The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Eckhard A. Groll - One of the best experts on this subject based on the ideXlab platform.
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Spool Compressor Tip Seal Design Considerations and Testing
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:The simple analysis, Design, construction and testing of the spool compressor’s tip Seal is presented. Analysis yields key Design considerations for Seal geometry, preloading and pressure balance. Several Seal Designs are constructed and tested for leakage. Volumetric efficiency is calculated for three tip Seal configurations and presented as a function of pressure ratio. It is determined that a two piece Seal that expands axially results in less leakage. Further, it is determined that fluid pressure activation of the tip Seal improves performance and eliminates the need for a highly loaded biasing spring. It is concluded that the tip Seal performance is acceptable for a production compressor and can be constructed such that it would provide an acceptable service life.
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Spool Seal Design and Testing for the Spool Compressor
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:Several Seals, Designed to minimize leakage between the rotating spool assembly’s endplates and the stationary compressor housing, are introduced, constructed and tested. Some Designs are deemed impractical due to either high leakage or high torque. A novel one piece hybrid Design that blends the function of a face Seal and piston ring is tested and shown to achieve excellent results. A test apparatus is introduced to isolate and measure the spool Seal’s performance independent of the compressor. It is concluded that the hybrid Design is highly effective and well suited for many applications of the spool compressor.
Craig R Bradshaw - One of the best experts on this subject based on the ideXlab platform.
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Spool Seal Design and Testing for the Spool Compressor
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:Several Seals, Designed to minimize leakage between the rotating spool assembly’s endplates and the stationary compressor housing, are introduced, constructed and tested. Some Designs are deemed impractical due to either high leakage or high torque. A novel one piece hybrid Design that blends the function of a face Seal and piston ring is tested and shown to achieve excellent results. A test apparatus is introduced to isolate and measure the spool Seal’s performance independent of the compressor. It is concluded that the hybrid Design is highly effective and well suited for many applications of the spool compressor.
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Spool Compressor Tip Seal Design Considerations and Testing
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:The simple analysis, Design, construction and testing of the spool compressor’s tip Seal is presented. Analysis yields key Design considerations for Seal geometry, preloading and pressure balance. Several Seal Designs are constructed and tested for leakage. Volumetric efficiency is calculated for three tip Seal configurations and presented as a function of pressure ratio. It is determined that a two piece Seal that expands axially results in less leakage. Further, it is determined that fluid pressure activation of the tip Seal improves performance and eliminates the need for a highly loaded biasing spring. It is concluded that the tip Seal performance is acceptable for a production compressor and can be constructed such that it would provide an acceptable service life.
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Spool compressor tip Seal Design considerations
8th International Conference on Compressors and their Systems, 2013Co-Authors: Craig R BradshawAbstract:ABSTRACT The rotary spool compressor is a novel compressor type which combines various aspects of rotary and reciprocating devices. The tip Seal of this compressor is a dynamic Sealing element which should be well understood for maximum performance. An analysis which combines the hydrodynamic film theory balanced with the tip Seal dynamics is presented. This model is explored over a variety of tip Seal radii, widths, and mechanical spring rates. The experimental volumetric efficiency of a prototype compressor with various Seal radii and mechanical spring rates is compared against the model predicted results and shows similar trends.
Greg Kemp - One of the best experts on this subject based on the ideXlab platform.
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Spool Compressor Tip Seal Design Considerations and Testing
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:The simple analysis, Design, construction and testing of the spool compressor’s tip Seal is presented. Analysis yields key Design considerations for Seal geometry, preloading and pressure balance. Several Seal Designs are constructed and tested for leakage. Volumetric efficiency is calculated for three tip Seal configurations and presented as a function of pressure ratio. It is determined that a two piece Seal that expands axially results in less leakage. Further, it is determined that fluid pressure activation of the tip Seal improves performance and eliminates the need for a highly loaded biasing spring. It is concluded that the tip Seal performance is acceptable for a production compressor and can be constructed such that it would provide an acceptable service life.
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Spool Seal Design and Testing for the Spool Compressor
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:Several Seals, Designed to minimize leakage between the rotating spool assembly’s endplates and the stationary compressor housing, are introduced, constructed and tested. Some Designs are deemed impractical due to either high leakage or high torque. A novel one piece hybrid Design that blends the function of a face Seal and piston ring is tested and shown to achieve excellent results. A test apparatus is introduced to isolate and measure the spool Seal’s performance independent of the compressor. It is concluded that the hybrid Design is highly effective and well suited for many applications of the spool compressor.
Joe Orosz - One of the best experts on this subject based on the ideXlab platform.
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Spool Compressor Tip Seal Design Considerations and Testing
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:The simple analysis, Design, construction and testing of the spool compressor’s tip Seal is presented. Analysis yields key Design considerations for Seal geometry, preloading and pressure balance. Several Seal Designs are constructed and tested for leakage. Volumetric efficiency is calculated for three tip Seal configurations and presented as a function of pressure ratio. It is determined that a two piece Seal that expands axially results in less leakage. Further, it is determined that fluid pressure activation of the tip Seal improves performance and eliminates the need for a highly loaded biasing spring. It is concluded that the tip Seal performance is acceptable for a production compressor and can be constructed such that it would provide an acceptable service life.
