Lubricating mechanism for variable pitch system

Abstract

The utility model relates to the technical field of mechanical lubrication, in particular to a lubricating mechanism for a variable pitch system, which comprises a transmission seat and a lubricating mechanism, a lubricating mechanism is arranged at the top of the transmission seat; a transmission shaft is rotationally arranged in the transmission seat through a bearing; after the transmission shaft is monitored to run for one circle, counting is performed once through mutual induction of the counter and the inductor; therefore, the operation times of the transmission shaft can be monitored. When the detection assembly monitors that the number of turns reaches the lubrication maintenance requirement, the micro motor receives a feedback signal and carries out self-starting; the push rod is intermittently pressed by rotating the cam; and finally, the lubricating oil enters the space between the two sealing rings from the oil drainage hole through the oil pipe to lubricate the space between the two sealing rings. In the lubricating process, the variable pitch system is automatically lubricated; and the influence on the operation of the whole variable pitch system due to non-continuous lubrication maintenance is greatly reduced.

Description

Technical Field

[0001] This application relates to the technical field of mechanical lubrication, and particularly to a lubrication mechanism for a pitch system. Background Art

[0002] In a wind turbine pitch system, there are different types of drive main shafts or auxiliary shafts; bearings need to be provided at the shaft rotation points to reduce friction; a lubricating pump is sequentially connected to each level of distributor to alternately supply lubricating grease to each bearing lubrication point, and a plunger detector is provided on the main distributor to monitor the working state of the entire system.

[0003] The bearing allows the required oscillations to control the load and power of the wind turbine. As one of the core components of the control system of a large wind turbine unit, the pitch bearing plays a very important role in the safe, stable, and efficient operation of the unit. The pitch bearing controls the position angle of the blade relative to the rotation plane and is a component of a modern wind turbine.

[0004] Most existing pitch bearings require continuous external addition of lubricating oil. When lubricating with lubricating oil, the pitch bearing must be disassembled and then the lubricating oil is applied, which is very cumbersome and takes a lot of time and cost.

[0005] Based on the problems existing in the above-mentioned prior art, improvements are needed. Content of the Utility Model

[0006] The purpose of this application is to overcome the deficiencies in the prior art and propose a lubrication mechanism for a pitch system.

[0007] This application is achieved through the following technical solutions:

[0008] This application proposes a lubrication mechanism for a pitch system, including a transmission seat and a lubrication mechanism; a lubrication mechanism is provided at the top of the transmission seat; a transmission shaft is rotatably arranged inside the transmission seat through a bearing; sealing rings are arranged on both the front and rear sides of the bearing and between the transmission shaft and the outer shell of the transmission seat; lubricating oil is directly added between the two sealing rings.

[0009] In an embodiment of this application, the lubrication mechanism includes a support, a lubricating oil storage tank is provided at the top of the support; a filling port is provided at the top of the lubricating oil storage tank; a driving component is provided inside the lubricating oil storage tank; an oil control valve is provided at the bottom of the lubricating oil storage tank, and the lower end of the oil control valve penetrates through the support. The oil control valve is connected and communicated with the sealing ring through an oil pipe; a push rod is provided inside the top of the oil control valve; the push rod is used to control the discharge of the lubricating oil inside the lubricating oil storage tank.

[0010] In an embodiment of the present application, the driving assembly includes a micro motor; the micro motor is fixedly connected to the lubricating storage tank; a cam is fixedly arranged on the output shaft of the micro motor, and a micro bearing is arranged at the other end of the output shaft; the end of the output shaft away from the micro motor is rotationally connected to the lubricating storage tank through the micro bearing; the cam matches the top of the push rod; a detection assembly is arranged below the micro motor.

[0011] In an embodiment of the present application, inside the oil control valve, a sealing ball one spring guide block and a sealing ball two are arranged on one side from bottom to top; an installation hole is opened at the top of the oil control valve; the push rod is arranged inside the installation hole; an oil discharge hole is opened on one side below the oil control valve, and the oil discharge hole is connected and communicated with the sealing ring through a oil pipe.

[0012] In an embodiment of the present application, the detection assembly includes a fixing plate; the lower end of the fixing plate is adjustably connected with an adjusting plate, a counter is arranged at the lower end of the adjusting plate; an inductor is arranged on one side of the counter; the inductor is fixed on the installation ring, and the installation ring is fixedly installed on the transmission shaft to be lubricated.

[0013] In an embodiment of the present application, the upper end of the fixing plate is fixedly connected to the micro motor.

[0014] In an embodiment of the present application, a fuel filling pipe is connected to the fuel filling port.

