Oersicht fan floeibere keppeling
In floeistofkoppeling befettet neist de hydraulyske floeistof trije komponinten:
De húsfesting, ek wol de shell neamd (dy't in oaljebeperkte seal moat hawwe om 'e reisassen), leveret de floeistof en turbines.
Twa turbines (leafhawwer lykas komponinten):
Ien ferbûn mei de ynsjochas; bekend as de pomp as driuwfear, primêre tsjil ynput turbine
The other is linked to the output shaft, known as the turbine, result turbine, secondary steering wheel, or runner
The driving turbine referred to as the ‘pump’, (or driving torus) can be rotated by the prime mover, which is normally an interior combustion engine or electric motor. The impellor’s motion imparts both outward linear and rotational movement to the fluid.
The hydraulic fluid is normally directed by the ‘pump’ whose shape forces the stream in the direction of the ‘output turbine’ (or driven torus). Here, any difference in the angular velocities of the ‘input stage’ and ‘output stage’ result in a net power on the ‘output turbine’ leading to a torque; therefore causing it to rotate in the same path as the pump.
The movement of the fluid is effectively toroidal – exploring in one direction on paths that can be visualized as being on the top of a torus:
When there is a notable difference between input and result in angular velocities the movement has an element that can be circular (i.e. round the rings formed by sections of the torus)
As de ynfier- en útfierfazen ferlykbere hoeksnelheden hawwe, is d'r gjin netto sintripetale druk - en de beweging fan 'e floeistof is sirkulêr en koaksiaal mei de rotaasje-as (dus rûn de rânen fan in torus), is d'r gjin sirkulaasje fan floeistof fan de iene turbine nei de oare.
A significant characteristic of fluid coupling is its stall quickness. The stall acceleration is defined as the highest speed at which the pump can turn when the output turbine can be locked and optimum input power is applied. Under stall circumstances all the engine’s power would be dissipated in the fluid coupling as heat, probably resulting in damage.
In wiziging oan 'e maklike floeistofkeppeling is de stapkeppeling dy't eartiids waard produsearre as de "STC-keppeling" troch de Fluidrive Engineering Business.
The STC coupling contains a reservoir to which some, but not all, of the oil, gravitates when the result shaft is definitely stalled. This decreases the “drag” on the input shaft, leading to reduced fuel intake when idling and a decrease in the vehicle’s inclination to “creep”.
As de útgongsas begjint te draaien, wurdt de essensjele oalje troch it sintrifugaal oandriuwen fan it reservoir jiskefet, en komt werom nei it haadlichem fan 'e koppeling, sadat normale oerdracht fan krêft wurdt wersteld.
In floeibere keppeling kin gjin resultaatmoment ûntwikkelje as de hoeksnelheden fan it ynsjoch en it resultaat gelyk binne. Hjirtroch kin in floeiende koppeling gjin 100 prosint prestaasjes foar enerzjytransmissie berikke. Fanwegen glêdens dy't foarkomme kin yn elke floeibere koppeling ûnder lading, sil wat krêft altyd falle yn floeibere wriuwing en turbulinsje, en ferdwûn as waarmte. Lykas oare floeibere dynamyske produkten sil har effisjinsje stadichoan tanimme mei tanimmende skaal, lykas metten troch de Reynolds-hoemannichte.
As a fluid coupling operates kinetically, low viscosity liquids are preferred. Generally speaking, multi-grade motor natural oils or automatic transmission liquids are used. Increasing density of the fluid escalates the quantity of torque that can be transmitted at a given input speed. Nevertheless, hydraulic fluids, very much like other fluids, are at the mercy of adjustments in viscosity with temp change. This qualified prospects to a switch in transmission overall performance therefore where undesired performance/efficiency change has to be held to a minimum, a motor essential oil or automatic transmission fluid, with a higher viscosity index ought to be used.
Fluidkoppelingen kinne ek hydrodynamyske remmen wurde, rotearjende enerzjy ferdwine as waarmte troch wriuwingskrachten (sawol taaie as floeistof / kontener). Wannear't in floeibere koppeling kin wurde brûkt foar remjen, wurdt it ek wol in retarder neamd.
What Is Fluid Coupling?
A fluid coupling is a mechanical device for connecting rotary equipment. It is comprised of metal components that transfer fluid to move the machinery. Fluid couplings are commonly used in automobile transmissions, railway, marine, and aerospace industries. In the automotive industry, fluid couplings replace mechanical clutches and are used for variable-speed operation without a shock loading system. In the oil and gas industry, water and waste treatment, construction, and transportation are just some of the industries that utilize fluid couplings.
