Overview of single-screw pumps

Overview of single-screw pumps

Single screw Submersible Pump work with a certain appearance in the corresponding surface of the rotor within the stator inner surface meshing, the formation of special contact line, so that the stator cavity separated, this contact line, said sealing line. When the rotor rotates by a certain path, the sealing line to do axial movement, but also to allow the stator cavity axial movement to do, namely, volume displacement, then sealed in one end of the line disappeared, and from the other end to generate new sealing line, followed by the media from one end into the other side.

Single-screw type oil mixing pump for use with a good flexible rubber material of the stator, rotor meshing with the need for a certain amount of interference, to produce a reliable seal. When the pump is working effectively sealed to prevent gas line through, so as to achieve the purpose of conveying gas; when the medium contains solid particles, if the solid particles in a sealed squeeze line, because the role of the rubber elasticity of the stator the stator rubber surface is compressed, solid particles across the seal line, the stator rubber rebound to restore the original shape. Thus, a single screw Boosting Pump can achieve transmission medium containing traces of solid particles purposes.

General nature of a single screw transmission medium, the state is more complex, can cause blockage in the pipe. Due to the type of single screw pump is positive displacement pump, when a blockage or human error, it will cause over-pressure pump , it is easy to damage its components. To prevent damage to the pump must discharge pipe to the pump suction pipe installed between the safety valve. Can also be installed in the outlet line pressure switch, the pump pressure rated pump stops automatically when the alarm.

In the actual design of single screw Water Pump gas mixed transportation process, it should be according to the specific circumstances of the oil region, a comprehensive analysis of the amount of gas mixed transportation, oil and gas production, oil and gas ratio, the oil back pressure, transmission distance and other factors, many of the research, comparative analysis of multi-program, select the appropriate mixing pump type, and work out a reasonable process layout, in order to achieve gas mixed transportation safety, scientific, reliable and economical operation.

19/05/2012 – 15:40 Categories: Boosting Pump | Post a comment

Why is that selection is more important than the calculated of Ball Valves ?

Why is that selection is more important than the calculated of Ball Valves ?

For ball valves Calculation and selection of comparison, the selection is much more important, much more complex. Because the calculation is a simple formula, which itself is not accurate formula, but rather the process parameters given is accurate. More related to the content selection, a little mistake, it will lead to improper selection, not only cause human, material and financial resources to waste, and use the effect is not satisfactory, bring some with problems, such as reliability, life, running quality.

Stainless steel under certain conditions will be rusty. Stainless steel has the ability to resist atmospheric oxidation of stainless steel — that is, but also with the acid, alkali and salt corrosion medium capacity – that is corrosion resistance. However, the size of its corrosion resistance is with its own chemical composition of steel, plus each state, using the media type and environmental conditions change. Such as the 304 steel, in a clean dry atmosphere, there is absolutely excellent anti-corrosion ability, but will move it to the waterfront, contains a lot of salt in the sea mist, soon rusted; and 316 steel is manifested is good.

So it is not any kind of Stainless Steel Ball Valve , the corrosion capability under any circumstances, does not rust.
Stainless steel is by its very thin surface layer of fine solid and stable chromium-rich oxide layer (protective film), to prevent the continued infiltration of oxygen atoms, to oxidation, and access to anti-corrosion ability. If there is some reason, this film was the constant destruction, air or liquid oxygen or metal atoms will continue to penetrate the iron atom out from the constant analysis of the formation of loose iron oxide, metal surface corrosion will be constantly .

Metal Seat Ball Valve,Inflation, inflation, valve manufacturers must purchase accessories, such as steel, rubber prices have increased accordingly, in the range between 5% -35% to 35% range it could be called “surge.” Chain is usually the source of prices will directly cause the entire chain of price rise up the ladder, but the valve itself, the price is not low end, the major dealers are in that price. If a company then raised ex-factory price, the enterprise will inevitably lead to reduced market share, however, if you do not increase the price, not to protect the interests of manufacturers, no interest, no creativity, no creativity, no business development, will surely come true “small businesses easily eliminated in inflation” argument.

 

 

 

19/05/2012 – 15:35 Categories: Ball Valves | Post a comment

The advantages of Brushless motors

The advantages of Brushless motors

Brushless motors with a fast response, large starting torque, from zerospeed to rated speed with rated torque can provide the performance, but the advantages of DC motor is also itsdisadvantage, since DC Confidential produce constant rated loadtransfer moment of performance, the armature and the rotormagnetic field required to maintain constant 90 °, which would beby brush and commutator. Carbon brush and commutator in the motor rotation will produce sparks, so in addition to the tonercomponents may cause damage, the use of limited occasions.

