CN86208470U

CN86208470U - Vertical liquid pump (under liquid level outside accumulator tank)

Info

Publication number: CN86208470U
Application number: CN 86208470
Authority: CN
Inventors: 戴正兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-30
Filing date: 1986-12-30
Publication date: 1987-09-02

Abstract

The utility model relates to a liquid centrifugal pump which is positioned outside the medium accumulator tank and under the liquid level, and which is used for conveying the medium, such as liquid, etc. The utility model is characterized in that the upper part of the main shaft is installed a composite upper bearing device which replaces the liquid bearing. The casing tube of the main shaft is provided with a return conduit, which causes the remaining liquor and the gas to flow back to the accumulator tank at any time. The contact part between the pump case, the impeller, the main shaft, etc., and the medium is coated with the corrosion preventive material. A pump bracket is matched, which is convenient to adjust and move. The utility model has the advantages of no leakage, long service life, corrosion prevention, convenient installation and maintenance, suction capacity, and convenient start. Besides, the utility model is suitable for the petroleum industry, the chemical industry, the textile industry, the three waste treatment industry, the wet spinning method smelting, etc.

Description

Vertical liquid pump (under liquid level outside accumulator tank)

The utility model relates to liquid transporting apparatus, is a kind of being placed in below the liquid level of medium storage tank outside, adopts inversion blade wheel structure, suction port to place the submerged centrifugal pump of impeller top.

In order to carry liquid or to contain the universal centrifugal pump of solid particle slurries, horizontal pump and vertical pump two classes are arranged with its form difference.The shortcoming that causes of these pumps is seepages, particularly carries the pump of corrosive liquids, and owing to pump case, impeller, axle seal the corrosion that part can be subjected to fed sheet of a media, use soon the evaporating, emitting, dripping or leaking of liquid or gas phenomenon will take place, even damage, has a strong impact on the working life of pump.In industries such as oil, chemical industry, weaving, three wastes processing, plating, hydrometallurgy, because of will from hopper, carrying corrosive liquids or slurries by Chou Qu And, should not use horizontal pump, also should not adopt common (main shaft is moved in short pass) vertical pump, and adopt Under Water Pumps.Existing Under Water Pumps is mostly made ， And with metallic material and in order to reduce the corrosion to bearing arrangement, main shaft bearing is designed on the top of liquid level, and in the lower end of main shaft the liquid guide bearing is set.Such Under Water Pumps soaks foam in medium because of the entire pump unit, solved the leakage problems of pump, but pump assembly is corrosion and damage very easily just, but also brought impeller to be subjected to periodic radial force effect, cause the wearing and tearing aggravation of lower end liquid guide bearing, even cause impeller or pump housing friction and damage, so that influence pump performance and life-span.

The purpose of this utility model is for a kind of improved Under Water Pumps is provided, it is placed in medium storage tank outside, relative position is below liquid level, the part in addition of contact liq and overcurrent part all adopts extraordinary corrosion resistant metal in the pump, nonmetallic material such as lined with fluoroplastic material or rubber are to prevent the corrosion of medium to pump assembly.And and pump case, main shaft supporting system and medium inlet system done new design is to improve the performance of entire pump system.

