Method for producing a galvanized steel sheet
    5.
    发明申请
    Method for producing a galvanized steel sheet 审中-公开
    镀锌钢板的制造方法

    公开(公告)号:US20110192504A1

    公开(公告)日:2011-08-11

    申请号:US12927331

    申请日:2010-11-12

    Abstract: A method for producing a galvanized steel sheet including (a) melting a steel having a steel composition comprising 0.005 to 0.04 mass % C, 1.5 mass % or lower Si, 1.0 to 2.0 mass % Mn, 0.10 mass % or lower P, 0.03 mass % or lower S, 0.01 to 0.1 mass % Al, less than 0.008 mass % N and 0.2 to 1.0 mass % Cr, wherein Mn (mass %)+1.29 Cr (mass %) is 2.1 to 2.8, and the balance being iron and unavoidable impurities, (b) hot rolling and cold rolling the steel from step (a) to provide a steel sheet, and (c) annealing the steel sheet from step (c) at an annealing temperature of at least the Ac1 point and not more than the Ac3 point, wherein the galvanized steel sheet has a structure which includes a ferrite phase and a martensite phase with a volume fraction being at least 3.0% and less than 10%, the average particle diameter of the ferrite is larger than 6 μm and not more than 15 μm, and 90% or more of the martensite phase exists in a ferrite grain boundary.

    Abstract translation: 一种镀锌钢板的制造方法,其特征在于,具有(a)将钢组成为含有0.005〜0.04质量%的C,1.5质量%以下的Si,1.0〜2.0质量%的Mn,0.10质量%以下的P,0.03质量% %以下S,0.01〜0.1质量%Al,小于0.008质量%N和0.2〜1.0质量%Cr,其中,Mn(质量%)+ 1.29Cr(质量%)为2.1〜2.8,余量为铁和 不可避免的杂质,(b)对步骤(a)中的钢进行热轧和冷轧以提供钢板,(c)在至少Ac1点的退火温度下退火步骤(c)的钢板,而不是更多 其中镀锌钢板具有铁素体相和马氏体相的结构,其体积分数为3.0%以上且小于10%,铁素体的平均粒径大于6μm, 不大于15μm,在铁素体晶界中存在90%以上的马氏体相。

    Rotor shaft sealing method and structure of oil-free rotary compressor
    7.
    发明授权
    Rotor shaft sealing method and structure of oil-free rotary compressor 有权
    无油旋转压缩机转子轴密封方法及结构

    公开(公告)号:US07713040B2

    公开(公告)日:2010-05-11

    申请号:US12058831

    申请日:2008-03-31

    CPC classification number: F04C23/001 F04C18/123 F04C27/009 F04C2220/12

    Abstract: A rotor shaft sealing method for an oil-free rotary compressor is provided, with which occurrence of lubrication oil intrusion into the compression chamber of the compressor which is liable to occur when negative pressure is produced in the compression chamber, is prevented. With a rotor shaft sealing structure composed such that two shaft seal means are provided in the rotor casing between the oil lubricated bearing and the compression chamber such that an annular airspace is formed between the two shaft seal means, at least one communicating hole is provided to communicate the annular airspace to the outside of the rotor casing, and the annular airspace of the male rotor shaft sealing part and the annular airspace of the female rotor shaft sealing part are connected by a between-rotor shaft communication passage, pressurized air is supplied to the annular airspaces by which lubrication oil intrusion into the compression chamber is prevented.

    Abstract translation: 提供一种无油旋转式压缩机的转子轴密封方法,防止了在压缩室中产生负压时容易发生压缩机压缩室的润滑油的发生。 利用转子轴密封结构,使得在油润滑轴承和压缩室之间的转子壳体中设置两个轴密封装置,使得在两个轴密封装置之间形成环形空间,至少一个连通孔被设置成 将环形空域连通到转子壳体的外部,阳转子轴密封部分的环形空间和阴转子轴密封部分的环形空间通过转子间轴连通通道连接,加压空气供应到 防止润滑油侵入压缩室的环形空间。

    ROTOR SHAFT SEALING METHOD AND STRUCTURE OF OIL-FREE ROTARY COMPRESSOR
    8.
    发明申请
    ROTOR SHAFT SEALING METHOD AND STRUCTURE OF OIL-FREE ROTARY COMPRESSOR 有权
    无油旋转压缩机的转子轴封密封方法和结构

