CN202520565U - Novel wear-resisting and corrosion-resisting chemical centrifugal pump - Google Patents

Abstract

The utility model discloses a novel wear-resisting and corrosion-resisting chemical centrifugal pump, which is applicable to delivering corrosive liquid containing fiber media such as solid particles in industries of papermaking chemical industry, food, environmental engineering and the like. A pump shaft is fixed on a bearing box of a suspension rack; a front gland and an end cover are respectively fixed on two ends of the bearing box; mechanical seal is arranged between a pump cover and the pump shaft; an impeller is fixed on one end of the pump shaft; the pump body is fixed on the suspension rack; a front lining plate is arranged between the pump body and the impeller; a rear lining plate is arranged between the pump cover and the impeller; cemented carbide layers are respectively coated on the front lining plate and the rear lining plate made of corrosion-resisting and wear-resisting materials, so that the wear-resisting property of the front lining plate and the rear lining plate are further improved; and simultaneously, the surfaces of the coating layers are smoother, so that the friction and the resistance of overflowing objects are reduced, serous fluid can pass through quickly, the use power of a water pump is reduced, the service efficiency is enhanced, and the energy-saving effect is remarkable.

Description

The corrosion-resistant chemical centrifugal pump of a kind of novel wear resistant

Technical field

The utility model relates to a kind of centrifugal pump, relates in particular to a kind of chemical centrifugal pump that industries such as papermaking chemical industry, food and environment-friendly engineering are carried the corrosive liquids that contains fiber mediums such as solid particle that is applied to.

Background technique

The wear resistant corrosion resistant chemical centrifugal pump can be widely used in industries such as paper mill, food processing and environmental protection and carry the slurries that contain the abrasion solid particle, like the conveying of paper mill paper pulp.In chemical industry, also can carry some to contain the corrosivity slurries of crystalline solid.The material of employed in the market wear resistant corrosion resistant chemical centrifugal pump is U.S. mark 304, or the two-phase Neutral Steel, though have certain decay resistance; But its wear-resisting property is relatively poor, and after the long-time running of pump, wear phenomenon can appear in the pump housing and impeller; In case wearing and tearing surpass certain scope, the transfer efficiency of pump just descends significantly, and the noise of pump operation can be multiplied; Must change the pump housing and impeller etc., the wear resistant corrosion resistant chemical centrifugal pump should wear-resisting good corrosion resistance again for this reason, but the good pump of wear resistance is with its corrosion-resistant of material; The material of good corrosion resistance again can not be wear-resisting; This is the insoluble a great problem of wear resistant corrosion resistant chemical centrifugal pump always, so this type of centrifugal pump is the high flow rate article, wear-resisting problem can't effectively improve and solve always.The producer that has is employed in and is provided with preceding liner plate and the rear lining plate that the anticorrosive wear-resistant material is processed between the pump housing and the impeller, improves the corrosion-resistant and wear-resisting property of the pump housing, has prolonged the working life of the pump housing.But when conveying contained solid particle medium, forward and backward liner plate was radially still easy to wear, and the forward and backward liner plate in wearing and tearing back does not just have wear-resisting effect.

The model utility content

The utility model purpose is to provide a kind of novel chemical centrifugal pump, at forward and backward liner plate spraying one deck hard alloy layer of being processed by the anticorrosive wear-resistant material, further improves the wear-resisting property of forward and backward liner plate, prolongs the working life of pump.

The technological scheme of the utility model is achieved in that

A kind of wear resistant corrosion resistant chemical centrifugal pump comprises the pump housing, impeller, pump shaft, suspension and pump cover, and said pump shaft is fixed on the bearing housing of suspension; Gland and end cap before said bearing housing two ends are fixed with respectively, said pump cover is fixed on the said suspension, between said pump cover and pump shaft, is provided with mechanical seal; Said impeller is fixed on an end of said pump shaft; The said pump housing is fixed on the said suspension, is provided with preceding liner plate between the said pump housing and the impeller, and this preceding liner plate is fixed on the said pump housing; Between said pump cover and impeller, be provided with rear lining plate, this rear lining plate is fixed on the said pump cover; It is characterized in that: liner plate and rear lining plate are coated with one deck hard alloy layer before described, before said between the liner plate and the pump housing, between rear lining plate and the pump cover, are provided with liner.

Described mechanical seal is bellows mechanical seal; Axial projections and the axial recess that cooperatively interacts arranged on the rotating seat of said mechanical seal and the circumferential surface of spring seat, between the inner peripheral surface of described rotating seat and spring seat and pump shaft outer peripheral surface, be provided with bellows.

Said bellows is a rubber corrugated pipe.

The utility model compared with prior art has following advantage:

1. because the preceding liner plate that the anticorrosive wear-resistant material between the pump housing, pump cover and impeller is processed and rear lining plate spraying one deck hard alloy layer; Further improve the wear-resisting property of forward and backward liner plate, coating surface is more smooth simultaneously, has reduced the frictional force and the resistance of overcurrent object; Slurries can be passed through fast; Reduced the use power of water pump, strengthened utilization efficiency, energy-saving effect is remarkable.

2. after wearing and tearing appear in impeller; Can regulate the position of forward and backward liner plate through the liner that adopts different-thickness; Reach the gap of regulating between forward and backward liner plate and the impeller; Pump is in the good working order, has prolonged the working life of impeller, this pump has good abrasion resistance and decay resistance.

3. owing on the circumferential surface of described rotating seat and spring seat axial projections and the axial recess that cooperatively interacts arranged; So during work; Spring seat drives rotating seat and rotates, so spring seat and rotating seat have been born main moment of torsion, and rubber corrugated pipe is born moment of torsion hardly; So effectively avoided rubber corrugated pipe to tear, thereby guaranteed sealing.

