A double-acting oil cylinder rotary switching valve

Abstract

The present invention relates to the technical field of hydraulic control equipment, and specifically to a double-acting cylinder rotary switching valve. The double-acting cylinder rotary switching valve integrates a flow sensor, and a plurality of position points are arranged on the cylinder bellows loader for monitoring the vibration information of the cylinder bellows loader during the switching process of the switching valve. The switching valve adjustment module first quantifies the position change of the position point between the switching processes. The degree of vibration intensity can be further obtained in combination with the degree of vibration change. Then, the rotation margin adjustment coefficient is obtained. By adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient, the present invention can adaptively smooth the flow change, reduce mechanical stress and wear, extend the life of the equipment and improve the safety of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control equipment, and in particular to a double-acting oil cylinder rotary switching valve. Background Art

[0002] The double-acting cylinder rotary switching valve is an important hydraulic control device used to manage the forward and reverse movement of the double-acting cylinder. It achieves efficient switching of the hydraulic oil flow direction through precise valve core design and high-strength seals. The valve can be widely used in industrial automation, engineering machinery, as well as shipbuilding and aviation fields to provide reliable hydraulic control. This switching valve has the advantages of high-precision control and fast response. By optimizing the flow channel design, it ensures the accuracy and consistency of the equipment's movement. It has strong durability and can work stably for a long time under high pressure and high load conditions. In addition, the switching valve supports manual, electric or servo control methods, has high flexibility and adaptability, and effectively improves the overall efficiency of the system and the operating performance of the equipment.

[0003] Existing double-acting cylinder rotary switching valves may face a series of challenges in terms of stability and precision control in high-pressure and high-flow environments. Seals and valve cores are prone to wear under high-pressure conditions, resulting in hydraulic oil leakage and unstable flow control. In addition, valve switching may experience response delays, affecting the system's immediate response capabilities. The heat generated by high pressure will also cause the valve body and valve core to expand and contract, changing the material size, thereby affecting the sealing effect and operating accuracy. The significant vibration and noise caused by large flows interfere with the stable operation of the system and may cause components to loosen or shift in position. Summary of the invention

[0004] In order to solve the technical problem that the double-acting oil cylinder rotary switching valve causes quality problems in the hydraulic device due to high-pressure operation, the purpose of the present invention is to provide a double-acting oil cylinder rotary switching valve, and the technical solution adopted is as follows:

[0005] The present invention proposes a double-acting oil cylinder rotation switching valve, wherein the switching valve is installed at the oil inlet and oil return port of the oil cylinder bellows loader, and a flow sensor is also installed at the port of the switching valve, which is used to monitor the unidirectional flow in the oil cylinder bellows loader during each switching process, and transmit the data to the switching valve adjustment module; a plurality of position points are arranged on the oil cylinder bellows loader; a vibration sensor is installed at the position point, which is used to monitor the vibration change degree of the position point in each switching process, and transmit the data to the switching valve adjustment module; the switching valve adjustment module is used to process the received data and adjust the rotation margin of the switching valve;

[0006] The data processing method of the switching valve adjustment module includes:

[0007] According to the coordinate changes of the position points between adjacent switching processes of the switching valve, the deformation influence degree of each position point in each switching process is obtained;

[0008] The vibration intensity is obtained according to the deformation influence degree and vibration change degree of each position point in each switching process; the switching stability of the switching valve in each switching process is obtained according to the difference in vibration intensity of each position point between adjacent switching processes;

[0009] According to the difference in switching stability and unidirectional flow rate between adjacent switching processes, a rotation margin adjustment coefficient of the switching valve is obtained, and the rotation margin of the switching valve is adjusted according to the rotation margin adjustment coefficient.

[0010] Furthermore, the cylinder bellows loader comprises: a first end plate and a second end plate, and a metal bellows is installed between the first end plate and the second end plate.

[0011] Furthermore, the position points are evenly arranged on the corrugated tube.

[0012] Furthermore, the method for obtaining the deformation influence degree includes:

[0013] When the cylinder bellows is in a stationary state, the center of gravity position is determined based on the coordinates of all position points;

[0014] For each switching process, the center of gravity influence distance of each position point based on the center of gravity position is obtained; the distance difference of the center of gravity influence distance of each position point between adjacent switching processes is obtained, and the distance difference is normalized to obtain the deformation influence degree.

