CN112145501A - Control device, control system and control method for pressure of hydraulic cylinder - Google Patents
Control device, control system and control method for pressure of hydraulic cylinder Download PDFInfo
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- CN112145501A CN112145501A CN202011163830.8A CN202011163830A CN112145501A CN 112145501 A CN112145501 A CN 112145501A CN 202011163830 A CN202011163830 A CN 202011163830A CN 112145501 A CN112145501 A CN 112145501A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The application provides a control device, a control system and a control method for hydraulic cylinder pressure, wherein the control device comprises: a pressure regulating device and a first pressure sensor; the pressure adjusting device is arranged on a pipeline between an oil inlet path and/or an oil outlet path of an oil conveying link of the equipment to be adjusted and an oil tank of the equipment to be adjusted; and the first pressure sensor is arranged on a pipeline between the oil inlet of the pressure regulating device and the oil conveying link. Therefore, the oil supply pressure of the hydraulic cylinder in the oil delivery link can be acquired through the first pressure sensor, and the oil supply pressure of the hydraulic cylinder in the oil delivery link is adjusted through the pressure adjusting device arranged between the oil inlet path and/or the oil outlet path of the oil delivery link of the equipment to be adjusted and the oil tank of the equipment to be adjusted, so that the real-time adjustment of the oil supply pressure of the hydraulic cylinder in the oil delivery link is realized, the instantaneous rise of the oil supply pressure in the hydraulic cylinder can be avoided, and the situation that the reel of the engineering machinery stalls is favorably prevented.
Description
Technical Field
The present disclosure relates to hydraulic control technologies, and in particular, to a control device, a control system, and a control method for controlling a hydraulic cylinder.
Background
In the engineering machinery, a corresponding hydraulic cylinder is usually arranged for each working part, for example, when a grab bucket of an excavator is used, when the grab bucket is rapidly controlled by an operating handle to perform corresponding bucket opening or bucket closing actions, the oil supply pressure of the grab bucket hydraulic cylinder can be instantly increased, so that a pipeline in an oil delivery link is instantly contracted, the damage of the pipeline in the oil delivery link is accelerated, and the reel of the engineering machinery can be stalled seriously, thereby causing unnecessary property loss.
Therefore, how to adjust the oil supply pressure of the hydraulic cylinder in the oil transportation link to ensure the personal safety of the operating personnel in the operating process becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a control device, a control system and a control method for controlling the pressure of a hydraulic cylinder, which can adjust the oil supply pressure of the hydraulic cylinder in an oil delivery link, avoid the instantaneous increase of the oil supply pressure in the hydraulic cylinder, and help to prevent the reel of a construction machine from stalling.
The embodiment of the application provides a controlling means of pneumatic cylinder pressure, controlling means includes: a pressure regulating device and a first pressure sensor;
the pressure adjusting device is arranged on a pipeline between an oil inlet path and/or an oil outlet path of an oil conveying link of the equipment to be adjusted and an oil tank of the equipment to be adjusted; the first pressure sensor is arranged on a pipeline between the oil inlet of the pressure adjusting device and the oil conveying link;
the pressure adjusting device acquires the oil supply pressure of the hydraulic cylinder through the first pressure sensor.
Further, the pressure regulating device comprises a compensation valve and at least one pressure relief combination valve;
the compensation valve is arranged on a pipeline between an oil inlet of the pressure regulating device and an oil leakage port of the pressure regulating device, and each pressure relief combined valve is arranged on any pipeline between the compensation valve and the oil leakage port of the pressure regulating device.
Further, the control device further comprises a hydraulic bridge;
and the hydraulic bridge is arranged on a pipeline between the oil inlet of the pressure regulating device and the oil inlet path and/or the oil outlet path of the oil transportation link.
Further, when the oil inlet of the pressure regulating device is respectively connected with the oil inlet path and the oil outlet path of the oil transportation link, the hydraulic bridge comprises a first check valve and a second check valve;
the first check valve is arranged on a pipeline between an oil inlet of the pressure regulating device and an oil inlet path of the oil transportation link, and the second check valve is arranged on a pipeline between the oil inlet of the pressure regulating device and an oil outlet path of the oil transportation link.
