1. What is a pump?
Answer: A pump is a mechanical device used to transport liquids and directly add energy to the liquids.
2. What energy can the pump provide to the liquid?
Answer: The pump can provide static pressure energy, potential energy and kinetic energy to the liquid to overcome the resistance loss.
3. What are the classification methods of pump oil?
Answer: The classification is as follows:
(1) Divided by working principle: vane pump, positive displacement pump
(2) According to usage: such as water pump, oil pump, ammonia pump, mud pump, condensate pump, etc.
(3) According to the number of impellers on the pump shaft: single-stage pump, multi-stage pump
(4) According to the impeller suction method: single suction pump, double suction pump
(5) According to the installation method: horizontal pump, vertical pump
(6) According to the temperature of the conveying medium: hot oil pump, cold oil pump
(7) According to the form of the pump body: volute pump, turbine pump, barrel belt pump
4 What is a vane pump, positive displacement pump?
Answer: The vane pump is delivered by the impeller rotating inside the pump. Due to the different blade structure of the pump, it is centrifugal and vortex pump.
Positive displacement pumps use periodic changes in the pump's working volume to deliver liquids and are divided into reciprocating pumps and rotor pumps.
5. What are the main components of the heart pump?
Answer: The centrifugal pump is generally composed of the following components: pump body, impeller, shaft, casing, mouth ring, impeller mouth ring, shaft sleeve, sealing device, balancing device such as balancing disk or balancing drum, pump body bolt, etc.
6. What is the flow rate of the pump?
Answer: The amount of liquid discharged by the pump per unit time. The flow rate of the pump can be divided into two kinds of weight flow and volume flow. The weight flow refers to the weight of the fluid passing through per unit time. Volume flow refers to the volume of fluid that passes through per unit time.
7. What is the pump head? How is it related to the impeller diameter, speed, and flow?
Answer: The increase in energy of the unit weight liquid from the pump inlet to the pump outlet, which is the effective energy obtained after the unit weight liquid passes through the pump, is called the pump head, also known as the head.
The head of the centrifugal pump is proportional to the square of the diameter of the impeller and proportional to the speed of the impeller. The larger the flow after the diameter and speed of the impeller are fixed, the smaller the head.
8. What is the flow rate of the pump?
Answer: The distance traveled by the liquid in a unit of time.
9. What is vacuum?
Answer: The value where the pressure inside the device is less than atmospheric pressure is called vacuum. The higher the vacuum degree, the lower the absolute pressure in the equipment, and the lower the vacuum degree, the higher the absolute pressure in the equipment. The maximum value of the vacuum will not be higher than one atmosphere.
Vacuum = atmospheric pressure-absolute pressure
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