TW201319380A - Method, apparatus and system for reducing vibration in a rotary system of a power generator - Google Patents

Abstract

A method of reducing vibration in a rotary system of a power generator, comprising balancing said rotary system, characterized by providing a rotational element comprising a chamber having a fulcrum on a rotational axis of said rotational element, comprising a circumferential balancing area and being partially filled with an amount of a thixotropic balancing substance. A corresponding apparatus and system.

Description

Method, device and system for reducing vibration of generator rotating system

The specific embodiments of the invention described herein are generally related to reducing vibration, and more particularly to a method, apparatus, and system for reducing vibration in a rotating system of a generator, such as an electric generator.

A generator is a machine used to generate another form of energy from one form of energy, such as electrical energy, or electricity, from chemical or mechanical energy. Chemical energy can be released from burning fuels such as gases (such as natural gas or biogas), oil, and coal. Mechanical energy can be used as a potential energy (such as in the form of water in a reservoir) or as kinetic energy (such as in the form of wind). Thus, the generator can operate directly or indirectly, such as burning fuel to produce steam, and the steam drives the generator to produce electricity. Power generation, ie energy production, is the conversion of power, ie the conversion of energy.
The generator can be contained within a housing, such as a box or building, such as a factory. The generator may be included in a system, such as a power storage system, for receiving and storing excess power during over-supply, and releasing and transmitting power during peak demand.
The generator can include a rotor. To generate electricity with a frequency of 50 Hz, the rotor can be rotated at 50 revolutions per second, ie 3000 revolutions per minute (rpm). To generate electricity with a frequency of 60 Hz, the rotor can be rotated at 60 revolutions per second, or 3,600 revolutions per minute (rpm). The generator can produce electricity ranging from a few watts (W) or kilowatts (KW) to millions of watts (MW) or several gigawatts (GW).
Vibration is a major factor in generators. Vibration negatively affects durability, ie service interval and life, safety and comfort. Regarding safety, vibration has a direct effect on stability and can cause fatigue and damage to materials. Regarding comfort, vibration has a direct effect on noise and can increase the degree of noise. Furthermore, the noise generated by the vibrations can be amplified by the system containing the generator.
The main source of vibration is the rotating system of the generator, including the drive unit and the power generation unit. The rotating system can include a shaft, a bearing, a rotor, or a combination thereof. The vibrations may include rotational speed dependent vibrations that are typically derived from the rotating system. Vibration can damage the rolling element bearing or seal, for example as a bearing, for example a ball bearing or a rolling bearing.
In order to reduce vibration, the rotating system can be balanced at the beginning by selectively removing material from the rotating elements of the rotating system during production of the rotating system such that its center of gravity (CofG) moves to its rotation as a fulcrum Center (CofR). Removing the material can include wiping (eg, grinding away) the material from the rotating element or drilling a hole in the rotating element, or a combination thereof. However, this removal step takes time in production, especially in mass production, and increases costs.
In addition, vibrations in the generator typically increase over time due to wear and rupture of the rotating system, or accumulation of particles (eg, dust) on the rotor. In more detail, due to wear and breakage of the rotating element, its CofG moves away from CofR over time, resulting in an imbalance of vibration.
In wind turbine generators (WTG), the rotating system further includes blades. The blade may comprise, for example, wood or a composite material such as a fiberglass reinforced material or a carbon fiber reinforced material. The blades change over time and they tend to become heavier when in use. Due to hard particles, such as sand, there is wear or corrosion of the blades. Furthermore, due to the lightweight construction of the blade, the air chamber in the blade may be filled with water, particularly where the blade skin becomes porous. This is known as the problem of influent or residual water. In addition, they can be repaired during the life of the blade. Therefore, the center of gravity of the blade (CofG) moves with time. In general, this movement is greater and therefore more severe than the chord center of gravity, i.e., the leading edge to trailing edge direction of the blade, for the span center of gravity, i.e., the hub to blade end direction of the blade. When the chord CofG is positioned behind the ideal CofG, the rotational torque is after the ideal CofG. When the chord CofG is positioned before the ideal CofG, the rotational moment is before the ideal CofG. Therefore, the vibration in the rotating system is increased.
DE 198 57 646 discloses a method for balancing a tire by introducing a balancing substance into the tire, comprising placing a substance having a defined characteristic, shape, geometry and weight in the tire, and moving the imbalance by rotating the tire point.
WO 2010/003988 discloses a method for reducing vibration in a rotating system of a flying tool, such as an aircraft or a rotorcraft, such as a helicopter.
WO 2011/061228 discloses a method of reducing vibration in a rotating system of a vessel, such as a cargo ship.
WO 2011/061227 discloses a method of reducing vibration in a rotating system of a motor vehicle, such as an automobile.
WO 2009/140022 discloses a machine comprising: a magnetic thrust bearing comprising: a rotor portion; a stator portion; and an outer casing substantially surrounding the stator portion and the rotor portion; the rotor portion comprising a thrust disk, the thrust disk A perimeter is adapted to be attached to and rotated with the rotor, the thrust disk defining a first side of the thrust disk and a second side of the thrust plate, the first side being opposite the second side.
WO 2010/006859 discloses a bearing arrangement and a bearing block consisting of a magnetic radial bearing, a non-contact support for a rotating shaft of a rotating machine, and a safety bearing for gripping the rotating shaft. Thus, both bearings are permanently connected to each other in an axially aligned manner, and the two bearings are elastically suspended with respect to the bearing housing, the machine housing or the base of the rotating machine.
For these and other reasons, there is a need for the invention as set forth in the specific embodiments described below.

