WO2010140011A1

WO2010140011A1 - Medium transmission unit with circulation blades for the realisation of even medium transmission

Info

Publication number: WO2010140011A1
Application number: PCT/HU2010/000064
Authority: WO
Inventors: Béla Nádas
Original assignee: Nadas Bela
Priority date: 2009-06-05
Filing date: 2010-06-03
Publication date: 2010-12-09
Also published as: HUP0900340A2; EP2438272A1; HU0900340D0; HU229850B1

Abstract

The invention relates to a medium transmission unit with circulation blades for the realizations of even medium transmission which has a medium transmission space. The characteristic of the solution is that there is an equalizations space established in the internal space of the house which is periodically connected to the medium transmission space through passage openings, where at least some of the sealing pieces of the control body are arranged In the equalizations space in such a way so that they cannot move, furthermore the number of propulsion elements positioned on a transmission body is at least two, the propulsion elements are coincident, the part of space through which the propulsion elements pass has a rotational body ring shape, and the propulsion elements are of a size and shape adapted to the size and shape of the cross-section of the medium transmission space, they have the geometric shape that fills in the cross-section of the medium transmission space.

Description

Medium transmission unit with circulation blades for the realisation of even medium transmission

The subject of the invention relates to a medium transmission unit with circulation blades for the realisation of even medium transmission which has a medium transmission space, as well as a house surrounding the internal space containing the input opening and the output opening connected to the medium transmission space, furthermore, propulsion elements serving to force the flow of the medium between the input opening and the output opening, and a transmission body carrying them, and also a control body allocated to the transmission body via a movement-harmonisation part- unit, where the control body has one or more sealing pieces protruding into the internal space of the house, and the transmission body and the control body are fitted into the house in such a way that they cannot move.

Devices suitable for the transmission of mediums not in the solid state, liquids and gases, as well as for the compression of gases, in other words liquid pumps and air compressors have been known of for a long time. Such constructions also exist in which blades force the medium to be transmitted into a transmission channel and propel it further on from the input opening to the output opening.

Such a solution is presented by, among others, patent specification registration number FR 789.912 as well. Its essence is that in the house of the device there are two circular discs performing harmonised, unidirectional motion and arranged on parallel rotational axles, and from each of which there are two protruding blade-like pistons in the shape of cylindrical ring sections. In the house there is a work space set up in which the actual volume that may be occupied by the transmitted medium is of a continuously varying size due to the movement of the pistons.

According to that stated in the specification the solution is suitable for the transmission of mediums, their compression and it may even be used as an internal combustion engine. However, due to the necessity of its operation while the pistons are moving - which is illustrated on figure 3 of the specification - the two cylindrically shapes volumes and the intermediate work space are connected to each other at a given point in time , in other words a completely free figure of eight shaped space is created. As a result of this a significant disadvantage of the device is that it is not suitable for the continuous realisation of medium transmission at a continuous volume.

A further general disadvantage of the known solutions is that in the interest of continuously smooth, or at least even medium transmission, to reduce losses the fit between the propulsion blades and the house wall bordering the transmission channel must be very precise. In the case of the use of a construction involving moving blades that touch and collaborate with one another the formation of the surfaces of the moving blades that touch one another demands great precision and a costly production procedure in order to realise a loss-free closure. The disadvantage deriving from this is that achieving the good seal needed for appropriate operation causes that increase of the production costs.

A further disadvantage is that the precise seal required between the moving components disappears after a relatively short amount of time due to the wear originating from the continuously sliding and friction, leakage occurs, which may lead to the deterioration of the degree of efficiency of the medium transmission device and to it becoming faulty. The repairing of this causes loss of operation of the medium transmission device and extra costs.

Our aim with the solution according to the invention was to overcome the deficiencies of the known versions and to create a device that, besides having a simple structural construction, reliable operation and a long lifetime, is suitable for transmitting an even amount of medium over time.

The recognition that led to the structure according to the invention was if besides the flow channel established for the medium to be transmitted we also create a supplementary space in the internal space of the house that is linked to the medium transmission space via at least two passages so that with the help of sealing elements performing movement harmonised in a unique way with the movement of the propulsion elements serving to propel the medium - due to the unusual, novel movement algorithms - at least one of the passages is always closed, in other words there is no direct and free medium motion bypassing the medium transmission space through the supplementary space between the openings serving for the input and output of the medium, then the supplementary space serves as a continuously full buffer space which during the opening and closing of the passages is always capable of compensating for the loss of liquid deriving from any possible surface unevenness between the propulsion elements and the house and imperfect seal, and so the transmitted liquid medium flowing out of the output - after a determined filling-up period following the start-up of the medium transmission unit - will be the same amount at every moment in time and so the task may be solved.