Further, when the oil inlet of the pressure regulating device is connected with the oil inlet path or the oil outlet path of the oil transportation link, the hydraulic bridge comprises a third one-way valve;
the third check valve is arranged on a pipeline between the oil inlet of the pressure regulating device and the oil inlet path or the oil outlet path of the oil transportation link.
Further, the oil delivery link comprises a hydraulic cylinder, a hydraulic control reversing valve and a hydraulic pump;
the first output end of the hydraulic cylinder is connected with the oil port A of the hydraulic control reversing valve through a first oil path, the second output end of the hydraulic cylinder is connected with the oil port B of the hydraulic control reversing valve through a second oil path, when the first oil path is the oil inlet path, the second oil path is the oil outlet path, and when the first oil path is the oil outlet path, the second oil path is the oil inlet path;
the oil port P of the hydraulic control reversing valve is connected with the oil pressing end of the hydraulic pump, and the oil port T of the hydraulic control reversing valve is connected with the oil tank through a connecting pipe.
Further, the control device further comprises a shuttle valve and a second pressure sensor;
the shuttle valve is arranged between the operating handle of the equipment to be regulated and the hydraulic control reversing valve;
the second pressure sensor is arranged on the shuttle valve and used for collecting the pressure value of the operating handle.
Further, the pressure relief combination valve comprises a switch valve and an overflow valve;
the switch valve is arranged on a pipeline between an input port of the pressure relief combined valve and an output port of the pressure relief combined valve; the overflow valve is arranged on a pipeline between the switch valve and the output port of the pressure relief combined valve;
and when the switch valve is conducted, the overflow valve is conducted to reduce the oil supply pressure in the oil transmission link.
Further, the pressure relief combination valve comprises an electric proportional overflow valve;
the electric proportional overflow valve is arranged on a pipeline between an input port of the pressure relief combined valve and an output port of the pressure relief combined valve;
the electric proportional overflow valve is used for conducting according to a preset opening proportion, and oil supply pressure in the oil conveying link is reduced.
The embodiment of the application also provides a control system of the pressure of the hydraulic cylinder, and the control system comprises any one of the control device of the pressure of the hydraulic cylinder, an operating handle, an oil delivery link and a main control module;
when a first pressure sensor in the control device acquires the pressure value of the oil supply pressure of the hydraulic cylinder and/or a second pressure sensor acquires the pressure value of the pilot pressure of the operating handle, the main control module controls a corresponding pressure relief combined valve in a pressure adjusting device of the control device to work.
The embodiment of the application also provides a control method of the pressure of the hydraulic cylinder, which is applied to the control device and comprises the following steps;
when a first pressure sensor and/or a second pressure sensor in the control device detect/detects a pressure value, generating a corresponding working instruction;
and controlling a corresponding pressure relief combined valve in a pressure regulating device of the control device to work through the main control module according to the working instruction, so as to reduce the oil supply pressure of a hydraulic cylinder in an oil conveying link.
The embodiment of the application provides a control device, a control system and a control method for hydraulic cylinder pressure, wherein the control device comprises: a pressure regulating device and a first pressure sensor; the pressure adjusting device is arranged on a pipeline between an oil inlet path and/or an oil outlet path of an oil conveying link of the equipment to be adjusted and an oil tank of the equipment to be adjusted; the first pressure sensor is arranged on a pipeline between the oil inlet of the pressure adjusting device and the oil conveying link; the pressure adjusting device acquires the oil supply pressure of the hydraulic cylinder through the first pressure sensor.