It is an object of the present invention to provide a method, apparatus and system for reducing vibration in a rotating system of a generator.
One aspect of the invention is a method of reducing vibration in a rotating system 120, 130, 140, 150 of a generator 100, comprising balancing the rotating system 120, 130, 140, 150, characterized in that a rotating element 120, 124 is provided 130, 135, 140, 144, 150; 200, comprising a chamber 210 having a fulcrum on a rotating shaft 240 of the rotating element 120, 124, 130, 135, 140, 144, 150; 200, the chamber 210 A peripheral balance region 220 is included and partially filled with a quantity of thixotropic balance material 230.
Another aspect of the invention is a method, further comprising rotating the rotating element 120, 124, 130, 135, 140, 144, 150; 200 about a rotational axis 240 such that the thixotropic balancing substance 230 is liquefied and along The peripheral balance region 220 disperses itself, and the imbalance of the rotating elements 120, 124, 130, 135, 140, 144, 150; 200 is reduced.
Another aspect of the invention is a method wherein the rotating shaft 240 is oriented horizontally; or the rotating shaft 240 is oriented vertically.
Another aspect of the invention is a method wherein the rotating element 120, 124, 130, 135, 140, 144, 150; 200 is the original element of the rotating system 120, 130, 140, 150, the rotating system An alternative element of 120, 130, 140, 150 or a complementary element of the rotating system 120, 130, 140, 150; the rotating element 130 is a hollow shaft or a tubular shaft; the rotating element 130 is a movable joint axis, such as 10,000 Axis; or a combination thereof.
Another aspect of the invention is a method wherein the supplemental element is disc shaped; or the supplemental element is annular.
Another aspect of the invention is a method wherein the rotating element 120, 124, 130, 135, 140, 144, 150; 200 is a shaft 130; the rotating element 120, 124, 130, 135, 140, 144, 150; 200 is the rotor 144 of the generator 100; the rotating elements 120, 124, 130, 135, 140, 144, 150; 200 are gears; the rotating elements 120, 124, 130, 135, 140, 144 150; 200 is a bearing 135; or a combination thereof.
Another aspect of the invention is a method wherein the chamber 210 is wheel-shaped or annular, or cylindrical; the chamber 210 has a rectangular, square, semi-circular, bell-shaped or circular cross section The chamber 210 has a proximity of approximately 0.005 m and approximately 2 m, or between approximately 0.01 m and approximately 1 m, or between approximately 0.02 m and approximately 0.5 m, or approximately 0.05 m and approximately 0.2 Between m, or a diameter of approximately 0.1 m; the chamber 210 has a proximity of approximately 0.01 m and approximately 1 m, or between approximately 0.02 m and approximately 0.5 m, or approximately 0.05 m and approximately 0.2 m Between, or nearly 0.1 m in length; or a combination thereof.
Another aspect of the invention is a method wherein the amount of the thixotropic balancing substance 230 is between approximately 0.001 kg and approximately 1000 kg, or between approximately 0.002 kg and approximately 500 kg, or at approximately 0.005 Kg and close to 200 kg, or close to 0.01 kg and close to 100 kg, or close to 0.02 kg and close to 50 kg, or close to 0.05 kg and close to 20 kg, or close to 0.1 kg and Near 10 kg, or close to 0.2 kg and close to 5 kg, or close to 0.5 kg and close to 2 kg, or close to 1 kg; the chamber 210 is close to 1% and close to 90% The thixotropic balancing substance 230 is filled, or a combination thereof, in an amount of between approximately 10% and approximately 80%, or between approximately 25% and approximately 75%, or approximately 50%.
Another aspect of the invention is a device for reducing vibration in a rotating system 120, 130, 140, 150 of a generator 100, characterized by a rotating element 120, 124, 130, 135, 140, 144, 150; a chamber 210 having a fulcrum on a rotating shaft 240 of the rotating member 120, 124, 130, 135, 140, 144, 150; 200, the chamber 210 including a peripheral balancing region 220, and balanced by a number of thixotropic Substance 230 is partially filled.
Yet another aspect of the present invention is a rotating system 120, 130, 140, 150 of a generator 100 for reducing vibrations in the rotating system 120, 130, 140, 150, characterized by rotating elements 120, 124, 130, 135, 140, 144, 150; 200 includes a chamber 210 having a fulcrum on a rotating shaft 240 of the rotating member 120, 124, 130, 135, 140, 144, 150; 200, the chamber 210 including a peripheral balance Region 220 is partially filled with a quantity of thixotropic balancing substance 230.

