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公开(公告)号：US20080038137A1
公开(公告)日：2008-02-14
申请号：US11891531
申请日：2007-08-09
IPC分类号： F04C15/00
CPC分类号： F04C18/16 , F01C21/108 , F04C18/084 , F04C25/02 , F04C29/12
摘要： A screw pump includes a housing and a pair of intermeshing screw rotors. An end face of the rotor adjacent to an inlet port of the housing is provided with an inlet opening. Each rotor has a first portion whose lead angle changes. The first portions and the housing cooperate to form an inlet space. During rotation of the rotors, communication between the inlet space and the inlet port is blocked by the first portions and the housing thereby to form a closed pump space adjacent to the inlet space. Volume of the pump space is set smaller than the maximum volume of the inlet space. A closure member is provided which covers at least a part of the inlet openings. The closure member closes the inlet space when the volume of the inlet space exceeds that of the pump space.
摘要翻译： 螺杆泵包括壳体和一对相互啮合的螺杆转子。 与壳体的入口相邻的转子的端面设置有入口开口。 每个转子具有引导角改变的第一部分。 第一部分和壳体协作形成入口空间。 在转子旋转期间，入口空间和入口之间的连通被第一部分和壳体阻挡，从而在入口空间附近形成封闭的泵空间。 泵空间的容积设定为小于入口空间的最大体积。 提供封闭构件，其覆盖入口开口的至少一部分。 当入口空间的体积超过泵的空间时，封闭构件封闭入口空间。
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公开(公告)号：US20070098585A1
公开(公告)日：2007-05-03
申请号：US11591077
申请日：2006-10-31
CPC分类号： F04C29/023 , F04C2/102 , F04C18/16 , F04C29/025 , F04C2220/12 , F04C2240/51 , F04D29/059 , F04D29/063 , F16C33/6674 , F16C2360/42 , F16C2360/43
摘要： A vacuum pump includes a housing assembly having an oil-reservoir chamber in which a lubricating oil is stored; a pair of screw rotors disposed in the housing assembly and engaged with each other; a pair of rotary shafts connected to the rotors, respectively; a plurality of bearings supporting each of the rotary shafts and having an opening; an oil-feed pump for feeding the lubricating oil from the oil-reservoir chamber to the bearing; an oil-circulation passage provided for circulating the lubricating oil from the oil-feed pump to the oil-reservoir chamber through the bearing; a cover provided at the opening of the bearing to close the opening of the bearing with a clearance remained, the cover permitting the lubricating oil to enter the bearing through the clearance; and an oil-escape passage provided adjacent to the bearing for returning to the oil-reservoir chamber the lubricating oil not entering the bearing.
摘要翻译： 真空泵包括壳体组件，其具有存储润滑油的储油室; 一对螺旋转子，其设置在所述壳体组件中并彼此接合; 分别连接到转子的一对旋转轴; 多个轴承，其支撑每个旋转轴并具有开口; 用于将润滑油从储油室供给到轴承的给油泵; 油循环通道，用于使润滑油从供油泵通过轴承循环到储油室; 设置在轴承的开口处的盖子保留了间隙以关闭轴承的开口，盖子允许润滑油通过间隙进入轴承; 以及与所述轴承相邻设置的用于使所述润滑油不进入所述轴承的油回流通道。
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公开(公告)号：US20100233006A1
公开(公告)日：2010-09-16
申请号：US12159186
申请日：2006-12-26
IPC分类号： F01C1/18
CPC分类号： F04C29/025 , F04C18/16 , F04C29/023 , F04C29/04 , F04C2220/10
摘要： A vacuum pump includes rotary shafts connected to a pair of screw-type rotors, respectively, and a pair of shaft retainers extending in the housing. Each shaft retainer supports the corresponding rotary shaft by means of a proximal bearing portion and a distal bearing portion. Each pair of the proximal and distal bearing portions are fixed in the axial direction with respect to the corresponding rotary shaft and shaft retainer. Lubricant oil is stored in an oil storage space in a gear case attached to the housing. A cooling water passage through which cooling water to cool the lubricant oil passes is formed in the gear case. A controller controls the flow rate of the cooling fluid, so that the temperature of the lubricant oil in the oil storage space is kept constant. With this configuration, when the bearing portions are fixed in the axial direction with respect to the rotary shafts and the shaft retainers, it is possible to prevent load from being applied to the bearing portions in the axial direction.
