CN111536087B - Hydraulic oil temperature control system and control method - Google Patents
Hydraulic oil temperature control system and control method Download PDFInfo
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- CN111536087B CN111536087B CN202010363501.1A CN202010363501A CN111536087B CN 111536087 B CN111536087 B CN 111536087B CN 202010363501 A CN202010363501 A CN 202010363501A CN 111536087 B CN111536087 B CN 111536087B
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
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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
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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
- 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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Abstract
The invention provides a hydraulic oil temperature control system and a control method, wherein the hydraulic oil temperature control system comprises a hydraulic oil tank, an oil pump motor set, an overflow valve and an electric heater, wherein the electric heater is arranged on the hydraulic oil tank, the oil pump motor set and the overflow valve are communicated through pipelines in sequence, and an oil return port of the overflow valve is connected with the hydraulic oil tank through a first oil return pipeline. The invention has the beneficial effects that: the hydraulic oil can be prevented from being deteriorated due to the fact that the local temperature of the hydraulic oil is too high during heating, so that the service life of the hydraulic oil is prolonged.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic oil temperature control system and a control method.
Background
In recent years, domestic infrastructure has rapidly developed, and engineering machinery is indispensable in engineering construction as a main machine tool for construction. With the wide application of hydraulic technology, some hydraulic systems in cold areas and aerospace often work at a temperature below zero or even lower, the minimum working temperature of some systems is required to reach-60 ℃, and under a low-temperature working condition, the fluidity of the hydraulic system is poor due to the fact that the viscosity of hydraulic oil is increased, the hydraulic pump is easily caused to suck air in the oil suction process to damage the hydraulic pump, and filters in the system are easily blocked to generate an alarm.
On engineering machinery, traditional temperature control mode sets up an solitary heater in the oil tank, under the too low circumstances of oil temperature, carry out heating control to hydraulic oil, make the temperature of hydraulic oil reach reasonable scope, carry out the use of hydraulic oil again, set up the heating mode of single heater, when heating hydraulic oil, if need heating hydraulic oil to higher temperature, it is uneven to make the oil be heated easily, local high temperature appears, cause the oil to go bad, accelerate the oil emulsification, and then reduce fluid life, lead to hydraulic component performance impaired, moreover, this heating mode heat conduction time is long, heating efficiency is low.
Disclosure of Invention
The invention solves the problem of how to prevent the situation of deterioration caused by the too high local temperature of the hydraulic oil when the hydraulic oil is heated so as to prolong the service life of the hydraulic oil.
In order to solve the problems, the invention provides a hydraulic oil temperature control system, which comprises a hydraulic oil tank, an oil pump motor set, an overflow valve and an electric heater, wherein the electric heater is arranged on the hydraulic oil tank, the oil pump motor set and the overflow valve are communicated through pipelines in sequence, and an oil return port of the overflow valve is connected with the hydraulic oil tank through a first oil return pipeline.
Further, the hydraulic oil tank further comprises a reversing valve, an oil inlet of the reversing valve is communicated with a pipeline between the oil pump motor unit and the overflow valve, and an oil outlet of the reversing valve is connected with the hydraulic oil tank through a second oil return pipeline.
Further, the reversing valve further comprises a pressure measuring connector, and the pressure measuring connector is connected with the working port of the reversing valve.
Further, the oil pump motor unit, the radiator and the oil inlet of the reversing valve are communicated through pipelines in sequence.
Further, the device also comprises a first oil return branch, one end of the first oil return branch is connected with the first oil return pipeline, and the other end of the first oil return branch is suitable for being connected with an executing mechanism.
Further, the oil pump motor unit is connected with an oil tank oil outlet of the hydraulic oil tank through a pipeline, the electric heater is positioned at one end, close to the oil tank oil outlet, of the hydraulic oil tank, and an oil return port of the overflow valve is connected with the other end, far away from the oil tank oil outlet, of the hydraulic oil tank through a first oil return pipeline.
The invention has the beneficial effects that: the hydraulic oil flowing out of the hydraulic oil tank can be led into the overflow valve to carry out overflow heating under the action of the oil pump motor unit, under the normal condition, the overflow heating power is larger, when the oil temperature of the hydraulic oil needs to be heated to a higher temperature, the hydraulic oil with larger volume in the hydraulic oil tank can be heated through the action of the pipeline and the oil pump motor unit, when the hydraulic oil flows through the overflow valve, the hydraulic oil flowing through the pipeline can be sequentially heated under the certain hydraulic oil flow, the condition of uneven heating caused by directly arranging the heating mechanism in the hydraulic oil tank is prevented, the hydraulic oil of the whole hydraulic oil tank is heated uniformly, the heating time is greatly shortened, the hydraulic oil flows back into the hydraulic oil tank through the first oil return pipeline after being overflowed and heated through the overflow valve, and is mixed with the hydraulic oil in the hydraulic oil tank, and the hydraulic oil can be continuously fed into the overflow valve through the pipeline and the oil pump motor unit to carry out circulation heating.