In the detailed description of the specific embodiments, reference is made to the accompanying drawings, the To best illustrate the structure of this particular embodiment, the drawings included herein are a schematic representation of inventive items. Thus, the actual appearance of the fabricated structure may be different, but still incorporate the necessary structure of the specific embodiment. Moreover, the drawings only show the structure required to understand this particular embodiment. Additional structures known in the art are not included to maintain clarity of the drawing. It will also be appreciated that the features and/or elements depicted herein are depicted in particular dimensions relative to each other for purposes of simplicity and ease of understanding, and the actual dimensions may be substantially different than the dimensions depicted herein. In the drawings, like reference numerals refer to the substantially The detailed description is intended to depict various aspects of the invention in detail Other embodiments may be utilized, and structural, logical or electrical changes or combinations thereof may be made without departing from the scope of the invention. In addition, it is to be understood that the various embodiments of the invention are different, but are not necessarily mutually exclusive. For example, a particular element, feature, structure, characteristic, singular or step, or a group of elements, features, structures, features, integers or steps described in a particular embodiment can be included in other embodiments. In addition, it is to be understood that the specific embodiments of the invention may be implemented using different techniques. Similarly, the term "exemplary" is used merely as an example, and not as optimal or optimal. Therefore, the detailed description is not to be taken in a limiting sense.

