Hydraulic hold-down system for a resonance breaking device and method of breaking

Abstract

This application relates to the field of engineering machinery technology, and discloses a hydraulic clamping system and crushing method for a resonant crushing device, comprising: two piston cylinders; a two-way proportional valve, which obtains oil from a metering pump, supplies oil to the two piston cylinders, and controls the extension and retraction of the two piston cylinders; two proportional relief valves, respectively disposed in the rod chambers of the two piston cylinders; and a controller, which is signal-connected to and controls the two-way proportional valve and the two proportional relief valves; the controller is used to adjust the magnitude of the input electrical signal of the two-way proportional valve to control the pressing speed of the resonant crushing device, and also to adjust the magnitude of the input electrical signal of the proportional relief valve to adjust the clamping force of the resonant crushing device. The hydraulic clamping system and crushing method of this application can effectively and accurately control the clamping force and pressing speed of the resonant crushing device, which helps to improve the crushing quality and crushing efficiency of the impacted object.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a hydraulic clamping system and crushing method for a resonant crushing device. Background Technology

[0002] Currently, resonant crushing devices rely on the high-speed rotation of three eccentric blocks arranged vertically to generate high-frequency excitation force that reciprocates up and down to crush the object being struck. During continuous excitation, the resonant crushing device generally requires a clamping force to press it onto the surface of the object being struck, and the clamping force should continue to act as the longitudinal displacement of the impact deepens to avoid empty vibration.

[0003] In related technologies, the hydraulic clamping system of traditional resonant crushing devices generally uses a hydraulic cylinder connected to the crushing device. The continuous extension or retraction of the hydraulic cylinder drives the crushing device to move continuously along the impact depth, thereby clamping the crushing device and the impacted object. The cylinder is generally controlled by a common three-position four-way solenoid valve, and the operation is mostly done by the operator's experience.

[0004] However, different impacted objects have different characteristics (mainly referring to their natural frequency, which is related to material, hardness, width, thickness, etc.). The clamping force and pressing speed during the movement of the hydraulic cylinder are not effectively differentiated and controlled for impacted objects with different characteristics. This results in the inability to accurately control the composite action of the entire device, which involves clamping and high-frequency resonance crushing. Consequently, it affects the crushing quality and efficiency of the impacted object. For example, in some cases, it is required that the impacted object be crushed quickly and that there are strict requirements for the particle size distribution of the crushed material. Summary of the Invention

[0005] This application provides a hydraulic clamping system and crushing method for a resonant crushing device, which can effectively and accurately control the clamping force and pressing speed of the resonant crushing device, thereby helping to improve the crushing quality and crushing efficiency of the impacted object.

[0006] In a first aspect, embodiments of this application provide a hydraulic clamping system for a resonant crushing device, comprising:

[0007] Two piston cylinders, the cylinder barrels of both piston cylinders are fixedly connected to the resonance crushing device by a mechanical structure, and the cylinder rods of the piston cylinders are fixed in place;

[0008] A dual-proportional multi-way valve, wherein the dual-proportional multi-way valve obtains oil from a metering pump, supplies oil to two piston cylinders, and controls the extension and retraction of the two piston cylinders;

[0009] Two proportional relief valves are respectively installed in the rod chambers of the two piston cylinders;

[0010] The controller is connected to and controls the two proportional multi-way valves and the two proportional relief valves. The controller is used to adjust the magnitude of the input electrical signal of the two proportional multi-way valves to control the pressing speed of the resonant crushing device, and also to adjust the magnitude of the input electrical signal of the proportional relief valves to adjust the clamping force of the resonant crushing device.

[0011] In conjunction with the first aspect, in one embodiment, the two ports of the dual proportional multi-way valve are respectively connected to two piston cylinders, each port including port A and port B, wherein port A is connected to the rodless chamber of the piston cylinder and port B is connected to the rod chamber of the piston cylinder.

