A lubrication system for a cantilever type tunnel boring machine cutting reducer

Abstract

The present invention belongs to the technical field of cantilevered roadheader equipment in coal mines, and discloses a lubrication system for a cantilevered roadheader cutting reducer in coal mines that can realize online oil monitoring, including an abrasive collector, a filter, a cooler, a first dielectric constant sensor, a second dielectric constant sensor, a collection controller, and a display alarm. One end of the abrasive collector is connected to the oil output end of the reduction box, and the other end is connected to the oil input end of the reduction box through the filter and the cooler in sequence. An electromagnet is arranged on the abrasive collector, and the control end of the electromagnet is connected to the output end of the collection controller. The first dielectric constant sensor is arranged in the abrasive collector, and the second dielectric constant sensor is arranged between the filter and the cooler. The present invention has a simple structure, is easy to use, and can improve the service life of the cutting reducer.

Description

Technical Field

[0001] The invention belongs to the technical field of cantilever type roadheader equipment in coal mines, and in particular relates to a lubrication system for a cutting reducer of a cantilever type roadheader in coal mines. Background Art

[0002] The working conditions in coal mines are harsh. Cantilevered roadheaders are mainly used to develop tunnels in coal mines. The cutting part is a direct component of the roadheader to break coal and rock. It is mainly composed of a cutting motor that provides power, a reducer that realizes transmission deceleration, a cantilever end that transmits large torque, and a cutting head that breaks coal and rock. The reducer is one of the core components of the roadheader. The internal transmission is mainly through gears. Oil lubrication is very important. If the metal abrasive particles generated during the gear meshing process are not cleaned in time, they will spread with the oil and cause certain damage to key components such as gears, bearings, and seals. At the same time, the reducer is equipped with an internal spray system. The occurrence of liquid jumping will cause the oil to emulsify and affect the lubrication effect, thereby aggravating the damage of the cutting reducer, shortening its service life, and seriously affecting coal mine production. Summary of the invention

[0003] The present invention overcomes the deficiencies of the prior art and aims to solve the following technical problems: providing a lubrication system for a cantilever type roadheader cutting reducer in a coal mine, which can reduce mechanical failures and increase machine life by online monitoring of the oil state.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lubrication system for a cantilever tunneling machine cutting reducer in a coal mine, characterized in that it includes an abrasive collector, a filter, a cooler, a first dielectric constant sensor, a second dielectric constant sensor, an acquisition controller and a display alarm, one end of the abrasive collector is connected to the oil output end of the reduction box, and the other end is connected to the oil input end of the reduction box through the filter and the cooler in sequence, an electromagnet is arranged on the abrasive collector, and the control end of the electromagnet is connected to the output end of the acquisition controller, the first dielectric constant sensor is arranged in the abrasive collector, and the second dielectric constant sensor is arranged between the filter and the cooler, the signal output ends of the first dielectric constant sensor and the second dielectric constant sensor are connected to the input end of the acquisition controller, and the output end of the acquisition controller is connected to the display alarm.

[0005] The abrasive particle collector comprises a collector shell, an oil channel is arranged at the center of the collector shell, and the electromagnet and the first dielectric constant sensor are fixedly arranged on the collector shell.

[0006] The lubrication system for the cutting reducer of a cantilever-type tunneling machine in an underground coal mine also includes a temperature sensor, which is arranged between the filter and the cooler and is used to measure the oil temperature and send it to the acquisition controller.

[0007] The acquisition controller is used to send an alarm signal to the display alarm when the oil temperature measured by the temperature sensor exceeds a temperature threshold.

[0008] The acquisition controller is used to set the on-off cycle of the electromagnet.

[0009] The on-off cycle of the electromagnet is one hour, wherein the on-time is 55 minutes and the off-time is 5 minutes, and this is repeated.

[0010] The acquisition controller is used to determine the oil contamination and the wear condition inside the gear box according to the output signals of the first dielectric constant sensor and the second dielectric constant sensor during the power on and off cycle.

