Acceleration testing device for hydraulic mechanism

Abstract

The invention discloses an acceleration testing device for a hydraulic mechanism, and the device comprises a hydraulic mechanism main crank arm which is provided with a large hexagonal screw at the end side; the adaptive mounting assembly comprises a mounting bracket and a fastener, the mounting bracket can be detachably fastened on the large hexagonal screw, an opening is formed in one end side of the mounting bracket, and the fastener is arranged on the opening; the linear acceleration sensing unit is detachably mounted on the adaptive mounting assembly; and the signal processing unit is connected to the linear acceleration sensing unit. According to the acceleration testing device for the hydraulic mechanism, an operator does not need to stretch into a narrow space in the mechanism for operation, installation can be completed only on the outer side of a main crank arm of the hydraulic mechanism, and the problems of personnel scratching, part falling and the like are avoided; the structure is simple, safe and reliable, assembling efficiency is improved, and maintenance cost is easy to control.

Description

Technical Field

[0001] This invention relates to the field of power substation equipment maintenance technology, and in particular to an acceleration testing device for hydraulic mechanisms. Background Technology

[0002] In the existing technology, the hydraulic mechanism is the core drive unit of high-voltage switchgear. Its operating speed directly determines the opening and closing performance of the switchgear. Therefore, when carrying out the annual maintenance of switchgear, the operating speed of the hydraulic mechanism must be strictly tested to ensure the stable operation of the power system.

[0003] Traditional speed measurement methods for hydraulic mechanisms typically employ rotary resistance speed sensors. These sensors work by converting rotational motion into a resistance signal through contact between the sensor and the rotating components inside the mechanism, thereby calculating the operating speed. However, in actual maintenance work, this method has revealed insurmountable technical flaws: 1. Poor installation compatibility: The internal structure of the hydraulic mechanism is compact, and the rotary resistance speed sensor needs to be installed near the core transmission component inside the mechanism. However, the space in this area is narrow, and the sensor's size does not match the installation position, making precise alignment extremely difficult. Even after multiple adjustments, installation deviations may still occur.

[0004] 2. Significant safety risks: During installation, operators need to put their hands and tools into the narrow space inside the mechanism, which makes them very susceptible to scratches from moving parts, or parts may fall off due to improper disassembly / installation, posing a dual risk of personal injury and equipment damage.

[0005] 3. Low maintenance efficiency: Due to space limitations and installation accuracy requirements, the installation and debugging of a single sensor takes more than 30 minutes, which significantly extends the overall maintenance period.

[0006] 4. Unstable detection accuracy: Rotary resistance speed sensors rely on close contact with rotating parts. Oil and dust inside the mechanism can easily lead to poor contact, which in turn causes signal fluctuations and results in deviations in detection accuracy, making it impossible to accurately reflect the true speed of the mechanism. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an acceleration testing device for a hydraulic mechanism, which allows the operator to work without having to reach into the narrow space inside the mechanism, and can be installed only on the outside of the main crank arm of the hydraulic mechanism, avoiding problems such as personnel scratching and parts falling off; the structure is simple, safe and reliable, improves assembly efficiency, and the maintenance cost is easy to control.

[0008] To address the aforementioned technical problems, this invention provides an acceleration testing device for a hydraulic mechanism, comprising: a main crank arm of the hydraulic mechanism, with a large hexagonal screw on one end of the main crank arm; an adapter mounting assembly, comprising: a mounting bracket and fasteners detachably fastened to the large hexagonal screw, one end of the mounting bracket having an opening, and the fasteners mounted on the opening; a linear acceleration sensing unit detachably mounted on the adapter mounting assembly; and a signal processing unit connected to the linear acceleration sensing unit, wherein: the adapter mounting assembly is fitted onto the large hexagonal screw through the opening, and the mounting bracket is locked to the large hexagonal screw by the fasteners; the linear acceleration sensing unit acquires an electrical signal of the acceleration change of the main crank arm of the hydraulic mechanism, and the signal processing unit amplifies and low-pass filters the electrical signal to convert it into a digital signal.

[0009] The reading unit is detachably connected to the signal processing unit. The reading unit obtains the action speed value of the hydraulic mechanism based on the digital signal converted by the signal processing unit.

[0010] The mounting bracket is made of metal and is hexagonal; the inner side of the mounting bracket is equipped with anti-slip pads to increase friction.

[0011] The linear acceleration sensing unit includes at least a piezoelectric acceleration sensor with a range of 0-60 m / s².

