JP4309617B2 - Industrial locomotive - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an industrial locomotive used for towing and transporting cargo on a premises such as a steelworks. More specifically, the present invention relates to an industrial locomotive with excellent availability of replacement parts.
[0002]
[Prior art]
Industrial locomotives are used for transporting and moving large buildings such as steelworks. Diesel locomotives are often used as such industrial locomotives. The diesel locomotive includes a locomotive called DHL (Diesel Hydraulic Locomotive) and a locomotive called DEL (Diesel Electric Locomotive). DHL is often used in the premises of steelworks. The DHL drives wheels from a diesel engine through a liquid torque converter and a speed reducer.
[0003]
[Problems to be solved by the invention]
However, the diesel locomotive described above has a problem in that it is difficult to quickly repair parts because it is difficult to obtain parts at the time of failure or it takes a considerable time. This is because most of the components of the diesel locomotive are dedicated items. And if it takes time to repair, it will hinder the transportation and movement of products on the premises such as steelworks. In addition, since most of the replacement parts are exclusive parts, they are expensive, and as a result, there is a problem that the repair cost becomes high. Furthermore, there is also a problem that a specialized engineer is necessary for periodic maintenance.
[0004]
Here, as long as it is used on the premises of an ironworks, it is not necessary to travel a long distance and there is no steep slope, so high performance (high horsepower) is not required for industrial locomotives. In view of this, the present inventor has come up with the idea of using a general-purpose generator as a drive source in order to facilitate repair work such as repair and maintenance, although there is a slight decrease in performance.
[0005]
Accordingly, the present invention has been made to solve the above-described problems, and provides an industrial locomotive that can be repaired quickly and inexpensively and can be easily maintained in the event of a failure. This is the issue.
[0006]
[Means for Solving the Problems]
The industrial locomotive according to the present invention, which has been made to solve the above-mentioned problems, is a general-purpose portable generator that is commercially available in an industrial locomotive used for towing and transporting cargo on the premises of an ironworks or the like. And an inverter that controls the frequency of the AC voltage output from the portable generator, and an induction motor that drives the wheels, the portable generator being detachably mounted on the vehicle body Then, the AC power generated by the portable generator is supplied to the induction motor via the inverter, thereby rotating the wheel.
[0007]
In this industrial locomotive, the frequency of the three-phase AC voltage generated by a commercially available general-purpose portable generator is changed by an inverter, and the three-phase AC voltage after the frequency change is supplied to the induction motor. Thereby, an induction motor drives with the rotation speed according to the frequency set with the inverter, and a wheel rotates. Then, the frequency is changed by the inverter to control the rotation speed of the induction motor, and the vehicle speed of the industrial locomotive is controlled.
[0008]
As described above, since a general-purpose portable generator is used as the drive source of the industrial locomotive, when the generator breaks down, the availability of replacement parts is very good and can be easily replaced. . And if the voltage and frequency of the generator are the same, it is possible to easily change the generator manufacturer and change the capacity, and to respond quickly to troubles. In addition, maintenance can be easily performed, and the locomotive itself can be manufactured at a very low cost.
[0009]
In addition, the generators are available in a wide variety of capacities, and multiple units can be operated in parallel, so that the size of the locomotive can be increased. When a plurality of generators are mounted, the operation can be switched according to the load, so that energy saving can be achieved. Furthermore, since an industrial locomotive is equipped with a generator, it can also be used as a power supply vehicle. That is, even if there is no power source, commercial power equipment can be used. Further, since the generator is portable, the generator can be easily detached from the locomotive, so that the generator can be temporarily used as an original generator.
[0010]
Here, in the industrial locomotive according to the present invention, the portable generator is preferably a diesel generator.
[0011]
This is because, at present, the most diesel generators are distributed in the market, so that they can be obtained most inexpensively and promptly. However, if a generator other than a diesel generator is generalized in the future and becomes widely distributed in the market, the generator may be used.
[0012]
In the industrial locomotive according to the present invention, it is desirable that the capacity of the portable generator is approximately twice or more the capacity of the inverter.
