Oil collecting device, lubricating system, wind generating set and control method

Abstract

The invention relates to an oil collecting device, a lubricating system, a wind generating set and a control method, and the oil collecting device comprises a base which is configured to be connected with a part to be subjected to oil collection; the collecting container is arranged on the base, and the collecting container is provided with a containing cavity and an opening communicated with the containing cavity; the locking component is arranged on the base and comprises more than two locking units, the collecting container is provided with locking interfaces corresponding to the locking units respectively, and the locking component and the collecting container are switched between a first matching state and a second matching state; in the first matching state, each locking unit partially extends into the corresponding locking interface so as to fix the relative position of the collecting container and the base; and in the second matching state, each locking unit is separately arranged from the locking interface, and the collecting container has a motion freedom degree relative to the base. The oil collecting device provided by the invention can meet the oil collecting requirement, and is good in stability and high in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and particularly to an oil collecting device, a lubrication system, a wind turbine generator set and a control method. Background Art

[0002] Bearings can enable two cooperating components to have rotational freedom with respect to each other and are widely used. During the use of bearings, it is usually necessary to inject lubricating oil, grease, etc. between their inner and outer rings to reduce bearing wear and improve the service life of the bearings.

[0003] Taking the wind power field as an example, bearings are an indispensable part of wind turbine generator sets. For example, they can be widely used in the pitch control system of wind turbine generator sets. In existing wind turbine generator sets, the pitch bearing raceway lubrication system usually has an oil collecting device to collect the excess grease in the pitch bearing.

[0004] However, due to defects in the structural design of existing oil collecting devices, the device for collecting grease is prone to falling off, resulting in grease leakage, and the self-stability of the oil collecting device is poor, affecting the safety of oil collection. Summary of the Invention

[0005] Embodiments of the present invention provide an oil collecting device, a lubrication system, a wind turbine generator set and a control method. The oil collecting device can meet the requirements for grease collection, and has good stability and high safety.

[0006] On the one hand, according to an embodiment of the present invention, an oil collecting device is proposed, including: a base configured to be connected to a component to be oil-collected; a collecting container disposed on the base, the collecting container having a receiving cavity and an opening communicating with the receiving cavity; a locking member disposed on the base and including more than two locking units, the collecting container being respectively provided with locking interfaces corresponding to each locking unit, and the locking member and the collecting container being switched between a first mating state and a second mating state; in the first mating state, each locking unit partially extends into the corresponding locking interface to fix the relative position of the collecting container and the base; in the second mating state, each locking unit is separately disposed away from the locking interface, and the collecting container has a degree of freedom of movement relative to the base.

[0007] On the other hand, according to an embodiment of the present invention, a lubrication system for a bearing is provided. The bearing has a circumferential lubrication channel, a plurality of grease extraction holes communicating with the lubrication channel, and a plurality of grease injection holes. The lubrication system includes: the above-mentioned oil collecting device, the base being connected to the bearing, and the opening communicating with a part of the grease extraction holes, so that at least part of the grease in the lubrication channel flows into the receiving cavity; a grease regulating member communicating with the receiving cavity of the collecting container, the grease regulating member being configured to extract the grease in the receiving cavity.

[0008] In another aspect, a wind turbine generator according to an embodiment of the present invention includes the above lubrication system.

[0009] In yet another aspect, a control method according to an embodiment of the present invention is used for the above lubrication system, and includes:

[0010] Obtain the index parameters of the grease in the accommodating cavity of the collection container and the impurity content of the grease in the lubrication channel, where the index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease;

[0011] In response to the index parameters reaching the first threshold range and the impurity content being less than the safety threshold, control the grease regulating component to extract the grease in the accommodating cavity.

[0012] According to yet another aspect of the embodiment of the present invention, the control method further includes:

[0013] Obtain the pressure values at multiple points of the lubrication channel;

[0014] In response to any one of the pressure values at multiple points exceeding the maximum allowable pressure value, stop greasing the lubrication channel;

[0015] In response to the pressure values at multiple points being all less than the system initial pressure value, grease the lubrication channel at the first greasing rate;

[0016] In response to the pressure values at multiple points being all between the system initial pressure value and the maximum allowable pressure value, grease the lubrication channel at the second greasing rate, where the second greasing rate is less than the first greasing rate.

[0017] According to the oil collection device, lubrication system, wind turbine generator and control method provided by the embodiment of the present invention, the oil collection device includes a base, a collection container and a locking component. The base can be used to connect with oil collection components such as bearings. The collection container is arranged on the base to connect with the component to be oil-collected, and it can collect the excess grease of the component to be oil-collected through an opening. The locking component includes more than two locking units. The collection container is respectively provided with locking interfaces corresponding to each locking unit, and there is a first matching state and a second matching state between the locking component and the collection container. When it is necessary to fix the collection container on the component to be oil-collected, the collection container can be placed on the base, so that the locking component and the collection container are switched from the second state to the first matching state, so that each locking unit respectively extends into the corresponding locking interface to fix the relative position of the collection container and the base, thereby ensuring the stability of the connection between the collection container and the base, avoiding the collection container from falling off relative to the component to be oil-collected, reducing the probability of leakage of the collected grease, and ensuring the overall stability and safety of the oil collection device. Description of the Drawings

[0018] The features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0019] Figure 1 is a schematic structural diagram of a wind turbine generator according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the cooperation between an oil collecting device and a bearing according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the overall structure of an oil collecting device according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a partial structure of an oil collecting device according to an embodiment of the present invention;

[0023] Figure 5 is Figure 4 a top view of the structure shown;

[0024] Figure 6 is a schematic diagram of the structure of a collection container according to an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of the structure of a locking member and a collection container in a first mating state according to an embodiment of the present invention;

[0026] Figure 8 is a schematic diagram of the structure of a locking member and a collection container in a second mating state according to an embodiment of the present invention;

[0027] Figure 9 is a schematic diagram of the overall structure of an oil collecting device according to another embodiment of the invention;

[0028] Figure 10 is a schematic diagram of the overall structure of an oil collecting device according to yet another embodiment of the invention;

[0029] Figure 11 is a schematic diagram of the overall structure of an oil collecting device according to still another embodiment of the invention;

[0030] Figure 12 is a schematic diagram of the structure of a lubrication system according to an embodiment of the present invention;

[0031] Figure 13 is a flowchart of a control method according to an embodiment of the present invention.