[0012] The controller adjusts the direction and opening degree of fluid delivery to the two chambers of the piston cylinder through ports A and B of each of the two proportional multi-way valves.

[0013] In conjunction with the first aspect, in one embodiment, the hydraulic clamping system further includes a slide rail, and the resonant crushing device moves up and down along the slide rail under the action of two piston cylinders to impact the object being struck.

[0014] In conjunction with the first aspect, in one embodiment, both piston cylinders are equipped with displacement sensors, and both displacement sensors are signal-connected to the controller; when the controller obtains the displacement difference of the monitoring data of the two displacement sensors, it adjusts the magnitude of the input electrical signal of the corresponding link in the two-way proportional multi-way valve, thereby maintaining displacement synchronization.

[0015] In conjunction with the first aspect, in one embodiment, the hydraulic clamping system further includes two dual balance valves, each dual balance valve having two parts respectively configured to communicate with the two chambers of the piston cylinder.

[0016] In conjunction with the first aspect, in one embodiment, each chamber of each piston cylinder is provided with a pressure sensor or pressure measuring connector, the pressure sensor or pressure measuring connector being signal-connected to a controller;

[0017] The controller adjusts the oil pressure in the rod chamber through a proportional relief valve, obtains the oil pressure in both chambers of the cylinder through a pressure sensor or pressure measuring connector, and adjusts the actual clamping force based on the known working area of ​​the two chambers.

[0018] In conjunction with the first aspect, in one embodiment, the hydraulic clamping system further includes a high-pressure accumulator and a low-pressure accumulator; the high-pressure accumulator is connected to the rod chambers of two piston cylinders via pipes, and the low-pressure accumulator is connected to the rodless chambers of the two piston cylinders via pipes.

[0019] Secondly, embodiments of this application provide a crushing method based on the above-mentioned hydraulic clamping system, comprising the following steps:

[0020] The controller divides the input electrical signal of the proportional relief valve into multiple levels, corresponding to several clamping forces of the resonant crushing device.

[0021] Under each clamping force, the controller gradually changes the magnitude of the input electrical signal of the two-way proportional valve, thereby adjusting the downward pressing speed of the resonant crushing device.

[0022] Multiple sets of crushing tests were conducted on the impacted object of the experimental sample to find the optimal combination of clamping force and pressing speed. The optimal combination of clamping force and pressing speed satisfies the requirement that the impacted object 15 is crushed in the shortest time and that the particle size distribution after crushing meets the set requirements.

[0023] The remaining material to be crushed is then crushed using the optimal combination of clamping force and downward speed.

[0024] In conjunction with the second aspect, in one embodiment, the hydraulic clamping system further includes a slide rail, and the resonant crushing device moves up and down along the slide rail under the action of two piston cylinders; both piston cylinders are equipped with displacement sensors, and both displacement sensors are signal-connected to the controller.

[0025] During the crushing test, when the displacement difference between the monitoring data of the two displacement sensors obtained by the controller exceeds the set threshold, the magnitude of the input electrical signal of the corresponding link in the two-way proportional valve is adjusted to keep the displacement of the two piston cylinders synchronized.

[0026] In conjunction with the second aspect, in one embodiment, each chamber of each piston cylinder is provided with a pressure sensor or pressure measuring connector, the pressure sensor or pressure measuring connector being signal-connected to the controller;

[0027] The controller adjusts the oil pressure in the rod chamber through a proportional relief valve, obtains the oil pressure in both chambers of the cylinder through a pressure sensor or pressure measuring connector, and adjusts the actual clamping force based on the known working area of ​​the two chambers.

[0028] The beneficial effects of the technical solutions provided in this application include at least the following:

[0029] 1. The hydraulic clamping system of this application has a controller signal connected to two proportional multi-way valves and two proportional relief valves. The controller controls the input electrical signal of the two proportional multi-way valves to control the pressing speed of the resonant crushing device, and controls the input electrical signal of the proportional relief valves to adjust the clamping force of the resonant crushing device. By matching different clamping forces and pressing speeds, the optimal combination of clamping force and pressing speed is sought for the impacted objects with different characteristics on the impacted objects (small area or small volume) of the experimental samples, so as to obtain the optimal resonant crushing quality and crushing efficiency, and thus to crush the impacted objects (large area or large volume) efficiently and with high quality.

