Gear box, lubrication control system and wind generating set

Abstract

The embodiment of the invention provides a gear box, a lubrication control system and a wind generating set, the gear box comprises a planetary system, the planetary system comprises a planet carrier and a plurality of transmission wheel sets arranged on the planet carrier, each transmission wheel set comprises a planet shaft, a planet wheel and a sliding bearing, the planet wheel is arranged on the planet shaft in a sleeving mode, and an annular cavity is formed between the planet wheel and the planet shaft; the planet carrier is provided with an annular cavity, the sliding bearing is arranged in the annular cavity, the planet carrier is provided with a first lubricating flow path, the planet shaft is provided with a second lubricating flow path, the second lubricating flow path is communicated with the first lubricating flow path and the annular cavity, the detection assembly is arranged on at least one of the planet carrier and the planet shaft, and the detection assembly is configured to detect performance parameters of lubricating fluid in a planetary system. The performance parameter includes at least one of a pressure and a flow rate of the lubrication fluid flowing into the second lubrication flow path. The gearbox can meet the transmission requirement, lubricating monitoring of the sliding bearing is perfect, the failure probability of the sliding bearing can be reduced, and then the failure rate of the gearbox is reduced.

Description

Technical Field

[0001] The present application relates to the field of transmission technology, and in particular to a gear box, a lubrication control system and a wind turbine generator set. Background Art

[0002] Gearboxes are widely used, for example in the wind power field and the automotive field. Taking the wind power field as an example, the gearbox, as the core component of a wind turbine, is one of the most important components of the wind turbine transmission chain. Its reliability design is crucial to wind turbines, especially in recent years, as the cost and torque density requirements of wind turbines have increased, the use of sliding bearings inside gearboxes has become a trend.

[0003] Poor lubrication of sliding bearings during use is one of the main factors causing gearbox failures, especially the lubrication of planetary bearings. Since the planetary sliding bearings of the gearbox rotate on their own and revolve with the planet carrier, the existing gearbox only has pressure monitoring at the main oil inlet of the gearbox, and the lubrication monitoring of the sliding bearings is not perfect, the sliding bearing failure probability is high, and the gearbox failure rate is high. Summary of the invention

[0004] The embodiments of the present application provide a gearbox, a lubrication control system and a wind turbine generator set. The gearbox can meet the transmission requirements and has perfect lubrication monitoring of the sliding bearings, which can reduce the failure probability of the sliding bearings and thus reduce the failure rate of the gearbox itself.

[0005] On the one hand, according to an embodiment of the present application, a gearbox is proposed, including: a planetary system, including a planetary carrier and a plurality of transmission wheel groups arranged on the planetary carrier, each transmission wheel group including a planetary shaft, a planetary wheel and a sliding bearing, the planetary shaft is connected to the planetary carrier, the planetary wheel sleeve is arranged on the planetary shaft and an annular cavity is formed between the planetary shaft, the sliding bearing is arranged in the annular cavity, the sliding bearing is arranged around the planetary shaft and rotates with the planetary wheel, a first lubrication flow path is arranged on the planetary carrier, a second lubrication flow path is arranged on the planetary shaft, the second lubrication flow path connects the first lubrication flow path and the annular cavity, and the lubrication fluid entering from the first lubrication flow path is guided to the annular cavity via the second lubrication flow path; a detection component, arranged on at least one of the planetary carrier and the planetary shaft, the detection component is configured to detect performance parameters of the lubrication fluid in the planetary system, the performance parameters including at least one of the pressure and flow rate of the lubrication fluid flowing into the second lubrication flow path.

[0006] According to one aspect of an embodiment of the present application, the detection component includes a pressure detector, a planetary carrier is provided with a mounting hole connected to a first lubrication flow path, the mounting hole is coaxially arranged with at least a portion of the first lubrication flow path, the pressure detector is closed by the mounting hole and connected to the planetary carrier, and the pressure detector is configured to obtain the pressure of the lubrication fluid flowing into the second lubrication flow path.

[0007] According to one aspect of an embodiment of the present application, the pressure detector includes a wireless pressure sensor, and the wireless pressure sensor partially extends into the mounting hole and is detachably connected to the planet carrier.

[0008] According to one aspect of an embodiment of the present application, the first lubrication flow path includes a first channel extending radially along the planetary shaft, the first channel is connected to the second lubrication flow path and the mounting hole, and the mounting hole is coaxially arranged with the first channel and distributed on both sides of the planetary shaft in the radial direction.

[0009] According to one aspect of the embodiment of the present application, an annular groove is arranged on the outer periphery of the planetary shaft around its own axis, the first channel and the mounting hole are arranged radially opposite to and connected to the annular groove, and the inlet of the second lubrication flow path is connected to the annular groove.

[0010] According to one aspect of an embodiment of the present application, the detection component also includes a flow detector, which is arranged in the second lubrication flow path and located between the inlet and the outlet of the second lubrication flow path, and the flow detector is configured to obtain the flow rate of the lubrication fluid flowing into the second lubrication flow path.

[0011] According to one aspect of an embodiment of the present application, a plug-in hole connected to a second lubrication flow path is provided on the planetary shaft, and the plug-in hole extends axially from the axial end face of the planetary shaft to the second lubrication flow path, and the flow detector can extend into the second lubrication flow path through the plug-in hole and be fixedly connected to the planetary shaft, and a sealing piece is provided at one end of the plug-in hole facing away from the second lubrication flow path to seal the plug-in hole.

[0012] According to one aspect of an embodiment of the present application, the second lubrication flow path includes a main channel and an inlet channel and an outlet channel respectively intersecting and connected with the main channel, the main channel extends axially along the planetary shaft, the inlet channel and the outlet channel are axially spaced apart, the inlet channel has an inlet, the outlet channel has an outlet, the plug-in hole is coaxially arranged and connected with the main channel, and the flow detector is located in the main channel.

