Dismounting tool for cylinder head of variable pitch cylinder

Abstract

The utility model relates to the technical field of wind power generation, in particular to a variable pitch cylinder head dismounting tool which comprises a connecting ring, a connecting rod and a connecting rod. Two protruding parts are formed on the inner side of the connecting ring, the positions, located on the protruding parts, of the connecting ring extend outwards to form extending plates, and a connecting piece connected with a cylinder head is arranged between the two extending plates. Wherein the connecting ring is connected with the cylinder head of the variable-pitch cylinder, at least one supporting leg is further installed on the outer side of the connecting ring, a force arm is connected in the supporting leg in a sliding mode, and a locking structure is arranged between the force arm and the supporting leg, the connecting ring is used for being connected with the cylinder head of the variable-pitch cylinder, and when a sealing ring in the variable-pitch cylinder needs to be replaced, the connecting ring is connected with the cylinder head of the variable-pitch cylinder. The cylinder head can be conveniently disassembled only by being connected with the tool, the problem that a metal component is damaged and deformed due to violent disassembly is greatly solved, meanwhile, the tool is simple in overall operation, the disassembly time of the cylinder head can be effectively shortened, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power generation technical field especially, relates to a kind of variable pitch cylinder cylinder head dismounting tool. BACKGROUND

[0002] With the development of renewable energy technology, wind turbine plays an increasingly important role in power generation. Among them, the variable pitch system is the core part of wind turbine, and the traditional hydraulic variable pitch system mainly includes three independent high-efficiency hydraulic drive variable pitch cylinders. By accurately controlling the extension and retraction of the cylinder piston rod, the blade is driven to rotate to realize variable pitch.

[0003] However, the application of the existing hydraulic variable pitch system in the wind turbine also has certain technical challenges. Since the sealing element of the variable pitch cylinder is prone to aging, cracking and oil leakage due to high temperature, it threatens the normal operation of the wind turbine, so it is necessary to dismount the variable pitch cylinder and replace the sealing ring.

[0004] When replacing the sealing ring of the variable pitch cylinder, the cylinder head needs to be opened first. However, the cylinder head usually lacks special tools, resulting in low work efficiency. Secondly, improper tools or excessive force are extremely likely to cause plastic deformation of metal components, which may damage the internal structure. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the shortcomings of lacking special tools for cylinder head in the prior art, resulting in low work efficiency, and proposes a variable pitch cylinder cylinder head dismounting tool.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A variable pitch cylinder cylinder head dismounting tool is designed, which comprises:

[0008] A connecting ring for sleeving outside the cylinder head;

[0009] Two protruding parts are formed on the inner side of the connecting ring, and the connecting ring extends outward at the protruding parts with an extension plate. A connecting piece for connecting the cylinder head is arranged between the two extension plates.

[0010] At least one foot is installed on the outer side of the connecting ring, and a force arm is slidably connected in the foot. A locking structure is arranged between the force arm and the foot.

[0011] Further, the connecting piece comprises at least one screw rod penetrating between the two extension plates, and a nut is threadedly connected to the tail end of the screw rod.

[0012] Further, the end face of the extension plate close to the head end of the screw rod is provided with a clamping groove, and the head end of the screw rod is sunk into the clamping groove to lock the screw rod in the circumferential direction.

[0013] Further, the force arm comprises a rod end and a fixing base connected to the end of the rod end, and a hole position is formed in the end face of the supporting leg, and the rod end is inserted into the hole position.

[0014] The locking structure is mounted on the rod end.

[0015] Further, the locking structure comprises a mounting hole formed in the radial direction on the rod end, a locking rod is movably inserted into the mounting hole, a cover is threadedly connected to the top end of the mounting hole, and a spring is mounted between the cover and the locking rod.

[0016] Further, the end of the locking rod is inwardly recessed to form a pressing end, a sliding groove is formed in the bottom of the supporting leg and communicated with the hole position, and the pressing end is slid in the sliding groove.

[0017] A plurality of clamping grooves are formed in the middle of the sliding groove, and the bottom end of the locking rod is clamped in the clamping groove.

[0018] Further, the front end of the fixing base is provided with an insertion hole, the rod end is inserted into the insertion hole, and a connecting hole for clamping the locking rod is further formed in the side face of the fixing base.

