CN112943723A - Hydraulic intelligent self-heating system and self-heating method - Google Patents
Hydraulic intelligent self-heating system and self-heating method Download PDFInfo
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- CN112943723A CN112943723A CN202110320487.1A CN202110320487A CN112943723A CN 112943723 A CN112943723 A CN 112943723A CN 202110320487 A CN202110320487 A CN 202110320487A CN 112943723 A CN112943723 A CN 112943723A
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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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
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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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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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a hydraulic intelligent self-heating system and a self-heating method. It has solved current design technical problem such as reasonable inadequately. The hydraulic oil cooling system comprises a hydraulic oil tank, a hydraulic oil temperature sensor, a controller, a display control module, a cooling pump, a variable pump, a cooling pressure valve, a second electromagnetic directional valve, a hydraulic oil return block and a hydraulic oil temperature control valve, wherein the hydraulic oil temperature control valve is connected with the hydraulic oil tank and the hydraulic oil cooler in parallel, the second electromagnetic directional valve is connected with a fan motor and one end of a first electromagnetic directional valve in parallel, the first electromagnetic directional valve is connected with the fan motor, the fan motor is connected with the hydraulic oil return block, the variable pump is connected with a self-heating pressure valve and the hydraulic oil return block through an electromagnetic pressure regulating valve, and the self-heating pressure valve and the cooling pressure valve are overflow valves. Has the advantages that: the mode that adopts the double pump to carry out high-pressure overflow and generate heat promotes hydraulic oil fast, solves the rock drill rig high cold low temperature environment hydraulic oil system fluid temperature promotion slowly.
Description
Technical Field
The invention belongs to the technical field of engineering equipment, and particularly relates to a hydraulic intelligent self-heating system and a self-heating method.
Background
Along with the widening of the use field of the drilling machine, the working conditions of high altitude and low environmental temperature are more and more, particularly, the drilling machine enters severe winter in 10 months in the north, and the system temperature of the rock drilling machine in the severe environment is difficult to quickly reach a reasonable working range. For example, the preheating of hydraulic oil is applied to various hydraulic devices to rapidly raise the temperature of the hydraulic oil and improve the fluidity and controllability of the oil in a hydraulic system. The hydraulic control preheating in the rock drilling machine is mainly used for solving the problems of slow execution and heavy load of important actions such as positioning, walking, rock drilling (rotation and propulsion) and the like caused by a low-temperature environment. The output efficiency of the hydraulic system is improved, and the damage of low temperature and high viscosity to hydraulic elements is reduced. Under the common condition, a heating element is added in an oil tank, or the hydraulic oil is heated in a baking and releasing mode, the baking or heating element heats the hydraulic oil, a heating source is directly contacted with the hydraulic oil, the process of local high-temperature retransmission belongs to the process of local high temperature, the local high temperature is uncontrollable, the molecular structure and the organization of the hydraulic oil are abnormal, the hydraulic oil can be seriously and directly deteriorated and cannot be used, and certain safety risk exists. Due to the use limitation, the replacement and maintenance are not timely, and the early abrasion and even damage of the hydraulic power element can be caused, so that unnecessary economic loss is caused. Therefore, it is very important to develop a method capable of rapidly increasing the temperature of the oil of the hydraulic equipment.
In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, chinese patent document discloses a preheating structure of a hydraulic system [ application No.: CN201010239592.4], including the first check valve and the second check valve connected with the hydraulic main loop respectively, the export of the first check valve is connected with the hydraulic tank through the hydraulic oil radiator, the export of the second check valve is connected with the hydraulic tank, its characterized in that: and a thermostat is arranged between the hydraulic main loop and the first one-way valve as well as between the hydraulic main loop and the second one-way valve, the inlet of the thermostat is connected with the hydraulic main loop, the outlet T of the thermostat is connected with the inlet of the first one-way valve, and the outlet P of the thermostat is connected with the inlet of the second one-way valve.
The problem that the effect is poor is preheated to current hydraulic oil has been solved to a certain extent to above-mentioned scheme, but this scheme still has a lot of not enoughly, for example, degree of automation is low, economic energy-concerving and environment-protective inadequately, the rapid scheduling problem inadequately of intensification.
Disclosure of Invention
The invention aims to solve the problems and provides a hydraulic intelligent self-heating system which is reasonable in design and can improve the temperature rise speed of hydraulic oil.
Another object of the present invention is to solve the above problems and provide a hydraulic intelligent self-heating method which is easy to implement and highly automated.
