DE102016013581A1 - Rotary displacement pump RVP - Google Patents

Abstract

This machine is a rotary positive displacement pump RVP, for the conveyance of liquids such as a compressor of gases, in which there is a uniform flow rate at which there should be no volume peaks and thus pressure peaks, which, as is known, not really achieved until today becomes. Both for higher pressures as well as for precise quantitative delivery of liquid media, this pump design can be considered, with a special design, a largely laminar volume flow can be achieved. This is also an application in the field of jet propulsion technology conceivable.

Description

State of the art

Rotary piston and piston pumps generate due to the design-related timing (gears, piston stroke, etc.) in terms of volume and pressure moderately varying volume flow. But there are various technology areas, especially z. As in today's fine motor system control, the requirement with constant volumes such as pressure ratios on the part of the conveying machine to grant a constant volume flow.

In addition, the pumping medium is largely swirled in today's pumps or squeezed or cut, which can be determined alone on the significant heating of the pump - and what must of course be balanced with a higher energy consumption. Depending on the design, this rotary displacement pump RVP can have a wide delivery cross section and therefore only on the axial roller-like rotors ( 1 like 2) so at the pitch point ( 4 ) a forced squeezing takes place, in relation to the total cross-section, however, very small, but otherwise the medium is almost laminar in segment areas ( 9 ), Parts of the rotors ( 1 as 2) is performed by, an advantage is expected here as well.

function Description

This is a rotary displacement pump RVP, with two counter-rotating, if necessary via a pair of gears synchronously guided, special rotors ( 1 as 2) in a housing ( 3 ), the paraxial running interlocking a suction or inlet area ( e ) such as pressure range or outlet ( A ) hold. These run precisely together with each 50% of the one rotor having an outer diameter D increased as the other rotor 50%, inner diameter d to the depth of engagement ( 5 ) diminished as mirror-like with the opposite rotor and of course in the unwinding by 90 ° or equally divided multiply in as turn to each other (see, for example 1 . 2 to 5 ). The multiply raised part D as well as the equally repeatedly lowered part d are thereby by about 90 ° or in addition to going multiple division by a necessary Verschränkunsgradzahl ( 11 ) around the axis, which is thus able to generate a uniform volume flow, since the segment areas ( 9 ) of the rotors always the predefined volume amount for a uniform flow complement each other from rotor ( 1 ) With ( 2 ).

At the respective pitch point ( 4 ), at the top at D as below at d - in each case according to the view - rotate the two rotors ( 1 like 2). As a result, the two functional areas at the pitch point ( 4 ) once in the intake ( e ) as in the printing area ( A ) predetermined, see claim 1 , In the opposite rotation moves axially an S-shaped fillet ( 7 ) on both flanks ( 5 ) between the rotor surface (D) and (d) of each rotor, which fit exactly into one another at the pitch point ( 4 ) roll between both rotors and thus here at the flanks ( 5 respectively. 7 ) completely seal.

The entry as well as the exit of the medium into and out of the housing ( 3 ) must be dimensioned so that the increase in volume in the pump by means of the rotational speed to be regulated can not lead to excessive speeds or even cavitation, but this is a fundamental problem affecting all pumps, which is the positive property of laminar transmission assumed by this machine would run counter if exceeded. The pumping section in the pump is in any case large for a quiet pumping due to their construction and thus, taking into account the previous sentence, the work in the pump will be almost noiseless. That may be of interest for some technical requirements.

In this case, with a special V-shaped arrangement of the sub-cells (see Bl. 3; 6 ; 10) in axial view, so once over 50% z. B. to the left as 50% to the right crossed, for a repeal of axial compressive forces on the flanks ( 5 ) take care of the rotors.

Even with a multiple division (Bl. 3; 5 ) than that shown in the drawings (Bl. 1; 1 ) listed 90 ° division, there will be a desired increase in the possible pressure to be generated over gear pumps.

The pump is self-priming, which is important for many applications.

use

• - Hydraulikpumpe
• - Kompressor für alle Formen von Gasen
• - als langsam oder mittelschnell laufende Förderpumpe für chemische Stoffe wie für breiige bis flüssige Lebensmittel
• - Und hier auch für die Bestimmung von begrenzten Fördermengen als Mengendosierer auf Grund des klar definierten Fördervolumens bei einer Umdrehung bzw. einer mehrfachen dieser
• - Wasserförderung als auch für spezielle Jet-Technik z. B. beim Schiffsantrieb bzw. der Steuerungstechnik, s. Querstrahlruder oder ähnlich, im Schiffsbau.

This rotary displacement pump RVP can be used for almost all areas of conveyor technology. The most important fields of application are listed here:

• - Hydraulic pump
• - Compressor for all forms of gases
• - As a slow or medium-speed feed pump for chemicals such as pulpy to liquid foods
• - And here also for the determination of limited flow rates as quantity dispensers due to the clearly defined delivery volume in one revolution or a multiple of these
• - Water extraction as well as for special jet technology z. B. in marine propulsion or control technology, s. Transverse thruster or similar, in shipbuilding.

