JP2011016387A - Rail running surface oil-coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail running surface oil-coating device capable of stably jetting an oil grain of slight amount relative to the rail running surface.SOLUTION: At the operation time of a plunger 3 in which a voltage is applied to a coil 2, an oil pressure at the plunger 3 side is enhanced by a degree of the oil stored in a clearance of the plunger 3 and a stopper 4. When the oil pressure at the plunger 3 side is applied to a delivery check valve 13 through a delivery passage 12, the delivery check valve 13 is slightly rocked in a delivery check valve hole 15 in resistant to urging of a spring 14, the oil stored in an oil storage chamber 11 is fed to a delivery feeding passage 16 through the delivery check valve hole 15, and a delivery narrow part 17 having a smaller diameter than the delivery feeding passage 16 squeezes the oil to vigorously jet the oil from a delivery port 5 in the opened state. Therefore, even when the oil particles of slight amount is jet, a jetting distance of the oil can be controlled.

Description

  The present invention relates to a rail tread surface oiling apparatus provided with an electromagnetic pump capable of injecting oil from a discharge port by electromagnetic operation of a plunger.

  Conventionally, as a rail tread oiling device, a nozzle that injects a small amount of oil toward the upper surface of the head of the inner rail is attached to the side surface of the inner rail of the curved portion, thereby improving the slipping performance of the wheel tread, There is one that prevents creaking noise when traveling on a sharply curved track (for example, Patent Document 1). And in the rail tread surface oiling device described in this patent document 1, the oil pump unit which sends out oil, the oiling unit for injecting a fixed quantity of oil to a rail tread surface portion, and the piping part which connects them And a spring pressure type that presses the piston with the spring in the oiling unit by the pressure of the oiling pump in the oiling pump unit and injects a certain amount of oil from the nozzle when the spring and piston are returned Applicants' investigation revealed that the pumps were used. However, in such a spring pressure type pump, since the viscosity of the oil changes with a change in the outside air temperature, for example, the oil injection distance is not constant between day and night (in the worst case, In addition, there is a problem that the adhesion rate attached to the upper surface of the head of the inner rail is less than about 30 to 50% in actual measurement. On the other hand, in Japanese Patent Application Laid-Open No. 2007-126974 (Patent Document 2), the suction force of the coil is increased by adjusting the applied voltage of the electromagnetic pump, so that the discharge pressure can be adjusted and the discharge port is pressurized. In this state, a pump of a type capable of changing the oil injection distance is disclosed.

JP-A-4-146870 JP 2007-126974 A

  As described above, in the oil pump of the rail tread surface oiling device described in Patent Document 1, since the spring force pressing the piston when injecting oil is constant, the temperature change, the characteristics of the oil used, etc. When the viscosity of the oil changed due to the oil, the oil injection distance was not constant, and could not be stably applied to the rail tread. In addition, since the oil cannot be injected unless the pressure in the piston (distribution valve) is increased once by the oil pump, it was impossible to inject a small amount of oil continuously several times in a short time.

  In addition, in the electromagnetic pump disclosed in Patent Document 2, in the use of injecting a small amount of oil particles from an open discharge port, the piston and the oil passage for pushing out the oil inside of the electromagnetic pump bend and the oil pressure is simply increased by increasing the discharge pressure. The injection distance was not controllable. The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide a rail tread surface oiling device that can stably inject a small amount of oil particles onto the rail tread surface. It is in.

  In order to achieve the above object, in the invention according to claim 1, a plunger that is movable in a linear direction by applying a voltage to the coil, and oil is discharged from the discharge port by sliding of the plunger. In a rail tread surface oiling device having an electromagnetic pump capable of spraying on the rail tread, oil is provided between a stopper fixed to the pump body of the electromagnetic pump and the plunger and the stopper when not operated. An oil storage chamber that can be stored; a discharge passage that is provided in the stopper and communicates with the oil storage chamber and the discharge port; and a discharge check valve that closes the discharge passage when the plunger is not operated. An oil passage through which oil flows from the oil storage chamber to the discharge port through the discharge passage is formed along the sliding direction of the plunger, and when the plunger is operated. The plunger is moved toward the stopper, and the oil in the oil storage chamber compressed by the movement of the plunger is injected from the discharge port through the discharge passage by opening the discharge check valve. In addition, the oil injection distance can be controlled by adjusting the applied voltage to control the speed of the plunger.