[0019] The utility model provides a kind of variable pitch cylinder cylinder head dismounting tool, and beneficial effect lies in: in the utility model, the cylinder head of variable pitch cylinder is connected by the design of connecting ring, when needing to replace the sealing ring inside variable pitch cylinder, just need to connect the tool to realize the convenient dismounting of cylinder head, greatly avoid the problem that metal component is damaged and deformed due to violent dismounting, while the tool is overall simple to operate, can effectively shorten the dismounting time of cylinder head, improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of prior art variable pitch cylinder;

[0021] Figure 2 It is a perspective view of the utility model;

[0022] Figure 3 It is a top view of the utility model;

[0023] Figure 4 It is a structural schematic view of locking structure of the utility model;

[0024] Figure 5 It is a structural schematic view of force arm of the utility model;

[0025] Figure 6 Two force arm assembly structure schematic view of the utility model.

[0026] In the drawing: 1, connecting ring; 11, convex part; 12, extension plate; 13, locking groove; 2, connecting piece; 21, screw rod; 22, nut; 3, supporting leg; 31, sliding groove; 32, clamping groove; 4, force arm; 41, rod end; 42, fixing base; 43, insertion hole; 44, connecting hole; 5, locking structure; 51, mounting hole; 52, locking rod; 521, pressing end; 53, cover; 54, spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0028] REFERENCE Figures 2-6 For an embodiment of the utility model, specifically, it discloses a variable pitch cylinder head dismounting tool, which comprises a connecting ring 1 for being sleeved on the outside of the cylinder head, as shown in the drawing, Figure 1 The variable pitch cylinder comprises a cylinder body and a cylinder head connected to the right end of the cylinder body, and two plane parts are arranged on the outside of the cylinder head, and a through hole is arranged between the two plane parts, that is, the connecting ring 1 in the embodiment is in a ring structure; two convex parts 11 are formed on the inside of the connecting ring 1, and the connecting ring 1 is outwardly extended with an extension plate 12 at the convex part 11, and a connecting piece 2 for connecting the cylinder head is arranged between the two extension plates 12;

[0029] Specifically, in the embodiment, two extension plates 12 are adopted to be used for being clamped and connected on the two plane parts of the cylinder head when the connecting ring 1 is connected to the cylinder head, so that the circumferential locking and fixing of the connecting ring 1 and the cylinder head can be realized, and in addition, after being connected and fixed by the connecting piece 2, the connection stability between the two can be greatly improved, so that when the connecting ring 1 is controlled to rotate, the cylinder head can be driven to rotate to realize the dismounting with the cylinder body.

[0030] At least one supporting leg 3 is further arranged on the outside of the connecting ring 1, a force arm 4 is slidingly connected in the supporting leg 3, and a locking structure 5 is arranged between the force arm 4 and the supporting leg 3, and in the embodiment, the supporting leg 3 is used for facilitating the rotation control of the connecting ring 1, and the force arm 4 with adjustable length is further designed, and the length of the force arm 4 is adjusted to save the rotary driving force of the supporting leg 3.

[0031] In some embodiments, the connector 2 of this utility model includes at least one screw 21 passing between two extension plates 12. The tail end of the screw 21 is threaded with a nut 22. Preferably, in this embodiment, there are two screws 21. The two screws 21 pass through two mounting holes on the cylinder head plane in sequence. After being fixed by the nut, the connection and fixation between the connecting ring 1 and the cylinder head is completed.

[0032] Furthermore, to prevent the screw 21 from rotating circumferentially during fixing, the end face of the extension plate 12 near the head end of the screw 21 in this invention has a locking groove 13. The head end of the screw 21 is recessed into the locking groove 13 to lock the screw 21 circumferentially. Of course, the locking groove 13 in this embodiment is set as a polygonal structure. For example, when the head end of the screw 21 is a hexagonal structure, the locking groove 13 should also be set as a hexagonal structure. The two are engaged to avoid the circumferential locking of the screw 21 and improve the convenience of connection.

[0033] Furthermore, the lever arm 4 includes a rod end 41 and a fixed seat 42 connected to the end of the rod end 41. A hole is provided on the end face of the support leg 3, and the rod end 41 is inserted into the hole.

[0034] The locking structure 5 is installed on the rod end 41.

[0035] Based on the above embodiments, the locking structure 5 in this embodiment includes a mounting hole 51 opened in the radial direction on the rod end 41, a locking rod 52 is movably inserted into the mounting hole 51, a cover 53 is threaded to the top of the mounting hole 51, and a spring 54 is installed between the cover 53 and the locking rod 52.

[0036] It should be noted that, in this embodiment, the mounting hole 51 is a stepped hole, and the top end of the locking rod 52 has an outwardly flared portion. This outwardly flared portion is used to stop the stepped surface of the stepped hole to prevent it from falling out of the bottom of the mounting hole 51. During assembly, the locking rod 52 and the spring 54 are first inserted into the mounting hole 51 in sequence. Then, the stop cover 53 is connected by threads to seal the top end of the mounting hole 51. At this point, the locking rod 52 can extend and retract within the mounting hole 51.

