Double-acting reciprocating booster pump

Abstract

The invention provides a double-acting reciprocating booster pump and belongs to the technical field of reciprocating pumps. The double-acting reciprocating booster pump is composed of a double-step plunger piston and a pump body. A left volume cavity and a right volume cavity are arranged on the pump body, a suction valve assembly I and a discharge valve assembly I are installed in the left volume cavity, and a suction valve assembly II and a discharge valve assembly II are installed in the right volume cavity. The double-step plunger piston and a sealing assembly of the double-step plunger piston are installed between the left volume cavity and the right volume cavity and separate the left volume cavity and the right volume cavity. The double-acting reciprocating booster pump is novel in structural design, has two flow discharging strokes in one reciprocating motion stroke of the double-step plunger piston and increases discharge flows in a multiplied mode. In addition, stress on two sides of the double-step plunger piston in the suction and discharge strokes are the same. The double-acting reciprocating booster pump always provides same acting force for a power end and solves the problem that the stress of a conventional booster pump in the suction and discharge strokes are uneven.

Description

technical field [0001] The invention belongs to the technical field of reciprocating pumps, and in particular relates to a double-acting reciprocating booster pump. Background technique [0002] The reciprocating booster pump is a traditional machine that pressurizes the conveyed liquid medium by driving the plunger or piston to reciprocate. The conveyed medium has a certain inlet pressure. [0003] Usually, the reciprocating booster pump uses the area difference of the large and small plunger to balance the reaction force of a part of the inlet pressure to the power end. However, there is always a gap between the inlet pressure and discharge pressure data provided when designing the difference between the size and head of the booster pump plunger and the actual work, which always affects the normal work of the power end. The invention patent with Chinese patent number 200910059897.4 discloses an inlet pressure balanced booster water injection pump. Its main features are: ...

AI Technical Summary

Problems solved by technology

However, this structure also has the problem that the power end of the plunger is not stressed during the suction stroke (in theory), and the power end is stressed during the plunger discharge stroke, and the force is uneven.

The most important thing is that this structure is related to the area difference between the pump discharge flow and the stepped plunger. When the discharge flow required by the pump is relatively large, this structure is difficult to realize.

Because: (1) The diameter of the small head of the stepped plunger cannot be too small, the strength of the plunger is not enough if the diameter is too small, and the processing difficulty is also very difficult (slender rod) and the machining accuracy is difficult to guarantee; (2) The large head of the stepped plunger The diameter should not be too large. If the diameter of the big head is simply increased, then for multi-cylinder pumps, the distance between the cylinders of the pump will be very large, and the distance between the cylinders of the matching power end will also be large. Generally speaking, the power end with large cylinder distance will carry The capacity is also large, and the power end capacity will be rich, resulting in the waste of large horse-drawn carts

Since the large end of the stepped plunger cannot be too large and the small end cannot be too small, the scope of application of this patented technology is limited

Images