CN117869429A - Intelligent digital low-temperature hydraulic system - Google Patents
Intelligent digital low-temperature hydraulic system Download PDFInfo
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- CN117869429A CN117869429A CN202410022929.8A CN202410022929A CN117869429A CN 117869429 A CN117869429 A CN 117869429A CN 202410022929 A CN202410022929 A CN 202410022929A CN 117869429 A CN117869429 A CN 117869429A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 299
- 238000001816 cooling Methods 0.000 claims abstract description 157
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 86
- 239000003921 oil Substances 0.000 claims abstract description 55
- 230000001276 controlling effect Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 55
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- F15B21/0423—Cooling
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6343—Electronic controllers using input signals representing a temperature
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/66—Temperature control methods
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the field of hydraulic systems, in particular to an intelligent digital low-temperature hydraulic system, which comprises a hydraulic oil temperature control circulating system, a water cooling system and an electric intelligent control device, wherein the electric intelligent control device is used for controlling the circulating water temperature before and after cooling obtained by a temperature detector arranged at a circulating water inlet and outlet of the water cooling system and the hydraulic oil temperature before and after cooling obtained by a temperature detector arranged at an oil outlet of an oil suction box and an oil inlet of an oil return box in the hydraulic oil temperature control circulating system, analyzing the obtained temperature information, and regulating the circulating water speed and the circulating water temperature in the water cooling system in real time according to the analysis result so as to ensure that the hydraulic oil can be recycled in a low-temperature state. The system can monitor and analyze the running state of the system in real time, and automatically adjust and optimize the running state according to the requirements so as to improve the performance, efficiency and energy consumption management of the system.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to an intelligent digital low-temperature hydraulic system.
Background
The low-temperature hydraulic system is a control system which works in an extremely low-temperature environment. Working medium and materials suitable for low temperature are adopted to ensure normal operation of elements and sealing, and control strategies and algorithms are optimized to ensure reliability and performance of the system. With technological advances and industrial development, more and more applications need to operate in low temperature environments, such as polar exploration, cooling systems for spacecraft, etc.
The patent document with publication number CN105114402A discloses an intelligent low-temperature hydraulic system, which comprises a frame, a motor, a hydraulic pump hydraulic control valve group, an oil tank and hydraulic auxiliaries, wherein the motor, the hydraulic pump hydraulic control valve group, the oil tank and the hydraulic oil temperature control circulating system are arranged on the frame, and the hydraulic oil temperature control circulating system is connected to the oil tank and used for controlling the oil temperature of hydraulic oil in the oil tank; the wind energy heat dissipation system is arranged at the lower part of the frame and used for enabling air in the space where the oil tank is positioned to flow, and the electric control device is used for controlling the hydraulic system, the hydraulic oil temperature control circulation system and the wind energy heat dissipation channel.
It follows that the cryogenic hydraulic system has the following problems:
the existing hydraulic system adopts an air cooling device for cooling, the heat dissipation effect of the air cooling device is poor, the heat dissipation effect of the air cooling system is relatively poor, the air cooling system mainly relies on a fan to dissipate heat through air flow, the heat transfer efficiency is relatively low, and the heat dissipation effect of the air cooling system under high-load operation may not meet the working temperature of the hydraulic system; because the air cooling system is used for radiating heat by relying on the rotating speed of the fan, the generated noise is relatively large, particularly when the rotating speed of the fan is high, the noise is more obvious, and the use environment is possibly disturbed; large air-cooled heat sinks are often relatively bulky, requiring more space to install; the heat dissipation effect is unstable: the air cooling system is easily affected by factors such as ambient temperature, fan rotating speed and the like, and the heat dissipation effect may have certain fluctuation, which may cause unstable temperature control or failure to achieve the expected effect under the condition of large load change.
Disclosure of Invention
Therefore, the invention provides an intelligent digital low-temperature hydraulic system which is used for solving the problem that the heat dissipation effect of an air cooling system under high-load operation in the prior art possibly cannot meet the working temperature of the hydraulic system.
