EP2179182B1 - Rotary cylinder rotary slide positive-displacement pump - Google Patents

Description

State of the art

Since the beginning of industrialization, vane and rotary vane pumps have been used successfully and to the satisfaction of users and manufacturers for the most diverse applications. The increasing shortage of energy and the associated ever-increasing energy prices are forcing the industry today to make ever more stringent checks on the energy balance of all areas of its business. This also includes the pump technology and the pump units used there, which represent a considerable proportion of the energy consumption and the associated costs for many companies.

Technical suggestions for improvements in rotating systems are traceable worldwide over many years. As examples of this can be mentioned, inter alia DE 172,803 (1904/08 ) GB 215282A (1924 ) US 1,712,938 (1927/29 ) US 3,226,014A (1965 ). JP 57186086A (1982 ) DE 3605922 (1986 ) DE 10103580 (2002 ) Next US 1,712,935 (1926 ) US 4,553,916 (1985 ) DE 3738484 C2 (1987/90 ). However, the variety of parts and technically difficult-to-implement solutions have not been able to bring any success to many such techniques. Of the above applications and patents, the technical features of DE 172603 . US 4,553,916 . US 1,712,935 / 6 such as DE10103580 and the DE10102852 the item registered here so far the closest.

Aim and description of the invention

The aim of the new development was primarily to further improve the energy and volumetric efficiency of those rotating pump systems, as described in the German patents DE 101 03 580 B4 and DE 101 02 852 C2 have been described.

It is proposed, in addition to the two rotary cylinders (= two pump chamber walls) to rotate a third pump chamber wall also functionally to allow a further reduction of friction work and a gentler promotion.

In addition, if the pump is driven by the outer rotary cylinder, then the cheaper translations achieved in this way have further advantages in addition to the structural advantage that z. B. a passage of the drive shaft through the pump chamber can be avoided.

The design of an improved pump technology should also be suitable for industrial use as a process pump beyond.

The technical solution of the new goal of the invention is achieved by the features formulated in the patent claims

One embodiment of the rotary cylinder displacement pump according to the invention Two rotary cylinders (01 + 02) are mounted in a pump housing (03). The hollow outer rotary cylinder (01) with a slightly smaller diameter than the cylindrical pump housing (03) finds its bearing on a first level in the inside rounding (04) this pump housing (03). The inner rotary cylinder (02a + b) is mounted with its round flange (05) on a second level in a cylinder pot (07) which is fitted in the rear wall (06) of the pump housing (03) so that this second inner rotary cylinder (02a + b) A rotary valve (09a + b) is fixed but movable on a rotary joint (10) on the inner side (15) of the outer rotary cylinder (01 ) hinged and at the same time in the inner rotary cylinder (02a + b), this while centering, slidably mounted. This bearing (11) centrally through the inner rotary cylinder (02a + b) divides this rotary cylinder (02a + b) in two symmetrical parts (02a + 02b), with a view similar to that of two reflecting crescents.

The advantageous properties sought with the further optimization of this pump technology required some relevant changes. Thus, the rotary valve displacer (09a + b) attached to the rotary joint (10) of the outer rotary cylinder (01) has been divided into two such that one part (09a) is movably but firmly connected to this rotary joint (10) as before. Also pass through the two parts of the rotary valve (09a + 09b) in the middle of the inner rotary cylinder (02a + b). If such a pump is driven via the outer rotary cylinder (01), then this rotary cylinder (01) takes the rotary valve (09a + b) and at the same time the inner rotary cylinder (02a + b) forcibly guided along.

The two rotary slide parts (09a + 09b) can by the articulation (10) to the outer rotary cylinder (01) and by their slidable support by the inner rotary cylinder (02a + b) on the one hand during one revolution constantly changing Winkelsteltungen to the outer rotary cylinder ( 01) smoothly balance and at the same time ensure the necessary continuously changing diameter lengths of the rotary valve (09a + b) in each rotational position. For the turn to the hinged rotary slide part (09a) slidably mounted other rotary slide part (09b) now always extends through the open to both sides rotary valve bearing (11) of the inner rotary cylinder (02a + b) through to the opposite inner chamber wall (15) of the outer Rotary cylinder (01).

This displaceably mounted second rotary slide part (09b) must receive a forced guidance if its sealing function on the inner cylinder wall (15) of the outer rotary cylinder (01) is to be ensured in each rotational position.

For a technical solution was found that can contribute two benefits to improve the efficiency of the pump.

Thus, a cylinder side wall (16) mounted coaxially in an edge groove (13) of the outer rotary cylinder (01) closes the working chamber (12) lying between the two rotary cylinders (01 + 02a + b) towards this side. This rotatable cylinder side wall (16) has on the inner side towards the working chamber (12) has a guide pin (17). This guide pin (17) engages in a bore (18) in the displaceable part (09b) of the rotary valve (09a + b) and is thus carried along by this rotary slide part (09b). The drehverschiebtiche cylinder side wall (16) in turn holds the sliding rotary slide part (09b) in this way in each rotational position at a defined distance from the inner cylinder wall (15) (= working chamber wall) of the outer rotary cylinder (01).