[0013] According to one aspect of an embodiment of the present application, the gearbox also includes a wireless transmitter, a mounting groove and a threading hole connecting the mounting groove and the second lubrication flow path are provided on the planetary shaft, the wireless transmitter is embedded in the mounting groove and the threading hole is sealed, a cable is provided in the threading hole, and the cable is connected between the flow detector and the wireless transmitter.

[0014] On the other hand, according to an embodiment of the present application, a lubrication control system of a gearbox is provided, the gearbox includes a planetary carrier and a plurality of transmission wheel groups arranged on the planetary carrier, each transmission wheel group includes a planetary shaft, a planetary wheel and a sliding bearing, the planetary shaft is connected to the planetary carrier, the planetary wheel is sleeved on the planetary shaft and an annular cavity is formed between the planetary shaft, the sliding bearing is arranged in the annular cavity, the sliding bearing is arranged around the planetary shaft and rotates with the planetary wheel, a first lubrication flow path is arranged on the planetary carrier, a second lubrication flow path is arranged on the planetary shaft, the second lubrication flow path connects the first lubrication flow path and the annular cavity, and the lubrication fluid entering from the first lubrication flow path is guided to the annular cavity via the second lubrication flow path, characterized in that the lubrication control system includes: a detection component, which can be arranged on at least one of the planetary carrier and the planetary shaft, the detection component is configured to detect the performance parameters of the lubrication fluid in the planetary system, the performance parameters include at least one of the pressure and flow rate of the lubrication fluid flowing into the second lubrication flow path; a controller, which is connected to the detection component signal, and the controller is configured to control the gearbox to switch between a stop state and a running state according to the performance parameters of the lubrication fluid obtained by the detection component.

[0015] According to another aspect of an embodiment of the present application, the controller is configured to control the gearbox to switch between a stop state and a running state according to the performance parameters of the lubricating fluid obtained by the detection component, including:

[0016] The gearbox is switched between a shutdown state and a running state according to the pressure of the lubricating fluid flowing into the second lubricating flow path obtained by the detection component and the flow rate of the lubricating fluid flowing into the second lubricating flow path obtained by the detection component.

[0017] According to another aspect of the embodiment of the present application, the controller is configured to:

[0018] When the pressure of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component exceeds a first preset threshold range;

[0019] If the flow rate of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component within a predetermined time period exceeds a second preset threshold range, the gearbox is controlled to be in a shutdown state; and / or, if the flow rate of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component within a second preset threshold range within a predetermined time period, the gearbox is controlled to be in an operating state.

[0020] According to another aspect of the embodiment of the present application, the controller is configured to: when the flow rate of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component exceeds a second preset threshold range;

[0021] If the pressure of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component is within a first preset threshold range, the control gearbox is in an operating state; and / or, if the pressure of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component exceeds the first preset threshold range, the control gearbox is in a shutdown state.

[0022] In yet another aspect, according to an embodiment of the present application, a wind turbine generator set is provided, comprising the above-mentioned gearbox, or the above-mentioned lubrication control system.

[0023] According to the gearbox, lubrication control system and wind turbine generator set provided by the embodiment of the present application, the gearbox includes a planetary system and a detection component, the planetary system includes a planetary carrier and a plurality of transmission wheel groups, each transmission wheel group includes a planetary shaft and a planetary wheel that rotates with the planetary shaft through a sliding bearing, and the first lubrication flow path, the second lubrication flow path and the annular cavity are arranged, so that the lubrication fluid can be guided to the annular cavity through the first lubrication flow path and the second lubrication flow path to achieve mixing of the sliding bearing. The detection component is arranged on one of the planetary carrier and the planetary shaft, and is configured to detect the performance parameters of the lubrication fluid in the planetary system, and the performance parameters include at least one of the pressure and flow rate of the lubrication fluid flowing into the second lubrication flow path. Since the second lubrication flow path is connected to the annular cavity, the situation of the lubrication fluid at the sliding bearing can be intuitively obtained, and the lubrication monitoring of the sliding bearing can be improved, which can reduce the failure probability of the sliding bearing, and thus reduce the failure rate of the gearbox itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0025] Figure 1 is a structural schematic diagram of a wind turbine generator set according to an embodiment of the present application;

[0026] Figure 2 It is a schematic structural diagram of a gearbox according to an embodiment of the present application;

[0027] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 is a cross-sectional view of a planetary shaft according to an embodiment of the present application;

[0029] Figure 5 It is a cross-sectional view of a planetary shaft according to another embodiment of the present application.

[0030] in:

[0031] 100-Gear box;

[0032] 10-Planetary system;

[0033] 11-planet carrier; 111-first lubrication flow path; 1111-first channel; 112-mounting hole;

[0034] 12- transmission wheel set;

[0035] 121-planetary shaft; 1211-second lubrication flow path; 12111-inlet; 12112-outlet; 1211a-main flow path; 1211b-entry flow path; 1211c-output flow path; 1212-annular groove; 1213-connection hole; 1214-installation groove; 1215-threading hole;

[0036] 122- planetary gear; 123- sliding bearing; 124- annular cavity; 125- blocking member;

[0037] 20-detection component; 21-pressure detector; 22-flow detector; 30-wireless transmitter; 40-cable;

[0038] X-axial direction; Y-radial direction;

[0039] 200-tower; 300-nacelle; 400-impeller; 410-hub; 420-blade; 500-generator.

