A wind turbine gearbox with speed limiting protection

Abstract

The present invention discloses a wind power gearbox with speed limit protection, which relates to the technical field of wind power gearboxes, and comprises a wind power gearbox body, one end of which is fixedly mounted with a generator coupling cylinder, one end of which is welded with a speed limit protection mechanism, a heat transfer mechanism is arranged on the inner ring surface of the speed limit protection mechanism, and the speed limit protection mechanism comprises an outer heat absorption sleeve, and the inner part of the outer heat absorption sleeve is provided with a thermal elastic bag, a push rod and a limit baffle. The present invention utilizes the thermal elastic bag to absorb the heat generated by the rotation of the generator main shaft, generates expansion, and then pushes the push rod and the linkage push rod to move, so that the linkage push rod slides in the limit baffle, pushes the heat transfer arc panel and the soft heat conductive shell to move and contact with the generator main shaft, and utilizes the friction between the two to limit the speed of the engine main shaft, thereby achieving the purpose of limiting the speed of the generator and preventing the overload of the generator due to inertia.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power gearboxes, and in particular to a wind power gearbox capable of speed limiting protection. Background Art

[0002] Gearboxes are widely used in wind turbines. They are often used in wind turbines and are an important mechanical component. The main function of the gearbox is to transmit the power generated by the wind rotor under the action of wind to the generator and make it obtain a corresponding rotation speed. Usually, the rotation speed of the wind rotor is very low, far from the rotation speed required by the generator to generate electricity. It must be achieved through the speed increase effect of the gear pair of the gearbox, so the gearbox is also called a speed increaser. However, the existing wind power gearbox still has certain shortcomings in actual use. When the wind power gearbox is in use, after the wind rotor speed increases, due to the influence of inertia, the main shaft of the generator often runs too fast, which easily causes the generator to overload, and the friction of the components in the gearbox will accumulate heat, affecting the overall safety of the wind power gearbox. Summary of the invention

[0003] The present invention provides a wind turbine gearbox capable of speed limiting protection to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A wind turbine gearbox with speed limit protection comprises a wind turbine gearbox main body, one end of the wind turbine gearbox main body is fixedly mounted with a generator coupling cylinder, one end of the generator coupling cylinder is welded with a speed limit protection mechanism, a heat transfer mechanism is arranged on the inner ring surface of the speed limit protection mechanism, the speed limit protection mechanism comprises an outer heat absorption sleeve, a thermal elastic bag, a push rod and a limit baffle are arranged inside the outer heat absorption sleeve, a linkage push rod is fixedly mounted on the outer surface of the push rod, the heat transfer mechanism comprises a heat transfer arc panel and a soft heat conductive shell, an elastic pressure-resistant plate, a micro-elastic heat-collecting fin and a heat exchange strip are arranged inside the soft heat conductive shell, and the wind turbine gearbox main body, the generator coupling cylinder, the speed limit protection mechanism and the heat transfer mechanism and other related components cooperate to solve the problem that when the wind turbine gearbox is in use, after the wind wheel speed increases, due to inertia, the main shaft of the generator often runs too fast, which easily causes the generator to overload, and the friction of components in the gearbox accumulates heat, affecting the overall safety of the wind turbine gearbox.

[0006] A further improvement of the technical solution of the present invention is that: the side surface of the outer heat absorbing sleeve is fixedly connected to one end of the generator coupling cylinder, a built-in cavity is provided inside the outer heat absorbing sleeve, a positioning mounting seat is welded on the inner surface of the outer heat absorbing sleeve, and the outer surface of the positioning mounting seat is fixedly connected to the outer surface of the thermal elastic bag.

[0007] A further improvement of the technical solution of the present invention lies in that: the outer surface of the thermal elastic bag is fixedly connected to the outer surface of the push rod, the outer surface of the limit baffle is fixedly connected to the inner wall of the outer heat absorbing sleeve, the outer surface of the limit baffle is fixedly connected to a fixing cylinder, and the outer surface of the fixing cylinder is fixedly connected to the inner wall of the outer heat absorbing sleeve, the thermal elastic bag is utilized to absorb the heat generated by the rotation of the generator main shaft to generate expansion, thereby pushing the push rod and the linkage push rod to move, the linkage push rod is utilized to slide in the limit baffle, the heat transfer arc panel and the soft heat conductive shell are pushed to move and contact with the generator main shaft, and the friction between the two is utilized to limit the speed of the engine main shaft.

