CN1203475A

CN1203475A - Variable speed electric generating set

Info

Publication number: CN1203475A
Application number: CN 97108115
Authority: CN
Inventors: 宋柏桦
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-20
Filing date: 1997-06-20
Publication date: 1998-12-30

Abstract

A variable speed electric generator set is composed of machine frame, gear speed-variator fixed to the machine frame, power machine and electric generator. The last two are arranged at both sides of gear speed-variator and respectively connected to the axles of active and passive gears. It features that the output power of electric generator changes with the speed ratio of gear drive without changing the output power of power machine, so increasing efficiency and saving energy.

Description

The speed changing type generating set

The present invention relates to a kind of generating set, a kind of speed changing type generating set that utilizes gear-driving speed-variable.

Conventional generating set is made up of an engine and a generator, links by ring flange or belt pulley, and engine and generator are with speed.The generating of the direct drawing generator of engine, output of a generator is less than the engine power output generally speaking, and a generator only limits to be dragged by an engine; The generating of one-level generating set is only adopted in the power station, though the generating set that adopts direct current or alternating current motor drawing generator is also arranged, but these generating sets since its output of a generator less than output power of motor, so can only use as experiment power supply or ac-dc switching power, therefore, the conventional power generation usage unit has shortcomings such as power consumption height, waste is big, pollution is big, the power station factory building is big, cost is high, cost is high, and the full-automatic control of enforcement difficulty is big.

The purpose of this invention is to provide a kind of energy-efficient speed changing type generating set.

The present invention realizes like this, the speed changing type generating set, it includes engine (1) as shown in drawings, generator (11), a frame (12) and a gearbox (5), described gearbox (5) has the gear (6 of tooth transmission mutually, 7), its middle gear (7) is a driving wheel, be coupling by the output shaft (2) of shaft coupling (3) by its axle (4) with engine (1), gear (6) is a driven pulley, be coupling by its axle (8) power shaft (10) by shaft coupling (9) and generator (11), gearbox (5) is positioned on the frame (12) between power shaft (10) one sides of output shaft (2) one sides of engine (1) and generator (11).Because gearbox (5) internal gear adjustable size, so transmission speed ratio is that the ratio of generator (11) rated speed and engine (1) rated speed is so can make generator (11) power output greater than engine (1) power output; For example designing generator (11) power output is 80KW.Rated speed is 750r/min, if selecting rated speed for use is the engine of 3000r/min, then as long as power output is the engine of 22KW; Gearbox (5) gear ratio should be 1: 4 can make unit generation 80KW electric power, reaches to raise the efficiency the purpose of saving the energy.And engine (1) both can be internal combustion engine, steam turbine, the hydraulic turbine, wind energy conversion system, also can be motor.As adopt power transmission line to connect many generators.Form multistage generating with series system, make it to form power large-scale electric generating station (net) and can provide various forms of power supplys such as interchange, direct current, high pressure, low pressure according to customer requirements.Both be applicable to and made the Mobile Power Station that various stand-by power supplies and field work are used, and be more suitable for also being suitable for driving electrical source of power equipment as means of transportations such as automobile, train, steamer, aircrafts in making power large-scale electric generating station.

Below in conjunction with the accompanying drawing illustrated embodiment structure of the present invention is further described.

Fig. 1 is the speed changing type generator unit structure schematic diagram of embodiment 1;

Fig. 2 is the speed changing type generator unit structure schematic diagram of embodiment 2;

Among Fig. 1-2, wherein 1-engine, 2-output shaft, 3-shaft coupling, 4-axle, 5-gearbox, 6-gear, 7-gear, 8-axle, 9-shaft coupling, 10-power shaft, 11-generator, 12-frame.

Embodiment 1: with reference to speed changing type generating set shown in Figure 1, its frame (12) is the framework with five crosspieces of a rectangle by the welding of bar shaped channel-section steel, on the crosspiece in the middle of gearbox (5) is fixed on, gearbox internal gear (6,7) respectively be one, gear (6,7) having good tooth transmission between cooperates, speed ratio is 1: 4, engine (1) is a commercially available steam turbine, be fixed on two crosspieces of gearbox (5) left side, its output shaft (2) is coupling by the wheel shaft (4) of shaft coupling (3) with the driving gear (7) of gearbox (5), a commercially available generator (11) then is fixed on two crosspieces of gearbox (5) right side frame (12), and its power shaft (10) is coupling by the wheel shaft (8) of the interior driven gear (6) of shaft coupling (9) and gearbox (5);

Embodiment 2: with reference to speed changing type generating set shown in Figure 2, its frame (12) is the rectangular frame with five crosspieces of " U " font section bar welding for the cross section, gearbox (5) is fixed on the crosspiece of central authorities, gear (6) as driven pulley in the gearbox is one, gear (7) as driving wheel is two, these two gears (7) also all have good tooth transmission with gear (6) to the lining radial distribution in the both sides of gear (6) and cooperate, speed ratio is 1: 4, engine (1) is two marketable gasolines machines, these two engines (1) are fixed on two crosspieces of gearbox (5) left side, its output shaft (2) is coupling by the wheel shaft (4) of shaft coupling (3) with above-mentioned two gears (7) of gearbox (5) respectively, generator (11) is that a commercially available generator is fixed on two crosspieces of gearbox (5) right side frame (12), and its power shaft (10) is coupling by the wheel shaft (8) of the interior gear (6) of shaft coupling (9) and gearbox (5).

The above-mentioned speed changing type generating set of Gou Chenging is 80KW if design generator (11) power output thus, and rated speed is 750r/min, and then selecting rated speed for use is 3000r/min, and the engine of power output 22KW gets final product, and needn't change the power output of engine.On probation through model machine, effect reaches designing requirement fully.

Claims

1, a kind of engine (1) that includes, generator (11) and frame (12) are at interior speed changing type generating set, it is characterized in that it includes a gearbox (5), described gearbox (5) has the gear (6 of tooth transmission mutually, 7), its middle gear (7) is a driving wheel, be coupling by the output shaft (2) of shaft coupling (3) by its axle (4) with engine (1), gear (6) is a driven pulley, be coupling by its axle (8) power shaft (10) by shaft coupling (9) and generator (11), gearbox (5) is positioned on the frame (12) between power shaft (10) one sides of output shaft (2) one sides of engine (1) and generator (11).