[0040] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0041] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0042] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structures of the gearbox, lubrication control system and wind turbine generator set of this application. In the description of this application, 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] like Figure 1 As shown, an embodiment of the present application provides a wind turbine generator set, including a wind turbine foundation, a tower 200, a nacelle 300, a generator 500, a gearbox 100 and an impeller 400. The tower 200 is connected to the wind turbine foundation, the nacelle 300 is arranged at the top of the tower 200, the generator 500 is arranged in the nacelle 300, and the impeller 400 includes a hub 410 and a plurality of blades 420 connected to the hub 410, and the hub 410 of the impeller 400 is connected to the rotor of the generator 500 through the gearbox 100. When wind force acts on the blades 420, the impeller 400 can drive the rotor of the generator 500 to rotate relative to the stator through the gearbox 100, so as to convert wind energy into electrical energy, thereby meeting the power generation requirements of the wind turbine generator set.

[0044] The gearbox 100 is a core component of a wind turbine and one of the most important parts of a transmission chain of a wind turbine. Its reliability design is crucial to a wind turbine. In particular, as the cost and torque density requirements of wind turbines have increased in recent years, the use of sliding bearings inside the gearbox 100 has become a trend.

[0045] Poor lubrication of the sliding bearing during use is one of the main factors causing the gearbox 100 to fail, especially the lubrication of the planetary sliding bearing. Since the planetary sliding bearing 123 of the gearbox 100 has a planetary gear 122 that rotates and revolves with the planet carrier 11, the existing gearbox 100 only has pressure monitoring at the main oil inlet of the gearbox 100, and the lubrication monitoring of the sliding bearing is not perfect, the sliding bearing 123 has a high probability of failure, and the gearbox 100 has a high failure rate.

[0046] Based on this, an embodiment of the present application also provides a new gearbox 100, which can be used in the wind turbine generator set provided in the above embodiments and as a component of the wind turbine generator set. Of course, it can also be used as an independent product in other fields to achieve capacity transfer. The gearbox 100 provided in an embodiment of the present application can meet the transmission requirements, and the lubrication monitoring of the sliding bearing 123 is perfect, which can reduce the failure probability of the sliding bearing 123, thereby reducing the failure rate of the gearbox 100 itself.

[0047] like Figures 2 to 4 As shown, a gearbox 100 provided by an embodiment of the present application includes a planetary system 10 and a detection component 20. The planetary system 10 includes a planetary carrier 11 and a plurality of transmission wheel groups 12 arranged on the planetary carrier 11. Each transmission wheel group 12 includes a planetary shaft 121, a planetary wheel 122 and a sliding bearing 123. The planetary shaft 121 is connected to the planetary carrier 11. The planetary wheel 122 is sleeved on the planetary shaft 121 and forms an annular cavity 124 with the planetary shaft 121. The sliding bearing 123 is arranged in the annular cavity 124. The sliding bearing 123 is arranged around the planetary shaft 121 and rotates with the planetary wheel 122. A first lubrication flow path 111 is arranged on the planetary carrier 11, and a second lubrication flow path 1211 is arranged on the planetary shaft 121. The second lubrication flow path 1211 connects the first lubrication flow path 111 and the annular cavity 124. The lubrication fluid entering from the first lubrication flow path 111 is guided to the annular cavity 124 via the second lubrication flow path 1211. The detection component 20 is disposed on at least one of the planetary carrier 11 and the planetary shaft 121 , and is configured to detect performance parameters of the lubricating fluid in the planetary system 10 , including at least one of the pressure and flow rate of the lubricating fluid flowing into the second lubrication flow path 1211 .

[0048] The number of the transmission wheel sets 12 may be three, four or more. The plurality of transmission wheel sets 12 may be spaced and evenly arranged in the circumferential direction of the planet carrier 11 . The plurality of transmission wheel sets 12 may be arranged around a sun gear and mesh with the sun gear.

[0049] The sliding bearing 123 of each transmission wheel group 12 is sleeved on the planetary shaft 121, and the planetary shaft 121 can be connected to the planetary wheel 122 through the sliding bearing 123. Optionally, the sliding bearing 123 can be interference fit with the planetary shaft 121 and clearance fit with the planetary wheel 122, so that the planetary wheel 122 can rotate relative to the planetary shaft 121.

[0050] A first lubrication flow path 111 may be provided on the planet carrier 11 corresponding to each transmission wheel set 12 , and a second lubrication flow path 1211 provided on each planet shaft 121 obtains lubrication fluid through the corresponding first lubrication flow path 111 and guides the lubrication fluid into the annular cavity 124 of the transmission wheel set 12 .

[0051] The detection component 20 can be arranged on the planet carrier 11, or on the planet shaft 121, and of course, can also be partially arranged on the planet carrier 11 and partially arranged on the planet shaft 121. The performance parameter detected by the detection component 20 can include the pressure of the lubricating fluid flowing into the second lubricating flow path 1211, and can also include the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211, and of course, can also include the pressure and flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 at the same time.

[0052] The gearbox 100 provided in one embodiment of the present application can be connected to an external device through the planet carrier 11 and the sun gear to achieve the transmission of kinetic energy. The first lubricating flow path 111, the second lubricating flow path 1211 and the annular cavity 124 are provided, and the lubricating fluid can be guided to the annular cavity 124 through the first lubricating flow path 111 and the second lubricating flow path 1211 to achieve lubrication of the sliding bearing 123. The detection component 20 is provided on at least one of the planet carrier 11 and the planetary shaft 121, and is configured to detect the performance parameters of the lubricating fluid in the planetary system 10, and the performance parameters include at least one of the pressure and flow rate of the lubricating fluid flowing into the second lubricating flow path 1211. Since the second lubricating flow path 1211 is connected to the annular cavity 124, the condition of the lubricating fluid at the sliding bearing 123 can be intuitively obtained, and the lubrication monitoring of the sliding bearing 123 can be improved. For example, when the lubricating pump is empty or the lubricating flow path is blocked, the performance parameters can be changed. The abnormal situation can be discovered in time through the performance parameter changes detected by the detection component 20, thereby reducing the probability of loss or even failure of the sliding bearing 123.

