CN114379619A - Electro-hydraulic switch machine and fault diagnosis system thereof - Google Patents
Electro-hydraulic switch machine and fault diagnosis system thereof Download PDFInfo
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- CN114379619A CN114379619A CN202111499153.1A CN202111499153A CN114379619A CN 114379619 A CN114379619 A CN 114379619A CN 202111499153 A CN202111499153 A CN 202111499153A CN 114379619 A CN114379619 A CN 114379619A
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- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
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Abstract
The application provides an electric-hydraulic switch machine and fault diagnosis system thereof, and the fault diagnosis system comprises: the hydraulic monitoring assembly is used for acquiring hydraulic data in the switching process of an electro-hydraulic switch machine, and the hydraulic data at least comprises a plurality of hydraulic values of a main oil cylinder and an auxiliary oil cylinder of the electro-hydraulic switch machine under the same sampling frequency in the switching process; and the control center comprises a communication module and an analysis module, the communication module is in communication connection with the hydraulic monitoring assembly to receive the hydraulic data, and the analysis module is used for counting and operating the hydraulic data to obtain a fault analysis result. According to the technical scheme, the fault diagnosis efficiency of the electro-hydraulic switch machine can be improved, and the diagnosis cost is reduced.
Description
Technical Field
The application relates to the field of railway equipment, in particular to an electro-hydraulic switch machine and a fault diagnosis system thereof.
Background
A switch is a device on a railroad line that allows a train vehicle to travel from one line to another. The switch machine is used for reliably converting the position of the turnout, changing the opening direction of the turnout, locking the switch point rail and reflecting important signal basic equipment of the position of the turnout, so that the running safety can be well ensured, and the transportation efficiency is improved. In the speed-up turnouts updated in recent years, the proportion of electro-hydraulic switch machines is higher and higher.
Taking the ZYJ7 electro-hydraulic switch machine as an example, a motor is adopted to drive an oil pump to output high-pressure oil which is sent into an oil cylinder, a piston rod is fixed, the oil cylinder moves to drive an action and display device to work, so that the switch and the locking of the turnout are realized, and the state of the turnout is reflected. Specifically, as shown in fig. 1, when the motor drives the oil pump to rotate counterclockwise, the oil pump sucks oil from the right cavity of the oil cylinder, high-pressure oil flowing out of the oil pump enters the left cavity of the oil cylinder through the cavity of the piston rod, so that the left cavity of the oil cylinder is high-pressure, and the oil cylinder moves leftwards; when the oil cylinder stops at an extreme, the oil pump sucks oil from the check valve on the right side, and the high-pressure oil flowing out returns to the oil tank through the oil filter and the overflow valve on the left side. If the motor drives the oil pump to rotate clockwise, the oil pump sucks oil from the left cavity of the oil cylinder, high-pressure oil flowing out of the oil pump enters the right cavity of the oil cylinder through the cavity of the piston rod, so that the right cavity of the oil cylinder is high-pressure, and the oil cylinder moves rightwards at the moment. The direction of the pressure difference between the left cavity and the right cavity of the oil cylinder is changed, so that the oil cylinder acts in the opposite direction, and the turnout is switched to be positioned or reversed according to the requirement.
According to the working principle of the electro-hydraulic switch machine, the structure is complex, and various components such as a mechanical mechanism, a motor electrical appliance, a hydraulic oil way and the like are involved, so that the fault types are various, and the fault diagnosis difficulty is high. Traditional detection mode is usually that the higher cost of payment sets up monitoring module respectively in the work area that easily breaks down, or through increasing the human cost to increase daily maintainer's working strength.
Therefore, how to provide an efficient and simple fault diagnosis scheme for the electro-hydraulic switch machine becomes a technical problem to be solved in the field.
Disclosure of Invention
In view of this, the present application provides an electro-hydraulic switch machine and a fault diagnosis system thereof, so as to improve the fault diagnosis efficiency of the electro-hydraulic switch machine, reduce the diagnosis cost, and provide an efficient, simple and convenient fault diagnosis scheme for the electro-hydraulic switch machine.
