and regions with large seasonal temperature differences, the amount of thermal expansion and contraction of the steel wire rope also needs to be considered. These considerations increase the complexity of product design;

[0012] 5) The installation of these devices needs to be carried out on-site. Especially if the installation guidance personnel cannot go to the site, since most customers do not understand the installation, remote guidance for commissioning and installation is required. This remote guidance for commissioning and installation is very time-consuming and laborious, greatly increasing the labor cost of personnel and resulting in a very poor customer experience. Summary of the Invention

[0013] To overcome the above problems, it would be advantageous for the present utility model to provide a highly integrated small wind turbine braking and shutdown device that eliminates the direct integration of wire ropes inside the nacelle of the wind turbine, and a small wind turbine incorporating the same.

[0014] To this end, according to one aspect of the present utility model, there is provided a highly integrated small wind turbine braking and shutdown device, comprising:

[0015] A main shaft braking mechanism, which includes a braking camshaft, and a spur gear, a braking linkage gear pull rod, a braking adjustable pull rod, a braking force arm, a brake shoe, and a brake drum that are sequentially drivingly connected. Among them, the braking force arm is arranged to rotate around the braking camshaft to drive the brake shoe to expand, so as to contact the brake drum to achieve braking of the main shaft of the wind turbine generator.

[0016] A pitch braking linkage mechanism, including a pitch core shaft, a single-sided straight-tooth sleeve shaft meshing with the spur gear, and a rotary isolation assembly installed between the pitch core shaft and the single-sided straight-tooth sleeve shaft. The rotary isolation assembly is configured such that the pitch core shaft can rotate relative to the single-sided straight-tooth sleeve shaft along with the main shaft of the wind turbine generator, and can axially move relative to the main shaft of the wind turbine generator along with the single-sided straight-tooth sleeve shaft to achieve pitching of the wind turbine impeller.

[0017] A power output mechanism, which is housed inside the nacelle of the wind turbine together with the pitch braking linkage mechanism and the main shaft braking mechanism, and includes an industrial electric rod. The industrial electric rod is fixedly connected to the single-sided straight-tooth sleeve shaft and is arranged to be able to axially move inside the nacelle of the wind turbine when powered on, so as to achieve braking and shutdown of the small wind turbine through the pitch braking linkage mechanism and the main shaft braking mechanism.

[0018] In the present utility model, by directly placing the highly integrated small wind turbine braking and shutdown device inside the nacelle of the small wind turbine, eliminating the wire ropes, and directly connecting the industrial electric rod to the front-end pitch braking linkage mechanism, etc., the installation and commissioning of related functions can be solved before the product leaves the factory. When the small wind turbine is installed and constructed on site, the main part of the wind turbine only needs to connect the cables and be bolted to the bottom of the tower. It no longer includes complex technical operations and debugging operations, greatly simplifies the installation and commissioning steps, improves the economy of the product, and significantly reduces the technical threshold for customers to use. The present utility model eliminates various defects and uncertainties brought about by the steel rope power output structure installed at the bottom of the tower in the prior art. The quality control of the product leaving the factory can achieve the consistency of the braking and shutdown actions of the product in the small wind turbine, and is basically not restricted by factors such as the tower configuration, environmental temperature difference, and the professional technical level of on-site construction workers, etc.

[0019] Furthermore, the main shaft braking mechanism is installed at the rear end of the fan engine and includes a braking fixing plate. Among them, a braking camshaft and a braking linkage fixing seat are installed on the braking fixing plate. A spur gear and a braking linkage gear pull rod are rotatably installed on the braking linkage fixing seat. A single-sided spur gear sleeve shaft is axially movably installed on the braking linkage fixing seat. The power output mechanism further includes a power main body bracket, and the front end of the power main body bracket is fixedly installed on the braking linkage fixing seat. Among them, an industrial electric rod is located inside the power main body bracket and is axially movably installed on the rear end plate of the power main body bracket at its rear end and fixedly connected to the single-sided spur gear sleeve shaft at its front end.

[0020] Through the above structural arrangement, the structure of the whole mechanism is very compact, making the most of the nacelle space of existing products and without interference with each other.