Stepper Motors involves a lot of expertise .

Stepper motor does not like a normal DC motor, AC motor usedin routine. It must be double-ring pulse signal, power driver circuit composed of the control system can be used. Now more commonly used, including stepper motor stepper motorreaction (VR), permanent magnet stepper motor (PM), hybridstepper motors (HB) and single-phase stepper motors.

Motor  can also use other energy sources .

Hydraulic motor is also known as motor oil, mainly used ininjection molding machinery, ships, etc. from Yang. From the perspective of energy conversion, hydraulic pump and hydraulic motor is reversible work of hydraulic components,hydraulic fluid input to the work of any kind, can make into ahydraulic motor operating conditions; the other hand, when thehydraulic motor-driven rotary torque from the outside spindle, the hydraulic pump can be changed working conditions. Because they have the same basic structural elements - closed, but you cancycle the amount of oil and the corresponding institutions.

 

19/05/2012 – 15:30 Categories: Electric Motors | Post a comment

Screw locking sleeve causes and solutions

Screw locking sleeve causes and solutions

Rotary screw pumps are used to suction the liquid, due to the mutual engagement of the screw and the screw and tube wall lining closely with the electric fuel pump between the suction and outlet, will be separated into one or more confined space. And engagement with the screw rotation, which seals in the pump suction side space evolving, the suction chamber which enclosed the liquid, and along the screw axis from the inhalation chamber continuously push to move the discharge side, will be closed in the space constantly in the discharged liquid, like a nut when the screw rotation case continue to move forward, as this is the basic principle of the screw pump.

Screw work, after the liquid is sucked into the Alternator Vacuum Pump casing with threaded seal enclosed space, when the active screw rotates, the screw seal volume increase in the screw thread of the extrusion pressure, and along the axis to move. As the screw is a constant rotation, so the liquid out-flow is uniform. Analysis of media by locking screw shaft sleeve and speed of clearance requirements, proposed solutions to solve the rectification of locking sleeve. Proven after transformation parameters of all the normal equipment operation.

According to the work of bearing the general bush hole and the shaft with a clearance fit, the shaft and bushing parts diagram on the size of aperture bias, is generally based on average operating temperature at 20 鈩� to ensure shaft and bushing hole with a reasonable gap between changes determined. Bearing overheating failures affect many factors in the bearing structure design, material selection, right circumstances, bearing overheating is mainly the size of the bearing radial clearance, and improper assembly caused by improper use.

Bearing radial clearance of bearing overheating failures, bearing radial clearance is the journal diameter bearing bore diameter and the difference of the screw Vortex Pumps bearing radial clearance to leave some of its functions as follows: to achieve activities connected with the bearing axis minimum conditions; is to control the operation of the shaft to ensure accuracy; is an important condition for the formation of liquid lubrication. Therefore, the radial bearing clearance is very important, too big or too small are extremely harmful. The gap is too small, difficult to form a lubricant film, the friction heat can not easily be taken away, so that the bearing overheating, and in severe axle; the gap is too large, the film is difficult to form, will reduce the accuracy of the machine running, will have severe vibration and noise, and even lead Burnt accident.

 

 

 

 

 

18/05/2012 – 06:47 Categories: Pump | Post a comment

High Pressure Ball Valves still need import?

High Pressure Ball Valves still need import?

Water supply network in the ball valves , past the valve body, valve cover, the majority of variable speed gearbox material is gray cast iron, ductile iron part. View of the pipe, are promoting the use of ductile iron pipe fittings, valves, material should be so. Thereby enhancing the quality of the casting, and reduce the weight of the valve, in particular, should be used first ball valve plate iron (QT405-10).
It should be noted, due to various body parts of varying thickness, the difficulty of casting ball is larger, should be the appropriate measures to ensure the quality of castings. Recommended that manufacturers establish a strict quality control system, for the larger number of small-diameter valve using lost foam method modeling, large-diameter valve resin sand molding, casting and require proper and effective measures to eliminate stress, promote clean shot measures of sand. Casting defects, does not allow use of welding methods to eliminate, or welding should take measures to eliminate the formation of internal stress, a more rigorous test, explain the situation to the user.

Metal Seat Ball Valve is a good choice.

In order to open and close the hand or light equipment, work under pressure in the valve opening and closing torque 鈮� 240N 鈥� m, that is, a person can operate.
First, the valve manufacturer to optimize the design of the valve structure to improve the combination of the concentric parts, moving parts contact surface finish, reducing the gate resistance. If only by the gear ratio transmission gearbox to increase the number of revolutions of the hoist way to reduce the opening and closing torque is not ideal. To this end, mechanical processing means updates can not be ignored, such as to improve the quality of machining, with a computer-controlled machine tools and machining centers.

