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» Home » Motori oleodinamici

 
Motori oleodinamici
 
D&D Ricambi Srl: the leader on supply of hydraulic components and systems
hydraulic components for construction, earthmoving, agricultural and industrial machinery
 
 
  Series BD:

Technical Characteristics:
The BD series (available sizes from 1 to 6) is characterized by the sliding bearing which ha san extremely low coefficient of fiction and as a consequence gives very high starting torque efficiency, and continues to achieve higher than average mechanical efficiencies both in high and low displacement modes. The motors are capable of working at low speeds with a high degree of speed stability.
The minimum stable speed depends on the displacement of the motor. Output torque remains very constant and does not fall away at very low speeds or under stall or start conditions. The change of the motor displacement in the BD series is achieved by changing the stroke of the crankshaft: min. 20 bar, max. 30 bar. The change, from high to low displacement and viceversa, may take place dynamically if the hydraulic circuit is capable to avoid cavitation and back pressure. Ratio between max and min displacement is available on all models as follows: 1:2, 1:3 and 1:4.

Used for:
The use of double displacement motors is suggested when two different working conditions are clearly identified: power supplied in torque and power supplied in speed.

Suggested Applications:
Capstans, Winches, Mobile (Wheels with gearbox or on the differential), Mobile (to motorize both the machine axles) milling machines (supporting the output shaft).
 

 
 
 
 
  Series BDD:

Technical Characteristics:
Based on BD Series (available sizes 1 & 2), they are double displacement motors with double output shaft.

Used for:
If you need to transmit power to two shafts simultaneously, and to make the most of the power in different configurations of torque and speed.

Suggested Applications:
Axle transmission on 4WD vehicles.
 

 
 
 
 
  Series BF:

Technical Characteristics:
Based on BD series technology, BF fixed displacement motors are characterized by crankshaft and reinforced bearings that allow a high radial load capacity. They are furthermore capable to operate with back pressure up to 50 bar.

Used for:
Radial loads on the shaft, pinion-gear rotation, trasmissions with chains.

Suggested Applications:
Crushers, drilling heads

 
 
 
 
  Series BFDH:

Technical Characteristics:
BFDH Motors, based on BF series, have a crankshaft with through hole for special set up with flushing circuit or passing through rods.

Used for:
If going through the motor with rods is required.

Suggested Applications:
Drilling machines, trasmissions with chain, injection machines with flushing circuit
 

 
 
 
 
  Series BV:

Technical Characteristics:
BV Series (available sizes from 1 to 6 – BV1 and BV2 are also available as CP version) is characterized by the variation of displacement which is achieved by changing the motor crankshaft eccentricity through an integrated electrohydraulically powerled shifting system, which allows displacement variation in different steps. For different types of power, please contact SAI Technical Department.
BV motors are supplied complete of power kit to achieve the displacement variation.

Used for:
If the max torque continuity and rotation power are required. The motor is suitable for heavy applications with heavy shock.

Suggested Applications:
Winches, drilling machines (auger and small drilling machines).
 

 
 
 
 
  Series GD:

Technical Characteristics:
The GD series presents a type of crankshaft design radial piston hydraulic motor based on the nine cylinder design. These motors use many standard components, parts of constant displacement motors (GM series) which ensure better performance and reliability. The nine cylinder design guarantees a very smooth output torque, the shaft’s eccentricity is based on a simple mechanism. The dual displacement is reached by the variation of the eccentricity of the cam of the shaft. The torque power system is based on a low pressure hydraulic device, which activates a power of the valve mechanism which allows to choose between minimum or maximum displacement whose ratio reaches 1:4. The dual displacement system allows the motor to reduce the displacement to 10% of the maximum, therefore increasing the speed ten times. SAI has just launched the GD4A which is equipped with reinforced bearings which guarantee a longer life of the motor.

Used for:
When a motor with two positions of high sturdiness and reliability is necessary. The nine cylinders allow a maximum rotation continuity.

Suggested Applications:
Drilling machines, rotation heads, winches, crushers.

 
 
 
 
  Series GF:

Technical Characteristics:
The GF series is featured by a fixed displacement crankshaft design radial piston hydraulic motor with nine cylinders. These motors use many standard components, parts of constant displacement motors (GM series) which ensure better performance and reliability. The nine cylinder design guarantees a very smooth output torque.

Used for:
When a of high sturdiness and reliability is necessary. The nine cylinders allow a maximum rotation continuity.

Suggested Applications:
Drilling machines, rotation heads, winches, crushers.
 

 
 
 
 
  Series GM:

Technical Characteristics:
GM series motors are a result of the many years’ of experience gained with the preceding M, L and P series motors, and incorporate a number of design variations with respect to these series intended to increase the strength of the motor casings and the load capacity of the internal dynamic components. The result is a series of motors with high continuous power ratings, both because of the reduced internal specific loads and because of the high mechanical and volumetric efficiency that contribute in reducing the amount of heat produced and therefore also the negative effects associated with it. The series presents moreover an excellent contamination and cavitation resistance.

Used for:
If high starting torque and rotation power are required.

Suggested Applications:
Winches, rotations, calenders, scrolls, auger, wheels (with gearbox), etc.
 

 
 
 
 
  Series GMD and GSD:

Technical Characteristics:
Fixed displacement motors with two output shafts (GMD low speeds, GSD high speeds). Their speed and flow capacity allows to offer an operation range almost equivalent to standard motors GM1/GM2 & GS1/GS2. This type of motors is particularly suitable to be used as tandem.

Used for:
To allow the power simultaneously on two shafts. To mount two or more motors together with rotational synchronization.

