CN105697414A

CN105697414A - High-cleanliness centrifugal pump

Info

Publication number: CN105697414A
Application number: CN201610273545.9A
Authority: CN
Inventors: 项少聪
Original assignee: SHANGHAI YUANAN LIQUID EQUIPMENT CO Ltd
Current assignee: SHANGHAI YUANAN LIQUID EQUIPMENT CO Ltd
Priority date: 2016-04-28
Filing date: 2016-04-28
Publication date: 2016-06-22

Abstract

The invention discloses a high-cleanliness centrifugal pump which comprises a motor component and a pump body component, wherein the output shaft of the motor in the motor component is fixedly connected with the pump shaft in the pump body component; the pump shaft is fixed and in sealing connection with an impeller so as to drive the impeller to rotate to generate centrifugal force; the pump body component further comprises a pump body bracket, a pump separation disc and a pump head, wherein the rear end of the pump body component is fixedly arranged relative to the motor component; the pump separation disc is arranged at the front end of the pump body bracket; the pump head is fixedly arranged relative to the pump separation disc; a space for accommodating the impeller is formed between the pump head and the pump separation disc; the impeller, the pump head and the pump separation disc are formed in a forging manner; the impeller, the pump head and the pump separation disc are formed in a forging manner.

Description

A kind of high-cleanness centrifugal pump

Technical field

The present invention relates to centrifugal pump technical field, be specifically related to a kind of high-cleanness centrifugal pump that disclosure satisfy that medicine, food service industry user demand。

Background technology

For pharmacy, daily-use chemical industry, centrifugal pump in the industries such as fluid food, except needing the pumpability of pump is claimed, also often the clean health aspect of centrifugal pump there are some special requirements, the quality of final products is had influence on to prevent material from producing secondary pollution in pumping procedure, but owing to the Research Emphasis of major part pump industry is typically located at the cavitation resistive property of efficiency and the pump how improving pump, and how to reduce the aspects such as manufacturing cost, so usually ignore the details of the clean health aspect of pump。

Chinese patent CN2039061U discloses a kind of super abrasive centrifugal pump with mechanical seal, this centrifugal pump includes the pump housing, impeller, support, pump postoperculum, mechanical seal, rotate axle, clamp flange, motor, charging aperture and discharging opening, support side is docked with the flange of motor, rotate axle and be installed in the centre bore of support, rotate axle one end and be directly socketed the use corresponding cooperation of clamp flange with the axle of motor, rotation axle in support is installed mechanical seal, support opposite side connects pump postoperculum, the pump housing is corresponding with pump postoperculum to be connected, impeller is arranged on the rotation axle other end and is positioned among pump postoperculum and the pump housing, the pump housing sets charging aperture and discharging opening, it is monolithically fabricated super abrasive centrifugal pump with mechanical seal。The arranging of this centrifugal pump with mechanical seal ruggedness and cavitation resistive property have been considered only, its structural design makes the liquid being pumped easily enter into from pump head component in electric machine assembly, or remain in pump head component, thus result in its clean-up performance can not meet the requirement of food service industry and pharmaceutical industry。

Summary of the invention

Therefore, the technical problem to be solved in the present invention is in that the requirement that overcomes centrifugal pump of the prior art can not meet medicine, food service industry cleanliness factor。

For solving above-mentioned technical problem, the present invention provides a kind of high-cleanness centrifugal pump, including:

Electric machine assembly and pump assembly, the output shaft of the motor in described electric machine assembly is fixing with the pump shaft in described pump assembly to be connected, and described pump shaft and described impeller are fixed and be tightly connected, thus driving described impeller to rotate form centrifugal force；

Described pump assembly also includes:

Pump housing support, its rear end and described electric machine assembly are relatively fixed setting；

Pump, every dish, is arranged on the front end of described pump housing support；

Pump head, the relatively described pump of described pump head is fixedly installed every dish, and and described pump formed between dish for holding the space of described impeller；

Described impeller, described pump head and described pump are forging molding every dish。

In above-mentioned high-cleanness centrifugal pump, on described pump head, molding is for the runner of pumping liquid, and described runner is circular arc。

In above-mentioned high-cleanness centrifugal pump, described runner is volute shape runner。

In above-mentioned high-cleanness centrifugal pump, described pump head include with described pump every dish be connected be arranged on the flange of described pump head rear end, taper suction casing that the opening for sucking liquid narrows gradually and the diffusion deferent segment that the opening for output liquid amplifies gradually。

In above-mentioned high-cleanness centrifugal pump, also including mechanical seal, described pump is provided with the screwed hole of the stationary ring connected in described mechanical seal, the rotating ring in described mechanical seal and the linkage of described pump shaft on dish。

