Special lecture on mechanical equipment: “Pumps” – Learn a little every day (2): Schematic diagram of centrifugal pumps. “Improve yourself””
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This post was last edited by tclz007 on 2013-12-9 at 18:56. 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.” There are also series of lectures on mechanical devices, with one focusing on “pumps”; these posts summarize the knowledge learned each day and are updated regularly: http://bbs.hcbbs.com/thread-1256318-1-1.html. Some people might think 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. . . . . . Just spend a short ten-odd minutes every 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~~! Yesterday we talked about pump selection; today let’s take a look at pumps~~! Starting today, we will learn about the structure, operating conditions, and characteristics of *pumps! Structural diagram of S-type single-stage double-suction center-split pump. I. Product overview: S-type single-stage double-suction horizontal center-split centrifugal pump. For this type of pump, both the inlet and outlet are located below the pump’s axis. During maintenance, it is sufficient to remove the pump cover in order to take out all the components for repair. An S-type pump is mainly composed of a pump body, pump cover, shaft, impeller, sealing ring, shaft sleeve, bearing components, etc. Its performance meets the standards specified in JB/1050-93 \"Types and Basic Parameters of Single-Suction and Double-Suction Centrifugal Pumps for Clean Water.\" It is mainly used to transport clean water free of solid particles or other liquids with physical and chemical properties similar to water. Suitable for industrial and urban water supply and drainage, as well as irrigation and drainage in agricultural fields. II. Product Features 1. Sealing system: Mechanical seals and packing seals are available as options, with internal circulation used for their cooling and lubrication ； 2. High flow rate and high efficiency: The double-suction impeller features a high flow rate and high efficiency ； 3. Replaceable bushing: As a wear part, the bushing protects the shaft and extends the pump’s service life ； 4. Sealing ring: As a wear part, the sealing ring helps improve the efficiency of the pump and extend its service life. III. Working Conditions Flow rate range: 30–6500 m3/h Head range H: 8–140 m Medium temperature: –20°C to +80°C Ambient temperature: ≤+40°C Structural diagram of the AS tear-type sewage pump I. Product Overview The main components of the AS submersible sewage pump are the impeller, pump body, base, and submersible motor. The water pump shaft and the motor shaft are the same shaft; since the water pump is located at the very bottom of the entire sewage pump, it can draw in as much excess wastewater from the ground surface as possible. The AS submersible sewage pump features a tearing mechanism that can tear and cut materials such as fibers, allowing them to be discharged smoothly; therefore, this type of pump is particularly suitable for transporting sewage containing long fibers. The product complies with the JB/5118-2001 standard for submersible electric pumps for sewage and waste. II. Product Features 1. Durable and waterproof cable: A heavy-duty rubber-sheathed flexible cable that is resistant to dirt; it is filled with resin and secured tightly, ensuring no loosening and long-term reliability. 2. Dual sealing, dual protection: Two mechanical seals are arranged in series to provide true dual protection and ensure the safety of the motor. 3. Multiple detection channels and multiple protection mechanisms: Equipped with a control cabinet, oil-water probes, and float switches, it enables real-time monitoring, as well as functions such as alarm generation, shutdown, and retention of fault signals, ensuring the safety and reliability of the submersible motor. 4. Easy maintenance: A dual-guideway coupling device can be used, eliminating the need for underwater operations when lifting or lowering the pump; this facilitates maintenance and saves time and effort ； The dedicated electrical control cabinet enables automatic alarm, shutdown, and retention of fault signals, which can significantly improve maintenance efficiency. 5. Operation under all conditions: The pump, featuring a special hydraulic design, operates without overload under all operating conditions. III. Operating ConditionsFlow rate range: 6–180 m³/h
Head range: 3–17 m
Rotational speed n: 1450–2900 r/min
Ambient temperature T: ≤+40°C
Medium temperature: –15°C–+60°C
Medium density: ≤1.3×10³ kg/m³
Medium pH range: 5–9
Maximum operating pressure of the system: ≤0.6 Mpa
Structural diagram of the GDL vertical multi-stage pump
Photo description: The GDL series is a vertical single-suction multi-stage pipeline centrifugal pump; the inlet and outlet are located on the same straight line. This product complies with the standard JB/T2727-93 “Types and Basic Parameters of Vertical Multi-stage Cylindrical Centrifugal Pumps”. 