CN212717439U - Hydraulic control system and working machine - Google Patents
Hydraulic control system and working machine Download PDFInfo
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- CN212717439U CN212717439U CN202021324062.5U CN202021324062U CN212717439U CN 212717439 U CN212717439 U CN 212717439U CN 202021324062 U CN202021324062 U CN 202021324062U CN 212717439 U CN212717439 U CN 212717439U
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Abstract
The utility model provides a hydraulic control system and operation machinery, wherein hydraulic control system includes: a hydraulic actuator; the main oil pump is communicated with the hydraulic actuating element through a main path; the electric control valve is arranged on the main path; the controller is connected with the electric control valve; the auxiliary oil pump is communicated with the main oil pump through a bypass path; the hydraulic control valve is arranged on the bypass path; and the pressure reducing module is arranged on the bypass and is positioned between the auxiliary oil pump and the hydraulic control valve. The utility model provides a hydraulic control system, through the setting of automatically controlled valve, controller and auxiliary oil pump, the pilot operated valve, the decompression module, the discharge capacity of main oil pump can be controlled through automatically controlled or the mode of pilot operated for hydraulic control system can be through the discharge capacity of pilot operated control main oil pump under the circumstances of electroless, outage or controller failure, hydraulic control system still can normal use, the risk of hydraulic control system out of control has been reduced, the security and the reliability of hydraulic control system operation have been improved.
Description
Technical Field
The utility model relates to a hydraulic pressure field particularly, relates to a hydraulic control system and an operation machinery.
Background
In the hydraulic field, the displacement of an oil pump is generally required to be controlled in an electric control mode, and the oil pump cannot work normally under the conditions of failure of an electric control system or no electricity and power failure of equipment, so that accidents are easily caused.
For example, hydraulic pressure is generally used as a power source of a fire fighting truck, because an existing hydraulic system has a risk of being out of control, the fire fighting truck generally needs to be provided with a backup system to improve the reliability of the fire fighting truck in operation, and in order to improve the performance of the fire fighting truck, the working pressure of oil supplied by an oil pump needs to be improved, and the high working pressure correspondingly requires the backup system to be pressurized, which results in increased cost and reduced reliability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, the utility model discloses the first aspect provides a hydraulic control system.
A second aspect of the present invention provides a working machine.
In view of this, according to the utility model discloses a first aspect provides a hydraulic control system, includes: a hydraulic actuator; the outlet of the main oil pump is communicated with the hydraulic actuating element through a main path; the electric control valve is connected with the main oil pump and used for controlling the discharge capacity of the main oil pump; the controller is connected with the electric control valve and is used for controlling the action of the electric control valve; the outlet of the auxiliary oil pump is communicated with the hydraulic actuating element through an auxiliary path; the hydraulic control valve is connected with the main oil pump and used for controlling the discharge capacity of the main oil pump; the outlet of the auxiliary oil pump is also communicated with the hydraulic control valve through a bypass passage and is used for controlling the action of the hydraulic control valve.
The utility model provides a hydraulic control system, in the use, the hydraulic oil of main oil pump output is supplied with to hydraulic actuator, realizes hydraulic drive. Through the setting of automatically controlled valve, controller and auxiliary oil pump, hydraulic control valve, can be through the discharge capacity of automatically controlled or hydraulic control mode control main oil pump for hydraulic control system can be through the discharge capacity of hydraulic control main oil pump under the circumstances of no electricity, outage or controller failure, and hydraulic control system still can normal use, has reduced the hydraulic control system risk of out of control, has improved the security and the reliability of hydraulic control system operation.
The utility model provides a hydraulic control system, under the normal condition of work of hydraulic control system's controller and hydraulic control system power supply, can adopt the discharge capacity of automatically controlled mode control main oil pump through controller and automatically controlled valve, can improve hydraulic control system's response efficiency.
The utility model provides a hydraulic control system, under the controller inefficacy or electroless condition of hydraulic control system, the auxiliary oil pump work, the hydraulic oil of auxiliary oil pump output is delivered to the pilot operated valve through the by-pass, the pilot operated valve can be through the discharge capacity of pilot operated drive signal control main oil pump, the auxiliary oil pump only needs the lower operating pressure of output this moment, make the operation of auxiliary oil pump more reliable, need not to be equipped with the oil pump of high rated power, the investment cost and the installation space of auxiliary oil pump can be reduced.
The utility model provides a hydraulic control system under the condition that the main oil pump damages or became invalid, can open the auxiliary oil pump, and the hydraulic oil of the high pressure state of auxiliary oil pump output passes through the auxiliary road and carries to hydraulic actuator, drives hydraulic actuator and carries out work, makes the utility model provides a hydraulic control system can be under the condition that hydraulic control system is electroless, outage, controller became invalid or the main oil pump damages, and hydraulic control system still can normal use, has reduced the risk of hydraulic control system out of control, has improved the security and the reliability of hydraulic control system operation.