[0013]
This is because harmonic noise is generated from the inverter, and the harmonic noise may be input to the generator, so that the generator is not affected by the harmonic noise. That is, if the capacity of the generator is equal to the capacity of the inverter, the generator may break down due to harmonic noise.
[0014]
Furthermore, the industrial locomotive according to the present invention preferably includes a hydraulic pressure generating device that generates a hydraulic pressure necessary to drive the various actuators.
[0015]
This is because the industrial locomotive can be used not only as a towing vehicle but also as a work vehicle. Note that the number of hydraulic pressure generators provided in the industrial locomotive and the magnitude of the hydraulic pressure generated by the hydraulic pressure generators are set to optimum values according to the purpose of use.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a most preferred embodiment embodying an industrial locomotive of the invention will be described in detail with reference to the drawings. The industrial locomotive according to the present embodiment is a small locomotive that is used for transporting products and the like at steelworks. Therefore, a schematic configuration of the industrial locomotive according to the present embodiment is shown in FIGS. FIG. 1 is a perspective view showing an industrial locomotive 10. FIG. 2 is a side view showing the industrial locomotive 10. FIG. 3 is a plan view showing the industrial locomotive 10. FIG. 4 is a bottom view of the industrial locomotive 10. FIG. 5 is a view of the industrial locomotive 10 as seen from the rear.
[0017]
As shown in FIGS. 1 and 2, the industrial locomotive 10 includes a diesel generator 11 that is a drive source, a front wheel motor 13 that drives the front wheels 12, and a rear wheel motor 15 that drives the rear wheels 14. And an inverter 16 for controlling the rotation of the motors 13 and 15 and an operation panel 17 for controlling the operation of the inverter 16 and the like.
[0018]
The diesel generator 11 is a portable generator that is commercially available, and has a capacity of 50 Hz and 50 kVA, for example. And the diesel generator 11 is installed in the substantially center position near the vehicle front. In the present embodiment, there is one generator, but a plurality of generators may be arranged and connected in parallel. Thereby, the output of the industrial locomotive 10 can be increased (enlarged). And when a some generator is arrange | positioned, since switching of operation | movement can be performed according to load, energy saving can be achieved.
[0019]
Further, by using a general-purpose diesel generator 11 as a drive source, the locomotive itself can be manufactured at a very low cost. Furthermore, by installing the general-purpose diesel generator 11 in the industrial locomotive 10, the industrial locomotive 10 can be used as a power vehicle in addition to the towing vehicle. That is, even if there is no power source, commercial power equipment can be used. Moreover, since the diesel generator 11 is portable, the diesel generator 11 can be easily removed from the industrial locomotive 10, so that the diesel generator 11 can be temporarily used as a generator.
[0020]
Both the front wheel 12 and the rear wheel 14 are iron wheels and run on rails laid on the premises of the steelworks. As shown in FIG. 4, a front wheel motor 13 is connected to the axle 12a of the front wheel 12 via a gear box 13a. Similarly, a rear wheel motor 15 is connected to an axle 14a of the rear wheel 14 via a gear box 15a. Both the front wheel motor 13 and the rear wheel motor 15 are general-purpose three-phase induction motors (inverter motors) that are commercially available. For example, the output is 11 kW.
[0021]
The inverter 16 that controls the driving of the front wheel motor 13 and the rear wheel motor 15 is a commercially available general-purpose variable voltage variable frequency (VVVF) inverter, and has a capacity of, for example, 22 kVA. The inverter 16 changes the frequency of the three-phase AC voltage output from the diesel generator 11 and supplies the three-phase AC voltage after the frequency change to the front wheel motor 13 and the rear wheel motor 15. Yes.
[0022]
Thus, the capacity of the inverter 16 is about ½ of the capacity of the diesel generator 11. That is, the capacity of the diesel generator 11 is about twice that of the inverter 16. The reason why the diesel generator 11 having a capacity larger than the capacity of the inverter 16 is used is as follows. That is, when the frequency of the three-phase AC voltage is changed by the inverter 16, harmonic noise is generated. This harmonic noise may also be input to the diesel generator 11. And if the capacity | capacitance of the diesel generator 11 is equivalent to the capacity | capacitance of the inverter 16, there exists a possibility that the diesel generator 11 may fail by this harmonic noise. However, if the capacity of the diesel generator 11 is larger than the capacity of the inverter 16 (about twice or more), even if harmonic noise from the inverter 16 is input to the diesel generator 11, the diesel generator 11 is large. Not affected. Therefore, the reliability of the diesel generator 11 can be improved. For this reason, the capacity of the diesel generator 11 is approximately twice that of the inverter 16.