Often appear in the drip valve stem seal packing, especially for large-diameter valve packing maintenance and water, is expensive. Therefore, for improving the durability of seal packing is necessary, appropriate use of materials on the one hand, not easy to aging, wear very little filler required two aspects, combined with the pipe network in a limited number of valve opening and closing, should not seek to replace the decades as well.

So High Pressure Ball Valves need a hign quality

 

18/05/2012 – 06:46 Categories: Ball Valves, Valves | Post a comment

The advantages of Brushless motors

The advantages of Brushless motors

Brushless motors with a fast response, large starting torque, from zerospeed to rated speed with rated torque can provide the performance, but the advantages of DC motor is also itsdisadvantage, since DC Confidential produce constant rated loadtransfer moment of performance, the armature and the rotormagnetic field required to maintain constant 90 °, which would beby brush and commutator. Carbon brush and commutator in the motor rotation will produce sparks, so in addition to the tonercomponents may cause damage, the use of limited occasions.

Stepper Motors involves a lot of expertise .

Stepper motor does not like a normal DC motor, AC motor usedin routine. It must be double-ring pulse signal, power driver circuit composed of the control system can be used. Now more commonly used, including stepper motor stepper motorreaction (VR), permanent magnet stepper motor (PM), hybridstepper motors (HB) and single-phase stepper motors.

Motor  can also use other energy sources .

Hydraulic motor is also known as motor oil, mainly used ininjection molding machinery, ships, etc. from Yang. From the perspective of energy conversion, hydraulic pump and hydraulic motor is reversible work of hydraulic components,hydraulic fluid input to the work of any kind, can make into ahydraulic motor operating conditions; the other hand, when thehydraulic motor-driven rotary torque from the outside spindle, the hydraulic pump can be changed working conditions. Because they have the same basic structural elements - closed, but you cancycle the amount of oil and the corresponding institutions.

 

18/05/2012 – 06:44 Categories: Motor | Post a comment

Pneumatic diaphragm pumps for occasions

Pneumatic diaphragm pumps for occasions

As the pneumatic diaphragm pump with the above characteristics, so since the birth of the diaphragm in the world since the pumps are gradually into other markets, and occupies part of it. Such as: painting, ceramics in the diaphragm has an absolute dominant position, while in some other industries, such as environmental protection, wastewater treatment, construction, sewage, Fine Chemicals is expanding its market share, and can not be replaced with other pump position. The advantage of pneumatic diaphragm pumps:

As with air-powered, so flow with back pressure (outlet resistance) automatically adjust to changes, suitable for high viscosity fluids. The water pump operating point is set as the base good, if slightly higher for the viscosity of the fluid, you need to complete reducer,Hydraulic Valves or frequency converter, the cost will be greatly improved, and the gear pump is the same.

In an explosive environment with reliable and low cost air pump, such as fuel, gunpowder, explosives delivery, because: first, grounded not produce sparks; Second, the work is no heat generated, the machine will not overheat ; third, the fluid does not overheat because the smallest diaphragm stir the fluid. Bad place at the site, such as construction sites, industrial and mining wastewater, due to impurities in the water and are complicated, easy to plug the pipe, so that the load is too high for the pump to form the situation of vulnerable motor heat. Particles and air flow through the diaphragm adjustable, stops automatically when the pipeline to clear blockage.

Another small diaphragm pumps easy to move, without foundation, representing the ground is extremely small, easy to install and economical. Materials can be used as portable pumps. In a hazardous, corrosive materials, processing, diaphragm material can be completely separated from the outside world. Or the number of trials to ensure that no impurities contamination of raw materials. Can be used to transport relatively unstable chemical nature of the fluid, such as: photographic materials, flocculation and solutions. This is because the diaphragm of the shear stress is low, little effect on the physical.

16/05/2012 – 08:54 Categories: Pump | Post a comment

Talk about Butterfly valves

Talk about Butterfly valves

China is becoming the world’s largest plant, oxygen valves, brass valves and valve products, manufacture various types of face even greater space for development can be seen, as long as companies can seize opportunities, strengthen research and development, constantly improving product scientific and technological content and quality of products, you can in the fierce competition in the market to gain the initiative. Jinxiang valve while the valve manufacturing company will seize the good in every aspect, earnest service every customer!

Butterfly valves, its key components against the wind like butterflies, hovering at ease. Butterfly valve is the valve disc, valve seat, a coil axis of rotation, size, rotation angle, is the degree of valve opening and closing. The characteristics of butterfly valves with a light, valves to be frugal than other data, construct a simple, open and close too fast, cut off and throttling can be used, fluid resistance, the operation effort. Butterfly valve, can make a great caliber. You can use the central valve is best not to make the valve, butterfly valve because the economy than the gate, and a good tune rational. Currently, the butterfly valve in the hot water piping to be universally used.

