CA2105359A1 - Electrically driven pump for liquids - Google Patents
Electrically driven pump for liquidsInfo
- Publication number
- CA2105359A1 CA2105359A1 CA 2105359 CA2105359A CA2105359A1 CA 2105359 A1 CA2105359 A1 CA 2105359A1 CA 2105359 CA2105359 CA 2105359 CA 2105359 A CA2105359 A CA 2105359A CA 2105359 A1 CA2105359 A1 CA 2105359A1
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- Canada
- Prior art keywords
- pump
- pump according
- closure element
- orifice
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Abstract
A B S T R A C T
1. Electrically driven pump for liquids.
2.1 An electrically driven pump 1 exhibits a pump casing 2 that is provided with a suction orifice 3 and an outlet orifice 4 and in which a pump chamber 5 is arranged connected with the suction and outlet orifice, and which in part extends between field producing elements 6 arranged in the pump casing 2 and in which a rotor 7 of an electric motor connected to a feed wheel 8 is arranged pivoted on a bearing shaft 9. In a circular orifice 11 of the pump casing 2, a closure element 12 is pivotally attached, forming a wall of pump chamber 5. The pump is to be constructed in such a manner as to operate securely even under difficult operating conditions.
2.2 To this end, the shaft 9 carrying the rotor 7 of the electric motor as well as the feed wheel 8 of the pump is pivoted in the closure element 12 in such a manner that upon removing the closure element 12 from the circular orifice 11 of the pump casing 2, the rotor 7, the feed wheel 8, the shaft 9 and the closure element (12) carrying these elements form a cohesive unit.
2.3 Based on the mounting of the shaft in the closure element, a separate handling of the shaft is not required; cleaning and servicing processes can therefore be carried through in a very short time, even by laymen.
1. Electrically driven pump for liquids.
2.1 An electrically driven pump 1 exhibits a pump casing 2 that is provided with a suction orifice 3 and an outlet orifice 4 and in which a pump chamber 5 is arranged connected with the suction and outlet orifice, and which in part extends between field producing elements 6 arranged in the pump casing 2 and in which a rotor 7 of an electric motor connected to a feed wheel 8 is arranged pivoted on a bearing shaft 9. In a circular orifice 11 of the pump casing 2, a closure element 12 is pivotally attached, forming a wall of pump chamber 5. The pump is to be constructed in such a manner as to operate securely even under difficult operating conditions.
2.2 To this end, the shaft 9 carrying the rotor 7 of the electric motor as well as the feed wheel 8 of the pump is pivoted in the closure element 12 in such a manner that upon removing the closure element 12 from the circular orifice 11 of the pump casing 2, the rotor 7, the feed wheel 8, the shaft 9 and the closure element (12) carrying these elements form a cohesive unit.
2.3 Based on the mounting of the shaft in the closure element, a separate handling of the shaft is not required; cleaning and servicing processes can therefore be carried through in a very short time, even by laymen.
Description
-` 2~0~9 DESCRIPTION .
The invention is concerned with an electrically driven pump for li~uids with the characteristics of the introductory part of claim 1. ~-A known electrically driven pump for liquids has a pump casing that is provided with a suction orifice and an outlet orifice.
The suction orifice may be arranged either directly below the water level of a container or be provided with a suction pipe, so that when the pump is operated, water is sucked into pump casing.
The outlet orifice is shaped in such a manner that liquid conveying elements can be connected to it.
A pump chamber that is connected to the suction and outlet orifices is arranged in the pump casing. A rotor of an electric motor connected to a feed wheel is attached to a bearing shaft in the pump chamber, with the rotor extending between the field producing elements arranged in the pump casing. In addition, a closure element is provided at the pump casing, which is attached pivoted in a circular orifice of the pump casing and quasi forms a wall of the pump chamber. The closure element serves to enable engaging the pump casing, when, for example, dirt particles have been sucked into the pump chamber and prevent the rotor from starting when the pump is switched on.
In this state of the art, the shaft of the rotor and of the feed wheel is attached to the pump chamber's rear wall opposite to the ~ ~-closure element. As soon as the closure element is removed from the orifice of the pump casing, the rotor of the electric motor and the feed wheel can be pulled off and submitted to a cleaning process. Since the shaft is only plugged into the rear wall of the pump casing, there is a risk that during removal of the rotor and the ~eed wheel the shaft may also slide out of the orifice holding it. Assembly of this element is not without its - 210~3~9 problems, at least for the layman. It must also be feared that ~' bearing parts may be damaged and shaft parts may be bent, so that problem-free operation of the pump cannot always be guaranteed after repeated disassemblies.
