WO2016119775A1 - Exzenterschneckenpumpe mit einem automatischen verstellsystem und einstellverfahren - Google Patents
Exzenterschneckenpumpe mit einem automatischen verstellsystem und einstellverfahren Download PDFInfo
- Publication number
- WO2016119775A1 WO2016119775A1 PCT/DE2016/000033 DE2016000033W WO2016119775A1 WO 2016119775 A1 WO2016119775 A1 WO 2016119775A1 DE 2016000033 W DE2016000033 W DE 2016000033W WO 2016119775 A1 WO2016119775 A1 WO 2016119775A1
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- WIPO (PCT)
- Prior art keywords
- stator
- adjusting
- eccentric screw
- screw pump
- operating parameters
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/811—Actuator for control, e.g. pneumatic, hydraulic, electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/17—Tolerance; Play; Gap
- F04C2270/175—Controlled or regulated
Definitions
- the present invention relates to an eccentric screw pump and a
- the present invention relates to an eccentric screw pump for conveying liquid and / or granular media.
- Eccentric screw pumps are pumps for pumping a large number of media, in particular viscous, highly viscous and abrasive media such as sludges, liquid manure, crude oil and fats.
- the driven, coiled rotor rolls in the stator.
- This is a housing with a spiral-shaped inside.
- the rotor performs with its figure axis an eccentric rotation about the stator.
- the outer screw, i. the stator has the form of a double thread, while the rotor screw is only catchy.
- the rotor is usually made of a highly abrasion-resistant material, such as steel.
- the stator however, consists of an elastic material, for example rubber. Due to the special shape of rotor and stator between the rotor and stator sealed cavities, which move axially upon rotation of the rotor and promote the medium. The volume of the cavities is constant, so that the fluid is not crushed. With suitable interpretation can with suitable interpretation can with
- the rotor is pressurized to an inner wall of the stator formed by elastic material. Due to the movement of the usually metallic rotor within the usually made of rubber or a similar material stator there is a certain abrasion or wear of the stator. Due to the wear, the pressurized contact force between the rotor and stator is reduced, in particular, the contact between the stator and the rotor along a continuous helical contact line are not maintained, whereby the performance of the eccentric screw pump decreases. This is especially true for progressing cavity pumps, which have to overcome a large suction height or a high back pressure. For this reason, the stator must be replaced and replaced at regular intervals.
- sensors are used, which detect the wear of the stator based on physical parameters.
- DE 10157143 A1 describes an indication of maintenance intervals or residual service lives of progressing cavity pumps.
- the sensors detect wear-relevant operating parameters that are detected by a control unit. Based on these parameters, the control unit determines an expected value of the operating time or of operating cycles up to the due date of the next maintenance or the replacement of specific parts.
- DE 202005008989 discloses an eccentric screw pump with a monitoring of the functionality and wear of the stator, wherein the stator is associated with at least one sensor with which compressions and / or movements of the stator or the elastic material in the course of the rotation of the rotor can be measured.
- DE 3433269 A1 describes a stator jacket with tensioning devices in the form of tension bolts, which are distributed over the entire axial length of the stator shell. This causes a significant increase in weight of the stator-rotor system. In addition, all clamping devices must be tightened individually to readjust.
- EP 0292594 A1 discloses a stator jacket provided with a longitudinal slot for progressing cavity pumps, which has an exclusively in its pressure range
- the tension is partially distributed over the length of the stator shell by suitable reinforcing ribs.
- DE 4312123 A1 describes a stator jacket with a plurality of longitudinal slots, which simplify readjustment. So that an adjustment can be made better in the region of the pressure-side end of the stator, the slots end shortly before the end of the suction end of the stator and run free only at the pressure end.
- DE 4403979 A1 discloses an adjustable stator for
- Eccentric screw pumps with continuous longitudinal slots and longitudinal slots, which end at a short distance in front of the suction end of the stator.
- a longitudinal slot is followed by a continuous slot.
- the object of the invention is to achieve a simple and quick adaptation of a stator-rotor system to the operating conditions.
- the invention relates to an eccentric screw pump with stator-rotor system.
- the stator-rotor system comprises a rotor with a rotor screw and a stator.
- the stator-rotor system comprises a rotor with a single-start rotor worm and a stator with a double-start internal thread.
- the stator is constructed at least in two parts and comprises a support element and an elastomer part.