[0015] Furthermore, the method for obtaining the center of gravity influence distance includes:

[0016] When the cylinder bellows is in a stationary state, take the bottom vertex of the cylinder bellows loader as the origin, set the x-axis perpendicular to the plane of hydraulic oil flow, the y-axis parallel to the flow direction of the hydraulic oil, and the z-axis vertically upward to construct a three-dimensional coordinate system. On the yoz plane, the distance between the position point and the center of gravity position is used as the center of gravity influence distance.

[0017] Furthermore, the vibration severity is the ratio of the vibration change degree of the position point in each switching process to the deformation influence degree.

[0018] Furthermore, the method for obtaining the switching stability includes:

[0019] In a switching process, for each position point, the difference in vibration severity between the position point and the previous adjacent switching process is obtained; the average values ​​of the vibration severity differences of all position points are negatively correlated and normalized to obtain the switching stability in the switching process.

[0020] Furthermore, the method for obtaining the rotation margin adjustment coefficient includes:

[0021] For a real-time switching process, all switching processes before the real-time switching process are taken as historical switching processes; the switching stability difference between adjacent historical switching processes constitutes a switching stability difference sequence, and the one-way flow difference between adjacent historical switching processes constitutes a one-way flow difference sequence; for elements at the same position in the switching stability difference sequence and the one-way flow difference sequence, the product of the switching stability difference and the one-way flow difference is taken as the initial adjustment confidence; the average value of all initial adjustment confidences is taken as the adjustment confidence of the real-time switching process; the average adjustment confidence corresponding to all historical switching processes is obtained, the difference between the adjustment confidence of the real-time switching process and the average adjustment confidence is normalized, and the rotation margin adjustment coefficient is obtained.

[0022] Further, adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient includes:

[0023] The ratio of the rotation margin adjustment coefficient to the preset minimum adjustment accuracy is rounded down to obtain an adjustment multiple, the adjustment multiple is multiplied by the minimum adjustment accuracy to obtain an adjustment margin, the preset maximum rotation control step is subtracted from the adjustment margin to obtain a rotation control step; the rotation margin of the switching valve is controlled according to the rotation control step.

[0024] Furthermore, the minimum adjustment accuracy is set to 0.1, and the maximum rotation control step is set to 3 degrees.

[0025] The present invention has the following beneficial effects:

[0026] The double-acting oil cylinder rotary switching valve proposed in the present invention integrates a flow sensor, and multiple position points are set on the oil cylinder bellows loader to monitor the vibration information of the oil cylinder bellows loader during the switching process of the switching valve. The switching valve adjustment module first quantifies the position change of the position point between the switching processes, and the obtained deformation influence degree can characterize the change influence of the shape of the equipment when the switching process changes. The vibration intensity can be further obtained in combination with the vibration change degree. The smaller the difference in vibration intensity between adjacent switching processes, the greater the switching stability of the switching valve, and the less the switching valve needs to be adjusted. If the switching stability changes significantly and the unidirectional flow also changes significantly, it means that the working environment of the switching valve at this time is an obvious high-pressure environment, and a larger rotation margin adjustment is required, thereby obtaining the rotation margin adjustment coefficient. By adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient, the flow change can be adaptively smoothed, mechanical stress and wear can be reduced, the equipment life can be extended, and the equipment safety can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of a double-acting oil cylinder rotary switching valve provided by one embodiment of the present invention applied to an oil cylinder bellows loader;

[0029] Figure 2 A schematic diagram of location point selection provided by an embodiment of the present invention;

[0030] Figure 3 A flow chart of a data processing method of a switching valve adjustment module provided by an embodiment of the present invention.

[0031] Among them, 1. oil return port; 2. oil inlet port; 3. first end plate; 4. second end plate; 5. bellows; 6. switching valve. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a double-acting cylinder rotary switching valve proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0033] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0034] The specific scheme of a double-acting oil cylinder rotary switching valve provided by the present invention is described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 , which shows a schematic structural diagram of a double-acting oil cylinder rotary switching valve provided by an embodiment of the present invention applied to an oil cylinder bellows loader, such as Figure 1 As shown, the switching valve 6 proposed in the embodiment of the present invention is installed at the oil inlet 2 and the oil return port 1 of the cylinder bellows loader. The cylinder bellows loader includes a first end plate 3 and a second end plate 4, and a metal bellows 5 is installed between the first end plate 3 and the second end plate 4.

