Modular system for producing a screw spindle pump

Abstract

A modular system for producing a screw spindle pump having a housing with a drive spindle therein and at least one running spindle meshing with the drive spindle, including: a plurality of housing components including a basic housing component exhibiting a fluid inlet for the formation of a basic pump chamber, a housing pressure component exhibiting a fluid outlet, bearing the drive spindle for creating a pressure chamber, a housing cover arranged on the basic housing part for supporting running spindle, and identical intermediate housing components arrangeable in any number between the basic housing component and the housing pressure component and form an additional pump chamber in each case; and a plurality of running spindle elements including at least one running spindle base element arranged in the basic housing component, and identical running spindle extension elements arranged in the intermediate housing components.

Claims

1. A modular system for constructing a screw spindle pump, comprising: a drive spindle; at least one running spindle to mesh with the drive spindle to move fluid from a fluid inlet to a fluid outlet in an axial direction; and a housing including: a basic housing component having the fluid inlet and a basic pump chamber, a housing pressure component having the fluid outlet and forming a pressure chamber, a housing cover arrangeable on the basic housing component, and a plurality of identical intermediate housing components, wherein any number of the intermediate housing components is selectively arrangeable between the basic housing component and the housing pressure component so as to form a corresponding number of additional pump chambers that together with the basic pump chamber form a common pump chamber, the at least one running spindle including: at least one running spindle base element arrangeable in the basic housing component, and a plurality of identical running spindle extension elements, wherein any number of the running spindle extension elements is selectively arrangeable in the selected number of intermediate housing components so that the at least one running spindle base element and the number of running spindle extension elements form the running spindle, wherein the housing cover is configured to support the at least one running spindle, wherein when the drive spindle, the at least one running spindle and the housing are configured so that when the drive spindle, the at least one running spindle and the housing are assembled the drive spindle extends parallel to the at least one running spindle, through the housing pressure component and into the basic pump chamber so that the drive spindle and the at least one running spindle move the fluid from the fluid inlet to the fluid outlet.

2. The modular system according to claim 1, wherein the division of the basic housing component and the intermediate housing components and also the running spindle elements is identical.

3. The modular system according to claim 1, wherein the running spindle extension elements and the running spindle base elements only abut one another with their planar end faces.

4. The modular system according to claim 1, wherein at least the intermediate housing components have axial through-holes in an arrangement distributed about the periphery with a screw head recess on the end face and axial threaded holes, wherein the through-holes and the threaded holes are provided in an alternating arrangement to one another.

5. The modular system according to claim 1, wherein the housing pressure component comprises two housing pressure component elements connected or connectible to one another axially via screw connections.

6. The modular system according to claim 1, wherein only through-holes are formed on the housing pressure component, where necessary with screw head recesses on the end face, or that only through-holes are formed on the axially outer housing pressure component element, where necessary with screw head recesses on the end face, and axial through-holes with a screw head recess on the end face, and also axial threaded holes are formed on the axially internal housing pressure component element in an arrangement distributed about the periphery, wherein the through-holes and the threaded holes are provided in an alternating arrangement to one another.

7. The modular system according to claim 1, wherein the basic housing component has threaded holes on both axial end faces.

8. The modular system according to claim 1, wherein the length of the running spindle base elements is greater than the length of the running spindle extension elements.

9. The modular system according to claim 1, wherein the end or ends of the running spindle base elements arranged adjacent to the housing cover are received in the alignment sleeves used to align an axial thrust.

10. A pump produced using a modular system according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) In the drawing:

(2) FIG. 1 shows a representation of the individual parts of the modular system according to the invention,

(3) FIG. 2 shows a partial sectional view of a first pump produced from the modular system according to FIG. 1 and also the essential parts thereof shown in an exploded view,

(4) FIG. 3 shows a partial sectional view of a next-sized pump and also the necessary essential parts thereof,

(5) FIG. 4 shows a partial sectional view of the next-sized pump, in turn, alongside a representation of the essential parts,

(6) FIG. 5 shows a partial sectional view of the largest pump that can be produced from the modular system according to FIG. 1,

(7) FIG. 6 shows a perspective view of an intermediate housing component,

(8) FIG. 7 shows a partial sectional view through the pump from FIG. 2 in a further sectional plane, and

(9) FIG. 8 shows a partial sectional view through the pump from FIG. 5 in a further sectional plane.