- the elastomer part of the stator is arranged in a stator jacket and generally has no fixed connection to the stator jacket. Instead of a stator jacket, it is also possible for a fabric part or an elastomer part to comprise at least in some areas
- Grid structure can be used as a support element. That is, the support element or the stator shell and the elastomer part are usually formed as separate parts.
- the support element or the stator jacket surrounds the elastomer part at least partially full extent. In particular, the support element or the stator jacket surrounds the majority of the elastomer part, so that only the free outer end regions of the elastomer part via the support element
- the stator is a stator system as described in DE 102005042559 A1. Due to a lack of a firm connection between the elastomer part and the support element or stator jacket, an axial deformation of the elastomer part is possible. When deformed, the volume of the stator remains the same. This results in an axial deformation of the elastomeric part at the same time to a cross-sectional change of the elongated hole of the elastomeric part, in which the rotor is guided.
- the bias voltage that is, the contact force between the stator and rotor
- the adjustment or setting of the stator can also be used to adjust the bias between stator and rotor of a progressing cavity pump to different operating conditions
- the stator-rotor system of the eccentric screw pump has a
- Adjustment mechanism for varying and adjusting the bias of the stator. Depending on the operating state of the eccentric screw pump, a different bias of the stator-rotor system is necessary.
- the bias voltage is dependent, for example, on the viscosity of the conveyed product, product mixture or the like.
- Operating state is in particular by means of different operating parameters, such as pressure. Speed, torque and / or other operating parameters determined.
- the adjustment mechanism is coupled to a control system and is controlled and controlled by this.
- the control system comprises at least one sensor for determining actual operating parameters of the stator-rotor system and / or the eccentric screw pump and a controller for setting the
- Adjustment mechanism That is, the adjustment mechanism is coupled via a controller with at least one sensor for determining actual operating parameters of the stator-rotor system and / or the eccentric screw pump.
- the control of the adjusting mechanism takes place taking into account the determined by at least one sensor actual operating parameters by the controller.
- the control mechanism provides a relationship between various physical parameters of the stator-rotor system and the stator-rotor system
- Wear state of the stator or the bias voltage between stator and rotor ago For example, a relationship between the physical parameters pressure, torque, flow, speed and / or viscosity and the state of wear of the stator or the bias voltage between the stator and rotor is made.
- the most direct parameter that unites these relationships is the stress state in the elastomer material. This can either be directly via a appropriate sensors are determined in the elastomeric material, or indirectly determined by the reaction forces of the elastomer to other components, for example, via the reaction forces of the elastomer on the stator, in particular the
- a correlation is produced, for example, from pressure, torque, flow rate, rotational speed and the existing preload in the elastomer and then a corresponding adjustment position for adjustment of the adjustment mechanism is determined which should be suitable for setting the optimum operating point.
- the physical operating parameters of the eccentric screw pump are measured again and it is determined whether the optimum operating state has been reached. If the measured operating parameters do not correspond to the desired setpoint parameters, an adjustment path is again calculated and the adjustment mechanism is set accordingly.
- the actual control parameter is the stress state prevailing in the elastomer, which is measured, for example, in an indirect form and in combination with others
- the adjustment of the calculated adjustment path x and / or the adjustment direction takes place with an incremental approach. In particular, therefore, a gradual approach to the optimal adjustment of the adjustment takes place. With a setpoint actual deviation outside a specified tolerance, the
- Adjusting mechanism adjusted by a specified amount.
- the control algorithm according to the invention defines, on the basis of the desired-actual comparison and within the
- the adjusting mechanism comprises two adjusting elements arranged on the stator-rotor system, which are distance-variable relative to one another. In a first working position, the two adjusting elements at a first distance from each other and in a second working position, the two adjusting elements at a second distance from each other, wherein the first distance is not equal to the second distance. In the second operating position, the cross section and the length of the elastomeric part of the stator are changed relative to the cross section and the length of the elastomeric part in the first working position.
- Elastomer part of the stator By changing the relative distance between the two adjusting elements of the adjusting mechanism, a change of the cross section and the length of the elastomer part of the stator is effected.
- one of the adjusting elements is fixed on the stator
- Rotor system is arranged and the other adjusting element is arranged positionally variable on the stator-rotor system.
- the first adjusting element is fixedly arranged on the supporting element or the stator jacket and the second adjusting element is arranged in a positionally variable manner on the elastomeric part of the stator.
