CN209818207U

CN209818207U - Yaw brake system of wind turbine generator

Info

Publication number: CN209818207U
Application number: CN201920607069.9U
Authority: CN
Inventors: 吴自军; 阮荞云; 李纳; 赵涛
Original assignee: Malonyun Energy Investment New Energy Development Co Ltd
Current assignee: Malonyun Energy Investment New Energy Development Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2019-12-20
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a wind turbine generator system's driftage braking system, draw together the clamshell, the axis of rotation, impeller and step-up gear box, install the driftage brake disc in the axis of rotation, the upside and the downside symmetry of driftage brake disc are provided with brake mechanism, install lifting support between brake mechanism and the clamshell, brake mechanism includes base and fixed cover, the nested brake bucket that has in the fixed cover, slidable mounting has the piston in the brake bucket, the brake block is installed to one side of piston, the piston rod is installed to the opposite side, the dress is worn in hollow sliding sleeve to the tip of piston rod, install the spring between piston rod and the hollow sliding sleeve, be provided with on the base and supply oil pipe, supply oil pipe's one end and brake bucket intercommunication, the other end is fixed with the base through sealed pad and nut, be provided with the batch oil tank in the clamshell, through the oil hose. The device has the advantages of reasonable structural design, long service life, high maintenance cost, convenient disassembly and replacement and remarkable braking effect.

Description

Yaw brake system of wind turbine generator

Technical Field

The utility model belongs to the technical field of wind power generation, concretely relates to driftage braking system of wind turbine generator system.

Background

Wind power generation is a green and pollution-free new energy and is widely applied in various countries in the world. Through years of development, the domestic wind power market is basically mature, and the demand of wind power equipment is rapidly increased. The yaw brake is an important component of a braking system of the wind turbine generator, the braking performance of the yaw brake directly determines whether the wind turbine generator can normally operate, and the hydraulic yaw brake is generally applied to the wind turbine generator due to the advantages of convenience and adjustability of pressure and the like. Fan driftage stopper realizes the braking through the friction between friction disc and the brake disc, when the wind direction changes, the cabin on pylon top begins yawing motion, at this moment, hydraulic brake dish is in half release state, for the rotatory stable damping force that provides of cabin, prevent that the fan from taking place the unstability phenomenon, ensure the flat and definite rotation in cabin, after driftage is to the wind, hydraulic brake dish will be in the full pressure state, guarantee the stability in wind generator normal operating time cabin, prevent that the cabin from rotating at will under the strong wind state, lead to inaccurate to the wind direction, influence the generating efficiency. The existing yaw brake is to connect a yaw bearing with internal teeth at the top of a tower barrel through a bolt, an outer ring of the yaw brake is connected with a cabin seat, an inner ring is connected with a tower frame flange, a certain gap exists between a rotating bearing connected with the tower barrel and the cabin, the brake mechanism can generate large friction in the using process, the thickness of a brake disc is easily reduced after the yaw brake is used for a period of time, when the brake effect is seriously affected, the brake disc is fixedly connected with a brake main body, the yaw brake needs to be integrally replaced during replacement, and the dismounting and the replacement are complicated. Therefore, the yaw brake system of the wind turbine generator set, which is reasonable in structural design, long in service life, low in maintenance cost, convenient to disassemble, assemble and replace, remarkable in brake effect and capable of greatly improving the practicability of the device, is objectively needed.

Disclosure of Invention

An object of the utility model is to provide a wind turbine generator system's driftage braking system that structural design is reasonable, long service life, maintenance cost are low, the dismouting is changed conveniently, the braking effect is showing, and can improve the device practicality by a wide margin.