The invention has the task of improving the electrically driven -~
pump for liquids by means of the characteristics of claim 1 in such a way that secure pump operation is assured also under difficult operating conditions. This task is solved by the specific characteristics of claim 1 in that the rotor of the electric motor as well as the connected feed wheel of the pump carrying shaft is pivoted on the closure element in such a manner -~
that upo-n removing the closure element from the circular orifice ~ ;~
of the pump casing, the rotor, the feed wheel, the shaft and the closure element carrying these elements form a unit. When the operator pulls the closure element out of the orifice, shaft, feed wheel and rotor hang on it, and the entire unit can be cleaned under running water, for example, and then be reinserted in the pump casing in one single manipulation. By virtue of the shaft being mounted in the closure element, separate handling of the shaft is not necessary. A cleaning and servicing process can therefore be carried through in a very short time, even by laymen.
Insofar as an additional recess is provided in the rear wall of the pump chamber to support the free end of the shaft, into which recess the shaft can be inserted when returning the closure element into the orifice, an especially stable and vibration-free shaft mounting will result at both shaft-ends. When, according to claim 3, the recess in the pump chamber wall opposite the clo,~,ure element opens funnel-shaped towards the closure element, the insertion operation ef'fected by the operator is eased, a selr-centering ef'fect is obtained, bearing parts mutually impacting during thç insertion operation are protected, bending of the shaft and damage to the bearing edges are prevented;
- 210~359 ~:
,::
..
A rotor safety element is to be arranged at the free end of the shaft, which advantageously can display an apex aligned with the -~
shaft. The rotor safety element is inserted i~to the recess in the wall of the pump chamber during the insertion operation. --'; ,~
By the characteristics of claim 6 it is assured, on the one hand, that the pump will run particularly quietly, and on the other hand, cants of the closure element will not lead to bearing damage and to bending of the bearing shaft during removal and insertion.
The diameter of the rotor is advantageously smaller than the diameter of the feed wheel; the feed wheel can be arranged in a ~ -section-of the pump chamber that is enlarged in compa~ison to the rotor section of the pump chamber, whereby the pump output can be increased.
Advantageously, a cylindrically shaped diaphragm radially surrounding the feed wheel outside can be arranged at the closure element and which has at least one adjusting orifice that can be brought to overlap the outlet orifice. The adjusting orifice can be brought to more or less overlap the outlet orifice from the pump chamber, by which the pump output can be adjusted with particular effectiveness. An especially sensitive control of the pump output is made possible by the characteristics of ciaims 13 and 14.
It is also possible, however, to arrange at the closure element only a control segment that can more or less be brought to overlap the outlet orifice of the pump chamber. When - as provided in claim 16 - the control segment is shaped in the manner o~ a wedge dlaphragm, control can accordingly be effected sensitlvely.
`` 2~3~9 Claim 17 is concerned with a particularly advantageous arrangement of the suction orifice, which is to run between the bottom free ends of the field producing elements of ~he pump~s motor. This makes it possible to run the field producing elements, also called stators, far around the rotor, almost without interruption to the bottom side of the pump, whereby a strong pumping run and start of the pump are assured. The suction orifice is preferably a groove, corresponding approximately to the depth of the pump chamber section holding the rotor of the pump motor.
An adjusting device influencing the suction flow can be arranged in the suction orifice. This makes possible control of the pump output similar to that performed by the wedge diaphragm control in the pump outlet area. Control of the pump output can be done with particular sensitivity when the control slide valve is provided with a shaft drive which has a control button projecting from the pump casing. This is of particular importance because the pump can also be used as an indoor fountain pump, and precisely adjustable and reproducible pump output conditions are particularly important in a room, since it must absolutely be prevented that water be splashed out beyond the area of the indoor fountain.
In smaller pumps it is sufficient that the closure element, which is to hold the rotor shaft, be secured in the casing by means of an O-ring-clamp. In larger dimensioned pumps, however, the internal pressure in the pump chamber rises so much that the o- `~
ring-clamp may possibly no longer be sufficient. It is then particularly advantageous that the closure element be fastened in the casing in the manner o~ a bayonet lock.
