Patent Application
20250155311
The disclosure relates to a method for reducing an unbalance of a rotational component for an electric pump, a balancing machine, a computer program, and a computer-readable medium.
Damage can occur on pumps due to an unbalance of a rotational component. Such an unbalance can also result in acoustic disturbances. It is therefore of great importance to reduce the unbalance.
Documents DE 10 2014 103 060 A1 and EP 0 922 208 A1 relate to a method and a device for balancing rotors.
The devices in the prior art in particular have the disadvantage of the long duration of a balancing process.
It is an object of one aspect of the present invention to provide an alternative method for reducing an unbalance of a rotational component for an electric pump, which is distinguished in particular by its short duration. A further object is to provide a balancing machine which is configured to carry out this method. A further object is to provide a computer program for carrying out the method. A further object is to provide a computer-readable medium having the computer program. A further object is to provide a rotational component for the method according to the invention.
An exemplary aspect of the invention relates to a method for reducing an unbalance of a rotational component for an electric pump, comprising:
In this way, a method is provided which is distinguished from the method in the prior art by its extremely short duration. This is above all because the individual material removals are determined in their required number and their required material removal variable before the material removal begins.
Preferably, the individual material removals and/or the material removal form recesses in the form of circle segments or ring segments on the rotational component.
It is particularly advantageous if the laser radiation comprises at least one laser beam. The laser radiation or the laser beam is preferably generated by a laser source, such as a laser diode.
It is also advantageous if the unbalance of the rotational component is determined by a balancing machine. The balancing machine preferably has a separately provided sensor for this purpose. For example, the unbalance is determined by setting the rotational component into rotation and measuring a radial force occurring due to the unbalance by the sensor, from which the unbalance can be concluded.
The statement that the unbalance corresponds to at least one threshold value variable is preferably to be understood such that a or the variable of the unbalance at least corresponds to the threshold value variable.
Furthermore, it is preferred if the determination of the number of individual material removals and their material removal variables takes place before the reduction, which is associated therewith in particular, of the unbalance.
It is particularly advantageous if an algorithm and/or an artificial intelligence is used for the determination of the number of individual material removals and their material removal variables. This method step can be automated thereby.
Furthermore, it is advantageous if the number of individual material removals and their material removal variables are determined on the basis of preceding balancing profile data.
The method steps which do not require specific devices to be carried out are preferably computer-implemented method steps.
In general, it is preferred if a or the unbalance reducing variable or the unbalancing reducing variables is or are to be understood as a variable which represents a measure for the reduction of the unbalance. In other words, the unbalance is reduced more strongly the greater a or the unbalance reducing variable is or the unbalance reducing variables are.
In addition, it is expedient if the rotational component for the electric pump is a rotor or a pump impeller. In addition, it is expedient if the rotational component of the electric pump is a rotor-pump impeller unit. Independently of how the rotational component is designed, it is preferred in principle if the rotational component comprises plastic or at least partially consists of plastic. It is particularly preferred if the rotational component comprises plastic at the points at which the material removal is performed or that the rotational component consists of plastic at least at these points. The plastic is preferably a plastic that is matched to the laser radiation or the at least one laser beam, in particular in such a way that the laser radiation or the at least one laser beam generates or performs a material removal upon striking the plastic. Alternatively, it is conceivable that the rotational component consists of brass, for which a higher application of energy is necessary for the individual material removal and/or the laser and/or the laser beam, however, than in the case of a rotational component made of plastic.
The rotational component is preferably designed in such a way that it comprises a material accumulation and/or material accumulations, in particular made of plastic or brass, which are designed and/or provided to enable the reduction of the unbalance by the material removal on the rotational component. In other words, special points are provided on the rotational component, at which the material removal and/or the individual material removals can be performed to reduce the unbalance.
One preferred exemplary aspect is characterized in that the individual material removals take place at least partially simultaneously or in succession.
Additional time can be saved with simultaneous individual material removals. Multiple individual material removals are preferably each carried out by at least one laser beam in this case. The laser source preferably comprises for this purpose one laser diode per individual material removal, which are carried out simultaneously.
In the case that the laser source is only capable of generating a single laser beam, it is advantageous if no further determination of the unbalance of the rotational component takes place between the successively occurring individual material removals. Time is saved in this way. The goal is to reduce the time required to achieve falling below the threshold value variable, which is avoided by omitting intermediate measurements to determine the remaining unbalance after each completed individual material removal.
A further preferred exemplary embodiment is characterized in that after the reduction of the unbalance, the resulting unbalance of the rotational component is ascertained, wherein the method is repeated if, after the reduction of the unbalance, the resulting unbalance of the rotational component at least corresponds to the threshold value variable, and/or the method is ended if, after the reduction of the unbalance, the resulting unbalance of the rotational component is below the threshold value variable.
It is ensured by the repetition of the method that the unbalance is reduced such that it is below the threshold value variable.
Time is saved by ending the method when it is established that the unbalance has already been reduced to a variable which meets the demands of the rotational component in its area of use.
