CN117847054A - Active protection system of hydraulic servo system - Google Patents
Active protection system of hydraulic servo system Download PDFInfo
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- CN117847054A CN117847054A CN202311852264.5A CN202311852264A CN117847054A CN 117847054 A CN117847054 A CN 117847054A CN 202311852264 A CN202311852264 A CN 202311852264A CN 117847054 A CN117847054 A CN 117847054A
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- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims description 9
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- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of protection systems, and particularly provides an active protection system of a hydraulic servo system, which comprises a passive control loop and an active controllable magnetic attraction element, wherein the active control loop can be formed by the active controllable magnetic attraction element and the passive control loop, the active controllable magnetic attraction element is started to activate the passive control loop at the same time, the priority of the active control loop is higher than that of the passive control loop, the active control loop has the function of locking the passive control loop, and the output end of the passive control loop is connected to the hydraulic servo system; according to the invention, the protective enclosure is arranged around the hydraulic servo system, the protective door which can be controlled by the contact switch and the active controllable magnetic attraction element is arranged at one position of the protective enclosure, so that the entry of irrelevant personnel can be effectively prevented, and in the state that the active controllable magnetic attraction element is not attracted, if the irrelevant personnel is wrongly entered, the controller controls the hydraulic servo system to stop working through the oil separator, so that the occurrence of safety accidents is avoided.
Description
Technical Field
The invention belongs to the technical field of protection systems, and particularly relates to an active protection system of a hydraulic servo system.
Background
The hydraulic servo system enables the output quantity of the system, such as displacement, speed or force, to automatically, quickly and accurately follow the change of the input quantity, and simultaneously, the output power is greatly amplified. The hydraulic servo system has been widely used in industrial control with the unique advantages of high response speed, high load stiffness, high control power, etc.
The hydraulic servo system is provided with high-pressure oil in the use process, so that unnecessary safety accidents such as casualties are easily caused if irrelevant personnel enter the working area of the hydraulic servo system by mistake in the working process of the hydraulic servo system. In order to prevent such safety accidents, the common practice of the use departments of the hydraulic servo system is to arrange a safety fence with a warning sign in a working area, and meanwhile, manual monitoring is needed, but various people of the use departments often enter and exit more, the use environment is relatively complex, the reliability of the mode is low, and manpower is wasted.
Disclosure of Invention
Aiming at the defects that in the prior art, the use department of the hydraulic servo system sets a safety fence with a warning sign in a working area and meanwhile monitors the safety fence manually, but various people of the use department often enter and exit more, the use environment is relatively complex, the reliability is low and the manpower is wasted, the invention provides an active protection system of the hydraulic servo system, and aims to solve the technical problems.
The invention provides an active protection system of a hydraulic servo system, which comprises a passive control loop and an active controllable magnetic attraction element, wherein the active control loop can be formed by the active controllable magnetic attraction element and the passive control loop, the active controllable magnetic attraction element is started to activate the passive control loop at the same time, the priority of the active control loop is higher than that of the passive control loop, and the active control loop has the function of locking the passive control loop; the output end of the passive control loop is connected to the hydraulic servo system, the passive control loop can control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element is attracted, and can also independently control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element is attracted to fail.
The technical scheme is further improved, and the passive control loop comprises an oil pressure feedback loop, a switch control loop and a power supply loop for supplying power to the whole active protection system, wherein the switch control loop is electrically connected with the oil pressure feedback loop.
Further improvements in the present solution include an oil pressure feedback loop including a controller, a junction box, a mounting panel, a first switch, and an oil separator;
the low-pressure oil command or the high-pressure oil command output by the controller is output to the signal input end of the oil separator through the junction box, and the controller is connected to the power supply control end of the oil separator through the first button switch, and the signal output end of the oil separator is connected to the oil tank of the hydraulic servo system; the junction box is mounted on the mounting panel, and the first switch is mounted on the junction box.
The technical scheme is further improved, and the switch control loop comprises a BNC adapter, a second switch, a contact switch, a high-low voltage change-over switch and an emergency stop switch;
the BNC adapter is in communication connection with the controller through the junction box, the first end of the BNC adapter is connected to the first end of the emergency stop switch, the second switch and the contact switch are arranged between the second end of the emergency stop switch and the first end of the high-low voltage change-over switch after being connected in parallel, and the second end of the high-low voltage change-over switch is connected to the second end of the BNC adapter.
The technical scheme is further improved, the power supply loop comprises an air switch and a power converter, the input end of the air switch is connected to an external power supply, the output end of the air switch is connected to the input end of the power converter, an oil pressure indicator lamp for indicating an oil pressure state is connected in parallel with the BNC adapter and the oil separator and then arranged between the positive output end and the negative output end of the power converter, and the power converter provides 24V power for the oil pressure indicator lamp, the BNC adapter and the oil separator.