According to the application, a fault diagnosis system of an electro-hydraulic switch machine is provided, which comprises: the hydraulic monitoring assembly is used for acquiring hydraulic data in the switching process of an electro-hydraulic switch machine, and the hydraulic data at least comprises a plurality of hydraulic values of a main oil cylinder and an auxiliary oil cylinder of the electro-hydraulic switch machine under the same sampling frequency in the switching process; and the control center comprises a communication module and an analysis module, the communication module is in communication connection with the hydraulic monitoring assembly to receive the hydraulic data, and the analysis module is used for counting and operating the hydraulic data to obtain a fault analysis result.
Preferably, the hydraulic monitoring assembly comprises at least one first measuring element arranged on the master cylinder and at least one second measuring element arranged on the slave cylinder; the first measuring element and the second measuring element are in communication connection with the communication module in a wired or wireless mode.
Preferably, the first measuring element and the second measuring element are hydraulic sensors arranged in oil chambers of the main oil cylinder and the auxiliary oil cylinder or electronic hydraulic gauges communicated with the oil chambers.
Preferably, the hydraulic monitoring assembly comprises at least one third measuring element, which is arranged on a starting cylinder of the electro-hydraulic switch machine and is used for monitoring the oil pressure change in the starting cylinder in real time.
Preferably, the measurement sampling frequency of the first and second measuring elements is 5-20Hz, preferably 10 Hz.
Preferably, the control center comprises an instruction module, and the instruction module is used for generating a disposal instruction according to the fault analysis result; the fault diagnosis system comprises a preprocessing device which is in communication connection with the instruction module and is used for giving an alarm according to the handling instruction and/or simply handling the electro-hydraulic switch machine.
Preferably, the pretreatment device comprises: the sound and/or optical alarm is used for carrying out sound alarm and/or light alarm according to the treatment instruction; and/or a safety switch which is connected in series with a power supply circuit of a motor of the electro-hydraulic switch machine and is used for disconnecting the power supply circuit according to the handling instruction.
Preferably, the communication module, the analysis module and the instruction module are respectively and independently arranged and are in communication connection with each other; or the communication module, the analysis module and the instruction module are integrated on the same programmable logic controller.
Preferably, the fault diagnosis system comprises an operation terminal, the operation terminal comprises a display unit and a human-computer interaction unit, the display unit is in communication connection with the analysis module and is used for displaying the hydraulic data and the fault analysis result, and the human-computer interaction unit is in communication connection with the instruction module and is used for manually controlling the instruction module to generate a disposal instruction.
The application also provides an electro-hydraulic switch machine, which comprises an oil pool, a main working oil way, an auxiliary working oil way, a starting oil cylinder, a motor and an oil pump; the main working oil way and the auxiliary working oil way are respectively provided with a main oil cylinder and an auxiliary oil cylinder, and two sides of the main oil cylinder and the auxiliary oil cylinder are respectively connected with an adjusting valve in series; the oil pump is driven by the motor, and the starting oil cylinder, the main working oil way and the auxiliary working oil way are communicated with the oil pump in parallel; two sides of the oil pump are communicated to the oil pool through an oil supply oil path and an overflow oil path, at least one-way valve is arranged on the oil supply oil path, and an overflow valve and a filter are arranged on the overflow oil path; the electro-hydraulic switch machine further comprises a fault diagnosis system, wherein the fault diagnosis system is the fault diagnosis system of the electro-hydraulic switch machine.
According to the technical scheme, the hydraulic system is a central link of the electro-hydraulic switch machine, and hydraulic faults, motor electrical faults and mechanical faults can be basically reflected to the change of the hydraulic pressure, so that the hydraulic monitoring assembly is used for measuring the oil pressure change of a main oil cylinder and an auxiliary oil cylinder of the electro-hydraulic switch machine in the working process at fixed frequency, and then counting and calculating hydraulic data according to the analysis module to obtain a fault analysis result, so that a high-efficiency, simple and convenient fault diagnosis and monitoring mode is realized.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an embodiment of the invention and, together with the description, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the operation principle of the ZYJ7 electro-hydraulic switch machine;
fig. 2 is a schematic diagram of the working principle of the electro-hydraulic switch machine and the fault diagnosis system thereof according to the preferred embodiment of the application;
FIG. 3 is a flow chart of statistics and calculations performed by the analysis module of the fault diagnosis system according to the present application;
fig. 4 is a flowchart of the operation of the fault diagnosis system.
