Lubricating apparatus

Abstract

The present disclosure relates to a lubricating device, comprising: a mounting frame; a housing comprising a cavity and connected to the mounting frame; a driven rod rotatably connected to the housing about its own axis and having a first rod body extending into the housing and a second rod body located outside the housing; a push plate coaxially sleeved and threadedly connected to the first rod body, and the push plate being movably connected to an inner wall surface of the cavity along an axial direction of the first rod body, the push plate and the housing jointly forming a storage space for storing lubricating medium in the cavity; a driven gear coaxially connected to the second rod body; wherein the driven rod and the driven gear jointly form a medium channel for the lubricating medium to flow inside the driven gear, the driven rod has an inlet communicating with the medium channel and the storage space, and the driven gear is provided with at least one outlet communicating with the medium channel on an engagement surface thereof. The lubricating device can use the power generated by the automatic yawing or the variable pitch of the wind turbine generator to apply grease to the gear engagement part.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wind turbine lubrication, in particular, to a lubrication device. BACKGROUND

[0002] The wind turbine mainly adopts gear engagement to conduct power transmission to make the unit to perform variable pitch or yaw. In order to prolong the service life of the gear engagement, the active gear face lubricator appears on the market to maintain the oil on the gear engagement position. The existing lubricator mainly has the following problems: the lubricator needs additional power to drive the lubricator to smear oil on the gear, which produces additional energy consumption; the oil output also occurs when the variable pitch or yaw is not performed, which causes a certain waste of oil. SUMMARY

[0003] The purpose of the present disclosure is to provide a lubrication device which can realize passive, without manual operation and using the power generated by the automatic yaw or variable pitch of the wind turbine to smear oil on the gear engagement position, so as to at least partially solve the above problems.

[0004] In order to achieve the above purpose, the present disclosure provides a lubrication device for a wind turbine, the wind turbine comprising a rack, a motor, a driving gear arranged on an output shaft of the motor, and a gear ring engaged with the driving gear, the motor being arranged on the rack, the motor being capable of moving synchronously with the rack along a circumferential direction of the gear ring through the engagement transmission of the driving gear and the gear ring, the lubrication device comprising: a mounting frame for being fixed to the rack; a housing comprising a cavity and being connected to the mounting frame; a driven rod being rotatably connected to the housing about an axis thereof, the driven rod having a first rod body extending into the housing and a second rod body located outside the housing; a push plate coaxially sleeving and threadedly connected to the first rod body, and the push plate being movably connected to an inner wall surface of the cavity along an axial direction of the first rod body, the push plate and the housing jointly forming a storage space for storing lubricating medium in the cavity; a driven gear coaxially connected to the second rod body and being used for engaging with the gear ring; wherein the driven rod and the inside of the driven gear jointly form a medium channel for the lubricating medium to flow, the driven rod has an inlet communicating the medium channel and the storage space, and the driven gear has at least one outlet communicating with the medium channel on an engagement surface thereof.

[0005] Optionally, the first rod body and the second rod body are connected through a one-way bearing.

[0006] Optionally, the medium passage comprises a first passage arranged in the first rod body and a second passage arranged in the second rod body, the first rod body is coaxially connected to the outer ring of the one-way bearing, the second rod body is coaxially connected to the inner ring of the one-way bearing, and the first passage and the second passage are communicated through the space inside the inner ring of the one-way bearing in the axial direction, the first passage is communicated with the inlet, and the second passage is communicated with the outlet.

[0007] Optionally, a threaded segment is arranged on the first rod body and threadedly connected with the push plate, the inlet is located between the threaded segment and the second rod body, and a spiral vane is arranged on the first rod body between the inlet and the threaded segment, the spiral vane is arranged in the axial direction of the first rod body and used for conveying the lubricating medium into the inlet.

[0008] Optionally, the inlet is configured as a strip-shaped hole extending in the axial direction of the first rod body, and the number of the inlets is multiple and arranged at intervals in the circumferential direction of the first rod body.

[0009] Optionally, the lubricating device further comprises a driven mechanism and an elastic return member, the housing is movably connected to the mounting frame in the axial direction of the driven rod, the driven mechanism comprises a bracket connected to the housing and a roller arranged on the bracket, the roller can be partially inserted into the gap between two adjacent teeth of the gear ring from the end surface of the gear ring, and the driven mechanism is configured to drive the housing and the driven gear to move away from the gear ring in the axial direction of the driven rod through the roller when the mounting frame rotates with the frame in the circumferential direction of the gear ring, and the elastic return member is used to provide elastic force for moving the housing, the driven gear and the driven mechanism towards the gear ring in the axial direction of the driven rod.

