Variable-pitch bearing waste grease collecting system and variable-pitch bearing system
By fixing the C-shaped waste grease collection system on the outer ring of the pitch bearing, the use of tees and waste grease collection tubes to achieve balanced collection of waste grease, solving the problems of waste grease polluting the environment and unbalanced collection in traditional collection methods, reducing maintenance frequency and labor costs.
Patent Information
- Application Number
- CN202422467671.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-12
AI Technical Summary
Traditional pitch bearing waste grease collection methods are prone to falling off, causing waste grease to pollute the environment, and uneven collection of near and far points, resulting in frequent replacement of oil collecting bottles and increasing labor costs.
A variable-pitch bearing waste grease collection system is designed, and the waste grease collection module is fixed on the outer ring of the variable-pitch bearing. The waste grease collection tube and tee joint are adopted in a C-shaped arrangement. The waste grease enters the waste grease collection tube through the tee joint and is discharged into the oil collection bottle through the ventilation hole to achieve balanced collection of waste grease.
The balanced collection of waste fat is achieved, which avoids waste fat from spilling out of the environment, reduces the number of maintenance times, and reduces labor costs.
Smart Images
Figure CN223177686U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a waste grease collection system for a pitch bearing and a pitch bearing system. Background Art
[0002] The pitch bearing is an important component of a wind turbine, which undertakes the support and angle adjustment of three fan blades. All three pitch bearings are lubricated with grease. As the wind turbine bearing rotates, the internal grease deteriorates and forms waste grease. It is necessary to discharge the waste grease in time before injecting new grease. Generally, multiple grease discharge ports for discharging waste grease are evenly distributed around the pitch bearing. The traditional method usually uses a collection bottle or a collection bag at each grease discharge port. The following problems mainly exist in this method:
[0003] 1. The oil collection bottle or oil collection bag is easy to fall off, and the waste grease is easy to be thrown out and pollute the environment;
[0004] 2. The replacement of the oil collection bottle or oil collection bag is cumbersome and time-consuming;
[0005] 3. More importantly, since the wind turbine hub is not horizontally arranged, but has a certain elevation angle (as Figure 1 shown), the three pitch bearings are not horizontally arranged either (as Figure 2 shown), but the end close to the nacelle is low (commonly known as the near point, that is, Figure 2 , 3 at A8, B8, C8 in), the end far from the nacelle is high (commonly known as the far point). And because the pitch is within the range of ±45° during pitching, the positions of the near point and the far point are basically constant. Due to the action of gravity, the lubricating grease in the bearing flows downward, more near the near point and less near the far point. As a result, the collection bottle or collection bag near the near point is often quickly filled and overflows, while the collection bottle or collection bag near the far point often fails to collect waste grease, which is very unbalanced. Content of the Utility Model
[0006] To solve the above three problems, the utility model utilizes the characteristics that the grease discharge port of the pitch bearing is generally located on the outer ring of the pitch bearing and the outer ring is fixed relative to the hub. By providing a waste grease collection system for the pitch bearing and a pitch bearing system applying the above waste grease collection system for the pitch bearing, the waste grease collection system for the pitch bearing is fixed on the outer ring of the pitch bearing. A waste grease collection unit is arranged at the near point, and is connected in series by waste grease collection pipes to form a C shape. Collection bottles are connected to both ends of the waste grease collection pipe near the far point. The collection bottle is provided with a ventilation hole communicating with the atmosphere. The waste grease collected by each waste grease collection unit gradually fills the waste grease collection pipe, discharges the air in the pipe into the collection bottle, and discharges it through the ventilation hole.