Additionally, the utility model provides an among the above-mentioned technical scheme hydraulic control system can also have following additional technical characteristics:
in the above technical solution, further, the hydraulic control system further includes: and the pressure reducing module is arranged on the bypass and used for adjusting the pressure of the hydraulic oil output to the hydraulic control valve by the auxiliary oil pump.
In the technical scheme, the hydraulic control system further comprises a pressure reducing module arranged on the bypass passage, when the displacement of the main oil pump is controlled through the action of the hydraulic control valve, the auxiliary oil pump is started, hydraulic oil supplied by the auxiliary oil pump is regulated by the pressure reducing module and then is conveyed to the hydraulic control valve as a hydraulic control driving signal, and the hydraulic control valve can control the displacement of the main oil pump through the hydraulic control driving signal. At the moment, the auxiliary oil pump only needs to output lower working pressure, so that the auxiliary oil pump is more reliable in operation, a high rated power oil pump does not need to be equipped, and the investment cost and the installation space of the auxiliary oil pump can be reduced.
In any of the above technical solutions, further, the hydraulic control system further includes: the first reversing valve is arranged on the auxiliary road, and the outlet of the auxiliary oil pump is communicated with the oil inlet valve port of the first reversing valve; the first valve port of the first reversing valve is communicated with the hydraulic execution element through an auxiliary passage, the second valve port of the first reversing valve is communicated with the inlet of the pressure reducing module through a bypass passage, and the outlet of the pressure reducing module is communicated with the hydraulic control valve through the bypass passage.
In this technical solution, the hydraulic control system further includes a first direction valve, and through the arrangement of the first direction valve, the auxiliary oil pump can supply hydraulic oil to the hydraulic actuator through the first valve port and the auxiliary path when the main oil pump is damaged and cannot be used normally. The hydraulic actuating element can work normally, and the operation reliability of the hydraulic control system is further improved; under the condition that the hydraulic control system is in no electricity or power failure or the controller fails but the main oil pump can work normally, the auxiliary oil pump can convey hydraulic oil to the pressure reduction module through the second valve port of the first reversing valve, so that the hydraulic control valve can control the hydraulic control valve.
In this solution, it is further considered that the output power of the main oil pump is generally greater than the output power of the auxiliary oil pump. Therefore, under the condition that the main oil pump can normally work but the electric control of the hydraulic control system fails, the hydraulic oil output by the auxiliary oil pump can be supplied to the bypass path, the hydraulic oil output by the auxiliary oil pump is regulated by the pressure reduction module and then is transmitted to the hydraulic control valve as a hydraulic control driving signal, the hydraulic control valve can control the discharge capacity of the main oil pump through the hydraulic control driving signal, the main oil pump can continuously drive the hydraulic execution element to work, the main oil pump with higher power is selected as a power source of the hydraulic execution element, and the operation reliability of the hydraulic control system can be further improved.
In any of the above technical solutions, further, the first direction valve is a manual valve.
In the technical scheme, the type selection of the first reversing valve is further provided, and the hydraulic oil supply direction of the auxiliary oil pump can still be controlled under the condition that the hydraulic control system is not electrified or powered off through the selection of the manual valve, so that the controllability of the hydraulic control system is stronger, and the running safety and reliability of the hydraulic control system are further improved.
In any of the above technical solutions, further, the hydraulic control system further includes: and the oil inlet valve port of the second reversing valve is communicated with the main path and the auxiliary path, and the execution valve port of the second reversing valve is communicated with the hydraulic execution element, so that the hydraulic oil of the main path and/or the auxiliary path supplies oil to the hydraulic execution element through the second reversing valve.
In the technical scheme, the hydraulic control system further comprises a second reversing valve, and the hydraulic actuating element is communicated with an actuating valve port of the second reversing valve, so that hydraulic oil of the main path and/or the auxiliary path can be supplied to each hydraulic actuating element, and the working efficiency of the hydraulic control system can be improved.
Specifically, the number of the hydraulic actuating elements can be multiple, each hydraulic actuating element is communicated with one actuating valve port of the second reversing valve, and the multiple hydraulic actuating elements can be driven to work through one set of hydraulic control system through the arrangement of the multiple hydraulic actuating elements, so that the working efficiency is improved, the oil circuit arrangement of the hydraulic control system is simplified, and the running reliability of the hydraulic control system is further improved.
In any of the above technical solutions, further, the hydraulic control system further includes: one end of the pressure relief oil way is communicated with the main road and the auxiliary road, the other end of the pressure relief oil way is communicated with the oil tank, and an oil return valve port of the second reversing valve is communicated with the oil tank; and the overflow valve is arranged on the pressure relief oil path.
In the technical scheme, the hydraulic control system further comprises a pressure relief oil path and an overflow valve, and under the condition that the pressure of hydraulic oil of the main path or the auxiliary path is too high, redundant hydraulic oil flows back to the oil tank, so that the working reliability of the hydraulic control system is further improved.
