A variable pitch cabinet for wind power

Abstract

The utility model relates to the technical field of variable pitch cabinet, and disclose a kind of for wind power generation's variable pitch cabinet, the variable pitch cabinet for wind power generation includes cabinet, connecting mechanism realizes the quick disassembly of cover plate and cabinet, replace traditional bolt fixed mode by mechanical linkage, sealing joint provides the channel of inlaying for external cable while maintaining cabinet sealing grade, fixed part firmly installs entire device on ground or support structure, its bearing design disperses the vibration load when equipment operates, reinforcing plate enhances the mechanical strength of fixed part and cabinet connecting part, prevent the metal fatigue caused by long-term vibration, through-hole is as standardized installation interface and adapts various fixed bolts. The variable pitch cabinet for wind power generation, linkage mechanism of connecting rod and clamping block is driven by handle to realize quick locking, and rotating operation can complete the tight fixing of cover plate and cabinet, and the cooperation of spring and baffle forms bidirectional pressure to ensure connection firm.

Description

Technical Field

[0001] This utility model relates to the field of pitch control cabinet technology, specifically a pitch control cabinet for wind power generation. Background Technology

[0002] The pitch control unit is the core control unit of a wind turbine generator set, mainly used to adjust the pitch angle of the turbine blades. This device is usually installed inside the nacelle or at the hub. It optimizes wind energy capture efficiency and ensures safe operation of the unit by adjusting the blade angle in real time. The pitch control unit contains precision electrical components such as controllers, drivers, and power modules. These components require reliable environmental protection to cope with harsh conditions such as vibration, temperature difference, and salt spray. Modern pitch systems have extremely high requirements for response speed and reliability, which makes the structural design and maintenance convenience of the pitch control unit a key consideration.

[0003] Due to the harsh working environment and continuous operation, pitch control units require regular maintenance and inspection to ensure system reliability. Maintenance includes electrical connection checks, component status assessments, cooling system cleaning, and software system upgrades. These operations all require opening the cabinet. In special environments such as offshore wind farms, maintenance windows are strictly limited by weather conditions, and working at heights poses safety risks. This necessitates that pitch control units have quick-opening characteristics to shorten maintenance time and reduce operational difficulty. The frequent maintenance needs mean that the convenience and reliability of the cabinet opening and closing mechanism directly affect operation and maintenance costs and work efficiency.

[0004] Traditional pitch control units typically use bolts to secure the cover, requiring operators to carry specialized tools to tighten numerous screws one by one. This method of fixing is time-consuming and labor-intensive during disassembly and installation, especially in the confined space of the engine room. The multi-bolt structure also suffers from issues such as stripped threads and uneven tightening force, which may affect sealing performance after long-term use. The easy loss of screws also poses a safety hazard for working at heights. These shortcomings have prompted the industry to seek more efficient cabinet connection solutions to simplify maintenance processes and improve system reliability. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this utility model is to provide a pitch control unit for wind power generation, so as to solve the problem of the cumbersome installation and disassembly of traditional pitch control units mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pitch control unit for wind power generation, comprising a cabinet body, a cover plate fixedly installed at the upper end of the cabinet body, the cabinet body and the cover plate being connected by a connecting mechanism, a sealing joint fixedly installed at the right end of the cabinet body, and fasteners fixedly installed around the lower end of the cabinet body, with a reinforcing plate fixedly installed between the fasteners and the cabinet body, the fasteners having through holes. The cabinet body serves as the main frame of the device, providing overall support and protection, and the internal space is used to accommodate electrical components and form a sealed protective ring. The cover plate covers the top of the cabinet to form an openable sealed interface. Its flatness ensures a tight fit with the cabinet. The connecting mechanism enables quick assembly and disassembly of the cover plate and the cabinet. Mechanical linkage replaces the traditional bolt fixing method. The sealed joint provides a channel for external cables to pass through while maintaining the cabinet's sealing level. The fasteners firmly install the entire device on the ground or supporting structure. Its load-bearing design distributes the vibration load during equipment operation. The reinforcing plate enhances the mechanical strength of the connection between the fasteners and the cabinet, preventing metal fatigue caused by long-term vibration. The through hole serves as a standardized installation interface to accommodate various fixing bolts.