Composition of the present utility model can be divided into pump assembly, import piping, three main parts of axis system.Pump assembly comprises pump case, the impeller of being made up of the pump housing and pump cover, in the design, to miniature pump, the housing of pump case adopts Double-spiral whole or packaging, to big-and-middle-sized pump, the pump housing of pump case adopts diffuser and annular outer cover to form the stator formula pump housing, and they all have outer pipe.Metal shell to the packaging pump housing adopts the structure of subdivision vertically.Such structure has just been eliminated the effect of the periodicity asymmetric radial force that pump produces in the running and has been convenient to loading and unloading.Pump case can directly be cast and the gold machining shaping with common metal or Dead Mild Steel alloy material, also available common metal material is cast as the surperficial multiple macromolecule engineering plastics of lining, rubber material or the retinite ink material gone up of basic shape And within it and forms, also available high-class stainless steel, macromolecule engineering plastics or rubber are made inner piece, assemble with the shell of the axial subdivision of common steel.Particularly the whole or packaging pump case of a kind of liner in back can prevent the corrosion of medium to the metal pump case at the pump case internal surface that contacts with aggressive medium, and then the matrix of pump case just can adopt the cheap metallic material of price comparison.Impeller design in the pump assembly adopts the open type of band back blade or the inversion blade wheel structure of enclosed, this impeller can be cast and the gold machining shaping with extra low carbon alloy steel material or common metal material, also can be cast as basic shape with the common metal material earlier, And forms at the multiple macromolecule engineering plastics of its outer surface lining, rubber material or resin graphite.In order to adapt to the needs that rotating speed is the operating mode more than 1500 rev/mins, the design can adopt and pay impeller, pay stator and oil sealing and location plain bearing element at pump assembly lower end addition one enclosed lower bearing equipment.An end of paying one pair of axle sleeve of rotary axle box of impeller is connected with main shaft by bolt, and the other end of axle sleeve is contained in the sliding bearing of location, to guarantee running up of pump.The import piping of this Under Water Pumps comprises suction pipe and reflow pipe.The suction pipe design is on the top of pump case, promptly on the top of impeller, it comprise one section with the main shaft concentric delay into section and an inner ring of encircling for protection, with relax and the balance media Radial Flow to the impact force of main shaft, this mode that medium is flowed into from the impeller top, make and be micro-vacuum state in the pipeline of upper impeller, this has under the lower situation of foaming liquid and suction head conveying, because of there being surplus liquid to exist in this pump all the time, so have certain suction capacity, bubble can upwards return hopper by reflow pipe simultaneously.The design's reflow pipe is contained in the top of main spindle quill, and position and the highest liquid level of hopper adapt, and its effect is the medium that remains in the main spindle quill or gas to be got back in the hopper go, and this has just guaranteed that from structure spindle bearing structure does not contact with medium.The axis system of this Under Water Pumps comprises main shaft, main spindle quill, axle sleeve and bearing, axle envelope and locking nut.Main shaft is that a major axis, main shaft top and axle sleeve are slippery, lower end dress impeller.When being designed to high rotating speed when using water pump, this main shaft lower end is removed and impeller outer is installed the outside lower bearing equipment of enclosed of concentric with it also is housed; Pay the impeller of paying that is equipped with on the axle sleeve as dynamic seal, the other end of paying axle sleeve matches with the location sliding bearing, will pay axle sleeve by stay bolt and connect with main shaft is concentric, and the body of sliding bearing joins by flange and pump cover.Casing diameter promptly has a spacing greater than the main shaft diameter between main shaft and main spindle quill, this sleeve pipe upper end has flange to be connected with pump bracket, and there is be connected with pump case ， And and also be connected to a reflow pipe on this sleeve pipe top of flange the lower end.The design's bearing part is contained in main shaft top, it is one group of packaging bearing part, be that Bearing Installation puts at major axis, pack in the lump in the bearing support, by the end cap adjusting play, this device major axis cover is joined Lian Jie ， And with the main shaft cunning and by locking nut bearing part is fixed in main shaft Shang ， And nationality to regulate the axial clearance of pump.For stoping medium steam or gas to enter bearing arrangement or excessive, the design also can be provided with one group and pay the wheel dynamic sealing device in the bearing part bottom, make that any gas or the steam in the medium all can not enter bearing arrangement and excessive, reaches the requirement of not leaking.Above-described suction pipe, reflow pipe, main shaft, main spindle quill etc., require all can make according to different fed sheet of a media of common metal material or extra low carbon alloy steel material, also available common metal material is as matrix, and And serves as a contrast multiple macromolecule engineering plastics or materials such as rubber or resin graphite at the surface portion that is contacting with medium.For reaching hopper the purpose of this type of pump is installed outward, the design has one group of adjustable height, position-movable pump bracket, this vertical submerged pump is installed on this pump bracket, and the height of regulating pump suction pipe according to the exit position of hopper joins with it, so installation and maintenance are just quite convenient.

