CN201103516Y - Yawing brake of aerogenerator - Google Patents

Abstract

The utility model relates to a yaw brake of a wind power generator, which comprises a left substrate and a right substrate; the two substrates are connected into a whole by a connecting part; the under parts of the substrates are designed to be hydraulic cylinders; the facing surface of the under parts of the two substrate is an assembling surface of friction plates; the friction plates are respectively arranged on the assembling surface; the assembling surface of the friction surface is a plane surface; the back surface of the friction plates matches the plane surface and is corresponding to the end surface of a piston of the hydraulic cylinder; a baffle is respectively arranged on the front end surface and the back end surface of the under part of the substrate to keep off the front end surface and the back end surface of the friction plates; the friction plates are powder metallurgy friction plates. The yaw brake has the advantages of simple operation and time saving when the friction plates are installed and disassembled.

Description

Wind Turbine Yaw Brake

technical field

The utility model relates to a brake, in particular to a yaw brake of a wind power generator.

Background technique

The safety brakes of large wind turbines (such as 1.5MW) usually use Danish Svendborg brakes, whose technical level is world-class. Its main feature is that the friction plate has high hardness and good performance, but there are still deficiencies in the structure. That is to say, the part where the friction plate is installed on the substrate is a sinker structure, and the friction plate is located in the sinker tank, which is inconvenient for loading and unloading, while the friction plate is a wearing part, which needs to be replaced in time after wear, which is difficult and time-consuming to install and disassemble.

Contents of the invention

The utility model provides a yaw brake of a wind power generator. The friction plate of the brake is easy to assemble and disassemble. The technical solution is:

A yaw brake for a wind power generator, including left and right bases, the two bases are connected as a whole by a connecting piece, the lower part of the base is designed as a hydraulic cylinder; the opposite surface of the lower part of the two bases is the assembly surface of the friction plate, respectively arranged There is a friction plate, the assembly surface of the friction plate is a through plane, and the back of the friction plate is matched with the through plane, corresponding to the end face of the hydraulic cylinder piston; baffle plates are respectively arranged on the front and rear end faces of the lower part of the base body to block the front and rear sides of the friction plate. end face.

The friction plate is a powder metallurgy friction plate.

The advantage of the brake is that since the assembly surface of the friction plate is a flat plane, the front and rear end surfaces of the friction plate are blocked by the baffle plate to realize positioning. When loading and unloading the friction plate, the friction plate can be installed or removed only by removing the baffle plate, which is easy to operate and saves time.

Description of drawings

Figure 1 is the structural diagram of the brake

Figure 2 is the left side view of Figure 1

Figure 3 is a top view of Figure 1

Figure 4 is the B-B view of Figure 1

Detailed ways

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4: the brake comprises a left base body 4 and a right base body 6, the two base bodies are connected as a whole by bolts 3, and a backing plate 5 is placed in the middle to keep a certain distance between the two base bodies. The top of the substrate is provided with a lifting ring 2, which is convenient for installation and lifting. The lower part of the base body is processed into hydraulic cylinders, each base body has two hydraulic cylinders arranged side by side, the oil chambers of the two hydraulic cylinders are connected, and the pistons 11 of the two hydraulic cylinders can move synchronously. The base body is provided with a pressure oil input joint 1, which communicates with the oil chamber of the hydraulic cylinder, and drives the piston 11 to move synchronously. The cylinder wall is provided with a sealing ring 10, which seals the gap between the piston 11 and the cylinder wall, and the hole left during the processing of the oil cavity is blocked with a plug 8.

The hydraulic cylinders of the left and right substrates 4 and 6 are arranged opposite to each other. The opposite surfaces of the lower parts of the two substrates are the assembly surfaces of the friction plates, and the friction plates 12 are respectively arranged. The assembly surfaces of the friction plates 12 are through planes. The plane fits, corresponding to the end face of the hydraulic cylinder piston 11; the front and rear end faces of the lower part of the base body are respectively provided with baffles 9 to block the front and rear end faces of the friction plate 12.

The advantage of this structure is that it is very convenient to load and unload the friction plate 12. When installing, the friction plate 12 is loaded into the assembly surface, and then the baffle plate 9 is installed on the side of the base body with screws 7 to fix the friction plate 12. During disassembly, the screw 7 and the baffle plate 9 are removed, and the friction plate 12 can be taken out.

During the working process of the brake, the pressure oil enters the oil chamber of the hydraulic cylinder through the input joint 1, and the piston 11 stretches out, pushing the left and right friction plates 12 to move towards each other, and friction is generated after contact to realize braking.

The braking effect is related to the oil pressure and the friction coefficient of the friction plate. Therefore, this brake adopts a self-made powder metallurgy material friction plate. The powder metallurgy specific pressure of the friction plate is 3.2MPa, the static friction coefficient is 0.4, and the dynamic friction coefficient is 0.35. , working temperature 200 ~ 400 ℃, the highest working temperature 750 ℃, its technical indicators have reached or exceeded the world's advanced level. At present, the world's most advanced friction plate is the Danish Svendborg and Sim company, whose powder metallurgy specific pressure is 3MPa, the static friction coefficient is 0.4, the dynamic friction coefficient is 0.35, and the working temperature is 200-400°C.

Claims (2)

1. A wind-driven generator yaw brake, comprising left and right substrates, the two substrates are connected as a whole by a connector, and the bottom of the substrate is designed as a hydraulic cylinder; the facing surfaces of the bottom of the two substrates are the assembly surfaces of the friction plates, Friction plates are respectively arranged, and the feature is that: the assembly surface of the friction plates is a through plane, and the back of the friction plates cooperates with the through plane, corresponding to the end face of the hydraulic cylinder piston; baffle plates are respectively arranged on the front and rear end faces of the lower part of the base body , to block the front and rear end surfaces of the friction plate. 2. The yaw brake of the wind power generator according to claim 1, characterized in that: the friction plate is a powder metallurgy friction plate.

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