JPS5982507A - Power transmission control method of marine shaft dynamotor - Google Patents

Abstract

PURPOSE:To avoid the generation of gear hammering in transmission gears and effectively utilize exhaust gas energy, by switching the function of a shaft dynamotor in accordance with a pressure change of steam fed from an auxiliary boiler to a turbine. CONSTITUTION:One shaft end 2 of a shaft dynamotor 1 is connected to a main engine 4 through gears 3, and the other shaft end 5 is coupled to an auxiliary turbine 7 by gears 6. Steam is generated in an auxiliary boiler 9 by thermal energy collected by an exhaust gas boiler 8. In accordance with a pressure change of steam fed from the auxiliary boiler 9 to the turbine 7, an operational mode of the shaft dynamotor is switched to either its power generating function or electric motor function. In such a way, generation of gear hammering in the transmission gears can be avoided, and exhaust gas energy of the main engine can ge effectively utilized without any waste.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission control method for a marine shaft generator.

In this Meiji 4+11 book, a shaft generator is connected to a ship's propulsion shaft system, and is supplied with rotational force from the shaft system to perform the function of a generator. This term specifically refers to equipment that also has the function of supplying rotational power to the motor.

Figure qS1 shows an example of the arrangement of a marine propulsion power generation plant using a shaft generator, in which one shaft end 2 of the shaft generator l is connected to the main engine via a gear 3, and the other shaft end is connected to the main engine through a gear 3. j is connected to the auxiliary turbine 7 by gear B. r is an exhaust gas boiler that utilizes exhaust gas energy, and ri is an auxiliary boiler. The steam generated in the auxiliary boiler is heated by the heat energy recovered by the exhaust gas boiler ♂,
It is supplied to the auxiliary turbine 7 via f'/θ. /l is the propulsion shaft system, and 12 is the propulsion device.

In a marine propulsion power plant with this unusual arrangement,
Normally, the control valve/θ is controlled so that the auxiliary turbine consumes all the steam generated in the auxiliary boiler by using the thermal energy recovered by the exhaust gas boiler, after removing the amount of steam for miscellaneous work on the ship. Control is performed so that the drum pressure of 9 (or the pressure before the increase/decrease P/θ) becomes -. Such control is generally called prepressure control, but if a more advanced prepressure control is performed, the output Q of the auxiliary turbine 2 will be
The amount of steam generated in the auxiliary boiler due to the thermal energy recovered by the exhaust gas boiler and the amount of miscellaneous steam change.
The power also changes according to the change in the required power inside the ship.So, if the auxiliary turbine generated output is smaller than the shaft required power La, the -〇power shortage Lm is compensated for from the main force. That is, in FIG. 2, Lw = Lo -LT, and the power shortage Li is replenished from the main engine side to the shaft generator/in the direction indicated by the arrow.

Further, when the output LT of the auxiliary turbine 7 is larger than the shaft required power Lo, the extra power (-Lm) is returned to the main engine at the same time. That is, in this case, as shown in FIG. 3, -Lm = La -LT, and the excess power C-Lm) is returned to the main engine in the direction of the arrow. At this time, if the transmission torque TI of the power supplemented from the main engine or the power returned to the main engine at the main engine side gear 3 is smaller than the torsional fluctuation torque Tv at that location, as shown in Fig. There is a risk of gear hammering noise occurring in the main battle (1111 gearbox).

This invention makes it possible to avoid gear hammering in the transmission gear at all times, regardless of how the shaft generator is used, by controlling the shaft generator by fluctuations in the steam pressure supplied to the turbine. It is an object of the present invention to provide a power transmission control method for a marine shaft generator, which makes it possible to use exhaust gas energy during main battles effectively without wasting it.

The method of the present invention, as a means to achieve all of the above objectives,
One shaft end of the shaft power generator mU 4A is connected to the main engine via a gear, and a turbine is driven by steam from an auxiliary boiler that utilizes the exhaust gas energy of the main engine. A power transmission control method is used in a marine propulsion power generation plant that is connected to each other.
Change in steam pressure supplied from the auxiliary boiler to the turbine I
Depending on IIυ, the power generation function of the shaft base / 4c sea bream wall and the usage mode with ``Rukintsukihime'' are switched, and the above-mentioned
The shaft generator is controlled at the steam pressure so that the magnitude of the transmission load of the gears is maintained at a value greater than the minimum value that can completely avoid occurrence of gear hammering of the gears. It is characterized by being controlled by vibration.

Next, the structure of the method of the present invention will be explained in detail by giving examples.