From the beginning to the end of this specification, the words "comprise" or variations, such as "comprises" or "comprising", are used to imply the inclusion of specified elements, integers or steps. Or a group of elements, integers or steps, but does not exclude any other elements, integers or steps, or groups of elements, integers or steps.
The terms "including", "have", "with" or variations thereof may be used in the description and claims. It is to be understood that this term is intended to be included in a manner similar to the term "contains".
In the description and patent application, the terms "coupled" and "connected" and derived terms, such as "communication coupling", may be used. It is to be understood that these terms are not intended as consent to each other. Rather, in particular embodiments, "connected" may be used to indicate that two or more elements are in direct physical or electrical contact with each other. However, "coupled" may also mean that two or more elements are not in direct contact with each other, but still cooperate or interact with each other.
The words "upper", "lower", "first", "second" and the like may be used for descriptive purposes only, and are not to be construed as limiting. Particular embodiments of the devices or articles described herein can be made, used, or shipped in a variety of locations and orientations.
Figure 1 shows a schematic diagram of a generator 100 to which the present invention is applicable. The generator 100 can include a housing 110. The outer casing 110 can be a box or a building, such as a factory. The generator 100 includes a drive unit 120 for providing rotational energy at a shaft 130 having a fulcrum on the rotating shaft 240. As indicated in FIG. 1 , the drive unit 120 can include a turbine having one, two, three or more turbines 124 and stored in the turbine casing 122 , and coupled to the turbine casing 122 and extending therethrough An exhaust pipe 126 of the outer casing 110. The turbine can typically be powered by a gas such as natural gas or biogas or steam. However, the drive unit 120 can be powered by other sources of power, including, for example, hydraulic, aerodynamic or wind power. The drive unit 120 can include an internal combustion engine that is powered by, for example, a gas (eg, natural gas or biogas), oil, gasoline, or diesel. The generator 100 further includes a power generation unit 140 coupled to the drive unit 120 for receiving rotational energy and generating electricity, such as electricity. As indicated in FIG. 1, the power generating unit 140 can include a rotor 144 that is stored in the stator 142 and coupled to the shaft 130. The generator 100 can include one, two, three or more support members 180 having bearings 135 along which the shaft 130 is configured for supporting the shaft 130. The rotating elements of the generator 100, such as the turbine 124, the shaft 130, the bearings 135, and the rotor 144, form the rotating system of the generator 100. The rotating system of the generator 100 can optionally include a gearbox 150 disposed between the drive unit 120 and the power generating unit 140 for coupling the drive unit 120 and the power generating unit 140. The gearbox can be an indexed gearbox, which is a shifting gearbox. The gearbox 150 can convert the rotational speed of the drive unit 120 to the rotational speed of the power generating unit 140. The gearbox 150 can increase or decrease the speed. The gearbox 150 may or may not change the direction of rotation. The gearbox 150 redirects the rotational energy to the other direction. The gearbox 150 can distribute the rotational energy between one, two, three or more drive units 120 and one, two, three or more power generating units 140.
Generator 100 can be oriented horizontally, vertically, or at any suitable angle.
The generator 100 generates electrical power, ie, electrical power, for example in the form of an alternating voltage and an alternating current, such as an alternating voltage having a frequency of 50 Hz or 60 Hz and an alternating current. To generate power having a frequency of 50 Hz, the shaft 130 and the rotor 144 can be rotated by 50 revolutions per second, i.e., 3000 revolutions per minute (rpm). To generate power having a frequency of 60 Hz, the shaft 130 and the rotor 144 are rotated at 60 revolutions per second, i.e., 3600 revolutions per minute (rpm). The generator 100 can generate electricity in the range of a few watts (W) to several megawatts (GW), such as in the range of kilowatts (KW) to millions of watts (MW).
The generator 100 can convert primary energy (ie, input energy) directly into secondary energy (ie, output energy). Alternatively, the generator can convert the primary energy into the secondary energy indirectly, ie via one, two, three or more intermediate energies.
The drive unit 120 can be driven by chemical energy as primary energy.
The turbines 122, 124 are driven by a fluid that is an intermediate energy carrier, ie, a liquid or a gas (eg, air or steam, ie, a combination of gas and water vapor). The turbines 122, 124 can be heated by the steam generated by boiling the fuel by boiling the fuel, by using steam generated from the ground under pressure in the geothermal energy conversion, by using a solar parabolic trough or a solar tower to heat the heat. The transfer fluid (eg, molten salt) is driven by a small difference between the colder deep seawater and the warmer surface seawater in the Ocean Thermal Energy Conversion (OTEC), which includes gaseous, liquid, and solid fuels, such as fossil fuels, including carbon Hydrogen compounds, such as gases (including gas), oil (including oil shale and asphalt rock) or coal, and biogas and biomass, such as crops, wood (including wood chips) and waste, containing sewage or by nuclear fission or nuclear fusion Nuclear fuel. The turbines 122, 124, 126 may be hot gas turbines that are driven directly by gases produced by combustion gases or oils, such as natural gas or biogas. The generator 100 can be a double cycle generator wherein the gas turbines 122, 124, 126 are driven by a gas and the steam turbine (not shown) is driven by residual heat from the combustion gases for generating additional power.
The drive unit 120 can be driven by physical energy as primary energy. The drive unit 120 can be driven, for example, by rotational energy of rotational mass, compression energy of compressed gas (eg, air), or electrical power.
The turbines 122, 124 can be driven by renewable energy sources. In hydroelectric generator 100, the turbine may be driven by, for example, flowing water from a river or wastewater system, tidal water from the ocean, or falling water such as a reservoir containing dams, caves, and caves.
In WTG, the turbine can be driven by naturally occurring wind. In a solar updraft tower, the turbine can be driven by artificially generated wind in a chimney heated by sunlight.
When the primary energy is available and the secondary energy is to be consumed, the generator 100 can immediately generate the secondary energy from the primary energy. For example, the drive unit 120 of the generator 100 can generate a quantity of compressed air to drive the turbines 122, 124 and the power generation unit 140 that will generate electrical energy.
After the primary energy is already available, and the secondary energy is to be consumed, the generator 100 can generate secondary energy that is delayed from the primary energy. For example, when primary energy is available or less expensive, the drive unit 120 of the generator 100 can use the primary energy to generate and store a quantity of compressed air in a storage unit (not shown), and when electrical energy is to be Upon consumption, the quantity of compressed air can drive the turbines 122, 124 and the power generating unit 140 to produce electrical energy.