Detailed Description
In order to adapt to the development of a railway crossing type, a great deal of new technologies and continuous horse feeding of new equipment provide higher requirements for maintenance personnel, in the speed-up turnouts updated in recent years, the proportion occupied by the ZYJ7 type hydraulic turnout is the first turn, and compared with the S700K turnout switch, the ZYJ7 type electric-hydraulic turnout switch has the advantages that although the frequency of faults is not large, the electric-hydraulic turnout switch is more complex in structure and relates to various components such as mechanical mechanisms, motor electrical appliances, hydraulic oil ways and the like, so that the types of faults are various, and the fault diagnosis difficulty is high. In view of this, the present application provides a fault diagnosis scheme for an electro-hydraulic switch machine based on hydraulic measurement data, in which the hydraulic system is a central link of the electro-hydraulic switch machine, and electrical and mechanical faults of a motor can be basically reflected to changes in hydraulic pressure.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fault diagnosis method of electro-hydraulic switch machine
According to the technical scheme of the application, the method for diagnosing the faults of the electro-hydraulic switch machine based on the hydraulic measurement data firstly needs to install at least one hydraulic monitoring device on each of the main working oil cylinder and the auxiliary working oil cylinder of the electro-hydraulic switch machine, and starts to acquire the hydraulic data of the two oil cylinders when the switch is started. Taking the ZYJ7 electro-hydraulic switch as an example, the switching process can be completed in about 8 seconds under the normal condition, the hydraulic data adopts a fixed sampling frequency, such as 10Hz, the sampling time of each switching is 8 seconds, and 160 hydraulic data of two sensors are collected in each switching process. The hydraulic data contains state information of the electro-hydraulic switch machine, and feature extraction, fault classification and identification of the hydraulic data can be realized through hydraulic data analysis. It should be understood by those skilled in the art that the operational data involved in the following diagnostic method is explained by taking the above data as an example, but the present application is not limited thereto, and the present application is not limited to the specific data in the following operational process, and falls within the scope of the present application within the technical idea of the present application.
As shown in fig. 3 and 4, to simplify the operation steps, according to the fault diagnosis method of the present application, the 160 hydraulic data are first subjected to fused data statistics. The electro-hydraulic switch machine running state feature vector is extracted according to the hydraulic data.
Specifically, let X be { X ═ X ] as the hydraulic data collected during each switching process1,x2,x3,……xn1,2,3, 160), in order to realize state feature extraction, the hydraulic data of each second is averaged according to the low-frequency characteristic of the hydraulic data, that is, the hydraulic data of each second is averaged, that is, the state feature extraction is realized
Representing hydraulic pressure characteristics per second, finally by normalization
The feature vector is set to [0,1 ]]And obtaining a 16-dimensional standardized feature vector representing the state feature of each switching process of the electro-hydraulic switch machine. It can be understood that different types of electro-hydraulic switch machines may have different switch durations, so that the sampling time may be less than 8s or greater than 8s, and the sampling frequency may be less than 10Hz or greater than 8 Hz according to different actual measurement environmentsAnd 10Hz, and other multi-dimensional standardized feature vectors can be obtained through the fused data statistical step according to different sampling conditions.
After the 16-dimensional standardized feature vector is obtained, the fault diagnosis method can perform data analysis operation on hydraulic data based on Self-organizing map (SOM) algorithm or k-means clustering algorithm (k-means clustering algorithm) to obtain a fault analysis result.
