JPH0224913Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is a power generation device that sets an engine and a generator to supply electric power at a constant frequency through the rotation of the engine. The aim is to change the rotation speed of the engine to improve fuel efficiency.

(b) Conventional technology Conventionally, a power generation system consisting of an engine and a generator connects the generator and engine directly, and operates by maintaining the rotational speed at the rated rotational speed of the generator, regardless of load fluctuations. It was on.

Therefore, it was necessary to continue the rotation under high load even under low load, resulting in a waste of fuel. To solve this problem, it is possible to install a high-load power generator and a low-load power generator set, but maintaining two power generators at all times is wasteful both in terms of space and economy. It was.

In addition, two or more alternating current generators with different rated speeds can be coaxially configured for one engine and used depending on the load, or two or more generators with different numbers of poles can be set to The one with fewer poles is directly connected to the engine, and the one with more poles is connected to the engine via the transmission and clutch, and when changing the engine speed according to the load situation, the speed change clutch is slid and the generator is switched on. They were making a switch.
(Utility Model Application No. 57-197758).

However, these conventional techniques have had drawbacks such as temporary power outage when switching generators and the need for two generators.

(c) Problems that the invention aims to solve The present invention aims to solve the above-mentioned problems with the conventional two-speed type power generation set. I tried to avoid it.

Further, the configuration is such that a two-speed type power generation device can be configured with one engine and one generator without providing two generators or two engines.

In other words, when switching between low and high loads, the engine's rated speed gradually changes from low to high.
Accordingly, a slipping clutch device is inserted to gradually slide the clutch to maintain the input rotation of the generator at the rated rotation and eliminate power outages. It rotates freely using a one-way clutch.

(d) Means for solving the problem In order to achieve the above objectives, the present invention is constructed as follows.

Inside the transmission case 4, a first shaft 20 connected to the output shaft 9 of the engine 3 and a second shaft 10 connected to the input shaft 19 of the generator 1 are supported by bearings in parallel. A gear 12 and a fixed gear 11 are arranged on the top, a gear 14 with a gear 15 and a one-way clutch 6 interposed is arranged on the second shaft 10, and a gear 14 with a fixed gear 11 and a one-way clutch 6 interposed therebetween. 1
4 are meshed, gears 12 and 15 are meshed,
between the gear 12 and the first shaft 20, or between the gear 15 and the second shaft
A slipping clutch is interposed between the shaft 10, and the speed change rate of the fixed gear 11 and the gear 14 and the gear combination of the gear 12 and the gear 15 are controlled by the engine 3.
The speed change rate is set such that the high speed rated rotation speed and the low speed rated rotation speed of the slipping clutch 7 are the same when the rotation speed is transmitted to the second shaft 10 through both gear trains.
It is possible to gradually transition between "disconnect" and "contact".

(e) Embodiments and operations The above is the purpose and structure of the present invention. Next, the structure and operations of the embodiments will be explained based on the attached drawings.

Figure 1 is an overall side view of the two-speed power generator of the present invention, Figure 2 is a control block diagram of the present invention, and Figure 3 is the relationship between the load of the two-speed power generator and the fuel consumption of the engine. It is a graph.

The overall configuration will be explained from FIGS. 1 and 2.

3 is an engine, and the generator 1 is placed and fixed on the same bed. A transmission case 4 is fixed to the engine 3. A second shaft 10 of the transmission case 4 serves as an output shaft and is connected to an input shaft 19 of the generator 1 via a coupling 13. 5 is a governor device provided on the side of the engine 3.

Reference numeral 2 designates a control box, which uses a knob 18 or a lever to change the engine's rated rotation up or down.

As a result, the governor 5 is adjusted and the rotation is switched between, for example, 1800 rotations and 1200 rotations.

17 is a sensor that detects the rotation speed of the engine output shaft 9; 16 is a sensor that detects the rotation speed of the input shaft 19 of the generator 1; both sensors 17, 16
The signal obtained by This increases the amount of pressure oil.

The transmission mechanism inside the transmission case 4 will be explained with reference to FIG.

The first shaft 20 is arranged coaxially with the engine output shaft, and the second shaft 10 is arranged coaxially with the input shaft 19 of the generator 1.

The gear 11 on the first shaft 20 and the gear 14 on the second shaft 10 have the same number of teeth and have a one-to-one correspondence. On the other hand, gears 12 and 15 driven via the slipping clutch 7
5 has a smaller configuration.

That is, the speed change rate of the gear train of fixed gear 11 and gear 14, and the speed change rate of the gear train of gear 12 and gear 15,
The speed change ratio is such that the high speed rated speed and low speed rated speed of the engine 3 are transmitted to the second shaft 10 via both gears at the same speed.

As an example, if the high speed rated rotation speed is 1800 rotations and the low speed rated rotation speed is 1200 rotations, the ratio of gear 12 and gear 15 is configured to be 3:2, and gear 11 to gear 6 is configured.
The rotation speed of the input shaft 19 when the rotation speed is transmitted along the path of the gear 12 is also the same as the rotation speed of the input shaft 19 when the rotation speed is transmitted along the path of the gear 12 and the gear 15.
The rotation speed is also set to 1800 rpm.

