CN118327917B - Wind generating set and main shaft bearing seat thereof - Google Patents
Wind generating set and main shaft bearing seat thereof Download PDFInfo
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- CN118327917B CN118327917B CN202410555709.1A CN202410555709A CN118327917B CN 118327917 B CN118327917 B CN 118327917B CN 202410555709 A CN202410555709 A CN 202410555709A CN 118327917 B CN118327917 B CN 118327917B
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- bearing seat
- bearing
- fan blade
- main shaft
- blade assembly
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
- F03D80/703—Shaft bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
- F03D17/027—Monitoring or testing of wind motors, e.g. diagnostics characterised by the component being monitored or tested
- F03D17/031—Shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Support Of The Bearing (AREA)
Abstract
本发明涉及风力发电机组主轴技术领域，尤其为一种风力发电机组及其主轴轴承座，包括轴承座体，主轴通过轴承旋转贯穿所述轴承座体，所述轴承座体与所述轴承之间形成有若干等距设置的通道；所述轴承座体的底部固定连接有管道，所述管道与所述通道连通；所述管道的内部设置有扇叶组件，所述扇叶组件通过传动机构与所述主轴传动连接，当所述主轴旋转时，所述扇叶组件工作，使外部低温空气流经所述通道；所述传动机构包括传动带；所述扇叶组件通过弹性挤压组件挤压并远离所述主轴，使所述传动带张紧；所述扇叶组件的下方设置有感测单元。本发明使得轴承可以长时间的保持与轴承座体之间的同心度，确保主轴安全、稳定的运行。
The present invention relates to the technical field of main shafts of wind turbine generator sets, and in particular to a wind turbine generator set and its main shaft bearing seat, comprising a bearing seat body, wherein the main shaft rotates through the bearing seat body through the bearing, and a plurality of equidistantly arranged channels are formed between the bearing seat body and the bearing; a pipe is fixedly connected to the bottom of the bearing seat body, and the pipe is communicated with the channel; a fan blade assembly is arranged inside the pipe, and the fan blade assembly is connected to the main shaft through a transmission mechanism, and when the main shaft rotates, the fan blade assembly works to make the external low-temperature air flow through the channel; the transmission mechanism comprises a transmission belt; the fan blade assembly is squeezed and away from the main shaft by an elastic squeezing assembly, so that the transmission belt is tensioned; a sensing unit is arranged below the fan blade assembly. The present invention enables the bearing to maintain concentricity with the bearing seat body for a long time, thereby ensuring the safe and stable operation of the main shaft.
Description
Technical Field
The invention relates to the technical field of main shafts of wind generating sets, in particular to a wind generating set and a main shaft bearing seat thereof.
Background
A wind power generator set is a system that converts kinetic energy of wind into electrical energy. The main shaft is a core component in the wind power generation system and has a crucial function. The wind wheel is mainly used for bearing and transmitting, and is connected with a wind wheel (comprising blades and a hub) and a generator, so that kinetic energy generated during rotation of the wind wheel can be effectively transmitted to the generator, and conversion from wind energy to electric energy is realized.
Specifically, when wind force acts on the blades to rotate the rotor, the main shaft transmits this rotational power to the generator through its internal gear system. The generator converts the received rotary power into electric energy for the power grid. Therefore, the performance of the main shaft is directly related to the conversion efficiency and stable operation of the wind generating set.
Therefore, the bearing seat of the main shaft also has an important function, and the main function of the bearing seat is to support the main shaft bearing and ensure that the bearing can stably and reliably run, thereby ensuring the overall performance and the safety of the wind generating set. In particular, the bearing housing provides a robust support structure for the bearing through precise design and manufacture, enabling the bearing to withstand the large radial and axial forces from the rotor as it rotates.
In such high-load working environment of wind generating set, the bearing of main shaft produces a large amount of heat easily, and the heat dispersion of bearing frame itself is insufficient to distribute the heat that the bearing produced to external environment fast, leads to bearing itself to amass serious, and then appears the circumstances that bearing wearing and tearing are accelerated, moreover, wind generating set's main shaft is horizontal, main shaft and flabellum isotructure's weight mostly can be used in the bottom of bearing, so accelerated bearing itself's wearing and tearing under amass thermal environment, finally lead to concentricity between main shaft and the bearing frame to be worse and worse.
