CN220134117U - Wind-powered electricity generation becomes oar bearing waste oil collecting system - Google Patents
Wind-powered electricity generation becomes oar bearing waste oil collecting system Download PDFInfo
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- CN220134117U CN220134117U CN202320686330.5U CN202320686330U CN220134117U CN 220134117 U CN220134117 U CN 220134117U CN 202320686330 U CN202320686330 U CN 202320686330U CN 220134117 U CN220134117 U CN 220134117U
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- 239000002699 waste material Substances 0.000 title claims abstract description 54
- 230000005611 electricity Effects 0.000 title description 2
- 239000004519 grease Substances 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The utility model relates to a waste oil collecting system of a wind power variable pitch bearing, which aims to solve the problems that a pipeline is twisted, and a power device arranged on an inner ring of the bearing is easy to collide and interfere with other parts on a hub. The device comprises a hydraulic power pump, a control oil way and a suction and fat removal device, wherein the mounting bracket comprises a first bracket and a second bracket, the first bracket is fixed on the surface of a hub disc, and the second bracket is fixed on an inner ring bearing of a variable-pitch bearing; the two-channel hydraulic rotary joint is connected in series to two control oil ways and is used for being installed at a set distance from the central axis of the variable pitch bearing, the axes of the two-channel hydraulic rotary joint are parallel to the central axis of the variable pitch bearing, the two-channel hydraulic rotary joint comprises a rotor part and a stator part, and the stator part is fixed relative to the first bracket; one fixed end of the telescopic rod is fixed relative to the second bracket, and the movable end of the telescopic rod is fixed relative to the rotor part; when the inner ring bearing of the variable pitch bearing rotates, the rotor part is driven to rotate around the axis of the rotor part and revolve around the central axis of the variable pitch bearing, and the telescopic rod moves in a telescopic way.
Description
Technical Field
The utility model relates to a waste oil collecting system of a wind power variable pitch bearing.
Background
Wind power generation is an important strategic layout for solving the energy balance and the electric power just needed in China, however, the blower is internally provided with a complex mechanical structure, and is affected by severe outdoor environment, so that a unit is easily impacted by wind power to generate faults. In actual operation, the main reasons for the shutdown of the wind turbine generator are concentrated on components such as a gear box, a generator, a rotor brake and the like, mostly caused by bearing damage. From SKF statistics of internationally known bearing manufacturers, it has been shown that under lubrication is one of the major contributors to bearing failure among many factors.
At present, a passive oil discharge mode is adopted for a wind turbine generator system bearing of a wind power plant, and the bearing is generally collected in a mode that oil collecting bottles (bags) are respectively arranged through a plurality of oil discharge holes distributed on the circumference of the bearing; the principle is as follows: when new grease is added, the new grease extrudes the waste grease from the bearing inner cavity, so that the waste grease is discharged out of the small holes and then is discharged into the oil collecting bottles; and then cleaning the oil collecting bottle regularly.
The general problem of waste oil removal is that at the initial stage of factory leaving of unit equipment, the viscosity of new oil injected soon is moderate, a small amount of waste oil can be collected from a waste oil collecting bottle, along with continuous separation and precipitation of basic thin oil in waste oil, the viscosity of waste oil is higher and higher, the waste oil is gradually adhered to an inner cavity of a bearing, an oil flow channel is also narrower and narrower until the inner cavity is blocked, the resistance is larger and larger, the sealing capacity of a bearing oil seal capable of bearing only 0.1-0.2 MPa pressure is exceeded, the oil seal at an orifice for filling new oil is burst, and the filled new oil flows out easily from the place.
The waste grease cannot be removed in time, and the bearing rollaway nest is filled with the waste grease which is hardened and disabled and the scraps generated by abrasion for a long time, so that the bearing cannot be lubricated, friction and abrasion are accelerated, rollaway nest abrasion and ball damage can occur after short-time work, friction resistance moment is rapidly increased, starting difficulty of a wind turbine generator is caused, and wind energy utilization rate is reduced. Serious lubrication deficiency and incapability of normally removing waste oil can cause serious mechanical damage to the bearing, further can cause the vibration of the whole machine to be aggravated, the service life of the whole machine is greatly shortened, the bearing is inevitably blocked after long-term lubrication is not obtained, and the bearing has to be replaced at high cost. The waste grease can not be removed in time, the bearing oil seal can be burst, and the newly injected grease overflows to pollute the host, the tower and the wind farm environment each time, so that the operation environment is deteriorated, the local ecological environment is damaged, and the operation and maintenance cost is increased. If the brake disc is polluted, the brake is invalid, and grease covers the electric radiator to overload the electric radiator, so that accidents such as short circuit, burning out and fire and explosion are easily caused.
