Tool for replacing sealing element of variable pitch cylinder of fan

Abstract

The utility model belongs to the technical field of fan variable pitch cylinder maintenance, and particularly relates to a fan variable pitch cylinder sealing element replacement tool which comprises a rod body connecting piece capable of being assembled on a piston rod, two moving wheels are rotationally connected to the lower side of the rod body connecting piece, and two first electric push rods are fixedly connected to the lower side of the rod body connecting piece. The output ends, located on the lower sides, of the two first electric push rods are fixedly connected with wheel shells, rotating rods are fixedly connected to the axes of the moving wheels and rotationally connected to the wheel shells, rotating driving pieces are fixedly connected to the wheel shells, and the output ends of the rotating driving pieces are fixedly connected with the rotating rods. The lower side of the rod body connecting piece is fixedly connected with a second electric push rod located between the two first electric push rods, and the output end, located on the lower side, of the second electric push rod is fixedly connected with an anti-skid positioning plate. According to the utility model, the gravity of the piston rod borne by a maintainer during replacement of the fan variable-pitch cylinder sealing element can be reduced, and the difficulty in replacement of the fan variable-pitch cylinder sealing element is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the fan variable pitch cylinder maintenance technical field, specifically relates to a kind of fan variable pitch cylinder sealing element replacement tool. BACKGROUND

[0002] Variable pitch system is important component of wind turbine generator unit. Existing mainstream fan variable pitch control is generally divided into hydraulic variable pitch and electric variable pitch two modes;Hydraulic variable pitch system is widely applied due to dynamic response good, torque, mature technology and other advantages.

[0003] Variable pitch cylinder is important execution unit of fan hydraulic variable pitch system, variable pitch cylinder drives the variable pitch bearing of blade to rotate to realize the purpose of adjusting blade angle, but with fan equipment operation, hydraulic oil leakage fault caused by variable pitch cylinder sealing element aging and other reasons increasingly frequent, variable pitch cylinder sealing element is damaged if not timely replacement, with "sick" operation will cause equipment further damage and hydraulic oil leakage, even there is unpredictable safety risk, so variable pitch cylinder sealing element needs to be replaced in time.

[0004] But the weight of variable pitch cylinder is large, not easy to carry in cabin, hub, leading to the difficulty of fan variable pitch cylinder sealing element replacement, for this purpose, we propose a kind of fan variable pitch cylinder sealing element replacement tool, reduce the difficulty of fan variable pitch cylinder sealing element replacement. CONTENT OF THE INVENTION

[0005] The utility model aims at providing a kind of fan variable pitch cylinder sealing element replacement tool, can reduce the piston rod gravity that maintenance personnel replaces fan variable pitch cylinder sealing element, reduce the difficulty of fan variable pitch cylinder sealing element replacement.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] A kind of fan variable pitch cylinder sealing element replacement tool, including the rod body connecting piece that can be assembled on piston rod, the lower side of the rod body connecting piece is rotatably connected with two moving wheels.

[0008] Further, the lower side of the rod body connecting piece is fixedly connected with two first electric push rods, and the output end of the two first electric push rods located lower side is fixedly connected with wheel housing, the axle of the moving wheel is fixedly connected with rotating rod, and the rotating rod is rotatably connected on wheel housing.

[0009] Further, the wheel housing is fixedly connected with rotating drive, and the output end of the rotating drive is fixedly connected with rotating rod.

[0010] Further, the lower side of the rod body connecting piece is fixedly connected with the second electric push rod between the two first electric push rods, and the output end of the second electric push rod located lower side is fixedly connected with anti-skid positioning plate.

[0011] Further, the rod body connector comprises a lower connecting seat, the first electric push rod and the second electric push rod are fixedly connected to the lower side of the lower connecting seat, and a locking rope is installed on the lower connecting seat.

[0012] Further, one end of the lower connecting seat is fixedly connected with a winding device, one end of the locking rope is installed on the winding device, the end of the locking rope away from the winding device is fixedly connected with a locking rod, and the end of the lower connecting seat away from the winding device is fixedly connected with a pull hook.

[0013] The utility model achieves the following technical effects:

[0014] The movable moving wheel and the lower connecting seat of the fan variable pitch cylinder sealing element replacement tool can bear the gravity of the piston rod, can reduce the gravity of the piston rod borne by the maintenance personnel when the fan variable pitch cylinder sealing element is replaced, and can reduce the difficulty of replacing the fan variable pitch cylinder sealing element. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the structure schematic view when the utility model is used;

[0016] Figure 2 is the structure side view when the utility model is used;

[0017] Figure 3 is the partial enlarged view of the utility model;

[0018] Figure 4 is the partial enlarged view of the rod body connector of the utility model.