In order to achieve the above object, the present invention provides an intelligent digital low-temperature hydraulic system, which is characterized by comprising,
the hydraulic control system comprises a frame, a motor, a hydraulic pump and a hydraulic control valve group are arranged above the frame, and an oil suction tank, an oil return tank, a water cooling system for cooling hydraulic oil and an electric intelligent control device for controlling the hydraulic system, the hydraulic oil temperature control circulating system and the water cooling system;
the electric intelligent control device controls the motor to rotate so as to drive the hydraulic pump, the hydraulic pump discharges the hydraulic oil sucked from the oil suction box into pressure oil and enables the pressure oil to flow to the hydraulic control valve group, the pressure oil becomes low-pressure high-temperature hydraulic oil after the hydraulic control valve group works, then the hydraulic oil flows to the oil return box from the oil outlet of the hydraulic control valve group,
the oil return tank conveys the low-pressure high-temperature hydraulic oil into the water cooling system, the low-pressure low-temperature hydraulic oil is cooled in the water cooling system and then conveyed into the oil suction tank for reuse by the hydraulic pump, and the hydraulic oil of the whole hydraulic system can be in a low-temperature safe state;
the first temperature detector is arranged at the pipe orifice of the oil suction tank and used for detecting the temperature of hydraulic oil before cooling;
the second temperature detector is arranged at the pipe orifice of the oil return tank and used for detecting the temperature of the cooled hydraulic oil;
the third temperature detector is arranged at the outlet of the water cooling system and used for detecting the initial temperature of circulating water in the water cooling system;
the fourth temperature detector is arranged at the inlet of the water cooling system and is used for detecting the single cycle ending temperature of the circulating water in the water cooling system;
the electric intelligent control device calculates a theoretical water circulation speed according to the temperature of the hydraulic oil before cooling detected by the first temperature detector and the temperature of the water before cooling detected by the third temperature detector and analyzes whether the water cooling system needs to be controlled to adjust the circulation water flow speed;
the electric intelligent control device analyzes whether the water cooling system is required to be controlled to adjust the circulating water flow speed according to the temperature of the cooled hydraulic oil detected by the second temperature detector and the temperature of the cooled water detected by the fourth temperature detector;
and the electric intelligent control device corrects the speed of the circulating water flow regulated by the water cooling system according to the temperature of the hydraulic oil before cooling detected by the first temperature detector in real time and the initial temperature of the circulating water in the water cooling system detected by the third temperature detector in real time.
Further, the first temperature detection module detects the initial temperature of the hydraulic oil entering the water cooling system area, the electric intelligent control device calculates the theoretical circulating water flow speed in the water cooling system through the acquired temperature information, compares the theoretical circulating water flow speed with the circulating water flow speed range preset by the electric intelligent control device,
if the theoretical circulating water flow speed is smaller than the minimum value of the speed in the preset circulating water flow speed range, starting a refrigerating module, and reducing the water temperature in the water cooling system until the theoretical circulating water flow speed calculated by the electric intelligent control device according to the acquired temperature information is in the preset circulating water flow speed range, wherein the water cooling system keeps the adjusted water temperature and the theoretical circulating water flow speed for water circulation;
if the theoretical circulating water flow speed is greater than the maximum speed of the circulating water flow speed range preset by the electric intelligent control device, the water cooling system stops working until the theoretical circulating water flow speed calculated by the electric intelligent control device according to the temperature information acquired again by the first temperature detection module is within the circulating water flow speed range preset by the electric intelligent control device, and the water cooling system keeps the adjusted theoretical circulating water flow speed for water circulation.
Further, if the theoretical circulating water flow speed is within the circulating water flow speed range preset by the electric intelligent control device, the water cooling system circulates water at the theoretical circulating water flow speed.
