DE1923821U - Eccentric screw pump. - Google Patents

Description

I / fAM Sssskzsp,

HFL-ING. FRANZ WERDERMANN pump. 6. 7.

PATENT ADVERTISER HAMBURG 13 '"· *"

INNOCENTIASTRASSE 30 TELEFON «2139

S.65066 Wdm / tw

Eugen S o e d 1 η g Hamburg.

Eccentric screw pump.

The utility model relates to an eccentric screw pump.

An eccentric screw pump generally includes a rotor that is helically wound and circular Has cross-sections, and a stator, in which a also winding cavity is incorporated. The pitch of the stator is twice as large as that of the rotor «The rotor is usually made of a rigid material, e.g. from ftahl. The main stator material used is a elastic material, e.g. a plastic (elastomer) used, by superimposing the different pitches of The rotor and stator result in closed cavities which, when the rotor rotates in the axial direction, continue * stride. The resulting suction and displacement effect causes a continuous flow of the Medium. In addition to its rotary motion, the rotor also performs a radial back and forth motion.

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An eccentric screw pump is particularly good for promoting ff also hard fllessfähiger, inhomogeneous Π fluids, even if these foreign bodies of comparable h most varied kind included. They are therefore also f? used to promote such as liquid manure with straw and other \\ fabric remnants from slaughterhouse waste, in which may Tex \ i tilien may be included, as well as wastewater with ff. · string-like foreign substances verschlafenster Art. || The long-fiber or strand-like foreign matter in such conveying media can, under certain circumstances, become entangled and in. or cause blockages behind the pump.

»S In order to avoid this and to

make an eccentric screw pump according to the Utility model with a cutting unit in an anteroom the suction side, which is connected to the rotor of the pump.

I. connected to business 1st.

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The son's envy consists of a fixed one with the part connected to the pump housing and an elastically adjacent part rotating with the rotor. || The fixed part of the cutting unit can change the shape I of a bar spanning the clear cross-section to have. The circumferential part of the cutting unit «* - *, can go through A symmetrical two-winged Nesserbalken rub an opening in the middle to slide it onto one Eur housing axis parallel pin on rotor g; HIiJet be.

In the following, the utility model is argand the For example, the drawing is explained in more detail:

The reward is an embodiment example of an eccentric screw pump according to the utility model M:
;: Flg. 1 and 2 show two sectional views.

Flg. 1 Is the pump housing in which the stator;.; :: (2) is fastened, through which the rotor (3) passes.

Ul The rotor is via a universal joint (4), which is in

| v this case in an anteroom (5) on the pressure side of the

f | Pump is located, with a prime mover (not shown)

if represents) connected. In an anteroom (6) on the suction side

jf of the stator is the cutting unit, which consists of a

I with the Qehfluse firmly connected cutter bar (7) and {§ ■ an elastic, circumferential knife

bar (8) consists. The fixed cutter bar (7) is attached to the protrusions (9) by screws. the circumferential cutter bar (8), the symmetrical two-winged

with a hole formed in the middle 1st, 1st using of tongue and groove (lo) pushed onto an axial pin (11) on the rotor (3) and is supported by a package of Disc springs (12) pressed against the fixed cutter bar (7) · As in particular Flg. 2 shows where one rotation of the cutter bar (8) is assumed to be counter-clockwise, the rear edges of the fixed and, of the circumferential part (7 or 8) with a serrated or be provided wave-shaped grinding (13).

I As a result of the radially oscillating movement that the Rotor as it rotates, and which is on

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transfers the pin (11) and the rotating knife (8), there is a constant change of those who work together Parts of the cutting edges of the cutting unit. As also from Flg. 2 1st allows training the cutting unit is maintained relatively racy large passage areas for the pumped medium. Long fiber or strand-like foreign bodies in the conveying medium therefore easily penetrate between the Parts of the cutting unit and are continuously reduced by them. This makes the pumping process easier and the risk of constipation avoided or reduced. The novel design of the eccentric screw pump is simple and does not require any significant additional space feasible and almost as robust and reliable as the other parts of an eccentric screw pump

Claims (7)

S.65o66 Wdm / tw Schuta requirements 1 · Eccentric screw pump ^ - marked by a Drive connected to the rotor in an anteroom cutting unit arranged on the suction side. 2. Eccentric screw pump according to claim 1, characterized in that the cutting unit consists of a fixed · » the part connected to the pump housing and an elastic part on the other hand, there is part connected to the rotor. 3 · Eccentric screw pump according to one of claims 1 or 2, characterized in that the fixed Part of the cutting mechanism has the shape of a clear cross-section the transversely spanning beam of the pump housing 4 «Eccentric screw pump according to one of the claims 1 to 3 »characterized in that the peripheral part of the cutting unit by a symmetrical two-winged knife bar with an opening in the middle is formed to slide onto a pin on the rotor that is parallel to the housing axis. 5. Eccentric screw pump according to one of claims 1 to 4, characterized in that the rotating part of the cutting unit by a package of together with him 9/15/65 disc springs pushed onto the pin on the rotor, which are supported on the one hand against him and on the other hand against the rotor, against the fixed part of the Tendon is pressed. 6. Eccentric screw pump according to one of claims 1 to 5 »characterized in that the rotating Part of the cutting unit by tongue and groove In the axial direction on the pin on the rotor - movable but opposite this is arranged non-rotatably. 7. Eccentric screw pump according to one of claims 1 to 6, characterized in that the interacting Cutting edges of the fixed and the circumferential part of the cutting unit with a serrated cut are provided. r ~ - · * .- · ■■ j 1—