DD160237A3 - EQUIPMENT OF THIRD-PARTICULAR CIRCULAR PUMPS - Google Patents

Abstract

The invention relates to a conveying, cutting and homogenizing device and to a device for introducing vibrations into fluids to be conveyed before they enter the delivery device. The aim is to reliably promote the delivery of, in particular, thick products with a particularly high dry matter content and with high gas or air fractions. Task d. The invention is to provide a turbulence by a particularly idiosyncratic trained impeller and variable in the centrifugal pump, different devices in his application universal centrifugal pump unit. According to the invention, d. Problem solved by the fact that in a semi-open impeller with increasing Laufradaustritt the blades undergo a largest axial Einschnuerung at a diameter occupied by about 2/3 of the impeller outer diameter, the impeller is provided with or without cutting device and the impeller with a known Zufoerderschnecke with or without cutter and the Zufoerderschnecke a vibrator is connected upstream.

Description

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Title of the invention:

Facilities on thick matter centrifugal pumps

Field of application of the invention:

The invention relates to a conveying, cutting, homogenizing or mixing device and a device for the introduction of vibrations or vibration into liquids to be conveyed and thick matter prior to entry into the conveying member for loosening gelatinous or deposited pulpy floating layers, which in one Dickstoffkreiselpumpe for promotion or for the hydro me ¬ chanic transport of liquids and thick materials with high dry matter content and high gas »or air fractions, especially flowable concentrate feed mixtures, liquid manure, paper and pulp or the like, are arranged at low geodetic inlet heights. ·

Characteristic of the known technical solutions: For the process of promotion or for the hydromechanical transport of z. B. flowable concentrated feed mixtures from the feed processing plants to the livestock farming of large-scale plants of animal production is known that due to the different specific physical properties of the feed mixtures, the peculiarities of the technological treatment process of feed mixtures and the resulting high gas or air fractions as well as due to the special plant-side conditions such. B ₀ low geodetic inlet height, displacement pumps, in particular single-screw pumps as a conveying member, z, T · be used with upstream feed screw (DE-OS 15 53 201). Due to the entering into the feed mixtures when using root crops in the feed treatment process abrasive admixtures, despite applied foreign body separator occurs high wear on the conveying organs, primarily in the

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Stators of single-spindle pumps, a · This leads after a relatively short time to the failure of the pump.

Other issues arise due to the problems caused by the physical properties of the aforementioned funding problems in the Punktionstüchtigkeit in the case of displacement pumps required to be arranged pressure relief organs.

The pumps shown require a technical and cost-related high effort, which is not justified by the results obtained.

For the promotion or for the hydromechanical transport, e.g. of manure with high dry matter content and long-fiber shearable components, it is known to provide centrifugal pumps with special agitator, upstream and downstream crushing and subsequent downstream or separate Spülleitungssystem (DD-PS 71 455, DD-PS 79 227).

The known various constructive embodiments, which are adapted to the special delivery fluids and thick materials and operating conditions, also require a high cost in technical and economic terms. For economic reasons, the trend for application and thus for promotion or after hydromechanical transport of liquids and solids with extremely high dry matter content, up to partially at the yield point, can be seen internationally.

Object of the invention:

The object of the invention is, with a device on a slender centrifugal pump, the promotion or hydromechanical transport of liquids and slurries with a particularly high dry matter content, with and without schri components and with high gas or air fractions at minimum geodetic inlet height continuously and discontinuous, vibration-free and with high smoothness to allow.

Explanation of the essence of the invention:

The object of the invention is to provide by a fluidically particularly unconventionally trained impeller of different design as well as by the centrifugal pump variierbarer, different additional facilities in his application universal centrifugal pump unit, which the

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Disadvantages known? Technical solutions do not adhere and which is suitable to prepare granules with particularly high iCrockensubstanzgehalt and long-fiber shearable components and promote reliable.

According to the invention the object is achieved in that at an open to the suction side and the rear cover wall side closed or partially open impeller with a impeller outlet opposite the impeller inlet suction-increasing impeller width of the impeller blades relative to the rear top wall side in axial direction the largest axial constriction at a diameter experienced, which is about 2/3 of the impeller outer diameter, wherein the impeller is provided on the free passage of the inlet cross-section with or without cutting means and the impeller a known feed screw with or without cutting device and the feed screw is preceded by a vibrator.

Another characteristic of the invention is that the impeller blades are provided on the suction side with a sawtooth-like Nachschneideinrichtung.

In a further embodiment of the invention, the cutting device in front of the impeller of a rotating, attached to two impeller blades and fixed to the inlet housing cutting knife ·

Furthermore, the invention is characterized in that the cutting device of the feed screw is formed from a rotating arranged on the feed screw and fixed to the inlet housing cutting blade. The invention is further distinguished by the fact that in its entire length beyond the attachment housing out into the liquid to be delivered protruding vibrator is designed as an Eotor with opposite or in the flow direction acting employed blades.