Further, the second temperature detection module detects the temperature of the hydraulic oil after the initial operation is stabilized for a period of time when cooling is completed in the water cooling system area, the fourth temperature detection module detects the temperature of the circulating water at the water inlet of the water cooling system after the initial operation is stabilized for a period of time, the electric intelligent control device compares the obtained temperature information with the preset temperature range in the electric intelligent control device,
if the temperature of the hydraulic oil in the water cooling system area after cooling is smaller than the minimum value of the temperature in the preset temperature range, the water cooling system reduces the theoretical water circulation speed until the temperature of the cooled hydraulic oil is in the preset temperature range;
if the temperature of the hydraulic oil in the water cooling system area after cooling is larger than the maximum value of the temperature range, the water cooling system increases the theoretical water circulation speed until the temperature of the cooled hydraulic oil is within the preset temperature range.
Further, if the temperature of the hydraulic oil at the time of cooling in the water cooling system area is within a preset temperature range, the water cooling system circulates water at the theoretical circulating water flow rate.
Further, the third temperature detection module detects the initial circulating water temperature in the water cooling system, the electric intelligent control device analyzes according to the temperature information acquired by the third temperature detection module and the temperature information acquired by the first temperature detection module, calculates and corrects the actual water circulating speed by the temperature information acquired by the third temperature detection module,
when the water cooling system is initially operated, circulating at a theoretical water circulation speed, the temperature of circulating water obtained in real time by the third temperature detection module corresponds to each theoretical circulating water flow speed in a preset circulating water flow speed range, the electric intelligent control device corrects each theoretical circulating water flow speed in the preset circulating water flow speed range according to the temperature of circulating water obtained in real time and the temperature of water in the water cooling system detected in real time by the third temperature detection module, temperature information is detected again, the corrected actual circulating water flow speed is calculated, and the corrected actual circulating water flow speed is ensured to be in the preset circulating water flow speed range.
Further, the electric intelligent control device is preset with each speed value in the theoretical range of the preset water circulation speed corresponding to the initial circulating water temperature in the water cooling system, analyzes according to the temperature information acquired by the third temperature detection module and the temperature acquired by the first temperature detection module, calculates the actual water circulation speed according to the temperature information acquired by the electric intelligent control device through the third temperature detection module,
the electric intelligent control device corrects the actual water circulation speed according to the temperature of the water in the water cooling system obtained in real time and detected by the third temperature detection module, calculates the temperature information, calculates the corrected speed, and ensures that the corrected speed is within the preset theoretical water circulation range.
Further, the water cooling system includes:
the water pump is used for controlling the circulation speed of water in the water cooling system;
and the refrigeration module is connected with the water pump and used for reducing the temperature of water in the water cooling system.
Further, the electric intelligent control device also comprises an electric control element and a plurality of electric sensors electrically connected with the electric control element,
and the electric sensors are arranged on the motor, the hydraulic control valve group, the oil suction tank and the oil return tank.
Further, the electric intelligent control device comprises a motor overload sensor, an oil product sensor and a pressure sensor;
the electric intelligent control device determines whether to early warn according to the hydraulic oil real-time information acquired by the electric sensor, and sends early warn information when the early warn is needed
Compared with the prior art, the water cooling system has the beneficial effects that the temperature of hydraulic oil and the temperature of circulating water before cooling are monitored in real time by using the first temperature detection module and the third temperature detection module, and through accurate calculation, the proper water circulation speed with good heat dissipation effect and capable of maintaining stable operation of the water cooling system is determined. The innovative design provides accurate parameters for the system, can ensure that the water cooling system operates in an optimal mode, and keeps the temperature of hydraulic oil in a proper range, thereby improving the efficiency and the reliability of the system.