It i8 ~urthermore particularly advantageous to attach the pump with its bottom flanged joint to a suction base, which displays a large dimensioned suction plate that can have a diameter ~ 5359 ~:
approximately equal to or even larger than the diameter of the pump casing. In this manner, the pump, which more or less is to serve as carrier for an entire fountain system, can be securely fastened to the bottom of a fountain basin or, for example, to a metal plate embedded in a pool. The suction plate of the suction base can advantageously be provided with a mechanical adjusting device to lift the center of the suction plate, by which a particularly good hold of the suction plate on the substratum can be achieved.
Additional advantageous characteristics of the suction base, in which a filter chamber is incorporated, result from the subsequent claims. -~
: .
The invention is illustrated in more detail by the exemplified embodiments in the drawing figures. These show:
Fig. 1 a longitudinal section through an electrically driven pump for liquids with a cross section through an attachable base part and an attachable liquid conveying element;
Fig. 2 a schematic cross-sectional view through the pump casing with the removed closure element;
Fig. 3 three alternative specific embodiments of the closure element, namely ! Fig. 3a with pump output control and Fig. 3b without pump output control Fig. 4 A longitudinal section through an alternative specific ;;~
embodiment of a pump 219S3S~
Fig. 5 A cross section along V/V in Fig. 4 ig. 6 A cross section through a pump with a suction base attachable to it ig. 7 A cross section through a pump for li~uids with outflow control by means of a wedge diaphragm Reference is first made to Fig. 1. The electrically driven pump 1 for liquids shown there has a pump casing 2 that is provided with a suction orifice 3 and an outlet orifice 4. In the pump casing 2, a pump chamber 5 is arranged connected with the suction and outlet orifices, which at least partially extends between field producing elements arranged in pump casing 2, which are indicated by arrows 6. In the casing area of the fieid producing elements 6, a rotor 7 of an electric motor connected to a feed wheel 8 is pivoted on a bearing shaft 9. In a circular orifice 11 in the casing wall 10 a closure element 12 is attached, which has an outwardly projecting handle 13, by which it can be turned in orifice 11. The inside 14 of the closure element 12 forms a section of the pump chamber wall, the closure element 12 is fastened in orifice 11 with clamp fit by means of an O-ring-seal 15.
The extreme end 20 of shaft 9 is centrally fastened in a recess 21 of the inside 14 of the closure element 12, so that the shaft 9 also turns when the handle 13 is turned towards the pump casing 2. The elements 7 and 8 pivoted on shaft 9 either follow this turning or at least a detaching is assured from these parts of dirt particles that can be found inside the pump chamber 5. By turning the handle 13 towards the pump casing 2, an assist to starting the pump is thus made possible, if the pump should indeed experience starting dlfficulties.
.. .. .... ... .. .. . . .. . .
- 2io53~9 The free end 22 of shaft 9 rests in the final assembly position in a funnel-shaped recess 23 in the wall 24 of.pump chamber 5 holding the rotor 7 opposite to the closure element 12, whereby, upon insertion of the shaft 9 with rotor 7 and feed wheel 8 into the pump casing 2, a centering of the shaft in its desired position takes place. At the free end 22 of shaft 9, a rotor safety element 25 is mounted, which has an apex 26 aligned with shaft 9 and which dips into the funnel-shaped recess 23.
The end 20 of shaft 9 arranged in the closure element 12 rests in an elastic bearing part 30 which is shaped as a rubber or elastic plastic sleeve.
It can furthermore be gathered from figure 1 that the diameter of ~eed wheel 8 is smaller than the diameter of the closure element 12 and that the diameter of rotor 7 is smaller than the diameter of feed wheel 8. The diameter of the section of the pump chamber holding the rotor 7 is smaller than the diameter of the feed wheel 8, which results in an improvement of the pump output.
Drawing 2 shows the parts already described in detail in drawing 1, but with the connected unit of closure element 12 with handle 13, shaft 9, feed wheel 8, rotor 7 and rotor safety element 25 ;
pulled out from pump chamber 5 of pump casing 2. When this subassembly is inserted into the pump casing 2 in the di~ection o~ arrow 35, the apex 26 of the rotor safety element 25 adjoins the correspondingly shaped inside surfaces of recess 23, whereby a fixing of the shaft 9 in its desired operating position is effected.
In the ~ollowing, reference i8 now made to drawings 3a and b.
There, the subassembly made up of closure element 12, shaft 9, rotor 7 and feed wheel 8 is again shown. In the exemplified embodiment shown in Fig. 3a, a cylindrical diaphragm 40 radially ~
surrounding the feed wheel 8 on the outside is arranged at the ~-_ 7 _ ~
closure element 12, which has an adjusting orifice 51 that can be brought to overlap with outlet opening or outlet groove 50, respectively. The adjusting orifice 51 has a long-stretched form narrowing in wedge-shape and runs along the circumference of diaphragm 40. In the exemplified embodiment illustrated it covers a segment area of about 90 of diaphragm 40.
