Concepts NREC的动态

Centrifugal and Axial Pumps: Modern Design, Performance and Problem Solving October 21-25, 2024 8:30am-4:30pm EDT * Attend online or in person Learn the latest theories on performance, cavitation, dynamic forces, and noise. The course will review the latest advances in design tools and will provide expert and relevant instruction to designers on pump design optimization. The course begins with an extensive survey of the current technology base for pump design, covering impellers, diffusers, volutes, and other flow elements. The limitations on pump operation and range, due to stall and other instabilities, are described. Special attention is given to problems and design issues specifically associated with pump flows, namely, cavitation, unsteady flow, and vibration. The analysis of stress and vibration in centrifugal pumps will be covered in detail. Find the schedule and register today https://bit.ly/47LkQuF #pumps #pumpdesign #turbomachinery #cfd

External Gear Pump - Cavitation ?? ?? ?? Cavitation in gear pumps is a phenomenon where bubbles or voids form within a fluid due to a rapid drop in pressure below the vapor pressure, leading to subsequent collapse of these bubbles and the creation of damaging shockwaves. ? This can cause erosion and pitting on pump components like impellers and gears. Cavitation can be caused by various factors such as tank design issues, suction-line leaks, suction-line restrictions, insufficient head, air-release problems, water vapor contamination, and high viscosity of the fluid[4][5]. ?? Symptoms of cavitation include noise, vibration, reduced performance, and pitting on pump components. To prevent cavitation in gear pumps, it is crucial to select the right pump for the application, maintain proper pressure upstream from the impeller (Net Positive Suction Head), and address factors like tank design, suction-line leaks, and fluid contamination[3][4][5]. Proper installation, routine maintenance, and monitoring pressure sensing equipment are essential steps to prevent cavitation and ensure the efficient operation of gear pumps[3]. ------------EDIT------------ Conditions: - n = 500 RPM, - T = 24°C - pout = 5,5 bar, - pin = -0.7 bar Original Video by FPRG (higher quality): https://lnkd.in/eqN6ikmm (ripped from Reza Shah Mohammadi) ??Marketing for Your Business:?https://lnkd.in/eWTfgS43 #technology?#engineering?#mechanicalengineering?#physics

External Gear Pump - Cavitation ?? ?? ?? Cavitation in gear pumps is a phenomenon where bubbles or voids form within a fluid due to a rapid drop in pressure below the vapor pressure, leading to subsequent collapse of these bubbles and the creation of damaging shockwaves. ? This can cause erosion and pitting on pump components like impellers and gears. Cavitation can be caused by various factors such as tank design issues, suction-line leaks, suction-line restrictions, insufficient head, air-release problems, water vapor contamination, and high viscosity of the fluid[4][5]. ?? Symptoms of cavitation include noise, vibration, reduced performance, and pitting on pump components. To prevent cavitation in gear pumps, it is crucial to select the right pump for the application, maintain proper pressure upstream from the impeller (Net Positive Suction Head), and address factors like tank design, suction-line leaks, and fluid contamination[3][4][5]. Proper installation, routine maintenance, and monitoring pressure sensing equipment are essential steps to prevent cavitation and ensure the efficient operation of gear pumps[3]. ------------EDIT------------ Conditions: - n = 500 RPM, - T = 24°C - pout = 5,5 bar, - pin = -0.7 bar Original Video by FPRG (higher quality): https://lnkd.in/eqN6ikmm (ripped from Reza Shah Mohammadi) ??Marketing for Your Business:?https://lnkd.in/eWTfgS43 #technology?#engineering?#mechanicalengineering?#physics

External Gear Pump - Cavitation ?? ?? ?? Cavitation in gear pumps is a phenomenon where bubbles or voids form within a fluid due to a rapid drop in pressure below the vapor pressure, leading to subsequent collapse of these bubbles and the creation of damaging shockwaves. ? This can cause erosion and pitting on pump components like impellers and gears. Cavitation can be caused by various factors such as tank design issues, suction-line leaks, suction-line restrictions, insufficient head, air-release problems, water vapor contamination, and high viscosity of the fluid[4][5]. ?? Symptoms of cavitation include noise, vibration, reduced performance, and pitting on pump components. To prevent cavitation in gear pumps, it is crucial to select the right pump for the application, maintain proper pressure upstream from the impeller (Net Positive Suction Head), and address factors like tank design, suction-line leaks, and fluid contamination[3][4][5]. Proper installation, routine maintenance, and monitoring pressure sensing equipment are essential steps to prevent cavitation and ensure the efficient operation of gear pumps[3]. Conditions: - n = 500 RPM, - T = 24°C - pout = 5,5 bar, - pin = -0.7 bar Original Video by FPRG (higher quality): https://lnkd.in/eqN6ikmm ?? Latest newsletter: https://lnkd.in/d7B7fqA #engineeredmind?#science?#technology?#engineering #cavitation

