Fixed Displacement Radial Piston Staffa Motor HMB Series
96Pages

Precision Machinery Company Fixed Displacement Radial Piston Staffa Motor

2-2. Volumetric Efficiency Data 12 2-3. Shaft Power Calculations 13 2-5. Shaft Stress Limits 15 2-6. Bearing Life Notes 16 2-7. Circuit and Application Notes 17 - 19 2-8. Motor Operation at Low Temperatures 20 2-10. Crankcase Drain Connections 22

■ General Descriptions The Kawasaki “Staffa” range of high torque low speed fixed displacement radial piston hydraulic motors consists of 13 frame sizes ranging from the HMB010 to HMB500. Capacity ranges from 188 to 8,000 cc/rev. The rugged, well proven design incorporates high efficiency, combined with good breakout torque and smooth running capability. Various features and options are available including, on request, mountings to match competitors' interfaces. The Kawasaki “Staffa” range also includes dual and triple displacement motors. To obtain details of these product ranges please...

Other non standard displacements are possible - check with KPM UK for details.

Ordering Code 1 1-1 Model Coding F11/HM*B 060 / S3 V/ FM3/Tj/ */ P***** Fluid Type See page 39 * Not available for B010 frame size. Main Port Connections See Port Connection options in installation drawings.

1-1 Model Coding+Special Features Suffix Shaft Seal Enhancements

2-1 Performance Data + Rating definitions Continuous rating For continuous duty the motor must be operating within each of the maximum values for speed, pressure and power. Intermittent rating Operation within the intermittent power rating (up to the maximum continuous speed) is permitted on a 15% duty basis, for periods up to 5 minutes maximum. Intermittent max pressure This pressure is allowable on the following basis: a) Up to 50rpm 15% duty for periods up to 5 minutes maximum. b) Over 50 rpm 2% duty for periods up to 30 seconds maximum. Static pressure to DNV rules 405 bar (except...

2-1 Performance Data (cont) Output Torque Curves These torque curves indicate the maximum output torque and power of a fully run-in motor for a range of pressures and speeds when operating with zero outlet pressure on Mineral Oil of 50 cSt (232 SUS) viscosity. High return line pressures will reduce torque for a given pressure differential. - x - x - x - Upper limit of continuous rating envelope. HMB010 200 300 Shaft speed (r/min) 200 300 Shaft speed (r/min) Shaft speed (r/min) 200 300 Shaft speed (r/min)

2-1 Performance Data (cont) Output Torque Curves (cont) HMB060 100 150 200 Shaft speed (r/min) Shaft speed (r/min) Shaft speed (r/min) Shaft speed (r/min)

2-1 Performance Data (cont) Output Torque Curves (cont) HM(HD)B200 Shaft speed (r/min) Shaft speed (r/min) Shaft speed (r/min) Shaft speed (r/min)

2-1 Performance Data (cont) Output Torque Curves (cont) HMHDB400 Shaft speed (r/min) Shaft speed (r/min)

2-2 Volumetric Efficiency Data Fluid Viscosity Qt (total leakage) Creep speed Crankcase leakage AP n The motor volumetric efficiency can be calculated as follows: Volumetric efficiency (%) (speed x disp.) (speed x disp.) + Qt Example: HMB200 motor with displacement of 3.080 l/rev. Speed 60 rpm Total leakage = (Ki + n/K2 ) x AP x Kv x 0.005 l/min Volumetric efficiency

2-3 Shaft Power Calculation Example (see page 4) Firstly, to find the maximum differential pressure ΔP at rated speed: Select the rated shaft power (W) for the motor from the performance data table (page 4). This is presented in kilowatts so must be converted to watts (x1000). Then also take the Actual Average running torque in N.m/bar (To) and the rated shaft speed in rpm (n). W = To . ΔP . 2π . n 60 Or to find maximum ΔP then use: ΔP = HMB270 Example: Rated shaft power, W (W): Average actual running torque, To (Nm/bar): Rated shaft speed, n (rpm): ΔP = 60 x 140,000 2π x 63.79 x 125 ΔP=...

2-4 Functional Symbols HMB010HMB030 (Monobloc) Dual ports

When applying large external radial loads, consideration should also be given to motor bearing lives (see page 16). Example: Determine the maximum radial shaft load of a HMB080 motor: Radial load offset, A = 100 mm Maximum radial load, W = 5,500 (see table)/100 A = Distance from mounting face to load centre (mm) W = Side load (N) [Note} The offset distance A is assumed to be greater than 50 mm. Contact KPM UK if this is not the case.

2-6 Bearing Life Notes Consideration should be given to the required motor bearing life in terms of baring service life. The factors that will determine bearing life include: 1) Duty cycle - time spent on and off load 2) Speed 3) Differential pressure 4) Fluid viscosity 5) External radial shaft load 6) External axial shaft load [NOTE] A heavy duty HM(HD)B motor can be ordered to further improve bearing life. Consult KPM UK if you need a detailed bearing life calculation.

2-7 Circuit and Application Notes +Starting torque The starting torques shown on the graphs on pages 8 to 11 are average and will vary with system parameters. ^ Low Speed Operations Minimum operating speeds are determined by the hydraulic system and load conditions (load inertia, drive elasticity, etc.) Recommended minimum speeds are shown below:

2-7 Circuit and Application Notes (cont) Max. off load: Max. on load: Optimum: Minimum: The flow rate of oil needed for the make-up system can be estimated from the crankcase leakage data (see page 12 for calculation method). Allowances should be made for other system losses and also for “fair wear and tear” during the life of the motor, pump and system components. ^Cooling Flow Operating within the continuous rating does not require any additional cooling. For operating conditions above “continuous”, up to the “intermittent” rating, additional cooling oil may be required. This can be...

2-7 Circuit and Application Notes (cont) ^Mineral oil recommendations The fluid should be a good hydraulic grade, nondetergent Mineral Oil. It should contain anti-oxidant, antifoam and demulsifying additives. It must contain antiwear or EP additives. Automatic transmission fluids and motor oils are not recommended. ^Biodegradable Fluid Recommendations Well-designed environmentally acceptable lubricants (EALs) may be used with Staffa motors. The EAL must be designed for use in hydraulic systems and have a synthetic ester base. Additives should be as listed for mineral oils, above. The...