Based on a self-organizing mapping algorithm, obtaining N types of classification results according to the algorithm, and then determining a specific fault form according to the hydraulic pressure curve characteristics of the main oil cylinder and the auxiliary oil cylinder in each type of data, wherein the method specifically comprises the following operation steps:
step 1: constructing an SOM neural network, wherein the SOM neural network consists of an input layer and an output layer, neurons are in a full-connection form between the layers, the number characteristic vector dimensions of the neurons in the input layer are the same and are all 16, the neurons in the output layer form a two-dimensional plane form, 100 times of switching process data are taken as training and diagnosis samples according to the time sequence, and the neurons in the output layer are taken as
Step 2: the SOM neural network is trained. (1) The fully-connected weight W is first initialized to [0,1 ]]A random number in between; (2) randomly taking an input sample X*Traversing each node in the competition layer: calculating X using Euclidean distance*Similarity with nodes, distance selection
The smallest node is used as a winner node c; (3) updating the connection weight of the node c and the neighborhood nodes: wv(t+1)＝Wv(t)+θ(v,c,t)α(t)(X*-Wv(t)), wherein W isv(t) represents the weight W of the neighborhood node v at the training time t,
for the neighborhood function, i.e. closer to the winner node, the larger the update magnitude, the further awayThe winner node, the smaller the update amplitude, and δ (t) decreases with increasing t,
the learning rate is reduced along with the increase of the training times; (4) and (4) completing a round of iteration, and returning to the step (2) until the set iteration time T is met.
And step 3: and determining classification according to the distance between the nodes of the output layer. (1) Diagnosis sample pair using trained model
Is classified according to
Obtaining a Voronoi set of each neuron according to the distance between the neuron and the neuron of the output layer, and if the Voronoi set of the neuron is empty, rejecting the neuron; (2) calculating the distance between each effective neuron and adjacent effective neurons, and calculating the average distance
(3) According to the distance between two adjacent effective neurons i, j, if
The i, j neurons belong to the same class, all valid neurons are classified into M classes, each class is expressed as Um(ii) a (4) And (3) checking an intra-class relationship: suppose that i, j neurons belong to the same class if
The similarity of the i neuron and other neurons in the class is smaller, the i neuron does not belong to the class, and if the number of non-intra-class neurons obtained by the intra-class relation test is more than 10%, M is M + 1. (5) If M is>And 2, faults exist in the switching process, the characteristic quantities of all dimensions of the data in the class are respectively averaged, and finally the specific type of the faults is obtained through analysis.
Based on a K-means clustering algorithm, a clustering result is obtained according to a K-means clustering method, then a specific fault form is determined according to the characteristics of a left hydraulic pressure curve and a right hydraulic pressure curve in each type of data, and the specific fault is obtained by analyzing and comparing according to a pressure curve model, and the method specifically comprises the following operation steps:
step 1: and setting the number of classes as K-2, and performing K-clustering. (1) Randomly selecting j point as a clustering center C1Calculating the distance from each of the other points to j point
Selection DijThe largest point being another cluster center Ck(ii) a (2) Sequentially comparing the distance from each point to each cluster center, and distributing the point to the cluster of the cluster center closest to the point to obtain two clusters { U }1,U2}; (3) mean of individual dimensions by all points within a cluster of classes
Recalculating a new cluster center; (4) if C is presenttIf the convergence is not a fixed point, returning to the step (2) to continue execution; otherwise, the next step is entered.
Step 2: and (4) performing K-clustering test. Calculating the average distance a (i) in the class and the average distance b (i) between the classes of the point i respectively if
If the K-clustering can not meet the clustering requirement, if the K is K +1, returning to the step 1, and continuing the K-clustering; otherwise, the next step is entered.
And step 3: if K is 2, no fault exists; otherwise, faults exist in the switching process, the characteristic quantities of all dimensions of the data in the class are respectively averaged, and finally the specific type of the faults is obtained through analysis.
Fault diagnosis system of electro-hydraulic switch machine
According to the fault diagnosis method of the electro-hydraulic switch machine, the fault of most of the electro-hydraulic switch machines can be quickly discriminated without carrying out complex observation on the electro-hydraulic switch machine and only by acquiring the hydraulic pressure data of the oil cylinder, so that an efficient, simple and convenient fault diagnosis and monitoring mode is realized. Based on the fault diagnosis method of the electro-hydraulic switch machine, the application also provides the electro-hydraulic switch machine and a fault diagnosis system thereof.