The utility model aims at realizing the purposes, which comprises a casing cover, a rotating shaft, an impeller and an accelerating gearbox, wherein a yaw brake disc is arranged on the rotating shaft provided with the impeller and the accelerating gearbox, brake mechanisms are symmetrically arranged at the upper side and the lower side of the yaw brake disc, a lifting bracket is arranged between the brake mechanisms and the casing cover, each brake mechanism comprises a base and a fixed cover, the fixed covers are symmetrically arranged at two sides of the upper surface of the base, brake barrels are nested in the fixed covers, the openings of the two brake barrels are oppositely arranged, the brake barrels and the fixed covers are fixedly connected through countersunk screws, pistons are arranged in the brake barrels in a sliding way, brake pads are arranged on the pistons at one side facing to the openings, piston rods are arranged on the pistons at one side opposite to the openings, the end parts of the piston rods are penetrated in the hollow sliding sleeves and then connected with springs arranged in the hollow sliding sleeves, the hollow sliding sleeves are fixed, the base is provided with an oil supply pipe, one end of the oil supply pipe is communicated with a cavity formed by surrounding the piston and the bottom of the brake drum, the other end of the oil supply pipe is fixed with the base through a sealing gasket and a nut, an oil storage tank is arranged in the casing cover and is communicated with the oil supply pipes through oil delivery hoses, and the oil delivery hoses are provided with pressure pumps.

Further, the lifting support comprises a fixed plate and a hydraulic cylinder, at least 2 lower connecting rods are mounted on the fixed plate, an upper connecting rod is mounted at the upper end of each lower connecting rod in a hinged mode through a hinged shaft, the upper end of each upper connecting rod is fixedly connected with the base, a telescopic rod of the hydraulic cylinder is mounted on each upper connecting rod, a cylinder seat of the hydraulic cylinder is mounted on the fixed plate, and the fixed plate is mounted on the casing cover through fastening bolts.

Furthermore, an O-shaped sealing ring is arranged between the piston and the brake barrel.

Furthermore, a buffer plate is arranged between the brake pad and the piston, and the buffer plate and the brake pad are fixedly connected through a sunk screw.

Furthermore, a plurality of hook nails with conical heads are arranged on the surfaces of the brake pad and the yaw brake disc, and friction material layers covering the hook nails are hot-pressed on the surfaces of the brake pad and the yaw brake disc.

The utility model has the advantages that: firstly, a double-brake mechanism is utilized to brake a yawing brake disc, the braking effect is improved by bilateral braking, and in the braking process, the stress of a brake disc can be uniform, the rotating shaft and the brake disc are not easy to damage, the load of the rotating shaft can be effectively shared, the service life of the rotating shaft is prolonged, the maintenance and replacement frequency of the rotating shaft is reduced, the working efficiency of a generator set is indirectly improved, a better braking effect is achieved, and the purpose of timely braking can be achieved; secondly, the brake pad and the piston, the piston and the brake barrel, and the brake barrel and the fixed cover are movably mounted, so that the brake pad is convenient to disassemble, assemble and replace, time and labor are saved, the brake mechanism is not required to be integrally replaced, only the wearing parts are required to be replaced independently, and the use and maintenance cost in the later period can be effectively controlled; thirdly, the lifting support who sets up can adjust brake mechanism's height to satisfy the braking user demand of the driftage brake disc of different models, further improvement the practicality of device. The device has the advantages of reasonable structural design, long service life, high maintenance cost, convenient disassembly and replacement and remarkable braking effect, and is easy to popularize and use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a brake mechanism;

in the figure, 1-oil storage tank, 2-speed-increasing gear box, 3-oil delivery hose, 4-casing cover, 5-fastening bolt, 6-yaw brake disc, 7-brake mechanism, 701-fixed plate, 702-hydraulic cylinder, 703-base, 704-oil supply pipe, 705-brake barrel, 706-spring, 707-countersunk screw, 708-piston, 709-brake pad, 710-buffer plate, 711-O type sealing ring, 712-piston rod, 713-hollow sliding sleeve, 714-upper connecting rod, 715-articulated shaft, 716-lower connecting rod, 717-fixed cover, 8-impeller and 9-rotating shaft.

Detailed Description

The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.