Also rotates on the outer rotary cylinder (01) mounted cylinder side wall (16) guided by the sliding rotary slide part (09b), so with the rotary cylinder (01) rotatably with. The friction of the displaceable rotary slide part (09b) on the cylinder wall (16) is largely reduced to a limited partial area of this co-rotating cylinder wall (16), as the rotary slide part (09b) through the inner rotary cylinder (02a + b) during one revolution of the outer rotary cylinder (01) before - and then again after.

These aspects of friction work considered here considered a situation in which sealing material is used for sealing. If the seal is controlled by slot widths, other necessities arise accordingly.

The pump is driven by the outer rotary cylinder (01). This results in more favorable gear ratios compared to a drive on the inner rotary cylinder (02a + b). However, as described in the earlier patents, this technique also allows for drive via the inner rotary cylinder.

Due to the design of the rotary valve displacer (09a + b), in the angular position according to Sheet 4 / Fig. 7 Input and output closed simultaneously. In this position, the largest possible intake volume per half-turn is reached This intake volume is thus promoted twice in one complete revolution. The delivery volume of one complete revolution thus significantly overcomes the total volume of the working chamber.

Achievable benefits

• Die hier beschriebene Technik macht es möglich, von den vier Arbeitskammerseitenwänden jeweils drei (14, 15, 16) zusammen mit dem Pumpfluid durch diese Arbeitskammer zu befördern. Anders formuliert: Die Arbeitskammer selbst rotiert mit dem Pumpfluid. Die dabei an den mitrotierenden Seitenwänden noch zu leistende Reibarbeit des Drehschieberverdrängers der Pumpe wird auf ein Minimum reduziert.

From the above description, the achievable with the improved design of Drehzylinderdrehschleberverdrängerpumpe advantages are traceable:

• The technique described here makes it possible to convey three (14, 15, 16) of the four working chamber sidewalls together with the pumping fluid through this working chamber. In other words: the working chamber itself rotates with the pumping fluid. The friction work of the rotary valve displacer of the pump still to be performed on the co-rotating side walls is reduced to a minimum.

These three of four walls of the pump chamber (12), that is in each case a part of the outer-βeren lateral surface (14) of the inner rotary cylinder (02a + b), the inner circumferential surface (15) of the outer rotary cylinder (01) and the drehverschieblichen rotary cylinder side cover ( 16) of the rotary cylinder (01), enclose permanently functionally tight, that is during one entire revolution of the pump, the pumping fluid and the working chamber (12). During pumping, the pumping fluid is surrounded by three solid sidewalls and quasi "carried" gently through the chamber, not squeezed through, as in some other pumping techniques.

The reduced friction surfaces mean that fluids containing abrasive substances are less subject to friction and thus less frequent process interruptions due to the necessity of having to renew abraded consumed functional parts.

The rotary valve displacer (09a + b) must efficiency reducing friction losses only on the rear wall (06) of the pump housing (03) and a portion of drehverschieblichen cylinder side wall (16) (= working chamber wall) of the outer rotary cylinder (01) and the partially swept inner surface of the outer rotary cylinder (01 in purchase.

Since the technical solutions of the pump described here also make it possible to dispense with a drive shaft through the pump housing or through the pump chamber, there are more conceptual design options and greater freedom in the formation of individual functional parts.

Thus, the design of this pump allows the non-contact rotation of the functional parts in contact with the pump fluid and also the non-contact adjustment of the rotating parts to the flat (06 + 16) and cylindrical (14 + 15) side walls of the working chamber (12). The pump is self-priming and dry-running.

The easy access from all sides in / to the inside and outside of the pump allow for additional technical features, such as heat supply and removal, uncoupling the pump from the production cycle in ongoing production, replacement of spare parts of the pump without interrupting production.

The pump can be built robust. As a result, higher pressures can be achieved. Also, higher speeds should be possible.

The housing can be hermetically sealed off. A magnetic coupling can also be set up well in conjunction with the outer rotary cylinder (01). If some pump fluids are sensitive to a near magnetic field, a magnetic coupling at a necessary distance to the pump chamber (12) could be technically solved within reasonable limits.

image Description

page 1

- shows two views ( Fig. 1 and 3 ) and a sectional drawing ( Fig. 2 ) of the empty pump housing.
The sectional drawing according to Fig. 2 corresponds in each case to the sectional lines SL of FIGS. 1 and 3 , It clarifies Fig. 1 the view of a viewer in the empty pump housing, as in the sectional drawing Fig. 2 shown, seen from the edge right into the housing.
The view from the picture left on the sectional drawing gem. Fig. 2 corresponds to the rearward exterior view of the housing as shown in FIG Fig. 3 ,

page 2

- In Fig. 4 the movements of the functional parts of the pump in the rotation are traceable.
The displaceable cylinder ceiling (16) guided in the peripheral groove (13) of the outer rotary cylinder (01) is missing in order to clear the view into the interior.

