Gustaf de Laval

Gustaf de Laval
de Laval 1875
Born	9 May 1845 Orsa, Dalarna, Sweden
Died	2 February 1913 (aged 67) Stockholm, Sweden
Nationality	Swedish
Alma mater	KTH Royal Institute of Technology Uppsala University
Known for	Steam turbines, dairy machinery, and the de Laval nozzle for rocket engines
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Karl Gustaf Patrik de Laval (Swedish pronunciation: [ˈɡɵ̂sːtav dɛ laˈvalː] ^ⓘ; 9 May 1845 – 2 February 1913) was a Swedish engineer and inventor who made important contributions to the design of steam turbines and centrifugal separation machinery for dairy.

Life

de Laval's forge in Kloster

Gustaf de Laval was born at Orsa in Dalarna in the Swedish de Laval Huguenot family (immigrated 1622 - Claude de Laval, soldier - knighted de Laval 1647). He enrolled at the Institute of Technology in Stockholm (later the Royal Institute of Technology, KTH) in 1863, receiving a degree in mechanical engineering in 1866, after which he matriculated at Uppsala University in 1867.

He was then employed by the Swedish mining company, Stora Kopparberg. From there he returned to Uppsala University and completed his doctorate in 1872. He was further employed in Kloster Iron works in Husby parish, Sweden.

de Laval was a member of the Royal Swedish Academy of Sciences from 1886. He was a successful engineer and businessman. He also held national office, being elected to Swedish parliament, from 1888 to 1890 and later became a member of the senate. De Laval died in Stockholm in 1913 at the age of 67.

Contributions

de Laval nozzle

In 1882 he introduced his concept of an impulse steam turbine and in 1887 built a small steam turbine to demonstrate that such devices could be constructed on that scale. In 1890, Laval developed a nozzle to increase the steam jet to supersonic speed, working from the kinetic energy of the steam, rather than its pressure. The nozzle, now known as a de Laval nozzle, is used in modern rocket engine nozzles. De Laval turbines can run at up to 30,000 rpm. The turbine wheel was mounted on a long flexible shaft, its two bearings spaced far apart on either side. The higher speed of the turbine demanded that he also design new approaches to reduction gearing, which are still in use today. Since the materials available at the time were not strong enough for the immense centrifugal forces, the output from the turbine was limited, and large scale electric steam generators were dominated by designs using the alternative compound steam turbine approach of Charles Parsons.

Using high pressure steam in a turbine that had oil-fed bearings meant that some of the steam contaminated the lube-oil, and as a result, perfecting commercial steam-turbines required that he also develop an effective oil/water separator. After trying several methods, he concluded that a centrifugal separator was the most affordable and effective method. He developed several types, and their success established the centrifugal separator as a useful device in a variety of applications.

De Laval cream separators and Alfa Laval

De Laval also made important contributions to the dairy industry, including the first centrifugal milk-cream separator and early milking machine, the first of which he patented in 1894. It was not until after his death, however, that the company he founded marketed the first commercially practical milking machine, in 1918. Together with Oscar Lamm, de Laval founded the company Alfa Laval in 1883, which was known as AB Separator until 1963 when the present name was introduced.

DeLaval

In 1991, Alfa Laval Agri, a company producing dairy and farming machinery was split from Alfa Laval when it was bought by the Tetra Pak Group. When Alfa Laval was sold, Alfa Laval Agri remained a part of the Tetra Pak group and was renamed DeLaval, after the company's founder.

Tributes

On 9 May 2013, Google celebrated Gustaf de Laval’s 168th birthday with a doodle.

Image gallery Gustaf de Laval

• 
  Gustaf de Laval at the age around 50.
• 
  Impulse Turbine by Gustaf de Laval. Built in Sweden, 1888. Deutsches Museum, Munich.
• 
  A unique submarine invented by Gustaf de Laval
• 
  The former De Laval steam turbine factory in Nacka outside Stockholm, now converted to a conference centre.

He is interred at Norra begravningsplatsen in Stockholm, Sweden.

See also

• History of the internal combustion engine

External links

• Alfa Laval - Official site
• DeLaval - Official site
• DeLaval - Unofficial site