Hydraulic cylinder loading test system

Abstract

The present invention relates to the technical field of engineering machinery, and proposes a hydraulic cylinder loading test system for performance testing of hydraulic cylinders. The hydraulic cylinder loading test system includes: a driving component for connecting with multiple hydraulic cylinders to drive the piston rods of the multiple hydraulic cylinders to extend and retract; multiple loading parts, the multiple loading parts are connected to the multiple hydraulic cylinders in a one-to-one correspondence, and are used to provide load for the hydraulic cylinders. The loading parts include: a loading cylinder: a loading piston rod, one end of the loading piston rod extends into the loading cylinder, and the other end of the loading piston rod is connected to the piston rod of the hydraulic cylinder; a synchronization component, the synchronization component is connected with the rod cavities of the multiple loading cylinders and the rodless cavities of the multiple loading cylinders, and is used to synchronize the hydraulic oil flow in the rod cavities of the multiple loading cylinders during the extension of the multiple loading piston rods, or to synchronize the hydraulic oil flow in the rodless cavities of the multiple loading cylinders during the retraction of the multiple loading piston rods.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a hydraulic cylinder loading test system. Background Art

[0002] In the related art, the extension and retraction process of the piston rod of the hydraulic cylinder is tested by a test device. In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: when performing performance comparison tests on different hydraulic cylinders, it is necessary to test multiple hydraulic cylinders separately, record the data, and then compare the data to finally obtain the comparison results. The test process is long, the data recording and calculation process is cumbersome, and the test efficiency is low. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art or related art, that is, when conducting performance comparison tests on different hydraulic cylinders, the test process is long, the data recording and calculation process is cumbersome, and the test efficiency is low.

[0004] To this end, the present invention proposes a hydraulic cylinder loading test system.

[0005] In view of this, the present invention proposes a hydraulic cylinder loading test system for performance testing of hydraulic cylinders. The hydraulic cylinder loading test system includes: a driving component for connecting with multiple hydraulic cylinders to drive the piston rods of multiple hydraulic cylinders to extend and retract; multiple loading parts, the multiple loading parts are connected to the multiple hydraulic cylinders in a one-to-one correspondence, for providing load for the hydraulic cylinder, the loading parts include: a loading cylinder: a loading piston rod, one end of the loading piston rod extends into the loading cylinder, and the other end of the loading piston rod is connected to the piston rod of the hydraulic cylinder; a synchronization component, the synchronization component is connected to the rod cavities of the multiple loading cylinders and the rodless cavities of the multiple loading cylinders, and is used to synchronize the hydraulic oil flow in the rod cavities of the multiple loading cylinders during the extension of the multiple loading piston rods, or to synchronize the hydraulic oil flow in the rodless cavities of the multiple loading cylinders during the retraction of the multiple loading piston rods.

[0006] The hydraulic cylinder loading test system provided by the present invention can be used to test the performance of hydraulic cylinders, specifically the operating performance of hydraulic cylinders in hydraulic supports of engineering equipment. Specifically, the hydraulic cylinder loading test system includes a drive assembly that can be connected to multiple hydraulic cylinders to be tested. Specifically, the drive assembly drives the hydraulic oil within the hydraulic cylinders to cause the piston rods of the hydraulic cylinders to extend and retract, simulating the actual piston rod extension and retraction process of the hydraulic cylinders during operation.

[0007] Furthermore, the hydraulic cylinder loading test system includes multiple loading units, each connected to a plurality of hydraulic cylinders in a one-to-one correspondence to simulate the loads experienced by the hydraulic cylinders during actual operation. Specifically, the loading units include a loading cylinder and a loading piston rod. One end of the loading piston rod extends into the loading cylinder, and the other end of the loading piston rod is connected to the piston rod of the hydraulic cylinder to be tested. Specifically, the loading piston rod may be hinged to ensure flexibility in relative movement between the loading piston rod and the piston rod of the hydraulic cylinder to be tested.

[0008] It can be understood that by inputting hydraulic oil into the loading cylinder, a force can be applied to the loading piston rod, and then the force is transmitted to the piston rod of the hydraulic cylinder to be tested through the loading piston rod, thereby simulating the load on the piston rod of the hydraulic cylinder during actual working process, thereby ensuring that the hydraulic cylinder loading test system can effectively simulate the actual working process of the hydraulic cylinder and improve the test effect.

[0009] Furthermore, the hydraulic cylinder loading test system also includes a synchronization assembly that simultaneously communicates with the rod chambers and rodless chambers of the multiple loading cylinders. That is, during operation of the loading cylinders, hydraulic oil flowing out of either the rod chamber or the rodless chamber of the loading cylinder can enter the synchronization assembly. Furthermore, the synchronization assembly synchronizes the flow rates of the hydraulic oil in the rod chambers of the multiple loading cylinders during extension of the multiple loading piston rods, i.e., during the flow of hydraulic oil from the rod chambers of the multiple loading cylinders into the synchronization assembly. Correspondingly, during retraction of the multiple loading piston rods, i.e., during the flow of hydraulic oil from the rodless chambers of the multiple loading cylinders into the synchronization assembly, the synchronization assembly synchronizes the flow rates of the hydraulic oil flowing out of the rodless chambers. In other words, during extension and retraction of the loading piston rods, the synchronization assembly ensures that the movement speeds of the multiple loading piston rods remain consistent, thereby achieving synchronized operation of the multiple loading units. This in turn synchronizes the movement of the piston rods of the multiple hydraulic cylinders connected to the multiple loading piston rods.

[0010] It is understandable that when conducting comparative tests on multiple hydraulic cylinders with different parameters, the motion processes of the piston rods of the multiple hydraulic cylinders are synchronized through the synchronization component, that is, the multiple hydraulic cylinders with different parameters are operated synchronously, so that the comparison results of the multiple hydraulic cylinders can be obtained by observing the operating status of each hydraulic cylinder, without having to record and calculate the operating data of each hydraulic cylinder, thereby improving the test efficiency. For example, the hydraulic cylinder loading test system can be used to conduct comparative tests on the sealing effects of multiple hydraulic cylinders including different seals. Through the synchronization component, the multiple hydraulic cylinders are operated synchronously, and the sealing effect of each hydraulic cylinder is observed at the same time. The seal equipped with the hydraulic cylinder that leaks first has the worst sealing effect, and the seal equipped with the hydraulic cylinder that leaks last has the best sealing effect.

[0011] The hydraulic cylinder loading test system provided by the present invention is connected to a plurality of hydraulic cylinders to be tested through a driving assembly and a loading part, so that the expansion and contraction of the hydraulic cylinder to be tested and the load received during the actual working process can be simulated, thereby ensuring that the hydraulic cylinder loading test system can effectively simulate the actual working process of the hydraulic cylinder and improve the test effect. Furthermore, through the setting of the synchronization assembly, it can be ensured that the movement speed of the multiple loading piston rods remains consistent, that is, the synchronous operation of the multiple loading parts is achieved, and the movement process of the piston rods of the multiple hydraulic cylinders connected to the multiple loading piston rods is kept synchronized. When conducting comparative tests on multiple hydraulic cylinders with different parameters, the movement process of the piston rods of the multiple hydraulic cylinders is kept synchronized through the synchronization assembly, and the comparison results of the multiple hydraulic cylinders can be obtained by observing the operating status of each hydraulic cylinder without recording and calculating the operating data of each hydraulic cylinder, thereby improving the test efficiency.