???????????????????? ???? ?????????????? ????????????: Cavitation occurs when fluid pressure drops below vapor pressure, forming vapor bubbles that collapse and cause noise, vibration, and damage. Causes: 1. Pressure Drop: Significant drop in pressure. 2. High Flow Velocities: Leads to pressure drop. 3. Fluid Properties: High vapor pressure fluids are more prone. 4. Valve Design: Some designs induce higher pressure drops. Effects: 1. Noise and Vibration: Bubble collapse causes noise and vibration. 2. Erosion: Shock waves erode valve and piping. 3. Reduced Performance: Decreases control accuracy and efficiency. Minimization: 1. Valve Design: Use cavitation-resistant valves and anti-cavitation trims. 2. Pressure/Flow Control: Reduce pressure drop and control fluid velocity. 3. System Design: Use multiple valves or flow restrictors. 4. Fluid Properties: Adjust properties or use de-aerators. 5. Correct Valve Sizing: Ensure proper sizing. #controlvalve #cavitation #chemicalengineering #pressuredrop #fluidflow

Cavitation can also occur in dam spillways when overhead water projection prabol not allign with cross section of spillway.

What is Globe Valve? How does it Work? A globe valve is a type of valve used to regulate the flow of fluids in a pipeline. Its design features a movable disk-type element and a stationary ring seat in a generally spherical body. When the disk (plug) moves perpendicularly to the seat, it allows, restricts, or stops the flow, making it useful for throttling purposes. Globe valves are known for their good shut-off capabilities and are commonly used in systems where precise flow control is needed. A globe valve works by using a movable disk or plug to regulate flow through the valve body, which has a spherical shape. Here’s how it operates: 1. **Open Position**: When the valve is fully open, the disk or plug is lifted away from the seat, allowing fluid to pass through with minimal resistance. 2. **Throttling Position**: By partially raising or lowering the disk, the valve can adjust the flow rate. This position allows precise control of fluid flow. 3. **Closed Position**: When the disk is fully lowered onto the seat, it blocks the flow completely, effectively stopping fluid movement. The globe valve's linear motion and flow path create resistance, making it effective for applications where throttling and precise control are necessary. The handwheel or actuator that operates the valve stem adjusts the disk's position to control flow.

Liquid Controls positive displacement meters are engineered to provide an accurate, trouble-free service life requiring minimal maintenance.?The unique?construction of the LC meters results in low pressure drop for most liquids, delivering superior performance and minimal demand on system pumps. The exclusive LC metering element eliminates inaccuracies, minimizes loads on bearings, and performs equally in forward or reverse flow.?The tri-rotor meter design consists of a precision machined housing in which three rotors turn and measure fuel in synchronized relationship, with no metal-to-metal contact, providing a lifetime of sustained measurement accuracy.Because the force exerted by the fluid flowing through the meter is at right angles to the faces of the displacement rotors and the rotor shafts are always in a horizontal plane, there is no axial thrust, thereby eliminating wear between the rotors and the bearing plates and ultimately providing a lifetime of measurement accuracy!

Once the index route is identified ... make node diagram for the index route .. it is important to identify the duct element along the index duct route Watch this step by step tutorial for ESP calculation for?Parking Exhaust fan https://lnkd.in/d8huRQNm #fan_ESP?#pressure_loss_in_air_ducts?#ESP_spreadsheet_calculator?#duct_fittings_pressure_loss?#extetnal_static_pressure?#hvac?#mechanicaldesign?#ESP_calculations?#ESP?#externalstaticpressure?#MEP?#DUCT?#FCU?#FAHU?#AHU?#MECHANICAL?#FrictionLoss?#ventilation?#AirDuctPressureLoss?#ashrae?#ASHRAE_Duct_Fitting_Database?#hvacr?#hvac_design?#espcalculation?#pressure_drop?#pressuredrop #duct_pressure_drop #ductpressuredrop

Small Project: How to design Centrifugal Pump #ZW3D; #ZW3D_Centrifugal_Pump