In any of the above technical solutions, further, the hydraulic control system further includes: the first one-way valve is arranged on the main path and positioned between the first reversing valve and the hydraulic actuating element, an inlet of the first one-way valve is communicated with an outlet of the main oil pump, and an outlet of the first one-way valve is communicated with an oil inlet valve port of the second reversing valve. And the second one-way valve is arranged on the auxiliary road and positioned between the main oil pump and the hydraulic actuating element, the inlet of the second one-way valve is communicated with the outlet of the auxiliary oil pump, and the outlet of the second one-way valve is communicated with the oil inlet valve port of the second reversing valve.
In the technical scheme, the first check valve and the second check valve are arranged, so that the reverse flow of hydraulic oil in the main road and the auxiliary road is avoided, and the working reliability of the hydraulic control system is further improved.
In any of the above technical solutions, further, the hydraulic control system further includes: and the hydraulic meter is arranged on the main road and the auxiliary road.
In the technical scheme, the pressure information of the hydraulic oil in the main road and the auxiliary road can be obtained through the setting of the hydraulic pressure meter, and the working state of the hydraulic control system can be monitored conveniently.
According to the utility model discloses a second aspect provides a working machine, include: a support leg; a boom; in the hydraulic control system according to any one of the above technical solutions, the hydraulic actuator of the hydraulic control system is connected to the support leg and/or the arm support to drive the support leg and/or the arm support to extend or retract.
The utility model provides an operating machine, through the setting of the hydraulic control system of any one of the above-mentioned technical scheme, can realize that landing leg and cantilever crane stretch out or withdraw.
The utility model provides an operation machinery, in normal course of the work, can adjust the discharge capacity of main oil pump through the automatically controlled valve of controller control for operation machinery's landing leg and cantilever crane can normally work.
The utility model provides an operation machinery, under the controller inefficacy or electroless, the condition that the main oil pump can normally work, the auxiliary oil pump work, the hydraulic oil of auxiliary oil pump output is transferred to the pilot operated valve as pilot operated drive signal after the decompression module is set, the pilot operated valve can be through the discharge capacity of pilot operated drive signal control main oil pump, realize the emergent of landing leg and cantilever crane and withdraw, the auxiliary oil pump only need export lower operating pressure this moment, the main oil pump still is as the power supply of landing leg and cantilever crane. On the one hand, the auxiliary oil pump is more reliable in operation, an oil pump with high rated power is not required to be equipped, and the investment cost and the installation space of the auxiliary oil pump can be reduced. On the other hand, the main oil pump can output large-flow hydraulic oil, so that the supporting legs and the arm support can be quickly retracted, the response efficiency of the operation machine is improved, and dangerous accidents are avoided.
Specifically, the utility model provides an operating machine, hydraulic control system can also include first switching-over valve, at controller failure or electroless, under the unable normal condition of working of main oil pump, the auxiliary oil pump can supply with hydraulic oil to hydraulic actuator through first switching-over valve and auxiliary road, the auxiliary oil pump is as the power supply of landing leg and cantilever crane, can realize withdrawing of landing leg and cantilever crane, make operating machine can all realize withdrawing of landing leg and cantilever crane under multiple fault condition, can be that fault operating machine withdraws the scene as early as possible, be convenient for follow-up normal operating machine drive in and work, specifically, operating machine can be for the fire engine, can improve fire extinguishing efficiency.
Additionally, the utility model provides an operation machinery among the above-mentioned technical scheme can also have following additional technical characteristics:
in the above technical solution, further, there are two hydraulic actuators, and the two hydraulic actuators are a support leg driving cylinder connected to the support leg and an arm support driving cylinder connected to the arm support.
In the technical scheme, the setting number and the type selection of the hydraulic actuating elements are further provided, the supporting legs and the arm support are respectively connected with one hydraulic actuating element, so that the extending or retracting driving of the supporting legs and the arm support is more reliable, one hydraulic actuating element is a supporting leg driving oil cylinder and is convenient for driving the extending or retracting of the supporting legs, and the other hydraulic actuating element is an arm support driving oil cylinder and is convenient for driving the extending or retracting of the arm support.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural diagram of a hydraulic control system provided according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a working machine according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
2 hydraulic actuating elements, 4 main oil pumps, 6 electric control valves, 8 controllers, 10 auxiliary oil pumps, 12 hydraulic control valves, 14 pressure reducing modules, 16 first reversing valves, 18 second reversing valves, 20 overflow valves, 22 first check valves, 24 second check valves, 26 hydraulic gauges, 28 supporting legs, 30 arm frames, 1602 first valve ports, 1604 second valve ports, 1802 actuating valve ports and 1804 oil return valve ports.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A hydraulic control system and a work machine according to some embodiments of the present disclosure are described below with reference to fig. 1 and 2.