[0032] 1 - Oil collecting device;

[0033] 10 - Base; 11 - Base plate; 12 - Support plate;

[0034] 20 - Collection container; 21 - Accommodation cavity; 22 - Opening; 23 - Locking interface; 24 - Drain outlet;

[0035] 30 - Locking component; 31 - Locking unit; 311 - Linkage assembly; 311a - Adapter rod; 311b - Limiting rod; 312 - Locking piece; 313 - Limiting space; 314 - Connecting piece; 315 - Elastic piece;

[0036] 40 - First collector; 41 - Oil level sensor;

[0037] 50 - Connecting ear;

[0038] 2 - Grease adjustment component; 201 - Liposuction pump; 202 - Lubrication pump;

[0039] 3 - Detection component; 301 - Spectral and electrochemical sensor; 302 - Acquisition module; 303 - Data analysis module;

[0040] 4 - Controller;

[0041] 5 - Second collector; 501 - Oil pressure sensor

[0042] 6 - Bearing; 601 - Liposuction hole; 602 - Grease injection hole;

[0043] 100 - Tower; 200 - Machine nacelle; 300 - Generator; 400 - Impeller; 410 - Hub; 420 - Blade.

[0044] In the drawings, like parts are designated by like reference numerals. The drawings are not drawn to actual scale. Detailed implementation manners

[0045] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0046] The orientation terms used in the following description are all the directions shown in the figures, and do not limit the specific structures of the oil collecting device, lubrication system, wind turbine generator set and control method of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] As Figure 1 shown, an embodiment of the present application provides a wind turbine generator set, including a wind turbine foundation, a tower 100, a nacelle 200, a generator 300, and an impeller 400. The tower 100 is connected to the wind turbine foundation, the nacelle 200 is arranged at the top of the tower 100, the generator 300 is arranged in the nacelle 200, and it can be located inside the nacelle 200, and of course, it can also be located outside the nacelle 200. The impeller 400 includes a hub 410 and a plurality of blades 420 arranged on the hub 410. Each blade 420 can be rotationally connected to the hub 410 through a pitch bearing to adapt to the oncoming wind in different directions and different wind speeds, and improve the utilization rate of wind energy. The whole impeller 400 can be connected to the rotor of the generator 300 through its hub 410. When the wind acts on the blade 420, it drives the whole impeller 400 and the rotor of the generator 300 to rotate, so as to convert wind energy into electrical energy, and further meet the power generation requirements of the wind turbine generator set.

[0048] During the use of the pitch bearing, it is usually necessary to inject lubricating oil, grease, etc. between its inner ring and outer ring to reduce the wear of the pitch bearing and improve the service life of the bearing.

[0049] For the existing wind turbine generator sets, their pitch bearing raceway lubrication systems usually are provided with an oil collecting device to collect the excess grease in the pitch bearing. However, due to the defects in the structural design of the existing oil collecting device, it is connected to the pitch bearing by hanging or other means, so that the device for collecting grease is easy to fall off, resulting in grease leakage, and the stability of the oil collecting device itself is poor, affecting the safety of oil collection.

[0050] Based on this, an embodiment of the present application also provides an oil collecting device, which can meet the requirements of grease collection, and has good stability and high safety. The oil collecting device 1 can be used in the field of wind power technology and connected to the bearing 6 in the pitch system. Of course, it can also be used for the oil collection of other components, such as the bearing 6 in the yaw system in the field of wind power, or parts in other fields that need to use grease and need to collect grease.

[0051] As Figures 2 to 8As shown in the figure, an oil collecting device 1 provided by an embodiment of the present application includes a base 10, a collecting container 20, and a locking member 30. The base 10 is configured to be connected to the component to be oil collected. The collecting container 20 is disposed on the base 10. The collecting container 20 has a receiving cavity 21 and an opening 22 communicating with the receiving cavity 21. The locking member 30 is disposed on the base 10 and includes more than two locking units 31. The collecting container 20 is respectively provided with a locking interface 23 corresponding to each locking unit 31. The locking member 30 and the collecting container 20 are switched between a first mating state and a second mating state. In the first mating state, each of the locking units 31 partially extends into the corresponding locking interface 23 to fix the relative position of the collecting container 20 and the base 10. In the second mating state, each of the locking units 31 is separately separated from the locking interface 23, and the collecting container 20 has a degree of freedom of movement relative to the base 10.

[0052] The shape of the base 10 can match at least a part of the shape of the component to be oil collected. Taking the component to be oil collected as a bearing 6 as an example, the base 10 can be arc-shaped to adapt to the structure of the inner ring or the outer ring of the bearing 6, ensuring to be in contact with and connected to the bearing 6. The connection between the base 10 and the component to be oil collected can be connected to each other by means such as bolt fastening, and can also be connected by means such as welding. Optionally, connection holes are provided on the base 10 and connected to the bearing 6 through fasteners such as bolts.

[0053] The collecting container 20 includes, but is not limited to, a container having a receiving cavity 21 and an opening 22. The oil can enter the receiving cavity 21 through the opening 22. The locking interface 23 provided on the collecting container 20 can be formed by removing a part of the material from the wall of the collecting container 20. For example, it can be in the form of a groove, a plug hole, etc. When in the form of a groove, it can be a circular groove, a polygonal groove, or an L-shaped groove, etc. The locking interface 23 and the receiving cavity 21 are independently arranged from each other and do not affect the collection of oil in the receiving cavity 21.