Also indicated in drawing 1 are a pedestal base 60 and a liquid conveying element 61, which can be connected to the pump casing 2 by way of the flanged joints 62, 63.
In the following, reference is made to figures 4 and 5. The pump for liquids 1 shown there with its pump casing 2 differs from the pump shown in Fig. 1 in that the flanged joints 62 and 63 are of sven dimensions, which in principle opens up the possibility of attaching li~uid conveying elements 61 to both the top and bottom of pump 1. ;
., In addition, it clearly results from the sectional drawing according to Fig. 5 that the suction orifice 3 runs between the bottom free ends of the stators 6, i.e., the stators surround rotor 7 to the largest possible extent and leave a slot only at the bottom, in which the suction orifice 3 is arranged. ~-The suction orifice can have different lengths, the maxi~um length o~ the suction orifice 3 can approximately correspond to the depth D (cf. Fig. 4) of the section of pump chamber 5 holding the rotor 7.
I
In suction ori~ice 3, an ad~usting device 70 is arranged, which in~luences the suction ~low and which includes a slide valve 71 that can be inserted in the groove of suction orifice 3 as well as a shaft drive 72, wherein the shaft drive 72 carries a control button 73 projecting from the pump casing 2.
210S3~
In the following reference is made to Fig. 6. It shows below the pump a suction base 80 with a suction plate 81,.the diameter of which approximately corresponds to the diameter of pump casing 2.
The suction base 80 is connected to a mechanical adjusting device in the form of a control lever 83, whereby the center 85 of the suction plate 81 can be lifted and lowered by way of a connecting part 84. In this manner, a concave curvature of the suction plate 81 can be achieved, which assures a strong vacuum and thus ~-a particularly strong hold on the substratum attached by suction.
Inflow orifices 86, connected to the flanged joint 62 of pump casing 2, are provided above the suction plate 81. In the flow area between the inflow orifices 86 and the flanged joint 62, there is a filtering chamber 87 which at least in part is filled ;
with a filtering material 88, for example, a sponge. The ad~sting device, namely the control lever 83, runs across the filtering chamber 87.
In the following, reference is made to Fig. 7 which serves only to again clearly show the position of the wedge diaphragm 90, ;
which is arranged at the closure element 12. As partial figure 7a makes particularly clear, the wedge diaphragm 90 can be brought in front of the outlet orifice 4 by turning and exercises, depending on its turning position in relation to the outlet orifice 4 and by virtue of its wedge shape, a more or less strong blocking action which has an effect on the pump output.
The invention is concerned with an electrically driven pump for li~uids with the characteristics of the introductory part of claim 1. ~-A known electrically driven pump for liquids has a pump casing that is provided with a suction orifice and an outlet orifice.
The suction orifice may be arranged either directly below the water level of a container or be provided with a suction pipe, so that when the pump is operated, water is sucked into pump casing.
The outlet orifice is shaped in such a manner that liquid conveying elements can be connected to it.
A pump chamber that is connected to the suction and outlet orifices is arranged in the pump casing. A rotor of an electric motor connected to a feed wheel is attached to a bearing shaft in the pump chamber, with the rotor extending between the field producing elements arranged in the pump casing. In addition, a closure element is provided at the pump casing, which is attached pivoted in a circular orifice of the pump casing and quasi forms a wall of the pump chamber. The closure element serves to enable engaging the pump casing, when, for example, dirt particles have been sucked into the pump chamber and prevent the rotor from starting when the pump is switched on.
In this state of the art, the shaft of the rotor and of the feed wheel is attached to the pump chamber's rear wall opposite to the ~ ~-closure element. As soon as the closure element is removed from the orifice of the pump casing, the rotor of the electric motor and the feed wheel can be pulled off and submitted to a cleaning process. Since the shaft is only plugged into the rear wall of the pump casing, there is a risk that during removal of the rotor and the ~eed wheel the shaft may also slide out of the orifice holding it. Assembly of this element is not without its - 210~3~9 problems, at least for the layman. It must also be feared that ~' bearing parts may be damaged and shaft parts may be bent, so that problem-free operation of the pump cannot always be guaranteed after repeated disassemblies.