According to the set aim the medium transmission unit with circulation blades for the realisation of even medium transmission according to the invention, - which has a medium transmission space, as well as a house surrounding the internal space containing the input opening and the output opening connected to the medium transmission space, furthermore, propulsion elements serving to force the flow of the medium between the input opening and the output opening, and a transmission body carrying them, and also a control body allocated to the transmission body via a movement-harmonisation part-unit, where the control body has one or more closing pieces protruding into the internal space of the house, and the transmission body and the control body are fitted into the house in such a way that they cannot move, - is set up in such a way that there is an equalisation space established in the internal space of the house which is periodically connected to the medium transmission space through passage openings, where at least some of the sealing pieces of the control body are arranged in the equalisation space in such a way so that they cannot move, furthermore the number of propulsion elements positioned on a transmission body is at least two, the propulsion elements are coincident, the part of space through which the propulsion elements pass has a rotational body ring shape, and the propulsion elements are of a size and shape adapted to the size and shape of the cross-section of the medium transmission space, they have the geometric shape that fills in the cross-section of the medium transmission space.

A further feature of the medium transmission unit with circulation blades according to the invention may be that there is a dividing member located between the medium transmission space and the equalisation space, the transmission body is arranged on one side of the dividing member and the control body on the other side of the dividing member.

In the case of another version of the medium transmission unit with circulation blades it has more than one transmission bodies and the transmission bodies are associated to the same control body. Or it has more than one control body and the control bodies are associated with the same transmission body.

From the point of view of the invention it may be favourable if there is a single sealing piece located on the one control body or if the number of sealing pieces arranged on the one control body is at least two.

In the case of another embodiment of the medium transmission unit with circulation blades the number of propulsion elements located on one transmission body and the number of sealing pieces arranged on a control body are the same as each other.

In the case of another different embodiment of the invention the part of the space through which the sealing pieces of the control body pass through has the shape of a rotational body ring or a rotation body ring section.

In the case of a further construction version of the medium transmission unit the distance measured between the axis of rotation of the transmission body and the axis of rotation of the control body is of a value equal at the most to the sum of the number indicating the length of the radius belonging to the external delimiting shell of the space part through which the propulsion elements pass and of the radius belonging to the external delimiting shell of the space part through which the sealing pieces pass.

In the case of another different version of the invention in the case of at least a part of the sealing pieces the value of the central angle of the external delimiting surface belonging to the given sealing piece measured from the axis of rotation of the control body reaches the value of the greatest central angle between the most distant edges of the passage openings located between the medium transmission space of the house and the equalisation space from the axis of rotation of the control body. Furthermore, in a given case in the case of a part of the sealing pieces the value of the central angle belonging to the external edges of two sealing pieces closest to each other measured from the axis of rotation of the control body is at most equal to the value of the greatest central angle between the more distant edges of the other side of the dividing member delimiting the equalisation space located between the medium transmission space of the house and the equalisation space measured from the axis of rotation of the control body. Also in the case of at least a part of the propulsion elements the value of the central angle belonging to the external edges closest to each other of two neighbouring propulsion elements measured from the axis of rotation of the transmission body is at the most equal to the value of the greatest central angle located between the input edge of the part of the external delimiting surface of the medium transmission space close to the input opening and the output edge of the part of the external delimiting surface of the medium transmission space close to the output opening measured from the axis of rotation of the transmission body.

In the case of an advantageous version of the medium transmission unit the external delimiting surface and the internal delimiting surface of the propulsion elements is a cylindrical shell piece, furthermore, the propulsion elements are distributed evenly over the transmission body, furthermore, the external delimiting surface and, in a given case, the internal delimiting surface is a cylindrical shell piece, furthermore the sealing elements are distributed evenly over the control body.

In the case of yet another different embodiment of the invention the movement- harmonisation part-unit is a mechanical drive transfer unit, or the movement- harmonisation part-unit has stepping fittings, e.g. electromagnetic members, arranged on the transmission body and/or on the control body and/or on the house, or the movement- harmonisation part-unit has a guide track as well as a guide track follower linked to the control body and at least periodically touching the surface of the guide track.

The most important advantage of the medium transmission unit according to the invention is that due to the supplementary space linked to the medium transmission space in a unique way so that the link may be closed and the transmission body formed in a novel way, as well as the control body and in spite of its simpler structural elements that may be produced with lower costs it makes continuous and even medium transmission possible both at low and high speed of revolution.

A significant advantage deriving from this is that with the medium transmission unit according to the invention even in the case of small amounts of transmitted liquid very precise feed can be carried out, which is an important aspect in the pharmaceutical industry or chemical processing branches and in healthcare, especially in the field of automated or semi-automated feed operations.

Also to be listed among the advantages is that the surfaces of the structural elements participating in the medium transmission that touch each other may be manufactured with a wider tolerance, as the losses deriving from sealing faults are equalised from the buffer medium contained in the supplementary space.

Another advantage that may be mentioned is that due to the favourable formation of the control body and the arrangement of the sealing pieces the rotating, moving elements do not exert a load on the rotating or moving axles, and, therefore, the wear and tear originating from friction is of a significantly lower degree, in other words the lifetime of the medium transmission unit is longer and the probability of it becoming faulty lower.