[0010] Optionally, the number of the driven mechanisms is multiple and arranged at intervals.

[0011] Optionally, the mounting frame comprises two mounting plates arranged at intervals in the axial direction of the driven rod, the two mounting plates are both provided with a first through hole for the housing to slide through, the outer wall of the housing is provided with a support plate extending radially outward, the support plate is provided with at least one guide rod extending in the axial direction of the driven rod, and the mounting plate is provided with a second through hole in sliding connection with the guide rod.

[0012] Optionally, the two mounting plates comprise a first mounting plate located between the support plate and the driven gear, and a second mounting plate located on the side of the support plate away from the first mounting plate, and the elastic return member is a spring and has two ends respectively abutting against the support plate and the second mounting plate.

[0013] Optionally, the number of springs is the same as the number of guide rods, and the springs are sleeved on the corresponding guide rods.

[0014] Through the above technical solution, this disclosure only requires utilizing the power generated by the wind turbine itself during pitch or yaw, i.e., the power output from the motor (yaw motor or pitch motor). As the motor and frame (main frame or auxiliary frame) move circumferentially along the gear ring (yaw gear ring or pitch gear ring), the lubrication device moves synchronously with the frame. The driven gear meshes with the gear ring, driving the driven rod to rotate. The threaded transmission between the driven rod and the push plate achieves the compression and discharge of the lubricating medium. Therefore, this disclosure requires no additional power, enabling passive, manual operation, and the application of grease to the gear meshing parts using the power generated by the wind turbine's automatic yaw or pitch. Furthermore, since the pitch or yaw motor stops working when the wind turbine does not need to pitch or yaw, i.e., it does not output power, the lubrication device remains stationary relative to the gear ring, and the push plate does not move, thus preventing the discharge of lubricating medium and reducing waste.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the engagement between the lubrication device and the gear ring provided in an exemplary embodiment of this disclosure;

[0018] Figure 2 This is a schematic diagram of the structure of the lubrication device provided in an exemplary embodiment of this disclosure;

[0019] Figure 3 This is an exploded view of the lubrication device provided in an exemplary embodiment of this disclosure;

[0020] Figure 4 This is a schematic diagram of the cooperation between the driven rod, the push plate, and the helical blade provided in an exemplary embodiment of this disclosure;

[0021] Figure 5 This is a schematic diagram of the engagement of the driven gear and the second rod provided in an exemplary embodiment of this disclosure;

[0022] Figure 6 This is a cross-sectional view of the driven gear and the second rod provided in an exemplary embodiment of this disclosure.

[0023] Reference Signs List

[0024] 1 - housing; 101 - cavity; 102 - storage space; 103 - chute; 110 - support plate; 111 - guide rod; 2 - driven rod; 201 - medium channel; 202 - inlet; 210 - first rod body; 211 - first channel; 212 - threaded section; 213 - helical blade; 220 - second rod body; 221 - second channel; 3 - push plate; 301 - sliding block; 4 - driven gear; 401 - outlet; 5 - one-way bearing; 6 - mounting frame; 610 - mounting plate; 611 - first through hole; 612 - second through hole; 613 - first mounting plate; 614 - second mounting plate; 7 - driven mechanism; 701 - bracket; 702 - roller; 8 - elastic return member; 9 - gear ring. DETAILED DESCRIPTION

[0025] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0026] In the present disclosure, the orientation words such as "inner, outer" used without the opposite description refer to the inner and outer relative to the component or contour itself. In addition, it should be noted that the terms such as "first, second" used are for distinguishing one element from another element, and do not have sequential and important meanings. In addition, in the description with reference to the drawings, the same reference signs represent the same elements in different drawings.

[0027] The variable pitch and yaw of the wind turbine generator set is mainly adopted by the gear meshing power transmission, so that the set is variable pitch or yaw.

