Valve driving device

Abstract

The present application relates to a valve drive device (1) comprising: a base element (2), a lifting rod (6) for driving a valve body (26), a rotor (3) and a rotation limiting device (9); wherein the lifting lever (6) can be moved in a translational and non-rotational manner along its longitudinal axis (L) relative to the base element (2) between a first end position and a second end position different from the first end position, the rotor (3) is rotated about the longitudinal axis (L) for driving the lifting lever (6), and wherein a rotational movement of the rotor (3) is converted by a transmission (8) into a translational and non-rotational movement of the lifting lever (6), rotation limiting means (9) are provided for limiting the rotational movement of the rotor (3) between a first end stop point and a second end stop point, where the lifting lever (6) is in the end position when the rotor (3) is rotated to the first end stop point and the lifting lever (6) is in the end position when the rotor (3) is rotated to the second end stop point.

Description

Technical Field

[0001] The present application relates to a valve drive device, which comprises: a base element, a lifting rod for driving a valve body, wherein the lifting rod moves along its longitudinal axis relative to the base element between a first end position and a second end position different from the first end position in a translational and non-rotational manner. In addition, the valve drive device further comprises a rotor rotatable about a longitudinal axis (L) to drive the lifting rod, wherein the rotational movement of the rotor can be converted into the translational and non-rotational movement of the lifting rod by a transmission device.

[0002] In addition, the present application also relates to a valve for blocking and / or controlling fluid flow, wherein the valve includes a valve body, which is configured to move between a fully closed position and a fully open position within a valve housing. The present application also relates to a method for manufacturing a valve drive device. Prior art

[0003] In the prior art, known valve drive devices usually have a drive shaft that is rotated by a drive device. The rotation of the drive shaft is converted into a translational movement by a thread, so that the valve body moves between the closed and open positions. This leads to many disadvantages. For example, a rotational decoupling device needs to be installed between the drive shaft and the valve body to prevent the drive shaft and the valve body from getting stuck in the sealing seat under high torque conditions. In order to reduce the wear between the drive shaft and the valve body, at least one sliding disk must be provided to minimize the contact surface and friction between the drive shaft and the valve body. Another disadvantage is that the drive shaft (including the rotor) moves axially relative to the stator. Despite this axial relative movement, the stator is still required to be able to transmit sufficient torque to the rotor. Summary of the invention

[0004] The purpose of the present application is to provide a valve drive device belonging to the above technical field, which at least partially overcomes the disadvantages of the prior art. Specifically, the purpose of the present application is to provide an improved concept of a valve drive device.

[0005] The solution to the problem is defined by the features of claim 1. The valve drive device according to the present application comprises: a base element, a lifting rod for driving a valve body, wherein the lifting rod moves along its longitudinal axis relative to the base element between a first end position and a second end position different from the first end position in a translational and non-rotational manner. In addition, the valve drive device according to the present application also comprises a rotor that can rotate about the longitudinal axis to drive the lifting rod, wherein the rotational movement of the rotor can be converted into a translational and non-rotational movement of the lifting rod by a transmission device. In addition, the valve drive device also comprises a rotation limiting device for limiting the rotational movement of the rotor between a first end stop point and a second end stop point, wherein when the rotor rotates to the first end stop point, the lifting rod is in the first end position, and when the rotor rotates to the second end stop point, the lifting rod is in the second end position.

[0006] This has technical advantages, for example, the lifting stem can be configured to move in a purely translatory and completely rotation-free manner. This means that no rotational decoupling is required between the valve body and the lifting stem. In addition, since there is no relative movement between the components, the amount of wear is greatly reduced and therefore no sliding disc is required. This means that the service life of the valve drive and therefore the entire valve is extended.

[0007] In another embodiment, at least a portion of the rotation limiting device is arranged radially between the lifting rod and the rotor. This has technical advantages, for example, the valve drive device and the entire valve can be designed to be very compact and space-saving.

[0008] According to a preferred embodiment, the rotation limiting device comprises a stop sleeve and a driver, wherein the driver is arranged between the stop sleeve and the rotor, the driver is connected to the rotor in a rotationally fixed and slidingly movable manner, and the stop sleeve comprises a guide rail for guiding the driver. This has technical advantages, for example, the rotation limiting device limits the movement interval of the rotor, thereby extending the working time of the valve drive device and thus extending the working time of the entire valve. A further technical advantage is that the rotor itself does not move axially relative to the stator. The rotation limiting device compensates the axial movement by a driver that performs axial movement. The driver moves only axially relative to the rotor. In other words, the rotor can transmit torque to the driver. Therefore, the torque is transmitted from the stator to the rotor and then directly to the driver. The driver moves through the guide rail of the stop sleeve under the action of the torque. The axial movement of the lifting rod is realized by the transmission device, while the rotation limiting device with the driver and the stop sleeve defines the first end position and the second end position of the lifting rod, wherein the rotor always maintains an axially unchanged position. This further improves the compact design of the valve drive device and achieves optimal torque transmission between the stator and the rotor. Therefore, the rotor can be designed to be more compact in the axial direction.

[0009] In order to prevent the axial movement of the rotor, the rotational movement of the rotor causes the rotational movement of the driver around the stop sleeve, and the driver moves in the guide rail. This has technical advantages, for example, the rotation restriction device slides axially together with the driver, and the engagement of the driver with the guide rail enables an instant relative movement between the driver and the rotor and between the driver and the guide rail. Therefore, no axial movement occurs between the rotor and the stator.

[0010] According to a particularly preferred embodiment, the guide rail is formed as a spiral groove in the stop sleeve, and the driver comprises a first projection, which is arranged to engage with the spiral groove of the stop sleeve. This has technical advantages, for example, the driver can slide as smoothly as possible in the guide rail via the first projection. The spiral design of the guide rail enables the driver to move regularly and continuously in the guide rail. This establishes a direct and proportional movement relationship between the axial position of the lifting rod and the position of the driver in the guide rail. In addition, the guide rail can also be equipped with sections with different slopes. For example, the end section of the guide rail has a lower slope, which can achieve a lower starting torque.