The generator 100 can receive and store secondary energy when there is residual or excess secondary power, or secondary power is less expensive, and the generator 100 can generate when the secondary energy is to be consumed or more expensive. And transmitting the secondary energy. For example, when electrical energy is available or less expensive, the drive unit 120 of the generator 100 can use the electrical energy to generate and store a quantity of compressed air in a storage unit (not shown), and when the electrical energy is to be When consumed or relatively expensive, the amount of compressed air can drive the turbines 122, 124 that will generate electrical energy and the power generating unit 140; or when electrical energy is available or less expensive, the drive unit 120 can use electrical energy While a certain amount of water is pumped from a storage unit (not shown) below the ground to a storage unit (not shown) on the ground, and when electrical energy is to be consumed or more expensive, the amount of water may fall. Returning to the storage unit (not shown) below the ground, thereby driving the turbines 122, 124 and the power generating unit 140 to generate electrical energy. Thus, the generator 100 can form part of an energy storage system. The energy storage system receives and transmits the same type of energy, such as electrical energy, and can generate power during peak demand.
Generator 100 can be stationary.
Generator 100 can be a power plant and can be coupled to a supply grid, such as a national supply grid. The generator 100 can form part of a thermoelectric co-generation unit (CHP) (ie, a total energy unit).
Additionally, generator 100 can be portable.
Therefore, it can be used at home, office, business, store or studio.
In addition, the generator 100 can be used in a movable manner.
The generator 100 can be used in a vehicle, such as a ground vehicle, such as a wheeled vehicle, in particular a bicycle, a car, a truck, a truck or a motorcycle, a tracked vehicle or a rail vehicle, in particular a train; a flying tool, such as an airplane; space a ship; or a ship, such as a ship. The generator 100 can be a generator for charging a battery, such as a rechargeable battery or a car battery of a vehicle, such as a car, or a generator for a bicycle. The generator 100 can form part of a braking system for recovery by converting kinetic energy into electrical energy, i.e., regenerating braking energy. The generator can produce power in the range of approximately 1 W to approximately 100 KW, such as in the range of approximately 10 W to approximately 10 KW, such as in the range of approximately 100 W to approximately 1 KW.
Therefore, among other things, the generator 100 can be used to generate and store energy, such as electrical energy, ie, electrical power.
According to a particular embodiment of the invention, one, two, three or more rotating elements 120, 124, 130, 135, 140, 144, 150 of the generator 100 comprise one, two, three or more in rotation The shaft 240 has a fulcrum chamber 210 that includes a peripheral balance region 220 and is partially filled with a quantity of thixotropic balancing material 230. The one, two, three or more rotating elements 120, 124, 130, 135, 140, 144, 150 comprising one, two, three or more chambers 210 may comprise metal (eg steel, titanium, Copper or aluminum) or composite materials (such as glass fiber reinforced materials or carbon fiber reinforced materials) or synthetic materials (such as plastic or plexiglass). The one, two, three or more rotating elements 120, 124, 130, 135, 140, 144, 150 comprising one, two, three or more chambers 210 may be substituted for the original rotating elements 120 of the rotating system , 124, 130, 135, 140, 144, 150. The one, two, three or more rotating elements 120, 124, 130, 135, 140, 144, 150 comprising one, two, three or more chambers 210 may be complementary components of the rotating system.
The chamber 210 can be dug in a rotating element, such as the rotor 144 or gear. The chamber 210 can be positioned in the shaft 130, such as a hollow shaft or tubular shaft, and extends partially or completely along the hollow shaft or tubular shaft, for example, substantially completely.
The peripheral equilibrium region 220 may comprise a nanostructure for improving the mobility and flow of the thixotropic balancing substance 230 formed, for example, of a material comprising nanoparticle (eg, a varnish), or imprinted in the Said on the peripheral balance area 220.
The thixotropic balance material 230 acts in the chamber 210. Due to the vibration, the thixotropic balance material 230 disperses itself along the peripheral equilibrium region 220 such that the CofG 250 faces, for example, the axis of rotation 120 of the rotating elements 120, 124, 130, 135, 140, 144, 150; 200 of the shaft 130 ( It moves for CofR) and reduces or minimizes or eliminates this vibration.
For a preferred embodiment of the present invention, FIG. 2 shows a cross-sectional view of the cylindrical chamber 210 at the beginning of time when the thixotropic balancing substance 230 partially fills the chamber 210. As shown in FIG. 2, the thixotropic balance material 230 can be uniformly dispersed along the peripheral balance region 220. For the vertical axis of rotation 240, the thixotropic balancing substance 230 can partially fill the chamber 210 to a uniform extent perpendicular to the axis of rotation 240. For the horizontal axis of rotation 240, the thixotropic balancing substance 230 can be partially filled with the chamber 210 to a uniform extent along the axis of rotation 240. However, the thixotropic balancing substance 230 can be partially filled into the chamber 210 using any other means. Due to the imbalance of the rotating element 200 or the rotating system, the CofG 250 is offset from the rotational axis 240 of the CofR.
For a preferred embodiment of the present invention, FIG. 3 shows a cross section of the cylindrical chamber 210 at a point in time when the balance region 220 is dispersed along the periphery of the chamber 210 to disperse the thixotropic balancing substance 230 such that the vibration is reduced. Figure. As the rotating element 200 rotates about the axis of rotation 240, the thixotropic balancing substance 230 liquefies and disperses itself along the peripheral balancing region 220 of the chamber 210 due to vibrations in the rotating system to reduce the rotation of the rotating element 200. Unbalanced and thus reduced vibration. The CofG 250 moves toward the rotating shaft 240 that is a CofR. The thixotropic balance material 230 can solidify and maintain its position and distribution on the peripheral equilibrium region 220 as the vibration is reduced. Therefore, its balance is continuously adjusted during the operation of the rotating system.
The amount of thixotropic balancing substance 230 can be between approximately 0.001 kg and approximately 1000 kg, or between approximately 0.002 kg and approximately 500 kg, or between approximately 0.005 kg and approximately 200 kg, or close to 0.01 kg and close Between 100 kg, or close to 0.02 kg and close to 50 kg, or close to 0.05 kg and close to 20 kg, or close to 0.1 kg and close to 10 kg, or close to 0.2 kg and close to 5 kg Between, or close to 0.5 kg and close to 2 kg, or close to 1 kg. Can be used between approximately 1% and approximately 90%, or between approximately 10% and approximately 80%, or between approximately 25% and approximately 75%, or nearly 50% of the thixotropic balancing substance 230 The chamber 210 is filled in quantities.