Sheet 3

- FIGS. 5 and 6 as well as their cuts Fig. 5a and 6a are exemplary embodiments of the co-rotating working chamber side wall, the cylinder ceiling (18) and (16a).

Sheet 4

- Fig. 7 illustrates the all-round smooth working chamber walls for a gentle pumping of the pumping fluid.
In this position, the input and output are closed. The largest possible pump volume has been reached.
Continuing to rotate opens the outlet and the pumping process starts again.
The drive shaft does not have to be guided through the working chamber. The drive is made via the cylinder ceiling 16a by means of mechanical or magnetic coupling.

LIST OF REFERENCE NUMBERS

01 -

Outer rotary cylinder

02 -

Inner rotary cylinder

03 -

pump housing

04 -

Bearing of the outer rotary cylinder 01

05 -

Round flange of the inner rotary cylinder 02

08 -

Rear wall of the pump housing

07 -

Cylinder pot (bearing of the rotary cylinder 02)

08 -

sealing line

09 -

Drehschleberverdränger
09a - Rotated swivel part hinged
09b - Rotary slide part displaceable

10 -

Drehgelank / hinge pins

11 -

Bearing in the rotary cylinder 02 for rotary valve 09

12 -

working chamber

13 -

Randnut In outer turning cylinder 01

14 -

Outer lateral surface of the inner rotary cylinder 02

15 -

Inner Manteifläche the outer rotary cylinder 01

16 -

Movable cylinder cover 18a - cylinder cover fixed on rotary cylinder 01st

17 -

Guide pin on cylinder ceiling 16

18 -

Bore In rotary valve part 09b

19 -

Rohrteitungsflansch

20 -

coupling part

21 -

input channel

22 -

output channel

SL -

intersection

→ -

Direction of movement of the pump parts

- Filessrichtung of the pumping fluid

Claims (7)

1. Rotary cylinder rotary slide positive displacement pump comprising a housing (03) and a hollow outer rotary cylinder (01) supported on a first plane with a first diameter and an inner rotary cylinder (02a+b) supported on a parallel axis on a second plane in and to this outer rotary cylinder (01) with a second, smaller diameter, with a working chamber (12) between the outer (01) and the inner (02a+b) rotary cylinder, with inlet (21) and outlet ducts (22) into this working chamber (12), that inner rotary cylinder (02a+b) forms a sealing line (08) with the inner cylinder wall (15) of the outer rotary cylinder (01) between the inlet (21) and the outlet duct (22) and that inner rotary cylinder (02a+b) shows a centrally diagonally continuous support (11) open on two sides for a dual rotary slide positive displacement device (09a+b) whereby the first rotary slide positive displacement part (09a) is fastened on the inside to the outer rotary cylinder (01) by means of a hinge (10) and is guided in the support (11) swinging around this hinge (10), and the second rotary slide positive displacement part (09b) is held in each rotating position at a defined distance to the inner cylinder wall (15) of the outer rotary cylinder (01); characterised by a cylinder side wall (16) arranged coaxially and rotationally displaceable to the outer rotary cylinder (01), which cylinder side wall (16) on its inner side (16) radially to the inner rotary cylinder (02a+b) force-guides the second rotary slide positive displacement part (09b), while it itself is turned by this rotary slide positive displacement part (09b).
2. Rotary cylinder rotary slide positive displacement pump with features of Claim 1, characterised by a dual rotary slide positive displacement device (09a+b) comprising a first rotary slide part (09a) and a second rotary slide part (09b) arranged so as to be longitudinally displaceable in its turn with respect to this first rotary slide part (09a).
3. Rotary cylinder rotary slide positive displacement pump with features of Claims 1 - 2, characterised by a double cylinder side wall (16+16a) arranged coaxially to the outer rotary cylinder (01) in the function of a double side wall of the working chamber (12), the inner side wall/side disc (16) of which is designed so as to co-rotate with rotational displacement with respect to the outer rotary cylinder (01).
4. Rotary cylinder rotary slide positive displacement pump with features of Claims 1 - 3, characterised by a co-rotating rotationally displaceable inner side wall/side disc (16) of the working chamber (12), preferably supported and guided in a marginal groove (13) of the outer rotating cylinder (01) or guided coaxially to the outer rotating cylinder (01) by some other means.
5. Rotary cylinder rotary slide positive displacement pump with features of Claims 1-4, characterised by a double cylinder side wall (16+16a) arranged coaxially to the outer rotary cylinder (01) in the function of a double side wall of the working chamber (12), the outer side wall (16a) of which is fixed to the outer rotary cylinder (01), like a rotating cylinder liner.
6. Rotary cylinder rotary slide positive displacement pump with features of Claims 1-5, characterised by a rotationally displaceable inner side wall/side disc (16) of the working chamber (12), which grips with a guiding pin (17) into a bore (18) of the longitudinally displaceable rotary slide part (09b).
7. Rotary cylinder rotary slide positive displacement pump with features of Claims 1-6, characterised by a longitudinally displaceable rotary slide part (09b), which force-guides the rotationally displaceable side wall/side disc (16) with a guide device.

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