[0053] Continue reading Figures 2 to 3 As shown, in some optional embodiments, in a gearbox 100 provided in one embodiment of the present application, a mounting hole 112 connected to a first lubrication flow path 111 is provided on the planet carrier 11.

[0054] In some optional embodiments, a gearbox 100 provided by an embodiment of the present application, the detection component 20 includes a pressure detector 21, and a mounting hole 112 connected to the first lubrication flow path 111 is provided on the planetary carrier 11. The pressure detector 21 is arranged to close the mounting hole 112 and is connected to the planetary carrier 11. The pressure detector 21 is configured to obtain the pressure of the lubrication fluid flowing into the second lubrication flow path 1211.

[0055] A gearbox 100 provided by an embodiment of the present application comprises a detection component 20 including a pressure detector 21, and the pressure detector 21 closes the mounting hole 112 connected to the first lubrication flow path 111. Since the first lubrication flow path 111 is connected to the second lubrication flow path 1211, both are filled with lubrication fluid. The pressure of the lubrication fluid flowing from the first lubrication flow path 111 to the second lubrication flow path 1211 can be detected by the pressure detector 21. It can be determined whether the lubrication fluid flowing into the annular cavity 124 where the sliding bearing 123 is located is abnormal, such as whether blockage is found, etc. The working condition of each sliding bearing 123 can be monitored to ensure the safe operation of the sliding bearing 123.

[0056] In some optional embodiments, in a gearbox 100 provided by an embodiment of the present application, the pressure detector 21 includes a wireless pressure sensor, and a portion of the wireless pressure sensor extends into the mounting hole 112 and is detachably connected to the planet carrier 11 .

[0057] Since the planetary gear 122 rotates relative to the planetary carrier 11 when the gearbox 100 is working, the pressure detector 21 includes a wireless pressure sensor, and the collected pressure signal can be transmitted to a predetermined position by wireless transmission, without the need to set cables, which can prevent the cables from being entangled on the transmission wheel group 12, resulting in blocking of pressure signal transmission or interference with the rotation of the planetary gear 122. At the same time, by partially extending the wireless pressure sensor into the mounting hole 112 and detachably connecting it to the planetary carrier 11, the connection requirements with the planetary carrier 11 can be guaranteed, and when the pressure sensor is damaged, it can be replaced in time to meet the pressure detection requirements.

[0058] In some optional embodiments, in a gearbox 100 provided by one embodiment of the present application, the first lubrication flow path 111 includes a first channel 1111 extending along the radial direction Y of the planetary shaft 121, the first channel 1111 is connected to the second lubrication flow path 1211 and the mounting hole 112, and the mounting hole 112 is coaxially arranged with the first channel 1111.

[0059] The first lubricating flow path 111 may extend along a straight line as a whole, and the mounting hole 112 may be coaxially arranged with the first lubricating flow path 111 as a whole. Of course, the first lubricating flow path 111 may also extend along a broken line, and the mounting hole 112 may be coaxially arranged with a part of the first lubricating flow path 111.

[0060] The lubricating fluid enters the flow path inside the gearbox 100 through the external pipeline, and then enters the annular cavity 124 where the sliding bearing 123 is located through the first lubricating flow path 111 and the second lubricating flow path 1211. When processing the first lubricating oil path inside the planet carrier 11, it is necessary to punch a hole from the outside, and finally seal the outside hole with a screw plug. Since the lubricating fluid fills the internal lubricating flow path when the gearbox 100 is running, the mounting hole 112 is coaxially arranged with the first channel 1111, so that the mounting hole 112 can be used as a process hole when the first channel 1111 is opened, that is, the mounting hole 112 can be formed by punching a hole on the outside of the planet carrier 11, and the first channel 1111 can be formed by further deepening the mounting hole 112. At the same time, the mounting hole 112 can also be used to install the pressure detector 21 to achieve communication with the first channel 1111 to ensure pressure detection requirements.

[0061] Continue reading Figures 2 to 3As shown, in some optional embodiments, in a gearbox 100 provided by an embodiment of the present application, the mounting hole 112 and the first channel 1111 are distributed on both sides of the planetary shaft 121 in its own radial direction Y. Through the above arrangement, it is convenient to open the first channel 1111, and can provide a larger space for the pressure detector 21, so as to facilitate the disassembly and assembly of the pressure detector 21, and will not interfere with the installation of other components of the gearbox 100.

[0062] In some optional embodiments, the gearbox 100 provided in one embodiment of the present application has a wireless pressure sensor with a screw, and the wireless pressure sensor is inserted into the mounting hole 112 through the screw and is threadedly connected to the planet carrier 11. The connection strength is high, and the sealing is good through the multi-layer blocking of the thread.

[0063] In some optional embodiments, in a gearbox 100 provided by an embodiment of the present application, an annular groove 1212 is arranged on the outer periphery of the planetary shaft 121 around its own axis, the first channel 1111 and the mounting hole 112 are respectively arranged opposite to and communicated with the annular groove 1212 in the radial direction Y, and the inlet 12111 of the second lubrication flow path 1211 is communicated with the annular groove 1212.

[0064] The annular groove 1212 is arranged around the axis of the planetary shaft 121 , and the annular groove 1212 can be formed by starting from the outer circumferential surface of the planetary shaft 121 and being recessed toward the inside of the planetary shaft 121 .

