CN218971560U - Hydraulic pressure detecting system - Google Patents
Hydraulic pressure detecting system Download PDFInfo
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- CN218971560U CN218971560U CN202223188276.6U CN202223188276U CN218971560U CN 218971560 U CN218971560 U CN 218971560U CN 202223188276 U CN202223188276 U CN 202223188276U CN 218971560 U CN218971560 U CN 218971560U
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Abstract
The utility model provides a hydraulic pressure detecting system. The hydraulic pressure detecting system comprises a central hydraulic pressure source and a calibration measuring system for measuring parameters of terminal equipment A, wherein the number of the terminal equipment A is multiple, and the terminal equipment A is connected in parallel and simultaneously connected in series with one central hydraulic pressure source; and each terminal device is connected with a self-measuring system for measuring B parameters of the terminal device, and the calibration measuring systems are connected in series with the self-measuring systems in a one-to-one correspondence manner. The hydraulic detection system provides detection of anti-crosstalk characteristics for each terminal device and detection of the anti-crosstalk characteristics among the terminal devices under the unspecified combination condition; the crosstalk resistance of each terminal device can be verified and calibrated, so that the requirements of networking of electrohydraulic systems of a plurality of terminal devices are met, and the important conditions of realizing specific functions of each terminal device are met.
Description
Technical Field
The utility model relates to a hydraulic detection system which is applied to the detection field of cluster networking of a plurality of hydraulic terminal devices.
Background
In recent years, a central hydraulic source is innovated and developed in theory and practice, and a central hydraulic source based on networking sharing of a plurality of hydraulic terminal devices and a hydraulic configuration method thereof are proposed and applied in engineering, so that an oil source is shared in parallel with a plurality of terminal devices, and a proportional reversing loop, a proportional pressure regulating loop and a proportional flow regulating loop are arranged in the plurality of terminal devices. This forms a hydraulic system for clustered networking. The advantages are that: the defects of the traditional typical centralized pump station configuration mode are overcome from the source, and the economic and social benefits of unified planning, reasonable layout and advanced technology are achieved.
The core technology of the central hydraulic source is that one oil source works, a plurality of terminals are shared, and the terminals do not cross each other. That is, a central hydraulic source and a plurality of terminal devices are networked, and each terminal device can be independent and is 'one-to-many'. When a plurality of terminal devices start-stop or operate, mutual crosstalk (such as flow fluctuation, pressure fluctuation, load fluctuation and the like) is unavoidable between the terminal devices. Thus, real-time detection for crosstalk is required.
The hydraulic circuit of the solid-liquid engine in-situ calibration power source disclosed in the prior patent publication No. CN106884831A can continuously change the valve opening of the electro-hydraulic proportional valve through the voltage signal of the external potentiometer so as to solve the problem of stepless pressure regulation of the pressure control valve. However, the device is only used for characteristic test of a single hydraulic terminal device (namely, one power source corresponds to one terminal device), and the mutual crosstalk of one hydraulic terminal device does not exist, so that the device cannot realize detection of terminal crosstalk of a hydraulic system which is shared by a plurality of terminals and works by one oil source.
Disclosure of Invention
The utility model aims to provide a hydraulic detection system which can realize the detection of terminal crosstalk of a hydraulic system which works with one oil source and is shared by a plurality of terminals.
The technical scheme of the utility model is as follows: the hydraulic pressure detecting system comprises a central hydraulic pressure source and a calibration measuring system for measuring parameters of terminal equipment A, wherein the number of the terminal equipment A is a plurality of terminal equipment A, and the plurality of terminal equipment A are connected in parallel and simultaneously connected in series with one central hydraulic pressure source; and each terminal device is connected with a self-measuring system for measuring B parameters of the terminal device, and the calibration measuring systems are connected in series with the self-measuring systems in a one-to-one correspondence manner.
Preferably, one of the plurality of terminal devices is an actuator cylinder running-in test bed, and the rest is a hydraulic comprehensive test bed; the calibration measurement system comprises a calibration measurement system C and a calibration measurement system D; the self-measuring system comprises a self-measuring system E and a self-measuring system F; each hydraulic comprehensive test bench is provided with a self-measuring system E, the self-measuring systems E are connected with the calibration measuring systems C in a one-to-one correspondence mode, each actuator cylinder running-in test bench is provided with a self-measuring system F, and the self-measuring systems F are connected with the calibration measuring systems D.
