Hydraulic damper stroke applicability evaluation method and device, storage medium and electronic equipment

Abstract

The invention relates to a hydraulic damper stroke applicability evaluation method and device, a storage medium and electronic equipment. The hydraulic damper stroke applicability evaluation method comprises the steps that equipment information of a to-be-evaluated hydraulic damper is determined; obtaining the structure size information of the to-be-evaluated hydraulic damper based on the equipment information; acquiring a stroke measurement value of the to-be-evaluated hydraulic damper and an oil level measurement value of an outer oil cylinder; calculating according to the structure size information, the stroke measurement value and the oil level measurement value of the outer oil cylinder to obtain the oil leakage rate; determining the operation condition of the to-be-evaluated hydraulic damper; calculating the position variation of an outer oil cylinder piston according to the operation condition; calculating according to the position variable quantity of the piston of the outer oil cylinder and the oil level measurement value of the outer oil cylinder to obtain an oil level calculation value of the outer oil cylinder; and evaluating the stroke applicability of the hydraulic damper to be evaluated according to the oil level calculation value of the outer oil cylinder. Visual measurement of the oil level state of the in-service hydraulic damper can be achieved, the oil leakage condition can be accurately judged, and comprehensive management of the oil leakage problem of the hydraulic damper is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy and power of nuclear power plants, and more specifically, to a method, a device, a storage medium and an electronic device for evaluating the stroke suitability of a hydraulic damper. Background Art

[0002] Pipeline hydraulic dampers have been widely used in the fields of electricity and chemical industry, especially in the field of nuclear power generation, where the number of hydraulic dampers used in a single unit is about 500. As an important part of the pipeline system, the main function of the hydraulic damper is to limit the large-scale transient displacement of the pipeline. This function is similar to the seat belt equipped on a car. During the normal operation of the pipeline, the hydraulic damper is freely stretched and compressed with the thermal displacement of the pipeline, and no additional load is generated on the pipeline. However, when the pipeline system encounters transient conditions such as earthquakes, water hammers, and safety valve tripping, the hydraulic damper will be locked in time to become a rigid structure to limit the vibration displacement of the pipeline, prevent pipeline rupture, medium leakage, and damage to surrounding equipment. It plays a vital role in the safety and stability of the pipeline system when encountering special transient conditions. However, on-site inspections found that oil leakage in hydraulic dampers in actual service is relatively common.

[0003] In order to ensure the performance of the hydraulic damper, the damper is generally not allowed to work within the stroke range of 10mm from the extreme positions at both ends. That is, if the total stroke of the damper is 80mm, the effective stroke of the damper is in the range of 10mm to 70mm. Therefore, after the damper is filled with oil, it needs to be pressed into the effective stroke range for use.

[0004] According to the structural design and working principle of the hydraulic damper, full oil in the damper cylinder is a necessary condition to ensure its performance. If the damper leaks oil, it means that when the damper is stretched to a certain extent, the hydraulic oil in the outer cylinder will be completely sucked into the inner cylinder. At this time, if the damper is further stretched, a cavity will appear in the inner cylinder, resulting in a decrease in the performance of the hydraulic damper or failure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method, device, storage medium and electronic equipment for evaluating the stroke suitability of a hydraulic damper in view of the problems existing in the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is: constructing a hydraulic damper stroke applicability evaluation method, comprising the following steps:

[0007] Determine the equipment information of the hydraulic damper to be evaluated;

[0008] Based on the equipment information of the hydraulic damper to be evaluated, obtaining the structural dimension information of the hydraulic damper to be evaluated;

[0009] Detecting the stroke and the oil level of the outer cylinder of the hydraulic damper to be evaluated, and calculating in combination with the structural dimension information to obtain a stroke measurement value and an outer cylinder oil level measurement value of the hydraulic damper to be evaluated;

[0010] Calculating according to the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder to obtain the oil leakage rate of the hydraulic damper to be evaluated;

[0011] Determining the operating condition of the hydraulic damper to be evaluated;

[0012] According to the operating condition of the hydraulic damper to be evaluated, calculating the change in position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the switching of the operating condition;

[0013] Calculating according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain a calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under a set working condition;

[0014] The stroke suitability of the hydraulic damper to be evaluated is evaluated according to the calculated value of the oil level of the outer cylinder.