[0028] For example, the yaw system is one of the essential systems of the horizontal axis wind turbine. The yaw system has two main functions. One is to cooperate with the control system of the wind turbine to keep the wind wheel of the wind turbine in the windward state, so as to fully utilize the wind energy and improve the power generation efficiency of the wind turbine. The other is to provide the necessary locking torque to ensure the safe operation of the wind turbine. The yaw system of the wind turbine is generally divided into active yaw system and passive yaw system. The passive yaw system refers to the yaw mode that relies on wind force to complete the wind wheel yawing action through related mechanisms, and the common ones are tail rudder, rudder wheel and downwind. The active yaw refers to the yaw mode that uses electric power or hydraulic drag to complete the wind action, and the common one is the gear drive form. For grid-connected wind turbines, the gear drive form of active yaw is usually adopted. Among them, the yaw system realizes the yaw of the wind turbine through the meshing transmission of the yaw motor and the yaw gear ring. For example, the yaw system includes a yaw motor arranged on a main frame, a yaw driving gear is arranged on an output shaft of the yaw motor, and the yaw driving gear is meshed with a yaw gear ring. When the yaw motor drives the yaw driving gear to rotate, the yaw gear ring remains stationary, and the yaw motor moves along the circumferential direction of the yaw gear ring, thereby realizing the yaw of the wind turbine.

[0029] In addition, the pitch system changes the size of the blade pitch angle installed on the hub to change the angle of attack of the blade section to adapt to the change of wind speed, thereby changing the blade characteristics and greatly improving the stress state of the blade and the whole machine. The pitch system realizes the rotation of the blade along the longitudinal axis direction through the meshing transmission of the pitch motor and the pitch gear ring, thereby changing the angle of attack of the airflow to the blade. For example, the pitch system includes a pitch motor arranged on a sub-frame (or a pitch frame), a pitch driving gear is arranged on an output shaft of the pitch motor, and the pitch driving gear is meshed with a pitch gear ring. When the pitch motor drives the pitch driving gear to rotate, the pitch gear ring remains stationary, and the pitch motor moves along the circumferential direction of the pitch gear ring, thereby realizing the pitch.

[0030] Among them, the lubricating device must be arranged in the yaw system and the pitch system to ensure good lubrication between the yaw driving gear and the yaw gear ring or between the pitch driving gear and the pitch gear ring.

[0031] In the related art, an active type gear face lubricator is usually used to maintain the oil on the meshing part of the gear (yaw gear ring or pitch gear ring). The existing lubricator mainly has the following problems:

[0032] 1. An additional power is needed to drive the lubricator to apply oil to the gear, for example, an additional power is needed to squeeze the lubricating oil in the lubricator to the meshing surface of the gear, which will generate additional energy consumption;

[0033] 2. The amount of grease is usually controlled by time, and the grease is outputted when the propeller or the yaw is not changed, which causes waste of the grease;

[0034] 3. The wind turbine generator set with long service life has no grease lubricating machine, and the grease is applied manually, which is time-consuming and laborious.

[0035] Therefore, the present disclosure provides a lubricating device which can realize passive lubrication of the gear ring meshing surface of the wind turbine generator set without manual operation and by using the power generated by the automatic yaw or variable pitch of the wind turbine generator set. The wind turbine generator set comprises a rack, a motor, a driving gear arranged on an output shaft of the motor, and a gear ring 9 connected with the driving gear in meshing mode. The motor is arranged on the rack, and the motor can move synchronously with the rack along the circumferential direction of the gear ring 9 through the meshing transmission of the driving gear and the gear ring 9.

[0036] In one embodiment, the rack is the main rack, the motor is the yaw motor, the driving gear is the yaw driving gear, and the gear ring 9 is the yaw gear ring, so that the present disclosure can be applied to the yaw system of the wind turbine generator set to lubricate the yaw gear ring, thereby ensuring good lubrication between the yaw gear ring and the yaw driving gear. According to the actual design of the wind turbine generator set, the yaw gear ring can be an inner gear ring or an outer gear ring, which is not limited in the present disclosure.

[0037] In another embodiment, the rack is the auxiliary rack, the motor is the variable pitch motor, the driving gear is the variable pitch driving gear, and the gear ring 9 is the variable pitch gear ring, so that the present disclosure can be applied to the variable pitch system of the wind turbine generator set to lubricate the variable pitch gear ring, thereby ensuring good lubrication between the variable pitch gear ring and the variable pitch driving gear. According to the actual design of the wind turbine generator set, the variable pitch gear ring can be an inner gear ring or an outer gear ring, which is not limited in the present disclosure.

