CN-122014716-A - Acceleration testing device for hydraulic mechanism

Abstract

The invention discloses an acceleration testing device for a hydraulic mechanism, which comprises a main crank arm of the hydraulic mechanism, an adaptive installation assembly, a linear acceleration sensing unit and a signal processing unit, wherein the end side of the main crank arm of the hydraulic mechanism is provided with a large hexagon screw, the adaptive installation assembly comprises an installation bracket and a fastening piece, the installation bracket and the fastening piece can be detachably fastened on the large hexagon screw, an opening is formed in one end side of the installation bracket, the fastening piece is arranged on the opening, the linear acceleration sensing unit is detachably arranged on the adaptive installation assembly, and the signal processing unit is connected to the linear acceleration sensing unit. By the aid of the acceleration testing device for the hydraulic mechanism, an operator does not need to stretch into a narrow space in the mechanism to operate, the device can be installed only on the outer side of a main crank arm of the hydraulic mechanism, the problems that the operator rubs and drops parts are avoided, the structure is simple, safety and reliability are achieved, assembly efficiency is improved, and maintenance cost is easy to control.

Inventors

• Chi Fangren
• Fu Chuanyue
• CAO HAIBING
• WANG KAI
• CHEN XUBIN
• HE JIAWEI
• LIAO WEIXING
• MAI YANJIE
• WANG QILONG
• LIU YUBO

Assignees

• 深圳供电局有限公司

Dates

Publication Date

20260512

Application Date

20260115

Claims (8)

1. 1. An acceleration testing device for a hydraulic mechanism, comprising: The hydraulic mechanism main crank arm is provided with a large hexagon screw at the end side; The self-adaptive mounting assembly comprises a mounting bracket and a fastener, wherein the mounting bracket can be detachably fastened on the large hexagon screw, one end side of the mounting bracket is provided with an opening, and the fastener is arranged on the opening; the linear acceleration sensing unit is detachably arranged on the adaptive installation component; The signal processing unit is connected to the linear acceleration sensing unit, wherein the adaptive installation component is sleeved on the large hexagon screw through the opening, and the installation bracket and the large hexagon screw are locked through the fastener; And the linear acceleration sensing unit is used for acquiring an electrical signal of the acceleration change of the main crank arm of the hydraulic mechanism, and the signal processing unit is used for converting the electrical signal into a digital signal after amplifying and low-pass filtering.
2. 2. The acceleration testing apparatus for a hydraulic mechanism according to claim 1, wherein the 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. 3. The acceleration testing apparatus for a hydraulic mechanism according to claim 1, wherein the mounting bracket is made of a metal material and has a hexagonal shape, and an anti-slip pad for increasing friction is provided on an inner side of the mounting bracket.
4. 4. The acceleration testing device for a hydraulic machine according to claim 1, characterized in, that the linear acceleration sensing unit comprises at least a piezoelectric acceleration sensor with a measuring range set to 0-60m/s 2.
5. 5. The acceleration testing apparatus for a hydraulic mechanism according to claim 1, wherein the signal processing unit comprises a signal amplifying module electrically connected to the linear acceleration sensing unit, a filtering module electrically connected to the signal amplifying module, and an A/D converting module, wherein: The signal amplification module amplifies the acceleration signal output by the linear acceleration sensing unit, the filtering module filters high-frequency noise generated by 50Hz power frequency interference and mechanism vibration, and the A/D conversion module converts the processed analog signal into a digital signal.
6. 6. The acceleration testing device for a hydraulic machine according to claim 1, characterized in, that the signal processing unit comprises a data reading interface; The reading unit is an oscilloscope or a data acquisition instrument, the oscilloscope or the data acquisition instrument performs one-time integral operation according to the digital signals converted by the signal processing unit, an action speed curve of the hydraulic mechanism is obtained, a curve peak value and a key node speed value are read, and speed measurement is completed.
7. 7. The acceleration testing device for a hydraulic machine of claim 1, wherein the fastener is a socket head cap screw, and wherein a thickened spacer is sleeved on the socket head cap screw.
8. 8. The acceleration testing device for a hydraulic mechanism according to claim 1, wherein the mounting bracket is provided with an assembly groove for mounting the linear acceleration sensing unit.