Also another advantage is that as a consequence of the novel sealing of the passage openings the microcavitation appearing during the flow of the transmitted medium is reduced, which further improves that operation parameters of the unit and also has a favourable effect on consumption. A further advantage originating from this is that the operation of the medium transmission unit may be realised cost-effectively.

In the following we present the medium transmission unit according to the invention in more detail in connection with construction examples on the basis of drawings, hi the drawings

Figure 1 shows a view picture of a possible version of the medium transmission unit according to the invention in partial cross-section,

Figure 2 shows a view picture of the transmission body of the medium transmission unit according to figure 1,

Figure 3 shows a view picture of a construction form of the control body of the medium transmission unit according to figure 1,

Figure 4 shows a view picture of a construction example of one of the half-houses of the medium transmission unit according to figure 1,

Figure 5 shows a view picture of a construction example of the other of the half- houses of the medium transmission unit according to figure 1,

Figure 6 shows a cross-sectional picture of the medium transmission unit according to figure 1, with the transmission body and the control body in a given position,

Figure 7 shows a cross-sectional picture of the medium transmission unit according to figure 1, with the transmission body and the control body in another position,

Figure 8 shows a cross-sectional picture of another embodiment of the medium transmission unit according to the invention,

Figure 9 shows a cross-sectional picture of yet another different version of the medium transmission unit according to the invention, Figure 10 shows a cross-sectional picture of a further version of the medium transmission unit according to the invention,

Figure 11 shows a cross-sectional picture of a still another version of the medium transmission unit according to the invention,

Figure 12 shows a cross-sectional picture of another construction version of the medium transmission unit according to the invention,

Figure 13 shows a view picture of a version of the movement-harmonising part-unit of the medium transmission unit according to the invention,

Figure 14 shows a view picture of another version of the movement-harmonising part-unit of the medium transmission unit according to the invention.

On figure 1 a version of the medium transmission unit can be seen in which the house 10 consists of two half-pieces. Contained in the internal space 20 of the house 10 is the transmission body 30 supplied with propulsion element 31, propulsion element 32 and axle 35, and the control body 40 with sealing piece 41, sealing piece 42 and axle 45. The axle 35 of the transmission body 30 protrudes out of the internal space 20 of the house 10 out of the one axle opening 12 of the one half of the house 10, while the axle 45 of the control body 40 passes through the house 10 through the other axle opening 13 of the same half of the house 10. The axle 35 and axle 45 protruding out of the house 10 are connected to each other with the help of the movement-harmonisation part-unit 50 and also to the drive unit not depicted here, which may be e.g. an electric motor. The movement-harmonisation part-unit 50, in this embodiment - includes a drive wheel 51 fixed to the axle 35, a driven wheel 53 fixed to the axle 45 and an intermediate member 52 located between the drive wheel 51 and the driven wheel 53. The task of the movement-harmonisation part-unit 50 - which in this case is ribbed belt drive - is to harmonise the movement of the transmission body 30 and the control body 40 in the appropriate way both from the point of view of direction of rotation and speed of rotation. Naturally the movement-harmonisation part-unit 50 does not have to be only mechanically driven. The dividing member 11 may be found in the internal space 20 of the house 10, on the one side of which 1 Id is the medium transmission space 23 of the internal space 20, while on the other side the equalisation space 26 of the internal space 20 is located. The medium to be transmitted gets into the internal space 20 through the input opening 21 established in the house 10, while it leaves the internal space 20 through the output opening 22 - not visible in figure 1.

Figure 2 illustrates a version of the transmission body 30 on the circular disc base of which there are two, here cylindrical ring section shaped propulsion element 31 and propulsion element 32. The propulsion element 31 has a cylindrical shell shaped external delimiting surface piece 31a and also a cylindrical shell shaped internal delimiting surface piece 31b. It is obvious that the external delimiting surface 32a and internal delimiting surface 32b of propulsion element 32 are cylindrical shell pieces. Otherwise propulsion element 31 and propulsion element 32 are coincident with each other, and they are arranged on the transmission body 30 symmetrically to the axis of rotation 34 of the axle 35.

Moving on now to figure 3 it shows a version of the control body 40 - which is able to cooperate with the transmission body 30 appearing on figure 2. It can be seen that the control body 40 also has a circular disc shaped base, on which there are two, sealing piece 41 and sealing piece 42. Both sealing piece 41 and sealing piece 42 have a circular cylindrical ring shape. The external delimiting surface 41a of the sealing piece 41 and the internal delimiting surface 42a of the sealing piece 42 also form a cylinder shell piece. Sealing piece 41 and sealing piece 42 are located on the control body 40 symmetrically to the axis of rotation 44 of the control body 40. The control body 40 also has an axle 45, with the help of which it may be rotated.