[0054] The locking units 31 included in the locking member 30 can be two, three, or more. The collecting container 20 can be respectively provided with a locking interface 23 corresponding to each of the locking units 31. The locking units 31 can be locked and separated from the locking interface 23 by means of pneumatic, hydraulic drive, electric drive, or mechanical drive. The locking member 30 and the base 10 can be in a form of fixed connection. Of course, a rotational connection or other means can also be adopted, and specifically, it can be selected according to the locking method between the locking unit 31 and the locking interface 23.

[0055] An oil collecting device 1 provided by an embodiment of the present application, its base 10 can be used to connect with oil collecting components such as a bearing 6, a collecting container 20 is arranged on the base 10 to connect with the component to be oil collected, and it can collect the excess grease of the component to be oil collected through an opening 22. The locking component 30 includes more than two locking units 31. The collecting container 20 is respectively provided with a locking interface 23 corresponding to each locking unit 31, and there is a first mating state and a second mating state between the locking component 30 and the collecting container 20. When it is necessary to fix the collecting container 20 on the component to be oil collected, the collecting container 20 can be placed on the base 10, so that the locking component 30 and the collecting container 20 are switched from the second mating state to the first mating state, and each locking unit 31 extends into the corresponding locking interface 23 respectively, so that the collecting container 20 and the base 10 are relatively fixed, thereby ensuring the stability of the connection between the collecting container 20 and the base 10, avoiding the collecting container 20 from falling off relative to the component to be oil collected, reducing the probability of leakage of the collected grease, and ensuring the overall stability and safety of the oil collecting device 1.

[0056] At the same time, since the locking component 30 and the collecting container 20 can be switched between the first mating state and the second mating state, when the collecting container 20 is full of grease or the collecting container 20 is damaged, etc., the locking component 30 and the collecting container 20 can be switched from the first mating state to the second mating state to unlock the collecting container 20, so that the collecting container 20 can be separated from the base 10 to pour out the oil or replace the collecting container 20.

[0057] Continue to refer to Figures 3 to 8 As shown, in some alternative embodiments, for the oil collecting device 1 provided by an embodiment of the present application, the locking unit 31 includes a link assembly 311 and a locking member 312. A plurality of link assemblies 311 enclose a limiting space 313 for accommodating the collecting container 20. The locking member 312 is connected to the link assembly 311. The collecting container 20 enters the limiting space 313 from the side where the locking member 312 is located and pushes at least part of each locking unit 31, so that the locking member 312 extends into the corresponding locking interface 23 and the link assembly 311 abuts against the collecting container 20, and the locking component 30 and the collecting container 20 are switched to the first mating state.

[0058] For the oil collecting device 1 provided by an embodiment of the present application, through the above settings, when the collecting container 20 enters the limiting space 313, it can automatically push at least part of each locking unit 31, so that the locking member 312 extends into the corresponding locking interface 23 and the link assembly 311 abuts against the collecting container 20, and jointly limits the collecting container 20 with the locking member 312, stably limits the collecting container 20 in the accommodating cavity 21, improves the stability of the collecting container 20 relative to the oil collecting device 1, and can provide automatic pushing of the locking unit 31 for locking, with a fast corresponding speed and reduced locking difficulty.

[0059] In some alternative embodiments, for the oil collecting device 1 provided by an embodiment of the present application, the locking member 312 includes a locking rod, and the locking interface 23 is recessed from the outer wall surface of the collecting container 20 towards the inside of the collecting container 20, and the shape of the locking interface 23 matches the shape of the locking rod.

[0060] With the above arrangement, when the locking member 30 and the collecting container 20 are switched to the first mating state, the locking rod can be smoothly inserted into the locking interface 23 and can limit the relative position of the collecting container 20 and the base 10, thereby ensuring the overall stability of the oil collecting device 1.

[0061] Optionally, in the first mating state, the locking interface 23 can also accommodate part of the link assembly 311, so that part of the link assembly 311 can also be inserted into the locking interface 23, improving the stability of the relative position between the collecting container 20 and the base.

[0062] In some alternative embodiments, for the oil collecting device 1 provided by an embodiment of the present application, the locking units 31 can be arranged in pairs, and the locking units 31 arranged in pairs are symmetrically distributed with respect to each other. The link assembly 311 includes a transfer rod 311a and a limiting rod 311b. The limiting rod 311b is arranged on one side of the transfer rod 311a in its own length direction and intersects the transfer rod 311a. The locking member 312 is arranged on the other side of the transfer rod 311a in the length direction and extends towards the limiting space 313. The link assemblies 311 arranged in pairs enclose a limiting space 313.

[0063] For the oil collecting device 1 provided by an embodiment of the present application, when used for the bearing 6, the locking units 31 arranged in pairs can be spaced apart in the circumferential direction of the bearing 6, optionally spaced and symmetrically distributed. One end of the locking member 312 of each locking unit 31 having a locking rod can be cantilevered in the radial direction of the bearing 6. The collecting container 20 can move into the limiting space 313 along the radial direction of the bearing 6 from the side where the limiting rod 311b is located. During the entry process, at least part of each locking unit 31 is pushed to make the locking rod extend into the corresponding locking interface 23 and the link assembly 311 abuts against the collecting container 20, and the locking member 30 and the collecting container 20 are switched to the first mating state. With the above structural form of the oil collecting device 1, the locking unit 31 arranged in pairs can symmetrically clamp and lock the collecting member, ensuring uniform force on the collecting part and improving its stability performance.