[0038] The lubricating device comprises a shell 1, a driven rod 2, a push plate 3, a driven gear 4 and a mounting frame 6 for being fixed to a rack to be able to move synchronously along the circumference of a gear ring 9; the shell 1 comprises a cavity 101 and is connected to the mounting frame 6; the driven rod 2 is rotatably connected to the shell 1 around its own axis, and has a first rod body 210 extending into the shell 1 and a second rod body 220 located outside the shell 1; the push plate 3 is coaxially sleeved and threadedly connected to the first rod body 210, and is movably connected to the inner wall surface of the cavity 101 along the axial direction of the first rod body 210; the push plate 3 and the shell 1 jointly enclose a storage space 102 for storing lubricating medium in the cavity 101; the driven gear 4 is coaxially connected to the second rod body 220 and is used for engaging with the gear ring 9; wherein the driven rod 2 and the inside of the driven gear 4 jointly form a medium channel 201 for the lubricating medium to flow, the driven rod 2 has an inlet 202 communicating with the medium channel 201 and the storage space 102, and at least one outlet 401 communicating with the medium channel 201 is arranged on the engaging surface of the driven gear 4.

[0039] Through the above arrangement, when the wind turbine unit is pitched or yawed, the motor drives the driving gear to rotate, and since the driving gear engages with the gear ring 9 and the gear ring remains stationary, the motor and the rack will move along the circumference of the gear ring 9, thereby driving the shell 1 to move synchronously along the circumference of the gear ring 9, and in the process of movement, since the driven gear 4 engages with the gear ring 9, the driven gear 4 will rotate around its own axis, thereby driving the driven rod 2 to rotate, and since the push plate 3 is threadedly connected to the first rod body 210 of the driven rod 2 and is movably connected to the inner wall surface of the cavity 101 along the axial direction of the first rod body 210, the rotation of the driven rod 2 can be converted into the linear motion of the push plate 3 in the axial direction of the first rod body 210, thereby the push plate 3 can extrude the lubricating medium stored in the storage space 102 into the medium channel 201 through the inlet 202, the lubricating medium can flow through the medium channel 201 and flow out through the outlet 401 on the engaging surface of the driven gear 4, thereby lubricating the engaging surface of the gear ring 9.

[0040] In summary, the present disclosure only needs to utilize the power generated by the wind turbine generator itself during the process of variable pitch or yaw, i.e. the power output by the motor (yaw motor or variable pitch motor), so that when the motor and the rack (main rack or auxiliary rack) move along the circumference of the gear ring 9 (yaw gear ring or variable pitch gear ring), the lubricating device is driven to move synchronously with the rack, and through the meshing of the driven gear 4 and the gear ring 9, the rotation of the driven rod 2 is driven, and through the threaded transmission mode of the driven rod 2 and the push plate 3, the extrusion and discharge of the lubricating medium are realized. Thus, the present disclosure can realize the work of lubricating the gear meshing part passively, without manual operation and using the power generated by the automatic yaw or variable pitch of the wind turbine generator itself. In addition, when the wind turbine generator does not need to be pitched or yawed, the variable pitch motor or yaw motor stops working, i.e. does not output power, so that the lubricating device is stationary relative to the gear ring 9, and the push plate does not act, so that the lubricating medium is not discharged, thereby reducing the waste of lubricating medium.

[0041] In some embodiments, with reference to Figure 1 and Figure 2 It is shown that the inner wall of the cavity 101 is provided with a chute 103 extending in parallel with the axial direction of the driven rod 2, and the push plate 3 is provided with a sliding block 301 in sliding connection with the chute 103, so that when the driven rod 2 rotates, the rotation of the push plate 3 is limited through the cooperation of the chute 103 and the sliding block 301, thereby realizing the movement of the push plate 3 in the axial direction of the driven rod 2. In another embodiment, a sliding rail extending in parallel with the axial direction of the driven rod 2 can also be provided on the inner wall of the cavity 101, and a chute 103 cooperating with the sliding rail can be provided on the push plate 3, which is not specifically limited by the present disclosure.