On figure 4 and figure 5 the first half and the second half of the house 10 consisting of two parts according to figure 1 is illustrated. It can be easily seen that the internal space 20 located in the house 10 consists of several parts. The entire internal space 20 includes the input opening 21, the output opening 22, the medium transmission space 23, the equalisation space 26, as well as the passage opening 24 and the passage opening 25 that realises the link between the medium transmission space 23 and the equalisation space 26. The medium transmission space 23, which here is a circular cylindrical ring piece, runs from the input edge 21a of the input opening 21 to the output edge 22a of the output opening 22, the external delimiting surface part 23a of which is a circular cylindrical ring shell. The dividing member 11 is located between the medium transmission space 23 and the equalisation space 26, the one side Hd of which facing the medium transmission space 23 is circular cylindrical ring shell shaped. The other side 11a of the dividing member 11 facing the equalisation space also has a circular cylindrical ring shell shape. On figure 4 it can also be seen easily that the medium transmission space 23 and the equalisation space 26 of the internal space with the passage opening 24 and the passage opening 25 form a single undivided, freely passable unit within the house 10.

Figure 6 illustrates the characteristic relating to the required dimensions of the transmission body 30 including the propulsion element 31 and propulsion element 32, and of the control body 40 including the sealing piece 41 and sealing piece 42. From the point of view of the operation of the medium transmission unit it may be favourable if the distance "T" measured between the axis of rotation 34 of the transmission body 30 and the axis of rotation 44 of the control body 40 is at the maximum the sum of the radius "r" belonging to the external delimiting shell "h" of the space part the propulsion element 31 passes through and of the radius "R" belonging to the external delimiting shell "H" of the space part the sealing piece 41 passes through. Naturally the minimum value of the distance "T" may even approach one of the values of the radius "r" or radius "R".

Also illustrated on figure 6 is a possible construction solution that satisfies one of the conditions of the desired sealing off of the medium transmission space 23 and the equalisation space 26 from each other. In this construction form between the external edge 41b and external edge 42b falling closer to the sealing piece 41 and sealing piece 42, the value of the central angle "ω" measured from the axis of rotation 44 of the control body 40 may not exceed the value of the greatest central angle "φ" between the more distant edge l ib and the more distant edge lie of the other side 11a of the dividing member 11 delimiting the equalisation space between the medium transmission space 23 and the equalisation space 26 of the house 10 measured from the axis of rotation 44 of the control body 40.

Also illustrated on figure 6 is an arrangement relating to a further dimension requirement for the appropriate sealing off of the medium transmission space 23 and the equalisation space 26. Here the value of the central angle "μ" belonging to the external edge 31c and external edge 32c of the propulsion element 31 and propulsion element 32 closest to each other measured axis of rotation 34 of the transmission body 30 it at the most equal to the value of the central angle "λ" located between the input edge 21a falling close to the input opening 21 of the external delimiting surface part 23 a of the medium transmission space 23 and the output edge 22a falling close to the output opening 22 of the external delimiting surface part 23a of the medium transmission space, measured from the axis of rotation 34 of the transmission body 30.

Figure 7 presents an arrangement relating to another dimension requirement for the appropriate sealing of the medium transmission space 23 and the equalisation space 26. The desired sealing of the passage opening 24 and passage opening 25 - in the case of the present construction example - may also be realised if the value of the central angle "α" belonging to the whole of the external delimiting surface 41a of the sealing piece 41 measured from the axis of rotation 44 of the control body 40 is at least as much as the value of the greatest central angle "β" between the more distant edge 24a of the passage opening 24 and the more distant edge 25a of the passage opening 25 located between the medium transmission space 23 and equalisation space 26 of the house 10 measured from the axis of rotation 44 of the control body 40.

The operation of the medium transmission unit presented in figures 1-7 is the following. After the medium transmission unit has been switched on the movement- harmonisation part-unit 50 - in this embodiment - makes the axle 35 and the axle 45 move, as a consequence of which the transmission body 30 and the control body 40 start to rotate. With the rotation of the transmission body 30 the propulsion element 31 and propulsion element 32 also turn around the axis of rotation 34 and sucks the medium to be transmitted through the input opening 21 of the house 10 into the medium transmission space 23 of the internal space 20. The medium transmitted flowing through the input opening 21 into the internal space 20 on the one part flows through the passage opening 24 and on the other part through the passage opening 25 into the equalisation space 26 of the internal space 20 and fills it up after a given period of time. When the equalisation space 26 has been filled up in this way with transmitted medium, the medium transmission unit is capable of normal operation.

