Gear Oil Circulation System

Abstract

The gear oil circulation system includes a gear oil pipe connected to each of the first gearbox, the second gearbox, and the third gearbox to provide a path for supplying and discharging gear oil; a gear oil valve disposed on the gear oil pipe to control the movement of gear oil; an oil circulation pump including a gear oil pump disposed on the gear oil pipe to move gear oil; a cooling unit disposed on the gear oil pipe to cool the gear oil discharged to each of the first gearbox, the second gearbox, and the third gearbox; a sensor unit including an oil temperature sensor disposed on each of the first gearbox, the second gearbox, and the third gearbox to detect the temperature of the gear oil; and a control unit that stores the normal oil temperature range of each of the first gearbox, the second gearbox, and the third gearbox, and controls the corresponding gear oil valve, gear oil pump, and cooling unit so that gear oil is discharged and cooled from the corresponding gearbox when the temperature detected by the oil temperature sensor deviates from the normal oil temperature range.

Description

Technology Field

[0001] The present invention relates to a gear oil circulation system, and more specifically, to a gear oil circulation system for cooling heated oil in a gearbox. Background Technology

[0003] Generally, a reduction gear is a device that receives the rotational force of a driving means, reduces it by a predetermined ratio, and outputs it. As part of a power transmission system, such reduction gears are widely applied in various industrial machinery, such as water treatment devices, conveyors, and elevators. In particular, agitators are essential components of numerous pieces of equipment included in water treatment devices, such as agitators, lifting devices, and sludge collectors. Typically, reduction gears used include involute-type reduction gears that utilize involute gears to reduce the rotational force of the driving means by a predetermined ratio, or cycloid reduction gears that utilize cycloid disks to reduce the rotational force of the driving means by a predetermined ratio.

[0004] Meanwhile, recently, the use of cycloidal reducers is increasing because they not only have a high reduction ratio but also have low wear on the torque transmission parts, resulting in a significantly lower failure rate even after prolonged use. Although cycloidal reducers have many advantages as described above, there was a problem in that high heat was generated on the disc box side where the cycloidal disc is installed compared to the involute type reducer. When high heat is generated on the disc box side in this way, the film of the lubricating oil injected into the reducer is destroyed, and due to thermal expansion of internal components, particularly the gear parts, noise and vibration increase during operation. Furthermore, due to the rise in internal temperature of the reducer, excessive heat is transferred through the output shaft of the reducer to sealing systems such as oil seals, causing premature hardening of the sealing systems and significantly shortening their lifespan.

[0005] To improve this, the gear oil was discharged to the outside and cooled to circulate, but since this was not controlled accurately, there is still a problem with the deterioration of the gear oil. Prior art literature

[0007] Republic of Korea Registered Patent No. 10-1360224 Oil Cooling System for Turbo Chillers The problem to be solved

[0008] Therefore, the objective of the present invention is to provide a gear oil circulation system capable of monitoring the temperature of the oil in a three-stage gearbox and stably cooling the heated oil. means of solving the problem

[0010] A gear oil circulation system according to the present invention for achieving the above objective comprises: a gear oil pipe connected to each of the first gearbox, the second gearbox, and the third gearbox to provide a movement path for supplying and discharging gear oil; a gear oil valve disposed on the gear oil pipe to control the movement of gear oil; an oil circulation pump including a gear oil pump disposed on the gear oil pipe to move gear oil; a cooling unit disposed on the gear oil pipe to cool the gear oil discharged to each of the first gearbox, the second gearbox, and the third gearbox; and a sensor unit including an oil temperature sensor disposed on each of the first gearbox, the second gearbox, and the third gearbox to detect the temperature of the gear oil. It includes a control unit that stores the normal oil temperature ranges of each of the first gearbox, the second gearbox, and the third gearbox, and controls the corresponding gear oil valve, the gear oil pump, and the cooling unit so that gear oil is discharged and cooled from the corresponding gearbox when the temperature detected by the oil temperature sensor deviates from the normal oil temperature range. By monitoring the temperature of the gear oil in the first gearbox, the second gearbox, and the third gearbox, and if the temperature deviates from the normal temperature, the gear oil is discharged from the corresponding gearbox, cooled, and circulated to stably control the temperature.