[0042] In some specific embodiments, with reference to Figures 1 to 3 It is shown that the first rod body 210 and the second rod body 220 are connected through the one-way bearing 5. Through this connection mode, for example, when the driven gear 4 drives the second rod body 220 to rotate in the forward direction, the first rod body 210 can rotate in the same direction as the second rod body 220 through the one-way bearing 5, and when the driven gear 4 drives the second rod body 220 to rotate in the reverse direction, the first rod body 210 will not rotate with the second rod body 220 due to the action of the one-way bearing 5. Alternatively, the first rod body 210 can also rotate in the reverse direction synchronously with the second rod body 220, but not in the forward direction, which means that the one-way bearing 5 can allow the first rod body 210 to rotate in one direction with the second rod body 220, which is not specifically limited by the present disclosure. Among them, the forward and reverse directions are relative, for example, with reference to Figure 1 It is shown that when viewed from the top of the drawing (or from the second rod body 220 towards the driven gear 4), the counterclockwise rotation of the driven gear 4 around its own axis direction is defined as forward rotation, and the clockwise rotation is defined as reverse rotation.

[0043] Taking the example of the first rod 210 rotating forward with the second rod 220, as mentioned in the above specific embodiment, the first rod 210 is threadedly connected to the push plate 3. When the driven gear 4 drives the second rod 220 to rotate in the opposite direction, the first rod 210 does not rotate with it. Therefore, the push plate 3 does not move relative to the first rod 210, and the lubricating medium will not be squeezed into the medium channel by the push plate 3. Consequently, the lubricating medium is not discharged when the driven gear 4 rotates in the opposite direction. However, when the driven gear 4 drives the second rod 220 to rotate forward, the first rod 210 rotates synchronously in the forward direction. Through the threaded connection between the first rod 210 and the push plate 3, the push plate 3 can move along the axial direction of the first rod 210 and toward the second rod 220 to squeeze the lubricating medium. This allows the lubricating medium to be discharged when the driven gear 4 rotates in the forward direction, thus lubricating the gear ring 9. In this way, when the lubrication equipment rotates with the frame in the preset direction of the gear ring 9, it discharges the lubricating medium to grease the gear ring 9. When the lubrication equipment rotates with the frame in the opposite direction of the preset direction of the gear ring 9, it does not discharge the lubricating medium, so as to save the use of lubricating medium and avoid waste.

[0044] In some other embodiments, any one-way mechanism with one-way rotation function, such as a ratchet, a Geneva wheel, a cam, or an escapement wheel, can be used to replace the one-way bearing 5, and this disclosure does not limit this.

[0045] In some specific implementations, refer to Figures 3 to 6 As shown, the medium channel 201 includes a first channel 211 disposed in the first rod 210 and a second channel 221 disposed in the second rod 220. The first rod 210 is coaxially connected to the outer ring of the one-way bearing 5, and the second rod 220 is coaxially connected to the inner ring of the one-way bearing 5. The first channel 211 and the second channel 221 are connected through the space inside the inner ring of the one-way bearing 5 in the axial direction. The first channel 211 is connected to the inlet 202, and the second channel 221 is connected to the outlet 401. With this arrangement, the lubricating medium flows from the first channel 211 and the second channel 221 to the outlet 401 to lubricate the meshing surface of the gear ring 9. Simultaneously, the medium channel 201 also includes a receiving cavity disposed inside the driven gear 4 and communicating with the second channel 221. The outlet 401 communicates with the receiving cavity. This arrangement increases the storage space for the lubricating medium. The second rod 220 can be a hollow rod structure, and the end face of one end of the second rod 220 can be welded to the side of the driven gear 4. The number of outlets 401 can be multiple and spaced apart on the tooth surfaces of the driven gear 4. For example, in this disclosure, two outlets 401 are spaced apart on each tooth surface of the driven gear 4. In this way, the lubricating medium can be applied to each tooth surface of the gear ring 9 through multiple outlets 401, resulting in a more uniform application of the lubricating medium to each tooth surface.