In this regard, there are also difficulties faced by passive collection that have been attempted to be resolved by active collection. However, there are a number of difficulties in the collection of waste oil from pitch bearings: on one hand, the oil drain hole of the pitch bearing is arranged on the bearing inner ring, the bearing inner ring rotates relative to the hub, and if the power device is placed on the hub, an oil pipe, a circuit and the like led to the oil drain hole by the power device can be twisted; if the power device and the pipeline are all arranged on the bearing inner ring, on one hand, the installation space on some small bearing inner rings may be insufficient, and on the other hand, when the power device arranged on the bearing inner rings rotates, the power device is easy to collide and interfere with other parts due to the complex structure and narrow space in the hub.
Disclosure of Invention
The utility model aims to provide a waste oil collecting system of a wind power variable pitch bearing, which is used for solving the technical problems that a pipeline is twisted and a power device arranged on an inner ring of the bearing is easy to collide and interfere with other parts on a hub in the existing active waste oil collecting system of the variable pitch bearing.
The technical scheme of the utility model is as follows: a wind power variable pitch bearing waste oil collection system comprises:
the hydraulic power pump is used for being arranged on the hub and comprises two oil ports, and when one oil port pumps hydraulic power oil outwards, the other oil port guides the hydraulic power oil flowing in from outside to the oil tank;
the control oil paths are two and are respectively connected with the two oil ports;
the grease sucking and discharging device is communicated with the two control oil ways and is used for being arranged at the oil drain hole of the inner ring bearing of the pitch bearing;
the mounting bracket comprises a first bracket and a second bracket, wherein the first bracket is fixed on the surface of the hub disc, and the second bracket is fixed on an inner ring bearing of the variable-pitch bearing;
the two-channel hydraulic rotary joint is connected in series to two control oil ways and is used for being installed at a set distance from the central axis of the pitch bearing, the axes of the two-channel hydraulic rotary joint are parallel to the central axis of the pitch bearing, the two-channel hydraulic rotary joint comprises a rotor part and a stator part, and the stator part is fixed relative to the first bracket;
the fixed end of the telescopic rod is fixed relative to the second bracket, and the movable end of the telescopic rod is fixed relative to the rotor part;
when the inner ring bearing of the variable pitch bearing rotates, the rotor part is driven to rotate around the axis of the rotor part and revolve around the central axis of the variable pitch bearing, and the telescopic rod moves in a telescopic way.
Further, three groups of waste oil collecting units are connected to the two control oil paths and are respectively used for sucking waste oil from the variable pitch bearings on the three surfaces of the hub, and each group of waste oil collecting units comprises one two-channel hydraulic rotary joint and a plurality of oil sucking and discharging devices.
Further, the two-channel hydraulic rotary joint of each group of waste oil collecting units is communicated with the two control oil ways through two tee joints respectively.
Further, each set of waste oil collection units includes a pressure sensor.
Further, the pressure sensor is connected with a control module of the hydraulic power pump through an electric wire, and the electric wire is used for penetrating through a lightning protection assembly installed at the central axis of the pitch bearing.
Further, the pressure sensor is connected with a control module of the hydraulic power pump through an electric wire, an electric slip ring is arranged on the electric wire, and the electric slip ring and the two-channel hydraulic rotary joint are installed on the first bracket in parallel.