Further, the temperature of the cooled hydraulic oil and the temperature of the circulating water are monitored in real time through the second temperature detection module and the fourth temperature detection module. By accurately acquiring the data, the invention can ensure whether the adjusted hydraulic oil temperature meets the standard requirement or not, and can quickly adjust the circulating water speed according to the actual situation. The intelligent regulation and control system can timely respond to temperature change, and ensures real-time adjustment of the circulating water speed, so that the reasonable temperature of hydraulic oil is maintained, the working efficiency and stability of the system are improved, and optimized energy utilization is realized.
Further, according to the preset initial circulating water temperature, the corresponding water speed range and all corresponding speed values are predetermined. By monitoring the water speed in real time, the invention can accurately correct the water speed and timely regulate and control the water cooling system. The intelligent regulation and control system enables hydraulic oil to be kept in a low-temperature state continuously, ensures continuous cyclic utilization of the hydraulic oil, improves energy utilization efficiency, and ensures stable operation of the system. Through the innovative design, the invention realizes the accurate control of the water cooling system, provides a continuous low-temperature environment for hydraulic oil, and improves the reliability and performance of the system.
Drawings
FIG. 1 is a schematic diagram of an intelligent digital cryogenic hydraulic system according to the present invention;
FIG. 2 is a schematic rear view of a frame structure of the intelligent digital low temperature hydraulic system of the present invention;
FIG. 3 is a schematic view of the structure of the intelligent digital low-temperature hydraulic system under the frame;
fig. 4 is a schematic diagram of a temperature detection module of the intelligent digital low-temperature hydraulic system according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an intelligent digital low-temperature hydraulic system according to an embodiment of the invention; FIG. 2 is a schematic rear view of a rack structure of the intelligent digital low-temperature hydraulic system according to the embodiment of the invention; FIG. 3 is a schematic view of the structure of the lower part of a frame of the intelligent digital low-temperature hydraulic system according to the embodiment of the invention; fig. 4 is a schematic diagram of a temperature detection module of the intelligent digital low-temperature hydraulic system according to an embodiment of the invention.
The invention discloses an intelligent digital low-temperature hydraulic system, which comprises:
the hydraulic control system comprises a frame 1, a motor 11, a hydraulic pump 12 and a hydraulic control valve group 13 are arranged above the frame, and an oil suction tank 14, an oil return tank 15, a water cooling system 16 for cooling hydraulic oil and an electric intelligent control device 17 for controlling the operation of the hydraulic system, the hydraulic oil temperature control circulation system and the water cooling system are arranged below the frame;
the electric intelligent control device 17 controls the motor 11 to rotate so as to drive the hydraulic pump 12, the hydraulic pump 12 discharges the hydraulic oil sucked from the oil suction tank 14 into pressure oil and leads the pressure oil to flow to the hydraulic control valve group 13, the pressure oil becomes low-pressure high-temperature hydraulic oil after the hydraulic control valve group 13 works, and then the hydraulic oil flows to the oil return tank 15 from the oil outlet of the hydraulic control valve group 13,
the oil return tank 15 conveys the low-pressure high-temperature hydraulic oil to the water cooling system 16, the hydraulic oil is cooled into low-pressure low-temperature hydraulic oil in the water cooling system 16, and then the low-pressure low-temperature hydraulic oil is conveyed to the oil suction tank 14 for the hydraulic pump 12 to use again, and the hydraulic oil of the whole hydraulic system can be in a low-temperature safe state;
a first temperature detector 181, disposed at a pipe orifice of the oil suction tank 14, for detecting a temperature of hydraulic oil before cooling;
a second temperature detector 182, disposed at the pipe orifice of the oil return tank 15, for detecting the temperature of the cooled hydraulic oil;
a third temperature detector 183 disposed at the outlet of the water cooling system 16 for detecting an initial temperature of the circulating water;
a fourth temperature detector 184, disposed at the inlet of the water cooling system 16, for detecting the single cycle end temperature of the circulating water;
the electric intelligent control device 17 calculates a theoretical water circulation speed according to the temperature of the hydraulic oil before cooling detected by the first temperature detector 181 and the temperature of the water before cooling detected by the third temperature detector 183 and analyzes whether the water cooling system 16 needs to be controlled to adjust the circulation water flow speed;
the electric intelligent control device 17 analyzes whether the water cooling system 16 needs to be controlled to adjust the circulating water flow speed according to the temperature of the cooled hydraulic oil detected by the second temperature detector 182 and the temperature of the cooled water detected by the fourth temperature detector 184;
the electric intelligent control device 17 corrects the speed of the circulating water flow in the water cooling system 16 according to the temperature of the hydraulic oil before cooling detected by the first temperature detector 181 in real time and the initial temperature of the circulating water in the water cooling system 16 detected by the third temperature detector 183 in real time.