Like this, this application can gather the fuel feeding pressure of pneumatic cylinder in the oil transportation link through first pressure sensor to when the fuel feeding pressure of pneumatic cylinder in the oil transportation link was gathered to first pressure sensor, through set up in the oil feed way and/or the oil outlet way of the oil transportation link of treating the adjusting device with treat the pressure regulating device between the oil tank of adjusting device, adjust the fuel feeding pressure of pneumatic cylinder in the oil transportation link, and then, realize the real-time regulation to the fuel feeding pressure of pneumatic cylinder in the oil transportation link, can avoid the fuel feeding pressure in the pneumatic cylinder to rise in the twinkling of an eye, help preventing engineering machine's reel from taking place the condition of stall.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a system for controlling pressure of a hydraulic cylinder according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of the control device shown in FIG. 1;
FIG. 3 is a second schematic structural diagram of the control device shown in FIG. 1;
FIG. 4 is a third schematic structural diagram of the control device shown in FIG. 1;
FIG. 5 is a fourth schematic structural view of the control device shown in FIG. 1;
FIG. 6 is a fifth schematic view of the control device shown in FIG. 1;
FIG. 7 is a schematic diagram of one of the pressure relief combination valves shown in FIG. 2;
FIG. 8 is a second schematic diagram of the pressure relief assembly valve shown in FIG. 2;
fig. 9 is a flowchart of a method for controlling a pressure of a hydraulic cylinder according to an embodiment of the present application.
Icon: 100-a control system; 110-a control device; 111-pressure regulating means; 1111-a compensation valve; 1112-a combination pressure relief valve; 1112 a-a switch valve; 1112 b-relief valve; 1112 c-electric proportional relief valve; 112-a first pressure sensor; 113-a hydraulic bridge; 1131 — a first one-way valve; 1132 — a second one-way valve; 1133-a third one-way valve; 114-a shuttle valve; 115-a second pressure sensor; 120-operating handle; 130-oil transportation link; 131-a hydraulic cylinder; 132-a pilot operated directional control valve; 133-hydraulic pump; 140-master control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. Every other embodiment that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present application falls within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in this application are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions referred to as "first", "second", etc. in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
First, an application scenario to which the present application is applicable will be described. The application can be applied to the technical field of hydraulic control. The control device comprises a pressure adjusting device and a first pressure sensor, the pressure adjusting device is arranged on a pipeline between an oil inlet path and/or an oil outlet path of an oil conveying link of the equipment to be adjusted and an oil tank of the equipment to be adjusted, the first pressure sensor is arranged on a pipeline between an oil inlet of the pressure adjusting device and the oil conveying link, the first pressure sensor is used for collecting oil supply pressure of the hydraulic cylinder, and when the collected oil supply pressure value is larger than a preset pressure threshold value, the control device adjusts the oil supply pressure of the hydraulic cylinder.
According to research, a corresponding hydraulic cylinder is usually arranged for each working part in the engineering machinery, for example, when a grab bucket of an excavator is used, when the grab bucket is controlled by an operating handle to perform corresponding bucket opening or bucket closing actions, the oil supply pressure of the hydraulic cylinder of the grab bucket can be instantly increased, so that a pipeline in an oil delivery link is instantly contracted, the damage of the pipeline in the oil delivery link is accelerated, and a reel of the engineering machinery can be stalled in serious conditions, so that unnecessary property loss is caused.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a control system for controlling a pressure of a hydraulic cylinder according to an embodiment of the present disclosure. As shown in fig. 1, a control system 100 provided in an embodiment of the present application includes: control device 110, operating handle 120, oil delivery link 130, and master control module 140.
The control device 110 may collect a pressure value of the operating handle 120 and an oil supply pressure value in the oil delivery link 130, and meanwhile, when the control device 110 collects the pressure value of the operating handle 120 and/or the oil supply pressure value in the oil delivery link 130, the main control module 140 controls the control device 110 to adjust the oil supply pressure in the oil delivery link 130.
The main control module 140 is disposed on the device to be adjusted, and specifically, may be disposed in a control center of the device to be adjusted, or may be disposed separately from the control center of the device to be adjusted, where the specific disposition manner is determined according to circumstances.
