CN111536087A - Hydraulic oil temperature control system and control method - Google Patents
Hydraulic oil temperature control system and control method Download PDFInfo
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- CN111536087A CN111536087A CN202010363501.1A CN202010363501A CN111536087A CN 111536087 A CN111536087 A CN 111536087A CN 202010363501 A CN202010363501 A CN 202010363501A CN 111536087 A CN111536087 A CN 111536087A
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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, the electric heater is arranged on the hydraulic oil tank, the oil pump motor set and the overflow valve are communicated in sequence through pipelines, 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: can prevent that hydraulic oil from appearing because of hydraulic oil local temperature is too high when the heating, the rotten condition appears to improve the life of hydraulic oil.
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 been rapidly developed, and construction machines are indispensable for construction as main machines and tools for construction. With the wide application of hydraulic technology, hydraulic systems in some 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 the low-temperature working condition of the hydraulic systems, due to the fact that the viscosity of hydraulic oil is increased, the fluidity of the hydraulic systems is poor, the hydraulic pumps are prone to being sucked empty in the oil suction process to cause damage of the hydraulic pumps, and filters in the systems are prone to being blocked to generate alarms.
On the engineering machine tool, traditional temperature control mode sets up an solitary heater in the oil tank, under the condition that the oil temperature is crossed lowly, heat control is carried out 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 heat hydraulic oil to higher temperature, make the oil be heated unevenly easily, local high temperature appears, cause the oil rotten, the emulsification of fluid with higher speed, and then reduce fluid life, lead to the hydraulic component performance impaired, and this heating mode heat conduction time is long, the heating efficiency is low.
Disclosure of Invention
The invention solves the problem of how to prevent the deterioration of the hydraulic oil caused by overhigh local temperature of the hydraulic oil during heating 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 sequentially communicated through pipelines, and an oil return port of the overflow valve is connected with the hydraulic oil tank through a first oil return pipeline.
Furthermore, the hydraulic oil return device further comprises a reversing valve, an oil inlet of the reversing valve is communicated with a pipeline between the oil pump motor set 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 the pressure measuring connector is connected with a working port of the reversing valve.
And the oil pump motor set, the radiator and the oil inlet of the reversing valve are communicated in sequence through a pipeline.
Furthermore, the oil return device also comprises a first oil return branch, wherein 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 actuating mechanism.
Furthermore, the oil pump motor set 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 the first oil return pipeline.
The invention has the beneficial effects that: the hydraulic oil flowing out of the hydraulic oil tank can be guided into the overflow valve to be heated under the action of the oil pump motor set, and under the normal condition, the overflow heating power is large, when the oil temperature of the hydraulic oil needs to be heated to a high temperature, the hydraulic oil with larger volume in the hydraulic oil tank can pass through the pipeline and the action of the oil pump motor group, when the hydraulic oil flows through the overflow valve, the hydraulic oil flowing through is sequentially heated under a certain hydraulic oil flow, the condition of uneven heating caused by directly arranging a heating mechanism in the hydraulic oil tank is prevented, the hydraulic oil in the whole hydraulic oil tank is uniformly heated, the heating time is greatly shortened, wherein the hydraulic oil flows back into the hydraulic oil tank through the first oil return pipeline after being subjected to overflow heating by the overflow valve, the oil is mixed with the hydraulic oil in the hydraulic oil tank and can continuously enter the overflow valve through the pipeline and the oil pump motor set for cyclic 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 set and an electric heater according to the temperature of the hydraulic oil so as to perform overflow heating or preset low-power electric heating on the hydraulic oil.
Compared with the prior art, the hydraulic oil temperature control method and the hydraulic oil temperature control system have the advantages that the beneficial effects are similar, and the description is omitted.
Further, according to the hydraulic oil temperature, controlling an oil pump motor set and an electric heater comprises:
when the temperature of the hydraulic oil is lower than a first preset temperature, controlling the electric heater to start and controlling the oil pump motor set to close so as to enable the hydraulic oil to be electrically heated at a preset low power through the electric heater;
when the temperature of the hydraulic oil reaches the first preset temperature, controlling the electric heater to be closed and controlling the oil pump motor set to be started so as to enable the hydraulic oil to overflow and heat through the overflow valve;
and when the temperature of the hydraulic oil reaches a second preset temperature, controlling the oil pump motor set to be closed so as to stop heating the hydraulic oil, wherein the second preset temperature is higher than the first preset temperature.
