A horizontal piston pump is a hydraulic pump that consists of several plungers (usually 3 or 6) installed side by side. A crankshaft is used to directly push the plunger to reciprocate through the connecting rod slider or the eccentric shaft to achieve suction and discharge of liquid. They also all use valve-type flow distribution devices, and most of them are quantitative pumps. The working principle of a horizontal plunger pump is similar to that of an ordinary plunger pump. It also relies on the rotation of the crankshaft to perform reciprocating motion to achieve liquid suction and discharge.

Horizontal plunger pump features:

1. The discharge pressure range used is relatively wide, and it should be made into a high-pressure pump.

2. Simple structure, easy maintenance and good economy.

3. Equipped with plunger diameter, usually 6-45mm.

4. Can be made into various types of thermal insulation pump heads.

Horizontal plunger pump structure:

The horizontal plunger pump is mainly composed of two parts: the power end and the hydraulic end, and is equipped with pulleys, check valves, safety valves, pressure stabilizers, lubrication systems, etc. The specific components are as follows: 1-sliding shoe; 2-plunger; 4-drive shaft; 6-valve plate; 7-cylinder; 8-centering spring; 9-jacket; 10-inner sleeve; 11-steel ball; 18-plunger; 21-dial; 23-shift fork; 24-pin; 25-swash plate; 26-pressure plate.

Working principle of horizontal plunger pump:

The horizontal piston pump has three pistons installed in parallel. It uses a crankshaft (the cranks of the crankshafts are 120° to each other) to drive reciprocating telescopic motion through a connecting rod to absorb and discharge oil. The emulsion pump used in the hydraulic support system of the fully mechanized mining face belongs to this type of pump.

This kind of pump has at least one plunger and at most two plungers in the process of oil discharge (or oil suction) at every working moment. Compared with single plunger pumps, the advantages of horizontal piston pumps are: large displacement with the same plunger geometric size, because there are three plungers working; in addition, the flow pulsation coefficient is greatly reduced, because the instantaneous flow curve of the horizontal piston pump is the superposition of three single-piston pump sinusoidal instantaneous flow curves with a phase angle of 120° to each other, which greatly reduces the flow pulsation.

The difference between horizontal piston pump and vertical piston pump:

Plunger pumps are divided into horizontal and vertical types. There are certain differences between them in terms of shape, material, performance, parameters, etc. After comparison, you will find that vertical plunger pumps and horizontal plunger pumps have their own advantages. Different pumps are suitable for different places:

1. Advantages of horizontal plunger pump

(1) The suction valve and drain valve are installed vertically to make the valve port sealing better and the valve base less likely to wear.

(2) The horizontal plunger valve has less crank support, and the processing of the crankshaft bush hole and slide hole in the fuselage is less difficult.

2. Advantages of vertical plunger pump

(1) The cylinder block is fixed on the top of the crankcase with screws, and both are separated to confirm that the lubricating oil in the crankcase is not contaminated by the delivery fluid.

(2) The stuffing box has a wide space above the cylinder and is easy to maintain.

(3) The unit is compact and occupies a small area.

(4) The entrances and exits are arranged on both sides of the horizontal pump body, making maintenance easy.

(5) Vertical plunger pumps can be made into five-piston, seven-piston, nine-piston and other types, with more uniform pressure and flow.

(6) The plunger of the horizontal piston pump moves horizontally, which requires high alignment, and the weight of the plunger and the connecting rod itself causes uneven stress on the sealing packing. This problem does not exist in the vertical piston pump.