- the first adjusting element is fixedly arranged on a flange at a free end of the supporting element or stator jacket and the second position-variable adjusting element is arranged at a free end of the elastomeric part of the stator.
- an actuator is actuated by the controller, which effects a repositioning of the second position-variable adjusting element and thus causes a change in the relative distance between the second position-variable adjusting element and the first stationary adjusting element.
- the adjustment of the relative distance between the two adjusting elements can be done in different ways.
- actuators for example
- Wedge elements, wedge rings, mechanisms with spindle adjustment, cylinder assisted mechanisms etcetera serve.
- at least one second sensor may be arranged on the stator-rotor system, in particular on the elastomer part of the stator.
- at least one third sensor can be arranged on the adjusting mechanism.
- the at least one first sensor for measuring the pressure, the rotational speed, torque, the temperature and / or the volumetric flow is
- the second sensor may be, for example, a piezoelectric element, a load cell or a dielectric elastomer.
- the second sensor can also be designed such that it can be used to measure the reaction forces of the elastomer material, while the at least one third sensor measures the position of the second position-variable adjustment element and / or for measuring the relative distance between the first stationary adjustment element and the second position variable Adjustment can be formed.
- the invention further relates to a method for adjusting the operating state of an eccentric screw pump with a stator-rotor system described above.
- Adjustment mechanism determined. Subsequently, the sensory determined actual operating parameters are compared with known or desired desired operating parameters. The comparison is made in particular on the basis of data stored in the controller. If a deviation between the actual operating parameters and the desired operating parameters is determined during the comparison, the adjustment mechanism for adjusting the stator is actuated. The setting of the new operating state is thereby by means of a control at least one
- stator leads, in particular to a change in the cross section and the length of the elastomeric part of the stator.
- the operating state is set by an incremental approach to an ideal operating point.
- the control principle or control algorithm is based on the following operating principle: A volumetric flow is assigned to a first rotational speed of an eccentric screw pump. In particular, this would be at a 100% volumetric efficiency of
- Volumetric flow be exactly the volume that is conveyed by the individual conveyor elements (delivery chambers) according to the speed from the suction side to the pressure side of the eccentric screw pump.
- Eccentric screw pump only when an operating point is reached in which increasingly backflow due to the reduced bias occurs, the efficiency of the eccentric screw pump decreases.
- the point of highest efficiency can be clearly described as follows:
- the ideal operating point of the pump is exactly where there is just so much bias between the rotor and stator, so that there is no or little backflow.
- the ideal operating point is therefore the point in which in the rotor-stator system just as much bias is generated as is necessary in order to generate the necessary back pressure with the lowest possible backflow of the medium.
- This operation is used for the control algorithm, in particular, an incremental approach takes place to set the ideal operating state.
- an incremental approach takes place to set the ideal operating state.
- one embodiment of the invention uses the
- Control algorithm preferably the measuring principle described below: First Certain operating parameters of the eccentric screw pump are detected.
- a measurement of the pressure, the rotational speed, the torque (motor current) or other operating parameters by means of suitable sensors.
- the volume flow can be detected by means of a volumetric flow meter, a metering or similar.
- the adjustment mechanism moves to an at least substantially closed position, e.g. in which the two adjusting elements are at most approximated each other.
- the rubber of the elastomeric part is compressed, so that the bias in the stator-rotor system increases-and thereby a backflow is minimized.
- the adjustment mechanism is slowly and controlled reopened.
- the volume flow initially remains largely constant up to a certain point. At a certain point, the volumetric flow breaks down as the backflow in the stator-rotor system increases.
- the ideal operating point is just before this break-in point. The ideal operating point can also be seen as a particular area where the progressing cavity pump shows its best efficiency.
- the adjustment of the bias voltage at certain time intervals is independent by the adjustment system within the rotor-stator system
- the bias of the rotor-stator system increases until a maximum of the volume flow is reached. Upon reaching a maximum of
- Adjustment of the adjusting mechanism after a defined period of time a renewed query of the actual operating state of the eccentric screw pump and comparison with the desired operating parameters. The success of the adjustment is controlled. Consists Furthermore, a deviation between the actual operating parameters and the desired operating parameters of the eccentric screw pump, in particular a deviation outside of a specified tolerance range, a renewed activation and adjustment of the adjustment mechanism.