The invention also provides a hydraulic oil temperature control method, which is based on the hydraulic oil temperature control system and comprises the following steps:
acquiring the temperature of hydraulic oil in a hydraulic oil tank;
and controlling an oil pump motor unit and an electric heater according to the temperature of the hydraulic oil so as to overflow and heat the hydraulic oil or preset low-power electric heating.
The hydraulic oil temperature control method of the invention has similar beneficial effects to the hydraulic oil temperature control system compared with the prior art, and is not described in detail herein.
Further, the controlling the oil pump motor set and the electric heater according to the hydraulic oil temperature includes:
when the temperature of the hydraulic oil is smaller than a first preset temperature, controlling the electric heater to start and controlling the oil pump motor unit to be turned off, so that the hydraulic oil is electrically heated at the preset low power through the electric heater;
when the temperature of the hydraulic oil reaches the first preset temperature, the electric heater is controlled to be turned off, and the oil pump motor unit is controlled to be started, so that the hydraulic oil overflows and heats through the overflow valve;
and when the temperature of the hydraulic oil reaches a second preset temperature, controlling the oil pump motor unit to be turned off so as to stop heating the hydraulic oil, wherein the second preset temperature is higher than the first preset temperature.
Further, the hydraulic oil temperature control system further comprises a reversing valve, an oil inlet of the reversing valve is communicated with a pipeline between the oil pump motor unit and the overflow valve, and an oil outlet of the reversing valve is connected with the hydraulic oil tank through a second oil return pipeline; and controlling the oil pump motor unit and the electric heater according to the temperature of the hydraulic oil, wherein the oil pump motor unit and the electric heater further comprise:
when the hydraulic oil temperature reaches the first preset temperature, the electric heater is controlled to be turned off, the oil pump motor unit is controlled to be started, and meanwhile, the oil outlet of the reversing valve is controlled to be communicated with the second oil return pipeline;
acquiring the running time of the oil pump motor set after the hydraulic oil temperature reaches the first preset temperature;
and when the running time reaches the preset running time, controlling the oil outlet of the reversing valve to be closed with the second oil return pipeline.
Further, the hydraulic oil temperature control system further comprises a radiator, and the oil pump motor group, the radiator and the oil inlet of the reversing valve are sequentially communicated through pipelines; further comprises: when the temperature of the hydraulic oil reaches a third preset temperature, the radiator and the oil pump motor unit are controlled to be started, and the oil outlet of the reversing valve is controlled to be communicated with the second oil return pipeline, wherein the third preset temperature is higher than the second preset temperature.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic oil temperature control system according to an embodiment of the present invention;
fig. 2 is a flowchart of a hydraulic oil temperature control method according to an embodiment of the present invention.
Reference numerals illustrate:
1-a hydraulic oil tank; 2-an oil pump motor unit; 3-overflow valve; 4-reversing valve; 5-an electric heater; 6-a first oil return pipeline; 7-a second oil return pipeline; 8-a heat sink; 9-a first oil return branch; 10-an air cleaner; 11-pressure measuring joint; 12-a temperature sensor; 13-ball valve.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It is noted that the terms "first," "second," and the like in the description and claims of the invention and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Referring to fig. 1, the invention provides a hydraulic oil temperature control system, which comprises a hydraulic oil tank 1, an oil pump motor set 2, an overflow valve 3 and an electric heater 5, wherein the electric heater 5 is arranged on the hydraulic oil tank 1, the oil pump motor set 2 and the overflow valve 3 are sequentially communicated through pipelines, and an oil return port of the overflow valve 3 is connected with the hydraulic oil tank 1 through a first oil return pipeline 6.
In the related art, the temperature control mode is to set up an independent heater in the oil tank, under the condition that the oil temperature is too low, carry out heating control to hydraulic oil, make the temperature of hydraulic oil reach reasonable scope, carry out the use of hydraulic oil again, set up the heating mode of single heater, when heating hydraulic oil, if need heating hydraulic oil to higher temperature, it is uneven to make the oil be heated easily, local high temperature appears, cause the oil to go bad, accelerate the oil emulsification, and then reduce fluid life, lead to hydraulic component performance impaired, moreover, this heating mode heat conduction time is long, heating efficiency is low.