In order to achieve the purpose, the invention adopts the following technical scheme: this hydraulic pressure intelligence is from heating system, including hydraulic tank, hydraulic tank in be equipped with hydraulic oil temperature sensor, its characterized in that, hydraulic oil temperature sensor link to each other with the controller, the controller link to each other with display control module, hydraulic tank on be connected with cooling pump and variable pump respectively, the cooling pump parallelly connected with cooling pressure valve and second electromagnetic directional valve respectively, cooling pressure valve pass through hydraulic oil return oil piece and link to each other with the hydraulic oil temperature-sensing valve, just hydraulic oil temperature-sensing valve parallelly connected with hydraulic tank and hydraulic oil cooler respectively, and second electromagnetic directional valve respectively with fan motor's one end and first electromagnetic directional valve one end each other and link to each other, the other end of first electromagnetic directional valve and fan motor link to each other, fan motor and hydraulic oil return oil piece link to each other, the variable pump is connected with the self-heating pressure valve and the hydraulic oil return block through the electromagnetic pressure regulating valve, the self-heating pressure valve and the cooling pressure valve are overflow valves, and the first electromagnetic directional valve, the second electromagnetic directional valve and the electromagnetic pressure regulating valve are all connected with the controller. By the system, the problems that the temperature of oil liquid of a hydraulic oil system is slowly increased in a rock drilling machine high-cold low-temperature environment and the damage to the hydraulic oil caused by a traditional temperature rising mode are solved, the limitation of the drilling machine to the use environment is improved through the system configuration, and the competitive advantage of the drilling machine is improved. The hydraulic intelligent self-heating system mainly adopts a sensing device and a temperature control component, and is matched with the logic setting of a controller, so that the hydraulic oil self-heating system is controlled to work and quickly heat up in a low-temperature environment. The principle of the hydraulic oil self-heating system is that high-pressure overflow of hydraulic oil is adopted to generate heat, and the high-pressure overflow of the hydraulic oil is matched with a hot air heating oil tank and a pipeline for heat dissipation of a power source to realize rapid temperature rise, so that the hydraulic oil self-heating system is economical, energy-saving and environment-friendly, rapid in temperature rise and capable of intelligently adjusting temperature control.
In the above-mentioned hydraulic intelligent self-heating system, the fan motor and the hydraulic oil cooler are arranged correspondingly to each other.
In the hydraulic intelligent self-heating system, one end of the variable pump is connected with one end of the load sensitive valve, and the other end of the load sensitive valve is connected with the electromagnetic pressure regulating valve and the other end of the variable pump in parallel.
In the hydraulic intelligent self-heating system, the hydraulic oil return block is connected with the end A of the hydraulic oil temperature control valve, the end B of the hydraulic oil temperature control valve is connected with the hydraulic oil tank, the end C of the hydraulic oil temperature control valve is connected with one end of the hydraulic oil cooler, and the other end of the hydraulic oil cooler is connected with the end B of the hydraulic oil temperature control valve and the hydraulic oil tank in parallel.
In the hydraulic intelligent self-heating system, the controller and the display control module are respectively connected with a 24V power module, and the hydraulic oil temperature sensor, the first electromagnetic directional valve, the second electromagnetic directional valve and the electromagnetic pressure regulating valve are respectively connected with the 24V power module in parallel.
In the above hydraulic intelligent self-heating system, the display control module is a touch display screen.
The hydraulic intelligent self-heating method of the hydraulic intelligent self-heating system is as follows: the hydraulic intelligent self-heating method comprises the following steps:
A. setting a lowest working temperature value through a display control module;
B. the temperature of hydraulic oil in a hydraulic oil tank is detected through a hydraulic oil temperature sensor, when the temperature of the hydraulic oil is lower than a set lowest working temperature value, a cooling pressure valve conducts high-pressure overflow heating, an oil way of a motor fan is cut off, heat dissipation is stopped, and double pumps heat the hydraulic oil simultaneously through the high-pressure overflow of the self-heating pressure valve;
C. the hydraulic oil temperature in the hydraulic oil tank is detected through a hydraulic oil temperature sensor, when the hydraulic oil temperature is close to a set lowest working temperature value, the first electromagnetic pressure regulating valve enters a micropressure state, and a motor fan starts to operate at a rotating speed;
D. the hydraulic oil temperature in the hydraulic oil tank is detected through the hydraulic oil temperature sensor, when the hydraulic oil temperature exceeds a set minimum working temperature value, the working state of the first electromagnetic pressure regulating valve is controlled through the controller, and the rotating speed of the motor fan is regulated to indirectly control the hydraulic oil temperature to be kept in a reasonable range.