Description

Acceleration testing device for hydraulic mechanism Technical Field The invention relates to the technical field of maintenance of power substation equipment, in particular to an acceleration testing device for a hydraulic mechanism. Background In the prior art, the hydraulic mechanism is a core driving unit of the high-voltage switch equipment, and the action speed of the hydraulic mechanism directly determines the opening and closing performance of the switch equipment, so that the action speed of the hydraulic mechanism is strictly detected when the switch equipment is overhauled and maintained every year so as to ensure the stable operation of the power system. The traditional speed measurement scheme for the hydraulic mechanism generally adopts a rotary resistor speed measurement sensor, and the working principle is that rotary motion is converted into a resistor signal through contact cooperation of the sensor and a rotary component in the mechanism, so that the action speed is calculated. However, in actual overhaul operation, the technical defects which are difficult to overcome are exposed by the scheme: 1. The installation suitability is poor, the internal structure of the hydraulic mechanism is compact, the rotary resistor speed measuring sensor needs to be installed near a core transmission part in the mechanism, the space of the area is narrow, the external dimension of the sensor is not matched with an installation station, the accurate alignment installation difficulty is extremely high, and the installation deviation still can occur during multiple debugging. 2. The safety risk is outstanding, and operators need to stretch hands and tools into a narrow space in the mechanism in the installation process, so that the hands and tools are very easy to scratch with moving parts, or parts fall off due to improper disassembly/installation of the parts, and the double risks of personnel injury and equipment damage exist. 3. The maintenance efficiency is low, the installation and the debugging of a single sensor are required to take more than 30 minutes due to the influence of space limitation and installation precision requirements, and the overall maintenance period is obviously prolonged. 4. The detection precision is unstable, namely the rotary resistor speed measuring sensor depends on close contact with a rotary part, oil stains and dust in the mechanism are easy to cause poor contact, further signal fluctuation is caused, the detection precision deviation is caused, and the actual action speed of the mechanism cannot be accurately reflected. Disclosure of Invention The invention aims to solve the technical problems of simple structure, safety, reliability, improvement of assembly efficiency and easy control of maintenance cost, and the acceleration testing device for the hydraulic mechanism is provided, an operator does not need to stretch into a narrow space in the mechanism to operate, and the installation can be completed only on the outer side of a main crank arm of the hydraulic mechanism, so that the problems of scratch and part falling of the operator are avoided. The invention provides an acceleration testing device for a hydraulic mechanism, which comprises a hydraulic mechanism main crank arm, an adaptive installation assembly, a linear acceleration sensing unit and a signal processing unit, wherein the hydraulic mechanism main crank arm is provided with a large hexagon screw at the end side, the adaptive installation assembly comprises an installation support and a fastener which can be detachably fastened on the large hexagon screw, an opening is formed in one end side of the installation support, the fastener is arranged on the opening, the linear acceleration sensing unit is detachably arranged on the adaptive installation assembly, the signal processing unit is connected on the linear acceleration sensing unit, the adaptive installation assembly is sleeved on the large hexagon screw through the opening, the installation support is locked with the large hexagon screw through the fastener, an electric signal of acceleration change of the hydraulic mechanism main crank arm is obtained through the linear acceleration sensing unit, and the electric signal is amplified and low-pass filtered and then converted into a digital signal. The reading unit is detachably connected with the signal processing unit and acquires an action speed value of the hydraulic mechanism according to the digital signal converted by the signal processing unit. The mounting bracket is made of a metal material and is hexagonal, and an anti-slip gasket for increasing friction force is arranged on the inner side of the mounting bracket. The linear acceleration sensing unit at least comprises a piezoelectric acceleration sensor with the measuring range of 0-60m/s 2. The signal processing unit comprises a signal amplifying module electrically connected with the linear acceleration sensing unit, a filtering module e