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    • 24. 发明授权
    • High pressure pump
    • 高压泵
    • US5924853A
    • 1999-07-20
    • US833966
    • 1997-04-11
    • Amos Pacht
    • Amos Pacht
    • F04B9/107F04B9/115F04B39/10F04B53/14F04B53/16
    • F04B53/164F04B39/1046F04B53/147F05C2203/0826
    • A high pressure fluid pump 10 supplies fluids to a water blasting or cutting gun 14. The pump 10 is preferably of the in-line type, wherein both an inlet check valve 60 and a discharge check valve 62 move linearly along the axis 40 of the plunger 30 during a complete pumping cycle. A plurality of compression rods 42 are spaced circumferentially about a plunger housing 24, and press the plunger housing into sealing engagement with a suction valve seat 56, press the suction valve seat into sealing engagement with a pump discharge housing 36, press the pump discharge housing into sealing engagement with a discharge end plate 38. Seal ring 66 is provided for sealing between a front planar face 114 of the suction valve seat and a rear planar face 112 of the plunger housing. A weep path 116 extends radially outward from the seal ring 66 to release fluids which pass by the compressible seal ring. Plunger housing 24 is provided with a uniform diameter bore 106 extending axially between the plunger seal 54 and the rear planar face 112. A selected bearing material bushing 82 is provided within the plunger housing 24, and a high temperature seal ring 80 is spaced radially outward from a front portion of the bushing to prevent the bushing from becoming seized to the plunger housing. One or more rod front ends 140 may be interconnected with a corresponding compression rod 42 for attaching a support rod 46 thereto during a pump service operation. An alignment connector 28 structurally interconnects a pump rod 26 and a plunger 30, and further reduces the time and expense of pump maintenance.
    • 高压流体泵10将流体供应到喷砂或切割枪14.泵10优选为直列式,其中入口止回阀60和排放止回阀62都沿着轴线40线性运动 柱塞30在完整的泵送循环期间。 多个压缩杆42围绕柱塞壳体24周向间隔开,并且将柱塞壳体与吸入阀座56密封接合,将吸入阀座按压与泵排出壳体36密封接合,将泵排出壳体 与排出端板38密封接合。密封环66用于密封吸入阀座的前平面114和柱塞壳体的后平面112。 一路径116从密封环66径向向外延伸以释放通过可压缩密封环的流体。 柱塞壳体24设置有在柱塞密封件54和后平面112之间轴向延伸的均匀直径孔106.在柱塞壳体24内设置有选择的轴承材料衬套82,并且高温密封环80径向向外间隔开 从衬套的前部部分防止套管卡在柱塞壳体上。 一个或多个杆前端140可以与相应的压缩杆42互连,用于在泵服务操作期间将支撑杆46附接到其上。 对准连接器28在结构上互连了泵杆26和柱塞30,并且进一步减少了泵维护的时间和费用。
    • 25. 发明授权
    • Method of applying a filled in metal carbide hard facing to the rotor of
a progressing cavity pump
    • 将填充的金属碳化物硬质面朝向腔室泵的转子施加的方法
    • US5645896A
    • 1997-07-08
    • US588141
    • 1996-01-18
    • Robert A.R. Mills
    • Robert A.R. Mills
    • F04C2/107C23C4/10
    • F04C2/1075F04C2230/00F04C2230/91F05C2201/0406F05C2201/0409F05C2201/0433F05C2203/0813F05C2203/0821F05C2203/0826Y10T428/12576Y10T428/31678
    • A hardfacing for downhole progressing cavity pumps is disclosed as well as a method for producing same. The hardfacing consists of a metal carbide layer applied to the ferrous pump rotor body by way of plasma spraying and a top layer of metallic material having a lower hardness than the metal carbide. The metal carbide layer has a grainy surface with a plurality of peaks and intermediate depressions, the peaks being formed by metal carbide grains at the surface of the metal carbide layer. The thickness of the top layer is adjusted such that the depressions between the peaks of the metal carbide layer are completely filled thereby providing the rotor with a metal carbide hardfacing of significantly reduced surface roughness. In the process of the invention, the pump rotor, which may be provided with a molybdenum bonding layer, is plasma coated with the metal carbide and the resulting carbide layer is covered with the metallic material top layer. The top layer is polished either until the dimensions thereof are within the tolerances acceptable for the finished rotor or until a majority of the peaks of the carbide layer are exposed. The hardfacing significantly increases the service life of the rotor and stator of downhole progressing cavity pumps.
    • 公开了一种用于井下前进腔泵的硬化面及其制造方法。 表面硬化由通过等离子喷涂施加到铁水泵转子体上的金属碳化物层和具有比金属碳化物低的硬度的金属材料顶层组成。 金属碳化物层具有多个峰和中间凹陷的颗粒状表面,该峰由金属碳化物层表面的金属碳化物颗粒形成。 调整顶层的厚度,使得金属碳化物层的峰之间的凹陷被完全填充,从而为转子提供显着降低的表面粗糙度的金属碳化物表面硬化。 在本发明的方法中,可以设置有钼粘合层的泵转子被等离子体涂覆有金属碳化物,并且所得到的碳化物层被金属材料顶层覆盖。 抛光顶层,直到其尺寸在成品转子可接受的公差内,或直到碳化物层的大部分峰暴露。 表面硬化显着增加了井下前进腔泵的转子和定子的使用寿命。