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| No.13685048
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Information Name: | GDL vertical multistage centrifugal pipeline |
Published: | 2015-04-05 |
Validity: | 90 |
Specifications: | |
Quantity: | 566.00 |
Price Description: | |
Detailed Product Description: | One, GDL vertical multistage centrifugal pipeline Overview: GDL vertical multistage centrifugal pump piping system reference design and manufacture of advanced products. Impeller, diffuser and diversion shell made of stainless steel sheet metal stamping, drawing, welding, forming, using carbide mechanical seal and guide bearing. With small size, light weight, high efficiency, energy saving, low noise and smooth operation, long life, vertical installation, small footprint, notable features such as light weight and appearance, is the ideal replacement products. GDL vertical multistage centrifugal pump for high pressure pipeline system to transport water or run the physical and chemical properties of liquids, such as high-rise building water supply, boiler feed water, fire protection systems, such as transportation or pressurization purposes. GDL vertical multistage centrifugal pump with the overall pipeline steel (ZG1Cr18Ni9Ti) material, suitable for chemical, food, brewing, pharmaceutical, textile and other industries. Can be customized according to user requirements 306 or 316L stainless steel. ; Centrifugal pump is generally driven by an electric motor, before starting the pump, the pump and suction line filled with liquid. When the impeller rotates at high speed, the impeller vanes to drive the liquid along the rotation, due to centrifugal force, the liquid left behind the impeller tip (flow rate may be increased to 15 ~ 25m / s) from the center of the impeller, kinetic energy increases. When the liquid enters the pump housing, since the volute casing of the pump flow path is gradually expanded, the liquid flow rate decreases, a part of the kinetic energy into static pressure energy, so a relatively high pressure along the liquid discharge port flows. At the same time, the center of the impeller due to the liquid being thrown out and create a vacuum, and the pressure Pa at the liquid surface is higher than that at the center of the impeller, therefore, the liquid in the suction line of the pressure differential into the pump. Constantly rotating impeller, the liquid is drawn and continuously pressed out. Due to centrifugal liquid was able to transport, mainly by centrifugal force, it is called centrifugal pump. Centrifugal pumps in the most widely used in chemical production, which is due to its wide range of performance applicable (including flow, pressure head and adaptive nature of the medium), small size, simple structure, easy operation, uniform flow, less failure, life long, acquisition costs and operating costs are low and other advantages. Thus, this chapter will centrifugal fluid mechanics as a typical example of the application to be highlighted. A. Centrifugal discuss the basic structure and working principle of centrifugal basic structure and operating principle, to closely link the kinetic energy is converted to static pressure energy efficient this topic to expand the basic components (a) The basic structure of the centrifugal pump is centrifugal pump High-speed rotation of the impeller and fixed snail-shaped casing. Has several (usually 4 to 12) after the curved blade impeller fastened to the pump shaft, the pump shaft and driven by a motor with a high speed rotation. The impeller is directly acting on the liquid within the pump member, means for energizing the centrifugal pump. The central pump housing inlet and is connected to the suction pipe, the bottom end of the suction pipe is provided with a one-way valve. Outlet and is equipped with regulating valve is connected to the pump discharge line next to the shell side. (B) of the centrifugal pump works when the centrifugal pump starts, along with high speed shaft driven impeller rotation, forcing the pre-filling liquid between the blades rotate, the role of the centrifugal force of inertia, center of liquid from the impeller radially outward Week movement. During movement of the liquid flowing through the impeller to obtain the energy can be increased static pressure, the flow rate increases. When the liquid leaves the impeller into the pump casing, because of the gradual expansion of the shell and deceleration flow path, part of the kinetic energy into static pressure energy, and finally tangentially flows into the discharge line. So volute casing pump impeller is not only a collection of parts out of the liquid, and also a transfer energy device. When rejection of liquid from the center of the impeller toward the outer periphery, while a low pressure zone formed