CN202100485U - External liquid infusion shield pump - Google Patents

Abstract

The utility model relates to an external liquid infusion shield pump, which is used for working conditions of conveying slurry media containing solid impurities, crystallizing objects and the like without leakage completely and comprises a pump body, an impeller and a shield motor. The shield motor is formed by a stator, a rotor, a front end cover, a rear end cover, a front bearing and a rear bearing. A rotating shaft end of the rotator extends into the pump body and is provided with the impeller, and the rotor is supported by the bearings arranged on the front end cover and the rear end cover. A cavity formed between the stator and the rotor of the shield motor is communicated with a liquid infusion pipeline through the rear end cover, and the liquid infusion pipeline is provided with a check valve, a flowmeter and a control valve which are used for controlling infused liquid quantity. When the external liquid infusion shield pump works, the lubrication and the cooling to the bearings of the shield motor are accomplished by rear-portion liquid infusion; and when media conveyed by the pump are mixed with slurry containing the solid impurities, the crystallizing objects and the like, the media can not enter a cavity of the motor, thereby effectively protecting the bearings of the motor of the shield pump and prolonging service life of the shield pump.

Description

Outside injection canned motorpump

Technical field

The utility model relates to a kind of shielded electric-pump, particularly a kind of outside injection canned motorpump.

Background technique

Present employed standard type canned motorpump is by fed sheet of a media bearing to be cooled off with lubricated; If when containing mud such as solid sundries, crystallization in the fed sheet of a media; Bearing will rapid wearing, because the gap between the rotor housing is less, the rotor housing also can damage very soon; Fed sheet of a media gets in the stator cavity, and motor will burn.

The canned motorpump that contains mud mediums such as solid sundries, crystallization at present in order to conveying; A mechanical seal is installed between pump and motor; Motor cavity and pump chamber are kept apart, inject the medium of cleaning in the motor cavity, circulate by the auxiliary impeller that is arranged in the motor cavity; Because motor has temperature rise, need to increase a cover heat exchanger circulating liquid is cooled off.In addition,, can't observe,, contain mud mediums such as solid sundries, crystallization and will get into motor cavity, can cause the serious consequence of bearing rapid wearing and burn-down of electric motor equally if mechanical seal damages from the outside because mechanical seal is arranged on canned motorpump inside.

To existing problem in the above-mentioned existing technology, a kind of novel outside injection canned motorpump of research and design, existing problem is very necessary in the existing technology thereby overcome.

Summary of the invention

In view of existing problem in the above-mentioned existing technology; The purpose of the utility model is a kind of novel outside injection canned motorpump of research and design; Bearing is cooled off when lubricated by fed sheet of a media thereby solve present employed standard type canned motorpump, in case when containing mud such as solid sundries, crystallization in the fed sheet of a media, bearing will rapid wearing; Because the gap between the rotor housing is less; The rotor housing also can damage very soon, and fed sheet of a media gets in the stator cavity, and motor such as will burn at problem.

The described outside injection canned motorpump of the utility model is by being made up of the pump housing, impeller, shield electric machine and fluid injection pipeline.Cavity between the rotor of described shield electric machine is connected with the fluid injection pipeline through rear end cover; On the described fluid injection pipeline check valve is housed, flow is taken into account control valve.

The purpose of the described outside injection canned motorpump of the utility model is the deficiency to existing technology, provide a kind of simple in structure, easy to operate, be applicable to and carry operating mode that contains mud mediums such as solid sundries, crystallization and the outside injection canned motorpump that can protect bearing and shield electric machine effectively.

The described outside injection canned motorpump of the utility model is made up of the pump housing, impeller, shield electric machine and fluid injection pipeline.Said shield electric machine is made up of stator, rotor, front cover, rear end cover and forward and backward bearing, and the rotating shaft end of rotor stretches in the pump housing, and impeller is housed, and rotor is by the bearings that is contained on the front and rear cover.Cavity between the rotor of described shield electric machine is connected with the fluid injection pipeline through rear end cover.The check valve, the flow that are used to control reservoir quantity are housed on the described fluid injection pipeline take into account control valve.

The outside injection canned motorpump of the utility model, the cooling of bearing is accomplished by outside fluid injection with lubricated, and the material of injection not have the liquid that influences for cleaning and to the character of pump fed sheet of a media and technology.With the existing technology ratio; Owing on the fluid injection pipeline, check valve is housed, can prevent to carry the medium refluence of mud such as containing solid sundries, crystallization to get into motor cavity, flow is housed take into account control valve on the fluid injection pipeline; Be used to control reservoir quantity; Can control and monitor with lubricated the cooling of bearing,, prolong the working life of canned motorpump so protected bearing and motor more effectively.

Description of drawings

The utility model has a width of cloth accompanying drawing,

Fig. 1 is the structural representation of outside injection canned motorpump.

Among the figure: 1, the pump housing 2, impeller 3,front cover 4, fore bearing 5,stator 6, rotor 7, rear bearing 8, rear end cover 9,check valve 10,flowmeter 11, control valve.

Embodiment

The practical implementation of the utility model is for example shown in the accompanying drawing, the described outside injection canned motorpump of the utility model, and the described pump housing 1 is connected with the stator 5 usefulness bolts of shield electric machine; The rotating shaft end ofshielding motor rotor 6 stretches in the pump housing 1; And impeller 2 is housed, androtor 6 is supported with rear bearing 7 by thefore bearing 4 that is contained on front cover 3 and therear end cover 8, andrear end cover 8 ends have through hole; Be communicated with the fluid injection pipeline, check valve 9,flowmeter 10 andcontrol valve 11 are housed on the fluid injection pipeline.

During work, fed sheet of a media gets into impeller 2 from the inlet of the pump housing 1, after impeller 2 pressurizations, is discharged by the outlet of the pump housing 1.The cooling-lubricant of bearing gets intorear end cover 8 by the fluid injection pipeline; Arrive the cavity between stator 5 and therotor 6 through the gap between rear bearing 7 and the axle sleeve; Gap between fore bearing 4 and axle sleeve is to the equalizing orifice of impeller 2, and the inlet from the equalizing orifice of impeller 2 to impeller 2 is discharged from the outlet of the pump housing 1 through impeller 2; Completion is to the cooling and lubricating of bearing, and the material of injection not have the liquid that influences for cleaning and to the character of pump fed sheet of a media and technology.Check valve 9 is housed on the fluid injection pipeline, can does not carry the medium refluence that contains mud such as solid sundries, crystallization to get into motor cavity owing to liquid injection system breaks down to cause.Flowmeter 10 andcontrol valve 11 are housed on the fluid injection pipeline, can control and monitor the cooling and the lubricated liquid measure of bearing, so protected bearing and motor more effectively.

Claims (1)

1. an outside injection canned motorpump is made up of the pump housing (1), impeller (2) and shield electric machine; It is characterized in that the cavity between the rotor of described shield electric machine is connected with the fluid injection pipeline through rear end cover; Check valve (9), flowmeter (10) and control valve (11) are housed on the described fluid injection pipeline.

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