[0019] In the drawings, the components represented by each reference numeral are listed as follows:

[0020] 1, slurry shell body; 2, piston rod; 3, lower connecting seat; 4, winding device; 5, locking rope; 6, pull hook; 7, locking rod; 8, first electric push rod; 9, wheel shell; 10, moving wheel; 11, rotary driving part; 12, second electric push rod; 13, anti-skid positioning plate. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the utility model more clear and obvious, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model.

[0022] As Figures 1-2As shown, a wind turbine variable pitch cylinder sealing element replacement tool includes a rod body connector for assembling on the piston rod 2, the lower side of the rod body connector is rotatably connected with two moving wheels 10, at this time, when replacing the variable pitch cylinder sealing element, the rod body connector and the piston rod 2 are connected, and the two moving wheels 10 are in contact with the wheel hub ground, until two replacement tools are installed on the outer side of the piston rod 2, the piston rod 2 is moved when the wind turbine variable pitch cylinder sealing element is replaced, when the piston rod 2 moves, the movable moving wheel 10 and the lower connecting seat 3 bear the gravity of the piston rod 2, which can reduce the gravity of the piston rod 2 borne by the maintenance personnel when replacing the wind turbine variable pitch cylinder sealing element, reduce the difficulty of replacing the wind turbine variable pitch cylinder sealing element, and mechanically support the piston rod 2, reduce the risk of mechanical injury caused by the piston rod 2 falling due to human operation error during movement, and improve safety.

[0023] As shown in the figure, Figures 3-4 The lower side of the rod body connector is fixedly connected with two first electric push rods 8, the model of the first electric push rod 8 is preferably LA36, the output end of the two first electric push rods 8 located on the lower side is fixedly connected with a wheel shell 9, the wheel shell 9 can be a shell with an opening on the lower side, the shaft center of the moving wheel 10 is fixedly connected with a rotating rod, the rotating rod is rotatably connected on the wheel shell 9, the lower part of the moving wheel 10 extends to the lower side of the shell through the opening on the lower side of the shell, at this time, the interval between the moving wheel 10 and the lower connecting seat 3 can be adjusted by starting the first electric push rod 8, so as to adapt to the height difference between the piston rod 2 and the wheel hub ground.

[0024] At the same time, the wheel shell 9 is fixedly connected with a rotary driving member 11, which can be a servo motor, the model of which can be MPP0922C1E-NPSB, or a combination of an electric push rod, a rack and a gear, the output end of the rotary driving member 11 is fixedly connected with the rotating rod, so as to drive the moving wheel 10 to rotate, when the maintenance personnel moves the piston rod 2 to apply auxiliary thrust to the piston rod 2, further reducing the force required by the maintenance personnel during maintenance, reducing the difficulty of work, and reducing the working intensity.

[0025] A reinforcing structure can be provided between the first electric push rod 8 and the rod body connector to improve the connection stability between the first electric push rod 8 and the rod body connector.

[0026] As shown in the figure, Figures 2-3 The lower side of the rod body connector is fixedly connected with a second electric push rod 12 between the two first electric push rods 8, the model of the second electric push rod 12 is also preferably LA36, the output end of the second electric push rod 12 on the lower side is fixedly connected with an anti-skid positioning plate 13, the anti-skid positioning plate 13 includes a metal support plate fixedly connected on the output end of the second electric push rod 12, and the lower side of the metal support plate is provided with anti-skid pieces made of anti-skid rubber or cork;

[0027] At this time, the anti-slip positioning plate 13 is moved down by the second electric push rod 12, so that the anti-slip positioning plate 13 and the wheel hub ground are in contact, which increases the friction and reduces the phenomenon of accidental slippage of the piston rod 2 after removal, thereby reducing the risk of mechanical injury caused by accidental slippage of the piston rod 2.

[0028] like Figures 1-3 As shown, the rod connector includes a lower connecting seat 3, which is an arc-shaped plate. The first electric push rod 8 and the second electric push rod 12 are both fixedly connected to the lower side of the lower connecting seat 3. A locking rope 5 is installed on the lower connecting seat 3. At this time, the rod connector can be quickly installed on the outside of the piston rod 2 by the cooperation of the locking rope 5 and the lower connecting seat 3.