The two major fluid coupling functions are torque transmitting and power transmission. Fluid couplings work well with applications where torque and speed are stable. Hydrodynamic couplings are characterized by torque transmitting capacity of rN2D5, where r is the mass density of fluid (rkg/m3), N is the speed of the impeller, and D is the diameter of the shaft. To understand the importance of fluid couplings, consider the following equations.
Fixed charge type fluid couplings: This kind of coupling is filled with hydraulic oil at all times. Variable charge type fluid couplings: These types are used when the starting resistance of a machine is higher than normal. These types are designed to minimize torque limiter and torsional vibration. While the fixed charge type fluid coupling is designed to reduce starting resistance, it also works to protect the electric motor by reducing torque.
Oil charge-discharge type: This type of fluid coupling is designed to operate with hydraulic oil. In this case, an oil charge-discharge switching valve (111) is connected to the outlet of the oil cooler 107. Oil is then charged into the circuit via a replenishment pipe and discharged back to the oil tank 105 at a preset rate. The oil in the circuit is constantly replenished and discharged from the system, and the pump is governed by an actuator 108.
Fluid couplings designed by Turbo Research, Inc. utilize two high-capacity bearings on each output shaft. These couplings can be engaged or disengaged at any engine speed. These couplings can survive higher temperatures than standard ones due to cast aluminum components with thin vanes. They are also easy to install and maintain, which means they are ideal for both power and torque applications. The following are the two major functions of a fluid coupling:
If you’re unfamiliar with the concept of fluid coupling, it’s a type of drive system where the shaft of a machine is connected to a reservoir of fluid. This fluid acts as a coolant for the gearbox, reducing the amount of friction that’s created between the gearbox and the input shaft. While fluid couplings can achieve nearly 100 percent efficiency, they don’t always operate at their optimum level. This means they will occasionally slip under load and heat up. Fluid couplings work best when they are filled with an appropriate amount of fluid.
The operating fluid of a fluid coupling plays an important role in determining the performance and torque transmission of the machine. Fluid couplings typically use hydraulic oil. These fluids are self-cooling, allowing them to quickly absorb and eliminate the heat generated by the mechanical part. When choosing fluid for a fluid coupling, consider the motor power, torque to transfer, and amount of slip in the coupling. A rule of thumb is to use 80 percent of its capacity.
A fluid coupling consists of a pump impeller and a runner on the input and output shafts. The fluid is contained in an oil-tight reservoir and is accelerated or decelerated by a pump impeller. The fluid is then forced by a runner, resulting in a rotational motion of the output shaft. This means the pump will have to accelerate or decelerate a lower speed than it’s driving.
Fluid coupling works on the same principle as a table fan. The first fan is connected to a power supply. As the second fan runs, the air that comes out of it will not drive the second fan at low speeds. When the first fan’s speed increases, so will the air that hits the second fan’s blades. When this happens, the second fan starts to rotate. This is because the second fan needs the same velocity to turn as the first.
Fluid couplings are used in many industrial applications involving rotational power, especially in machine drives that involve high-inertia begins or continuous cyclic loading.
Fluid couplings are found in some Diesel locomotives as part of the power transmitting system. Self-Changing Gears made semi-automated transmissions for British Rail and Voith manufactured turbo-transmissions for railcars and diesel multiple systems which contain several combinations of fluid couplings and torque converters.
Fluidkoppelingen waarden brûkt yn in ferskaat oan iere semi-automatyske transmissies en automatyske transmissies. Om't it ferline troch 1940's, de hydrodynamyske koppelomformer soarget foar ferfangen fan 'e floeibere koppeling yn tapassingen foar motorfytsen.
Yn applikaasjes foar motorauto's is de pomp typysk ferbûn mei it flywheel fan 'e motor-yn wierheid, de omwâling fan' e koppeling kin passend wêze foar it fleanwiel, en wurdt dêrom oerskeakele troch de krukas fan 'e motor. De turbine is keppele oan de ynsjochas fan de oerdracht. Wylst de transmitting is yn gear, as motorsnelheid ferheget koppel wurdt normaal oerdroegen fan 'e motor nei de ynsjochas troch de beweging fan' e floeistof, dy't de auto oandriuwt. Wat dit oanbelanget liket it gedrach fan 'e floeiende koppeling sterk op dat fan in meganyske koppeling dy't in hantlieding stjoert.
Fluide flywheels, as ûnderskiedend fan koppelombouwers, binne it meast bekend foar har gebrûk yn Daimler-auto's yn 'e mande mei in Wilson-pre-selektor-oandriuwbox. Daimler benutte dizze yn har seleksje fan lúkse auto's, oant hy mei de 1958 Majestic oerstapte op automatyske fersnellingsbakken. Daimler en Alvis wiene beide ek bekend om syn of har militêre weinen en pânsere weinen, wêrfan in pear ek de kombinaasje brûkten fan in pre-selektor-fersnellingsbak en floeibere flywheel.