The utility model has the beneficial effects that: when the wind power pitch bearing waste oil collecting system is used, the power pump is arranged on the surface of the hub, the grease sucking and discharging devices are respectively arranged on the oil discharging holes of the inner ring of the pitch bearing, the two-channel hydraulic rotary joint is eccentrically arranged near the central axis of the pitch bearing through the first bracket so as to avoid the lightning protection component originally arranged on the central axis of the pitch bearing, the second bracket is fixed on the inner ring of the pitch bearing and is connected with the rotor parts of the two-channel hydraulic rotary joint through the telescopic rod, the two control oil ways led out by the power pump can be led into the inner ring of the pitch bearing along the first bracket and the second bracket, and the two control oil ways can not twist due to the rotation of the inner ring of the pitch bearing due to the serial connection of the two-channel hydraulic rotary joint. The hydraulic power oil of the power pump continuously enters the second section of the control oil path along with the first section of the control oil path after passing through the two-channel hydraulic rotary joint, and then enters the grease sucking and discharging device to control the sucking action of the grease sucking and discharging device, so that the waste grease in the variable pitch bearing is sucked into an oil collecting bottle of the grease sucking and discharging device. Compared with the existing passive oil collecting bottle (bag) mode, the active pumping mode is adopted, so that waste lubricating grease in the bearing can be effectively pumped out, and the pumping effect is remarkably improved; compared with the existing active suction mode of installing the power pump on the inner ring of the pitch bearing, the active suction mode is not limited by the size near the pitch bearing and can not collide and interfere with other parts near the inner ring. Meanwhile, the problem that a waste oil collecting system cannot be installed due to the fact that the lightning protection component is installed at the central axis of the variable pitch bearing is effectively solved through the telescopic rod, and the problem of oil path transmission between the moving part and the fixed part is solved through the two-channel hydraulic rotary joint.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a wind turbine pitch bearing used oil collection system according to the present utility model;
FIG. 2 is a perspective view of the arrangement of a wind turbine pitch bearing waste oil collection system on one of the faces of the hub;
FIG. 3 is a schematic diagram of the working principle of a two-channel hydraulic rotary joint and a telescopic rod;
FIG. 4 is a perspective view of a two-way hydraulic swivel;
FIG. 5 is a cross-sectional view of FIG. 4;
in the figure: 1-a hydraulic power pump, 2-a two-channel hydraulic rotary joint, 21-a rotor part, 22-a stator part, 23-a rotating end oil port, 24-a fixed end oil port, 25-a bolt hole and 26-a rotating stopping hole, wherein 3-1 to 3-4 are a suction and fat discharging device, 4-a variable pitch bearing, 41-an inner ring, 42-an outer ring, 43-a central axis, 5-a pressure sensor, 6-a three-way joint and 7-a control oil way; 8-hubs, 10-first brackets, 20-second brackets and 30-telescopic rods.
Description of the embodiments
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present utility model are described in further detail below in connection with the examples.
The utility model relates to an embodiment of a waste oil collecting system for a wind power variable pitch bearing, which comprises the following components: as shown in fig. 1-3, the hydraulic power pump comprises a hydraulic power pump 1, a control oil way 7, a fat sucking and draining device, a mounting bracket, a two-channel hydraulic rotary joint 2 and a telescopic rod 30.
The hydraulic power pump 1 is of a structure in the prior art and is used for being installed on a hub 8 and comprises a motor, a monitor, a transmission part, a pump head, an oil tank, a two-position four-way valve and the like, hydraulic power oil is installed in the oil tank, the pump head is provided with two oil ports, when one oil port pumps the hydraulic power oil outwards, the other oil port guides the hydraulic power oil flowing in from outside to the oil tank, and the two-position four-way valve can be controlled by the monitor to switch the inlet and outlet sequences of the two oil ports.
The control oil ways 7 are two and are respectively connected with the two oil ports, and the control oil ways 7 are oil pipes.
The oil suction and exhaust device is a two-oil-way control oil suction and exhaust device, is communicated with the two control oil ways 7 and is used for being arranged at an oil drain hole of the inner ring 41 bearing of the pitch bearing 4; the moving direction of the plunger in the suction and exhaust grease device can be controlled by controlling the two control oil ways 7, so that the waste grease in the variable-pitch bearing 4 is sucked and pumped into an oil collecting bottle connected with the waste grease.
As shown in fig. 2, the mounting bracket comprises a first bracket 10 and a second bracket 20, wherein the first bracket 10 is fixed on the disk surface of the hub 8, and the second bracket 20 is fixed on an inner ring 41 bearing of the pitch bearing 4; the first bracket 10 comprises a cross plate, a vertical plate and a supporting rib plate which are formed by metal sheet metal in a manufacturing mode, and the supporting rib plate is obliquely connected between the cross plate and the vertical plate to form a stable supporting frame structure, and in order to improve strength, a plurality of bending steps can be arranged to improve strength and rigidity. The second bracket 20 is L-shaped in its entirety, with one part fixed to the inner ring 41 of the pitch bearing 4 and the other part extending radially of the pitch bearing 4 and pointing towards the central axis 43 of the pitch bearing 4.