[0037] Preferably, in this embodiment, the end of the locking rod 52 is recessed to form a pressing end 521, and a groove 31 communicating with the hole is provided at the bottom of the support leg 3, and the pressing end 521 slides in the groove 31.

[0038] The slide groove 31 is provided with a plurality of slots 32 spaced apart, and the bottom end of the locking rod 52 is engaged in the slots 32.

[0039] It should be noted that the width of the sliding groove 31 is less than the diameter of the clamping groove 32, the pressing end 521 is matched with the sliding groove 31, and the part with a larger diameter at the bottom of the locking rod 52 is clamped with the clamping groove 32. When the extension length of the entire force arm 4 needs to be adjusted, the pressing end 521 can be pressed, at which time the locking rod 52 is retracted and separated from the clamping groove 32, and at this time the force arm 4 can be freely slid. When the length position is adjusted to the required length position, the locking rod 52 is pressed, at which time the locking rod 52 is ejected under the action of the spring 54 until the part with a larger diameter is clamped in the current clamping groove 32, so as to fix the position of the force arm 4. In addition, when the pressing end 521 is further pressed to be completely retracted, the rod end 41 can be taken out from the inside of the support 3.

[0040] Of course, considering the assembly of multiple force arms 4 to further improve the extension length of the force arm 4, the front end of the fixed seat 42 is provided with a insertion hole 43, the rod end 41 is inserted into the insertion hole 43, and a connecting hole 44 for clamping the locking rod 52 is further provided on the side surface of the fixed seat 42.

[0041] That is, when the length of the force arm 4 needs to be further increased, another force arm 4 can be taken down, the rod end 41 is inserted into the insertion hole 43 of the fixed seat 42, and the locking rod 52 is clamped with the connecting hole 44 on the fixed seat 42 to complete the extension connection of the force arm 4, and further improve the convenience of driving the connecting ring 1.

[0042] In summary, the utility model discloses a connecting ring 1 for connecting the cylinder head of a variable pitch cylinder. When the sealing ring inside the variable pitch cylinder needs to be replaced, the tool can be connected to conveniently disassemble the cylinder head, greatly avoiding the problem of metal component damage and deformation caused by violent disassembly. The tool is simple to operate, can effectively shorten the disassembly time of the cylinder head, and improves work efficiency.

[0043] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A tool for disassembling a pitch cylinder head, characterized in that, include: (1) is a connecting ring that is fitted onto the outside of the cylinder head; The inner side of the connecting ring (1) has two protrusions (11), and the connecting ring (1) extends outward from the protrusions (11) with an extension plate (12), and a connecting member (2) for connecting the cylinder head is provided between the two extension plates (12). At least one support leg (3) is installed on the outside of the connecting ring (1), and a force arm (4) is slidably connected in the support leg (3). A locking structure (5) is provided between the force arm (4) and the support leg (3).

2. The pitch cylinder head disassembly tool according to claim 1, characterized in that: The connector (2) includes at least one screw (21) passing between the two extension plates (12), the tail end of which is threaded with a nut (22).

3. The pitch cylinder head disassembly tool according to claim 2, characterized in that: The end face of the extension plate (12) near the head end of the screw (21) has a locking groove (13), and the head end of the screw (21) is recessed into the locking groove (13) to lock the screw (21) circumferentially.

4. The pitch cylinder head disassembly tool according to claim 1, characterized in that: The lever arm (4) includes a rod end (41) and a fixed seat (42) connected to the end of the rod end (41). A hole is provided on the end face of the support leg (3), and the rod end (41) is inserted into the hole. The locking structure (5) is installed on the rod end (41).

5. A pitch cylinder head disassembly tool according to claim 4, characterized in that: The locking structure (5) includes a mounting hole (51) formed radially on the rod end (41), a locking rod (52) is movably inserted into the mounting hole (51), a cover (53) is threaded to the top of the mounting hole (51), and a spring (54) is installed between the cover (53) and the locking rod (52).

6. A pitch cylinder head disassembly tool according to claim 5, characterized in that: The end of the locking rod (52) is recessed to form a pressing end (521), and a groove (31) communicating with the hole is provided at the bottom of the support leg (3). The pressing end (521) slides in the groove (31). The slide groove (31) is provided with a plurality of slots (32) spaced apart, and the bottom end of the locking rod (52) is engaged in the slots (32).

7. A pitch cylinder head disassembly tool according to claim 5, characterized in that: The front end of the fixing base (42) is provided with an insertion hole (43), and the rod end (41) is inserted into the insertion hole (43). The side of the fixing base (42) is also provided with a connection hole (44) that engages with the locking rod (52).

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