As shown in fig. 2, the fault diagnosis system of the electro-hydraulic switch machine of the present application includes: a hydraulic monitoring assembly 10 and a control center 20. The hydraulic monitoring assembly 10 is used for collecting hydraulic data in a switching process of the electro-hydraulic switch machine, wherein the hydraulic data at least comprises a plurality of hydraulic values of a main oil cylinder 101 and an auxiliary oil cylinder 102 of the electro-hydraulic switch machine under the same sampling frequency in the switching process; the control center 20 comprises a communication module 21 and an analysis module 22, the communication module 21 is in communication connection with the hydraulic monitoring assembly 10 to receive hydraulic data, and the analysis module 22 is used for obtaining a fault analysis result according to the hydraulic data. The fault diagnosis system measures the oil pressure change of a main oil cylinder and an auxiliary oil cylinder of the electro-hydraulic switch machine in the working process at fixed frequency through the hydraulic monitoring assembly 10, and then carries out statistics and operation on hydraulic data through the analysis module based on the fault diagnosis method to obtain a fault analysis result, so that the high-efficiency, simple and convenient fault diagnosis and monitoring system for the electro-hydraulic switch machine is realized.
In the above fault diagnosis system, the hydraulic monitoring assembly 10 at least includes at least one first measuring element 11 disposed on the master cylinder 101 and at least one second measuring element 12 disposed on the slave cylinder 102, wherein the first measuring element 11 and the second measuring element 12 are in communication connection with the communication module 21 in a wired or wireless manner, so as to be able to transmit the measured hydraulic data to the control center 20 instantly. The first measuring element 11 and the second measuring element 12 are preferably provided with at least two, respectively, so as to be able to measure the left and right oil chambers of the master cylinder 101 and the slave cylinder 102, respectively, in different switching directions. Wherein, the measurement sampling frequency of the first measuring element 11 and the second measuring element 12 can be 5-20Hz, preferably 10Hz, according to different precision requirements. The first measuring element 11 and the second measuring element 12 may be hydraulic sensors disposed in oil chambers of the master cylinder 101 and the slave cylinder 102 or electronic hydraulic gauges communicated with the oil chambers.
On the basis of the first measuring element 11 and the second measuring element 12, the hydraulic monitoring assembly 10 may further include at least one third measuring element 13, where the third measuring element 13 is disposed on the starting cylinder 103 of the electro-hydraulic switch machine and is used for monitoring the oil pressure change in the starting cylinder 103 in real time. The sampling frequency of the third measuring element 13 can be the same as or different from that of the first measuring element 11 and the second measuring element 12, and preferably, the third measuring element 13 continuously measures the oil pressure in the starting cylinder during the operation of the electro-hydraulic switch machine. Whether the oil pressure of the electro-hydraulic switch machine in the starting process is normal can be observed more intuitively through the third measuring element 13. The third measuring element 13 may be a hydraulic sensor disposed in the oil chamber of the start cylinder 103 or an electronic hydraulic gauge communicated with the oil chamber.
According to the fault diagnosis system of the electro-hydraulic switch machine of any of the above embodiments, the fault diagnosis method according to the present application can implement efficient diagnosis of faults through simple data sampling, and in order to further improve the fault handling capability of the fault diagnosis system when the diagnosis is completed, the control center 20 may further include the instruction module 23 and the preprocessing device 30. As shown in fig. 2 and 4, the instruction module 23 is configured to generate a handling instruction according to the failure analysis result; the preprocessing device 30 is connected in communication with the instruction module 23, and is used for alarming according to the handling instruction and/or simply handling the electro-hydraulic switch machine. Among them, the preprocessing device 30 may include: the sound and/or optical alarm is used for carrying out sound alarm and/or light alarm according to the treatment instruction so as to remind workers that the electro-hydraulic switch machine has a fault and needs to be processed; and/or a safety switch connected in series with the power supply circuit of the electric machine 104 of the electro-hydraulic switch machine for disconnecting the power supply circuit according to the handling instructions to prevent further damage caused by the electro-hydraulic switch machine operating in a fault condition. Furthermore, the preprocessing unit 30 may also include other simple processing devices to save manpower, such as smoothing, low-pass filtering, etc.
