Posted on Mar 9, 2020
Embracing the world trend world of automation, now global industrial workers all prefer to make their stuff smart rather than ordinary. And in the field of liquid management, automatic flow-controlled pumps are the high end pump types that can bring the maximum benefits to the users across industrial sector.
Pump industry today is changing rapidly and in both automation and water consumption sectors that need to proceed machining tasks in the new century tend to purchase machining centers with robotic arm accessories for a wider application and usages. Even if the pumps and valves are the most fundamental capital goods for manufacturers and play the critical role that determines the final output of the end products, components of these simple equipment are still playing an important but independent role in the accessories market and the relevant industrial sectors. The innovative designs and new applications will keep motivating the industry as well as industrial insiders to make the best use of those components that help to accelerate the liquid transmission and the relevant automation engineering.
Speaking of the automation of liquids, it is a very big topic but here we have some references for readers to think about your cases. Now, for instance, the liquid management is ordinary job though, while pump unit is the most fundamental components. Pumps are used for liquid transmission, and pump and valve are important units for workers in the working field. However pump is not like valve in many phases. Normally pumps are equipment that moves fluids-state substance such as liquids by its mechanical action. Traditionally speaking, pumps can be categorized into three major kinds based on the method those pumps exploited to move the targeted substance. As mentioned above, the three categories are based on the methods that pumps used to transmit the targeted liquids.
Furthermore, these three types are determined by the way they move the fluids, and there are direct lift, displacement, and gravity methods that people invented in the early stage in the history of industry. In the market, there are three kinds of pumps, one is direct lift pump, and the other is displacement pump, and the last one is the gravity pump. Pumps are typically operated by either typically reciprocating or rotary mechanism, and these all consume energy to perform mechanical work moving the targeted fluid. On the one side, mechanical pumps can also be submerged in the fluid in which they are pumping, or they can also be placed external to the fluid. All these units, if controlled by well-tuned controller, are with good potential competence.
All kinds of mechanism needs energy as the first cause for sure, and generally speaking, pumps can operate through many power (energy) sources due to its flexible nature, such as manpower’s’ manual operation, electricity, engines, or even wind power. Those energy sources can be a wide variety of equipment which comes in any sizes, from microscopic for use in medical applications to large industrial pumps for waterworks, or ordinary size industrial pump for machine tool coolant transmission. Industrial pumps serve in a wide range of applications such as pumping water from conventional wells, aquarium filtering duty, pond filtering tasks, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers. For instance, In the machine tool sectors, pumps are used to move cutting liquids, coolants, etc. in the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis. Now let’s move on to the next subject and see if the positive displacement method looks attractive.
As we know, unlike centrifugal pumps, a positive displacement pump can produce the same flow at a given speed no matter what the discharge pressure. As a result, positive displacement pumps are constant flow machines. At the same time, however, a slight increase in internal leakage as the pressure increases prevents a truly constant flow rate. That is to say, a positive displacement pump must not operate against a closed valve on the discharge side of the pump, as it has no shutoff head like centrifugal pumps. Therefore, positive displacement pumps operating against a closed discharge valve continue to produce flow and the pressure in the discharge line increases until the line bursts, the pump is severely damaged. For safety concern, a relief or safety valve on the discharge side of the positive displacement pump is thus necessary, and both manufacturers of pump and users in the industry shall be careful of this issue. The relief valve can be either internal or external. Pump manufacturers normally have the option to supply internal relief or safety valves. In sum, industrial users need to know more about automatic control and pump mechanism in order to have better utilization of their pump management design.