ON SEALING PROBLEMS IN ROTARY EPICYCLOIDAL MACHINES

This paper deals with the mechanical problems referring to the sealing of the rotor in the housing of rotating epicycloidal machines. This theoretical analysis is performed mainly on the wankel type machine, which leaves several problems of sealing open, from the thermodynamic and mechanical points of view. The results confirm the oscillating notion of the apex seal in its slot, as it appears in the experimental tests. The apex seal moves periodically under the action of gases and of inertial forces, with sliding, vibration and impact against the walls; several hypothesis were adopted regarding the action of gases against the sides of the apex seals, and they confirmed the results of oscillating motion, explaining also the influence of the angular speed and of the shapes of the seals. This paper is developed by means of the techniques of computer aided design, with an interactive computing system, both for the automatic design of the profiles, and the analysis of the results. Only the use of these interactive computing techniques has the analysis of the equations, which are affected by a very large number of different parameters, for the study of the behaviour of the sealing apex in various working conditions been made possible. /Author/TRRL/

• Supplemental Notes:
  • Sixteenth International Automobile Technology Congress.
• Corporate Authors:

  International Federation of Auto Techniques Engs

  3 Avenue du President Wilson
  F 75116 Paris,   France 

  International Federation of Auto Techniques Engs

  3 Avenue du President Wilson
  F 75116 Paris,   France 
• Authors:
  • Rovetta, A
• Publication Date: 0

Language

• English

Media Info

• Pagination: p. 1
• Serial:
  • Publication of: International Federation of Auto Techniques Engs
  • Issue Number: 0
  • Publisher: International Federation of Auto Techniques Engs

Subject/Index Terms

• TRT Terms: Angular velocity; Computer programs; Conferences; Digital computers; Gases; Impacts; Rotary engines; Sealing (Technology); Vibration; Wankel engines
• Uncontrolled Terms: Sliding
• Old TRIS Terms: Sealing
• ITRD Terms: 8525: Conference; 8673: Digital computer; 1305: Rotary engine
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00163353
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jan 13 1978 12:00AM