[0046] In some embodiments, referring to Figure 4 As shown, the first rod body 210 is provided with a threaded segment 212 which is threadedly connected with the push plate 3, and the inlet 202 is located between the threaded segment 212 and the second rod body 220, and the first rod body 210 is provided with a helical blade 213 which is located between the inlet 202 and the threaded segment 212, and the helical blade 213 is arranged along the axial direction of the first rod body 210 for conveying the lubricating medium into the inlet 202. Through the screw conveying of the push plate 3 and the helical blade 213, the lubricating medium is conveniently extruded and smoothly conveyed towards the inlet 202. For example, when the first rod body 210 rotates forward with the second rod body 220, the helical blade 213 can be configured to convey the lubricating medium along the axial direction of the driven rod 2 from the side where the second rod body 220 is located towards the side where the inlet 202 is located. When the second rod body 220 rotates reversely, the first rod body 210 and the helical blade 213 thereon do not rotate.

[0047] In some embodiments, referring to Figure 3 and Figure 4 As shown, the inlet 202 is configured as a strip-shaped hole which extends along the axial direction of the first rod body 210; the number of the inlets 202 is multiple and is arranged at intervals along the circumferential direction of the first rod body 210, so as to increase the flow area of the lubricating medium. For example, in the present disclosure, two strip-shaped holes are arranged at intervals along the circumferential direction of the first rod body 210, and the two strip-shaped holes are symmetrically arranged about the axial direction of the first rod body 210, so as to increase the flow area of the lubricating medium.

[0048] In some embodiments, referring to Figures 1 to 3As shown, the lubricating device further comprises a driven mechanism 7 and an elastic return member 8, the housing 1 is movably connected to the mounting frame 6 along the axial direction of the driven rod 2, the driven mechanism 7 comprises a bracket 701 connected to the housing 1 and a roller 702 arranged on the bracket 701, the roller 702 is capable of being partially inserted into the gap between two adjacent teeth of the gear ring 9 from the end surface of the gear ring 9, and the driven mechanism 7 is configured to drive the housing 1 and the driven gear 4 to move away from the gear ring 9 along the axial direction of the driven rod 2 through the roller 702 when the mounting frame 6 rotates along the circumferential direction of the gear ring 9, and the elastic return member 8 is used to provide the elastic force for moving the housing 1, the driven gear 4 and the driven mechanism 7 along the axial direction of the driven rod 2 towards the gear ring 9. Since the roller 702 can be partially inserted into the gap between two adjacent teeth of the gear ring 9, when the housing 1 moves along the circumferential direction of the gear ring 9, the roller 702 will be forced to be pushed out of the gap between the two adjacent teeth, and then the roller 702 will be inserted into the gap between another two adjacent teeth again under the action of the elastic return member, in this way, the housing 1 and the driven gear 4 can be driven to move reciprocally along the axial direction of the driven rod 2, that is, when the driven gear 4 is engaged with the gear ring 9 to move along the circumferential direction of the gear ring 9 and rotate along the central axis of the driven gear, the driven gear 4 can also move reciprocally along the axial direction of the driven rod 2, through this movement, the outlet 401 on the driven gear 4 will move reciprocally with the driven gear 4, and then the lubricating medium can be evenly applied to the meshing surface of the gear ring 9.

[0049] In the present disclosure, the end of the housing 1 close to the driven gear 4 can be configured as a funnel, this arrangement can flow the lubricating medium conveyed by the spiral blade 213 into the inlet 202 through the angle of the funnel itself, which enhances the flowability of the lubricating medium, so as to avoid the accumulation of part of the lubricating medium due to the dead angle in the housing 1.

[0050] In some embodiments, referring to Figures 1 to 3 As shown, the number of the driven mechanisms 7 can be multiple and arranged at intervals. By arranging multiple driven mechanisms 7, the stability of the driven mechanisms 7 supporting the housing 1 can be improved. The present disclosure does not specifically limit the number of the driven mechanisms 7 arranged, for example, referring to Figure 1 As shown, the number of the driven mechanisms 7 can be two and respectively located on both sides of the driven gear 4.

[0051] In some embodiments, referring to Figures 1 to 3As shown, the mounting frame 6 includes two mounting plates 610 arranged along the axial direction of the driven rod 2, and each of the two mounting plates 610 is provided with a first through hole 611 for slidingly penetrating the shell 1, the outer wall of the shell 1 is provided with a support plate 110 extending radially outward, the support plate 110 is provided with at least one guide rod 111 extending parallel to the axial direction of the driven rod 2, and the mounting plate 610 is provided with a second through hole 612 in sliding connection with the guide rod 111. Through this connection mode, the first through hole 611 on the two spaced mounting plates 610 can limit the reciprocating movement of the shell 1 along the axial direction of the driven rod 2, and the sliding connection of the guide rod 111 with the second through hole 612 can limit the relative rotation of the shell 1 and the first through hole 611, so that the shell 1 will not rotate when the driven rod 2 rotates, and the push plate 3 can move along the axial direction of the driven rod 2 to perform the smearing of the lubricating medium.