The whole system passes through the signal of a hydraulic oil temperature sensor and meets the temperature control requirement set by a display control module, a controller controls the working states of a first electromagnetic directional valve, a second electromagnetic directional valve and an electromagnetic pressure regulating valve, low-temperature intelligent self-heating adjustment is realized, the temperature is basically constantly regulated and controlled in the working process, hydraulic oil is quickly lifted by adopting a high-pressure overflow heating mode of a hydraulic system, the mode is not limited, meanwhile, no damage is caused to the quality of the hydraulic oil, the function configuration which is safe and reliable is realized through reasonable design, the hidden dangers that the service life of various hydraulic elements is short due to the low-temperature environment of the hydraulic oil are solved, and the adaptability of the working environment of the drilling machine is improved.
In the hydraulic intelligent self-heating method, in the step B, when the temperature of the hydraulic oil is lower than the set minimum working temperature value, the controller controls the first electromagnetic directional valve and the second electromagnetic directional valve to be switched on, the high-pressure oil paths of the cooling pump and the variable pump are respectively converted through the second electromagnetic directional valve and the electromagnetic pressure regulating valve, the hydraulic oil in the cooling pump carries out high-pressure overflow heating through the cooling pressure valve, and meanwhile, the motor oil source of the cooling fan is cut off, and the heat dissipation is stopped; the hydraulic oil in the variable displacement pump respectively passes through the electromagnetic pressure regulating valve and is subjected to high-pressure overflow through the self-heating pressure valve to realize that the double pumps simultaneously heat the hydraulic oil, and the quick self-heating can be realized along with the heat dissipation without a cooler.
In the above-mentioned hydraulic intelligent self-heating method, in step C, when the hydraulic oil temperature approaches the set minimum operating temperature value, the fan motor operates at an operating speed of 80-120 rpm.
In the hydraulic intelligent self-heating method, in the step D, when the hydraulic oil temperature exceeds the set lowest working temperature value by more than 5 ℃, the electromagnetic pressure regulating valve is powered off, the display control module prompts the completion of preheating, and the controller controls the working state of the first electromagnetic reversing valve to regulate the rotating speed of the fan motor to indirectly control the hydraulic oil temperature.
Compared with the prior art, the invention has the advantages that: the mode that adopts the double pump to carry out high pressure overflow and generate heat promotes hydraulic oil fast, this mode is unrestricted, do not cause any damage to the quality of hydraulic oil simultaneously, be a not only safe but also reliable functional configuration through reasonable design, solved hydraulic oil low temperature environment and caused various hydraulic component trouble hidden dangers such as life weak point, improve rig operational environment adaptability, it is slow to solve hydraulic oil system fluid temperature promotion under rock drilling machine high and cold low temperature environment, and the harm that traditional intensification mode brought for hydraulic oil, improve the rig through self system configuration to service environment's limitation, improve the competitive advantage of rig.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a hydraulic schematic of the present invention;
FIG. 3 is a hydraulic implementation of the present invention;
FIG. 4 is an electrical schematic of the present invention;
in the figure, a hydraulic oil temperature sensor B1, a controller EC1, a display control module EC2, a first electromagnetic directional valve Y1, a second electromagnetic directional valve Y2, an electromagnetic pressure regulating valve Y3, a fan motor 1, a thermostatic valve 2, an oil return block 3, a cooler 4, a cooling pump 5, a variable pump 6, a cooling pressure valve 7, an auto-heating pressure valve 8, a hydraulic oil tank 9 and a load sensitive valve 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the hydraulic intelligent self-heating system comprises a hydraulic oil tank 9, a hydraulic oil temperature sensor B1 is arranged in the hydraulic oil tank 9, the hydraulic oil temperature sensor B1 is connected with a controller EC1, the controller EC1 is connected with a display control module EC2, the hydraulic oil tank 9 is connected with a cooling pump 5 and a variable pump 6 respectively, the cooling pump 5 is connected with a cooling pressure valve 7 and a second electromagnetic directional valve Y2 respectively in parallel, the cooling pressure valve 7 is connected with a hydraulic oil temperature control valve 2 through a hydraulic oil return block 