A one-way clutch 6 is interposed between the gear 14 and the second shaft 10, and when the slipping clutch 7 is in the "disengaged" position, 1800 rotations are applied from the gear 11 to the gear 6.
and if it is transmitted to the second axis 10,
The one-way clutch 6 engages and integrates the gear 14 and the second shaft 10.

On the other hand, when slipping clutch 7 is "closed",
The rated rotational speed is 1200 rotations, and the second shaft 10 rotates at 1800 rotations via gears 12 and 15.

In this case, the gear 14 is driven by the gear 11 and rotates at 1200 rotations, the one-way clutch 6 freely rotates 1800 rotations on the side of the second shaft 10, and the gear 14 also rotates 1200 rotations, so both are completely free. It is interposed in the direction in which rotation is performed.

The operation of the present invention will be explained with reference to FIG.

FIG. 3 is a graph showing the relationship between load and engine fuel consumption. Curve l shows the case when the engine was operated at 1800 rotations, and curve m shows the case when the engine was operated at 1200 rotations.

Point P on curve 1 indicates the rated state at 1800 rotations, and it can be seen that as the load decreases, the fuel consumption increases.

On the other hand, point Q also represents the rated state for 1200 rotations, and as the load decreases, fuel efficiency increases. Therefore, if the load is larger than point Q,
It is necessary to operate at 1800 rpm, and when the load is smaller than point Q, it is more economical to operate at 1200 rpm.

Therefore, if the setting value for switching the engine to high-load or low-load operation is determined, for example, at a point corresponding to point R, then the rated speed can be set at the most advantageous point, taking into account fuel consumption and the degree of damage to the engine. You can change the number.

In the above configuration, first, the slipping clutch 7 is disengaged, and the engine rotates at a high speed rated speed of 1800 revolutions, and the second shaft is rotated via the gears 11 to 14.

From the time when power consumption is high to drive the work equipment,
Assuming that the switch is made to a time period in which power consumption is low, such as when only indoor lighting is used, the operator switches the knob 18 in FIG. 1 in the L direction.

As a result, the governor 5 rotates in the low speed direction, and the engine rotation gradually changes to the low speed rated rotation speed of 1200 rotations. From 1800 rotations of this engine output shaft 9
Engine rotation sensor 1 detects the drop to 1200 rpm.
7, the slipping clutch 7 is gradually brought into close contact with the slipping clutch 7.

An electromagnetic proportional valve 8 is used as a device for gradually feeding this pressure oil. This slip is controlled by the controller so that the generator input shaft 19 always rotates at 1800 rpm regardless of the engine speed.

Conversely, when returning to the high power consumption state, the operator rotates the knob 18 to the H side, and the governor 5 of the engine 3 is switched and the rated rotation gradually changes from 1200 rotations to 1800 rotations.

At this time, the slipping clutch 7 should be fully engaged.
Gradually slip from the state and finally reach 1800
The slipping clutch 7 is "disengaged" when the rotation starts. The number of revolutions of the input shaft 19 of the generator 1 is kept at 1800 revolutions.

The one-way clutch 6 is free even during this high-low switching, and when the slipping clutch 7 becomes "disconnected", the gears 12, 15
When the force for rotating the second shaft 10 disappears, the second shaft is rotated via the one-way clutch 6 only by rotation from the gear 14.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, a two-speed generator is combined with one engine and one
Since it can be constructed with one generator, one transmission case, one slipping clutch, and one one-way clutch, it can be constructed compactly and at low cost.

Second, the generator does not have a power outage even when the engine is switched between low and high speeds, as is the case with power generators used as auxiliary equipment on ships.
This meant that it could be used in cases where power outages were not allowed.

Thirdly, by switching the rated engine speed between the high speed rated speed and the low speed rated speed, the fuel consumption of the engine 3 can be significantly reduced.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the two-speed power generator of the present invention, Figure 2 is a control block diagram of the present invention, and Figure 3 is the relationship between the load of the two-speed power generator and the fuel consumption of the engine. It is a graph. 1... Generator, 2... Control box, 3... Engine, 4... Speed change case, 9... Engine output shaft, 10... Second shaft, 19... Generator input shaft, 2
0...First axis.

Claims (1)

[Scope of utility model registration request] Inside the transmission case 4, a first shaft 20 connected to the output shaft 9 of the engine 3 and a second shaft 10 connected to the input shaft 19 of the generator 1 are supported by bearings in parallel. A gear 12 and a fixed gear 11 are arranged on the top, a gear 14 with a gear 15 and a one-way clutch 6 interposed is arranged on the second shaft 10, and a gear 14 with a fixed gear 11 and a one-way clutch 6 interposed therebetween. 1
4 are meshed, gears 12 and 15 are meshed,
between the gear 12 and the first shaft 20, or between the gear 15 and the second shaft
A slipping clutch 7 is interposed between the shaft 10,
The speed change rate of the gear train of fixed gear 11 and gear 14, and the speed change rate of the gear train of gear 12 and gear 15 are transmitted to the second shaft through both gear trains. A two-speed power generating device characterized in that the speed change ratio is such that the number of rotations during transmission to the clutch 10 is the same, and the slipping clutch 7 can be gradually shifted between "disengaged" and "engaged" states.