Abstract:
An ultra high head pumpturbine power generating plant with a turbine having a runner rotating with water flow supplied through a high head conducting tube. A rotary electric machine rotates with rotation of the runner. The head is in the range of 400-600 m, and the runner is at least 5 meters in diameter. The said runner has characteristics of toughness at room temperature: at least 500 N/mm.sup.2, or tensile strength at room temperature: at least 650 N/mm.sup.2, elongation at least 16%, reduction of area at least 45%, 2 mm U-notch impact value at 0.degree. C. at least 100 J, and fracture toughness at least 6000 N/mm.sup.3/2.
Abstract:
An improved fluid section for piston type paint pumps having the piston made from unplated stainless steel and wherein the seal is a multiple lip type formed of ultra-high molecular weight polyethylene and the seal further includes one or more U-shaped internal stainless steel springs.
Abstract:
A cast piston which includes a metal insert and a combustion bowl, with the metal insert defining a sharp undercut structure at an upper portion of the combustion bowl. The sharp undercut structure of the insert contains combustible gases and helps improve emissions. The metal insert also strengthens the head of the piston. The cast piston is fabricated by positioning the metal insert in a casting mold and casting a piston in the mold. The final shape of the combustion bowl is produced by a machining process which forms the sharp undercut structure on the insert.
Abstract:
A diesel engine (10) has a pre-combustion chamber (30) with an angled and tapered transfer passage (60) leading to the main combustion chamber (44). The transfer passage (60) is tapered to provide a larger lower end (62) facing the main chamber (44) and smaller upper end (64) facing the pre-combustion chamber (30). Air passing through the passage (60) during the compression stroke undergoes heating and swirling within the pre-combustion chamber. The piston has an upper surface (46) with recessed lobes (20) and (22) and recessed passage area (28). Each recessed lobe functions as a valve pocket for the respective intake valve (32) and exhaust valve (42). The valve pockets are deep enough to provide sufficient valve lifts to allow valve overlap periods comparable with spark ignition gasoline engines without interfering with the piston upper surface (46).
Abstract:
A liquid pump adapted for pumping liquids containing high percentages of solids in suspension, including a foot valve and pumping chamber, and having an insert in the pumping chamber adjacent the foot valve seat, the insert having a resilient inner surface and an outer metallic rim, the inner resilient surface forming flanges about the edges of the rim, and the insert being clamped between the valve seat and another member.
Abstract:
A pump has in a housing a revolvable shaft which drives a piston stroke guide body. Drive pistons are provided with piston shoes which run on the guide face of the piston stroke guide body and drive fluid supply pistons of smaller diameter. The pump preferies a fluid separator between lubricating and non-lubricating fluid, like for example, between oil and water, whereof one of the fluids flows through an inner chamber which is provided with inlet and outlet valves while the outer fluid acts in an outer chamber which is open toward the cylinder wherein the fluid supply piston reciprocates. Dead space fillers are provided to prevent losses by compression of fluid and seal means are assembled to prevent leakage of fluid from one into the other of the chambers. The fluid separator may be compressible and expandable within the plastic deformable range of the material whereof it is made. The pump includes sophisticated technologies which necessiated more than half a decade of intensive research and testing but it is now capable of pumping fluid, including water, of several thousand atmospheres of pressure.
Abstract:
A ceramic-metal composite body including (a) a ceramic member, (b) a ferrous metal member bonded to the ceramic member, (c) an intermediate metallic member joined to the iron base member, and (d) an aluminum member bonded to the intermediate metallic member. The ceramic member and the aluminum member are integrally joined through the ferrous metal member and the intermediate metallic member.
Abstract:
Light alloy components for internal combustion engines consist of castings in which reinforcing layers consisting of non-woven ceramic fibers are embedded in the stressed surface portions. In order to provide a prolonged protection against damage to the light alloy disposed under the reinforcing layer, the open interstices of the fibrous layer are impregnated with a layer of a ceramic material in the portion which is close to the stressed surface and with the light alloy of the component in the portion which is remote from the stressed surface.
Abstract:
Conventional direct-injection internal combustion engines having a fuel injector with multiple fuel spray orifices will not completely ignite and burn relatively lower-cetane-number alternative fuels such as 100 percent methanol or ethanol. That is because the fuel spray injection pattern, per se, usually cannot carry or propagate a flame to all the injected fuel which is typically made up of individual fuel streams which are separated by sectors of fuel-deficient intake air. The present fuel combustion system (10) includes a multiple-orifice fuel injector (22), a baffle (138) having a concave surface (146), and a fuel ignition-initiating device (22) such as glow plug positioned generally in spaced relation between the fuel injector (22) and the concave surface (146). The baffle (138) intercepts and temporarily maintains a stoichiometric preselected portion (34,38) of at least one, and preferably two, fuel streams (102,106) in ignitable proximity to the fuel ignition-initiating device (26) to positively start a localized flame (42) of burning fuel. The baffle (138) controlledly reflects and rapidly directs the resultant expanding flame (42) of burning fuel to all of the remaining fuel streams (110) so that they are interconnectedly bridged with the flame (42) and thereby positively ignited.
Abstract:
In the European patent application publication EP OS No. 0 102 441 a high pressure pump is shown which uses tapered rings (disc spring derivatives) which are clamped together as a pump chamber. The clamping rings required cutting into sections which is expensive and time consuming. The present discoverings now show that the friction at compression of the coned rings was very large. The present invention now discovers that radially flexible ring portions should be provided to the coned ring portions in order to eliminate the friction and to reduce the time and cost of the production of the pump arrangement.