Example one
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
The utility model provides a hydraulic control system, in the use, the hydraulic oil of 4 exports of main oil pump is supplied with to hydraulic actuator 2, realizes hydraulic drive. Through the setting of automatically controlled valve 6, controller 8 and auxiliary oil pump 10, hydraulic control valve 12, can be through the discharge capacity of automatically controlled or hydraulic control mode control main oil pump 4 for hydraulic control system can be through the discharge capacity of hydraulic control main oil pump 4 under the circumstances of electroless, outage or controller 8 inefficacy, and hydraulic control system still can normal use, has reduced the hydraulic control system risk of losing control, has improved the security and the reliability of hydraulic control system operation.
The utility model provides a hydraulic control system, under 8 normal work of controller and the normal condition of hydraulic control system power supply of hydraulic control system, can adopt the discharge capacity of automatically controlled mode control main oil pump 4 through controller 8 and automatically controlled valve 6, can improve hydraulic control system's response efficiency.
The utility model provides a hydraulic control system, under 8 inefficacy or the electroless circumstances of controller at hydraulic control system, the work of auxiliary oil pump 10, the hydraulic oil of auxiliary oil pump 10 output is delivered to hydraulic control valve 12 through the by-pass, hydraulic control valve 12 can be through the discharge capacity of hydraulic control drive signal control main oil pump 4, auxiliary oil pump 10 only needs the lower operating pressure of output this moment, make the operation of auxiliary oil pump 10 more reliable, need not to be equipped with the oil pump of high rated power, the investment cost and the installation space of auxiliary oil pump 10 can have been reduced.
The utility model provides a hydraulic control system under the condition that main oil pump 4 damages or became invalid, can open auxiliary oil pump 10, and the hydraulic oil of the high pressure state of auxiliary oil pump 10 output is carried to hydraulic actuator 2 through the auxiliary road, drives hydraulic actuator 2 and carries out work. Make the utility model provides a hydraulic control system can be under the condition that hydraulic control system does not have electricity, outage, 8 inefficacy of controller or main oil pump 4 damages, and hydraulic control system still can normal use, has reduced the risk of hydraulic control system out of control, has improved the security and the reliability of hydraulic control system operation.
Example two
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
Further, the hydraulic control system further includes: and the pressure reducing module 14 is arranged on the bypass path and used for regulating the pressure of the hydraulic oil output to the hydraulic control valve 12 by the auxiliary oil pump 10.
In this embodiment, a pressure reducing module 14 is further included in the bypass passage, when the displacement of the main oil pump 4 is controlled by the operation of the pilot control valve 12, the pilot oil pump 10 is started, the hydraulic oil supplied by the pilot oil pump 10 is regulated by the pressure reducing module 14 and then delivered to the pilot control valve 12 as a pilot control driving signal, and the pilot control valve 12 can control the displacement of the main oil pump 4 by the pilot control driving signal. At this time, the auxiliary oil pump 10 only needs to output a lower working pressure, so that the auxiliary oil pump 10 operates more reliably, an oil pump with high rated power does not need to be equipped, and the investment cost and the installation space of the auxiliary oil pump 10 can be reduced.
EXAMPLE III
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
Further, the hydraulic control system further includes: and the pressure reducing module 14 is arranged on the bypass path and used for regulating the pressure of the hydraulic oil output to the hydraulic control valve 12 by the auxiliary oil pump 10.
Further, the hydraulic control system further includes: the first reversing valve 16 and the first reversing valve 16 are arranged on the auxiliary path, and the outlet of the auxiliary oil pump 10 is communicated with the oil inlet valve port of the first reversing valve 16. The first valve port 1602 of the first direction valve 16 is connected to the hydraulic actuator 2 through a bypass, the second valve port 1604 of the first direction valve 16 is connected to the inlet of the pressure reducing module 14 through a bypass, and the outlet of the pressure reducing module 14 is connected to the pilot operated valve 12 through a bypass.
In this embodiment, the hydraulic control system further includes a first direction valve 16, and through the arrangement of the first direction valve 16, in the case that the main oil pump 4 is damaged and cannot be used normally, the auxiliary oil pump 10 can supply hydraulic oil to the hydraulic actuator 2 through the first valve port 1602 and the auxiliary path, so that the hydraulic actuator 2 can work normally, and the reliability of the operation of the hydraulic control system is further improved. The hydraulic control system in the case where there is no power, power failure, or controller 8 fails but the main oil pump 4 can operate normally, the auxiliary oil pump 10 can supply hydraulic oil to the pressure reducing module 14 through the second port 1604 of the first direction valve 16, so that the pilot control valve 12 can control.