[0011] In order to define a fully retracted position of the lifting rod in the sense of a first end stop and a fully extended position of the lifting rod in the sense of a second end stop, the guide rail comprises a first guide rail end and a second guide rail end. The first guide rail end defines the first end stop of the rotor and the second guide rail end defines the second end stop of the rotor. This has technical advantages, for example, that a simple and clear range of movement of the lifting rod can be defined. When the first end stop is reached, the valve is fully open, which means that the lifting rod cannot be retracted any further.

[0012] When the second end stop is reached, the valve is completely closed, which means that the valve body is completely seated in the valve seat. The end stops are each prevented by a mechanical stop from further axial movement under applied torque, thus preventing the components from seizing due to self-locking. Another particular advantage is the simple adaptability of the valve drive to the setting conditions. Replacing the stop sleeve requires only minimal effort, which means that the end stops can also be adjusted to the application.

[0013] According to a further preferred embodiment, the stop sleeve is connected to the base element in a rotationally fixed manner. Preferably, the stop sleeve is arranged in a non-rotating manner relative to the base element. This has the technical advantage that, for example, a rotational relative movement between the lifting rod and the stop sleeve is not possible using very simple means. This ensures the functionality of the valve drive on the one hand and facilitates assembly of the valve drive on the other hand.

[0014] According to a particularly preferred embodiment, the lifting rod is arranged in a rotationally fixed and slidingly movable manner in the base element. In particular in combination with the previous embodiment, according to which the stop sleeve is also arranged in a rotationally fixed manner relative to the base element, it is possible to compensate for manufacturing tolerances between the individual components and to achieve an exact positioning of the lifting rod.

[0015] In order to prevent an axial movement of the rotor relative to the stator, the rotor comprises a guide, wherein the driver is connected to the rotor via the guide in a rotationally fixed and slidingly movable manner. This has technical advantages, for example, that axial movement forces of the rotor can be compensated by the driver. For example, the guide comprises an axially aligned groove on the inner wall of the rotor. In this way, the driver can only move longitudinally relative to the rotor and can slide along the groove on the rotor. This allows only a torque to be transmitted from the rotor to the driver, wherein the driver moves through the guide rail of the stop sleeve under the effect of the torque. Here, the driver comprises a second projection, which engages with the guide rail and can slide to a large extent without friction.

[0016] According to a further preferred embodiment, the lifting rod comprises a control end for controlling the valve body in the longitudinal direction, while the transmission device is arranged at the end of the lifting rod opposite to the control end. This has technical advantages, for example, the control end is configured only for accurately transmitting axial movement to the valve body. For example, the control end is provided with a spring element, so that the valve body is pressed into the valve head bearing with a set biasing force. The transmission device comprises an internal thread, which can convert the rotational movement of the rotor into the translational movement of the lifting rod. By arranging the control end on the other side of the transmission device, a spatial gap can be formed between the mechanical transmission from rotation to translation and the precise axial positioning of the valve body. This separation simplifies assembly and reduces wear on the valve body. This prolongs the service life of the valve drive device.

[0017] According to a particularly preferred embodiment, the lifting rod is mounted so that it can be biased relative to the valve body to be controlled. This has technical advantages, for example, in that the valve body is pressed into the valve seat with a set biasing force. For example, a spring element is arranged between the lifting rod and the valve body. This can improve the tightness of the valve and reduce wear. In addition, it can prevent the valve body from sticking or self-locking.

[0018] In order to provide a particularly compact and space-saving drive for actuating the valve drive, the valve drive comprises a stepper motor, wherein the stepper motor comprises a stator and a rotor, the stator at least partially enclosing the rotor, the rotational movement of the rotor being controllable by the stator.

[0019] According to a particularly advantageous embodiment, the axial alignment of the stator relative to the rotor is set constant during the rotational movement of the rotor between the first end stop and the second end stop. This has technical advantages, for example, that the compact design of the valve drive can be improved and an optimal torque transmission between the stator and the rotor can be achieved. As a result, the rotor can be designed to be significantly more compact in the axial direction.

[0020] According to a further embodiment, the lifting rod comprises a control end for controlling the valve body in the longitudinal direction, and the transmission device is arranged between the control end and the stop sleeve. This has technical advantages, for example, the entire valve drive can be designed to be more compact in the longitudinal direction. For example, the transmission device can be designed as a component of the lifting rod. In general, the lifting rod can be designed to be shorter, wherein the lifting rod only needs to be supported at the control end. This not only reduces the manufacturing costs, but also reduces the requirements for geometric specifications and tolerance specifications. For example, the transmission device can be formed in one piece with the lifting rod.

[0021] According to a further advantageous embodiment, the valve drive comprises a cover element which is connected to the stop sleeve in a rotationally fixed manner via a meshing portion. This has technical advantages, for example, in that the stop sleeve can be very easily fastened to the cover element and thereby fixed in a rotationally fixed manner relative to the rotor. For example, the meshing portion is designed to be longitudinally movable, thereby enabling longitudinal tolerance compensation. Overall, the valve drive can be assembled more easily.

[0022] According to another embodiment, the rotor is mounted on the base element via roller bearings. This has technical advantages, for example, the rotor can be mounted precisely in the axial and radial directions, and the assembly of the entire valve drive is greatly simplified. The roller bearings provide a high degree of stability for the valve drive, which is why the manufacturing tolerances of all the remaining components can be reduced. Overall, the valve drive is cheaper to manufacture, easier to assemble, and the friction of the bearings is greatly reduced.

[0023] According to a particularly advantageous embodiment, the valve drive comprises a deep-drawn cover sleeve which is firmly connected to the base element, wherein the rotor and the rotation limiting device are preferably completely accommodated in the cover sleeve. This has technical advantages, for example, that the valve drive is shielded from the outside and is protected by the cover sleeve. The deep-drawn cover sleeve is particularly easy to manufacture and assemble.

[0024] In order to further simplify the assembly of the valve drive and prevent the stop sleeve from rotating during the operation of the valve drive, the cover sleeve includes a sleeve extension for engaging with the stop sleeve, wherein the sleeve extension is designed to fix the stop sleeve relative to the cover sleeve at least in a non-rotatable manner. The fixed connection between the cover sleeve and the base portion indirectly ensures that the cover sleeve will not rotate relative to the base portion. For example, the sleeve extension can be a fixed component of the cover sleeve. Therefore, when the cover sleeve is deep-drawn, the sleeve extension can be taken into account and produced in the same processing step. For example, the longitudinal cross-section of the sleeve extension is designed as a three-plane shape to ensure that the stop sleeve does not rotate. However, as an alternative, any other suitable cross-sectional shape can also be conceived to meet the function of form fit to prevent rotation.