Further, as shown in fig. 2, fig. 2 is a schematic structural diagram of the control device 110 shown in fig. 1. The control device 110 includes therein a pressure regulating device 111 and a first pressure sensor 112.
As shown in fig. 2, the pressure regulating device 111 is disposed on a pipeline between an oil inlet path or an oil outlet path of the oil delivery link 130 of the equipment to be regulated and the oil tank of the equipment to be regulated, that is, there is a pipeline between the oil inlet path or the oil outlet path of the oil delivery link 130 and the oil tank, and the pressure regulating device 111 is disposed in the pipeline for regulating the oil supply pressure in the oil delivery link 130.
In addition, as shown in fig. 3, fig. 3 is a second schematic structural diagram of the control device 110 shown in fig. 1. The control device 110 includes two pressure adjusting devices 111 therein, each pressure adjusting device 111 is respectively disposed on a pipeline between an oil inlet path and an oil outlet path of the oil transportation link 130 of the device to be adjusted and an oil tank of the device to be adjusted, that is, two pipelines exist between the oil inlet path or the oil outlet path of the oil transportation link 130 and the oil tank, and the pressure adjusting device 111 is disposed in the pipeline and is used for adjusting the oil supply pressure in the oil transportation link 130.
The first pressure sensor 112 is disposed on a pipeline between the oil inlet of the pressure regulating device 111 and the oil delivery link 130. The first pressure sensor 112 is used to collect the supply pressure of the hydraulic cylinder 131 in the oil delivery link 130.
If a plurality of pipelines exist between the oil inlet of the pressure adjusting device 111 and the oil transportation link 130, the first pressure sensor 112 may be disposed on any pipeline.
When the first pressure sensor 112 detects the oil supply pressure of the hydraulic cylinder 131 in the oil delivery link 130, it is determined that the hydraulic cylinder 131 has the extending/contracting action, and at this time, the control device 110 is required to adjust the oil supply pressure of the hydraulic cylinder 131.
Further, as shown in fig. 2, the pressure regulating device 111 includes a compensation valve 1111 and at least one combined pressure relief valve 1112, the compensation valve 1111 is disposed on a pipeline between an oil inlet of the pressure regulating device 111 and an oil leakage port of the pressure regulating device 111, and each combined pressure relief valve 1112 is disposed on any pipeline between the compensation valve 1111 and the oil leakage port of the pressure regulating device 111.
The oil is introduced into the oil return tank through a pipe between the oil leakage port of the pressure adjusting device 111 and the oil tank (not shown).
Further, as shown in fig. 4, fig. 4 is a third schematic structural diagram of the control device 110 shown in fig. 1. The control device 110 further includes a hydraulic bridge 113, and the hydraulic bridge 113 is disposed on a pipeline between the oil inlet of the pressure adjusting device 111 and the oil inlet path and/or the oil outlet path of the oil transportation link 130, that is, the oil inlet of the pressure adjusting device 111 is connected to the oil inlet path and/or the oil outlet path of the oil transportation link 130 through the hydraulic bridge 113.
For the equipment to be adjusted, a hydraulic cylinder 131 of an oil delivery link 130 of the equipment to be adjusted is divided into a cylinder cavity and a rodless cavity, the cylinder cavity and the rodless cavity respectively correspond to an oil way, and when the oil way corresponding to the cylinder cavity is an oil inlet way, the oil way corresponding to the rodless cavity is an oil outlet way; on the contrary, when the oil path corresponding to the oil cylinder cavity is an oil outlet path, the oil path corresponding to the rodless cavity is an oil inlet path.
Specifically, the oil inlet path and the oil outlet path can be determined from the two oil paths according to the movement direction of the piston in the hydraulic cylinder 131.
When the oil inlet of the pressure adjusting device 111 is connected to the oil inlet path and the oil outlet path of the oil transportation link 130, respectively, that is, two lines exist between the oil inlet of the pressure adjusting device 111 and the oil transportation link 130, the hydraulic bridge 113 includes a first check valve 1131 and a second check valve 1132 therein.