In this embodiment, further considering that the output power of the main oil pump 4 is usually greater than the output power of the auxiliary oil pump 10, when the main oil pump 4 can normally operate but the electric control of the hydraulic control system fails, the hydraulic oil output by the auxiliary oil pump 10 can be supplied to the bypass path, the hydraulic oil output by the auxiliary oil pump 10 is regulated by the pressure reduction module 14 and then is delivered to the hydraulic control valve 12 as a hydraulic control driving signal, the hydraulic control valve 12 can control the displacement of the main oil pump 4 through the hydraulic control driving signal, so that the main oil pump 4 can continuously drive the hydraulic actuator 2 to operate, and the main oil pump 4 with higher power is selected as the power source of the hydraulic actuator 2, which can further improve the reliability of the operation of the hydraulic control system.
Example four
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
Further, the hydraulic control system further includes: and the pressure reducing module 14 is arranged on the bypass path and used for regulating the pressure of the hydraulic oil output to the hydraulic control valve 12 by the auxiliary oil pump 10.
Further, the hydraulic control system further includes: the first reversing valve 16 and the first reversing valve 16 are arranged on the auxiliary path, and the outlet of the auxiliary oil pump 10 is communicated with the oil inlet valve port of the first reversing valve 16; the first valve port 1602 of the first direction valve 16 is connected to the hydraulic actuator 2 through a bypass, the second valve port 1604 of the first direction valve 16 is connected to the inlet of the pressure reducing module 14 through a bypass, and the outlet of the pressure reducing module 14 is connected to the pilot operated valve 12 through a bypass.
Further, the first direction valve 16 is a manual valve.
In this embodiment, a selection of the first direction valve 16 is further provided, and through the selection of the manual valve, under the condition that the hydraulic control system is not powered or powered off, the hydraulic oil supply direction of the auxiliary oil pump 10 can still be controlled, so that the controllability of the hydraulic control system is stronger, and the safety and reliability of the operation of the hydraulic control system are further improved.
EXAMPLE five
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
Further, the hydraulic control system further includes: and the pressure reducing module 14 is arranged on the bypass path and used for regulating the pressure of the hydraulic oil output to the hydraulic control valve 12 by the auxiliary oil pump 10.
Further, the hydraulic control system further includes: the first reversing valve 16 and the first reversing valve 16 are arranged on the auxiliary path, and the outlet of the auxiliary oil pump 10 is communicated with the oil inlet valve port of the first reversing valve 16; the first valve port 1602 of the first direction valve 16 is connected to the hydraulic actuator 2 through a bypass, the second valve port 1604 of the first direction valve 16 is connected to the inlet of the pressure reducing module 14 through a bypass, and the outlet of the pressure reducing module 14 is connected to the pilot operated valve 12 through a bypass.
Further, the first direction valve 16 is a manual valve.
Further, the hydraulic control system further includes: and the oil inlet valve port of the second reversing valve 18 is communicated with the main path and the auxiliary path, and the execution valve port 1802 of the second reversing valve 18 is communicated with the hydraulic execution element 2, so that the hydraulic oil of the main path and/or the auxiliary path can be supplied to the hydraulic execution element 2 through the second reversing valve 18.
In this embodiment, a second direction-changing valve 18 is further included, and the hydraulic actuators 2 are communicated with the actuator valve ports 1802 of the second direction-changing valve 18, so that hydraulic oil of the main path and/or the auxiliary path can be supplied to each hydraulic actuator 2, and the working efficiency of the hydraulic control system can be improved.
Specifically, the number of the hydraulic actuators 2 may be multiple, each hydraulic actuator 2 is communicated with one actuator valve port 1802 of the second directional valve 18, and through the arrangement of the multiple hydraulic actuators 2, the multiple hydraulic actuators 2 can be driven to work by one hydraulic control system, so that the working efficiency is improved, the oil circuit arrangement of the hydraulic control system is simplified, and the reliability of the operation of the hydraulic control system is further improved.
EXAMPLE six
As shown in fig. 1, an embodiment of the present invention provides a hydraulic control system, including: the hydraulic control system comprises a hydraulic execution element 2, a main oil pump 4, an electric control valve 6, a controller 8, an auxiliary oil pump 10 and a hydraulic control valve 12.
Wherein, the outlet of the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is connected with the main oil pump 4 and is used for controlling the displacement of the main oil pump 4; the controller 8 is connected with the electric control valve 6, and the controller 8 is used for controlling the action of the electric control valve 6; the outlet of the auxiliary oil pump 10 is communicated with the hydraulic actuator 2 through an auxiliary passage; a pilot control valve 12 is connected to the main oil pump 4 for controlling the displacement of the main oil pump 4.
The outlet of the auxiliary oil pump 10 is also communicated with the pilot control valve 12 through a bypass passage, and is used for controlling the operation of the pilot control valve 12.
Further, the hydraulic control system further includes: and the pressure reducing module 14 is arranged on the bypass path and used for regulating the pressure of the hydraulic oil output to the hydraulic control valve 12 by the auxiliary oil pump 10.