Furthermore, the hydraulic oil temperature control system also comprises a reversing valve, an oil inlet of the reversing valve is communicated with a pipeline between the oil pump motor set 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; according to hydraulic oil temperature, control oil pump motor group and electric heater still include:
when the temperature of the hydraulic oil reaches the first preset temperature, controlling the electric heater to be closed, controlling the oil pump motor set to be started, and simultaneously controlling an oil outlet of the reversing valve to be communicated with a 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 and the second oil return pipeline to be closed.
Furthermore, the hydraulic oil temperature control system also comprises a radiator, and the oil pump motor set, the radiator and the oil inlet of the reversing valve are sequentially communicated through a pipeline; further comprising: and when the temperature of the hydraulic oil reaches a third preset temperature, controlling the radiator and the oil pump motor set to start, and controlling the oil outlet of the reversing valve 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.
Description of reference numerals:
1-a hydraulic oil tank; 2-an oil pump motor set; 3-an overflow valve; 4-a reversing valve; 5-an electric heater; 6-a first oil return line; 7-a second oil return line; 8-a radiator; 9-a first oil return branch; 10-an air filter; 11-pressure measuring joint; 12-a temperature sensor; 13-ball valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It is noted that the terms first, second and the like in the description and in the claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or 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 a pipeline, 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 technology, the temperature control mode is that an independent heater is arranged in an oil tank, under the condition that the oil temperature is too low, hydraulic oil is heated and controlled, the temperature of the hydraulic oil reaches a reasonable range, then the hydraulic oil is used, and a single heater heating mode is arranged.
Based on this, the embodiment of the present 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 a pipeline, wherein the hydraulic oil tank 1 is connected to the oil pump motor set 2 through a pipeline, and a ball valve 13 may be disposed between the hydraulic oil tank 1 and the oil pump motor set 2, specifically, the ball valve 13 is respectively connected to the hydraulic oil tank 1 and the oil pump motor set 2 through a pipeline to adjust the oil amount of hydraulic oil flowing into the oil pump motor set 2 from the hydraulic oil tank 1 to a certain extent, hydraulic oil flowing out from the hydraulic oil tank can be guided into the overflow valve 3 for overflow heating under the action of the oil pump motor set 2, under normal conditions, the power for overflow heating is large, when the oil temperature of the hydraulic oil needs to be heated to a high temperature, the hydraulic oil with a large volume in the hydraulic oil tank 1 can pass through the pipeline and the, when the hydraulic oil flows through the overflow valve 3, the hydraulic oil flowing through is sequentially heated under a certain hydraulic oil flow, the condition of uneven heating caused by directly arranging a heating mechanism in the hydraulic oil tank 1 is prevented, the hydraulic oil in the whole hydraulic oil tank is uniformly heated, 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 subjected to overflow heating by the overflow valve 3, specifically, the hydraulic oil flows out from the oil return port of the overflow valve 3, in this embodiment, the oil return port of the overflow valve 3 is the hydraulic oil outlet of the overflow valve 3, so as to connect the hydraulic oil tank 1 through a pipeline for returning the hydraulic oil, wherein, the oil flows back to the hydraulic oil tank 1 through the first oil return pipeline 6 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 set 2 for cyclic heating.
In the embodiment of the invention, an electric heater 5 is arranged on the hydraulic oil tank 1, the electric heater 5 can be flexibly adjusted to enable low-power electric heating to be carried out, and the specific heating part is positioned in the hydraulic oil tank 1, so that low-power heating can be carried out by the electric heater 5 at low temperature, particularly when the temperature of the hydraulic oil in the hydraulic oil tank 1 is low, the heating process aims at preheating the starting of the oil pump motor group 2, the low-power heating can not lead to uneven heating of the oil in the hydraulic oil tank 1, the local temperature is overhigh and the oil is deteriorated, and therefore, the oil pump motor group 2 and the overflow valve 3 are heated in a matched manner through the electric heater 5, with this reasonable heating control to hydraulic oil temperature, avoid hydraulic oil temperature to appear being heated uneven scheduling problem when heating to this prevents that hydraulic oil is rotten, and promotes the life of hydraulic oil, can improve the heating efficiency of hydraulic oil simultaneously.