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. Learn something new every day: (15) Pneumatic diaphragm pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1257433-1-1.html. Learn something new every day: (14) Mixed-flow pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1257224-1-1.html. Learn something new every day: (13) Axial flow pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256970-1-1.html. Learn something new every day: (12) Jet vacuum pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256707-1-1.html. Learn something new every day: (11) Automotive pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1256253-1-1.html. Learn something new every day: (10) Pump materials – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255790-1-1.html. Learn something new every day: (9) Self-priming pumps and pump materials – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255635-1-1.html. Learn something new every day: (8) Oil seals – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255340-1-1.html. Learn something new every day: (7) Seals – “Improve your knowledge” http://bbs.hcbbs.com/thread-1255132-1-1.html. Learn something new every day: (6) O-rings – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254912-1-1.html. Learn something new every day: (5) Pump structure – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254630-1-1.html. Learn something new every day: (4) Pump structure – “Improve your knowledge” http://bbs.hcbbs.com/thread-1254625-1-1.html. Learn something new every day: (3) “Improve your knowledge” http://bbs.hcbbs.com/thread-1253809-1-1.html. Learn something new every day: (2) Schematic diagram of centrifugal pumps – “Improve your knowledge” http://bbs.hcbbs.com/thread-1253590-1-1.html. 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 dedicated post to cover it~~! :) A series of special lectures on mechanical equipment titled “Pumps” – a summary post featuring new knowledge shared every day, with ongoing updates at http://bbs.hcbbs.com/thread-1256318-1-1.html. To encourage more active participation in discussions and learning, the top five users each time will receive an “Active Learning Reward””
This post was last edited by tclz007 on 2013-11-26 at 22:16. Diagram of the IHG vertical chemical pump – The IHG vertical pipeline-type chemical pump is widely used in industries such as petroleum, chemicals, textiles and printing, pharmaceuticals, food processing, metallurgy, and power generation for transporting corrosive fluids as well as those with special requirements. This product complies with the standard GB5656-1994 \"Technical Requirements for Centrifugal Pumps (Class II)\". Diagram of the WL type vertical sewage pump – The WL type vertical sewage pump is a vertical single-stage, single-suction vortex pump; its impeller features a dual-channel design, enabling it to handle fiber materials up to 5 times the diameter of the pump’s outlet, as well as solid particles with a diameter of 50% of the outlet diameter. This product adheres to the standard JB/T6535-92 \"Technical Requirements for Centrifugal Sewage Pumps\". Diagram of the chemical shielded pump – It features a completely new static sealing mechanism that ensures no leaks, thus protecting the working environment from contamination. It is mainly suitable for use in industries such as petroleum, chemicals, textiles and printing, pharmaceuticals, food processing, metallurgy, power generation, and nuclear energy for transporting corrosive fluids and those with special requirements
Learned*........
This post was last edited by tclz007 on 2013-12-3 at 13:33. It’s part of a series of lectures on mechanical equipment focused on \"pumps\"; a thread that gathers knowledge learned each day, with ongoing updates: http://bbs.hcbbs.com/thread-1256318-1-1.html. Structural diagram of the QDL multi-stage centrifugal pump. I. Product overview: The QDF vertical multi-stage centrifugal pump is manufactured using advanced pump-making technology from Denmark. Its internal impeller, pump casing, and main components are made from stainless steel through stamping; the flow channels are smooth, ensuring high efficiency and preventing secondary pollution. The motor uses aluminum alloy die-cast parts, which feature light weight, small size, and excellent heat dissipation. The product complies with the standard Q/JBJW11-2003 \"Multi-stage Centrifugal Pumps\". II. Product Features 1. Easy maintenance: It features a vertical pipe-style structure with the inlet and outlet at the same level. The pump’s inlet and outlet can be installed at any position and in any direction along the pipeline, just like valves, making installation and maintenance extremely convenient. 2. No water pollution: The main flow-through components are made from stainless steel via stamping, and they feature light weight, cleanliness, and hygiene – making them ideal green, environmentally friendly, energy-saving water pumps. 3. Low operating costs: The main flow-through components are made from stainless steel; their smooth surface ensures high efficiency, low losses, a low failure rate, and a long service life for the accessories, resulting in lower operating and maintenance costs for the entire pump. 4. Motor: The motor is made of aluminum alloy die-cast parts, featuring light weight, small size, good heat dissipation, and an attractive appearance. With its wide voltage operation capability, as well as a unique fan design and shroud design, it features high reliability, long service life, high versatility, high efficiency, low noise, excellent starting performance, high protection level, and high insulation level. III. Working Conditions Medium: A liquid that is suitable for cleaning at both cold and hot temperatures, is non-flammable and non-explosive, and does not contain solid particles or fibers. Flow rate range: 2–32 m3/h; Head range: 15–195 m. Liquid temperature: Medium temperature: –15°C to +105°C; Ambient temperature: ≤+40°C. Maximum operating pressure of the system: ≤2.5 Mpa. Structural diagram of vertical and horizontal constant-pressure fire pumps. I. Product overview: The XBD(HL) and XBD(HW) series of pumps are vertical and horizontal constant-pressure fire pumps that have been developed by our company in response to market demands. They are new products suitable for fire water supply in high-rise buildings, and represent reliable, high-quality pumps designed specifically for firefighting purposes. Its performance and technical specifications meet the requirements of the standard GB6245-1998 \"Performance Requirements and Test Methods for Fire Pumps\". II. Product Features 1. Voltage and flow rate stabilization: As the pump’s flow rate varies from zero to its maximum desired value, its head remains within a 5% range; moreover, no overpressure occurs at low or zero flow rates. This prevents the overpressure issues associated with conventional centrifugal pumps in firefighting situations, where overpressure occurs at low flow rates while water supply is insufficient at high flow rates. 