at the center of the impeller, under the action of the liquid level in the sump and the total potential difference between the center of the impeller, such that fluid is drawn into the impeller center. Relying on continuous operation of the impeller, the liquid will be continuously suction and discharge. Mechanical energy in centrifugal liquid obtained a final order to improve the performance of static pressure energy. The basic structure and working principle of centrifugal pumps [animation] need be emphasized that, if not filled with liquid to be transported to the centrifugal pump housing before the start, due to the low air density, small centrifugal force produced by the rotation of the impeller, the impeller center District insufficient to form a low pressure liquid suction tank, so although it can not transport liquid centrifugal start. This indicates that no self-priming centrifugal pump capacity, this phenomenon is called gas tied. Suction line installation in order to prevent a one-way valve at the end before the start of poured liquid flow from the pump housing shell. Air from the intake pipe into the pump housing will cause gas tied. (C) the centrifugal impeller and other parts of the company related products: vacuum pumps, submersible mixers, vacuum unit, pneumatic diaphragm pump, pump, submersible pumps, magnetic pumps, centrifugal pumps, multistage pumps, diaphragm pumps, deep well pump, single screw pump, submersible propeller pumps, centrifugal pumps. 1. Centrifugal impeller; centrifugal impeller is a key component. (1) according to their mechanical structure can be divided into closed, semi-closed and open three. Closed impeller for conveying the cleaning liquid; semi-closed and open impeller for conveying a suspension containing solid particles, the low efficiency of such pumps. Closed and semi-closed impeller is in operation, high pressure fluid leaving the impeller part may leak into the cavity between the impeller and the pump casing, the front side of the liquid by the impeller suction port of the low pressure, so the liquid acting on the front wheel, rear pressure side of the range, they had to point the inlet side of the impeller axial thrust. The force pushing the inlet side of the impeller to move, causing the impeller and casing wear at the contact, resulting in severe vibration of the pump, disrupt the normal operation of the pump. In the impeller rear cover several drilled holes, reducing the pressure on both sides of the impeller difference, thereby reducing the adverse effects of axial thrust, but also reduces the efficiency of the pump. These holes are called balance hole. (2) by pipetting in different ways can be divided into simple single-suction impeller with two double-suction, single-suction impeller structure, fluid sucked from one side only. Double suction impeller simultaneously from both sides of the impeller symmetrically inhalation liquid, which not only has a large liquid absorption capacity, and essentially eliminates the axial thrust. (3) According to the geometry of the impeller blades, the blades can be divided into backbends, forward curved radial and three, because of backward curved blades in favor of converting the kinetic energy of the liquid static pressure energy, and therefore are widely used. 2. Energy loss due to the impact of the centrifugal pump impeller left guide wheel to reduce the liquid directly into the pump casing caused between the impeller and the pump casing sometimes means a stationary blade and with a guide wheel. Guide wheel blades in the liquid entering the pump housing and to gradually shift the continuously increasing flow path, so that part of the kinetic energy is efficiently converted to static pressure energy. Multi-stage centrifugal pumps are usually installed guide wheel. Snail-shaped pump casing, back curved blade impeller and guide wheel can improve the static pressure energy to kinetic energy conversion rate, it can be regarded as energy transfer devices. 3. Due to the rotation of the shaft seal device stationary pump housing, contact the shaft and the pump housing must have a certain gap. In order to avoid the high pressure liquid pump leakage along the gap, or to prevent outside air from entering the pump from the opposite direction, the shaft sealing device must be set. Centrifugal pump shaft seal device has a stuffing box and mechanical (end) seal. Stuffing is the shaft through the casing annulus seal made, in which the soft filler loading (such as oiled or coated graphite asbestos rope, etc.). By a mechanical seal is mounted on the shaft of the ring and the other fixed to the pump housing stationary ring constituted. The end face of the ring by spring force two snapping and rotated relative to each other, played a role in sealing. Mechanical seals suitable