  In the invention which concerns on Claim 2, in the rail tread surface oiling apparatus of Claim 1, the said electromagnetic pump was provided in the side surface of the said rail so that oil might be injected from the said discharge outlet toward the said rail tread surface. It is characterized by.

  In the invention which concerns on Claim 3, in the rail tread surface oiling apparatus of Claim 1 or Claim 2, the injection amount per time from a discharge outlet is 0.01-0 according to the movable amount of the said plunger. It can be changed to 1 mL and can be continuously injected a plurality of times.

  In the invention which concerns on Claim 4, in the rail tread surface oiling apparatus of Claims 1-3, the oil supply part which supplies oil to the said oil storage chamber is provided, The said electromagnetic pump is also provided in this oil supply part. It is characterized by using.

  In the invention which concerns on Claim 5, in the rail tread surface oiling apparatus of Claims 1-4, according to the temperature measured by the measuring means which measures oil temperature, external temperature, or apparatus temperature, and this measuring means And a voltage adjusting means for adjusting the applied voltage of the electromagnetic pump.

  In the invention which concerns on Claim 6, in the rail tread surface oiling apparatus of Claim 1-5, the nozzle which makes the said electromagnetic pump reach the predetermined range of the said rail tread on the said electromagnetic pump The electromagnetic pump is provided such that the installation angle of the nozzle visually recognized from the cross-sectional direction and the side surface direction of the rail is in a range of 50 degrees or more and less than 90 degrees or less with respect to a horizontal plane parallel to the ground. It is characterized by that.

  In the invention which concerns on Claim 7, in the rail tread surface oiling apparatus of Claim 6, the front-end | tip outer side shape of the said nozzle is made into the acute angle of a taper shape, It is characterized by the above-mentioned.

  In the invention according to claim 1, when injecting a small amount of oil particles from the electromagnetic pump disclosed in the cited document 2, the oil injection distance cannot be controlled only by increasing the discharge pressure. The oil path through which the oil flows from the discharge path to the discharge port is not tortuous and is formed along the sliding direction of the plunger.When the plunger is operated, the plunger is moved toward the stopper, By ejecting the oil in the oil storage chamber compressed by the movement of the plunger from the discharge port via the discharge path by opening the discharge check valve, and adjusting the applied voltage to control the speed of the plunger Even when a small amount of oil particles are injected, the oil injection distance can be changed.

  Further, in the invention according to claim 2, by providing an electromagnetic pump on the side surface of the rail so as to inject oil from the discharge port toward the rail tread surface, the viscosity (resistance) of the oil increases with changes in the outside air temperature. ) Can be changed, a small amount of oil particles can be continuously injected, and the oil injection distance can be kept constant. In addition, the oil injection distance can be changed freely by adjusting the applied voltage and controlling the plunger speed, so the oil injection distance can be shortened even when external factors such as wind are large. Thus, the landing point of oil on the rail tread can be adjusted, and the influence of external factors can be reduced.

  Moreover, in the invention which concerns on Claim 3, while the injection amount per time from a discharge outlet can be changed to 0.01-0.1 mL according to the movable amount of a plunger, while being several times (for example, 2 -10 times) Oil can adhere to the rail tread one or more times during the injection, even if it is time for the train to pass due to external factors such as gusts or accidents. The probability of doing can be improved.

  Moreover, in the invention which concerns on Claim 4, the oil supply part which supplies oil to an oil storage chamber is provided, and the electromagnetic pump is also used for the oil supply part. This is because the amount of oil discharged from the electromagnetic pump is very small.If the distance from the oil supply section to the electromagnetic pump is increased or the viscosity of the oil is increased, the oil is discharged only by the negative pressure in the oil storage chamber. It cannot be inhaled, resulting in insufficient oil discharge and air stagnation. In other words, it is important to adjust the oil supply amount stably over a low to high oil viscosity range.For example, even if there is even a small amount of air in the oil storage chamber, the oil injection distance will be shortened. , No longer inject at a stable injection distance. Further, even when the oil is attached to the nozzle of the electromagnetic pump, the oil is not injected at a stable injection distance. In order to eliminate these problems, the same electromagnetic pump is used not only for the oil injection part but also for the oil supply part in order to supply oil to the oil storage chamber by the amount of oil injected from the discharge port of the electromagnetic pump. It is desirable to do.