When the first check valve 1131 is disposed on the pipeline between the oil inlet of the pressure adjusting device 111 and the oil inlet of the oil transportation link 130, the second check valve 1132 is disposed on the pipeline between the oil inlet of the pressure adjusting device 111 and the oil outlet of the oil transportation link 130.
Similarly, when the first check valve 1131 is disposed on the pipeline between the oil inlet of the pressure adjusting device 111 and the oil outlet of the oil transportation link 130, the second check valve 1132 is disposed on the pipeline between the oil inlet of the pressure adjusting device 111 and the oil inlet of the oil transportation link 130.
Further, as shown in fig. 5, fig. 5 is a fourth schematic structural diagram of the control device 110 shown in fig. 1. When the oil inlet of the pressure regulating device 111 is connected to the oil inlet or the oil outlet of the oil delivery link 130, that is, there is a line between the oil inlet of the pressure regulating device 111 and the oil delivery link 130, the hydraulic bridge 113 includes a third check valve 1133.
The third check valve 1133 is disposed on a pipeline between the oil inlet of the pressure regulating device 111 and the oil inlet path or the oil outlet path of the oil transportation link 130.
Further, as shown in fig. 2, the oil delivery link 130 includes a hydraulic cylinder 131, a pilot operated directional control valve 132, and a hydraulic pump 133.
The first output end of the hydraulic cylinder 131 is connected to the oil port a of the hydraulic control directional control valve 132 through a first oil path, and the second output end of the hydraulic cylinder 131 is connected to the oil port B of the hydraulic control directional control valve 132 through a second oil path, wherein when the first oil path is an oil inlet path, the second oil path is an oil outlet path, and conversely, when the first oil path is an oil outlet path, the second oil path is an oil inlet path.
The P port of the pilot-controlled directional control valve 132 is connected to the pressure oil end of the hydraulic pump 133, and the T port of the pilot-controlled directional control valve 132 is connected to the oil tank through a connection pipe.
Further, as shown in fig. 6, fig. 6 is a fifth schematic structural view of the control device 110 shown in fig. 1. The control device 110 also includes a shuttle valve 114 and a second pressure sensor 115.
The second pressure sensor 115 is disposed on the shuttle valve 114, and is configured to acquire a pressure value of the operating handle 120.
When the operating handle is a hydraulic control handle, the second pressure sensor 115 collects a pressure value of the hydraulic control handle, that is, a pilot pressure value of the hydraulic control handle, and when the pilot pressure value of the hydraulic control handle exceeds a preset pressure threshold, it is determined that a bucket of the equipment to be adjusted is performing a bucket opening or bucket closing action, at this time, it is determined that the hydraulic cylinder 131 has an extending/contracting action, and at this time, the control device 110 is required to adjust the oil supply pressure of the hydraulic cylinder 131.
When the operating handle is an electric control handle, the second pressure sensor 115 collects a pressure value of the electric control handle, that is, a value of an electric control signal output by the electric control handle, and when the value of the electric control signal output by the electric control handle exceeds a preset pressure threshold value, it is determined that a bucket of the equipment to be adjusted is performing an opening or closing motion, at this time, it is determined that the hydraulic cylinder 131 has an extending/contracting motion, and at this time, the control device 110 is required to adjust the oil supply pressure of the hydraulic cylinder 131.
Further, as shown in fig. 7, fig. 7 is a schematic structural diagram of the combined pressure relief valve 1112 shown in fig. 2. The combined pressure relief valve 1112 includes an on-off valve 1112a and a relief valve 1112 b.
The switch valve 1112a is disposed on a pipeline between an input port of the combined pressure relief valve 1112 and an output port of the combined pressure relief valve 1112, and the relief valve 1112b is disposed on a pipeline between the switch valve 1112a and an output port of the combined pressure relief valve 1112.
When the switch valve 1112a is turned on, the relief valve 1112b is turned on, and the oil is returned to the tank through the switch valve 1112a of the combination relief valve 1112 and the relief valve 1112b, so as to reduce the supply pressure of the cylinder 131 in the hydraulic link 130.