In above-mentioned high-cleanness centrifugal pump, the screwed hole that described pump is arranged on dish is trans screwed hole, and the screw thread on described stationary ring is trans screw thread。

In above-mentioned high-cleanness centrifugal pump, also including end elongation moulding has the shaft end nut of cover plate, and institute's shaft end nut is threadeded with described pump shaft, and described cover plate compresses described impeller。

In above-mentioned high-cleanness centrifugal pump, the end face that described impeller is corresponding with described cover plate forms cannelure, in described cannelure, is provided with O-ring seal。

In above-mentioned high-cleanness centrifugal pump, the angle between described taper suction casing and described diffusion deferent segment is 90 ° or 45 °。

In above-mentioned high-cleanness centrifugal pump, between described output shaft and described pump shaft, two collars by being oppositely arranged are connected, described collar has the endoporus gradually tapered up, by several bolt assemblies, two collars are connected, in connected state, two collars are resisted against on described pump shaft on the obliquity prominence platform of molding。

Technical solution of the present invention, has the advantage that

In forging high-cleanness centrifugal pump provided by the invention, impeller, pump head and pump are respectively adopted the mode molding of forging every dish, compared to stamping parts, the thickness of forging, intensity and molecular density are all of a relatively high, therefore the impeller of forging molding, pump head and pump can obtain relatively low roughness after processing every dish, so the liquid of pumping is just not easy to accumulate on dish at impeller, pump head and pump, thus avoiding bacteria breed；On the other hand, having benefited from forging and be obtained in that relatively low roughness, when cleaning, the liquid of residual is easily removed in pump assembly。Simultaneously, forging is compared to stamping parts, its thickness is more suitable for gold pin processing or grinding, and stamping parts is limited to its material thickness, then can not carry out gold and cut processing, therefore gold cut processing after forging surface roughness can enter far below stamping parts so that impeller, pump head and pump are brighter and cleaner every the surface of dish, not only liquid is not easy to accumulate, and also very easily removes when cleaning；It is additionally, since forging to carry out gold and cut processing, therefore for pump every dish, it is possible to the perforate being connected with pump shaft on it controlled as, in the best Space Interval of sealing, hence helping to improve the service life of electric machine assembly。Additionally, due to the molecular density of forging is higher relative to stamping parts, therefore, the pump assembly being mainly made up of forging on service life relatively longer with the pump assembly using stamping parts to make。

Accompanying drawing explanation

In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。

Fig. 1 is the cross-sectional schematic of the high-cleanness centrifugal pump of the present invention；

Fig. 2 is the front view of the pump head of the present invention；

Fig. 3 is the Fig. 2 sectional view along A-A face；

Fig. 4 is the front view of the impeller of the present invention；

Fig. 5 is the side view of Fig. 4。

Description of reference numerals:

11-output shaft；21-impeller；22-pump housing support；23-pump is every dish；24-pump head；25-pump shaft；3-mechanical seal；33-shaft end nut。

Detailed description of the invention

Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。

In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention。Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or hint relative importance。

In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals。For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention。

As long as just can be combined with each other additionally, technical characteristic involved in invention described below difference embodiment does not constitute conflict each other。

Embodiment 1

High-cleanness centrifugal pump below in conjunction with-3 pairs of the present embodiment of Fig. 1 is described in detail, the high-cleanness centrifugal pump of the present embodiment mainly includes electric machine assembly and pump assembly, wherein the Main Function of electric machine assembly is output power, thus driving pump assembly action, to form the centrifugal force that can pump liquid。Wherein pump assembly mainly includes fixing the pump housing support 22 of connection with electric machine assembly, such as pump housing support 22 can be through flange and is fixedly connected on the shell of electric machine assembly, the housing of pump housing support 22 preferably tubular, first end of output shaft 11 and pump shaft 25 is fixing inside pump housing support 22 to be connected, second end of pump shaft 25 then passes pump every dish 23, pump is fixed every dish 23 connect preferably in marginal position and pump housing support 22, so that pump can not pass through pump every dish 23 every the liquid of dish 23 opposite side, enter into the space in pump housing support 22。The side opposing with pump housing support 22 on dish 23 of pump is provided with impeller 21, impeller 21 is set on pump shaft 25 by centre bore thereon, and be relatively fixed with pump shaft 25 and to be connected, so that when output shaft 11 drives pump shaft 25 action, pump shaft 25 can drive impeller 21 to rotate。Preferred specifically as one, the output shaft 11 of electric machine assembly and the pump shaft 25 of pump assembly are fixing connections, as seen from Figure 1, between output shaft 11 and described pump shaft 25, two collars by being oppositely arranged are connected, described collar has the endoporus gradually tapered up, two collars being connected by several bolt assemblies, in connected state, two collars are resisted against on described pump shaft 25 on the obliquity prominence platform of molding。