The invention has the task of improving the electrically driven -~
pump for liquids by means of the characteristics of claim 1 in such a way that secure pump operation is assured also under difficult operating conditions. This task is solved by the specific characteristics of claim 1 in that the rotor of the electric motor as well as the connected feed wheel of the pump carrying shaft is pivoted on the closure element in such a manner -~
that upo-n removing the closure element from the circular orifice ~ ;~
of the pump casing, the rotor, the feed wheel, the shaft and the closure element carrying these elements form a unit. When the operator pulls the closure element out of the orifice, shaft, feed wheel and rotor hang on it, and the entire unit can be cleaned under running water, for example, and then be reinserted in the pump casing in one single manipulation. By virtue of the shaft being mounted in the closure element, separate handling of the shaft is not necessary. A cleaning and servicing process can therefore be carried through in a very short time, even by laymen.
Insofar as an additional recess is provided in the rear wall of the pump chamber to support the free end of the shaft, into which recess the shaft can be inserted when returning the closure element into the orifice, an especially stable and vibration-free shaft mounting will result at both shaft-ends. When, according to claim 3, the recess in the pump chamber wall opposite the clo,~,ure element opens funnel-shaped towards the closure element, the insertion operation ef'fected by the operator is eased, a selr-centering ef'fect is obtained, bearing parts mutually impacting during thç insertion operation are protected, bending of the shaft and damage to the bearing edges are prevented;
- 210~359 ~:
,::
..
A rotor safety element is to be arranged at the free end of the shaft, which advantageously can display an apex aligned with the -~
shaft. The rotor safety element is inserted i~to the recess in the wall of the pump chamber during the insertion operation. --'; ,~
By the characteristics of claim 6 it is assured, on the one hand, that the pump will run particularly quietly, and on the other hand, cants of the closure element will not lead to bearing damage and to bending of the bearing shaft during removal and insertion.
The diameter of the rotor is advantageously smaller than the diameter of the feed wheel; the feed wheel can be arranged in a ~ -section-of the pump chamber that is enlarged in compa~ison to the rotor section of the pump chamber, whereby the pump output can be increased.
Advantageously, a cylindrically shaped diaphragm radially surrounding the feed wheel outside can be arranged at the closure element and which has at least one adjusting orifice that can be brought to overlap the outlet orifice. The adjusting orifice can be brought to more or less overlap the outlet orifice from the pump chamber, by which the pump output can be adjusted with particular effectiveness. An especially sensitive control of the pump output is made possible by the characteristics of ciaims 13 and 14.
It is also possible, however, to arrange at the closure element only a control segment that can more or less be brought to overlap the outlet orifice of the pump chamber. When - as provided in claim 16 - the control segment is shaped in the manner o~ a wedge dlaphragm, control can accordingly be effected sensitlvely.
`` 2~3~9 Claim 17 is concerned with a particularly advantageous arrangement of the suction orifice, which is to run between the bottom free ends of the field producing elements of ~he pump~s motor. This makes it possible to run the field producing elements, also called stators, far around the rotor, almost without interruption to the bottom side of the pump, whereby a strong pumping run and start of the pump are assured. The suction orifice is preferably a groove, corresponding approximately to the depth of the pump chamber section holding the rotor of the pump motor.
An adjusting device influencing the suction flow can be arranged in the suction orifice. This makes possible control of the pump output similar to that performed by the wedge diaphragm control in the pump outlet area. Control of the pump output can be done with particular sensitivity when the control slide valve is provided with a shaft drive which has a control button projecting from the pump casing. This is of particular importance because the pump can also be used as an indoor fountain pump, and precisely adjustable and reproducible pump output conditions are particularly important in a room, since it must absolutely be prevented that water be splashed out beyond the area of the indoor fountain.
In smaller pumps it is sufficient that the closure element, which is to hold the rotor shaft, be secured in the casing by means of an O-ring-clamp. In larger dimensioned pumps, however, the internal pressure in the pump chamber rises so much that the o- `~
ring-clamp may possibly no longer be sufficient. It is then particularly advantageous that the closure element be fastened in the casing in the manner o~ a bayonet lock.
It i8 ~urthermore particularly advantageous to attach the pump with its bottom flanged joint to a suction base, which displays a large dimensioned suction plate that can have a diameter ~ 5359 ~:
approximately equal to or even larger than the diameter of the pump casing. In this manner, the pump, which more or less is to serve as carrier for an entire fountain system, can be securely fastened to the bottom of a fountain basin or, for example, to a metal plate embedded in a pool. The suction plate of the suction base can advantageously be provided with a mechanical adjusting device to lift the center of the suction plate, by which a particularly good hold of the suction plate on the substratum can be achieved.