[0015] In the stroke suitability evaluation method of the hydraulic damper of the present invention, the stroke measurement value of the hydraulic damper to be evaluated includes: a first stroke measurement value and a second stroke measurement value; the external cylinder oil level measurement value of the hydraulic damper to be evaluated includes: a first external cylinder oil level measurement value and a second external cylinder oil level measurement value;

[0016] The detecting of the stroke and the oil level of the outer cylinder of the hydraulic damper to be evaluated and the calculation combined with the structural dimension information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated includes:

[0017] Measuring the stroke and the external cylinder of the hydraulic damper to be evaluated and calculating them in combination with the structural dimension information to obtain a first stroke measurement value and a first external cylinder oil level measurement value;

[0018] The stroke and the external cylinder of the hydraulic damper to be evaluated are measured for a second time and calculated in combination with the structural dimension information to obtain a second stroke measurement value and a second external cylinder oil level measurement value.

[0019] In the hydraulic damper stroke suitability evaluation method of the present invention, the structural dimension information of the hydraulic damper to be evaluated includes: the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, and the outer diameter of the outer cylinder of the hydraulic damper to be evaluated;

[0020] The measuring the stroke and the external cylinder of the hydraulic damper to be evaluated and calculating in combination with the structural dimension information to obtain the first stroke measurement value and the first external cylinder oil level measurement value comprises:

[0021] Measuring the current stroke of the hydraulic damper to be evaluated to obtain a first stroke measurement value of the hydraulic damper to be evaluated;

[0022] Calculate according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the first stroke measurement value to obtain a first theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate;

[0023] Performing detection and positioning according to the first theoretical value to obtain a first measured distance of the hydraulic damper to be evaluated;

[0024] The first outer cylinder oil level measurement value is obtained by performing calculation according to the first measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated.

[0025] In the method for evaluating the stroke suitability of a hydraulic damper of the present invention, the second measurement of the stroke and the external cylinder of the hydraulic damper to be evaluated and the calculation combined with the structural dimension information to obtain the second stroke measurement value and the second external cylinder oil level measurement value comprises:

[0026] After a preset measurement time interval, measuring the current stroke of the hydraulic damper to be evaluated to obtain a second stroke measurement value of the hydraulic damper to be evaluated;

[0027] Calculate according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the second stroke measurement value to obtain a second theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate;

[0028] Performing detection and positioning according to the second theoretical value to obtain a second measured distance of the hydraulic damper to be evaluated;

[0029] The second outer cylinder oil level measurement value is obtained by performing calculation according to the second measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated.

[0030] In the method for evaluating the stroke suitability of a hydraulic damper of the present invention, the step of calculating based on the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder to obtain the oil leakage rate of the hydraulic damper to be evaluated comprises:

[0031] The oil leakage rate of the hydraulic damper to be evaluated is obtained by calculation based on the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, the first stroke measurement value, the second stroke measurement value, the first outer cylinder oil level measurement value, the second outer cylinder oil level measurement value and the preset measurement time interval.

[0032] In the method for evaluating the stroke suitability of a hydraulic damper of the present invention, the step of calculating the change in the position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the switching of the operating conditions according to the operating conditions of the hydraulic damper to be evaluated comprises:

[0033] Based on the operating conditions, calculating a change in the axial length of the hydraulic damper to be evaluated between two adjacent operating conditions;

[0034] The change in the position of the outer cylinder piston is obtained by calculation based on the change in the axial length of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, and the outer diameter of the outer cylinder of the hydraulic damper to be evaluated.

[0035] In the stroke suitability evaluation method for a hydraulic damper of the present invention, the external cylinder oil level calculation value comprises: a first calculation value of the external cylinder oil level of the hydraulic damper to be evaluated when switching to the set working condition, and a second calculation value of the external cylinder oil level of the hydraulic damper to be evaluated when the set working condition ends;

[0036] The step of calculating according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain the calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under the set working condition comprises:

[0037] The first calculated value of the outer cylinder oil level and the second calculated value of the outer cylinder oil level are calculated based on the change in the outer cylinder piston position, the second outer cylinder oil level measurement value, the oil leakage rate and the working condition duration, to obtain the first calculated value of the outer cylinder oil level and the second calculated value of the outer cylinder oil level.