Since this pump is also self-priming, it is in many areas of daily life such as in the industry and z. B. in the sewage sector or in ship technology particularly suitable.

LIST OF REFERENCE NUMBERS

1

Rotor, for example anticlockwise to drawing

2

Rotor, example clockwise to drawing

3

casing

4

Pitch line, pitch point area

5

Depth of engagement, flank height

6

7

Rounding, S-shaped

8th

ring segment

9

segment area

10

V-shaped faces

11

Degree of interlocking in °

A

Spout, pressure range

e

Inlet, intake area

FD

Surface high

fd

Surface inside

P

perspective

Claims (6)

Displacement machine as a hydraulic pump or compressor of gases consisting of two parallel special roller-like rotors (1 as 2), which in a housing (Bl. 2; 3 ; 3) rotatably mounted in opposite directions and if necessary via a gear (not shown) accurately connected to each other, characterized in that these rotors (1 as 2) both in the area of mutual penetration / pitch point (4) over the entire depth of engagement (5) as the Axial steadily migrating penetration length on the flanks (5) ensure a precisely fitting mutual sealing of the suction region (E) against the Ausdrückbereich / pressure range (A) such that rotor 1 at the intake / beginning (E, Bl. 2, 3 // s. Page 1, 1 ) over 90 ° twice 180 ° opposite the housing with the diameter D over 90 ° full filling as about 90 ° to a mutual Endringtiefe reduced diameter d then having this division D over the entire length of the rotor a uniform approximately 90 ° comprehensive Spiraling undergoes, as above, over the axial length of this pump member (1) so 2 * 25% of the surface of the rotor (1) high, D, as 2 * 25% low, d, identifies and to a mirrored rotor (2) in exactly the same way in the rotor (1) (as rotor (1) in rotor (2)) intervenes this system at the mutual pitch point (4) in a suction (E) as in a pressure range (A) separating a required pulse-free pumping work can arise during rotation, wherein the suction (E) and pressure range (A) must be arranged according to the resulting flow rate, this pump both transverse to the axis (Bl. 2; 3 ) as axially (Fig. 2; 4 / P), see below. Displacer after Claim 1 characterized by more than twice high pitch (D) as twice lower (d) on the rotor (1 as 2), characterized in that the helical now more than double surfaces (FD) measured uniformly with the diameter D radically less width and Thus surface area per segment and thus the friction on the medium between the housing (3) and these surfaces ( 5 ; FD) is reduced once but a desired higher sealing effect compared to a pure gear pump is still achieved. Displacer after Claim 1 to 2 in such a way with S-shaped flanks (5) as a lateral transition between the high surfaces (FD) as inner (Fd) so executed and characterized in that between the two rotors (1 as 2) at the pitch point (4) as the axially steadily continuously migrating lateral contact of the rotor flanks (5 or 7) between (D) as (d) a nearly completely complete seal due to the mutual unwinding on a mutually uniform and uniform mutually complementary S-shaped fillet (7) is ensured and thus an involute replaced. Displacer after Claim 1 to 3 in a V-shaped representation of the surfaces (Bl. 3, 6 ) Axially seen, so an obliquely opposite, execution of Verschränkungen on each rotor of the surfaces (FD) as (Fd) executed on exactly half the axial length of the rotors and thus characterized for the rotors as cross-flow machines such that the twice or more radially divided Areas (FD) like (Fd), s. Claim 1 and 2 , once over 50% in axial length z. B. to the right and then the remaining 50% entangled to the left and thus forming a V (Bl. 3; 6 ; 10) during the pumping work no axial transverse forces on the edges (5) arise, wherein the pitch and thus the entanglement must be adjusted so that the sum of the volume contents between rotor 1 as rotor 2 always give a full volume of the medium to be pumped at the output and thus the pumped medium escapes without volume and pressure changes. Displacer after Claim 1 to 3 , not 4, provided with a 3-fold or multiple division is the supply (E) as export (A) of the medium to be delivered in the two Achsverschlussdeckeln (not shown) arranged and characterized in such a way that the inlet (E) z. B. for a rotor (1) left and left with the direction of rotation and rotor (2) right to right in this just above the axis lying in two circle segments (8) to the left as right above the pitch point (4) starting z. At least over a segment area (9) plus the degree of interlocking (sheet 3; 5 ; 11) of the segment reaching and the outlet (A) running on the rear cover equally executed below the above-considered Wälzpunktes (4) which in such a design, a nearly laminar passage occurs in contrast to the cross-flow guided pumps (Bl. 2; 3 ) conventional design and thus z. B. as under Claim 4 necessary (sheet 2, 4 ; Perspective (P) with access (E) as export area (A)). Displacer after Claim 1 to 5 characterized in that by changing the direction of rotation, this rotary positive displacement pump RVP can be used with the same functional result in both directions as well as can take over the functions of a motor.

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