[0064] In some optional embodiments, the oil collecting device 1 provided in the above embodiments of the present application, its base 10 may include a stacked base plate 11 and a support plate 12, and the support plate 12 may be connected to the base plate 11 through a connecting structure such as a connecting rod and a connecting plate. The base plate 11 can be used to connect with the oil-collecting component, and may be optionally provided with a connecting hole connected by a fastener such as a bolt. The shape of the base plate 11 may be an arc-shaped plate to facilitate matching with the shape of the oil-collecting component, and the locking component 30 may be arranged on the support plate 12, and the shape of the support plate 12 may be a flat plate to facilitate the installation of the locking component 30. In the arrangement direction of the base plate 11 and the support plate 12, the locking component 30 may be arranged to protrude from the support plate 12 on the side away from the base plate 11, and its connecting rod assembly 311 may be connected to the support plate 12, and the side where the locking component 312 is located may be cantilevered.

[0065] Optionally, the locking interface 23 arranged on the outer periphery of the collection container 20 can be an L-shaped groove, and the locking piece 312 and the transfer rod 311a are arranged to intersect in an L shape. In the first mating state, the locking piece 312 and the transfer rod 311a can at least partially extend into the L-shaped groove to ensure the stability of the collection container 20.

[0066] In some optional embodiments, in an oil collecting device 1 provided by an embodiment of the present application, the connecting rod assembly 311 is rotatably connected to the base 10 via a connecting piece 314, the locking piece 312 is fixedly connected to the transfer rod 311a, and the limiting rod 311b is used to receive the thrust of the collection container 20 and drive the locking piece 312 to rotate with the connecting piece 314 as the rotation center, so that the locking piece 312 can be inserted into the locking interface 23 or separated from the locking interface 23.

[0067] The connecting member 314 includes but is not limited to a pin, a pin shaft with a limiting structure, etc.

[0068] When the locking member 312 includes a locking rod, the locking rod and the transfer rod 311 a can be fixedly connected.

[0069] The collection container 20 can be inserted into the limiting space 313 from the side where the locking piece 312 is located. During the insertion process, the limiting rod 311b can be pushed. After the limiting rod 311b receives the thrust given by the collection container 20, it can drive the locking piece 312 to rotate with the connecting piece 314 as the rotation center, so that the locking piece 312 gathers to the side where the collection container 20 is located and is inserted into the locking interface 23.

[0070] In some alternative embodiments, the oil collecting device 1 may further include a connecting ear 50 disposed on the base 10. The connecting rod assembly 311 may be stacked on the connecting ear 50, and the connecting member 314 is inserted into the connecting ear 50 and the connecting rod assembly 311, so that the connecting rod assembly 311 rotates relative to the base 10. The provision of the connecting ear 50 facilitates meeting the rotational connection requirement between the connecting rod assembly 311 and the base 10.

[0071] With the above arrangement, the oil collecting device 1 provided by an embodiment of the present application facilitates the self-locking of the collecting container 20 during movement through a self-pushing and self-locking manner. The self-locking process is simple and the locking strength is high. When it is necessary to switch to the second mating state, the limiting rod 311b can be pushed in the reverse direction or the transfer rod 311a can be pulled in the reverse direction manually or by means of a driving member, so that the transfer rod 311a drives the locking member 312 to rotate in the reverse direction with the connecting member 314 as the rotation center and separate from the locking interface 23, completing the switching from the first mating state to the second mating state.

[0072] It can be understood that the above self-locking manner of the collecting container 20 is only an alternative embodiment.

[0073] As Figure 9 shown, in some embodiments, the connecting rod assembly 311 may also be fixedly connected to the base 10, and the locking member 312 and the transfer rod 311a are elastically connected by an elastic member 315. The elastic member 315 is used to drive the locking member 312 to extend into the locking interface 23.

[0074] With the above arrangement, when the collecting container 20 is pushed into the limiting cavity by one end of the locking member 312, it can first squeeze the elastic member 315. When the locking interface 23 moves to the corresponding position of the locking member 312, under the pushing of the elastic member 315, the locking member 312 will be pushed into the locking interface 23 to lock the collecting container 20. When it is necessary to switch to the second mating state, the collecting container 20 is pulled in the reverse direction, and under a relatively large external force, the elastic member 315 is compressed, so that the locking member 312 is separated from the locking interface 23.

[0075] It can be understood that the oil collecting device 1 provided by the above embodiments of the present application is exemplified by the self-locking manner of the collecting container 20 during movement, and is not limited to the above manner.

[0076] As Figure 10As shown, in some embodiments, the connecting rod assembly 311 can also be fixedly connected to the base 10, and the locking member 312 is fixedly connected to the adapter rod 311a. The locking member 312 includes a telescopic cylinder, and at least a part of the cylinder rod of the telescopic cylinder matches the shape of the locking interface 23. After the collection container 20 moves to the limit position in the limit space 313, by controlling the telescopic cylinder to extend, a part of the telescopic cylinder extends into the locking interface 23 to lock the collection container 20, which can also improve the stability of the oil collection device 1. When it is necessary to switch to the second matching state, by controlling the telescopic cylinder to retract and separate from the locking interface 23, the disassembly and assembly of the collection container 20 are realized.

[0077] Of course, as Figure 11 As shown, in some embodiments, the locking member 30 can include a plurality of locking units 31. Each locking unit includes a telescopic cylinder, which can be connected to the base 10. At least a part of the cylinder rod of the telescopic cylinder matches the shape of the locking interface 23. After the collection container 20 moves to the limit position in the limit space 313, by controlling the telescopic cylinder to extend, a part of the telescopic cylinder extends into the locking interface 23 to lock the collection container 20, which can also improve the stability of the oil collection device 1. When it is necessary to switch to the second matching state, by controlling the telescopic cylinder to retract and separate from the locking interface 23, the disassembly and assembly of the collection container 20 are realized.

[0078] Optionally, the telescopic cylinder includes, but is not limited to, one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder.