Suggested Applications:
Flow dividers, mobile (to motorize both axles of the machine), winches, milling machines (which support the exit shaft).
 

 
 
 
 
  Series GS:

Technical Characteristics:
GS & S Series conjugate GM/L series benefits with the possibility to reach high rotation speed; in fact they have maximum speeds which are 2-3 times higher than those normally expected in radial piston motors, the ratio between max. speed and min. speed is higher than any other type of equivalent hydraulic motor, giving great flexibility of application. The rugged design of the motors and their high operating efficiency enable high continuous powers to be transmitted. The motor makes the most of speed with disc cage on crankshaft central roller bearing. This particular kind of cage offers two remarkable advantages, compared to most of the cages available on the market:
1) minimize heat generation, due to the reduced friction area.
2) Maximize heat dissipation, as surfaces of the rolling parts are easier to flush.
Other features of the series are:
Forced lubrification of all load-bearing surfaces, low sliding speeds of load-bearing surfaces, high dynamic stability of the pistons, mechanical non-elastic piston guidance design, increased cylinder-wall thickness and stronger cylinder trunnions for stiffer, higher strength cylinders.

Used for:
If the ratio between max. and min. speed is very high.

Suggested Applications:
Mobile (on differential), milling machines, assembly on gearboxes.

 
 
 
 
  Series L:

Technical Characteristics:
“Traditional” motors with features similar to GM series. They assure maximum mechanical and volumetric performance, high contamination and cavitation resistance.

Used for:
If high starting torque and rotation power is needed.

Suggested Applications:
Winches, injection plastic machines , calenders
 

 
 
 
 
  Series P:

P series motors are similar to GM ones for technical characteristics. Configurations with aluminium case are available, highly suitable for low weight applications. P Series is also characterized by excellent contamination and cavitation resistance.
 

 
 
 
 
  Series S:

Technical Characteristics:
Motors that conjugate L series benefits with the possibility to reach high rotation speed.

Used for:
If the ratio between max. and min. speed is very high. Per applicazioni con elevate potenze specifiche, applicazioni heavy duty.

Suggested Applications:
Dredges, choppers, winches
 

 
 
 
 
  Series SF:

Technical Characteristics:
The SF series presents a new concept type of crankshaft design radial piston hydraulic motor, high quality, high performance. the following motor is characterized by seven fixed displacement cylinders. Very compact and extremely reliable, this motor can work at high speeds and high power with low torque oscillations. Thanks to its very small total dimensions it is specially suitable for solutions like wheels in any kind of application, by itself or with a gearbox.

Used for:
When torque continuity solutions and important rotation speeds are required.

Suggested Applications:
Mobile (on differential), milling machines.
 

 
 
 
 
  Series T:

Technical Characteristics:
The T motor series is characterized by seven radial pistons and increased capacity bearings which allow to obtain a continuous torque which allows a better transmission, pressure and power stability. The motor body is composed by three parts to guarantee a better modularity and lightness. The series is available in the versions with variable displacement TV (available in sizes from 1.5 to 3.5), based on the consolidated experience of the BV motors which can be available with minimum displacement equals to zero, in the dual displacement TD (available in sizes from 1.5 to 3.5) and in the versions of fixed displacement TF (available in sizes from 1.5 to 3.5).

Used for:
For demanding specific power, high pressures, heavy duty applications. The seven cylinders maximize the starting torque and the power of the application.

Suggested Applications:
TF: crushers, winches, milling machines
TD: rotation heads, mobile on differential, winches
TV: rotation heads, mobile on wheels, winches
 

 
 
 
 
  Series XM:

Technical Characteristics:
XM series motors are a result of the many years’ of experience gained with the preceding M, L and P series motors, and incorporate a number of design variations with respect to these series intended to increase the strength of the motor casings and the load capacity of the internal dynamic components. The result is a series of motors with high continuous power ratings, both because of the reduced internal specific loads and because of the high mechanical and volumetric efficiency that contribute in reducing the amount of heat produced and therefore also the negative effects associated with it. The series presents moreover an excellent contamination and cavitation resistance. Unlike the GM series, the motors from the XM series have a different flange which allowes for a 25% increase in displacement compared to the GM series motors.

Used for:
If high starting torque and rotation power are required.

Suggested Applications:
Winches, rotations, calenders, auger, wheels (with gearbox), etc.
 

 
 
 
 
 
   
         
 
       
         

 

 Aluminium body hydraulic gear pumps and motors::
  POLARIS [PL]
  WHISPER [WS]
 
 Cast iron body hydraulic gear pumps and motors:
  POLARIS [PH]
  KAPPA [K]
  FORMULA [FP]
  MAGNUM [HD]
 
 Fixed displacement axial piston pumps and motors::
  STRADA [BAP]
  PLATA [LF]
 
 Variable displacement axial piston pumps::
  PLATA [LVP]
  MVP
  PLATA [DVP-SVP]
 
 Hydraulic hand pumps:
  UP EASY [EP]
 
 Sai Hydraulic engines:
  Sai Hydraulic engines
 
 Examples of targeted projects:
  Hedge and grasscutter mowers
  Fan drives
  Special versions
 
 Applications:
  Building and construction
  Truck market
  Agriculture
 

 

 

 

 
 
 

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Thanks to the know-how and partnerships with global leaders suppliers of hydraulic components, our organization is able to offer customers the best solutions.

Our technical department is available to suggest the best solutions for every need.
Besides standard products supply, D&D Ricambi Srl provides custom solutions for small quantitatives.
 
SP 231 Km 80,176 - 70026 Modugno (Ba)
Fax +39 080.5352723  e-mail:info@dedricambi.it

 

 

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