[0030] 2. The crushing method of the hydraulic clamping system of this application involves dividing the clamping force into several levels. Under each clamping force level, the controller gradually changes the input electrical signal of the two-way proportional valve to adjust the downward pressing speed of the resonant crushing device. Multiple sets of tests are repeated to find the optimal combination of clamping force and downward pressing speed for the object being impacted. The optimal combination of clamping force and downward pressing speed satisfies the requirement that the object being impacted is crushed in the shortest time and that the particle size distribution after crushing meets the set requirements. The optimal combination of clamping force and downward pressing speed is found on the object being impacted in the experimental sample (small area or small volume). The optimal combination of clamping force and downward pressing speed is then applied to other objects to be crushed (large area or large volume) to obtain the optimal resonant crushing quality and crushing efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the hydraulic clamping system provided in the embodiments of this application;

[0033] In the diagram: 1. Oil tank; 2. Metering pump; 3. Two-way proportional multi-port valve; 4. Pressure gauge; 5. Pressure sensor; 6. Proportional relief valve; 7. Double balance valve; 8. High-pressure accumulator; 9. Low-pressure accumulator; 10. Pressure test connector; 11. Piston cylinder; 12. Displacement sensor; 13. Slide rail; 14. Resonance crushing device; 15. Object being impacted; 111. Cylinder barrel; 112. Cylinder rod; 113. Rod chamber; 114. Rodless chamber. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0035] Existing hydraulic clamping systems, when used with objects of different characteristics, have roughly the same clamping force and pressing speed during the movement of the cylinder. The entire device cannot precisely control the complex action of clamping and high-frequency resonant crushing. The hydraulic clamping system proposed in this application can effectively and precisely control the clamping force and pressing speed of the resonant crushing device, which helps to improve the crushing quality and crushing efficiency of the object being impacted.

[0036] like Figure 1 As shown, this application discloses an embodiment of a hydraulic clamping system for a resonant crushing device. The hydraulic clamping system includes a metering pump 2, two piston cylinders 11, a dual proportional multi-way valve 3, two proportional relief valves 6, and a controller.

[0037] The metering pump 2 is used to draw oil from the oil tank 1 and deliver oil to the two-way proportional valve 3.

[0038] Both piston cylinders 11 have their cylinder barrels 111 fixedly connected to the resonant crushing device 14 via a mechanical structure. The cylinder rods 112 of the piston cylinders 11 remain stationary. The two cylinder barrels 111 move synchronously, driving the resonant crushing device 14 to move up and down. When the cylinder barrels 111 of the piston cylinders 11 extend relative to the cylinder rods 112, the resonant crushing device 14 rises away from the surface of the object being impacted 15. When the cylinder barrels 111 of the piston cylinders 11 retract relative to the cylinder rods 112, the resonant crushing device 14 presses down onto the surface of the object being impacted 15. The downward pressing of the resonant crushing device 14 is the resonant crushing condition, where it vibrates at a high frequency while pressing down, thereby crushing the object being impacted 15.

[0039] The dual proportional multi-way valve 3 obtains oil from the metering pump 2, supplies oil to the two piston cylinders 11, and controls the extension and retraction of the two piston cylinders 11.

[0040] Two proportional relief valves 6 are respectively installed in the rod chambers 113 of the two piston cylinders 11. Compared with the rodless chamber 114, the rod chamber 113 is a high-pressure chamber and the rodless chamber 114 is a low-pressure chamber. Specifically, the proportional relief valves 6 are connected to the rod chambers 113 of the piston cylinders 11 through pipelines, forming an relief pressure regulating circuit to regulate the oil pressure.

