摘要:
A jet pump has a jet nozzle that discharges an operating fluid, a chamber into which a transfer fluid flows and which encloses the end of the jet nozzle, a throat pipe having a constriction portion and a jet nozzle through which the transfer fluid that flows into the chamber is discharged. The discharge end of the throat pipe has a smaller diameter than the base end, and is bent at an angle of approximately 90 degrees from the base end.
摘要:
A pneumatic driving device and the associated method for micro fluids, wherein the pneumatic driving device for micro fluids is constructed by connecting a fluid pipe with a structure that is formed by two gas stream inlets, a gas stream fender, a gas stream flow path and a gas stream outlet. The suction, exclusion and stagnation for the micro fluids inside the fluid pipes can be accomplished by adjusting the flow rates of the gas streams into the device at the two gas stream inlets. In the invention several pneumatic driving devices are connected to form a single recursive pneumatic driving device by the concept of recursion, and the micro fluids inside several fluid pipes can be controlled to mix or to separate through the recursive pneumatic driving device by adjusting the flow rates of the gas streams into the device at different gas stream inlets.
摘要:
An ejector can obtain a sufficiently large suction air quantity without reducing the ultimate vacuum. A diffuser is disposed downstream of a nozzle to form a single Laval nozzle. A suction port is provided between the nozzle and the diffuser. The inlet of the diffuser is enlarged in width so that the side walls thereof extend approximately parallel to each other along the axis of the diffuser over a predetermined length. When air is caused to flow from an inlet closer to the nozzle toward an outlet by the engine intake negative pressure, the flow velocity at a throat portion reaches the sound velocity owing to the effect of the Laval nozzle. Consequently, a high negative pressure is generated at the suction port. The parallel portion formed by enlarging the inlet of the diffuser allows the suction air quantity to be increased without reducing the effect of the Laval nozzle.
摘要:
A suction jet nozzle and a diffuser having an inflow cone with an elliptical cross-section is implemented in a suction jet pump to be used in a motor vehicle's fuel tank. The jet nozzle is configured to produce a flat propulsion jet that seals the diffuser over its entire circumference.
摘要:
A liquid-gas jet apparatus has an axisymmetric active nozzle and a mixing chamber. When the ratio between the surface area of the cross-section of the mixing chamber's throat and the surface area of the cross-section of the nozzle's throat ranges from 10 to 200, then the value of the radial and angular misalignment between the nozzle and the mixing chamber varies from 0.1 mm to 12 mm and from 2″ to 5°30′, respectively. When the ratio of the surface area of the cross-section of the mixing chamber's throat to the surface area of the cross-section of the nozzle's throat ranges from 200 to 1600, then the value of the radial and angular misalignment between the active nozzle and the mixing chamber varies from 0.14 mm to 25 mm and from 2.5″ to 10°30′, respectively. A Jet apparatus realized according to the above-mentioned dimensions exhibits an improved operational efficiency.
摘要:
The invention relates to the field of jet technology. The surface area of the minimal cross-section of the mixing chamber represents from about 1.1 to about 7.98 times that of the minimal cross-section of the active liquid nozzle. A liquid-gas jet apparatus with the above described correlation of sizes has a higher efficiency due to reduced energy losses.
摘要:
A self-compensating, energy saving heat transfer unit to provide an efficient means to transfer energy from steam to water in a central heating system. The steam enters a mixing chamber and creates a negative pressure environment. Water in a backwater pipe, which is at a lower temperature and pressure, is absorbed into the mixing chamber where energy is passed from the steam to the water. The water then leaves the first mixing chamber and enters a second mixing chamber where compensation water is added to make up for the possible loss of water that may occur in the central heating system. The heated water then exits the heat transfer unit and goes back into the central heating system. After being cooled in the central heating system, the water then reenters the heat transfer unit at the backwater pipe and continues the cycle over again.
摘要:
A liquid jet pump for moving a wide variety of material is described. The liquid jet pump is comprised of a nozzle assembly and a target tube, and defines a suction chamber. The nozzle assembly is configured to pull in gas, causing a gas bearing effect wherein a layer of gas surrounds the liquid jet flow exiting the nozzle assembly. The liquid jet passes through the suction chamber with minimal deflection, reducing cavitation and improving mixing as educted materials enter the suction chamber and combine with the liquid jet. The combined material is directed into the target tube, which preferably is designed to detach from the other components and is composed of abrasion-resistant material. The target tube absorbs the majority of wear, and provides ease of changing parts. The nozzle assembly is preferably positioned within the suction chamber in a way which maximizes vacuum, and the vacuum is maintained in relation to the pressure or vacuum produced by a downstream pump in a unique way, by controlling the gas flow into the nozzle assembly. In this way, the pump realizes drastic and surprising increases in solids pumping efficiency and solids/liquid mixing efficiency.
摘要:
An improved liquid jet pump for moving solid or other materials is provided. The liquid jet pump includes a nozzle assembly, a suction chamber, and a target tube. The nozzle assembly pulls in atmospheric air, causing an air bearing effect around the liquid jet exiting the nozzle assembly. The liquid jet passes through the suction chamber with minimal deflection, reducing cavitation and improving mixing as educted materials enters the suction chamber and combines with the liquid jet. The combined material is directed into the target tube, which is designed to detach from the other components and is composed of abrasion-resistant material. The target tube absorbs the majority of wear, and provides ease of changing parts.
摘要:
The mixing chamber of a liquid jet apparatus is composed of a convergent inlet section and a cylindrical outlet section and the ratio between of the surface area of the minimal cross-section of the mixing chamber and the surface area of the inlet cross-section of the mixing chamber ranges from 0.005 to 0.392, and the angle of inclination between either the ruling line of a conical surface forming the convergent inlet section of the mixing chamber or the tangents to each point of a curved surface forming the convergent inlet section and the flow axis of the mixing chamber ranges from 30′ to 10°. In another embodiment of the jet apparatus, the whole mixing chamber converges in the flow direction and the ratio of the surface area of the minimal cross-section of the mixing chamber to the surface area of the inlet cross-section of the mixing chamber ranges from 0.005 to 0.392, and the angle of inclination between either the ruling line of a conical surface forming the convergent mixing chamber or the tangents to each point of a curved surface forming the convergent mixing chamber and the flow axis of the mixing chamber ranges from 30′ to 10°. A jet apparatus realized according to the above-mentioned dimensions exhibits an improved efficiency.