DETAILED DESCRIPTION OF THE INVENTION

(10) FIG. 1 shows a modular system 1 according to the invention, the central parts whereof are shown individually. The connection screws required in each case are not shown and also the respective size-specific drive spindles.

(11) Starting from left to right, the modular system 1 comprises a housing cover 2, two alignment sleeves 3 (the screw spindle pumps that can be produced according to the invention have two running spindles in the example shown), a basic housing component 4, two running spindle base elements 5, four intermediate housing elements 6, eight running spindle extension elements 7, and also two housing pressure component elements 9, 10 forming a housing pressure component 8. The basic housing component 4, the intermediate housing elements 6 and also the housing pressure component elements 9, 10 have corresponding holes, on the one hand to receive the drive spindle which is not shown and to store and seal it in the case of the housing pressure component 8 and in order to receive the corresponding running spindles formed from the running spindle base elements 5 and the running spindle extension elements 7.

(12) The basic housing component 4 has a fluid inlet 11 and forms a basic pump chamber. The housing pressure component 8 has a fluid outlet 12 on the housing pressure component element 9. Moreover, it forms a pressure chamber along with the housing pressure component element 9, which pressure chamber communicates with the fluid outlet 12.

(13) Within the modular system 1 the intermediate housing components 6 and also the running spindle extension elements 7 are designed identically to one another. This, and the fact that with each pump size that can be produced with the help of the modular system 1, the housing cover 2, the housing base element 4 and also the housing pressure component or else the housing pressure component elements 9 and 10 always have to be installed, means that as a consequence any pump sizes can be produced from corresponding identical parts.

(14) FIGS. 2-5 show different pumps that can be made from the modular system 1 according to FIG. 1, wherein the same reference numbers are used for the same components in each case.

(15) FIG. 2 shows a pump 13 according to the invention in the shortest variant. Apart from a drive spindle 14, which can be individually produced size-specifically as a single component in each case, this is made up of the housing cover 2, the basic housing component 4, the two housing pressure component elements 9, 10, and also the two running spindle base elements 5 and the two alignment sleeves 3. The running spindle base elements 5 are received exclusively in the basic housing element 4. The division between the basic housing element 4 and the housing pressure element 8 or else the housing pressure element 9 is selected in such a manner that the running spindle base elements 5 end exactly at the dividing or separating plane.

(16) Furthermore by way of example, a connection screw 15 is shown which is used to connect the housing pressure component element 10 to the housing pressure component element 9. For this purpose, the housing pressure component element 10 has a corresponding through-hole 16 with a screw head socket 17, while the housing pressure component element 9 has a corresponding threaded hole 18 into which the connection screw 15 is screwed. In the example shown, three screw connections of this kind are made in the example shown.

(17) On account of the sectional plane chosen, the screw connection of the housing pressure component 9 to the basic housing component 4 is not shown. In this respect, reference is made here to FIG. 7, where another sectional plane is shown. A connection screw 19 is shown there which passes through a corresponding through-hole 20 with a screw head socket 21 which is formed in the housing pressure component element 9 and is screwed into a corresponding threaded hole 22 in the basic housing element 4. It goes without saying that here, too, a plurality of screw connections of this kind is provided distributed about the periphery.

(18) In this view, the corresponding through-holes 23 which pass through the housing cover 2 are shown, into which corresponding connection screws not shown in further detail are inserted, which connection screws are screwed into corresponding threaded bores on the end face of the basic housing element 4, likewise not shown.

(19) In the component representation likewise shown in FIG. 2, the system parts used here are depicted once again, apart from the corresponding connection screws.

(20) FIG. 3 shows a second pump 13 that can be produced from the modular system 1 in a next pump size. This pump 13 is also made up in this case of the housing cover 2, the basic housing component 4, the two housing pressure component elements 9, 10, and also the two running spindle elements 5 and the alignment sleeves 3. In addition, in this case an intermediate housing component 6 is placed between the basic housing component 4 and the housing pressure component element 9, in which two running spindle extension elements 7 are also received, only one of which can be seen in this case. The separating planes, in other words the dividing planes between the basic housing component 4 and the intermediate housing element 6 and also between the intermediate housing element 6 and the housing pressure component element 9, and the separating plane between the running spindle base element 5 and the running spindle extension element 6, on the one hand, and the end of the running spindle extension element 7 coincide, in other words, the length of the intermediate housing component 6 corresponds exactly to the length of the running spindle extension element 7. The running spindle base element 5 and the running spindle extension element 7 lie with their axial, planar end faces only abutting one another; they are not connected to one another. They are, however, carried along via the engagement of the corresponding thread flanks with the thread flanks of the drive spindle 15 in a manner known per se.

