Changsha Grace pumps, zdm wearable self-balancing multi-stage centrifugal pumps

Multistage centrifugal self-balancing is to meet user needs, accelerate the development of high-pressure multi-stage pump technology, the use of similar foreign products of advanced technology combined with our years of experience in the design, the use of state recommended hydraulic model of energy-efficient products, according to API610 standard of research and development The efficient production of high-pressure multistage centrifugal self-balancing multi-stage centrifugal self-balance multistage centrifugal pump products; living in the industry technology leader. Efficient district wide, wide range of performance, cavitation performance, safety and smooth operation, low noise, less wearing parts, and easy installation and maintenance. Greatly improved reliability, uptime is more than three times the normal pump, user maintenance costs greatly reduced, thereby reducing the life cycle cost of the pump. Segmental centrifugal high-pressure self-balancing will form the structure of the traditional multi-stage centrifugal pumps of the innovative, multi-stage centrifugal canceled axial force balance mechanism is the use of the balance disc or drum balanced structure D, DG-type multi-stage centrifugal The best alternative to the pump. Because no balancing device, ie no loss of balance disc friction disc nor balanced reflux losses, so the pump efficiency 5-14% higher than in the same category multistage pumps, while thoroughly address the balance and lead to device failure balance disc and balance disc seat wear or killed by other rotor failure, greatly extend the life of the pump. Years of operation proved that the product performance reached the international advanced level of similar products. Model significance Example: D (DF, DY, MD) 450 - 95 × 12 (P) D--, said horizontal multistage centrifugal pump water DF-- represent horizontal multistage centrifugal pump corrosion, said horizontal multi DY-- stage centrifugal pump MD-- expressed mine wearable horizontal multistage centrifugal pump design point flow 450-- expressed 450m3 / h 95-- design point represents a single-stage head is 95m 12-- said the series of 12 P- - said the self-balancing type works driven by the motor shaft rotation, the liquid for power, making energy increases, so that the required amount of liquid from the tank through a suction pump water segment, is the impeller vanes are, in the middle, level segment of the water outlet, the transition tube, after the secondary water segment, the anti-wheel anti-missile leaves, water segment vertical outlet, the liquid source Grace multistage centrifugal pump factory processing Grace multistage centrifugal pump factory pump working constantly sending source. Structural features MD (P) pump is single suction or double suction horizontal imported multistage centrifugal pump suction can be vertical or horizontal direction, arranged vertically upward outlet. Are: water segment, the middle, the water segment, the secondary water segment, being the guide vanes, ABM leaves, are the impeller, the anti-impeller, shaft, throttle, pressure relief devices, gear sets, bearing body, the transition tube component parts; the middle of the sealing surface of the wear bars and high-strength bolts out of the water segment joins pump water segment, the middle, the water between segments are made of molybdenum disulfide grease metal hard sealing surface; a rotor mounted on the shaft by positive impeller throttle pressure relief devices, anti-impeller, bushings, bearings and other parts gear sets; self-balance multistage centrifugal self-balancing multi-stage centrifugal pump bearings "solid - Tour-style" dry oil lubrication structure, drive end using cylindrical roller bearings, angular contact ball bearing end uses; studio by the water pump, middle, water segment, the secondary water segment, being the guide vanes, ABM leaves, transition tubes and other components; rotor part fixed fitted between the portion of the seal ring, the guide vane sets and other seal, when the seal ring should wear sleeve and guide vanes have affected performance of the pump to be replaced in a timely manner; shaft seal in the form of two mechanical seals and packing seal. When the pump packing, packing ring placed position to be correct, the tightness of the filler must be appropriate, in order to be able to drop by drop liquid oozing appropriate. Pumps installed sealing elements sealed cavity, the cavity must pass a certain pressure of water from the water seal, water cooling and lubrication in water. Fitted at the shaft seal replaceable bushings to protect shaft; pumps can enter without disassembly, replacement of bearings, seals under the export pipeline situation. This series of pumps by the elastic diaphragm coupling pin coupling or direct drive prime mover. From the direction of the prime mover, the pump is clockwise. Features 1) Energy efficient: the use of advanced hydraulic model, independent research and development of energy efficient products; there is no wear and tear due to the pump rotor and axial pulsating balance disc, the impeller and guide vanes neutral is always at its best, is not Like ordinary wear multi-stage pump structure with balance disc rotor components and appear forward efficiency decreased; and there is no leakage of water balance, reducing the volume loss, improve overall operating efficiency of the pump and reduce the shaft power, The average pump efficiency than ordinary multistage 2% -3%; 2) the new structure: a rotor having an impeller member symmetrically arranged, at all levels of axial force generated by the impeller symmetrically offset from each other, without using the disc structure will be able to balance the pump chamber Automatic huge balance of axial thrust, breaking the traditional structure of multi-stage pump; 3) new technology: a unique throttle, pressure relief devices, odd level balancing device, but also play the role of auxiliary support; 4) high reliability : the symmetrical arrangement of the impeller, axial thrust generated basically run since equilibrium, eliminating the need for a small gap, high pressure drop, easy erosion, easy to wear, failure-prone balance disc device, so that the axial force load