阅读说明：本技术 用于隔膜流体泵的驱动装置和操作方法 (Drive device for diaphragm fluid pump and method of operation ) 是由 R·施泰因格雷伯 于 2019-03-01 设计创作，主要内容包括：本发明涉及用于隔膜流体泵的驱动装置,包括：工作泵,该工作泵为了驱动隔膜流体泵而通过压力管线连接到隔膜流体泵,且该工作泵具有空心缸和工作活塞,该工作活塞能在该空心缸中在两个换向点之间来回轴向运动以增减工作泵中的与压力管线处于压力交换连通的工作室,用于控制该工作活塞在换向点之间运动的控制单元,其特征是,该工作活塞的受控运动包括三个时间接续的阶段,其中,在第一阶段中该工作活塞被加速到大于第一阶段结束时的速度的速度,在第二阶段中如此移动该工作活塞,即该工作活塞的预定速度、该工作室中的预定相对压力或该工作活塞的预定力保持基本恒定,而在第三阶段中该工作活塞以负加速度运动。(The invention relates to a drive device for a diaphragm fluid pump, comprising: a working pump which is connected to the diaphragm fluid pump via a pressure line for driving the diaphragm fluid pump and which has a hollow cylinder and a working piston, the working piston can move axially back and forth in the hollow cylinder between two reversal points to increase or decrease a working chamber in the working pump, which is in pressure exchange communication with the pressure line, a control unit for controlling the movement of the working piston between the reversal points, characterized in that the controlled movement of the working piston comprises three time-sequential phases, wherein in a first phase the working piston is accelerated to a speed which is greater than the speed at the end of the first phase, in a second phase the working piston is moved in such a way, i.e. the predetermined speed of the working piston, the predetermined relative pressure in the working chamber or the predetermined force of the working piston, is kept substantially constant, while in the third phase the working piston is moved with a negative acceleration.)

1. A drive arrangement for a diaphragm fluid pump, the drive arrangement comprising:

a working pump, wherein the working pump is connected to the diaphragm fluid pump by a pressure line for driving the diaphragm fluid pump, and wherein the working pump has a hollow cylinder and a working piston which is axially movable back and forth in the hollow cylinder between two reversal points in order to reduce or increase a working chamber in the working pump which is in pressure exchange communication with the pressure line; and

a control unit for controlling the working piston to move between the reversal points,

characterized in that the controlled movement of the working piston comprises three phases which are successive in time, wherein in a first phase the working piston is accelerated to a speed which is greater than the speed at the end of the first phase, the working piston is moved in a second phase such that a predetermined speed of the working piston, a predetermined relative pressure in the working chamber or a predetermined force of the working piston is kept substantially constant, and,

in the third phase, the working piston moves with a negative acceleration.

2. The drive device as claimed in claim 1, characterized in that the control unit is set up for controlling the movement of the working piston as a function of a position setpoint for the working piston over time, wherein the speed of the working piston remains substantially constant in the second phase, and/or the control unit is set up for controlling the movement of the working piston as a function of a relative pressure setpoint for the working chamber over time, wherein the relative pressure in the working chamber remains substantially constant in the second phase, and/or the control unit is set up for controlling the movement of the working piston as a function of a force setpoint for the working piston over time, wherein the force of the working piston remains substantially constant in the second phase.

3. The drive of any one of the preceding claims, wherein the force of the working piston comprises the load and inertia of the working piston.

4. The drive device as claimed in claim 2, characterized in that the control unit is set up for determining the position setpoint over time on the basis of a relative pressure setpoint over time and for controlling the working piston movement in accordance with the position setpoint.

5. The drive of any one of claims 2 to 4, wherein the position set point over time further comprises a speed set point over time and/or an acceleration set point over time.

6. The drive device as claimed in any one of the preceding claims, characterized in that the working pump comprises a balancing valve for changing the air mass and/or the relative pressure in the working chamber, and the control unit is set up for controlling the balancing valve as a function of a set value for the air mass and/or a set value for the relative pressure, in particular controlling the balancing valve in such a way that the air mass is kept constant and/or the balancing valve is controlled as a function of a set value for the average relative pressure, a set value for the average emptying pressure, a set value for the average filling pressure, and/or the balancing valve is controlled as a function of a set value for the relative pressure and/or a set value for one or both reversal points.