[0008] A further improvement of the technical solution of the present invention lies in that: the outer surface of the connecting push rod is slidably connected with the limit baffle and the inner wall of the fixed cylinder, one end of the connecting push rod extends to the outside of the fixed cylinder and is fixedly connected to the surface of the heat transfer arc panel, a pressure plate is fixedly connected to the outer surface of the connecting push rod, a spring sheet is fixedly installed on the outer surface of the pressure plate, one end of the spring sheet is fixedly connected to the inner surface of the fixed cylinder, and the elastic modulus changes to generate a rebound force through the cooperation of the spring sheet and the pressure plate, so that the connecting push rod is applied with an external force so that the connecting push rod can return to its original position.

[0009] A further improvement of the technical solution of the present invention is that: an arc-shaped connecting rod is fixedly connected to the inner surface of the fixed cylinder, one end of the arc-shaped connecting rod is provided with a roller, a limiting rolling groove is provided on the outer surface of the linked push rod, the outer surface of the roller is movably connected to the inner wall of the limiting rolling groove, and an elastic pull rope is fixedly connected to the inner cavity surface of the fixed cylinder, one end of the elastic pull rope is fixedly connected to the outer surface of the linked push rod, and the elastic pulling of the elastic pull rope and the limiting of the roller are coordinated to ensure the stability of the linked push rod during use and ensure the safety of the overall device during use.

[0010] A further improvement of the technical solution of the present invention is that the surface of the heat transfer arc panel is movably connected to the inner ring surface of the outer heat absorption sleeve, the two ends of the soft heat conductive shell are fixedly connected to the outer surface of the heat transfer arc panel, and a central axis arranged on the inner side of the soft heat conductive shell is fixedly installed on the outer surface of the heat transfer arc panel.

[0011] A further improvement of the technical solution of the present invention lies in that: the outer surface of the central axis is fixedly connected to one end of the elastic pressure-resistant plate, the other end of the elastic pressure-resistant plate is fixedly connected to the inner surface of the heat exchange strip, and the elastic pressure-resistant plate is symmetrically arranged about the center line of the heat exchange strip, and the friction force between the soft heat-conductive shell and the generator main shaft is utilized to cause the soft heat-conductive shell to deform, and then cooperate with the heat exchange effect of the heat exchange strip to guide the heat generated on the generator main shaft due to friction to the micro-elastic heat-collecting fins and the heat transfer arc panel to transfer the heat.

[0012] A further improvement of the technical solution of the present invention is that the outer surface of the heat exchange strip is fixedly connected to the inner surface of the soft heat-conducting shell, and the heat exchange strips are evenly distributed on the inner surface of the soft heat-conducting shell at equal intervals, and the inner surface of the elastic pressure-resistant plate is fixedly connected to the outer surface of the micro-elastic heat-conducting fins, and the rebound force generated by the material properties of the elastic pressure-resistant plate is used to ensure the contact surface between the micro-elastic heat-conducting fins and the heat exchange strips and the soft heat-conducting shell when in use.

[0013] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0014] 1. The present invention provides a wind turbine gearbox with speed limit protection. Through the coordination of relevant components of the wind turbine gearbox body, the generator coupling cylinder, the speed limit protection mechanism and the heat transfer mechanism, the present invention solves the problem that when the wind turbine gearbox is in use, after the wind wheel speed is increased, due to inertia, the main shaft of the generator often runs too fast, which easily causes the generator to overload, and the friction of components in the gearbox will accumulate heat, affecting the overall safety of the wind turbine gearbox.

[0015] 2. The present invention provides a wind turbine gearbox with speed-limiting protection. In the device, a thermal elastic bag is used to absorb the heat generated by the rotation of the generator main shaft, causing expansion, thereby pushing the push rod and the linkage push rod to move, so that the linkage push rod slides in the limit baffle, pushing the heat arc panel and the soft heat-conducting shell to move and contact the generator main shaft, and utilizing the friction between the two to limit the speed of the engine main shaft, thereby achieving the purpose of limiting the speed of the generator and preventing inertia from causing overload of the generator.

[0016] 3. The present invention provides a wind turbine gearbox with speed-limiting protection. The elastic modulus changes to generate a rebound force through the cooperation of a spring sheet and a pressure plate, and an external force is applied to the linkage top rod, so that the linkage top rod can return to its original position. In addition, the elastic traction of the elastic pull rope and the limiting of the roller ensure the stability of the linkage top rod during use, thereby ensuring the safety of the entire device during use.

