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1. 发明申请

US20030221412A1 Dual chamber pump and method 有权
标题翻译：双室泵和方法
公开(公告)号：US20030221412A1
公开(公告)日：2003-12-04
申请号：US10404036
申请日：2003-03-31
发明人： Steven M. Harrington
IPC分类号： F02K009/46
CPC分类号： F04F1/06 , F02K9/46 , F23K2301/201 , F23N2035/30
摘要： Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for pumping water, such as for fire suppression. During operation of the pump, liquid is drained from a tank into a pump chamber and the chamber is then pressurized to deliver fluid. The chamber is then refilled from the main tank. An auxiliary chamber supplies fuel while the main chamber is being filled, thereby a steady stream is delivered from the pump. The auxiliary chamber is refilled from the tank while the main chamber is delivering fluid. The design results in substantial weight savings over a system in which the main tank is pressurized or a system with two pump chambers of similar size. The auxiliary chamber of the present disclosure has a smaller capacity than the main chamber. The main chamber is designed to be filled much faster than it is emptied, therefore the smaller auxiliary chamber supplies fluid only during the time while the larger main chamber is being filled.
摘要翻译：公开了一种气动高压轻质流体泵。该泵可用于泵送液体火箭发动机的燃料和泵送水，例如用于灭火。在泵运行期间，液体从罐中排出到泵室中，然后将室加压以输送流体。然后将腔室从主容器中重新填充。辅助室在主室被填充时供应燃料，从而从泵输送稳定的流。当主室输送流体时，辅助室从罐中重新填充。该设计比主油箱加压的系统或具有两个类似尺寸的泵室的系统节省了大量的重量。本公开的辅助室具有比主室更小的容量。主室的设计要比排空更快，因此较小的辅助室仅在更大的主室正在填充的时间内供应流体。

2. 发明申请

US20030014965A1 System for reducing pump cavitation 失效
标题翻译：减少泵气蚀的系统
公开(公告)号：US20030014965A1
公开(公告)日：2003-01-23
申请号：US10196055
申请日：2002-07-17
申请人： National Aerospace Laboratory of Japan
发明人： Tomoyuki Hashimoto , Mitsuo Watanabe , Takeshi Kanda , Satoshi Hasegawa , Kenji Kudo , Athuo Murakami , Kouichiro Tani
IPC分类号： F02K009/46
CPC分类号： F04D29/669 , F02K9/46
摘要： The occurrence of cavitation is reduced in a rotary pump while the pump performance is maintained. A low-temperature source present in the pump system is utilized, and heat exchange with the fluid flowing to the pump is performed with this low-temperature source, thereby lowering the temperature of the fluid flowing into the pump and lowering the saturated vapor pressure of this fluid, which increases the allowable margin for a decrease in the pressure of the fluid and reduces the occurrence of cavitation. In the case of a liquid rocket engine, a coolant or another propellant B whose temperature is lower than that of the primary propellant A can be employed as this low-temperature source. The propellant B is passed through a heat exchanger 2 by a pump 4, which results in heat exchange with the propellant A from a tank 3, and lowers the fluid temperature. Since the fluid velocity of the propellant A is low at the time of this inflow, there is only slight pressure loss inside the heat exchanger 2. As a result, the temperature of the propellant A is lowered and the occurrence of cavitation is reduced within the pump 1.
摘要翻译：在保持泵性能的同时，在旋转泵中减少气穴的发生。使用存在于泵系统中的低温源，并且与该低温源一起进行与流入泵的流体的热交换，从而降低流入泵中的流体的温度并降低饱和蒸气压这种流体增加了流体压力降低的允许余量并减少了空化现象。在液体火箭发动机的情况下，可以使用温度低于主推进剂A的冷却剂或另一推进剂B作为该低温源。推进剂B通过泵4通过热交换器2，这导致从罐3与推进剂A的热交换，并降低流体温度。由于推进剂A的流体速度在该流入时为低，所以在热交换器2的内部仅存在轻微的压力损失。结果，推进剂A的温度降低，并且空气的发生在泵1。

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