公开(公告)号：US20150159647A1

公开(公告)日：2015-06-11

申请号：US14565962

申请日：2014-12-10

Applicant: S.P.M. Flow Control, Inc.

Inventor： Mark C. Dille ,  John Marquez ,  Alexander Grams

IPC: F04B53/14 ,  F04B19/22

CPC classification number: F04B53/144 ,  Y10T29/49236

Abstract: A stay rod assembly for reciprocating pump assembly is disclosed. The reciprocating pump assembly includes a power section having a power source to reciprocate a plunger. A cylinder section has a chamber to receive the reciprocating plunger from the power section. The stay rod assembly secures the cylinder section to the power section. The stay rod assembly includes a stud and the sleeve. The stud has a first end, a second end, a middle portion extending between the first end the second end, and a shoulder between the first end and the middle portion. The sleeve surrounds the stud and has a first loading end adjacent the shoulder, and a second loading end adjacent the second end of the stud. The sleeve is configured to be pre-compressed and to pre-tension the stud for reducing cycling stresses.

Abstract translation: 公开了一种用于往复泵组件的拉杆组件。 往复泵组件包括具有使柱塞往复运动的动力源的动力部分。 气缸部分具有用于从动力部分接收往复式活塞的腔室。 拉杆组件将气缸部分固定到动力部分。 拉杆组件包括螺柱和套筒。 螺柱具有第一端部，第二端部，在第一端部和第二端部之间延伸的中间部分，以及在第一端部和中部部分之间的台肩。 套筒围绕螺柱并且具有邻近肩部的第一加载端和邻近螺柱的第二端的第二加载端。 套筒被配置为预压缩并预紧螺柱以减少循环应力。