[0025] According to a particularly preferred embodiment, the base element comprises a guide device, wherein the guide device is configured to guide the lifting rod axially along the longitudinal profile. This has technical advantages, for example, a purely translational movement of the lifting rod can be ensured. Due to the purely translational movement of the lifting rod, no rotational decoupling is required between the valve body and the lifting rod. In addition, since there is no relative movement between the components, the amount of wear is also reduced, so that a sliding disk is no longer required. Overall, the service life of the valve drive and the service life of the entire valve are extended. In addition, contamination due to wear can also be avoided. For example, the guide device comprises a guide disk, which is arranged in the base element and can be mounted in a non-rotatable manner relative to the base element. The lifting rod passes through the guide disk, and the longitudinal profile of the lifting rod is located in a radially arranged guide slot on the guide disk. Alternatively, the guide slot can also be called a guide tongue.

[0026] According to an alternative of the present application, the solution to the problem is defined by the features of claim 20. The alternative comprises a valve for blocking and / or controlling the flow of a fluid. The valve comprises a valve body, which is configured to be movable between a fully closed position and a fully open position within a valve housing. Furthermore, the valve comprises a valve drive according to one of the preceding claims, wherein the position of the valve body can be controlled by a lifting rod of the valve drive.

[0027] The advantages of this alternative solution are comparable to those of the previous embodiment. In particular, its technical advantage is that the lifting rod is configured to move only in translation, without any rotation, so it is no longer necessary to provide a rotational decoupling between the valve body and the lifting rod. Likewise, a sliding disc is not required, as the amount of wear is greatly reduced. Another advantage of the closing sleeve is that it increases robustness and reduces the number of components. This means that the service life of the valve can be extended.

[0028] Different types of valves can be combined with the valve drive device according to the invention. For example, the valve can also comprise two closed end positions.

[0029] In an exemplary further embodiment, the valve comprises a sealing element. The sealing element may be arranged on the valve body and / or at least partially arranged in the valve body. Preferably, the sealing element is configured to achieve a liquid-tight contact with a sealing seat of the valve housing. In particular, this may occur when the valve body is in a fully closed position. For example, the sealing element may be a sealing ring. When the sealing element is in liquid-tight contact with the sealing seat, preferably there is no fluid flow, or at least only a negligible fluid flow, between the sealing element and the sealing seat. The valve, in particular the valve body, may also comprise a plurality of sealing elements.

[0030] The sealing element helps to ensure that fluid flow is very effectively blocked when the valve body is in the fully closed position.

[0031] In another exemplary embodiment of the valve, the valve housing comprises a first sealing seat and a second sealing seat, in particular a second sealing seat different from the first sealing seat. For example, the first sealing seat can be spaced apart from the second sealing seat in an axial direction relative to the longitudinal axis of the valve. Preferably, the first sealing seat and the second sealing seat are arranged opposite to each other. The shapes of the two sealing seats can be the same or different. Preferably, the valve body can move between the first sealing seat and the second sealing seat, in particular it can move back and forth repeatedly.

[0032] The embodiment of the valve with the first sealing seat and the second sealing seat has the advantage that the valve, in particular the valve body of the valve, can be moved between two different fully closed positions, in particular between a first fully closed position and a second fully closed position. Preferably, the valve body is placed in a fully open position between the two fully closed positions. This has the advantage that the valve can be designed as a 3 / 2-way valve.

[0033] In another exemplary embodiment, the valve may include a spring element. Preferably, the spring element is a helical spring. In the axial direction relative to the longitudinal axis, the spring element may be arranged between the lifting rod and the valve body. Therefore, the elastic force of the spring element may act on the lifting rod and / or the valve body.

[0034] The spring element has the beneficial effect that the valve body can be pushed and / or pulled into a completely closed position by a preset force, in particular a preset elastic force of the spring element. Thus, a particularly high sealing effect can be achieved.

[0035] As an alternative, the spring element can also be arranged in a spring chamber of the valve body. The spring chamber can be a cavity in the valve body. The lifting rod preferably extends at least partially into the spring chamber of the valve body. Such a valve design is conducive to making the valve drive and the valve form a particularly compact design.

[0036] In a further advantageous development of the above-mentioned valve design, the spring element is configured to press the valve body into the first sealing seat. The spring element is preferably also configured to press the valve body into the second sealing seat. This further advantageous development allows the valve body to always rest against the first or second sealing seat with a preset force. As a result, a very high sealing effect can be achieved. The stroke ends when the end stop in the guide block is reached. Depending on the tolerance grade, the spring is more or less slightly biased, but the force varies only within a small range. As a result, the closing force of the sealing seat is determined and varies only within a small range.

[0037] In another exemplary embodiment, the valve comprises a force transmission device. The force transmission device is preferably configured and / or arranged in such a way that, depending on the position of the lifting rod, the spring element is connected to the lifting rod or the valve body in a force-transmitting manner. For example, when the lifting rod is in a first end position, the lifting rod can apply a compressive force to the spring element via the force transmission device. When the lifting rod is in a second end position, the spring element can apply a compressive force to the valve body via the force transmission device. The force transmission device is preferably arranged in a spring cavity of the valve body.

[0038] In a further improvement of the above embodiment, the valve may include multiple force transmission devices, specifically two. For example, a first force transmission device may be provided at the first end of the spring element, and a second force transmission device may be provided at the second end of the spring element. Both force transmission devices may be arranged in the spring chamber of the valve body.

[0039] When the lifting rod is in the first end position, the lifting rod can exert a first compressive force on the spring element via the first force transmission device. The first compressive force can preferably cause the spring element to exert a first elastic force on the second force transmission device, and the first elastic force is transmitted to the valve body via the second force transmission device. As a result, the valve body is advantageously moved in the direction of the first compressive force.

[0040] When the lifting rod is in the second end position, the lifting rod can apply a second compressive force to the spring element via the second force transmission device. The second compressive force is preferably opposite to the direction of action of the first compressive force. The second compressive force is preferably capable of causing the spring element to apply a second elastic force opposite to the direction of the first elastic force to the first force transmission device, and the second elastic force is transmitted to the valve body via the first force transmission device. As a result, the valve body advantageously moves in the direction of the second compressive force.

