Special lecture on mechanical equipment: “Pumps” – Learn a little every day (16): Rotor pumps “Improve yourself””

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This post was last edited by A’Dai A’Mu on 2013-12-12 at 12:29. In order to encourage more active participation in discussions and a more proactive approach to learning, the top five users each time will receive a “Proactive Learning Reward”. Some people might think that it’s terrifying to spend their working days doing nothing, performing tasks that seem like menial chores, not knowing what to do or what to learn, day after day, year after year, with no vision for their future! We must start working hard from now on; even if we learn a little knowledge every day, it will add up over time and help us enrich ourselves. We need to set clear goals – only by filling our minds first can we enrich other aspects of our lives as well. . . . . . It only takes a short ten-odd minutes per day, and you will see the future! ! ! (Anyway, I have learned it; whether you learn it or not is up to you. Besides those experts like Hai Chuan, there are still others who know it.) . . ) Enough talk – let’s start with the basics today~~! With so many special posts published over these days, everyone must have benefited a lot, thank you all for your support~~! Welcome everyone to listen. I have started broadcasting, and I hope those who, like me, want to gain knowledge every day will listen. Let’s learn together every day and discuss~~! These past few days, many people have asked questions, and I’ll do my best to answer them all. There might be some questions I haven’t encountered before, but there are still plenty of people in our community who can help answer them. @AidaiAmu @hcwang12345 @YiHuXiangMing @tjdxz @YouDianDai @NewbiesInHaiChuan @LoveStory @ManTianYun @ZhaoQingsheng The mixed-flow pump was installed the day before yesterday; I believe those interested in pumps now have a better understanding of pneumatic diaphragm pumps!! From now on, I’ll try to break down the knowledge into smaller parts, in smaller amounts, to make it easier for everyone to learn*~~! Someone has asked me about pneumatic diaphragm pumps these past two days! Today, I’ll explain rotor pumps to you all~~! It might not cover everything; if you have any questions, please ask on the floor. Thank you~~! Rotary pump. Introduction to stainless steel rotary pumps. Rotary pumps are also known as colloidal pumps, triple-lobe pumps, or sole pumps. It relies on two rotors that rotate in opposite directions synchronously (with 2–4 teeth each) to create a suction force (vacuum) at the inlet during rotation, thereby drawing in the material to be transported. The two rotors divide the rotor chamber into several small spaces and rotate in the order of a→b→c→d. When operated to position a, only chamber I is filled with the medium ； Upon reaching position b, part of the medium was enclosed in chamber B ； Upon reaching position C, the medium was also sealed in chamber A ； Upon reaching position d, chamber A becomes connected to chamber II, and the medium is then delivered to the outlet. In this repeating cycle, the medium (material) is continuously transported out. 　　Structure of the rotor pump: It features an integrated coupling assembly, which reduces its size (the length can be shortened by 100–250 mm), thereby minimizing the space it occupies. The design is compact; the outer surface is made of stainless steel and polished to a mirror finish, giving it an attractive appearance and a high-quality look. This approach prevents the peeling off of paint that was used in traditional methods. Performance optimization: The use of an integrated coupling assembly reduces power consumption, noise, and wear associated with elastic couplings, thereby improving work efficiency. This results in the highest efficiency, minimal internal sliding, and a longer service life. 　　 Working principle of the rotor pump: The rotor pump relies on two rotors that rotate in opposite directions synchronously; with 2–4 teeth each, these rotors create a vacuum at the inlet during rotation, thereby drawing in the material to be transported. The two rotors divide the rotor chamber into several small spaces and rotate in the order of a→b→c→d. When operated to position a, only chamber I is filled with the medium ； Upon reaching position b, part of the medium was enclosed in chamber B ； Upon reaching position C, the medium was also sealed in chamber A ； Upon reaching position d, chamber A and chamber B become connected to chamber II, and the medium is then delivered to the outlet. In this repeated cycle, the medium (material) is continuously transported out. 　　Introduction to the application areas of rotor pumps:
1. Food and beverages: dairy products, latex, chocolate, syrups, cheese, malt liquor, beer, soda.
2. Fruit concentrates: puddings, jams, jellies, ketchup.
3. Paste-like products: fats and oils, etc.
4. Cosmetics: creams, detergents, hair gels, essential oils, etc.
5. Pharmaceuticals: extracts, emulsions, pill pastes, etc.
6. Chemical industry: dyes, fats, solvents, resins, and polymers.

Technical parameters:
1. Flow rate: Q = 200 liters/hour to 48,000 liters/hour.
2. Viscosity range of the materials being transported: 0.2 CP to 500,000 CP.
3. Maximum outlet pressure: 0.8–1.2 Mpa (at high viscosities).
4. Product temperature range: from -30°C to 150°C.

