51results about How to "Reduce pumping" patented technology

Methods and systems are provided for controlling an engine system with a variable cam timing device. In one example, the variable cam timing device is operated to adjust engine valve timing differently at engine stop based on whether the engine stop is in response to an operator request or in response to an automatic controller initiated engine stop without an operator request.

Apparatus and methods for removing jitter and stabilizing the feed back system of a torsional hinged device with minimal changes to the system. The stabilization is accomplished by introducing a selected amount of lateral motion (in addition to the rotational motion) by creating asymmetry in the oscillating device or the drive torque applied to the device.

The invention relates to a follow-up type high-efficiency water-stop and sand-hindrance precipitation complex system and its construction method. The system is suitable for all unconfined aquifers andconfined aquifers. The complex system includes a precipitation well, an infiltration-filtration device arranged in a well pipe of the precipitation well, a sand filter layer which the outside of thewell pips is filled, a follow-up type moving water-stop heavy curtain, a waterway-drain seepage well and a settlement observation point; the precipitation well is arranged in an annular mode along theedge of a foundation pit, and the infiltration-filtration device is composed of plum-blossom shaped distribution holes and steel wire gauzes with which the outsides of the plum-blossom shaped distribution holes are coated; the follow-up type moving water-stop and sand-hindrance heavy curtain is placed on the inner side of the precipitation well in an annular mode; the waterway-drain seepage wellis formed on the inner side of the heavy curtain, and the settlement observation point is arranged on the edge of the foundation pit. According to the system and the construction method, foundation-pit precipitation, infiltration-filtration water collection, underground water stop, grit eroding and pipe gush prevention, and settlement prevention and control technology are integrated into a whole system, the structure is flexible, precipitation is high in efficiency, the collaborative linkage property is good, the building cost of projects is low, the application range is wide, and surface subsidence and other engineering hazards caused by grit eroding and pipe gush can be effectively prevented.

A hydrostatic variator having a common yoke design and two or more bent axis piston drive units is disclosed in which the rotating group of a drive unit is arranged to be movable relative to the yoke to alter the angle between its drive shaft axis and rotating group axis independent of the other drive unit. This can be accomplished using movable sector plates coupled to the rotating groups that are arcuately movable within the yoke about the axis perpendicular to the respective drive shaft axes of the drive units. Such variators enjoy the response and packaging advantages of a common yoke design while still allowing dynamic adjustment of system size. In turn, varying system size allows for efficiency to be improved at conditions other than at the maximum design torque.

The invention discloses a day-and-night photovoltaic pump system with no storage battery and belongs to the technical field of solar photovoltaic and fuel chemical energy usage. The system mainly comprises a solar-thermal power generation system, a variable frequency controller, an alternating current motor, a water pump, a water tank, a low water level sensor, a medium water level sensor and a high water level sensor, wherein the solar-thermal power generation system comprises a butterfly type reflector, a secondary lens, a disk radiator, a filter layer, a thermal infrared light battery, a reflector, a combustion chamber and a cooling device. The efficiency of the solar-thermal power generation system is higher than that of an ordinary solar photovoltaic power generation system, and same output power needs few photovoltaic batteries, and accordingly, the cost of the whole system is reduced. The photovoltaic pump system with no storage battery is environment friendly and can operate day and night, and the defect that the photovoltaic pump system with no storage battery cannot pump water in rainy days or at nights is overcome. Simultaneously, the photoelectric conversion efficiency of the photovoltaic batteries in prior photovoltaic pump systems with no storage battery is improved and the size of the water tank is reduced.

The invention relates to a sealing device for a gas-liquid two-phase fluid medium under variable working conditions. The sealing device has a rotating shaft and a casing, and the cavity formed by the casing is used to accommodate the gas-liquid two-phase fluid medium; the sealing The device also includes a cooperating labyrinth seal mechanism and a double-end hydrodynamic mechanical seal mechanism, and a seal buffer chamber is arranged between the labyrinth seal mechanism and the fluid dynamic mechanical seal mechanism, wherein the hydrodynamic mechanical seal The mechanism has a stationary ring and a moving ring that are in contact with each other. Through the design of the stepped trapezoidal convex teeth of the labyrinth seal channel, the throttling and pressure reduction effect of the labyrinth seal, and the attenuation of the medium pressure fluctuation by the seal buffer chamber, the structural design of the micropore group on the static ring end face, the dynamic ring seal end face The inclination design and the limit function of the limit sleeve realize the good sealing performance and sealing stability of the dynamic pressure seal of the gas-liquid two-phase fluid medium under variable working conditions.

The invention discloses a method for gradient utilization of oxygen-enriched combustion heat. The method comprises the following steps of: (A) dividing the outlet smoke of a boiler (1) into a first part of smoke, a second part of smoke and a third part of smoke, feeding the first part of smoke into a hearth of the boiler (1) as circulating smoke, preheating the oxygen fed into the boiler (1) by the second part of smoke, and heating the high-pressure and low-pressure feed water of the boiler (1) by the third part of smoke; (B) feeding the second part of smoke and the third part of smoke into a smoke condenser (17) after heat exchange, condensing to normal temperature and feeding into a smoke compressor (10); and (C) compressing air by an air compressor (7), cooling by a compressed air low-pressure feed water heater (8) and feeding into an oxygen generation system (9), and feeding the oxygen generated by the oxygen generation system (9) into an oxygen preheater (2). According to the invention, the power generation efficiency of an oxygen-enriched combustion power station is improved, and the CO2 trapping cost of the coal-fired power plant is reduced.

The invention discloses a vacuum calcination furnace, which relates to the technical field of calcination, comprising: a cylinder, which includes a first cylinder part and a third cylinder part arranged at one end of the first cylinder part; a vacuum suction head, which is arranged laterally In the cylinder, for vacuuming the inside of the cylinder, one end of the vacuum suction head is arranged in the third cylinder part, and the vacuum suction head is located in the third cylinder part One end has an exhaust port for exhausting the gas in the cylinder. The beneficial effect of the present invention is that it can reduce or even prevent the powdery raw materials from being sucked away in the calciner, improve the service life of the vacuum device, reduce raw material loss, and save production costs; It leads to the loss of raw materials, and avoids the situation of blocking the vent hole. It can also drive the flow of gas, so that the raw materials can be mixed evenly, and the production efficiency can be improved.