In Figure 9711, the output of the auxiliary turbine 7 that balances the amount of steam generated by the exhaust gas energy of the main engine in the exhaust gas boiler 2♂ is expressed as 'j: LsTin, which corresponds to the output when full front pressure control is performed. If the difference between this and the reaction force LG at the shaft generator #Jh machine/ is larger than the power Lv corresponding to the torsional fluctuation torque (hereinafter referred to as the torsional fluctuation torque), the gear Since hammering does not occur, forward pressure control is performed as usual. ・LEIT n, La, and υτLlj
t, the difference between them may be calculated, or directly △I7
0 If Lv is smaller than Lv, gear hammering will occur at the seventh stage, so the auxiliary turbine output LT will be equal to the required dynamic cabrus torsional fluctuating power (LG+Lv) at the shaft base, or, Shaft required 1 Lika minus torsional fluctuation power (La -L
(v) Output control is performed in a strict manner so that the gears on the main engine side transmit torsional variable force υ, that is, torque greater than torsional variable torque Tv. At this time, since the auxiliary turbine output LT and exhaust gas energy Lsra do not match, the auxiliary boiler pressure PAB is expected to change, so the auxiliary boiler pressure is detected and the auxiliary turbine output? ,L0+(Lv+
α) and La-CLv+α) to keep the pressure change of the auxiliary boiler within a certain range 0, that is, LT
When LT is smaller than LBTR, the excess thermal energy is stored as a temperature increase (resulting in an increase in pressure) of the auxiliary water, and when LT is larger than L8Tyc, the excess thermal energy is stored and released to reduce exhaust gas. Effectively utilizes the thermal energy absorbed by the boiler. That principle is number one!
Figure 1 shows a different embodiment, in which /3 is a turbo generator, and the energy recovered by the exhaust gas boiler ♂ is generated in the υ auxiliary boiler. Steam governor valve/
In this example, the shaft generator/ and turbo generator/3 are connected to the switchboard/
6, which is connected to the 0 normally,
The output sound of the turbo power generator/3 and the steam generated by the exhaust gas boiler ♂ are controlled so that the remaining steam after removing the ship's miscellaneous steam is consumed by the power generator turbine lj.

For example, the drum pressure of the auxiliary pump (pressure before the governor) is controlled to be constant. Such control is called overflow load sharing control. When the overflow load sharing control is fully performed, the output of the turbo generator 13 changes according to changes in the amount of steam generated in the exhaust gas boiler and the amount of miscellaneous steam. -The power required on board changes depending on the start and stop of the straw rack, etc. Then, the required power on board Wr, 75X
When the output of the turbo generator is larger than WT, the shaft generator/is operated as a generator to supply the insufficient power We', and in this case, the power La for driving the shaft generator/is the power of the main engine. It is fed from the side via gear 3. Figure 2 shows the situation. Further, when the required power WL in the ship is smaller than the turbo generator output WT, the shaft generator / is operated as an electric motor, consumes the extra 'power We' and generates the power LM, and the power is transmitted through the gear 3. It is returned to the main engine. Figure 1θ shows this state.

Power fL is supplied from the main engine to the axis 't to the motive force LG,
Or the power LM supplied to the main engine from the shaft generator/
If the transmission torque T in the transmission gear is smaller than the torsional fluctuation torque Tv at that location, gear hammering may occur in the transmission gear. So this Jt
In order to avoid ¥, Wf from InII, #u dependence/?
The respective outputs during operation as an IZ machine and as an electric motor are kept constant, and their magnitudes are set so that the transmission torque Tel of the transmission gear torsionally changes and the torque Tv also increases. Then, the shaft generator detects the pressure of the auxiliary boiler and, according to the command, turns on, turns on, and alternates between operating as a machine and operating as an electric motor. Figure 1 shows the situation when the shaft base [motor] continues to operate according to this procedure.

Since the power transmission damping method for a marine shaft generator according to the present invention is configured as described above, the occurrence of gear hammering in the transmission gear can be avoided by controlling the shaft base mechanism. At the same time, it has the excellent effect of making it possible to utilize the steam generated by the energy of the exhaust gas from the main gate without wasting it.

In the above embodiments, as a power transmission means for connecting the auxiliary turbine 7 and the shaft generator l, the example shown in Fig. 1 uses a mechanical means using a gear B, and the example shown in Fig. In the above, an example was shown in which an electric means using a switchboard /B was used as a means for connecting the turbo generator /3 and the shaft generator /.However, as the power transmission means, there are also elastic joints, 'frL magnetic joints, Alternatively, it goes without saying that it is possible to employ known transmission means such as fluid couplings.

[Brief explanation of drawings]

Fig. 1 is a layout diagram of a marine propulsion power generation plant showing an embodiment of the method of the present invention, gfj,:z diagram, and Fig. 3 are power transmission diagrams respectively]1. Explanatory diagram showing different points, Part Z
Graph diagrams related to power transmission, Figures 5 and 6
The figure is an explanatory diagram showing the different methods of power transmission for both JLs, and Figure 7 is a graph diagram related to control of power transmission.9
Fig. 1S7 is a layout diagram of a marine plant showing another embodiment of the method of the present invention, Fig. 9 and Fig. 9irl/θ are explanatory diagrams showing different methods of power transmission, and Fig. 1I is a power transmission diagram. It is a graph line diagram regarding the control method of. /01. Shaft electric motor 14, ko, j, ,, shaft end, 3. Otsu 0. . +-R car, ri91. Dohyo, 700. Auxiliary turbine! . 1. Exhaust gas boiler? , , auxiliary boiler, /θ01.
Adjustment valve, /1. ,,propulsion shaft system,/,2. ,,propulsion device,/
3. ,.

Claims (1)

[Claims] The shaft generator has 10,000 shaft ends connected to the main engine through gears, and is equipped with a turbine driven by steam from an auxiliary boiler that utilizes the exhaust gas energy of the main engine. In a marine propulsion power generation plant that is connected to each other via a power transmission means, switching operation between the power generation function and the electric function of the shaft generator in response to fluctuations in steam pressure supplied to the auxiliary boiler or turbine. At the same time, each of the above-mentioned usage conditions is such that the magnitude of the transmission load of the gears is maintained at a minimum value or higher that can avoid the occurrence of gear hammering of both vehicles. 1. A method for controlling power transmission in a moving range to a marine shaft engine, characterized in that the power transmission is controlled by fluctuations in the steam pressure.