- a deviation between the actual operating parameters and the desired operating parameters of the eccentric screw pump in particular a deviation outside of a specified tolerance range, a renewed activation and adjustment of the adjustment mechanism.
- Adjustment mechanism and thus adjustment or adjustment of the stator the deviation between the actual operating parameters and the desired operating parameters are sufficiently reduced, so there is no further adjustment. Instead, the set operating state of the eccentric screw pump is checked again after a defined period of time by previously described sensory measurements. If, however, at the first query of the actual operating state of
- Eccentric screw pump no deviation between the actual operating parameters and the desired operating parameters determined, in particular no deviation outside the specified tolerance range, so after a defined period of time a renewed query of the actual operating state of the eccentric screw pump by measuring the actual operating parameters and in turn a comparison of the same the desired operating parameters.
- Regular polling at defined intervals ensures that the stator-rotor system is constantly monitored during operation.
- the pressure is sensory
- Eccentric screw pump determined.
- the bias voltage between the rotor and stator and / or the reaction forces of the elastomeric material of the elastomeric part are measured.
- the position of at least one adjusting element of the adjusting mechanism and / or the relative distance between two adjusting elements of the adjusting mechanism can be sensed.
- the adjusting mechanism comprises two distance-variable adjusting elements
- Adjustment mechanism by increasing or decreasing the relative distance between the two adjustment elements. The change in distance between the two
- Adjusting elements causes a change in the cross section and the length of the coupled elastomer part of the stator-rotor system. This calculates the
- Regulating mechanism based on sensory physical parameters of the stator-rotor system a desired distance between the two adjusting elements and calculates in particular the adjustment of the second position variable adjustment. Subsequently, the adjusting mechanism is activated and the calculated position of the second position-variable adjusting element is set, in particular thereby the calculated distance between the two
- the new operating state of the eccentric screw pump can be further approximated to the desired optimum operating state. Is the deviation from
- the invention thus relates to a stator-rotor system for an eccentric screw pump and to a control of such
- the invention particularly relates to an automatic control system for
- Eccentric screw pump that is, between a soft component - the
- Eccentric screw pump can be operated at any time at the optimum operating point, resulting in a significant increase in the energy efficiency of the stator-rotor system.
- the automatic control of the bias leads in particular to an automatic wear compensation, so that a stator can be used longer. Through a fixed procedure when switching on and / or off the breakaway torque can be reduced by adjusting the stator.
- the bias voltage between stator and rotor can be advantageously adapted to the viscosity of the pumped medium.
- the method may alternatively or in addition to the features described one or more features and / or properties of the previously described
- Device include. Likewise, the device may alternatively or additionally comprise one or more features and / or properties of the described method.
- Figurenbeschreibunq
- Figure 1 shows a schematic partial view of a known stator-rotor system (prior art).
- Figure 2 shows a schematic partial view of a first embodiment of an inventive stator-rotor system with adjusting mechanism.
- Figure 3 shows schematically a sequence of a control mechanism for adjusting the stator-rotor system.
- FIG. 4 illustrates the ideal operating point as a function of an adjustment path of the adjusting mechanism. Identical or identical elements of the invention become identical
- FIG. 1 shows a schematic partial view of a known stator-rotor system 1 for an eccentric screw pump.
- a system 1 comprises a generally metallic, single-flight coiled rotor (not shown) and a stator 3 with a double-threaded thread.
- the rotor performs with its figure axis an eccentric rotation about the
- the stator 3 comprises an elastomer part 4 and a stator shell 5, wherein there is no firm connection between the elastomer part 4 and the stator shell 5.
- Figure 2 shows a schematic partial view of a first embodiment of an inventive stator-rotor system 10 with adjusting mechanism 12 for
- the adjusting mechanism 12 comprises a first fixed adjusting element 13 and a second position variable Adjustment element 14.
- a change in the distance of the two adjusting elements 13, 14 causes a deformation of the elastomer and thus a change in the cross section and / or the length of the elastomeric part 4 of the stator 3 and thus readjusting or adjusting the elastomeric part 4 of the stator 3.
- a Flange 23 on the stator shell 5 as a fixed adjusting element 13
- an actuating element 24 arranged at the free end 8 of the elastomer part 4 serves as a position-variable adjusting element 14.
- the adjusting mechanism 12 is coupled to the control system 30 and is controlled and controlled by this.