[0015] Advantages of the present application:

[0016] In this utility model, after monitoring that the transmission shaft runs one circle, the counter and the inductor sense each other once for counting once; in this way, the running times of the transmission shaft are monitored; when the number of circles monitored by the detection assembly reaches the lubrication maintenance requirement, at this time, the micro motor receives the feedback signal and starts automatically; the cam rotates to intermittently press the push rod; thereby realizing the intermittent discharge of lubricating oil by the sealing ball two, and finally the lubricating oil enters between the two sealing rings through the oil discharge hole and the oil pipe for lubrication; the above lubrication process realizes the automatic lubrication of the pitch system; greatly reduces the influence on the operation of the entire pitch system due to insufficient lubrication maintenance. Brief Description of the Drawings

[0017] Figure 1 It is the overall structure schematic diagram of the present application;

[0018] Figure 2 It is the internal structure schematic diagram of the transmission seat of the present application;

[0019] Figure 3 It is the oil pipe structure schematic diagram of the present application;

[0020] Figure 4 It is the detection assembly structure schematic diagram of the present application;

[0021] Figure 5 Schematic diagram of the drive component structure of the present application;

[0022] Figure 6 Schematic diagram of the internal structure of the oil control valve of the present application.

[0023] Reference numerals: 1, transmission seat; 11, bearing; 111, sealing ring; 12, transmission shaft; 2, lubrication mechanism; 21, support; 22, oil control valve; 221, first sealing ball; 222, spring; 223, guide block; 224, second sealing ball; 225, mounting hole; 226, oil drain hole; 23, push rod; 3, drive component; 31, micro motor; 32, cam; 33, micro bearing; 4, detection component; 41, fixing plate; 42, adjusting plate; 421, counter; 43, mounting ring; 44, inductor; 5, oil pipe. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly disposed on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0026] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0028] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover.

[0029] Please refer to Figure 1 and Figure 2 , this application proposes a lubrication mechanism for a pitch system, which includes a transmission seat 1 and a lubrication mechanism 2; a lubrication mechanism 2 is provided at the top of the transmission seat 1; there are different types of main transmission shafts or auxiliary shafts in the wind turbine pitch system; bearings need to be provided at the shaft rotation points to reduce friction; as the operation time of the equipment increases, it is necessary to add lubricating oil to the bearing area irregularly; a transmission shaft 12 is rotatably arranged inside the transmission seat 1 through a bearing 11; as an implementable manner, sealing rings 111 are arranged on both the front and rear sides of the bearing 11 and between the transmission shaft 12 and the outer shell of the transmission seat 1; the sealing rings 111 are used for sealing; lubricating oil can be directly added between the two sealing rings 111; in this way, the lubricating oil accumulates inside the two sealing rings 111, and the bearing 11 can be lubricated by immersion.

[0030] Please refer to Figure 3 , the lubrication mechanism 2 includes a support 21, and a lubricating oil storage tank is provided at the top of the support 21; a fuel filling port is provided at the top of the lubricating oil storage tank; a fuel filling pipe can be connected to the fuel filling port, so that even if the transmission seat 1 is in a narrow space, oil can be replenished through the fuel filling pipe; a driving component 3 is arranged inside the lubricating oil storage tank; an oil control valve 22 is provided at the bottom of the lubricating oil storage tank, and the lower end of the oil control valve 22 penetrates through the support 21. The oil control valve 22 is connected and communicated with the sealing ring 111 through an oil pipe 5; a push rod 23 is arranged inside the top of the oil control valve 22; the push rod 23 is used to control the discharge of the lubricating oil inside the lubricating oil storage tank.

[0031] Please refer to Figure 4 and Figure 5, the drive assembly 3 includes a micro motor 31. The micro motor 31 is a servo motor and is internally provided with a control module of the lubrication system. When the control module can receive the start lubrication maintenance feedback signal, it will self-start the micro motor 31; the micro motor 31 is fixedly connected to the lubricating oil storage tank; a cam 32 is fixedly arranged on the output shaft of the micro motor 31, and a micro bearing 33 is arranged at the other end of the output shaft; the end of the output shaft far from the micro motor 31 is rotationally connected to the lubricating oil storage tank through the micro bearing 33; the cam 32 matches the top of the push rod 23; a detection assembly 4 is arranged below the micro motor 31. The detection assembly 4 is used to detect the number of running circles of the transmission shaft 12; as the running time of the pitch system increases, it can be converted into the size of the number of running circles of the transmission shaft 12; by counting the number of running circles of the transmission shaft 12 by the detection assembly 4, it can be set that when the transmission shaft 12 runs a certain number of times, the micro motor 31 can be automatically started to open, and lubricating oil can be continuously supplemented into the transmission seat 1;