[0012] The signal processing unit includes: a signal amplification module electrically connected to the linear acceleration sensing unit, a filtering module electrically connected to the signal amplification module, and an A / D conversion module. The signal amplification module amplifies the acceleration signal output by the linear acceleration sensing unit, the filtering module filters out 50Hz power frequency interference and high-frequency noise generated by mechanism vibration, and the A / D conversion module converts the processed analog signal into a digital signal.

[0013] The signal processing unit includes a data reading interface; the reading unit is an oscilloscope or a data acquisition instrument. The oscilloscope or data acquisition instrument performs an integration operation on the digital signal converted by the signal processing unit to obtain the action speed curve of the hydraulic mechanism, reads the peak value and key node speed value of the curve, and completes the speed measurement.

[0014] The fastener is a hex socket head cap screw, and a thickened pad is fitted onto the hex socket head cap screw.

[0015] The mounting bracket is equipped with an assembly slot for mounting the linear acceleration sensing unit.

[0016] The acceleration testing device for hydraulic mechanisms according to the present invention has the following beneficial effects: The acceleration testing device for hydraulic mechanisms includes: a main crank arm of the hydraulic mechanism, with a large hexagonal screw on the end side of the main crank arm; an adapter mounting assembly, which includes: a mounting bracket and fasteners that can be detachably fastened to the large hexagonal screw, with an opening on one end side of the mounting bracket and the fasteners installed in the opening; a linear acceleration sensing unit detachably mounted on the adapter mounting assembly; and a signal processing unit connected to the linear acceleration sensing unit, wherein: the adapter mounting assembly is fitted onto the large hexagonal screw through the opening, and the mounting bracket is locked to the large hexagonal screw by the fasteners; the linear acceleration sensing unit acquires the electrical signal of the acceleration change of the main crank arm of the hydraulic mechanism, and the signal processing unit converts the electrical signal into a digital signal after amplification and low-pass filtering; the operator does not need to reach into the narrow space inside the mechanism to work, and can complete the installation only on the outside of the main crank arm of the hydraulic mechanism, avoiding problems such as personnel scratches and parts falling off; the structure is simple, safe and reliable, improves assembly efficiency, and maintenance costs are easy to control. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the assembly position of the acceleration testing device for a hydraulic mechanism according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the acceleration testing device for a hydraulic mechanism according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the adapter mounting assembly for the acceleration testing device of the hydraulic mechanism according to an embodiment of the present invention.

[0021] Figure 4 This is a structural block diagram of the signal processing unit of the acceleration testing device for a hydraulic mechanism according to an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-4 The figure shows an embodiment of the acceleration testing device for hydraulic mechanisms according to the present invention.

[0024] The acceleration testing device for a hydraulic mechanism in this embodiment of the invention includes: a main crank arm 1 of the hydraulic mechanism, the end of which has a large hexagonal screw 11; and an adapter mounting assembly 2, which includes: a mounting bracket 21 and a fastener 22 that can be detachably fastened to the large hexagonal screw 11, one end of which has an opening 211, and the fastener 22 is mounted on the opening 211. A detachable linear acceleration sensing unit 3 is mounted on the adapter mounting assembly 2; a signal processing unit 4 is connected to the linear acceleration sensing unit 3, wherein: the adapter mounting assembly 2 is sleeved on the large hexagonal screw 11 through the opening 211, and the mounting bracket 21 is locked to the large hexagonal screw 11 by fastener 22; the linear acceleration sensing unit 3 obtains the electrical signal of the acceleration change of the main crank arm 1 of the hydraulic mechanism, and the signal processing unit 4 converts the electrical signal into a digital signal after amplification and low-pass filtering.

[0025] In specific implementation, the adapter mounting component 2 includes a mounting bracket 21 and a fastener 22. One end of the mounting bracket 21 has an opening 211, and the fastener 22 is detachably mounted on the opening 211. The mounting bracket 21 can be detachably fastened to the large hexagonal screw 11. In this embodiment, the mounting bracket 21 is made of metal material and is a soft metal frame with an overall hexagonal shape.

[0026] The mounting bracket 21 has an assembly slot for mounting the linear acceleration sensor unit 3. The linear acceleration sensor unit 3 can be locked into the mounting slot using hex socket head cap screws. In practice, the linear acceleration sensor unit 3 is placed into the mounting slot of the mounting unit 21 and fixed by tightening the bolts, thus completing the overall assembly of the adapter mounting assembly 2.