[0007] The technical solution of the waste grease collection system for the pitch bearing of the present utility model is as follows: The waste grease collection system for the pitch bearing includes a collection module arranged in a C shape on the pitch bearing and symmetrically covering each grease drain port near the near point; the collection module includes:
[0008] A waste grease collection pipe for collecting and storing waste grease;
[0009] A waste grease collection unit for being correspondingly installed at each grease drain port near the near point of the pitch bearing, including a three-way joint. One interface of the three-way joint is used to connect with the corresponding grease drain port, and the other two interfaces are respectively used to connect to the waste grease collection pipe;
[0010] There are two oil collecting bottles, which are respectively communicated with the outer ends of the waste grease collection pipes at both ends of the collection module. An air vent communicating with the atmosphere is provided in the oil collecting bottle;
[0011] When collecting waste grease, the waste grease enters the waste grease collection pipe through the three-way joint, squeezing the air in the collection module towards the oil collecting bottle and discharging it through the air vent.
[0012] The beneficial effects of this solution: When this application is in use, since the collection module is mainly concentrated near the near point of the pitch bearing, and little waste grease can be basically collected near the far point, the waste grease collection unit can be not arranged. As the bearing runs, the rolling elements squeeze the waste grease, which can squeeze the waste grease out of the grease drain port, and then enter the interconnected waste grease collection pipes through each three-way joint. The waste grease collection pipe is equivalent to an "equalizer". Whether the amount of waste grease collected at each grease drain port is more or less, it will converge in the waste grease collection pipe and will not overflow. As the waste grease in the waste grease collection pipe gradually increases, the air in the pipe is gradually squeezed and goes towards both ends, and then enters the oil collecting bottles at both ends and is discharged through the air vents in the oil collecting bottles. Compared with the existing solution of opening exhaust holes on the three-way joint, even when it is full of waste grease, the waste grease will not be thrown out from the exhaust holes but enter the oil collecting bottle, which can solve the problem that the waste grease is thrown everywhere. Moreover, the whole set of system is basically composed of waste grease collection pipes and three-way joints, which are not easy to fall off. Since the waste grease collection pipe can store more waste grease and can play the role of an "equalizer", it can avoid the problem of frequently replacing the oil collecting bottle, reduce the maintenance times, lower the labor cost, and avoid the oil collecting bottle near the near point being quickly filled and overflowing to pollute the environment.
[0013] Further, an exhaust pipe is provided at the bottom of the oil collecting bottle. The upper end of the exhaust pipe extends towards the bottle mouth of the oil collecting bottle, and the lower end communicates with the atmosphere.
[0014] Further, the bottle mouth of the oil collecting bottle is connected to the corresponding waste grease collection pipe through an oil pipe joint.
[0015] Further, the oil collecting bottle includes a bottle body and a bottle cap. The oil pipe joint is installed on the bottle cap, and the bottle cap and the bottle body are connected by a thread with an anti-loosening structure.
[0016] Further, the three-way joint is threadedly connected to the grease drain port.
[0017] Further, the three-way joint is connected to the waste grease collection pipe by a hoop.
[0018] The technical solution of the pitch bearing system of the present utility model is as follows: It includes a pitch bearing and a pitch bearing waste grease collection system installed on the pitch bearing. The pitch bearing waste grease collection system includes a collection module arranged in a C shape on the pitch bearing and symmetrically covering each grease drain port near the near point; the collection module includes:
[0019] A waste grease collection pipe for collecting and storing waste grease;
[0020] A waste grease collection unit for being correspondingly installed at each grease drain port near the near point of the pitch bearing. It includes a three-way joint. One interface of the three-way joint is used to connect to the corresponding grease drain port, and the other two interfaces are respectively used to connect to the waste grease collection pipe;
[0021] There are two oil collecting bottles, which are respectively communicated with the outer ends of the waste grease collection pipes at both ends of the collection module. An air vent communicating with the atmosphere is provided in the oil collecting bottle;
[0022] When collecting waste grease, the waste grease enters the waste grease collection pipe through the three-way joint, squeezes the air in the collection module towards the oil collecting bottle and discharges it through the air vent.