[0009] Preferably, the connecting mechanism includes a first locking hole, and several first locking holes are fixedly provided on the upper end of the cabinet. The first locking holes and the second locking holes form a precise positioning system to ensure accurate alignment between the cover plate and the cabinet.

[0010] Preferably, the cover plate has a second locking hole corresponding to the position of the first locking hole, and a handle is fixedly provided on the upper side of the cover plate, which serves as a force fulcrum for manual operation.

[0011] Preferably, a connecting rod is fixedly provided at the lower end of the handle, and a locking block is fixedly provided at the end of the connecting rod away from the handle. The connecting rod converts the rotational movement of the handle into the vertical displacement of the locking block. Its rigid material ensures the efficiency of force transmission. The locking block achieves the interlocking function with the locking hole through rotation at a specific angle.

[0012] Preferably, a rubber pad is fixedly provided at the upper end of the card block, and a baffle is movably provided on the connecting rod. The rubber pad forms a buffer layer on the contact surface between the card block and the cabinet, absorbing mechanical vibration and avoiding direct metal-to-metal friction.

[0013] Preferably, a spring washer is fixedly provided at the upper end of the baffle, and a spring is fixedly provided between the spring washer and the handle. The spring washer evenly distributes the spring pressure to avoid local stress concentration, and the spring provides continuous elastic force to maintain the clamping force of the locked state.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This pitch control unit for wind power generation achieves quick locking through the linkage mechanism of the handle driving the connecting rod and the locking block. The cover plate and the cabinet can be tightly fixed by rotating. The cooperation of the spring and the baffle forms bidirectional pressure to ensure a stable connection. The buffer design of the rubber pad effectively absorbs vibration energy. The entire assembly process does not require additional tools, which greatly reduces the operational complexity of maintenance personnel. It is especially suitable for emergency maintenance in high-altitude working environments.

[0016] 2. The pitch control unit used for wind power generation has a millimeter-level fit between the cabinet and the cover through a precision-matched snap-hole system. The sealed joint provides a waterproof and dustproof channel for the cables. The combination design of the reinforcing plate and fasteners enhances the overall structural rigidity. Through holes and standard bolts enable quick ground fixing. The various components work together to form a multi-layer protection system, which can effectively resist the corrosion of electrical components by harsh weather conditions such as salt spray, humidity, and sandstorms.

[0017] 3. The pitch control unit used for wind power generation features an elastic mechanism composed of spring washers and springs that can automatically compensate for gaps caused by component wear. The rotation locking mechanism of the locking blocks and locking holes eliminates the risk of accidental loosening. The limiting function of the baffle prevents overpressure damage to internal components. All moving parts are made of corrosion-resistant materials to ensure stable mechanical performance even under long-term vibration. This self-adjusting structure significantly extends the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the pitch control unit for wind power generation according to this utility model.

[0019] Figure 2 This is a schematic diagram of the installation of the pitch control unit for wind power generation according to this utility model;

[0020] Figure 3 This is a schematic diagram of the connection mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting mechanism of this utility model.

