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公开(公告)号：US4705103A
公开(公告)日：1987-11-10
申请号：US881436
申请日：1986-07-02
CPC分类号： F28F1/40
摘要： An enhanced heat-transfer tube for use in a condenser of a refrigeration system, in which fine grooves having a depth equal to or less than 0.0012 inches, when the refrigerant has a mass velocity equal to or greater than 200,000 lb.sub.m /hr-ft.sup.2, improves the average heat-transfer coefficient.
摘要翻译： 一种用于制冷系统的冷凝器的增强型传热管，其中当制冷剂具有等于或大于200,000lbm / hr-ft2的质量速度时，具有等于或小于0.0012英寸的深度的细槽， 提高平均传热系数。
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公开(公告)号：US4502848A
公开(公告)日：1985-03-05
申请号：US427652
申请日：1982-09-29
CPC分类号： F04B9/1315 , F04B35/002
摘要： A vacuum pump assembly which is driven by pulsating exhaust gases emanating from an internal combustion engine is disclosed. The pump assembly includes a double-acting pump means for pumping air from a vacuum source and having a reciprocable pumping member, an actuating means including a reciprocable actuating member drivingly connected to the pumping member and which is driven through first and second strokes to move the pumping member through first and second strokes, respectively, one side of the actuating member being in communication with the exhaust gases and with the actuating and pumping members being movable through their first strokes during the pressure increasing phase of each pressure pulsation and being moved through their second strokes by a nonlinear variable rate air spring means during each pressure decreasing phase of each pressure pulsation. The air spring means is in communication with the atmosphere via bleed hole means and with the latter being uncovered during low engine speeds and loads, being covered and uncovered by the reciprocating actuating member during intermediate engine speeds and loads and being covered during high engine speeds and loads whereby the pump assembly is operable to pump air from the vacuum source throughout a wide range of engine speeds and loads including high speeds and loads.
摘要翻译： 公开了一种由内燃机产生的脉动废气驱动的真空泵组件。 泵组件包括用于从真空源泵送空气并具有可往复运动的泵构件的双作用泵装置，致动装置包括驱动地连接到泵送构件的可往复运动的致动构件，并且通过第一和第二冲程来驱动空气 分别通过第一和第二冲程泵送构件，致动构件的一侧与废气连通，并且致动和泵送构件可在每个压力脉动的增压阶段期间通过其第一冲程移动并且通过其移动通过它们 在每个压力脉动的每个减压阶段期间通过非线性可变速率空气弹簧装置进行第二次冲程。 空气弹簧装置通过放气孔装置与大气连通，并且在低发动机速度和负载期间，空气弹簧装置与大气连通，在中间发动机转速和负载期间被往复致动构件覆盖和未覆盖并且在高发动机转速期间被覆盖， 负载，由此泵组件可操作以在包括高速度和负载的发动机速度和负载的宽范围内从真空源泵送空气。
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公开(公告)号：US4995252A
公开(公告)日：1991-02-26
申请号：US319363
申请日：1989-03-06
IPC分类号： B21D17/00 , B21B13/10 , B21B15/00 , B21B17/08 , B21B23/00 , B21C37/20 , B21D53/06 , B21H7/18
CPC分类号： B21B23/00 , B21B17/08 , B21C37/202 , B21C37/207 , B21H7/187 , B21B13/103 , B21B2015/0028
摘要： A method and machine for forming internal enhancement ribs in heat exchanger pipe or tubing comprises a mandrel which is supported within the tubing and a plurality of opposed rotary dies which have their axes perpendicular to the tube axis so that they rotate in the direction parallel to the tube axis. The rotary dies have a circumferential contact portion that has a concave arcuate profile. In one embodiment, the circumferential surface is scalloped with a succession of axially raised portions. In another embodiment, the rotary die carries a plurality of circumferential rollers.
