CN201461438U - Chemical engineering shielding electric pump with carborundum bearings and carborundum shaft sleeves - Google Patents

Abstract

The utility model discloses a chemical engineering shielding electric pump with carborundum bearings and shaft sleeves, which comprises a pump body and a motor which is connected with the pump body, wherein the motor comprises a rotor shaft, a rotor and a stator. The electric pump also comprises carborundum bearings and carborundum shaft sleeves, wherein a front carborundum shaft sleeve and a back carborundum shaft sleeve are installed at both ends of the rotor shaft, a front carborundum bearing and a back carborundum bearing are respectively installed in a front bearing seat and a back bearing seat, and a gap is arranged between the shaft sleeves and the bearings. The utility model greatly lowers the leakage probability, enhances the self regulation capability of the axial force of the shielding electric pump after the carborundum shaft sleeves and the carborundum bearings are adopted, also lowers the load of the motor and prolongs the service life of the shielding electric pump.

Description

A kind of chemical industry shielded electric-pump with SiC bearing and axle sleeve

Technical field:

The utility model relates to tube shield electric pump field, relates in particular to a kind of chemical industry shielded electric-pump with SiC bearing and axle sleeve.

Background technique:

Chemical pump is the energy-saving pump of national co-design, pump performance, technical requirements, according to the performance of international standard ISO2858 defined and size design, its advantage: complete series water conservancy performance is rationally distributed, user's range of choice is wide, " back open type " structure, and maintenance convenience, efficient and suction journey are reached advanced world standards.

Flexible pump (stainless steel) is widely used in departments such as oil, chemical industry, metallurgy, synthetic fiber, pharmacy, food, synthetic fiber and is used to carry the alkaline corrosion medium; Sliding vane pump is used in carries any acidity, alkaline corrosion medium; IS type chemical pump (cast iron quality) is used for industry, city water, draining, also can be used for farmland, orchard irrigation and drainage, for the usefulness of other liquid of carrying clear water or physics and the similar clear water of chemical property.

But mechanical seal was worn out after Chang Yong its major defect of general chemical pump was to use a period of time on the market, can produce leakage phenomenon, leaked the environment that can pollute us in case produce, and caused the production safety accident, and the interior machinery oil of mechanical seal can polluted water.Though existing common shielded electric-pump has overcome above-mentioned shortcoming, has embodied low noise, leak free advantage.But owing to be mostly to adopt the iron axle to cooperate graphite bearing, such shortcoming has: 1. graphite has certain pollution, and can play chemistry should; 2. graphite bearing has very high requirement to Environmental Conditions and medium, and when in medium particle being arranged, bearing is easy to wearing and tearing, thereby causes the life-span of entire product to be reduced; 3. graphite grinds mutually with metal axle sleeve, and the hardness ratio metal axle sleeve of graphite hangs down at using process graphite easy to wear, causes entire product to lose efficacy thereby cause the rotor housing to lose efficacy; 4. the cost of metal current part is common higher, and the cost of graphite bearing is also high.

For this reason, we need design a kind of novel bearing and the canned motorpump of axle sleeve, solve the problems referred to above, satisfy the needs for different occasions.

The model utility content:

Technical problem to be solved in the utility model is, at the present shielded electric-pump that uses of China, adopt the iron axle to cooperate graphite bearing, often have some problems, such as graphite certain pollution is arranged, graphite bearing has very high requirement to Environmental Conditions and medium, and bearing is easy to wearing and tearing, thereby causes the life-span of entire product to be reduced; Graphite grinds mutually with metal axle sleeve, and is easy to wear at using process graphite, causes entire product to lose efficacy thereby cause the rotor housing to lose efficacy; The cost of metal current part is common higher, and the cost of graphite bearing is also high.A kind of pipeline shielded electric-pump with inner circulation structure is provided, satisfies the needs of aspects such as economy, performance.

In order to address the above problem the technical solution of the utility model be:

A kind of chemical industry shielded electric-pump with SiC bearing and axle sleeve includes the pump housing, the motor that links to each other with the pump housing, former and later two bearings and former and later two axle sleeves; Described motor mainly is made of rotor shaft, rotor and stator; Former and later two bearings are SiC bearing in the described canned motorpump, and described former and later two axle sleeves are the silicon carbide axle sleeve, and described forward and backward silicon carbide axle sleeve is installed on the rotor shaft two ends, and described forward and backward SiC bearing is installed on respectively in the forward and backward bearing support; Described axle sleeve and bearing be provided with a slit.

On the SiC bearing at described rotor shaft two ends and axle sleeve, also be provided with a thrust disc.

The utility model uses carbofrax material to replace traditional material graphite, significantly reduced the pollution that graphite material is brought like this, also reduced of the requirement of assemblies such as bearing, axle sleeve for working environment, and also be greatly improved aspect the wear resistance that in use is, reduced the intensity of the maintenance work of electric pump, on cost performance, also be greatly improved

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is for being structural representation of the present utility model.