The water cooling system 16 includes:
a water pump 161 for controlling the circulation speed of water in the water cooling system 16;
the refrigeration module 162 is connected with the water pump 161 and is used for reducing the temperature of water in the water cooling system;
the electrical intelligent control device 17 further comprises an electrical control element and a plurality of electrical sensors electrically connected with the electrical control element,
the electric sensors are arranged on the motor 11, the hydraulic control valve group 13, the oil suction tank 14 and the oil return tank 15, and comprise a motor overload sensor 171, an oil product sensor 172 and a pressure sensor 173;
the electric intelligent control device 17 determines whether to early warn according to the real-time information of the hydraulic oil acquired by the electric sensor, and sends early warning information when the early warn is needed.
The first temperature detection module 181 detects an initial temperature of the hydraulic oil entering the area of the water cooling system 16, the electrical intelligent control device 17 detects an initial circulating water temperature T 'in the water cooling system through the obtained temperature T1, the third temperature detection module 183 calculates a theoretical circulating water flow speed VL, vl=r× (T1-T1'), where r=m×c/(ρw×a), where m is a mass flow rate of the hydraulic oil, C is a heat capacity of the hydraulic oil, ρw is a density of the water, a is a cross-sectional area of a water cooling system pipe, the theoretical circulating water flow speed VL is compared with a circulating water flow speed range (Vmin, vmax) preset by the electrical intelligent control device 17, where Vmin is a minimum value in the circulating water flow speed range preset by the electrical intelligent control device 17, vmax is a maximum value in the circulating water flow speed range preset by the electrical intelligent control device 17,
if Vmin is less than or equal to VL and less than or equal to Vmax, the water cooling system 16 circulates water at the theoretical circulating water flow speed VL;
if VL < Vmin, the water cooling system 16 starts a cooling module, and reduces the water temperature in the water cooling system 16 to T2', and the electrical intelligent control device 17 calculates a theoretical circulating water flow velocity VL', VL '=r× (T2-T2') according to the temperature T2 acquired again by the first temperature detection module 181 and the temperature T2 acquired again by the third temperature detection module 181;
when Vmin is less than or equal to VL ' and less than or equal to Vmax, the cooling module 162 stops cooling, and the water cooling system keeps the adjusted water temperature T2' and the theoretical circulating water flow speed VL ' to circulate water;
if VL > Vmax, the water cooling system 16 stops working, and the electric intelligent control device 17 calculates a theoretical circulating water flow speed VL ", VL" =vl+r× (T3-T3 ') according to the temperature T3 acquired again by the first temperature detection module 181 and the temperature T3' acquired again by the third temperature detection module 181;
when Vmin is less than or equal to VL ". Ltoreq.Vmax, the water cooling system 16 maintains the adjusted theoretical circulating water flow velocity VL" for water circulation.
According to the invention, the temperature of hydraulic oil and the temperature of circulating water before cooling are monitored in real time by using the first temperature detection module and the third temperature detection module, and through accurate calculation, the proper water circulation speed which has a good heat dissipation effect and can maintain the stable operation of the water cooling system is determined. The innovative design provides accurate parameters for the system, can ensure that the water cooling system operates in an optimal mode, and keeps the temperature of hydraulic oil in a proper range, thereby improving the efficiency and the reliability of the system.