[0023]
The operation panel 17 includes a vehicle speed lever for adjusting the speed of the industrial locomotive 10, a horn switch for sounding the alarm device 20, and the rotational directions of the front and rear wheel motors 13 and 15 to change the industrial locomotive 10. A forward / reverse switch for changing the traveling direction of the vehicle, a speedometer for displaying the speed of the industrial locomotive 10, and the like are provided. Then, as shown in FIG. 5, when the crew member gets into the industrial locomotive 10 and operates the operation panel 17, the industrial locomotive 10 is caused to travel. The industrial locomotive 10 according to the present embodiment can also be driven by a remote control operation, and a receiving antenna 21 for that purpose is installed at the rear of the vehicle.
[0024]
Here, the traveling control system of the industrial locomotive 10 will be described with reference to FIG. FIG. 6 is a block diagram showing a travel control system of the industrial locomotive 10. As shown in FIG. 6, the travel control system of the industrial locomotive 10 includes a diesel generator 11, an inverter 16, an operation panel 17, and front and rear wheel motors 13 and 15. Diesel generator 11, front wheel motor 13, rear wheel motor 15, and operation panel 17 are each connected to inverter 16.
[0025]
A three-phase AC voltage output from the diesel generator 11 is input to the inverter 16. Further, a three-phase AC voltage whose frequency output from the inverter 16 is changed is input to the front wheel motor 13 and the rear wheel motor 15. That is, in the industrial locomotive 10, the frequency of the three-phase AC voltage output from the diesel generator 11 is varied by the inverter 16 to control the rotational speeds of the front wheel motor 13 and the rear wheel motor 15. The vehicle speed is adjusted.
[0026]
Further, as shown in FIG. 3, the industrial locomotive 10 is provided with a hydraulic pressure generating unit 18 at the front of the vehicle and a hydraulic pressure generating unit 19 at the rear of the vehicle. The hydraulic pressure generation unit 18 is a unit for supplying hydraulic pressure for outriggers, and can generate a hydraulic pressure of 70 MPa. On the other hand, the hydraulic pressure generating unit 19 is a unit for supplying hydraulic pressure for operating various actuators of the towed vehicle, and can generate a hydraulic pressure of 7 MPa. Thereby, the industrial locomotive 10 can be used as a work vehicle in addition to the towing vehicle.
[0027]
Next, the operation of the industrial locomotive 10 having the above configuration will be described. When the industrial locomotive 10 is moved forward, a crew member gets into the locomotive, sets the forward / reverse switch provided on the operation panel 17 to forward, and operates the vehicle speed lever. By this operation, a three-phase AC voltage is output from the diesel generator 11 and input to the inverter 16. In the inverter 16, the frequency of the input three-phase AC voltage is changed according to the operation amount of the vehicle speed lever. Then, the three-phase AC voltage whose frequency has been changed is input to the front wheel motor 13 and the rear wheel motor 15, respectively. As a result, the front wheel motor 13 and the rear wheel motor 15 are driven at a rotational speed corresponding to the frequency set by the inverter 16. Thus, the industrial locomotive 10 runs.
[0028]
Actually, when the crew member operates the vehicle speed lever of the operation panel 17, the frequency set by the inverter 16 is gradually changed from the low frequency to the high frequency, and the rotational speeds of the front wheel motor 13 and the rear wheel motor 15 are gradually increased. Controlled to be higher. Thereby, the industrial locomotive 10 starts to travel without slipping, and then travels at a predetermined speed.
[0029]
When the industrial locomotive 10 is moved backward, the forward / reverse switch provided on the operation panel 17 is set to reverse and the vehicle speed lever is operated to perform the same control as in the forward movement. The vehicle moves backward.
