Rotation response type lubricating device for bearing of wind turbine generator

Abstract

The utility model discloses a wind turbine generator bearing rotation response type lubricating device, which relates to the technical field of mechanical equipment lubricating systems and comprises a high-pressure grease pump, a detector, a main distributor, a plurality of secondary distributors and a detection system. The high-pressure grease pump is communicated with the inlet end of the main distributor through a pipeline, the inlet end of each secondary distributor is communicated with the outlet end of the main distributor through a pipeline, and the detector is arranged in the main distributor and electrically connected with the high-pressure grease pump through a wire. The detection system is arranged at the variable pitch bearing and the yaw bearing and used for detecting the rotation condition of the bearings and controlling the high-pressure grease pump, and therefore the problem of grease blockage can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of lubrication systems for mechanical equipment, and more specifically, to a rotation-responsive lubrication device for wind turbine bearings. Background Technology

[0002] Currently, the pitch and yaw bearings in wind turbines are lubricated using a timed and metered method via a dedicated grease pump. Specifically, if a preset program is set to automatically add grease for 480 seconds after the wind turbine has run for 72 hours, the system will execute this instruction. The yaw bearing lubrication process is similar. However, it's important to note that the current lubrication process does not monitor the actual operating state of the bearing; lubrication is performed regardless of whether the bearing is in dynamic yaw or pitch motion. In this situation, if the bearing is rotating, the added grease may not be evenly distributed, leading to localized blockages. Although a distributor is used to assist lubrication, the risk of localized blockages remains due to the lack of real-time monitoring of the bearing's operating state.

[0003] To address the aforementioned issues, we provide a rotation-responsive lubrication device for wind turbine bearings. Utility Model Content

[0004] To address the technical problem mentioned in the background art that the added grease may cause local blockage due to uneven distribution when the bearing is rotating, this utility model provides a rotation-responsive lubrication device for wind turbine bearings.

[0005] The rotation-responsive lubrication device for wind turbine bearings provided by this utility model adopts the following technical solution:

[0006] A wind turbine bearing rotation-responsive lubrication device includes a high-pressure grease pump, a detector, a main distributor, several secondary distributors, and a detection system. The high-pressure grease pump is connected to the inlet of the main distributor via a pipeline, and the inlet of each secondary distributor is connected to the outlet of the main distributor via a pipeline. The detector is located inside the main distributor and is electrically connected to the high-pressure grease pump via a wire. The detection system is located at the pitch and yaw bearings to detect the bearing rotation and control the high-pressure grease pump. The detection system includes several sensors, a controller, and a signal transmitter. The sensors and the signal transmitter are electrically connected to the controller. The sensors detect the rotational speed and displacement of the yaw and pitch bearings under normal conditions, when normal grease application will not cause blockage, and feed the detection signal back to the controller. When the rotational speed and displacement of the yaw and pitch bearings are abnormal, the sensors can feed the detection signal back to the controller, which then determines and controls the operation of the high-pressure grease pump. When the high-pressure grease pump and controller stop working, the signal transmitter sends this information to an external terminal.

[0007] Preferably, the main distributor and the secondary distributor are of the same model.

[0008] Preferably, both the main distributor and the secondary distributor are progressive plunger distributors.

[0009] Preferably, the main distributor includes a first block, several middle blocks, and a last block. Each middle block is assembled between the first block and the last block, and each middle block has an oil outlet connected to its side end. The first block has an oil inlet connected to its side, and the oil inlet is connected to each middle block. A plunger is slidably disposed in the inner cavity of each middle block.

[0010] Preferably, the number of oil outlets is six, namely outlet 1, outlet 2, outlet 3, outlet 4, outlet 5 and outlet 6, and the progressive oil outlet sequence is: outlet 1 → outlet 6 → outlet 4 → outlet 2 → outlet 5 → outlet 3 → outlet 1, and so on in a cyclical manner.

[0011] In summary, this utility model has the following beneficial technical effects:

[0012] By installing sensors at the pitch and yaw bearings, the speed and displacement of the bearings are monitored in real time. Under normal circumstances, the high-pressure grease pump performs grease filling according to the set pattern. When the sensor detects abnormal bearing speed or displacement, it feeds the detection signal back to the controller, which then stops the high-pressure grease pump. This signal is then fed back to the display terminal of the external operator via a signal transmitter. This structural design effectively avoids the problem of grease blockage.