[0011] Here, it is desirable to further include a filtering unit disposed on the gear oil pipe to remove foreign substances from the discharged gear oil, so that foreign substances that may be generated while the gearbox is operating can be removed during the circulation of the gear oil.

[0012] Furthermore, the system further includes a contamination removal circulation unit comprising a gear oil tank disposed downstream of the filtering unit for storing gear oil from which foreign substances have been removed, a circulation pipe connecting the bottom of the gear oil tank to the gear oil pipe upstream of the filtering unit, a circulation valve disposed on the circulation pipe for controlling the movement of gear oil, and a circulation pump disposed on the circulation pipe for moving gear oil; the sensor unit further includes a contamination detection sensor for detecting the contamination level of the gear oil in the gear oil tank; and the control unit stores the normal contamination range of the gear oil in the gear oil tank, and if it is determined that the contamination level of the gear oil in the gear oil tank detected by the contamination detection sensor deviates from the normal contamination range, the system controls the circulation valve and the circulation pump so that the gear oil in the gear oil tank is filtered by the filtering unit, thereby allowing the gear oil discharged from the gearbox and circulated to be circulated so that foreign substances can be repeatedly removed by the filtering unit when the contamination level deviates from the normal contamination level.

[0013] Herein, the system further includes a connecting section comprising a connecting pipe connecting each of the first gearbox, the second gearbox, and the third gearbox, and a connecting valve disposed on the connecting pipe to control the movement of gear oil, and the control section stores the normal oil temperature difference range of the gear oil between the first gearbox, the second gearbox, and the third gearbox, and if it is determined that the temperature difference of the gear oil between the first gearbox, the second gearbox, and the third gearbox according to the temperature detected by the oil temperature sensor deviates from the normal oil temperature difference range, the system controls the corresponding connecting valve, the corresponding gear oil valve, and the oil circulation pump, so that when the temperature difference between the three gearboxes deviates from the normal temperature difference range, the gear oil between the gearboxes can be mixed to quickly resolve the temperature difference, which is desirable.

[0014] Furthermore, the control unit stores the gear oil movement speed and cooling speed according to the degree to which the normal oil temperature deviates from the normal oil temperature range, and controls the gear oil pump and cooling unit so that at least one of the stored gear oil movement speed and cooling speed is executed based on the degree to which the temperature detected by the oil temperature sensor deviates from the normal oil temperature range; this is desirable so that the greater the value of the gear oil temperature deviating from the normal temperature, the greater the gear oil circulation speed and the greater the cooling intensity of the cooling unit, thereby enabling faster cooling. Effects of the invention

[0016] According to the present invention, the temperature of the gear oil in the first gearbox, the second gearbox, and the third gearbox is monitored, and if it deviates from the normal temperature, the gear oil is discharged from the corresponding gearbox, cooled, and circulated, thereby having the effect of stably controlling the temperature.

[0017] In addition, it is effective in removing foreign substances that may be generated during the operation of the gearbox during the circulation of gear oil.

[0018] In addition, if the contamination level of the gear oil discharged and circulated from the gearbox deviates from the normal contamination level, it has the effect of allowing the oil to be circulated so that foreign substances can be repeatedly removed by the filtering unit.

[0019] In addition, if the temperature difference between the three gearboxes exceeds the normal temperature difference range, the gear oil between the gearboxes mixes, which has the effect of quickly resolving the temperature difference.

[0020] In addition, the greater the deviation of the gear oil temperature from the normal temperature, the greater the effect of increasing the circulation speed of the gear oil and increasing the cooling intensity of the cooling section to enable faster cooling. Brief explanation of the drawing

[0022] FIG. 1 is a schematic diagram of a gear oil circulation system of a first gearbox, a second gearbox, and a third gearbox according to the present invention. FIG. 2 is a control block diagram of the gear oil circulation system of the first gearbox, the second gearbox, and the third gearbox. FIG. 3 is a first exemplary diagram of a gear oil circulation system of a first gearbox, a second gearbox, and a third gearbox. Figure 4 is an example diagram of the control conditions of the gear oil circulation system of the first gearbox, the second gearbox, and the third gearbox. Specific details for implementing the invention

[0023] Hereinafter, a gear oil circulation system (1) according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0024] FIG. 1 is a schematic diagram of a gear oil circulation system (1) of a first gearbox, a second gearbox, and a third gearbox according to the present invention, FIG. 2 is a control block diagram of a gear oil circulation system (1) of a first gearbox, a second gearbox, and a third gearbox, FIG. 3 is a first exemplary diagram of a gear oil circulation system (1) of a first gearbox, a second gearbox, and a third gearbox, and FIG. 4 is an exemplary diagram of control conditions of a gear oil circulation system (1) of a first gearbox, a second gearbox, and a third gearbox.

