【Q&A】May 2, 2017
Thread Content
Question: Into which categories can pumps be classified based on their working principle? Answer: It can be divided into: (1) Positive displacement pumps: These use the periodic variation in the volume of the working chamber to transfer liquids, and are further categorized into reciprocating pumps and rotary pumps ； (2) Vane pumps: These use the rotational motion of the working impeller to transport liquids, and are classified into centrifugal pumps, mixed-flow pumps, axial flow pumps, etc ； (3) Other types of pumps: including hydrodynamic pumps, electromagnetic pumps, etc. Hydrodynamic action pumps use the energy of another working fluid to transport liquids. http://bbs.hcbbs.com/static/image/hrline/4.gif Petrochemical Zone—New Ideas for Energy Saving: The “Creative Thinking” Campaign (Sponsors sought; highest returns ever offered) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the event organizer. The Petrochemical Processing Edition—sharing pictures of chemical equipment has begun! A vast amount of wealth, as well as Hchuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. “Petroleum and Chemicals Section”: Notice regarding the collection of chemical industry-related materials: http://bbs.hcbbs.com/thread-1614796-1-1.html. http://bbs.hcbbs.com/hcdown/data/attachment/forum/201704/07/123053embbjkok61hz6vvz.jpg.thumb.jpg. Hchuan Network’s special event for Labor Day: “Remembering the Glorious Moments”: http://bbs.hcbbs.com/thread-1774529-1-1.html. (Source: Hchuan Chemicals Forum) [Haixin Chemicals Cup ★ Spring Has Arrived in Hchuan Chemicals]: A compilation of posts sharing beautiful scenery from 2017; you can take a look at the local landscapes posted by users from various places in your free time: http://bbs.hcbbs.com/thread-1766484-1-1.html
Vane pump, positive displacement pump, other types
1. Positive displacement pumps – these use the periodic change in the volume of the working chamber to transfer liquids, and are divided into reciprocating pumps and rotary pumps (also known as rotor pumps). Reciprocating pumps are further divided into piston pumps and diaphragm pumps ； Rotary pumps are further divided into gear pumps, screw pumps, etc. 2. Vane pumps – utilize the rotational motion of the working impeller to transport liquids; they include centrifugal pumps, mixed-flow pumps, axial flow pumps, vortex pumps, etc. 3. Other types of pumps – including hydrodynamic pumps, electromagnetic pumps, etc.
(1) Positive displacement pumps: These use the periodic variation in the volume of the working chamber to transfer liquids, and are divided into reciprocating pumps and rotary pumps； (2) Vane pumps: These use the rotational motion of the working impeller to transport liquids, and are classified into centrifugal pumps, mixed-flow pumps, axial flow pumps, etc ； (3) Other types of pumps: including hydrodynamic pumps, electromagnetic pumps, etc. Hydrodynamic action pumps use the energy of another working fluid to transport liquids.
(1) Positive displacement pumps: These use the periodic variation in the volume of the working chamber to transfer liquids, and are divided into reciprocating pumps and rotary pumps； (2) Vane pumps: These use the rotational motion of the working impeller to transport liquids, and are classified into centrifugal pumps, mixed-flow pumps, axial flow pumps, etc ； (3) Other types of pumps: including hydrodynamic pumps, electromagnetic pumps, etc. Hydrodynamic action pumps use the energy of another working fluid to transport liquids.
1. Positive displacement pump: It draws in and discharges liquid by causing the working volume to increase and decrease periodically due to the movement of the working components, and it increases the pressure energy of the liquid directly through the compression exerted by these components. Depending on the way the moving parts move, they are further divided into two categories: reciprocating pumps and rotary pumps. Depending on the structure of the moving parts, there are piston pumps and plunger pumps; as well as gear pumps, screw pumps, vane pumps, and water ring pumps. 2. Impeller pumps Impeller pumps transfer mechanical energy to the liquid being transported by using an impeller to drive the liquid to rotate at high speed.
(1) Positive displacement pumps: These use the periodic variation in the volume of the working chamber to transfer liquids, and are divided into reciprocating pumps and rotary pumps； (2) Vane pumps: These use the rotational motion of the working impeller to transport liquids, and are classified into centrifugal pumps, mixed-flow pumps, axial flow pumps, etc ； (3) Other types of pumps: including hydrodynamic pumps, electromagnetic pumps, etc. Hydrodynamic action pumps use the energy of another working fluid to transport liquids.
It can be classified as follows: (1) Classification by the working principle of the pump. 1. Vane pumps: Vane pumps convert the mechanical energy generated by the high-speed rotation of the impeller in the pump into kinetic energy and pressure energy of the liquid. It is called a vane pump because of the curved and twisted vanes inside the impeller. Based on the different forces exerted by the impeller structure on the liquid, vane pumps can be classified as follows: a. Centrifugal pump: a pump that transports liquid by means of the inertial centrifugal force generated by the rotation of the impeller. b. Axial flow pump: A pump that draws liquid by means of the axial thrust generated by the rotation of the impeller. It belongs to the low-head, high-flow pump category; the typical performance range is a head of 1–12 meters ； Flow rate: 0.3–65 m3/s, specific speed: 500–1600. c. Mixed-flow pump: A pump in which the rotation of the impeller generates both inertial centrifugal force and axial thrust to pump liquid. 2. Positive displacement pump: It transports liquids by utilizing the periodic change in the volume of the working chamber. There are piston pumps, plunger pumps, diaphragm pumps, gear pumps, screw pumps, etc. 3. Other types of pumps: there are jet pumps, water hammer pumps, electromagnetic pumps, etc.