A further improvement of the technical proposal is that the power converter is nested and fixed on the mounting panel.
The active protection system further comprises a protection door, a protection frame and a protection enclosing wall, wherein the protection frame is fixed on the ground around the hydraulic servo system, the protection enclosing wall is arranged on the periphery of the protection frame, an opening is formed in the protection enclosing wall, a sliding rail is arranged on the ground at the opening, and the protection door is in sliding connection with the sliding rail; under the state that the active controllable magnetic attraction element is attracted, the protective door cannot be opened.
Further improvements in this technical scheme are also that the contact switches are all mounted on the guard gate.
According to the technical scheme, the active protection system further comprises a control box, the control box is arranged outside the protection enclosure, the second switch, the high-low voltage change-over switch and the emergency stop switch are arranged in the control box, and other components except the second switch, the contact switch, the high-low voltage change-over switch and the emergency stop switch in the passive control loop are arranged in the protection enclosure.
According to the technical scheme, when the hydraulic system works normally, if the controller receives dynamic change of any one of the contact switch, the high-low voltage change-over switch and the emergency stop switch, the controller outputs a low-pressure oil command to the oil distributor.
The hydraulic servo system has the beneficial effects that the protective fence is arranged around the hydraulic servo system, the protective door which can be controlled by the contact switch and the active controllable magnetic attraction element is arranged at one position of the protective fence, the entry of irrelevant personnel can be effectively prevented, and in the state that the active controllable magnetic attraction element is not attracted, if the irrelevant personnel enter by mistake, the controller controls the hydraulic servo system to stop working through the oil distributor, so that the occurrence of safety accidents is avoided.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of an active protection system.
Fig. 2 is a schematic circuit diagram of a power supply loop.
110 is an active controllable magnetic attraction element, 121 is a controller, 122 is a junction box, 123 is a mounting panel, 124 is a first switch, 125 is an oil distributor, 131 is a BNC adapter, 132 is a second switch, 133 is a contact switch, 134 is a high-low voltage change-over switch, 135 is an emergency stop switch, 141 is an air switch, 142 is a power converter, 143 is an oil pressure indicator, 144 is an oil pressure switch, 145 is an overcurrent protection relay, 151 is a protection door, 152 is a protection frame, and 153 is a protection enclosure.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The following explains key terms appearing in the present invention.
BNC, bayonet Neill-Concelman, neil-Kang Saiman Bayonet, is a very common type of coaxial cable terminator, and BNC adapters must be attached to both ends of each cable segment, consisting of a center pin, an outer sleeve, and a cartridge.
As shown in fig. 1 and 2, the present invention provides an active protection system of a hydraulic servo system, which includes a passive control loop and an active controllable magnetic attraction element 110, wherein the active control loop can be formed by the active controllable magnetic attraction element 110 and the passive control loop, the active controllable magnetic attraction element 110 is started to activate the passive control loop at the same time, and the priority of the active control loop is higher than that of the passive control loop, and the active protection system has the function of locking the passive control loop; the output end of the passive control loop is connected to the hydraulic servo system, and the passive control loop can control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element 110 is attracted and can also independently control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element 110 is attracted and loses efficacy.
The passive control loop comprises an oil pressure feedback loop, a switch control loop and a power supply loop for supplying power to the whole active protection system, and the switch control loop is electrically connected with the oil pressure feedback loop.
Specifically, the oil pressure feedback loop includes a controller 121, a junction box 122, a mounting panel 123, a first switch 124, and an oil separator 125; the controller 121 is also connected to the active controllable magnetic attraction element 110, and the active controllable magnetic attraction element 110 can adopt a contactor or a relay; the low-pressure oil command or the high-pressure oil command output by the controller 121 is output to the signal input end of the oil separator 125 through the junction box 122, and the controller 121 is connected to the power supply control end of the oil separator 125 through the first button switch, and the signal output end of the oil separator 125 is connected to the oil tank of the hydraulic servo system; the junction box 122 is mounted on the mounting panel 123, and the first switch 124 is mounted on the junction box 122. The junction box 122 is connected with the controller 121 through a three-core communication cable.