[0041] The controller signal connects the two-way proportional valve 3 and the two proportional relief valves 6. The controller inputs electrical signals of different magnitudes to the two-way proportional valve 3 and the two proportional relief valves 6, thereby controlling the direction (corresponding to lifting / lowering) and opening degree (corresponding to lifting / lowering speed) of the two-way proportional valve 3, and controlling the overflow opening degree (corresponding to hydraulic pressure, i.e., clamping force) of the proportional relief valves 6. Specifically, the controller is used to adjust the magnitude of the input electrical signal to the two-way proportional valve 3 to control the downward pressing speed of the resonant crushing device 14, and also to adjust the magnitude of the input electrical signal to the proportional relief valves 6 to adjust the clamping force of the resonant crushing device 14.

[0042] Specifically, regarding the lifting and lowering speeds, this application focuses only on the downward speed and not the upward speed.

[0043] Specifically, there are three main indicators for resonant crushing operations: resonance, clamping force, and pressing speed. This application mainly focuses on the latter two indicators (clamping force and pressing speed) and does not elaborate on resonance.

[0044] Specifically, the controller can adjust the retraction speed of the hydraulic cylinder by adjusting the magnitude of the input electrical signal to the proportional multi-way valve 3 (retraction corresponds to...). Figure 1 The cylinder barrel moves downwards. The magnitude of the cylinder's retraction force can be adjusted by changing the input electrical signal of the proportional relief valve 6. Since the cylinder rod 112 is fixed, the retraction of the piston cylinder 11 causes the cylinder barrel 111 to drive the resonance crushing device 14 to press together onto the surface of the object being impacted 15. The retraction force is equal to the clamping force applied by the resonance crushing device 14 to the object being impacted 15, and the retraction speed is equal to the downward pressing speed of the resonance crushing device 14.

[0045] The hydraulic clamping system of this application has a controller signal connected to a two-way proportional multi-port valve 3 and two proportional relief valves 6. The controller controls the input electrical signal of the two-way proportional multi-port valve 3, thereby controlling the pressing speed of the resonant crushing device 14. The controller also controls the input electrical signal of the proportional relief valves 6, thereby adjusting the clamping force of the resonant crushing device 14. By matching different clamping forces and pressing speeds, the system seeks the optimal combination of clamping force and pressing speed on the impacted object 15 (small area or small volume) of the experimental sample to obtain the optimal resonant crushing quality and crushing efficiency, thereby achieving efficient and high-quality crushing of the impacted object 15 (large area or large volume).

[0046] Specifically, in one instance, the optimal index is achieved by meeting the requirements in the shortest time and particle size distribution. For example, it is required that more than 80% of the particles be between 5 and 10 mm in size. The optimal combination of compressing force and pressing speed is the one that crushes the particles in the shortest time and ensures that more than 80% of the crushed particles are between 5 and 10 mm in size.

[0047] Furthermore, in one embodiment, the two ports of the dual proportional multi-way valve 3 are respectively connected to two piston cylinders 11. Each port includes port A and port B. Port A is connected to the rodless chamber 114 of the piston cylinder 11, and port B is connected to the rod chamber 114 of the piston cylinder 11.

[0048] The controller changes the direction and opening of the liquid delivery to the two chambers of the piston cylinder 11 through the A and B ports of each of the two proportional multi-way valves 3, thereby controlling the extension or retraction of the cylinder 111 relative to the cylinder rod 112 and the corresponding extension and retraction speed.

[0049] Specifically, such as Figure 1 As shown, the A1 port of each of the two-way proportional multi-port valves 3 is connected to the A2 port of the rodless chamber 114 of the piston cylinder 11, and the B1 port of each is connected to the B2 port of the rod chamber 113 of the piston cylinder 11. When oil is input into A1 and A2 and oil is output from B1 and B2, the resonant crushing device 14 rises; when oil is output from A1 and A2 and oil is input from B1 and B2, the resonant crushing device 14 falls.

