The development of hydraulic pumps is developing in the direction of high pressure and high speed, and at the same time, higher demands are put forward for the leakage of hydraulic pumps. There are two main forms of static seal and dynamic seal to prevent hydraulic oil leakage, which are used to block or reduce the leakage of hydraulic oil in the hydraulic pump chamber to the pump cavity, and at the same time prevent external dust and foreign matter from entering the pump chamber.
Generally speaking, the static seal of the hydraulic pump may reach the ideal situation of zero leakage after legal planning, but for the dynamic seal due to any relative displacement of the contact surface, Tuyi creates conditions for leakage on the joint surface, so it is difficult to achieve zero leakage. As an important purpose, the external leakage of the hydraulic pump is often begged that the static seal is not allowed to leak, and the dynamic seal gives the leakage purpose per unit time. As a form of dynamic seal, mechanical seal has the following advantages: low leakage, small material consumption, reliable utilization; Low friction power consumption; Long service life; Wide range of utilization, can be applied to low speed, high temperature, high temperature high pressure and other working conditions.