  Moreover, in the invention which concerns on Claim 5, from the measurement means which measures oil temperature, external temperature, or apparatus temperature, the voltage adjustment means which adjusts the applied voltage of an electromagnetic pump according to the temperature measured by the measurement means, If the relationship between the temperature (oil viscosity), the applied voltage of the electromagnetic pump, and the oil injection distance is obtained in advance, By adjusting the applied voltage of the electromagnetic pump in accordance with the measured temperature, the oil injection distance can always be made constant.

  Moreover, in the invention which concerns on Claim 6, the installation angle of the nozzle visually recognized from the cross-sectional direction and side surface direction of the rail is in the range of 50 degrees or more and less than 90 degrees or less with respect to the horizontal plane parallel to the ground. By providing an electromagnetic pump, even if an air block occurs inside the electromagnetic pump, it is possible to discharge air to the outside by a normal injection operation without special air venting work. Can solve the problem.

  Moreover, in the invention which concerns on Claim 7, the installation angle of the nozzle visually recognized from the cross-sectional direction and side surface direction of the rail respectively as described in Claim 6 is 50 degrees or more and less than 90 degrees with respect to the horizontal surface parallel to the ground. When the electromagnetic pump is provided so as to be in the range, oil tends to accumulate on the surface of the tip of the nozzle, and the oil injection distance tends to become unstable due to this. At this time, by setting the outer shape of the tip of the nozzle to a tapered acute angle, oil does not collect at the tip of the nozzle, and the oil injection distance can be stabilized.

It is sectional drawing of the electromagnetic pump provided in an oil coating unit and an oil pump unit. It is the schematic which looked at the oiling unit attached to the side surface of a rail (rail) from the upper surface (A), cross section (B), and side surface (C) of the rail. It is the conceptual diagram which looked at the oiling unit attached to the side of a rail (rail) and the oiling pump unit connected to the oiling unit from the upper part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the electromagnetic pump 1 provided inside the oil application unit 21 and the oil application pump unit 22, and FIG. 2 shows the oil application unit 21 attached to the side surface of the rail 24 as an upper surface (A ), A schematic view seen from the cross section (B) and the side surface (C), and FIG. 3 shows the oil application unit 21 attached to the side surface of the rail 24 and the oil supply pump unit 22 connected to the oil application unit 21. It is a conceptual diagram seen from the top.

  In FIG. 1, an electromagnetic pump 1 includes a plunger 3 that is movable (slidable) in a linear direction by applying a voltage to a coil 2, and a stopper 4 that is recessed into the plunger 3 side, It has an open discharge port 5 for injecting oil and an intake port 6 for sucking oil from the outside. Further, the plunger 3 is pierced in a concave shape toward the suction port 6, and a suction path 7 is formed in the center of the bottom surface of the concave portion so as to communicate the suction port 6 and the oil storage chamber 11. . In addition, a spring 8 for biasing the plunger 3 against the stopper 4, a suction check valve 9 for opening and closing the suction port 6, and an inner side of the spring 8 are provided in the concave portion of the plunger 3. The oil is stored between the spring 10 for biasing the suction check valve 9 against the stopper 4 when the plunger 3 is operated and the stopper 4, and the oil storage chamber 11 for storing the spring 8 and the spring 10. And have. A discharge path 12 that connects the oil storage chamber 11 and the discharge check valve hole 15 is formed in the center of the bottom surface of the concave portion of the stopper 4. The stopper 4 includes a discharge check valve 13 for opening and closing the discharge passage 12, a spring 14 for urging the discharge check valve 13 against the discharge restrictor 17, and a discharge check when the plunger 3 is operated. From the discharge check valve hole 15 in which the valve 13 can be slightly swung, from the discharge check valve hole 15 to the discharge restrictor 17, oil is supplied, and the discharge supply path 16 that houses the spring 14 and the discharge supply path 16 A discharge restrictor 17 for restricting the supplied oil and ejecting the oil from the discharge outlet 5 in an open state.

  In the electromagnetic pump 1 configured as described above, first, the plunger 3 is pushed downward by being biased by the spring 8 when the plunger 3 is not actuated when no voltage is applied to the coil 2. Oil is supplied from the suction port 6 through the suction passage 7 while the oil storage chamber 11 is negative with respect to the oil storage chamber 11 formed by the gap between the plunger 3 and the stopper 4 and the concave portion of the plunger 3. Will receive. On the other hand, in the stopper 4, the urging force of the spring 14 is stronger than the hydraulic pressure from the plunger 3 side, so that the discharge path 12 is closed by the discharge check valve 13 urged by the spring 14.