Preferably, the self-measuring system E comprises a terminal equipment flowmeter and a stop valve which are connected on an oil return path of the hydraulic comprehensive test bed, and also comprises a terminal equipment pressure sensor which is connected on an oil inlet path of the hydraulic comprehensive test bed; the calibration measurement system C comprises a calibration system flowmeter and a calibration system pressure sensor, and the calibration system flowmeter is connected with the calibration system pressure sensor and is connected with an oil inlet path and an oil return path of the hydraulic comprehensive test bed.
Preferably, the self-measurement system F comprises a terminal equipment load sensor and a terminal equipment pressure sensor, the calibration measurement system D comprises a calibration system load sensor and a calibration system pressure sensor, a loading cylinder and a tested actuator cylinder are arranged on the actuator cylinder running-in test bed, the loading cylinder is connected with the tested actuator cylinder, the terminal equipment load sensor and the calibration system load sensor are arranged on a connecting pipeline of the loading cylinder and the tested actuator cylinder, and the terminal equipment pressure sensor and the calibration system pressure sensor are arranged on a pipeline of the tested actuator cylinder connected with the main hydraulic system; the loading oil cylinder is connected with a loading hydraulic system.
Preferably, the a parameter and the B parameter are the same parameter in the time domain measurement.
Preferably, the a parameter and the B parameter each include pressure, flow and load.
The test technical scheme of full-working condition simulation and multi-element comparison and the test method of double-system serial connection are adopted. The multi-element comparison is to incorporate all the start/stop and operation conditions of each terminal device of the system into a test environment for combination arrangement, and the system is divided into measurement items (tested parameter items of the terminal device) and influence items (associated terminal devices for exciting signals) according to the test function characteristics of the device, wherein various test combinations are respectively carried out on pressure influence quantity, flow influence quantity and load influence quantity, and the arrangement combination summarizes all the operation conditions of each terminal device, so that the test conditions are tested completely, unnecessarily and comprehensively, and objectivity and comprehensiveness are ensured.
Compared with the related art, the utility model has the beneficial effects that:
1. in the implementation process of the cluster networking of the central hydraulic source and each terminal device, the hydraulic detection system is configured simultaneously, and the hydraulic detection system provides detection of the anti-crosstalk characteristic for each terminal device and detection of the anti-crosstalk characteristic between each terminal device under the unspecified combination condition; the crosstalk resistance of each terminal device can be verified and calibrated, so that the requirements of networking of electrohydraulic systems of a plurality of terminal devices are met, and the important conditions of realizing specific functions of each terminal device are met;
2. the hydraulic detection system aims at testing the anti-crosstalk characteristic of the hydraulic system based on cluster networking, provides a test technical scheme of 'full-working-condition simulation and multi-element comparison' and a test technical method of 'double-system serial connection', fully brings start/stop and operation conditions of a plurality of sets of terminal equipment of networking into a test environment for combination arrangement, and completely, unnecessarily and unnecessarily ensures the objectivity and comprehensiveness of the test working condition.
Drawings
Fig. 1 is a schematic diagram of a hydraulic system of a cluster networking to which the hydraulic detection system provided by the utility model is applied;
FIG. 2 is a schematic diagram of the connection of the self-measuring system E and the calibration measuring system C in the hydraulic integrated test stand;
fig. 3 is a schematic diagram of the connection of the self-measuring system F and the calibration measuring system D in the ram running-in test stand.
Detailed Description
The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.
The hydraulic detection system provided by the embodiment is used in a cluster networking hydraulic system, and comprises a central hydraulic source and a calibration measurement system for measuring parameters of terminal equipment A, wherein the number of the terminal equipment A is multiple, and the terminal equipment A is connected in parallel and simultaneously connected in series with one central hydraulic source. And each terminal device is connected with a self-measuring system for measuring B parameters of the terminal device, and the calibration measuring systems are connected in series with the self-measuring systems in a one-to-one correspondence manner. Therefore, a 'dual-system serial connection' test mode is realized, the self-measurement system of each terminal device and the calibration measurement system simultaneously carry out measurement of the same parameter, the A parameter and the B parameter which are respectively obtained are compared, and the influence degree is judged according to the comparison result, namely the crosstalk amount.