[0036] The switching valve in the embodiment of the present invention is also integrated with a flow sensor and a switching valve adjustment module, wherein the flow sensor is installed at the port of the switching valve to monitor the unidirectional flow in the cylinder bellows loader during each switching process and transmit the data to the switching valve adjustment module. In addition, multiple position points are provided on the cylinder bellows loader, and vibration sensors are installed at the position points. The vibration sensors can be used to monitor the vibration change data of the position points during each switching process and transmit the data to the switching valve adjustment module.

[0037] In the embodiment of the present invention, the flow sensor is installed on the pipeline at the port of the switching valve, and the distance from the port of the switching valve can be set to 5 to 10 times the pipe diameter to reduce flow disturbance. The sensor needs to be calibrated before acquiring data. By setting the sensor with a known flow, the output signal is corrected to ensure that the flow reading is accurate. The acquisition frequency of the flow sensor in the embodiment of the present invention is set to 10 Hz, and the average value of the flow data collected during the switching process is used as the unidirectional flow of the switching process. This process can efficiently and accurately obtain the unidirectional flow information of the double-acting cylinder rotary switching valve, providing basic support for further analysis and optimization.

[0038] It should be noted that, in the embodiment of the present invention, the vibration sensor directly collects real-time vibration data of the location point. For a switching process, the average value of the vibration data under the switching process and the average value of the vibration data of the previous switching process are used as the vibration change data under the switching process.

[0039] In one embodiment of the present invention, see Figure 2 , which shows a schematic diagram of position point selection provided by an embodiment of the present invention. In the embodiment of the present invention, the position points are evenly arranged on the corrugated tube. Figure 2The middle dotted box is the location point selection area. Six location points are evenly selected in the location point selection area.

[0040] It should be noted that after selecting the position point, the coordinate change of the position point can be monitored by visual means, or by installing an additional sensor at the position point, or by existing technologies such as X-ray transmission. The specific means of obtaining the coordinate information of the position point are technical means well known to those skilled in the art and will not be described in detail here.

[0041] In hydraulic equipment used for testing the performance of building materials, such as compression and shear testing machines, the double-acting cylinder rotary switching valve is a pressure control component that directly acts on the hydraulic oil, and can be regarded as a stress effect control directly applied to the material. Therefore, the working stability of the switching valve needs to be ensured during operation. Because the switching valve is made of uniform material, the vibration of the cylinder bellows loader is more caused by the changes in the flow and pressure control-related components passing through the rotating switching valve. Therefore, the degree of vibration change of the position point on the cylinder bellows loader and the displacement of the position point can effectively characterize the vibration of the equipment. And further combined with the unidirectional flow data in the switching valve, the stability of the switching valve during the switching process can be accurately quantified. Therefore, the switching valve adjustment module in the embodiment of the present invention receives the unidirectional flow data, vibration change degree data, and coordinate data of the position point collected by the sensor, and adjusts the rotation margin of the switching valve by processing the received data. By adjusting the flow automatically and adaptively, the changes in the hydraulic device are monitored and dynamically responded to in real time, ensuring that the hydraulic device maintains the optimal flow state under various working conditions, thereby optimizing the overall performance and improving work efficiency. By controlling the rotation margin of the switching valve, flow changes can be smoothly transitioned, mechanical stress and wear can be reduced, equipment life can be extended, and safety can be improved. Adaptive control can also simplify operating procedures, reduce manual intervention, while maintaining the continuity and consistency of the production process and improving the quality of the final product. In addition, by dynamically adjusting the flow, resource waste can be effectively avoided, energy saving and consumption reduction can be achieved, and operating costs can be reduced, which brings multiple beneficial effects in optimizing system performance, improving safety, simplifying operations, and improving production quality. Figure 3 , which shows a flow chart of a data processing method of a switching valve adjustment module provided by an embodiment of the present invention, the method comprising:

[0042] Step S1: According to the coordinate changes of the position points between adjacent switching processes of the switching valve, the deformation influence degree of each position point in each switching process is obtained.

[0043] The vibration of the equipment will cause displacement or even deformation of the equipment. The greater the vibration, the more obvious the deformation of the equipment. Due to the material characteristics of the cylinder bellows, the coordinates of the position points in space will change. The more drastic the coordinate change, the more obvious the vibration of the equipment between adjacent switching processes. Therefore, based on the coordinate change of the position points between adjacent switching processes of the switching valve, the degree of deformation influence of each position point in each switching process can be obtained.