[0025] The configuration of the gear oil circulation system (1) of the first gearbox, the second gearbox, and the third gearbox is explained with reference to FIGS. 1 to 4.

[0026] The gear oil circulation system (1) includes a gear oil pipe (10), a gear oil valve (20), an oil circulation pump (30), a cooling unit (40), a sensor unit (50), a filtering unit (60), a contaminant removal circulation unit (70), a connection unit (80), and a control unit (90).

[0027] The gear oil pipe (10) is connected to each of the first gear box (2), the second gear box (3), and the third gear box (4) to provide a path for supplying and discharging gear oil.

[0028] The gear oil valve (20) is positioned on the gear oil pipe (10) to control the movement of gear oil. The gear oil valve (20) includes a shut-off valve (21) and a selector valve (22).

[0029] A control valve (21) is positioned on the gear oil pipe (10) to control the movement of the gear oil.

[0030] The selection valve (22) is positioned at the branch point of the gear oil pipe (10) to determine the path of the gear oil.

[0031] The oil circulation pump (30) includes a gear oil pump (74) that is positioned on the gear oil pipe (10) to move the gear oil.

[0032] The cooling unit (40) is positioned on the gear oil pipe (10) to cool the gear oil discharged to each of the first gear box (2), the second gear box (3), and the third gear box (4).

[0033] The sensor unit (50) includes an oil temperature sensor (51), a humidity sensor (52), and a contamination detection sensor (53).

[0034] The oil temperature sensor (51) is placed in each of the first gearbox (2), the second gearbox (3), and the third gearbox (4) to detect the temperature of the gear oil. The oil temperature sensor (51) can be placed in the gear oil pipe (10) and the gear oil tank (71) to detect the temperature of the gear oil.

[0035] The humidity sensor (52) can detect the humidity of the gear oil in the gear oil tank (71).

[0036] The contamination detection sensor (53) can detect the contamination level of the gear oil in the gear oil tank (71).

[0037] The filtering unit (60) is positioned on the gear oil pipe (10) and can remove foreign substances from the discharged gear oil. The filtering unit (60) includes a foreign substance removal filter (61) and a moisture removal filter (62).

[0038] The foreign substance removal filter (61) can filter out foreign substances in the form of particles, including fine dust.

[0039] The moisture removal filter (62) may be made of a pulp material that can absorb moisture, i.e., water, in the gear oil. The moisture removal filter (62) may be placed in close contact with the foreign matter removal filter (61) and may be made in the form of a roll of toilet paper to absorb and remove moisture.

[0040] The decontamination circulation unit (70) includes a gear oil tank (71), a circulation pipe (72), a circulation valve (73), and a circulation pump (74).

[0041] The gear oil tank (71) is positioned at the rear end of the filtering section (60) and can store gear oil from which foreign substances have been removed.

[0042] The circulation pipe (72) can connect the bottom of the gear oil tank (71) and the gear oil pipe (10) upstream of the filtering section (60).

[0043] The circulation valve (73) is positioned on the circulation pipe (72) to control the movement of the gear oil.

[0044] The circulation pump (74) is positioned on the circulation pipe (72) to move the gear oil from the bottom of the gear oil tank (71) to the front of the filtering section (60), thereby allowing the gear oil to pass through the filtering section (60) again.

[0045] The connection part (80) includes a connecting pipe (81) and a connecting valve (82).

[0046] The connecting pipe (81) can connect the first gearbox (2), the second gearbox (3), and the third gearbox (4) respectively.

[0047] The connecting valve (82) is positioned on the connecting pipe (81) to control the movement of the gear oil.

[0048] The control unit (90) stores the normal oil temperature ranges of the first gearbox (2), the second gearbox (3), and the third gearbox (4), and controls the gear oil valve (20), gear oil pump (74), and cooling unit (40) so that when the temperature detected by the oil temperature sensor (51) deviates from the normal oil temperature range, the gear oil is discharged from the corresponding gearbox and cooled.