The second temperature detection module 182 detects the temperature T at which the hydraulic oil completes cooling in the water cooling system region after the initial operation is stabilized for a period of time, the operation speed is V, v=vl or VL' or VL ", the electric intelligent control device 17 compares the obtained temperature information with a preset temperature range (Tmin, tmax) within the electric intelligent control device 17, the third temperature detection module 183 detects the temperature Tw1 of the water before the cooling of the water cooling system, the fourth temperature detection module 184 detects the temperature Tw2 of the water after the cooling of the water cooling system,
if Tmin is less than or equal to T is less than or equal to Tmax, the water cooling system 16 circulates water at the theoretical circulating water flow speed V;
if T < Tmin, the water cooling system decreases the theoretical water circulation speed V to V1, the second temperature detection module 182 re-detects the cooled temperature T ', and the fourth temperature detection module 184 detects the cooled water temperature Tw2', v1= (Tw 2' -Tw 1) ×r;
when Tmin is less than or equal to T' isless than or equal to Tmax, the water cooling system 16 keeps the theoretical circulating water flow speed V1 after adjustment to perform water circulation;
if T is greater than or equal to Tmax, the water cooling system increases the theoretical water circulation speed V to V2, the second temperature detection module 182 re-detects the cooled temperature T ", and the fourth temperature detection module 184 detects the cooled water temperature Tw2" v2= (tw2 "-Tw 1) x R;
when Tmin is less than or equal to T' isless than or equal to Tmax, the water cooling system 16 keeps the theoretical circulating water flow speed V2 after adjustment to carry out water circulation;
the temperature of the cooled hydraulic oil and the temperature of the circulating water are monitored in real time through the second temperature detection module and the fourth temperature detection module. By accurately acquiring the data, the invention can ensure whether the adjusted hydraulic oil temperature meets the standard requirement or not, and can quickly adjust the circulating water speed according to the actual situation. The intelligent regulation and control system can timely respond to temperature change, and ensures real-time adjustment of the circulating water speed, so that the reasonable temperature of hydraulic oil is maintained, the working efficiency and stability of the system are improved, and optimized energy utilization is realized.
The electric intelligent control device 17 is preset with each VLi (i=1, 2, 3..n) within a range corresponding to (Vmin, vmax) an initial circulating water temperature Ts i (i=1, 2, 3..n) in the water cooling system, the electric intelligent control device 17 analyzes based on the temperature information acquired by the third temperature detection module 183 and the temperature Ts i '(i=1, 2, 3..n) acquired by the first temperature detection module 181, and calculates an actual water circulation speed Vs' based on the temperature information acquired by the electric intelligent control device 17 through the third temperature detection module 183,
the electric intelligent control device 17 corrects VLi (i=1, 2, 3..n) based on Ts i (i=1, 2, 3..n) acquired in real time and the temperature Ts i ' (i=1, 2, 3..n) of the water in the water cooling system 16 detected in real time by the third temperature detection module 183, calculates corrected speeds Vs ', vs ' =r× (Ts i (i=1, 2, 3..n) -Ts i (i=1, 2, 3..n) ') to ensure Vmin is smaller than or equal to Vs ' issmaller than or equal to Vmax.