In order to prevent liquid from entering in electric machine assembly from link position, affecting motor normal operation or reduce its service life, meanwhile, liquid accumulates in pump assembly and all easily produces antibacterial in electric machine assembly, makes the cleannes of centrifugal pump decline。The liquid being necessary for ensureing in pump assembly can not enter in electric machine assembly, and in other words, the pump liquid every dish 23 side can not pass through pump on dish 23 for passing through in the hole for pump shaft 25 traverse。Only in this way the high-cleanness centrifugal pump of the present embodiment can meet the requirement of high-cleanness, to be suitable for meeting the use such as food service industry, medical industry。

For in the pump assembly of this present embodiment, impeller 21, pump head 24 and pump are respectively adopted the mode molding of forging every dish 23。Aforesaid way is the core technology scheme of the present embodiment, compared to stamping parts, the thickness of forging, intensity and molecular density are all of a relatively high, therefore the impeller 21 of forging molding, pump head 24 and pump can obtain relatively low roughness after processing every dish 23, such as roughness can reach Ra0.4, so the liquid of pumping is just not easy to accumulate on dish 23 at impeller 21, pump head 24 and pump, thus avoiding bacteria breed；On the other hand, having benefited from forging and be obtained in that relatively low roughness, when cleaning, the liquid of residual is easily removed in pump assembly。Simultaneously, forging is compared to stamping parts, its thickness is more suitable for gold pin processing, and stamping parts is limited to its material thickness, then can not carry out gold and cut processing, therefore gold cut processing after forging surface roughness can enter far below stamping parts so that impeller 21, pump head 24 and pump are brighter and cleaner every the surface of dish 23, not only liquid is not easy to accumulate, and also very easily removes when cleaning；It is additionally, since forging to carry out gold and cut processing, therefore for pump every dish 23, it is possible to the perforate being connected with pump shaft 25 on it controlled as, in the best Space Interval of sealing, hence helping to improve the service life of electric machine assembly。Additionally, due to the molecular density of forging is higher relative to stamping parts, therefore, the pump assembly being mainly made up of forging on service life relatively longer with the pump assembly using stamping parts to make。

The set-up mode of pump head 24 in the present embodiment is described in detail below in conjunction with Fig. 3:

Pump head 24 forms the runner for pumping liquid, pump head 24 include for pump every dish 23 be connected and the flange that is arranged on pump head 24 rear end, also include taper suction casing and diffusion deferent segment, wherein one end of taper suction casing connects described runner, and for sucking the taper suction casing (not shown) of liquid, namely described taper suction casing is that its opening portion is comparatively narrow, and the structure that inside diameter amplifies gradually；One end of described diffusion deferent segment connects described runner equally, and the structure of diffusion deferent segment and taper suction casing is on the contrary, it is opening portion is relatively large in diameter, and inside gradually tapers up。Wherein, the angle between taper suction casing and described diffusion deferent segment is 90 °。

As one preferred embodiment, runner is Scroll runner, and the structure of Scroll makes runner be prone to by metalworking molding so that the roughness in pump head 24 is lower, and surface is brighter and cleaner。Further, the runner of Scroll easily by pumping liquid changes mechanical energy for extrude can, improve pump head 24 tubeability, further combined with diffusion deferent segment structure arrange so that be pumped liquid be easier to output。Further arrange in conjunction with the structure of described taper suction casing so that the liquid of suction can possess certain flow velocity。

But it should be recognized that the structure of runner is not limited only to be that Scroll is a kind of, in order to make its surface not easily accumulate liquid, it is only necessary to runner is the linear type runner of less bending, or the circular arc runner that central angle is bigger, in this illustration that then differs。

The set-up mode of mechanical seal 3 in the present embodiment is described in detail below in conjunction with Fig. 1:

In order to make pump shaft 25 and the pump gap between dish 23 be sealed, mechanical seal 3 is preferably arranged on pump between dish 23 and pump shaft 24 by the present embodiment。Wherein stationary ring is threaded in pump screwed hole on dish, and rotating ring and pump shaft 25 are connected, for instance pin joint etc.。And it is preferred that, the screwed hole that pump is arranged on dish 23 is trans screwed hole, screw thread on stationary ring is trans screw thread, the setting of the shaft end nut 33 of cover plate is had in combination with end elongation moulding, make the spring in mechanical seal 3 with fluid then entirely without contacting, mechanical seal 3 is fluid affected little when pump runs up, so that mechanical seal is more stable, the life-span more lengthens。Specifically, shaft end nut 33 is threadeded with described pump shaft 25, and described cover plate compresses described impeller 21 and described pump head 24。

