CN2506797Y - Vertical double worm shell flow guiding centrifugal pump - Google Patents

Abstract

The utility model belongs to a vertical double volute flow guiding centrifugal pump which comprises a fixed part, a rotary part, a bearing part, and a sealing part, wherein the fixed part is composed of a suction section 4, a middle section 5, a discharge section 22, a base 1, a stuffing box 10, a motor bracket 14, etc., wherein the middle section 5 is provided with a guide vane. The utility model is characterized in that the middle section 5 of the fixed part and the guide vane are in an integral structure, and a double volute flow guiding mechanism is formed. The flow guiding mechanism is composed of two identical volutes 30 with spiral flow channels 31, and the spiral flow channels 31 are symmetrically distributed on the cross section of the volutes 30 in 180 DEG. The technology of the utility model has the characteristics of reasonable structure, convenient usage and installation, reduced volume and weight, low cost, small noise, etc.

Description

A kind of vertical double volute water conservancy diversion centrifugal pump

The utility model belongs to the centrifugal pump technical field, the multistage segmented centrifugal pump of particularly a kind of vertical double volute flow guide structure single suction.

As everyone knows, water pump is to be used for a kind of machinery that the liquid that clear water or physical property and chemical property be similar to water is carried (as city and factory's feedwater, field irrigation etc.); The maximum temperature of liquid is no more than 80 ℃ usually, the pump of special requirement, and the maximum temperature of liquid is no more than 100 ℃ usually.Usually this class pump comprises standing part, rotating part, bearing part and hermetic unit, generally mostly be horizontal pump, sometimes in order to reduce the floor space of water pump, on the basis of horizontal pump (MS type), improve and become vertical water pump (MSL), its standing part is formed with Bolt Connection by component such as suction casing 4, stage casing 5, Spit Section 22, base 1, stuffing box body 10, electric machine supports 14, wherein, the discharge opening of the suction port of suction casing 4, Spit Section 22 becomes 90 degree in the space, all become substantially horizontal.Rotating part is by vertical axle 27 and be contained in several impellers 6 on the axle 27 and be used for the balancing drum 18 of balancing axial thrust and forms, and whole rotating part is located by the sliding bearing (parts) 19 of upper end.Bearing part is made of sliding bearing (parts) 28 of lower end and the roller bearing component of upper end (adopting two single-row radial ball bearings) 19, and the former is lubricated by water seal water, adopts babbit glide bearing usually; The latter mainly overcomes remaining axial force, and it adopts grease lubrication.Hermetic unit is meant the hermetic unit of pump, comprise " O " type oil resistant rubber seal ring that the static junction plane between the suction casing 4, stage casing 5, Spit Section 22, stuffing box body 10 of pump adopts by bolt 15 tightening seal, in addition, the sealing of the rotating part of each inter-stage of pump reaches by the gap of rotating part.Though comparatively reasonable, easy to install and use on this technology structure collectivity, noise is less, its water diversion part is perfect not to the utmost, has following deficiency: the excursion to the gap between impeller outer and the cut water is little; Because general stator formula multistage pump inter-stage seam is the same with the stator external diameter big, the seam size is slightly larger than impeller outer diameter between the double volute pump stage, the former seam size is more much bigger than the latter like this, lifting surface area is corresponding also increase many, therefore the former turnbuckle is also just very thick, and this gives to make to use and brings many difficulties; Because general stator formula deflector is heavier, so the weight of pump is also heavier, the deflector stage casing and the stator of existing stator formula pump are cast respectively and are processed, complex process, and the cost height, the stator assembling is inconvenient.

The purpose of this utility model is: improve at the problem that prior art exists, design provides a kind of simple in structure, easy to use, enlarges the using scope of pump, reduce the volume and the weight of pump, the double volute flow guide structure that adopts stage casing and stator integral body to be cast as one, thus assembling cancelled, simplified technology, eliminate the interior radial force of pump, running steadily reduces cost the vertical double volute water conservancy diversion centrifugal pump of long service life.

The utility model is achieved by following manner: a kind of vertical double volute water conservancy diversion centrifugal pump, it comprises standing part, rotating part, bearing part and hermetic unit, standing part is by suction casing 4, stage casing 5, Spit Section 22, base 1, stuffing box body 10, electric machine support 14 component such as grade form with Bolt Connection, wherein, the suction port of suction casing 4, the discharge opening of Spit Section 22 becomes 90 degree in the space, all become substantially horizontal, rotating part is by vertical axle 27 and be contained in several impellers 6 on the axle 27 and be used for the balancing drum 18 of balancing axial thrust and form, on the stage casing 5 stator is housed, feature of the present utility model is; The stage casing 5 and the stator of standing part are designed to overall structure, and forming the double volute deflector, this deflector is made of the spiral case 30 of two identical band helical flow paths 31, wherein, helical flow path 31 on the spiral case 30 is 180 ° of symmetrical distributions on spiral case 30 cross sections, shown in 1,2,3.

Startup of the present utility model, running, shutdown:

One, starts

1, must rotate with hand before the starting mode of pump, should feel flexible.

2, check motor turns to whether meet turning to of pump.

3, start preceding the need and in pump, pour water or vacuumize diversion, and close outlet gate valve and gauge cock.