7. The drive device according to one of the claims 2 to 6, characterized in that the control unit is set up for determining the position setpoint over time on the basis of a reference movement trajectory of the working piston, wherein the reference motion profile takes into account a predetermined duration of the first phase, a predetermined duration of the second phase, a predetermined change in acceleration of the piston in the first phase, a predetermined piston stroke, a predetermined maximum relative pressure, a predetermined pump speed, a predetermined relative emptying duration, a predetermined degree of filling, a predetermined degree of emptying, a predetermined characteristic value of the diaphragm fluid pump to be connected, in particular a delivery volume of the diaphragm fluid pump, a predetermined characteristic value of an inlet cannula connectable to the diaphragm fluid pump and/or a predetermined characteristic value of an outlet cannula connected to the diaphragm fluid pump.

8. Drive arrangement according to one of claims 2 to 7, characterized in that the drive arrangement for driving the working piston has a spindle motor and the control unit is set up for determining the drive current strength of the spindle motor on the basis of an estimated torque required by the spindle motor for controlling the movement of the working piston in accordance with a position setpoint over time, wherein the torque comprises the load of the working piston, the inertia of the working piston, an estimated friction of the working piston and/or a correction torque for compensating a position deviation and/or a speed deviation of the working piston relative to the position setpoint over time.

9. The drive according to claim 8, characterized in that a current position and/or a current speed of the working piston is measured during operation by means of a position sensor, and the control unit is set up for determining a position deviation and/or a speed deviation relative to the position set value over time, determining the correction torque on the basis of the position deviation and/or the speed deviation, and adjusting the drive current intensity in such a way that the position deviation and/or the speed deviation of the working piston is reduced.

10. The drive device according to any one of the preceding claims, characterized in that a user interface is provided, by means of which user-specific parameters, in particular the degree of filling and/or degree of emptying, the piston stroke, the mean relative pressure, the relative emptying duration, the emptying pressure, the filling pressure and/or the pump speed of the membrane pump, can be adjusted during operation.

11. The drive arrangement according to claim 10, characterized in that the control unit is set up for adjusting the position set point over time, the relative pressure set point over time and/or the force set point over time and/or the air mass set point, the relative pressure set point and/or the set point of one or both of the two reversal points for the control of the balancing valve during the operation to the change of the user-specific parameter.

12. The drive device according to any one of claims 6 to 11, characterised in that the control unit is set up for adjusting the degree of filling of the membrane pump by a change of the piston stroke and a control of the balancing valve or by a change of the mean relative pressure of the balancing valve according to the set value of the mean emptying pressure in the working chamber, and/or for adjusting the degree of emptying by a change of the piston stroke and a control of the balancing valve and/or by a change of the mean relative pressure of the balancing valve according to the set value of the mean filling pressure in the working chamber.

13. A pump system, the pump system comprising:

a diaphragm fluid pump for a fluid having a diaphragm,

an inlet cannula connected to the diaphragm fluid pump for supplying fluid to the diaphragm fluid pump and an outlet cannula connected to the diaphragm fluid pump for discharging fluid from the diaphragm fluid pump,

characterized in that a drive device for a diaphragm fluid pump according to any of the preceding claims is provided.

14. A heart assist system, the heart assist system comprising:

a diaphragm blood pump is provided,

an inlet cannula connected to the membrane blood pump for supplying blood from the ventricle and/or atrium to the membrane blood pump and an outlet cannula connected to the membrane blood pump for discharging blood from the membrane blood pump into a blood vessel,

characterized in that a drive device for the diaphragm blood pump according to one of the claims 1 to 12 is provided.

15. Method of operating a drive device for a diaphragm fluid pump according to any one of claims 1 to 12, characterised in that the movement of the working piston is controlled such that it comprises three time-sequential phases, wherein the working piston is accelerated in a first phase to a speed which is greater than the speed at the end of the first phase, the working piston is moved in a second phase such that the predetermined speed of the working piston, the predetermined relative pressure in the working chamber or the predetermined force of the working piston remains substantially constant, and in the third phase the working piston is moved with a negative acceleration.