The utility model has the advantages that since the spindle support structure Position Design on medium liquid level top, on main spindle quill, be provided with reflow pipe, And has set up dynamic sealing device, so this Under Water Pumps does not have the shaft sealing leakage phenomenon; Be inverted blade wheel structure because this pump adopts, add in the pump full of liquid all the time, this pump just has suction capacity and is convenient to and starts; There is one section to delay into section and an inner ring of encircling for protection in the suction pipe, then eliminated the fashionable additional radial impact power of MEDIA FLOW main shaft; Because the pump housing of pump case is the stator pump housing that stator and annular outer cover are formed, whole or packaging Double-spiral pump housing And is at rotating speed during greater than 1500 rev/mins, adopted enclosed to pay the outside lower bearing equipment of impeller seals, set up the lower support point of cantilever major axis, this has just eliminated the effect of the inhomogeneous radial force of periodicity in the pump running on the one hand, thereby just cancel the guide water bearing structure, in addition the aspect has guaranteed the longer stability of cantilever major axis in high speed operation, and the maintain and replace pump housing and impeller are just easily; Owing to adopted the packaging bearing structure of main shaft, made the very convenient ， And of installation and maintenance guarantee that main shaft can not damage because of the mounting or dismounting bearing.Thereby improve price expensive main shaft working life; Because the utility model is an external, this has just eliminated the corrosivity of pump outer surface, from using the corrosion fatigue life that has significantly improved pump.

Description of drawings:

Fig. 1 is a longitudinal profile diagrammatic sketch of the present utility model.Wherein: (1) is impeller, and (2) are the pump housing, and (3) are the pump bottom, (4) be bottom liner lid, (5) are diffuser, and (6) are annular outer cover, (7) be discharge tube, (8) for delaying into section, (9) are for protecting an inner ring, (10) be suction pipe, (11) are main shaft, and (12) are main spindle quill, (13) be reflow pipe, (14) are top dynamic seal device, and (15) are bearing, (16) be axle sleeve, (17) be bearing cap, (18) are bearing support, and (19) are pump bracket, (20) be the pump loam cake, (21) be main shaft upper end locking nut, (22) are the stuffing box body, and (23) are middle cover, (24) for paying impeller, (25) are for paying stator.

Pump case---the pump housing is whole double helical configuration diagram to Fig. 2 for the utility model is another kind of.

Fig. 3 is the third pump case form of the utility model---the pump housing is the multiple double helix schematic representation of liner.Wherein: (26) are interior hub plate, and (27) are removable shell.

Fig. 4 is the pump shell structure schematic representation of the outside lower bearing equipment of band enclosed of the present utility model.Wherein: (28) for paying stator, (29) for paying impeller, (30) are oil sealing, and (31) undertake first for sliding axle, and (32) undertake second for sliding axle, and (33) for paying axle sleeve, (34) are stay bolt, and (35) are plain bearing housing, and (36) are shaft seal cover.

The utility model is described in further detail below in conjunction with the accompanying drawing illustrated embodiment.