The switch control loop comprises a BNC adapter 131, a second switch 132, a contact switch 133, a high-low voltage change-over switch 134 and a scram switch 135; the BNC adapter 131 is in communication connection with the controller 121 through the junction box 122, a first end of the BNC adapter 131 is connected to a first end of the emergency stop switch 135, the second switch 132 and the contact switch 133 are arranged between a second end of the emergency stop switch 135 and a first end of the high-low voltage switch 134 after being connected in parallel, and a second end of the high-low voltage switch 134 is connected to a second end of the BNC adapter 131; when the hydraulic system is operating normally, if the controller 121 receives dynamic changes in any of the contact switch 133, the high-low voltage change-over switch 134, and the emergency stop switch 135, the controller 121 outputs a low-pressure oil command to the oil separator 125. The high-low voltage changeover switch 134 is a knob switch having a movable contact operated in the forward direction and having a holding function, and the scram switch 135 is a knob switch having a movable contact and a holding function.
The high-low voltage switch 134 can remotely control the controller 121, when the high-low voltage switch 134 is placed in the OFF gear, the controller 121 cannot work normally, and when the high-low voltage switch 134 is placed in the ON gear, the controller 121 has the precondition of normal work; in addition, when the controller 121 fails to operate normally due to reasons other than the high-low voltage switch 134, the high-low voltage switch 134 also fails to operate normally. In addition, only when the high-low voltage switching switch 134, the emergency stop switch 135 and the contact switch 133 are operated normally, the BNC adapter 131 can be operated normally. In addition, the BNC adapter 131 and the first switch 124 form a constraint relationship, when the BNC adapter 131 functions normally, the first switch 124 can be closed to form a passage, the first switch 124 can control the on/off of the oil separator 125, at this time, if the controller 121 sends a high-pressure oil command to form a high-pressure oil feedback loop, the voltage divider controls the hydraulic servo system to output high-pressure oil, and if the first switch 124 is opened, the precondition of the high-pressure oil feedback loop is not provided, and the hydraulic servo system can only output high-pressure oil.
The power supply loop comprises an air switch 141 and a power converter 142, wherein the input end of the air switch 141 is connected to an external power supply, the output end of the air switch 141 is connected to the input end of the power converter 142, an oil pressure indicator 143 for indicating the oil pressure state is connected in parallel with the BNC adapter 131 and the oil separator 125 and then is arranged between the positive output end and the negative output end of the power converter 142, and the power converter 142 provides 24V power for the oil pressure indicator 143, the BNC adapter 131 and the oil separator 125; wherein the power converter 142 is nested and secured to the mounting panel 123. In order to protect the BNC adapter 131, an overcurrent protection relay 145 is further connected in series between the positive output end of the power converter 142 and the BNC adapter 131; in order to control the operating state of the indicator lamp, an oil pressure switch 144 is also connected in series between the positive output of the power converter 142 and the oil pressure indicator lamp 143.
In addition, the active protection system further comprises a protection door 151, a protection frame 152 and a protection fence 153, wherein the protection frame 152 is fixed on the ground around the hydraulic servo system, the protection fence 153 is arranged on the periphery of the protection frame 152, an opening is formed in the protection fence 153, a sliding rail is arranged on the ground at the opening, and the protection door 151 is in sliding connection with the sliding rail; the active control loop has higher priority than the passive control loop and has the function of locking the passive control loop, and the active controllable magnetic attraction element 110 is in an attraction state, even if the contact switch 133 is triggered in the passive control loop, the protective door 151 can not be opened all the time, so that the entry of irrelevant personnel can be effectively prevented, and safety accidents are avoided; wherein, the material of the protection frame 152 is aluminum alloy, and the protection fence 153 is an acrylic fence.
The contact switch 133 is installed on the protective door 151, when a worker enters the protective enclosure 153 to check the hydraulic system or replace a vehicle part to be tested, the worker needs to disconnect the active controllable magnetic attraction element 110 in a state that the active controllable magnetic attraction element 110 is attracted, place the high-low voltage switch 134 in a low-voltage gear (the high-low voltage switch 134 in fig. 1 is in the high-voltage gear), press the second switch 132, short the contact switch 133, make the contact switch 133 not function, and the worker can only control the protective door 151 to be opened and safely enter the protective enclosure 153; after the worker completes replacement, inspection or maintenance, the protective door 151 needs to be closed, and the second switch 132 is opened, when the protective door 151 is closed to a specified position, the contact switch 133 is closed, the protection is effective, structural durability and road simulation tests can be safely performed, and the active controllable magnetic attraction element 110 is always in an attraction state during the experiments. During the test, if the protective door 151 is suddenly opened due to the nonresistance factor, the contact switch 133 is turned off, the emergency stop switch 135 is triggered, the function of the bnc adapter 131 is abnormal, the controller 121 is abnormal, and the active control loop controls the high oil pressure and the low oil pressure of the hydraulic servo system to be unloaded, so that the test is stopped.