Further, the hydraulic control system further includes: the first reversing valve 16 and the first reversing valve 16 are arranged on the auxiliary path, and the outlet of the auxiliary oil pump 10 is communicated with the oil inlet valve port of the first reversing valve 16; the first valve port 1602 of the first direction valve 16 is connected to the hydraulic actuator 2 through a bypass, the second valve port 1604 of the first direction valve 16 is connected to the inlet of the pressure reducing module 14 through a bypass, and the outlet of the pressure reducing module 14 is connected to the pilot operated valve 12 through a bypass.
Further, the first direction valve 16 is a manual valve.
Further, the hydraulic control system further includes: and the oil inlet valve port of the second reversing valve 18 is communicated with the main path and the auxiliary path, and the execution valve port 1802 of the second reversing valve 18 is communicated with the hydraulic execution element 2, so that the hydraulic oil of the main path and/or the auxiliary path can be supplied to the hydraulic execution element 2 through the second reversing valve 18.
Further, the hydraulic control system further includes: one end of the pressure relief oil path is communicated with the main path and the auxiliary path, the other end of the pressure relief oil path is communicated with the oil tank, and an oil return valve port 1804 of the second reversing valve 18 is communicated with the oil tank; and a relief valve 20, the relief valve 20 being provided on the relief oil path.
In this embodiment, a pressure relief oil path and an overflow valve 20 are further included, so that in the case that the pressure of the hydraulic oil in the main path or the auxiliary path is too high, the redundant hydraulic oil flows back to the oil tank, and the reliability of the operation of the hydraulic control system is further improved.
EXAMPLE seven
As shown in fig. 1, on the basis of any one of the second embodiment to the sixth embodiment, the hydraulic control system further includes: the first check valve 22 is arranged on the main path and positioned between the first reversing valve 16 and the hydraulic actuating element 2, an inlet of the first check valve 22 is communicated with an outlet of the main oil pump 4, and an outlet of the first check valve 22 is communicated with an oil inlet valve port of the second reversing valve 18; and the second one-way valve 24 is arranged on the auxiliary path and positioned between the main oil pump 4 and the hydraulic actuating element 2, an inlet of the second one-way valve 24 is communicated with an outlet of the auxiliary oil pump 10, and an outlet of the second one-way valve 24 is communicated with an oil inlet valve port of the second reversing valve 18.
In the technical scheme, the first check valve 22 and the second check valve 24 are arranged, so that the hydraulic oil in the main road and the hydraulic oil in the auxiliary road are prevented from flowing reversely, and the working reliability of the hydraulic control system is further improved.
Example eight
As shown in fig. 1, on the basis of any one of the second embodiment to the sixth embodiment, the hydraulic control system further includes: and the hydraulic gauge 26 is arranged on the main road and the auxiliary road.
In the technical scheme, the pressure information of the hydraulic oil in the main road and the auxiliary road can be obtained through the arrangement of the hydraulic pressure meter 26, so that the working state of the hydraulic control system can be monitored conveniently.
Example nine
As shown in fig. 2, an embodiment of the present invention provides a work machine, including: legs 28; a boom 30; in the hydraulic control system according to any one of the above technical solutions, the hydraulic actuator 2 of the hydraulic control system is connected to the support leg 28 and/or the arm support 30 to drive the support leg 28 and/or the arm support 30 to extend or retract.
The utility model provides an operating machine, through the setting of the hydraulic control system of any one of above-mentioned technical scheme, can realize that landing leg 28 and cantilever crane 30 stretch out or withdraw.
The utility model provides an operation machinery, in normal course of work, can adjust the discharge capacity of main oil pump 4 through 8 control electric control valves 6 of controller for operation machinery's landing leg 28 and cantilever crane 30 can normally work.
The utility model provides an operating machine, at controller 8 inefficacy or electroless, under the condition that main oil pump 4 can normally work, auxiliary oil pump 10 work, the hydraulic oil of auxiliary oil pump 10 output is transferred to hydraulic control valve 12 as hydraulic control drive signal after 14 setups of decompression module, hydraulic control valve 12 can be through the discharge capacity of hydraulic control drive signal control main oil pump 4, realize the emergent of landing leg 28 and cantilever crane 30 and withdraw, auxiliary oil pump 10 only needs to export lower operating pressure this moment, main oil pump 4 still is as the power supply of landing leg 28 and cantilever crane 30, make the operation of auxiliary oil pump 10 more reliable on the one hand, need not to be equipped with the oil pump of high rated power, the investment cost and the installation space of auxiliary oil pump 10 can be reduced; on the other hand, the main oil pump 4 can output large-flow hydraulic oil, so that the supporting legs 28 and the arm support 30 can be quickly retracted, the response efficiency of the working machine is improved, and dangerous accidents are avoided.