  Further, when the plunger 3 to which a voltage is applied to the coil 2 is operated, the plunger 3 is pushed upward so as to contact the stopper 4 against the bias of the spring 8. At this time, the spring 10 sufficiently depresses the suction check valve 9 to close the suction passage 7, and the hydraulic pressure on the plunger 3 side is increased by the amount of oil stored in the gap between the plunger 3 and the stopper 4. Enhanced. When the hydraulic pressure on the plunger 3 side is applied to the discharge check valve 13 via the discharge path 12, the discharge check valve 13 slightly swings in the discharge check valve hole 15 against the bias of the spring 14. The oil stored in the oil storage chamber 11 is supplied to the discharge supply passage 16 through the discharge check valve hole 15, and the discharge throttle portion 17 having a diameter smaller than that of the discharge supply passage 16 squeezes the oil to open the discharge outlet 5. It comes to spout vigorously.

  As shown in FIG. 1, an oil path through which oil flows from the oil storage chamber 11 to the discharge port 5 through the discharge path 12, the discharge supply path 16, and the discharge restrictor 17 is disposed inside the electromagnetic pump 1. It does not wind, and is formed in a substantially linear shape along the sliding direction of the plunger 3. For this reason, when the plunger 3 is operated, the hydraulic pressure on the plunger 3 side easily propagates to the stopper 4 side via the discharge check valve hole 15.

  Further, when the electromagnetic pump 1 is mounted inside the oil coating unit 21 described later, the discharge port 5 of the electromagnetic pump 1 has a supply direction of oil injected from the discharge port 5 with respect to the rail tread surface 25 (rail tread surface). A definable nozzle 20 is screwed together. Therefore, when the oil is pushed out from the discharge port 5, the oil is ejected from the tip of the nozzle 20 that has a diameter smaller than the discharge port 5 and larger than the discharge throttle portion 16. By forming the tip outer shape of the tip 20 into a tapered acute angle, oil flows down along the inclined surface on the outer side of the tip, so that oil does not accumulate at the tip of the nozzle 20 and the oil injection distance can be stabilized.

  The electromagnetic pump 1 configured as described above is provided inside the oil coating unit 21 and the oil pump unit 22. As shown in FIG. 2, the oil coating unit 21 is provided on the side surface of the rail 24 (rail) so as to be lower than the rail tread surface 25 (rail track) in order to prevent contact with the passing train. It has been. The installation angle of the nozzle 20 of the electromagnetic pump 1 provided in the oiling unit 21 is 50 degrees with respect to a horizontal plane parallel to the ground as viewed from the cross-sectional direction of the rail 24, as shown in FIG. The range is less than 90 degrees and, as shown in FIG. 2C, a range of 50 degrees to 90 degrees with respect to a horizontal plane parallel to the ground when viewed from the side of the rail 24 (FIG. 2C). In this paper, only the right side is drawn with respect to the vertical line of the horizontal plane, but the left side is also included.) And sprayed from the tip of the nozzle 20 of the electromagnetic pump 1 on the oil coating unit 21 side. The oil thus drawn is supplied to a predetermined range of the rail tread 25 while drawing a parabola. For this reason, even if an air block occurs inside the electromagnetic pump 1 on the oiling unit 21 side, it is possible to discharge the air to the outside by a normal injection operation without any special air bleeding operation. The problem of the injection distance can be solved.

  Further, as shown in FIG. 3, the oiling pump unit 22 includes a plurality of (three in this example) oiling units 21 connected to one unit in order through a connecting pipe 23. It is provided at a position 5 to 20 m away. The oil pump unit 22 includes a pump tank (not shown) that stores a certain amount of oil, an electromagnetic pump 1 that supplies oil stored in the pump tank to each oil unit 21, and an oil pump unit. From measuring means for measuring the surface temperature (device temperature) of the electromagnetic pump 1 on the 22 side and voltage adjusting means for adjusting the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side according to the temperature measured by the measuring means And a control device 30 is provided. That is, the control device 30 performs control so that a predetermined applied voltage is applied to each electromagnetic pump 1 provided in the oil coating unit 21 according to the temperature measured by the electromagnetic pump 1 on the oil coating pump unit 22 side. Thus, the oil sprayed from the tip of the nozzle 20 of the electromagnetic pump 1 on the oil coating unit 21 side is supplied to a predetermined range of the rail tread 25. In addition, when the control device 30 injects oil from the tip of the nozzle 20 of the electromagnetic pump 1 provided in the oil coating unit 21 toward the rail tread 25, the control device 30 applies a predetermined amount to the electromagnetic pump 1 provided in the oil pump unit 22. By controlling so as to apply the applied voltage, the amount of oil that has been jetted is supplied to each electromagnetic pump 1 on the oil coating unit 21 side.