[0030]
Here, a response when the drive system of the industrial locomotive 10 fails will be described. In the industrial locomotive 10 according to the present embodiment, as described above, general-purpose products are used for the diesel generator 11, the inverter 16, and the motors 13 and 15. For this reason, it is possible to quickly and inexpensively obtain replacement parts for the failed part. This makes it very easy to deal with troubles. In particular, by using a general-purpose portable type for the diesel generator 11 as a drive source, if the generator voltage and frequency are the same, the generator manufacturer can be easily changed and the capacity can be changed. Therefore, it is possible to quickly respond to troubles. Also, maintenance can be easily performed.
[0031]
As described above in detail, according to the industrial locomotive 10 according to the present embodiment, since general-purpose products are used for the diesel generator 11, the inverter 16, and the motors 13 and 15, replacement is possible at the time of failure. Parts can be obtained quickly and inexpensively. This makes it very easy to deal with troubles.
[0032]
Moreover, since the general-purpose portable diesel generator 11 is used as the drive source of the industrial locomotive 10, if the generator voltage and frequency are the same, it is easy to change the generator manufacturer or change the capacity. Because it can be done, it is possible to quickly respond to troubles. Also, maintenance can be easily performed. Furthermore, the locomotive itself can be manufactured at a very low cost. Furthermore, the industrial locomotive 10 can be used as a power supply vehicle in addition to the towing vehicle.
[0033]
Furthermore, since the industrial locomotive 10 uses the diesel generator 11 having a capacity approximately twice the capacity of the inverter 16, even if harmonic noise generated by the inverter 16 is input to the diesel generator 11. The diesel generator 11 is not greatly affected. Furthermore, since the industrial locomotive 10 is provided with the hydraulic pressure generating units 18 and 19, it can be used as a work vehicle in addition to the towing vehicle.
[0034]
It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. In the said embodiment, although the diesel generator 11 is used for a general purpose generator, if other generators, such as a gas turbine, will become general purpose in the future, those generators can also be used. Moreover, in the said embodiment, although the iron wheel is used for the wheels 12 and 14, if it can be steered by making an iron wheel into a rubber tire, it can also be utilized as a transport cart. Further, the number of hydraulic pressure generating units provided in the industrial locomotive 10 is not limited to two, and may be one or three or more. The magnitude of the hydraulic pressure generated by the hydraulic pressure generating unit is an optimum value according to the purpose of use. Should be set.
[0035]
【The invention's effect】
As described above, according to the industrial locomotive according to the present invention, a general-purpose portable generator commercially available as a drive source is used in an industrial locomotive used for towing and transporting cargo on the premises of an ironworks or the like. Since it is used, replacement parts can be obtained and repaired quickly and inexpensively at the time of failure, and maintenance can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective view of an industrial locomotive according to an embodiment.
FIG. 2 is a side view of the industrial locomotive of FIG.
FIG. 3 is a plan view of the industrial locomotive of FIG. 1;
4 is a bottom view of the industrial locomotive of FIG. 1. FIG.
FIG. 5 is a rear view of the industrial locomotive of FIG. 1;
6 is a block diagram showing a control system of the industrial locomotive of FIG. 1; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Industrial locomotive 11 Diesel generator 12 Front wheel 13 Front wheel motor 14 Rear wheel 15 Rear wheel motor 16 Inverter 17 Operation panel 18, 19 Hydraulic pressure generation unit

Claims (4)

In industrial locomotives used for towing and transporting cargo on premises such as steelworks,
A commercially available general-purpose portable generator, an inverter that controls the frequency of the AC voltage output from the portable generator, and an induction motor that drives the wheels,
The portable generator is detachably mounted on a vehicle body, and an AC voltage generated by the portable generator is supplied to the induction motor via the inverter. An industrial locomotive characterized by rotating. In the industrial locomotive according to claim 1,
The locomotive for industrial use, wherein the portable generator is a diesel generator. In the industrial locomotive according to claim 1 or claim 2,
The industrial locomotive characterized in that the capacity of the portable generator is approximately twice or more the capacity of the inverter. In any one industrial locomotive as described in Claims 1-3,
An industrial locomotive comprising a hydraulic pressure generator that generates a hydraulic pressure required to drive various actuators.

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