Topic
Pneumatic trough
About: Pneumatic trough is a research topic. Over the lifetime, 7 publications have been published within this topic receiving 28 citations.
Papers
TL;DR: The pneumatic trough as mentioned in this paper is a seminal device for the generation, collection, and manipulation of gases, and it was used by Torbern Bergman, Henry Cavendish, Karl Scheele, Joseph Priestley, and their contemporaries to stimulate the studies of Lavoisier toward creation of new chemistry.
Abstract: ALTHOUGH THE SOLID and liquid states of matter are the more tangible, it was the study of gases which laid the foundations for the Chemical Revolution. The contributions in pneumatic chemistry made by Torbern Bergman, Henry Cavendish, Karl Scheele, Joseph Priestley, and their contemporaries served to stimulate the studies of Lavoisier toward creation of the new chemistry. All of these studies became possible as a result of the development of an apparatus for the generation, collection, and manipulation of gases-the pneumatic trough. Despite the significance and simplicity of this device, its invention and improvement were fraught with major difficulties. Since the literature dealing with pneumatic chemistry contains a significant number of ambiguities and lacunae regarding the invention and development of the trough, it is the purpose of this paper to examine the sequence of contributions in order to clarify the picture. 1 Did the apparatus of Robert Boyle and John Mayow, for example, represent a kind of primitive trough, as is sometimes alleged ?2 Why did Stephen Hales develop the apparatus which we recognize as the pneumatic trough, and what were the motivations of other workers in developing their innovations? Was the substitution of mercury for water in the trough made by Cavendish or Priestley ?3 The element "air" was treated through the earlier centuries as a substance exemplifying the qualities of hot and wet in the ultimate degree. There was nothing to suggest that air might be a mixture of gases, and even had the suggestion been made, the tools of the day would have prevented any serious effort to divide atmospheric air into its several components. During the period of alchemy, covering more than one and a half millennia, air was looked upon as an elemental substance rather than simply a substance exemplifying the gaseous state of matter.
15 citations
Patent•
10 May 2006
TL;DR: In this paper, a three-phase front processor for inner-loop anaerobic reactor, which contains at least two layers of inversed V-type horizontal pneumatic troughs of cross distribution and a 'pii' type horizontal collector trough connecting to a lift leg on the top, one end of the pNE connecting vertically to the side plate of the collector trough, and the lower end between adjacent horizontal pNEs having passages for liquid and particles.
Abstract: The invention discloses a three-phase front processor for inner-loop anaerobic reactor, which contains at least two layers of inversed V-type horizontal pneumatic troughs of cross distribution and a 'pii‚-type horizontal collector trough connecting to a lift leg on the top, one end of the pneumatic trough connecting vertically to the side plate of the collector trough, and the lower end between adjacent horizontal pneumatic troughs having passages for liquid and particles. The device is characterized in that the passage opening connecting below middle of the pneumatic trough and the side-plate of collector trough is trapezoidal, the lower side of trapezoidal passage opening is higher than that of the pneumatic trough, the other side of the pneumatic trough is equipped with a triangular block which has constant section to the pneumatic trough, and a gas chamber is formed above the trapezoidal passage opening of the pneumatic trough. The merit of the invention is characterized in that it is beneficial for the growing of particle sludge, to decrease substantially the leak of minute particle sludge and improve the liquid stream in biochemical reaction field.
4 citations
Patent•
15 Sep 2004
TL;DR: In this paper, a kind of dynamic pressure ball bearing and the processing method of pneumatic troughs is described. But the method is not suitable for the use of dynamic bearing and its design is not ideal.
Abstract: The invention discloses a kind of dynamic pressure ball bearing and the processing method of pneumatic trough, the dynamic pressure ball bearing has a series of inclined pneumatic troughs. It is made up of bearing bowl and semisphere ball head, there sets several row of pneumatic troughs, each row of pneumatic troughs are winding on the semisphere surface of ball head, each row of pneumatic troughs group are made up of several even distributed pneumatic troughs, the top of the pneumatic trough in each row is connected with the ring slot or the upper end surface of ball head, there sets a ventilation hole at position correspondent to the ring slot between the inner surface and outer surface of the bearing bowl. It solves the problem that the lubrication of dynamic bearing is not ideal, its design is reasonable, reliable, and low price. The method is: 1. cleans the surface of ball head; 2. 2. Plates a layer of even metal layer or diamond film as the working layer on the semisphere surface; 3. Carries on mask etching to the working layer and generates pneumatic troughs.
4 citations
Patent•
24 Jul 2013
TL;DR: In this paper, a reaction cavity and a heating component are used to clean a graphite plate or an epitaxial substrate slice needing to be cleaned, and the heating component can be operated to increase the temperature inside the reaction cavity; and the etching and roasting equipment also comprises the circulating air cooling system which comprises an air blower, a top pneumatic trough, a bottom pNE trough, an air cavity, and a heat exchanger.
Abstract: The invention provides etching and roasting equipment The etching and roasting equipment comprises a reaction cavity and a heating component, wherein the reaction cavity is used for containing a graphite plate or an epitaxial substrate slice needing to be cleaned, and the heating component is arranged on the outer side of the reaction cavity and can be operated to increase the temperature inside the reaction cavity; and the etching and roasting equipment also comprises the circulating air cooling system which comprises an air blower, a top pneumatic trough, a bottom pneumatic trough, an air cavity and a heat exchanger, wherein the air blower enables air currents to circulate, the top pneumatic trough is arranged above the reaction cavity, the bottom pneumatic trough is arranged below the reaction cavity, the air cavity is communicated between the top pneumatic trough and the bottom pneumatic trough and is arranged on the periphery of the reaction cavity, air currents in the air cavity are introduced for cooling the heating component, and the heat exchanger is connected to the downstream of the bottom pneumatic trough through a circulation air channel The normal heating and use of the etching and roasting equipment provided by the invention can be ensured as related heating and heated parts inside an air flue of a reaction cavity body can be cooled
3 citations
Patent•
15 Sep 2004
TL;DR: In this article, a kind of dynamic pressure ball bearing and the processing method of pneumatic troughs is described. And the method includes following steps: 1, cleans; 2. plates a layer of even metal layer or diamond film as the working layer on the semisphere surface; 3. carries on mask etching to the working layers and generates pneural troughs.
Abstract: The invention discloses a kind of dynamic pressure ball bearing and the processing method of pneumatic trough. It is made up of bearing bowl and semisphere ball head, there sets several pneumatic troughs on the surface of semisphere, the troughs extend to the bottom of the ball head from the upper edge, the angle alpha between the tangent on the crossing point of pneumatic trough and the semisphere surface and the pneumatic trough is between 10degrees and 80degrees. Because that there will generate a air film which can bear the stress between the bearing bowl and the ball head, it solves the problem that the lubricate of dynamic bearing is not ideal. The invention is reasonable, low cost. The invention also provides the processing method of pneumatic troughs, the method includes following steps: 1, cleans; 2. plates a layer of even metal layer or diamond film as the working layer on the semisphere surface; 3. carries on mask etching to the working layer and generates pneumatic troughs.
3 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2013 | 1 |
| 2006 | 1 |
| 2004 | 2 |
| 1992 | 1 |
| 1969 | 1 |