[0023] The beneficial effects of this solution: When this application is in use, since the collection module is mainly concentrated near the near point of the pitch bearing, and basically no waste grease can be collected near the far point, the waste grease collection unit can not be arranged. As the bearing operates, the rolling elements squeeze the waste grease, which can squeeze the waste grease out of the grease drain port, and then enter the interconnected waste grease collection pipes through each three-way joint. The waste grease collection pipe is equivalent to an "equalizer". Whether the amount of waste grease collected by each grease drain port is more or less, it will converge in the waste grease collection pipe and will not overflow. As the waste grease in the waste grease collection pipe gradually increases, the air in the pipe is gradually squeezed towards both ends, and then enters the oil collecting bottles at both ends and is discharged through the air vents in the oil collecting bottles. Compared with the existing solution of opening exhaust holes on the three-way joint, even when it is full of waste grease, the waste grease will not be thrown out from the exhaust holes, but will enter the oil collecting bottle, which can solve the problem of waste grease being thrown everywhere. Moreover, the whole set of system is basically composed of waste grease collection pipes and three-way joints, and is not easy to fall off. Since the waste grease collection pipe can store more waste grease and can play the role of an "equalizer", it can avoid the problem of frequently replacing the oil collecting bottle, reduce the maintenance frequency, lower the labor cost, and avoid the oil collecting bottle near the near point being quickly filled and overflowing to pollute the environment.
[0024] Further, an exhaust pipe is provided at the bottom of the oil collecting bottle. The upper end of the exhaust pipe extends towards the bottle mouth of the oil collecting bottle, and the lower end communicates with the atmosphere.
[0025] Further, the mouth of the oil collecting bottle is connected to the corresponding waste grease collecting pipe through a tubing joint.
[0026] Further, the oil collecting bottle includes a bottle body and a bottle cap. The tubing joint is installed on the bottle cap, and the bottle cap and the bottle body are connected by a thread with a loosening prevention structure.
[0027] Further, the tee joint is connected to the grease discharge port by a thread.
[0028] Further, the tee joint is connected to the waste grease collecting pipe by a hoop. Description of the Drawings
[0029] Figure 1 is a partial schematic view of a wind turbine of the prior art;
[0030] Figure 2 is a schematic view of the structure of a hub and a corresponding pitch bearing of the prior art;
[0031] Figure 3 is a schematic view of collecting waste grease by installing an oil collecting bottle on a pitch bearing of the prior art;
[0032] Figure 4 is a schematic view of the layout structure of the waste grease collecting system of the pitch bearing of the present invention on the pitch bearing;
[0033] Figure 5 is Figure 4 a schematic view of the internal structure of the corresponding tee joint, waste grease collecting pipe and pitch bearing connected to each other in ;
[0034] Figure 6 is a schematic view of the internal structure of the oil collecting bottle;
[0035] In the figure: 1 - tower barrel, 2 - nacelle, 3 - hub, 4 - blade, 5 - pitch bearing, 51 - inner ring, 52 - outer ring, 53 - grease discharge port, 6 - suction and discharge grease device, 7 - breathing bottle, A8 / B8 / C8 - near point, A4 / B4 / C4 - far point, A1 - A3, B1 - B3, C1 - C3, A5 - A7, B5 - B7, C5 - C7 are other grease discharge ports; 8 - tee joint, 9 - oil collecting bottle, 91 - exhaust pipe, 92 - vent hole, 93 - grease retaining cap, 94 - tubing joint, 95 - bottle cap, 96 - bottle body, 10 - waste grease collecting pipe, 20 - hoop. Detailed Embodiments
[0036] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0037] Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.
[0038] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.
[0039] The features and performance of the present utility model will be further described in detail below with reference to the embodiments.