In an optional embodiment of the invention, the hydraulic oil tank 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 carried out through the overflow valve 3, if all hydraulic oil entering the oil pump motor group 2 is directly subjected to overflow heating through the overflow valve 3, because the overflow heating power is high, related drivers are easily caused, for example, when a motor is started at the moment, the current is too high, so that the motor is damaged, when just switching to a high-power overflow circulating heating mode, low-load starting is required, under the normal condition, the heating power of the overflow valve is regulated through pressure and flow, when the pressure and the flow are low, the heating power is relatively low, so that the load is also low, in the embodiment, the reversing valve 4 is further included, so that an oil inlet of the reversing valve 4 is communicated with a pipeline between the oil pump motor group 2 and the overflow valve 3, under the normal condition, the reversing valve 4 is provided with a medium inlet and a medium outlet, and an oil path of the medium is regulated through regulating a valve, in this embodiment, the oil outlet of the directional valve 4 is a medium outlet of the directional valve to conduct the guiding of the hydraulic oil, and thus the hydraulic oil flows back to the hydraulic oil tank through the second oil return pipeline 7, and accordingly, the oil inlet of the directional valve 4 in this embodiment is a medium inlet of the directional valve to conduct the inflow of the hydraulic oil, when the overflow heating is conducted, the hydraulic oil enters the oil suction port of the oil pump motor set 2 through the ball valve 13 and then flows out from the oil outlet of the oil pump motor set 2, at this time, the directional valve 4 can be adjusted, and in this embodiment, the directional valve 4 can be selected as a two-position four-way electromagnetic directional valve, so that the oil outlet of the oil pump motor set 2 is shunted and decompressed through the directional valve 4 and the corresponding pipeline, and thus the hydraulic oil can flow back to the hydraulic oil tank 1 through the oil return port of the directional valve 4 and then through the second oil, Pressure is all less to this for overflow valve 3 carries out the underload heating, and the driving motor electric current of overflow valve 3 is little, can be better avoid the problem of motor damage.
In an alternative embodiment of the present invention, a pressure measuring connector 11 is further included, and the pressure measuring connector 11 is connected with the working port of the reversing valve 4.
In this embodiment, a pressure measuring connection 11 is also provided, which is connected to the working port of the directional control valve 4, wherein the working port is a medium outlet of the directional control valve 4, therefore, the pressure measuring mechanism which is externally connected with the pressure measuring joint 11 can detect the pressure of the corresponding hydraulic oil through the medium outlet, when the reversing valve 4 is selected to be a two-position four-way electromagnetic reversing valve, the two-position four-way electromagnetic reversing valve is specifically connected with the port B of the reversing valve 4, wherein, referring to fig. 1, specifically, the pressure measuring joint 11 is connected with the working port of the reversing valve 4 through a pipeline, so that a corresponding pressure measuring mechanism can be externally connected through the pressure measuring joint 11, thereby the pressure of the hydraulic oil can be measured by the pressure measuring mechanism, and the flow and the pressure of the hydraulic oil flowing through the overflow valve 3 can be controlled by reasonably adjusting the reversing valve 4, therefore, heating is controlled more reasonably, and the temperature of the hydraulic oil is controlled more accurately.
In an optional embodiment of the invention, the oil pump motor set 2 further comprises a radiator 8, and the radiator 8 and the oil inlet of the reversing valve 4 are sequentially communicated through a pipeline.
In the related art, hydraulic systems in some high-temperature areas and tunnel construction often work at an ambient temperature of 60 ℃ or even higher, under the high-temperature condition, the viscosity of hydraulic oil is reduced, the lubricating performance of the hydraulic oil in hydraulic elements is reduced, the abrasion of the hydraulic elements is accelerated, moreover, the oxidation speed of the hydraulic oil is accelerated due to too high oil temperature, the service life of oil products is affected, and besides, the aging of sealing parts in the hydraulic elements is accelerated due to too high oil temperature, and the sealing performance of the hydraulic elements is reduced.