Figure 4 shows a cross-sectional view of a chamber 210 in a rotating element 200, 204 in accordance with yet another embodiment of the present invention. The chamber 210 is dug in the rotating element 200, 204, such as a flywheel, gear or additional element, such as a container or vessel. The chamber 210 is a wheel or a ring. The chamber 210 may have a cross section of a rectangle, a square (not shown), a semicircle (not shown), a bell (not shown), a circle (not shown), or the like.
Figure 5 shows a cross-sectional view of a chamber 210 in a rotating element 200, 204 in accordance with yet another embodiment of the present invention. Referring to Figure 4, the rotating elements 200, 204 include a central aperture 260. The central aperture 260 can be circular, square (not shown), hexagonal (not shown), or the like. The central bore 260 of the rotating element 200, 204 can receive a shaft for coupling the rotating element 200, 204 to a rotating system.
The rotating elements 200, 204 can include a rotor (not shown) of the generator, and the central bore 260 covers the shaft (not shown). In a preferred embodiment, the rotating elements 200, 204 can be injection molded in one, two, three or more portions and the chamber 210 can be sealed by a sealing member. The sealing element can be a sealing element that snaps in or snaps onto. In another preferred embodiment, the rotating element 200, 204 can be part of a rotating element of the generator 100, such as the turbine 124, the shaft 130 or the rotor 144, and the chamber 210 can be sealed by a sealing element. . The sealing element can be welded to the rotating element, for example using friction welding, laser welding or ultrasonic welding.
Figure 6 shows a cross-sectional view of a chamber 210 in another rotating element 200, 206 in accordance with yet another embodiment of the present invention. The chamber 210 is dug in the other rotating element 200, 206, such as a flywheel, gear or additional element, such as a container or vessel. The chamber 210 is cylindrical. The chamber 210 may have a cross section of a rectangle, a square (not shown), a semicircle (not shown), a bell (not shown), a circle (not shown), or the like.
Figure 7 shows a cross-sectional view of another chamber 210 in the rotating elements 200, 204 in accordance with yet another embodiment of the present invention. Referring to Figure 4, the rotating elements 200, 204 include an opening 270 that provides access to the chamber 210. The opening 270 can surround the circumference. The opening is located, for example, at a location where the balancing substance 230 is contained and maintained in the chamber 210.
Figure 8 shows a cross-sectional view of another chamber 210 in the rotating elements 200, 204 in accordance with yet another embodiment of the present invention. Referring to Figure 5, the rotating elements 200, 204 include an opening 270 as discussed with respect to Figure 7, which provides access to the chamber 210.
The rotating elements 200, 204 can include a rotating element of the generator 100 as described with respect to FIG.
Figure 9 shows a cross-sectional view of yet another chamber 210 in the rotating elements 200, 204 in accordance with yet another embodiment of the present invention. Referring to Figure 5, the rotating elements 200, 204 include openings 270 as discussed with respect to Figures 7 and 8, which are provided to the inlet of the chamber 210.
The rotating elements 200, 204 can include a rotating element of the generator 100 as described with respect to FIG.
Figure 10 shows a cross-sectional view of another chamber 210 in the rotating elements 200, 206 in accordance with yet another embodiment of the present invention. Referring to Figure 6, the rotating elements 200, 206 include an opening 270 as discussed with respect to Figure 7, which provides access to the chamber 210.
The thixotropic balance material 230 can be a thixotropic tire balance composition as disclosed in EP Patent Application No. 0 281 252 and the corresponding US Patent No. 4,867,792, the entire disclosure of which is incorporated herein by reference. The thixotropic tire balance composition has a yield stress value between 1 Pa and 260 Pa, and when the focus of the tire collides with the road surface, the tire can be balanced by being able to flow under the influence of the induced vibration.
The thixotropic balance material 230 can be a tire colloidal balance composition as disclosed in European Patent No. 0 557 365 and the corresponding US Patent No. 5,431,726, the entire disclosure of which is incorporated herein by reference. The tire colloidal balance composition has a storage modulus between 3000 and 15000 Pa and a specific gravity of less than 1000 kg/m ³ in a temperature range between -20 and +90 ° C, preferably, the storage modulus At about 9000 Pa, the tire can be balanced by being able to flow under the vibration caused by the imbalance in the wheel set. The composition preferably comprises a mixture of: 1) paraffin oil, polybutene oil, polyol ester or polyol ether; 2) hydrophobic or hydrophilic smoked; 3) polyalkyl methacrylate, styrene An ethylene-propylene block copolymer or a polyhydroxycarboxylic acid derivative; and an optional corrosion inhibitor and an antioxidant.
The thixotropic balance material 230 can be one of the tire balance compositions disclosed in the European Patent No. 1 196 299 B1 and the corresponding US Publication No. US 2005-0159534 A1 and US 2010-0252174 A1, the entire contents of which are incorporated herein by reference. For reference, the tire balancing composition has improved balance characteristics and comprises a viscoplastic colloid and a solid body having an average minimum dimension in the range of 0.5-5 mm; the average minimum dimension is preferably 1-4 mm, more Good is about 3 mm. When a layer is applied to the tire of a car, the composition acts by allowing the solid body to move through the gel and is concentrated in the area to counteract the imbalance. The solid body preferably has an average alpha ratio of their <= 2 between their minimum and their largest dimension, preferably a <= 1.5, especially about 1. The viscoplastic colloid preferably has a storage modulus (G') between 1000 Pa and 25000 Pa at 22 ° C, a loss modulus (G'' which is less than the storage modulus, and a temperature at 22 ° C. Critical yield stress above 3 Pa. The body can be shaped as an oblate or oblate ellipsoid, cylinder, rectangular parallelepiped or sphere, or a mixture of such bodies; they can have a range of 500-3000 kg/m ³ The apparent specific gravity is preferably 600-2000 kg/m ³ , especially 700-1000 kg/m ³ , especially 800-900 kg/m ³ ; they can be made of polyolefin, polystyrene, polyvinyl chloride, polyfluorene Made of amine, rubber or glass. The weight ratio between the solid body and the colloid is from 10:1 to 1:10, preferably from 5:1 to 1:5, especially from 2:1 to 3:1, for example from 1:1 to 1:2.
The thixotropic balance material 230 can be one of the viscoelastic tire balancing compositions disclosed in International Patent Application No. WO 2010/055097, the entire disclosure of which is incorporated herein in a glycol ether component comprising one or more ethanol/propylene glycol copolymer ethers of the general formula: (I) or general (II) or a mixture thereof RO{[CH(C _1-13 ) CH ₂ -O ] _m [CH2-CH2-O ] _n }H(I)R'-(O- {[CH(CHOCH ₂ -O ] _m [CH ₂ -CH ₂ -O ] _n }H) ₂ ( II), wherein R is hydrogen or an alkyl group of 2-8 carbon atoms; R' is an alkylene moiety of 2-8 carbon atoms, wherein the two substituents are not carried by the same carbon atom; m is the ethylene The molar percentage of propylene glycol in the alcohol/propylene glycol copolymer motif; and n is the molar percentage of ethylene glycol in the ethylene glycol/propylene glycol copolymer motif, wherein the ratio n:m is between 35:65 and 80:20 In the range; each ethylene glycol copolymer compound has an average molecular weight ranging from 2000 to 10000; and 2) 3 to 15% by weight of a smoldering colloidal blowing agent; the equilibrium composition is viscoelastic, and at 22 °C In the storage modulus (G ') between 1500 Pa and 5000 Pa, up to less than the loss modulus to the storage modulus of the switching frequency of 10-40 Hz (G ") and more than the critical yield stress of 2 Pa.
The thixotropic balance material 230 can be a composition for balancing a rotating system as disclosed in International Patent Application No. WO 2011/042549, the entire disclosure of which is incorporated herein by reference in its entirety a substance; characterized by a quantity of hydrophobic particles or nanoparticles dispersed in the amount of the thixotropic balance material.
The thixotropic balancing substance 230 can comprise a plurality of spheres. The ball may comprise a metal such as steel, titanium, copper or aluminum, a composite material such as alumina or ceramic, or a plastic. The ball can be polished or coated, such as a polytetrafluoroethylene- (PTFE) coating. The ball may have a diameter of between approximately 1 mm and approximately 50 mm, for example approximately 15 mm.
Particular embodiments of the invention include corresponding apparatus that can perform the method.
Particular embodiments of the invention include corresponding systems that can perform the method, possibly across some devices.
Although specific embodiments have been illustrated and described herein, those of ordinary skill in the art will be able It is to be understood that the above description is intended to be illustrative and not restrictive. This application is intended to cover any adaptations or variations of the invention. Combinations of the above specific embodiments, as well as many other specific embodiments, will be apparent to those skilled in the art. The scope of the present invention includes any other specific embodiments and applications in which the above structures and methods can be used. Accordingly, the scope of the invention is defined by the scope of the appended claims and the scope of the claims