[0040] An embodiment of the waste grease collection system for the pitch bearing of the present utility model: As Figures 4 - 6 shown, the waste grease collection system for the pitch bearing is mainly used for collecting the waste grease of the bearing, and mainly includes a collection module and auxiliary accessories. The collection module includes multiple waste grease collection pipes 10 and multiple waste grease collection units, and the two are connected in an alternating manner to form a C-shaped structure and symmetrically cover the vicinity of the near point of the corresponding pitch bearing 5. The two ends of the C-shaped structure are respectively waste grease collection pipes 10. The outer end of the waste grease collection pipe 10 is connected to an oil collection bottle 9 through an oil pipe joint 94. And at the grease discharge port 53 near the far point of the pitch bearing 5, instead of setting a tee joint 8, it is directly blocked, because the grease near the far point is relatively less. After blocking, the grease here will slowly creep towards the vicinity of the near point under the action of gravity.
[0041] The waste grease collection pipe 103 is used to collect and store waste grease. In this embodiment, a plastic hose is adopted. The waste grease collection unit includes a three-way joint 8. One interface of the three-way joint 8 is used to connect with the grease discharge port 53 of the bearing, and the other two interfaces are respectively used to connect with the waste grease collection pipes 10. The three-way joint 8 is connected to the grease discharge port 53 by threads, and the three-way joint 8 is connected to the waste grease collection pipe 10 by a hoop.
[0042] The waste grease collection unit is used to be correspondingly installed at each grease discharge port 53 near the near point close to the pitch bearing 5 ( Figure 4 six grease discharge ports 53 at AB / B8 / C8 and the vicinity thereof). The waste grease collection unit includes a three-way joint 8. One interface of the three-way joint 8 is connected to the corresponding grease discharge port 53, and the other two interfaces are respectively connected to the waste grease collection pipes 10.
[0043] There are two oil collecting bottles 9, which are respectively communicated with the outer ends of the waste grease collection pipes 10 at both ends of the collection module. An air vent 92 communicating with the atmosphere is provided in the oil collecting bottle 9; specifically, an exhaust pipe 91 is provided at the bottom of the oil collecting bottle 9. The upper end of the exhaust pipe 91 extends towards the bottle mouth of the oil collecting bottle 9 and the lower end communicates with the atmosphere. The bottle mouth of the oil collecting bottle 9 is connected to the corresponding waste grease collection pipe 10 through an oil pipe joint 94. The oil collecting bottle 9 includes a bottle body 96 and a bottle cap 95. The oil pipe joint 94 is installed on the bottle cap 95, and the bottle cap 95 is connected to the bottle body 96 by threads with an anti-loosening structure.
[0044] When collecting waste grease, the waste grease enters the waste grease collection pipe 10 through the three-way joint 8, squeezing the air in the collection module towards the oil collecting bottle 9 and discharging it through the air vent 92.
[0045] When the present application is in use, since the collection modules are mainly arranged near the near point of the pitch bearing 5, and the waste grease collection unit can be omitted near the far point because basically no waste grease can be collected. As the bearing runs, the rolling body squeezes the waste grease and can squeeze the waste grease out of the grease discharge port 53, and then enters the interconnected waste grease collection pipe 10 through each three-way joint 8. The waste grease collection pipe 10 is equivalent to an "equalizer". No matter how much or how little is collected at each grease discharge port 53, it is all gathered in the waste grease collection pipe 10 and will not overflow. As the waste grease in the waste grease collection pipe 10 gradually increases, the air in the pipe is gradually squeezed and goes toward the two ends, and then enters The waste grease is then pumped out of the oil collecting bottle 9 and discharged through the vent holes 92 in the oil collecting bottle 9. Compared with the prior art solution of providing an exhaust hole on the three-way joint 8, even if the waste grease is fully collected, the waste grease will not be thrown out from the exhaust hole, but will enter the oil collecting bottle 9, which can solve the problem of waste grease being thrown everywhere. Moreover, the entire system is basically composed of the waste grease collecting pipe 10 and the three-way joint 8, which is not easy to fall off. Since the waste grease collecting pipe 10 can store more waste grease and can realize the "equalizer" effect, the problem of frequent replacement of the oil collecting bottle 9 can be avoided, the number of maintenance times, the labor cost, and the avoidance of the oil collecting bottle 9 being quickly filled up near the point and overflowing to pollute the environment.
