CN202707594U - Preheating water pump - Google Patents

Abstract

The utility model provides a preheating water pump. A final stage impeller is arranged in a cavity of a pump body and one end of the final stage impeller is provided with a guide blade. An impeller spacing sleeve is arranged on a pump shaft which is in the cavity and between the guide blade and the final stage impeller. Two ends of the guide blade are respectively provided with a first-stage impeller and a final-stage impeller. One end of the pump body is linked with a front pump cover. A front lining plate is arranged between the front pump cover and the first-stage impeller. A bolt penetrates through the front lining plate and is fixed on the front pump cover. An inducer is arranged in a cavity of the front pump cover and connected with the pump shaft through a bolt penetrating through the inducer. The pump shaft is arranged at the center of the pump body. An inlet bush is arranged between the front pump cover and the inducer and the other end of the final stage impeller is provided with a rear lining plate. The other end of the rear lining plate is provided with a rear pump cover. Shaft sleeves are arranged in cavities of the rear lining plate and the rear pump cover and fixed on the pump shaft through a nut. The rear pump cover and the shaft sleeves are sealed together in mechanical mode, fixed by a seal press cover and locked by a bolt. The other end of the pump body is linked with a bearing seat. A bearing A and a bearing B are arranged in a cavity of the bearing seat. End covers are respectively arranged on external ends of the bearing A and the bearing B and locked by bolts. Convex blocks of a cooling stuffy cover stretch into grooves arranged on the end covers. The other end of the pump shaft is provided with a linkage sleeve. The pre-heating water pump is characterized with high net positive suction head (NPSD) resistance performance and meets requirements of the modern pre-heating water pump industry for being high-efficiency, energy-saving, reliable in operation, free of breakdown, long in time, free of leakage, convenient to maintain and the like.

Description

A kind of preheating water pump

Technical field:

The utility model relates to pump, particularly relates to a kind of preheating water pump with efficient, safe high-cavitation-resistance energy.

Background technique:

A kind of preheating water pump of FZAM series is mainly for delivery of the Heisui River of solid content 10% below, and temperature≤120 ℃ are contained a small amount of NH3, H2S, CO2, chlorion simultaneously, easy fouling, and medium is corrosive.The cavitation of pump, abrasion and symphyogenetic destruction thereof are major issues in pump operation, maintenance and the management work always, and traditional surface protecting material and technique can not satisfy the requirement of water pump anti-cavitation, abrasion far away.The model utility content:

The purpose of this utility model will provide a kind of preheating water pump exactly, and it has the performance of high anti-cavitation, abrasion, solves the existing problem of existing product.The purpose of this utility model is to realize like this, a kind of preheating water pump, comprise pump shaft, the pump housing, axle sleeve, bearing A, bearing B and bearing cap, it is characterized in that: be provided with impeller in the inner chamber of the pump housing, one end of impeller is provided with stator, be provided with between impeller on the inner chamber pump shaft between stator and the impeller and overlap, the two ends of stator are respectively arranged with first stage impeller and impeller; One end of the pump housing connects with front pump cover, is provided with front liner plate between front pump cover and the first stage impeller, and bolt passes front liner plate and is fixed on the front pump cover; Be provided with inducer in the inner chamber of front pump cover, and pass inducer by screw and link to each other with pump shaft, pump shaft is positioned at the central authorities of the pump housing, is provided with the import lining between front pump cover and the inducer; The other end of impeller is provided with rear lining plate, the other end of rear lining plate is provided with rear pump cover, be provided with axle sleeve in the inner chamber of rear lining plate and rear pump cover and be fixed on the pump shaft by nut, be provided with mechanical seal between rear pump cover and the axle sleeve and locked by the sealing gland set screw; The other end of the described pump housing connects with bearing support, be provided with bearing A and bearing B in the inner chamber of bearing support, the outer end of bearing A and bearing B is respectively arranged with end cap and by screw lock, is provided with groove on the end cap, and the projection on the cooling stifle stretches in the groove of end cap; The other end of pump shaft is provided with joint sleeve.

A kind of preheating water pump has the custom-designed a kind of novel slow-speed of revolution of characteristics of the pump of high resistance net positive suction head performance, low cavitation, corrosion resistant, wear-resisting type pump, meets modern a kind of preheating water pump industry: efficient, energy-conservation, reliable, fault-free, time be long, without the requirement such as leaking, easy to maintenance.

Description of drawings:

Fig. 1 is the utility model structural representation.