[0041] The embodiment with a force transmission device can ensure that, in particular, the control movement of the lifting rod can be transmitted very well (e.g. very evenly) to the spring element, and / or the spring element can transmit its spring force very well (e.g. very evenly) to the valve body. This has the advantage that the possibility of the valve body getting stuck in the valve housing can be greatly reduced, thereby reducing unnecessary wear or malfunction of the valve.

[0042] According to a further alternative of the present application, the solution to the problem is defined by the features of claim 21. The alternative comprises a method for manufacturing a valve drive according to one of the preceding embodiments, wherein the method comprises the following steps: arranging a stop sleeve on a lifting rod, arranging a driver on a guide rail of the stop sleeve, placing a rotor on the stop sleeve and inserting the driver into the guide, and fixing the transmission device on the lifting rod.

[0043] The advantages of this alternative are comparable to those of the previous embodiment. In addition, the technical advantage in terms of manufacturing technology is that the assembly and adaptability of the valve drive is very simple and error-prone. The components can be easily assembled and replaced depending on the application. For example, it may be useful to adjust the valve lift. For example, by replacing the stop sleeve with a correspondingly designed guide rail, the first end stop point and / or the second end stop point can be easily changed. For example, when replacing the stop sleeve, it is only necessary to remove the transmission from the lifting rod, the rotor from the stop sleeve, the drive from the guide rail, and the existing stop sleeve from the lifting rod. According to the alternative embodiment, for example, an existing stop sleeve can be replaced by simply removing the cover or the sleeve.

[0044] Subsequently, a new locking sleeve must be mounted on the lifting rod, the drive must be arranged on the guide rails of the new locking sleeve and the corresponding components must be reassembled depending on the specific embodiment.

[0045] According to a further embodiment, the lifting rod is offset in the axial direction. This has the technical advantage that, for example, the stroke of the lifting rod can be adjusted in a very precise manner. Thus, for example, it can be ensured that the valve body is pressed against the sealing seat with a preset force in the fully closed end position.

[0046] The following detailed description and the entire claims provide further advantageous embodiments and feature combinations of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The various features described above as examples can be combined with each other according to the present application as long as they are technically reasonable and feasible. More combinable features, advantages and implementation schemes of the present application can be found in the following description of each implementation scheme in conjunction with the accompanying drawings.

[0048] Figure 1 A cross-sectional schematic diagram of a valve for blocking and / or controlling fluid flow according to the present application is shown.

[0049] Figure 2 A cross-sectional schematic diagram of another embodiment of the valve for blocking and / or controlling fluid flow according to the present application is shown.

[0050] Figure 3 A cross-sectional schematic diagram showing a valve for blocking and / or controlling fluid flow according to the present application in another embodiment, and

[0051] Figure 4 A cross-sectional schematic diagram of another embodiment of a valve for blocking and / or controlling the flow of a fluid is shown. DETAILED DESCRIPTION

[0052] Figure 1A schematic cross-sectional view of a valve 24 for blocking and / or controlling the flow of a fluid according to the present application is shown. The valve 24 includes a valve body 26, which is configured to be movable between a fully closed position and a fully open position within a valve housing 25. Here, the valve body 26 is moved between the fully closed position and the fully open position in a translational manner by a lifting rod 6. In the fully closed position, the valve body 26 is in contact with a sealing seat 27, whereby the fluid cannot flow through the fluid housing 25. In the fully open position, the valve body 26 is arranged away from the sealing seat 27, whereby the fluid can flow through the fluid housing 25.

[0053] The valve body 26 is driven by the valve drive device 1. The valve drive device 1 includes a base element 2, for example, for fixing the valve 24 in the installation space. For example, the base element 2 is made of a suitable metal (such as aluminum) or a strong plastic. A lifting rod 6 for transmitting the driving force of the valve body 26 is installed in the base element 2. For the base element 2, the lifting rod 6 can only be movably installed in a translational manner along its longitudinal axis L. In other words, the lifting rod 6 can translate between a first end position and a second end position, wherein in the first end position the valve body 26 is completely separated from the sealing seat 27 and the fluid can flow to the maximum extent, and in the second end position the valve body 26 is in full contact with the sealing seat 27 and the fluid cannot flow. The movement between the first end position and the second end position is completely without rotation, only translation.

[0054] The spring element 28 is located between the control end 7 of the lifting rod 6 and the valve body 26. The spring element 28 can press the valve body 26 into the sealing seat 27 with a preset biasing force.

[0055] The rotor 3 rotating about the longitudinal axis L is arranged around the lifting rod 6 for driving the lifting rod 6. The rotor 3 includes one or more permanent magnets 5 in the circumferential direction and is driven to rotate by the stator 23. The transmission device 8 is arranged at the end of the lifting rod 6 opposite to the control end 7. The transmission device 8 is firmly connected to the rotor 3 through the external thread 20 and is used to transmit the rotation of the rotor 3 to the lifting rod 6. The rotation of the rotor 3 is transmitted to the lifting rod 6 by the transmission device 8, and the lifting rod 6 only moves in a translational manner without any rotational movement. In this way, there is no need for rotational decoupling between the lifting rod 6 and the valve body 26. In addition, there is no need for a sliding disk because the pure translational movement greatly reduces the amount of wear and there is no relative movement between the components. The rotation limiting device 9 is located in the cavity 18 of the rotor 3. The rotation limiting device 9 is used to limit the rotational movement of the rotor 3 between the first end stop and the second end stop. In this case, when the rotor 3 rotates to the first end stop, the lifting rod 6 is in a fully open end position. Correspondingly, when the rotor 3 rotates to the second end stop, the lifting rod 6 is in a fully closed end position. The rotation limiting device 9 is at least partially arranged radially between the lifting rod 6 and the rotor 3. The rotation limiting device 9 comprises a stop sleeve 13 and a driver 10. The driver 10 is arranged between the stop sleeve 13 and the rotor 3, wherein the driver 10 is connected to the rotor 3 in a slidable manner in the axial direction.

