CN2355135Y - Miniature centrifugal pump made by metal plate die stamping and welding processes - Google Patents

Abstract

The utility model relates to a pump, particularly a miniature centrifugal pump made of metal plates through die stamping and welding processes. The utility model is composed of an inlet tube, an outlet tube, a back cover, a pump housing, an impeller, etc. and is characterized in that the pump housing is provided with a spiral type volute chamber with the cross section in an approximately semicircular shape, and the spiral type volute chamber is formed between the pump housing and the impeller through die stamping process and grows larger radially outwards gradually along the direction of liquid flow; the pump housing is also provided with the outlet tube and the inlet tube and can be connected with outer pipelines in multiple forms. Compared with a cast pump, the utility model has the advantages of decrease of three fourth of the weight, increase of 5-7% of the efficiency, large scale saving of the material and energy, reduction of one third of the cost and pollution reduction.

Description

Sheet metal it by punch and weld micro centrifugal pump

The utility model relates to a kind of pump, particularly a kind of micro centrifugal pump with the sheet metal it by punch and weld.

Centrifugal pump is the universal machine product of the big wide application of a kind of demand, is widely used in every field, and the manufacturing usual method of pump is a casting process, and casting process is a kind of power consumption height, and consumptive material is many, and labor intensity is big, environment is had the technology of pollution; For some parts of small flow micro centrifugal pump, the impeller narrow as exit width, that flow is little is then limit and can't be cast because of technology.Therefore, begin to develop and utilize sheet metal to make impeller by impact briquetting and the method that is welded to connect, become punching press welding micro centrifugal pump, more existing punching press pumps have only its wheel member to adopt the simple punching press of sheet metal, the projection welding moulding, and pump case still adopts casting, the shortcoming of original casting technique still can't fundamentally overcome, still have difficulty in process, technical performance is poor.

In view of this, how to make whole parts of micro centrifugal pump all can adopt it by punch and weld, reduce environmental pollution, alleviate working strength, improve labour productive forces' level, improvement by structure increases the intensity and the technical performance of the pump housing, increases substantially the operational efficiency of pump, and the utility model grinds wound motivation place just.

The utility model designer relies on the practical experience in fields such as being engaged in all kinds of stainless steel stamping products developments and the design of pump class for many years, on the basis of feasibility study repeatedly, does a brand-new design to constitute, and gets generation of the present utility model eventually.

At the deficiencies in the prior art, the purpose of this utility model provides the pump of a kind of whole employing punching press and welding procedure manufacturing, its have rational in infrastructure, intensity is high, the characteristics that operational efficiency is high, pump case have enough strength and stiffness to bear the pipeline active force and bear the micro centrifugal pump of internal pressure.

The purpose of this utility model can realize like this, the utility model is made of inlet tube, outer pipe, bonnet, pump case, impeller, it is characterized in that pump case has between a pump case and the impeller rammed one to increase gradually along liquid flow path direction, radially outward, section is the roughly screw type volute chamber of half garden shape; Adopt the sealing opening ring sealing between impeller eye and the pump case inlet; The inlet tube two ends connect respectively on the center hole of the inlet hole of pump case and support.

The purpose of this utility model can also further realize by following technical measures.

Pump case is provided with an outer pipe and an inlet tube, and outer pipe directly is connected with outlet conduit, and Connecting format can be by various ways such as screw threads, and inlet tube directly is connected with inlet pipeline, and Connecting format also can be by various ways such as screw threads.

Pump case is a spherical in the axial external surface that is connected with inlet tube; The groove that is symmetrically distributed more than two is arranged on the spherical, the internal surface and the support of groove are rigidly connected, to strengthen the intensity of pump, the sagittal plane of pump case is that a radially outward increases gradually, section is roughly half garden shape spiral line type, and to guarantee the hydraulic performance of pump case, such curvature changing makes that the sheet metal thickness of pump case pump case each several part when punching press is comparatively even, it is average to bear pipeline pressure, and the while pump case externally presents strength and stiffness and is in preferable state.

The outer pipe of pump case is in the top of pump case, and is simple in structure, practical reliable.

Impeller be by preceding impeller plate, back impeller plate and between the helical type blade of clamping constitute, can effectively improve the intensity of impeller blade, guarantee the hydraulic performance of pump.

Adopt the sealing opening ring sealing between impeller eye and the intake pipe inlet, the gap between impeller eye and the sealing opening ring is less than 0.5 millimeter, good sealing effect.

Pump is provided with bolt, opens water irrigating hole, is used for the pump prestart and intakes inward.

Pump case is provided with down bolt, and the opening water discharge hole is used for draining after the termination of pumping.

Pump case is provided with flange, directly is fixed on the motor.

In sum, the utlity model has following technical characterstic:

1, all centrifugal pump parts all adopt the punching press welding to form, technology is single, the metallic sheet material of 0.5-5 millimeter is manufactured whole parts of centrifugal pump, and than the casting pump, weight is equivalent to 1/4 of similar casting pump, efficient is than the high 5-7% of similar pump, cost is equivalent to 2/3 of similar pump, energy-saving material-saving, manufacturing efficiency height, avoid environmental pollution, reduce labor intensity; Sheet metal can be selected stainless steel materials for use, and is corrosion-resistant, the life-span is long, can carry the high viscosity slurry, can use in-40 ℃-180 ℃ acid, highly basic and other Korrosionsmediums.

2, overall construction design is ingenious, and the structural type of impeller has solved specific speed Ns and has been lower than 30, and the centrifugal pump of exit width 1-2 millimeter adopts the insurmountable difficult problem of casting technique; Stamping forming pump case thickness is even, is shaped as inhomogeneous, asymmetric snaillike housing, more meets the smoothness needs of fluid, adopts the sealing opening ring sealing between impeller eye and the intake pipe, and the sealing surface gap is less than 0.5 millimeter, good sealing effect.