According to the preset initial circulating water temperature, the corresponding water speed range and all corresponding speed values are preset. By monitoring the water speed in real time, the invention can accurately correct the water speed and timely regulate and control the water cooling system. The intelligent regulation and control system enables hydraulic oil to be kept in a low-temperature state continuously, ensures continuous cyclic utilization of the hydraulic oil, improves energy utilization efficiency, and ensures stable operation of the system. Through the innovative design, the invention realizes the accurate control of the water cooling system, provides a continuous low-temperature environment for hydraulic oil, and improves the reliability and performance of the system.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intelligent digital cryogenic hydraulic system, comprising:
the hydraulic control system comprises a frame, a motor, a hydraulic pump and a hydraulic control valve group are arranged above the frame, and an oil suction tank, an oil return tank, a water cooling system for cooling hydraulic oil and an electric intelligent control device for controlling the hydraulic system, the hydraulic oil temperature control circulating system and the water cooling system;
the electric intelligent control device controls the motor to rotate so as to drive the hydraulic pump, the hydraulic pump discharges the hydraulic oil sucked from the oil suction box into pressure oil and enables the pressure oil to flow to the hydraulic control valve group, the pressure oil becomes low-pressure high-temperature hydraulic oil after the hydraulic control valve group works, then the hydraulic oil flows to the oil return box from the oil outlet of the hydraulic control valve group,
the oil return tank conveys the low-pressure high-temperature hydraulic oil into the water cooling system, the low-pressure low-temperature hydraulic oil is cooled in the water cooling system and then conveyed into the oil suction tank for reuse by the hydraulic pump, and the hydraulic oil of the whole hydraulic system can be in a low-temperature safe state;
the first temperature detector is arranged at the pipe orifice of the oil suction tank and used for detecting the temperature of hydraulic oil before cooling;
the second temperature detector is arranged at the pipe orifice of the oil return tank and used for detecting the temperature of the cooled hydraulic oil;
the third temperature detector is arranged at the outlet of the water cooling system and used for detecting the initial temperature of circulating water in the water cooling system;
the fourth temperature detector is arranged at the inlet of the water cooling system and is used for detecting the single cycle ending temperature of the circulating water in the water cooling system;
the electric intelligent control device calculates a theoretical water circulation speed according to the temperature of the hydraulic oil before cooling detected by the first temperature detector and the temperature of the water before cooling detected by the third temperature detector and analyzes whether the water cooling system needs to be controlled to adjust the circulation water flow speed;
the electric intelligent control device analyzes whether the water cooling system is required to be controlled to adjust the circulating water flow speed according to the temperature of the cooled hydraulic oil detected by the second temperature detector and the temperature of the cooled water detected by the fourth temperature detector;
and the electric intelligent control device corrects the speed of the circulating water flow regulated by the water cooling system according to the temperature of the hydraulic oil before cooling detected by the first temperature detector in real time and the initial temperature of the circulating water in the water cooling system detected by the third temperature detector in real time.
2. The intelligent digital cryogenic hydraulic system of claim 1, wherein,
the first temperature detection module detects the initial temperature of the hydraulic oil entering the water cooling system area, the electric intelligent control device calculates the theoretical circulating water flow speed in the water cooling system through the acquired temperature information, compares the theoretical circulating water flow speed with the circulating water flow speed range preset by the electric intelligent control device,
if the theoretical circulating water flow speed is smaller than the minimum value of the speed in the preset circulating water flow speed range, starting a refrigerating module, and reducing the water temperature in the water cooling system until the theoretical circulating water flow speed calculated by the electric intelligent control device according to the acquired temperature information is in the preset circulating water flow speed range, wherein the water cooling system keeps the adjusted water temperature and the theoretical circulating water flow speed for water circulation;
if the theoretical circulating water flow speed is greater than the maximum speed of the circulating water flow speed range preset by the electric intelligent control device, the water cooling system stops working until the theoretical circulating water flow speed calculated by the electric intelligent control device according to the temperature information acquired again by the first temperature detection module is within the circulating water flow speed range preset by the electric intelligent control device, and the water cooling system keeps the adjusted theoretical circulating water flow speed for water circulation.
3. The intelligent digital cryogenic hydraulic system of claim 2, wherein,
and if the theoretical circulating water flow speed is within the circulating water flow speed range preset by the electric intelligent control device, the water cooling system circulates water at the theoretical circulating water flow speed.