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 1, a kind of pipeline shielded electric-pump with inner circulation structure is made up of the shield electric machine that the pump housing is connected with the pump housing; The horizontal placement of whole electric pump, by pump housing base 19, be placed on the table top, the blade wheel chamber 5 that pump housing front end has pump housing import 1, pump housing outlet 2 and communicates with pump housing import 1 and pump discharge 2, be provided with the impeller 27 that shield electric machine drives in the blade wheel chamber 5, blade wheel chamber 5 also has an impeller inlet 3 and an impeller outlet 25, and impeller 27 roots have an impeller balance hole 26.

The chemical industry motor also comprises outer ring stator 18 and inner ring rotor 28, wherein is with stator can 20 on the stator 18, is with Rotor can 21 on the rotor 28, and has gap 22 between stator can 16 and the Rotor can 17.

Chemical industry motor skin is surrounded by a casing 17, and motor casing 17 rear and front ends are provided with forward and backward flange, by forward and backward flange stator can 20 is welded on the motor casing 17, and 21 of Rotor cans are welded on the rotor 28 two ends screen boards; Also be fixed with front-end bearing pedestal 30 and rear bearing block 14 respectively on the motor casing 17 forward and backward flanges, rotor shaft 29 is in forward and backward bearing support 30,14; Be provided with a rotor shaft through hole 10 in the rotor shaft 29, two ends also are provided with forward and backward axle sleeve 8,12, and forward and backward two bearings 6,15 is located in the forward and backward bearing support 30,14, and by rotor shaft 29 run through with wherein; 30 of stator can 20 inwalls and forward and backward bearing supports are provided with the slit, have one to cross liquid bath on the front-end bearing pedestal, and rear bearing block has a cavity between rotor shaft; And forward and backward two bearings 6,15 and bearing housing 8,12 are provided with thrust disc 9,16.

The bearing of chemical industry electric pump is a SiC bearing, and axle sleeve is the silicon carbide axle sleeve; 24 places, position between impeller 27 and the front-end bearing pedestal 30 are the zone of high pressure.

During work, electric pump starts the back medium from pump housing import 1 input, after entering impeller inlet 3 low pressure areas, because the formed certain working pressure of rotation of the rotary blade blade of motor, medium can flow to the pump housing from impeller outlet 4 and export 6, and a front-end bearing pedestal pressure stable hole 23 on the next door by zone of high pressure 24 comes voltage stabilizing.Again because there is certain pressure difference at impeller balance hole 26 places in the blade wheel chamber 5, the fed sheet of a media that can make progress reaches in the inner chamber of front-end bearing pedestal through the liquid bath of crossing of front-end bearing pedestal 30.Simultaneously owing to there is the gap 7 and 11 of axle sleeve and bearing, make that medium fully flows lubricated to the friction between front shaft sleeve 8, forward thrust bearing 6 and the fore bearing 30 of silicon carbide in this course, rely on the formed pressure difference in gap between rotor two housings 20,21 then, by the slit in the graphite bearing of back, be transported to rear bearing block inner chamber 13, and sufficient lubrication is carried out in the friction between rear bearing 15, rear axle housing 12 and the bearing support 14 of silicon carbide structure.Medium by the interior circulation through hole 10 of rotor shaft 29 inside, enters impeller inlet 3 low pressure areas, big circulation loop reciprocation cycle of whole formation from rear bearing block inner chamber 13.Forward and backward bearing 6,15 and bearing housing 8,12 firmly are fixed in the forward and backward bearing support 30,14 by thrust disc 9,16.

Axle sleeve in this structure, bearing support and the combination of bearing three samples and the sliding bearing that forms greatly reduces noise; The heat that the circulation loop medium has produced when having taken away a part of motor operation through the gap between rotor two housings time; Greatly reduce rotor assembly and acted on bearing pressure in the rear bearing block, reduced the wear rate of bearing, improved service life; Because bearing, bearing housing adopt carbofrax material, compare with graphite material again, that more durable, working environment requires is lower, it is also higher that medium pollution is still less reached cost performance; The through hole of the pressure of the front-end bearing pedestal inner chamber in the circulation loop by rotor shaft directly unloads and is pressed onto the impeller inlet place, reduce effect backward axial force, improved the self-adjustment capability of axial force, alleviated the load temperature rise raising that motor brings greatly because of axial force, reduce the aging of motor, prolonged the working life of motor.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (2)

1. the chemical industry shielded electric-pump with SiC bearing and axle sleeve includes the pump housing, the motor that links to each other with the pump housing, former and later two bearings and former and later two axle sleeves; Described motor mainly is made of rotor shaft, rotor and stator; It is characterized in that, former and later two bearings are SiC bearing in the described canned motorpump, described former and later two axle sleeves are the silicon carbide axle sleeve, and described forward and backward silicon carbide axle sleeve is installed on the rotor shaft two ends, and described forward and backward SiC bearing is installed on respectively in the forward and backward bearing support; Described axle sleeve and bearing be provided with a slit.

2. the chemical industry shielded electric-pump with silicon carbide axle sleeve and bearing according to claim 1 is characterized in that, also is provided with a thrust disc on the SiC bearing at described rotor shaft two ends and axle sleeve.

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