[0032] Please refer to Figure 6 , inside the oil control valve 22, a sealing ball one 221, a spring 222, a guide block 223 and a sealing ball two 224 are arranged on one side from bottom to top; an installation hole 225 is opened at the top of the oil control valve 22; the push rod 23 is arranged inside the installation hole 225; an oil discharge hole 226 is opened on one side below the oil control valve 22. The oil discharge hole 226 is connected and communicated with the sealing ring 111 through a pipeline 5; in the natural state, the sealing ball two 224 plugs and seals the bottom of the installation hole 225 through the guide block 223 under the action of the spring 222, so as to prevent the lubricating oil inside the lubricating oil storage tank from entering the oil control valve 22;

[0033] Please refer to Figure 4 , the detection assembly 4 includes a fixing plate 41. The upper end of the fixing plate 41 is fixedly connected to the micro motor 31; the lower end of the fixing plate 41 is adjustably connected with an adjusting plate 42. A counter 421 is arranged at the lower end of the adjusting plate 42; a sensor 44 is arranged on one side of the counter 421; the sensor 44 is fixed on the installation ring 43, and the installation ring 43 is fixedly installed on the transmission shaft 12 to be lubricated; thus, when the transmission shaft 12 runs one circle, the counter 421 and the sensor 44 sense each other once for counting once; thus, the number of running times of the transmission shaft 12 can be monitored; when it is monitored by the detection assembly 4 that the number of circles reaches the lubrication maintenance requirement, at this time, the micro motor 31 receives the feedback signal and self-starts; by rotating the cam 32, the push rod 23 is intermittently pressed; thus, the sealing ball two 224 intermittently discharges lubricating oil, and finally the lubricating oil enters between the two sealing rings 111 through the oil discharge hole 226 and the pipeline 5 for lubrication; the above lubrication process realizes the self-lubrication of the pitch system; it greatly reduces the influence on the operation of the entire pitch system due to insufficient lubrication maintenance.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lubrication mechanism for a pitch control system, comprising a transmission seat (1) and a lubrication mechanism (2); characterized in that: A lubrication mechanism (2) is arranged on the top of the transmission seat (1); a transmission shaft (12) is rotatably arranged inside the transmission seat (1) via a bearing (11); sealing rings (111) are arranged on both sides of the front and rear of the bearing (11) and between the transmission shaft (12) and the outer shell of the transmission seat (1); and lubricating oil is directly added between the two sealing rings (111).

2. The lubrication mechanism for a pitch system according to claim 1, characterized in that: The lubrication mechanism (2) comprises a support (21), a lubrication storage box is arranged on the top of the support (21); a refueling port is arranged on the top of the lubrication storage box; a driving assembly (3) is arranged inside the lubrication storage box; an oil control valve (22) is arranged at the bottom of the lubrication storage box, the lower end of the oil control valve (22) passes through the support (21); the oil control valve (22) is connected to and communicates with a sealing ring (111) through an oil pipe (5); a push rod (23) is arranged inside the top of the oil control valve (22); the push rod (23) is used to control the discharge of lubrication oil inside the lubrication storage box.

3. The lubrication mechanism for a pitch system according to claim 2, characterized in that: The driving assembly (3) comprises a micro motor (31); the micro motor (31) is fixedly connected to a lubricating storage box; a cam (32) is fixedly provided on an output shaft of the micro motor (31), and a micro bearing (33) is provided at the other end of the output shaft; one end of the output shaft away from the micro motor (31) is rotatably connected to the lubricating storage box via the micro bearing (33); the cam (32) matches the top of the push rod (23); and a detection assembly (4) is provided below the micro motor (31).

4. The lubrication mechanism for a pitch system according to claim 2, characterized in that: A sealing ball (221), a spring (222), a guide block (223) and a sealing ball (224) are arranged on one side from bottom to top inside the oil control valve (22); a mounting hole (225) is provided on the top of the oil control valve (22); the push rod (23) is arranged inside the mounting hole (225); an oil drain hole (226) is provided on one side below the oil control valve (22); the oil drain hole (226) is connected and communicated with the sealing ring (111) through an oil pipe (5).

5. The lubrication mechanism for a pitch system according to claim 3, characterized in that: The detection assembly (4) comprises a fixing plate (41); the fixing plate (41) is adjustably connected to an adjusting plate (42) at its lower end, and a counter (421) is arranged at the lower end of the adjusting plate (42); a sensor (44) is arranged on one side of the counter (421); the sensor (44) is fixed on a mounting ring (43), and the mounting ring (43) is fixedly mounted on a transmission shaft (12) to be lubricated.

6. The lubrication mechanism for a pitch system according to claim 5, characterized in that: The upper end of the fixing plate (41) is fixedly connected to the micro motor (31).

7. The lubrication mechanism for a pitch system according to claim 2, characterized in that: The refueling port is connected with a refueling pipe.

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