Special lecture on mechanical equipment: “Pumps” – Learn a little every day (4) “Improve yourself””

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This post was last edited by tclz007 on 2013-12-3 at 13:32. In order to encourage more active participation in discussions and a greater enthusiasm for learning, the top five users each time will receive a “Motivation Reward for Active Learning.” 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. Apart from those experts like Hai Chuan, there are still others who know it.) . . ) Enough talk – let’s start with the basics today!! Today, we will continue to learn about the structure, operating conditions, and features of *pumps! (Familiarize yourself with all the pumps first.) CZ Chemical Process Pump Structure Diagram. I. Product Overview: The CZ type horizontal chemical process pump is developed by modifying and designing the CZ pump in accordance with API 610, Version 8, the standards set by the American Petroleum Institute. This design facilitates the upgrading and renovation of processing units. It features a horizontal suspension structure, a radial section, and a single-suction, single-stage design with rear access doors. By using an extended coupling, it is possible to disassemble and repair the pump without moving the motor or removing the pipelines. It can transport liquids with a certain degree of corrosiveness and at a specific temperature. II. Product Features 1. High standard requirements: The CZ pumps were modified in accordance with the relevant technical requirements of API 610, Version 8, which are higher than the standards of API 610, Version 6, as well as the standards GB 3215-83 \"General Technical Requirements for Centrifugal Pumps Used in Refineries, Chemical Industries, and Petrochemical Processes\" and GB 5656-1994 \"Technical Requirements for Centrifugal Pumps – Class II\". 2. New casting process: The flow-through pump components of the DFCZ pump (such as the pump body, impeller, pump cover, sealing rings, etc.) are manufactured using precision casting with silicone resin, ensuring stable channel dimensions ； After the casting is formed, an acid cleaning process is used to remove any residues remaining on its surface, thereby preserving the true nature of the metal; this prevents the casting residues from affecting the medium that is transported. 3. Dual volutes: The pump casing of some large-diameter (80 mm and above) high-head pumps features a dual-volute design, which effectively addresses the issue of excessive radial pressure in such pumps. 4. Cooling chamber: The pump cover features a water cooling chamber design, which helps to mitigate the adverse effects of high temperatures of the transported medium on the mechanical seal and bearings. 5. Mechanical seal: It can adopt single-face, double-face, or metal bellows structures depending on different operating conditions, offering reliable sealing performance. 6. Back blade: A back impeller is provided on the back side of the impeller; together with the balance holes, it helps to balance the axial forces, while also reducing the pressure in the shaft seal chamber and thereby improving the operating conditions of the shaft seal. 7. Bearings: These are heavy-duty bearings designed for enhanced load capacity, lubricated with light oil; they offer a high load-bearing capacity and a long service life (>25,000 hours). 8. Coupling: Elastic pin couplings or diaphragm couplings are available for selection (the extended version uses diaphragm couplings); they offer high load-bearing capacity and efficient transmission performance. 9. Fully sealed shaft: The shaft is sealed by the impeller, as well as the sealing gaskets and O-rings located at the front and back of the shaft sleeve, which prevents the shaft from coming into contact with the medium and thus extends its lifespan. 10. High pressure resistance: This pump model is designed to withstand a pressure of 2.5 MPa, which is higher than the 1.6 MPa of IH pumps. III. Operating Conditions: Flow rate: 13–2000 m3/h; Head: 14–160 m. Temperature: –80°C to +140°C (standard type), +140°C to +300°C (type with water-cooling chamber). Diameter: 32–300 mm. Ambient temperature: ≤+40°C. Maximum operating pressure of the system: ≤2.5 Mpa. Structural diagram of D and DG series multi-stage pumps. I. Product Overview: The D and DG series of pumps are horizontal, single-suction, multi-stage, segmented centrifugal pumps. These pumps feature high efficiency, a wide range of performance options, safe and stable operation, low noise, long service life, and easy installation and maintenance. The product complies with the JB/T1051-93 standard \"Types and Basic Parameters of Multi-stage Centrifugal Pumps for Clean Water.