- the control system 30 includes a controller 32 and at least one sensor 35 for measuring physical operating parameters of the stator-rotor system 10 and the eccentric screw pump.
- At least one first sensor 36 is provided on the eccentric screw pump for measuring the pump pressure, the rotational speed, the temperature and / or the volumetric flow.
- at least one second sensor 37 may be arranged on the elastomer part 4, which determines, for example, the bias voltage between rotor and stator 3 or reaction forces of the elastomer material.
- at least one third sensor 38 may be provided on the adjusting mechanism 12, for example the position of the position-variable adjusting element 14 or the relative distance between the fixed adjusting element 13 and the position variable
- the sensor-determined data are transmitted to the controller 32, which compares them with desired operating parameters and, in the event of a deviation between the measured actual operating parameters and the desired operating parameters, actuates a corresponding adjustment of the adjusting system 12, in particular an adjustment in which the relative distance between the fixed adjusting member 13 and the position variable adjusting member 14 is changed, whereby a deformation of the elastomer and thus a change in the cross section and / or the length of the elastomeric part 4 of the stator 3 is effected.
- FIG. 3 schematically shows a sequence of a regulating mechanism for setting the stator-rotor system 10 according to FIG. 2.
- Control mechanism provides a relationship between various physical operating parameters of the stator-rotor system 10 and the
- Elastomeric material This can either be determined directly via a corresponding sensor 37 in the elastomeric material, or indirectly via the reaction force of the elastomer on other components, for example on the stator, in particular the
- Statormantel 5 or the end face of the elastomeric part 4, on closure elements of the stator 5, on the rotor of the stator-rotor system 10 etcetera.
- measurable parameters can be used on the eccentric screw pump, for example the pump pressure, the rotational speed with which the eccentric screw pump is operated, the temperature, the volume flow of the pumped medium, etcetera.
- a correlation is produced, for example, from pressure, flow rate, rotational speed and the required preload and then a corresponding adjustment path for setting the
- Adjustment mechanism 12 which should be suitable to set the optimum operating point.
- sensors 38 may be provided which determine the actual state of the adjustment system, in particular the position of the position variable
- Adjustment 14 or the relative distance between the fixed adjustment member 13 and the position-variable adjustment member 14 and / or sensors 38, which monitor the adjustment of the desired position desired upon adjustment of the position of the position-variable adjustment member 14.
- the sensory operating parameters provide information about the operating state of the eccentric screw pump.
- the operating parameters are compared by the controller 32 (see FIG. 2) with defined operating parameters, which are stored, for example, in a map or in a table in the controller 32. If there is no deviation between the actual operating parameters and the setpoint operating parameters, the system does not react. Instead, the actual operating parameters are measured again after a time interval At1 and subjected to a comparison, so that a regular monitoring or control of the operating state of the eccentric screw pump or of the stator-rotor system 10 takes place.
- the controller 32 determines on the basis of a stored map or a stored table, the necessary adjustment of the adjustment mechanism 12 and controls this accordingly.
- the physical operating parameters of the eccentric screw pump or of the stator-rotor system 10 are measured again after a further time interval At2 and, in turn, it is determined whether the optimum operating state has been reached or maintained. If the measured operating parameters do not correspond to the desired setpoint operating parameters, an adjustment path is again calculated by the controller 32 and the adjusting mechanism 12 adjusted accordingly. In particular, an incremental adjustment is made by a control algorithm, as described below in
- FIG. 4 illustrates the setting of an ideal operating point as a function of an adjustment path n of the adjusting mechanism.
- a specific rotational speed Q of a given rotational speed of an eccentric screw pump is assigned.
- the volume flow Q would be exactly the volume that passes through the individual conveying elements (delivery chambers) in accordance with the rotational speed from the suction side to the pressure side of the
- the progressing cavity pump now takes place as follows: If the volume flow Q is considered at a constant rotational speed over a certain adjustment path n of the adjusting mechanism, it can be established that the volume flow Q is almost constant over a longer adjustment path n. However, the necessary torque (not shown in the diagram of FIG. 4) is not constant. If the bias voltage is released by adjusting and / or repositioning the adjustment elements of the adjustment mechanism, the torque decreases due to the lower friction losses due to the lower preload. In a generally big one
- Operating point iBP of the eccentric screw pump is located exactly in the range of the adjustment path n of the adjusting mechanism, in which just enough preload between the rotor and the stator is present, that there is no or largely no backflow.
