The vr 3250 is a highperformance, energyefficient stepup gear retarder with its own oil supply. The british prototype advanced passenger train apt used hydraulic retarders to allow the highspeed train to stop in the same distance as standard lower speed trains, as a pure friction. Retarders serve to slow vehicles, or maintain a steady. Voith s retarder offers a wide range of models depending on the reading books is the best way of selfdevelopment and learning many interesting things. Press release hydraulic retarders market by top key players frenelsa, voith, sumitomo electric, air fren. Enhanced safety, efficiency and sustainability voith retarders. It is integrated into the transmission at the output end and shares its oil supply with the transmission.
Voith diwa economy and comfort made to measure on the basis of individual criteria such as wear, weight distribution, noise levels, passenger compartment design, etc. Voith fluid couplings for diesel and gas engine drives voith turbo. Voith electrohydraulic thruster lyttelton mining supplies. Engine brake and voith retarder complement each other ideally, because their braking effect adds up. Voiths retarder offers a wide range of models depending on the use and assembly, since the latest can be connected to the box or connected to the axle of the vehicle transmission free assembly. Volvo bus service and maintenance manual, brake system. Voith pumps are also used in many manufactured systems. With voith retarders for trucks, up to 90 percent of all braking actions can be performed. Road vehicles endurance braking systems of motor vehicles. The truck wheels turn the rotor through the transmission. Shanghai 265 hua jin road 201108 shanghai, china tel. Pdf effects of blade lean angle on a hydraulic retarder.
This service is only open to current voith diwa, marine, and rail customers in north america, voith service providers, original equipment manufacturers who use voith equipment in their products, voith pump distributors, and voith employees. Voith pumps fluid dynamics offers a broad line of voith pumps, specially characterized by energysaving, applicationoptimized and. The objective of this study is to clarify the effects of blade lean angle on. We are leading specialists in the repair of voith turbo internal gear pumps the oil volume enclosed in the gap between teeth is conveyed from the intake to the discharge side of the pump by the turning of the gear, displaced to the contact point of the wheel and forced into the pressure connection. As a rule, the pump draws the pressurised fluid from a storage tank and conveys it to the pump outlet. Voith turbo hydraulic pumps, multiple pumps, iph, ipv, ipc. These electrohydraulic thrusters combine all the basic parts of a hydraulic system electric motor, pump, piston etc, assembled into a single, sealed enclosure complete with.
Effects of blade lean angle on a hydraulic retarder ming. In 1953, voith produced europes fastest service for complex rolls. Zf calls their hydraulic retarders as intarders but principally they are same as hydraulic retarders. The hydraulic retarder, either the allison or the voith are very reactive, work well with abs and have tremendous energy absorption power. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from running away by accelerating down. There are several different types which can use standard transmission fluid, a separate oil supply, water, or a mix of. We are leading specialists in the repair of voith turbo internal gear pumps the oil volume enclosed in the gap between teeth is conveyed from the intake to the discharge side of the pump by the turning of the gear, displaced to the contact point of the wheel and forced into the pressure connectionour stateoftheart dynamometer allows us the check up. This makes it harder for the rotor to turn and correspondingly makes it. Pdf the rotor and stator blade lean angle of a hydraulic retarder is one of its main. The voith electrohydraulic thruster is selfcontained and designed to exert a smooth, straight, upward thrust. The voith electro hydraulic thruster is selfcontained and designed to exert a smooth, straight, upward thrust. Magnetic retarders are similar to the electric retarder discussed below. This paper introduces the construction of the hydraulic retarder. We tested the voith retarder on a test track of almost 5 km, including slopes up to 7%, and over a longhaul distance of more than 3,100 km under real conditions.
Sophisticated technology, robust design and costefficient operation have convinced thousands of customers to trust voith. This list of voith transmissions details those automotive industry commercial vehicle. The rotor throws the oil in the rotor cavity against the fixed stator vanes, which resist the oil flow. Operating manual 5 the consolidated group had revenues of 5.
Retarder voith is the hydraulic brake system of the gear box mechanic or manual designed by voith. Voith turbo hydraulic pumps, multiple pumps, iph, ipv, ipc, ipn. Jake brake and exhaust brake and retarder roughly explained. Retarder, breaking system, heavy vehicles introduction retarders are not restricted to road motor vehicles, but may also be usedin railway systems. They are even mandated in certain tenders called of by state transport undertakings like ksrtc. Voith and zf are two major manufacturers of hydraulic retarders. Currently this only includes software updates for the diwagnosis program, online service manuals for diwa transmissions, voith pump distributor information, manuals for certain voith marine products, and diwa and voith rail bulletin and service information that you can download or read online. At the same time, transport capabilities increase due to higher average speeds. Allisons hydraulic retarder is basically a vaned flywheel in the transmission housing. Voiths secondary water retarder was awarded the european transportation prize for sustainability and the ecw innovation label award for its innovative, energysaving and nonpolluting approach. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from running away by accelerating down the hill.
Voith braking systems for trucks discover the retarder 115 ct en. Transmissao voith gearbox retarder system go170 go210 with r115e 60 pag. The zfintarder is a hydrodynamically operating hydraulic retarder. According to the present invention a hydraulic retarder 44 is connected to a driven shaft 46 and liuid is selectively received through it from the converter 11 through the medium of a control valve 48 which is movable by means of a suitable pedal not shown to the lill position. As the name suggests, they work the principle of hydraulics. In this technique retarder device is used to augment or. The retarder is coordinated with the engines exhaust brake, which results in high overall braking power. Such velocity reduction could reduce the potential risk caused by brake failure caused by the service brake working for a long time and the temperature of the brake shoe becomes extremely high. Better braking with voith retarders for commercial vehicles. Our company telma, for over 70 years the world leader in frictionless electromagnetic induction braking systems since 1946, telma has been the world leader in frictionless braking systems based on the physical principle of electromagnetic induction. Transmissao voith gearbox retarder system go170 go210 with.