[0012] In addition, the hydraulic cylinder loading test system in the above technical solution provided by the present invention may also have the following additional technical features:

[0013] In the above technical solution, further, the synchronization component includes: multiple synchronization parts, the multiple synchronization parts are connected to the multiple loading parts one by one, and the inlets of the synchronization parts are connected to the rod chamber and the rodless chamber of the multiple loading cylinders; a connecting part, connected to the multiple synchronization parts, used to ensure the synchronous operation of the multiple synchronization parts, so that the flow of hydraulic oil flowing through the multiple synchronization parts remains synchronized.

[0014] In this technical solution, the synchronization assembly can include multiple synchronization members connected to the multiple loading parts in a one-to-one correspondence, and the inlet of each synchronization member is connected to the rod chamber and rodless chamber of a loading cylinder. In other words, during the operation of the hydraulic cylinder loading test system, when the loading piston rod of the hydraulic cylinder loading test system retracts, the hydraulic oil in the rodless chamber of the loading cylinder can enter the synchronization member and drive the synchronization member to operate. Correspondingly, when the loading piston rod of the hydraulic cylinder loading test system extends, the hydraulic oil in the rod chamber of the loading cylinder can enter the synchronization member and drive the synchronization member to operate.

[0015] Furthermore, the synchronization component also includes a connecting part, which is connected to multiple synchronization parts at the same time, so that the setting of the connecting part can ensure that the multiple synchronization parts operate synchronously. That is, during the operation of the hydraulic cylinder loading test system, when the loading cylinder drives the synchronization part to operate, the connecting part connected by multiple synchronization parts enables the multiple synchronization parts to operate synchronously, thereby enabling the multiple loading piston rods to be synchronously extended and retracted, and then enabling the piston rods of the multiple hydraulic cylinders connected to the loading piston rod to be synchronously extended and retracted, so as to realize the synchronous operation of multiple hydraulic cylinders.

[0016] In the above technical solution, further, the synchronous part includes: a shell, an inlet is opened on the shell, the inlet is used for the flow of hydraulic oil, and the inlet is connected with the rod cavity and the rodless cavity of multiple loading cylinders; a rotating shaft is arranged in the shell; the fan blades are sleeved on the rotating shaft, when hydraulic oil flows through the shell, the hydraulic oil can drive the fan blades to rotate, so that the fan blades drive the rotating shaft to rotate; the connecting part includes: a synchronous belt, the synchronous belt is connected to the rotating shafts of multiple synchronous parts.

[0017] In this technical solution, the synchronizer includes a housing, and an inlet is provided on the housing. Through the setting of the inlet, during the operation of the loading part, the hydraulic oil flowing out of the rod chamber of the loading cylinder or the rodless chamber of the loading cylinder can enter the housing of the synchronizer, so as to realize the operation of the synchronizer driven by the hydraulic oil.

[0018] Furthermore, the synchronizer includes a rotating shaft and blades disposed within the housing. The blades are sleeved on the rotating shaft. When hydraulic oil flows through the housing, the hydraulic oil drives the blades to move, thereby causing the blades to rotate the rotating shaft. In other words, the synchronizer is driven by the hydraulic oil.

[0019] Furthermore, the connecting member may include a synchronous belt, which is connected to the rotating shafts of multiple synchronous members at the same time, so that the rotating shafts of multiple synchronous members can maintain synchronous rotation under the action of the synchronous belt, and then the fan blades connected to the rotating shafts can maintain synchronous rotation, and then the flow of hydraulic oil in the shell can be kept synchronized, that is, the flow of hydraulic oil in the loading cylinder is kept synchronized, and finally the synchronous operation of multiple hydraulic cylinders is achieved.

[0020] In the above technical solution, further, the hydraulic cylinder loading test system also includes a plurality of stop valves, the plurality of stop valves are connected to the plurality of synchronizers in a one-to-one correspondence, and the stop valves are communicated with outlets of the synchronizers.

[0021] In this technical solution, a shutoff valve is also provided at the outlet of each synchronizer. The number of shutoff valves is the same as the number of synchronizers, with multiple shutoff valves corresponding to each synchronizer. In other words, a shutoff valve is provided at the outlet of each synchronizer. The provision of the shutoff valves allows the hydraulic oil at the synchronizer outlet to be switched on and off, thereby enabling independent control of multiple synchronizers, and therefore, independent control of multiple test channels.

[0022] Furthermore, the outlet of the synchronizer can be connected to the rod chamber and the rodless chamber of the loading cylinder, and a switch valve can be set between the outlet of the synchronizer and the loading cylinder. When a hydraulic cylinder test is completed, the stop valve corresponding to the hydraulic cylinder is cut off, and the switch valve corresponding to the hydraulic cylinder is opened at the same time to avoid the continuous increase of pressure in the test channel corresponding to the hydraulic cylinder, thereby ensuring the safety of the test channel.

[0023] In the above technical solution, further, the hydraulic cylinder loading test system also includes: a first reversing valve, connected to multiple stop valves; a first overflow valve, connected to the first reversing valve; a second overflow valve, connected to the first reversing valve; wherein the first reversing valve is used to control the first overflow valve to be connected to the rodless chamber of the loading cylinder, or to control the second overflow valve to be connected to the rod chamber of the loading cylinder.

[0024] In this technical solution, the hydraulic cylinder loading test system also includes a first reversing valve, which is connected to multiple shut-off valves. That is, the hydraulic oil flowing out of the outlets of multiple synchronizer parts passes through the corresponding shut-off valves and flows into the first reversing valve, and then flows to different channels through the reversing of the first reversing valve.

[0025] Furthermore, the hydraulic cylinder loading test system also includes a first overflow valve and a second overflow valve, both of which are connected to the first reversing valve, and through the reversing of the first reversing valve, the first overflow valve can be connected to the rodless chamber of the loading cylinder, or the second overflow valve can be connected to the rod chamber of the loading cylinder.

[0026] By setting the first overflow valve, the pressure of the hydraulic oil in the rodless chamber of the loading cylinder can be controlled, thereby controlling the load of the loading piston rod when the loading piston rod is retracted, and further controlling the load of the piston rod during the extension process of the piston rod of the hydraulic cylinder to be tested.

[0027] Correspondingly, by controlling the second overflow valve, the pressure of the hydraulic oil in the rod chamber of the loading cylinder can be controlled, thereby controlling the load of the loading piston rod when the loading piston rod is extended, and further controlling the load of the piston rod during the retraction process of the piston rod of the hydraulic cylinder to be tested.

[0028] In the above technical solution, further, the hydraulic cylinder loading test system also includes: a first one-way valve, the first one-way valve is connected between the rodless chamber and the inlet of the loading cylinder, and the conduction direction of the first one-way valve is from the rodless chamber of the loading cylinder to the inlet; a second one-way valve, the second one-way valve is connected between the rod chamber and the inlet of the loading cylinder, and the conduction direction of the second one-way valve is from the rod chamber of the loading cylinder to the inlet.

[0029] In this technical solution, a first one-way valve is installed between the rodless chamber of the loading cylinder and the inlet of the synchronizer. Correspondingly, a second one-way valve is installed between the rod chamber of the loading cylinder and the inlet of the synchronizer. The first one-way valve is configured to direct flow from the rodless chamber of the loading cylinder to the synchronizer, while the second one-way valve is configured to direct flow from the rod chamber of the loading cylinder to the synchronizer.