Description of drawings

Fig. 1 is the structural representation of the corrosion-resistant chemical centrifugal pump of the said novel wear resistant of the utility model

Fig. 2 is the structure enlarged view of mechanical seal shown in Fig. 1

1. liner plate 4. impellers 5. rear lining plates 6. pump covers 7. suspensions 8. pump shafts before the pump housing 2. liners 3.

9. gland 14. bearing housings 15. end caps 16. axial projections 17. axial recess before mechanical seal 10. rotating seats 11. bellowss 12. spring seats 13..

Embodiment

Can find out that from Fig. 1 and Fig. 2 the corrosion-resistant chemical centrifugal pump of a kind of novel wear resistant comprises the pump housing 1, impeller 4, pump shaft 8, suspension 7 and pump cover 6; Said pump shaft 8 is fixed on the bearing housing 14 of suspension 7; Gland 13 and end cap 15 before said bearing housing 14 two ends are fixed with respectively, said pump cover 6 is fixed on the said suspension 7, between said pump cover 6 and pump shaft 8, is provided with mechanical seal 9; Said impeller 4 is fixed on an end of said pump shaft 8, and the said pump housing 1 is fixed on the said suspension 7; Liner plate 3 before being provided with between the said pump housing 1 and the impeller 4, this preceding liner plate 3 is fixed on the said pump housing 1; Between said pump cover 6 and impeller 4, be provided with rear lining plate 5, this rear lining plate 5 is fixed on the said pump cover 6; It is characterized in that: liner plate 3 is coated with one deck hard alloy layer with rear lining plate 5 before described, before said between the liner plate 3 and the pump housing 1, between rear lining plate 5 and the pump cover 6, is provided with liner 2.Described mechanical seal 9 is bellows mechanical seal; On the rotating seat 10 of said mechanical seal 9 and the circumferential surface of spring seat 12 axial projections 16 and axial recess 17 that cooperatively interacts arranged, between the inner peripheral surface of described rotating seat 10 and spring seat 12 and pump shaft outer peripheral surface, be provided with bellows 11.Said bellows 11 is a rubber corrugated pipe.

Because it is more serious near the general wearing and tearing in the position of impeller 4 to be positioned at the pump housing 1 inside; Because can receive the impact of the slurries that impeller 4 rolls; So liner plate 3 before between the pump housing 1 and impeller 4, being provided with; Between pump cover 6 and impeller 4, be provided with rear lining plate 5, preceding liner plate 3 is provided with the cemented carbide protective layer of one deck through the spraying of HVAF technology with rear lining plate 5, and the supersonic flame anger is coated with strong wallop makes coating present compressive stress state; Reduce the chance of coating crack, made it to form the superpower wear-resistant protective layer.Preceding liner plate 3 before the spraying is below the 40HRC with rear lining plate 5 hardness, and the hardness after the spraying can reach about 68-72HRC, and hardness has improved greatly, and its wear resistance impact resistance has just obtained improving greatly.Through friction and wear test report contrast, under equal test condition, the wear extent of cemented carbide protective layer has only 1/3 of original paper, so that the wear resistance of this pump improved about three times.Coating surface is more smooth simultaneously, has reduced the frictional force and the resistance of overcurrent object, and slurries can be passed through fast, has reduced the use power of water pump, has strengthened utilization efficiency, and energy-saving effect is remarkable.

More than show and described the advantage of basic principle, major character and the wooden model utility of the utility model.The technician of the industry should understand; The new plough of this practicality is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.

Claims (3)

1. the corrosion-resistant chemical centrifugal pump of novel wear resistant comprises pump housing ⑴, impeller ⑷, pump shaft ⑻, suspension ⑺ and pump cover ⑹, and said pump shaft ⑻ is fixed on the bearing housing ⒁ of suspension ⑺; Gland ⒀ and end cap ⒂ before said bearing housing ⒁ two ends are fixed with respectively; Said pump cover ⑹ is fixed on the said suspension ⑺, between said pump cover ⑹ and pump shaft ⑻, is provided with mechanical seal ⑼; Said impeller ⑷ is fixed on the end of said pump shaft ⑻; Said pump housing ⑴ is fixed on the said suspension ⑺, liner plate ⑶ before being provided with between said pump housing ⑴ and the impeller ⑷, and this preceding liner plate ⑶ is fixed on the said pump housing ⑴; Between said pump cover ⑹ and impeller ⑷, be provided with rear lining plate ⑸, this rear lining plate ⑸ is fixed on the said pump cover ⑹; It is characterized in that: liner plate ⑶ and rear lining plate ⑸ are coated with one deck hard alloy layer before described, before said between liner plate ⑶ and the pump housing ⑴, between rear lining plate ⑸ and the pump cover ⑹, are provided with liner ⑵.

2. the corrosion-resistant chemical centrifugal pump of a kind of novel wear resistant according to claim 1; It is characterized in that: described mechanical seal ⑼ is bellows mechanical seal; Axial projections ⒃ and the axial recess ⒄ that cooperatively interacts arranged on the rotating seat ⑽ of said mechanical seal ⑼ and the circumferential surface of spring seat ⑿, between the inner peripheral surface of described rotating seat ⑽ and spring seat ⑿ and pump shaft outer peripheral surface, be provided with bellows ⑾.

3. the corrosion-resistant chemical centrifugal pump of a kind of novel wear resistant according to claim 2 is characterized in that: said bellows ⑾ is a rubber corrugated pipe.

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