In a specific embodiment, as shown in fig. 1, the hydraulic system of the cluster networking includes 7 terminal devices connected in parallel, and the 7 terminal devices share 1 central hydraulic source. In the figure, the solid arrow represents the oil inlet path, and the imaginary arrow represents the oil return path. Among 7 pieces of terminal equipment, 1-6 pieces of terminal equipment are hydraulic comprehensive test tables, and the hydraulic comprehensive test tables generally consist of a proportional reversing loop, a proportional pressure regulating loop, a proportional flow regulating loop and the like. As shown in fig. 2, each hydraulic test bench is connected with a self-measuring system E, and the self-measuring system E comprises a terminal equipment flowmeter 1.1 and a first stop valve 2.1 which are connected on an oil return path of the hydraulic comprehensive test bench, and further comprises a terminal equipment pressure sensor 3.1 and a second stop valve 2.2 which are connected on an oil inlet path of the hydraulic comprehensive test bench. The calibration measurement system C comprises a calibration system flowmeter 1.2 and a calibration system pressure sensor 3.2, wherein the calibration system flowmeter 1.2 is connected with the calibration system pressure sensor 3.2 and is connected with an oil inlet and an oil return of the hydraulic comprehensive test bed.
Each hydraulic comprehensive test bed is connected with a self-measuring system E and a calibration measuring system C. The B parameters detected by the self-measuring system E are pressure and flow. The a parameters detected by the calibration measurement system C are also pressure and flow. And comparing the A parameter with the B parameter obtained by detection, and judging the influence degree (crosstalk amount) according to the comparison result.
The 7 th terminal equipment is an actuator cylinder running-in test bed, a loading oil cylinder 5.1 and a test actuator cylinder 5.2 are arranged on the actuator cylinder running-in test bed, the loading oil cylinder 5.1 is connected with the tested actuator cylinder 5.2, and the loading oil cylinder 5.1 is used for applying a pulling and pressing load to the tested actuator cylinder 5.2. As shown in fig. 3, the self-measuring system F is disposed on the ram running-in test stand, and the self-measuring system F is connected with the calibration measuring system D.
The self-measuring system F comprises a terminal load sensor 4.1 and a terminal pressure sensor 3.1. The calibration measurement system D comprises a calibration system load sensor 4.2 and a calibration system pressure sensor 3.2. The connecting pipeline of the loading cylinder 5.1 and the tested actuator cylinder 5.2 is provided with a terminal equipment load sensor 4.1 and a calibration system load sensor 4.2. The tested actuator cylinder 5.2 is provided with a terminal equipment pressure sensor 3.1 and a calibration system pressure sensor 3.2 on a pipeline connected with a main hydraulic system (a hydraulic system of a central hydraulic source in fig. 1). The loading oil cylinder 5.1 is connected with a loading hydraulic system. The B parameters detected by the self-measuring system F are load and pressure, and the A parameters detected by the calibrating and measuring system D are also load and pressure. And comparing the A parameter with the B parameter obtained by detection, and judging the influence degree (crosstalk amount) according to the comparison result.
7 terminal devices in the cluster networking are distinguished according to functions of the devices, and A parameters (B parameters) to be measured are pressure, flow and load. The accuracy of these parameters determines the accuracy of the test results. The hydraulic detection system is used for testing the influence degree of simultaneous operation of a plurality of terminal devices on the associated device and testing the crosstalk resistance of the associated device. For example, assuming that the terminal device 1 is performing a performance test of a hydraulic accessory, during which one or several of the other terminal devices 2-7, which are not specific to start/stop, will cross-talk the flow, pressure of the terminal device 1, thereby affecting the accuracy of the performance test performed by the terminal device 1, it is necessary to detect the cross-talk resistance of the associated device.
In order to accurately analyze and accurately test the anti-crosstalk characteristics of the terminal equipment, the hydraulic detection system adopts a test technical scheme of full-working-condition simulation and multi-element comparison and a test method of double-system serial connection.