[0030] During the retraction of the loading piston rod of the loading cylinder, the hydraulic oil in the rodless chamber of the loading cylinder can flow to the synchronizer through the first one-way valve. At the same time, due to the setting of the second one-way valve, the hydraulic oil flowing out of the rodless chamber cannot return to the rod chamber of the loading cylinder, thereby ensuring the correct flow direction of the hydraulic oil, avoiding changes in the pressure of the hydraulic oil, and ensuring the accuracy of the load generated by the loading part.

[0031] At the same time, by setting the first one-way valve and the second one-way valve, while achieving the correct flow direction of the hydraulic oil, the piping structure of the hydraulic cylinder loading test system can be simplified, avoiding the hydraulic cylinder loading test system structure being too complicated.

[0032] In the above technical solution, the hydraulic cylinder loading test system further includes: a first oil tank; a first pump body, the inlet of the first pump body is connected to the first oil tank, and the outlet of the first pump body is connected to the rod chambers of multiple loading cylinders and the rodless chambers of the loading cylinders.

[0033] In this technical solution, the hydraulic cylinder loading test system further includes a first oil tank and a first pump body, wherein the first oil tank is used to store hydraulic oil, and at the same time, the hydraulic oil can be driven by the first pump body.

[0034] Specifically, the inlet of the first pump body is connected to the first oil tank, and the outlet of the first pump body is connected to the rod chambers and rodless chambers of multiple loading cylinders. Through the first oil tank and the first pump body, oil can be supplied to the rod chambers or the rodless chambers of the loading cylinders. During the test, when the loading piston rod retracts, the hydraulic oil in the rodless chamber of the loading cylinder flows to the first relief valve. At this time, hydraulic oil is delivered to the rod chamber of the loading cylinder through the first oil tank and the first pump body, ensuring that the loading cylinder remains filled with fluid at all times, thus ensuring the stable operation of the hydraulic cylinder loading test system.

[0035] In the above technical solution, further, the hydraulic cylinder loading test system also includes: a third one-way valve, the third one-way valve is connected between the outlet of the first pump body and the rodless chamber of the loading cylinder, and the conduction direction of the third one-way valve is from the first pump body to the loading cylinder; a fourth one-way valve, the fourth one-way valve is connected between the outlet of the first pump body and the rod chamber of the loading cylinder, and the conduction direction of the fourth one-way valve is from the first pump body to the loading cylinder.

[0036] In this technical solution, the hydraulic cylinder loading test system also includes a third one-way valve and a fourth one-way valve, wherein the third one-way valve is connected between the outlet of the first pump body and the rodless chamber of the loading cylinder, and the conduction direction of the third one-way valve is from the first pump body to the loading cylinder.

[0037] Correspondingly, the fourth one-way valve is connected between the outlet of the first pump body and the rod chamber of the loading cylinder, and the conducting direction of the fourth one-way valve is from the first pump body to the loading cylinder.

[0038] During the test, when the hydraulic rod of the hydraulic cylinder under test extends, the loading piston rod retracts, allowing the hydraulic oil in the loading cylinder's rodless chamber to flow through the first check valve to the synchronizer. At this point, the first pump operates, driving the hydraulic oil in the first oil tank to flow toward the third and fourth check valves. Simultaneously, the hydraulic oil in the loading cylinder's rodless chamber flows out, creating pressure on both ends of the third check valve, preventing the hydraulic oil from flowing through the third check valve. This allows the first pump to force the hydraulic oil through the fourth check valve and into the loading cylinder's rod chamber. Conversely, when the hydraulic rod of the hydraulic cylinder under test retracts, the loading piston rod extends, allowing the hydraulic oil in the loading cylinder's rod chamber to flow through the second check valve to the synchronizer. At this point, the first pump operates, driving the hydraulic oil in the first oil tank to flow toward the third and fourth check valves. Simultaneously, the hydraulic oil in the loading cylinder's rod chamber flows out, creating pressure on both ends of the fourth check valve, preventing the hydraulic oil from flowing through the fourth check valve. Thereby, the first pump body can drive the hydraulic oil to flow through the third one-way valve and then into the rodless chamber of the loading cylinder.

[0039] In the above technical solution, further, the drive assembly includes: a second oil tank; a second pump body, the inlet of the second pump body is connected to the second oil tank; a second reversing valve, the second reversing valve is respectively connected to the outlet of the second pump body and the second oil tank, and the second reversing valve is also used to be connected with the rodless chambers of multiple hydraulic cylinders and the rod chambers of multiple hydraulic cylinders; wherein, the second reversing valve includes a first working position, a second working position and a third working position, when the second reversing valve is in the first working position, the hydraulic oil flowing out of the second pump body can enter the rodless chamber of the hydraulic cylinder, when the second reversing valve is in the second working position, the hydraulic oil flowing out of the second pump body can flow into the rod chamber of the hydraulic cylinder, when the second reversing valve is in the third working position, the hydraulic cylinder and the oil tank are in a disconnected state.

[0040] In this technical solution, the drive assembly includes a second oil tank and a second pump body, wherein the second oil tank is used to contain hydraulic oil, and the second pump body is used to drive the hydraulic oil in the second oil tank to move. Specifically, the inlet of the second pump body is connected to the second oil tank.

[0041] Furthermore, the drive assembly includes a second reversing valve, which is respectively connected to the outlet of the second pump body, the second oil tank, and the rod chambers and rodless chambers of the plurality of hydraulic cylinders. In other words, driven by the second pump body, the hydraulic oil in the second oil tank flows through the second reversing valve to the rod chambers or the rodless chambers of the hydraulic cylinders. The hydraulic oil then flows back through the second reversing valve to the second oil tank.

[0042] Specifically, the second reversing valve includes a first working position, a second working position, and a third working position. When the second reversing valve is in the first working position, the hydraulic oil flowing out of the outlet of the second pump body can flow into the rodless chamber of the hydraulic cylinder, thereby driving the piston rod of the hydraulic cylinder to extend and squeezing out the hydraulic oil in the rod chamber of the hydraulic cylinder, causing the hydraulic oil to flow through the second reversing valve and flow back into the second oil tank. Accordingly, when the second reversing valve is in the second working position, the hydraulic oil flowing out of the outlet of the second pump body can flow into the rod chamber of the hydraulic cylinder, thereby driving the piston rod of the hydraulic cylinder to retract and squeezing out the hydraulic oil in the rodless chamber of the hydraulic cylinder, causing the hydraulic oil to flow through the second reversing valve and flow back into the second oil tank.

[0043] Furthermore, when the second reversing valve is in the third working position, the hydraulic cylinder and the oil tank are disconnected, that is, the hydraulic oil in the rod chamber and the rodless chamber of the hydraulic cylinder cannot flow, so that the hydraulic oil in the hydraulic cylinder maintains the current pressure.

[0044] Furthermore, the drive assembly may further include multiple hydraulic locks, each corresponding to a plurality of hydraulic cylinders. Specifically, the hydraulic lock is connected between the second reversing valve and the hydraulic cylinder to lock the flow of hydraulic oil in the hydraulic cylinder when the second pump body stops operating, thereby preventing the hydraulic oil from flowing freely and affecting the test data.

[0045] In the above technical solution, the hydraulic cylinder loading test system further includes: multiple first pressure sensors, which are connected one-to-one with the rodless cavities of multiple hydraulic cylinders; and multiple second pressure sensors, which are connected one-to-one with the rod cavities of multiple hydraulic cylinders.

[0046] In this technical solution, the hydraulic cylinder loading test system further includes a plurality of first pressure sensors and a plurality of second pressure sensors. The plurality of first pressure sensors are connected to the rodless chambers of the plurality of hydraulic cylinders in a one-to-one correspondence, so that the pressure of the rodless chambers of the hydraulic cylinders is detected by the first pressure sensors to determine the sealing condition of the rodless chambers of the hydraulic cylinders. Accordingly, the plurality of second pressure sensors are connected to the rod chambers of the plurality of hydraulic cylinders in a one-to-one correspondence, so that the pressure of the rod chambers of the hydraulic cylinders is detected by the second pressure sensors to determine the sealing condition of the rod chambers of the hydraulic cylinders.

[0047] Specifically, during the test, if the value detected by the first pressure sensor suddenly decreases while the value detected by the second pressure sensor remains unchanged, this indicates leakage in the rodless chamber. Similarly, if the value detected by the second pressure sensor suddenly decreases while the value detected by the first pressure sensor remains unchanged, this indicates leakage in the rod chamber. Furthermore, if the values ​​detected by both the first and second pressure sensors change significantly, and their values ​​are close to each other, this indicates piston leakage.

[0048] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0050] Figure 1 A structural schematic diagram of a hydraulic cylinder loading test system according to an embodiment of the present invention is shown.

[0051] in, Figure 1 The corresponding relationship between the reference numerals and component names is as follows:

[0052] 100 Hydraulic cylinder loading test system, 102 drive assembly, 104 loading part, 106 loading cylinder, 108 loading piston rod, 110 synchronization assembly, 112 synchronization part, 114 connecting part, 116 stop valve, 118 first reversing valve, 120 first overflow valve, 122 second overflow valve, 124 first one-way valve, 126 second one-way valve, 128 first oil tank, 130 first pump body, 132 third one-way valve, 134 fourth one-way valve, 136 second oil tank, 138 second pump body, 140 second reversing valve, 142 first pressure sensor, 144 second pressure sensor, 146 switch valve, 148 hydraulic lock, 200 hydraulic cylinder. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0055] Refer to the following Figure 1 A hydraulic cylinder loading test system according to some embodiments of the present invention is described.

[0056] like Figure 1As shown, the present invention proposes a hydraulic cylinder loading test system 100, which is used for performance testing of a hydraulic cylinder 200. The hydraulic cylinder loading test system 100 includes a driving assembly 102, which is used to connect with multiple hydraulic cylinders 200 to drive the piston rods of the multiple hydraulic cylinders 200 to extend and retract; the hydraulic cylinder loading test system 100 also includes multiple loading parts 104, which are connected to the multiple hydraulic cylinders 200 in a one-to-one correspondence and are used to provide loads for the hydraulic cylinders 200. Specifically, the loading part 104 includes a loading cylinder 106 and a loading piston rod 108, one end of the loading piston rod 108 extends into the loading cylinder 106, and the other end of the loading piston rod 108 is connected to the piston rod of the hydraulic cylinder 200. Furthermore, the hydraulic cylinder loading test system 100 also includes a synchronization component 110, which is connected to the rod chambers of multiple loading cylinders 106 and the rodless chambers of multiple loading cylinders 106, and is used to synchronize the hydraulic oil flow in the rod chambers of multiple loading cylinders 106 during the extension of multiple loading piston rods 108, or to synchronize the hydraulic oil flow in the rodless chambers of multiple loading cylinders 106 during the retraction of multiple loading piston rods 108.

[0057] The hydraulic cylinder loading test system 100 provided by the present invention can be used to test the performance of a hydraulic cylinder 200, specifically the operating performance of a hydraulic cylinder 200 of a hydraulic support in engineering equipment. Specifically, the hydraulic cylinder loading test system 100 includes a drive assembly 102, which can be connected to multiple hydraulic cylinders 200 to be tested. Specifically, the drive assembly 102 drives the hydraulic oil within the hydraulic cylinders 200 to cause the piston rods of the hydraulic cylinders 200 to extend and retract, simulating the actual piston rod extension and retraction process of the hydraulic cylinders 200 during operation.

[0058] Furthermore, the hydraulic cylinder loading test system 100 includes multiple loading units 104, which are used to connect to the multiple hydraulic cylinders 200 in a one-to-one correspondence to simulate the loads that the hydraulic cylinders 200 bear during actual operation. Specifically, the loading unit 104 includes a loading cylinder 106 and a loading piston rod 108. One end of the loading piston rod 108 extends into the loading cylinder 106, and the other end of the loading piston rod 108 is connected to the piston rod of the hydraulic cylinder 200 to be tested. Specifically, the loading piston rod 108 can be hinged to ensure the flexibility of the relative movement between the loading piston rod 108 and the piston rod of the hydraulic cylinder 200 to be tested.

[0059] It is understandable that hydraulic oil can be input into the loading cylinder 106 to apply a force to the loading piston rod 108, and then the force is transmitted to the piston rod of the hydraulic cylinder 200 to be tested through the loading piston rod 108, thereby simulating the load on the piston rod of the hydraulic cylinder 200 during actual operation, thereby ensuring that the hydraulic cylinder loading test system 100 can effectively simulate the actual working process of the hydraulic cylinder 200 and improve the test effect.

[0060] Furthermore, the hydraulic cylinder loading test system 100 includes a synchronization assembly 110 that is simultaneously connected to the rod chambers and rodless chambers of the multiple loading cylinders 106. That is, during operation of the loading cylinders 106, hydraulic oil flowing out of the rod chambers or the rodless chambers of the loading cylinders 106 can enter the synchronization assembly 110. Furthermore, the synchronization assembly 110 synchronizes the flow rates of the hydraulic oil in the rod chambers of the multiple loading cylinders 106 as the multiple loading piston rods 108 extend, i.e., as the hydraulic oil in the rod chambers of the multiple loading cylinders 106 flows into the synchronization assembly 110. Similarly, during retraction of the multiple loading piston rods 108, i.e., as the hydraulic oil in the rodless chambers of the multiple loading cylinders 106 flows into the synchronization assembly 110, the synchronization assembly 110 synchronizes the flow rates of the hydraulic oil flowing out of the rodless chambers. In other words, during the extension and retraction of the loading piston rods 108, the synchronization assembly 110 ensures that the movement speeds of the multiple loading piston rods 108 remain consistent, thereby achieving synchronized operation of the multiple loading units 104. Furthermore, the movement of the piston rods of the multiple hydraulic cylinders 200 connected to the multiple loading piston rods 108 remains synchronized.

[0061] It is understood that when conducting comparative tests on multiple hydraulic cylinders 200 with different parameters, the synchronization component 110 synchronizes the movement of the piston rods of the multiple hydraulic cylinders 200, that is, the multiple hydraulic cylinders 200 with different parameters operate synchronously. Thus, by observing the operating status of each hydraulic cylinder 200, a comparative result of the multiple hydraulic cylinders 200 can be obtained without having to record and calculate the operating data of each hydraulic cylinder 200, thereby improving test efficiency. For example, the hydraulic cylinder loading test system 100 can be used to conduct comparative tests on the sealing effects of multiple hydraulic cylinders 200 including different seals. By using the synchronization component 110, the multiple hydraulic cylinders 200 operate synchronously, and the sealing effect of each hydraulic cylinder 200 is observed simultaneously. The seal equipped with the hydraulic cylinder 200 that leaks first has the worst sealing effect, while the seal equipped with the hydraulic cylinder 200 that leaks last has the best sealing effect.

[0062] The hydraulic cylinder loading test system 100 provided by the present invention is connected to multiple hydraulic cylinders 200 to be tested via a drive assembly 102 and a loading unit 104, thereby simulating the expansion and contraction and loads of the hydraulic cylinders 200 to be tested during actual operation, thereby ensuring that the hydraulic cylinder loading test system 100 can effectively simulate the actual operation of the hydraulic cylinders 200 and improve the test effect. Furthermore, by providing a synchronization assembly 110, the movement speed of the multiple loading piston rods 108 can be ensured to remain consistent, that is, the multiple loading units 104 are synchronized, and the movement process of the piston rods of the multiple hydraulic cylinders 200 connected to the multiple loading piston rods 108 is synchronized. When conducting a comparative test on multiple hydraulic cylinders 200 with different parameters, the synchronization assembly 110 synchronizes the movement process of the piston rods of the multiple hydraulic cylinders 200. By observing the operating status of each hydraulic cylinder 200, the comparison results of the multiple hydraulic cylinders 200 can be obtained without recording and calculating the operating data of each hydraulic cylinder 200, thereby improving the test efficiency.

[0063] In the above embodiment, further, Figure 1 As shown, the synchronization assembly 110 includes a plurality of synchronization members 112 and a connecting member 114, wherein the plurality of synchronization members 112 are connected one-to-one with the plurality of loading parts 104, and the inlet of the synchronization member 112 is connected with the rod cavity and the rodless cavity of the plurality of loading cylinders 106; the connecting member 114 is connected with the plurality of synchronization members 112 to ensure that the plurality of synchronization members 112 operate synchronously so that the flow of the hydraulic oil flowing through the plurality of synchronization members 112 remains synchronized.

[0064] In this embodiment, the synchronization assembly 110 may include a plurality of synchronization members 112 connected in a one-to-one correspondence with the plurality of loading portions 104, and the inlet of each synchronization member 112 is connected to the rod chamber and the rodless chamber of a loading cylinder 106. That is, during the operation of the hydraulic cylinder loading test system 100, when the loading piston rod 108 of the hydraulic cylinder loading test system 100 retracts, the hydraulic oil in the rodless chamber of the loading cylinder 106 can enter the synchronization member 112 and drive the synchronization member 112 to operate. Correspondingly, when the loading piston rod 108 of the hydraulic cylinder loading test system 100 extends, the hydraulic oil in the rod chamber of the loading cylinder 106 can enter the synchronization member 112 and drive the synchronization member 112 to operate.

[0065] Furthermore, the synchronization component 110 also includes a connecting member 114, which is connected to multiple synchronization members 112 at the same time, so that the setting of the connecting member 114 can ensure that the multiple synchronization members 112 run synchronously. That is, during the operation of the hydraulic cylinder loading test system 100, when the loading cylinder 106 drives the synchronization member 112 to run, the connecting member 114 connected by multiple synchronization members 112 enables the multiple synchronization members 112 to run synchronously, thereby enabling the multiple loading piston rods 108 to be synchronously extended and retracted, and then enabling the piston rods of the multiple hydraulic cylinders 200 connected to the loading piston rod 108 to be synchronously extended and retracted, so as to realize the synchronous operation of the multiple hydraulic cylinders 200.

[0066] Furthermore, the synchronizer 112 includes a shell and a rotating shaft and fan blades arranged in the shell, wherein an inlet is opened on the shell, the inlet is used for the flow of hydraulic oil, and the inlet is connected to the rod cavity and the rodless cavity of multiple loading cylinders 106; the fan blades are sleeved on the rotating shaft, and when hydraulic oil flows through the shell, the hydraulic oil can drive the fan blades to rotate, so that the fan blades drive the rotating shaft to rotate; further, the connecting member 114 includes a synchronous belt, which is connected to the rotating shafts of multiple synchronizers 112.

[0067] Specifically, the synchronizer 112 includes a shell, and an inlet is opened on the shell. Through the setting of the inlet, during the operation of the loading part 104, the hydraulic oil flowing out of the rod chamber of the loading cylinder 106 or the rodless chamber of the loading cylinder 106 can enter the shell of the synchronizer 112, so as to realize the operation of the synchronizer 112 driven by the hydraulic oil.

[0068] Furthermore, the synchronizer 112 includes a rotating shaft and blades disposed within the housing. The blades are sleeved on the rotating shaft. When hydraulic oil flows through the housing, the hydraulic oil drives the blades to move, thereby causing the blades to rotate the rotating shaft. In other words, the synchronizer 112 is driven by the hydraulic oil.

[0069] Furthermore, the connecting member 114 may include a synchronous belt, which is connected to the rotating shafts of multiple synchronous members 112 at the same time, so that the rotating shafts of multiple synchronous members 112 can maintain synchronous rotation under the action of the synchronous belt, and then the fan blades connected to the rotating shafts can maintain synchronous rotation, and then the flow of hydraulic oil in the shell can be synchronized, that is, the flow of hydraulic oil in the loading cylinder 106 is synchronized, and finally the synchronous operation of multiple hydraulic cylinders 200 is achieved.

[0070] In any of the above embodiments, further, Figure 1 As shown, the testing device further includes a plurality of stop valves 116 , which are connected to the plurality of synchronizers 112 in a one-to-one correspondence, and the stop valves 116 are communicated with the outlets of the synchronizers 112 .

[0071] In this embodiment, a shutoff valve 116 is further provided at the outlet of the synchronizer 112. The number of shutoff valves 116 is the same as the number of synchronizers 112, with multiple shutoff valves 116 corresponding one to each synchronizer 112. In other words, a shutoff valve 116 is provided at the outlet of each synchronizer 112. The provision of the shutoff valves 116 allows the hydraulic oil at the outlet of the synchronizer 112 to be switched on and off, thereby enabling independent control of the multiple synchronizers 112, and thus, independent control of the multiple test channels.

[0072] Specifically, during the simultaneous sealing test of multiple hydraulic cylinders 200, when one of the hydraulic cylinders 200 leaks, it indicates that the test of the hydraulic cylinder 200 has ended. At this time, the shut-off valve 116 corresponding to the hydraulic cylinder 200 can be controlled to be shut off, so that the test channel of the hydraulic cylinder 200 is shut off, so as to achieve independent control of the test channel of the hydraulic cylinder 200 without affecting the test channel of the pneumatic hydraulic cylinder 200.

[0073] Furthermore, the outlet of the synchronizer 112 can be connected to the rod chamber and the rodless chamber of the loading cylinder 106, and a switch valve 146 can be set between the outlet of the synchronizer 112 and the loading cylinder 106. When the test of a hydraulic cylinder 200 is completed, the stop valve 116 corresponding to the hydraulic cylinder 200 is cut off, and the switch valve 146 corresponding to the hydraulic cylinder 200 is opened at the same time to avoid the continuous increase of pressure in the test channel corresponding to the hydraulic cylinder 200, thereby ensuring the safety of the test channel.

[0074] In any of the above embodiments, further, Figure 1 As shown, the hydraulic cylinder loading test system 100 also includes a first reversing valve 118, a first overflow valve 120 and a second overflow valve 122, wherein the first reversing valve 118 is connected to multiple stop valves 116; the first overflow valve 120 is connected to the first reversing valve 118; the second overflow valve 122 is connected to the first reversing valve 118; wherein the first reversing valve 118 is used to control the first overflow valve 120 to be connected to the rodless chamber of the loading cylinder 106, or to control the second overflow valve 122 to be connected to the rod chamber of the loading cylinder 106.

[0075] In this embodiment, the hydraulic cylinder loading test system 100 further includes a first reversing valve 118, which is connected to a plurality of shut-off valves 116. That is, the hydraulic oil flowing out of the outlets of the plurality of synchronizers 112 passes through the corresponding shut-off valves 116, flows into the first reversing valve 118, and then flows to different channels through the reversing of the first reversing valve 118.

[0076] Furthermore, the hydraulic cylinder loading test system 100 also includes a first overflow valve 120 and a second overflow valve 122. The first overflow valve 120 and the second overflow valve 122 are both connected to the first reversing valve 118, and through the reversing of the first reversing valve 118, the first overflow valve 120 can be connected to the rodless chamber of the loading cylinder 106, or the second overflow valve 122 can be connected to the rod chamber of the loading cylinder 106.

[0077] By setting the first overflow valve 120, the pressure of the hydraulic oil in the rodless chamber of the loading cylinder 106 can be controlled, so that the load of the loading piston rod 108 can be controlled when the loading piston rod 108 retracts, thereby realizing the control of the load of the piston rod during the extension process of the piston rod of the hydraulic cylinder 200 to be tested.

[0078] Accordingly, by controlling the second overflow valve 122, the pressure of the hydraulic oil in the rod chamber of the loading cylinder 106 can be controlled, thereby controlling the load of the loading piston rod 108 when the loading piston rod 108 is extended, and further controlling the load of the piston rod during the retraction process of the piston rod of the hydraulic cylinder 200 to be tested.

[0079] For example, during the extension of the piston rod of the hydraulic cylinder 200 to be tested, the loading piston rod 108 retracts into the loading cylinder 106. At the same time, the first reversing valve 118 is switched so that the rodless chamber of the loading cylinder 106 is connected to the first relief valve 120. The first relief valve 120 is then adjusted to 20 kPa. At this time, the load applied to the piston rod of the hydraulic cylinder 200 to be tested during the extension process is 20 kPa.

[0080] In any of the above embodiments, further, Figure 1 As shown, the hydraulic cylinder loading test system 100 also includes a first one-way valve 124 and a second one-way valve 126, wherein the first one-way valve 124 is connected between the rodless chamber and the inlet of the loading cylinder 106, and the conduction direction of the first one-way valve 124 is from the rodless chamber of the loading cylinder 106 to the inlet; the second one-way valve 126 is connected between the rod chamber and the inlet of the loading cylinder 106, and the conduction direction of the second one-way valve 126 is from the rod chamber of the loading cylinder 106 to the inlet.

[0081] In this embodiment, a first one-way valve 124 is provided between the rodless chamber of the loading cylinder 106 and the inlet of the synchronizer 112. Accordingly, a second one-way valve 126 is provided between the rod chamber of the loading cylinder 106 and the inlet of the synchronizer 112. The first one-way valve 124 is configured to direct flow from the rodless chamber of the loading cylinder 106 to the synchronizer 112, while the second one-way valve 126 is configured to direct flow from the rod chamber of the loading cylinder 106 to the synchronizer 112.

[0082] During the retraction of the loading piston rod 108 of the loading cylinder 106, the hydraulic oil in the rodless chamber of the loading cylinder 106 can flow to the synchronizer 112 through the first one-way valve 124. At the same time, due to the setting of the second one-way valve 126, the hydraulic oil flowing out of the rodless chamber cannot return to the rod chamber of the loading cylinder 106, thereby ensuring the correct flow direction of the hydraulic oil, avoiding changes in the pressure of the hydraulic oil, and ensuring the accuracy of the load generated by the loading part 104.

[0083] At the same time, by setting the first one-way valve 124 and the second one-way valve 126, while achieving the correct flow direction of the hydraulic oil, the piping structure of the hydraulic cylinder loading test system 100 can be simplified, avoiding the hydraulic cylinder loading test system 100 from being too complicated.

[0084] In any of the above embodiments, further, Figure 1 As shown, the hydraulic cylinder loading test system 100 also includes a first oil tank 128 and a first pump body 130. The inlet of the first pump body 130 is connected to the first oil tank 128, and the outlet of the first pump body 130 is connected to the rod chambers of multiple loading cylinders 106 and the rodless chambers of the loading cylinders 106.

[0085] In this embodiment, the hydraulic cylinder loading test system 100 further includes a first oil tank 128 and a first pump body 130 , wherein the first oil tank 128 is used to store hydraulic oil, and the hydraulic oil can be driven by the first pump body 130 .

[0086] Specifically, the inlet of the first pump body 130 is connected to the first oil tank 128, and the outlet of the first pump body 130 is connected to the rod chambers and rodless chambers of the multiple loading cylinders 106. Through the first oil tank 128 and the first pump body 130, oil can be supplied to the rod chambers or the rodless chambers of the loading cylinders 106. During the test, when the loading piston rod 108 retracts, the hydraulic oil in the rodless chamber of the loading cylinder 106 flows toward the first relief valve 120. At this time, hydraulic oil is delivered to the rod chamber of the loading cylinder 106 through the first oil tank 128 and the first pump body 130, ensuring that the loading cylinder 106 remains filled with fluid at all times, thereby ensuring the stable operation of the hydraulic cylinder loading test system 100.

[0087] Furthermore, the hydraulic cylinder loading test system 100 also includes a third one-way valve 132 and a fourth one-way valve 134, wherein the third one-way valve 132 is connected between the outlet of the first pump body 130 and the rodless chamber of the loading cylinder 106, and the conduction direction of the third one-way valve 132 is from the first pump body 130 to the loading cylinder 106; the fourth one-way valve 134 is connected between the outlet of the first pump body 130 and the rod chamber of the loading cylinder 106, and the conduction direction of the fourth one-way valve 134 is from the first pump body 130 to the loading cylinder 106.

[0088] Specifically, the hydraulic cylinder loading test system 100 also includes a third one-way valve 132 and a fourth one-way valve 134, wherein the third one-way valve 132 is connected between the outlet of the first pump body 130 and the rodless chamber of the loading cylinder 106, and the conduction direction of the third one-way valve 132 is from the first pump body 130 to the loading cylinder 106.

[0089] Correspondingly, the fourth one-way valve 134 is connected between the outlet of the first pump body 130 and the rod chamber of the loading cylinder 106 , and the conducting direction of the fourth one-way valve 134 is from the first pump body 130 to the loading cylinder 106 .

[0090] During testing, when the hydraulic rod of the hydraulic cylinder 200 under test extends, the loading piston rod 108 retracts, causing the hydraulic oil in the rodless chamber of the loading cylinder 106 to flow through the first check valve 124 to the synchronizer 112. At this point, the first pump 130 operates, driving the hydraulic oil in the first oil tank 128 to flow toward the third and fourth check valves 132, 134. Simultaneously, as the hydraulic oil in the rodless chamber of the loading cylinder 106 flows out, the hydraulic oil on both sides of the third check valve 132 is pressurized, preventing the hydraulic oil from flowing through the third check valve 132. This allows the first pump 130 to drive the hydraulic oil through the fourth check valve 134 and into the rod chamber of the loading cylinder 106. Conversely, when the hydraulic rod of the hydraulic cylinder 200 under test retracts, the loading piston rod 108 extends, causing the hydraulic oil in the rod chamber of the loading cylinder 106 to flow through the second check valve 126 to the synchronizer 112. At this time, the first pump body 130 is running, driving the hydraulic oil in the first oil tank 128 to flow to the third check valve 132 and the fourth check valve 134. At the same time, since the hydraulic oil in the rod chamber of the loading cylinder 106 flows out, the hydraulic oil at both ends of the fourth check valve 134 is pressurized, so the hydraulic oil does not flow through the fourth check valve 134. As a result, the first pump body 130 can drive the hydraulic oil to flow through the third check valve 132 and then into the rodless chamber of the loading cylinder 106.

[0091] In any of the above embodiments, further, Figure 1As shown, the drive assembly 102 includes a second oil tank 136 and a second pump body 138, and the inlet of the second pump body 138 is connected to the second oil tank 136; further, the drive assembly 102 also includes a second reversing valve 140, and the second reversing valve 140 is respectively connected to the outlet of the second pump body 138 and the second oil tank 136, and the second reversing valve 140 is also used to be connected with the rodless chambers of multiple hydraulic cylinders 200 and the rod chambers of multiple hydraulic cylinders 200; wherein, the second reversing valve 140 includes a first working position, a second working position and a third working position, when the second reversing valve 140 is in the first working position, the hydraulic oil flowing out of the second pump body 138 can enter the rodless chamber of the hydraulic cylinder 200, when the second reversing valve 140 is in the second working position, the hydraulic oil flowing out of the second pump body 138 can flow into the rod chamber of the hydraulic cylinder 200, and when the second reversing valve 140 is in the third working position, the hydraulic cylinder 200 and the oil tank are in a disconnected state.

[0092] In this embodiment, the drive assembly 102 includes a second oil tank 136 and a second pump body 138 , wherein the second oil tank 136 is used to contain hydraulic oil, and the second pump body 138 is used to drive the hydraulic oil in the second oil tank 136 . Specifically, the inlet of the second pump body 138 is connected to the second oil tank 136 .

[0093] Furthermore, the drive assembly 102 further includes a second reversing valve 140, which is respectively connected to the outlet of the second pump body 138, the second oil tank 136, and the rod chambers and rodless chambers of the plurality of hydraulic cylinders 200. That is, driven by the second pump body 138, the hydraulic oil in the second oil tank 136 flows through the second reversing valve 140 to the rod chambers or the rodless chambers of the hydraulic cylinders 200. Then, the hydraulic oil in the rodless chambers or the rod chambers of the hydraulic cylinders 200 flows through the second reversing valve 140 back to the second oil tank 136.

[0094] Specifically, the second reversing valve 140 includes a first working position, a second working position, and a third working position. When the second reversing valve 140 is in the first working position, the hydraulic oil flowing out of the outlet of the second pump body 138 can flow into the rodless chamber of the hydraulic cylinder 200, thereby driving the piston rod of the hydraulic cylinder 200 to extend and squeezing out the hydraulic oil in the rod chamber of the hydraulic cylinder 200, causing the hydraulic oil to flow through the second reversing valve 140 and return to the second oil tank 136. Correspondingly, when the second reversing valve 140 is in the second working position, the hydraulic oil flowing out of the outlet of the second pump body 138 can flow into the rod chamber of the hydraulic cylinder 200, thereby driving the piston rod of the hydraulic cylinder 200 to retract and squeezing out the hydraulic oil in the rodless chamber of the hydraulic cylinder 200, causing the hydraulic oil to flow through the second reversing valve 140 and return to the second oil tank 136.

[0095] Furthermore, when the second reversing valve 140 is in the third working position, the hydraulic cylinder 200 and the oil tank are in a disconnected state, that is, the hydraulic oil in the rod chamber and the rodless chamber of the hydraulic cylinder 200 cannot flow, so that the hydraulic oil in the hydraulic cylinder 200 maintains the current pressure.

[0096] Furthermore, the drive assembly 102 may further include a plurality of hydraulic locks 148, each corresponding to a plurality of hydraulic cylinders 200. Specifically, the hydraulic locks 148 are connected between the second reversing valve 140 and the hydraulic cylinders 200 to lock the flow of hydraulic oil in the hydraulic cylinders 200 when the second pump body 138 stops operating, thereby preventing the hydraulic oil from flowing freely and affecting the test data.

[0097] Furthermore, the hydraulic cylinder loading test system 100 also includes multiple first pressure sensors 142 and multiple second pressure sensors 144, wherein the multiple first pressure sensors 142 are connected one-to-one with the rodless cavities of the multiple hydraulic cylinders 200; and the multiple second pressure sensors 144 are connected one-to-one with the rod cavities of the multiple hydraulic cylinders 200.

[0098] Specifically, the hydraulic cylinder loading test system 100 further includes a plurality of first pressure sensors 142 and a plurality of second pressure sensors 144. The plurality of first pressure sensors 142 are connected in a one-to-one correspondence with the rodless chambers of the plurality of hydraulic cylinders 200. The pressure of the rodless chambers of the hydraulic cylinders 200 is detected by the first pressure sensors 142 to determine the sealing condition of the rodless chambers of the hydraulic cylinders 200. Accordingly, the plurality of second pressure sensors 144 are connected in a one-to-one correspondence with the rod chambers of the plurality of hydraulic cylinders 200. The pressure of the rod chambers of the hydraulic cylinders 200 is detected by the second pressure sensors 144 to determine the sealing condition of the rod chambers of the hydraulic cylinders 200.

[0099] Specifically, during the test, if the value detected by first pressure sensor 142 suddenly decreases while the value detected by second pressure sensor 144 remains unchanged, this indicates leakage in the rodless chamber. Similarly, if the value detected by second pressure sensor 144 suddenly decreases while the value detected by first pressure sensor 142 remains unchanged, this indicates leakage in the rod chamber. Furthermore, if the values ​​detected by both first and second pressure sensors 142, 144, change significantly, and their values ​​are close to each other, this indicates piston leakage.

[0100] Furthermore, the first oil tank 128 and the second oil tank 136 are both provided with corresponding cooling systems and heating systems to ensure the temperature of the hydraulic oil during the operation of the hydraulic cylinder loading test system 100 and to ensure that the hydraulic cylinder loading test system 100 can operate continuously and stably.

[0101] The specific test process is as follows: The second pump 138 is controlled to operate, and the second reversing valve 140 is controlled to be in the first operating position. The hydraulic oil in the second oil tank 136 flows through the second reversing valve 140 and the corresponding hydraulic lock 148 of each hydraulic cylinder 200 to the rodless chamber of the hydraulic cylinder 200, causing the piston rod of the hydraulic cylinder 200 to extend. Simultaneously, the piston rod of the hydraulic cylinder 200 acts on the loading piston rod 108 of the loading unit 104, causing the loading piston rod 108 to retract. The hydraulic oil in the rodless chamber of the loading cylinder 106 flows through the first check valve 124 to the synchronizer 112, then through the stop valve 116 to the first reversing valve 118. After passing through the first reversing valve 118, the oil flows through the first relief valve 120 and returns to the first oil tank 128. At this point, the pressure of the hydraulic oil in the rodless chamber of the loading cylinder 106 is adjusted by the first relief valve 120, thereby controlling the load on the piston rod of the hydraulic cylinder 200.