Based on this, the embodiment of the invention provides a hydraulic oil temperature control system, wherein a hydraulic oil tank 1, an oil pump motor set 2 and an overflow valve 3 are sequentially communicated through pipelines, wherein the hydraulic oil tank 1 is connected with the oil pump motor set 2 through a pipeline, a ball valve 13 can be arranged between the hydraulic oil tank 1 and the oil pump motor set 2, specifically, the ball valve 13 is respectively connected with the hydraulic oil tank 1 and the oil pump motor set 2 through pipelines, so as to adjust the oil quantity of hydraulic oil flowing into the oil pump motor set 2 from the hydraulic oil tank 1 to a certain extent, the hydraulic oil flowing out of the hydraulic oil tank can be led into the overflow valve 3 for overflow heating under the action of the oil pump motor set 2, under the normal condition, the overflow heating power is larger, when the oil temperature of the hydraulic oil needs to be heated to a higher temperature, the hydraulic oil with a larger volume in the hydraulic oil tank 1, through the action of the pipeline and the oil pump motor unit 2, when the hydraulic oil flows through the overflow valve 3, the flowing hydraulic oil is heated in sequence under a certain hydraulic oil flow, the condition of uneven heating caused by the arrangement of a heating mechanism in the hydraulic oil tank 1 is prevented, the whole hydraulic oil in the hydraulic oil tank is heated uniformly, the heating time is greatly shortened, wherein the hydraulic oil flows back into the hydraulic oil tank 1 through the first oil return pipeline 6 after being overflowed and heated through the overflow valve 3, specifically, the hydraulic oil flows out of the oil return port of the overflow valve 3, in the embodiment, the oil return port of the overflow valve 3 represents the hydraulic oil outlet of the overflow valve 3, so as to return the hydraulic oil through the pipeline connected with the hydraulic oil tank 1, specifically, the hydraulic oil flows back into the hydraulic oil tank 1 through the first oil return pipeline 6, so as to be mixed with the hydraulic oil in the hydraulic oil tank 1, and can continuously enter the overflow valve 3 through the pipeline and the oil pump motor unit 2 for circulating heating.
Under the low temperature condition, the viscosity of hydraulic oil in the hydraulic oil tank 1 is high, if the oil pump motor unit 2 is directly started, the suction effect is easily caused, and therefore, the hydraulic pump is damaged, in the embodiment of the invention, the electric heater 5 is arranged on the hydraulic oil tank 1, the electric heater 5 can be flexibly adjusted so as to enable low-power electric heating, a specific heating part of the electric heater is positioned in the hydraulic oil tank 1, therefore, when the temperature of the hydraulic oil in the hydraulic oil tank 1 is low, the electric heater 5 can be used for heating the hydraulic oil at the low temperature, the heating process aims at preheating the starting of the oil pump motor unit 2, the heating at the low power can not cause uneven heating of the oil in the hydraulic oil tank 1, the situation that the local temperature is too high, and the oil is deteriorated is caused, so that the electric heater 5, the oil pump motor unit 2 and the overflow valve 3 are matched for heating, the heating control is reasonably carried out on the temperature of the hydraulic oil, the problem that the hydraulic oil temperature is not heated when the heating is not equal is avoided, the hydraulic oil is prevented from being deteriorated, the service life of the hydraulic oil is prolonged, and the heating efficiency of the hydraulic oil is improved.
In an alternative embodiment of the invention, the hydraulic oil pump further comprises a reversing valve 4, an oil inlet of the reversing valve 4 is communicated with a pipeline between the oil pump motor set 2 and the overflow valve 3, and an oil outlet of the reversing valve 4 is connected with the hydraulic oil tank 1 through a second oil return pipeline 7.
