CN215979690U

CN215979690U - High-pressure yaw brake of wind generating set

Info

Publication number: CN215979690U
Application number: CN202122200470.0U
Authority: CN
Inventors: 丁雷; 吕珏
Original assignee: Jiangsu Tieke New Material Co ltd
Current assignee: Jiangsu Tieke New Material Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-03-08
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a high-pressure yaw brake of a wind generating set. The brake comprises a mounting base, two half-and-half brakes and a brake disc, wherein the two half-and-half brakes are provided with a plurality of cylinder holes provided with pistons, the two half-and-half brakes are also provided with accommodating grooves, friction plates are arranged in the accommodating grooves, two sealing ring grooves are arranged in each cylinder hole, a sealing ring is arranged in each sealing ring groove of each cylinder hole, an oil through hole is arranged between every two adjacent cylinder holes, and each half-and-half brake is at least provided with an oil return hole. The advantages are that: the cleanness of the working environment is ensured, sufficient pressure is also ensured, and the braking effect is greatly improved. The weak link is avoided, and the strength of the wall surface between the two cylinder holes is effectively improved. The contact area between the piston and hydraulic oil is increased, and the working efficiency of the piston is effectively improved. The weight of the cylinder body is reduced, and the manufacturing cost is reduced; the strength of the whole brake is effectively increased, and the unique personality of the appearance structure of the cylinder body is revealed.

Description

High-pressure yaw brake of wind generating set

Technical Field

The utility model relates to a yaw brake, in particular to a high-pressure yaw brake of a wind generating set, and belongs to the technical field of wind power generation.

Background

The yaw brake of the wind generating set mainly comprises a mounting base, an upper half brake, a lower half brake, a brake disc, friction plates, pistons and the like, wherein the upper brake and the lower brake are mounted on the mounting base; when hydraulic oil is decompressed, the main machine is driven by the yaw motor to realize yaw with friction force.

At present, the most common 120-cylinder-diameter yaw brake in China has working pressure of 160bar and a friction coefficient of 0.40, when the pressure and the friction coefficient are simultaneously improved by 10% -20%, the braking torque is improved in the same proportion, the using quantity of the yaw brake can be reduced by about 15%, the purchasing cost is reduced, and particularly, the yaw brake is directed at a large-capacity wind turbine generator, however, in the prior art, because the structural design of the yaw brake is unreasonable, the braking torque is difficult to improve, and the main defects are mainly embodied in the following aspects:

(1) the pistons are hermetically arranged in the cylinder bodies of the two half brakes, the braking effect is better when the pressure in the cylinder body is larger, but when the pressure in the cylinder body is overlarge, hydraulic oil in the cylinder body is easy to leak out of the cylinder body, so that the pollution to the working environment is caused, and the braking effect is reduced.

(2) Due to the weak links between adjacent cylinders, excessive pressure can cause the wall strength between the cylinders to be low.

(3) The piston is unreasonable in structural design, small in contact area with hydraulic oil and very low in working efficiency;

(4) although the stronger the overall structure, the better the application, the greater the overall strength, the greater the weight of the brake and the higher the manufacturing cost.

Disclosure of Invention

The utility model aims to provide a high-pressure yaw brake of a wind generating set, which has high overall strength and light weight, can effectively improve the wall strength between cylinder holes and the working efficiency of a piston, and thus improves the braking effect.

In order to solve the technical problem, the high-pressure yaw brake of the wind generating set comprises a mounting base, two half-and-half brakes and a brake disc, wherein the two half-and-half brakes are mounted on the mounting base, the brake disc is mounted between the two half-and-half brakes, the two half-and-half brakes are provided with a plurality of cylinder holes provided with pistons, the two half-and-half brakes are also provided with mounting grooves positioned on the side end faces of the cylinder holes, friction plates which are contacted with the end faces of the pistons and are attached to the brake disc are arranged in the mounting grooves, two sealing ring grooves are arranged in each cylinder hole, a sealing ring is arranged in each sealing ring groove of each cylinder hole, an oil through hole is arranged between the adjacent cylinder holes, and each half-and half brake is at least provided with an oil return hole communicated with the oil through hole.

The oil through hole is located between two sealing rings of each cylinder hole.

The oil through hole is arranged at a position below the transverse axis of the cylinder hole.

The oil through hole is of an arc-shaped structure.

A plurality of weight reduction grooves are arranged on the two half brakes.

The bottom surfaces of the two half brakes are provided with reinforcing ribs.

The two half brakes are fixedly arranged on the mounting base through connecting bolts.

The piston is provided with a groove.

The utility model has the advantages that:

(1) the direct oil through hole that is located between the two sealing washer that is provided with on adjacent cylinder hole and set up the oil return hole that link up with the oil through hole on each half-and-half stopper, thereby can utilize the pressure in the balanced each cylinder body of oil through hole to prevent effectively that hydraulic oil from leaking outside the cylinder body when cylinder body pressure is too big, thereby guaranteed operational environment's cleanness, still guaranteed sufficient pressure, improved braking effect greatly.

(2) Set up the oil through hole to the arc structure and with its setting in the horizontal axis below position of cylinder hole, its ingenious structural design has avoided the weak link and has effectively improved the intensity of wall between two cylinder holes.