The full-working-condition simulation and multi-element comparison means that the starting/stopping and running conditions of 7 terminal devices of the system are all brought into a test environment to be combined and arranged, and the system is divided into measurement items (tested parameter items of the terminal devices) and influence items (associated terminal devices for exciting signals) according to the test function characteristics of the devices, 13 kinds of test combinations are performed on pressure influence amounts, 11 kinds of test combinations are performed on flow influence amounts, 2 kinds of test combinations are performed on load influence amounts, and the details are shown in tables 1-3. The arrangement and combination summarize all operation conditions of 7 terminal devices, so that 'should be measured completely, unnecessary and unnecessary', and the objectivity and comprehensiveness of the test conditions are ensured.
The "dual-system serial connection" refers to dividing the monitored and measured parameters into two independent systems according to the test function of 7 terminal devices, wherein one system is a measurement system (self-measurement system) of the terminal device, the other system is an external calibration measurement system (calibration measurement system), and the dual systems are used for parallel measurement and mutually independent. Specific sensors (pressure, flow and load) are embedded aiming at the specific working principle of 7 terminal devices, so that double-system parallel test is realized.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (6)
1. The hydraulic pressure detecting system is used for detecting terminal equipment and is characterized by comprising a central hydraulic pressure source and a calibration measuring system for measuring parameters of the terminal equipment A, wherein the number of the terminal equipment A is multiple, and the terminal equipment A is connected in parallel and simultaneously connected in series with one central hydraulic pressure source; and each terminal device is connected with a self-measuring system for measuring B parameters of the terminal device, and the calibration measuring systems are connected in series with the self-measuring systems in a one-to-one correspondence manner.
2. The hydraulic detection system of claim 1, wherein one of the plurality of terminal devices is a ram break-in test stand and the others are hydraulic integrated test stands; the calibration measurement system comprises a calibration measurement system C and a calibration measurement system D; the self-measuring system comprises a self-measuring system E and a self-measuring system F; each hydraulic comprehensive test bench is provided with a self-measuring system E, the self-measuring systems E are connected with the calibration measuring systems C in a one-to-one correspondence mode, each actuator cylinder running-in test bench is provided with a self-measuring system F, and the self-measuring systems F are connected with the calibration measuring systems D.
3. The hydraulic pressure detection system according to claim 2, wherein the self-measuring system E includes a terminal equipment flowmeter and a stop valve connected to an oil return path of the hydraulic integrated test stand, and further includes a terminal equipment pressure sensor connected to an oil inlet path of the hydraulic integrated test stand; the calibration measurement system C comprises a calibration system flowmeter and a calibration system pressure sensor, and the calibration system flowmeter is connected with the calibration system pressure sensor and is connected with an oil inlet path and an oil return path of the hydraulic comprehensive test bed.
4. The hydraulic detection system according to claim 2, wherein the self-measurement system F comprises a terminal equipment load sensor and a terminal equipment pressure sensor, the calibration measurement system D comprises a calibration system load sensor and a calibration system pressure sensor, a loading cylinder and a tested actuator cylinder are arranged on the actuator cylinder running-in test bench, the loading cylinder is connected with the tested actuator cylinder, the terminal equipment load sensor and the calibration system load sensor are arranged on a connecting pipe of the loading cylinder and the tested actuator cylinder, and the terminal equipment pressure sensor and the calibration system pressure sensor are arranged on a pipe of the tested actuator cylinder connected with the main hydraulic system; the loading oil cylinder is connected with a loading hydraulic system.
5. The hydraulic detection system of claim 1, wherein the a parameter and the B parameter are the same parameter as measured in the same time domain.
6. The hydraulic detection system of claim 2, wherein for a hydraulic integrated test stand, the a and B parameters each include pressure and flow; for the ram break-in test stand, the a and B parameters both include pressure and load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223188276.6U CN218971560U (en) | 2022-11-30 | 2022-11-30 | Hydraulic pressure detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223188276.6U CN218971560U (en) | 2022-11-30 | 2022-11-30 | Hydraulic pressure detecting system |
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| CN218971560U true CN218971560U (en) | 2023-05-05 |
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| CN202223188276.6U Active CN218971560U (en) | 2022-11-30 | 2022-11-30 | Hydraulic pressure detecting system |
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