When overflow heating is performed through the overflow valve 3, if all hydraulic oil entering the oil pump motor unit 2 is directly subjected to overflow heating through the overflow valve 3, because the overflow heating power is high, related drivers, such as a motor, are easily damaged due to excessive current at the moment of starting, therefore, when the high-power overflow circulation heating mode is switched, low-load starting is required, normally, the heating power of the overflow valve is regulated through pressure and flow, when the pressure and flow are low, the heating power is relatively low, the load is low, the reversing valve 4 is further included, the oil inlet of the reversing valve 4 is communicated with a pipeline between the oil pump motor unit 2 and the overflow valve 3, normally, the reversing valve 4 is provided with a medium inlet and a medium outlet, and the oil way of the medium is regulated through a valve core in the regulating valve, in this embodiment, the oil outlet of the reversing valve 4 is a medium outlet of the reversing valve to conduct guiding of hydraulic oil, so that the hydraulic oil flows back to the hydraulic oil tank through the second oil return pipeline 7, correspondingly, the oil inlet of the reversing valve 4 is a medium inlet of the reversing valve in this embodiment, so that the hydraulic oil flows in, when overflow heating is conducted, the hydraulic oil enters the oil suction port of the oil pump motor unit 2 through the ball valve 13 and flows out of the oil outlet of the oil pump motor unit 2, at this time, the reversing valve 4 can be adjusted, the reversing valve 4 in this embodiment can be selected as a two-position four-way electromagnetic reversing valve, so that the oil outlet of the oil pump motor unit 2 can be split and decompressed through the reversing valve 4 and corresponding pipelines, so that the hydraulic oil can flow back to the hydraulic oil tank 1 through the second oil return pipeline 7, correspondingly, the flow of the hydraulic oil flowing in the overflow valve 3, the pressure is smaller, so that the overflow valve 3 is heated under low load, the current of a driving motor of the overflow valve 3 is small, and the problem of motor damage can be better avoided.
In an alternative embodiment of the invention, the pressure measuring joint 11 is further included, and the pressure measuring joint 11 is connected with the working port of the reversing valve 4.
In this embodiment, a pressure measuring connector 11 is further provided and connected to the working port of the reversing valve 4, where the working port is a medium outlet of the reversing valve 4, so that the pressure of the corresponding hydraulic oil can be detected through the medium outlet by externally connecting the pressure measuring connector 11 with the pressure measuring mechanism, and when the reversing valve 4 is selected to be a two-position four-way electromagnetic reversing valve, the pressure measuring connector 11 is specifically connected to the working port of the reversing valve 4 by a pipeline, as shown in fig. 1, the pressure measuring connector 11 is specifically connected to the working port of the reversing valve 4, so that the pressure measuring mechanism can be used for measuring the pressure of the hydraulic oil, so that the flow rate and the pressure of the hydraulic oil flowing through the overflow valve 3 can be controlled by reasonably adjusting the reversing valve 4, so that the heating is more reasonably controlled, and the temperature of the hydraulic oil is more accurately controlled.
In an alternative embodiment of the present invention, the oil pump motor set 2, the radiator 8 and the oil inlet of the reversing valve 4 are sequentially communicated through a pipeline.
In the related art, some hydraulic systems in high-temperature areas and tunnel construction often work at an environmental temperature of 60 ℃ or higher, under the condition of high temperature, the viscosity of hydraulic oil is reduced, the lubricating performance of the hydraulic oil in a hydraulic element is reduced, the abrasion of the hydraulic element can be accelerated, the oxidation speed of the hydraulic oil is accelerated due to the fact that the oil temperature is too high, and the service life of an oil product is influenced.
In the embodiment of the invention, the oil pump motor unit 2 is connected with the radiator 8 through a pipeline, the radiator 8 is connected with the overflow valve 3 and the oil inlet of the reversing valve 4 through a pipeline, so that the oil pump motor unit 2, the radiator 8 and the oil inlet of the reversing valve 4 are communicated, when overflow heating is carried out through the overflow valve 3, the reversing valve 4 is controlled, so that the flow and the pressure of hydraulic oil entering the overflow valve 3 are regulated to heat, at the moment, the radiator 8 is not started, hydraulic oil only passes through the radiator 8, when the temperature of the hydraulic oil is higher, such as the working environment temperature is higher, the radiator 8 is started, the reversing valve 4 is regulated, so that the hydraulic oil flows into the reversing valve 4 after passing through the radiator 8, and returns to the hydraulic oil tank 1 through the second oil return pipeline 7 from the oil return port of the reversing valve 4, and in the process, the radiator is started, so that the temperature of the hydraulic oil can be reduced, the service life of the hydraulic oil is prolonged, and the ageing of elements in the hydraulic system is reduced.
In the related art, a bypass heat dissipation system is arranged in a hydraulic system, and under the condition of overhigh temperature, hydraulic oil is dissipated, the hydraulic pump and the hydraulic valve are required to be configured for the radiator independently, so that the cost is high, and the economical efficiency is low.
In an alternative embodiment of the present invention, the device further includes a first oil return branch 9, one end of the first oil return branch 9 is connected to the first oil return pipe 6, and the other end of the first oil return branch 9 is adapted to be connected to an actuator.