[0079] Continuing to refer to Figure 6 As shown, in some alternative embodiments, the oil collection device 1 further includes a first collector 40. The first collector 40 is disposed in the collection container 20 and is configured to obtain the index parameters of the grease in the accommodation cavity 21. The index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease.

[0080] For the oil collection device 1 provided by an embodiment of the present application, by providing the first collector 40, at least one of the volume, height, and mass of the grease in the accommodation cavity 21 can be obtained, so as to determine whether the oil in the accommodation cavity 21 reaches a predetermined height, so as to determine whether it is necessary to pump out or pour out the grease in the collection container 20 from the accommodation cavity 21.

[0081] In some alternative embodiments, for the oil collection device 1 provided by an embodiment of the present application, the first collector 40 includes a plurality of oil level sensors 41. Each oil level sensor 41 is embedded in the wall of the collection container 20, and the plurality of oil level sensors 41 are arranged at intervals around the opening 22 in the circumferential direction of the collection container 20.

[0082] The number of the oil level sensors 41 can be three, four or more, and the multiple oil level sensors 41 can be arranged at intervals and evenly in the circumferential direction of the collection container 20.

[0083] For the oil collection device 1 provided in an embodiment of the present application, the first collector 40 includes multiple oil level sensors 41, which can accurately obtain the height of the grease in the accommodation cavity 21, facilitating the judgment of whether it is necessary to extract or pour out the grease in the collection container 20 from the accommodation cavity 21.

[0084] Optionally, the multiple oil level sensors 41 can be connected by cables, and the cables can be at least partially buried in the wall of the collection container 20. By providing an outlet hole at the top of the collection device, the cables can be connected to devices such as the controller 4 to feed back the obtained height information of the grease to the controller 4.

[0085] In some optional embodiments, for the oil collection device 1 provided in an embodiment of the present application, in order to facilitate the extraction of the grease in the collection container 20, a discharge port 24 can be provided on the bottom wall of the collection container 20.

[0086] As Figure 12 shown, on the other hand, an embodiment of the present application further provides a lubrication system for a bearing 6. The bearing 6 has a circumferential lubrication channel, a plurality of oil extraction holes 601 communicating with the lubrication channel, and a plurality of grease injection holes 602. The lubrication system includes: the oil collection device 1 provided in each of the above embodiments and a grease adjustment component 2. The base 10 of the oil collection device 1 is connected to the bearing 6, and the opening 22 communicates with a part of the number of oil extraction holes 601, and can be communicated through a connection structure such as a pipeline, so that at least part of the grease in the lubrication channel flows into the accommodation cavity 21. The grease adjustment component 2 communicates with the accommodation cavity 21 of the collection container 20, and the grease adjustment component 2 is configured to extract the grease in the accommodation cavity 21.

[0087] For the lubrication system provided in an embodiment of the present application, since it includes the oil collection device 1 and the grease adjustment component 2 provided in each of the above embodiments, it can collect the grease overflowing from the bearing 6 through the oil collection device 1, realizing the collection of the grease. Moreover, the relative positions of the collection container 20 of the oil collection device 1 and the base 10 are fixed, which can prevent the collection container 20 from falling off relative to the bearing 6, reducing the probability of leakage of the collected grease, and ensuring the overall stability and safety of the oil collection device 1. At the same time, the setting of the grease adjustment component 2 enables the grease in the collection container 20 to be sucked out in time when it reaches a predetermined height, avoiding the occurrence of leakage and pollution phenomena caused by the accommodation cavity 21 of the collection container 20 being filled with grease and unable to be discharged in time.

[0088] In some optional embodiments, for the lubrication system provided by an embodiment of the present application, when the oil collecting device 1 further includes a first collector 40, the first collector 40 is configured to obtain the index parameters of the grease in the accommodation cavity 21, and the index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease. The lubrication system further includes a detection component 3 and a controller 4. The detection component 3 is communicated with a partial number of oil extraction holes 601 and is configured to obtain the impurity content of the grease in the lubrication channel. The controller 4 is configured to: when the index parameters reach the first threshold range and the impurity content is less than the safety threshold, control the grease regulating component to extract the grease in the accommodation cavity 21.

[0089] For the existing lubrication systems, such as the lubrication system of the bearings of a wind turbine generator, there is no grease content feedback mechanism, and it is impossible to judge the grease condition in the raceway. The lubrication system provided by an embodiment of the present application can detect the index parameters of the grease in the accommodation cavity 21 by setting the first collector 40 and the detection component 3, and obtain the impurity content of the grease in the lubrication channel of the bearing 6 through the detection component 3. When the index parameters reach the first threshold range and the impurity content is less than the safety threshold, control the grease regulating component to extract the grease in the accommodation cavity 21 and recycle the grease in the oil collecting bottle, thus saving the cost of grease materials.

[0090] In some optional embodiments, for the lubrication system provided by an embodiment of the present application, the controller 4 is further configured to: when the impurity content exceeds the safety threshold, that is, when the grease is unqualified, trigger a warning message. Optionally, when the lubrication system is used for a wind turbine generator, the triggered warning message can be transmitted to the main controller of the fan.

[0091] Through the above settings, when the impurity content exceeds the safety threshold and a warning message is triggered, it is necessary to conduct a detailed inspection of the damage condition of the raceway of the bearing 6 and clean the grease in the collection container 20 to avoid the grease with an excessive impurity content being re-extracted and reused by the grease regulating component 2. For example, by switching the locking component 30 and the collection container 20 to the second matching state, the collection container 20 can be separated from the locking component 30 to facilitate the cleaning of the grease in the oil collecting bottle.