The two-channel hydraulic rotary joint 2 is a prior art, for example, one of which is a patent with the publication number CN214889595U, and the present embodiment adopts the structure shown in fig. 4 and 5. The rotor type variable-pitch rotor comprises a cylindrical stator part 22 and a rotor part 21 sleeved at one end of the stator part 22, wherein in the relative rotation process of the two parts, two channels in the two parts can be correspondingly communicated one by one, the two channels are connected in series on two control oil ways 7 and are used for being installed at a set distance from a central axis 43 of a variable-pitch bearing 4, the axis of a two-channel hydraulic rotary joint 2 is parallel to the central axis 43 of the variable-pitch bearing 4, the rotor type variable-pitch rotor comprises the rotor part 21 and the stator part 22, and the stator part 22 is fixed relative to a first bracket 10 through bolt holes 25 of the stator part; referring specifically to fig. 2 and 3, since the lightning protection assembly is disposed at the central axis 43 of the pitch bearing 4, the two-channel hydraulic rotary joint 2 cannot be directly disposed at the central axis 43, but is eccentrically disposed near the central axis 43.
The fixed end of the telescopic rod 30 is fixed to the second bracket 20, and the movable end is fixed to the rotor portion 21 through the rotation stopping hole 26.
When the inner ring 41 of the pitch bearing 4 rotates, the rotor 21 is driven to rotate around the axis of the rotor and revolve around the central axis 43 of the pitch bearing 4, and the telescopic rod 30 moves in a telescopic manner. Wherein the outer ring 42 of the pitch bearing 4 is fixed relative to the hub 8 and the inner ring 41 is fixed relative to the blades.
As shown in fig. 1, three sets of waste oil collecting units are connected to the two control oil paths 7, and are respectively used for sucking waste oil from the pitch bearing 4 on the three faces (the 1# face, the 2# face and the 3# face) on the hub 8, and each set of waste oil collecting units comprises a two-channel hydraulic rotary joint 2 and a plurality of oil sucking and draining devices. The two-channel hydraulic rotary joint 2 of each group of waste oil collecting units is respectively communicated with two control oil ways 7 through two tee joints 6. Each set of waste oil collection units comprises a pressure sensor 5. The pressure sensor 5 is connected with the control module of the hydraulic power pump 1 by means of an electric wire which is used to pass through a lightning protection assembly mounted at the centre axis 43 of the pitch bearing 4.
In other embodiments, the pressure sensor 5 is connected to the control module of the hydraulic power pump 1 by means of an electrical wire, on which an electrical slip ring is arranged, which is mounted in parallel with the two-channel hydraulic swivel 2 on the first bracket 10.
When the waste oil collecting system of the wind power variable pitch bearing 4 is used, a power pump is arranged on a hub disc surface, the grease sucking and discharging devices are respectively arranged on oil discharging holes of an inner ring 41 of the variable pitch bearing 4, the two-channel hydraulic rotary joint 2 is eccentrically arranged near the central axis 43 of the variable pitch bearing 4 through the first bracket 10 so as to avoid a lightning protection component originally arranged on the central axis 43 of the variable pitch bearing 4, the second bracket 20 is fixed on the inner ring 41 of the variable pitch bearing 4 and is connected with a rotor part 21 of the two-channel hydraulic rotary joint 2 through the telescopic rod 30, two control oil ways 7 led out by the power pump can be led into the inner ring 41 of the variable pitch bearing 4 along the first bracket 20 and the second bracket 20, and due to the serial connection of the two-channel hydraulic rotary joint 2, the two control oil ways 7 cannot twist due to the rotation of the inner ring 41 of the variable pitch bearing 4, meanwhile, the two-channel hydraulic rotary joint 2 cannot be arranged at the central axis 43 of the variable pitch bearing 4 but is arranged so as to make up for the eccentric position change due to the eccentric setting, and the setting of the telescopic rod 30 can be very good, when the two-channel hydraulic rotary joint 2 is in a state of closest to the telescopic rod 30 is in a state of the telescopic rod 30, and is in a state of being closest to the telescopic rod 30. The hydraulic power oil of the power pump passes through the two-channel hydraulic rotary joint 2 along with the first section of the control oil circuit 7, then continuously enters the second section of the control oil circuit 7, and then enters the grease sucking and discharging device to control the sucking action of the grease sucking and discharging device, so that the waste lubricating grease in the variable pitch bearing 4 is sucked into an oil collecting bottle of the grease sucking and discharging device. Compared with the existing passive oil