[0050] The hydraulic clamping system of this application uses a controller to change the direction and opening of the fluid supply to the two chambers of the piston cylinder 11 through the A and B ports of each of the two proportional multi-way valves 3. This controls the extension or retraction of the cylinder 111 relative to the cylinder rod 112 and the corresponding extension and retraction speed. By adjusting the magnitude of the input electrical signal of the two proportional multi-way valves 3, the pressing speed of the resonant crushing device 14 can be controlled, achieving precise control and laying the foundation for improving crushing quality and crushing efficiency.

[0051] Furthermore, in one embodiment, the hydraulic clamping system also includes a slide rail 13, and the resonant crushing device 14 moves up and down along the slide rail 13 under the action of two piston cylinders 11 to impact the object 15 being struck.

[0052] Specifically, the resonant crushing device 14 is positioned between the two slide rails 13, and the movement gap between the resonant crushing device 14 and the slide rails 13 is very small.

[0053] Furthermore, in one embodiment, displacement sensors 12 are provided on both piston cylinders 11, and both displacement sensors 12 are signal-connected to the controller. The displacement sensors 12 are used to monitor the relative displacement between the cylinder barrel 111 and the cylinder rod.

[0054] The controller acquires data from the two displacement sensors 12 in real time and compares the displacements in real time. When the displacement difference between the monitoring data of the two displacement sensors 12 exceeds the set threshold, it indicates that the displacements of the two piston cylinders 11 are not synchronized. The controller adjusts the magnitude of the input electrical signal of the corresponding link in the two-way proportional valve 3, thereby adjusting the relative speed of the two cylinders to ensure synchronized movement.

[0055] Specifically, the movement displacement of the two piston cylinders 11 must be kept synchronized, otherwise the resonance crushing device 14 will be stuck in the slide rail 13. To this end, the displacement sensors 12 on the two piston cylinders 11 are used to compare the displacement in real time. If the displacement difference exceeds the set threshold, the input electrical signal of the corresponding link in the two-way proportional multi-way valve 3 is adjusted, thereby adjusting the relative movement speed of the two piston cylinders 11 to ensure that the movement displacement is synchronized.

[0056] The hydraulic clamping system of this application sets two displacement sensors 12 on two piston cylinders 11 respectively. The controller acquires the data of the two displacement sensors 12 in real time and compares the displacements in real time. When the displacement difference exceeds the set threshold, it indicates that the displacements of the two piston cylinders 11 are not synchronized. The controller adjusts the magnitude of the input electrical signal of the corresponding link in the two-way proportional multi-way valve 3, thereby adjusting the relative movement speed of the two cylinders to ensure that the movement displacement of the two piston cylinders 11 is synchronized and to prevent the resonance crushing device 14 from sliding and getting stuck along the slide rail 13.

[0057] Furthermore, in one embodiment, the hydraulic clamping system also includes two double balance valves 7, with each double balance valve 7 having two parts respectively connected to the two chambers of the piston cylinder 11.

[0058] Each piston cylinder 11 is equipped with a double balance valve 7 in both chambers. Specifically, the two parts of the double balance valve 7 are respectively connected to the two chambers of the piston cylinder 11. The double balance valve 7 is used to control the extension and retraction of the hydraulic cylinder to make the movement smoother, and also to hydraulically lock the resonant crushing device 14 when it is not in operation.

[0059] Furthermore, in one embodiment, each chamber of each piston cylinder 11 is provided with a pressure sensor 5 or a pressure measuring connector 10, and the pressure sensor 5 or the pressure measuring connector 10 is connected to the controller, so that the controller can obtain the oil pressure of the two chambers in real time.

[0060] The controller adjusts the oil pressure in the rod chamber 113 through the proportional relief valve 6, obtains the oil pressure in both chambers of the cylinder through the pressure sensor 5 or the pressure measuring connector 10, and adjusts the actual clamping force based on the known working area of ​​the two chambers.