1, front pump cover, 2, the import lining, 3, inducer, 4, front liner plate, 5, first stage impeller, 6, stator, 7, overlap between impeller, 8, impeller, 9, rear lining plate, 10, rear pump cover, 11, the pump housing, 12, axle sleeve, 13, mechanical seal, 14, sealing gland, 15, nut, 16, cooling stifle, 17, bearing A, 18, pump shaft, 19, bearing B, 20, bearing cap, 21, joint sleeve.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing;

A kind of preheating water pump, comprise pump shaft 18, the pump housing 11, axle sleeve 12, bearing A17, bearing B19 and bearing cap 20, it is characterized in that: be provided with impeller 8 in the inner chamber of the pump housing 11, one end of impeller 8 is provided with stator 6, be provided with on the inner chamber pump shaft 18 between stator 6 and the impeller 8 and overlap 7 between impeller, the two ends of stator 6 are respectively arranged with first stage impeller 5 and impeller 8, one end of the pump housing 11 connects with front pump cover 1, be provided with front liner plate 4 between front pump cover 1 and the first stage impeller 5, bolt passes front liner plate 4 and is fixed on the front pump cover 1; Be provided with inducer 3 in the inner chamber of front pump cover 1, and pass inducer 3 by screw and link to each other with pump shaft 18, pump shaft 18 is positioned at the central authorities of the pump housing 11, is provided with import lining 2 between front pump cover 1 and the inducer 3; The other end of impeller 8 is provided with rear lining plate 9, the other end of rear lining plate 9 is provided with rear pump cover 10, be provided with axle sleeve 12 in the inner chamber of rear lining plate 9 and rear pump cover 10 and be fixed on the pump shaft 18 by nut, be provided with mechanical seal 13 between rear pump cover 10 and the axle sleeve 12 and locked by sealing gland 14 set screws; The other end of the described pump housing 11 connects with bearing support, be provided with bearing A17 and bearing B19 in the inner chamber of bearing support, the outer end of bearing A17 and bearing B19 is respectively arranged with end cap 20 and by screw lock, is provided with groove on the end cap 20, and the projection on the cooling stifle 16 stretches in the groove of end cap 20; The other end of pump shaft 18 is provided with joint sleeve 21.

During implementation, import design inducer reduces cavitation of pump.Because lift is higher, adopt the single-stage impeller diameter larger, render a service the shortcomings such as low, both stage impellers is adopted in design, and first stage impeller is mainly considered the cavitation impact, and sencond stage impeller considers to improve pressure, so separately design is not only satisfied the requirement of net positive suction head but also has been improved pump efficiency, and peak efficiency reaches 75%; Adopt cantilever structure, be conducive to anti-cavitation; Thin oil lubricant is adopted in transmission; Be sealed into the flushing of plan32 scheme, sealing has good environment, improves the pump operation cycle; Impeller has good solid particle passing capacity, is easy to especially the cleaning of crystallization medium, and is conducive to contain the unlikely generation blocking phenomenon of passing through of solid medium; Two impellers are equipped with back blade, and back blade balancing axial thrust and reduction medium are at axial leakage pressure, to improve reliability and the working life of sealing.Stator radially, guide vane plays pumping chamber, and return guide vane has removed the pumping chamber effect, underspeeds, and eliminates outside the liquid in rotation component, also plays the suction chamber effect of liquid being introduced subordinate's impeller.

Claims (1)

1. preheating water pump, comprise pump shaft (18), the pump housing (11), axle sleeve (12), bearing A(17), bearing B(19) and bearing cap (20), it is characterized in that: be provided with impeller (8) in the inner chamber of the pump housing (11), one end of impeller (8) is provided with stator (6), be provided with cover (7) between impeller on the inner chamber pump shaft (18) between stator (6) and the impeller (8), the two ends of stator (6) are respectively arranged with first stage impeller (5) and impeller (8), one end of the pump housing (11) connects with front pump cover (1), be provided with front liner plate (4) between front pump cover (1) and the first stage impeller (5), bolt passes front liner plate (4) and is fixed on the front pump cover (1); Be provided with inducer (3) in the inner chamber of front pump cover (1), and pass inducer (3) by screw and link to each other with pump shaft (18), pump shaft (18) is positioned at the central authorities of the pump housing (11), is provided with import lining (2) between front pump cover (1) and the inducer (3); The other end of impeller (8) is provided with rear lining plate (9), the other end of rear lining plate (9) is provided with rear pump cover (10), be provided with axle sleeve (12) in the inner chamber of rear lining plate (9) and rear pump cover (10) and be fixed on the pump shaft (18) by nut, be provided with mechanical seal (13) between rear pump cover (10) and the axle sleeve (12) and locked by sealing gland (14) set screw; The other end of the described pump housing (11) connects with bearing support, be provided with bearing A(17 in the inner chamber of bearing support) and bearing B(19), bearing A(17) and bearing B(19) the outer end be respectively arranged with end cap (20) and by screw lock, end cap is provided with groove on (20), and the projection on the cooling stifle (16) stretches in the groove of end cap (20); The other end of pump shaft (18) is provided with joint sleeve (21).

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