[0011] The method for the acquisition controller to judge the oil contamination and the wear condition inside the gear box is:

[0012] First, the oil cleanliness threshold A, the pollution alarm threshold B and the oil-free threshold C are set, and the data peaks a and b measured by the first dielectric constant sensor and the second dielectric constant sensor in one detection cycle are respectively obtained. In one cycle, if a=A, it is determined that the gearbox is not worn; if a>A, it is determined that the gearbox is worn; if a≥B, it is determined that the gearbox is severely worn and an alarm is issued to remind the machine to stop for inspection; if b>A, it is determined that the filter is damaged; if b=C, it is determined that the filter element is clogged.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention accelerates the collection of abrasive particles by installing dielectric constant sensors before and after the filter respectively, and installing an abrasive collector in front of the filter; the dielectric constant sensor in front of the filter reflects the internal wear of the reduction gearbox through oil quality information; the dielectric constant sensor after the filter can monitor whether the oil entering the reduction gearbox is clean, and provide a corresponding alarm device to remind the staff to replace the oil and shut down for inspection; at the same time, according to the data displayed by the second node constant sensor, it can be known whether the filter element is blocked, which not only realizes the online monitoring of the oil in the lubrication system, but also can promptly remind the personnel to carry out maintenance, thereby improving the life of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a lubrication system for a cutting reducer of a cantilever type roadheader in a coal mine provided by an embodiment of the present invention;

[0015] Figure 2A schematic diagram of the structure of the wear particle collector used in an embodiment of the present invention;

[0016] Figure 3 for Figure 2 Left view of .

[0017] In the figure: 1 is a collector housing, 2 is an electromagnet, and 3 is a first dielectric constant sensor. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, an embodiment of the present invention provides a lubrication system for a cutting reducer of a cantilever tunneling machine in an underground coal mine, comprising an abrasive particle collector, a filter, a cooler, a first dielectric constant sensor, a second dielectric constant sensor, a collection controller and a display alarm, wherein one end of the abrasive particle collector is connected to the oil output end of the reduction box, and the other end is connected to the oil input end of the reduction box through the filter and the cooler in sequence, an electromagnet is arranged on the abrasive particle collector, and the control end of the electromagnet is connected to the output end of the collection controller, the first dielectric constant sensor is arranged in the abrasive particle collector, and the second dielectric constant sensor is arranged between the filter and the cooler, the signal output ends of the first dielectric constant sensor and the second dielectric constant sensor are connected to the input end of the collection controller, and the output end of the collection controller is connected to the display alarm.

[0020] Specifically, in this embodiment, the first dielectric constant sensor and the second dielectric constant sensor are intrinsically safe electrical equipment for mining. Specifically, their model is GYD6 intrinsically safe oil dielectric constant sensor for mining, which is suitable for explosive hazardous environments with gas and coal dust in coal mines. It uses dielectric induction technology to detect changes in comprehensive oil pollution indicators caused by factors such as lubricating oil emulsification, dust pollution, and metal wear particles, and judges whether the oil can continue to be used through the dielectric constant index in the oil.

[0021] In the embodiment of the present invention, the cutting reducer of the tunnel boring machine adopts a circulating oil circuit lubrication and cooling method. The gear oil lubricates the gears and then passes through the gear pump to the filter and cooler and then flows back to the gear box. By adding an abrasive collector, two mining intrinsically safe oil dielectric constant sensors, a temperature sensor and a corresponding acquisition controller to the pipeline, real-time monitoring of the reducer oil status can be achieved. The dielectric constant sensor needs to be calibrated before installation. The actual working conditions are simulated to calibrate the corresponding dielectric constant value of sensor 1 according to the degree of oil contamination. The dielectric constant threshold of sensor 1 within a cycle when the oil is clean is set to A, the oil contamination alarm threshold is set to B, and the dielectric constant when there is no oil is set to C.

[0022] Specifically, Figure 2 As shown, in this embodiment, the abrasive collector comprises a collector housing 1, an oil channel is arranged at the center of the collector housing 1, one end of the oil channel is connected to the oil output end of the reducer, and the other end is connected to the oil input end of the filter, and the electromagnet 2 and the first dielectric constant sensor 3 are fixedly arranged on the collector housing 1. By turning on the electromagnet 2 on the abrasive collector, the collection of abrasive particles can be accelerated.

[0023] Furthermore, if Figure 1 As shown, in the embodiment of the present invention, a temperature sensor is further included, and the temperature sensor is arranged between the filter and the cooler, and is used to measure the oil temperature and send it to the acquisition controller. The acquisition controller is used to send an alarm signal to the display alarm when the oil temperature measured by the temperature sensor exceeds the temperature threshold.

[0024] Further, in this embodiment, the acquisition controller is used to set the on-off cycle of the electromagnet. Specifically, in this embodiment, the on-off cycle of the electromagnet is: one hour is one cycle, wherein the on-time is 55 minutes, the off-time is 5 minutes, and this is repeated. Further, in summary of this embodiment, the acquisition controller is used to determine the oil contamination and the wear inside the gearbox according to the output signals of the first dielectric constant sensor and the second dielectric constant sensor during the on-off cycle.

