| 摘要 |
<p>PROBLEM TO BE SOLVED: To know a replacement time of a ring type high pressure seal in a very high pressure plunger pump without disassembling a manifold and or a seal case. SOLUTION: A plurality of ring type high pressure seals 58 are arranged in the axial direction, and their inner circumference sides are brought into slide contact with the circumference part of a plunger 48. A compression coil spring 64 presses the high pressure seals 58 toward a spacer 56 via a seal presser 60. A needle 82 is passed through the inside of a seal case 34 freely displaceably in the moving direction of the seal presser 60, and the tip of a needle part 83 is brought into contact with a flange part 86 in the seal presser 60. According to progress of abrasion in the ring type high pressure seals 58, the seal presser 60 pushes the needle 82 away, and the flange part 84 is pushed out from a crank case 16 side end face, so that a replacement time for the ring type high pressure seals 58 can be known from the quantity of the pushed out flange part 84.</p> |