[0022] In the diagram: 1. Cabinet body; 2. Cover plate; 3. Connecting mechanism; 301. First locking hole; 302. Second locking hole; 303. Handle; 304. Connecting rod; 305. Locking block; 306. Rubber pad; 307. Baffle; 308. Spring washer; 309. Spring; 4. Sealing joint; 5. Fixing component; 6. Reinforcing plate; 7. Through hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 This utility model provides a technical solution: a pitch control cabinet for wind power generation. The pitch control cabinet for wind power generation includes a cabinet body 1. A cover plate 2 is fixedly installed on the upper end of the cabinet body 1. The cabinet body 1 and the cover plate 2 are connected by a connecting mechanism 3. A sealing joint 4 is fixedly installed on the right end of the cabinet body 1. Fixing members 5 are fixedly installed around the lower end of the cabinet body 1. A reinforcing plate 6 is fixedly installed between the fixing members 5 and the cabinet body 1. The fixing members 5 have through holes 7. The cabinet body 1, as the main load-bearing structure, provides a protective space for the internal electrical components. Its sealing design prevents external dust and moisture from entering. The cover plate 2 covers the top of the cabinet body 1 to form an openable sealing surface. The connecting mechanism 3 enables quick assembly and disassembly. The sealing joint 4 provides a waterproof channel for external cables while maintaining the airtightness of the cabinet body 1. The fixing members 5 firmly install the entire device on the support surface. The reinforcing plate 6 enhances the vibration resistance of the connection between the fixing members 5 and the cabinet body 1. The through holes 7 serve as a standardized interface to adapt to various mounting bolts.

[0025] The connecting mechanism 3 includes a first locking hole 301. Several first locking holes 301 are fixedly provided on the upper end of the cabinet 1. A second locking hole 302 corresponding to the position of the first locking hole 301 is provided on the cover plate 2. A handle 303 is fixedly provided on the upper side of the cover plate 2. The first locking holes 301 and the second locking holes 302 included in the connecting mechanism 3 form a precise positioning system. The handle 303 serves as a manual operation component to transmit rotational force.

[0026] A connecting rod 304 is fixedly installed at the lower end of the handle 303. A locking block 305 is fixedly installed at the end of the connecting rod 304 away from the handle 303. A rubber pad 306 is fixedly installed at the upper end of the locking block 305. A baffle 307 is movably installed on the connecting rod 304. A spring washer 308 is fixedly installed at the upper end of the baffle 307. A spring 309 is fixedly installed between the spring washer 308 and the handle 303. The connecting rod 304 converts the rotational motion of the handle 303 into linear motion. The locking block 305 achieves mechanical interlocking by rotating at a specific angle. The rubber pad 306 forms a buffer protective layer on the contact surface of the locking block 305. The baffle 307 limits the maximum compression stroke of the spring 309. The spring washer 308 evenly distributes the pressure of the spring 309. The spring 309 provides continuous elastic force to maintain the locked state.

[0027] Working principle: First, align the cover plate 2 on the upper part of the cabinet 1 so that the second locking hole 302 corresponds perfectly with the first locking hole 301. Since the diameter of the second locking hole 302 is exactly the same as that of the first locking hole 301, and the size of the locking block 305 is smaller than the diameter of the first locking hole 301 and the second locking hole 302, the operator presses down the connecting rod 304 by holding the handle 303, which drives the locking block 305 through the second locking hole 302 and continues to penetrate the first locking hole 301. During this process, the rubber pad 306 moves synchronously with the locking block 305 to buffer and prevent shock. At the same time, the baffle 307, because its size is larger than the first locking hole 301 and the second locking hole 302, is blocked outside the cover plate 2. At this time, the spring washer 308, which is fixed on the upper part of the baffle 307, moves down and compresses the spring 309 to produce elastic deformation. When the locking block... After 305 passes completely through the first locking hole 301, rotate the handle 303 ninety degrees to make the locking block 305 and the first locking hole 301 form a horizontal locking. After releasing the handle 303, the compressed spring 309 pushes the baffle 307 downward to press the surface of the cover plate 2 through the spring washer 308. At the same time, the locking block 305 pushes the inner wall of the cabinet 1 upward through the rubber pad 306. This achieves tool-free quick locking between the cover plate 2 and the cabinet 1. When disassembly is required, rotate the handle 303 ninety degrees in the opposite direction to release the locking state. The entire assembly process achieves efficient sealing through the mechanical linkage of the connecting mechanism 3. The sealing joint 4 at the right end of the cabinet 1 provides a waterproof channel for the cable. The fixing part 5 fixes the cabinet 1 to the base through the through hole 7 and the bolt. The reinforcing plate 6 enhances the connection strength between the fixing part 5 and the cabinet 1 to withstand the vibration load of the wind power generation equipment.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

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