[0021] Furthermore, a sliding sleeve is fixedly connected to the rear end of the industrial electric rod. A sliding sleeve guide seat is fixedly installed on the rear end plate of the power main body bracket. The sliding sleeve is arranged to be axially slidably installed inside the sliding sleeve guide seat. Still further, a radially penetrating long slot hole is provided on the sliding sleeve, and the sliding sleeve is slidably connected to the sliding sleeve guide seat through a first pin shaft penetrating through the long slot hole and installed on the sliding sleeve guide seat.

[0022] Through the above ingenious structural treatment, industrial electric rods with conventional strokes on the market can meet the current installation and use requirements, saving the cost of custom development of industrial electric rods, maximizing the procurement cost savings, and at the same time facilitating the maintenance and replacement of industrial electric rods in the later stage.

[0023] Even further, the industrial electric rod is fixedly connected to the sliding sleeve via a second pin shaft at its rear end. A shock-absorbing support for giving shock absorption to the industrial electric rod is installed below the industrial electric rod on the bottom plate of the power main body bracket.

[0024] Still further, the industrial electric rod is connected to the single-sided spur gear sleeve shaft through a self-made cross connector and a sleeve transition flange. Among them, the self-made cross connector is provided with two axial holes axially spaced apart and arranged in a cross shape. Through a first pin shaft passing through one of the axial holes, the industrial electric rod is fixedly connected to the self-made cross connector at its rear end. Through a connecting screw passing through the other axial hole, the self-made cross connector is connected to the rear end part of the sleeve transition flange. The front end part of the sleeve transition flange is fixed to the single-sided spur gear sleeve shaft through bolts.

[0025] Through the above structural arrangement (including the installation of the shock-absorbing support), the dynamic load from the impeller side can be effectively resolved, making the external load of the industrial electric rod as axial as possible.

[0026] Still further, at the gear end of the spur gear meshing with the braking linkage gear pull rod, the rod end of the braking linkage gear pull rod is arranged to be able to move up and down. The braking adjustable pull rod is respectively connected to the rod end of the braking linkage gear pull rod and the braking force arm at both of its ends through spherical plain bearings.

[0027] Still further again, the rotating isolation assembly sequentially includes a front-end radial bearing, a thrust bearing, a washer, a rear-end radial bearing, a tapered sleeve, a ball head nut and a lock nut from front to back. Among them, the tapered hole surface of the tapered sleeve is adapted to the ball head surface of the ball head nut. And among them, the pitch-changing core shaft, the rotating plate of the thrust bearing, the washer, the inner rings of the front-end radial bearing and the rear-end radial bearing, the tapered sleeve, the ball head nut and the lock nut rotate together when the pitch-changing core shaft rotates. Even further, the tapered sleeve, the ball head nut and the lock nut are sequentially sleeved on the rear end portion of the pitch-changing core shaft from front to back. And the narrow-diameter front end of the tapered sleeve passes through the inner ring of the rear-end radial bearing, the washer and the rotating plate of the thrust bearing for installation.

[0028] Through the above structural settings, on the one hand, the dynamic loads from the impeller side can be effectively resolved, so that the external load on the industrial power pole is preferably along its axial direction. On the other hand, through the optimized settings of these structures such as the washer, the rear-end radial bearing, the tapered sleeve and the ball head nut, the durability of the modified mechanism can be ensured, so that the product is improved in terms of durability and safety, and the failure rate is reduced. In particular, the adaptation of the tapered hole surface of the tapered sleeve to the ball head surface of the ball head nut plays a centering role, which is suitable for performing pitch-changing actions in complex dynamic processes and improves the reliability of the product.

[0029] Another further, a precious metal conductive slip ring is also installed on the bottom plate of the nacelle. The three-phase cable of the wind turbine generator and the power supply and position signal cables of the industrial power pole are transmitted from the inside of the wind turbine nacelle to the inside of the wind turbine tower through this precious metal conductive slip ring.

[0030] Through the above structural settings, it can ensure the smooth progress of the passive yaw movement of the small wind turbine. Moreover, the precious metal conductive slip ring can increase the number of rings according to the demand of the number of cables, and can be customized according to customer requirements or special use environments. The application of the precious metal conductive slip ring enables the small wind turbine to meet more application scenarios.