It protte promininte gebrûk fan floeistofkeppelings yn loftfeartapplikaasjes wie yn 'e DB 601, DB 603 en DB 605 motors wêr't it waard brûkt as in barometrysk regele hydraulyske koppeling foar de sintrifugale kompressor en de Wright turbo-stof wjergadermotor, wêrby't trije turbines foar krêftwinning. helle sawat 20 prosint fan 'e enerzjy of sawat 500 pk (370 kW) út' e útlaatgassen fan 'e motor en konvertearre dan, mei help fan trije floeistofkoppelingen en gearing, de turbine-rotaasje mei leech koppel mei hege fersnelling nei leech-snelheid, heech koppelresultaat om te wurkjen in auto de propeller.
Fluid couplings divide input and output sides, which helps reduce the load on the motor and pump. The couplings can also transfer the holding force needed during starting. Fluid couplings can be installed on multiple drive applications for starting. They share the load according to the torque versus speed curves of the drive motors and couplings. The fluid coupling limits the torque of the motor during conveyor jams to the slip level of the coupling, which is usually 125-175%. The fluid coupling control system includes a base case of permissive belts and sensors that detect fluid dump.
Fluid couplings are made up of a housing, an impeller on the input shaft, and a runner on the output shaft. Oil is added to the fluid through a filling plug on the housing. The impeller and runner act like pumps and turbines to convert the fluid’s energy into mechanical energy. The different couplings have different stall speeds, which are the highest speeds that the fluid can reach when the runner is locked.
Many belt conveyor systems depend on multi-motor drives. Fluid couplings minimize the torque variability between the motors and the drive train, while providing more secure power grid. Since the torque varies in frequency, fluid couplings don’t require excessively large drive-system modules that would overheat under break-away conditions. They also boost dynamic characteristics of the drive. The fluid coupling secures all components of the mechanism. It also prevents individual motor overload.
Application in railways
The primary advantage of fluid coupling is that it enables the maximum torque of the drive train to be restricted to a certain range without mechanical contact. In addition, this type of coupling is more durable and reduces the risk of breakaway torque. Several benefits of fluid coupling in railways include: energy saving, stepless speed regulation, virtually frictionless clutching, and control starting from zero motor load. Fluid coupling also offers increased dynamic characteristics and long-term reliability.
The fluid coupling is a unique system that divides the input and output sides by two separate vaned members called the “runner” and “impeller.” The fluid in these two vaned parts is directed into the impeller via a pump, and this enables rotation of the fluid to move the output shaft. The fluid’s rotation transfer improves torque transfer and decreases the risk of overheating the seals.
Fluid couplings use transmission fluid to transfer power from the engine to the train. They consist of two sets of facing rotating vanes in a sealed housing. One set of vanes acts as a pump, while the other is a turbine. Fluid couplings also feature a pre-filled cooling module that makes maintenance easier. Lastly, CEJN’s quick couplings can be used in many applications.
The advanced control system allows engineers to optimize the performance of the hydraulic system and minimize risks. The software allows for easy coupling selection and lower operating risks. The TPXL is available in various capacities, ranging from 250 to 600 kW. If you’re planning a railway project, fluid coupling is a great way to increase your efficiency. With Hydrodynamic torque transmission, your belts are protected against damage from high load and friction.
Whether it’s hydraulic couplings, pneumatic couplings, or hydraulic hoses, the correct fluid fill is critical for the proper operation of a fluid coupling. A coupling with inadequate fluid volume will not transmit full torque and will most likely overheat and damage seals. Variable fill fluid couplings are the perfect solution for this problem. Hundreds of manufacturers are available, and Chinese manufacturers provide quality products and competitive prices.
The advantages of fluid couplings are wide-ranging. In addition to smooth acceleration, they also provide load limiting, shock loads, and peak load damping. Fluid couplings can be sized and rated according to their torque capacity. And they are similar in their characteristics in both directions of rotation. This makes them ideal for rotating machinery. And if you’re interested in reducing your energy costs, consider fluid couplings.
The main benefits of fluid couplings include soft start, overload protection, and low-maintenance costs. They also reduce the size of the prime mover by allowing for no-load start-up. These advantages mean that fewer motors need to be purchased. Fluid couplings also save on set-up and operating costs. You’ll be able to use smaller motors and reduce your energy bills. This type of coupling will make you money, and will last for many years.
Hydrodynamic fluid couplings protect belts, gear reducers, and motors by transferring power to multiple parts. They maximize power transmission and minimize wear and tear, and they allow you to control the speed, torque, and operating speed. In addition to protecting the driveline, they also slip when the load is too much for it. So, if you’re looking to reduce your energy costs, consider hydrodynamic fluid couplings.
Do kinst keapje floeibere keppeling fan ús ek.