[0056] Therefore, the torque from the rotor 3 can be transmitted to the driver 10. The stop sleeve 13 includes a guide rail 14 arranged in a radial direction to guide the driver 10. Here, the driver 10 includes a first protrusion 11 that engages with the guide rail 14. Therefore, the torque is transmitted from the stator 23 to the rotor 3, and thus directly to the driver 10, wherein the driver 10 slides over the guide rail 14 of the stop sleeve 13. Thereby, the rotational motion of the rotor 3 is converted into the rotational motion of the driver 10 around the stop sleeve 13, and the driver 10 moves in the guide rail 14.

[0057] The axial movement of the lifting rod is achieved via the transmission device 8, while the rotation limiting device 9 together with the driver 10 and the stop sleeve 13 defines a first end position and a second end position of the lifting rod 6, wherein the rotor 3 always remains in an axially unchanged position.

[0058] The guide rail 14 has a first guide rail end 15 and a second guide rail end 16. The first guide rail end 15 corresponds to the first end stop of the rotor 3. The second guide rail end 16 corresponds to the second end stop of the rotor 3. Therefore, the fully extended position of the lifting rod 6 and the resulting fully closed valve position are determined by the specific arrangement of the first guide rail end 15. Due to the rotation of the rotor 3, the driver 10 slides over the guide rail 14 of the stop sleeve 13 and collides with the first end of the guide rail 15. This prevents the rotor 3 from continuing the rotational movement. Similarly, when the driver 10 slides over the guide rail 14 of the stop sleeve 13 and collides with the second guide rail end 16, the rotational movement of the rotor 3 in the opposite rotational direction is also blocked. Therefore, the fully retracted position of the lifting rod 6 and the resulting fully open valve position are determined by the specific arrangement of the second guide rail end 16. When the first end stop is reached, the valve 24 is completely closed, whereby the valve body 26 is completely located in the sealing seat 27. When the second end stop is reached, the valve 24 is completely open and the lifting rod 6 can no longer be retracted. Even if torque is applied, each end stop prevents further axial movement of the lifting rod 6 by a mechanical stop.

[0059] The stop sleeve 13 is connected to the base element 2 in a rotationally fixed (respectively non-rotating) manner. This is achieved by an anti-rotation mechanism 17 between the lifting rod 6 and the stop sleeve 13. The anti-rotation mechanism 17 has a finger 19 which engages axially with a groove in the base element 2 to achieve a precise fit. The lifting rod 6 and the stop sleeve 13 are connected to each other via the anti-rotation mechanism 17. Thus, the anti-rotation mechanism 17 is achieved between the lifting rod 6 and the stop sleeve 13.

[0060] The rotor 3 comprises a guide 4 in the form of an axially aligned groove. The driver 10 is guided radially inwardly on the one hand by a first projection 11 on the guide track 14 of the stop sleeve 13 and radially outwardly on the other hand by a second projection 12 on the guide 4 of the rotor 3. The driver 10 can therefore only be moved in the longitudinal direction relative to the rotor 3, whereby torque can only be transmitted from the rotor 3 to the driver 10.

[0061] Due to the rotation limiting device 9, when the valve drive 1 moves between the first end stop point and the second end stop point, the rotor 3 has no axial movement relative to the stator 2. Therefore, the torque transmission between the stator 23 and the rotor 3 is improved, so that the valve drive 1 can be designed to be very compact.

[0062] In the axial direction, an unfixed bearing element 29 is arranged between the permanent magnet 5 of the rotor 3 and the cover element 30. The bearing element 29 is designed in the circumferential direction and has a bearing function between the rotor 3 and the cover element 30 on the one hand. On the other hand, the unfixed bearing element 29 is configured to compensate for the length expansion of the rotor due to temperature differences. For example, if the different length expansion is not absorbed, the bearing element can also be designed as a component of the rotor.

[0063] Figure 2 A cross-sectional schematic diagram of another embodiment of a valve for blocking and / or controlling fluid flow according to the present application is shown. As in the previous embodiment, the valve 24 includes a valve body 26, which is configured to move between a fully closed position and a fully open position within a valve housing 25. Also in this embodiment, the valve body 26 is guided to move back and forth between the fully closed position and the fully open position in a translational manner by the lifting rod 6. In the fully closed position, the valve body 26 contacts the sealing seat 27, preventing the fluid from flowing through the fluid housing 25. In the fully open position, the valve body 26 is away from the sealing seat 27, allowing the fluid to flow through the fluid housing 25.

[0064] The valve body 26 is driven by a valve drive device 1 including a base element 2. A lifting rod 6 for transmitting the driving force of the valve body 26 is installed in the base element 2. The lifting rod 6 is installed relative to the base element 2 so that it can move along its longitudinal axis L only in a purely translational manner. Therefore, the lifting rod 6 performs a translational movement between a first end position and a second end position, in which the valve body 26 is completely separated from the sealing seat 27 and the fluid can flow to the maximum extent, and in which the valve body 26 is completely against the sealing seat 27 and the fluid cannot flow. In this embodiment, the movement between the first end position and the second end position is also completely free of rotation and is only a translation.

[0065] The spring element 28 is located between the control end 7 of the lifting rod 6 and the valve body 26. The spring element 28 can press the valve body 26 into the sealing seat 27 with a preset biasing force.

[0066] The rotor 3 rotating about the longitudinal axis L is arranged around the lifting rod 6 for driving the lifting rod 6. The rotor 3 includes one or more permanent magnets 5 in the circumferential direction and is driven to rotate by the stator 23.

[0067] The transmission 8 is located between the control end 7 of the lifting rod 6 and the end of the lifting rod 6 opposite to the control end 7. The transmission 8 is located directly between the end of the rotor 3 assigned to the base element 2 and the base element 2 itself. In this case, the lifting rod 6 only partially extends into the stop sleeve 13. The transmission 8 is firmly connected to the rotor 3 via the external thread 20 and is used to transmit the rotation of the rotor 3 to the lifting rod 6. Due to the transmission of the rotation of the rotor 3 to the lifting rod 6 via the transmission 8, the lifting rod 6 moves only in a translational manner without any rotational movement component. Therefore, it is not necessary to arrange a rotational decoupling between the lifting rod 6 and the valve body 26. In addition, a sliding disk is not required, because the pure translational movement greatly reduces the amount of wear and there is no relative movement between the components.