Specifically, the utility model provides an operating machine, hydraulic control system can also include first switching-over valve 16, at controller 8 inefficacy or electroless, under the unable normal operating condition of main oil pump 4, auxiliary oil pump 10 can supply with hydraulic oil to hydraulic actuator 2 through first switching-over valve 16 and auxiliary road, auxiliary oil pump 10 is as landing leg 28 and cantilever crane 30's power supply, can realize withdrawing of landing leg 28 and cantilever crane 30, make operating machine can all realize withdrawing of landing leg 28 and cantilever crane 30 under multiple fault condition, can be that fault operating machine withdraws the scene as early as possible, be convenient for following normal operating machine drive into and work, specifically, operating machine can be the fire engine, can improve the efficiency of putting out a fire.
Example ten
As shown in fig. 2, an embodiment of the present invention provides a work machine, including: the method comprises the following steps: legs 28; a boom 30; in the hydraulic control system according to any one of the above technical solutions, the hydraulic actuator 2 of the hydraulic control system is connected to the support leg 28 and/or the arm support 30 to drive the support leg 28 and/or the arm support 30 to extend or retract.
Further, there are two hydraulic actuators 2, and the two hydraulic actuators 2 are a support leg driving cylinder connected to the support leg 28 and a boom driving cylinder connected to the boom 30, respectively.
In this embodiment, the number and the types of the hydraulic actuators 2 are further provided, the support legs 28 and the arm support 30 are respectively connected to one hydraulic actuator 2, so that the extension or retraction driving of the support legs 28 and the arm support 30 is more reliable, one hydraulic actuator 2 is a support leg driving cylinder and is convenient for driving the extension or retraction of the support legs 28, and the other hydraulic actuator is an arm support driving cylinder and is convenient for driving the extension or retraction of the arm support 30.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 1 and 2, the present embodiment provides a work machine including: the support leg 28, the arm support 30, the hydraulic control system of any one of the embodiments.
Wherein, the hydraulic actuator 2 of the hydraulic control system is connected to the support leg 28 and the arm support 30 to drive the support leg 28 and the arm support 30 to extend or retract.
Wherein, hydraulic control system includes: the hydraulic control system comprises a hydraulic actuator 2, a main oil pump 4, an electronic control valve 6, a controller 8, an auxiliary oil pump 10, a pilot control valve 12 and a pressure reducing module 14.
Wherein, the main oil pump 4 is communicated with the hydraulic actuator 2 through a main path; the electric control valve 6 is arranged on the main path; the controller 8 is connected to the electric control valve 6, and the controller 8 is used for controlling the displacement of the main oil pump 4 through the electric control valve 6; the auxiliary oil pump 10 is communicated with the main oil pump 4 through a bypass path; the hydraulic control valve 12 is arranged on the bypass path; the pressure reducing module 14 is disposed on the bypass path between the auxiliary oil pump 10 and the pilot control valve 12, and the hydraulic oil supplied by the auxiliary oil pump 10 passes through the pressure reducing module 14 and then controls the displacement of the main oil pump 4 through the pilot control valve 12.
Further, the hydraulic control system further includes: the auxiliary oil pump 10 is communicated with an oil inlet valve port of the first reversing valve 16; the first port 1602 of the first direction valve 16 communicates with the hydraulic actuator 2 through a bypass so that the auxiliary oil pump 10 can drive the hydraulic actuator 2. The second port 1604 of the first direction valve 16 communicates with the decompression block 14 through a bypass path so that the hydraulic oil of the auxiliary oil pump 10 is supplied to the decompression block 14.
In the working machine provided by the embodiment, the auxiliary oil pump 10 can directly drive the arm support 30 and the supporting leg 28 to recover, and can also control the main oil pump 4 to still provide a large-flow oil source in a non-electric state, so that rapid emergency recovery is realized, and the energy is saved and the working machine is more reliable. Meanwhile, the contradiction between limited installation and arrangement space and large emergency power oil source is solved.
The hydraulic control system of the embodiment works according to the following principle:
when the main oil pump 4 works normally, the auxiliary oil pump 10 does not work, as shown in fig. 1, the first reversing valve 16 is selected to be in the left position in an emergency, the first reversing valve 16 does not work, and the main oil pump 4 receives an electric signal given by the controller 8 and controls the displacement through the electric control valve 6.
When emergency operation is needed, corresponding emergency operation can be carried out according to the occurring fault mode:
1. the main oil pump 4 is normal but without power, and the main oil pump 4 cannot obtain an electric signal. The first reversing valve 16 is switched to the right position in the emergency mode, the auxiliary oil pump 10 works, the output hydraulic oil is adjusted by the pressure reducing module 14 and then is input into the hydraulic control valve 12 as a control signal, the control of the displacement of the main oil pump 4 is realized by adjusting the set pressure of the pressure reducing module 14, and therefore the emergency quick recovery operation is completed, and at the moment, the auxiliary oil pump 10 only needs to output lower working pressure, so that the auxiliary oil pump works in a low-pressure state and is more reliable.
2. When the main oil pump 4 is damaged or the chassis engine of the working machine is damaged, so that the main oil pump 4 does not have power input, the first reversing valve 16 is selected to be in the default left position in the emergency mode, and the auxiliary oil pump 10 drives the recovery of the supporting legs 28 and the arm support 30 through the auxiliary road.
