Main Hydraulic Pump Motor and Starter Systems Assignment - 3

Main Hydraulic Pump Motor and Starter Systems - Assignment Example The researcher states that the hydraulic powers systems that are currently used in the submarine systems and devices are not only used in powering the devices but also used in operating other systems within the vessels. The submarines also require the use of electric power especially for propulsion as well as operating auxiliary equipment within the vessel. Other than moving stationary light equipment, electricity is often used in instantaneous stopping some equipment such as electric motors. Motors often have the tendency to drift and/or over-travel thereby becoming difficult to control without electricity. Additionally, electrically driven equipment is often noisy and require intense maintenance; therefore, to overcome these shortcomings, the submarine devices are currently designed and manufactured to use hydraulic powering systems including hydraulic motor pumps. Hydraulic motors are the power units of the marine devices; however, they do not generate their own power, but they of ten convert hydraulic power into mechanical energy that is transmitted to other parts of the vessel. Therefore, pumps are the central power supply for the devices using hydraulic systems. The pumps are used to create pressure within the system. Submarine devices usually have different pumps playing different roles. The Waterbury A-end pump is among the pumps using the submarine devices. A rotating shaft operates the Waterbury A-end pump. The rotating shaft may be operated by hand or motor. There are usually three hands driven and three motor-driven Waterbury A-end pumps play different functions to a submarine. They drive the steering system, bow plan system, and stern plan system. Under normal operations, two parts of the entire three systems are used distinctively in the system as steam and motor transmitting oil units while the hand driven part is usually fitted to a larger hand wheel. The Waterbury A-end speed gear operates on a rotation principle where its multiple pistons are o n reciprocating rotations. The gear consists of three basic elements including the socket ring, cylinder barrels, and tilt box. The socket ring is located in ball sockets and it holds seven or nine pistons that connect different rods. On the other hand, the cylinder barrel corresponds to the seven or nine cylinders whereas the tilted box is an inclined socket ring that corresponds to the cylinder barrel.

Early History and the Struggle for Resources Essay

Early History and the Struggle for Resources - Essay Example This environmental injustice has resulted from the high technological development in the region (Pellow & Park, 2002). This chapter has provided a historical basis to explain how immigrants, people of color, and other labor providing people in the valley have experienced conflicts of environmental justice in the Silicon Valley. Natives have been robbed of their natural resources. They are not entitled to their citizenship right thus denying them political power and exposing them to slavery and exploitation (Pellow & Park, 2002). The chapter challenges the assumption that environmental injustice is a recent phenomenon by highlighting how people of color and immigrants have been fighting for centuries (Pellow & Park, 2002). In 1769, a certain group of people occupied the Silicon Valley and began controlling and degrading its natural resources like water, minerals, and land (Pellow & Park, 2002). These actions exposed immigrants and people of color to environmental risks. The chapter concludes by tracing the Spanish conquest, the devastation of Native American populations and Bay Area Ecosystems to be the origin of environmental injustice (Pellow & Park, 2002). Since their occurrence, natural resources and human labor exploitations have been building on each other. Assignment: Read chapter 2 "The Silicon Valley of Dreams" Subtitle: Environmental Injustice, Immigrant Workers, and the High-Tech Global Economy... Author by David Naguib Pellow and Lisa Sun-Hee Park and provide a one page summary that includes the following: Introduction, Body and