Here, when the relief combination valve 1112 includes the relief valve 1112b, the oil supply pressure of the hydraulic cylinder in the oil delivery link can be adjusted in stages, and the spool of the construction machine can be prevented from stalling.
Further, as shown in fig. 8, fig. 8 is a second schematic structural view of the combined pressure relief valve 1112 shown in fig. 2. Combined pressure relief valve 1112 comprises an electric proportional relief valve 1112 c.
An electric proportional relief valve 1112c is provided in the line between the input of the combination pressure relief valve 1112 and the output of the combination pressure relief valve 1112.
When the electric proportional relief valve 1112c is opened according to a preset opening ratio, the oil is returned to the tank through the electric proportional relief valve 1112c in the combination relief valve 1112, so as to reduce the supply pressure of the hydraulic cylinder 131 in the hydraulic link 130.
Here, when the combined relief valve 1112 includes the electric proportional relief valve 1112c, it is possible to realize stepless regulation of the supply pressure of the hydraulic cylinder in the delivery link, that is, it is possible to prevent the reel of the construction machine from stalling without distinguishing the regulation level of the supply pressure in the delivery link.
Like this, this application can gather the fuel feeding pressure of pneumatic cylinder in the oil transportation link through first pressure sensor to when the fuel feeding pressure of pneumatic cylinder in the oil transportation link was gathered to first pressure sensor, through set up in the oil feed way and/or the oil outlet way of the oil transportation link of treating the adjusting device with treat the pressure regulating device between the oil tank of adjusting device, adjust the fuel feeding pressure of pneumatic cylinder in the oil transportation link, and then, realize the real-time regulation to the fuel feeding pressure of pneumatic cylinder in the oil transportation link, can avoid the fuel feeding pressure in the pneumatic cylinder to rise in the twinkling of an eye, help preventing engineering machine's reel from taking place the condition of stall.
Referring to fig. 9, fig. 9 is a flowchart of a method for controlling a pressure of a hydraulic cylinder according to an embodiment of the present disclosure.
And S901, when a first pressure sensor and/or a second pressure sensor in the control device detect/detect a pressure value, generating a corresponding working instruction.
In this step, when any one of the first pressure sensor and/or the second pressure sensor provided in the control device detects a pressure value, a corresponding operation command is generated.
Specifically, the first pressure sensor is used for acquiring the oil supply pressure of the hydraulic cylinder in the oil transportation link, and when the first pressure sensor acquires the oil supply pressure of the hydraulic cylinder in the oil transportation link, it is determined that the hydraulic cylinder has an extending/contracting action, and at this time, the control device is needed to adjust the oil supply pressure of the hydraulic cylinder.
The second pressure sensor is used for collecting the pressure value of an operating handle in the equipment to be regulated, when the operating handle is a hydraulic control handle, the second pressure sensor collects the pressure value of the hydraulic control handle, namely the pilot pressure value of the hydraulic control handle is collected, when the pilot pressure value of the hydraulic control handle exceeds a preset pressure threshold value, the bucket of the equipment to be regulated is determined to be executing bucket opening or bucket closing action, at the moment, the hydraulic cylinder is determined to have stretching/shrinking action, and at the moment, the control device is required to regulate the oil supply pressure of the hydraulic cylinder.
When the operating handle is an electric control handle, the second pressure sensor collects the pressure value of the electric control handle, namely, the electric control signal value output by the electric control handle is collected, when the electric control signal value output by the electric control handle exceeds a preset pressure threshold value, it is determined that a bucket of the equipment to be regulated is executing bucket opening or bucket closing action, at the moment, it is determined that the hydraulic cylinder has stretching/shrinking action, and at the moment, the control device is required to regulate the oil supply pressure of the hydraulic cylinder.
And S902, controlling the corresponding pressure relief combined valve in the pressure regulating device of the control device to work through the main control module according to the working instruction, and reducing the oil supply pressure of a hydraulic cylinder in an oil conveying link.