[0027] In this embodiment, the spacing between the openings 211 is set to 25mm to match the spacing between the large hexagonal screws 11, so that the adapter mounting component 2 can be fitted onto the large hexagonal screws 11 through the openings 211, and then the mounting bracket 21 and the large hexagonal screws 11 are locked together by the fasteners 22.

[0028] Preferably, an anti-slip pad 212 is installed on the inner side of the mounting bracket 21 to increase friction. The function of the anti-slip pad 212 is to increase friction by placing the anti-slip pad 212 on the contact surface between the metal mounting bracket 21 and the main crank arm 1 of the hydraulic mechanism, thereby preventing displacement of the device during the operation of the mechanism.

[0029] Furthermore, the fastener 22 is a hex socket head cap screw, and a thickened pad 23 is fitted onto the hex socket head cap screw.

[0030] Furthermore, the function of the linear acceleration sensing unit 3 is to collect the linear acceleration signal of the main crank arm 1 of the hydraulic mechanism during its operation. It uses a piezoelectric acceleration sensor with a range of 0-60 m / s² and an accuracy controlled within ±0.05%, ensuring that it can capture subtle acceleration changes in the mechanism's movement.

[0031] During implementation, since the linear acceleration sensing unit 3 uses a high-precision piezoelectric sensor, and with the amplification, filtering and digital processing of the signal processing unit 4, the interference of oil and dust on the signal is effectively eliminated, which can further improve the detection accuracy and meet the requirements of hydraulic structure maintenance accuracy.

[0032] Furthermore, the signal processing unit 4 includes: a signal amplification module 41 electrically connected to the linear acceleration sensing unit 3, a filtering module 42 electrically connected to the signal amplification module 41, and an A / D conversion module 43, wherein: the signal amplification module 41 amplifies the acceleration signal output by the linear acceleration sensing unit 3, the filtering module 42 filters out 50Hz power frequency interference and high-frequency noise generated by mechanism vibration, and the A / D conversion module 43 converts the processed analog signal into a digital signal to ensure the accuracy of signal transmission.

[0033] Preferably, it further includes: a reading unit 5 detachably connected to the signal processing unit 4, the reading unit 5 obtaining the action speed value of the hydraulic mechanism based on the digital signal converted by the signal processing unit 4.

[0034] The signal processing unit 4 includes a data reading interface 44; the reading unit 5 is an oscilloscope or a data acquisition instrument. The oscilloscope or data acquisition instrument performs an integration operation on the digital signal converted by the signal processing unit 4 to obtain the action speed curve of the hydraulic mechanism, reads the peak value and key node speed value of the curve, and completes the speed measurement.

[0035] In the specific implementation of the acceleration testing device for the hydraulic mechanism in this embodiment of the invention, the operator aligns the opening 211 of the mounting bracket 21 with the large hexagonal screw 11 on the end side of the main crank arm 1 of the hydraulic mechanism, attaches the anti-slip pad 212 to the surface of the large hexagonal screw 11, and then screws in the fastener 22 until the mounting bracket 21 and the main crank arm 1 of the hydraulic mechanism are tightly fitted together, thus completing the device fixation.

[0036] The signal processing unit 4 connects to the reading unit 5, i.e., the external equipment instrument, through the data reading interface 44 of the signal processing unit 4 to perform speed measurement: start the hydraulic mechanism to complete one opening and closing action; the linear acceleration sensing unit 3 collects the acceleration signal during the movement of the main crank arm 1 of the hydraulic mechanism, and the signal is amplified, filtered, and converted into a digital signal by the signal processing unit 4.

[0037] Data processing: The reading unit 5 performs an integral operation on the received acceleration digital signal to generate the action speed curve of the hydraulic mechanism, reads the peak value and key node speed value of the curve, and completes the speed measurement. Disassembly of the acceleration testing device for the hydraulic mechanism: After the speed measurement is completed, disconnect the data connection, unscrew the fastener 22, remove the adapter mounting component 2, and restore the hydraulic mechanism to its original state. In this embodiment, the installation of the adapter mounting component 2 takes about 4 minutes, the detection accuracy reaches ±0.02m / s, and the operator works outside the mechanism throughout the process, with no safety risks, thus solving the technical defects of the existing solution.