The communication module 21, the analysis module 22 and the instruction module 23 of the control center 20 may be independently arranged working modules respectively, and are in communication connection with each other; alternatively, the communication module 21, the analysis module 22 and the instruction module 23 may be different more partitions of the same device, such as different functional components integrated on the same programmable logic controller, or a terminal such as a computer with corresponding functional programs.
As shown in fig. 2, the fault diagnosis system may further include an operation terminal 40, and the operation terminal 40 includes a display unit 41 and a human-machine interaction unit 42. The display unit 41 is in communication connection with the analysis module 22 and is used for displaying hydraulic data and a fault analysis result so as to facilitate a worker to obtain information in real time; the human-computer interaction unit 42 is in communication connection with the instruction module 23, and is used for manually controlling the instruction module 23 to generate a handling instruction so as to trigger the instruction module 23 through the manual instruction in the case that the electro-hydraulic switch machine needs to be simply handled remotely or faults are judged manually in advance. The display unit 41 and the human-computer interaction unit 42 may be a display screen and a keyboard panel, which are respectively arranged, or the display unit 41 and the human-computer interaction unit 42 may be integrated into a display terminal capable of being operated by a touch screen, or may be assisted by a corresponding program through a daily terminal of a tablet computer or a mobile phone to serve as the operation terminal 40.
According to the fault diagnosis system of the electro-hydraulic switch machine in the preferred embodiment of the application, in the working process of the electro-hydraulic switch machine, the hydraulic data of the main oil cylinder, the auxiliary oil cylinder and/or the starting oil cylinder of the electro-hydraulic switch machine are collected, and the control center 20 can conveniently screen common faults of most of the electro-hydraulic switch machines according to the hydraulic data based on the fault diagnosis method, so that the fault monitoring facilities are greatly simplified, and the diagnosis efficiency is improved. In addition, the fault diagnosis system can be combined with the traditional fault diagnosis means (such as monitoring on the motor current, the oil tank liquid level, the notch offset and the like) to improve the accuracy of fault diagnosis.
Electrohydraulic switch machine
On the basis of the fault diagnosis method and the fault diagnosis system, the application also provides an electro-hydraulic switch machine which comprises an oil pool 100, a main working oil way, an auxiliary working oil way, a starting oil cylinder 103, a motor 104 and an oil pump 105. The main working oil path and the auxiliary working oil path are respectively provided with a main oil cylinder 101 and an auxiliary oil cylinder 102, and two sides of the main oil cylinder 101 and two sides of the auxiliary oil cylinder 102 are respectively connected in series with a regulating valve 106; the oil pump 105 is driven by the motor 104, and the starting cylinder 103, the primary working oil path and the secondary working oil path are communicated with the oil pump 105 in parallel; both sides of the oil pump 105 are communicated to the oil pool 100 through an oil supply path and an overflow path, the oil supply path is provided with at least one check valve 107, and the overflow path is provided with an overflow valve 108 and a filter 109. As shown in fig. 2, the electro-hydraulic switch machine comprises the fault diagnosis system of any of the embodiments described above, so that intelligent fault diagnosis of the electro-hydraulic switch machine, automatic alarm and/or simple pre-treatment of faults can be realized under simpler detection means.
The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.
In addition, any combination of the various embodiments of the present application is also possible, and the same should be considered as disclosed in the present application as long as it does not depart from the idea of the present application.
Claims (10)
1. A fault diagnosis system of an electro-hydraulic switch machine, wherein the fault diagnosis system comprises:
the hydraulic monitoring assembly (10) is used for collecting hydraulic data in a switching process of an electro-hydraulic switch machine, and the hydraulic data at least comprises a plurality of hydraulic values of a main oil cylinder (101) and an auxiliary oil cylinder (102) of the electro-hydraulic switch machine in the switching process at the same sampling frequency; and
the control center (20) comprises a communication module (21) and an analysis module (22), the communication module (21) is in communication connection with the hydraulic monitoring assembly (10) to receive the hydraulic data, and the analysis module (22) is used for obtaining a fault analysis result according to the hydraulic data.