[0044] Preferably, in one embodiment of the present invention, the method for obtaining the degree of deformation influence includes:

[0045] When the cylinder bellows is in a stationary state, the center of gravity is determined according to the coordinates of all position points. It should be noted that since the method of determining the center of gravity according to the coordinates of the position points is a technical means well known to those skilled in the art, it will not be described in detail here.

[0046] Because the center of gravity position is obtained when the cylinder bellows is in a stationary state, that is, the equipment does not generate vibration and deformation in the stationary state, the center of gravity position can be used as a reference point to evaluate the coordinate changes of the position point. For each switching process, the center of gravity influence distance of each position point based on the center of gravity position is obtained; the distance difference of the center of gravity influence distance of each position point between adjacent switching processes is obtained. The greater the distance difference, the more obvious the deformation caused by the vibration, and the greater the degree of deformation influence. The distance difference is normalized to obtain the degree of deformation influence. It should be noted that because the embodiment of the present invention is a real-time automatically controlled switching valve, the data between adjacent switching processes refers to the data between a switching process and the previous switching process.

[0047] As an example, in an embodiment of the present invention, the ratio of the distance difference to the average value of the center of gravity influence distance under all switching processes is mapped through a normalization function to obtain a normalized result. The normalization function can be a hyperbolic tangent function, a sigmoid function, etc., which will not be described in detail here. The operation of the ratio is to perform initial normalization using the average value as reference data.

[0048] Furthermore, the method for obtaining the center of gravity influence distance includes:

[0049] When the cylinder bellows is stationary, take the bottom vertex of the cylinder bellows loader as the origin, set the x-axis perpendicular to the plane of hydraulic oil flow, the y-axis parallel to the flow direction of hydraulic oil, and the z-axis vertically upward to construct a three-dimensional coordinate system. It should be noted that because the three-dimensional coordinate system is constructed when the cylinder bellows is stationary, when the cylinder bellows is in working condition, although the equipment is displaced due to vibration, the three-dimensional coordinate system is fixed, so the center of gravity influence distance can be determined based on the three-dimensional coordinate system. On the yoz plane, the distance between the position point and the center of gravity position is taken as the center of gravity influence distance.

[0050] Step S2: Obtain the vibration severity according to the degree of deformation influence and vibration change of each position point in each switching process; obtain the switching stability of the switching valve in each switching process according to the difference in vibration severity of each position point between adjacent switching processes.

[0051] For the equipment, the smaller the deformation influence, the greater the vibration change degree obtained by monitoring, indicating that the equipment has obvious high-frequency vibration during the switching process, and the greater the vibration intensity. Therefore, the vibration intensity can be obtained according to the deformation influence degree and vibration change degree of each position point during each switching process.

[0052] Preferably, in one embodiment of the present invention, the vibration severity is the ratio of the vibration change degree of the position point in each switching process to the deformation influence degree.

[0053] Because the embodiment of the present invention is a real-time automatic control switching valve, for the cylinder bellows loader in the double-acting oil cylinder, the working state at the initial operation is generally relatively stable. Therefore, for the real-time switching process, the embodiment of the present invention can obtain the switching stability of the switching valve during the switching process by analyzing the difference in the vibration intensity of each position point between adjacent switching processes. That is, between adjacent switching processes, the vibration intensity should be a small value, and there will be no large difference in the vibration intensity between a switching process and the previous switching process, which means that the current switching process maintains a stable operation state.

[0054] Preferably, in one embodiment of the present invention, the method for acquiring switching stability includes:

[0055] In a switching process, for each position point, the difference in vibration severity between the position point and the previous adjacent switching process is obtained; the average value of the difference in vibration severity of all position points is negatively correlated and normalized to obtain the switching stability in the switching process. In the embodiment of the present invention, the opposite number of the average value is used as the power of an exponential function with a natural constant as the base to obtain the result of negative correlation mapping and normalization.

[0056] Step S3: according to the difference in switching stability and unidirectional flow rate between adjacent switching processes, the rotation margin adjustment coefficient of the switching valve is obtained, and the rotation margin of the switching valve is adjusted according to the rotation margin adjustment coefficient.