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Spool Seal Design and Testing for the Spool Compressor
2013Co-Authors: Greg Kemp, Craig R Bradshaw, Joe Orosz, Eckhard A. GrollAbstract:Several Seals, Designed to minimize leakage between the rotating spool assembly’s endplates and the stationary compressor housing, are introduced, constructed and tested. Some Designs are deemed impractical due to either high leakage or high torque. A novel one piece hybrid Design that blends the function of a face Seal and piston ring is tested and shown to achieve excellent results. A test apparatus is introduced to isolate and measure the spool Seal’s performance independent of the compressor. It is concluded that the hybrid Design is highly effective and well suited for many applications of the spool compressor.
K Neaylon - One of the best experts on this subject based on the ideXlab platform.
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Towards incorporating heavy vehicles into sprayed Seal Design: stage 2
2015Co-Authors: K NeaylonAbstract:Traffic loadings on Australiars extensive sprayed Seal network have increased, particularly with freight efficiency resulting in longer and heavier loads being transported by prime movers. This report details the development of a model to describe how different axle loads and axle groupings combine to cause surface texture decay on a sprayed Seal. Development of the model relied on experimental data generated by the Australian linear accelerated loading facility. The model was then validated using another set of data generated by the New Zealand Canterbury Accelerated Pavement Testing Indoor Facility. From the data, a load damage exponent of 1 for sprayed Seal wear was calculated based on analysis of a dual tyre tandem axle traversing a sprayed Seal. This suggests that the load damage to a sprayed Seal is linear as opposed to the power function model currently used in pavement Design. The research findings can be used to investigate if the Austroads Seal Design method needs refinement in terms of equivalent heavy vehicles calculation.
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Update of double/double Design for Austroads sprayed Seal Design method
2013Co-Authors: Walter Holtrop, K Neaylon, R Busuttil, J Esnouf, J Jones, S PatrickAbstract:This document is an update of the Design procedure for double/double sprayed Seal surfacing. The information supersedes that in Update of the Austroads Sprayed Seal Design Method, and replaces Sections 6, 7 and 8 in that document. These are based on the philosophy of filling voids in the aggregate matrix with binder to a depth of about one half to two thirds the height of the aggregate when lying on its least dimension. Adjustments and allowances are incorporated in the procedures to cater for aggregate shape, traffic level, embedment, existing surface texture, hardness of existing surfaces and absorption of binder by either aggregates or the existing substrate. The Design procedures cover double/double Seals with Class 170 bitumen, Class 320 bitumen, multigrade binder, polymer modified binder and emulsions. A preliminary sprayed Seal selection table is also included.
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the effects of heavy vehicle single tandem and triaxle groupings on sprayed Seal wear stage 1
ISBN 978-1-921991-44-8, 2012Co-Authors: K NeaylonAbstract:The majority of sprayed Seal Design methods around the world are based on the work of Hanson, published in 1935. To this day, Hansonrs work forms the basis of Seal Design methods in New Zealand, Australia, South Africa, and parts of the USA. However, there are growing weaknesses in current sprayed Seal Design models. Traffic loads have increased, particularly in both the number of heavy vehicles, and the loads that individual prime movers are now hauling. An explanation of quantitative and qualitative aspects of the wear (defined here as reduction in surface texture) effects of single axle, tandem axle and triaxle groups on Seal performance should assist in improving the way that the effect of heavy vehicles is incorporated into the current Australian Seal Design method. In September 2008 a test pavement consisting of unbound granular basecourse with a double/double sprayed Seal was constructed at the current Accelerated Loading Facility (ALF) site in Dandenong South, Melbourne. This pavement is being repetitively loaded with varying combinations of single axle, tandem axle and triaxle loading cycles, whilst surface texture measurements are being recorded. Analysis of the surface texture reduction supports the hypothesis that axles of the same loadings but in clustered groupings cause a significantly different reduction in surface texture than in smaller groupings. The analysis also supports the hypothesis that the pavement Design concept of equivalent standard axles is not applicable to sprayed Seal Design.
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The equivalent heavy vehicle concept in Australian sprayed Seal Design
2008Co-Authors: K Neaylon, R Spies, A AldersonAbstract:The foremost challenge facing Australian spray Seal Designers is the performance of sprayed Seals under the increasing numbers of large heavy vehicles on major transportation routes connecting capital cities and in rural areas of New South Wales, Queensland and Western Australia. It is expected that the Australian freight task will increase by 25 per cent between 2000 and 2010, with most of this increase already occurring. Based on data collected in rural areas, the traffic adjustment for heavy vehicles was amended in the 2006 update of the Austroads sprayed Seal Design method. This paper discusses the investigation currently being conducted into the effect of these large heavy vehicles on sprayed Seals, and the concept and development of equivalent heavy vehicles introduced in the Australian Design method in 2006. This paper describes the next steps in rationalising this concept.
