CN1862010A - Pinhole inserted yaw brake of wind electricity generator - Google Patents

Abstract

The utility model relates to a pin-hole insertion type yaw braking device of a wind-driven generator, which belongs to a mechanical brake device of a wind-driven machine yaw-braking electric or hydraulic drive combined with a spring action. The device is to drill and install the taper pin and its driving device on the fixed part and the rotating part of the slewing support mechanism of the wind turbine respectively; or drill holes on the brake disc and install the taper pin and its driving device on the appropriate position of the slewing chassis . The plug-in yaw braking device of the wind power generator provided by the present invention not only has simple structure, requires little operating force, reliable braking, and low cost, but also is easy to implement "fail safe" design.

Description

A pin-hole-inserted yaw braking device for a wind turbine

technical field

The invention relates to a yaw braking device of a wind power generator, in particular to a plug-in yaw braking device of a wind power generator, which belongs to the technical field of wind power generation equipment.

Background technique

Existing yaw braking adopts hydraulic brakes, and the friction plates of the brakes are pressed against the brake discs under oil pressure, and the braking force is provided by the friction between the two. The main disadvantages of this type of brake are: 1. High oil pressure is required: 14-16MPa, so a special high-pressure hydraulic system is required. ②The brake disc must be kept clean. Due to the harsh natural environment and the leakage of hydraulic oil, lubricating oil, etc. that cannot be completely avoided, the friction coefficient will be greatly reduced and the reliability of braking will be reduced. ③The brake disc may be deformed, causing additional friction when braking is not required, and increasing the resistance of yaw driving. ④The system structure is more complex and the cost is higher. ⑤ Difficult to adopt "fail-safe" design. There needs to be quite a lot of friction between the pads and the disc, and it's quite difficult to use a spring to generate that much pressure.

Contents of the invention

Aiming at the deficiencies and defects existing in the existing wind turbine yaw braking technology, the present invention provides a wind turbine conical pin plug-in yaw brake device, which not only has a simple structure, requires little operating force, and is easy to brake. Reliable, inexpensive, and easy to implement "fail-safe" designs.

The technical scheme provided by the invention is as follows:

A pin-hole insertion type yaw braking device for a wind power generator, which includes a slewing support mechanism of an outer yaw gear, a nacelle base and a tower, and is characterized in that: on the inner bearing ring of the slewing support mechanism, along the same A series of conical holes are arranged on the circumference at equal intervals in the axial or radial direction, and one or more conical pins matched with the conical holes and a driving device for driving the conical pins are installed on the tower.

A pin-hole insertion type yaw braking device for a wind power generator, which includes a slewing support mechanism of an inner yaw gear, a nacelle base and a tower, and is characterized in that: on the outer bearing ring of the slewing support mechanism, along the same A series of conical holes are arranged on the circumference at equal intervals in the axial or radial direction, and one or more conical pins matched with the conical holes and a driving device for driving the conical pins are installed on the tower.

A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of an outer yaw gear, a nacelle base, a tower and a brake disc, the outer yaw gear and the brake disc are fixed together, It is characterized in that: a series of conical holes are arranged on the brake disc at equal axial intervals along the same circumference, and one or more conical pins matched with the conical holes and used for driving are installed on the base of the nacelle. The driving device of the garden taper pin.

A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of an inner yaw gear, a nacelle base, a tower and a brake disc, the inner yaw gear and the brake disc are fixed together, It is characterized in that: a series of conical holes are arranged on the brake disc at equal axial intervals along the same circumference, and one or more conical pins matched with the conical holes and used for driving are installed on the base of the nacelle. The driving device of the garden taper pin.

The technical characterictic of the present invention also is: the center-to-center distance of a series of garden taper holes arranged at equal intervals on the same circumference can be greater than the diameter of the hole, also can be equal to the diameter of the hole or less than the diameter of the hole.

In the above technical solution, the driving device may be a hydraulic or electromagnetic coil driving device. The conical pin can be a single-tapered conical pin, a double-tapered conical pin, or a conical pin with a spherical upper end.

Compared with the prior art, the present invention has the following advantages and outstanding effects: the wind power generator pin-hole insertion type yaw braking device provided by the present invention not only has a simple structure, requires little operating force, reliable braking, and relatively low cost. Low, and easy to implement "fail-safe" design.

Description of drawings

Fig. 1 is a schematic diagram of linear development of radial or axial conical holes provided on the same circumference of a bearing ring or a brake disc.