[0038] It is understandable that during the above assembly and implementation process, the adapter installation component 2 directly utilizes the installation space of the large hexagonal screw 11 on the end side of the main crank arm 1 of the hydraulic mechanism. The operator does not need to reach into the narrow space inside the mechanism to work. The installation can be completed only on the outside of the main crank arm 1 of the hydraulic mechanism, thus completely avoiding safety risks such as personnel scratching and parts falling off.

[0039] At the same time, the installation efficiency is greatly improved: the structural dimensions of the adapter mounting component 2 are perfectly matched with the large hexagonal screws 11 on the end side of the main crank arm 1 of the hydraulic mechanism. The installation process does not require complicated debugging, and a single person can complete the fixing within 5 minutes, which is more than 80% faster than the existing solution. In addition, the acceleration testing device for the hydraulic mechanism in this embodiment of the invention also has the advantage of low maintenance cost. The linear acceleration sensing unit 3 and the adapter mounting unit 2 are detachably connected. When the sensing unit fails, only the sensing unit needs to be replaced, without the need for a complete replacement, thus reducing the later maintenance cost. The acceleration testing device for hydraulic mechanisms according to the present invention has the following beneficial effects: The acceleration testing device for hydraulic mechanisms includes: a main crank arm of the hydraulic mechanism, with a large hexagonal screw on the end side of the main crank arm; an adapter mounting assembly, which includes: a mounting bracket and fasteners that can be detachably fastened to the large hexagonal screw, with an opening on one end side of the mounting bracket and the fasteners installed in the opening; a linear acceleration sensing unit detachably mounted on the adapter mounting assembly; and a signal processing unit connected to the linear acceleration sensing unit, wherein: the adapter mounting assembly is fitted onto the large hexagonal screw through the opening, and the mounting bracket is locked to the large hexagonal screw by the fasteners; the linear acceleration sensing unit acquires the electrical signal of the acceleration change of the main crank arm of the hydraulic mechanism, and the signal processing unit converts the electrical signal into a digital signal after amplification and low-pass filtering; the operator does not need to reach into the narrow space inside the mechanism to work, and can complete the installation only on the outside of the main crank arm of the hydraulic mechanism, avoiding problems such as personnel scratches and parts falling off; the structure is simple, safe and reliable, improves assembly efficiency, and maintenance costs are easy to control.

Claims

1. An acceleration testing device for a hydraulic mechanism, characterized in that, include: The hydraulic mechanism main crank arm has a large hexagonal screw on its end side; The adapter mounting assembly includes: a mounting bracket and a fastener that can be detachably fastened to the large hexagonal screw, wherein one end of the mounting bracket has an opening and the fastener is installed in the opening; A detachable linear acceleration sensing unit mounted on the adapter mounting assembly; A signal processing unit connected to the linear acceleration sensing unit, wherein: the adapter mounting assembly is sleeved onto the large hexagonal screw through the opening, and the mounting bracket is locked to the large hexagonal screw by the fastener; The linear acceleration sensing unit acquires the electrical signal of the acceleration change of the main crank arm of the hydraulic mechanism, and the signal processing unit converts the electrical signal into a digital signal after amplification and low-pass filtering.

2. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, A reading unit is detachably connected to the signal processing unit, and the reading unit obtains the action speed value of the hydraulic mechanism based on the digital signal converted by the signal processing unit.

3. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The mounting bracket is made of metal and is hexagonal; the inner side of the mounting bracket is equipped with an anti-slip pad to increase friction.

4. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The linear acceleration sensing unit includes at least a piezoelectric acceleration sensor with a range of 0-60 m / s².

5. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The signal processing unit includes: a signal amplification module electrically connected to the linear acceleration sensing unit, a filtering module electrically connected to the signal amplification module, and an A / D conversion module, wherein: The signal amplification module amplifies the acceleration signal output by the linear acceleration sensing unit, the filtering module filters out 50Hz power frequency interference and high-frequency noise generated by mechanism vibration, and the A / D conversion module converts the processed analog signal into a digital signal.

6. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The signal processing unit includes a data reading interface; The reading unit is an oscilloscope or a data acquisition instrument. The oscilloscope or data acquisition instrument performs an integration operation on the digital signal converted by the signal processing unit to obtain the action speed curve of the hydraulic mechanism, reads the peak value and key node speed value of the curve, and completes the speed measurement.

7. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The fastener is a hex socket head cap screw, and a thickened pad is fitted onto the hex socket head cap screw.

8. The acceleration testing device for a hydraulic mechanism as described in claim 1, characterized in that, The mounting bracket is provided with an assembly slot for mounting the linear acceleration sensing unit.

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