\" For transporting clean water or other liquids with physical and chemical properties similar to water. It can also be used to transport hot water, oils, corrosive substances, or media containing abrasive particles by changing the material of the pump’s flow-through components, the type of sealing, and by adding a cooling system. II. Product Features 1. High efficiency and easy installation/maintenance: It features a high-efficiency, energy-saving hydraulic design. These pumps feature high efficiency, a wide range of performance options, safe and stable operation, low noise, long service life, and easy installation and maintenance. 2. Shaft seal: Soft packing seal or mechanical seal is used; the sealing is safe and reliable, the structure is simple, and maintenance is easy and fast. 3. Long service life of the entire unit: The shaft features a fully sealed design, which prevents it from coming into contact with the medium and thus avoids corrosion, ensuring a long service life. III. Operating Conditions Flow rate range: 6.3–500 m3/h Head range: 50–680 m Medium temperature: <+105°C Rotation speed: 1480–2950 r/min DL multi-stage centrifugal pump I. Product Overview The DL vertical multi-stage centrifugal pump has its suction and discharge ports located at the inlet and outlet sections, respectively. The rotor assembly consists of components such as the shaft, impeller, impeller sleeve, and shaft sleeve, while the inlet section, middle section, and outlet section are connected by tensioning bolts. The shaft seal is either a soft packing seal or a mechanical seal, and is lubricated and cooled by pressurized water from the balance chamber. The product complies with the JB/T2727-93 standard \"Types and Basic Parameters of Vertical Multi-stage Centrifugal Pumps\". II. Product Features 1. Novel structure and reliable operation: The balance drum (disk) has been eliminated, and hydraulic balancing is used to handle axial forces; this completely solves the problems of rusting, jamming, and wear associated with the balance drum, ensuring more reliable operation. 2. Lower operating and maintenance costs: Thanks to reliable mechanical seals, it has a low failure rate, resulting in fewer operating and maintenance expenses. 3. Smooth operation and low noise: Equipped with low-speed motors, this series of pumps features smooth operation and low noise levels. 4. Unique components for noise reduction: A unique hydraulic component design with excellent flow performance helps to minimize flow-related noise. III. Operating Conditions
Flow rate: 2–380 m³/h
Head: 5–230 m
Speed: 1480 r/min
Medium temperature: –15°C to +105°C
Ambient temperature: ≤+40°C
Maximum system operating pressure: ≤2.5 Mpa

Chemical shielded pump
I. Product Overview
The IGP vertical chemical shielded pump is a vertical pipeline-type chemical shielded pump. It consists mainly of a pump body, impeller, and shielded motor, and features a completely new static sealing structure that ensures no leakage, thus protecting the working environment from contamination ； It is mainly suitable for transporting corrosive media and media with special requirements in industries such as petroleum, chemicals, textiles and dyeing, pharmaceuticals, food, metallurgy, power plants, and nuclear energy. The product complies with the GB/T5656-1994 standard \"Technical Requirements for Centrifugal Pumps – Class II\". II. Product Features: 1. 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. 2. Static sealing structure: The motor is a shielded motor without any moving seals, ensuring complete leak prevention and protecting the working environment from contamination ； 3. Low noise: Adopting a noise-reduction design approach to minimize noise pollution; the noise level is 3–5% lower than that of conventional pipeline pumps ； 4. Easy to install and maintain: With a pipe-style design, the inlet and outlet diameters are the same and lie on a straight line, making installation and maintenance straightforward; daily upkeep is very simple ； 5. Excellent overall performance: It adopts an advanced dual-throttle ring balancing method, which provides good axial force balance, effectively reducing the motor failure rate and enhancing operational reliability ； High balance accuracy; the dynamic balance accuracy of the rotor components is at G1.0 grade ； 6. New casting process: The flow-through components of the IGP pump (such as the pump body, impeller, pump cover, seal rings, etc.) are manufactured using precision casting with silica gel. The dimensions of the flow channels remain stable. After casting, an acid washing process is used to remove any residues on the surface of the castings, preserving the true properties of the metal; thus, the presence of casting residues does not affect the medium being transported. 