[0065] In a gearbox 100 provided by an embodiment of the present application, when the first channel 1111 and the mounting hole 112 are distributed on both sides of the planetary shaft 121 in the radial direction Y, the two are disconnected in the channel where the planetary shaft 121 is located. By providing an annular groove 1212 on the planetary shaft 121, the annular groove 1212 can be enclosed with the wall surface of the planetary carrier 11 to form an annular channel, and the lubricating fluid flowing out of the first channel 1111 can be guided into the mounting hole 112 through the annular groove 1212. Since the lubricating fluid fills the first lubricating flow path 111, the annular groove 1212, the mounting hole 112, the second lubricating flow path 1211 and the annular cavity 124 and is connected to each other, the pressures at various locations are basically the same. By detecting the pressure of the lubricating fluid in the mounting hole 112, it can be roughly equivalent to the pressure of the lubricating fluid flowing into the second lubricating flow path 1211, which can not only ensure the installation space requirement of the pressure detector 21, but also ensure the reliability of pressure detection.

[0066] Continue reading Figures 2 to 4As shown, in some optional embodiments, the gearbox 100 provided in one embodiment of the present application, its detection component 20 may also include a flow detector 22, the flow detector 22 is arranged in the second lubrication flow path 1211 and is located between the inlet 12111 and the outlet 12112 of the second lubrication flow path 1211, and the flow detector 22 is configured to obtain the flow rate of the lubrication fluid flowing into the second lubrication flow path 1211.

[0067] The gearbox 100 provided in one embodiment of the present application can obtain the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 by setting a flow detector 22, so as to judge the volume of the lubricating fluid flowing into the annular cavity 124 where the sliding bearing 123 is located per unit time, so as to judge whether the lubrication is sufficient. When the flow path through which the lubricating fluid circulates is blocked, the flow rate of the lubricating fluid flowing into the annular cavity 124 is insufficient, etc., the flow rate can be fed back through the flow rate detected by the flow detector 22, so that the operation of the sliding bearing 123 can be monitored in time to ensure the safe operation of the sliding bearing 123.

[0068] In some optional embodiments, a gearbox 100 provided by an embodiment of the present application is provided with a plug hole 1213 connected to the second lubrication flow path 1211 on the planetary shaft 121, and the plug hole 1213 extends from the end face of the planetary shaft 121 in its own axial direction X to the second lubrication flow path 1211 along the axial direction X, and the flow detector 22 can extend into the second lubrication flow path 1211 through the plug hole 1213 and be fixedly connected to the planetary shaft 121, and a sealing piece 125 is provided at one end of the plug hole 1213 facing away from the second lubrication flow path 1211 to seal the plug hole 1213.

[0069] The gearbox 100 provided in one embodiment of the present application, by setting a plug hole 1213 and connecting it with the second lubrication flow path 1211, is conducive to installing the flow detector 22 into the second lubrication flow path 1211 through the plug hole 1213 to ensure the flow detection requirements. At the same time, the setting of the plug hole 1213 facilitates the opening of the second lubrication flow path 1211 and reduces the difficulty of forming the second lubrication flow path 1211.

[0070] In some optional embodiments, an embodiment of the present application provides a gearbox 100, wherein the second lubrication flow path 1211 includes a main channel 1211a and an inlet channel 1211b and an output channel 1211c respectively intersecting and communicating with the main channel 1211a, the main channel 1211a extends along the axial direction X of the planetary shaft 121, the inlet channel 1211b and the output channel 1211c are spaced apart in the axial direction X, the inlet channel 1211b has an inlet 12111, the output channel 1211c has an outlet 12112, the plug hole 1213 is coaxially arranged and communicated with the main channel 1211a, and the flow detector 22 is located in the main channel 1211a.

[0071] The inlet flow channel 1211 b may be in communication with the first lubrication flow path 111 through the inlet 12111 , and the outlet flow channel 1211 c may be in communication with the annular cavity 124 through the outlet 12112 .

[0072] In a gearbox 100 provided in one embodiment of the present application, the structural form of the second lubrication flow path 1211 can not only ensure the connectivity requirement with the first lubrication flow path 111 and the lubrication requirement for the sliding bearing 123, but also ensure the convenience of installation of the flow sensor 22. Moreover, the plug hole 1213 can also serve as a process hole opened in the main channel 1211a, so that holes can be punched into the interior of the planetary shaft 121 starting from the axial X-end face of the planetary shaft 121 to form a connected plug hole 1213 and the main channel 1211a, which is beneficial to the forming of the main channel 1211a.

[0073] In some optional embodiments, a thread may be provided on the inner wall of the second lubricating flow path 1211, and the flow detector 22 may be threadedly connected to the planetary shaft 121, and a connecting glue may be provided at the threaded connection to prevent loosening. Optionally, the flow detector 22 may be in the form of a worm, which is convenient for installation on the planetary shaft 121 and flow detection.

[0074] like Figure 4 as well as Figure 5 As shown, in some optional embodiments, a gearbox 100 is provided in one embodiment of the present application, and the gearbox 100 also includes a wireless transmitter 30. A mounting groove 1214 and a threading hole 1215 connecting the mounting groove 1214 and the second lubrication flow path 1211 are provided on the planetary shaft 121. The wireless transmitter 30 is embedded in the mounting groove 1214 and the threading hole 1215 is sealed. A cable 40 is provided in the threading hole 1215, and the cable 40 is connected between the flow detector 22 and the wireless transmitter 30.

[0075] The gearbox 100 provided in one embodiment of the present application can wirelessly transmit the flow signal detected by the flow detector 22 through the wireless transmitter 30 by setting a wireless transmitter 30 and setting a threading hole 1215 and a cable 40. There is no need to guide the cable 40 outside the planetary shaft 121, so as to avoid interfering with the rotation of the transmission wheel group 12.