100. . . generator

110. . . shell

120. . . Drive unit

122. . . Turbine casing

124. . . turbine

126. . . exhaust pipe

130. . . axis

135. . . Bearing

140. . . Power generation unit

142. . . Static

144. . . Rotor

150. . . Gearbox

180. . . Supporting element

200, 204, 206. . . Rotating element

210. . . Chamber

220. . . Peripheral balance area

230. . . Thixotropic balance substance

240. . . Rotary axis

250. . . Center of gravity (CofG)

260. . . Center hole

270. . . Opening

While the specification has been described with particular reference to the claims of the claims In the formula, the manner in which the specific embodiments of the invention are obtained is illustrated. It is understood that the drawings depict only typical embodiments of the invention, and are not to The details describe and explain specific embodiments in which:
Figure 1 shows a schematic view of a generator to which the present invention is applicable;
Figure 2 is a cross-sectional view showing a cylindrical chamber at a time starting point for a preferred embodiment of the present invention;
Figure 3 is a cross-sectional view showing a cylindrical chamber at a point in time when the thixotropic balance material is dispersed along the peripheral balance region of the chamber, in a preferred embodiment of the present invention;
Figure 4 is a cross-sectional view showing a chamber in a rotary member in accordance with still another embodiment of the present invention;
Figure 5 is a cross-sectional view showing a chamber in a rotary member in accordance with still another embodiment of the present invention;
Figure 6 is a cross-sectional view showing a chamber in another rotating member according to still another embodiment of the present invention;
Figure 7 is a cross-sectional view showing another chamber of the rotary member in accordance with still another embodiment of the present invention;
Figure 8 is a cross-sectional view showing another chamber of the rotary member in accordance with still another embodiment of the present invention;
Figure 9 is a cross-sectional view showing still another chamber of the rotary member according to still another embodiment of the present invention; and Figure 10 is a view showing another of the other rotary members according to still another embodiment of the present invention. A cross-sectional view of the chamber.

