Connecting and fixing device for rotary transmitter and variable-pitch motor

Abstract

The utility model belongs to the technical field of wind driven generators, and particularly relates to a connecting and fixing device applied to a special rotary transmitter and a variable pitch motor. The longitudinal section of the coupling structural member is in a convex shape, the outer side of one end of the coupling structural member is sleeved with a fixing device, the coupling structural member is connected with a variable pitch motor transmission shaft and a rotary transmitter rotor through the fixing device, and a sealing piece is arranged between the coupling structural member and the fixing device; according to the utility model, the longitudinal section of the coupling structural member is convex, the outer side of one end of the coupling structural member is sleeved with a fixing device, the coupling structural member is respectively connected with a variable pitch motor transmission shaft and a rotary transmitter rotor through the fixing device, a sealing member is arranged between the coupling structural member and the fixing device, and the sealing member is used for sealing the variable pitch motor transmission shaft and the rotary transmitter rotor. And a sealing piece is arranged between the coupling structural piece and the fixing device, so that the connection between the coupling structural piece and the rotary transmitter cannot be abraded or jammed.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, and in particular relates to a coupling device for a dedicated rotary transmitter and a pitch motor. Background Technology

[0002] The rotary transmitter is installed at the tail of the pitch motor and connected to the pitch motor drive shaft. Currently, a bearing connection is used, and the bearing is secured with an end cap on the outside.

[0003] During wind turbine operation, wind speed constantly changes, causing the pitch system to continuously adjust its pitch, resulting in frequent operation of the pitch motor. Analysis of pitch system failures in recent years has revealed a high failure rate in the rotary transmitter of the pitch motor. Disassembly revealed wear or jamming in the rotary transmitter's connecting bearings, leading to data errors in the pitch system and ultimately causing wind turbine shutdown.

[0004] Therefore, it is necessary to design a rotary transmitter and pitch motor connection device to improve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coupling device for a rotary transmitter and a pitch motor.

[0006] This utility model provides a coupling device for a rotary transmitter and a pitch motor, including a coupling structure.

[0007] The longitudinal section of the coupling structure is convex. A fixing device is sleeved on the outer side of one end of the coupling structure, which is used to connect the coupling structure to the pitch motor drive shaft and the rotary transmitter rotor respectively. A sealing element is provided between the coupling structure and the fixing device.

[0008] Furthermore, the sealing element is an annular sealing gasket, and the sealing element is a PVC sealing element.

[0009] Furthermore, the coupling structure is provided with an integrally formed large cylinder and a small cylinder. A first mounting hole is provided at the center of one end of the large cylinder for cooperating with the drive shaft of the pitch motor. The fixing device is sleeved on the outer side of one end of the large cylinder. A second mounting hole is provided at the center of one end of the small cylinder for cooperating with the rotor of the rotary transmitter.

[0010] Furthermore, the fixing device is cylindrical, and a third mounting hole is provided at the center of the fixing device. One end of the coupling structure is installed in the third mounting hole. A boss is provided at the center of one end face of the fixing device, and a plurality of first threaded holes are provided on the perpendicularly intersecting diagonal lines of this end face of the fixing device, and the plurality of first threaded holes are located outside the boss; for connecting one end of the fixing device to the pitch motor end cover by screws passing through the first threaded holes.

[0011] The other end of the fixing device is provided with several second threaded holes on the perpendicular diagonal lines, which are used to connect the other end of the fixing device to the rotary transmitter by passing screws through the second threaded holes.

[0012] Furthermore, the boss has a height of 5-9mm and is used to mate with the end cover hole of the pitch motor.

[0013] Furthermore, the edge of the coupling structure facing the rotary transmitter is a chamfered bevel.

[0014] Furthermore, the top of the boss has several arc-shaped holes evenly distributed around its circumference, and the other end of the fixing device has several elongated holes evenly distributed around its circumference near the third mounting hole. These arc-shaped holes and elongated holes are used to ensure that the rotary transmitter is not easily loosened after installation and fastening.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The longitudinal section of the coupling structure in the coupling device of this utility model is "convex" shaped. A fixing device is sleeved on the outer side of one end of the coupling structure, which is used to connect the coupling structure to the pitch motor drive shaft and the rotary transmitter rotor respectively through the fixing device. A sealing element is provided between the coupling structure and the fixing device, so that the connection between the coupling structure and the rotary transmitter will not be worn or jammed, thereby reducing the failure rate of the wind turbine pitch system and solving the problem of wear or jamming when connected to the rotary transmitter.