In the embodiment of the invention, the oil pump motor group 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 group 2, the radiator 8 and the oil inlet of the reversing valve 4 are communicated, when the overflow heating is carried out through the overflow valve 3, the flow and the pressure of the hydraulic oil entering the overflow valve 3 are adjusted by controlling the reversing valve 4 so as to carry out the heating, at the moment, the radiator 8 is not started, the hydraulic oil only passes through the radiator, when the temperature of the hydraulic oil is higher, such as the temperature of a working environment is higher, the radiator 8 is started, the reversing valve 4 is adjusted so that the hydraulic oil passes through the radiator 8 and then flows into the reversing valve 4, and flows back into the hydraulic oil tank 1 through the second oil return pipeline 7 from the oil return port of the reversing valve 4, and the radiator, therefore, the temperature of the hydraulic oil is controlled and reduced, the service life of the hydraulic oil is prolonged, and the aging of elements in a hydraulic system is reduced.
In the correlation technique, set up bypass cooling system in hydraulic system, under the condition of high temperature, dispel the heat to hydraulic oil, this kind of mode needs dispose the hydraulic pump for the radiator alone, the hydrovalve, the cost is higher, the economic nature is not high, in this embodiment, radiator 8 directly sets up on the oil outlet oil way of the oil-out of oil pump motor group 2, can share one set of hydraulic power source with overflow valve 3, oil pump motor group 2, the cost is lower, the economic nature is higher, wherein radiator 8 can adopt motor drive's air-cooled radiator, in order to dispel the heat.
In an alternative embodiment of the present invention, the hydraulic actuator further comprises a first oil return branch 9, one end of the first oil return branch 9 is connected to the first oil return line 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, wherein the first oil return line 6 is adapted to be connected to the actuator through the oil return branch, the hydraulic oil heated by overflowing from the overflow valve 3 flows into the hydraulic oil tank 1 through the first oil return line 6 to perform oil return and cyclic heating of the hydraulic oil tank 1, and meanwhile, the first oil return branch is connected to the actuator through the oil return branch to be able to utilize a part of the heated hydraulic oil, if the actuator is similar to a low-speed high-torque motor and is provided with a housing flushing oil path, a cold oil in a housing of the motor can be replaced by a hot oil through the oil path, thereby preventing the motor from being damaged, and improving the utilization rate of energy.
In an alternative embodiment of the present invention, the hydraulic oil tank 1 is further provided with an air filter 10, and when the hydraulic system works, the hydraulic oil tank 1 rises or falls when the oil level is inside, 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 air filter 10 is mounted on the hydraulic oil tank 1, and the air filter 10 can filter the sucked air, and meanwhile, the air filter 10 can be used as an oil filling port to inject new working oil.
In an optional embodiment of the present invention, the oil pump motor set 2 is connected to 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 to the other end of the hydraulic oil tank 1 far from the oil tank outlet through the first oil return pipeline 6.
Referring to fig. 1, in this embodiment, an oil pump motor set 2 is directly connected to a hydraulic oil tank 1 through a pipeline and a ball valve 13, the connection is an oil outlet of the oil tank, wherein an electric heater 5 is located at one end of the hydraulic oil tank 1 close to the oil outlet of the oil tank, so that the electric heater 5 can heat hydraulic oil near the oil outlet of the oil tank, and preheat the hydraulic oil when the temperature of the hydraulic oil is low, so that the oil pump motor set 2 can directly extract the preheated hydraulic oil to prevent the hydraulic pump from being damaged, meanwhile, an oil return opening of an overflow valve 3 is connected to the other end of the hydraulic oil tank 1 through a first oil return pipeline 6, and the end is far away from the oil outlet of the oil tank, so that the hydraulic oil heated by the overflow valve 3 enters the area of the hydraulic oil tank 1 through the end, and the hydraulic oil can flow in the hydraulic oil tank 1 when the, thereby make the hydraulic oil after the heating and the hydraulic oil of storing in the hydraulic tank 1 carry out intensive mixing, improve the heating effect to this makes the control to the oil temperature more accurate.