Ball Valve works by love to make the valve rotary valve flow or occlusion. Valve switch heavy, small, can make a great caliber, reliable sealing, simple structure, maintenance, lunch, often with the spherical sealing surface in the closed state, the media can not easily be eroded, in all industries are used. Two types of ball valves, floating ball first, second, a fixed ball.

Butterfly valve opening and the relationship between flow rate, essentially linearly proportional to the change. If used to control the flow, its flow characteristics and flow resistance of piping is also closely related, such as the installation of the valve bore two pipelines, all forms of the same, but different loss coefficient pipe, valves, flow difference will be great. 顎�
If the throttle valve in a significant reduction in the state, the valve plate on the back prone to cavitation, may damage the valve, generally used in a 15 掳 outside. 顎�
Stainless Steel Ball Valve in the opening, the valve body and disc shape of the front-end to form an opening to the valve shaft as the center, on both sides to complete the formation of different states, the front side of the disc moving along the flow direction, the direction of the other side of the counter-current water the move, therefore, the side of the valve body and valve plate-shaped nozzle openings formed like the other side of the similar-shaped orifice opening, the nozzle side than the expenditure side of the flow much faster, and throttle valve below will produce negative side often there will be the rubber seals off. 顎�

16/05/2012 – 08:53 Categories: Valves | Post a comment

Combustion efficiency of the motor

Combustion efficiency of the motor

Assuming access to gasoline combustion cylinder, the fuel of carbon atoms and hydrogen atoms completely oxidized to produce carbon dioxide (CO2) and water (H2O), the Industrial Electric Motor is practically impossible to reach this level. For various reasons, the internal combustion engine is not enough, it will inevitably produce unburned hydrocarbons (CH), so that gasoline can not be completely released from the heat. General is often used to evaluate the combustion efficiency and combustion quality. Among them, the combustion chamber shape, performance carburetor, ignition system performance, intake and other factors have a direct impact on the efficiency of the engine’s combustion efficiency.

The Electric Motor through a wide range of energy consumption and transmission losses, and the rest to drive the motorcycle motivation is extremely limited. The purchase of a certain type of motorcycle, its engine and transmission efficiency of the structure has the basic shape. To take full advantage of the engine’s limited power, we must learn in the course of the proper use and timely maintenance.

Not all of the internal combustion engine heat into useful work, and only a small part in promoting the piston-driven approach to the open atmosphere to the crankshaft rotation, part of the exhaust heat, this energy loss as part of the exhaust losses, the exhaust loss% the total energy of about 40. Intake and exhaust loss is generally believed that the so-called pumping loss textbooks. Typically, when the piston reaches bottom dead center before the exhaust valve must be opened in advance, if you do not advance the exhaust valve opens, the cylinder gas pressure can still push the piston down.

Must be part of the cooling, need layout, radiator and oil cooler cooling fan Electric Motor, using cooling devices to cool the engine, and eventually released into the atmosphere in the heat. Under normal circumstances, about 20% of the total energy of the cooling capacity loss.

16/05/2012 – 08:45 Categories: Motor | Post a comment

Pump operating requirements and technical requirements

Pump operating requirements and technical requirements

Check the stuffing: stuffing seal the Boosting Pump when the elastic filler should be noted, too loose too much impact on leakage performance, in the normal, the amount of leakage should be about 60 drops per minute, drip of normal, not normal splash around

Check the mechanical seal: mechanical seal in the pump, the case should not operate without water, can be used only when debugging the moment to move, the mechanical device in normal operation there will be a small amount of water dripping from the retaining ring out before, when the amount of leakage than the for a long time, check friction ring, repair or replace the mechanical seal life under normal conditions of 8000 hours, usually do not have to be replaced as long as the entire exchange ring and friction ring on the stationary ring that can be

Lubricated bearings: This series of Water Pump imported SKF bearings and a half closed, the factory has added high-temperature grease, after 2 years of continuous operation, the need to add grease once a year after

Check the impeller clearance: Under special circumstances, pneumatic diaphragm pump impeller damaged or rolled into a foreign body, need cleaning up, you need to remove the bearing body and end caps, shaft and impeller to pull back, out of the water pump and do not have dismantled over.Check the wear parts: the main Centrifugal Pump wear parts including flexible couplings, mechanical seals, static ring, O-rubber roll, bearings, impeller nut, packing plate, etc., Maintenance should pay attention to careful examination, should be replaced if damaged.

 

 

15/05/2012 – 08:34 Categories: Pump | Post a comment