We present normal operation in detail during a complete rotation of the propulsion element 31 of the transmission body 30. When the propulsion element 31 of the transmission body 30 rotated by the axle 35 reaches the input opening 21 of the house 10 and passes the input edge 21a, then it seals the path of the transmitted medium that is in the medium transmission space 23 of the internal space 20, therefore, while the propulsion element 31 continues to rotate it is only able to move towards the output opening 22 in the medium transmission space 23. During this time during the rotation of the sealing piece 41 of the control body it always keep the passage opening 25 between the medium transmission space 23 and the equalisation space 26 closed, therefore, back- flow from the output opening 22 cannot take place. As the propulsion element 31 continues to rotate the propulsion element 32 already in the medium transmission space 23 approaches the output edge 22a of the medium transmission space 23, then reaches it and so leaves the medium transmission space 23, opening the end of the medium transmission space 23 at the output opening 22 end. The transmitted medium held between the propulsion element 32 and propulsion element 31 can then get out from the medium transmission space 23 through this end opening and so through the output opening 22 passing the output edge 22a it leaves the internal space 20 of the medium transmission unit. As the propulsion element 32 continues to rotate it reaches the passage opening 25 and entering this it essentially closes it off. Here we must mention that in the interest of realising appropriate operation the passage opening 25 of the internal space is slightly larger than the size of the propulsion element 32 - and also naturally than the identical propulsion element 31. When the propulsion element 32 enters the passage opening 25 during the rotation of the sealing piece 41 it slides out from in front of the side of the passage opening 25 on the equalisation space 26 side, so giving free passage to the propulsion element 32 to pass through the passage opening 25 into the equalisation space 26.

In the meanwhile the propulsion element 31 also progresses onwards and pushes in front of it the transmitted medium located in the medium transmission space. After the passage opening 25 has been closed off by either the sealing piece 41 or precisely the propulsion element 32 the medium propelled by the propulsion element 31 can only flow out of the output opening 22. When the propulsion element 32 enters the equalisation space 26 and so makes the passage opening 25 free, then the sealing piece 42 closes off the passage opening 24 near to the input opening 21 between the equalisation space 26 and the medium transmission space 23, so the medium in the equalisation space 26 is unable to leave the equalisation space 26 through the passage opening 24. As a consequence of this the propulsion element 32 entering the equalisation space 26 pushes out an amount of medium equal to its volume backwards, behind itself through the passage opening 25 into the part of the internal space 20 between the medium transmission space 23 and the output opening 22. In this phase of the operation of the medium transmission unit the propulsion element "locks" itself into the equalisation space 26 so that the sum of the transmitted medium flowing forwards through the output opening 22 from the medium transmission space 23 and of the medium flowing back from the equalisation space 26 through the passage opening 25 will has a constant value, which will be precisely the same as the value of the volume of the transmitted medium locked in the medium transmission space 23 between the propulsion element 32 and propulsion element 31. As the propulsion element 31 progresses onwards in the medium transmission space 23 towards the output opening 22, the propulsion element 32 moves away in the equalisation space 26 from the output opening 22. During this time the sealing piece 42 reaches the passage opening 25 and again closes it off, as a consequence of which the return flow realised through the passage opening 25 from the equalisation space stops, but then the transmitted medium flowing through the output edge 2a from the medium transmission space may only and exclusively leave the internal space 20 of the house 10 of the medium transmission unit through the outlet opening. Finally the propulsion element 31 itself also approaches the output edge 22a of the medium transmission space 23 near to the output opening 22, while during the rotation of the propulsion element 32 it gets in front of the passage opening 24, which the sealing piece 41 is still covering. After rotating further on the sealing piece slips out from in front of the passage opening 24, so making the passage opening itself free, however, then the sealing piece 42 passes in front of the passage opening 25, as a consequence of which the equalisation space 26 is again impassable for the transmitted medium, so it can flow from the input opening 21 towards the output opening 22 - or even back - directly through the equalisation space 26.

When the sealing piece 41 slips out from in front of the passage opening 24, then the propulsion element 32 comes out of the equalisation space 26 through the passage opening 24 in the direction of the input edge 21a of the input opening, and closes it off, now the medium transmission space 23 is enclosed behind the propulsion element 31, with it the batch of transmitted medium filling up the medium transmission space 23 completely.

While the propulsion element 32 continues to rotate the propulsion element 31 comes out of the medium transmission space 23 via the output edge 22a into the passage opening 25 and so the end of the transmitted medium propelled by it also gets into the outlet opening 22. Naturally, at this time the sealing piece 42 slips out from in front of the passage opening 25 and the propulsion element 31 may freely enter the equalisation space 26, from where it forces out an amount of medium equal to its own volume, in the same way that the propulsion element 32 did it half a revolution before. With the continued rotation of the transmission body 30 the propulsion element 31 passes the equalisation space 26 and when the sealing piece 41 turns in front of the passage opening 24, then the propulsion element 31 comes out of the equalisation space 26 and the cycle starts once again.