for high sealing applications, such as transportation acid, alkali, flammable, explosive and toxic liquids. When the centrifugal pump starts, along with high speed shaft driven impeller rotation, forcing the pre-filling liquid between the blades rotate, the role of the centrifugal force of inertia, center of liquid from the impeller radially outward movement of weeks. During movement of the liquid flowing through the impeller to obtain the energy can be increased static pressure, the flow rate increases. When the liquid leaves the centrifugal pump impeller into the shell, the shell due to the gradual expansion of the flow channel is decelerated, the kinetic energy into static pressure energy part, and finally tangentially flows into the discharge line. So volute casing pump impeller is not only a collection of parts out of the liquid, and also a transfer energy device. When rejection of liquid from the center of the impeller toward the outer periphery, while a low pressure zone formed at the center of the impeller, under the action of the liquid level in the sump and the total potential difference between the center of the impeller, such that fluid is drawn into the impeller center. Relying on continuous operation of the impeller, the liquid will be continuously suction and discharge. Mechanical energy in centrifugal liquid obtained a final order to improve the performance of static pressure energy. Impeller role is the original motivation of the mechanical energy directly to liquid, liquid to increase static pressure energy and kinetic energy (mainly to increase static pressure energy). 1. The role of the impeller wheel is the original motivation of the mechanical energy directly to the liquid, the liquid in order to increase static pressure energy and kinetic energy (mainly to increase static pressure energy). Impeller open, half-closed and closed three. Open impeller blades no cover on both sides, create a simple, easy to clean, suitable for handling materials containing larger amounts of suspended solids, low efficiency, transmission fluid pressure is not high; semi-closed impeller without cover at the inlet side board, and on the other side of the cover for easy transport or materials containing precipitate particles, efficiency is low; closed impeller impeller blades on both sides front and rear cover, high efficiency, suitable for conveying impurities cleaning liquid. General centrifugal impeller much as such. 2. The role of the impeller casing enclosed in a certain space, and in order to press out liquid from the suction of the impeller. Centrifugal pump volute casing made more, so called volute. Since the flow path cross-sectional area gradually expanded, so that around the impeller thrown from a high-speed liquid gradually reduce the flow rate, so that part of the kinetic energy is efficiently converted to static pressure energy. Pump housing not only brings together liquid thrown by the impeller, but it is also an energy conversion device. The concept is in fact object centrifugal inertial centrifugal performance, such water droplets on the umbrella when the umbrella is rotated slowly, the water droplets will follow the rotation of the umbrella, the umbrella with water droplets because the frictional force to the centripetal force as droplets dictates. However, if the umbrella is rotated accelerate the friction enough to make the water droplets in a circular motion, then drops off the outside edge of the umbrella movement. Like with a rope pulling stones in a circular motion, if the speed is too fast, the rope will be disconnected, stone block will fly. This is the so-called centrifugal. Centrifugal pump design is based on this principle. Impeller blades rotating at high speed rotation driven water, the water thrown, so as to achieve the purpose of transportation. There are a good variety of centrifugal pumps from the use can be divided into civil and industrial pumps, from the transport medium can be divided into clear water pump, trash pump, corrosion resistant pumps and so on. The basic structure of the basic structure of the centrifugal pump is a centrifugal pump consists of six parts, namely: impeller, pump, pump shaft, bearings, seal rings, stuffing box. 1, is a core part of the centrifugal impeller, which speed and high output power, the blades on the impeller also played a major role in the assembly before the impeller through the static equilibrium experiments. The inner and outer surfaces of the impeller required to be smooth to reduce flow friction losses. 2, pump, also known as the pump casing, which is the main water pump. Fixed play a supporting role, and connected with the installation of the bearing bracket. 3, the role of the pump shaft and the motor is connected by the coupling, the torque transmitted to the motor impeller, so it is the transmission of the main part of mechanical energy. 