Disclosure of Invention
The invention aims to provide a wind generating set and a main shaft bearing seat thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the main shaft bearing seat comprises a bearing seat body, wherein a main shaft penetrates through the bearing seat body in a rotating way through a bearing, and a plurality of channels which are equidistantly arranged are formed between the bearing seat body and the bearing;
the bottom of the bearing seat body is fixedly connected with a pipeline which is communicated with the channel;
the inside of the pipeline is provided with a fan blade assembly, the fan blade assembly is in transmission connection with the main shaft through a transmission mechanism, and when the main shaft rotates, the fan blade assembly works to enable external low-temperature air to flow through the channel;
the transmission mechanism comprises a transmission belt;
the fan blade assembly is extruded by the elastic extrusion assembly and is far away from the main shaft, so that the transmission belt is tensioned;
The fan blade assembly comprises a fan blade, wherein the fan blade is arranged at the upper end of the fan blade, a sensing unit is arranged below the fan blade assembly and used for sensing the height position of the fan blade assembly, and the sensing unit is electrically connected with a control module.
Preferably, the sensing unit comprises a pressure sensor.
Preferably, the sensing unit further comprises a supporting rod, the supporting rod is of a hollow tubular structure, the top end of the pressure sensor protrudes out of the top end face of the supporting rod, and the bottom end of the pressure sensor is installed inside the supporting rod.
Preferably, the bearing seat body, the main shaft and the two bearings are surrounded to form a cavity;
the bottom of the bearing seat body is fixedly connected with a shell, and the inner cavity of the shell is communicated with the channel and the pipeline;
the transmission mechanism is positioned in the inner cavity and the cavity;
the pressure sensor is arranged at the inner bottom of the inner cavity.
Preferably, the supporting rod vertically penetrates through the inner bottom wall of the shell and is in threaded connection with the inner bottom wall of the shell;
and a nut is connected to the part, located outside the inner cavity, of the support rod in a threaded manner.
Preferably, the bearing seat body comprises a cylinder part and thickened edges integrally formed at two ends of the cylinder part;
the channel is formed between the thickened rim and an outer ring of the bearing.
Preferably, a stop part is formed on the inner ring surface of the thickened edge;
the channel comprises a transverse channel and a vertical channel which are communicated, the transverse channel is arranged on the inner ring surface of the thickened edge, and the vertical channel is arranged on the side surface of the stop part, which is close to the bearing.
Preferably, the fan blade assembly comprises a rotating shaft, fan blades and a bearing with a seat, and the fan blades are fixedly arranged on the rotating shaft;
The transmission mechanism further comprises a first belt pulley and a second belt pulley, and the first belt pulley is in transmission connection with the second belt pulley through the transmission belt;
the second belt wheel is sleeved and fixed on the rotating shaft.
Preferably, the elastic extrusion assembly comprises a guide rod, a spring, a guide sleeve and mounting plates, wherein the guide rod is vertically arranged, the spring and the guide sleeve are sleeved on the guide rod, and the mounting plates are fixed at two ends of the guide rod;
the mounting plate is fixedly arranged on the inner surface of the shell;
the guide sleeve is fixedly connected with the bearing with the seat;
One end of the spring is abutted with the mounting plate positioned at the top of the guide rod, and the other end of the spring is abutted with the guide sleeve;
the pressure sensor is located directly below the seated bearing.
A wind generating set comprises the main shaft bearing seat.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, through the channel, the fan blade assembly and the driving belt, the main shaft can be directly utilized to drive the fan blade assembly to rotate in the pipeline, so that external low-temperature air rapidly flows through the channel, the low-temperature air absorbs heat generated by friction of the bearing and is discharged through the pipeline, the heat dissipation performance of the bearing is obviously enhanced, the abrasion speed of the bearing is reduced, the bearing can maintain concentricity with the bearing seat body for a long time, safe and stable operation of the main shaft is ensured, meanwhile, the elastic extrusion assembly is matched with the sensing unit, once the concentricity between the bearing seat body and the main shaft is poor to a certain extent, the elastic extrusion assembly can extrude the fan blade assembly to move downwards, the sensing unit senses a signal of the downward movement of the fan blade assembly and feeds back to the control module, and the control module makes corresponding measures according to the signal, so that the damage of the wind generating set caused by the temperature of the concentricity difference between the bearing seat body and the main shaft is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional elevation view of the present invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;
FIG. 4 is a schematic view of the partial structure of FIG. 2 according to the present invention;
FIG. 5 is a schematic view of the structure of the bearing housing of the present invention;
FIG. 6 is a schematic side sectional view of the housing of the present invention;
FIG. 7 is a schematic side view of the elastic pressing assembly of the present invention.