[0038] The present invention also provides a hydraulic damper stroke suitability evaluation device, comprising:

[0039] A device information determination unit, used to determine device information of the hydraulic damper to be evaluated;

[0040] A structural dimension information acquisition unit, configured to acquire structural dimension information of the hydraulic damper to be evaluated based on device information of the hydraulic damper to be evaluated;

[0041] A detection and calculation unit, used to detect the stroke of the hydraulic damper to be evaluated and the oil level of the outer cylinder, and calculate in combination with the structural size information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated;

[0042] A rate calculation unit, used to calculate according to the structural size information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder, to obtain the oil leakage rate of the hydraulic damper to be evaluated;

[0043] A working condition determination unit, used to determine the operating condition of the hydraulic damper to be evaluated;

[0044] A position change calculation unit, used to calculate the position change of the outer cylinder piston of the hydraulic damper to be evaluated caused by the operating condition switching according to the operating condition of the hydraulic damper to be evaluated;

[0045] An oil level calculation unit, used to calculate according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level, to obtain a calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under a set working condition;

[0046] The stroke suitability evaluation unit is used to evaluate the stroke suitability of the hydraulic damper to be evaluated according to the calculated value of the oil level of the external cylinder.

[0047] The present invention also provides a storage medium storing a computer program, wherein the computer program is suitable for being loaded by a processor to execute the steps of the hydraulic damper stroke suitability evaluation method as described above.

[0048] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the hydraulic damper stroke suitability evaluation method as described above by calling the computer program stored in the memory.

[0049] The method, device, storage medium and electronic device for evaluating the stroke suitability of a hydraulic damper implemented in the present invention have the following beneficial effects: including: determining the equipment information of the hydraulic damper to be evaluated; obtaining the structural dimension information of the hydraulic damper to be evaluated based on the equipment information; obtaining the stroke measurement value and the external cylinder oil level measurement value of the hydraulic damper to be evaluated; calculating and obtaining the oil leakage rate according to the structural dimension information, the stroke measurement value and the external cylinder oil level measurement value; determining the operating condition of the hydraulic damper to be evaluated; calculating the change in the position of the external cylinder piston according to the operating condition; calculating and obtaining the external cylinder oil level calculation value according to the change in the position of the external cylinder piston and the external cylinder oil level measurement value; evaluating the stroke suitability of the hydraulic damper to be evaluated according to the external cylinder oil level calculation value. The present invention can realize the visual measurement of the oil level status of the in-service hydraulic damper, can accurately determine the oil leakage situation, and realize the all-round management of the oil leakage problem of the hydraulic damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0051] Figure 1 It is a flow chart of a method for evaluating the stroke suitability of a hydraulic damper provided by the present invention;

[0052] Figure 2 It is a structural schematic diagram of a hydraulic damper stroke suitability evaluation device provided by the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] After a hydraulic damper leaks oil, its effective stroke becomes shorter. The damper that was originally usable will become unusable under certain working conditions. However, since the oil level status of the damper cannot be directly observed from the appearance, the present invention designs a method for evaluating the stroke suitability of a hydraulic damper. This method can analyze the stroke adaptability of a leaking hydraulic damper, clarify the effectiveness of the hydraulic damper and guide its operation and maintenance management.

[0055] The oil level of the outer cylinder of the hydraulic damper will change due to oil leakage of the damper. In addition, the oil level of the outer cylinder of the hydraulic damper is also related to the operating conditions of the damper. When the operating conditions of the pipeline where the damper is located change, the pipeline will produce relative displacement, causing the hydraulic damper to stretch or compress, and the volume of the oil storage cavity in the damper cylinder changes, causing the oil level state of the outer cylinder to change. Therefore, this method will consider the installation posture, oil leakage rate and operating conditions of the hydraulic damper for design.

[0056] Specifically, refer to Figure 1 , Figure 1 A preferred embodiment of a method for evaluating the stroke suitability of a hydraulic damper provided by the present invention.

[0057] like Figure 1 As shown, the hydraulic damper stroke suitability evaluation method comprises the following steps:

[0058] Step S101: Determine the equipment information of the hydraulic damper to be evaluated.

[0059] Specifically, in the embodiment of the present invention, the device information of the hydraulic damper to be evaluated can be obtained by reading the design file, wherein the device information of the hydraulic damper to be evaluated includes but is not limited to: manufacturer, damper model, factory number and user number.