[0076] In some optional embodiments, the gearbox 100 provided in one embodiment of the present application, its detection component 20 may include one of a pressure detector 21 and a flow detector 22, and feedback the operation condition of the sliding bearing 123 by detecting the change of one of the pressure and flow of the lubricating fluid flowing into the second lubricating flow path 1211. Of course, the detection component 20 may also include both the pressure detector 21 and the flow detector 22, which can synchronously detect the pressure and flow of the lubricating fluid flowing into the second lubricating flow path 1211, so that the operation condition of the sliding bearing 123 can be judged by double verification of the feedback pressure signal and the flow signal, thereby reducing the false alarm rate.

[0077] A gearbox 100 provided in one embodiment of the present application may include a one-stage planetary system 10. Of course, it may also include multiple stages of planetary systems 10 connected in sequence. A detection component 20 may be provided on each planetary system 10 to separately monitor the sliding bearings 123 of each transmission wheel group 12 to ensure the safe operation of the sliding bearings 123.

[0078] like Figures 2 to 5 As shown, on the other hand, an embodiment of the present application further provides a lubrication control system for a gearbox 100, the gearbox 100 includes a planetary carrier 11 and a plurality of transmission wheel sets 12 arranged on the planetary carrier 11, each transmission wheel set 12 includes a planetary shaft 121, a planetary wheel 122 and a sliding bearing 123, the planetary shaft 121 is connected to the planetary carrier 11, the planetary wheel 122 is sleeved on the planetary shaft 121 and forms an annular cavity 124 with the planetary shaft 121, the sliding bearing 123 is arranged in the annular cavity 124, the sliding bearing 123 is arranged around the planetary shaft 121 and rotates with the planetary wheel 122, a first lubrication flow path 111 is arranged on the planetary carrier 11, and a second lubrication flow path 1211 is arranged on the planetary shaft 121, the second lubrication flow path 1211 connects the first lubrication flow path 111 and the annular cavity 124, and the lubrication fluid entering from the first lubrication flow path 111 is guided to the annular cavity 124 via the second lubrication flow path 1211.

[0079] The lubrication control system includes a detection component 20 and a controller. The detection component 20 can be set on at least one of the planetary carrier 11 and the planetary shaft 121. The detection component 20 is configured to detect performance parameters of the lubricating fluid in the planetary system 10, and the performance parameters include at least one of the pressure and flow rate of the lubricating fluid flowing into the second lubrication flow path 1211. The controller is connected to the detection component 20 by signal, and the controller is configured to control the gearbox 100 to switch between a shutdown state and a running state according to the performance parameters of the lubricating fluid obtained by the detection component 20.

[0080] A lubrication control system provided by an embodiment of the present application can detect the performance parameters of the lubricating fluid in the planetary system 10 through the detection component 20, such as detecting at least one of the pressure and flow rate of the lubricating fluid flowing into the second lubrication flow path 1211, so that the condition of the lubricating fluid at the sliding bearing 123 can be intuitively obtained, and the lubrication monitoring of the sliding bearing 123 can be improved. The controller controls the shutdown and operation of the gearbox 100 according to the performance parameters of the lubricating fluid obtained by the detection component 20, so that the sliding bearing 123 can operate in a safe environment, thereby reducing the failure probability of the sliding bearing 123, and thereby reducing the failure rate of the gearbox 100 itself.

[0081] In some optional embodiments, in a lubrication control system provided by an embodiment of the present application, the controller is configured to: control the gearbox 100 to switch between a shutdown state and a running state according to the pressure of the lubrication fluid flowing into the second lubrication flow path 1211 obtained by the detection component 20 and the flow rate of the lubrication fluid flowing into the second lubrication flow path 1211 obtained by the detection component 20.

[0082] The detection component 20 may include a pressure detector 21 and a flow detector 22. When installed to the planetary system 10 of the gearbox 100, the installation form of the pressure detector 21 and the flow detector 22 on the planetary carrier 11 and the planetary shaft 121 is the same as the setting form of the above-mentioned embodiments in the gearbox 100, and will not be repeated here.

[0083] In a lubrication control system provided by an embodiment of the present application, the controller performs double verification based on the lubrication fluid flowing into the second lubrication flow path 1211 and the pressure obtained by the detection component 20 to determine the operating condition of the sliding bearing 123, reduce the false alarm rate, avoid the controller controlling the gearbox 100 to switch to the shutdown state multiple times, and ensure the workload efficiency of the gearbox 100.

[0084] In some optional embodiments, in a lubrication control system provided by an embodiment of the present application, the controller is configured as follows:

[0085] When the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 exceeds the first preset threshold range, if the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 exceeds the second preset threshold range within the predetermined time period, the gearbox 100 is controlled to be in a shutdown state; if the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 within the predetermined time period is within the second preset threshold range, the gearbox 100 is controlled to be in an operating state.

[0086] The lubrication control system provided by an embodiment of the present application can, through the above-mentioned configuration, further authenticate by detecting the flow conditions of the lubrication fluid flowing into the second lubrication flow path 1211, thereby avoiding shutdown due to excessive instantaneous pressure during the circulation of the lubrication fluid and reducing the misjudgment rate.

[0087] Exemplarily, the first preset threshold value range may be selected as: 1-5 bar, the second preset threshold value range may be selected as: 35-40 L / min, and the predetermined time period may be selected as any value between 25 s and 35 s.