4, the bearing sleeve is supported on the pump shaft in the pump shaft member, there are two kinds of rolling bearings and sliding bearings. Rolling refuel using butter as a lubricant to the appropriate volume is generally much 2/3 3/4 may have a fever, there are too few sound and heat! Centrifugal sliding bearing structure is used as a lubricant of a clear oil, fuel oil level line. Too many to be leaking oil along the shaft and drift *, but also too little bearing overheating burn accident! The pump during operation of the bearing maximum temperature of 85 degrees in the general run at about 60 degrees, and if necessary to find the cause of high (if there are impurities, oil is black, is water) and timely manner! 5, sealing ring, also known as reduced leakage ring. Resulting in a gap over the General Assembly and the casing between the impeller inlet water pump high-pressure zone of low pressure area flows through this gap, the impact of the pump out the water, reducing efficiency! The gap is too small will cause the impeller and the pump casing friction wear. In order to increase resistance to reduce the internal leakage reflux, delaying the impeller and pump casing life, provided with a sealing ring in the pump casing and the impeller aid junction edge seal gap is maintained between 0.25 ~ 1.10mm is appropriate. 6, stuffing consists of packing, lantern ring, packing tube, packing gland, seal tube. The main role of the stuffing box is empty in order to be closed, let the water flow from the pump shaft between the pump casing and does not flow out to not let outside air into the pump. Always keep the vacuum pump inside! When the shaft and packing friction heat to rely on the seal to seal the circle take control of water to cool the filler! Maintain the normal operation of the pump. Therefore, the inspection process is running tour of inspection of the pump stuffing is particularly pay attention! 600 hours running around going on packing replacement. Two, GDL vertical multistage centrifugal pump pipe Features: 1, GDL vertical pipeline multistage centrifugal pump for the vertical structure, with a small footprint characteristics, GDL vertical multistage centrifugal pipeline coincides with the center of gravity pump foot center, which is running smoothly, small vibration, long life. 2, GDL vertical multistage centrifugal pump pipe the same diameter and the center line at the same level, without changing the structure of the pipe can be installed directly on any part of their pipeline, the installation is very easy. 3, plus rain cover can be placed directly on the motor for outdoor use, but without the construction of GDL vertical multistage centrifugal pump room piping, significant savings in capital investment. 4, GDL vertical pipeline multistage centrifugal pump head can to meet different requirements by changing the pump stages (impellers number), it is a wide scope of application. 5, seal with carbide mechanical seal, three, GDL vertical multistage centrifugal pipeline Usage: GDL vertical pipeline multistage centrifugal pump is particularly suitable for boiler feed water, can also be widely used in water supply pressure vessels, heat water cycle, high-rise building water supply, irrigation, fire booster, water washing, food, brewing, pharmaceutical, chemical, aquaculture, environmental protection, chemical processes and tools supporting other industries, as the water supply and drainage of power equipment. Four, GDL vertical multistage centrifugal pipeline structure: five, GDL vertical multistage centrifugal pipeline operating conditions: a) GDL vertical multistage centrifugal pipeline can transport water or physical and chemical properties similar to water liquid; b) Temperature range: -15 ℃ ~ + 120 ℃; c) Working pressure: up to 2.5MPa, that system pressure = inlet pressure + pressure when the valve closing work <; 2.5MPa; temperature d) of the surrounding environment should be lower at 40 ℃, relative humidity less than 95%; e) When transporting hot liquids and corrosive media, please when ordering raised to the use of special materials to meet the requirements. Six, GDL vertical pipeline multistage centrifugal pump Model significance: For example: 80GDL36-12X5 80- and export Diameter (mm) GDL- vertical multistage centrifugal pipeline 12- single stage lift (m) 36- point nominal design flow (m3 / h); |
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Copyright © GuangDong ICP No. 10089450, Fluid Technology Co., Ltd. Shanghai Wang Chung All rights reserved.
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You are the 5498 visitor
Copyright © GuangDong ICP No. 10089450, Fluid Technology Co., Ltd. Shanghai Wang Chung All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility