公开(公告)号：WO2020258076A1

公开(公告)日：2020-12-30

申请号：PCT/CN2019/093010

申请日：2019-06-26

Applicant: GRACO MINNESOTA INC.

Inventor： SONG, Xiaochuang ,  WU, Jibao ,  YOU, Zaixing ,  TIAN, Jin

IPC: F16N39/04 ,  F16N13/20 ,  F16N13/00

Abstract: A lubricant pump (14) and a method thereof are disclosed. The lubricant pump (14) includes a pump base (32) and a reservoir housing (30). The pump base (32) and the reservoir housing (30) define a lubricant reservoir for storing lubricant. One or more pump elements (34) extend at least partially into the lubricant reservoir. Heaters (36) are disposed on the pump base (32) proximate the pump elements (34). The heaters (36) are configured to heat the local area surrounding the pump elements (34), to thereby reduce the viscosity of the lubricant at the pump elements (34). The heaters (36) are electrically connected to a thermal switch (38) to control activation and deactivation of the heaters (36). With the lubricant pump (14) and the method thereof, the thermal switch (38) can control the heater (36) based on air temperature rather than the temperature of the lubricant, so the viscosity of lubricant is well controlled.

公开(公告)号：WO2018000323A1

公开(公告)日：2018-01-04

申请号：PCT/CN2016/087888

申请日：2016-06-30

Applicant: GRACO MINNESOTA INC. ,  WU, Xueshui

Inventor： WU, Xueshui ,  YOU, Zaixing ,  WU, Jibao

IPC: F04B53/14 ,  F16N13/16

Abstract: A piston for a single-stroke pump (20) includes a pump rod(68), a seal ring (70) extending around the pump rod (68) and having a central bore (88), and a retaining device (72) disposed on the pump rod (68) and retaining the seal ring (70) on the pump rod(68). In a forward stroke, the seal ring (70) is in a first position whereby the seal ring (70) sealingly engages the pump rod (68) such that the seal ring (70) and the pump rod (68) drive a fluid out of a pump chamber (50). When transitioning to a return stroke, the seal ring (70) is maintained still relative to a pump cylinder (30) until the retaining device (72) engages the seal ring (70), such that the seal ring (70) is in a second position. With the seal ring (70) in the second position, a flow path is opened between the seal ring (70) and the pump rod (68), allowing fluid to flow into the pump chamber (50) to prime the pump with the next pump cycle.

Abstract translation: 用于单冲程泵（20）的活塞包括泵杆（68），围绕泵杆（68）延伸并具有中心孔（88）的密封环（70） 和设置在泵杆（68）上并将密封环（70）保持在泵杆（68）上的保持装置（72）。 在向前行程中，密封环（70）处于第一位置，由此密封环（70）密封地接合泵杆（68），使得密封环（70）和泵杆（68）驱动流体流出 的泵室（50）。 当转换到返回行程时，密封环（70）相对于泵缸（30）保持静止直到保持装置（72）接合密封环（70），使得密封环（70）处于 第二位。 在密封环（70）处于第二位置的情况下，在密封环（70）和泵杆（68）之间打开流动路径，允许流体流入泵室（50）中，以便为下一个泵 泵循环。