1, A bearing seat body, 11, a barrel part, 12, a thickened edge, 121, a stop part, 2, a main shaft, 3, a bearing, 31, an outer ring, 4, a shell, 41, an inner cavity, 5, a pipeline, 6, a fan blade assembly, 61, a rotating shaft, 62, a fan blade, 63, a belt seat bearing, 7, a transmission mechanism, 71, a first belt wheel, 72, a transmission belt, 73, a second belt wheel, 8, a channel, 81, a transverse channel, 82, a vertical channel, 9, an elastic extrusion assembly, 91, a guide rod, 92, a spring, 93, a mounting plate, 94, a guide sleeve, 10, a sensing unit, 101, a pressure sensor, 102, a supporting rod, 13, a nut and 100, and a cavity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 7, the present invention provides a technical solution:
A main shaft bearing seat comprises a bearing seat body 1, and a main shaft 2 rotates through the bearing seat body 1 through a bearing 3.
The foregoing is the prior art, and the differences of the present invention with respect to the prior art are described below.
As shown in fig. 1-7, a plurality of equally spaced channels 8 are formed between the bearing housing 1 and the bearing 3, and the channels 8 are used for forming a flow channel for air flow on the periphery of the bearing 3, so that the air flow in the external environment can be utilized to accelerate the heat dissipation of the bearing 3, the bearing 3 can be kept in a proper temperature state all the time, and the bearing 3 is prevented from being worn rapidly under the condition of overheating.
As shown in fig. 1-7, the bottom of the bearing seat body 1 is fixedly connected with a pipe 5, the pipe 5 can be made of metal (such as steel) and is cylindrical, the pipe 5 is communicated with a channel 8, a fan blade assembly 6 is arranged in the pipe 5, the fan blade assembly 6 is in transmission connection with the main shaft 2 through a transmission mechanism 7, when the main shaft 2 rotates, power on the main shaft 2 is transmitted to the fan blade assembly 6 through the transmission mechanism 7, so that the fan blade assembly 6 works (or rotates), external low-temperature air flows through the channel 8, and the low-temperature air absorbs heat generated by friction of the bearing 3 and is discharged through the pipe 5, so that the heat dissipation performance of the bearing 3 is further improved.
The transmission mechanism 7 in the present embodiment includes a transmission belt 72 for transmitting power.
The fan blade assembly 6 is extruded by the elastic extrusion assembly 9 and is far away from the main shaft 2, so that the transmission belt 72 is tensioned, and the power generated when the main shaft 2 rotates can be efficiently transmitted to the fan blade assembly 6.
The sensing unit 10 is disposed below the fan blade assembly 6, the sensing unit 10 is used for sensing the height position of the fan blade assembly 6, and the sensing unit 10 is electrically connected with the control module. In this embodiment, the control module may be a controller of the wind generating set itself, or may be a general PLC controller, and the main function of the control module is to receive the signal sensed by the sensing unit 10 and make a corresponding measure (such as sending an alarm) on the signal, and the control module may be an FX3U series in a mitsubishi PLC programmable controller, where the series controller uses a programmable memory of a type for storing programs therein, executing instructions facing the user, such as logic operation, sequential control, timing, counting, arithmetic operation, etc., and controlling various types of machines or production processes through digital or analog input/output.