A further preferred exemplary embodiment is characterized in that the method furthermore comprises the following:
Due to the correction of the standardized material removal variables, the accuracy of the method is increased or the device using which the method is carried out is automatically readjusted.
It is particularly advantageous if an algorithm and/or an artificial intelligence is used for the evaluation of the deviation between the resulting unbalance of the rotational component after the material removal and the variable which results from the unbalance minus the unbalance reduction variables of the executed individual material removals, which result from the material removal. This method step can thereby be automated.
Furthermore, it is advantageous if the correction and/or evaluation is carried out on the basis of preceding balancing profile data.
A further preferred exemplary aspect is characterized in that the material removal variables differ from one another in their form and/or in their distance to the axis of rotation of the rotational component and/or in their dimensioning.
It is therefore possible to deal with differently designed rotational component variants.
A further preferred exemplary aspect is characterized in that the determination of the required number of individual material removals and/or the material removal variables is carried out in dependence on the material removal duration and/or the difference between the unbalance and the threshold value variable, thus in particular the intended reduction of the unbalance.
If the requirements are to ensure the least possible unbalance, for example, a higher number of individual material removals having different standardized material removal variables will very probably be necessary. The number and the standardized material removal variables are selected such that the unbalance successively approaches zero after each individual material removal, thus is successively reduced and is approximately eliminated. For this purpose, it is expedient if a smaller standardized material removal variable than before is selected with each further individual material removal. In this way, a particularly high, thus rapid reduction of the unbalance takes place at the beginning of the material removal, while the most accurate possible reduction of the unbalance takes place towards the end with decreasing material removal variable. Such a procedure results in an extremely small unbalance at the cost of the material removal duration. The higher the number of individual material removals and/or the smaller the material removal variables are in relation to the difference between the unbalance and the threshold value variable, the longer the reduction of the unbalance to a variable below the threshold value variable takes. In other words, the greater is the material removal duration. It is therefore very particularly preferred if material removal variables are selected which reduce the material removal duration. This is preferably achieved in that material removal variables are determined or selected which are as large as possible in relation to the difference between the unbalance and the threshold value variable and at the same time are smaller than the unbalance. In other words, due to the determination of the material removal variables, the number of individual material removals are minimized such that the material removal duration is minimized and it is ensured at the same time that the unbalance after the material removal corresponds to a variable below the threshold value variable
It is preferred in principle if the individual material removal variables are graduated in their size in relation to one another. In principle, it is expedient if the individual material removal variables are predetermined. Furthermore, it is preferred if the gradation to the next larger material removal variable is at least 5%, 10%, 15%, 20%, 30%, 40%, or 50%.
The object with respect to the balancing machine is achieved by a balancing machine configured to carry out the method according to the invention. The balancing machine preferably comprises sensors to ascertain the unbalance. Furthermore, it is expedient if the balancing machine has a laser source, which in particular comprises a laser diode or multiple laser diodes, wherein laser radiation or laser beams can be generated by the laser source or the laser diode or the multiple laser diodes. In addition, it is expedient for the balancing machine to comprise a control unit, which is configured to operate the balancing machine. In addition, it is expedient if the control unit is configured to evaluate sensor signals ascertained by the sensors. Furthermore, it is advantageous if the control unit is capable of operating the laser source or the laser diode or the multiple laser diodes. In addition, it is advantageous if the control unit is configured to operate the balancing machine in such a way that the balancing machine carries out the method according to the invention.
A balancing machine is provided in this way which enables a balancing method that is as short as possible with respect to the duration.
The object with respect to the computer program is achieved by a computer program which comprises commands that cause the balancing machine to carry out the method steps of the method according to the invention. Such a computer program can be executed, for example, by the control unit of the balancing machine.
The object with respect to the computer-readable medium is achieved by a computer-readable medium on which the computer program according to the invention is stored. The computer-readable medium is preferably a nonvolatile and/or non-transitory memory. The computer-readable medium or the nonvolatile memory is preferably comprised by the control unit.
The object with respect to the rotational component is achieved in that a rotational component for the method according to the invention is provided. The rotational component is preferably designed in such a way that it comprises a material accumulation and/or material accumulations, in particular made of plastic or brass, which are designed and/or provided to enable the reduction of the unbalance by means of the material removal on the rotational component. In other words, special points are provided on the rotational component, at which the material removal and/or the individual material removals can be performed to reduce the unbalance. In accordance with the statements on the method, the rotational component can include different types of rotational components, such as pump impellers or rotors for pumps. These material accumulations are preferably formed as circles or rings, by which removals in the form of ring segments or circle segments are enabled. In this way, enough material is retained at the required points in order to reduce an unbalance by means of the method according to the invention.
Advantageous developments of the present invention are described in the dependent claims and in the following description of the figures.
The invention is explained in more detail hereinafter on the basis of exemplary embodiments with reference to the drawings. In the drawings:
The different features of the individual exemplary embodiments can also be combined with one another.
The exemplary embodiments of
Thus while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred aspect thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2023 211 339.2 | Nov 2023 | DE | national |