[0061] Specifically, if the oil pressure in the rod chamber 113 is P1 and the working area is S1, and the oil pressure in the rodless chamber 114 is P2 and the working area is S2, then the actual clamping force is equal to P1×S1-P2×S2.

[0062] The hydraulic clamping system of this application uses a controller to adjust the oil pressure of the rod chamber 113 through a proportional relief valve 6, and obtains the oil pressure of the two chambers of the cylinder through a pressure sensor 5 or a pressure measuring connector 10. The controller adjusts the actual clamping force by combining the known working area of ​​the two chambers, thereby achieving precise control and adjustment of the actual clamping force.

[0063] Furthermore, in one embodiment, the hydraulic clamping system further includes a high-pressure accumulator 8 and a low-pressure accumulator 9. The high-pressure accumulator 8 is connected to the rod chamber 113 of the two piston cylinders 11 via a pipe, and the low-pressure accumulator 9 is connected to the rodless chamber 114 of the two piston cylinders 11 via a pipe.

[0064] The hydraulic clamping system of this application is based on the process of the hydraulic cylinder driving the resonance crushing device 14 to press down and crush the object 15 being struck. This process often generates huge pressure impacts in the two chambers of the hydraulic cylinder. A high-pressure accumulator 8 and a low-pressure accumulator 9 are set in the two chambers of the hydraulic cylinder. The high-pressure accumulator 8 and the low-pressure accumulator 9 can effectively absorb the pressure impacts, making the clamping force control less affected by load disturbances and the clamping force control more precise.

[0065] Preferably, a pressure gauge 4 is installed on the dual proportional multi-way valve 3. The pressure gauge 4 is used to monitor the working pressure, which can partially and intuitively reflect the characteristics of the object 15 being struck.

[0066] The hydraulic clamping system of this application uses a dual proportional multi-way valve 3 to control the clamping cylinder and a proportional relief valve 6 is set in the rod chamber 113 of the cylinder to control the magnitude of the cylinder's retraction force. At the same time, accumulators are set in the two chambers of the cylinder to absorb the pressure impact during the cylinder's movement. Ultimately, it achieves effective control over the cylinder's clamping force and pressing speed, thereby improving the crushing quality and crushing efficiency of the impacted object.

[0067] Secondly, this application discloses a crushing method based on the above-mentioned hydraulic clamping system, comprising the following steps:

[0068] The controller divides the input electrical signal of the proportional relief valve 6 into multiple levels, corresponding to several clamping forces of the resonant crushing device 14. When there are two variables, one variable is designated as a constant.

[0069] Under each clamping force, the controller gradually changes the magnitude of the input electrical signal of the two-way proportional valve, thereby adjusting the pressing speed of the resonant crushing device.

[0070] Multiple sets of tests were repeated on the impacted object 15 in the experimental sample to find the optimal combination of clamping force and downward pressing speed for the impacted object 15. The optimal combination of clamping force and downward pressing speed satisfies the requirement that the impacted object 15 breaks in the shortest time and that the particle size distribution of the broken particles meets the set requirements. The optimal combination of clamping force and downward pressing speed is the optimal solution for breaking the impacted object 15 with these characteristics.

[0071] By applying the optimal combination of clamping force and downward speed to crush other objects 15 with the same characteristics, the optimal crushing quality (particle size distribution meets requirements) and crushing efficiency (fastest crushing) can be obtained.

[0072] The hydraulic clamping system crushing method of this application divides the clamping force into several levels. Under each clamping force level, the controller gradually changes the input electrical signal of the two-way proportional valve to adjust the downward pressing speed of the resonant crushing device. Multiple sets of tests are repeated to find the optimal combination of clamping force and downward pressing speed for the object being impacted (15). The optimal combination of clamping force and downward pressing speed satisfies the requirement that the object being impacted (15) is crushed in the shortest time and that the particle size distribution after crushing meets the set requirements. The optimal combination of clamping force and downward pressing speed is found on the object being impacted (15) in the experimental sample (small area or small volume). Applying the optimal combination of clamping force and downward pressing speed to other objects being impacted (15) (large area or large volume) yields the optimal resonant crushing quality and crushing efficiency. Compared to existing technologies that blindly impact objects with different characteristics, this application significantly improves the crushing quality and crushing efficiency.