摘要翻译： 真空泵包括分别连接到一对螺杆式转子的旋转轴和在壳体中延伸的一对轴保持器。 每个轴保持器通过近侧轴承部分和远侧轴承部分支撑相应的旋转轴。 每对近端和远端轴承部分相对于相应的旋转轴和轴保持器沿轴向固定。 润滑油储存在附接到壳体的齿轮箱中的储油空间中。 在齿轮箱中形成有用于冷却润滑油的冷却水通过的冷却水通道。 控制器控制冷却流体的流量，使得储油空间中的润滑油的温度保持恒定。 利用这种构造，当轴承部分相对于旋转轴和轴保持器沿轴向方向固定时，可以防止在轴向方向上对轴承部分施加负载。
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公开(公告)号：US07458790B2
公开(公告)日：2008-12-02
申请号：US11591077
申请日：2006-10-31
CPC分类号： F04C29/023 , F04C2/102 , F04C18/16 , F04C29/025 , F04C2220/12 , F04C2240/51 , F04D29/059 , F04D29/063 , F16C33/6674 , F16C2360/42 , F16C2360/43
摘要： A vacuum pump includes a housing assembly having an oil-reservoir chamber in which a lubricating oil is stored; a pair of screw rotors disposed in the housing assembly and engaged with each other; a pair of rotary shafts connected to the rotors, respectively; a plurality of bearings supporting each of the rotary shafts and having an opening; an oil-feed pump for feeding the lubricating oil from the oil-reservoir chamber to the bearing; an oil-circulation passage provided for circulating the lubricating oil from the oil-feed pump to the oil-reservoir chamber through the bearing; a cover provided at the opening of the bearing to close the opening of the bearing with a clearance remained, the cover permitting the lubricating oil to enter the bearing through the clearance; and an oil-escape passage provided adjacent to the bearing for returning to the oil-reservoir chamber the lubricating oil not entering the bearing.
摘要翻译： 真空泵包括壳体组件，其具有存储润滑油的储油室; 一对螺旋转子，其设置在所述壳体组件中并彼此接合; 分别连接到转子的一对旋转轴; 多个轴承，其支撑每个旋转轴并具有开口; 用于将润滑油从储油室供给到轴承的给油泵; 油循环通道，用于使润滑油从供油泵通过轴承循环到储油室; 设置在轴承的开口处的盖子保留了间隙以关闭轴承的开口，盖子允许润滑油通过间隙进入轴承; 以及与所述轴承相邻设置的用于使所述润滑油不进入所述轴承的油回流通道。
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公开(公告)号：US20120014825A1
公开(公告)日：2012-01-19
申请号：US13180873
申请日：2011-07-12
申请人： Yuya Izawa , Shinya Yamamoto , Takashi Ban , Takayuki Imai , Katsumi Yamashita , Yasunaka Hanaoka
发明人： Yuya Izawa , Shinya Yamamoto , Takashi Ban , Takayuki Imai , Katsumi Yamashita , Yasunaka Hanaoka
IPC分类号： F04C15/06
CPC分类号： F04C18/084 , F04C18/086 , F04C18/126 , F04C27/006 , F04C29/122
摘要： A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case and the pair of rotors for introducing fluid, a discharge space formed by the case for discharging fluid and the pair of rotors and a transfer chamber formed by the case and the rotor. The rotor has a rotor end surface. A clearance is formed between the side wall and the rotor end surface. The transfer chamber transfers gas introduced in the suction space to the discharge space in accordance with the rotation of the pair of rotors. The case has a guide groove formed in the side wall facing the rotor end surface. Gas leaked from the discharge space into the clearance is introduced to the transfer chamber through the guide groove.
摘要翻译： 根型流体机械包括具有侧壁的壳体，设置在壳体中的一对旋转轴，一对彼此接合并固定到一对旋转轴的转子，以分别轴向延伸到吸入空间 由壳体和用于引入流体的一对转子形成，由用于排出流体的壳体和一对转子形成的排出空间以及由壳体和转子形成的传送室。 转子具有转子端面。 在侧壁和转子端面之间形成间隙。 传送室根据一对转子的旋转将吸入空间中引入的气体传送到放电空间。 壳体具有形成在面向转子端面的侧壁中的引导槽。 从排出空间泄漏到间隙的气体通过引导槽被引入传送室。
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公开(公告)号：US08936450B2
公开(公告)日：2015-01-20
申请号：US13180873
申请日：2011-07-12
申请人： Yuya Izawa , Shinya Yamamoto , Takashi Ban , Takayuki Imai , Katsumi Yamashita , Yasunaka Hanaoka
发明人： Yuya Izawa , Shinya Yamamoto , Takashi Ban , Takayuki Imai , Katsumi Yamashita , Yasunaka Hanaoka
CPC分类号： F04C18/084 , F04C18/086 , F04C18/126 , F04C27/006 , F04C29/122
摘要： A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case and the pair of rotors for introducing fluid, a discharge space formed by the case for discharging fluid and the pair of rotors and a transfer chamber formed by the case and the rotor. The rotor has a rotor end surface. A clearance is formed between the side wall and the rotor end surface. The transfer chamber transfers gas introduced in the suction space to the discharge space in accordance with the rotation of the pair of rotors. The case has a guide groove formed in the side wall facing the rotor end surface. Gas leaked from the discharge space into the clearance is introduced to the transfer chamber through the guide groove.
摘要翻译： 根型流体机械包括具有侧壁的壳体，设置在壳体中的一对旋转轴，一对彼此接合并固定到一对旋转轴的转子，以分别轴向延伸到吸入空间 由壳体和用于引入流体的一对转子形成，由用于排出流体的壳体和一对转子形成的排出空间以及由壳体和转子形成的传送室。 转子具有转子端面。 在侧壁和转子端面之间形成间隙。 传送室根据一对转子的旋转将吸入空间中引入的气体传送到放电空间。 壳体具有形成在面向转子端面的侧壁中的引导槽。 从排出空间泄漏到间隙的气体通过引导槽被引入传送室。
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