on adverse effects of wear of the pump and the system to minimize interference. Residual axial force by the thrust bearing to withstand, such that the shaft is always in tension, the force axis of the state uniform, and the peak stress than the prototype structure is greatly reduced, thereby increasing the rigidity and the critical speed of the rotor pump, the pump rotor run The stability and reliability significantly improved; good 5) cavitation performance, long life: the optimized hydraulic and structural design, precision casting, reliable wear-resistant material, and some models with double suction impeller pump heads structure, so Pump has a good anti-cavitation performance, smooth running machine, low noise, long life; 6) mechanical seal reliability: pump start, stop when no axial movement of the rotor parts, no axial pulsating work to overcome has been plagued by a multi-stage pump mechanical seal poor reliability of this problem; 7) are widely used: the abolition of the small gap balance disc, multi-stage pump structure than the traditional media to adapt to a more severe nature of the occasion; 8) Low maintenance costs: the use of sophisticated casting, reducing the vulnerability of parts and maintenance disassembly times, extending the life of the product, the maximum to avoid a series of problems due to disassembly caused by too much, reduce maintenance costs; convenient 9) Maintenance: product machine using three-dimensional design, rotor parts CNC machining, rigorous process to ensure that the size and precision of each component; positioning precision self-balance multistage centrifugal self-balance multistage centrifugal indeed, one of ordinary skill just press the assembly sequence assembly drawings and requirements to complete ; completely avoid the old multi-stage pumps must be adjusted in order to locate professionals in the axial dimension jump move, give the user a great convenience. Commissioning notes self-balance multistage pump debugging main attention: 1, turn. Generally there will be a multi-stage pump steering cards, note whether consistent steering pump calibration; all centrifugal pumps, generally as a reference axis, the pump rotation viewed from above (regardless of the pump is reversed or clockwise) pump impeller rotation direction should be towards the pump outlet, namely the rejection of water impeller instead of bailing. 2, the outlet pressure gauge. Outlet pressure gauge installed between the pump requires export and import gate valve, preferably mounted on the same path from the pump outlet pipe diameters twice. Outlet pressure gauges indicated, should be close to the value in the calibration of the pressure pump nameplate. 3, to observe the work of the cabinet of the current value. Qualified self-balancing multi-stage pump, its motor operating current should be less than the rated current value. 4, to observe the opening of the outlet valve, when clicking the operating current exceeds the rated current is too low or the outlet pressure gauge, check the opening of the outlet valve. If the pump outlet flow area is much smaller than the outlet valve flow area, if the valve opening is too large, but the pressure is certainly small outlet pressure gauges, pumps are running below the low lift and large flow. At this point should be the outlet valve off a small, close to the outlet pressure at the pump nameplate calibration pressure nearby. Self-balancing multi-stage centrifugal pump diagram editing the new MD-pressure multistage centrifugal pump of this paragraph, the basic design is that the practical operation of the whole process pump safety, economy, trouble-free operation capability and low maintenance costs. The main design features of the pump briefly as follows:? The combination of advanced modular design, the extensive use of the long-running tests through local assemblies, parts with a high degree of interchangeability. ? Quick assembly and disassembly design, allowing the pump without dismantling the pump and the inlet and outlet pipe replacement seals, bearings and balance components, ensuring less overhaul and inspection time. ? High efficiency, high reliability, low cost of the combination. By the best match of the impeller and guide vanes, and a reasonable fit clearance and axial throttle wide design, so that the high-pressure multistage centrifugal pump in the long run is still able to maintain its high stability and high operating efficiency. ? Good cavitation performance. Excellent hydraulic model using an impeller or special double suction impeller structure, users do not need additional configuration or a booster pump into the tank height increase. Pump symmetrical arrangement can basically eliminate the axial force, residual axial force by a pair of angular contact ball bearing back to back. Because no balancing device, ie no loss of balance disc friction disc nor balanced reflux losses, so the pump efficiency 5-14% higher than in the same category multistage pumps, because no balance device, completely solved due to device failure and cause the pump to balance the balance balance disc tray and seat wear or killed by other rotor failure, greatly extend the life of the pump. ? Safe pump seal design. Sam Chang Pump and structure depending on the pressure, pump metal face seal and metal surfaces of the metal spiral wound gasket or O-ring seal. ? Unique structural strength design. Allow single-stage pump head up 1Mpa (100m), the outlet pressure of up to 16Mpa (total lift 1600m), and the bearing and rotor core package consisting of parts not affected by temperature changes, with excellent thermal shock resistance. ? High strength forged Sam Chang Pump pump casing structure and high quality materials and a wide selection of inlet and outlet flanges and take over the design and improve the high pump allowable nozzle loads, and can be ready to meet the special circumstances of the user system specific requirements. ? According to user requirements, increase the center tap and minimum flow systems. When using the cartridge mechanical seal because no axial movement, completely overcome the old type multistage pump shaft to traverse when grinding mechanical seal ring movement and failure due to poor contact. In actual operation, so that the water does not leak.