(21) Furthermore shown here is a connection screw 24 via which the intermediate housing component 6 is connected to the basic housing component 4. A plurality of through-holes 25 with corresponding screw head sockets 26 is formed on the intermediate housing component 6, see also FIG. 6 in this respect, while the threaded holes 22 are configured on the end face of the basic housing component 4, as already described. The corresponding connection screws 24 are screwed into said threaded holes.

(22) As shown in FIG. 6, alongside the through-holes 25 on the corresponding end face, threaded holes 27 are also provided as blind holes (this applies to all threaded holes). These threaded holes 27 serve to receive connection screws 19, as have already been described in relation to FIG. 7, and as are also shown by way of example in FIG. 8, where the housing pressure component element 9 is connected via these connection screws 19 to an intermediate housing component 6. The connection screws 19 are screwed into the corresponding threaded holes 27 via which the component connection is made.

(23) In the component representation likewise shown in FIG. 3, it can be seen that to this extent identical components to those in the case of the pump 13 from FIG. 2 are used, but in addition an intermediate housing component 6 and also the running spindle extension elements 7 arranged therein and exhibiting the identical length to the intermediate housing component 6.

(24) The next larger expansion stage of the pump 13 that can be produced from the modular system according to the invention is shown in FIG. 4. Here, identical components to those in the case of the pump 13 from FIG. 3 are provided; in addition, in this case a further intermediate housing component 6 and also two other running spindle extension elements 7 are provided. In other words, the entire pump chamber has been lengthened once again with the additional pump chamber realized by means of an intermediate housing component 6 in conjunction with the running spindle extension elements 7.

(25) In order to connect two intermediate housing elements 6, connection screws 28 are in turn used which pass through the one intermediate housing component 6 into the through-holes 25 and are received with their screw heads recessed in the screw head sockets 26. The connection screws 28 are screwed into the corresponding blind threaded holes 27 on the adjacent intermediate housing element 6. It should be noted that the two intermediate housing components 6 are turned relative to one another through 180, so that the through-holes 25 of the one intermediate housing component 6 align with the threaded holes 27 of the other intermediate housing component 6. This is possible due to the separation of the through-holes 25 and the threaded holes 27 by 120 in each case.

(26) It should also be noted here that in turn the separation of the housing components, in other words the separation of the basic housing component 4 and also the intermediate housing components 6 and the housing pressure component element 9 and the corresponding dividing planes of the running spindle elements, in other words the running spindle base element, and also the two running spindle extension elements 7 are identical, or else the corresponding dividing planes coincide.

(27) Finally, FIG. 5 shows a partial sectional view of a pump 13 according to the invention in the expansion stage that can be produced starting from the modular system according to FIG. 1. Likewise, the same components as in the pump according to FIG. 4 and also, in addition, two further intermediate housing components 6 and also four further running spindle additional elements 7 are provided. In this case, therefore, the pump chamber is extended by two further additional pump chambers formed via the additional intermediate housing elements 6, so that a maximum pump chamber comprising the base pump chamber and also four additional pump chambers results. This pump 13 is the most efficient, highest pressure-supplying pump, starting from the parts number shown in FIG. 1. Theoretically, the pump can of course be extended to any length, which means that pumps which are longer than those shown in FIG. 5 can also be produced using the system according to the invention.

(28) The intermediate housing components 6 are in turn connected to one another by connection screws 28; see in addition the view according to FIG. 8 which shows another sectional plane.

(29) The individual representation is not shown here, as it is identical to the representation in FIG. 1.

(30) As shown in FIGS. 2-5, only the drive spindle 14 in each case is the single component that has to be made individually for the respective pump size. The reason for this is that it is a one-piece spindle, while the running spindles in each case are all modular comprising the running spindle base elements 5 and the running spindle extension elements 7. As already mentioned, the running spindle base and extension elements 5, 7 are not connected to one another; instead, they only abut one another with their planar end faces, in order to facilitate a hydrodynamic plain bearing mounting exclusively within the respective housing portion and so that there are no friction problems in the region of the component transitions or dividing planes in each case.

(31) While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.