Advanced

Further Development of a Hydraulic Fan Drive

Lindbäck, Peter (2008)
Product Development
Abstract
This Master thesis was carried out in cooperation with BAE Systems Hägglunds in Örnsköldsvik and its purpose is to improve the efficiency of the hydraulic system for the cooling fan drive in the track driven military vehicle BvS10.

The efficiency of the pump and motors are summarized using data from the subcontractors and the efficiency of the pipe line system is derived using Bernoulli's formula for steady isothermal flow and the percentage opening of the proportional valve. Calculations are done in a number of different cases because of the vehicles supposed ability to operate at a wide scale of different temperatures and at very different types of terrain. These calculations are illustrated by graphs of how much pressure loss there... (More)
This Master thesis was carried out in cooperation with BAE Systems Hägglunds in Örnsköldsvik and its purpose is to improve the efficiency of the hydraulic system for the cooling fan drive in the track driven military vehicle BvS10.

The efficiency of the pump and motors are summarized using data from the subcontractors and the efficiency of the pipe line system is derived using Bernoulli's formula for steady isothermal flow and the percentage opening of the proportional valve. Calculations are done in a number of different cases because of the vehicles supposed ability to operate at a wide scale of different temperatures and at very different types of terrain. These calculations are illustrated by graphs of how much pressure loss there is through the pipe line system.

To verify the results of the calculations a practical experiment was done. Fittings in two different sizes with hoses were connected to a hydraulic system and the pressure before and after were measured. The result of this experiment was that the difference between the practical and the theoretical pressure loss was greater for the smaller hoses and fittings compared to the larger ones. This amplified corresponding spots in the theoretical calculations.

Furthermore a simulation software called SimulationX was used to visualize how the different parts of the efficiency contributes to the total efficiency and to show how much the recommended changes would affect the system. (Less)
Please use this url to cite or link to this publication:
author
Lindbäck, Peter
supervisor
organization
year
type
H2 - Master's Degree (Two Years)
subject
keywords
vacuum technology, hydraulics, Mechanical engineering, SimulationX, Hydro motor, Hydro pump, Hydraulics, Volumetric efficiency, Hydro mechanical efficiency, vibration and acoustic engineering, Maskinteknik, hydraulik, vakuumteknik, vibrationer, akustik
language
Swedish
id
1320231
date added to LUP
2008-05-13
date last changed
2012-01-11 16:22:32
@misc{1320231,
  abstract     = {This Master thesis was carried out in cooperation with BAE Systems Hägglunds in Örnsköldsvik and its purpose is to improve the efficiency of the hydraulic system for the cooling fan drive in the track driven military vehicle BvS10.

The efficiency of the pump and motors are summarized using data from the subcontractors and the efficiency of the pipe line system is derived using Bernoulli's formula for steady isothermal flow and the percentage opening of the proportional valve. Calculations are done in a number of different cases because of the vehicles supposed ability to operate at a wide scale of different temperatures and at very different types of terrain. These calculations are illustrated by graphs of how much pressure loss there is through the pipe line system.

To verify the results of the calculations a practical experiment was done. Fittings in two different sizes with hoses were connected to a hydraulic system and the pressure before and after were measured. The result of this experiment was that the difference between the practical and the theoretical pressure loss was greater for the smaller hoses and fittings compared to the larger ones. This amplified corresponding spots in the theoretical calculations.

Furthermore a simulation software called SimulationX was used to visualize how the different parts of the efficiency contributes to the total efficiency and to show how much the recommended changes would affect the system.},
  author       = {Lindbäck, Peter},
  keyword      = {vacuum technology,hydraulics,Mechanical engineering,SimulationX,Hydro motor,Hydro pump,Hydraulics,Volumetric efficiency,Hydro mechanical efficiency,vibration and acoustic engineering,Maskinteknik,hydraulik,vakuumteknik,vibrationer,akustik},
  language     = {swe},
  note         = {Student Paper},
  title        = {Further Development of a Hydraulic Fan Drive},
  year         = {2008},
}