摘要翻译： 一种用于在热交换器管或管中形成内部增强肋的方法和机器包括支撑在管道内的心轴和多个相对的旋转模具，其轴线垂直于管轴线，使得它们沿平行于 管轴。 旋转模具具有凹形弧形轮廓的周向接触部分。 在一个实施例中，圆周表面被扇形地带有一系列轴向凸起部分。 在另一个实施例中，旋转模具承载多个周向辊。
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公开(公告)号：US4502847A
公开(公告)日：1985-03-05
申请号：US427651
申请日：1982-09-29
CPC分类号： F04B35/002 , F04B9/1315
摘要： A vacuum pump assembly which is driven by pulsating exhaust gases emanating from an internal combustion engine is disclosed. The pump assembly includes a staged pump means for pumping air from a vacuum source and having a reciprocable pumping member, an actuating means including a reciprocable actuating member drivingly connected to the pumping member and which is driven through first and second strokes to move the pumping member through first and second strokes, respectively, one side of the actuating member being in communication with the exhaust gases and with the actuating and pumping members being movable through their first strokes during the pressure increasing phase of each pressure pulsation and being moved through their second strokes by a nonlinear variable rate spring means during each pressure decreasing phase of each pressure pulsation whereby the pump assembly is operable to pump air from the vacuum source throughout a wide range of engine speeds and loads including high speeds and loads.
摘要翻译： 公开了一种由内燃机产生的脉动废气驱动的真空泵组件。 泵组件包括用于从真空源泵送空气并具有可往复运动的泵构件的分段泵装置，致动装置包括驱动地连接到泵送构件的可往复运动的致动构件，并且通过第一和第二冲程来驱动泵送构件 通过第一和第二冲程，致动构件的一侧与废气连通，并且致动和泵送构件可在每个压力脉动的增压阶段期间通过其第一冲程移动并且通过其第二冲程移动 通过非线性可变速率弹簧装置在每个压力脉动的每个减压阶段期间，由此泵组件可操作以在包括高速度和负载的整个发动机速度和负载的宽范围内从真空源泵送空气。
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公开(公告)号：US4479765A
公开(公告)日：1984-10-30
申请号：US427650
申请日：1982-09-29
IPC分类号： F01N5/00 , F01N5/04 , F02B37/00 , F02B75/02 , F04B9/08 , F04B9/127 , F04B35/00 , F04B35/01 , F04B43/067
CPC分类号： F04B9/127 , F01N5/04 , F02B37/00 , F04B35/002 , F02B2075/027 , Y02T10/144 , Y02T10/16
摘要： A vacuum pump assembly which is driven by pulsating exhaust gases emanating from an internal combustion engine is disclosed. The pump assembly includes a double-acting pump means for pumping air from a vacuum source and having a reciprocable pumping member, an actuating means including a reciprocable actuating member drivingly connected to the pumping member and which is driven through first and second strokes to move the pumping member through first and second strokes, respectively, one side of the actuating member being in communication with the exhaust gases and with the actuating and pumping members being movable through their first strokes during the pressure increasing phase of each pressure pulsation and being moved through their second strokes by a first nonlinear variable rate spring means during each pressure decreasing phase of each pressure pulsation during low to intermediate engine speeds and loads and by both the first and a second nonlinear variable rate spring means during intermediate to high engine speeds and loads whereby the pump assembly is operable to pump air from the vacuum source throughout a wide range of engine speeds and loads including high speeds and loads.
摘要翻译： 公开了一种由内燃机产生的脉动废气驱动的真空泵组件。 泵组件包括用于从真空源泵送空气并具有可往复运动的泵构件的双作用泵装置，致动装置包括驱动地连接到泵送构件的可往复运动的致动构件，并且通过第一和第二冲程来驱动空气 分别通过第一和第二冲程泵送构件，致动构件的一侧与废气连通，并且致动和泵送构件可在每个压力脉动的增压阶段期间通过其第一冲程移动并且通过其移动通过它们 通过第一非线性可变速率弹簧的第二冲程是指在低至中间发动机速度和负载期间的每个压力脉动的每个压力降低阶段期间，以及在中等至高发动机转速和负载期间的第一和第二非线性可变速率弹簧装置， 泵组件可操作以从真空源泵送空气 在各种各样的发动机速度和负载，包括高速度和负载。
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