In this embodiment, the system further includes a first oil return branch 9, where the first oil return line 6 is adapted to connect with an actuator through the first oil return line 6, and hydraulic oil after overflow heating by the overflow valve 3 flows into the hydraulic oil tank 1 through the first oil return line 6 to perform oil return of the hydraulic oil tank 1 and circulation heating, and meanwhile, connects with the actuator through an oil return branch to enable a part of heated hydraulic oil to be utilized, for example, the actuator may be provided with a housing flushing oil path for a low-speed high-torque motor, so that cold oil in a motor housing can be replaced with hot oil through the oil path, damage to the motor is avoided, and utilization rate of energy is improved.
In an alternative embodiment of the present invention, the hydraulic oil tank 1 is further provided with an air filter 10, when the hydraulic system works, the hydraulic oil tank 1 rises or falls at the oil level, air is discharged from inside to outside when the hydraulic system rises, and air is sucked from outside to inside when the hydraulic system falls, so that the hydraulic oil tank 1 is provided with the air filter 10, the sucked air can be filtered, and the air filter 10 can be used as an oil filling port for filling new working oil.
In an alternative embodiment of the present invention, the oil pump motor set 2 is connected to an oil outlet of the hydraulic oil tank 1 through a pipeline, the electric heater 5 is located at one end of the hydraulic oil tank 1 near the oil outlet of the oil tank, and an oil return port of the overflow valve 3 is connected to the other end of the hydraulic oil tank 1 far from the oil outlet of the oil tank through the first oil return pipeline 6.
Referring to fig. 1, in this embodiment, the oil pump motor set 2 is directly connected to the hydraulic oil tank 1 through a pipeline and a ball valve 13, the connection is an oil tank outlet, where the electric heater 5 is located at one end of the hydraulic oil tank 1 near the oil tank outlet, so that the electric heater 5 can heat the hydraulic oil near the oil tank outlet, when the temperature of the hydraulic oil is low, the hydraulic oil is conveniently preheated, the preheated hydraulic oil can be directly pumped by the oil pump motor set 2, damage of the hydraulic pump is prevented, meanwhile, an oil return port of the overflow valve 3 is connected to the other end of the hydraulic oil tank 1 through a first oil return pipeline 6, the end is far away from the oil tank outlet, so that the hydraulic oil heated by the overflow valve 3 enters the region of the hydraulic oil tank 1 through the end, and when the circulation heating process of the hydraulic oil is performed through the overflow valve 3, the hydraulic oil can flow in the hydraulic oil tank 1, so that the heated hydraulic oil and the hydraulic oil stored in the hydraulic oil tank 1 are fully mixed, the heating effect is improved, and the control of the oil temperature is more accurate.
In an alternative embodiment of the present invention, a temperature sensor 12 is provided on the hydraulic oil tank 1 to enable reasonable detection of the temperature of the hydraulic oil in the hydraulic oil tank 1, and to facilitate temperature control.
The detection probe of the temperature sensor 12 is located in the middle part of the hydraulic oil tank 1, so as to detect the hydraulic oil in the middle part of the hydraulic oil tank 1, and the temperature of the hydraulic oil in the middle part of the hydraulic oil tank 1 can relatively accurately represent the overall temperature of the hydraulic oil in the hydraulic oil tank 1, in the above embodiment, the electric heater 5 is located at one end of the hydraulic oil tank 1, which is close to the oil outlet of the oil tank, and the oil return port of the overflow valve 3 is connected with the other end of the hydraulic oil tank 1, which is far away from the oil outlet of the oil tank, through the first oil return pipeline 6, so that the hydraulic oil is fully mixed after flowing back into the hydraulic oil tank 1, so that the oil temperature is not uniform, and the detection probe of the temperature sensor 12 can be located at a position between the oil outlet of the oil tank and the other end, which is far away from the oil outlet of the oil tank, so as to detect the temperature more accurately.
Referring to fig. 2, the invention further provides a hydraulic oil temperature control method, based on the hydraulic oil temperature control system, comprising:
s1, acquiring the temperature of hydraulic oil in a hydraulic oil tank 1;
and S2, controlling the oil pump motor unit 2 and the electric heater 5 according to the temperature of the hydraulic oil so as to overflow and heat the hydraulic oil or preset low-power electric heating.