It should be noted that, mechanical seal 3 can select single-end sealed or both-end sealing, and both-end water injection type can be adopted in classification to seal and steam isolating seal, and the form that implements of mechanical seal 3 can be selected by those skilled in the art as described above。

Embodiment 2

The present embodiment is the improvement on embodiment 1 basis, its relative to embodiment 1 the difference is that, in the high-cleanness centrifugal pump of the present embodiment, the angle between taper suction casing and described diffusion deferent segment is 45 °, so arranging and be advantageous in that, pump head 24 can adapt to SIP and cleans。Angle between obvious taper suction casing and described diffusion deferent segment can also is that 60 °, 70 ° etc., and those skilled in the art can carry out the selection of concrete numerical value according to actual user demand, does not then repeat one by one at this。

In the present embodiment, impeller 21 is involute impeller, owing to this impeller of pump 21 have employed involute curve blade, as it is shown on figure 3, thus make liquid less in accelerator loss, is conducive to liquid extrude and drain。

In addition; electric machine assembly in the present embodiment includes electric machine support; the bottom of electric machine support is provided with some to leg; described leg can be height adjustable leg; the containment vessel being provided above motor at described electric machine support; motor is arranged in containment vessel, and described output shaft 11 passes described containment vessel and is connected with pump assembly。

In the present embodiment, also according to actual user demand the feature in embodiment 1 can be replaced or increase, for instance:

1, floss hole can be prepared bottom pump head 24 and install drain valve additional；

2, to the occasion having sterility requirements, mechanical seal place can install steam isolating device；

3, in electric machine assembly, motor can adopt frequency conversion motor or adopt fire-proof motor etc.。

Obviously, above-described embodiment is only for clearly demonstrating example, and is not the restriction to embodiment。For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description。Here without also cannot all of embodiment be given exhaustive。And the apparent change thus extended out or variation are still among the protection domain of the invention。

Claims

1. a high-cleanness centrifugal pump, including:

Electric machine assembly and pump assembly, the output shaft (11) of the motor in described electric machine assembly is fixing with the pump shaft (25) in described pump assembly to be connected, described pump shaft (25) is fixing with described impeller (21) and is tightly connected, thus driving described impeller (21) to rotate form centrifugal force；

Described pump assembly also includes:

Pump housing support (22), its rear end and described electric machine assembly are relatively fixed setting；

Pump, every dish (23), is arranged on the front end of described pump housing support (22)；

Pump head (24), the relatively described pump of described pump head (24) is fixedly installed every dish (23), and and described pump formed between dish (23) and be used for holding the space of described impeller (21)；

It is characterized in that: described impeller (21), described pump head (24) and described pump are forging molding every dish (23)。

2. high-cleanness centrifugal pump according to claim 1, it is characterised in that:

The upper molding of described pump head (24) is for the runner of pumping liquid, and described runner is circular arc。

3. high-cleanness centrifugal pump according to claim 2, it is characterised in that:

Described runner is volute shape runner。

4. high-cleanness centrifugal pump according to claim 3, it is characterised in that:

Taper suction casing that the flange being arranged on described pump head (24) rear end that described pump head (24) includes being connected every dish (23) with described pump, the opening for sucking liquid narrow gradually and the diffusion deferent segment that the opening for output liquid amplifies gradually。

5. the high-cleanness centrifugal pump according to any one of claim 1-4, it is characterised in that:

Also include mechanical seal (3), described pump is provided with the screwed hole of the stationary ring connected in described mechanical seal (3), the rotating ring in described mechanical seal (3) and described pump shaft (25) linkage on dish (23)。

6. high-cleanness centrifugal pump according to claim 5, it is characterised in that:

Described pump is trans screwed hole every the upper screwed hole arranged of dish (23), and the screw thread on described stationary ring is trans screw thread。

7. high-cleanness centrifugal pump according to claim 5, it is characterised in that:

Also including end elongation moulding and have the shaft end nut (33) of cover plate, described shaft end nut (33) is threadeded with described pump shaft (25), and described cover plate compresses described impeller (21)。

8. high-cleanness centrifugal pump according to claim 7, it is characterised in that:

The end face that described impeller (21) is corresponding with described cover plate forms cannelure, in described cannelure, is provided with O-ring seal。

9. high-cleanness centrifugal pump according to claim 8, it is characterised in that:

Angle between described taper suction casing and described diffusion deferent segment is 90 ° or 45 °。

10. the high-cleanness centrifugal pump according to any one of claim 1-9, it is characterised in that:

Between described output shaft (11) and described pump shaft (25), two collars by being oppositely arranged are connected, described collar has the endoporus gradually tapered up, by several bolt assemblies, two collars are connected, in connected state, two collars are resisted against on the obliquity prominence platform of the upper molding of described pump shaft (25)。