[0017] (2) In this utility model, a boss is provided on one end face of the fixing device to cooperate with the hole of the pitch motor end cover. A plurality of first threaded holes are provided on the perpendicular diagonal line of the end face of the fixing device, and the plurality of first threaded holes are located outside the boss. The fixing device is connected to the pitch motor end cover by screws passing through the first threaded holes to prevent the fixing device from loosening or falling off. A plurality of second threaded holes are provided on the perpendicular diagonal line of the other end face of the fixing device for connecting the fixing device to the rotary transmitter by screws, so that the rotary transmitter is more securely fixed. Attached Figure Description

[0018] The following figures are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0019] Figure 1 : A schematic diagram of the coupling structure of this utility model;

[0020] Figure 2 Top view of one end of the fixing device of this utility model;

[0021] Figure 3 Top view of the other end face of the fixing device of this utility model;

[0022] In the diagram: 1-coupling structure, 2-seal, 3-fixing device, 4-bore, 5-sloping surface, 6-first threaded hole, 7-second threaded hole, 8-arc-shaped hole, 9-elongated hole. Detailed Implementation

[0023] To make the objectives, technical solutions, design methods, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0024] like Figures 1-3 As shown, this utility model provides a coupling device for a rotary transmitter and a pitch motor, including a coupling structure 1;

[0025] The longitudinal section of the coupling structure 1 is convex. A fixing device is sleeved on the outer side of one end of the coupling structure, which is used to connect the coupling structure to the pitch motor drive shaft and the rotary transmitter rotor respectively through the fixing device. A sealing element 2 is provided between the coupling structure and the fixing device to prevent wear or jamming when connecting the coupling structure 1 to the rotary transmitter.

[0026] Wherein, the sealing element 2 is an annular sealing gasket, and the sealing element 2 is a PVC sealing element; used to prevent wear or dust from entering the coupling structure 1;

[0027] It should be noted that the end face dimensions of the fixing device 3 are: diameter 125mm, inner ring diameter 47mm (i.e., outer diameter of the PVC annular sealing gasket), used to place the seal between the coupling structure and the fixing device. The PVC inner diameter is 25mm, the outer diameter is 47mm, the sealing gasket is 5mm wide × 3mm deep, and 7mm away from the outer ring. The annular sealing gasket is nested in the inner ring hole of the fixing device 3, and the annular sealing gasket is fitted onto the side wall of the large cylinder of the coupling structure 1. The rotary transmitter is connected to the small cylinder of the coupling structure 1, so that the connection between the coupling structure 1 and the rotary transmitter will not experience wear or jamming, thereby reducing the failure rate of the wind turbine pitch system and solving the problem of wear or jamming when connected to the rotary transmitter. The fixing device 3 is used to prevent the rotary transmitter from loosening or falling off.

[0028] The coupling structure 1 is provided with an integrally formed large cylinder and a small cylinder.

[0029] The large cylinder has a first mounting hole at the center of one end for engaging with the drive shaft of the pitch motor; the fixing device is sleeved on the outer side of one end of the large cylinder; the small cylinder has a second mounting hole at the center of one end for engaging with the rotor of the rotary transmitter.

[0030] Furthermore, the fixing device 3 is cylindrical, and a third mounting hole is provided at the center of the fixing device 3. One end of the coupling structure 1 is installed in the third mounting hole. A boss 4 is provided at the center of one end face of the fixing device 3, and a plurality of first threaded holes 6 are provided on the perpendicular diagonal lines of the end face of the fixing device 3, and the plurality of first threaded holes are located outside the boss; for connecting one end of the fixing device to the pitch motor end cover by screws passing through the first threaded holes.

[0031] The other end of the fixing device 3 is provided with several second threaded holes 7 on the perpendicular diagonal lines, which are used to connect the other end of the fixing device to the rotary transmitter by passing screws through the second threaded holes, so that the rotary transmitter is fixed more securely.

[0032] It should be noted that a first threaded hole 6 is provided on one end face of the fixing device 3. The diameter of the first threaded hole is 6mm, the arc-shaped hole is 20mm long × 3.5mm wide × 5mm deep, the sealing gasket is 5mm wide × 3mm deep, and the distance from the outer ring is 7mm. The fixing device 3 is connected to the pitch motor end cover by screws through the first threaded hole 6. The dimensions of the other end face of the fixing device 3 are: diagonal diameter 123mm. Several second threaded holes 7 are provided on the other end face of the fixing device 3. The several second threaded holes 7 include outer ring screw holes and inner ring screw holes. The outer ring screw hole is 5mm in size, the inner ring screw hole is 6mm in size, and the elongated hole is 35mm long × 4mm wide × 8mm deep. The third mounting hole at the other end of the fixing device 3 is provided with a step, the step being 7mm deep × 2mm wide. It is fastened to the rotary transmitter by screws through the several second threaded holes 7. After the rotary transmitter is installed and fastened, the fixing device 3 is secured to prevent the rotary transmitter from loosening due to the adsorption effect of the arc-shaped hole and the elongated hole 9.

[0033] The boss 4 has a height of 5-9mm and is used to mate with the end cover hole of the pitch motor.

[0034] The edge of the coupling structure facing the rotary transmitter is a chamfered bevel 5 to prevent damage to the rotary transmitter rotor.