[0092] Exemplarily, the first collector 40 may include an oil level sensor 41 capable of measuring the height of the oil, and the detection component 3 may include a spectrum and electrochemical sensor 301, a collection module 302, a data analysis module 302, etc. The spectrum and electrochemical sensor 301 may be used to obtain the impurity content of the grease in the lubrication channel of the bearing 6, such as the content of iron. The collection module 302 is configured to receive the impurity content data, and the data analysis module 302 is configured to compare the impurity content data with a safety threshold and transmit the comparison result to the controller 4. The controller 4 controls the grease regulating component 2 to extract the grease in the accommodation cavity 21 or trigger a warning message according to the comparison result and in combination with the index parameters of the grease in the accommodation cavity 21 fed back by the oil level sensor 41.

[0093] The first preset threshold range may be optionally selected as 0.9H - H, where H is the total height of the accommodation cavity 21 in the collection container 20. The safety threshold may be optionally selected as the iron content being greater than 8000 mg / kg. Of course, this is an optional example, and specifically, it can be determined according to the impurities that may be generated by the materials such as the bearing 6 and the impurity content that may damage the raceway.

[0094] In some optional embodiments, the lubrication system provided by an embodiment of the present application further includes a second collector 5. The second collector 5 is connected to at least some of the grease injection holes 602. The second collector 5 is configured to obtain the pressure value in the lubrication channel. The grease regulating component 2 is further configured to communicate with at least some of the grease injection holes 602. The controller 4 is configured to control the grease injection amount of the grease regulating component 2 to inject grease into the lubrication channel according to the pressure value.

[0095] Conventional lubrication systems do not have a corresponding grease content feedback mechanism. When the grease addition amount is too much, the oil collection device 1 often fills up with grease and cannot be replaced in time, resulting in the collection container 20 falling off, grease leakage, and pollution of the environment where the bearing 6 is located. Taking the pitch bearing of a wind turbine as an example, it will pollute the internal environment and components in the hub 410. Seriously, it will burst the raceway seal ring of the bearing 6. For units without a fairing, it will also pollute the external environment of the unit. When the grease addition amount is too little to cover the grease consumption or discharge speed, or when the grease distribution in the raceway is seriously uneven, the raceway will be severely worn, etc., which has an adverse impact on the service life of the bearing 6 raceway. Usually, the whole machine factory will solve the problem of uneven grease distribution by periodically forcing the pitch, but periodic forced pitching has high requirements for wind speed and has the adverse effects of triggering small wind shutdowns and affecting power generation.

[0096] However, the lubrication system provided by an embodiment of the present application, by setting the second collector 5 and connecting it to the grease injection holes on the bearing 6, can obtain the pressure value in the lubrication channel. The controller 4 is configured to control the grease injection amount of the grease regulating component 2 to inject grease into the lubrication channel according to the pressure value, avoiding damage to the bearing 6 caused by too much or too little injected grease, improving the safety of lubricating the bearing 6, and ensuring the service life of the bearing 6.

[0097] In some alternative embodiments, for the lubrication system provided by an embodiment of the present application, the second collector 5 includes a plurality of oil pressure sensors 501, each oil pressure sensor 501 communicates with one of the grease injection holes 602 and obtains the pressure value of the area where it is located. The controller 4 is configured to:

[0098] In response to any one of the pressure values obtained by the plurality of oil pressure sensors 501 exceeding the maximum allowable pressure value, control the grease regulating component 2 to stop adding grease to the lubrication channel.

[0099] In response to the pressure values obtained by the plurality of oil pressure sensors 501 all being less than the system initial pressure value, control the grease regulating component 2 to add grease to the lubrication channel at a first grease addition rate.

[0100] In response to the pressure values obtained by the plurality of oil pressure sensors 501 all being between the system initial pressure value and the maximum allowable pressure value, control the grease regulating component 2 to add grease to the lubrication channel at a second grease addition rate, where the second grease addition rate is less than the first grease addition rate.

[0101] The number of the oil pressure sensors 501 can be two, three or more. The plurality of oil pressure sensors 501 can be arranged at intervals in the circumferential direction of the bearing 6, and can be optionally arranged at intervals and evenly.

[0102] The maximum allowable pressure value can be understood as the maximum pressure value that the inner raceway of the bearing 6 can withstand when the bearing 6 leaves the factory. The system initial pressure value can be understood as the initial pressure in the system after the lubrication system is connected to the bearing 6, and the specific value can be set according to the model of the bearing 6. The system initial pressure value is less than the maximum allowable pressure value.

[0103] For the lubrication system provided by an embodiment of the present application, by making the second collector 5 include a plurality of oil pressure sensors 501, each oil pressure sensor 501 communicates with one of the grease injection holes 602 and obtains the pressure value of the area where it is located, a grease content feedback mechanism can be established. By comparing and calculating the internal oil pressure of the raceway with the system initial pressure value and the maximum allowable pressure value, the controller 4 controls the lubricating pump 202 to select an appropriate grease content control program to perform the grease injection action, ensuring that the grease content and pressure in the bearing 6 are appropriate and improving the safety of the lubrication system.

[0104] In some alternative embodiments, for the lubrication system provided by an embodiment of the present application, the controller 4 is further configured to: when the relative error between the pressure values obtained by any two oil pressure sensors 501 is greater than a preset threshold, output a maintenance signal, and the maintenance signal includes a signal for controlling the relative rotation of the inner ring and the outer ring of the bearing 6 or a signal for replacing the grease in the lubrication channel.

[0105] Taking one of the pressure values detected by two of the oil pressure sensors 501 as the first pressure value and the other as the second pressure value, if the ratio of the difference between the first pressure value and the second pressure value to the second pressure value is greater than a preset threshold, a maintenance signal is output, and the preset threshold can optionally be greater than or equal to twenty percent.

[0106] Taking the lubrication system for a wind turbine generator as an example, through the above settings, the bearings 6 for pitch control are designed with multiple grease content feedback devices. When the relative error of the pressure values obtained by any two oil pressure sensors 501 is greater than the preset threshold, a maintenance signal is output. For example, the main control system of the 300 groups of wind turbines 300 can be controlled to perform a large pitch change operation, otherwise the large pitch change operation is not performed regularly. Through the above settings, the whole machine factory does not need to solve the problem of uneven grease distribution by regularly forcing pitch change, which is conducive to achieving the goal of low-cost operation and maintenance.