[0052] In some specific embodiments, with reference to Figures 1 to 3 As shown, the two mounting plates 610 include a first mounting plate 613 located between the support plate 110 and the driven gear 4, and a second mounting plate 614 located on the side of the support plate 110 away from the first mounting plate 613, and the elastic return member 8 is a spring and abuts against the support plate 110 and the second mounting plate 614 at two ends. In this way, when the shell 1 moves along the axial direction of the driven rod 2 towards the second mounting plate 614, the elastic return member 8 abutting between the support plate 110 and the second mounting plate 614 will be compressed, so that the elastic return member 8 will provide a elastic force for moving the shell 1 and the driven mechanism 7 towards the gear ring 9, so as to always abut the roller 702 against the end face of the gear ring 9 or insert the roller 702 into the gap between adjacent two teeth.

[0053] In some specific embodiments, with reference to Figures 1 to 3 As shown, the number of elastic return members 8 is the same as the number of guide rods 111, and the elastic return member 8 is sleeved on the corresponding guide rod 111. The number of guide rods 111 and elastic return members 8 can be multiple, which is not limited in the present disclosure. For example, with reference to Figure 1 As shown, the guide rod 111 connected to the support plate 110 has three, and is arranged along the circumferential direction of the support plate 110, and each guide rod 111 is provided with an elastic return member 8. Through this arrangement, the multiple elastic return members 8 abutting against the second mounting plate 614 and the support plate 110 can more stably connect the shell 1 to the mounting frame 6, and reduce the shaking of the shell 1 when moving along the axial direction of the driven rod 2. In addition, it should be noted that in the present disclosure, the elastic return member 8 can be a spring, rubber, sponge, latex or any other elastic return member with elasticity, which is not limited in the present disclosure.

[0054] The present disclosure exemplarily describes the working process of the lubricating device, which can include the following steps, for example:

[0055] The filling step S1: when the gear ring 9 needs to be lubricated, the push plate 3 can be removed first, and then the lubricating medium is poured into the storage space 102 in the shell 1, and then the push plate 3 is installed, wherein the first rod body 210 can be manually rotated to drive the push plate 3 to move out of the cavity of the shell 1, so that the push plate 3 can be disassembled;

[0056] The lubricating step S2: after the lubricating medium is filled into the storage space 102, when the gear ring 9 is yawing during the yawing or the variable pitch of the external wind turbine generator, the motor drives the driving gear to rotate. Since the driving gear is engaged with the gear ring 9 and the gear ring 9 remains stationary, the motor and the rack will move along the circumference of the gear ring 9, thereby synchronously moving the shell 1 along the circumference of the gear ring 9.

[0057] Taking the case that the first rod body 210 can follow the positive rotation of the second rod body 220 as an example, when the second rod body 220 is positively rotated by the driven gear 4, the first rod body 210 is synchronously positively rotated. Through the threaded connection between the first rod body 210 and the push plate 3, the push plate 3 can be moved along the axial direction of the first rod body 210 and towards the second rod body 220, so as to extrude the lubricating grease. At this time, through the cooperation with the spiral blade 213, the lubricating medium stored in the storage space 102 can be extruded into the medium channel 201 through the inlet 202, and the lubricating medium can flow through the medium channel 201 and flow out through the outlet 401 on the meshing surface of the driven gear 4, thereby lubricating the meshing surface of the gear ring 9.

[0058] When the shell 1 moves along the circumference of the gear ring 9, the rollers 702 will be forced to be pushed out of the gap between the adjacent two teeth, and then the rollers 702 will be inserted into the gap between the other two adjacent teeth again under the action of the elastic return member 8. In this way, the shell 1 and the driven gear 4 can be reciprocally moved along the axial direction of the driven rod 2, that is, when the driven gear 4 is engaged with the gear ring 9 to move along the circumference of the gear ring 9 and rotate along the central axis of the driven gear 4, the driven gear 4 can also reciprocally move along the axial direction of the driven rod 2. Through this movement mode, the outlet 401 on the driven gear 4 will reciprocally move with the driven gear 4, thereby more uniformly applying the lubricating medium to the meshing surface of the gear ring 9.