3, the hydraulic oil temperature control valve 2 is connected with the hydraulic oil tank 9 and a hydraulic oil cooler 4 respectively in parallel, the second electromagnetic directional valve Y2 is connected with one end of a fan motor 1 and one end of a first electromagnetic directional valve Y1 respectively in parallel, the other end of the first electromagnetic directional valve Y1 is connected with the other end of the fan motor 1, preferably, the fan motor 1 and the hydraulic oil cooler 4 are arranged correspondingly, when normal work is realized, the fan motor 1 dissipates heat of the hydraulic oil cooler 4, the fan motor 1 is connected with the hydraulic oil return block 3, the variable displacement pump 6 is connected with the self-heating pressure valve 8 and the hydraulic oil return block 3 through the electromagnetic pressure regulating valve Y3, the self-heating pressure valve 8 and the cooling pressure valve 7 are overflow valves, and the first electromagnetic directional valve Y1, the second electromagnetic directional valve Y2 and the electromagnetic pressure regulating valve Y3 are all connected with the controller EC 1. The system solves the problems that the temperature of oil liquid of a hydraulic oil system is slowly increased in a rock drilling machine in a high-cold low-temperature environment, and the damage to the hydraulic oil is caused by a traditional temperature rising mode, improves the limitation of the drilling machine to the use environment through self system configuration, and improves the competitive advantage of the drilling machine. The hydraulic intelligent self-heating system mainly adopts a sensing device and a temperature control component, and is matched with the logic setting of a controller, so that the hydraulic oil self-heating system is controlled to work and quickly heat up in a low-temperature environment. The principle of the hydraulic oil self-heating system is that high-pressure overflow of hydraulic oil is adopted to generate heat, and the high-pressure overflow of the hydraulic oil is matched with a hot air heating oil tank and a pipeline for heat dissipation of a power source to realize rapid temperature rise, so that the hydraulic oil self-heating system is economical, energy-saving and environment-friendly, rapid in temperature rise and capable of intelligently adjusting temperature control.
Wherein, one end of the variable pump 6 is connected with one end of the load sensitive valve 10, and the other end of the load sensitive valve 10 is respectively connected with the electromagnetic pressure regulating valve Y3 and the other end of the variable pump 6 in parallel. Further, the hydraulic oil return block 3 is connected with the end a of the hydraulic oil temperature control valve 2, the end B of the hydraulic oil temperature control valve 2 is connected with the hydraulic oil tank 9, the end C of the hydraulic oil temperature control valve 2 is connected with one end of the hydraulic oil cooler 4, and the other end of the hydraulic oil cooler 4 is respectively connected with the end B of the hydraulic oil temperature control valve 2 and the hydraulic oil tank 9 in parallel.
Preferably, the controller EC1 and the display control module EC2 are connected to a 24V power module, respectively, and the hydraulic oil temperature sensor B1, the first electromagnetic directional valve Y1, the second electromagnetic directional valve Y2 and the electromagnetic pressure regulating valve Y3 are connected in parallel to the 24V power module, respectively, wherein the display control module EC2 is a touch display screen, and the touch display screen structure is adopted to complete instruction input.
The hydraulic intelligent self-heating method in the embodiment comprises the following steps:
A. setting a minimum working temperature value through a display control module EC 2;
B. the hydraulic oil temperature in the hydraulic oil tank 9 is detected by a hydraulic oil temperature sensor B1, when the hydraulic oil temperature is lower than a set minimum working temperature value, the cooling pressure valve 7 carries out high-pressure overflow heating, a motor fan oil way is cut off, heat dissipation is stopped, and double pumps heat the hydraulic oil simultaneously by virtue of high-pressure overflow of the self-heating pressure valve 8;
C. the hydraulic oil temperature in the hydraulic oil tank 9 is detected by a hydraulic oil temperature sensor B1, when the hydraulic oil temperature is close to a set lowest working temperature value, the first electromagnetic pressure regulating valve Y3 enters a micropressure state, and a motor fan starts to operate at a rotating speed;
D. the hydraulic oil temperature in the hydraulic oil tank 9 is detected by a hydraulic oil temperature sensor B1, and when the hydraulic oil temperature exceeds a set minimum working temperature value, the working state of the first electromagnetic pressure regulating valve Y3 is controlled by a controller EC1, and the rotating speed of a motor fan is regulated to indirectly control the hydraulic oil temperature to be kept in a reasonable range.