[0060] Step S102: Based on the equipment information of the hydraulic damper to be evaluated, the structural dimension information of the hydraulic damper to be evaluated is obtained.

[0061] Specifically, in the embodiment of the present invention, the manufacturer's design document or equipment maintenance manual of the hydraulic damper to be evaluated can be determined through the determined equipment information, and then the structural dimension information of the hydraulic damper to be evaluated can be obtained through the manufacturer's design document or equipment maintenance manual. The structural dimension information of the hydraulic damper to be evaluated may include but is not limited to: the inner piston rod diameter (d h ), inner cylinder diameter (d y ), the gap between the return piston and the outer wall of the outer cylinder (t3), the thickness of the return piston (t4), the thickness of the outer cylinder wall (t1), the thickness of the outer cylinder (t2), the thickness of the rear cylinder cover (T h ), the inner diameter of the outer cylinder (D n ), outer diameter of the outer cylinder (D y )wait.

[0062] Step S103: detecting the stroke of the hydraulic damper to be evaluated and the oil level of the outer cylinder, and calculating in combination with the structural dimension information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated.

[0063] In the embodiment of the present invention, the stroke measurement value of the hydraulic damper to be evaluated includes: a first stroke measurement value and a second stroke measurement value; the external cylinder oil level measurement value of the hydraulic damper to be evaluated includes: a first external cylinder oil level measurement value and a second external cylinder oil level measurement value.

[0064] Among them, the stroke and external cylinder oil level of the hydraulic damper to be evaluated are detected, and combined with the structural dimension information to calculate, to obtain the stroke measurement value and the external cylinder oil level measurement value of the hydraulic damper to be evaluated, including: measuring the stroke and the external cylinder of the hydraulic damper to be evaluated once and calculating in combination with the structural dimension information to obtain the first stroke measurement value and the first external cylinder oil level measurement value; measuring the stroke and the external cylinder of the hydraulic damper to be evaluated twice and calculating in combination with the structural dimension information to obtain the second stroke measurement value and the second external cylinder oil level measurement value.

[0065] In an embodiment of the present invention, the stroke and the outer cylinder of the hydraulic damper to be evaluated are measured once and calculated in combination with the structural dimension information to obtain a first stroke measurement value and a first outer cylinder oil level measurement value, including: measuring the current stroke of the hydraulic damper to be evaluated to obtain the first stroke measurement value of the hydraulic damper to be evaluated; calculating according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the diameter of the inner piston rod of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the first stroke measurement value to obtain a first theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate; detecting and positioning according to the first theoretical value to obtain a first measured distance of the hydraulic damper to be evaluated; calculating according to the first measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated to obtain the first outer cylinder oil level measurement value.

[0066] Specifically, a vernier caliper can be used to measure the first stroke measurement value (L x1 ), then, the first theoretical value (L) of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate is calculated according to formula (1).

[0067]

[0068] (1) In the formula, Lmax is the total stroke of the hydraulic damper to be evaluated.

[0069] In the embodiment of the present invention, for the first measured distance of the hydraulic damper to be evaluated, a preset detection method (method for detecting the oil level of a hydraulic damper and method for evaluating its remaining life, 202111621325.8) can be used to detect and locate the front edge of the piston of the outer cylinder of the hydraulic damper to be evaluated near L, and a vernier caliper can be used to measure and record the first measured distance L. 测1 .

[0070] Next, the distance from the front edge of the outer cylinder piston of the hydraulic damper to the inner surface of the rear cover plate (the limit position that the outer cylinder piston can reach) (also called the outer cylinder oil level) is calculated by formula (2), that is, the first outer cylinder oil level measurement value r 测1 .

[0071] r 测1 =L 测1 ―T h (2);

[0072] In an embodiment of the present invention, the stroke and the outer cylinder of the hydraulic damper to be evaluated are measured twice and calculated in combination with the structural dimension information to obtain the second stroke measurement value and the second outer cylinder oil level measurement value, including: after a preset measurement time interval, the current stroke of the hydraulic damper to be evaluated is measured to obtain the second stroke measurement value of the hydraulic damper to be evaluated; according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the diameter of the inner piston rod of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the second stroke measurement value, a second theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate is calculated; according to the second theoretical value, detection and positioning are performed to obtain the second measured distance of the hydraulic damper to be evaluated; according to the second measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, a second outer cylinder oil level measurement value is obtained.