The working machine provided by the embodiment has the following beneficial effects:
1. the main oil pump 4 can be electrically controlled and hydraulically controlled, and meets the intelligent trend;
2. when the circuit is in fault but the main oil pump 4 can still work normally, the auxiliary oil pump 10 provides required control oil for the main oil pump 4 by switching oil paths, so that the main oil pump 4 outputs large flow to realize quick emergency recovery. The auxiliary oil pump 10 works under the working conditions of low pressure and low power, has longer service life, is reliable and saves gasoline;
3. a low-power oil pump can be selected as the auxiliary oil pump 10, a high-pressure plunger pump with high investment cost is not required, and the installation space required by the auxiliary oil pump 10 is reduced while the support legs 28 and the arm support 30 can be rapidly and emergently recovered;
4. the main oil pump 4 and the circuit are failed, and auxiliary oil can be used as a power source of the working machine, so that the supporting legs 28 and the arm support 30 can be normally recovered.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hydraulic control system, comprising:
a hydraulic actuator;
the outlet of the main oil pump is communicated with the hydraulic actuator through a main path;
the electric control valve is connected with the main oil pump and used for controlling the discharge capacity of the main oil pump;
the controller is connected with the electric control valve and is used for controlling the action of the electric control valve;
the outlet of the auxiliary oil pump is communicated with the hydraulic actuator through an auxiliary path;
the hydraulic control valve is connected with the main oil pump and used for controlling the discharge capacity of the main oil pump;
and the outlet of the auxiliary oil pump is also communicated with the hydraulic control valve through a bypass passage and is used for controlling the action of the hydraulic control valve.
2. The hydraulic control system of claim 1, further comprising:
and the pressure reducing module is arranged on the bypass and used for adjusting the pressure of the hydraulic oil output to the hydraulic control valve by the auxiliary oil pump.
3. The hydraulic control system of claim 2, further comprising:
the first reversing valve is arranged on the auxiliary path, and an outlet of the auxiliary oil pump is communicated with an oil inlet valve port of the first reversing valve;
the first valve port of the first reversing valve is communicated with the hydraulic actuating element through an auxiliary passage, the second valve port of the first reversing valve is communicated with the inlet of the pressure reducing module through the bypass passage, and the outlet of the pressure reducing module is communicated with the hydraulic control valve through the bypass passage.
4. The hydraulic control system of claim 3,
the first reversing valve is a manual valve.
5. The hydraulic control system of claim 4, further comprising:
and the oil inlet valve port of the second reversing valve is communicated with the main path and the auxiliary path, and the execution valve port of the second reversing valve is communicated with the hydraulic execution element, so that the hydraulic oil of the main path and/or the auxiliary path supplies oil to the hydraulic execution element through the second reversing valve.
6. The hydraulic control system of claim 5, further comprising:
one end of the pressure relief oil way is communicated with the main path and the auxiliary path, the other end of the pressure relief oil way is communicated with an oil tank, and an oil return valve port of the second reversing valve is communicated with the oil tank;
the overflow valve is arranged on the pressure relief oil path.
7. The hydraulic control system of claim 5, further comprising:
the first check valve is arranged on the main path and positioned between the first reversing valve and the hydraulic actuating element, an inlet of the first check valve is communicated with an outlet of the main oil pump, and an outlet of the first check valve is communicated with an oil inlet valve port of the second reversing valve;
and the second one-way valve is arranged on the auxiliary path and positioned between the main oil pump and the hydraulic actuating element, an inlet of the second one-way valve is communicated with an outlet of the auxiliary oil pump, and an outlet of the second one-way valve is communicated with an oil inlet valve port of the second reversing valve.
8. The hydraulic control system according to any one of claims 2 to 6, characterized by further comprising:
and the hydraulic meter is arranged on the main road and the auxiliary road.
9. A work machine, comprising:
a support leg;
a boom;
the hydraulic control system of any one of claims 1 to 8, wherein a hydraulic actuator of the hydraulic control system is connected to the support leg and/or the boom to drive the support leg and/or the boom to extend or retract.
10. The work machine of claim 9,
the hydraulic actuator comprises two hydraulic actuators, and the two hydraulic actuators are a supporting leg driving oil cylinder connected to the supporting leg and an arm support driving oil cylinder connected to the arm support respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021324062.5U CN212717439U (en) | 2020-07-08 | 2020-07-08 | Hydraulic control system and working machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021324062.5U CN212717439U (en) | 2020-07-08 | 2020-07-08 | Hydraulic control system and working machine |
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| CN212717439U true CN212717439U (en) | 2021-03-16 |
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| CN202021324062.5U Active CN212717439U (en) | 2020-07-08 | 2020-07-08 | Hydraulic control system and working machine |
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| Country | Link |
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| CN (1) | CN212717439U (en) |
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