[0031] According to another aspect of the present invention, there is provided a small wind turbine, which includes the above-mentioned highly integrated small wind turbine braking and stopping device.

[0032] By referring to the embodiments described below, these aspects and other aspects of the present invention will be more clearly explained. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The structure, further objectives and advantages of the present utility model will be better understood from the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements:

[0034] Figure 1 is a schematic cross-sectional view of a highly integrated small wind turbine braking and shutdown device according to a specific embodiment of the present utility model, taken along the central axis direction of the wind turbine generator main shaft;

[0035] Figure 2 is Figure 1 a schematic external view of the highly integrated small wind turbine braking and shutdown device shown, with the nacelle removed for clarity;

[0036] Figure 3 is Figure 1 an enlarged schematic view of part A of the highly integrated small wind turbine braking and shutdown device shown;

[0037] Figure 4 is Figure 3 an enlarged schematic view of a part of the structure shown. Specific Embodiment

[0038] The specific embodiments of the present utility model will be described below in conjunction with the accompanying drawings. However, it should be understood that the embodiments disclosed herein are merely typical examples of the present utility model, which can be embodied in various forms. Therefore, the specific details disclosed herein are not considered restrictive, but merely as the basis for the claims and as a representative basis for teaching those skilled in the art to apply the present utility model in any appropriate manner in practice.

[0039] In this document, the directional representations used to explain the structure and / or movement of the various parts of the disclosed embodiments, such as "front", "rear", "inner", "outer", etc., are not absolute but relative. When the various parts of the disclosed embodiments are in the positions shown in the figures, these representations are appropriate, and if the positions or reference systems of the disclosed embodiments change, these representations will also change according to the changes in the positions or reference systems of the disclosed embodiments.

[0040] As Figures 1 to 4 shown, a highly integrated small wind turbine braking and shutdown device according to a specific embodiment of the present utility model includes a main shaft braking mechanism 1, a pitch braking linkage mechanism 3 and a power output mechanism 5.

[0041] As Figure 1 and Figure 2As shown, in this embodiment, the main shaft braking mechanism 1 is installed at the rear end of the fan engine 2, and includes a braking fixed plate 10, a spur gear 11, a braking linkage gear pull rod 12, a braking adjustable pull rod 14, a braking force arm 15, a braking camshaft 16, a brake shoe 17, and a brake hub 18. Among them, the braking camshaft 16 and the braking linkage fixed seat 13 are installed on the braking fixed plate 10; the spur gear 11 and the braking linkage gear pull rod 12 are rotatably installed on the braking linkage fixed seat 13, and the spur gear 11, the braking linkage gear pull rod 12, the braking adjustable pull rod 14, the braking force arm 15, the brake shoe 17, and the brake hub 18 are sequentially drivingly connected. Specifically, in this embodiment, as Figure 1 and Figure 2 shown, and referring to Figure 3 , the spur gear 11 meshes with the gear end 121 of the braking linkage gear pull rod 12; the rod end 123 of the braking linkage gear pull rod 12 is configured to be able to move up and down, and is movably connected to one end of the braking adjustable pull rod 14 via a spherical plain bearing 140. The other end of the braking adjustable pull rod 14 is movably connected to the braking force arm 15 via a spherical plain bearing 140. The braking force arm 15 is configured to be able to rotate around the axis of the braking camshaft 16 under the drive of the braking adjustable pull rod 14 to drive the brake shoe 17 to expand, so that the brake shoe 17 contacts the brake hub 18 to realize the braking of the main shaft 20 of the fan generator.