As shown in fig. 1-2, the utility model comprises a casing cover 4, a rotating shaft 9, an impeller 8 and an accelerating gearbox 2, the installation mode of the rotating shaft 9, the impeller 8 and the accelerating gearbox 2 on the casing cover 4 can be according to the installation mode of the existing structure, a yaw brake disc 6 is installed on the rotating shaft 9 which is provided with the impeller 8 and the accelerating gearbox 2, the upper side and the lower side of the yaw brake disc 6 are symmetrically provided with brake mechanisms 7, a lifting bracket is installed between the brake mechanisms 7 and the casing cover 4, the brake mechanisms 7 can be driven to lift by the lifting bracket, the brake mechanisms 7 comprise a base 703 and a fixed cover 717, the brake barrels 717 are barrel-shaped, the fixed cover 717 are symmetrically installed on two sides of the upper surface of the base 703, the brake barrels 705 are nested in the fixed cover 717, the barrel mouths of the two brake barrels 705 are arranged oppositely, the brake barrels 705 and the fixed cover 717 are connected and fixed by countersunk head screws 707, sliding mounting has piston 708 in brake bucket 705, installs brake block 709 on piston 708 towards bung hole one side and installs piston rod 712 on the piston 708 of bung hole one side dorsad, the tip of piston rod 712 wears to adorn in hollow sliding sleeve 713 back and links to each other with the spring 706 of installing in hollow sliding sleeve 713, hollow sliding sleeve 713 is fixed in brake bucket 705's bottom, be provided with on the base 703 and supply oil pipe 704, the cavity intercommunication that encloses at the bottom of supplying oil pipe 704 and piston 708 and brake bucket 705 barrel, the other end of supplying oil pipe 704 is fixed with base 703 through sealed pad and nut, be provided with oil storage tank 1 in the quick-witted clamshell 4, communicate through oil hose 3 between oil storage tank 1 and each supply oil pipe 704, install the force (forcing) pump on the oil hose 3.

The utility model discloses a theory of operation is: the impeller 8 can rotate by wind power, the impeller 8 drives the rotating shaft 9 to rotate, when braking is needed, the lifting bracket drives the base 703 to ascend, after the lifting bracket ascends to a proper height, the pressure pump sends the hydraulic oil in the oil storage tank 1 into the brake barrel 705 through the oil delivery hose 3 and the oil supply pipe 704, the hydraulic oil entering the brake barrel 705 can push the piston 708 and the brake pads 709 to move towards the yawing brake disc 6, so that the yawing brake disc 6 is clamped by the two brake pads 709, when the yawing brake disc 6 is clamped by the two brake pads 709 at the upper side and the lower side, the yawing brake disc 6 can be timely braked, when braking is not needed, the pressure pump is closed, the hydraulic oil in the brake barrel 705 flows back into the oil storage tank 1, the pressure in the brake barrel is reduced, the piston rod 712 is pulled back to the initial position by the spring 706, the yawing brake disc 6 is braked by the double-brake mechanism, bilateral braking has improved the effect of braking, and in the braking, the atress of brake disc 6 is even in the time of can, axis of rotation 9 and brake disc 6 are not fragile, can effectually share the load of axis of rotation 9, the life of extension axis of rotation, reduce the maintenance of axis of rotation and change the frequency, indirect work efficiency who has improved generating set, better braking effect has again, can reach the purpose of in time braking, when needs are changed brake block 709, only need take out countersunk screw 707 between brake block 709 and piston 708, it can to change new brake block 709, its dismouting is changed more convenient, time saving and labor saving, and need not carry out the overall change to brake mechanism 7, only need to change alone wearing parts can, can the use cost of maintenance in effectual control later stage.

Further, the lifting bracket comprises a fixing plate 701 and a hydraulic cylinder 702, at least 2 lower connecting rods 716 are mounted on the fixing plate 701, an upper connecting rod 714 is hinged to the upper end of each lower connecting rod 716 through a hinge shaft 715, the upper end of the upper connecting rod 714 is fixedly connected with the base 703, the telescopic rod of the hydraulic cylinder 702 is arranged on the upper connecting rod 714, the cylinder seat of the hydraulic cylinder 702 is arranged on the fixing plate 701, the fixing plate 701 is installed on the casing cover 4 through a fastening bolt 5, and when the brake mechanism needs to be lifted, the hydraulic cylinder 702 works to drive the upper connecting rod 714 to rotate clockwise, the upper connecting rod 714 rotates and simultaneously drives the base 703 to ascend, when the height is required, the hydraulic cylinder 702 stops acting, this lifting support is strong at the in-process stability of use, uses with brake mechanism 7 cooperation and can reach better braking effect.