Figures 2a, 2b, and 2c are schematic structural views of a single-taper conical pin, a double-taper conical pin, or a conical pin with a spherical upper end provided by the present invention, respectively.

Fig. 3 is a schematic structural diagram of a yaw slewing bearing mechanism with an external yaw gear.

Fig. 4 is a structural schematic diagram of an embodiment in which radial holes are provided on the inner bearing ring and tapered pins are installed on the tower when the outer yaw gear slewing support mechanism is used.

Fig. 5 is a structural schematic diagram of another embodiment in which the outer yaw gear slewing support mechanism is used, an axial hole is provided on the inner bearing ring, and the conical pin is installed on the tower.

Fig. 6 is a structural schematic diagram of another embodiment in which the inner yaw gear slewing support mechanism is used, an axial hole is provided on the outer bearing ring, and the tapered pin is installed at a fixed position relative to the inner bearing ring.

Fig. 7 is a schematic diagram of the position of the tapered pin, its driving device and the pin hole when using a specially set brake disc.

In the figure: 1-outer yaw gear; 2-outer bearing ring of yaw slewing ring; 3-inner bearing ring of yaw slewing ring; 4-tower; 5-cone pin driving mechanism; 6-cone pin; 7-cone Hole; 8-swivel base flange; 9-brake disc; 10-inner yaw gear.

Detailed ways

The specific structure of the present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of straight line development of radial or axial boreholes provided on the bearing ring. A series of conical holes are arranged at equal intervals in the axial or radial direction along the same circumference. According to the requirements of yaw accuracy, the hole center distance of these holes can be greater than the diameter of the hole, equal to the diameter of the hole or smaller than the diameter of the hole. Fig. 2 is a schematic structural view of a conical pin, which can be a single-taper conical pin, a double-taper conical pin, or a conical pin with a spherical upper end. The inner and outer bearing rings of the yaw slewing ring are static and dynamic. The stationary bearing ring is fixed to the tower, and the rotating bearing ring is connected to the base of the nacelle. The conical hole and the conical pin are respectively arranged on the dynamic and static parts of the yaw slewing bearing mechanism.

FIG. 3 is a schematic structural diagram of a yaw slewing ring with an outer yaw gear, which includes an outer yaw gear 1 , an outer bearing ring 2 of the yaw slewing ring and an inner bearing ring 3 of the yaw slewing ring.

Figure 4 is a schematic diagram of the position of the tapered pin and the pin hole when the outer yaw gear slewing support mechanism is used and radial holes are provided on the inner bearing ring. On the inner bearing ring 3 of the slewing support mechanism, a series of tapered holes are arranged at equal distances in the axial or radial direction along the same circumference, and one or more are installed on the tower flange 4 The taper pin 6 that the garden taper hole matches and is used to drive the driving device 5 of the garden taper pin.

Figure 5 is a schematic diagram of the position of the tapered pin and the pin hole when the outer yaw gear slewing support mechanism is used and the inner bearing ring is provided with an axial hole. On the inner bearing ring 3 of the slewing support mechanism, a series of tapered holes are arranged at equal intervals in the axial or radial direction along the same circumference, and one or more are installed on the tower flange 4 with The taper pin 6 that the garden taper hole matches and is used to drive the driving device 5 of the garden taper pin.

Figure 6 is a schematic diagram of the position of the conical pin and the pin hole when the internal yaw gear slewing support mechanism is used. The figure shows that on the outer bearing ring 2, a series of axial conical cones are arranged at the same axial distance along the same circumference. Hole 7, one or more taper pins 6 matched with the garden taper hole and the driver 5 for driving the garden taper pins are installed on the tower frame 4.

Fig. 7 is a schematic diagram of the position of the tapered pin and the pin hole when using a special brake disc. The figure contains the slewing support mechanism of the outer yaw gear, the nacelle base, the tower and the brake disc 9, the outer yaw gear and the brake disc are fixed together, and on the same circumference of the brake disc, the A series of garden taper holes 7 are arranged at equal intervals in the axial direction, and one or more taper pins 6 matched with the garden taper holes and the driving device 5 for driving the garden taper pins are installed on the nacelle base 8 .

In order to prevent the taper pin from being locked with the pin hole, causing difficulty in returning the taper pin, it can be considered that the taper angle of the main part of the taper pin is slightly smaller or slightly larger than the taper angle of the taper hole. At this time, the contact between the tapered pin and the tapered hole is a line contact. In order to properly increase the contact area, the top of the tapered pin or the end face of the tapered hole can be chamfered appropriately. It is also possible to make protrusions or grooves on the surface of the tapered pin.