[0042] As Figure 1 , Figure 2 and Figure 3 shown, in this embodiment, the pitch braking linkage mechanism 3 includes a single-sided spur gear sleeve shaft 31 that meshes with the spur gear 11, a pitch core shaft 33, and a rotary isolation assembly 30 installed between the pitch core shaft 33 and the single-sided spur gear sleeve shaft 31. The single-sided spur gear sleeve shaft 31 is axially movably installed on the braking linkage fixed seat 13; the rotary isolation assembly 30 is configured such that the pitch core shaft 33 can rotate relative to the single-sided spur gear sleeve shaft 31 along with the main shaft 20 of the fan generator, and can axially move relative to the main shaft 20 of the fan generator along with the single-sided spur gear sleeve shaft 31 to realize the pitch of the fan impeller (not shown in the figure). It should be noted that the pitch core shaft 33 passes through the main shaft 20 of the fan generator from one side of the fan impeller (i.e., Figure 1 the right side), and the pitch core shaft 33 rotates together with the fan impeller and the main shaft 20 of the fan generator; the pitch core shaft 33 also passes through the single-sided spur gear sleeve shaft 31. The single-sided spur gear sleeve shaft 31 does not rotate relative to the braking linkage fixed seat 13 and the nacelle 4, but only can axially move. The single-sided spur gear sleeve shaft 31 is equivalent to a rack, and its linear motion in the axial direction is converted into the rotation of the spur gear 11 through a gear-rack pair, and the rotation of the spur gear 11 further drives the braking linkage gear pull rod 12 to rotate through gear meshing.

[0043] As Figure 3 and Figure 4As clearly shown and with reference to Figure 1 and Figure 2 , the rotation isolation assembly 30 successively includes a front radial bearing 32, a thrust bearing 34, a washer 35, a rear radial bearing 36, a tapered sleeve 37, a ball head nut 38, and a lock nut 39 from front to back. Among them, the tapered hole surface 370 of the tapered sleeve 37 is adapted to the ball head surface 380 of the ball head nut 38. And, as Figure 4 shown, the pitch spindle 33, the rotating plate 340 of the thrust bearing 34, the washer 35, the inner bearing ring of the front radial bearing 32, and the inner bearing ring 360 of the rear radial bearing 36, the tapered sleeve 37, the ball head nut 38, and the lock nut 39 are equivalent to forming a rigid body with the pitch spindle 33 and rotate together with the pitch spindle 33 when the pitch spindle 33 rotates. Specifically, in this embodiment, as Figure 3 and Figure 4 shown, the tapered sleeve 37, the ball head nut 38, and the lock nut 39 are successively sleeved on the rear end portion of the pitch spindle 33 from front to back. And, the narrow-diameter front end 371 of the tapered sleeve 37 passes through the inner bearing ring 360 of the rear radial bearing 36, the washer 35, and the rotating plate 340 of the thrust bearing 34 for installation.

[0044] As Figure 1 and Figure 2 shown, the power output mechanism 5, the pitch braking linkage mechanism 3, and the main shaft braking mechanism 1 are accommodated together in the fan nacelle 4. Among them, the power output mechanism 5 includes a power main body bracket 50 and an industrial electric rod 51. The industrial electric rod 51 is fixedly connected to the single-sided straight-tooth sleeve shaft 31 and is arranged to be axially movable in the fan nacelle 4 when powered on, so as to realize the braking and shutdown of the small fan via the pitch braking linkage mechanism 3 and the main shaft braking mechanism 1; the power main body bracket 50 is fixedly installed on the braking linkage fixed seat 13 at its front end. Specifically, as Figure 1 shown, in this embodiment, the industrial electric rod 51 is located inside the power main body bracket 50, and its rear end 510 is axially movably installed on the rear end plate 501 of the power main body bracket 50, and its front end 512 is fixedly connected to the single-sided straight-tooth sleeve shaft 31.

[0045] As Figure 1 shown and with reference to Figure 2 , in this embodiment, the industrial electric rod 51 is fixedly connected with a sliding sleeve 53 via a second pin shaft 54 at its rear end 510, and a sliding sleeve guide seat 55 is fixedly installed on the rear end plate 501 of the power main body bracket 50. The sliding sleeve 53 is arranged to be axially slidably installed inside the sliding sleeve guide seat 55. Specifically, as Figure 2 shown and with reference to Figure 1, in this embodiment, a long slot hole 530 penetrating radially is provided on the sliding sleeve 53, and the sliding sleeve 53 is slidably connected to the sliding sleeve guide seat 55 through a first pin shaft 52 installed through the long slot hole 530 on the sliding sleeve guide seat 55. Of course, in other embodiments, the long slot hole can also be provided on the sliding sleeve guide seat 55. In addition, as Figure 1 shown, a shock-absorbing support 57 for buffering the industrial electric rod 51 is installed on the bottom plate 502 of the power main body support 50, and the shock-absorbing support 57 is located below the industrial electric rod 51.