[0046] A specific embodiment of the variable pitch bearing system of the present invention: The variable pitch bearing system includes a variable pitch bearing and a waste grease collection system. The structure of the waste grease collection system is the same as that of the above-mentioned variable pitch bearing waste grease collection system, and will not be repeated here.
[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.
Claims
1. Pitch bearing waste grease collection system, characterized in that A collection module for being arranged in a C shape on the pitch bearing and symmetrically covering each row of grease drain ports near the near point; the collection module includes: A waste grease collection pipe for collecting and storing waste grease; A waste grease collection unit for being correspondingly installed at each row of grease drain ports near the near point of the pitch bearing, including a tee joint, one interface of the tee joint is used for connecting with the corresponding grease drain port, and the other two interfaces are respectively used for connecting the waste grease collection pipe; There are two oil collecting bottles, which are respectively communicated with the outer ends of the waste grease collection pipes at both ends of the collection module, and an air vent communicating with the atmosphere is arranged in the oil collecting bottle; When collecting waste grease, the waste grease enters the waste grease collection pipe through the tee joint, squeezes the air in the collection module towards the oil collecting bottle and discharges it through the air vent.
2. The pitch bearing waste grease collection system according to claim 1, characterized in that An exhaust pipe is arranged at the bottom of the oil collecting bottle, the upper end of the exhaust pipe extends towards the bottle mouth of the oil collecting bottle, and the lower end communicates with the atmosphere.
3. The pitch bearing waste grease collection system according to claim 1, characterized in that, The bottle mouth of the oil collecting bottle is connected with the corresponding waste grease collection pipe through an oil pipe joint.
4. The pitch bearing waste grease collection system according to claim 3, characterized in that, The oil collecting bottle includes a bottle body and a bottle cap, the oil pipe joint is installed on the bottle cap, and the bottle cap and the bottle body are connected by a thread with a loosening prevention structure.
5. The pitch bearing waste grease collection system according to any one of claims 1-4, characterized in that The tee joint is connected with the grease drain port by a thread.
6. The pitch bearing waste grease collection system according to claim 5, characterized in that The tee joint is connected with the waste grease collection pipe by a hoop.
7. Pitch bearing system, comprising a pitch bearing and a waste grease collection system, characterized in that, The waste grease collection system includes a collection module for being arranged in a C shape on the pitch bearing and symmetrically covering each row of grease drain ports near the near point; the collection module includes: A waste grease collection pipe for collecting and storing waste grease; A waste grease collection unit is correspondingly installed at each row of grease drain ports near the near point of the pitch bearing, including a tee joint, one interface of the tee joint is used for connecting with the corresponding grease drain port, and the other two interfaces are respectively used for connecting the waste grease collection pipe; There are two oil collecting bottles, which are respectively communicated with the outer ends of the waste grease collection pipes at both ends of the collection module, and an air vent communicating with the atmosphere is arranged in the oil collecting bottle; When collecting waste grease, the waste grease enters the waste grease collection pipe through the tee joint, squeezes the air in the collection module towards the oil collecting bottle and discharges it through the air vent.
8. The pitch bearing system according to claim 7, characterized in that, An exhaust pipe is arranged at the bottom of the oil collecting bottle, the upper end of the exhaust pipe extends towards the bottle mouth of the oil collecting bottle, and the lower end communicates with the atmosphere.
9. The pitch bearing system according to claim 7, characterized in that The bottle mouth of the oil collecting bottle is connected with the corresponding waste grease collection pipe through an oil pipe joint.
10. The pitch bearing system according to claim 9, characterized in that, The oil collecting bottle includes a bottle body and a bottle cap, the oil pipe joint is installed on the bottle cap, and the bottle cap and the bottle body are connected by a thread with a loosening prevention structure.
11. The pitch bearing system according to any one of claims 7-10, characterized in that, The tee joint is connected with the grease drain port by a thread.
12. The pitch bearing system according to claim 11, wherein, The tee joint is connected with the waste grease collection pipe by a hoop.