[0073] Specifically, after a preset measurement time interval (T), the same method is used to detect the stroke of the hydraulic damper to be evaluated and the oil level of the external cylinder to obtain the second stroke measurement value L x2 and the second external cylinder oil level measurement value r 测2 Among them, the preset irrational time interval T is greater than or equal to 10 days.

[0074] Step S104: Calculate according to the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder to obtain the oil leakage rate of the hydraulic damper to be evaluated.

[0075] In an embodiment of the present invention, the oil leakage rate of the hydraulic damper to be evaluated is obtained by calculation based on the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the external cylinder oil level measurement value, including: calculating based on the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the external cylinder of the hydraulic damper to be evaluated, the outer diameter of the external cylinder of the hydraulic damper to be evaluated, the first stroke measurement value, the second stroke measurement value, the first external cylinder oil level measurement value, the second external cylinder oil level measurement value and a preset measurement time interval to obtain the oil leakage rate of the hydraulic damper to be evaluated.

[0076] Specifically, the oil leakage rate of the hydraulic damper to be evaluated is calculated by formula (3), where v r Represents the oil leakage rate of the hydraulic damper to be evaluated.

[0077]

[0078] The oil leakage rate represents the average movement rate of the outer cylinder piston of the hydraulic damper to be evaluated simply due to oil leakage, and the unit is: mm / day.

[0079] Step S105: Determine the operating condition of the hydraulic damper to be evaluated.

[0080] Specifically, according to the unit operation plan and system commissioning status, it is determined that from the second stroke measurement and external cylinder oil level detection time, the hydraulic damper to be evaluated operates according to the operating condition sequence shown in Table 1, and the duration of each operating condition is T (j) (Unit: day).

[0081] Table 1 Operating condition sequence of the damper to be evaluated

[0082]

[0083]

[0084] Step S106: Calculate the change in position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the switching of the operating conditions according to the operating conditions of the hydraulic damper to be evaluated.

[0085] In an embodiment of the present invention, according to the operating condition of the hydraulic damper to be evaluated, calculating the change in the position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the operating condition switching includes: calculating the change in the axial length of the hydraulic damper to be evaluated between two adjacent operating conditions based on the operating condition; calculating according to the change in the axial length of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, and the outer diameter of the outer cylinder of the hydraulic damper to be evaluated to obtain the change in the position of the outer cylinder piston.

[0086] Specifically, according to the design documents and installation completion documents of the hydraulic damper to be evaluated, the rotation center of the universal joint at the root end of the hydraulic damper to be evaluated is taken as the origin, and the coordinate axis consistent with the coordinate system of the pipeline system design drawing where the hydraulic damper to be evaluated is used to establish a local coordinate system o-xyz. The change ΔL of the axial length (stroke) of the damper to be evaluated during the process of switching from working condition j to working condition j+1 is calculated according to formula (4): x(j) .

[0087]

[0088] (4) In the formula, ΔL x(j)is the change in the stroke of the hydraulic damper to be evaluated when the working condition j is switched to the working condition j+1, (x j ,y j 、z j ) is the coordinate value of the rotation center of the universal joint at the end of the hydraulic damping pipe to be evaluated in the local coordinate system o-xyz under working condition j, (x j+1 ,y j+1 、z j+1 ) is the coordinate of the rotation center of the universal joint at the end of the hydraulic damper to be evaluated in the local coordinate system o-xyz when the working condition j+1. The coordinate values ​​under each working condition can be obtained by querying the design file of the hydraulic damper to be evaluated.

[0089] Formula (5) is used to calculate the change in the oil level of the external cylinder during the process of switching from working condition j to working condition j+1, that is, the change in the position of the external cylinder piston of the hydraulic damper to be evaluated caused by the working condition switching r s(j) .

[0090]

[0091] Step S107: Calculate according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain the calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under the set working condition.

[0092] In the embodiment of the present invention, the calculated value of the external cylinder oil level includes: a first calculated value of the external cylinder oil level of the hydraulic damper to be evaluated when switching to the set working condition, and a second calculated value of the external cylinder oil level of the hydraulic damper to be evaluated at the end of the set working condition.

[0093] Among them, the calculation is performed according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain the calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under the set working condition, including: calculating according to the change in the position of the outer cylinder piston, the second measured value of the outer cylinder oil level, the oil leakage rate and the duration of the working condition to obtain the first calculated value of the outer cylinder oil level and the second calculated value of the outer cylinder oil level.

