Hydraulic system energy accumulator and energy accumulator pressure detection method

Abstract

The invention relates to a hydraulic system energy accumulator and an energy accumulator pressure detection method, and belongs to the technical field of aviation equipment vibration isolation installation. The energy accumulator comprises an energy accumulation cavity, a spring, an indicating rod and an energy accumulator piston; the energy storage cavity is provided with a storage end and a pressure end, and the storage end is connected with a hydraulic system communicating pipe; the indicating rod and the spring are arranged at the pressure end, the indicating rod is connected with the energy accumulator piston and moves along with the energy accumulator piston, and the pressure of the hydraulic system can be detected by detecting the position of the indicating rod; and the spring is sleeved on the indicating rod and is used for pressing the energy accumulator piston so as to compensate the pressure of the hydraulic system. According to the technical scheme, the pressure of the hydraulic system can be detected.

Description

Technical Field

[0001] This application relates to the technical field of vibration isolation installation of aviation equipment, and specifically relates to a hydraulic system accumulator and an accumulator pressure detection method. Background Art

[0002] The aircraft turboprop engine is installed on the engine mounting bracket through a vibration isolation device. When the aircraft is operating, the engine generates torque. When the torque is too large, it may damage the vibration isolation device. In this case, it is necessary to provide counter-torque to offset the torque generated by the engine.

[0003] The traditional anti-torsion method is to use a metal torsion bar to rigidly connect the engine to the engine mount. However, this method will reduce the vibration isolation effect of the vibration isolation device. In order to reduce the impact on the vibration isolation device while anti-torsion, the existing engine anti-torsion methods also include using a hydraulic anti-torsion device installed on the engine mount. The axial direction of the hydraulic device is the rotation direction of the turboprop engine blades. The hydraulic device performs one-way anti-torsion in its axial direction, reducing the impact on the vibration isolation device while anti-torsion. The existing hydraulic device cannot judge the pressure in the hydraulic system, so it is impossible to know whether there is hydraulic oil leakage in the hydraulic system and whether the hydraulic system needs to be replaced, which has potential safety hazards. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, this application provides a hydraulic system accumulator and an accumulator pressure detection method to detect the pressure of the hydraulic system.

[0005] To achieve the above object, this application provides a hydraulic system accumulator, including: An energy storage cavity, a spring, an indicating rod, and an accumulator piston; The energy storage cavity has a storage end and a pressure end, and the storage end is connected to the hydraulic system connecting pipe; The indicating rod and the spring are arranged at the pressure end. The indicating rod is connected to the accumulator piston and moves with the accumulator piston. The pressure of the hydraulic system can be detected by detecting the position of the indicating rod; The spring is sleeved on the indicating rod and presses the accumulator piston to compensate for the pressure of the hydraulic system.

[0006] Optionally, a through hole is provided at the pressure end. The top end of the indicating rod passes through the through hole, and the display length of the indicating rod outside the accumulator changes as the accumulator piston moves.

[0007] Optionally, the indicating rod and the accumulator piston are separately arranged and connected through a connecting structure.

[0008] Optionally, an indicating area is divided on the indicating rod. The indicating area includes a high hydraulic pressure area, a medium hydraulic pressure area, and a low hydraulic pressure area; As the indicating rod moves, the accumulator can indicate different current indicating areas to display the hydraulic system pressure of the current indicating area.

[0009] Optionally, the hydraulic system accumulator is further provided with a displacement detection device to measure the displacement of the indicating rod.

[0010] Optionally, the accumulator piston has an annular groove, and a sealing ring is arranged in the annular groove to seal and fit the inner wall of the accumulator cavity.

[0011] Optionally, a throttle hole is arranged at the connection between the accumulator and the hydraulic system connecting pipe.

[0012] In addition, to achieve the above object, the present application also provides a method for detecting the pressure of a hydraulic system accumulator, which is applied to the hydraulic system accumulator described in any one of the above, and the method includes: Monitoring the indicating area of the indicating rod to monitor the liquid level of the accumulator; Outputting a corresponding hydraulic system pressure prompt according to the liquid level of the accumulator.

[0013] Optionally, the indicating area of the indicating rod includes a high liquid level area of the accumulator, a medium liquid level area of the accumulator, and a low liquid level area of the accumulator; The outputting a corresponding hydraulic system pressure prompt according to the liquid level of the accumulator includes: If it is monitored that the indicating area of the indicating rod is the high hydraulic area of the accumulator, continue to monitor; If it is monitored that the indicating area of the indicating rod is the medium hydraulic area of the accumulator, output a prompt that the pressure needs to be reduced and liquid needs to be replenished; If it is monitored that the indicating area of the indicating rod is the low hydraulic area of the accumulator, output a prompt that the pressure is insufficient and the hydraulic system needs to be replaced.

[0014] A hydraulic system accumulator and a method for detecting the pressure of the accumulator provided by the present application, the accumulator includes: an accumulator cavity, a spring, an indicating rod, and an accumulator piston; the accumulator cavity has a storage end and a pressure end, and the storage end is connected to a hydraulic system connecting pipe; the indicating rod and the spring are arranged at the pressure end, the indicating rod is connected to the accumulator piston and moves with the accumulator piston, and the hydraulic system pressure can be detected by detecting the position of the indicating rod; the spring is sleeved on the indicating rod and presses the accumulator piston to compensate for the hydraulic system pressure.

[0015] Compared with the existing hydraulic anti-torsion device of a turboprop engine, the embodiment of the present application provides a hydraulic system accumulator and a method for detecting the pressure of the accumulator, which can detect the hydraulic system pressure according to the position of the indicating rod of the accumulator, so as to judge whether the hydraulic oil of the hydraulic system leaks. Description of the Drawings

[0016] Figure 1 This is the schematic diagram of the hydraulic anti-torsion device for an embodiment of the accumulator and the accumulator pressure detection method of the present application; Figure 2 This is the structural schematic diagram of the hydraulic anti-torsion device for an embodiment of the accumulator and the accumulator pressure detection method of the present application.

[0017] Reference numerals: Actuator 100, actuator rod 110, connection hole 111, piston seal structure 120, hydraulic chamber 130, oil storage end 131, radial support portion 140, first limit hole 150, second limit hole 160; Accumulator 200, accumulator chamber 210, spring 220, indicating rod 230, accumulator piston 240, accumulator through hole 250, throttle hole 260; Communication pipe 300, shock absorber 400, engine 500. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] The traditional anti-torsion method for an aircraft turboprop engine is to use a metal torsion bar to rigidly connect the engine to the engine mount. However, this method will reduce the vibration isolation effect of the vibration isolation device. In order to reduce the impact on the vibration isolation device while anti-torsion, the existing engine anti-torsion method also uses a hydraulic anti-torsion device installed on the engine mount. The axial direction of the hydraulic device is the rotation direction of the turboprop engine blade, and the hydraulic device performs one-way anti-torsion in its axial direction, reducing the impact on the vibration isolation device while anti-torsion. The existing hydraulic device cannot judge the pressure in the hydraulic system, so it is impossible to know whether there is hydraulic oil leakage in the hydraulic system and whether the hydraulic system needs to be replaced, which has potential safety hazards.

[0021] In view of the above phenomenon, in the first embodiment of an accumulator 200 of a hydraulic system and a method for detecting the pressure of the accumulator 200 in the present application, a hydraulic system accumulator 200 is provided, including: an energy storage chamber 210, a spring 220, an indicating rod 230, and an accumulator piston 240; the energy storage chamber 210 has a storage end and a pressure end, and the storage end is connected to a hydraulic system connecting pipe 300; the indicating rod 230 and the spring 220 are arranged at the pressure end, the indicating rod 230 is connected to the accumulator piston 240 and moves with the accumulator piston 240, and the hydraulic system pressure can be detected by detecting the position of the indicating rod 230; the spring 220 is sleeved on the indicating rod 230 and presses on the accumulator piston 240 to compensate for the hydraulic system pressure.

[0022] It should be noted that, referring to Figure 1 and Figure 2 , the actuator 100 and the accumulator 200 are the main components of the hydraulic torsion-resistant device, and the actuator 100 and the accumulator 200 are connected by a connecting pipe 300. The hydraulic torsion-resistant device has two actuators 100 on the left and right, which are respectively connected to both sides of the engine 500 for torsion. Referring to Figure 1 , when the engine 500 generates an input torque T in , the piston seal ring 120 and the actuator rod 110 of the left actuator 100 move upward by a displacement X C , and at the same time, the piston seal ring 120 and the actuator rod 110 of the right actuator 100 move downward by a displacement X C . The storage end stores the hydraulic oil of the hydraulic system; in the initial stage, the accumulator 200 is filled with hydraulic oil, the liquid level is the highest, and the compression amount of the spring 220 is the largest. If there is a hydraulic oil leakage, when the hydraulic oil leakage is not large, the pressure exerted by the spring 220 on the accumulator piston 240 can compensate for the pressure of the hydraulic system and make the storage end of the energy storage chamber 210 and the entire hydraulic system filled with hydraulic oil, and the hydraulic torsion-resistant device can still play a torsion-resistant role when there is a small amount of oil leakage. The indicating rod 230 is connected to the accumulator piston 240. When the liquid level in the accumulator 200 changes, the accumulator piston 240 drives the indicating rod 230 to move, and the hydraulic system pressure can be detected by detecting the moving distance of the indicating rod 230 or the position of the indicating rod 230. A certain displacement distance length range or the position of the indicating rod 230 is calibrated on the indicating rod 230, and when the displacement distance length range or the position of the indicating rod 230 is reached, a corresponding prompt for the hydraulic position is output in a timely manner. The prompt can be: replenish hydraulic oil, replace the hydraulic torsion-resistant device, etc.

[0023] Exemplarily, the position of the indicating rod 230 can be determined by calibrating an indicating area on the indicating rod 230, and the hydraulic system pressure can be judged by the indicating area pointed to by the fixed point of the accumulator 200. The moving distance of the indicating rod 230 can be detected by a displacement detection device, and the hydraulic system pressure can be judged according to the moving distance.

[0024] In this embodiment, the indicating rod 230 is connected to the accumulator piston 240 and moves with it. The pressure of the hydraulic system can be detected by detecting the moving distance or position of the indicating rod 230. When the pressure of the hydraulic system decreases, hydraulic oil leaks, and when the pressure decreases to a certain range, a corresponding prompt is output in a timely manner.

[0025] Furthermore, a through hole is provided at the pressure end, the top end of the indicating rod 230 passes through the through hole, and the displayed length of the indicating rod 230 outside the accumulator 200 changes as the accumulator piston 240 moves.

[0026] It should be noted that the indicating length of the indicating rod 230 outside the accumulator 200 changes with the position of the accumulator piston 240. When the liquid level drops, the indicating length decreases. In a feasible implementation manner, different positions of the indicating rod 230 can be pointed to according to the fixed position of the through hole.

[0027] In this embodiment, by detecting the change in the displayed length of the indicating rod 230 outside the accumulator through hole 250, the pressure inside the hydraulic system can be obtained. In other feasible implementation manners, the accumulator 200 can adopt a visible window with fixed point markings on the window, and the indicating rod 230 has observable display length scale markings inside the accumulator cavity 210. The pressure inside the hydraulic system can be detected through the scale change of the fixed points.

[0028] Furthermore, the indicating rod 230 and the accumulator piston 240 are separately arranged and connected through a connecting structure.

[0029] It should be noted that the connecting structure is: threaded connection, key connection, etc.

[0030] In this embodiment, the indicating rod 230 is separately arranged and connected to the accumulator piston 240 through a connecting structure, which is convenient for installation and calibration of the indicating area on the corresponding indicating rod 230.

[0031] Furthermore, an indicating area is divided on the indicating rod 230, and the indicating area includes a high hydraulic pressure area, a medium hydraulic pressure area, and a low hydraulic pressure area; as the indicating rod 230 moves, the accumulator 200 can indicate different current indicating areas to display the pressure of the hydraulic system in the current indicating area.

[0032] It should be noted that the high hydraulic pressure area, the medium hydraulic pressure area, and the low hydraulic pressure area can be distinguished by colors. By pointing the fixed points on the accumulator 200 to different indicating areas, the current pressure of the hydraulic system can be displayed. The fixed points can be the above-mentioned accumulator through hole 250, the fixed points of the visible window of the accumulator 200, etc.

[0033] In this embodiment, the liquid level of the accumulator 200 is visualized by setting an indicating rod 230, which can intuitively judge the pressure of the hydraulic system and detect the oil leakage of the hydraulic system in a timely manner.

[0034] In other feasible embodiments, the hydraulic system accumulator 200 is further provided with a displacement detection device to measure the displacement of the indicating rod 230.

[0035] It should be noted that the indicating rod 230 is directly connected to the hydraulic system piston. By directly measuring the displacement of the indicating rod 230 through the displacement detection device, the pressure of the hydraulic system can be detected, and the oil leakage condition of the hydraulic system can be obtained according to the system pressure.

[0036] Furthermore, the accumulator piston 240 has an annular groove, and a sealing ring is provided in the annular groove to seal and fit the inner wall of the accumulator cavity 210.

[0037] It should be noted that an annular groove is provided on the contact surface between the accumulator piston 240 and the inner wall of the accumulator cavity 210. The annular groove is used to install the sealing ring, which can better maintain the sealing performance of the hydraulic system and prevent hydraulic oil leakage.

[0038] Furthermore, a throttle hole 260 is provided at the connection between the accumulator 200 and the connecting pipe 300 of the hydraulic system.

[0039] In this embodiment, the accumulator 200 is connected to the connecting pipe 300 through the throttle hole 260, which slows down the flow rate of the accumulator 200 and prevents the accumulator 200 from being impacted due to excessive pressure changes in the hydraulic system.

[0040] Based on the above embodiments, the present application also provides a method for detecting the pressure of a hydraulic system accumulator, which is applied to the hydraulic system accumulator as described above. The method includes: Step 10, monitoring the indicating area of the indicating rod to monitor the liquid level of the accumulator; Step 20, outputting a corresponding accumulator pressure prompt according to the liquid level of the accumulator.

[0041] It should be noted that multiple indicating areas are divided on the indicating rod of the accumulator, and different indicating areas represent different liquid levels of the accumulator. When the liquid level of the accumulator decreases, the pressure inside the accumulator decreases, and there is a situation of hydraulic oil leakage in the hydraulic system. When a small amount of hydraulic oil leaks, the hydraulic system can still play an anti-torsion role. When the amount of hydraulic oil leakage is too large, the anti-torsion device of the hydraulic system needs to be replaced in a timely manner. In this embodiment, the pressure of the accumulator is monitored by monitoring the liquid level of the accumulator.

[0042] Furthermore, the indicating areas of the indicating rod include a high liquid level area of the accumulator, a medium liquid level area of the accumulator, and a low liquid level area of the accumulator; The above step 20, outputting a corresponding accumulator pressure prompt according to the liquid level of the accumulator includes: Step 201, if it is monitored that the area indicated by the indicating rod is the high hydraulic pressure area of the accumulator, continue to monitor; Step 202, if it is monitored that the area indicated by the indicating rod is the medium hydraulic pressure area of the accumulator, output a prompt that the pressure needs to be reduced and liquid needs to be replenished; Step 203, if it is monitored that the area indicated by the indicating rod is the low hydraulic pressure area of the accumulator, output a prompt that the pressure is insufficient and the hydraulic system needs to be replaced.

[0043] In this embodiment, each indicating area of the indicating rod is calibrated in advance according to experimental measurements. Each indicating area represents different liquid levels of the accumulator and different hydraulic pressure ranges of the hydraulic system. The pressure of the hydraulic system can be detected by detecting the indicating area of the indicating rod. When the pressure of the hydraulic system decreases, the hydraulic oil leaks. When the pressure decreases to the calibrated range, corresponding prompts are output in a timely manner.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including an..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0045] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A hydraulic system accumulator, characterized in that: The accumulator comprises: an accumulator chamber, a spring, an indicator rod and an accumulator piston; The energy storage chamber has a storage end and a pressure end, and the storage end is connected to a hydraulic system connecting pipe; The indicator rod and the spring are arranged at the pressure end, the indicator rod is connected to the accumulator piston and moves with the accumulator piston, and the pressure of the hydraulic system can be detected by detecting the position of the indicator rod; The spring is sleeved on the indicator rod and is pressed against the accumulator piston to compensate for the pressure of the hydraulic system.

2. The hydraulic system accumulator according to claim 1, characterized in that: The pressure end is provided with a through hole, the top end of the indicator rod passes through the through hole, and the display length of the indicator rod outside the accumulator changes as the accumulator piston moves.

3. The hydraulic system accumulator according to claim 2, characterized in that: The indicating rod and the accumulator piston are arranged separately and connected via a connecting structure.

4. The hydraulic system accumulator according to any one of claims 1 to 3, characterized in that: The indicator rod is divided into indicator areas, which include a high hydraulic pressure area, a medium hydraulic pressure area and a low hydraulic pressure area; As the indicating rod moves, the accumulator can indicate different current indicating areas to display the hydraulic system pressure of the current indicating area.

5. The hydraulic system accumulator according to claim 1, characterized in that: The hydraulic system accumulator is also provided with a displacement detection device to measure the displacement of the indicator rod.

6. The hydraulic system accumulator according to claim 1, characterized in that: The accumulator piston has an annular groove, and a sealing ring is arranged in the annular groove to seal against the inner wall of the energy storage chamber.

7. The hydraulic system accumulator according to claim 1, characterized in that: A throttling hole is provided at the connection between the accumulator and the hydraulic system connecting pipe.

8. A method for detecting pressure of a hydraulic system accumulator, applied to the hydraulic system accumulator as claimed in any one of claims 1 to 7, characterized in that: The method comprises: Monitor the indicator rod indication area to monitor the accumulator fluid level; A corresponding hydraulic system pressure prompt is output according to the accumulator fluid level.

9. The method for detecting the accumulator pressure of a hydraulic system according to claim 8, characterized in that: The indicating area of ​​the indicating rod includes a high liquid level area of ​​the accumulator, a middle liquid level area of ​​the accumulator and a low liquid level area of ​​the accumulator; Outputting a corresponding hydraulic system pressure prompt according to the accumulator liquid level includes: If it is detected that the area indicated by the indicator rod is the high hydraulic pressure area of ​​the accumulator, continue monitoring; If it is detected that the area indicated by the indicator rod is the hydraulic area in the accumulator, a prompt indicating that the output pressure is reduced and fluid replenishment is required is given; If it is monitored that the area indicated by the indicator rod is the low hydraulic area of ​​the accumulator, it is indicated that the output pressure is insufficient and the hydraulic system needs to be replaced.

Images