  Next, a description will be given of test results of tests using a system that simulates an actual machine environment using the electromagnetic pump 1 configured as described above. Specifically, the electromagnetic pump 1 is used for three oiling units 21 and one oiling pump unit 22, the distance from the oiling unit 21 to the oiling pump unit 22 is 10 m, and between the oiling units 21. A system that simulates the actual machine environment of 2 m is manufactured, and the movable speed of the plunger 3 is controlled by adjusting the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side, so that a small amount of oil from the tip of the nozzle 20 We investigated how much the spray distance of the grains changed.

  The test was performed in a thermostatic bath, and the test was started after the oil temperature became equal to the temperature of the thermostatic bath set. The oil injection distance was measured by making a model of the same size as the rail 24 and measuring the distance from the tip of the nozzle 20 to the position where the oil landed on the rail tread 25. Further, the target distance from the tip of the nozzle 20 to 200 to 400 mm on the rail tread 25 is within the specified range, and other distances are out of the specified range. The test conditions in the system simulating the actual machine environment are as shown in Table 1, and the oil application unit 21 side can supply the oil injected by the three electromagnetic pumps 1 on the oil application unit 21 side. Each of the electromagnetic pumps 1 was operated at 1 Hz, while one electromagnetic pump 1 on the oil pump unit 22 side was operated at 3 Hz. These test results are shown in Table 2.

  As shown in Table 2, when the oil temperature is −5 ° C., the oil injection distance is within the range of 215 to 335 mm within the voltage range of 15 to 18 V of the electromagnetic pump 1 on the oil coating unit 21 side. On the other hand, when the voltage is in the range of 5 to 14V, no oil is injected (marked in Table 2), the voltage is 19V or more and exceeds 400 mm, and the injection distance is unspecified (-marked in Table 2). became. In addition, when the oil temperature is 0 ° C., the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is in the range of 11 and 12 V, and the oil injection distance is within the specified range of 245 to 365 mm, whereas the voltage No oil was injected in the range of 5 to 10 V, and the voltage was 13 V or more and exceeded 400 mm, resulting in an unspecified injection distance. In addition, when the oil temperature is 5 ° C., the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is in the range of 9,10V, and the oil injection distance is within the specified range of 230 to 335 mm, whereas the voltage No oil was injected in the range of 5 to 8 V, and the voltage was 11 V or more and exceeded 400 mm, resulting in an unspecified injection distance. Moreover, when the oil temperature is 10 ° C., the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is within the range of 8 to 10 V, and the oil injection distance is within the specified range of 215 to 395 mm. No oil was injected in the range of 5 to 7 V, and the voltage was 11 V or more and exceeded 400 mm, resulting in an unspecified injection distance.

  In addition, when the oil temperature is 15 and 20 ° C., the oil injection distance is within the specified range of 230 to 350 mm when the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is 8 and 9 V. No oil was injected in the voltage range of 5 to 7V, and the voltage exceeded 10mm at a voltage of 10V or more, resulting in an unspecified injection distance. For oil temperatures of 30 and 40 ° C., the oil injection distance is within the specified range of 200 to 395 mm when the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is in the range of 7 to 9 V. No oil was injected in the voltage range of 5 or 6 V, and the voltage exceeded 10 mm at a voltage of 10 V or more, resulting in an unspecified injection distance. Furthermore, when the oil temperature is 60 to 80 ° C., the oil injection distance is within the specified range of 200 to 335 mm when the voltage of the electromagnetic pump 1 on the oil coating unit 21 side is in the range of 7,8V. No oil was injected in a voltage range of 5 or 6 V, and the voltage was 9 V or more and exceeded 400 mm, resulting in an unspecified injection distance.