[0017] 4. The present invention provides a wind turbine gearbox with speed-limiting protection. The friction between the soft heat-conducting shell and the generator main shaft is used to deform the soft heat-conducting shell. The heat generated by the friction on the generator main shaft is guided to the micro-elastic heat-collecting fins and the heat-converting arc panel by the heat exchange effect of the heat exchange strip to transfer the heat. In addition, the resilience generated by the material characteristics of the elastic pressure-resistant plate is used to ensure the contact surface between the micro-elastic heat-collecting fins and the heat exchange strips and the soft heat-conducting shell when in use, thereby achieving the effect of efficiently cooling the generator main shaft and improving the overall use efficiency and service life of the wind turbine gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of the structural speed limiting protection mechanism of the present invention;

[0020] Figure 3 The structure of the present invention Figure 2 A magnified schematic diagram of point A;

[0021] Figure 4 It is a cross-sectional schematic diagram of the structural fixing cylinder of the present invention;

[0022] Figure 5 It is a cross-sectional schematic diagram of the structural heat transfer mechanism of the present invention;

[0023] Figure 6 The structure of the present invention Figure 5 An enlarged schematic diagram of point B.

[0024] In the figure: 1. Wind turbine gearbox body; 2. Generator coupling cylinder; 3. Speed ​​limit protection mechanism; 31. External heat absorption sleeve; 32. Internal cavity; 33. Positioning mounting seat; 34. Thermal elastic bag; 35. Push rod; 36. Limit baffle; a1. Fixed cylinder; a2. Linking top rod; a21. Limit rolling groove; a3. Elastic pull rope; a4. Arc connecting rod; a41. Roller; a5. Shrapnel; a51. Pressure plate; 4. Heat transfer mechanism; 41. Heat transfer arc panel; 42. Soft heat conductive shell; 421. Middle shaft; 422. Elastic pressure-resistant plate; 423. Micro-elastic heat-collecting fins; 424. Heat exchange strip. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with embodiments:

[0026] Example 1

[0027] like Figure 1-6 As shown, the present invention provides a wind turbine gearbox with speed limit protection, including a wind turbine gearbox main body 1, a generator coupling cylinder 2 is fixedly installed at one end of the wind turbine gearbox main body 1, a speed limit protection mechanism 3 is welded to one end of the generator coupling cylinder 2, a heat transfer mechanism 4 is arranged on the inner ring surface of the speed limit protection mechanism 3, the speed limit protection mechanism 3 includes an outer heat absorption sleeve 31, a thermal elastic bag 34, a push rod 35 and a limit baffle 36 are arranged inside the outer heat absorption sleeve 31, a linkage push rod a2 is fixedly installed on the outer surface of the push rod 35, the heat transfer mechanism 4 includes a heat transfer arc panel 41 and a soft heat conductive shell 42, and an elastic pressure-resistant plate 422, a micro-elastic heat-collecting fin 423 and a heat exchange strip 424 are arranged inside the soft heat conductive shell 42.

[0028] Furthermore, the side surface of the outer heat absorbing sleeve 31 is fixedly connected to one end of the generator coupling cylinder 2, and the interior of the outer heat absorbing sleeve 31 is provided with a built-in cavity 32. A positioning mounting seat 33 is welded on the inner surface of the outer heat absorbing sleeve 31, and the outer surface of the positioning mounting seat 33 is fixedly connected to the outer surface of the thermal elastic capsule 34, and the outer surface of the thermal elastic capsule 34 is fixedly connected to the outer surface of the push rod 35. The outer surface of the limiting baffle 36 is fixedly connected to the inner wall of the outer heat absorbing sleeve 31, and the outer surface of the limiting baffle 36 is fixedly connected to the fixing cylinder a1, and the outer surface of the fixing cylinder a1 is fixedly connected to the inner wall of the outer heat absorbing sleeve 31. The thermal elastic capsule 34 absorbs the heat generated by the rotation of the generator main shaft and generates expansion, thereby pushing the push rod 35 and the linkage push rod a2 to move, so that the linkage push rod a2 slides in the limiting baffle 36, pushing the heat transfer arc panel 41 and the soft heat conductive shell 42 to move and contact with the generator main shaft, and utilizing the friction between the two to limit the speed of the engine main shaft, thereby steadily reducing the speed of the generator main shaft.