In this step, according to the working instruction generated in step S901, the main control module controls the corresponding pressure relief combination valve in the pressure regulating device in the control apparatus to operate, so as to reduce the oil supply pressure of the hydraulic pump in the oil delivery link of the device to be regulated.
Specifically, when the oil supply pressure of the hydraulic pump is adjusted in the environment according to the working environment of the equipment to be adjusted, the pressure relief combined valve which needs to be conducted is determined, and when the oil supply pressure of the hydraulic pump needs to be adjusted, the corresponding pressure relief combined valve is conducted according to the adjustment strategy indicated by the working instruction so as to adjust the oil supply pressure of the hydraulic pump.
The pressure relief combined valve can be formed by combining a switch valve and an overflow valve, and can also be an electric proportional overflow valve, and the arrangement mode is determined according to specific conditions and is not limited herein.
According to the method for controlling the pressure of the hydraulic cylinder, when a first pressure sensor and/or a second pressure sensor in the control device detect/detect a pressure value, a corresponding working instruction is generated; and controlling a corresponding pressure relief combined valve in a pressure regulating device of the control device to work through the main control module according to the working instruction, so as to reduce the oil supply pressure of a hydraulic cylinder in an oil conveying link.
Like this, this application can gather the fuel feeding pressure of pneumatic cylinder in the oil transportation link through first pressure sensor to when the fuel feeding pressure of pneumatic cylinder in the oil transportation link was gathered to first pressure sensor, through set up in the oil feed way and/or the oil outlet way of the oil transportation link of treating the adjusting device with treat the pressure regulating device between the oil tank of adjusting device, adjust the fuel feeding pressure of pneumatic cylinder in the oil transportation link, and then, realize the real-time regulation to the fuel feeding pressure of pneumatic cylinder in the oil transportation link, can avoid the fuel feeding pressure in the pneumatic cylinder to rise in the twinkling of an eye, help preventing engineering machine's reel from taking place the condition of stall.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus, device and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another apparatus, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A control device of a hydraulic cylinder pressure, characterized by comprising: a pressure regulating device and a first pressure sensor;
the pressure adjusting device is arranged on a pipeline between an oil inlet path and/or an oil outlet path of an oil conveying link of the equipment to be adjusted and an oil tank of the equipment to be adjusted; the first pressure sensor is arranged on a pipeline between the oil inlet of the pressure adjusting device and the oil conveying link;
the pressure adjusting device acquires the oil supply pressure of the hydraulic cylinder through the first pressure sensor.
2. A control arrangement according to claim 1, characterised in that the pressure regulating means comprises a compensator valve and at least one combined pressure relief valve;
the compensation valve is arranged on a pipeline between an oil inlet of the pressure regulating device and an oil leakage port of the pressure regulating device, and each pressure relief combined valve is arranged on any pipeline between the compensation valve and the oil leakage port of the pressure regulating device.
3. The control device of claim 1, further comprising a hydraulic bridge;
and the hydraulic bridge is arranged on a pipeline between the oil inlet of the pressure regulating device and the oil inlet path and/or the oil outlet path of the oil transportation link.
4. The control device of claim 3, wherein the hydraulic bridge comprises a first check valve and a second check valve when the oil inlet of the pressure regulating device is connected to the oil inlet line and the oil outlet line of the oil transportation link, respectively;
the first check valve is arranged on a pipeline between an oil inlet of the pressure regulating device and an oil inlet path of the oil transportation link, and the second check valve is arranged on a pipeline between the oil inlet of the pressure regulating device and an oil outlet path of the oil transportation link.
5. The control apparatus of claim 3, wherein the hydraulic bridge includes a third check valve when the oil inlet of the pressure regulating device is connected with the oil inlet line or the oil outlet line of the oil transfer link;
the third check valve is arranged on a pipeline between the oil inlet of the pressure regulating device and the oil inlet path or the oil outlet path of the oil transportation link.