[0057] Switching stability is an analysis of the stability of the switching valve under vibration conditions, especially under high pressure and large flow conditions. Its tiny vibration changes will affect the operation or stability of the actual equipment. Therefore, more variation margins should be given through refined control to ensure the control stability accuracy of the switching valve during the overall equipment operation. Therefore, combined with the change of the one-way flow rate, the rotation margin adjustment coefficient of the switching valve is obtained according to the difference in switching stability and one-way flow rate between adjacent switching processes. If the switching stability changes significantly between adjacent switching processes and the one-way flow rate also changes significantly, it means that the higher the pressure of the switching valve, the more margin adjustment is needed. Therefore, the rotation margin of the switching valve can be adjusted according to the rotation margin adjustment coefficient to achieve adaptive and real-time adjustment of the switching valve.

[0058] Preferably, in one embodiment of the present invention, the method for obtaining the rotation margin adjustment coefficient includes:

[0059] For the real-time switching process, all the switching processes before the real-time switching process are taken as the historical switching process. The embodiment of the present invention aims to use the data in the historical switching process as reference data to analyze the working state of the switching valve in the entire historical time period.

[0060] The switching stability difference between adjacent historical switching processes constitutes a switching stability difference sequence, and the one-way flow difference between adjacent historical switching processes constitutes a one-way flow difference sequence. For the elements at the same position in the switching stability difference sequence and the one-way flow difference sequence, the product of the switching stability difference and the one-way flow difference is used as the initial adjustment confidence. That is, the smaller the switching stability difference is, the less the switching stability of the switching valve has changed significantly during the historical time period, and the less the switching valve needs to be adjusted, and the smaller the initial adjustment confidence is; similarly, the smaller the one-way flow difference is, the smaller the change in the working content of the switching valve is, the more stable the working state is, and the smaller the initial adjustment confidence is.

[0061] The average value of all initial adjustment confidences is taken as the adjustment confidence of the real-time switching process. That is, the adjustment confidence of the real-time switching process represents the working state of the switching valve under the real-time switching process. The average adjustment confidence corresponding to all historical switching processes is obtained, and the average adjustment confidence is the overall working state under the historical switching process. The difference between the adjustment confidence of the real-time switching process and the average adjustment confidence is normalized to obtain the rotation margin adjustment coefficient. The larger the difference, the greater the difference between the working state of the switching valve under the real-time switching process and the overall working state under the historical switching process, which means that the switching valve under the real-time switching process needs more margin adjustment, and the larger the rotation margin adjustment coefficient.

[0062] It should be noted that, in the embodiment of the present invention, the normalization method of the rotation margin adjustment coefficient selects range normalization for normalization.

[0063] Further, adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient includes:

[0064] The ratio of the rotation margin adjustment coefficient to the preset minimum adjustment precision is rounded down to obtain an adjustment multiple, the adjustment multiple is multiplied by the minimum adjustment precision to obtain an adjustment margin, the preset maximum rotation control step is subtracted from the adjustment margin to obtain a rotation control step; the rotation margin of the switching valve is controlled according to the rotation control step. In one embodiment of the present invention, the minimum adjustment precision is set to 0.1, and the maximum rotation control step is set to 3 degrees.

[0065] It should be noted that the rotation margin adjustment of the switching valve in the embodiment of the present invention is real-time, that is, a certain adjustment is performed during each switching process to ensure that the entire working time period is relatively stable and to avoid working abnormalities.

[0066] In summary, the double-acting oil cylinder rotary switching valve of the embodiment of the present invention integrates a flow sensor, and multiple position points are set on the oil cylinder bellows loader to monitor the vibration information of the oil cylinder bellows loader during the switching process of the switching valve. The switching valve adjustment module first quantifies the position change of the position point between the switching processes, and the obtained deformation influence degree can characterize the influence of the change of the shape of the equipment when the switching process changes. The vibration intensity can be further obtained in combination with the vibration change degree. The smaller the difference in the vibration intensity between adjacent switching processes, the greater the switching stability of the switching valve, and the less the switching valve needs to be adjusted. If the switching stability changes significantly and the unidirectional flow also changes significantly, it means that the working environment of the switching valve at this time is an obvious high-pressure environment, and a larger rotation margin adjustment is required to obtain the rotation margin adjustment coefficient. By adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient, the flow change can be adaptively smoothed, mechanical stress and wear can be reduced, the life of the equipment can be extended, and the safety of the equipment can be improved.