4, start water pump, open pressure gauge, vacuum gauge cock, open the outlet gate valve gradually and arrive till the required lift.

5, minimizing starts inferior as far as possible.

Three, running

1, note the temperature of water pump bearing part, the highlyest must not surpass 80 ℃, the every work of rolling bearing grease should be changed once in 1000 hours, and hot-tempered sound does not have in the rolling bearing running.

2, filler compresses degree should guarantee evenly to leak (the about 10-20 of per minute drips).

3, the every work of water pump should be overhauled in 2000 hours.Impeller and sealing ring gap when surpassing the twice of maximal clearance value because of wearing and tearing, should be changed seal ring.Impeller and seal ring maximal clearance value to the pump of different model as 40,50,65,80,100,125MSL is respectively 0.357,0.357,0.389,0.389,0.413,0.451 (millimeter), here refer to water pump inlet diameter (millimeter) as " 40 " among the 40MSL, " MSL " refers to that the water pump pattern is the multistage segmented centrifugal pump of vertical double volute single suction.

Three, shut down

Slowly close upper outlet gate valve and pressure gauge, vacuum gauge cock, close motor then.

Dismounting of the present utility model, assembling are installed:

One, dismounting

During the dismounting pump, carry out in the following order with reference to Fig. 1.

1, clears water in the pump.

2, parts such as dismounting motor, balancing pipeline, water sealing (sealing water) pipe, irrigation pipe.

3, stifled, the base of the long tube of dismounting pump.

4, water pump was fallen on ground, leveled up back dismounting blank cap, turnbuckle, suction casing.

5, dismounting sleeve nut and bearing housing.

6, dismantle impeller, stage casing successively, dismantle Spit Section, balancing drum, stuffing box body then successively.

7, dismantle electric machine support, pump coupling, bearing cap, roller bearing component at last successively.

Two, assembling

The assembling of pump is undertaken by the above-mentioned steps opposite sequence.

The utility model is compared with prior art, has simple in structure, easy to install and use, enlarge the using scope of pump, reduce the volume and weight of pump, the double volute flow guide structure that adopts stage casing and stator integral body to be cast as one, thus cancelled assembling, simplified technology, reduce cost, and can eliminate the internal diameter power of pump, make the pump running steadily, noise is little, characteristics such as long service life.

Fig. 1 is a general structure schematic representation of the present utility model.

Fig. 2 is the plan view of spiral case 22.

Fig. 3 is the side view of Fig. 2.

1 base among the figure, 2 long tubes are stifled, 3 sleeve nuts, 4 suction casings, 5 stage casings, 6 impellers, 7 " O " type seal ring, 8 irrigation pipe parts, 9 balancing pipeline parts, 10 stuffing box bodies, 11 short tubes, 12 Glands, 13 bearing (ball) covers, 14 electric machine supports, 15 coupling, 16 motors, 17 lubricating cups, 18 balancing drums, 19 roller bearing components, 20 balance sets, 21 discharging valves, 22 Spit Sections, 23 turnbuckles, 24 water sealing (sealing water) pipe parts, 25 seal rings, 26 middle cover, 27,28 plain bearing elements, 29 blank caps, 30 spiral cases, 31 helical flow paths.

Most preferred embodiment of the present utility model, as Fig. 1,2, shown in 3, a kind of vertical double volute water conservancy diversion centrifugal pump, it comprises standing part, rotating part, bearing part and hermetic unit, standing part is by suction casing 4, stage casing 5, Spit Section 22, base 1, stuffing box body 10, electric machine support 14 component such as grade form with Bolt Connection, wherein, the suction port of suction casing 4, the discharge opening of Spit Section 22 becomes 90 degree in the space, all become substantially horizontal, rotating part is by vertical axle 27 and be contained in several impellers 6 on the axle 27 and be used for the balancing drum 18 of balancing axial thrust and form, on the stage casing 5 stator is housed, feature of the present utility model is; The stage casing 5 and the stator of standing part are designed to overall structure, and forming the double volute deflector, this deflector is made of the spiral case 30 of two identical band helical flow paths 31, wherein, helical flow path 31 on the spiral case 30 is 180 ° of symmetrical distributions on spiral case 30 cross sections, shown in 1,2,3.

Claims (1)

1, a kind of vertical double volute water conservancy diversion centrifugal pump, it comprises standing part, rotating part, bearing part and hermetic unit, standing part is formed with Bolt Connection by component such as suction casing 4, stage casing 5, Spit Section 22, base 1, stuffing box body 10, electric machine supports 14, wherein, the discharge opening of the suction port of suction casing 4, Spit Section 22 becomes 90 degree in the space, all become substantially horizontal, rotating part is by vertical axle 27 and be contained in several impellers 6 on the axle 27 and be used for the balancing drum 18 of balancing axial thrust and form, on the stage casing 5 stator is housed, feature of the present utility model is; The stage casing 5 and the stator of standing part are designed to overall structure, and formation double volute deflector, this deflector is made of the spiral case 30 of two identical band helical flow paths 31, and wherein, the helical flow path 31 on the spiral case 30 is 180 ° of symmetrical distributions on spiral case 30 cross sections.

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