6. The control device of claim 1, wherein the oil delivery link includes a hydraulic cylinder, a pilot operated directional control valve, and a hydraulic pump;
the first output end of the hydraulic cylinder is connected with the oil port A of the hydraulic control reversing valve through a first oil path, the second output end of the hydraulic cylinder is connected with the oil port B of the hydraulic control reversing valve through a second oil path, when the first oil path is the oil inlet path, the second oil path is the oil outlet path, and when the first oil path is the oil outlet path, the second oil path is the oil inlet path;
the oil port P of the hydraulic control reversing valve is connected with the oil pressing end of the hydraulic pump, and the oil port T of the hydraulic control reversing valve is connected with the oil tank through a connecting pipe.
7. The control device of claim 6, further comprising a shuttle valve and a second pressure sensor;
the shuttle valve is arranged between the operating handle of the equipment to be regulated and the hydraulic control reversing valve;
the second pressure sensor is arranged on the shuttle valve and used for collecting the pressure value of the operating handle.
8. The control device according to claim 2, wherein the combined pressure relief valve comprises an on-off valve and an overflow valve;
the switch valve is arranged on a pipeline between an input port of the pressure relief combined valve and an output port of the pressure relief combined valve; the overflow valve is arranged on a pipeline between the switch valve and the output port of the pressure relief combined valve;
and when the switch valve is conducted, the overflow valve is conducted to reduce the oil supply pressure in the oil transmission link.
9. The control device of claim 2, wherein the combined pressure relief valve comprises an electrically proportional relief valve;
the electric proportional overflow valve is arranged on a pipeline between an input port of the pressure relief combined valve and an output port of the pressure relief combined valve;
the electric proportional overflow valve is used for conducting according to a preset opening proportion, and oil supply pressure in the oil conveying link is reduced.
10. A control system for the pressure of a hydraulic cylinder, which is characterized by comprising the control device for the pressure of the hydraulic cylinder, an operating handle, an oil delivery link and a main control module according to any one of claims 1 to 9;
when a first pressure sensor in the control device acquires the pressure value of the oil supply pressure of the hydraulic cylinder and/or a second pressure sensor acquires the pressure value of the pilot pressure of the operating handle, the main control module controls a corresponding pressure relief combined valve in a pressure adjusting device of the control device to work.
11. A control method of a hydraulic cylinder pressure, characterized in that the control method is applied to the control apparatus of any one of claims 1 to 9, the control method comprising;
when a first pressure sensor and/or a second pressure sensor in the control device detect/detects a pressure value, generating a corresponding working instruction;
and controlling a corresponding pressure relief combined valve in a pressure regulating device of the control device to work through the main control module according to the working instruction, so as to reduce the oil supply pressure of a hydraulic cylinder in an oil conveying link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163830.8A CN112145501A (en) | 2020-10-27 | 2020-10-27 | Control device, control system and control method for pressure of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163830.8A CN112145501A (en) | 2020-10-27 | 2020-10-27 | Control device, control system and control method for pressure of hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN112145501A true CN112145501A (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011163830.8A Pending CN112145501A (en) | 2020-10-27 | 2020-10-27 | Control device, control system and control method for pressure of hydraulic cylinder |
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| CN (1) | CN112145501A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943714A (en) * | 2021-01-18 | 2021-06-11 | 济南重工集团有限公司 | Push bench propelling pressure stepless regulation method, device and equipment |
| WO2022205815A1 (en) * | 2021-03-29 | 2022-10-06 | 徐州徐工挖掘机械有限公司 | Pilot proportional control valve apparatus, automatic calibration method and medium |
-
2020
- 2020-10-27 CN CN202011163830.8A patent/CN112145501A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943714A (en) * | 2021-01-18 | 2021-06-11 | 济南重工集团有限公司 | Push bench propelling pressure stepless regulation method, device and equipment |
| WO2022205815A1 (en) * | 2021-03-29 | 2022-10-06 | 徐州徐工挖掘机械有限公司 | Pilot proportional control valve apparatus, automatic calibration method and medium |
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