- the ideal operating point iBP is thus the point in which just enough bias is generated in the rotor-stator system as is necessary to produce the necessary back pressure without backflow of the medium.
- control algorithm uses the following measurement principle:
- pressure, speed, torque (motor current), optionally detecting the flow rate Q wherein the measurement is carried out for example by means of a volumetric flow meter, a metering or similar
- the adjustment moves.
- the return flow 0 or substantially 0.
- the range of sufficient compression can, for example, based on the Measured values for the volume flow Q can be determined.
- the volume flow Q increases. If this no longer changes or if the volume flow Q drops slightly, the maximum is exceeded.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16708338.5A EP3250829B1 (de) | 2015-01-29 | 2016-01-29 | Exzenterschneckenpumpe mit einem automatischen verstellsystem und einstellverfahren |
CN201680007394.0A CN107208630A (zh) | 2015-01-29 | 2016-01-29 | 具有自动调节系统的偏心螺杆泵以及调设方法 |
AU2016212425A AU2016212425B2 (en) | 2015-01-29 | 2016-01-29 | Eccentric screw pump having an automatic adjustment system and adjustment method |
DE112016000540.7T DE112016000540A5 (de) | 2015-01-29 | 2016-01-29 | Exzenterschneckenpumpe mit einem automatischen verstellsystem und einstellverfahren |
KR1020177021460A KR20170096638A (ko) | 2015-01-29 | 2016-01-29 | 자동 조정 시스템을 포함한 편심 스크류 펌프, 그리고 조정 방법 |
JP2017540150A JP2018507345A (ja) | 2015-01-29 | 2016-01-29 | 偏心ねじポンプ及び偏心ねじポンプの作動状態を適合させるための方法 |
RU2017130347A RU2017130347A (ru) | 2015-01-29 | 2016-01-29 | Одновинтовой насос с системой автоматического регулирования и способ регулирования |
US15/547,419 US20180010604A1 (en) | 2015-01-29 | 2016-01-29 | Eccentric Screw Pump And Method For Adapting The Operating State Of An Eccentric Screw Pump |
ZA2017/04734A ZA201704734B (en) | 2015-01-29 | 2017-07-13 | Eccentric screw pump having an automatic adjustment system and adjustment method |
Applications Claiming Priority (4)
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DE102015101353 | 2015-01-29 | ||
DE102015101353.3 | 2015-01-29 | ||
DE102015112248.0A DE102015112248A1 (de) | 2015-01-29 | 2015-07-28 | Exzenterschneckenpumpe und Verfahren zum Anpassen des Betriebszustands einer Exzenterschneckenpumpe |
DE102015112248.0 | 2015-07-28 |
Publications (1)
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WO2016119775A1 true WO2016119775A1 (de) | 2016-08-04 |
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PCT/DE2016/000033 WO2016119775A1 (de) | 2015-01-29 | 2016-01-29 | Exzenterschneckenpumpe mit einem automatischen verstellsystem und einstellverfahren |
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US (1) | US20180010604A1 (de) |
EP (1) | EP3250829B1 (de) |
JP (1) | JP2018507345A (de) |
KR (1) | KR20170096638A (de) |
CN (1) | CN107208630A (de) |
AU (1) | AU2016212425B2 (de) |
DE (2) | DE102015112248A1 (de) |
RU (1) | RU2017130347A (de) |
WO (1) | WO2016119775A1 (de) |
ZA (1) | ZA201704734B (de) |
Cited By (1)
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---|---|---|---|---|
EP4043731A1 (de) * | 2021-02-16 | 2022-08-17 | Vieweg GmbH | Exzenterschnecken-dosiervorrichtung und verfahren zur steuerung einer exzenterschnecken-dosiervorrichtung |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015101352A1 (de) * | 2015-01-29 | 2016-08-04 | Netzsch Pumpen & Systeme Gmbh | Stator-Rotor-System und Verfahren zum Einstellen eines Stators in einem Stator-Rotor-System |