[0094] Specifically, formula (6) is used to calculate the oil level of the outer cylinder of the hydraulic damper when the working condition n is just switched.

[0095]

[0096] Formula (7) and Formula (8) are used to calculate the oil level of the outer cylinder of the hydraulic damper at the end of working condition n.

[0097] When n = 1

[0098]

[0099] When n ≥ 2

[0100]

[0101] Among them, r ss(n) is the first calculated value of the oil level in the outer cylinder, r so(n) It is the second calculated value of the oil level in the external cylinder.

[0102] Step S108: Evaluate the stroke suitability of the hydraulic damper to be evaluated according to the calculated value of the oil level of the external cylinder.

[0103] Specifically, in the embodiment of the present invention, r is determined according to the order of switching of the working conditions. ss(n) and r so(n) Value, when r ss(n) or so(n) When a value of 0 or a negative value appears for the first time, the oil level of the outer cylinder of the hydraulic damper to be evaluated will reach the limit position under this working condition. The oil level of the outer cylinder of the hydraulic damper to be evaluated did not reach the limit position under each working condition before this working condition, and the stroke applicability evaluation passed. Under this working condition and the working conditions after this working condition, because the oil level of the outer cylinder will reach the limit position, the inner cylinder of the hydraulic damper to be evaluated may form an air cavity, and the performance of the hydraulic damper to be evaluated will be affected, and the stroke applicability evaluation will fail.

[0104] refer to Figure 2 , Figure 2 A schematic structural diagram of a hydraulic damper stroke suitability evaluation device provided by the present invention.

[0105] Specifically, Figure 2 As shown, the hydraulic damper stroke suitability evaluation device comprises:

[0106] The device information determining unit 201 is used to determine the device information of the hydraulic damper to be evaluated.

[0107] The structure size information acquisition unit 202 is used to acquire the structure size information of the hydraulic damper to be evaluated based on the equipment information of the hydraulic damper to be evaluated.

[0108] The detection and calculation unit 203 is used to detect the stroke of the hydraulic damper to be evaluated and the oil level of the outer cylinder, and calculate in combination with the structural size information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated.

[0109] The rate calculation unit 204 is used to calculate the oil leakage rate of the hydraulic damper to be evaluated according to the structural size information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder, so as to obtain the oil leakage rate of the hydraulic damper to be evaluated.

[0110] The operating condition determination unit 205 is used to determine the operating condition of the hydraulic damper to be evaluated.

[0111] The position change amount calculation unit 206 is used to calculate the position change amount of the outer cylinder piston of the hydraulic damper to be evaluated caused by the operating condition switching according to the operating condition of the hydraulic damper to be evaluated.

[0112] The oil level calculation unit 207 is used to calculate according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain the calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under the set working condition.

[0113] The stroke suitability evaluation unit 208 is used to evaluate the stroke suitability of the hydraulic damper to be evaluated according to the calculated value of the oil level of the external cylinder.

[0114] Specifically, the specific coordination operation process between the units in the hydraulic damper stroke suitability evaluation device here can refer to the above-mentioned hydraulic damper stroke suitability evaluation method, which will not be repeated here.

[0115] Since the hydraulic damper has a closed structure, once the hydraulic damper leaks oil, it is impossible to determine the internal oil level of the hydraulic damper through appearance inspection, so it is impossible to evaluate the current performance of the hydraulic damper, and it is even more impossible to predict whether the hydraulic damper is available during the working condition switching process, which will lead to serious risks and hidden dangers in the pipeline system. The present invention measures the oil level of the outer cylinder of the leaking hydraulic damper based on the ultrasonic oil level measurement method, evaluates the oil leakage rate of the hydraulic damper, and then accurately infers the oil level state of the hydraulic damper under various working conditions in combination with the structural design size, installation status and operating conditions of the hydraulic damper, thereby realizing the analysis and evaluation of its stroke applicability.