[0025] The specific method for judging the oil contamination and the wear condition inside the gearbox is as follows: first, simulate the actual working conditions to calibrate the values ​​of the oil cleanliness threshold A, the contamination alarm threshold B and the oil-free threshold C, and then obtain the data peaks a and b measured by the first dielectric constant sensor and the second dielectric constant sensor in a detection cycle respectively. In one cycle, if a=A, it is determined that the gearbox has no wear; if a>A, it is determined that the gearbox is worn; if a≥B, it is determined that the gearbox is severely worn, and an alarm is issued to remind the shutdown inspection; if b>A, it is determined that the filter is damaged; when b=C, it is determined that the filter element is clogged.

[0026] In the early stage of gear wear of the cutting reducer, the metal particles in the oil are too small to be captured, and the sensor cannot reflect in time, which will aggravate the damage of gears, seals, etc. The embodiment of the present invention accelerates the collection of abrasive particles by setting a corresponding abrasive particle collector. The start and stop of the electromagnet on the surface of the shell is controlled by the acquisition controller, and a suitable power-off frequency is set. The abrasive particle collector first collects the abrasive particles under the action of magnetic force when the electromagnet is energized, and then the electromagnet is powered off, the abrasive particles are released, and the local concentration of the abrasive particles increases instantly, so that the dielectric constant sensor 1 can quickly capture the wear condition in the reduction box. In addition, a filter and a second dielectric constant sensor are added after the oil passes through the abrasive particle collector. The filter is used to filter the metal chips and other impurities coming out of the abrasive particle collector. The second dielectric constant sensor is used to determine whether the oil entering the gear box is clean. A temperature sensor is then connected in series to monitor the temperature change of the oil in real time. When the temperature is too high, the acquisition controller sends a signal to the display alarm to prompt the operator to stop the machine for inspection immediately.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lubrication system for a cantilever type tunneling machine cutting reducer in a coal mine, characterized in that: The invention comprises an abrasive particle collector, a filter, a cooler, a first dielectric constant sensor, a second dielectric constant sensor, a collection controller and a display alarm. One end of the abrasive particle collector is connected to the oil output end of the reduction box, and the other end is connected to the oil input end of the reduction box through the filter and the cooler in sequence. An electromagnet is arranged on the abrasive particle collector, and the control end of the electromagnet is connected to the output end of the collection controller. The first dielectric constant sensor is arranged in the abrasive particle collector, and the second dielectric constant sensor is arranged between the filter and the cooler. The signal output ends of the first dielectric constant sensor and the second dielectric constant sensor are connected to the input end of the collection controller, and the output end of the collection controller is connected to the display alarm. The acquisition controller is used to judge the oil contamination and the wear condition inside the gear box according to the output signals of the first dielectric constant sensor and the second dielectric constant sensor during the power on and off cycle; the method for judging the oil contamination and the wear condition inside the gear box by the acquisition controller is: First, the oil cleanliness threshold A, the pollution alarm threshold B and the oil-free threshold C are set, and the data peaks a and b measured by the first dielectric constant sensor and the second dielectric constant sensor in one detection cycle are obtained respectively. In one cycle, if a=A, it is determined that the gearbox is not worn; if a>A, it is determined that the gearbox is worn; if a≥B, it is determined that the gearbox is severely worn and an alarm is issued to remind the shutdown inspection; if b>A, it is determined that the filter is damaged; if b=C, it is determined that the filter element is clogged.

2. The lubrication system for a cutting reducer of a cantilever type tunneling machine in a coal mine according to claim 1, characterized in that: The abrasive particle collector comprises a collector shell (1), an oil channel is arranged at the centre of the collector shell (1), and the electromagnet and the first dielectric constant sensor are fixedly arranged on the collector shell (1).

3. The lubrication system for a cutting reducer of a cantilever type roadheader in a coal mine according to claim 1, characterized in that: It also includes a temperature sensor, which is arranged between the filter and the cooler and is used to measure the oil temperature and send it to the collection controller.

4. The lubrication system for a cutting reducer of a cantilever type roadheader in a coal mine according to claim 1, characterized in that: The acquisition controller is used to send an alarm signal to the display alarm when the oil temperature measured by the temperature sensor exceeds a temperature threshold.

5. The lubrication system for a cutting reducer of a cantilever type roadheader in a coal mine according to claim 1, characterized in that: The acquisition controller is used to set the on-off cycle of the electromagnet.

6. The lubrication system for a cutting reducer of a cantilever type tunneling machine in a coal mine according to claim 5, characterized in that: The on-off cycle of the electromagnet is one hour, wherein the on-time is 55 minutes and the off-time is 5 minutes, and this is repeated.

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