[0107] In some alternative embodiments, the grease regulating component 2 may include a fat extraction pump 201 and a lubricating pump 202. One end of the fat extraction pump 201 can communicate with the accommodation cavity 21 of the collection container 20, and one end can communicate with the lubricating pump 202. The output end of the lubricating pump 202 can communicate with the annular lubrication channel. The fat extraction pump 201 can pump the grease collected in the collection container 20 to the lubricating pump 202, and then the lubricating pump 202 transports it to the annular lubrication channel for reuse.

[0108] The detection component 3, the oil pressure sensor 501, etc. can be respectively inserted into the corresponding fat extraction holes 601 and grease injection holes 602 and thread-connected to the bearing 6. The lubricating pump 202 and the collection container 20 can also communicate with the annular lubrication channel through different connection holes.

[0109] On the other hand, an embodiment of the present application also provides a wind turbine generator, including the lubrication system provided in the above embodiments. The wind turbine generator may include a pitch bearing, a yaw bearing, etc. The pitch bearing and the yaw bearing can cooperate with the lubrication system to achieve their own lubrication.

[0110] The wind turbine generator provided by an embodiment of the present application, since it includes the lubrication system provided in the above embodiments, can achieve the lubrication of its own pitch bearing, yaw bearing, etc. The overall stability and safety of the oil collection device 1 are good, and the risk of oil leakage can be reduced. And the established grease feedback mechanism can inject and extract grease as needed, improve the service life of the bearing, and reduce the operation and maintenance cost.

[0111] As Figure 13 shown, in some alternative embodiments, an embodiment of the present application also provides a control method for the above lubrication system, including:

[0112] S110. Obtain the index parameters of the grease in the accommodating cavity 21 of the collection container 20 and the impurity content of the grease in the lubrication channel. The index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease.

[0113] S120. In response to the index parameters reaching the first threshold range and the impurity content being less than the safety threshold, control the grease regulating component 2 to extract the grease in the accommodating cavity 21.

[0114] The control method provided by an embodiment of the present application can detect the index parameters of the grease in the accommodating cavity 21 and the impurity content of the grease in the lubrication channel. When the index parameters reach the first threshold range and the impurity content is less than the safety threshold, control the grease regulating component 2 to extract the grease in the accommodating cavity 21 and recycle the grease in the oil collecting bottle, saving the cost of grease materials.

[0115] In some optional embodiments, the control method further includes: when the impurity content exceeds the safety threshold, trigger a warning message.

[0116] Through the above settings, when the impurity content exceeds the safety threshold and a warning message is triggered, it is necessary to conduct a detailed inspection of the damage of the raceway of the bearing 6 and remove the grease in the oil collecting bottle, so as to avoid the grease with an excessive impurity content from being re-extracted and reused in the grease regulating component 2.

[0117] In some optional embodiments, the control method further includes:

[0118] Obtain the pressure values at multiple points in the lubrication channel. If any of the pressure values at multiple points exceeds the maximum allowable pressure value, stop greasing the lubrication channel. If the pressure values at multiple points are all less than the system initial pressure value, grease the lubrication channel at the first greasing rate. If the pressure values at multiple points are all between the system initial pressure value and the maximum allowable pressure value, grease the lubrication channel at the second greasing rate, where the second greasing rate is less than the first greasing rate.

[0119] The control method provided by an embodiment of the present application, through the above settings, can establish a grease content feedback control mechanism. By comparing and calculating the internal oil pressure of the raceway with the system initial pressure value and the maximum allowable pressure value, the controller 4 controls the lubricating pump 202 to select an appropriate grease content control program to perform the grease injection action, ensuring that the grease content and pressure in the bearing 6 are appropriate and improving the safety of the lubrication system.

[0120] In some optional embodiments, the control method further includes that when the relative error of the pressure values obtained at any two circumferential positions of the bearing 6 is greater than the preset threshold, output a maintenance signal, and the maintenance signal includes a signal for controlling the relative rotation of the inner ring and the outer ring of the bearing 6 or a signal for replacing the grease in the lubrication channel.

[0121] Taking the control method applied to the lubrication system of a wind turbine generator as an example, with the above settings, when the relative error of the pressure values obtained at any two locations in the circumferential direction of the bearing 6 is greater than a preset threshold, a maintenance signal is output. For example, the main control system of the wind turbine generator can be controlled to perform a large pitch change operation, otherwise the large pitch change operation is not regularly performed. Through the above settings, the wind turbine manufacturer does not need to solve the problem of uneven grease distribution by regularly forcing the pitch change, which is conducive to achieving the goal of low-cost operation and maintenance.

[0122] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An oil collecting device, characterized in that, Comprising: A base configured to be connected to an oil collecting component to be collected; A collecting container disposed on the base, the collecting container having a receiving cavity and an opening communicating with the receiving cavity; A locking component disposed on the base and including more than two locking units, the collecting container is respectively provided with a locking interface corresponding to each of the locking units, and the locking component and the collecting container are switched between a first mating state and a second mating state; In the first mating state, each of the locking units respectively extends into the corresponding locking interface provided, to fix the relative position of the collecting container and the base; In the second mating state, each of the locking units is separately separated from the locking interface, and the collecting container has a degree of freedom of movement relative to the base.

2. The oil collecting device according to claim 1, wherein The locking unit includes a link assembly and a locking member, and a plurality of the link assemblies enclose a limiting space for accommodating the collecting container. The locking member is connected to the link assembly. The collecting container enters the limiting space from the side where the locking member is located and pushes at least a part of each of the locking units, so that the locking member extends into the corresponding locking interface and the link assembly abuts against the collecting container, and the locking component and the collecting container are switched to the first mating state.