In the step B, when the hydraulic oil temperature is lower than the set minimum working temperature value, the controller EC1 controls the first electromagnetic directional valve Y1 and the second electromagnetic directional valve Y2 to be switched on, the high-pressure oil paths of the cooling pump 5 and the variable pump 6 are respectively switched through the second electromagnetic directional valve Y2 and the electromagnetic pressure regulating valve Y3, the hydraulic oil in the cooling pump 5 is subjected to high-pressure overflow heating through the cooling pressure valve 7, and the oil source of the cooling fan motor 1 is cut off at the same time, so that the heat dissipation is stopped; the hydraulic oil in the variable displacement pump 6 passes through the electromagnetic pressure regulating valve Y3 and overflows through the self-heating pressure valve 8 at high pressure to realize that the double pumps heat the hydraulic oil simultaneously, and the quick self-heating can be realized along with the heat dissipation of the cooler 4.
In step C, when the hydraulic oil temperature approaches the set minimum operating temperature value, the fan motor 1 operates at an operating speed of 80-120 rpm.
In step D, when the hydraulic oil temperature exceeds the set minimum operating temperature value by more than 5 ℃, the electromagnetic pressure regulating valve Y3 is de-energized, the display control module EC2 prompts completion of preheating, and the controller EC1 controls the operating state of the first electromagnetic directional valve Y1 to regulate the rotation speed of the fan motor 1 to indirectly control the hydraulic oil temperature.
The whole system passes through the signal of a hydraulic oil temperature sensor B1 and the temperature control requirement set by a display control module EC2, a controller controls the working states of a first electromagnetic directional valve Y1, a second electromagnetic directional valve Y2 and an electromagnetic pressure regulating valve Y3, low-temperature intelligent self-heating adjustment is realized, the temperature is regulated and controlled basically constantly in the working process, hydraulic oil is quickly lifted in a hydraulic system high-pressure overflow heating mode, the mode is not limited, the quality of the hydraulic oil is not damaged at all, the system is safe and reliable in function configuration through reasonable design, the hidden dangers that various hydraulic elements are short in service life and the like due to the low-temperature environment of the hydraulic oil are solved, and the adaptability of the working environment of the drilling machine is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although terms such as the hydraulic oil temperature sensor B1, the controller EC1, the display control module EC2, the first electromagnetic directional valve Y1, the second electromagnetic directional valve Y2, the electromagnetic pressure regulating valve Y3, the fan motor 1, the thermo valve 2, the oil return block 3, the cooler 4, the cooling pump 5, the variable pump 6, the cooling pressure valve 7, the self-heating pressure valve 8, the hydraulic oil tank 9, the load sensitive valve 10, and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a hydraulic pressure intelligence is from heating system, includes hydraulic tank (9), hydraulic tank (9) in be equipped with hydraulic oil temperature sensor (B1), its characterized in that, hydraulic oil temperature sensor (B1) link to each other with controller (EC1), controller (EC1) link to each other with display control module (EC2), hydraulic tank (9) on be connected with cooling pump (5) and variable pump (6) respectively, cooling pump (5) respectively with cooling pressure valve (7) and second electromagnetic directional valve (Y2) looks parallel connection, cooling pressure valve (7) link to each other with hydraulic oil temperature-sensing valve (2) through hydraulic oil piece (3) that returns, just hydraulic oil temperature-sensing valve (2) respectively with hydraulic tank (9) and cooler (4) looks parallel connection, just second electromagnetic directional valve (Y2) respectively with the one end of fan motor (1) and first electromagnetic directional valve (Y1) one end parallel connection each other, the hydraulic control system is characterized in that the other end of the first electromagnetic reversing valve (Y1) is connected with the other end of the fan motor (1), the fan motor (1) is connected with the hydraulic oil return block (3), the variable pump (6) is connected with the self-heating pressure valve (8) and the hydraulic oil return block (3) through an electromagnetic pressure regulating valve (Y3), the self-heating pressure valve (8) and the cooling pressure valve (7) are overflow valves, and the first electromagnetic reversing valve (Y1), the second electromagnetic reversing valve (Y2) and the electromagnetic pressure regulating valve (Y3) are connected with the controller (EC 1).
2. The intelligent hydraulic self-heating system according to claim 1, wherein the fan motor (1) and the hydraulic oil cooler (4) are disposed in correspondence with each other.
3. The hydraulic intelligent self-heating system as claimed in claim 2, wherein one end of the variable pump (6) is connected with one end of a load sensitive valve (10), and the other end of the load sensitive valve (10) is respectively connected with an electromagnetic pressure regulating valve (Y3) and the other end of the variable pump (6) in parallel.