In this embodiment, based on the above hydraulic oil temperature control system, a hydraulic oil temperature control method is provided, which specifically includes the steps of obtaining the temperature of the hydraulic oil in the hydraulic oil tank 1, in the above embodiment, the temperature detection can be performed according to the temperature sensor 12, so that the temperature of the hydraulic oil can be directly obtained based on the temperature sensor 12, and according to the value of the temperature, whether the temperature of the hydraulic oil accords with the temperature range in which reasonable operation is performed can be judged, so that each mechanism in the opening or closing or adjusting system can be controlled, for example, when the temperature of the hydraulic oil is lower, the temperature of the hydraulic oil needs to be raised, the oil pump motor set 2 and the electric heater 5 can be controlled to be opened at the moment, and when the preheating is needed, the oil pump motor set 2 can be closed only the electric heater 5 to reasonably control each mechanism, thereby reasonably heating the oil temperature.
In an alternative embodiment of the present invention, said controlling the oil pump-motor set 2 and the electric heater 5 according to said hydraulic oil temperature comprises:
when the temperature of the hydraulic oil is smaller than a first preset temperature, controlling the electric heater 5 to be started and controlling the oil pump motor set 2 to be closed so that the hydraulic oil is electrically heated at the preset low power through the electric heater 5;
when the temperature of the hydraulic oil reaches the first preset temperature, controlling the oil pump motor set 2 to start so as to enable the hydraulic oil to overflow and heat through the overflow valve 3;
and when the hydraulic oil temperature reaches a second preset temperature, controlling the oil pump motor unit 2 to be closed so as to stop heating the hydraulic oil, wherein the second preset temperature is higher than the first preset temperature.
In this embodiment, when the hydraulic oil temperature is smaller than the first preset temperature, it indicates that the hydraulic oil temperature is lower, the hydraulic oil needs to be heated, so that the hydraulic oil temperature reaches a value meeting the requirement, and thus the viscosity of the hydraulic oil is reduced, in this process, because the hydraulic oil temperature is too low, when the overflow valve 3 is used for overflow heating, the oil pump motor set 2 may be blocked, therefore, the electric heater 5 can be controlled, so that the electric heater 5 is electrically heated with low power, and thus the hydraulic oil in the hydraulic oil tank 1 is preheated, after the electric heater 5 can be preheated to a certain extent, in this embodiment, when the electric heater 5 is controlled to start to perform the electric heating with low power, the hydraulic oil temperature reaches the first preset temperature, that is, the preheating is finished, at this moment, the oil pump motor set 2 can be controlled to start, so that the hydraulic oil is heated with relatively high power through the overflow valve 3, at this moment, the heating of the hydraulic oil can be more uniform, the situation that the local temperature goes bad and the oil product appears during heating is avoided, in this heating process, the electric heater 5 can be controlled to be closed, and the electric heater 5 can also be continuously opened, the electric heater 5 is controlled, after the electric heater 5 can be heated, when the preset temperature reaches the first preset temperature, that the first preset temperature reaches the preset temperature, that the heating is finished, that the heating of the hydraulic oil is stopped, at the electric heater is stopped, at the moment, when the heating is controlled, and the heating of the hydraulic oil is more accurately, and when the electric heater is controlled, and the heating has reached, and when the heating has reached, and the heating of the hydraulic oil has reached to stop to finish heating, and has been controlled.
In this embodiment, the second preset temperature is greater than the first preset temperature, specifically, the first preset temperature is 5 ℃, the second preset temperature is 30 ℃, and the two preset temperatures can be selected according to practical situations.
In an alternative embodiment of the invention, the hydraulic oil temperature control system further comprises a reversing valve 4, an oil inlet of the reversing valve 4 is communicated with a pipeline between the oil pump motor set 2 and the overflow valve 3, and an oil outlet of the reversing valve 4 is connected with the hydraulic oil tank 1 through a second oil return pipeline 7; the controlling the oil pump motor set 2 and the electric heater 5 according to the hydraulic oil temperature further comprises:
when the hydraulic oil temperature reaches the first preset temperature, the electric heater 5 is controlled to be turned off, the oil pump motor set 2 is controlled to be started, and meanwhile, the oil outlet of the reversing valve 4 is controlled to be communicated with the second oil return pipeline 7;
acquiring the operation time of the oil pump motor set 2 after the hydraulic oil temperature reaches the first preset temperature;
and when the running time reaches the preset running time, controlling the oil outlet of the reversing valve 4 and the second oil return pipeline 7 to be closed.