[0067] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0068] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A double-acting cylinder rotary switching valve, characterized in that: The switching valve is installed at the oil inlet and oil return port of the cylinder bellows loader, and a flow sensor is also installed at the port of the switching valve to monitor the unidirectional flow in the cylinder bellows loader during each switching process and transmit the data to the switching valve adjustment module; multiple position points are set on the cylinder bellows loader; the position points are installed with vibration sensors to monitor the vibration change degree of the position points in each switching process and transmit the data to the switching valve adjustment module; The switching valve adjustment module is used to process the received data and adjust the rotation margin of the switching valve; The data processing method of the switching valve adjustment module includes: According to the coordinate changes of the position points between adjacent switching processes of the switching valve, the deformation influence degree of each position point in each switching process is obtained; The vibration intensity is obtained according to the deformation influence degree and vibration change degree of each position point in each switching process; the switching stability of the switching valve in each switching process is obtained according to the difference in vibration intensity of each position point between adjacent switching processes; According to the difference in switching stability and the difference in unidirectional flow between adjacent switching processes, a rotation margin adjustment coefficient of the switching valve is obtained, and the rotation margin of the switching valve is adjusted according to the rotation margin adjustment coefficient; The method for obtaining the deformation influence degree includes: When the cylinder bellows is in a stationary state, the center of gravity position is determined based on the coordinates of all position points; For each switching process, obtaining the gravity center influence distance of each position point based on the gravity center position; obtaining the distance difference of the gravity center influence distance of each position point between adjacent switching processes, and normalizing the distance difference to obtain the deformation influence degree; The method for obtaining the center of gravity influence distance includes: When the cylinder bellows is in a stationary state, the bottom vertex of the cylinder bellows loader is taken as the origin, the x-axis is set to be perpendicular to the plane where the hydraulic oil flows, the y-axis is parallel to the flow direction of the hydraulic oil, and the z-axis is vertically upward, so as to construct a three-dimensional coordinate system. On the yoz plane, the distance between the position point and the center of gravity position is taken as the center of gravity influence distance; The method for obtaining the switching stability includes: In a switching process, for each position point, the difference in vibration severity between the position point and the previous adjacent switching process is obtained; the average values ​​of the vibration severity differences of all position points are negatively correlated and normalized to obtain the switching stability in the switching process; The method for obtaining the rotation margin adjustment coefficient includes: For a real-time switching process, all switching processes before the real-time switching process are taken as historical switching processes; the switching stability difference between adjacent historical switching processes constitutes a switching stability difference sequence, and the one-way flow difference between adjacent historical switching processes constitutes a one-way flow difference sequence; for elements at the same position in the switching stability difference sequence and the one-way flow difference sequence, the product of the switching stability difference and the one-way flow difference is taken as the initial adjustment confidence; the average value of all initial adjustment confidences is taken as the adjustment confidence of the real-time switching process; the average adjustment confidence corresponding to all historical switching processes is obtained, the difference between the adjustment confidence of the real-time switching process and the average adjustment confidence is normalized, and the rotation margin adjustment coefficient is obtained.

2. A double-acting cylinder rotary switching valve according to claim 1, characterized in that: The oil cylinder bellows loader comprises: a first end plate and a second end plate, and a metal bellows is installed between the first end plate and the second end plate.

3. A double-acting cylinder rotary switching valve according to claim 2, characterized in that: The position points are evenly arranged on the corrugated tube.

4. A double-acting cylinder rotary switching valve according to claim 1, characterized in that: The vibration severity is the ratio of the vibration change degree of the position point in each switching process to the deformation influence degree.

5. A double-acting cylinder rotary switching valve according to claim 1, characterized in that: The step of adjusting the rotation margin of the switching valve according to the rotation margin adjustment coefficient includes: The ratio of the rotation margin adjustment coefficient to the preset minimum adjustment accuracy is rounded down to obtain an adjustment multiple, the adjustment multiple is multiplied by the minimum adjustment accuracy to obtain an adjustment margin, the preset maximum rotation control step is subtracted from the adjustment margin to obtain a rotation control step; the rotation margin of the switching valve is controlled according to the rotation control step.

6. A double-acting cylinder rotary switching valve according to claim 5, characterized in that: The minimum adjustment accuracy is set to 0.1, and the maximum rotation control step is set to 3 degrees.

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