[0068] Compared with first embodiment, lifting rod 6 is designed to be significantly shorter, so whole valve drive device 1 can be designed to be more compact in longitudinal direction. Here, lifting rod 6 is only installed by control end 7, so can reduce manufacturing cost and tolerance requirement.

[0069] The rotation limiting device 9 is located in the cavity 18 of the rotor 3. The rotation limiting device 9 is used to limit the rotational movement of the rotor 3 between the first end stop point and the second end stop point. Its working method is functionally the same as Figure 1 The first embodiment in FIG. 1 is exactly the same. Here, when the rotor 3 rotates to the first end stop point, the lifting rod 6 is in the fully opened end position. Correspondingly, when the rotor 3 rotates to the second end stop point, the lifting rod 6 is in the fully closed end position. The rotation limiting device 9 is completely arranged in the rotor 3 in the radial direction. The rotation limiting device 9 includes a stop sleeve 13 and a driver 10. The driver 10 is arranged between the stop sleeve 13 and the rotor 3, wherein the driver 10 is connected to the rotor 3 in a slidable manner in the axial direction.

[0070] Therefore, also in this embodiment, torque transmission can be from the rotor 3 to the driver 10. The stop sleeve 13 includes a guide rail 14 arranged in the radial direction to guide the driver 10. The driver 10 includes a first protrusion 11 that engages with the guide rail 14. Therefore, the torque is transmitted from the stator 23 to the rotor 3, and thus directly to the driver 10, which slides over the guide rail 14 of the stop sleeve 13. Therefore, the rotational movement of the rotor 3 is converted into the rotational movement of the driver 10 around the stop sleeve 13, and the driver 10 moves in the guide rail 14.

[0071] The repeated description of the rotation limiting device is omitted and is completely referred to Figure 1 Description.

[0072] On the side of the rotor 3 opposite the transmission 8, the valve drive 1 comprises a cover element 30, which is connected to the stop sleeve 13 in a rotationally fixed manner via a toothing 31. The stop sleeve 13 is thus connected to the cover element 30 in a rotationally fixed manner. The toothing 31 is configured to be movable in the longitudinal direction, so that tolerance compensation can be performed in the longitudinal direction. For example, the toothing 31 can be realized by a torque-transmitting plug connection with the cover element 30.

[0073] In the axial direction, the bearing element 29 is located between the rotor 3 and the cover element 30. The bearing element 29 is formed in the circumferential direction and, on the one hand, has a bearing function between the rotor 3 and the cover element 30. On the other hand, the bearing element 29 is configured to compensate for material stress generated due to temperature differences.

[0074] Figure 3A cross-sectional schematic diagram of another embodiment of a valve 24 for blocking and / or controlling fluid flow according to the present application is shown. As in the previous embodiment, the valve 24 includes a valve body 26, which is configured to move between a fully closed position and a fully open position within a valve housing 25. Also in this embodiment, the valve body 26 is guided to move back and forth between the fully closed position and the fully open position in a translational manner by the lifting rod 6. In the fully closed position, the valve body 26 rests on the sealing seat 27, so that the fluid cannot flow through the fluid housing 25. The valve body 26 has an annular sealing element 37, which provides an improved seal between the valve body 26 and the sealing seat 27, thereby meeting higher leakage requirements. In the fully open position, the valve body 26 is away from the sealing seat 27, allowing the fluid to flow through the fluid housing 25.

[0075] In this embodiment, the valve body 26 is also driven by the valve drive device 1 including the base element 2. A lifting rod 6 for transmitting the driving force of the valve body 26 is installed in the base element 2. Relative to the base element 2, the lifting rod 6 moves only along its longitudinal axis L in a translational manner. A guide device 35 in the form of a guide disc is arranged in the base element 2. The lifting rod 6 extends through the guide disc, wherein a longitudinal profile 36 is arranged on the lifting rod 6. The longitudinal profile 36 is located in a radially arranged guide groove or guide tongue on the guide disc. Therefore, the lifting rod 6 can move between a first end position and a second end position in a purely translational manner, in which the valve body 26 is completely disengaged from the sealing seat 27 and the fluid can flow to the maximum extent, and in the second end position, the valve body 26 is completely against the sealing seat 27 and the fluid cannot flow. In this embodiment, the movement between the first end position and the second end position is also completely free of rotation and is only a translation.

[0076] The spring element 28 is located between the control end 7 of the lifting rod 6 and the valve body 26. The spring element 28 causes the valve body 26 to be pressed into the sealing seat 27 with a preset biasing force. The rotor 3 rotating about the longitudinal axis L is coaxially arranged with the lifting rod 6 for driving the lifting rod 6. The rotor 3 includes one or more permanent magnets 5 in its circumferential direction and is rotated by the stator 23.

[0077] The transmission 8 is located at the end of the lifting rod 6 opposite to the control end 7 of the lifting rod 6. The transmission 8 is designed as a metal component, and the rotor 3 is directly connected to the transmission 8. The roller bearing 32 for mounting the rotor 3 relative to the base element 2 is arranged between the flange-like extension of the transmission 8 and the base element 2. The transmission 8 thus has a dual function. On the one hand, the transmission 8 converts the rotational movement of the rotor 3 into a translational movement of the lifting rod 6. On the other hand, the transmission 8 supports the rotor 3 on the base element 2 via the roller bearing 32. The bearings are both radial and radial.

[0078] Compared with the first two embodiments, the lifting rod 6 is designed to be shorter, so the entire valve drive device 1 can be designed to be more compact in the longitudinal direction. The lifting rod 6 is only installed through the control end 7, so the manufacturing cost and tolerance requirements can be reduced.

[0079] The rotation limiting device 9 is located inside the rotor 3. The rotation limiting device 9 is used to limit the rotational movement of the rotor 3 between the first end stop point and the second end stop point. Its working mode is similar to Figure 1 and Figure 2 The first two embodiments are the same. Here, when the rotor 3 rotates to the first end stop point, the lifting rod 6 is in the fully open end position. Correspondingly, when the rotor 3 rotates to the second end stop point, the lifting rod 6 is in the fully closed end position. The rotation limiting device 9 is completely arranged in the rotor 3 in the radial direction. The rotation limiting device 9 includes a stop sleeve 13 and a driver 10. The driver 10 is arranged between the stop sleeve 13 and the rotor 3, wherein the driver 10 is connected to the rotor 3 in the axial direction in a sliding manner.

