Split type yaw caliper piston and yaw caliper

Abstract

The piston comprises an alloy ring and a supporting structure, the alloy ring comprises a thick-wall ring section and a thin-wall ring section, a supporting platform is formed in the alloy ring at the junction of the thick-wall ring section and the thin-wall ring section, the supporting structure is a combined column body, the combined column body comprises a supporting end and a column end, and the supporting end is connected with the column end. The radius difference between the supporting end and the column end is larger than or equal to the width of the supporting platform, the diameter of the supporting end is equal to the inner diameter of the thin-wall ring section, the column end of the supporting structure enters the thick-wall ring section, the supporting end of the supporting structure is lapped on the supporting platform, and the supporting structure is fixedly connected with the alloy ring. The surface of the supporting end of the supporting structure is provided with a friction plate protruding out of the alloy ring thin-wall ring section. Compared with the prior art, the utility model has the advantages of high material utilization rate, low process cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, and in particular to a split yaw caliper piston and a yaw caliper. Background Art

[0002] The yaw caliper of a wind turbine, as an important part of a wind power generation system, its main function is to enable the wind turbine to rotate smoothly and accurately to a predetermined position through braking when the wind turbine needs to yaw and face the wind, and to maintain a stable state after facing the wind, ensuring the safe and stable operation of the unit. Among them, the braking effect is mainly that the piston controls the braking force of the yaw caliper through the friction plate under the action of oil pressure or mechanical disc springs. Therefore, the yaw caliper of a wind turbine needs to be regularly maintained and the piston needs to be replaced.

[0003] In the prior art, the piston is an integral piston with a copper cup structure. Its main manufacturing processes are: (1) Extruding or continuous casting of copper rods for processing. The advantage is that the material structure is uniform and the performance is stable, but the material utilization rate is very low. (2) Casting the main structure and then forming by forging. However, due to many defects in the one-time casting of thin walls, secondary forging is required, and the process cost is still relatively high.

[0004] Therefore, it is necessary to develop a split piston with high material utilization rate and low process cost. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a split yaw caliper piston and a yaw caliper to overcome the defects existing in the above-mentioned prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A split yaw caliper piston includes an alloy ring and a support structure. The alloy ring includes a thick-walled ring section and a thin-walled ring section. The junction of the thick-walled ring section and the thin-walled ring section forms a support platform inside the alloy ring. The support structure is a combined cylinder, which includes a support end and a column end. The radius difference between the support end and the column end is greater than or equal to the width of the support platform, and the diameter of the support end is equal to the inner diameter of the thin-walled ring section of the alloy ring. The column end of the support structure enters the inside of the thick-walled ring section, the support end of the support structure is placed on the support platform, the support structure and the alloy ring are fixedly connected, and a friction plate protruding from the thin-walled ring section of the alloy ring is provided on the surface of the support end of the support structure.

[0008] Furthermore, the support structure and the alloy ring are connected by an interference fit.

[0009] Further, the thick-walled ring section of the alloy ring and the column end of the support structure are provided with mutually engaging threads. A side wall opening is provided in the intersection area between the thick-walled ring section of the alloy ring and the column end of the support structure. The side wall opening is used for passing a set screw. After the alloy ring and the support structure are engaged through the threads, the set screw is tightened to fix the support structure and the alloy ring.

[0010] Further, the support structure and the alloy ring are connected by welding, and the welding point is located between the support structure and the inner side of the thin-walled ring section.

[0011] Further, the material of the support structure is carbon steel.

[0012] Further, the material of the alloy ring is copper alloy.

[0013] Further, a through hole is provided at the center of the support structure. The through hole is composed of two cylindrical spaces with different radii. The side with the larger radius is located at the column end of the support structure, and the side with the smaller radius is located at the support end of the support structure.

[0014] In the second aspect of the present invention, a yaw caliper is characterized by comprising an assembly, an adjusting bolt, a piston, and a yaw gear ring. The piston is installed on the assembly through the adjusting bolt. The piston contacts the yaw gear ring through a friction plate. The piston is a split yaw caliper piston as described in any one of the above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The split yaw caliper piston proposed by the present invention separates the piston support structure and the alloy ring through a separation design. According to the different functions played by different parts of the yaw caliper piston during the operation of the wind power generator, a separation design is carried out. This split piston design can avoid casting a large number of thin walls and complex structures at one time during processing, reducing the amount of machining.

[0017] 2) In practical applications, the functions and reliability requirements for the alloy ring and the support structure of the piston are different. Different materials are cast separately to reduce the use of precious materials, and ultimately reduce the cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the piston structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the piston connection method of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the yaw caliper.

[0021] Description of the markings in the figure: 1. Alloy ring, 2. Support structure, 3. Friction plate, 4. Steel back structure, 5. Assembly, 6. Adjusting bolt. Specific implementation mode

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation mode and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0023] Embodiment 1

[0024] The present invention relates to a split yaw caliper piston. As Figure 1 shown, it includes an alloy ring 1 and a support structure 2. The alloy ring 1 includes a thick-walled ring section and a thin-walled ring section. The junction of the thick-walled ring section and the thin-walled ring section forms a support platform inside the alloy ring 1. The support structure 2 is a combined cylinder, and the combined cylinder includes a support end and a column end. The radius difference between the support end and the column end is greater than or equal to the width of the support platform, and the diameter of the support end is equal to the inner diameter of the thin-walled ring section. The column end of the support structure 2 enters the inside of the thick-walled ring section, the support end of the support structure 2 is placed on the support platform, the support structure 2 and the alloy ring 1 are fixedly connected, and a friction plate 3 protruding from the thin-walled ring section of the alloy ring 1 is provided on the surface of the support end of the support structure 2.