Figure 8 presents a version of the medium transmission unit, in the case of which the transmission body 30 has three propulsion elements, propulsion element 31, propulsion element 32 and propulsion element 33, which are evenly distributed on the transmission body. The control body also has three sealing elements, sealing piece 41, sealing piece 42 and sealing piece 43. The sealing piece 41, sealing piece 42 and sealing piece 43 are also positioned on the control body 40 with even spacing. Apart from this the house 10 also contains the input opening 21, the output opening 22, as well as the medium transmission space 23 and the equalisation space 26, furthermore, the internal space 20 containing the passage opening 24 and passage opening 25 and then the dividing member 11. The operation of this version is the same as that presented in the case of the previous construction example, but the size of the torque that may be created during operation may be increased and the specific gap losses reduced.

The structure of the medium transmission unit appearing in figure 9 differs from that visible in figure 8 in that in the house 10 there are several, in this case three internal spaces 20 with a medium transmission space 23, and accordingly, three transmission bodies 30. On each of the transmission bodies 30 there are three propulsion elements located, propulsion element 31, propulsion element 32 and propulsion element 33. However, there is only one single control body 40 which collaborates with the transmission bodies fitted into the internal space 21 of the house 10. Naturally the motion of the three transmission bodies 30 and the control body 40 is harmonised and its operating principle is the same as that presented in connection with figures 1-7. The construction according to figure 9 is especially advantageous in the case that there is only a relatively small amount of space available for the installation of the medium transmission unit serving the transportation of a specific amount of liquid. In this case in the case of the input the input pipes can be split up into three branches, each of which is connected to the input opening 21 belonging to a transmission body 30, then from the output openings 22 allocated to the individual transmission bodies 30 the ducts leaving behind the medium transmission unit can again be joined. In this case the appropriate medium flow rate can be established through the three pipes even if there is insufficient volume of space for the positioning of the medium transmission unit that would be required to receive a medium transmission unit dimensioned for a single pipe.

In figure 1 § a version of the medium transmission unit according to the invention can be seen in which the control body 40 located in the internal space 20 of the house 10 does not have the shape of a rotating body and during its operation it does not perform rotational movement either, hi the case of this construction example the control body 40 has a single sealing piece 41, about which it is true that the curve length of the external delimiting surface 41a between the two external edges 41b of the sealing piece 41 is greater than the curve length between the more distant edge 24a of the passage opening 24 and the more distant edge 24a of the passage opening 25. In the case of the fulfilment of this geometric condition the sealing piece 41 may have a position in which it closes off only the passage opening 24 or only the passage opening 25 or both the passage opening 24 and the passage opening 25 at the same time. At such a time the control body performs oscillating motion in the equalisation space 26.

In the case of figure 11 there is a single transmission body 30 located in the house 10 of the medium transmission unit, while the number of control bodies 40 is two. The control bodies 40 are capable of moving independently of one another, but their motion, along with the motion of the transmission body 30 is regulated by the movement- harmonisation part-unit 50. hi the present case the movement-harmonisation part-unit 50 includes stepping fittings 54 fixed to the propulsion element 31 and propulsion element 32, stepping fittings 55 fixed to the dividing member 11 of the house 10 as well as stepping fittings 56 located on the individual control bodies 40 and stepping fittings 57 in the delimiting surface of the equalisation space 26. It is obvious that the stepping fittings 54, the stepping fittings 55, the stepping fittings 56, and the stepping fittings 57, are controlled by suitably assembled and programmed electronics. The use of such an essentially electronically controlled movement-harmonisation part-unit 50 is practical when small amounts of very precise medium transmission are required, and its operation, in a given case, must be monitored reliably from a large distance. Such a field of application may be the pharmaceutical industry, the chemicals industry or even a gene technology laboratory.

In figure 12 a cross-sectional view of a further construction form of the medium transmission unit can be seen. Here it may be observed that in the house 10 - as opposed to that experienced in the case of the previously presented construction examples - there is no dividing member 11 separating the medium transmission space 23 and the equalisation space 26 of the internal space 20 from each other. Instead the role of the dividing member 11 is filled by the transmission body 30 itself. Also the passage opening 24 is essentially in one piece with the input opening 21, while the axle 35 is almost in one piece with the output opening 22. A further important difference is that there are two independent control bodies 40 located in the equalisation space 26, which each have a single sealing piece 41. These sealing pieces 41, however, neither perform rotational motion nor oscillatory motion, instead - regarding figure 12 - they perform an upwards and downwards motion perpendicular to the plane of the sheet, in this way they close and open the flow cross-sections of the passage opening 24 and the passage opening 25 between the medium transmission space 23 and the equalisation space 26. Naturally, the sealing pieces 41 here too are in harmonised motion with the transmission body 30 and its two, propulsion element 31 and propulsion element 32. Figure 13 shows a movement-harmonisation part-unit 50 in the case of which a guide track 58 has been worked into the transmission body 30 carrying the propulsion element 31 and the propulsion element 32 on which the guide track follower elements 59 rest. After this the guide track follower elements 59 are connected to the sealing pieces 41 of the control bodies 40.