Additional advantageous characteristics of the suction base, in which a filter chamber is incorporated, result from the subsequent claims. -~
: .
The invention is illustrated in more detail by the exemplified embodiments in the drawing figures. These show:
Fig. 1 a longitudinal section through an electrically driven pump for liquids with a cross section through an attachable base part and an attachable liquid conveying element;
Fig. 2 a schematic cross-sectional view through the pump casing with the removed closure element;
Fig. 3 three alternative specific embodiments of the closure element, namely ! Fig. 3a with pump output control and Fig. 3b without pump output control Fig. 4 A longitudinal section through an alternative specific ;;~
embodiment of a pump 219S3S~
Fig. 5 A cross section along V/V in Fig. 4 ig. 6 A cross section through a pump with a suction base attachable to it ig. 7 A cross section through a pump for li~uids with outflow control by means of a wedge diaphragm Reference is first made to Fig. 1. The electrically driven pump 1 for liquids shown there has a pump casing 2 that is provided with a suction orifice 3 and an outlet orifice 4. In the pump casing 2, a pump chamber 5 is arranged connected with the suction and outlet orifices, which at least partially extends between field producing elements arranged in pump casing 2, which are indicated by arrows 6. In the casing area of the fieid producing elements 6, a rotor 7 of an electric motor connected to a feed wheel 8 is pivoted on a bearing shaft 9. In a circular orifice 11 in the casing wall 10 a closure element 12 is attached, which has an outwardly projecting handle 13, by which it can be turned in orifice 11. The inside 14 of the closure element 12 forms a section of the pump chamber wall, the closure element 12 is fastened in orifice 11 with clamp fit by means of an O-ring-seal 15.
The extreme end 20 of shaft 9 is centrally fastened in a recess 21 of the inside 14 of the closure element 12, so that the shaft 9 also turns when the handle 13 is turned towards the pump casing 2. The elements 7 and 8 pivoted on shaft 9 either follow this turning or at least a detaching is assured from these parts of dirt particles that can be found inside the pump chamber 5. By turning the handle 13 towards the pump casing 2, an assist to starting the pump is thus made possible, if the pump should indeed experience starting dlfficulties.
.. .. .... ... .. .. . . .. . .
- 2io53~9 The free end 22 of shaft 9 rests in the final assembly position in a funnel-shaped recess 23 in the wall 24 of.pump chamber 5 holding the rotor 7 opposite to the closure element 12, whereby, upon insertion of the shaft 9 with rotor 7 and feed wheel 8 into the pump casing 2, a centering of the shaft in its desired position takes place. At the free end 22 of shaft 9, a rotor safety element 25 is mounted, which has an apex 26 aligned with shaft 9 and which dips into the funnel-shaped recess 23.
The end 20 of shaft 9 arranged in the closure element 12 rests in an elastic bearing part 30 which is shaped as a rubber or elastic plastic sleeve.
It can furthermore be gathered from figure 1 that the diameter of ~eed wheel 8 is smaller than the diameter of the closure element 12 and that the diameter of rotor 7 is smaller than the diameter of feed wheel 8. The diameter of the section of the pump chamber holding the rotor 7 is smaller than the diameter of the feed wheel 8, which results in an improvement of the pump output.
Drawing 2 shows the parts already described in detail in drawing 1, but with the connected unit of closure element 12 with handle 13, shaft 9, feed wheel 8, rotor 7 and rotor safety element 25 ;
pulled out from pump chamber 5 of pump casing 2. When this subassembly is inserted into the pump casing 2 in the di~ection o~ arrow 35, the apex 26 of the rotor safety element 25 adjoins the correspondingly shaped inside surfaces of recess 23, whereby a fixing of the shaft 9 in its desired operating position is effected.
In the ~ollowing, reference i8 now made to drawings 3a and b.
There, the subassembly made up of closure element 12, shaft 9, rotor 7 and feed wheel 8 is again shown. In the exemplified embodiment shown in Fig. 3a, a cylindrical diaphragm 40 radially ~
surrounding the feed wheel 8 on the outside is arranged at the ~-_ 7 _ ~
closure element 12, which has an adjusting orifice 51 that can be brought to overlap with outlet opening or outlet groove 50, respectively. The adjusting orifice 51 has a long-stretched form narrowing in wedge-shape and runs along the circumference of diaphragm 40. In the exemplified embodiment illustrated it covers a segment area of about 90 of diaphragm 40.