The driving device 5 that the tapered pin is inserted into the tapered hole can be driven in by hydraulic pressure or electromagnetic coil power, and the design of spring return; it can also adopt the design of "fail safe", that is, the spring is pressed in, and the hydraulic pressure or electromagnetic coil power is returned. Since the device does not require a large driving force, a "fail-safe" design can be easily implemented to ensure the safety of the unit in the event of loss of hydraulic pressure or power.

For the yaw slewing ring adopting the inner yaw gear, the tapered hole is arranged on the outer bearing ring, and the tapered pin and its driving equipment are installed on the component relatively fixed to the inner bearing ring and the inner yaw gear. The specific layout depends on the structure of the specific model.

Yaw Accuracy and Operating Instructions

1). When the taper pin plug-in brake device is used, the distance between the center of the hole is approximately equal to the diameter, and 300 taper holes with a diameter of 30mm can be set on a 9m circle. At this time, the "resolution" of yaw is 360/300=1.2°, and the maximum deviation of yaw control is 0.6°. The general error is between 0 and 0.6°. If overlapping taper holes are used, that is, the hole center distance is smaller than the diameter, for example, the hole center distance is approximately equal to the radius, then 600 taper holes with a diameter of 30mm can be set on a 9m circle. At this time, the "resolution" of yaw is 360/600=0.6°, and the maximum deviation of yaw control is 0.3°. The general error is between 0 and 0.3°. If the diameter of the braking cone pin can be smaller and the number of braking cone pins can be increased, the accuracy of yaw control can be further improved.

2). If the yaw target position makes the taper hole misaligned with the taper pin, but the deviation is small, relying on the taper surface of the taper pin, the taper pin can still be pushed to the engagement position.

3). In order to make the yaw brake taper pins more accurately aligned with the taper holes for insertion, the method of using the control system to precisely control the yaw angle can be considered, and at the same time install position sensors at the corresponding positions of each brake to adjust the yaw angle. At the end, it is judged whether the tapered pin has been inserted, so as to ensure the safe and reliable operation of the unit. For example, if 600 continuous holes are evenly distributed on the circumference, the yaw control accuracy is 0.6°. If a yaw of 20° is required, the angle at which the yaw control makes the nacelle rotate is an integer multiple of 0.6° closest to 20°, namely: 20/0.6=33.3, rounded up to 33, and the angle of yaw control is 33×0.6 =19.8°. At this time, the yaw angle deviation is 0.2°.

Claims (7)

1. A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of an outer yaw gear, a nacelle base and a tower, is characterized in that: on the inner bearing ring of the slewing support mechanism, A series of conical holes are arranged at equal intervals in the axial or radial direction along the same circumference, and one or more conical pins matched with the conical holes and a drive for driving the conical pins are installed on the tower device. 2. A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of an inner yaw gear, a nacelle base and a tower, characterized in that: on the outer bearing ring of the slewing support mechanism, A series of conical holes are arranged at equal intervals in the axial or radial direction along the same circumference, and one or more conical pins matched with the conical holes and a drive for driving the conical pins are installed on the tower device. 3. A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of the outer yaw gear, a nacelle base, a tower and a brake disc, and the outer yaw gear and the brake disc are fixed on Together, it is characterized in that: a series of conical holes are arranged on the brake disc at equal axial intervals along the same circumference, and one or more conical pins and A drive unit for driving a tapered pin. 4. A pin-hole insertion type yaw braking device for a wind power generator, comprising a slewing support mechanism of an inner yaw gear, a nacelle base, a tower and a brake disc, and the inner yaw gear and the brake disc are fixed on Together, it is characterized in that: a series of conical holes are arranged on the brake disc at equal axial intervals along the same circumference, and one or more conical pins and A drive unit for driving a tapered pin. 5. According to claim 1, 2, 3 or 4 described pin hole insertion type yaw braking device for wind power generator, it is characterized in that: the center-to-center distance of a series of conical holes equidistant on the same circumference is Greater than, equal to, or smaller than the diameter of the hole. 6. The pin-hole-inserted yaw braking device for wind power generators according to claim 1, 2, 3 or 4, characterized in that the drive device is a hydraulic or electromagnetic coil drive device. 7. According to claim 1, 2, 3 or 4, the wind turbine pin-hole insertion type yaw braking device is characterized in that: said conical pin is a single-taper conical pin, a double-taper conical pin, or an upper end A conical pin with a spherical surface.

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