[0073] Furthermore, in one embodiment, the hydraulic clamping system also includes a slide rail 13, and the resonant crushing device 14 moves up and down along the slide rail 13 under the action of two piston cylinders 11 to impact the object 15 being struck.

[0074] Specifically, the resonant crushing device 14 is positioned between the two slide rails 13, and the movement gap between the resonant crushing device 14 and the slide rails 13 is very small.

[0075] Displacement sensors 12 are installed on both piston cylinders 11. Both displacement sensors 12 are connected to the controller. The displacement sensors 12 are used to monitor the relative displacement between the cylinder barrel 111 and the cylinder rod.

[0076] During the crushing test, the controller acquires data from the two displacement sensors 12 in real time and compares the displacements. When the displacement difference between the monitoring data of the two displacement sensors 12 exceeds the set threshold, it indicates that the displacements of the two piston cylinders 11 are not synchronized. The controller then adjusts the magnitude of the input electrical signal of the corresponding link in the dual proportional multi-way valve 3 to regulate the relative speed of the two cylinders and ensure synchronized movement.

[0077] Specifically, the movement displacement of the two piston cylinders 11 must be kept synchronized, otherwise the resonance crushing device 14 will be stuck in the slide rail 13. To this end, the displacement sensors 12 on the two piston cylinders 11 are used to compare the displacement in real time. If the displacement difference exceeds the set threshold, the input electrical signal of the corresponding link in the two-way proportional multi-way valve 3 is adjusted, thereby adjusting the relative movement speed of the two piston cylinders 11 to ensure that the movement displacement is synchronized.

[0078] Furthermore, in one embodiment, each chamber of each piston cylinder 11 is provided with a pressure sensor 5 or a pressure measuring connector 10, and the pressure sensor 5 or the pressure measuring connector 10 is connected to the controller, so that the controller can obtain the oil pressure of the two chambers in real time.

[0079] The controller adjusts the oil pressure in the rod chamber 113 through the proportional relief valve 6, obtains the oil pressure in both chambers of the cylinder through the pressure sensor 5 or the pressure measuring connector 10, and adjusts the actual clamping force based on the known working area of ​​the two chambers.

[0080] The crushing method of this application divides the clamping force into several levels, and adjusts the oil pressure of the rod chamber 113 by the proportional overflow valve 6 to achieve precise control and adjustment of the actual clamping force.

[0081] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hydraulic clamping system for a resonant crushing device, characterized in that, Include: Two piston cylinders (11), the cylinder barrels (111) of the two piston cylinders (11) are fixed to the resonance crushing device (14) by mechanical structure, and the cylinder rods (112) of the piston cylinders (11) are fixed. A two-way proportional valve (3) obtains oil from a metering pump (2), supplies oil to two piston cylinders (11), and controls the extension and retraction of the two piston cylinders (11); Two proportional relief valves (6) are respectively installed in the rod chambers (113) of the two piston cylinders (11). The controller is connected to and controls the two proportional multi-way valves (3) and the two proportional relief valves (6); the controller is used to adjust the magnitude of the input electrical signal of the two proportional multi-way valves (3) to control the pressing speed of the resonant crushing device (14), and also to adjust the magnitude of the input electrical signal of the proportional relief valves (6) to adjust the clamping force of the resonant crushing device (14). The two ports of the two-port proportional multi-way valve (3) are respectively connected to two piston cylinders (11). Each port includes port A and port B. Port A is connected to the rodless chamber (114) of the piston cylinder (11), and port B is connected to the rod chamber (113) of the piston cylinder (11). The controller adjusts the infusion direction and infusion opening of the two chambers of the piston cylinder (11) through the A port and B port of each of the two proportional multi-way valves (3); The hydraulic clamping system also includes a slide rail (13), and the resonant crushing device (14) moves up and down along the slide rail (13) under the action of two piston cylinders (11) to impact the object being struck (15).