[0116] The present invention uses ultrasound to perform non-destructive detection of the oil level in the outer cylinder of the hydraulic damper, and for the first time realizes the visual measurement of the oil level status of the in-service hydraulic damper, achieving a leap from being unable to know to visual display. By comparing the measurement results of the oil level in the outer cylinder of the hydraulic damper with the theoretical derivation results, the oil leakage of the hydraulic damper can be accurately determined. Through multiple measurements at certain intervals, the accurate analysis and evaluation of the oil leakage rate of the hydraulic damper can be achieved, solving the problem that the oil leakage rate of the hydraulic damper cannot be assessed by collecting the amount of leaked hydraulic oil. Through the analysis and evaluation of the stroke applicability of the hydraulic damper, the current state of the leaking hydraulic damper and the effectiveness of the hydraulic damper under various working conditions in the later stage are determined, realizing all-round management of the oil leakage problem of the hydraulic damper.

[0117] In addition, an electronic device of the present invention includes a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program to implement a hydraulic damper stroke suitability evaluation method such as any one of the above. Specifically, according to an embodiment of the present invention, the process described with reference to the flowchart above can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed by an electronic device and when executed, it executes the above functions defined in the method of the embodiment of the present invention. The electronic device in the present invention can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone, or a server.

[0118] In addition, a storage medium of the present invention stores a computer program thereon, and when the computer program is executed by a processor, any of the above hydraulic damper stroke suitability evaluation methods is implemented. Specifically, it should be noted that the above storage medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device. In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0119] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0120] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0121] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0122] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0123] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for evaluating the stroke suitability of a hydraulic damper, characterized in that: The following steps are involved: Determine the equipment information of the hydraulic damper to be evaluated; Based on the equipment information of the hydraulic damper to be evaluated, obtaining the structural dimension information of the hydraulic damper to be evaluated; Detecting the stroke and the oil level of the outer cylinder of the hydraulic damper to be evaluated, and calculating in combination with the structural dimension information to obtain a stroke measurement value and an outer cylinder oil level measurement value of the hydraulic damper to be evaluated; Calculating according to the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder to obtain the oil leakage rate of the hydraulic damper to be evaluated; Determining the operating condition of the hydraulic damper to be evaluated; According to the operating condition of the hydraulic damper to be evaluated, calculating the change in position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the switching of the operating condition; Calculating according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain a calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under a set working condition; The stroke suitability of the hydraulic damper to be evaluated is evaluated according to the calculated value of the oil level of the outer cylinder.

2. The method for evaluating the stroke suitability of a hydraulic damper according to claim 1, characterized in that: The stroke measurement value of the hydraulic damper to be evaluated includes: a first stroke measurement value and a second stroke measurement value; the external cylinder oil level measurement value of the hydraulic damper to be evaluated includes: a first external cylinder oil level measurement value and a second external cylinder oil level measurement value; The detecting of the stroke and the oil level of the outer cylinder of the hydraulic damper to be evaluated and the calculation combined with the structural dimension information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated includes: Measuring the stroke and the external cylinder of the hydraulic damper to be evaluated and calculating them in combination with the structural dimension information to obtain a first stroke measurement value and a first external cylinder oil level measurement value; The stroke and the external cylinder of the hydraulic damper to be evaluated are measured for a second time and calculated in combination with the structural dimension information to obtain a second stroke measurement value and a second external cylinder oil level measurement value.

3. The method for evaluating the stroke suitability of a hydraulic damper according to claim 2, characterized in that: The structural dimension information of the hydraulic damper to be evaluated includes: the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, and the outer diameter of the outer cylinder of the hydraulic damper to be evaluated; The measuring the stroke and the external cylinder of the hydraulic damper to be evaluated and calculating in combination with the structural dimension information to obtain the first stroke measurement value and the first external cylinder oil level measurement value comprises: Measuring the current stroke of the hydraulic damper to be evaluated to obtain a first stroke measurement value of the hydraulic damper to be evaluated; Calculate according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the first stroke measurement value to obtain a first theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate; Performing detection and positioning according to the first theoretical value to obtain a first measured distance of the hydraulic damper to be evaluated; The first outer cylinder oil level measurement value is obtained by performing calculation according to the first measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated.

