PURPOSE:

     The purpose of this lab is provide an opportunity to study hydraulic pump specifications in order to select an appropriate model
and compare manufacturer's technical specifications on selected parameters. A hydraulic pump will be specified for a mobile hydraulic
log splitter to allow for a better understanding of manufacturer's specifications, performance curves, and technical data.  Bosch Rexroth
Corporation will be the assumed vendor for this laboratory exercise, and a technical bulletin will be provided.

Objectives:  The following objectives will be completed in order to accomplish the overall goal and purpose of this laboratory exercise:

1.      Determine the nominal operation parameters required by the system;

2.      Draw the required hydraulic circuit, label all components and provide notes where appropriate, provide a Bill of Materials (BOM);

3.      Identify the most appropriate type of hydraulic pump to be selected;

4.      Determine a suitable model pump and specifications for the required system.

Procedures:  A pump is to be selected for a portable hydraulic log splitter with the desired operational parameters

                       as follows:

•                Hydraulic cylinder (assumed to be on hand):  4 inch bore, 2 inch rod, 30 inch stroke.
•                Engine horse power must be less than 20 HP
•                Continuous RPM near 2500
•                Continuous system operating pressure near 2000 psi
•                Desired cycle time near 16 seconds

1.      Calculate the target flow rate based on the given parameters.

2.      Determine the target volumetric displacement for the pump.

3.      Use the Bosch Rexroth Pump and Motor Bulletin to select an appropriate type and model pump for the system.
  Verify the selection by identifying the operational parameters of the selected pump including, but not limited
  to the following:

A.      Pump maximum flow rate at 3000 RPM

B.      Pump minimum RPM

C.      Pump flow rate at 2000 psi and 2500 RPM

D.      Volumetric displacement

E.       Pump peak pressure

F.       Horse power requirement to drive the pump

G.      Operational curves for output flow and input horse power for the pump

H.      Model number for the pump

I.        Recommend viscosity

J.        Type of pump seals.

4.       Write a laboratory report using the typical format and include all calculations, pump performance curves,
  and model number in your report.