[0102] Furthermore, the second reversing valve 140 is controlled to switch to its second working position. The hydraulic oil in the second oil tank 136 flows through the second reversing valve 140 and the corresponding hydraulic lock 148 of each hydraulic cylinder 200, and then flows into the rod chamber of each hydraulic cylinder 200, causing the piston rod of each hydraulic cylinder 200 to retract. Simultaneously, the piston rod of each hydraulic cylinder 200 acts on the loading piston rod 108 of the loading unit 104, causing the loading piston rod 108 to extend. The hydraulic oil in the rod chamber of the loading cylinder 106 flows through the second check valve 126 to the synchronizer 112, then through the shut-off valve 116 to the first reversing valve 118. After passing through the first reversing valve 118, the oil flows through the second relief valve 122 and returns to the first oil tank 128. At this point, the pressure of the hydraulic oil in the rod chamber of the loading cylinder 106 is adjusted by the second relief valve 122, thereby controlling the load on the piston rod of the hydraulic cylinder 200.

[0103] During the test, the second reversing valve 140 can be controlled to reverse according to a preset frequency to simulate the extension and retraction process of the hydraulic cylinder 200 during actual operation. When the value of the first sensor or the second sensor of the hydraulic cylinder 200 changes significantly, it indicates that the test of the hydraulic cylinder 200 is completed, and the stop valve 116 corresponding to the hydraulic cylinder 200 is controlled to be cut off, the test channel of the hydraulic cylinder 200 is closed, and the test channels of the remaining hydraulic cylinders 200 continue to run until the test is completed.

[0104] Furthermore, the first oil tank 128 and the second oil tank 136 are both provided with corresponding cooling systems and heating systems to ensure the temperature of the hydraulic oil during the operation of the hydraulic cylinder loading test system 100 and to ensure that the hydraulic cylinder loading test system 100 can operate continuously and stably.

[0105] In the present invention, the term "plurality" refers to at least two or more than two, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0106] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0107] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic cylinder loading test system, used for performance testing of hydraulic cylinders, characterized in that: The hydraulic cylinder loading test system comprises: A driving assembly, used to connect with the plurality of hydraulic cylinders to drive the piston rods of the plurality of hydraulic cylinders to extend and retract; A plurality of loading parts, each of which is connected to the plurality of hydraulic cylinders in a one-to-one correspondence and is used to provide loads for the hydraulic cylinders, wherein the loading parts include: Loading cylinder: a loading piston rod, one end of which extends into the loading cylinder and the other end of which is connected to the piston rod of the hydraulic cylinder; a synchronization assembly, the synchronization assembly being in communication with the rod cavities of the plurality of loading cylinders and the rodless cavities of the plurality of loading cylinders, and being configured to synchronize the flow of hydraulic oil in the rod cavities of the plurality of loading cylinders during the extension of the plurality of loading piston rods, or synchronize the flow of hydraulic oil in the rodless cavities of the plurality of loading cylinders during the retraction of the plurality of loading piston rods; The synchronization component includes: a plurality of synchronizers, the plurality of synchronizers being connected to the plurality of loading parts in a one-to-one correspondence, the inlets of the synchronizers being in communication with the rod chambers and the rodless chambers of the plurality of loading cylinders; a connecting member connected to the plurality of synchronizers, and configured to ensure that the plurality of synchronizers operate synchronously, so that the flow rates of the hydraulic oil flowing through the plurality of synchronizers remain synchronized; The synchronizer is a hydraulic motor; The hydraulic cylinder loading test system also includes: a first one-way valve connected between the rodless chamber of the loading cylinder and the inlet, wherein the first one-way valve is connected in a direction from the rodless chamber of the loading cylinder to the inlet; a second one-way valve connected between the rod chamber of the loading cylinder and the inlet, wherein the second one-way valve is connected in a direction from the rod chamber of the loading cylinder to the inlet; a third one-way valve connected between the outlet of the first pump body and the rodless chamber of the loading cylinder, the conducting direction of the third one-way valve being from the first pump body to the loading cylinder; a fourth one-way valve connected between the outlet of the first pump body and the rod chamber of the loading cylinder, the fourth one-way valve being oriented from the first pump body to the loading cylinder; A switch valve is provided between the outlet of the synchronizer and the inlets of the third one-way valve and the fourth one-way valve.

2. The hydraulic cylinder loading test system according to claim 1, characterized in that: The synchronizer comprises: a housing, wherein the housing is provided with the inlet for the hydraulic oil to flow in, the inlet being in communication with the rod chambers and the rodless chambers of the plurality of loading cylinders; a rotating shaft, disposed in the housing; The fan blades are sleeved on the rotating shaft. When hydraulic oil flows through the housing, the hydraulic oil can drive the fan blades to rotate, so that the fan blades drive the rotating shaft to rotate; The connecting piece includes: A synchronous belt is connected to the rotating shafts of the multiple synchronous members.

3. The hydraulic cylinder loading test system according to claim 1, characterized in that: Also includes: A plurality of stop valves are connected to the plurality of synchronizers in a one-to-one correspondence, and the stop valves are communicated with outlets of the synchronizers.

4. The hydraulic cylinder loading test system according to claim 3, characterized in that: Also includes: a first reversing valve connected to the plurality of stop valves; a first overflow valve connected to the first reversing valve; a second overflow valve connected to the first reversing valve; The first reversing valve is used to control the first relief valve to be connected to the rodless chamber of the loading cylinder, or to control the second relief valve to be connected to the rod chamber of the loading cylinder.

5. The hydraulic cylinder loading test system according to any one of claims 1 to 4, characterized in that: Also includes: First fuel tank; The inlet of the first pump body is communicated with the first oil tank, and the outlet of the first pump body is communicated with the rod chambers of the plurality of loading cylinders and the rodless chambers of the loading cylinders.

6. The hydraulic cylinder loading test system according to any one of claims 1 to 4, characterized in that: The drive assembly includes: Second fuel tank; a second pump body, wherein the inlet of the second pump body is connected to the second oil tank; a second reversing valve, the second reversing valve being connected to the outlet of the second pump body and the second oil tank respectively, and the second reversing valve being further used to be connected to the rodless chambers of the plurality of hydraulic cylinders and the rod chambers of the plurality of hydraulic cylinders; In which, the second reversing valve includes a first working position, a second working position and a third working position. When the second reversing valve is in the first working position, the hydraulic oil flowing out of the second pump body can enter the rodless chamber of the hydraulic cylinder. When the second reversing valve is in the second working position, the hydraulic oil flowing out of the second pump body can flow into the rod chamber of the hydraulic cylinder. When the second reversing valve is in the third working position, the hydraulic cylinder and the oil tank are in a disconnected state.

7. The hydraulic cylinder loading test system according to claim 6, characterized in that: Also includes: a plurality of first pressure sensors, each of the plurality of first pressure sensors being connected to the rodless chambers of the plurality of hydraulic cylinders in a one-to-one correspondence; A plurality of second pressure sensors are connected to the rod chambers of the plurality of hydraulic cylinders in a one-to-one correspondence.

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