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Vidareutveckling av en hydraulisk fläktdrift

Lindbäck, Peter (2008) MMK820
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... (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
course
MMK820
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Hydraulics, hydro mechanical efficiency, volumetric efficiency, hydro pump, hydro motor, SimulationX
language
Swedish
id
1502744
date added to LUP
2009-11-24 15:34:13
date last changed
2010-02-01 14:40:04
@misc{1502744,
  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      = {Hydraulics,hydro mechanical efficiency,volumetric efficiency,hydro pump,hydro motor,SimulationX},
  language     = {swe},
  note         = {Student Paper},
  title        = {Vidareutveckling av en hydraulisk fläktdrift},
  year         = {2008},
}