The operation of the movement-harmonisation part-unit 50 in this case essentially realises purely mechanical control. While the transmission body 30 rotates the guide track 58 fixed to the transmission body 30 - advantageously worked into its material - also rotates. While the guide track 58 rotates the guide track follower element 59 - which is guided in the house 10 not depicted here in the direction of the axle 35 of the transmission body 30 so that it may slide - is only able to move up or down in the direction of the axle 35, with this opening the passage opening 24 and the passage opening 25 when the propulsion element 31 or the propulsion element 32 wish to pass over them. On the right side of figure 13 the situation may be seen in which the propulsion element 32 is just passing under one of the open sealing pieces 41, while the other - the left-hand- sealing piece 41 is released, in other words it is in the closed position.

Figure 14 presents a detail of a further version of the medium transmission unit according to the invention. Here the movement-harmonisation part-unit 50 serving to establish the regulated link between the transmission body 30 and the control body 40 can be observed. In this version the movement-harmonisation part-unit 50 also contains a guide track 58 worked into the transmission body 30, as well as a guide track follower element 59 connected to sealing pieces 41 of the control bodies 40, but here the guide track follower element 59 is connected to the house 10, not depicted here, with a jointed lever.

From the presented examples it clearly turns out that from the point of view of the medium transmission unit according to the invention it is not important if one or more transmission bodies 30 or control bodies 40 are in the house 10, nor is it important if there are two propulsion elements, propulsion element 31 and propulsion element 32, or more on the transmission body, or two sealing pieces, sealing piece 41 and sealing piece 42, or more on the control body. From the point of view of appropriate operation the fundamental new solution is that beside the medium transmission space 23 there is also an equalisation space that with the help of the closable passage opening 24 and passage opening 25 is connected to the medium transmission space 23 so that at a given moment during operation it is able to open and permit the passing of the given propulsion element 31 or propulsion element 32 of the transmission body 30 and the replace the appropriate amount of medium from the medium in the equalisation space 26 in the direction of the medium transmission space 23. hi this way completely even and precisely regulated medium transmission can be established between the input opening 21 and the output opening 22 of the medium transmission unit.

It is obvious that the size of the transmitted amount depends on the speed of rotation of the transmission body, so it may be changed as a function of the rate of rotation. Since, however, this is a question of regulation belonging to the current state of the art, it is not a part of this invention.

The medium transmission unit according to the invention may be effectively applied in all places where the continuous even transmission of precise amounts of liquids are required, whether there be large or small volumes in question.

List of references

house 11 dividing member 11a other side l ib more distant edge l ie more distant edge Hd one side

12 one axle opening

13 other axle opening

internal space 21 input opening 21a input edge

22 output opening 22a output edge

23 medium transmission space

23 a external delimiting surface part

24 passage opening 24a more distant edge

25 passage opening 25a more distant edge

26 equalisation space

transmission body 31 propulsion element

31a external delimiting surface 31b internal delimiting surface 31c external edge

32 propulsion element

32a external delimiting surface 32b internal delimiting surface 32c external edge

33 propulsion element

34 axis of rotation

35 axle

control body 41 sealing piece

41a external delimiting surface 41b external edge

42 sealing piece

42a external delimiting surface 42b external edge

43 sealing piece

44 axis of rotation

45 axle 50 movement-harmonisation part-unit 51 drive wheel

52 intermediate member

53 driven wheel

54 stepping fitting

55 stepping fitting

56 stepping fitting

57 stepping fitting

58 guide track

59 guide track follower element

"h" external delimiting shell

"H" external delimiting shell

"r" radius

"R" radius

"T" distance

"α" central angle

"β" central angle

"ω" central angle

"φ" central angle

"μ" central angle

"λ" central angle

Claims

1. Medium transmission unit with circulation blades for the realisation of even medium transmission, which has a medium transmission space, as well as a house surrounding the internal space containing the input opening and the output opening connected to the medium transmission space, furthermore, propulsion elements serving to force the flow of the medium between the input opening and the output opening, and a transmission body carrying them, and also a control body allocated to the transmission body via a movement-harmonisation part-unit, where the control body has one or more closing pieces protruding into the internal space of the house, and the transmission body and the control body are fitted into the house in such a way that they cannot move, characterised by that there is an equalisation space (26) established in the internal space (20) of the house (10) which is periodically connected to the medium transmission space (23) through passage openings (24, 25), where at least some of the sealing pieces (41, 42) of the control body (40) are arranged in the equalisation space (26) in such a way so that they cannot move, furthermore the number of propulsion elements (31, 32) positioned on a transmission body (30) is at least two, the propulsion elements (31, 32) are coincident, the part of space through which the propulsion elements (31, 32) pass has a rotational body ring shape, and the propulsion elements (31, 32) are of a size and shape adapted to the size and shape of the cross-section of the medium transmission space (23), they have the geometric shape that fills in the cross-section of the medium transmission space (23).