[0046] As Figure 3 shown and referring to Figure 1 , in this embodiment, the industrial electric rod 51 is connected to the single-sided straight gear sleeve shaft 31 via a self-made cross connector 6 and a sleeve shaft transition flange 7. Among them, the self-made cross connector 6 is provided with two axial holes (not shown in the figure) spaced axially and arranged in a cross shape. The industrial electric rod 51 is fixedly connected to the self-made cross connector 6 at its rear end via a pin shaft one 61 passing through one of the axial holes. The self-made cross connector is connected to the rear end of the sleeve shaft transition flange 7 via a connecting screw 62 passing through the other axial hole. The sleeve shaft transition flange 7 is fixed to the single-sided straight gear sleeve shaft 31 at its front end by bolts. The pin shaft one 61 and the connecting screw 62 are arranged at 90° in space, forming the functional effect of a cross coupling.

[0047] As Figure 1 and Figure 2 shown, a precious metal conductive slip ring 8 is also installed on the bottom plate 40 of the fan nacelle 4. The three-phase cable of the fan generator 2 (not shown in the figure) and the power supply and position signal cables of the industrial power rod 51 (not shown in the figure) are transmitted from the inside of the fan nacelle 4 to the inside of the fan tower (not shown in the figure) through the precious metal conductive slip ring 8.

[0048] Through the above structural settings in this article, the power output mechanism 5, the pitch braking linkage mechanism 3, and the main shaft braking mechanism 1 are all integrated in the fan nacelle 4 together. Most of the work can be completed during the factory pre-delivery debugging. After the fan main unit is shipped, except for the blades and the tail rudder that need to be installed on site, then the cables at the lower end of the precious metal conductive slip ring 8 are connected to the cables inside the fan tower according to the requirements of the wiring diagram. Finally, the fan base (not shown in the figure) is bolted to the flange at the top of the fan tower, which greatly simplifies the on-site installation process. The whole machine installation and debugging can be completed with an installation team and an electrical engineer on the construction site.

[0049] It should be noted that the structural form of the power main body support 50 is not limited to the welded structure, and a casting structure can also be used, which can save the costs of material cutting and welding and is suitable for mass production.

[0050] According to another aspect of the present utility model, there is also provided a small fan, which includes the above-mentioned highly integrated small fan braking and shutdown device.

[0051] The technical content and technical features of the present utility model have been disclosed above. However, it can be understood that under the creative concept of the present utility model, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features separately disclosed or claimed here, and other combinations that obviously include these features. These deformations and / or combinations all fall within the technical field involved in the present utility model and within the protection scope of the claims of the present utility model.

Claims

1. A highly integrated small wind turbine brake stop device, characterized in that include: The main shaft brake mechanism comprises a brake camshaft, and a spur gear, a brake linkage gear pull rod, a brake adjustable pull rod, a brake force arm, a brake shoe and a brake hub which are sequentially driven and connected, wherein the brake force arm is arranged to rotate around the brake camshaft to drive the brake shoe to expand and contact the brake hub to realize the main shaft brake of the wind turbine generator; The pitch brake linkage mechanism comprises a pitch core shaft, a single-sided spur gear sleeve shaft meshing with the spur gear, and a rotation isolation assembly installed between the pitch core shaft and the single-sided spur gear sleeve shaft, wherein the rotation isolation assembly is configured to enable the pitch core shaft to rotate relative to the single-sided spur gear sleeve shaft along with the main shaft of the wind turbine generator, and to move axially relative to the main shaft of the wind turbine generator along with the single-sided spur gear sleeve shaft to achieve pitch change of the wind turbine impeller; The power output mechanism, together with the pitch brake linkage mechanism and the main shaft brake mechanism, is housed in the wind turbine cabin and includes an industrial electric rod, which is fixedly connected to the single-sided spur gear sleeve and is configured to be able to move axially in the wind turbine cabin when powered on, thereby achieving the braking and stopping of the small wind turbine via the pitch brake linkage mechanism and the main shaft brake mechanism.