  When a pump capable of adjusting the discharge pressure by increasing the suction force of the coil by adjusting the applied voltage of the electromagnetic pump as disclosed in Patent Document 2, the oil temperature is -5 ° C to 10 ° C. In this case, a very small amount of oil particles could not be injected from the discharge outlet in the open state, and the specified injection distance could not be secured. When the oil temperature was 15 ° C. or higher, the oil injection distance varied.

  As is clear from the above test results, even when the oil temperature is changed in the range of −5 to 80 ° C., the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side is adjusted to adjust the plunger 3 By controlling the moving speed, it was possible to set the spray distance of a small amount of oil particles from the tip of the nozzle 20 to the spray distance within the specified range. In addition, in each oiling unit 21, the substantially same injection distance is obtained. In addition, regarding the voltage of the electromagnetic pump 1 on the oil coating unit 21 side, the oil temperature is 15V with respect to -5 ° C, the oil temperature is 11V with respect to 0 ° C, the oil temperature is 9V with respect to 5 to 40 ° C, oil By setting the temperature to 8 V with respect to 50 to 80 ° C., the injection distance of each oil can be within the specified range. Thus, by controlling the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side by four channels of 15V, 11V, 9V, and 8V, the number of channels can be reduced, and the controller 30 in the oil pump unit 22 The control burden can be reduced.

  In addition, instead of performing channel control on the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side, the control device 30 measured the oil injection distance to be a constant injection distance (for example, 300 mm). The applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side may be linearly controlled according to the temperature (for example, the oil temperature in the pump tank in the oil coating pump unit 22). Table 3 shows a specific example in which the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side is linearly controlled according to the oil temperature in the pump tank. Specifically, data on the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side required for the oil temperature in the pump tank is set so that the oil injection distance becomes a constant injection distance (for example, 300 mm). By accumulating, an approximate curve (offset curve) shown in Table 3 is calculated in advance for the relationship between the oil temperature in the pump tank and the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side. And even if the temperature measured by the control device 30 changes by using the relationship between the oil temperature in the pump tank and the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side, the measured temperature depends on the measured temperature. By controlling the applied voltage of the electromagnetic pump 1 on the oil coating unit 21 side, a constant injection distance can be obtained with respect to the oil injection distance.

  In the embodiment described above, the oil temperature in the pump tank in the oil pump unit 22 is measured in the control device 30 of the oil pump unit 22, but the outside air temperature, the pump tank on the oil pump unit 22 side is measured. Surface temperature (apparatus temperature), surface temperature (apparatus temperature) of the electromagnetic pump 1 on the oiling unit 21 side or the oiling pump unit 22 side, oil temperature inside the electromagnetic pump 1, and a plurality of units on the oiling unit 21 side In the example, the average temperature of the surface temperature (device temperature) of the three electromagnetic pumps 1 and the average temperature of the oil temperature inside the electromagnetic pump 1 are measured, and the electromagnetic on the oil application unit 21 side is measured according to these measured temperatures. The applicant has confirmed that the applied voltage of the pump 1 may be controlled. When the oil temperature in the electromagnetic pump 1 on the oil coating unit 21 side is measured, it is possible to accurately grasp the viscosity of the oil injected to the rail tread surface 25. Suitable for obtaining the injection distance. Further, in this embodiment, “Idemitsu Kosan Bios Hydro 32SE” is used as the oil used in the electromagnetic pump 1, but even if other types of oil are used, the temperature and coating measured by the control device 30 are used. By calculating in advance the relationship with the applied voltage of the electromagnetic pump 1 on the oil unit 21 side, a constant injection distance can be obtained with respect to the oil injection distance as described above.

  Next, the test result regarding the adhesion rate of oil which tested the electromagnetic pump 1 in the actual machine environment is demonstrated. Specifically, as shown in FIG. 3, an actual machine environment using the electromagnetic pump 1 is manufactured for three oil coating units 21 and one oil pump unit 22, and the oil injection amount per time is Oiling unit according to the temperature measured by the electromagnetic pump 1 on the oiling pump unit 22 side under the test conditions of 0.02 mL, the number of oil injections per set is 4 times, and the injection interval between 1 set is 8 minutes Control was performed so that a predetermined applied voltage was applied to the electromagnetic pump 1 on the 21 side, and the probability of oil adhering to the rail tread 25 was investigated. The survey results are shown in Table 4.