2. The medium transmission unit with circulation blades according to claim 1, characterised by that there is a dividing member (11) located between the medium transmission space (23) and the equalisation space (26), the transmission body (30) is arranged on one side (1 Id) of the dividing member (11) and the control body (40) on the other side (1 Ia) of the dividing member (11).

3. The medium transmission unit with circulation blades according to claim 1 or 2, characterised by that it has more than one transmission bodies (30) and the transmission bodies (30) are associated to the same control body (40).

4. The medium transmission unit with circulation blades according to any of claims 1-3, characterised by that it has more than one control body (40) and the control bodies (40) are associated with the same transmission body (30).

5. The medium transmission unit with circulation blades according to claim 4, characterised by that there is a single sealing piece (41) located on the one control body (40).

6. The medium transmission unit with circulation blades according to claim 1 or 2, characterised by that the number of sealing pieces (41, 42) arranged on the one control body (40) is at least two.

7. The medium transmission unit with circulation blades according to claim 1 or 2, characterised by that the number of propulsion elements (31, 32) located on one transmission body (30) and the number of sealing pieces (41, 42) arranged on a control body (40) are the same as each other.

8. The medium transmission unit with circulation blades according to any of claims 1-7, characterised by that the part of the space through which the sealing pieces (41, 42) of the control body (40) pass through has the shape of a rotational body ring or a rotation body ring section.

9. The medium transmission unit with circulation blades according to any of claims 2-8, characterised by that the distance (T) measured between the axis of rotation (34) of the transmission body (30) and the axis of rotation (44) of the control body (40) is of a value equal at the most to the sum of the number indicating the length of the radius (r) belonging to the external delimiting shell (h) of the space part through which the propulsion elements (31, 32) pass and of the radius (R) belonging to the external delimiting shell (H) of the space part through which the sealing pieces (41, 42) pass.

10. The medium transmission unit with circulation blades according to any of claims 2-9, characterised by that in the case of at least a part of the sealing pieces (41, 42) the value of the central angle (α) of the external delimiting surface (41a, 42a) belonging to the given sealing piece (41, 42) measured from the axis of rotation (44) of the control body (40) reaches the value of the greatest central angle (β) between the most distant edges (24a, 25a) of the passage openings (24, 25) located between the medium transmission space (23) of the house (10) and the equalisation space (26) from the axis of rotation (44) of the control body (40).

11. The medium transmission unit with circulation blades according to any of claims 2-10, characterised by that in the case of a part of the sealing pieces (41, 42) the value of the central angle (co) belonging to the external edges (41b, 42b) of two sealing pieces (41, 42) closest to each other measured from the axis of rotation (44) of the control body (40) is at most equal to the value of the greatest central angle (φ) between the more distant edges (l ib, l ie) of the other side (Ha) of the dividing member (11) delimiting the equalisation space (26) located between the medium transmission space (23) of the house (10) and the equalisation space (26) measured from the axis of rotation (44) of the control body (40).

12. The medium transmission unit with circulation blades according to any of claims 2-11, characterised by that in the case of at least a part of the propulsion elements (31, 32) the value of the central angle (μ) belonging to the external edges (31c, 32c) closest to each other of two neighbouring propulsion elements (31, 32) measured from the axis of rotation (34) of the transmission body (30) is at the most equal to the value of the greatest central angle (λ) located between the input edge (21a) of the part of the external delimiting surface (23a) of the medium transmission space (23) close to the input opening (21) and the output edge (22a) of the part of the external delimiting surface (23 a) of the medium transmission space (23) close to the output opening (22) measured from the axis of rotation (34) of the transmission body (30).

13. The medium transmission unit with circulation blades according to any of claims 1-12, characterised by that the external delimiting surface (31a, 32a) and the internal delimiting surface (31b, 32b) of the propulsion elements (31, 32) is a cylindrical shell piece, furthermore, the propulsion elements (31, 32) are distributed evenly over the transmission body (30).

14. The medium transmission unit with circulation blades according to any of claims 1-13, characterised by that the external delimiting surface (41a, 42a) and the internal delimiting surface (41b, 42b) of the sealing pieces (41, 42) is a cylindrical shell piece, furthermore, the sealing pieces (41, 42) are distributed evenly over the control body (40).

15. The medium transmission unit with circulation blades according to any of claims 1-14, characterised by that the movement-harmonisation part-unit (50) is a mechanical drive transfer unit.

16. The medium transmission unit with circulation blades according to any of claims 1-14, characterised by that the movement-harmonisation part-unit (50) has stepping fittings (54, 55, 56, 57), e.g. electromagnetic members, arranged on the transmission body (30) and/or on the control body (40) and/or on the house (10).

17. The medium transmission unit with circulation blades according to any of claims 1-14, characterised by that the movement-harmonisation part-unit (50) has a guide track (58) as well as a guide track follower (59) linked to the control body (40) and at least periodically touching the surface of the guide track (58).