    公开(公告)号:US20080240965A1

    公开(公告)日:2008-10-02

    申请号:US12058831

    申请日:2008-03-31

    CPC classification number: F04C23/001 F04C18/123 F04C27/009 F04C2220/12

    Abstract: A rotor shaft sealing method for an oil-free rotary compressor is provided, with which occurrence of lubrication oil intrusion into the compression chamber of the compressor which is liable to occur when negative pressure is produced in the compression chamber, is prevented. With a rotor shaft sealing structure composed such that two shaft seal means (20,31) are provided in the rotor casing (1) between the oil lubricated bearing (10, 10′) and the compression chamber (9) such that an annular airspace (24) is formed between the two shaft seal means (20,31), at least one communicating hole (34,34′) is provided to communicate the annular airspace (24) to the outside of the rotor casing (1), and the annular airspace (24) of the male rotor shaft (6) sealing part and the annular airspace (24) of the female rotor shaft (7) sealing part are connected by a between-rotor shaft communication passage (35), pressurized air is supplied to the annular airspaces (24) by which lubrication oil intrusion into the compression chamber (9) is prevented.

    Abstract translation: 提供一种无油旋转式压缩机的转子轴密封方法,防止了在压缩室中产生负压时容易发生压缩机压缩室的润滑油的发生。 利用转子轴密封结构,使得在油润滑的轴承(10,10')和压缩室(9)之间的转子壳体(1)中设置两个轴密封装置(20,31),使得环形空间 (24)形成在两个轴密封装置(20,31)之间,提供至少一个连通孔(34,34')以将环形空间(24)连通到转子壳体(1)的外部,以及 阳转子轴(6)密封部分的环形空间(24)和阴转子轴(7)密封部分的环形空间(24)通过转子间轴连通通道(35)连接,加压空气 供应到环形空间(24),通过该环空间(24)防止润滑油侵入压缩室(9)。

    SHAFT SEAL DEVICE FOR OIL-FREE ROTARY COMPRESSOR
    9.
    发明申请
    SHAFT SEAL DEVICE FOR OIL-FREE ROTARY COMPRESSOR 审中-公开
    用于无油旋转压缩机的轴封装置

    公开(公告)号:US20080240964A1

    公开(公告)日:2008-10-02

    申请号:US12058852

    申请日:2008-03-31

    Abstract: A shaft seal device is provided, with which an optimum radial clearance is always maintained between the inner circumferential surface of a carbon ring and an outer circumferential surface of a rotor shaft sleeve when temperature thereof varies in operation of the oil-free rotary compressor, and gas leak through the radial clearance can be suppressed to a minimum not influenced by operation condition of the compressor and intrusion of lubricating oil into the rotor chamber is prevented. As a result, an oil-free rotary compressor can be operated to discharge clean compressed gas not contaminated with lubrication oil. The shaft seal device to be located between the rotor chamber and rotor shaft bearing with a very small radial clearance retained between the inside surface of the shaft seal device and the outer surface of the rotor shaft sleeve 75 fixed to the rotor shaft to restrict gas leak between the rotor chamber and bearing side space is constructed such that the shaft seal device consists of an outer ring 85 and a carbon ring 83 which is fitted into the outer ring 85 with such interference that the interference does not reduce to zero even when they are heated to maximum temperature in operation of the compressor, and the outer ring 85 is made of material having a thermal expansion coefficient coequal to that of the rotor shaft sleeve 75.

    Abstract translation: 提供一种轴密封装置,当在无油旋转式压缩机的运行中其温度变化时,碳环的内周面和转子轴套的外周面之间始终保持最佳径向间隙,以及 通过径向间隙的气体泄漏可以被抑制到不受压缩机的操作条件影响的最小值,并且防止润滑油侵入到转子室中。 因此,可以操作无油旋转压缩机排出未被润滑油污染的清洁的压缩气体。 位于转子室与转子轴承之间的轴密封装置具有非常小的径向间隙,保持在轴密封装置的内表面和固定到转子轴的转子轴套75的外表面之间,以限制气体泄漏 在转子室和轴承侧空间之间构造为使得轴密封装置由外环85和碳环83组成,该环83被安装到外环85中,这样的干涉即使干扰也不会降低到零,即使它们是 在压缩机的运行中被加热到最高温度,外环85由具有与转子轴套75的热膨胀系数相等的热膨胀系数的材料制成。

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