In the above embodiment, after the hydraulic oil temperature reaches the first preset temperature, overflow heating is performed on the hydraulic oil, when overflow heating is performed through the overflow valve 3, if all hydraulic oil entering the oil pump motor unit 2 is directly subjected to overflow heating through the overflow valve 3, because the overflow heating power is relatively high, related drivers are easy to cause, such as a motor is damaged due to overlarge current at the moment of starting, therefore, when the motor is just switched to a high-power overflow circulation heating mode, low-load starting is required, in the embodiment, when overflow heating is performed, according to the hydraulic oil temperature, the oil pump motor unit 2 and the electric heater 5 are controlled to be closed when the hydraulic oil temperature reaches the first preset temperature, and the oil pump motor unit 2 is controlled to be started, and meanwhile, the oil outlet of the reversing valve 4 is controlled to be conducted with the second oil return pipeline 7, so that the oil inlet of the reversing valve 4 is communicated with the pipeline between the oil pump motor unit 2 and the overflow valve 3, when overflow heating is performed, hydraulic oil enters the oil suction port of the oil pump motor unit 2 through the ball valve 13, and then flows out of the oil pump motor unit 2 from the oil pump motor unit 2, when overflow heating is performed, the hydraulic oil can flow through the reversing valve 4 is controlled to be controlled to reach the first preset temperature, the hydraulic oil is controlled to be closed, and the hydraulic oil can flow through the reversing valve 3 is prevented from flowing into the second oil return pipeline 7, and the overflow valve 3 is damaged, and the problem is avoided, and the hydraulic oil can be damaged, and the overflow valve is reduced, and the problem can be caused, and the overflow valve is avoided.
When the low-load heating is performed, the operation time of the oil pump motor set 2 after the hydraulic oil temperature reaches the first preset temperature is obtained, so that whether the low-load heating process is completed or not and whether the relatively high-load heating process can be performed or not can be judged, when the operation time reaches the preset operation time, the overflow valve 3 can perform relatively high-load heating, at the moment, the oil outlet of the reversing valve 4 and the second oil return pipeline 7 are controlled to be closed, the pressure relief and the throttling of the overflow valve 3 are closed, the flow rate and the pressure of hydraulic oil flowing through the overflow valve 3 are improved, and the high-load and high-power hydraulic oil heating control is performed, so that the heating control of the hydraulic oil is more reasonable and flexible, and damage to internal mechanisms of a system is prevented.
In this embodiment, the preset operation time may be set according to actual situations, which is not limited herein.
In an optional embodiment of the present invention, the hydraulic oil temperature control system further includes a radiator 8, and oil inlets of the oil pump motor unit 2, the radiator 8 and the reversing valve 4 are sequentially communicated through a pipeline; further comprises:
when the temperature of the hydraulic oil is greater than or equal to a third preset temperature, the radiator 8 and the oil pump motor unit 2 are controlled to be started, and the oil outlet of the reversing valve 4 is controlled to be communicated with the second oil return pipeline 7, wherein the third preset temperature is greater than the second preset temperature.
In the above embodiment, the oil pump motor unit 2 is connected with the radiator 8 through a pipeline, the radiator 8 is connected with the overflow valve 3 and the oil inlet of the reversing valve 4 through a pipeline, so that the oil pump motor unit 2, the radiator 8 and the oil inlet of the reversing valve 4 are communicated, when the oil temperature of the hydraulic oil is higher, such as the working environment temperature is higher, particularly, when the oil temperature is higher than or equal to the third preset temperature, the temperature of the hydraulic oil is higher, the radiator 8 can be controlled to be started, the reversing valve 4 can be adjusted, after the hydraulic oil passes through the radiator 8, the hydraulic oil flows into the reversing valve 4 through the second oil return pipeline 7, and flows back into the oil tank 1 from the oil return port of the reversing valve 4, so that the service life of the hydraulic oil can be reduced, and the service life of the hydraulic oil can be controlled, and the hydraulic oil can be aged in the hydraulic system can be controlled.