3, the centrifugal pump casing strength and stiffness are all realized the optimum state, can bear maximum pipeline active force and internal pressure, and this structure is specially adapted to the micro centrifugal pump of small flow.

Fig. 1 is the organigram of the utility model centrifugal pump.

Fig. 2 is the pump housing organigram of the utility model centrifugal pump.

Fig. 3 is the utility model pump case moulding figure.

Fig. 4 is an outer pipe schematic representation of the present utility model.

Fig. 5 is the utility model impeller construction schematic representation.

Fig. 6 is the utility model impeller sectional drawing.

Fig. 7 is the utility model inlet tube schematic representation.

Referring to Fig. 1, the utility model is made of inlet tube 12, outer pipe 13, bonnet 15, pump case 6, impeller 5, it is characterized in that pump case 6 has strikes out one and increases gradually along liquid flow path direction, radially outward between a pump case 6 and the impeller 5, section is the roughly screw type volute chamber of half garden shape, and the outer pipe 13 that a garden shape is arranged, outer pipe 13 directly is connected with export pipeline, and Connecting format can connect by various ways such as screw threads; The outer pipe 13 of pump case is in the top of pump case 6, and is simple in structure, practical reliable.Pump housing center is provided with and motor 14 coaxial elongated pump shafts 1, impeller is that the helical type blade 22 by preceding impeller plate 20, back impeller plate 21 and middle clamping thereof constitutes, the convex surface contact welding connects into narrow path impeller, and utilizes impeller cover mother 4 to be fixed on key 3 places that axle is provided with; Adopt sealing opening ring 23 sealings between impeller eye, the pump case inlet, the sealing surface gap of static and dynamic sealing is less than 0.5 millimeter, good sealing effect; Bonnet 15 centers are by pump shaft 1, be provided with and the direct coupled flange of motor with pump case 6, by bolt and be lined with O-ring seals 14 fit sealings and motor 16 fixing in the lump, adopt mechanical seal 2 sealings between bonnet 15 and the axle 1, be connected with inlet ductwork by multiple Connecting format such as screw threads with inlet tube 12.Pump case 6 is a spherical in the axial external surface 31 that is connected with inlet tube 12; The groove 33 that is symmetrically distributed more than two is arranged on the spherical 31, to strengthen the intensity of pump, the sagittal plane 32 of pump case is that a radially outward increases gradually, section is the roughly spiral line type of half garden shape, to guarantee the hydraulic performance of pump case, such curvature changing makes that the sheet metal thickness of pump case pump case each several part when punching press is comparatively even, and it is average to bear pipeline pressure, and the while pump case externally presents strength and stiffness and is in preferable state.Pump case is provided with bolt 9, is lined with rubber washer 10 sealing, is connected with nut 11 in the pump case, is used for the pump prestart and pours water inward.The pump housing is provided with down bolt 17, is used for draining after the termination of pumping.

In sum, the utility model provides a kind of structure of feasible process, and effect is obvious, and is rational in infrastructure, the micro centrifugal pump of the sheet metal it by punch and weld of function admirable.Obviously the utility model is a kind of novelty, progress and the new design with practicability.The above is this novel specific embodiment and the know-why of being used, do not departing from the equivalence change that principle of the present utility model is done, when the function that it produced does not exceed spiritual that specification and accompanying drawing contain yet, all should be in scope of the present utility model, explanation hereby.

Claims (9)

1, a kind of sheet metal it by punch and weld micro centrifugal pump, constitute by inlet tube (12), outer pipe (13), bonnet (15), pump case (6), impeller (5), it is characterized in that pump case (6) has strikes out one and increases gradually along liquid flow path direction, radially outward between a pump case (6) and the impeller (5), section is the roughly screw type volute chamber of half garden shape; Adopt sealing opening ring (23) sealing between impeller eye and the pump case inlet; Inlet tube (12) two ends connect respectively on the center hole of the inlet hole (18) of pump case (6) and support (7).

2, sheet metal it by punch and weld micro centrifugal pump according to claim 1 is characterized in that pump case (6) is a spherical in the axial external surface (31) that is connected with inlet tube (12); The sagittal plane of pump case (32) is the profile that a radially outward increases gradually, and section is roughly half garden shape spiral line type.

3, sheet metal it by punch and weld micro centrifugal pump according to claim 1 is characterized in that pump case (6) is provided with an outer pipe (13) and an inlet tube (12).

4, sheet metal it by punch and weld micro centrifugal pump according to claim 1 is characterized in that the outer pipe (19) of pump case (6) is in locating vertically upward of pump case (6).

5, sheet metal it by punch and weld micro centrifugal pump according to claim 1, it is characterized in that impeller (5) be by preceding impeller plate (20), back impeller plate (21) and between clamping helical type blade (22) constitute.

6, according to claim 1 or 3 described sheet metal it by punch and weld micro centrifugal pumps, it is characterized in that outer pipe (13) and outlet conduit can be by being threaded, inlet tube (12) also can be by being threaded with inlet pipeline.

7, sheet metal it by punch and weld micro centrifugal pump according to claim 2 is characterized in that having on the spherical (31) groove (33) that is symmetrically distributed more than two.

8, sheet metal it by punch and weld micro centrifugal pump according to claim 1 is characterized in that pump is provided with bolt (9) and following bolt (17).

9, sheet metal it by punch and weld micro centrifugal pump according to claim 1 is characterized in that pump case (6) is provided with flange.

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