Figure 1 shows that an embodiment of the present utility model, it is that a kind of rotating speed is at the large and medium-sized vertical externally-arranged type Under Water Pumps below 1500 rev/mins.As shown in the figure, entire pump system dress seat is on pump bracket (19), but pump bracket is a Ke Yi Dong And up-down adjustment height, so that the hopper exit position of suction pipe of pump (10) and different heights joins.The pump bracket supporting surface is motor and bearing arrangement with top, is main spindle quill (12) with the bottom, reflow pipe (13), pump case and impeller.Pump case is by the pump loam cake (20) that has suction pipe (10) in the present embodiment, the pump housing (2) and the pump bottom (3) that have discharge tube (7), be made up of diffuser (5) and annular outer cover (6), bottom liner lid (4) composition.Suction pipe (10) comprises that one section half-spiral spiral case delays into section (8), and this interior ring that delays section into is for protecting an inner ring (9), and such absorption pipe structure, the medium that makes inflow be direct radial impact main shaft and comparatively in the uniform and stable ground inflow impeller (1).Have a discharge tube (7), by the stator pump housing that diffuser (5) and annular outer cover (6) are formed, eliminated the effect of the asymmetric radial force of periodicity that pump produces in the running, so radial wobble can not take place in main shaft (11) lower end to main shaft (11).The impeller of present embodiment (1) is the inversion unshrouded impeller of band back blade, is fixed on the main shaft (11) with nut, and medium flows into from the top of impeller.Main shaft (11) only at an upper portion thereof with the bearing arrangement supporting, forms the cantilever main shaft of an end bearing.Bearing arrangement is made up of axle sleeve (16), bearing (15), bearing cap (17) and bearing support (18).Axle sleeve (16) and main shaft (11) be sliding joins and links ， And and with locking nut it is fixed on main shaft Shang ， And nationality and helps part gap in the locking nut adjusting pump.Shown in figure, axle sleeve (16), bearing (15) and bearing support (18) are formed combined upper bearing equipment, as long as such device is taken the screw that bearing support (18) is connected with pump bracket (19) and the locking nut (21) of main shaft upper end apart, just can remove whole bearing means from main shaft (11).For the steam that stops fed sheet of a media or gas medium is excessive or upwards invade upper bearing equipment, be equipped with one by paying impeller (24), paying the dynamic seal device that stator (25), middle cover (23) and stuffing box body (22) are formed in the bottom of bearing support (18), pay impeller (24) and be contained on the main shaft (11).When such sealer rotates with main shaft (11) when a pair impeller, just the effluent air that makes progress is pushed back, flow into hopper by reflow pipe (13).Know by accompanying drawing 1, main spindle quill (12) is a hollow tubular that two ends are flanged, top is connected with reflow pipe (13), upper flanges links to each other with pump bracket (19), following end flange links to each other with last pump cover (20), its diameter is greater than the main shaft diameter, form a gap, allow liquid, air communication cross and enter reflow pipe.More than said main shaft (11), the pump loam cake (20) that suction pipe (10) is arranged, the pump housing (2), bottom liner lid (4) and impeller (1),, serve as a contrast at the surface portion that contact with medium and to answer fluoroplastic and make as matrix with the common metal material.

Another embodiment of the present utility model as shown in Figure 2, it is that a kind of rotating speed that is used for is at the minitype vertical type externally-arranged type Under Water Pumps below 1500 rev/mins.Its structure and the foregoing description are basic identical, difference be suction pipe (10) to delay into section (8) be that annular is delayed into section.The pump housing (2) is the whole two spiral shell shell pump housings that have discharge tube (7).The pump loam cake (20), the pump housing (2), bottom liner lid (4) and the impeller (1) that have suction pipe (10) are made with the extra low carbon alloyed steel.

The 3rd embodiment of the present utility model as shown in Figure 3, it also is a kind of vertical externally-arranged type Under Water Pumps that is used for rotating speed in the complete series performance of centrifugal pump below 1500 rev/mins, its structure and last embodiment are basic identical, and difference is that the Double-spiral pump housing (2) of pump case is made up of the outer pump case (27) of metal of hub plate (26) and axial subdivision in the Double-spiral of multiple rubber of lining or retinite ink material.Impeller (1) is made the closed type structure ， And of band back blade at the multiple rubber material of its surface lining.At this moment, the contacted surface of other part and fed sheet of a media also serves as a contrast multiple rubber material.