[0029] Furthermore, the locking rope 5 can be installed by fixing a winder 4 to one end of the lower connecting seat 3, with one end of the locking rope 5 mounted on the winder 4. The winder 4 can wind or unwind the locking rope 5 and lock it. A round rod-shaped locking rod 7 is fixedly connected to the end of the locking rope 5 away from the winder 4, and a hook 6 is fixedly connected to the end of the lower connecting seat 3 away from the winder 4. When the locking rod 7 is hooked onto the hook 6 and locked, the winder 4 can be activated to wind the locking rope 5 to quickly lock it, making it convenient to use.

[0030] Here, the winding device 4 includes a hollow housing, on which a circular roller is rotatably connected. One end of the locking rope 5 is wound around the outside of the circular roller, and the housing has an opening through which the locking rope 5 extends out. A stepper motor with a self-locking function, namely a NEMA 23 self-locking stepper motor, is fixedly connected to the housing, and the output end of the stepper motor is fixedly connected to the circular roller.

[0031] Similarly, the rod connector can also be a clamp, fixture, or other device that can be fixed to the outside of the piston rod 2.

[0032] Here, the power supply for the winder 4, the first electric push rod 8, the rotary drive 11, and the second electric push rod 12 can be a battery module installed on the lower connecting seat 3, or it can be a power supply from the fan.

[0033] Meanwhile, the first electric actuator 8 and the second electric actuator 12 can be fixedly connected to the outside of the connecting seat 3 by means of threaded connection or snap-fit, so that the tool can be separated into multiple components and transported to the inside of the wheel hub, reducing the difficulty of movement.

[0034] The working principle of the utility model is: moving the tool to the inside of the hub, disassembling the end cover of the fan variable pitch cylinder, then placing the lower connecting seat 3 of the two tools in turn under the piston rod 2, locking the position of the lower connecting seat 3 through the locking rope 5, then starting the first electric push rod 8 to drive the moving wheel 10 to move until the moving wheel 10 and the ground of the hub abut;

[0035] Then starting the rotating driving part 11 to drive the moving wheel 10 to rotate, assisting the maintenance personnel to pull out the piston rod 2 from the inside of the slurry lever shell 1, and the sealing element can be replaced.

[0036] In summary, the movable moving wheel 10 and the lower connecting seat 3 bear the gravity of the piston rod 2, which can reduce the gravity of the piston rod 2 borne by the maintenance personnel when replacing the sealing element of the fan variable pitch cylinder, reduce the difficulty of replacing the sealing element of the fan variable pitch cylinder, and support the piston rod 2 mechanically, reduce the risk of mechanical injury caused by the piston rod 2 falling due to human operation error in the moving process of the piston rod 2, and improve the safety.

[0037] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled personnel in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, which should be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A tool for replacing the seal of a wind turbine pitch cylinder, characterized in that: Includes a rod connector that can be mounted on the piston rod (2), and two movable wheels (10) are rotatably connected to the lower side of the rod connector. Two first electric actuators (8) are fixedly connected to the lower side of the rod connector. The output ends of the two first electric actuators (8) are fixedly connected to wheel housings (9). A rotating rod is fixedly connected to the axis of the moving wheel (10). The rotating rod is rotatably connected to the wheel housing (9).

2. The wind turbine pitch cylinder seal replacement tool according to claim 1, characterized in that: A rotary drive component (11) is fixedly connected to the wheel housing (9), and the output end of the rotary drive component (11) is fixedly connected to the rotating rod.

3. The wind turbine pitch cylinder seal replacement tool according to claim 1, characterized in that: The lower side of the rod connector is fixedly connected to a second electric actuator (12) located between two first electric actuators (8), and an anti-slip positioning plate (13) is fixedly connected to the lower output end of the second electric actuator (12).

4. The wind turbine pitch cylinder seal replacement tool according to claim 3, characterized in that: The rod connector includes a lower connector (3), and the first electric actuator (8) and the second electric actuator (12) are both fixedly connected to the lower side of the lower connector (3). A locking rope (5) is installed on the lower connector (3).

5. A tool for replacing the seal of a wind turbine pitch cylinder according to claim 4, characterized in that: One end of the lower connecting seat (3) is fixedly connected to a winder (4), one end of the locking rope (5) is installed on the winder (4), the end of the locking rope (5) away from the winder (4) is fixedly connected to a locking rod (7), and the end of the lower connecting seat (3) away from the winder (4) is fixedly connected to a hook (6).

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