In this embodiment, the third preset temperature is greater than the second preset temperature, specifically, the third preset temperature is 60 ℃, and the second preset temperature is 30 ℃, so as to determine whether the temperature of the hydraulic oil is too high, and the temperature can also be selected according to practical situations.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (6)
1. The hydraulic oil temperature control method is based on a hydraulic oil temperature control system and is characterized by comprising a hydraulic oil tank (1), an oil pump motor set (2), an overflow valve (3) and an electric heater (5), wherein the electric heater (5) is arranged on the hydraulic oil tank (1), the oil pump motor set (2) and the overflow valve (3) are sequentially communicated through pipelines, and an oil return port of the overflow valve (3) is connected with the hydraulic oil tank (1) through a first oil return pipeline (6): the hydraulic oil temperature control method comprises the following steps:
acquiring the temperature of hydraulic oil in a hydraulic oil tank (1);
according to the temperature of the hydraulic oil, controlling an oil pump motor unit (2) and an electric heater (5) to overflow and heat the hydraulic oil or preset low-power electric heating;
the control of the oil pump motor unit (2) and the electric heater (5) according to the hydraulic oil temperature comprises:
when the temperature of the hydraulic oil is smaller than a first preset temperature, controlling the electric heater (5) to be started and controlling the oil pump motor set (2) to be closed so as to enable the hydraulic oil to be electrically heated with the preset low power through the electric heater (5);
when the temperature of the hydraulic oil reaches the first preset temperature, the electric heater (5) is controlled to be turned off, and the oil pump motor unit (2) is controlled to be started, so that the hydraulic oil overflows and heats through the overflow valve (3);
when the hydraulic oil temperature reaches a second preset temperature, the oil pump motor unit (2) is controlled to be turned off so as to stop heating the hydraulic oil, wherein the second preset temperature is higher than the first preset temperature;
the hydraulic oil temperature control system further comprises a reversing valve (4), an oil inlet of the reversing valve (4) is communicated with a pipeline between the oil pump motor unit (2) and the overflow valve (3), an oil outlet of the reversing valve (4) is connected with the hydraulic oil tank (1) through a second oil return pipeline (7), and the reversing valve (4) is used for shunting and pressure relief of hydraulic oil of a pipeline between the oil pump motor unit (2) and the overflow valve (3).
2. The hydraulic oil temperature control method according to claim 1, characterized in that the controlling the oil pump motor group (2) and the electric heater (5) according to the hydraulic oil temperature further includes:
when the hydraulic oil temperature reaches the first preset temperature, the electric heater (5) is controlled to be turned off, the oil pump motor unit (2) is controlled to be started, and meanwhile, the oil outlet of the reversing valve (4) is controlled to be conducted with a second oil return pipeline (7);
acquiring the running time of the oil pump motor unit (2) after the hydraulic oil temperature reaches the first preset temperature;
when the running time reaches the preset running time, the oil outlet of the reversing valve (4) and the second oil return pipeline (7) are controlled to be closed.
3. The hydraulic oil temperature control method according to claim 2, characterized in that the hydraulic oil temperature control system further comprises a radiator (8), and the oil inlets of the oil pump motor group (2), the radiator (8) and the reversing valve (4) are sequentially communicated through a pipeline; further comprises:
when the temperature of the hydraulic oil reaches a third preset temperature, the radiator (8) and the oil pump motor unit (2) are controlled to be started, and the oil outlet of the reversing valve (4) is controlled to be communicated with the second oil return pipeline (7), wherein the third preset temperature is higher than the second preset temperature.
4. The hydraulic oil temperature control method according to claim 2, further comprising a pressure measuring joint (11), the pressure measuring joint (11) being connected with a working port of the reversing valve (4).
5. The hydraulic oil temperature control method according to claim 1, further comprising a first oil return branch (9), wherein one end of the first oil return branch (9) is connected to the first oil return pipeline (6), and the other end of the first oil return branch (9) is adapted to be connected to an actuator.
6. The hydraulic oil temperature control method according to any one of claims 1-5, characterized in that the oil pump motor group (2) is connected with an oil tank outlet of the hydraulic oil tank (1) through a pipeline, the electric heater (5) is located at one end of the hydraulic oil tank (1) close to the oil tank outlet, and an oil return port of the overflow valve (3) is connected with the other end of the hydraulic oil tank (1) far away from the oil tank outlet through the first oil return pipeline (6).
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| US11920584B2 (en) | 2020-03-12 | 2024-03-05 | American Jereh International Corporation | Continuous high-power turbine fracturing equipment |
| US10961993B1 (en) | 2020-03-12 | 2021-03-30 | American Jereh International Corporation | Continuous high-power turbine fracturing equipment |
| CN114753999A (en) * | 2022-03-10 | 2022-07-15 | 烟台杰瑞石油装备技术有限公司 | Lubrication system |
| CN112648265B (en) * | 2021-01-05 | 2023-11-21 | 中联重科土方机械有限公司 | Heating system for hydraulic system, heating control method and excavator |
| CN113110643A (en) * | 2021-05-18 | 2021-07-13 | 深圳市优界科技有限公司 | Temperature control device and temperature control method thereof |
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| KR20130050051A (en) * | 2011-11-07 | 2013-05-15 | 현대자동차주식회사 | Cooling apparatus for vehicle |
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| GB1239841A (en) * | 1968-10-17 | 1971-07-21 | Porsche K G | A cooling system for the working fluid in hydraulic circuits of vehicles |
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