[0049] The control unit (90) stores the normal contamination range of the gear oil in the gear oil tank (71), and if it is determined that the contamination level of the gear oil in the gear oil tank (71) detected by the contamination detection sensor (53) is outside the normal contamination range, it can control the circulation valve (73) and the circulation pump (74) so ​​that the gear oil in the gear oil tank (71) is filtered by the filtering unit (60).

[0050] The control unit (90) stores the normal oil temperature difference range of the gear oil between the first gear box (2), the second gear box (3), and the third gear box (4), and if it is determined that the temperature difference of the gear oil between the first gear box (2), the second gear box (3), and the third gear box (4) according to the temperature detected by the oil temperature sensor (51) deviates from the normal oil temperature difference range, it can control the corresponding connecting valve (81), the corresponding gear oil valve (71), and the oil circulation pump (30).

[0051] The control unit (90) stores the gear oil movement speed and cooling speed according to the degree to which the normal oil temperature range is exceeded, and can control the gear oil pump (71) and the cooling unit (40) so that at least one of the stored gear oil movement speed and cooling speed is performed based on the degree to which the temperature detected by the oil temperature sensor (51) exceeds the normal oil temperature range.

[0052] Modifiable embodiments other than the above embodiments are described.

[0053] The control unit stores the circulation speed of the gear oil based on the extent to which the contamination level of the gear oil in the oil tank deviates from the normal contamination range, and can control the circulation pump so that the circulation speed of the gear oil is adjusted based on the extent to which the contamination level of the gear oil in the gear oil tank detected by the contamination detection sensor deviates from the normal contamination range.

[0054] The filtering unit further includes a moisture removal filter made of pulp material for removing moisture from the gear oil, and the control unit stores the normal humidity range of the gear oil in the gear oil tank, and if it is determined that the humidity of the gear oil in the gear oil tank detected by the humidity sensor is outside the normal humidity range, the circulation valve and the circulation pump can be controlled so that the moisture in the gear oil in the gear oil tank is removed by the moisture removal filter.

[0055] It further includes an oil amount sensing sensor that detects the amount of gear oil in the gearbox, and the control unit stores the normal amount range of gear oil in the gearbox and can control the gear oil valve, gear oil pump, and connecting valve so that the amount of gear oil in the gearbox becomes the normal amount range when the amount of oil detected by the oil amount sensing sensor deviates from the normal amount range.

[0056] The device further includes a viscosity sensor for detecting the viscosity of gear oil in a gear oil tank, a gear oil discharge unit connected to the gear oil tank for discharging gear oil, and a gear oil supply unit connected to the gear oil tank for supplying gear oil. The control unit stores the normal oil viscosity range of the gear oil in the gear oil tank, and if it is determined that the viscosity of the gear oil detected by the viscosity sensor deviates from the normal oil viscosity range, it can control the gear oil discharge unit and the gear oil supply unit to discharge gear oil from the gear oil tank and supply gear oil to the gear oil tank.

[0057] The control unit stores the amount of gear oil to be replaced based on the viscosity of the gear oil in the gear oil tank, discharges a gear oil replacement amount corresponding to the detected viscosity from the gear oil tank based on the viscosity of the gear oil detected by the viscosity sensor, and can control the supply of a gear oil replacement amount corresponding to the detected viscosity to the gear oil tank.

[0058] Herein, the system further includes a level sensing sensor that detects the gear oil level in the gear oil tank, and the control unit stores a critical gear oil level value and a maximum gear oil level value in the gear oil tank, and if the level value detected by the level sensing sensor is less than or equal to the critical gear oil level value, it can control the supply of gear oil to the gear oil tank so that it becomes less than or equal to the maximum gear oil level value.

[0059] Due to the gear oil circulation system (1) of the first gearbox, second gearbox, and third gearbox above, the temperature of the gear oil of the first gearbox, second gearbox, and third gearbox is monitored, and if it deviates from the normal temperature, the gear oil is discharged from the corresponding gearbox, cooled, and circulated to stably control the temperature.

[0060] In addition, foreign substances that may be generated while the gearbox is operating can be removed during the circulation of gear oil.

[0061] In addition, if the contamination level of the gear oil discharged and circulated from the gearbox deviates from the normal contamination level, it can be circulated so that foreign substances can be repeatedly removed by the filtering unit.