Also indicated in drawing 1 are a pedestal base 60 and a liquid conveying element 61, which can be connected to the pump casing 2 by way of the flanged joints 62, 63.
In the following, reference is made to figures 4 and 5. The pump for liquids 1 shown there with its pump casing 2 differs from the pump shown in Fig. 1 in that the flanged joints 62 and 63 are of sven dimensions, which in principle opens up the possibility of attaching li~uid conveying elements 61 to both the top and bottom of pump 1. ;
., In addition, it clearly results from the sectional drawing according to Fig. 5 that the suction orifice 3 runs between the bottom free ends of the stators 6, i.e., the stators surround rotor 7 to the largest possible extent and leave a slot only at the bottom, in which the suction orifice 3 is arranged. ~-The suction orifice can have different lengths, the maxi~um length o~ the suction orifice 3 can approximately correspond to the depth D (cf. Fig. 4) of the section of pump chamber 5 holding the rotor 7.
I
In suction ori~ice 3, an ad~usting device 70 is arranged, which in~luences the suction ~low and which includes a slide valve 71 that can be inserted in the groove of suction orifice 3 as well as a shaft drive 72, wherein the shaft drive 72 carries a control button 73 projecting from the pump casing 2.
210S3~
In the following reference is made to Fig. 6. It shows below the pump a suction base 80 with a suction plate 81,.the diameter of which approximately corresponds to the diameter of pump casing 2.
The suction base 80 is connected to a mechanical adjusting device in the form of a control lever 83, whereby the center 85 of the suction plate 81 can be lifted and lowered by way of a connecting part 84. In this manner, a concave curvature of the suction plate 81 can be achieved, which assures a strong vacuum and thus ~-a particularly strong hold on the substratum attached by suction.
Inflow orifices 86, connected to the flanged joint 62 of pump casing 2, are provided above the suction plate 81. In the flow area between the inflow orifices 86 and the flanged joint 62, there is a filtering chamber 87 which at least in part is filled ;
with a filtering material 88, for example, a sponge. The ad~sting device, namely the control lever 83, runs across the filtering chamber 87.
In the following, reference is made to Fig. 7 which serves only to again clearly show the position of the wedge diaphragm 90, ;
which is arranged at the closure element 12. As partial figure 7a makes particularly clear, the wedge diaphragm 90 can be brought in front of the outlet orifice 4 by turning and exercises, depending on its turning position in relation to the outlet orifice 4 and by virtue of its wedge shape, a more or less strong blocking action which has an effect on the pump output.
Claims (29)
1. Electrically driven pump for liquids (1), - with a pump casing (2) -- that is provided with a suction orifice (3) and -- with an outlet orifice (4), -- in which a pump chamber (5) is arranged, which is connected with the suction and outlet orifice, and which in part extends between field producing elements (6) arranged in the pump casing (2) and in which a rotor (7) of an electric motor connected to a feed wheel (8) is arranged pivoted on a bearing shaft (9), as well as - with a closure element (12) which -- is arranged pivoted in a circular orifice (11) of the pump casing (2) and -- forms a wall of the pump chamber (5), characterized in that - the shaft (9) carrying the rotor (7) of the electric motor as well as the feed wheel (8) of the pump is pivoted in the closure element (12) in such a manner that upon removing the closure element (12) from the circular orifice (11) of the pump casing (2), the rotor (7), the feed wheel (8), the shaft (9) and the closure element (12) carrying these elements form a cohesive unit.
2. Pump according to claim 1, characterized in that the free end (22) of the shaft (9) fits into a recess (23) in the wall of pump chamber (5) holding the rotor (7), opposite the closure element (12).
3. Pump according to claim 2, characterized in that the recess (23) opens funnel-shaped towards the closure element (12) in such a manner that the free end (22) of the shaft (9) is centered in its desired position when the shaft (9) with rotor (7) and feed wheel (8) is inserted into the casing (2).
4. Pump according to one of the preceding claims, characterized in that a rotor safety element (25) is arranged at the free end (22) of the shaft (9).
5. Pump according to one of the preceding claims, characterized in that the rotor safety element (25) has an apex (26) aligned with the shaft (9).
6. Pump according to one of the preceding claims, characterized in that the end (20) of shaft (9) arranged in the closure element (12) rests in an elastic bearing part (30).