[0088] In some optional embodiments, in a lubrication control system provided by an embodiment of the present application, the controller is configured as follows:

[0089] When the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 exceeds the second preset threshold range, if the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 is within the first preset threshold range, the gearbox 100 is controlled to be in the running state. If the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 obtained by the detection component 20 exceeds the first preset threshold range, the gearbox 100 is controlled to be in the shutdown state.

[0090] A lubrication control system provided in an embodiment of the present application, through the above-mentioned setting, allows the machine to continue to run without stopping if the pressure is still in a safe state when the acquired flow signal exceeds the second preset threshold range. If the pressure exceeds the first preset threshold range, the safety of the gearbox 100 may be affected due to excessive pressure. At this time, it is necessary to switch to the shutdown state for maintenance, etc. to ensure safety.

[0091] On the other hand, an embodiment of the present application further provides a wind turbine generator set, which may include the gearbox 100 provided in the above embodiments or the lubrication control system of the gearbox 100 provided in the above embodiments. When including the lubrication control system provided in the above embodiments, its controller may be an independently set controller, and of course, may also be integrated into the overall control of the wind turbine generator set.

[0092] A wind turbine generator set provided by an embodiment of the present application can intuitively obtain the condition of the lubricating fluid at the sliding bearing 123, realize perfect lubrication monitoring of the sliding bearing 123, reduce the failure probability of the sliding bearing 123, and further reduce the failure rate of the gearbox 100 itself, thereby improving the power generation efficiency of the wind turbine generator set itself.

[0093] On the other hand, the present application further provides a control method of a gearbox 100, which can be used for the gearbox 100 provided in the above embodiments. The gearbox 100 includes a planet carrier 11 and a plurality of transmission wheel sets 12 arranged on the planet carrier 11. Each transmission wheel set 12 includes a planet shaft 121, a planet wheel 122 and a sliding bearing 123 located between the planet shaft 121 and the planet wheel 122. An annular cavity 124 is formed between the sliding bearing 123 and the planet shaft 121. The planet shaft 121 is connected to the planet carrier 11. A first lubrication flow path 111 is provided on the planet carrier 11. A second lubrication flow path 1211 is provided on the planet shaft 121. The second lubrication flow path 1211 connects the first lubrication flow path 111 and the annular cavity 124. The lubrication fluid entering from the first lubrication flow path 111 is guided to the annular cavity 124 via the second lubrication flow path 1211. The control method includes:

[0094] Obtaining the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 and the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211;

[0095] The gearbox 100 is switched between the shutdown state and the operation state according to the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 and the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211 .

[0096] A control method provided by an embodiment of the present application performs double verification based on the lubricating fluid and pressure flowing into the second lubrication flow path 1211 to determine the operating condition of the sliding bearing 123, reduce the false alarm rate, avoid the controller controlling the gearbox 100 to switch to the shutdown state multiple times, and ensure the working efficiency of the gearbox 100.

[0097] In some optional implementations, a control method provided in an embodiment of the present application controls the gearbox 100 to switch between a shutdown state and a running state according to the pressure of the lubricating fluid flowing into the second lubricating flow path 1211 and the flow rate of the lubricating fluid flowing into the second lubricating flow path 1211, including:

[0098] When the pressure of the lubricating fluid flowing into the second lubricating circuit 1211 exceeds the first preset threshold range; if the flow rate of the lubricating fluid flowing into the second lubricating circuit 1211 exceeds the second preset threshold range within a predetermined time period, the gearbox 100 is controlled to be in a shutdown state; if the flow rate of the lubricating fluid flowing into the second lubricating circuit 1211 is within the second preset threshold range within a predetermined time period, the gearbox 100 is controlled to be in an operating state.

[0099] The control method provided by an embodiment of the present application can, through the above-mentioned setting, further authenticate by obtaining the flow conditions of the lubricating fluid flowing into the second lubricating flow path 1211, thereby avoiding shutdown due to excessive instantaneous pressure during the circulation of the lubricating fluid and reducing the misjudgment rate.

[0100] In some optional implementations, a control method provided by an embodiment of the present application controls the gearbox 100 to switch between a shutdown state and a running state according to the pressure of the lubricating fluid flowing into the second lubricating circuit 1211 and the flow rate of the lubricating fluid flowing into the second lubricating circuit 1211, and also includes: when the acquired flow rate of the lubricating fluid flowing into the second lubricating circuit 1211 exceeds the second preset threshold range; if the acquired pressure of the lubricating fluid flowing into the second lubricating circuit 1211 is within the first preset threshold range, then the gearbox 100 is controlled to be in the running state; if the acquired pressure of the lubricating fluid flowing into the second lubricating circuit 1211 exceeds the first preset threshold range, then the gearbox 100 is controlled to be in the shutdown state.

[0101] A control method provided by an embodiment of the present application, through the above-mentioned setting, when the acquired flow signal exceeds the second preset threshold range, if the pressure is still in a safe state, the operation can be continued without stopping; if the pressure exceeds the first preset threshold range, the safety of the gearbox 100 may be affected due to excessive pressure. At this time, it is necessary to switch to the shutdown state for maintenance, etc. to ensure safety.

[0102] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gear box, characterized in that: include: A planetary system, comprising a planet carrier and a plurality of transmission wheel groups arranged on the planet carrier, each of the transmission wheel groups comprising a planet shaft, a planet wheel and a sliding bearing, the planet shaft being connected to the planet carrier, the planet wheel sleeve being arranged on the planet shaft and forming an annular cavity with the planet shaft, the sliding bearing being arranged in the annular cavity, the sliding bearing being arranged around the planet shaft and rotatingly cooperating with the planet wheel, the planet carrier being provided with a first lubrication flow path, the planet shaft being provided with a second lubrication flow path, the second lubrication flow path being connected with the first lubrication flow path and the annular cavity, and the lubrication fluid entering from the first lubrication flow path being guided to the annular cavity via the second lubrication flow path; A detection component is arranged on at least one of the planetary carrier and the planetary shaft, and the detection component is configured to detect performance parameters of the lubricating fluid in the planetary system, and the performance parameters include at least one of the pressure and flow rate of the lubricating fluid flowing into the second lubrication flow path.