There are several different types which can use standard transmission fluid, a separate oil supply, water, or a mix of oil and magnetic retardation. In a hydraulic transmission, a hydrodynamic coupling, a fluid circuit for supplying fluid under pressure to said coupling, a heat exchanger in said fluid circuit for cooling the fluid, a hydraulic retarder having a rotor and a stator, said rotor being adapted to be connected to a rotatable element, and means for selectively providing uid. The transmission directs oil into the retarder housing to absorb the vehicles energy through the drive shaft. It seems the idea is same with the torque converter for at cars, utililizing the high rotation speed deviation between rotator and the impeller to. The voith 115 ct is a stepup gear retarder with a high braking torque. Brake overheating, wear, and complete failure have always been a problem with fire apparatus. Whether its maintenance or repairs, troubleshooting, or the functional testing of individual components. Retarder mechanical engineering wikimili, the best. With voith retarders, up to 90 percent of all braking actions can be performed without wear. Voith transmission service manual agriculture international hydrostatic transmissions service manual, case david brown 1190 1290 90 synchromesh transmission service manual gtc6a 2, clark 8000 series. Retarders protect the service brakes, thus reducing expenditures on spare parts and maintenance. Evaluation of performance characteristics and inservice costs, being performed by the highway safety research institute hsri of the university of michigan on behalf of the national highway traffic safety administra. D506 2stage differential torque converter with either a single, or low and high speed gear ranges and optional hydraulic retarder.
Pittius 20040203 iso 2226swg 6 retarders test procedures for type approval wd 12161 page 1 presentation to grrf, 55th session, geneva febr. Inside the intarder, the blade wheels of the rotor and stator are facing each other. The system is used in numerous mercedesbenz and setra series as well as in buses from van hool, vdl, man and neoplan. On the track with slopes, the average speed with the retarder increased by 56%. Hydraulic retarders market by top key players frenelsa. Syne then, improvements tae turbotransmissions hae paralleled seemilar advances in diesel motors an the day this combination plays a leadin role warldwide, seicont anly tae the uise o electrical drives. A wide variety of hydraulic retarder options are available to you, there are 835 suppliers who. Like the electrical retarder, the hydraulic retarder can be tested driving on the road or on a vehicle dynamometer.
The objective of this study is to clarify the effects of blade lean angle on hydraulic retarder performance. Voith s retarder offers a wide range of models depending on the reading books is the best way of selfdevelopment and. Sophisticated technol ogy, robust design and costefficient operation have convinced thou sands of customers to trust voith. Facts and advantages in favor of the voith retarder. A transmission which includes a hydrodynamic torque converter provided in the input side of a stepped gear transmission shiftable under load. The stator of a retarder is connected directly to a housing cover and a counterpressure valve, a lubrication pressure valve and a further valve for controlling the flow of the hydrodynamic unit and of the retarder are provided on this housing cover as well. The retarder by terry eckert and al conkle thanks to the nfpa 1901 standard we new have to install auxiliary braking systems on apparatus that weigh over 36,000 lbs. The first turbotransmission wis developed in 1932 bi voith in heidenheim, germany.
We provide the following spare parts for voith turbo hydraulic pump hydraulic pumps convert mechanical energy into hydraulic energy or vice versa. Constantfill voith fluid couplings are used with electric motors in a wide range of applications, especially when highest powers, economy and reliability are required. Nov 01, 2015 a retarder is a device used to augment or replace some of the functions of primary frictionbased braking systems, usually on heavy vehicles. The govr 115 e transmission retarder system was developed together with daimler ag especially for buses. Hydraulic retarders are auxiliary braking devices that reduce the velocity of a vehicle, particularly when a vehicle is driven downhill. Voith turbo distributor pumps, motors, valves, and servo. As a result, you have optimum braking power, both at low. Like all voith retarders, the aquatarder too works to the. Retarder mechanical engineering wikipedia republished. The retarder is coordinated with the engines exhaust brake, which results in. Hydraulic retarders use the viscous drag forces between dynamic and static vanes in a fluidfilled chamber to achieve retardation. Primary principle being the pascals law pressure applied to any part of a confined fluid transmits to every other part with no loss. Volvo bus service and maintenance manual, brake system, page 34. The voith retarder 115 e is a highperformance stepup gear retarder with its own transmissionindependent oil supply.
Retth is a compact, gearboxmounted, hydraulic retarder that effectively supplements the vehicles ordinary brake system. As an expert for difficult tasks in power transmission voith turbo meets the steadily increasing requirements in practice and convinces through innovative performance. Manuals for voith retarder actros to download voith retarder actros manuals for download and printout as pdf or for viewing them online. This list of voith transmissions details those automotive industry commercial vehicle transmissions made by german voith ag. Through this paper an initiative is taken to put focus on a special technique of retarder mechanism which is used in automobile industries. A retarder is a device used to augment or replace some of the functions of primary frictionbased braking systems, usually on heavy vehicles. These electro hydraulic thrusters combine all the basic parts of a hydraulic system electric motor, pump, piston etc, assembled into a single, sealed enclosure complete with the hydraulic oil filled after installation.
Voith pumps fluid dynamics offers a broad line of voith pumps, specially characterized by energysaving, applicationoptimized and reliable designs. May 18, 2019 press release hydraulic retarders market by top key players frenelsa, voith, sumitomo electric, air fren. At the voith retarder workshop in crailsheim, and throughout the world. The retarder has its own transmissionindependent oil supply and is available as a customized solution for various gearbox types. On the track with slopes, the average speed with the retarder.
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