[0025] Preferably, a steel back structure 4 is further provided between the friction plate 3 and the support end of the support structure 2 for fixing the friction plate 3.

[0026] In the present invention, the alloy ring 1 of the piston is made of copper alloy because copper alloy has high strength, self-lubricity, high wear resistance, and does not damage the yaw bearing. The support structure 2 inside the piston only needs to provide compression force transmission and only needs to ensure strength. If copper alloy is still used, it will cause high material cost, and the internal cavity of the piston is large, and the machining volume of hollowing out is very large, resulting in waste of copper alloy materials. To avoid waste, the support structure 2 is made of carbon steel, reducing the amount of alloy materials used and thus reducing the total material cost, and at the same time reducing the machining of the piston cavity and thus reducing the machining cost of the product.

[0027] As Figure 2 shown, the alloy ring and the support structure of the present invention can be assembled in the following three ways.

[0028] 1. As in the (1) part of Figure 2 , an interference fit connection is adopted, including installation methods such as hot interference fit, cold interference fit, and press interference fit.

[0029] 2. As in Figure 2For part (2), a threaded connection is adopted. Threads that engage with each other are provided on the thick-walled ring section of the alloy ring 1 and the column end of the support structure 2. Side wall openings are provided in the intersection area between the thick-walled ring section of the alloy ring 1 and the column end of the support structure 2. The side wall openings are used to pass through set screws. After the alloy ring 1 and the support structure 2 are engaged by threads, the set screws are tightened to fix the support structure 2 and the alloy ring 1.

[0030] 3. As for Figure 2 part (3), a welding method is used for connection.

[0031] Preferably, a through hole is provided at the center of the support structure. The through hole is composed of two cylindrical spaces with different radii. The side with the larger radius is located at the column end of the support structure, and the side with the smaller radius is located at the support end of the support structure. The through hole can be used to install a disc spring for controlling the piston.

[0032] Embodiment 2

[0033] The present utility model provides a specific application of the split yaw caliper piston. As Figure 3 shown, a yaw caliper includes an assembly 5, an adjusting bolt 6, a piston, and a yaw gear ring (not marked in the figure). The piston is installed on the assembly 5 through the adjusting bolt 6. The piston contacts the yaw gear ring through a friction plate 3. The piston is a split yaw caliper piston as described in any one of Embodiment 1.

[0034] The piston with the friction plate 3 is installed inside the assembly 5. The friction plate faces the side of the yaw gear ring. The caliper applies a positive pressure to the piston through the adjusting bolt. The piston can move freely up and down inside the caliper body. The yaw gear ring is relatively stationary. During the yaw process of the wind turbine, there is relative movement between the friction plate and the yaw gear ring, which plays the role of a sliding bearing.

[0035] The piston (including the friction plate) is a main spare part of the yaw caliper of the wind turbine as a consumable, and generally needs to be replaced once every 3 years. The split piston of the present utility model can greatly reduce the spare part cost of the caliper after being applied to the yaw caliper, and meet the functional requirements of the yaw caliper structure.

[0036] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present utility model without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present application based on the concept of the present utility model through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A split yaw caliper piston, characterized in that, It includes an alloy ring (1) and a support structure (2). The alloy ring (1) includes a thick-walled ring section and a thin-walled ring section. The junction of the thick-walled ring section and the thin-walled ring section forms a support platform inside the alloy ring (1). The support structure (2) is a combined cylinder, which includes a support end and a column end. The radius difference between the support end and the column end is greater than or equal to the width of the support platform, and the diameter of the support end is equal to the inner diameter of the thin-walled ring section. The column end of the support structure (2) enters the inside of the thick-walled ring section, the support end of the support structure (2) is placed on the support platform, the support structure (2) and the alloy ring (1) are fixedly connected, and a friction plate (3) protruding from the thin-walled ring section of the alloy ring (1) is provided on the surface of the support end of the support structure (2).

2. The split yaw caliper piston according to claim 1, wherein The support structure (2) and the alloy ring (1) are connected by an interference fit method.

3. A split yaw caliper piston according to claim 1, characterized in that, Threads that engage with each other are provided on the thick-walled ring section of the alloy ring (1) and the column end of the support structure (2). Side wall openings are provided in the intersection area between the thick-walled ring section of the alloy ring (1) and the column end of the support structure (2). The side wall openings are used to pass through set screws. After the alloy ring (1) and the support structure (2) are engaged by the threads, the set screws are tightened to fix the support structure (2) and the alloy ring (1).

4. A split yaw caliper piston according to claim 1, wherein, The support structure (2) and the alloy ring (1) are connected by welding, and the welding points are located between the support structure (2) and the inner side of the thin-walled ring section.

5. A split yaw caliper piston according to claim 1, wherein, The material of the support structure (2) is carbon steel.

6. A split yaw caliper piston according to claim 1, wherein, The material of the alloy ring (1) is copper alloy.

7. The split yaw caliper piston according to claim 1, characterized in that, A through hole is provided at the center of the support structure (2). The through hole consists of two cylindrical spaces with different radii. The side with the larger radius is located at the column end of the support structure (2), and the side with the smaller radius is located at the support end of the support structure (2).

8. A yaw caliper, characterized in that, It includes an assembly (5), an adjusting bolt (6), a piston, and a yaw ring gear. The piston is installed on the assembly through the adjusting bolt. The piston contacts the yaw ring gear through the friction plate (3). The piston is a split yaw caliper piston as described in any one of claims 1-7.

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