[0013] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a wind turbine bearing rotation-responsive lubrication device according to an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the distributor in an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the high-pressure grease pump in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram of the progressive action of the distributor in an embodiment of this utility model;

[0018] Figure 5 This is a schematic diagram of the progressive action of the distributor plunger in an embodiment of this utility model;

[0019] Figure 6 This is a schematic diagram of the detection system in an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached diagram: 1. High-pressure grease pump; 2. Detector; 3. Main distributor; 4. Secondary distributor; 5. First block; 6. Middle block; 7. Last block; 8. Oil outlet; 9. Oil inlet; 10. Sensor; 11. Controller; 12. Signal transmitter. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1 to 6 The present invention will be described in further detail below.

[0022] It should be noted that the accompanying drawings are schematic and not to scale. For clarity and convenience, the relative dimensions and proportions of the parts shown are exaggerated or reduced in size; all dimensions are merely illustrative and not limiting. Furthermore, the same reference numerals are used for the same structures, elements, or fittings appearing in more than two drawings to indicate similar features.

[0023] This utility model discloses a rotation-responsive lubrication device for wind turbine bearings. (Refer to...) Figures 1 to 6A wind turbine bearing rotation-responsive lubrication device includes a high-pressure grease pump 1, a detector 2, a main distributor 3, several secondary distributors 4, and a detection system. The high-pressure grease pump 1 is connected to the inlet end of the main distributor 3 via a pipeline. The inlet end of each secondary distributor 4 is connected to the outlet end of the main distributor 3 via a pipeline. The detector 2 is installed inside the main distributor 3 and is electrically connected to the high-pressure grease pump 1 via a wire.

[0024] like Figure 6 As shown, the detection system is installed at the pitch and yaw bearings to detect the rotation of the bearings and control the high-pressure grease pump 1. The detection system includes several sensors 10, a controller 11, and a signal transmitter 12. The sensors 10 and the signal transmitter 12 are electrically connected to the controller 11. The sensors 10 detect the rotational speed of the yaw and pitch bearings under normal conditions, when normal grease filling will not cause blockage, and feed the detection signal back to the controller 11. When the rotational speed of the yaw and pitch bearings is abnormal, the sensors 10 can feed the detection signal back to the controller 11, which then judges and controls the operation of the high-pressure grease pump 1. When the high-pressure grease pump 1 and the controller stop working, the signal transmitter 12 sends this information to an external terminal. The controller 11 can be a CPU, PLC, computer, etc. The sensors 10 include speed sensors and displacement sensors.

[0025] Specifically, by installing sensors 10 at the pitch bearing and yaw bearing, the sensors 10 can detect the bearing speed and displacement in real time. Under normal circumstances, the high-pressure grease pump 1 performs grease filling according to the set molding. When the sensors 10 detect abnormal bearing speed or displacement, they feed the detection signal back to the controller 11, which then controls the high-pressure grease pump 1 to stop working. The signal is then fed back to the display terminal of the external operator via the signal transmitter 12. This structural design can effectively avoid the problem of grease blockage.

[0026] Specifically, the main distributor 3 and the secondary distributor 4 have the same model.

[0027] Specifically, both the main distributor 3 and the secondary distributor 4 are progressive plunger distributors.

[0028] like Figure 2 As shown, the main distributor 3 includes a first block 5, several middle blocks 6 and a last block 7. Each middle block 6 is assembled between the first block 5 and the last block 7, and each middle block 6 has an oil outlet 8 connected to its side end. The first block 5 has an oil inlet 9 connected to its side, and the oil inlet 9 is connected to each middle block 6. A plunger is slidably arranged in the inner cavity of the middle block 6.

[0029] Specifically, using hydraulic sequential control, the distributor MX-F can be easily monitored by proximity switches. The plungers, under the action of lubricating grease, sequentially distribute the grease, causing it to flow out of the outlet in turn. The proximity switches monitor the plunger activity, sending a signal to the controller for each plunger movement.