In an alternative embodiment of the present invention, a temperature sensor 12 is disposed on the hydraulic oil tank 1 to reasonably detect the temperature of the hydraulic oil in the hydraulic oil tank 1, so as to facilitate temperature control.
Wherein, the detection probe of the temperature sensor 12 is positioned at the middle part in the hydraulic oil tank 1 so as to detect the hydraulic oil at the middle part in the hydraulic oil tank 1, the temperature of the hydraulic oil at 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 near the oil outlet of the oil tank, an oil return port of the overflow valve 3 is connected with the other end of the hydraulic oil tank 1 far away from an oil outlet of the oil tank through the first oil return pipeline 6, after the hydraulic oil flows back into the hydraulic oil tank 1, the hydraulic oil is fully mixed, so that the oil temperature is prevented from being uneven, and at the moment, the detection probe of the temperature sensor 12 can be specifically positioned at the position between the oil outlet of the oil tank and the other end far away from the oil outlet of the oil tank, so that the temperature can be detected more accurately.
Referring to fig. 2, the present invention further provides a hydraulic oil temperature control method, based on the hydraulic oil temperature control system, including:
s1, acquiring the temperature of the hydraulic oil in the hydraulic oil tank 1;
and S2, controlling the oil pump motor set 2 and the electric heater 5 according to the temperature of the hydraulic oil so as to carry out overflow heating or preset low-power electric heating on the hydraulic oil.
In this embodiment, based on the above-mentioned hydraulic oil temperature control system, a hydraulic oil temperature control method is provided, which specifically includes obtaining a hydraulic oil temperature in a hydraulic oil tank 1, the temperature detection may be performed based on the temperature sensor 12 in the above-described embodiment, whereby the hydraulic oil temperature can be directly obtained based on the temperature sensor 12, according to the numerical value of the temperature, whether the temperature of the hydraulic oil meets the temperature range for reasonable work can be judged, thereby enabling the control of the opening or closing or regulation of the various mechanisms in the system, e.g., when the temperature of the hydraulic oil is low and 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 started, when the oil needs to be preheated, the oil pump motor set 2 can be closed, and only the electric heater 5 is started, so that each mechanism is reasonably controlled, and the oil temperature is reasonably heated and controlled.
In an alternative embodiment of the present invention, the controlling the oil pump motor set 2 and the electric heater 5 according to the temperature of the hydraulic oil comprises:
when the temperature of the hydraulic oil is lower 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 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 temperature of the hydraulic oil reaches a second preset temperature, controlling the oil pump motor set 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 temperature of the hydraulic oil is lower than the first preset temperature, which indicates that the temperature of the hydraulic oil is low, the hydraulic oil needs to be heated, so that the temperature of the hydraulic oil reaches a value meeting the requirement, thereby reducing the viscosity of the hydraulic oil, in this process, because the temperature of the hydraulic oil is too low, when the overflow heating is performed through the overflow valve 3, the oil pump motor set 2 may be blocked, so that the electric heater 5 may be controlled to perform low-power electric heating, thereby preheating the hydraulic oil in the hydraulic oil tank 1, after the hydraulic oil can be preheated to a certain extent, in this embodiment, when the electric heater 5 is controlled to start the preset low-power electric heating, when the temperature of the hydraulic oil reaches the first preset temperature, namely the preheating is completed, at this time, the oil pump motor set 2 may be controlled to start the hydraulic oil to perform relatively high-power heating through, the heating of hydraulic oil can be more uniform, the situation that oil products are deteriorated due to overhigh local temperature of the hydraulic oil during heating is avoided, in the overflow heating process, the electric heater 5 can be controlled to be closed, only the overflow valve 3 is used for heating, the electric heater 5 can also be continuously opened for auxiliary heating, when the temperature of the hydraulic oil reaches a second preset temperature, the temperature of the hydraulic oil is indicated to meet the requirement, the oil pump motor set 2 is controlled to be closed at the moment, the hydraulic oil stops heating, and if the electric heater 5 does not stop at present, the heating of the electric heater 5 is stopped at the same time, so that the heating control of the hydraulic oil is completed, and the heating control of the oil temperature is more reasonable and accurate.