[0080] Therefore, in this embodiment, torque transmission can also be from the rotor 3 to the driver 10. The stop sleeve 13 includes a guide rail 14 arranged in the radial direction to guide the driver 10. Here, the driver 10 includes a first protrusion 11 that engages with the guide rail 14. Therefore, the torque is transmitted from the stator 23 to the rotor 3, and thus directly to the driver 10, and the driver 10 slides over the guide rail 14 of the stop sleeve 13. The rotational motion of the rotor 3 is converted into the rotational motion of the driver 10 around the stop sleeve 13, and the driver 10 moves in the guide rail 14.

[0081] The repeated description of the rotation limiting device is omitted and is completely referred to Figure 1 and Figure 2 Description.

[0082] The rotor 3, the permanent magnets 5, the rotation limiting device 9 and the transmission device 8 are located in the cover sleeve 33. Preferably, the cover sleeve 33 is manufactured by a deep drawing process. The cover sleeve 33 is firmly connected to the base element 2 and includes an internal sleeve extension 34 at the end opposite to the base element 2. The sleeve extension 34 is axially engaged with the stop sleeve 13, thereby preventing the stop sleeve 13 from rotating relative to the cover sleeve 33, thereby preventing the stop sleeve 13 from rotating relative to the base element 2.

[0083] An adapter 38 can be arranged between the sleeve extension 34 and the stop sleeve 13. The outer side of the adapter 38 has radially arranged teeth, which makes it easy for the adapter 38 to mesh with the inner tooth profile 39 of the stop sleeve 13. In the present embodiment, the form fit between the adapter 38 and the stop sleeve 13 is achieved by 60 teeth arranged in the circumferential direction. Alternatively, fewer or more teeth can be used. With the help of the adapter 38 and the inner tooth profile 39 of the stop sleeve, the valve drive 1 can be installed very easily and the end stop can be accurately adjusted relative to the valve seat, specifically wherein the components in the cover sleeve 33 can be easily inserted and accurately arranged.

[0084] Figure 4 A schematic cross-sectional view of another embodiment of a valve 24 for blocking and / or controlling the flow of a fluid is shown. Figure 4 The design of the valve drive device 1 of the valve 24 shown is similar to Figure 3 The valve drive 1 of the valves 24 shown is identical.

[0085] and Figure 3 The valve 24 shown is different. Figure 4 The valve 24 shown, in particular Figure 4 The valve body 26 of the valve 24 shown includes two sealing seats 27, namely a first sealing seat 27.1 and a second sealing seat 27.2. Figure 4 In the position shown, the lifting rod 6 is in the second end position. This can be seen from the fact that the valve body 26 has completely moved to the right and rests on the first sealing seat 27.1 in a fluid-tight manner. Figure 4 In the illustration of , the valve body 26 is in a first fully closed position.

[0086] When the valve driving device 1 drives the valve 24, specifically the valve body 26, the lifting rod 6 moves from Figure 4 The second end position shown is moved to the first end position. To this end, the lifting rod 6 is moved axially to the left relative to the longitudinal axis L. The movement of the lifting rod 6 causes the valve body 26 to also move axially to the left relative to the longitudinal axis L. The valve body 26 moves to the left until the valve body 26 engages with the sealing element 37 on the second sealing seat 27.2 until it forms a fluid-tight contact with the second sealing seat 27.2. At this time, the valve body 26 is in the second fully closed position.

[0087] The valve body 26 and the support ring 40 together form a cavity 42, which will also be referred to as the spring cavity 42 below. The support ring 40 is configured in such a way that it includes a passage for the lifting rod 6. In other words, the lifting rod 6 passes through the passage in the support ring 40 so that the lifting rod 6 extends into the spring cavity 42.

[0088] A spring element 28 is disposed in the spring chamber 42. The spring element 28 is axially arranged between the lifting rod 6 and the valve body 2. The left end of the spring element 28 is supported on the left force transmission device 41, specifically, the first force transmission device 41. The right end of the spring element 28 is supported on the right force transmission device 41, specifically, the second force transmission device 41.

[0089] exist Figure 4 In the position shown, the lifting rod 6 presses the left force transmission device 41 with its control end 7, so that the left force transmission device 41 is pushed to the right. This causes the spring element 28 to be compressed to the right. The elastic force generated by the spring element 28 correspondingly presses the right force transmission device 41 toward the valve body 26. Therefore, under the elastic force of the spring element 28, the valve body 26 is pressed toward the first sealing seat 27.1. When the lifting rod 6 is moved from Figure 4 When the position shown starts to move to the left, the lifting rod 6 pushes the right force transmission device 41 to the left with its right end. This causes the spring element 28 to be compressed to the left. The elastic force generated by the spring element 28 pushes the left force transmission device 41 to the left accordingly. However, since the left force transmission device 41 can no longer be supported on the control end 7 of the lifting rod 6 (the control end 7 has moved to the left with the lifting rod 6), the left force transmission device 41 is pressed on the support ring 40. The support ring 40 is then firmly connected to the valve body 26. Therefore, the valve body 26 moves to the left under the elastic force of the spring element 28 until the valve body 26 is pressed against the second sealing seat 27.2. The stroke ends when the end stop of the guide block is reached. Depending on the tolerance grade, the spring will be more or less slightly offset, but the range of force variation is very small. The closing force of the sealing seat is determined and varies only within a very small range.

[0090] Reference numerals list

[0091]

[0092]

Claims

1. A valve driving device (1), comprising: A base element (2); a lifting rod (6) for driving the valve body (26), wherein the lifting rod (6) is movable in a translational and non-rotational manner along its longitudinal axis (L) relative to the base element (2) between a first end position and a second end position different from the first end position; a rotor (3) which rotates about a longitudinal axis (L) to drive a lifting rod (6), wherein the rotational movement of the rotor (3) is converted into a translational and non-rotational movement of the lifting rod (6) by a transmission (8); and A rotation limiting device (9) is used to limit the rotational movement of the rotor (3) between a first end stop point and a second end stop point, wherein When the rotor (3) rotates to a first end stop point, the lifting rod (6) is in a first end position, and when the rotor (3) rotates to a second end stop point, the lifting rod (6) is in a second end position.