In addition, the active protection system further comprises a control box, the control box is arranged outside the protection enclosure 153, the second switch 132, the high-low voltage switch 134 and the emergency stop switch 135 are arranged in the control box, and other components except the second switch 132, the contact switch 133, the high-low voltage switch 134 and the emergency stop switch 135 in the passive control loop are arranged in the protection enclosure 153.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The active protection system of the hydraulic servo system is characterized by comprising a passive control loop and an active controllable magnetic attraction element, wherein the active control loop can be formed by the active controllable magnetic attraction element and the passive control loop, the active controllable magnetic attraction element is started to activate the passive control loop at the same time, the priority of the active control loop is higher than that of the passive control loop, and the active control loop has the function of locking the passive control loop; the output end of the passive control loop is connected to the hydraulic servo system, the passive control loop can control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element is attracted, and can also independently control the hydraulic servo system to correspondingly test the vehicle parts to be tested when the active controllable magnetic attraction element is attracted to fail.
2. The active protection system of a hydraulic servo system of claim 1, wherein the passive control loop comprises an oil pressure feedback loop, a switch control loop, and a power supply loop that provides power to the entire active protection system, the switch control loop being electrically connected to the oil pressure feedback loop.
3. The active protection system of a hydraulic servo system of claim 2, wherein the oil pressure feedback loop comprises a controller, a junction box, a mounting panel, a first switch, and an oil separator;
the low-pressure oil command or the high-pressure oil command output by the controller is output to the signal input end of the oil separator through the junction box, and the controller is connected to the power supply control end of the oil separator through the first button switch, and the signal output end of the oil separator is connected to the oil tank of the hydraulic servo system; the junction box is mounted on the mounting panel, and the first switch is mounted on the junction box.
4. The active protection system of a hydraulic servo system of claim 3, wherein the switch control loop comprises a BNC adapter, a second switch, a contact switch, a high-low voltage change-over switch, and a scram switch;
the BNC adapter is in communication connection with the controller through the junction box, the first end of the BNC adapter is connected to the first end of the emergency stop switch, the second switch and the contact switch are arranged between the second end of the emergency stop switch and the first end of the high-low voltage change-over switch after being connected in parallel, and the second end of the high-low voltage change-over switch is connected to the second end of the BNC adapter.
5. The active protection system of hydraulic servo system according to claim 4, wherein the power supply loop comprises an air switch and a power converter, wherein an input end of the air switch is connected to an external power supply, an output end of the air switch is connected to an input end of the power converter, an oil pressure indicator for indicating an oil pressure state is connected in parallel with the BNC adapter and the oil separator and then is arranged between an anode output end and a cathode output end of the power converter, and the power converter provides 24V power for the oil pressure indicator, the BNC adapter and the oil separator.
6. The active protection system of a hydraulic servo system of claim 5, wherein the power converter is nested and secured to the mounting panel.
7. The active protection system of the hydraulic servo system according to claim 4, further comprising a protection door, a protection frame and a protection fence, wherein the protection frame is fixed on the ground around the hydraulic servo system, the protection fence is arranged on the periphery of the protection frame, an opening is arranged on the protection fence, a sliding rail is arranged on the ground at the opening, and the protection door is in sliding connection with the sliding rail; under the state that the active controllable magnetic attraction element is attracted, the protective door cannot be opened.
8. The active protection system of a hydraulic servo system of claim 7, wherein the contact switches are each mounted on a protection door.
9. The active protection system of the hydraulic servo system according to claim 7, further comprising a control box, wherein the control box is arranged outside the protection fence, the second switch, the high-low voltage change-over switch and the emergency stop switch are arranged in the control box, and components except the second switch, the contact switch, the high-low voltage change-over switch and the emergency stop switch in the passive control loop are arranged in the protection fence.
10. The active protection system of the hydraulic servo system according to claim 4, wherein the controller outputs a low pressure oil command to the oil separator if the controller receives dynamic changes in any of the contact switch, the high-low pressure change-over switch, and the scram switch during normal operation of the hydraulic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311852264.5A CN117847054A (en) | 2023-12-28 | 2023-12-28 | Active protection system of hydraulic servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311852264.5A CN117847054A (en) | 2023-12-28 | 2023-12-28 | Active protection system of hydraulic servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117847054A true CN117847054A (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311852264.5A Pending CN117847054A (en) | 2023-12-28 | 2023-12-28 | Active protection system of hydraulic servo system |
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| Country | Link |
|---|---|
| CN (1) | CN117847054A (en) |
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2023
- 2023-12-28 CN CN202311852264.5A patent/CN117847054A/en active Pending
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