collecting bottle (bag) mode, the active pumping mode is adopted, so that waste lubricating grease in the bearing can be effectively pumped out, and the pumping effect is remarkably improved; compared with the prior active suction mode of installing the power pump on the inner ring 41 of the pitch bearing 4, the active suction mode is not limited by the size near the pitch bearing 4 and does not collide and interfere with other parts near the inner ring 41. Meanwhile, the problem that the waste oil collecting system cannot be installed due to the fact that the lightning protection component is installed at the central axis 43 of the variable pitch bearing 4 is effectively solved through the telescopic rod 30, and the problem of oil path transmission between the moving part and the fixed part is solved through the two-channel hydraulic rotary joint 2.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. A wind power variable pitch bearing waste oil collection system comprises:
the hydraulic power pump is used for being arranged on the hub and comprises two oil ports, and when one oil port pumps hydraulic power oil outwards, the other oil port guides the hydraulic power oil flowing in from outside to the oil tank;
the control oil paths are two and are respectively connected with the two oil ports;
the grease sucking and discharging device is communicated with the two control oil ways and is used for being arranged at the oil drain hole of the inner ring bearing of the pitch bearing;
characterized by further comprising:
the mounting bracket comprises a first bracket and a second bracket, wherein the first bracket is fixed on the surface of the hub disc, and the second bracket is fixed on an inner ring bearing of the variable-pitch bearing;
the two-channel hydraulic rotary joint is connected in series to two control oil ways and is used for being installed at a set distance from the central axis of the pitch bearing, the axes of the two-channel hydraulic rotary joint are parallel to the central axis of the pitch bearing, the two-channel hydraulic rotary joint comprises a rotor part and a stator part, and the stator part is fixed relative to the first bracket;
the fixed end of the telescopic rod is fixed relative to the second bracket, and the movable end of the telescopic rod is fixed relative to the rotor part;
when the inner ring bearing of the variable pitch bearing rotates, the rotor part is driven to rotate around the axis of the rotor part and revolve around the central axis of the variable pitch bearing, and the telescopic rod moves in a telescopic way.
2. The wind power pitch bearing waste oil collecting system according to claim 1, wherein three sets of waste oil collecting units are connected to the two control oil paths, and each set of waste oil collecting units is used for sucking waste oil into pitch bearings on three surfaces of the hub, and each set of waste oil collecting units comprises one two-channel hydraulic rotary joint and a plurality of oil sucking and draining devices.
3. The wind power pitch bearing waste oil collecting system according to claim 2, wherein the two-channel hydraulic rotary joint of each group of waste oil collecting units is respectively communicated with the two control oil paths through two three-way joints.
4. A wind power pitch bearing waste oil collection system according to claim 2 or 3, wherein each set of waste oil collection units comprises a pressure sensor.
5. The wind power pitch bearing waste oil collection system according to claim 4, wherein the pressure sensor is connected to the control module of the hydraulic power pump by a wire, and the wire is used for passing through a lightning protection assembly installed at the central axis of the pitch bearing.
6. The wind power variable pitch bearing waste oil collecting system according to claim 4, wherein the pressure sensor is connected with a control module of the hydraulic power pump through an electric wire, an electric slip ring is arranged on the electric wire, and the electric slip ring and the two-channel hydraulic rotary joint are installed on the first bracket in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320686330.5U CN220134117U (en) | 2023-03-31 | 2023-03-31 | Wind-powered electricity generation becomes oar bearing waste oil collecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320686330.5U CN220134117U (en) | 2023-03-31 | 2023-03-31 | Wind-powered electricity generation becomes oar bearing waste oil collecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220134117U true CN220134117U (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320686330.5U Active CN220134117U (en) | 2023-03-31 | 2023-03-31 | Wind-powered electricity generation becomes oar bearing waste oil collecting system |
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| Country | Link |
|---|---|
| CN (1) | CN220134117U (en) |
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2023
- 2023-03-31 CN CN202320686330.5U patent/CN220134117U/en active Active
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