2. The gearbox according to claim 1, characterized in that: The detection component includes a pressure detector, the planetary carrier is provided with a mounting hole connected to the first lubrication flow path, the pressure detector is closed by the mounting hole and connected to the planetary carrier, and the pressure detector is configured to obtain the pressure of the lubrication fluid flowing into the second lubrication flow path.

3. The gearbox according to claim 2, characterized in that: The pressure detector comprises a wireless pressure sensor, and a portion of the wireless pressure sensor extends into the mounting hole and is detachably connected to the planet carrier.

4. The gearbox according to claim 2, characterized in that: The first lubrication flow path includes a first channel extending in the radial direction of the planetary shaft. The first channel is connected to the second lubrication flow path and the mounting hole. The mounting hole is coaxially arranged with the first channel and distributed on both sides of the planetary shaft in the radial direction.

5. The gearbox according to claim 4, characterized in that: An annular groove is arranged on the outer circumference of the planetary shaft around its own axis, the first channel and the mounting hole are arranged opposite to and communicate with the annular groove in the radial direction, and the inlet of the second lubrication flow path is communicated with the annular groove.

6. The gearbox according to any one of claims 1 to 5, characterized in that: The detection component also includes a flow detector, which is arranged in the second lubrication flow path and located between the inlet and the outlet of the second lubrication flow path. The flow detector is configured to obtain the flow rate of the lubrication fluid flowing into the second lubrication flow path.

7. The gearbox according to claim 6, characterized in that: The planetary shaft is provided with a plug hole connected to the second lubrication flow path. The plug hole starts from the axial end face of the planetary shaft and extends along the axial direction to the second lubrication flow path. The flow detector can extend into the second lubrication flow path through the plug hole and be fixedly connected to the planetary shaft. A sealing piece is provided at one end of the plug hole away from the second lubrication flow path to seal the plug hole.

8. The gearbox according to claim 7, characterized in that: The second lubrication flow path includes a main channel and an inlet channel and an outlet channel respectively intersecting and connected with the main channel, the main channel extends along the axial direction of the planetary shaft, the inlet channel and the outlet channel are spaced apart in the axial direction, the inlet channel has the inlet, the outlet has the outlet, the plug hole is coaxially arranged and connected with the main channel, and the flow detector is located in the main channel.

9. The gearbox according to claim 6, characterized in that: The gearbox also includes a wireless transmitter, the planetary shaft is provided with a mounting groove and a threading hole connecting the mounting groove and the second lubrication flow path, the wireless transmitter is embedded in the mounting groove and the threading hole is sealed, a cable is provided in the threading hole, and the cable is connected between the flow detector and the wireless transmitter.

10. A lubrication control system for a gearbox, the gearbox comprising a planetary carrier and a plurality of transmission wheel groups arranged on the planetary carrier, each of the transmission wheel groups comprising a planetary shaft, a planetary wheel and a sliding bearing, the planetary shaft being connected to the planetary carrier, the planetary wheel sleeve being arranged on the planetary shaft and forming an annular cavity between the planetary shaft, the sliding bearing being arranged in the annular cavity, the sliding bearing being arranged around the planetary shaft and rotatingly cooperating with the planetary wheel, the planetary carrier being provided with a first lubrication flow path, the planetary shaft being provided with a second lubrication flow path, the second lubrication flow path being connected with the first lubrication flow path and the annular cavity, the lubrication fluid entering from the first lubrication flow path being guided to the annular cavity via the second lubrication flow path, characterized in that The lubrication control system comprises: a detection component, which can be disposed on at least one of the planet carrier and the planet shaft, and is configured to detect a performance parameter of the lubricating fluid in the planetary system, wherein the performance parameter includes at least one of a pressure and a flow rate of the lubricating fluid flowing into the second lubricating flow path; A controller is connected to the detection component signal, and the controller is configured to control the gearbox to switch between a stop state and a running state according to the performance parameters of the lubricating fluid obtained by the detection component.

11. The lubrication control system according to claim 10, characterized in that: The controller is configured to: The gearbox is controlled to switch between a stop state and a running state according to the pressure of the lubricating fluid flowing into the second lubricating flow path obtained by the detection component and the flow rate of the lubricating fluid flowing into the second lubricating flow path obtained by the detection component.

12. The wind turbine generator set according to claim 11, characterized in that: The controller is configured to: When the pressure of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component exceeds a first preset threshold range; If the flow rate of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component exceeds a second preset threshold range within a predetermined time period, the gearbox is controlled to be in the shutdown state; And / or, if the flow rate of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component is within a second preset threshold range within a predetermined time period, the gearbox is controlled to be in the operating state.

13. The wind turbine generator set according to claim 11 or 12, characterized in that: The controller is configured to: when the flow rate of the lubricating fluid flowing into the second lubricating flow path acquired by the detection component exceeds a second preset threshold range; If the pressure of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component is within a first preset threshold range, the gearbox is controlled to be in the operating state; and / or, if the pressure of the lubricating fluid flowing into the second lubricating circuit obtained by the detection component exceeds the first preset threshold range, the gearbox is controlled to be in the shutdown state.

14. A wind turbine generator set, characterized in that: It comprises a gear box as claimed in any one of claims 1 to 9, or a lubrication control system as claimed in any one of claims 10 to 13.

Images