[0062] In addition, if the temperature difference between the three gearboxes exceeds the normal temperature difference range, the gear oil between the gearboxes is mixed to quickly resolve the temperature difference.

[0063] In addition, the greater the deviation of the gear oil temperature from the normal temperature, the faster the circulation speed of the gear oil can be increased and the cooling intensity of the cooling section can be increased to enable faster cooling. Explanation of the symbols

[0065] 1: Gear oil circulation system 2: First gearbox 3: Second gearbox 4: Third gearbox 10: Gear oil pipe 20: Gear oil valve 21: Stop valve 22: Selector valve 30: Oil circulation pump 40: Cooling section 50: Sensor section 51: Oil temperature sensor 52: Humidity sensor 53: Pollution detection sensor 60: Filtering section 61: Foreign matter removal filter 62: Moisture removal filter 70: Contamination Removal Circulation Unit 71: Gear oil tank 72: Circulation piping 73: Circulation valve 74: Circulation pump 80: Connection 81: Connecting pipe 82: Connecting valve 90: Control unit

Claims

Claim 1 A gear oil circulation system for a first gearbox, a second gearbox, and a third gearbox, comprising: a gear oil pipe connected to each of the first gearbox, the second gearbox, and the third gearbox to provide a path for supplying and discharging gear oil; a gear oil valve disposed on the gear oil pipe to control the movement of gear oil; an oil circulation pump including a gear oil pump disposed on the gear oil pipe to move gear oil; a cooling unit disposed on the gear oil pipe to cool the gear oil discharged to each of the first gearbox, the second gearbox, and the third gearbox; and a sensor unit including an oil temperature sensor disposed on each of the first gearbox, the second gearbox, and the third gearbox to detect the temperature of the gear oil. A gear oil circulation system for a first gearbox, a second gearbox, and a third gearbox, characterized by including a control unit that stores a normal oil temperature range for each of the first gearbox, the second gearbox, and the third gearbox, and controls a gear oil valve, a gear oil pump, and a cooling unit so that gear oil is discharged and cooled from the gearbox when the temperature detected by the oil temperature sensor deviates from the normal oil temperature range. Claim 2 A gear oil circulation system of a first gear box, a second gear box, and a third gear box, characterized in that, in claim 1, it further includes a filtering unit disposed on the gear oil pipe to remove foreign substances from the discharged gear oil. Claim 3 In claim 2, the gear oil circulation system of a first gearbox, a second gearbox, and a third gearbox further comprises a gear oil tank disposed downstream of the filtering unit for storing gear oil from which foreign substances have been removed, a circulation pipe connecting the bottom of the gear oil tank and the gear oil pipe upstream of the filtering unit, a circulation valve disposed on the circulation pipe for controlling the movement of gear oil, and a circulation pump disposed on the circulation pipe for moving gear oil; the sensor unit further comprises a contamination detection sensor for detecting the contamination level of gear oil in the gear oil tank; and the control unit stores a normal contamination level range of gear oil in the gear oil tank, and if it is determined that the contamination level of gear oil in the gear oil tank detected by the contamination detection sensor deviates from the normal contamination level range, the control unit controls the circulation valve and the circulation pump so that the gear oil in the gear oil tank is filtered by the filtering unit. Claim 4 A gear oil circulation system for a first gearbox, a second gearbox, and a third gearbox according to claim 3, further comprising a connecting section including a connecting pipe connecting each of the first gearbox, the second gearbox, and the third gearbox, and a connecting valve disposed on the connecting pipe to control the movement of gear oil, wherein the control section stores a normal oil temperature difference range of gear oil between the first gearbox, the second gearbox, and the third gearbox, and if it is determined that the temperature difference of gear oil between the first gearbox, the second gearbox, and the third gearbox according to the temperature detected by the oil temperature sensor deviates from the normal oil temperature difference range, the control section controls the corresponding connecting valve, the corresponding gear oil valve, and the oil circulation pump. Claim 5 A gear oil circulation system of a first gearbox, a second gearbox, and a third gearbox, wherein, in claim 1, the control unit stores a gear oil moving speed and a cooling speed according to the degree to which the normal oil temperature deviates from the normal oil temperature range, and controls the gear oil pump and the cooling unit so that at least one of the stored gear oil moving speed and cooling speed is performed based on the degree to which the temperature detected by the oil temperature sensor deviates from the normal oil temperature range.

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