Plunger-slipper assembly of high-pressure pump

Abstract

A plunger-slipper assembly of a high-pressure pump is herein claimed. The plunger-slipper assembly comprises a plunger and a slipper. The plunger has a first end and a second end, which are both spherical ends. The slipper comprises a coaxial hole for receiving the plunger and the coaxial hole has a spherical space formed at the extremity thereof for accommodating the second end of the plunger. The first end of the plunger juts out from the slipper. Further, the diameter of the coaxial hole of the slipper is slightly larger than the diameter of the plunger. An oil-filling channel lengthwise penetrates the plunger through the first end to the second end thereof. An oil-guiding channel radially penetrates the wall of the slipper and connects with the extremity of the coaxial hole. A first annular groove is deposited at the outer wall of the slipper. A third annular groove is also deposited surrounding the outer wall of the slipper. An annular stuff is settled in the third annular groove. The disclosed plunger-slipper structure operates in a high-pressure pump to provide a relatively larger stroke and to retard the abrasion thereof.

1 . A plunger-slipper assembly of a high-pressure pump, comprising
 a plunger having a first end and a second end, which are both spherical ends;   a slipper comprising a coaxial hole for receiving the plunger wherein the coaxial hole has a spherical space formed at the extremity thereof for accommodating the second end of the plunger and the first end of the plunger juts out from the slipper while the diameter of the coaxial hole of the slipper is slightly larger than the diameter of the plunger;   an oil-filling channel lengthwise penetrating the plunger through the first end to the second end thereof;   an oil-guiding channel radially penetrating the wall of the slipper and connecting with the extremity of the coaxial hole;   a first annular groove deposited at the identical peripheral position of the outer wall of the slipper where the oil-guiding channel is settled;   a third annular groove also deposited surrounding the outer wall of the slipper and is separated from the first annular groove with a predetermined distance wherein location of the third annular groove is near the second end of the plunger; an intrusive flange formed at the inner periphery of the coaxial hole corresponding to the third annular groove, wherein the flange touches the second end of the plunger at a proper position so as to axially retain the plunger; and   an annular stuff is settled in the third annular groove.   
   
   
       2 . The plunger-slipper assembly of  claim 1 , wherein a second annular groove is provided between the first annular groove and the third annular groove.