In order to avoid oil leakage, an O-ring 711 is disposed between the piston 708 and the brake drum 705.

In order to reduce the impact force generated by the brake pad 709 on the piston 708 in the braking process, a buffer plate 710 is arranged between the brake pad 709 and the piston 708, and the buffer plate 710 and the brake pad 709 are fixedly connected through a sunk screw 707.

In order to further improve the braking capability and mechanical strength of the brake pad 709, a plurality of hook nails with conical heads are arranged on the surfaces of the brake pad 709 and the yaw brake disc 6, and a friction material layer covering the hook nails is hot pressed on the surfaces of the brake pad 709 and the yaw brake disc 6.

Claims

1. The utility model provides a wind turbine generator system's driftage braking system, includes quick-witted clamshell (4), axis of rotation (9), impeller (8) and step-up gear (2), its characterized in that: a yaw brake disc (6) is arranged on a rotating shaft (9) provided with an impeller (8) and a speed-up gear box (2), brake mechanisms (7) are symmetrically arranged on the upper side and the lower side of the yaw brake disc (6),

a lifting support is arranged between the brake mechanism (7) and the casing cover (4), the brake mechanism (7) comprises a base (703) and a fixed cover (717), the fixed cover (717) is symmetrically arranged at two sides of the upper surface of the base (703), a brake barrel (705) is nested in the fixed cover (717), the openings of the two brake barrels (705) are oppositely arranged, the brake barrel (705) and the fixed cover (717) are fixedly connected through a countersunk head screw (707), a piston (708) is slidably arranged in the brake barrel (705), a brake pad (709) is arranged on the piston (708) at one side facing the opening, a piston rod (712) is arranged on the piston (708) at one side facing away from the opening, the end part of the piston rod (712) is connected with a spring (706) arranged in a hollow sliding sleeve (713) after being penetrated in the hollow sliding sleeve (713), and the hollow sliding sleeve (713) is fixed at the bottom of the brake barrel (705), be provided with on base (703) and supply oil pipe (704), the cavity intercommunication that the one end and piston (708) and brake bucket (705) barrel head of supplying oil pipe (704) enclose, the other end that supplies oil pipe (704) is fixed with base (703) through sealed pad and nut, be provided with batch oil tank (1) in quick-witted shell cover (4), through oil hose (3) intercommunication between batch oil tank (1) and each supply oil pipe (704), install the force (forcing) pump on oil hose (3).

2. The yaw brake system of the wind turbine generator according to claim 1, wherein: the lifting support comprises a fixing plate (701) and a hydraulic cylinder (702), at least 2 lower connecting rods (716) are mounted on the fixing plate (701), an upper connecting rod (714) is mounted at the upper end of each lower connecting rod (716) in a hinged mode through a hinge shaft (715), the upper end of each upper connecting rod (714) is fixedly connected with a base (703), a telescopic rod of the hydraulic cylinder (702) is mounted on the upper connecting rod (714), a cylinder seat of the hydraulic cylinder (702) is mounted on the fixing plate (701), and the fixing plate (701) is mounted on a machine shell cover (4) through fastening bolts (5).

3. The yaw brake system of the wind turbine generator according to claim 1, wherein: an O-shaped sealing ring (711) is arranged between the piston (708) and the brake barrel (705).

4. The yaw brake system of the wind turbine generator according to claim 1, wherein: a buffer plate (710) is arranged between the brake pad (709) and the piston (708), and the buffer plate (710) and the brake pad (709) are fixedly connected through a sunk screw (707).

5. The yaw brake system of the wind turbine generator according to claim 1, wherein: the surface of the brake block (709) and the yaw brake disc (6) are provided with a plurality of hook nails with conical heads, and friction material layers covering the hook nails are hot-pressed on the surface of the brake block (709) and the yaw brake disc (6).