4. The intelligent hydraulic self-heating system according to claim 1, 2 or 3, wherein the hydraulic oil return block (3) is connected to the end A of the hydraulic oil temperature control valve (2), the end B of the hydraulic oil temperature control valve (2) is connected to the hydraulic oil tank (9), the end C of the hydraulic oil temperature control valve (2) is connected to one end of the hydraulic oil cooler (4), and the other end of the hydraulic oil cooler (4) is connected to the end B of the hydraulic oil temperature control valve (2) and the hydraulic oil tank (9) in parallel.
5. The hydraulic intelligent self-heating system as claimed in claim 1, wherein the controller (EC1) and the display control module (EC2) are respectively connected with a 24V power module, and the hydraulic oil temperature sensor (B1), the first electromagnetic directional valve (Y1), the second electromagnetic directional valve (Y2) and the electromagnetic pressure regulating valve (Y3) are respectively connected with the 24V power module in parallel.
6. The hydraulic intelligent self-heating system according to claim 1, wherein the display control module (EC2) is a touch screen display.
7. A hydraulic intelligent self-heating method of a hydraulic intelligent self-heating system according to any one of claims 1-6, characterized by comprising the following steps:
A. setting a minimum operating temperature value by a display control module (EC 2);
B. the temperature of hydraulic oil in a hydraulic oil tank (9) is detected through a hydraulic oil temperature sensor (B1), when the temperature of the hydraulic oil is lower than a set minimum working temperature value, a cooling pressure valve (7) conducts high-pressure overflow heating, an oil way of a motor fan is cut off, heat dissipation is stopped, and double pumps heat the hydraulic oil simultaneously through high-pressure overflow of a self-heating pressure valve (8);
C. the temperature of hydraulic oil in a hydraulic oil tank (9) is detected through a hydraulic oil temperature sensor (B1), when the temperature of the hydraulic oil is close to a set lowest working temperature value, a first electromagnetic pressure regulating valve (Y3) enters a micropressure state, and a motor fan starts to operate at a rotating speed;
D. the hydraulic oil temperature in the hydraulic oil tank (9) is detected through a hydraulic oil temperature sensor (B1), when the hydraulic oil temperature exceeds a set minimum working temperature value, the working state of a first electromagnetic pressure regulating valve (Y3) is controlled through a controller (EC1), and the rotating speed of a motor fan is regulated to indirectly control the hydraulic oil temperature to be kept in a reasonable range.
8. The hydraulic intelligent self-heating method according to claim 7, wherein in step B, when the hydraulic oil temperature is lower than the set minimum working temperature value, the controller (EC1) controls the first electromagnetic directional valve (Y1) and the second electromagnetic directional valve (Y2) to be switched on, the high-pressure oil paths of the cooling pump (5) and the variable pump (6) are respectively switched through the second electromagnetic directional valve (Y2) and the electromagnetic pressure regulating valve (Y3), the hydraulic oil in the cooling pump (5) is subjected to high-pressure overflow heating through the cooling pressure valve (7), the oil source of the cooling fan motor (1) is cut off, and heat dissipation is stopped; the hydraulic oil in the variable displacement pump (6) passes through the electromagnetic pressure regulating valve (Y3) and overflows through the self-heating pressure valve (8) at high pressure to realize that the double pumps heat the hydraulic oil simultaneously, and the quick self-heating can be realized along with the heat dissipation without the cooler (4).
9. Hydraulic intelligent auto-heating method according to claim 7, characterized in that in step C, the fan motor (1) is operated at an operating speed of 80-120rpm when the hydraulic oil temperature approaches the set minimum operating temperature value.
10. The hydraulic intelligent self-heating method according to claim 7, wherein in step D, when the hydraulic oil temperature exceeds the set minimum working temperature value by more than 5 ℃, the electromagnetic pressure regulating valve (Y3) is powered off, the display control module (EC2) prompts the completion of preheating, and the rotation speed of the fan motor (1) is regulated by controlling the working state of the first electromagnetic directional valve (Y1) through the controller (EC1) to indirectly control the hydraulic oil temperature.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113983009A (en) * | 2021-10-28 | 2022-01-28 | 三一重机有限公司 | Fan rotating speed control system, fan rotating speed control method and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113983009A (en) * | 2021-10-28 | 2022-01-28 | 三一重机有限公司 | Fan rotating speed control system, fan rotating speed control method and engineering machinery |
| CN113983009B (en) * | 2021-10-28 | 2023-10-27 | 三一重机有限公司 | Fan rotation speed control system, fan rotation speed control method and engineering machinery |
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| CN112943723B (en) | 2023-06-06 |
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