2. The system for diagnosing faults of an electro-hydraulic switch machine according to claim 1, wherein said hydraulic monitoring assembly (10) comprises at least one first measuring element (11) arranged to a master cylinder (101) and at least one second measuring element (12) arranged to a slave cylinder (102);
the first measuring element (11) and the second measuring element (12) are in communication connection with the communication module (21) in a wired or wireless manner.
3. The system of claim 2, wherein the first and second measuring elements (11, 12) are hydraulic sensors disposed in oil chambers of the master cylinder (101) and the slave cylinder (102) or electronic hydraulic gauges connected to the oil chambers.
4. A system for diagnosing faults of an electro-hydraulic switch machine according to claim 2, wherein said hydraulic monitoring assembly (10) comprises at least one third measuring element (13), said third measuring element (13) being arranged on a starting cylinder (103) of said electro-hydraulic switch machine for monitoring in real time the variations of the oil pressure inside said starting cylinder (103).
5. The system for diagnosing faults of an electro-hydraulic switch machine according to claim 2, wherein the first measuring element (11) and the second measuring element (12) have a measuring sampling frequency of 5-20Hz, preferably 10 Hz.
6. The system for diagnosing faults of an electro-hydraulic switch machine according to claim 1, wherein said control center comprises an instruction module (23), the instruction module (23) being configured to generate a handling instruction according to the result of said fault analysis;
the fault diagnosis system comprises a preprocessing device (30), wherein the preprocessing device (30) is in communication connection with the instruction module (23) and is used for giving an alarm according to the handling instruction and/or simply handling the electro-hydraulic switch machine.
7. The system of diagnosing faults of an electro-hydraulic switch machine according to claim 6, wherein said preprocessing means (30) comprise:
the sound and/or optical alarm is used for carrying out sound alarm and/or light alarm according to the treatment instruction; and/or
A safety switch connected in series with a power supply circuit of an electric machine (104) of the electro-hydraulic switch machine for disconnecting the power supply circuit according to the handling instruction.
8. The system for diagnosing faults of an electro-hydraulic switch machine as claimed in claim 6, wherein said communication module (21), analysis module (22) and command module (23) are independently provided and are communicatively connected to each other; or the communication module (21), the analysis module (22) and the instruction module (23) are integrated on the same programmable logic controller.
9. Fault diagnosis system of electro-hydraulic switch machines according to claim 6, wherein the fault diagnosis system comprises an operation terminal (40), the operation terminal (40) comprising a display unit (41) and a human-machine interaction unit (42),
the display unit (41) is in communication connection with the analysis module (22) and is used for displaying the hydraulic data and the fault analysis result, and the human-computer interaction unit (42) is in communication connection with the instruction module (23) and is used for manually controlling the instruction module (23) to generate a disposal instruction.
10. The electro-hydraulic switch machine comprises an oil pool (100), a main working oil way, an auxiliary working oil way, a starting oil cylinder (103), a motor (104) and an oil pump (105);
a main oil cylinder (101) and an auxiliary oil cylinder (102) are respectively arranged on the main working oil path and the auxiliary working oil path, and regulating valves (106) are respectively connected in series on two sides of the main oil cylinder (101) and the auxiliary oil cylinder (102);
the oil pump (105) is driven by the motor (104), and the starting oil cylinder (103), the main working oil path and the auxiliary working oil path are communicated with the oil pump (105) in parallel;
both sides of the oil pump (105) are communicated to the oil pool (100) through an oil supply oil path and an overflow oil path, at least one-way valve (107) is arranged on the oil supply oil path, and an overflow valve (108) and a filter (109) are arranged on the overflow oil path;
wherein the electro-hydraulic switch machine further comprises a fault diagnosis system, and the fault diagnosis system is the fault diagnosis system of the electro-hydraulic switch machine as claimed in any one of claims 1 to 9.
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