2. The highly integrated small wind turbine brake stopping device according to claim 1 is characterized in that: The main shaft brake mechanism is installed at the rear end of the fan engine and includes a brake fixing plate, wherein the brake camshaft and the brake linkage fixing seat are installed on the brake fixing plate, the spur gear and the brake linkage gear pull rod are rotatably installed on the brake linkage fixing seat, and the single-sided spur gear sleeve can be axially movably installed on the brake linkage fixing seat; the power output mechanism also includes a power main body bracket, which is fixedly installed on the brake linkage fixing seat at its front end, wherein the industrial electric rod is located in the power main body bracket and is axially movably installed on the rear end plate of the power main body bracket at its rear end, and is fixedly connected to the single-sided spur gear sleeve at its front end.

3. The highly integrated small wind turbine brake stopping device according to claim 2 is characterized in that: The industrial electric rod is fixedly connected with a sliding sleeve at its rear end, and a sliding sleeve guide seat is fixedly installed on the rear end plate of the power main body bracket. The sliding sleeve is configured to be axially slidably installed in the sliding sleeve guide seat.

4. The highly integrated small wind turbine brake stopping device as claimed in claim 3 is characterized in that: The sliding sleeve is provided with a radially penetrating long slot hole, and is slidably connected to the sliding sleeve guide seat via a first pin shaft penetrating the long slot hole and installed on the sliding sleeve guide seat.

5. The highly integrated small wind turbine brake stopping device according to claim 4 is characterized in that: The industrial electric rod is fixedly connected to the sliding sleeve via a second pin shaft at its rear end; the power main body bracket is equipped with a shock-absorbing support for providing shock absorption to the industrial electric rod below the industrial electric rod on its bottom plate.

6. The highly integrated small wind turbine brake stopping device according to claim 5, characterized in that: The industrial electric rod is connected to the single-sided spur gear sleeve via a self-made cross connector and a sleeve transition flange, wherein the self-made cross connector is provided with two axial holes axially spaced apart and arranged in a cross, and the industrial electric rod is fixedly connected to the self-made cross connector at its rear end via a pin passing through one of the axial holes, and the self-made cross connector is connected to the rear end of the sleeve transition flange via a connecting screw passing through the other axial hole, and the sleeve transition flange is fixed to the single-sided spur gear sleeve at its front end by bolts.

7. The highly integrated small wind turbine brake stop device according to any one of claims 1 to 6, characterized in that: The rotation isolation assembly includes, from front to back, a front radial bearing, a thrust bearing, a washer, a rear radial bearing, a tapered sleeve, a ball nut and a lock nut, wherein the tapered hole surface of the tapered sleeve is adapted to the ball head surface of the ball nut, and wherein the pitch core shaft, the rotating plate of the thrust bearing, the washer, the bearing inner rings of the front radial bearing and the rear radial bearing, the tapered sleeve, the ball nut and the lock nut rotate together when the pitch core shaft rotates.

8. The highly integrated small wind turbine brake and stop device according to claim 7, characterized in that: The tapered sleeve, the ball nut and the lock nut are sequentially sleeved on the rear end of the pitch core shaft from front to back, and the narrow-diameter front end of the tapered sleeve is installed through the bearing inner ring of the rear end radial bearing, the washer and the rotating plate of the thrust bearing.

9. The highly integrated small wind turbine brake and stop device according to any one of claims 1 to 6, characterized in that: A precious metal conductive slip ring is also installed on the bottom plate of the nacelle, and the three-phase cable of the wind turbine generator and the power supply and position signal cables of the industrial electric pole are transmitted from the inside of the wind turbine nacelle to the inside of the wind turbine tower through the precious metal conductive slip ring.

10. A small wind turbine, comprising the highly integrated small wind turbine braking and stopping device according to any one of claims 1 to 9.

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