The 4th embodiment of the present utility model as shown in Figure 4, it is the vertical externally-arranged type Under Water Pumps when the utility model is used for rotating speed and is 1500 rev/mins～3000 rev/mins, its structure material is all identical with first three embodiment, difference is that the outside lower bearing equipment of a cover enclosed is housed in pump bottom (3) bottom, it is by paying stator (28), pay impeller (29), oil sealing (30), sliding axle is undertaken first (31), sliding axle is undertaken second (32), pay axle sleeve (33), stay bolt (34), plain bearing housing (35) and shaft seal cover (16) are formed.Its structure is put a pair axle sleeve (33) concentric with main shaft (11) for the lower end at main shaft (11) connects by stay bolt (34), pay axle sleeve (33) and pay impeller (29) and sliding axle and undertake second (32) cunning and join and be connected, sliding axle is undertaken first (31) and is pressed into bearing support (35), the oil sealing (30) of packing into, bearing support (35) is fastening by screw and following pump cover (3), the lower end seals up with shaft seal cover (36), the outside lower bearing equipment of whole formation enclosed.

Claims

1, a kind of vertical externally-arranged type Under Water Pumps of carrying liquid, gas-liquid mixed media, band solid particle slurries, comprise pump case, impeller [1], suction pipe [10], discharge tube [7] that motor, coupling, main shaft [11], main spindle quill [12], bearing arrangement, the pump housing [2] and pump cover [3] are formed, it is characterized in that:

A) bearing arrangement is that the combined type upper bearing equipment of being made up of axle sleeve [16], bearing support [18], bearing [15], bearing cap [17] is set on main shaft [11] top,

B) suction pipe [10] comprise one section with main shaft [12] concentric delay into section [8], this delays into and also to be provided with the inner ring [9] of encircling for protection in the section,

C) the stator pump housing of the pump housing of pump case [2] for having discharge tube [7], forming by stator [5] annular outer cover [6],

D) reflow pipe [13] with the highest liquid level corresponding height of hopper is housed on main spindle quill [12] top, the outlet end of this reflow pipe feeds hopper,

E) said impeller [1] is the inversion impeller of a band back blade,

F) it also comprises one group of adjustable for height pump bracket [19] that moves.

2, Under Water Pumps according to claim 1 is characterized in that the bottom of the bearing support (18) in the said upper bearing equipment is equipped with one by paying impeller (24), paying the dynamic seal device that stator (25), middle cover (23) and stuffing box body (22) are formed.

3, Under Water Pumps according to claim 1, it is characterized in that said inlet tube (10) to delay into section (8) be that half-spiral delays into section.

4, Under Water Pumps according to claim 1, it is characterized in that said inlet tube (10) to delay into section be that annular is delayed into section.

5, Under Water Pumps according to claim 1 is characterized in that the said pump housing (2) is the packaging symmetric double screw type pump housing.

6, Under Water Pumps according to claim 1 is characterized in that the open architecture of said impeller (1) for the band back blade.

7, Under Water Pumps according to claim 1 is characterized in that the closed type structure of said impeller (1) for the band back blade.

8, Under Water Pumps according to claim 1, it is characterized by said main shaft (11) lower end pair axle sleeve (33) of concentric with it is housed, be equipped with on it as dynamic seal pay impeller (29) and sliding axle is undertaken second (32), this sliding axle is undertaken second and sliding axle and is undertaken first (31) and match.

9,, it is characterized in that said main shaft (11), have pump loam cake (20), the pump housing (2), bottom liner lid (4), the impeller (1) of suction pipe (10) to make with the extra low carbon alloyed steel according to claim 1 or 2,3,4,5,6,7 described Under Water Pumpss.

10, according to claim 1 or 2,3,4,5,6,7 described Under Water Pumpss, it is characterized in that said main shaft, pump loam cake (20), the pump housing (2), bottom liner lid (4), impeller (1) that suction pipe (10) is arranged, can be according to the medium character difference,, make as matrix with the common metal material at the multiple high molecule plastic of surface portion lining, rubber, the retinite ink material that contact with medium.