In the above scheme, through the channel 8, the fan blade assembly 6 and the transmission belt 72, the main shaft 2 can be directly utilized to drive the fan blade assembly 6 to rotate in the pipeline 5, so that external low-temperature air rapidly flows through the channel 8, the low-temperature gas absorbs heat generated by friction of the bearing 3 and is discharged through the pipeline 5, the heat dissipation performance of the bearing 3 is obviously enhanced, the abrasion speed of the bearing 3 is reduced, the concentricity between the bearing 3 and the bearing seat body 1 can be kept for a long time, the main shaft 2 is ensured to safely and stably run, meanwhile, the elastic extrusion assembly 9 is matched with the sensing unit 10, once the concentricity between the bearing seat body 1 and the main shaft 2 is poor to a certain extent, the elastic extrusion assembly 9 can extrude the fan blade assembly 6 to move downwards, so that the sensing unit 10 senses a signal of the downward movement of the fan blade assembly 6 and feeds back to the control module, and the control module makes corresponding measures according to the signal, and the condition that the wind generating set is damaged due to the temperature difference between the bearing seat body 1 and the main shaft 2 is avoided. Meanwhile, the technical solution described in this embodiment can also detect whether the spindle 2 is bent, specifically, when the portion of the spindle 2 located inside the bearing seat body 1 is bent, the rotation radius of the spindle 2 is increased at this time, when the bent portion of the spindle 2 rotates to the top, the fan blade assembly 6 will pull down and move up on the driving belt 72, at this time, the sensing unit 10 and the fan blade assembly 6 will not contact, and when the bent portion of the spindle 2 rotates to the bottom, the fan blade assembly 6 will contact with the sensing unit 10 under the extrusion action of the elastic extrusion assembly 9, so as to generate an electrical signal, so that with the continuous rotation of the spindle 2, the electrical signal generated by the sensing unit 10 will be a signal with interval, so that it can be determined that the spindle 2 is in a bent state, and even if replacement is required.
In this embodiment, the sensing unit 10 includes a pressure sensor 101, specifically, when the concentricity between the bearing housing 1 and the spindle 2 is poor to a certain extent, the elastic pressing component 9 presses the fan blade component 6 to move downward so as to press the pressure sensor 101, and the pressure sensor 101 generates an electrical signal after being pressed and feeds back to the control module. The pressure sensor 101 may be 220-20T in terdi, and the pressure sensor 101 operates on the principle of converting force or pressure into an electrical signal using strain gauges as sensing elements.
As shown in fig. 1 to 7, the sensing unit 10 further includes a support rod 102, the support rod 102 is of a hollow tubular structure, the top end of the pressure sensor 101 protrudes from the top end surface of the support rod 102, and the bottom end of the pressure sensor 101 is installed inside the support rod 102. A hollow tubular support rod 102 is used to protect the sensing unit 10.
As shown in fig. 1-7, the bearing seat body 1, the main shaft 2 and the two bearings 3 are surrounded to form a cavity 100, the cavity 100 is communicated with the channel 8, and external air can enter the cavity 100 through the channel 8 under the action of the fan blade assembly 6.
As shown in fig. 1 to 7, the bottom of the bearing seat body 1 is fixedly connected with a housing 4, an inner cavity 41 of the housing 4 is communicated with a channel 8 and a pipeline 5, specifically, the inner cavity 41 is used for communicating a cavity 100 and the pipeline 5, and external air can enter the cavity 100 through the channel 8 under the action of the fan blade assembly 6 and then is discharged through the pipeline 5. The transmission mechanism 7 is positioned inside the inner cavity 41 and the cavity 100, and the pressure sensor 101 is arranged at the inner bottom of the inner cavity 41. The housing 4 is used for accommodating and protecting the transmission mechanism 7, and meanwhile, the arrangement of the housing 4 enables the transmission mechanism 7 not to introduce air in the external environment in the transmission process, so that the channel 8, the cavity 100, the inner cavity 41 and the pipeline 5 form a closed gas circulation system, low-temperature air in the external environment can only enter the gas circulation system through the channel 8, and air entering the gas circulation system can only be discharged through the pipeline 5.
As shown in fig. 1 to 7, the supporting rod 102 vertically penetrates through the inner bottom wall of the housing 4 and is in threaded connection with the inner bottom wall of the housing 4, so that the distance between the sensing unit 10 and the fan blade assembly 6 can be adjusted by rotating the supporting rod 102, a nut 13 is in threaded connection with the portion, located outside the inner cavity 41, of the supporting rod 102, and the nut 13 is used for locking the supporting rod 102 to prevent the supporting rod 102 from rotating due to vibration and other speeds.