4. The method for evaluating the stroke suitability of a hydraulic damper according to claim 3, characterized in that: The second measurement of the stroke and the external cylinder of the hydraulic damper to be evaluated and the calculation combined with the structural dimension information to obtain the second stroke measurement value and the second external cylinder oil level measurement value includes: After a preset measurement time interval, measuring the current stroke of the hydraulic damper to be evaluated to obtain a second stroke measurement value of the hydraulic damper to be evaluated; Calculate according to the total stroke of the hydraulic damper to be evaluated, the thickness of the rear cylinder cover of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, and the second stroke measurement value to obtain a second theoretical value of the distance between the front edge of the outer cylinder piston of the hydraulic damper to be evaluated and the outer edge of the rear cover plate; Performing detection and positioning according to the second theoretical value to obtain a second measured distance of the hydraulic damper to be evaluated; The second outer cylinder oil level measurement value is obtained by performing calculation according to the second measured distance and the thickness of the rear cylinder cover of the hydraulic damper to be evaluated.

5. The method for evaluating the stroke suitability of a hydraulic damper according to claim 4, characterized in that: The step of calculating according to the structural dimension information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder to obtain the oil leakage rate of the hydraulic damper to be evaluated comprises: The oil leakage rate of the hydraulic damper to be evaluated is obtained by calculation based on the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, the outer diameter of the outer cylinder of the hydraulic damper to be evaluated, the first stroke measurement value, the second stroke measurement value, the first outer cylinder oil level measurement value, the second outer cylinder oil level measurement value and the preset measurement time interval.

6. The method for evaluating the stroke suitability of a hydraulic damper according to claim 1, characterized in that: The step of calculating the change in position of the outer cylinder piston of the hydraulic damper to be evaluated caused by the switching of the operating conditions according to the operating conditions of the hydraulic damper to be evaluated comprises: Based on the operating conditions, calculating a change in the axial length of the hydraulic damper to be evaluated between two adjacent operating conditions; The change in the position of the outer cylinder piston is obtained by calculation based on the change in the axial length of the hydraulic damper to be evaluated, the inner piston rod diameter of the hydraulic damper to be evaluated, the inner diameter of the outer cylinder of the hydraulic damper to be evaluated, and the outer diameter of the outer cylinder of the hydraulic damper to be evaluated.

7. The method for evaluating the stroke suitability of a hydraulic damper according to claim 2, characterized in that: The calculated value of the external cylinder oil level includes: a first calculated value of the external cylinder oil level of the hydraulic damper to be evaluated when switching to the set working condition, and a second calculated value of the external cylinder oil level of the hydraulic damper to be evaluated when the set working condition ends; The step of calculating according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level to obtain the calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under the set working condition comprises: The first calculated value of the outer cylinder oil level and the second calculated value of the outer cylinder oil level are calculated based on the change in the outer cylinder piston position, the second outer cylinder oil level measurement value, the oil leakage rate and the working condition duration, to obtain the first calculated value of the outer cylinder oil level and the second calculated value of the outer cylinder oil level.

8. A hydraulic damper stroke suitability evaluation device, characterized in that: include: A device information determination unit, used to determine device information of the hydraulic damper to be evaluated; A structural dimension information acquisition unit, configured to acquire structural dimension information of the hydraulic damper to be evaluated based on device information of the hydraulic damper to be evaluated; A detection and calculation unit, used to detect the stroke of the hydraulic damper to be evaluated and the oil level of the outer cylinder, and calculate in combination with the structural size information to obtain the stroke measurement value and the outer cylinder oil level measurement value of the hydraulic damper to be evaluated; A rate calculation unit, used to calculate according to the structural size information of the hydraulic damper to be evaluated, the stroke measurement value of the hydraulic damper and the oil level measurement value of the external cylinder, to obtain the oil leakage rate of the hydraulic damper to be evaluated; A working condition determination unit, used to determine the operating condition of the hydraulic damper to be evaluated; A position change calculation unit, used to calculate the position change of the outer cylinder piston of the hydraulic damper to be evaluated caused by the operating condition switching according to the operating condition of the hydraulic damper to be evaluated; An oil level calculation unit, used to calculate according to the change in the position of the outer cylinder piston and the measured value of the outer cylinder oil level, to obtain a calculated value of the outer cylinder oil level of the hydraulic damper to be evaluated under a set working condition; The stroke suitability evaluation unit is used to evaluate the stroke suitability of the hydraulic damper to be evaluated according to the calculated value of the oil level of the external cylinder.

9. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the steps of the method for evaluating the stroke suitability of a hydraulic damper according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the hydraulic damper stroke suitability evaluation method as claimed in any one of claims 1 to 7 by calling the computer program stored in the memory.

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