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 also be selected according to actual conditions.
In an optional 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; according to hydraulic oil temperature, control oil pump motor group 2 and electric heater 5 still include:
when the temperature of the hydraulic oil reaches the first preset temperature, controlling the electric heater 5 to be closed, controlling the oil pump motor set 2 to be started, and simultaneously controlling an oil outlet of the reversing valve 4 to be communicated with a second oil return pipeline 7;
acquiring the running time of the oil pump motor set 2 after the temperature of the hydraulic oil 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 temperature of the hydraulic oil reaches the first preset temperature, the hydraulic oil is heated by overflowing, and when the overflow heating is performed by the overflow valve 3, if all the hydraulic oil entering the oil pump motor set 2 is directly heated by overflowing through the overflow valve 3, because the power of the overflow heat is large, the related drivers are easily caused, and if the motor is started at the moment, the current is too large, and the motor is damaged, therefore, when the motor is switched to the high-power overflow circulation heating mode, the low-load start is required, in the present embodiment, during the overflow heating, the oil pump motor set 2 and the electric heater 5 are controlled according to the temperature of the hydraulic oil, and when the temperature of the hydraulic oil 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 simultaneously the oil outlet of the reversing valve 4 is controlled to be communicated with the, with this, make the oil inlet of switching-over valve 4 and the pipeline intercommunication between oil pump motor group 2 and the overflow valve 3, when carrying out the overflow heating, hydraulic oil passes through ball valve 13 and gets into the oil absorption mouth of oil pump motor group 2, flow out from the oil-out of oil pump motor group 2 again, the switching-over valve 4 is adjusted to the accessible this moment, the hydraulic oil to influx overflow valve 3 shunts the pressure release, thereby make hydraulic oil can pass through the oil return opening of switching-over valve 4, then flow back to hydraulic tank 1 in through second oil return line 7, at this moment, the hydraulic oil flow that flows in overflow valve 3, pressure is all less, with this, make overflow valve 3 carry out the low-load heating, overflow valve 3's driving motor electric current is little, can be better avoid the problem of motor damage.
When the low-load heating is carried out, the running time of the oil pump motor set 2 is obtained after the hydraulic oil temperature reaches the first preset temperature, so that whether the low-load heating process is finished or not can be judged, whether the heating process with a relatively high load can be carried out or not can be judged, when the running time reaches the preset running time, the overflow valve 3 can be indicated to carry out 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, so that the pressure relief and the throttling of the overflow valve 3 are closed, the flow and the pressure of the hydraulic oil flowing through the overflow valve 3 are improved, and the high-load high-power hydraulic oil heating control is carried out, so that the heating control of the hydraulic oil is more reasonable and flexible, and the damage to an internal machine of the system.
In this embodiment, the preset operation time may be set according to actual conditions, and is not limited herein.
In an optional embodiment of the invention, the hydraulic oil temperature control system further comprises a radiator 8, and oil inlets of the oil pump motor set 2, the radiator 8 and the reversing valve 4 are sequentially communicated through a pipeline; further comprising:
and when the temperature of the hydraulic oil is greater than or equal to a third preset temperature, controlling the radiator 8 and the oil pump motor set 2 to start, and controlling the oil outlet of the reversing valve 4 to be communicated with the second oil return pipeline 7, wherein the third preset temperature is greater than the second preset temperature.