As shown in fig. 1-7, the bearing seat body 1 comprises a barrel 11 and thickened edges 12 integrally formed at two ends of the barrel 11, a channel 8 is formed between the thickened edges 12 and an outer ring 31 of the bearing 3, a stop part 121 is further formed on the inner ring surface of the thickened edges 12, the channel 8 comprises a transverse channel 81 and a vertical channel 82 which are communicated, the transverse channel 81 is formed on the inner ring surface of the thickened edges 12, and the vertical channel 82 is formed on the side surface of the stop part 121 close to the bearing 3. Through setting up passageway 8 into two parts of cross-way 81 and vertical canal 82, can prolong the duration that low temperature air flowed through the bearing 3 surface, the heat absorption effect is better, simultaneously, also can make the low temperature air flow through the bearing 3 surface and take place the upset, avoid the local overheated condition of low temperature air.
As shown in fig. 1-7, the fan blade assembly 6 comprises a rotating shaft 61, fan blades 62 and a belt seat bearing 63, wherein the fan blades 62 are fixedly arranged on the rotating shaft 61, the transmission mechanism 7 further comprises a first belt pulley 71 and a second belt pulley 73, the first belt pulley 71 is in transmission connection with the second belt pulley 73 through a transmission belt 72, and the second belt pulley 73 is sleeved and fixed on the rotating shaft 61.
As shown in fig. 1 to 7, the elastic pressing assembly 9 comprises a guide rod 91 vertically arranged, a spring 92 and a guide sleeve 94 sleeved on the guide rod 91, and mounting plates 93 fixed at two ends of the guide rod 91, wherein the mounting plates 93 are fixedly arranged on the inner surface of the shell 4, the guide sleeve 94 is fixedly connected with the belt seat bearing 63, one end of the spring 92 is abutted with the mounting plate 93 positioned at the top of the guide rod 91, the other end of the spring 92 is abutted with the guide sleeve 94, the pressure sensor 101 is positioned under the belt seat bearing 63, and when the concentricity between the bearing seat body 1 and the main shaft 2 is poor to a certain extent, the elastic pressing assembly 9 presses the belt seat bearing 63 to move downwards, so that the belt seat bearing 63 is contacted with the pressure sensor 101, and the pressure sensor 101 generates an electric signal.
The embodiment also comprises a wind generating set, which comprises the main shaft bearing seat.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410555709.1A CN118327917B (en) | 2024-05-07 | 2024-05-07 | Wind generating set and main shaft bearing seat thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410555709.1A CN118327917B (en) | 2024-05-07 | 2024-05-07 | Wind generating set and main shaft bearing seat thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118327917A CN118327917A (en) | 2024-07-12 |
| CN118327917B true CN118327917B (en) | 2025-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410555709.1A Active CN118327917B (en) | 2024-05-07 | 2024-05-07 | Wind generating set and main shaft bearing seat thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116412092A (en) * | 2021-12-29 | 2023-07-11 | 新疆金风科技股份有限公司 | Gap adjusting device, bearing assembly and wind generating set |
| CN117489786A (en) * | 2023-12-14 | 2024-02-02 | 三一重能股份有限公司 | Sealing structure of oil lubricated bearings |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200102939A1 (en) * | 2018-10-01 | 2020-04-02 | Siemens Gamesa Renewable Energy A/S | Bearing arrangement for a wind turbine, wind turbine and method for manufacturing a wind turbine |
| CN217775581U (en) * | 2022-05-16 | 2022-11-11 | 苏州赛万玉山智能科技有限公司 | Main shaft adjusting mechanism for slicing machine |
| CN219827497U (en) * | 2023-03-01 | 2023-10-13 | 瑞卡斯(南京)精密机械有限公司 | Bearing seat sealing sleeve with good heat dissipation performance |
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- 2024-05-07 CN CN202410555709.1A patent/CN118327917B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116412092A (en) * | 2021-12-29 | 2023-07-11 | 新疆金风科技股份有限公司 | Gap adjusting device, bearing assembly and wind generating set |
| CN117489786A (en) * | 2023-12-14 | 2024-02-02 | 三一重能股份有限公司 | Sealing structure of oil lubricated bearings |
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| CN118327917A (en) | 2024-07-12 |
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