4. The intelligent digital cryogenic hydraulic system of claim 3, wherein,
the second temperature detection module detects the temperature of the hydraulic oil after the initial operation is stabilized for a period of time when cooling is completed in the water cooling system area, the fourth temperature detection module detects the temperature of the circulating water at the water inlet of the water cooling system after the initial operation is stabilized for a period of time, the electric intelligent control device compares the acquired temperature information with the preset temperature range in the electric intelligent control device,
if the temperature of the hydraulic oil in the water cooling system area after cooling is smaller than the minimum value of the temperature in the preset temperature range, the water cooling system reduces the theoretical water circulation speed until the temperature of the cooled hydraulic oil is in the preset temperature range;
if the temperature of the hydraulic oil in the water cooling system area after cooling is larger than the maximum value of the temperature range, the water cooling system increases the theoretical water circulation speed until the temperature of the cooled hydraulic oil is within the preset temperature range.
5. The intelligent digital cryogenic hydraulic system of claim 4, wherein,
and if the temperature of the hydraulic oil in the water cooling system area when cooling is completed is within a preset temperature range, the water cooling system circulates water at the theoretical circulating water flow speed.
6. The intelligent digital cryogenic hydraulic system of claim 5, wherein,
the third temperature detection module detects the initial circulating water temperature in the water cooling system, the electric intelligent control device analyzes according to the temperature information acquired by the third temperature detection module and the temperature information acquired by the first temperature detection module, calculates and corrects the actual water circulation speed by the temperature information acquired by the third temperature detection module,
when the water cooling system is initially operated, circulating at a theoretical water circulation speed, the temperature of circulating water obtained in real time by the third temperature detection module corresponds to each theoretical circulating water flow speed in a preset circulating water flow speed range, the electric intelligent control device corrects each theoretical circulating water flow speed in the preset circulating water flow speed range according to the temperature of circulating water obtained in real time and the temperature of water in the water cooling system detected in real time by the third temperature detection module, temperature information is detected again, the corrected actual circulating water flow speed is calculated, and the corrected actual circulating water flow speed is ensured to be in the preset circulating water flow speed range.
7. The intelligent digital cryogenic hydraulic system of claim 6, wherein,
the electric intelligent control device is preset with each speed value in the theoretical range of the preset water circulation speed corresponding to the initial circulating water temperature in the water cooling system, analyzes according to the temperature information acquired by the third temperature detection module and the temperature acquired by the first temperature detection module, calculates the actual water circulation speed according to the temperature information acquired by the electric intelligent control device through the third temperature detection module,
the electric intelligent control device corrects the actual water circulation speed according to the temperature of the water in the water cooling system obtained in real time and detected by the third temperature detection module, calculates the temperature information, calculates the corrected speed, and ensures that the corrected speed is within the preset theoretical water circulation range.
8. The intelligent digital cryogenic hydraulic system of claim 7, wherein the water cooling system comprises:
the water pump is used for controlling the circulation speed of water in the water cooling system;
and the refrigeration module is connected with the water pump and used for reducing the temperature of water in the water cooling system.
9. The intelligent digital cryogenic hydraulic system of claim 8, wherein the electrical intelligent control device further comprises an electrical control element and a plurality of electrical sensors electrically connected to the electrical control element,
and the electric sensors are arranged on the motor, the hydraulic control valve group, the oil suction tank and the oil return tank.
10. The intelligent digital cryogenic hydraulic system of claim 9, wherein the electrical intelligent control device comprises a motor overload sensor, an oil sensor, and a pressure sensor;
and the electrical intelligent control device determines whether to early warn according to the real-time information of the hydraulic oil acquired by the electrical sensor, and sends out early warning information when the early warn is needed.
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| JP2007106289A (en) * | 2005-10-14 | 2007-04-26 | Komatsu Ltd | Cooling device of construction machinery |
| JP2010065544A (en) * | 2008-09-08 | 2010-03-25 | Denso Corp | Hydraulic fluid temperature control system |
| CN101817155A (en) * | 2010-04-07 | 2010-09-01 | 丁健 | Intelligent water-cooled hydraulic punching and shearing machine |
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