[0035] The top of the boss has several arc-shaped holes 8 evenly distributed around its circumference, and the other end of the fixing device 3 has several elongated holes 9 evenly distributed around its circumference near the third mounting hole. After the rotary transmitter is installed and fastened, the fixing device 3 is fastened to the rotary transmitter by the adsorption effect of the arc-shaped holes and elongated holes 9, so that the rotary transmitter is not easy to loosen.

[0036] It should be noted that the coupling device of this utility model is applicable to the pitch motor of model LSPMB132M, and includes a coupling structure 1 and a fixing device 3.

[0037] The coupling structure 1 is an integral coupling structure 1. One end of the coupling structure 1 is fixed to the drive shaft of the pitch motor, and the other end is fixed to the rotor of the rotary transmitter. The coupling structure 1 is provided with an integrally formed large cylinder and a small cylinder. The large cylinder is connected to the drive shaft of the pitch motor. The large cylinder has a diameter of 25mm, a bore diameter of 13mm, and a thickness of 6mm. The small cylinder is connected to the rotor of the rotary transmitter. The small cylinder has a diameter of 12mm, a bore diameter of 6mm, and a thickness of 2.5mm. The edge of the coupling structure facing the rotary transmitter is chamfered to prevent damage to the rotor of the rotary transmitter.

[0038] It is worth noting that the coupling device of this utility model includes a coupling structure 1 and a fixing device 3 installed on the coupling structure 1. The fixing device 3 connects the coupling structure to the pitch motor drive shaft and the rotary transmitter rotor, respectively. A seal is provided between the coupling structure and the fixing device to prevent wear or jamming during the connection between the coupling structure 1 and the rotary transmitter. The fixing device 3 is sleeved onto the outer side of one end of the coupling structure 1 through the seal 2. A first mounting hole on one end face of the coupling structure 1 connects to the pitch motor drive shaft, and a second mounting hole on the other end of the coupling structure 1 connects to the rotary transmitter. The rotor is fitted; the boss 4 at one end of the fixing device 3 fits into the end cover hole of the pitch motor; the boss at one end of the fixing device fits into the end cover hole of the pitch motor, and a plurality of first threaded holes are provided on the perpendicular diagonal line of the fixing device end face, and the plurality of first threaded holes are located outside the boss. The fixing device end face is connected to the pitch motor end cover by screws passing through the first threaded holes to prevent the fixing device from loosening or falling off; a plurality of second threaded holes are provided on the perpendicular diagonal line of the other end face of the fixing device, which are used to connect the fixing device to the rotary transmitter by screws to make the rotary transmitter more secure.

[0039] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A coupling device for a rotary transmitter and a pitch motor, characterized in that, Including coupling structural components; The longitudinal section of the coupling structure is convex. A fixing device is sleeved on the outer side of one end of the coupling structure, which is used to connect the coupling structure to the pitch motor drive shaft and the rotary transmitter rotor respectively. A sealing element is provided between the coupling structure and the fixing device.

2. The coupling device for a rotary transmitter and a pitch motor according to claim 1, characterized in that, The sealing element is an annular sealing gasket, and the sealing element is a PVC sealing element.

3. The coupling device for a rotary transmitter and a pitch motor according to claim 1, characterized in that, The coupling structure consists of a large cylinder and a small cylinder formed in one piece. The large cylinder has a first mounting hole at the center of one end for engaging with the drive shaft of the pitch motor; the fixing device is fitted onto the outer side of one end of the large cylinder; and the small cylinder has a second mounting hole at the center of one end for engaging with the rotor of the rotary transmitter.

4. The coupling device for a rotary transmitter and a pitch motor according to claim 1, characterized in that, The fixing device is cylindrical, with a third mounting hole at its center. One end of the coupling structure is installed in the third mounting hole. A boss is provided at the center of one end face of the fixing device, and a plurality of first threaded holes are provided on the perpendicularly intersecting diagonal lines of this end face, with the plurality of first threaded holes located outside the boss. This is used to connect one end of the fixing device to the pitch motor end cover by passing screws through the first threaded holes. The other end of the fixing device is provided with several second threaded holes on the perpendicular diagonal lines, which are used to connect the other end of the fixing device to the rotary transmitter by passing screws through the second threaded holes.

5. The coupling device for a rotary transmitter and a pitch motor according to claim 4, characterized in that, The boss has a height of 5-9mm and is used to mate with the end cover hole of the pitch motor.

6. The coupling device for a rotary transmitter and a pitch motor according to claim 1, characterized in that, The edge of the coupling structure facing the rotary transmitter is chamfered.

7. The coupling device for a rotary transmitter and a pitch motor according to claim 4, characterized in that, The top of the boss has several arc-shaped holes evenly distributed around its circumference, and the other end of the fixing device has several elongated holes evenly distributed around its circumference near the third mounting hole. These arc-shaped holes and elongated holes are used to ensure that the rotary transmitter is not easily loosened after installation and tightening.

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