[0029] Example 2

[0030] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the outer surface of the linkage push rod a2 is slidably connected with the limit baffle 36 and the inner wall of the fixed cylinder a1, one end of the linkage push rod a2 extends to the outside of the fixed cylinder a1 and is fixedly connected to the surface of the heat transfer arc panel 41, a pressure plate a51 is fixedly connected to the outer surface of the linkage push rod a2, a spring piece a5 is fixedly installed on the outer surface of the pressure plate a51, one end of the spring piece a5 is fixedly connected to the inner surface of the fixed cylinder a1, and an arc-shaped connecting rod a4 is fixedly connected to the inner surface of the fixed cylinder a1, and one end of the arc-shaped connecting rod a4 is fixedly connected to the inner surface of the fixed cylinder a1. A roller a41 is provided at the end, and a limiting rolling groove a21 is provided on the outer surface of the linkage push rod a2. The outer surface of the roller a41 is movably connected to the inner wall of the limiting rolling groove a21. The inner cavity surface of the fixed cylinder a1 is fixedly connected with an elastic pull rope a3. One end of the elastic pull rope a3 is fixedly connected to the outer surface of the linkage push rod a2. The elastic modulus changes through the deformation of the spring piece a5 to generate a rebound force, and an external force is applied to the linkage push rod a2, so that the linkage push rod a2 returns to its original position. In combination with the elastic pulling of the elastic pull rope a3 and the limiting of the roller a41, the stability of the linkage push rod a2 during use is ensured.

[0031] Example 3

[0032] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the surface of the heat transfer arc panel 41 is movably connected to the inner ring surface of the outer heat absorption sleeve 31, and the two ends of the soft heat conductive shell 42 are fixedly connected to the outer surface of the heat transfer arc panel 41. A central axis 421 arranged on the inner side of the soft heat conductive shell 42 is fixedly installed on the outer surface of the heat transfer arc panel 41, and the outer surface of the central axis 421 is fixedly connected to one end of the elastic pressure-resistant plate 422, and the other end of the elastic pressure-resistant plate 422 is fixedly connected to the inner surface of the heat exchange strip 424, and the elastic pressure-resistant plate 422 is symmetrically arranged about the center line of the heat exchange strip 424, and the outer surface of the heat exchange strip 424 is fixedly connected to the inner surface of the soft heat conductive shell 42. The inner surface is fixedly connected, and the heat exchange strips 424 are evenly distributed on the inner surface of the soft heat-conducting shell 42 at equal intervals. The inner surface of the elastic pressure-resistant plate 422 is fixedly connected to the outer surface of the micro-elastic heat-collecting fins 423. The friction force between the soft heat-conducting shell 42 and the generator main shaft is used to deform the soft heat-conducting shell 42. Combined with the heat exchange effect of the heat exchange strips 424, the heat generated by friction on the generator main shaft is guided to the micro-elastic heat-collecting fins 423 and the heat transfer arc panel 41 to transfer heat. The resilience generated by the material properties of the elastic pressure-resistant plate 422 is used to ensure the contact surface between the micro-elastic heat-collecting fins 423 and the heat exchange strips 424 and the soft heat-conducting shell 42 when in use.

[0033] The following is a detailed description of the working principle of the wind turbine gearbox.

[0034] like Figure 1-6 As shown, when in use, when the engine main shaft rotates too fast, the thermal elastic bag 34 is first used to absorb the heat dissipated by the rotation of the generator main shaft, causing expansion, and then pushing the push rod 35 and the linkage push rod a2 to move, so that the linkage push rod a2 slides in the limit baffle 36, pushing the heat transfer arc panel 41 and the soft heat conductive shell 42 to move and contact the generator main shaft, and using the friction between the two to limit the speed of the engine main shaft and reduce the speed of the generator main shaft. At the same time, the friction between the soft heat conductive shell 42 and the generator main shaft is used to cause the soft heat conductive shell 42 to deform, and then cooperate with the heat exchange effect of the heat exchange strip 424 to guide the heat generated by friction on the generator main shaft to the micro-elastic heat collecting fins 423 and the heat transfer arc panel 41 for heat transfer, and using the outer heat absorption sleeve 31 and the heat transfer arc panel 41 to increase the contact area with the outside world, accelerate the heat dissipation, and reduce the temperature while limiting the speed.