2. High efficiency and energy savings: CFD computational fluid dynamics is used to analyze and determine the pressure and velocity distributions within the pump, thereby optimizing the pump’s flow channel design. This ensures that the pump has an efficient hydraulic profile, improving its efficiency. The flow-through components such as the pump body, pump cover, and impeller are molded using resin sand molds, which ensures the appearance, flow channel dimensions, and hydraulic efficiency of the pump. 3. Smooth operation, safe and reliable: The motor is directly connected to the pump, which simplifies the intermediate transmission structure and enhances operational stability, ensuring smooth and safe operation of this unit. 4. Stainless steel shaft sleeves: The location of the mechanical seal on the shaft is a place prone to rusting; once the shaft of a direct-drive pump gets rusty, it can lead to the failure of the mechanical seal. The XBD(HL) and XBD(HW) pumps are equipped with stainless steel shaft sleeves here, which prevents rusting, extends the lifespan of the shafts, and reduces operating and maintenance costs. 5. Easy to use for users and low in investment: With the pump and motor on the same axis, the intermediate transmission structure is simplified, resulting in 20% less capital investment compared to ordinary pumps. III. Working Conditions
Rotation speed: 1500/3000 min (synchronous speed of the motor)
Medium temperature: ≤+80°C (clean water)
Flow rate range: 5–80 L/s
Head range: 0.3–2.0 MPa
Maximum operating pressure of the system: ≤3.0 MPa
Here is my special topic series:
http://bbs.hcbbs.com/thread-1255913-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (10): Pump materials – “Improve yourself”
http://bbs.hcbbs.com/thread-1255790-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (9): Self-priming pumps and pump materials – “Improve yourself”
http://bbs.hcbbs.com/thread-1255635-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (8): Oil seals – “Improve yourself”
http://bbs.hcbbs.com/thread-1255340-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (7): Seals – “Improve yourself”
http://bbs.hcbbs.com/thread-1255132-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (6): O-rings – “Improve yourself”
http://bbs.hcbbs.com/thread-1254912-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (5): Pump structure – “Improve yourself”
http://bbs.hcbbs.com/thread-1254630-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (4): Pump structure – “Improve yourself”
http://bbs.hcbbs.com/thread-1254625-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (3) – “Improve yourself”
http://bbs.hcbbs.com/thread-1253809-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (2): Schematic diagram of centrifugal pumps – “Improve yourself”
http://bbs.hcbbs.com/thread-1253590-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (1): Pump selection – “Improve yourself””
Rotation speed: 1500/3000 min (synchronous speed of the motor)
Medium temperature: ≤+80°C (clean water)
Flow rate range: 5–80 L/s
Head range: 0.3–2.0 MPa
Maximum operating pressure of the system: ≤3.0 MPa
Here is my special topic series:
http://bbs.hcbbs.com/thread-1255913-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (10): Pump materials – “Improve yourself”
http://bbs.hcbbs.com/thread-1255790-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (9): Self-priming pumps and pump materials – “Improve yourself”
http://bbs.hcbbs.com/thread-1255635-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (8): Oil seals – “Improve yourself”
http://bbs.hcbbs.com/thread-1255340-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (7): Seals – “Improve yourself”
http://bbs.hcbbs.com/thread-1255132-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (6): O-rings – “Improve yourself”
http://bbs.hcbbs.com/thread-1254912-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (5): Pump structure – “Improve yourself”
http://bbs.hcbbs.com/thread-1254630-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (4): Pump structure – “Improve yourself”
http://bbs.hcbbs.com/thread-1254625-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (3) – “Improve yourself”
http://bbs.hcbbs.com/thread-1253809-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (2): Schematic diagram of centrifugal pumps – “Improve yourself”
http://bbs.hcbbs.com/thread-1253590-1-1.html – Special lectures on rotating equipment “Pumps”; learn something new every day (1): Pump selection – “Improve yourself””
I hope we can discuss this and improve together~~!
Is the second type of pump also called a tube bundle pump?
I know about tube bundle dryers and tube bundle cleaning pumps? Are you referring to a tube cleaning pump?
The questions I want to ask are as follows: 1. Where did you learn so much? 2. Can the brain hold all this knowledge every day? Maybe I’m a bit old now, hehe
Maybe there are indeed things we don’t need, and we don’t have to force ourselves to memorize them; it’s enough to have some memory of them in case we encounter them someday. One should never be afraid of learning too much, as there’s always a use for what one learns. Of course, one can also choose what to learn! In my opinion, no matter what we do, attitude is everything!
Make a little progress every day; it’s never a bad thing to learn more – just put in the effort
Learn a little every day, make a little progress; only by learning more can one improve