7. The explosion-proof motor is of the flameproof type and is suitable for use in various applications involving the transfer of flammable and explosive media. III. Operating conditions: Flow rate: 2–375 m3/h; Head: 11–88 m; Medium temperature: –50 + 95°C; Ambient temperature: ≤+40°C; Maximum system operating pressure: ≤1.2 Mpa. Diagram of the GDL multi-stage centrifugal pump structure. I. Product overview: The GDL series consists of vertical, single-suction, multi-stage centrifugal pumps with the suction and discharge ports located on the same straight line. The rotor assembly consists of components such as the shaft, impeller, impeller sleeve, and shaft sleeve, while the inlet section, middle section, and outlet section are connected by tensioning bolts. The shaft seal uses a mechanical seal, which is lubricated and cooled by pressurized water from the balance chamber. The product complies with the JB/T2727-93 standard \"Vertical multi-stage cylindrical centrifugal pumps – Types and basic parameters\". II. Product Features 1. Easy installation and maintenance: It features a pipe-type installation style, with the inlets and outlets able to be installed at any position and in any direction along the pipe, making installation and maintenance extremely convenient ； 2. Aesthetic appearance: It features a stainless steel casing and a tubular structure, giving it an attractive look ； 3. Lower operating and maintenance costs: Equipped with reliable mechanical seals, it has a low failure rate, resulting in fewer operating and maintenance expenses ； 4. Low cost: The use of high-speed motors gives this series of pumps the advantages of light weight, small size, and low cost ； 5. Unique components for reduced noise: A unique hydraulic component design combined with excellent flow performance helps to minimize flow-related noise. III. Operating Conditions Flow rate range: 1.4–194 m3/h Head range: 20–230 m Rotation speed: 2900 r/min Ambient temperature T: ≤+40°C Medium temperature: –15°C–+105°C Maximum operating pressure of the system: ≤2.5 Mpa Diagram of the IHG vertical chemical pump I. Product Overview The IHG vertical pipeline chemical pump consists of a pump body, pump cover, impeller, sealing components, etc. It is widely applicable in industries such as petroleum, chemicals, textile printing and dyeing, pharmaceuticals, food, metallurgy, and power plants for transporting corrosive media as well as media with special requirements. The product complies with the GB5656-1994 standard \"Technical Requirements for Centrifugal Pumps – Class II\". II. Product Features 1. High efficiency and energy savings: CFD computational fluid dynamics is utilized 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. 2. Mechanical seal: High-quality mechanical seals are used, and strict sealing tests are conducted upon leaving the factory to ensure the reliability of the seal. 3. Easy to install and maintain: With a pipeline design, the inlet and outlet diameters are the same and lie on a straight line, making installation and maintenance straightforward; daily upkeep is very simple ； 4. Materials: The materials used for components in contact with the medium are high-quality stainless steel (different materials can be used depending on the specific medium); they offer excellent corrosion resistance and a long service life ； 5. Excellent overall performance: It adopts an advanced dual-throttle ring balancing method, which provides good axial force balance, effectively reducing the motor failure rate and enhancing operational reliability ； It features high balance accuracy, with the dynamic balance accuracy of the rotor components at G1.0 grade. 6. New casting process: The flow-through components of IHG pumps (such as the pump body, impeller, pump cover, sealing rings, etc.) are manufactured using precision casting with silica gel. The dimensions of the flow channels remain stable. After casting, an acid washing process is used to remove any residues on the surface of the castings, preserving the true properties of the metal; thus, the presence of casting residues does not affect the medium being transported. III. Working Conditions
Flow rate: 2–375 m3/h
Head H: 11–88 m
Medium temperature: –50–+105°C
Ambient temperature: ≤+40°C
Maximum operating pressure of the system: ≤1.6 Mpa

Here is my series of articles: http://bbs.hcbbs.com/thread-1255913-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (10): Pump materials – “Improve your knowledge”
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 your knowledge”
http://bbs.hcbbs.com/thread-1255635-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (8): Oil seals – “Improve your knowledge”
http://bbs.hcbbs.com/thread-1255340-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (7): Seals – “Improve your knowledge”
http://bbs.hcbbs.com/thread-1255132-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (6): O-rings – “Improve your knowledge”
http://bbs.hcbbs.com/thread-1254912-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (5): Pump structure – “Improve your knowledge”
http://bbs.hcbbs.com/thread-1254630-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (4): Pump structure – “Improve your knowledge”
http://bbs.hcbbs.com/thread-1254625-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (3) – “Improve your knowledge”
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 your knowledge”
http://bbs.hcbbs.com/thread-1253590-1-1.html
Special lectures on rotating equipment – “Pumps”; learn something new every day (1): Pump selection – “Improve your knowledge””