[0035] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A wind turbine gearbox capable of speed limiting protection, comprising a wind turbine gearbox body (1), one end of the wind turbine gearbox body (1) being fixedly mounted with a generator coupling cylinder (2), characterized in that: A speed limiting protection mechanism (3) is welded to one end of the generator coupling cylinder (2); a heat transfer mechanism (4) is arranged on the inner ring surface of the speed limiting protection mechanism (3); the speed limiting protection mechanism (3) comprises an outer heat absorbing sleeve (31); a thermal elastic bag (34), a push rod (35) and a limit baffle (36) are arranged inside the outer heat absorbing sleeve (31); a linkage push rod (a2) is fixedly mounted on the outer surface of the push rod (35); the heat transfer mechanism (4) comprises a heat transfer arc panel (41) and a soft heat conductive shell (42); an elastic pressure-resistant plate (422), micro-elastic heat-collecting fins (423) and a heat exchange strip (424) are arranged inside the soft heat conductive shell (42); The outer surface of the thermal elastic bag (34) is fixedly connected to the outer surface of the push rod (35); the outer surface of the limit baffle (36) is fixedly connected to the inner wall of the outer heat absorbing sleeve (31); the outer surface of the limit baffle (36) is fixedly connected to the fixed cylinder (a1), and the outer surface of the fixed cylinder (a1) is fixedly connected to the inner wall of the outer heat absorbing sleeve (31); the outer surface of the linkage push rod (a2) is slidably connected to the limit baffle (36) and the inner wall of the fixed cylinder (a1); one end of the linkage push rod (a2) extends to the outside of the fixed cylinder (a1) and is fixedly connected to the surface of the heat transfer arc panel (41); the outer surface of the linkage push rod (a2) is fixedly connected to a pressure plate (a51); the outer surface of the pressure plate (a51) is fixedly mounted with a spring sheet (a5); one end of the spring sheet (a5) is fixedly connected to the inner surface of the fixed cylinder (a1); The surface of the heat transfer arc panel (41) is movably connected to the inner ring surface of the outer heat absorption sleeve (31), the two ends of the soft heat conductive shell (42) are fixedly connected to the outer surface of the heat transfer arc panel (41), and a central axis (421) arranged on the inner side of the soft heat conductive shell (42) is fixedly mounted on the outer surface of the heat transfer arc panel (41).

2. A wind turbine gearbox with speed limit protection according to claim 1, characterized in that: The side surface of the outer heat absorbing sleeve (31) is fixedly connected to one end of the generator coupling sleeve (2); a built-in cavity (32) is provided inside the outer heat absorbing sleeve (31); a positioning mounting seat (33) is welded on the inner surface of the outer heat absorbing sleeve (31); and the outer surface of the positioning mounting seat (33) is fixedly connected to the outer surface of the thermal elastic bag (34).

3. A wind turbine gearbox with speed limit protection according to claim 1, characterized in that: An arc-shaped connecting rod (a4) is fixedly connected to the inner surface of the fixed cylinder (a1), one end of the arc-shaped connecting rod (a4) is provided with a roller (a41), the outer surface of the linkage push rod (a2) is provided with a limit rolling groove (a21), the outer surface of the roller (a41) is movably connected to the inner wall of the limit rolling groove (a21), the inner cavity surface of the fixed cylinder (a1) is fixedly connected to an elastic pull rope (a3), one end of the elastic pull rope (a3) ​​is fixedly connected to the outer surface of the linkage push rod (a2).

4. A wind turbine gearbox with speed-limiting protection according to claim 1, characterized in that: The outer surface of the central axis (421) is fixedly connected to one end of the elastic pressure-resistant plate (422), the other end of the elastic pressure-resistant plate (422) is fixedly connected to the inner surface of the heat exchange strip (424), and the elastic pressure-resistant plate (422) is symmetrically arranged about the center line of the heat exchange strip (424).

5. A wind turbine gearbox with speed-limiting protection according to claim 1, characterized in that: The outer surface of the heat exchange strip (424) is fixedly connected to the inner surface of the soft heat conductive shell (42), and the heat exchange strips (424) are evenly distributed on the inner surface of the soft heat conductive shell (42) at equal intervals, and the inner surface of the elastic pressure-resistant plate (422) is fixedly connected to the outer surface of the micro-elastic heat-collecting fin (423).

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