4results about How to "Increase inlet pressure" patented technology

The vehicle-mounted multi-duct underwater propeller comprises a pipe body and a rotor, and a first duct and a second duct which are communicated with each other are arranged in the pipe body; in the direction from the first duct to the second duct, the inner diameter of the first duct is gradually increased from the end, away from the second duct, of the first duct to the end, close to the second duct, of the first duct; the rotor is rotationally arranged in the water inlet end of the second duct. By additionally arranging the first duct and the second duct, water flow is guided to be sprayed out from a specific outlet, and it is guaranteed that the propeller can be applied to a vehicle. The inner diameter of the first duct is gradually increased from the end away from the second duct to the end close to the second duct, so that water flow is gradually decelerated, the inlet pressure of the rotor is increased, and the rotor is assisted to avoid cavitation. And by reducing the chord length, reducing the load of a low-pressure area, unloading the low-pressure area of the rotor and increasing the pressure of the low-pressure area, the cavitation phenomenon generated when the pressure is lower than medium saturated vapor pressure is avoided, and the working efficiency of the propeller is improved.

The invention discloses a CO2 efficient burying and reinjection system and method based on liquid phase injection, and belongs to the technical field of liquid phase CO2 reinjection. The system comprises a pipe tank precooling system, a first-stage injection pipeline supercooling system, a pipeline overpressure bypass pressure relief system, a pressurizing medium backflow pressure supplementing system and an underground plug removal injection system. The problems that a first-stage injection pipeline is vaporized, overpressure is directly released after stopping transportation, the pressure of a storage tank is too low in the middle and later periods of reinjection, and underground blockage is caused during reinjection can be effectively relieved.

A multi-start carrier power system, the design includes the power system architecture of the main power module, the auxiliary power module and the supercharged delivery module, the reusable carrier power scheme, the unified propellant type used by the main and auxiliary power systems, the simplified carrier power system, the improved reusable maintenance of the carrier power system, the realization of the multi-start function and the start number not limited by the starting device, with the multi-start, multi-reuse ability, while reducing the difficulty of power architecture design, the internal design optimizes the layout space, which simplifies the ignition system, improves the ignition reliability and stability, and the ignition number is not limited.

The utility model belongs to the technical field of diesel engines, and discloses an oil injection system and an engine, the oil injection system comprises an oil tank, an oil delivery pump, an electric control pressure release valve, an oil mass metering unit, an oil injection pump and a common rail pipe, an oil outlet of the oil delivery pump is communicated with an oil inlet of the oil mass metering unit and an oil inlet of the electric control pressure release valve in parallel, an oil outlet of the electric control pressure release valve is communicated with the oil tank, an oil outlet of the oil mass metering unit is communicated with an inlet of the oil injection pump, and an outlet of the oil injection pump is communicated with an oil inlet of the common rail pipe. The engine comprises the oil injection system and further comprises an oil injector, an oil inlet of the oil injector is communicated with an oil outlet of the common rail pipe, and an oil outlet of the oil injector is communicated with an oil tank. According to the oil injection system, the electronic control pressure release valve is arranged to replace a traditional mechanical overflow valve, so that the opening degree of the electronic control pressure release valve can be actively adjusted, and the oil return flow and the inlet pressure in front of the oil mass metering unit are flexibly controlled.