3. The oil collecting device according to claim 2, wherein The locking member includes a locking rod, the locking interface is recessed from the outer wall surface of the collecting container towards the inside of the collecting container, and the shape of the locking interface matches the shape of the locking rod.

4. The oil collecting device according to claim 2, characterized in that, The locking units are arranged in pairs, and the locking units arranged in pairs are symmetrically distributed with respect to each other. The link assembly includes a transfer rod and a limiting rod. The limiting rod is disposed on one side of the transfer rod in its own length direction and intersects with the transfer rod. The locking member is disposed on the other side of the transfer rod in the length direction and extends towards the limiting space. The link assemblies arranged in pairs enclose the limiting space.

5. The oil collecting device according to claim 4, characterized in that, The link assembly and the base are rotatably connected through a connecting member, the locking member and the transfer rod are fixedly connected, and the limiting rod is used to receive the thrust of the collecting container and drive the locking member to rotate around the connecting member as the rotation center, so that the locking member is inserted into the locking interface or separated from the locking interface.

6. The oil collecting device according to claim 4, characterized in that The link assembly is fixedly connected to the base, the locking member and the transfer rod are elastically connected through an elastic member, and the elastic member is used to drive the locking member to extend into the locking interface; Or, the link assembly is fixedly connected to the base, the locking member and the transfer rod are fixedly connected, the locking member includes a telescopic cylinder, and at least a part of the cylinder rod of the telescopic cylinder matches the shape of the locking interface.

7. The oil collecting device according to any one of claims 1 to 6, characterized in that The oil collecting device further includes a first collector, the first collector is disposed on the collecting container, and the first collector is configured to obtain index parameters of the grease in the receiving cavity, and the index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease.

8. The oil collecting device according to claim 7, characterized in that, The first collector includes a plurality of oil level sensors, each of the oil level sensors being embedded in the wall of the collection container, and the plurality of oil level sensors being spaced apart around the circumference of the collection container with respect to the opening.

9. A lubrication system for a bearing, the bearing having a circumferential lubrication passage, a plurality of oil extraction holes communicating with the lubrication passage, and a plurality of grease injection holes, characterized in that, The lubrication system includes: The oil collection device according to any one of claims 1 to 6, wherein the base is connected to the bearing, and the opening is in communication with a partial number of the fat extraction holes, so that at least part of the grease in the lubrication channel flows into the accommodation cavity; A grease regulating component, which is in communication with the accommodation cavity of the collection container, and the grease regulating component is configured to extract the grease in the accommodation cavity.

10. The lubrication system according to claim 9, wherein The oil collection device further includes a first collector, which is configured to obtain index parameters of the grease in the accommodation cavity, and the index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease; The lubrication system further includes a detection component and a controller, the detection component is in communication with a partial number of the fat extraction holes and is configured to obtain the impurity content of the grease in the lubrication channel, and the controller is configured to: when the index parameters reach a first threshold range and the impurity content is less than the safety threshold, control the grease regulating component to extract the grease in the accommodation cavity.

11. The lubrication system according to claim 10, characterized in that, The controller is further configured to: when the impurity content exceeds the safety threshold, trigger a warning message.

12. The lubrication system according to claim 10, wherein, The lubrication system further includes a second collector, the second collector is connected to at least part of the grease injection holes, the second collector is configured to obtain the pressure value in the lubrication channel, the grease regulating component is further configured to be in communication with at least part of the grease injection holes, and the controller is configured to control the grease injection amount of the grease regulating component to inject grease into the lubrication channel according to the pressure value.

13. The lubrication system according to claim 12, characterized in that, The second collector includes a plurality of oil pressure sensors, each of the oil pressure sensors is in communication with one of the grease injection holes and obtains the pressure value in the area where it is located, and the controller is configured to: In response to any one of the pressure values obtained by the plurality of oil pressure sensors exceeding the maximum allowable pressure value, control the grease regulating component to stop adding grease to the lubrication channel; In response to the pressure values obtained by the plurality of oil pressure sensors all being less than the system initial pressure value, control the grease regulating component to add grease to the lubrication channel at a first grease addition rate; In response to the pressure values obtained by the plurality of oil pressure sensors all being between the system initial pressure value and the maximum allowable pressure value, control the grease regulating component to add grease to the lubrication channel at a second grease addition rate, wherein the second grease addition rate is less than the first grease addition rate.

14. The lubrication system according to claim 13, characterized in that, The controller is further configured to: When the relative error of the pressure values obtained by any two of the oil pressure sensors is greater than a preset threshold, output a maintenance signal, and the maintenance signal includes a signal for controlling the relative rotation of the inner ring and the outer ring of the bearing or a signal for replacing the grease in the lubrication channel.

15. A wind turbine generator, characterized in that, including: The lubrication system according to any one of claims 9 to 14.

16. A control method for a lubrication system as claimed in claim 9, characterized in that, including: Obtain the index parameters of the grease in the accommodating cavity of the collection container and the impurity content of the grease in the lubrication channel, where the index parameters include at least one of the volume of the grease, the height of the grease, and the mass of the grease; In response to the index parameters reaching the first threshold range and the impurity content being less than the safety threshold, control the grease regulating component to extract the grease in the accommodating cavity.

17. The control method according to claim 16, characterized in that, It further includes: Obtain the pressure values at multiple points in the lubrication channel; In response to any one of the pressure values at the multiple points exceeding the maximum allowable pressure value, stop greasing the lubrication channel; In response to the pressure values at the multiple points being less than the system initial pressure value, grease the lubrication channel at the first greasing rate; In response to the pressure values at the multiple points being between the system initial pressure value and the maximum allowable pressure value, grease the lubrication channel at the second greasing rate, where the second greasing rate is less than the first greasing rate.

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