(3) The piston is provided with the groove, so that the contact area between the piston and hydraulic oil is increased during working, and the working efficiency of the piston is effectively improved.

(4) The plurality of weight reduction grooves are arranged outside the cylinder body, so that the weight of the cylinder body is reduced and the manufacturing cost is reduced on the premise of meeting the structural strength;

(5) the bottom surface of the cylinder body is provided with the reinforcing rib, so that the self strength of the whole brake is effectively increased, and the unique personality of the appearance structure of the cylinder body is revealed.

Drawings

FIG. 1 is a schematic front view of a high-pressure yaw brake of a wind turbine generator system according to the present invention;

FIG. 2 is a schematic side view of a high-pressure yaw brake of a wind turbine generator system according to the present invention;

FIG. 3 is a schematic bottom view of the high-pressure yaw brake of the wind turbine generator system of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3;

FIG. 5 is a schematic perspective view of a half of the brake of the present invention;

FIG. 6 is a schematic cross-sectional view of a half of the brake of the present invention;

fig. 7 is a partial sectional view schematically showing the piston according to the present invention.

Detailed Description

The high-pressure yaw brake of the wind generating set is further described in detail with reference to the accompanying drawings and the specific embodiments.

As shown in the figure, the high-pressure yaw brake of the wind generating set comprises a mounting base 1, two half-and-half brakes 2 arranged on the mounting base and a brake disc 3 arranged between the two half-and-half brakes, wherein when the high-pressure yaw brake is mounted, the two half-and-half brakes 2 are fixedly arranged on the mounting base 1 through threaded connection by 12 connecting bolts 12, the two half-and-half brakes 3 are provided with three cylinder holes 4, each cylinder hole 4 is internally provided with a piston 13, the bottom of the piston is provided with a groove 14, when the piston works, the contact area between the piston and hydraulic oil is increased, the working efficiency of the piston is effectively improved, the two half-and-half brakes 3 are also provided with a mounting groove 5, the mounting groove 5 is positioned on the side end face of each cylinder hole, a friction plate 6 is arranged in the mounting groove 5, the friction plate 6 is in contact with the end face of the piston and is attached to the brake disc 3, and each cylinder hole 4 is internally provided with two ring grooves, sealing rings 7 are arranged in two sealing ring grooves of each cylinder hole 4, oil through holes 8 are formed between adjacent cylinder holes 4, each oil through hole 8 is of an arc-shaped structure and is arranged at a position below the transverse axis of each cylinder hole, namely, three cylinder holes are communicated with each other through the oil through holes of the arc-shaped structures, as can be seen from the figure, each oil through hole 8 is positioned between the two sealing rings of each cylinder hole 4, each half brake is respectively provided with an oil return hole 9 communicated with the oil through hole, and as can be seen from the figure, one cylinder hole in the middle of each half brake is respectively provided with an oil return hole 9.

Furthermore, a plurality of weight reduction grooves 10 are formed in the inner part and the back side of each of the two half-and-half brakes, reinforcing ribs 11 are arranged on the bottom surfaces of the two half-and-half brakes 2, small round corners are arranged on the reinforcing ribs, and the unique personality of the appearance structure of the cylinder body is revealed.

Through the structural design, the working pressure of the manufactured high-pressure yaw brake of the 120-cylinder-diameter wind generating set can reach 185bar, the friction coefficient is 0.45, the consistency of the interface and the existing product is ensured, the universality is good, and the weight of a single set of product is not more than 200kg while the structural strength is ensured.

Claims

1. The utility model provides a wind generating set high pressure yaw brake, includes mounting base (1), installs two half-and-half brakes (2) on mounting base and installs brake disc (3) between two half-and-half brakes, its characterized in that: two half stopper (2) have a plurality of cylinder holes (4) of settling the piston, two still be provided with on half stopper (2) and be located each settling groove (5) on the cylinder hole side end face, settle friction disc (6) of having the terminal surface contact with the piston and laminating with brake disc (3) in settling groove (5), each all be provided with twice sealing washer annular in cylinder hole (4), every sealing washer (7) have all been settled in the twice sealing washer annular of cylinder hole (4), be provided with between adjacent cylinder hole (4) and lead to oil hole (8), each be provided with one oil gallery (9) that link up with the oil hole on half stopper at least.

2. The wind turbine high pressure yaw brake of claim 1, wherein: the oil through hole (8) is located between two sealing rings of each cylinder hole (4).

3. The high-pressure yaw brake of the wind generating set according to claim 1 or 2, characterized in that: the oil through hole (8) is arranged at a position below the transverse axis of the cylinder hole.

4. The wind turbine high pressure yaw brake of claim 3, wherein: the oil through hole (8) is of an arc-shaped structure.

5. The wind turbine high pressure yaw brake of claim 1, 2 or 4, characterized in that: a plurality of lightening grooves (10) are arranged on the two half brakes.

6. The wind turbine high pressure yaw brake of claim 5, wherein: the bottom surfaces of the two half brakes (2) are provided with reinforcing ribs (11).

7. The wind turbine high pressure yaw brake of claim 1, 2, 4 or 6, wherein: the two half brakes (2) are fixedly arranged on the mounting base (1) through connecting bolts (12).

8. The wind turbine high pressure yaw brake of claim 7, wherein: the piston (13) is provided with a groove (14).