Finally, it is another feature of the invention that the devices are variably arrangeable.

Embodiment:

The invention will be explained in more detail below with reference to exemplary embodiments. In the accompanying drawings show

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Pig. 1; Section through the pump housing with impeller and inlet housing.

Pig. 2x cut through the pump housing with impeller and inlet housing and upstream Zuförderscbnecke.

Pig. 3ί Section through pump housing with impeller and inlet housing upstream feed screw and vibrator ·

Pig. 1 shows an impeller 1 which is open to the suction side and closed or partially open towards the rear cover wall side, with an impeller width which increases the impeller outlet on the suction side. The impeller blades 2 experience, based on the rear cover plate in the axial direction, the largest axial constriction at a diameter 3, which is about 2/3 of the impeller outer diameter. Right in front of the center line, an embodiment variant is shown with arranged above the inlet section 4 cutting device 5, which consists of a rotating attached to two impeller blades 2 cutting blade 11 and a fixed to the inlet housing 10 cutting blade 12.

To the left of the centerline is shown a variant without cutter 5 but with the impeller blade in. 2 are provided on the suction side with a sawtooth Kachschneideinrichtung 9. The invention does not exclude that when in Pig. 1 right variant of the center line, the impeller blades 2 can also be provided with a regrooving device 9.

In the embodiment illustrated in Pig * 2, impeller 1 is preceded by a feed screw 6 known per se,. The spiral-shaped Zufördersebnecke 6 has one or more to the suction mouth of the impeller 1 rising and promoting cutting blade. Right from the center line, the feed screw 6 is equipped with a cutting device 7. The suction-side boundary of Zuforsohnecke 6 is provided with a pump shaft perpendicular to the pump shaft or at an angle of 15 ° to the pump shaft center with the attachment housing 15 fixedly connected cutting blade 14. The radial boundary of the Zufördersohnecke 6 is determined by the bore diameter of the attachment housing 15, wherein the rotating cutting blade is formed by the pointed or beveled blade edges of the inlet side of the feed-6 or Aaa Rrihwo-ίΛτηοβοοτ »λϊ -ι« -4- -

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the Zufördersebneeke 6 arranged on «and unscrewable knife made of hard, wear-resistant material, e.g. Spring steel, is executed.

The invention includes that in the two embodiments shown in FIG. 2, the impeller blades 2 are provided with a cutting device 9. In Fig. 3 it can be seen that in comparison to the embodiment form of FIG. 2 Zufördersebnecke 6 is still a vibrator 8 upstream. The vibrator 8, which protrudes for the introduction of vibrations or vibrations in its entire length on the attachment housing 15 in the liquids to be conveyed and thick matter, is designed as Eotor, which is provided with counteracting or in the flow direction acting blades 16. Also in the two embodiments shown in Fig. 3, the invention includes that the impeller blades 2 are equipped with Kachschneideinrichtungen 9.

Claims (4)

-fc-230928 8 Invention claim: 1. Facilities on Dickstoffkreiselpumpen, z _# B. conveyor-cutting, homogenization or «Uischeinrichtung and means for introducing vibrations or vibration in liquids to be conveyed and thick matter before entering the conveying member for loosening of gelatinous or remote pulpy Floating layers, which are arranged in a thick matter centrifugal pump for the promotion or for the hydromechanical transport of liquids and thick materials with high dry matter content and high gas or air fractions,., In particular flowable concentrates, slurry, paper and pulp or the like at low geodetic inlet heights characterized in that at an open to the suction side and the rear cover wall side closed or partially open impeller (1) to the impeller outlet relative to the impeller inlet suction-increasing impeller width the Laufradschaufein (2) relative to the rear Deckwa ndidseite in axial direction, the largest axial constriction at a diameter (3), which is about 2/3 of the impeller outer diameter, wherein the impeller (1) over the free passage of the inlet cross-section (4-) with or without cutting device (5) is provided and the impeller (1) a known per se feed screw (6) with or without cutting device (7) and the feed screw (6) is preceded by a vibrator (8). 2. Device according to item 1, characterized in that the impeller blades (2) are provided with a sägez anshnartigen Nachschneideinrichtung (9). 3. Device according to item 1 and 2, characterized in that the cutting device (5) consists of a rotating, on two impeller blades (2) and fixed to the inlet housing (10) fixedly arranged cutting blade (11; 12). 4o device according to item 1 to 31, characterized in that the cutting device (7) of the feed screw (6) from a rotating on the feed screw (6) and arranged on the attachment housing (15) fixed cutting blade (13; 14) is formed. 5. Device according to item 1 to 4, characterized in that in its entire length on the attachment housing (15) 230 9 28 8 out in the liquid to be delivered protruding vibrator (8) is designed as an Eotor with opposite or in the flow direction acting blades (16) acting. 6 «Device according to items 1 to 5», characterized in that the devices (5; 6; 7 »8; 9) can be arranged variably. For this 3 pages drawings