GB201514001D0 (en) * | 2015-08-07 | 2015-09-23 | Edwards Ltd | Pumps |
DE102017100715A1 (de) * | 2017-01-16 | 2018-07-19 | Hugo Vogelsang Maschinenbau Gmbh | Regelung der Spaltgeometrie in einer Exzenterschneckenpumpe |
DE102018111120A1 (de) * | 2018-05-09 | 2019-11-14 | J. Wagner Gmbh | Verfahren zum Betrieb einer Fördervorrichtung und Fördervorrichtung |
DE102019130981A1 (de) | 2019-11-15 | 2021-05-20 | Seepex Gmbh | Exzenterschneckenpumpe |
DE102020111386A1 (de) * | 2020-04-27 | 2021-10-28 | Vogelsang Gmbh & Co. Kg | Zustandserfassung an Exzenterschneckenpumpen |
CN112099220A (zh) * | 2020-09-30 | 2020-12-18 | 青岛大学附属医院 | 一种新型病理检验用多向式显微镜托架 |
DE102021131427A1 (de) | 2021-11-30 | 2023-06-01 | Vogelsang Gmbh & Co. Kg | Exzenterschneckenpumpe mit Arbeitszustellung und Ruhezustellung sowie Verfahren zum Steuern der Exzenterschneckenpumpe |
DE102022119147A1 (de) | 2022-07-29 | 2024-02-01 | Ruhr-Universität Bochum, Körperschaft des öffentlichen Rechts | Verfahren zur Bestimmung oder Überwachung des Förderstroms einer Exzenterschneckenpumpe |
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2015
- 2015-07-28 DE DE102015112248.0A patent/DE102015112248A1/de not_active Withdrawn
-
2016
- 2016-01-29 EP EP16708338.5A patent/EP3250829B1/de active Active
- 2016-01-29 WO PCT/DE2016/000033 patent/WO2016119775A1/de not_active Application Discontinuation
- 2016-01-29 CN CN201680007394.0A patent/CN107208630A/zh active Pending
- 2016-01-29 RU RU2017130347A patent/RU2017130347A/ru unknown
- 2016-01-29 AU AU2016212425A patent/AU2016212425B2/en active Active
- 2016-01-29 US US15/547,419 patent/US20180010604A1/en not_active Abandoned
- 2016-01-29 DE DE112016000540.7T patent/DE112016000540A5/de not_active Withdrawn
- 2016-01-29 JP JP2017540150A patent/JP2018507345A/ja active Pending
- 2016-01-29 KR KR1020177021460A patent/KR20170096638A/ko not_active Application Discontinuation
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2017
- 2017-07-13 ZA ZA2017/04734A patent/ZA201704734B/en unknown
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DD279043A1 (de) * | 1988-12-29 | 1990-05-23 | Hydrogeologie Nordhausen Halle | Stator fuer exzenterschneckenpumpen |
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DE10157143A1 (de) | 2001-11-21 | 2003-05-28 | Netzsch Mohnopumpen Gmbh | Wartungsintervallanzeige für Pumpen |
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JP2009235976A (ja) | 2008-03-27 | 2009-10-15 | Heishin Engineering & Equipment Co Ltd | 回転容積型ポンプの流量制御方法と同流量制御システム |
JP2010001104A (ja) | 2008-06-18 | 2010-01-07 | Kuraimu Prod Kk | 保護フィルムの剥離装置 |
JP2010281280A (ja) | 2009-06-05 | 2010-12-16 | Heishin Engineering & Equipment Co Ltd | 一軸偏心ねじポンプに使用するゴム製部材の劣化診断方法及び装置 |
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EP4043731A1 (de) * | 2021-02-16 | 2022-08-17 | Vieweg GmbH | Exzenterschnecken-dosiervorrichtung und verfahren zur steuerung einer exzenterschnecken-dosiervorrichtung |
Also Published As
Publication number | Publication date |
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RU2017130347A3 (de) | 2019-03-01 |
DE102015112248A1 (de) | 2016-08-04 |
JP2018507345A (ja) | 2018-03-15 |
AU2016212425B2 (en) | 2019-06-13 |
KR20170096638A (ko) | 2017-08-24 |
CN107208630A (zh) | 2017-09-26 |
RU2017130347A (ru) | 2019-03-01 |
AU2016212425A1 (en) | 2017-07-13 |
ZA201704734B (en) | 2018-08-29 |
EP3250829B1 (de) | 2020-08-05 |
DE112016000540A5 (de) | 2017-12-21 |
EP3250829A1 (de) | 2017-12-06 |
US20180010604A1 (en) | 2018-01-11 |
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