MOTORS Technical Information

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Contents Chapter 1 General Information ________________________________________________________4 Operating Recommendations______________________________________________________________ 5 Oil type _____________________________________________________________________________________ 5 Fluid viscosity & Filtration _______________________________________________________________________ 5 Installation & Start- Up _________________________________________________________________________ 5 Motor protection ______________________________________________________________________________ 5 Hydraulic Motor...

Chapter 1General Information Topics: • Operating Recommendations • Product testing • Allowable Bearing & Shaft Loading • Speed Sensor • Features / Benefits • Sensor options • Internal Drain • Valve cavity WHITE can accept no responsibility for possible errors in catalogues, brochures, and other printed material. WHITE reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed. All trademarks in this material are the property of the...

Operating Recommendations Oil type Hydraulic oils with anti-wear, anti-foam and demulsifiers are recommended for systems incorporating these motors. Straight oils can be used but may require VI (viscosity index) improvers depending on the operating temperature range of the system. Other water based and environmentally friendly oils may be used, but service life of the motor and other components in the system may be significantly shortened. Before using any type of fluid, consult the fluid requirements for all components in the system for compatibility. Testing under actual operating conditions...

Motor/Brake Precaution Caution! - The motors/brakes are intended to operate as static or parking brakes. System circuitry must be designed to bring the load to a stop before applying the brake. Caution! - Because it is possible for some large displacement motors to overpower the brake, it is critical that the maximum system pressure be limited for these applications. Failure to do so could cause serious injury or death. When choosing a motor/brake for an application, consult the performance chart for the series and displacement chosen for the application to verify that the maximum operating pressure...

Motor circuits There are two common types of circuits used for connecting multiple numbers of motors – series connection and parallel connection. Series connection When motors are connected in series, the outlet of one motor is connected to the inlet of the next motor. This allows the full pump flow to go through each motor and provide maximum speed. Pressure and torque are distributed between the motors based on the load each motor is subjected to. The maximum system pressure must be no greater than the maximum inlet pressure of the first motor. The allowable back pressure rating for a motor...

Product testing Performance testing is the critical measure of a motor's ability to convert flow and pressure into speed and torque. All product testing is conducted using a state of the art test facility. This facility utilizes fully automated test equipment and custom designed software to provide accurate, reliable test data. Test routines are standardized, including test stand calibration and stabilization of fluid temperature and viscosity, to provide consistent data. The example below provides an explanation of the values pertaining to each heading on the performance chart. Displacement...

Allowable Bearing & Shaft Loading This catalog provides curves showing allowable radial loads at points along the longitudinal axis of the motor. They are dimensioned from the mounting flange. Two capacity curves for the shaft and bearings are shown. A vertical line through the centerline of the load drawn to intersect the x-axis intersects the curves at the load capacity of the shaft and of the bearing. In the example below the maximum radial load bearing rating is between the internal roller bearings illustrated with a solid line. The allowable shaft rating is shown with a dotted line. The...

To determine maximum motor speed RPM = Step One: Determine Rolling Resistance Rolling Resistance (RR) is the force necessary to propel a vehicle over a par cular surface. It is recommended that the worst possible surface type to be encountered by the vehicle be factored into the equa on. RR = Where: GVW = gross (loaded) vehicle weight (lb or kg) R = surface fric on (value from Table 1) 1500 Example RR = x 22 lbs = 33 1000 MPH = max. vehicle speed (miles/hr) KPH = max. vehicle speed (kilometers/hr) ri = rolling radius of re (inches) G= gear reduc on ra o (if none, G = 1) rm = rolling radius of...

11 Step Three: Determine Accelera on Force Step Seven: Determine Wheel Slip Accelera on Force (FA) is the force necessary to accelerate from a stop to maximum speed in a desired me. To verify that the vehicle will perform as designed in regard to trac ve effort and accelera on, it is necessary to calculate wheel slip (TS) for the vehicle. In special cases, wheel slip may actually be desirable to prevent hydraulic system overhea ng and component breakage should the vehicle become stalled. Where: t = me to maximum speed (seconds) Step Four: Determine Drawbar Pull Drawbar Pull (DP) is the addi onal...

Induced Side Load In many cases, pulleys or sprockets may be used to transmit the torque produced by the motor. Use of these components will create a torque induced side load on the motor shaft and bearings. It is important that this load be taken into consideration when choosing a motor with sufficient bearing and shaft capacity for the application. Figure 5 Induced side load To determine the side load, the motor torque and pulley or sprocket radius must be known. Side load may be calculated using the formula below. The distance from the pulley/sprocket centerline to the mounting flange of the...