CN2451778Y - Protection of submerged mud pump - Google Patents

Abstract

The utility model relates to a sealing and preventing device of a submerged mud pump. The device is on a hub end surface of a pump impeller 5 and is provided with an elastic polyurethane static sealing ring 7. A spring 8 is used for providing plugging pressure to seal a mud passage through a pad plate. The lower part of a lower bearing 10 of the pump is provided with an oil seal 9. A supporting pipe of the pump is filled with lubrication oil. The pressure of the lubrication oil makes mud not enter bearings. Thus, a main shaft and bearings of the pump are protected, the service life of the pump is extended, and the run cost of the utility model is reduced.

Description

Slurry pump under the novel protective liquid

The utility model relates to slurry pump sealing protection facility under the liquid.

Pump case slipped in the mud when slurry pump was worked under the liquid, was widely used in field slurry conveyed such as desilting, fill and engineering the drilling.Contain a large amount of hard grains of sand etc. in the mud, make impeller 5 housings 6 of pump become the vulnerable part of frequent replacing.Special because pump mud pressure effect makes the mud that has solids the grind away rotary main shaft and the bearing of pump, causes full pump to damage.

At present the pump seal structure roughly has two kinds: 1, as Fig. 1,2 of pump shaft 1 and the pump housings, establish the path that mud is sealed in reinforced seal or stuffing box packing.2, as Fig. 2, between the pump shaft behind the impeller and the pump housing, establish twice mechanical seal 4, practice shows that first kind of sealing configuration is along with the lengthening solids of pump operation time infiltrates running shaft and seals middle, make both wearing and tearing lose seal action, thereby cause mud to invade bearing, make axle and damage of bearings, full pump can't be worked.Second kind of mechanical seal also often damages, and makes bearing enter mud and grinds away, and causing full pump can't turn round.Main shaft and bearing often damage, and maintenance expenses is increased, and shorten working time, cause operating cost to increase.

The purpose of this utility model is with slurry pump under a kind of novel protective liquid, makes the rotary main shaft of pump and bearing by solids wearing and tearing in the mud, with life-span of prolonging pump and reduce cost.

The technical solution of the utility model is as shown in Figure 3: do the stationary end face seal with wear-resisting elasticity polyurethane ring 7, seal the gap of the impeller hub and the pump housing of rotation, be full of oil in the support tube of pump, utilize the pressure of oil level to prevent that mud from entering with the protection bearing.

This technological scheme beneficial effect is: 1, Feng position is in the impeller hub upper-end surface, impeller itself is exactly the wear-out part of often changing, and can not cause cost to increase so the hub end surface wear is changed, and the end-blocking face is compared with the envelope axle, can lean on the spring pressure compensate for wear, envelope effective.2, because of the pressure of oil level greater than outside mud pressure, make the task of bearing bottom oil sealing enter to become and prevent that oil from leaking outside by shutoff mud, mud can not enter bearing again, makes axle and bearing obtain reliable protection from structure.

Description of drawings:

Fig. 1 is with filler or skeleton envelope schematic representation

Fig. 2 uses the mechanical seal schematic representation

Fig. 3 is the structural representation of slurry pump under the novel protective liquid

Among the figure: 1, main shaft 2, the pump housing 3, filler or skeleton envelope 4, mechanical seal 5, impeller 6, pump case 7, elasticity polyurethane stationary ring 8, spring 9, oil sealing 10, bearing 11, lubricant oil 12, support tube

Embodiment of the present utility model describes concrete structure of the present utility model and working condition in detail below in conjunction with this figure as shown in Figure 3, the main shaft 1 of pump is impeller 5 rotations under motoring, by pump case 6 outside slurry conveyed, stationary ring 7 is done with wear-resisting elasticity polyurethane in wheel hub upper-end surface at impeller 5, spring 8 gives stationary ring with shutoff pressure by backing plate, and recompenses when the impeller end surface wear.Establish oil sealing 9 in the bottom of bearing 10; be full of lubricant oil 11 in the support tube 12 of pump, the pressure that oil gravity produces when making work is greater than mud pressure, and mud will can not enter; make the main shaft and the bearing of pump obtain protection like this, the life-span that prolongs pump has been reduced operating cost.

Claims (1)

1, slurry pump under a kind of novel protective liquid includes sealing and protection work, it is characterized in that:

1), on pump impeller wheel hub end face, establish elasticity polyurethane standstill seal ring (7), provide shutoff pressure with spring (8) by backing plate, seal the mud access way;

2), establish oil sealing (9), in the pump support tube, be full of lubricant oil (11) in lower bearing (10) bottom of pump.

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