A double gear pump is two gear pumps combined into one pump. There is no difference in its installation size, but it has two oil outlets and one oil suction port. Single gear pump = one oil outlet, double gear pump = two oil outlets triple gear pump = three oil outlets.
Working principle of double gear pump:
A pair of intermeshing gears and a pump cylinder separate the suction chamber from the discharge chamber. When the gear rotates, the volume between the teeth at the side of the suction chamber where the teeth disengage from each other gradually increases, the pressure decreases, and the liquid enters the space between the teeth under the action of the pressure difference. As the gear rotates, the liquid between the teeth is brought to the discharge chamber. At this time, the volume between the teeth at the side of the discharge chamber where the teeth mesh gradually decreases, and the liquid is discharged. Gear pumps are suitable for transporting lubricating liquids that do not contain solid particles, are non-corrosive, and have a large viscosity range. The flow rate of the pump can reach m3/h, and the pressure can reach 3×Pa. It is usually used as a hydraulic pump and conveys various oil products.
Duplex pumps work the same as single pumps. Its function is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, which refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. The structural forms of hydraulic pumps generally include gear pumps, vane pumps and plunger pumps.
Does the double gear pump have the same pressure on both pumps?
In a dual gear pump, there are usually two gears - an idler gear and a drive gear. The idler gear is located between the drive gear and the pump casing and rotates in the opposite direction to the drive gear. As the gears rotate, they create a vacuum on the inlet side of the pump, which draws in fluid, which is then pushed out of the pump through the outlet side.
The pressure produced by a dual gear pump may be different for the two pumps, depending on design and operating conditions. This is because the pressure generated by the pump is affected by factors such as the size and shape of the gear, the clearance between the gear and the pump casing, the viscosity and flow rate of the fluid being pumped, and the rotational speed of the gear. .
In some cases, the drive gear may be designed to be larger or have a higher number of teeth than the idler gear, resulting in higher stress on the drive gear. In addition, pressure may vary depending on the direction of flow through the pump, with higher pressures typically being generated when fluid is being pumped against resistance (i.e., pumping closed valves or high heads).
Therefore, the pressure produced by the two pumps in a double gear pump may be different, but this depends on the specific design and operating conditions. It is important to consult the manufacturer's specifications and guidelines for the specific dual gear pump being used to determine the pressure capability of the pump.
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