16. A method according to claim 15, characterised by controlling the movement of the working piston in dependence of a position set point over time for the working piston, wherein in the second phase the speed of the working piston is kept substantially constant and/or the movement of the working piston is controlled in dependence of a relative pressure set point over time for the working chamber, wherein in the second phase the relative pressure in the working chamber is kept substantially constant and/or the movement of the working piston is controlled in dependence of a force set point over time for the working piston, wherein the force of the working piston is kept substantially constant.

17. The method of claim 16, wherein the position set point over time is determined based on the relative pressure set point over time, and movement of the working piston is controlled in accordance with the position set point over time.

18. A method according to claim 16, characterised in that in the first and respective third phase the movement of the working piston is controlled according to the position set-point over time, and in the second phase the movement of the working piston is controlled according to the relative pressure set-point over time and/or the force set-point over time.

19. Method according to any one of claims 16-18, characterized in that the working pump comprises a balancing valve for changing the air mass and/or the relative pressure in the working chamber, wherein the movement of the working piston is controlled as a function of the position set point over time and the balancing valve is controlled as a function of a set point for the mean relative pressure, or wherein the movement of the working piston is controlled as a function of the relative pressure set point over time or as a function of the force set point over time and the balancing valve is controlled in such a way that the air mass is minimized at the end of the emptying phase.

20. Method according to any one of claims 16 to 19, characterized in that the position set point over time is determined on the basis of a reference movement profile of the working piston, which takes into account a predetermined duration of the first phase, a predetermined duration of the second phase, a predetermined change in acceleration of the working piston in the first phase, a predetermined working piston stroke, a predetermined maximum relative pressure, a predetermined pump speed, a predetermined relative emptying duration, a predetermined degree of filling, a predetermined degree of emptying, a predetermined characteristic value of the diaphragm fluid pump to be connected, in particular a delivery volume of the diaphragm fluid pump, a predetermined characteristic value of the inlet cannula connectable to the diaphragm fluid pump and/or a predetermined characteristic value of the outlet cannula connectable to the diaphragm fluid pump.

21. Method according to any of the preceding claims, characterized in that the drive means for driving the working piston have a spindle motor and that the current strength for the drive means is determined on the basis of an estimated torque required by the spindle motor for controlling the movement of the working piston in dependence of the position setpoint over time, wherein the torque comprises the load of the working piston, the inertia of the working piston, an estimated friction of the working piston and/or a correction torque for compensating a position deviation and/or a speed deviation of the working piston relative to the position setpoint over time.

22. Method according to claim 21, characterized in that during operation the current position and/or the current speed of the working piston is measured by means of a position sensor and the position deviation and/or the speed deviation is determined in relation to the position set point over time, on the basis of which the correction torque is determined and the drive current intensity is adjusted such that the position deviation and/or the speed deviation of the working piston in relation to the position set point over time is reduced.

23. Method according to any of the preceding claims, characterized in that user-specific parameters, in particular the degree of filling and/or emptying of the diaphragm fluid pump, the piston stroke, the mean relative pressure, the relative emptying duration, the emptying pressure, the filling pressure and/or the pump speed, are adjusted during the operation, and that the position set point over time, the relative pressure set point over time and/or the force set point over time and/or the air mass set point for the motion control of the working piston, the relative pressure set point and/or the air mass set point are adjusted to the change in user-specific parameters at one or both of the two reversal points for balanced valve control in operation.

24. A method according to any of claims 19-23, characterised in that the predetermined degree of filling of the membrane pump is adjusted by a change of the piston stroke and a control of the balancing valve according to the set value of the average emptying pressure in the working chamber, or by a change of the average relative pressure by means of the balancing valve; and/or by controlling the balancing valve by means of a change in the piston stroke and a set value of the average filling pressure in the working chamber and/or by means of a change in the average relative pressure of the balancing valve.