  As shown in Table 4, when the outside air temperature is 15 ° C., when the number of times of oil injection from each electromagnetic pump 1 on the oil coating unit 21 side is 100 times, the rail tread 25 for the three oil coating units 21 is used. As a result, the adhesion rate of oil to the rail tread 25 is 100% by injecting 25 sets with 4 injections of oil per set. was gotten. When the outside air temperature is 24 ° C., when the number of times of oil injection from each electromagnetic pump 1 on the oil coating unit 21 side is 100 times, the oil adheres to the rail tread 25 with respect to the three oil coating units 21. Although the rate became 87 to 98%, the result that the adhesion rate of oil to the rail tread 25 was 100% was obtained by injecting 25 sets with 4 injections of oil per set. Further, when the outside air temperature is 32 ° C., when the number of times of oil injection from each electromagnetic pump 1 on the oil coating unit 21 side is 100 times, the oil adheres to the rail tread 25 for the three oil coating units 21. Although the rate was 89 to 99%, the result of the oil adhesion rate to the rail tread 25 being 100% was obtained by injecting 25 sets with 4 injections of oil per set.

  As is clear from the above test results, even when the outside air temperature is 15, 24, or 32 ° C., the number of times of oil injection from each electromagnetic pump 1 on the oil coating unit 21 side is 100 times in a single shot. In addition, when the number of oil injections per set is set to 4 and 25 sets are injected, the adhesion rate of oil to the rail tread 25 becomes 100%, and the oil can be reliably supplied to the rail tread 25. The result was obtained. In each oil application unit 21, the oil injection distance from the tip of the nozzle 20 is 170 to 230 mm, and an appropriate injection distance is obtained.

DESCRIPTION OF SYMBOLS 1 Electromagnetic pump 2 Coil 3 Plunger 4 Stopper 5 Discharge port 6 Suction port 11 Oil storage chamber 13 Discharge check valve 20 Nozzle 21 Oiling unit 22 Oiling pump unit 24 Rail (rail)
25 Rail tread (rail tread)
30 Control device

Claims (7)

In a rail tread surface oiling device comprising a plunger movable in a linear direction by applying a voltage to the coil, and an electromagnetic pump capable of injecting oil from a discharge port onto the rail tread surface of the rail by sliding the plunger,
A stopper provided fixed to the pump body of the electromagnetic pump;
An oil storage chamber capable of storing oil between the plunger and the stopper when not operating;
A discharge path provided in the stopper and communicating the oil storage chamber and the discharge port;
A discharge check valve that closes the discharge path when the plunger is not operated,
An oil path through which oil flows from the oil storage chamber through the discharge path to the discharge port is formed along the sliding direction of the plunger,
During the operation of the plunger, the plunger is moved toward the stopper, and the oil in the oil storage chamber compressed by the movement of the plunger is passed through the discharge path by opening the discharge check valve. In addition, the rail tread surface oiling device is characterized in that the oil injection distance is changed by controlling the speed of the plunger by adjusting the applied voltage while injecting from the discharge port.   The rail tread surface oiling device according to claim 1, wherein the electromagnetic pump is provided on a side surface of the rail so as to inject oil from the discharge port toward the rail tread surface.   The electromagnetic pump can change the injection amount per one time from the discharge port to 0.01 to 0.1 mL according to the movable amount of the plunger, and can continuously inject a plurality of times. The rail tread surface oiling device according to claim 1 or 2, characterized in that.   The rail tread surface oiling device according to claim 1, further comprising an oil supply unit that supplies oil to the oil storage chamber, wherein the electromagnetic pump is also used in the oil supply unit.   A control device comprising: a measuring unit that measures an oil temperature, an outside air temperature, or a device temperature; and a voltage adjusting unit that adjusts an applied voltage of the electromagnetic pump according to the temperature measured by the measuring unit. The rail tread surface oiling device according to claim 1 to 4.   The electromagnetic pump includes a nozzle that allows oil injected from the discharge port to reach a predetermined range of the rail tread surface, and an installation angle of the nozzle viewed from the rail direction and the side surface direction is parallel to the ground. The rail tread surface oiling device according to claim 1, wherein the electromagnetic pump is provided so as to be in a range of 50 degrees or more and less than 90 degrees or less with respect to a horizontal plane.   The rail tread surface oiling device according to claim 6, wherein the outer shape of the tip of the nozzle is a tapered acute angle.

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