Under the condition of high temperature, when the temperature of the hydraulic oil is higher, the viscosity of the hydraulic oil is reduced, the lubricating performance of the hydraulic oil in a hydraulic element is reduced, the abrasion of the hydraulic element is accelerated, the oxidation speed of the hydraulic oil is accelerated due to overhigh oil temperature, the service life of an oil product is influenced, besides, the aging of a sealing element in the hydraulic element is accelerated due to overhigh oil temperature, and the sealing performance of the hydraulic element is reduced, in the embodiment, the oil pump motor group 2 is connected with the radiator 8 through a pipeline, the radiator 8 is connected with the overflow valve 3 and an oil inlet of the reversing valve 4 through a pipeline, so that the oil inlets of the oil pump motor group 2, the radiator 8 and the reversing valve 4 are communicated, when the temperature of the hydraulic oil is higher, such as the temperature of a working environment, in the embodiment, specifically, when the temperature of the hydraulic oil is greater than or, at this moment, the radiator 8 can be controlled to be started, the reversing valve 4 is adjusted to enable the hydraulic oil to flow into the reversing valve 4 after passing through the radiator 8, and the hydraulic oil flows back into the hydraulic oil tank 1 from the oil return port of the reversing valve 4 through the second oil return pipeline 7.
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 ℃ for determining whether the temperature of the hydraulic oil is too high, and the temperature may also be selected according to actual conditions.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. The utility model provides a hydraulic oil temperature control system, its characterized in that, includes hydraulic tank (1), oil pump motor group (2), overflow valve (3) and electric heater (5), electric heater (5) set up in on hydraulic tank (1), hydraulic tank (1) oil pump motor group (2) with overflow valve (3) loop through the pipeline intercommunication, the oil return opening of overflow valve (3) is connected through first oil return pipeline (6) hydraulic tank (1).
2. The hydraulic oil temperature control system according to claim 1, further comprising a reversing valve (4), wherein 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).
3. The hydraulic oil temperature control system according to claim 2, further comprising a pressure tap (11), wherein the pressure tap (11) is connected to a working port of the directional valve (4).
4. The hydraulic oil temperature control system of claim 2, further comprising a radiator (8), wherein the oil pump motor set (2), the radiator (8) and the oil inlet of the reversing valve (4) are sequentially communicated through a pipeline.
5. The hydraulic oil temperature control system of 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 line (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 system according to any one of claims 1-5, wherein the oil pump motor set (2) is connected to an oil tank 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) close to the oil tank oil outlet, and an oil return port of the overflow valve (3) is connected to the other end of the hydraulic oil tank (1) far away from the oil tank oil outlet through the first oil return pipeline (6).
7. A hydraulic oil temperature control method based on the hydraulic oil temperature control system of any one of claims 1-6, characterized by comprising:
acquiring the temperature of hydraulic oil in a hydraulic oil tank (1);
and controlling an oil pump motor set (2) and an electric heater (5) according to the temperature of the hydraulic oil so as to carry out overflow heating or preset low-power electric heating on the hydraulic oil.
8. The hydraulic oil temperature control method according to claim 7, wherein the controlling an oil pump motor group (2) and an electric heater (5) according to the hydraulic oil temperature includes:
when the temperature of the hydraulic oil is lower 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 at a preset low power through the electric heater (5);
when the temperature of the hydraulic oil reaches the first preset temperature, controlling the electric heater (5) to be closed and controlling the oil pump motor set (2) to be started so as to enable the hydraulic oil to overflow and heat through the overflow valve (3);
when the temperature of the hydraulic oil reaches a second preset temperature, the oil pump motor set (2) is controlled to be closed so that the hydraulic oil stops heating, wherein the second preset temperature is higher than the first preset temperature.
9. The hydraulic oil temperature control method according to claim 8, wherein 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); according to hydraulic oil temperature, control oil pump motor group (2) and electric heater (5) still include:
when the hydraulic oil temperature reaches the first preset temperature, controlling the electric heater (5) to be closed, controlling the oil pump motor set (2) to be started, and simultaneously controlling an oil outlet of the reversing valve (4) to be communicated with a second oil return pipeline (7);
acquiring the running 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.
10. The hydraulic oil temperature control method according to claim 9, wherein the hydraulic oil temperature control system further comprises a radiator (8), and the oil pump motor set (2), the radiator (8) and an oil inlet of the reversing valve (4) are sequentially communicated through a pipeline; further comprising:
and when the temperature of the hydraulic oil reaches a third preset temperature, controlling the radiator (8) and the oil pump motor set (2) to start, and controlling the oil outlet of the reversing valve (4) to be communicated with the second oil return pipeline (7), wherein the third preset temperature is higher than the second preset temperature.
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