200. . . Rotating element

220. . . Peripheral balance area

230. . . Thixotropic balance substance

240. . . Rotary axis

250. . . Center of gravity (CofG)

Claims (14)

A method of reducing vibration in a rotating system of a generator, comprising:
- balancing the rotating system,
It is characterized in that
Providing a rotating element comprising a chamber having a point on a rotational axis of the rotating element, the chamber comprising a peripheral balancing area and partially filled with a quantity of a thixotropic balancing substance. For example, the method described in claim 1 further includes:
Rotating the rotating element about the axis of rotation such that the thixotropic balancing substance liquefies and disperses itself along the peripheral balancing area and reduces an imbalance of the rotating element. The method of claim 1 or 2, wherein:
- the axis of rotation is oriented horizontally; or
- the axis of rotation is oriented vertically. The method of claim 1 or 2, wherein:
The rotating element is an original element of the rotating system, a replacement element of the rotating system or a complementary element of the rotating system;
The rotating element is a hollow shaft or a tubular shaft;
The rotating element is a movable joint axis, such as a cardan shaft; or
- its combination. The method of claim 4, wherein:
- the supplemental element is disc shaped; or
- The supplemental element is ring shaped. The method of claim 1 or 2, wherein:
The rotating element is a shaft;
The rotating element is a rotor of the generator;
The rotating element is a gear;
The rotating element is a bearing; or
- its combination. The method of claim 1 or 2, wherein:
- the chamber is wheel or ring, or cylindrical;
The chamber has a cross section of a rectangle, a square, a semicircle, a bell or a circle;
The chamber has between 0.005 m and 2 m, or between 0.01 m and 1 m, or between 0.02 m and 0.5 m, or between 0.05 m and 0.2 m, or 0.1 m One diameter
The chamber has a length between 0.01 m and 1 m, or between 0.02 m and 0.5 m, or between 0.05 m and 0.2 m, or 0.1 m; or
- its combination. The method of claim 1 or 2, wherein:
The stated amount of the thixotropic balance substance is between 0.001 kg and 1000 kg, or between 0.002 kg and 500 kg, or between 0.005 kg and 200 kg, or between 0.01 kg and 100 kg, Or between 0.02 kg and 50 kg, or between 0.05 kg and 20 kg, or between 0.1 kg and 10 kg, or between 0.2 kg and 5 kg, or between 0.5 kg and 2 kg, Or 1 kg;
Filling the chamber with the amount of the thixotropic balancing substance to between 1% and 90%, or between 10% and 80%, or between 25% and 75%, or to 50%; or
- its combination. A device for reducing vibration in a rotating system of a generator, characterized in that:
- a rotating element comprising a chamber having a point on a rotational axis of the rotating element, comprising a peripheral balancing area and partially filled with a quantity of a thixotropic balancing substance. The device of claim 9, wherein the generator is one:
- steam generator,
- Gas turbine generators,
- Hydro generator,
- Internal combustion engine, or - its combination. The device of claim 9 or 10, wherein
The stated amount of the thixotropic balance substance is between 0.001 kg and 1000 kg, or between 0.002 kg and 500 kg, or between 0.005 kg and 200 kg, or between 0.01 kg and 100 kg, Or between 0.02 kg and 50 kg, or between 0.05 kg and 20 kg, or between 0.1 kg and 10 kg, or between 0.2 kg and 5 kg, or between 0.5 kg and 2 kg, Or 1 kg;
Filling the chamber with the amount of the thixotropic balancing substance to between 1% and 90%, or between 10% and 80%, or between 25% and 75%, or to 50%; or
- its combination. A rotary system for a generator for reducing vibration in the rotating system, characterized by:
- a rotating element comprising a chamber having a point on a rotational axis of the rotating element, the chamber comprising a peripheral balancing area and partially filled with a quantity of a thixotropic balancing substance. The rotary system of claim 12, wherein
The stated amount of the thixotropic balance substance is between 0.001 kg and 1000 kg, or between 0.002 kg and 500 kg, or between 0.005 kg and 200 kg, or between 0.01 kg and 100 kg, Or between 0.02 kg and 50 kg, or between 0.05 kg and 20 kg, or between 0.1 kg and 10 kg, or between 0.2 kg and 5 kg, or between 0.5 kg and 2 kg, Or 1 kg;
Filling the chamber with the amount of the thixotropic balancing substance to between 1% and 90%, or between 10% and 80%, or between 25% and 75%, or to 50%; or
- its combination. The rotary system of claim 9, wherein the generator is one:
- steam generator,
- Gas turbine generators,
- Hydro generator,
- Internal combustion engine, or - its combination.