2. The hydraulic clamping system of the resonant crushing device as described in claim 1, characterized in that: Both piston cylinders (11) are equipped with displacement sensors (12), and both displacement sensors (12) are connected to the controller. When the displacement difference of the monitoring data of the two displacement sensors (12) obtained by the controller exceeds the set threshold, the magnitude of the input electrical signal of the corresponding link in the two-way proportional multi-way valve (3) is adjusted to maintain displacement synchronization.

3. The hydraulic clamping system of the resonant crushing device as described in claim 1, characterized in that: The hydraulic clamping system also includes two double balance valves (7), each double balance valve (7) having two parts respectively connected to the two chambers of the piston cylinder (11).

4. The hydraulic clamping system of the resonant crushing device as described in claim 1, characterized in that: Each chamber of each piston cylinder (11) is equipped with a pressure sensor (5) or pressure measuring connector (10), and the pressure sensor (5) or pressure measuring connector (10) is connected to the controller. The controller adjusts the oil pressure in the rod chamber (113) through the proportional overflow valve (6), obtains the oil pressure in the two chambers of the cylinder through the pressure sensor (5) or the pressure measuring connector (10), and adjusts the actual clamping force based on the known working area of ​​the two chambers.

5. The hydraulic clamping system of the resonant crushing device as described in claim 1, characterized in that: The hydraulic clamping system also includes a high-pressure accumulator (8) and a low-pressure accumulator (9); the high-pressure accumulator (8) is connected to the rod chamber (113) of the two piston cylinders (11) through a pipe, and the low-pressure accumulator (9) is connected to the rodless chamber (114) of the two piston cylinders (11) through a pipe.

6. A crushing method based on the hydraulic clamping system of claim 1, characterized in that, Includes the following steps: The controller divides the input electrical signal of the proportional overflow valve (6) into multiple levels, corresponding to several clamping forces of the resonant crushing device (14); Under each clamping force, the controller gradually changes the magnitude of the input electrical signal of the two-way proportional multi-way valve (3) to adjust the pressing speed of the resonant crushing device (14); Multiple sets of crushing tests were conducted on the impacted object (15) of the experimental sample to find the optimal combination of clamping force and pressing speed. The optimal combination of clamping force and pressing speed satisfies the requirement that the impacted object (15) is crushed in the shortest time and that the particle size distribution after crushing meets the set requirements. The remaining impacted material (15) is crushed using the optimal combination of clamping force and downward speed.

7. The crushing method as described in claim 6, characterized in that: The hydraulic clamping system also includes a slide rail (13), and the resonant crushing device (14) moves up and down along the slide rail (13) under the action of two piston cylinders (11); both piston cylinders (11) are equipped with displacement sensors (12), and both displacement sensors (12) are connected to the controller. During the crushing test, when the displacement difference between the monitoring data of the two displacement sensors (12) obtained by the controller exceeds the set threshold, the magnitude of the input electrical signal of the corresponding link in the two-way proportional multi-way valve (3) is adjusted to keep the displacement of the two piston cylinders (11) synchronized.

8. The crushing method as described in claim 6, characterized in that: Each chamber of each piston cylinder (11) is equipped with a pressure sensor (5) or pressure measuring connector (10), and the pressure sensor (5) or pressure measuring connector (10) is connected to the controller. The controller adjusts the oil pressure in the rod chamber (113) through the proportional overflow valve (6), obtains the oil pressure in the two chambers of the cylinder through the pressure sensor (5) or the pressure measuring connector (10), and adjusts the actual clamping force based on the known working area of ​​the two chambers.

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