2. The valve drive device (1) according to claim 1, characterized in that: The rotation limiting device (9) is at least partially arranged radially between the lifting rod (6) and the rotor (3).

3. The valve drive device (1) according to claim 1 or 2, characterized in that: The rotation limiting device (9) comprises a stop sleeve (13) and a drive (10), wherein the drive (10) is arranged between the stop sleeve (13) and the rotor (3), wherein the drive (10) is connected to the rotor (3) in a rotationally fixed and slidingly movable manner, and wherein the stop sleeve (13) comprises a guide rail (14) for guiding the drive (10).

4. The valve drive device (1) according to claim 3, characterized in that: The rotational movement of the rotor (3) causes the driver (10) to rotate about the stop sleeve (13), and the driver (10) moves in the guide rail (14).

5. The valve drive device (1) according to claim 3 or 4, characterized in that: The guide rail (14) is configured as a spiral groove (14) in the stop sleeve (13), and the driver (10) comprises a first protrusion (11) which is arranged to engage with the spiral groove (14) of the stop sleeve (13).

6. The valve drive device (1) according to any one of claims 3 to 5, characterized in that: The guide rail (14) has a first guide rail end (15) and a second guide rail end (16), the first guide rail end (15) defining a first end stop of the rotor (3), and the second guide rail end (16) defining a second end stop of the rotor (3).

7. The valve drive device (1) according to any one of claims 3 to 6, characterized in that: The stop sleeve (13) is connected to the base element (2) in a rotationally fixed manner.

8. The valve drive device (1) according to any one of claims 3 to 7, characterized in that: The lifting rod (6) is arranged in the base element (2) in a rotationally fixed and slidingly movable manner.

9. The valve drive device (1) according to any one of claims 3 to 8, characterized in that: The rotor (3) comprises a guide (4), wherein the drive (10) is connected to the rotor (3) via the guide (4) in a rotationally fixed and slidingly movable manner.

10. The valve drive device (1) according to any one of the preceding claims, characterized in that The lifting rod (6) includes a control end (7) for controlling the valve body (26) in the longitudinal direction, and the transmission device (8) is arranged at an end of the lifting rod (6) opposite to the control end (7).

11. The valve drive device (1) according to any one of the preceding claims, characterized in that The lifting rod (6) is mounted so that it can be biased relative to the valve body (26) to be controlled.

12. The valve drive device (1) according to any one of the preceding claims, characterized in that The valve driving device (1) comprises a stepping motor (22), wherein the stepping motor (22) comprises a stator (23) and a rotor (3), the stator (23) at least partially encloses the rotor (3), and the rotational movement of the rotor (3) can be controlled by the stator (23).

13. The valve drive device (1) according to claim 12, characterized in that: During rotational movement of the rotor (3) between the first end stop point and the second end stop point, the axial orientation of the stator (23) relative to the rotor (3) is configured to remain unchanged.

14. The valve drive device (1) according to any one of claims 1-6, 8-9, 11-13, characterized in that: The lifting rod (6) includes a control end (7) for controlling the valve body (26) in the longitudinal direction, and the transmission device (8) is arranged between the control end (7) and the stop sleeve (13).

15. The valve drive device (1) according to claim 14, characterized in that: The valve drive device (1) comprises a cover element (30) which is connected to a stop sleeve (13) in a rotationally fixed manner via a toothing portion (31).

16. The valve drive device (1) according to any one of the preceding claims, characterized in that The rotor (3) is mounted on the base element (2) via roller bearings (32).

17. The valve drive device (1) according to any one of the preceding claims, characterized in that The valve drive (1) comprises a deep-drawn cover sleeve (33) which is firmly connected to the base element (2), wherein the rotor (3) and the rotation limiting device (9) are preferably completely accommodated in the cover sleeve (33).

18. The valve drive device (1) according to claim 17, characterized in that: The cover sleeve (33) comprises a sleeve extension (34) for engaging with the stop sleeve (13), wherein the sleeve extension (34) is configured to fix the stop sleeve (13) at least in a rotationally fixed manner relative to the cover sleeve (33).

19. The valve drive device (1) according to any one of the preceding claims, characterized in that The base element (2) comprises a guide device (35), wherein the guide device (35) is configured to axially guide the lifting rod (6) along a longitudinal profile (36).

20. A valve (24) for blocking and / or controlling the flow of a fluid, the valve (24) comprising: a valve body (26) configured to move between a fully closed position and a fully open position within the valve housing (25); as well as The valve drive (1) according to any one of the preceding claims, wherein the position of the valve body (26) is controlled by a lifting rod (6) of the valve drive (1).

21. The valve (24) according to claim 20, characterized in that The valve body (26) comprises at least one sealing element (37), wherein the sealing element (37) is configured to bear against a sealing seat (27) of the valve housing (25) in a fluid-tight manner when the valve body (26) is in the fully closed position.

22. The valve (24) according to claim 20 or 21, characterized in that The valve housing (25) comprises a first sealing seat (27.1) and a second sealing seat (27.2), and the valve body (26) can move back and forth between the first sealing seat (27.1) and the second sealing seat (27.2).

23. The valve (24) according to any one of claims 20 to 22, characterized in that The valve (24) comprises a spring element (28), wherein the spring element (28) is arranged axially with respect to the longitudinal axis (L) between the lifting rod (6) and the valve body (26).

24. The valve (24) according to claim 23 in combination with claim 22, characterized in that The spring element (28) is configured to press the valve body (26) into the first sealing seat (27.1) and / or the second sealing seat (27.2).

25. The valve (24) according to claim 23 or 24, characterized in that The spring element (28) is connected via a force transmission device (41) and, depending on the position of the lifting rod (6), to the lifting rod (6) or to the valve body (26) in a force-transmitting manner.

26. A method for manufacturing a valve drive device (1) according to any one of claims 1 to 19, the method comprising the following steps: Place the stop sleeve (13) on the lifting rod (6). The driver (10) is arranged on the guide rail (14) of the stop sleeve (13). Place the rotor (3) on the stop sleeve (13) and insert the driver (10) into the guide (4), and Fasten the transmission device (8) to the lifting rod (6).

27. The method according to claim 26, characterized in that The lifting rod (6) is biased in the axial direction.

Images