7. Pump according to one of the preceding claims, characterized in that the elastic bearing part (30) is designed as a rubber/plastic sleeve.
8. Pump according to one of the preceding claims, characterized in that the closure element (12) is clamped into the circular casing recess (11) by means of an O-ring seal (15).
9. Pump according to one of the preceding claims, characterized in that the diameter of the feed wheel (8) is smaller than the diameter of the closure element (12).
10. Pump according to one of the preceding claims, characterized in that the diameter of the rotor (7) is smaller than the diameter of the feed wheel (8).
11. Pump according to one of the preceding claims, characterized in that the diameter of the section of the pump chamber (5) holding the rotor (7) is smaller than the diameter of the feed wheel (8).
12. Pump according to one of the preceding claims, characterized in that at the closure element (12) there is arranged a diaphragm (40) with a cylindrical shape radially surrounding feed wheel (8) on the outside and which has an adjusting orifice (51) that can be brought to overlap the outlet orifice or an outlet (50), respectively.
13. Pump according to one of the preceding claims, characterized in that the adjusting orifice (51) has a long-stretched wedgelike narrowing form and runs along the circumference of the diaphragm (40).
14. Pump according to one of the preceding claims, characterized in that the adjusting orifice (51) approximately covers a segment area of 90° of the diaphragm (49).
15. Pump according to one of claims 1-11, characterized in that at the closure element (12) there is arranged a control segment (90) radially outwardly surrounding the feed wheel (8).
16. Pump according to claim 15, characterized in that the control segment (90) is shaped in the manner of a continually rising and again declining wedge diaphragm.
17. Electrically driven pump for liquids with the characteristics of the introductory part of claim 1, characterized in that the suction orifice (3) runs between the bottom free ends of the field producing elements (stators (6)).
18. Pump according to claim 17, characterized in that the suction orifice (3) is shaped as a groove.
19. Pump according to claim 18, characterized in that the length of the suction orifice (3) shaped as a groove corresponds approximately to the depth D of the section of the pump chamber (5) holding the rotor (7).
20. Pump according to one of the preceding claims, characterized in that an adjusting device (70) influencing the inflow is arranged in the suction orifice (3).
21. Pump according to claim 20, characterized in that the adjusting device (70) is shaped as a slide valve (71) insertable longitudinally in the groove of suction orifice (3).
22. Pump according to claim 21, characterized in that the slide valve (71) is provided with a shaft drive (72) which displays a control button (73) projecting out from the pump casing (2).
23. Pump according to one of the preceding claims, characterized in that the diameter of the suction-side flanged joint (62) corresponds to the diameter of the outlet-side flanged joint (63).
24. Pump according to claim 1, characterized in that the closure element (12) is provided with form closure elements of the bayonet lock type, which can be forced into engagement with counter-elements at the casing (2).
25. Closure element according to one of the preceding claims, characterized in that the pump (1) with its flanged joint (62) is attachable to a suction base (80), the suction plate (81) of which has a diameter that is approximately the same or larger than the diameter of the pump casing (2).
26. Pump according to claim 25, characterized in that the suction plate (81) of the suction base (80) is connected with a mechanical adjusting device (83) for lifting the center (85) of the suction plate (81).
27. Pump according to claim 26, characterized in that above the suction plate (81) at least one inlet port (86) is arranged, which can be connected to the flanged joint (62).
28. Pump according to claim 27, characterized in that in the flow area between at least one inlet port (86) and flanged joint (62) a filter chamber (87) is arranged, which is filled at least in part with a filtering material (88).
29. Pump according to claim 28, characterized in that the adjusting device (83) is arranged inside the filter chamber (87).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4304945.1 | 1993-02-19 | ||
| DE19934304945 DE4304945A1 (en) | 1993-02-19 | 1993-02-19 | Electrically driven liquid pump |
| EP93106943A EP0618370A3 (en) | 1993-02-19 | 1993-04-29 | Electrically driven liquid pump. |
| EP93106943.9 | 1993-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2105359A1 true CA2105359A1 (en) | 1994-08-20 |
Family
ID=25923194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2105359 Abandoned CA2105359A1 (en) | 1993-02-19 | 1993-09-01 | Electrically driven pump for liquids |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2105359A1 (en) |
| CZ (1) | CZ155293A3 (en) |
-
1993
- 1993-07-30 CZ CZ931552A patent/CZ155293A3/en unknown
- 1993-09-01 CA CA 2105359 patent/CA2105359A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CZ155293A3 (en) | 1995-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |