Quantitative pump

Defining a quantitative pump is a pump that does not change the theoretical displacement per revolution.

Purpose The quantitative pump is used in the magnesium alloy melting/heating furnace, and the magnesium alloy liquid can be quantitatively used for die casting.

Features 1. The self-designed fixed pump rotor can provide the customer with the required liquid supply capacity.

2. The unique positive pressure structure makes the melt flow more stable.

3, customized according to customer requirements, with the brand model of die-casting equipment.

Relevant Differences In the condition of constant speed, the variable output pump is a variable displacement pump, and vice versa is a fixed displacement pump. Their biggest difference is that the axis of the variable pump is a comfortable installation. Simply speaking, after the pump's speed is selected, its flow and pressure are determined and cannot be adjusted. The output flow of the variable pump can automatically adjust the flow according to the pressure change of the system (the size of the external load), that is, the output flow is small when the pressure is high, and the output flow is large when the pressure is low, so that he can save the number of hydraulic components, thereby simplifying Oil system, and can reduce oil heating. The disadvantages are that the flow pulsation is serious, the system pressure is not steady, the pump life is short, and the pump bearing is easily damaged because he is comfortable to install, and the pump is loud.

The vane pump can realize the variable by adjusting the eccentricity and the plunger pump adjusting the skateboard angle.

The differential quantitative pump relates to the quantitative pump technology field, in particular to a differential quantitative pump, including a PLC control device, a pressure fluid line and a control device thereof, and a pump body and a feed side feeding end cap of a pump body. The discharge side end cap of the discharge side of the pump body, the active piston connected with the feed side end cap of the pump body, the differential sleeve against the active piston, and the feed material connected with this active piston. The port and the discharge port are composed of lateral connecting rods connecting the feed side end cap and the discharge side end cap. The active piston has two sealing rings. There are two seal rings inside and outside the differential sleeve. A lateral connecting rod passes through the differential sleeve and is connected to the active piston via bolts. The feed side end cap and the discharge side end cap are connected to the pump body by bolts. The active piston is connected with the electromagnetic pneumatic valve of the control device through the pipeline, and the electromagnetic pneumatic valve is connected with the PLC control device. A quantitative pump with few components, simple mechanism, low failure rate, convenient maintenance, and low cost is provided.

Diaphragm-based quantitative pump working principle and common troubleshooting methods (1) the use of the diaphragm before and after the action of the diaphragm and the pump head changes caused by the ball valve moves up and down to form a vacuum adsorption and pushing the phenomenon of liquid delivery purposes.

1 When the diaphragm pulls back, the outlet ball valve falls tightly to the ball seat, and the inlet ball valve floats upwards due to the vacuum generated between the diaphragm and the pump head, and the liquid is sucked up.

2 When the diaphragm is pushed forward, the inlet ball valve and the ball seat are airtight so that the liquid does not pass through, and the outlet is pushed forward by the diaphragm to open the ball valve. The liquid discharges (2) from the above principle of action. We can simply Knowing that any leak caused by diaphragm, pump head, or ball valve ball seat cannot achieve the purpose of delivery, or the flow rate is abnormal. Usually, the four main components of this failure are:

1 ball seat and ball valve can not be airtight 2 inlet and outlet foreign matter obstruction 3 diaphragm damage, so if the liquid delivery is abnormal, in this regard, should be solved, and what caused the above factors, too numerous to mention, according to the time Pipes, fittings and operating conditions can be determined.