[0030] Specifically, there are six oil outlets (outlets 8 in total): outlet 1, outlet 2, outlet 3, outlet 4, outlet 5, and outlet 6. Figure 4 and Figure 5 As shown ( Figure 5 (I, II, and III are three plungers). The progressive oil discharge sequence is: outlet 1 → outlet 6 → outlet 4 → outlet 2 → outlet 5 → outlet 3 → outlet 1. This cycle repeats continuously, and so on, to achieve progressive oil discharge.

[0031] Specifically, such as Figure 5 As shown, the progressive distributor consists of independent distributor blocks, namely the first block 5 (without plunger), the middle block 6, and the last block 7. They are assembled by bolts (hexagonal countersunk screws) and locking washers, and O-rings are used between the distributor blocks.

[0032] Lubricating oil flows in through the distributor's inlet, passes through all the distribution blocks, and reaches plunger I. Plunger I is pushed to the left, and the lubricating oil is discharged from the pressure area on the left side of the plunger to outlet 1. Subsequently, plungers (II and III) switch positions in sequence, and the lubricating oil is forced to outlets 2 and 3. After plunger III switches positions, the lubricating oil directly enters the left side of plunger I, pushing plunger I to the right, and the lubricating oil is discharged from the pressure area on the right side of the plunger to outlet 4. Finally, plungers (II and III) will switch positions, and the lubricating oil will be forced to outlets 5 and 6. After plunger III switches positions, the lubricating oil enters the right side of the plunger again, thus starting a new progressive plunger distribution cycle. As long as lubricating oil is supplied to the progressive distributor, the above cycle will continue to repeat.

[0033] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0034] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotation-responsive lubrication device for wind turbine bearings, characterized in that, include: High-pressure grease pump (1), detector (2), main distributor (3), several secondary distributors (4) and detection system; The high-pressure grease pump (1) is connected to the inlet end of the main distributor (3) through a pipe. The inlet end of each of the secondary distributors (4) is connected to the outlet end of the main distributor (3) through a pipe. The detector (2) is installed inside the main distributor (3) and is electrically connected to the high-pressure grease pump (1) through a wire. The detection system is installed at the pitch bearing and yaw bearing to detect the rotation of the bearings and control the high-pressure grease pump (1); The detection system includes: Several sensors (10), a controller (11), and a signal transmitter (12); Both the sensor (10) and the signal transmitter (12) are electrically connected to the controller (11); The sensor (10) detects the rotational speed of the yaw and pitch bearings under normal conditions. Normal grease filling will not cause blockage. The sensor (10) feeds the detection signal back to the controller (11). When the rotational speed of the yaw and pitch bearings is abnormal, the sensor (10) can feed the detection signal back to the controller (11). The controller (11) judges and controls the operation of the high-pressure grease pump (1). When the high-pressure grease pump (1) and the controller stop working, the signal transmitter (12) sends this information to the external terminal.

2. The wind turbine bearing rotation-responsive lubrication device according to claim 1, characterized in that: The main distributor (3) and the secondary distributor (4) are of the same model.

3. The wind turbine bearing rotation-responsive lubrication device according to claim 1, characterized in that: Both the main distributor (3) and the secondary distributor (4) are progressive plunger distributors.

4. The wind turbine bearing rotation-responsive lubrication device according to claim 1, characterized in that: The main distributor (3) includes a first block (5), several middle blocks (6) and a last block (7). Each middle block (6) is assembled between the first block (5) and the last block (7). Each middle block (6) has an oil outlet (8) connected to its side end. The first block (5) has an oil inlet (9) connected to its side. The oil inlet (9) is connected to each middle block (6). A plunger is slidably disposed in the inner cavity of each middle block (6).

5. A wind turbine bearing rotation-responsive lubrication device according to claim 4, characterized in that: The number of oil outlets (8) is six, namely outlet 1, outlet 2, outlet 3, outlet 4, outlet 5 and outlet 6. The progressive oil outlet sequence is: outlet 1 → outlet 6 → outlet 4 → outlet 2 → outlet 5 → outlet 3 → outlet 1, and so on in a cyclical manner.

Images