Features of rotor pumps:
1. Comparison with centrifugal pumps (milk pumps): Centrifugal pumps are widely used due to their simple structure and low cost. Compared with rotor pumps, it has the following main differences: chemical pumps, sanitary pumps. (1) Rotor pumps are positive displacement pumps; their flow rate can be controlled with high precision, and they can also be easily designed as variable flow pumps. The output flow rate of a centrifugal pump cannot be controlled; it decreases as the resistance increases ； Rotary pumps have a strong self-priming ability, whereas centrifugal pumps must be filled with liquid before operation. 　　(2) The rotational speed of the rotor pump is very low, generally ranging from 200 rmp to 600 rmp, allowing the material being transported to be discharged smoothly without its composition being compromised. Centrifugal pumps operate at high speeds, and the material being transported is subjected to strong impacts as well as centrifugal forces. As a result, when these pumps are used to transport mixtures, it is common for the components of the mixture to separate from each other, which reduces the quality of the final product. The universal transfer pump is the best solution to this problem, which is why it is particularly suitable for transporting mixtures or materials that contain solid particles. 　　(3) Rotary pumps can be used to transport substances with very high viscosity, which is why they are also known as colloidal pumps. Centrifugal pumps do not have this feature. 　　(4) Rotary pump models with high output pressures, such as 150 kgf/cm2, can be easily manufactured, making them suitable for quantitative transfer over long distances or under high resistance conditions. (5) Rotary pump manufacturing is complex and precise, resulting in high costs; this is also the biggest difference between it and centrifugal pumps. The equation-type cavity rotor pump falls within the category of positive displacement pump technology. Compared with existing vane pumps, gear pumps, screw pumps, and piston pumps, it features a long service life, low noise level, uniform flow rate, simple structure, small size, light weight, and ease of manufacturing. It is suitable for use in oil fields, as transfer pumps for petroleum products in refineries, and as corrosion-resistant pumps for various viscous media in the daily chemical industry. It can be used for hydraulic pumps, lubrication pumps, cooling pumps, etc., as auxiliary components in industries such as machine tool manufacturing, general construction machinery, the automotive industry, mining machinery, lifting equipment, metallurgy, construction machinery, hydroelectric and wind power generation systems, ships, offshore equipment, the transportation sector, industrial robots, railway construction, material handling, the defense industry’s fluid handling applications, rubber and plastic machinery, and automated equipment. It is also used as vacuum pumps for vacuum equipment. Roller-type rotor pump: This product was developed by building on the technology of similar products from the American company Hydrac; it is a new type of single-rotor pump. The product features a rational structure, extremely strong self-priming capability, excellent cavitation resistance, and certain capabilities for transporting gases and liquids simultaneously. It is widely used in industries such as petrochemicals, fine chemicals, daily chemicals, and pharmaceuticals, and is suitable for transporting various chemical media, whether corrosive or non-corrosive. The performance specifications of this product include a flow rate of 1–80 m^3/h ； Discharge pressure ≤ 1.6 Mpa ； Rotational speed ≤ 730 r/min ； Power ≤ 55kw. This product has a broad market and good profits. Stainless steel rotor pumps, also known as universal transfer pumps, colloidal pumps, three-blade pumps, or sole pumps, are widely used in industries such as food and beverage, chemicals, and pharmaceuticals. Due to the special shape of the pump’s rotor and the high precision requirements, there are few manufacturers in China capable of producing it successfully; as a result, many users are forced to purchase imported equipment. Technical parameters: 1. Flow rate: Q=300 liters/hour–54,000 liters/hour ； 2. Viscosity range of the material being transported: 0.2CP–500,000CP ； 3. Outlet pressure: 0.3–0.6 MPa; the highest pressure occurs when the viscosity is between 3000.000–5000.000 CP, at 0.8–1.5 MPa ； 4. The product temperature ranges from -30°C to 150°C. After watching the lecture, have you also gained an understanding of rotary pumps? Come on, learn a little knowledge every day to enrich yourself; little by little, it all adds up to something great~~~! Below are my special series of lectures on mechanical equipment – “Pumps”. Learn something new every day: (16) Pneumatic diaphragm pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1257985-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (15) Pneumatic diaphragm pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1257433-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (14) Mixed-flow pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1257224-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (13) Axial flow pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256970-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (12) Jet vacuum pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256707-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (11) Automotive pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256253-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (10) Pump materials – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255790-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (9) Self-priming pumps and pump materials – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255635-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (8) Oil seals – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255340-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (7) Seals – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255132-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (6) O-rings – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254912-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (5) Pump structure – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254630-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (4) Pump structure – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254625-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (3) – “Improve your knowledge” http://bbs.hcbbs.com/thread-1253809-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (2) Schematic diagram of centrifugal pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1253590-1-1.html. Lectures on mechanical equipment – “Pumps”: Learn something new every day (1) Pump selection – “Improve your knowledge”. These are my special posts; I will continue to update them daily. Please give me your support, listen, and discuss! ； If there’s any direction that needs to be explained, feel free to contact me. If many people ask for it, I’ll create a separate post to go over it~~! Welcome everyone to listen. I have started broadcasting, and I hope those who, like me, want to gain knowledge every day will listen. Let’s learn together every day and discuss~~!