[0059] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0060] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0061] Furthermore, the various embodiments of the present disclosure can be arbitrarily combined with each other unless they contradict each other, and it should be understood that the same should be construed as being included in the disclosure of the present disclosure.

Claims

1. A lubricating apparatus for a wind power generator unit, the wind power generator unit comprising a frame, a motor, a driving gear provided on an output shaft of the motor, and a ring gear engaged with the driving gear, the motor being provided on the frame, the motor being able to move in synchronization with the frame along a circumferential direction of the ring gear by engagement transmission of the driving gear with the ring gear, characterized in that, The lubricating device comprises: a mounting frame for being fixed to the rack; a housing comprising a cavity and being connected to the mounting frame; a driven rod rotatably connected to the housing about its own axis, the driven rod having a first rod body extending into the housing and a second rod body located outside the housing; a push plate coaxially sleeving and being threadedly connected to the first rod body, and the push plate being movably connected to an inner wall surface of the cavity along an axial direction of the first rod body, the push plate and the housing jointly defining a storage space for storing lubricating medium in the cavity; a driven gear coaxially connected to the second rod body and being used for engaging with the gear ring; wherein the driven rod and the driven gear jointly form a medium channel for the lubricating medium to flow, the driven rod has an inlet communicating with the medium channel and the storage space, and the driven gear has at least one outlet communicating with the medium channel on an engaging surface thereof; the lubricating device further comprises a driven mechanism and an elastic return member, the housing is movably connected to the mounting frame along an axial direction of the driven rod, the driven mechanism comprises a bracket connected to the housing and a roller provided on the bracket, the roller is capable of being partially inserted into a gap between two adjacent teeth of the gear ring from an end surface of the gear ring, and the driven mechanism is configured to drive the housing and the driven gear to move away from the gear ring along the axial direction of the driven rod by the roller when the mounting frame rotates along a circumferential direction of the gear ring with the rack, and the elastic return member is used to provide an elastic force for moving the housing, the driven gear and the driven mechanism towards the gear ring along the axial direction of the driven rod.

2. The lubricating apparatus according to claim 1, characterized by The first rod body and the second rod body are connected by a one-way bearing.

3. The lubricating apparatus according to claim 2, characterized by The medium channel comprises a first channel provided in the first rod body and a second channel provided in the second rod body, the first rod body is coaxially connected to an outer ring of the one-way bearing, the second rod body is coaxially connected to an inner ring of the one-way bearing, and the first channel and the second channel are communicated by a space inside the inner ring of the one-way bearing in the axial direction, the first channel is communicated with the inlet, and the second channel is communicated with the outlet.

4. The lubricating apparatus according to claim 2, characterized by A threaded segment is provided on the first rod body and is threadedly connected with the push plate, the inlet is located between the threaded segment and the second rod body, and a helical blade is provided on the first rod body between the inlet and the threaded segment, the helical blade is arranged along the axial direction of the first rod body and is used for conveying the lubricating medium into the inlet.

5. The lubricating apparatus according to claim 1, characterized by The inlet is configured as a strip-shaped hole extending along the axial direction of the first rod body; The number of the inlets is multiple and is arranged at intervals along a circumferential direction of the first rod body.

6. The lubricating apparatus of claim 1, wherein The number of the driven mechanisms is multiple and is arranged at intervals.

7. The lubricating apparatus according to claim 1, characterized by The mounting frame comprises two mounting plates arranged axially apart from each other along the driven rod, each of the two mounting plates is provided with a first through hole for the shell to slide through, an outer wall of the shell is provided with a support plate extending radially outward, the support plate is provided with at least one guide rod extending parallel to the axial direction of the driven rod, and the mounting plate is provided with a second through hole in sliding connection with the guide rod.

8. The lubricating apparatus according to claim 7, characterized by The two mounting plates comprise a first mounting plate located between the support plate and the driven gear, and a second mounting plate located on a side of the support plate away from the first mounting plate, and the elastic return member is a spring and the two ends thereof abut against the support plate and the second mounting plate respectively.

9. The lubricating apparatus according to claim 8, characterized by The number of the springs is the same as the number of the guide rods, and the spring is sleeved on the corresponding guide rod.

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