CN215333122U - Cooling air duct of variable frequency generator - Google Patents

Abstract

The utility model discloses a cooling air duct of a variable frequency generator, which comprises a cylinder head air guide cover, a connecting cover, a silencer protective cover and an engine side cover, wherein the cylinder head air guide cover is arranged outside a motor of the variable frequency generator, and the motor is connected with a crank case; the connecting cover is sleeved outside the connecting pipe; an engine side cover is arranged on the side surface of the cylinder head wind scooper and connected with the cylinder head wind scooper; the connecting cover is connected with the cylinder head air guide cover and the engine side cover, and the top of the connecting cover is communicated with the muffler shield. This application is through setting up the cylinder head wind scooper outside the engine, through cylinder head wind scooper air inlet, cools off engine cylinder head, then in the cooling air enters into the silencer guard shield through the connecting cover, because the silencer guard shield is with the silencer parcel, consequently the cooling air enters into the silencer guard shield after can be further to cool off the silencer to cool down the silencer, can prevent that the silencer from being in the high temperature state for a long time.

Description

Cooling air duct of variable frequency generator

Technical Field

The utility model relates to the technical field of generator cooling, in particular to a cooling air duct of a variable-frequency generator.

Background

The generator engine can produce tail gas at the in-process that uses, and the noise of tail gas is great, and consequently tail gas need be discharged after the silencer is handled, because the tail gas temperature of engine is higher, consequently can make the higher or even local meeting of temperature of silencer temperature redden, the silencer warp probably to appear under high temperature for a long time, and noise reduction effect weakens.

Disclosure of Invention

The utility model provides a cooling air duct of a variable frequency generator, aiming at the problems that the temperature of the tail gas of the generator is higher, so that the temperature of a silencer is higher, the silencer is deformed after long-term use, and the noise reduction effect is weakened.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a cooling air duct of a variable frequency generator comprises a cylinder head air guide cover, a connecting cover, a silencer shield and an engine side cover, wherein the cylinder head air guide cover is arranged outside an electric motor of the variable frequency generator; the connecting cover is sleeved outside the connecting pipe; the crankcase is communicated with the cylinder head air guide cover, an engine side cover is arranged on the side surface of the cylinder head air guide cover, and the engine side cover is connected with the cylinder head air guide cover; the connecting cover is connected with the cylinder head air guide cover and the engine side cover, and the top of the connecting cover is communicated with the muffler shield; the cylinder head wind scooper, the crankcase, the engine side cover, the connecting cover and the muffler shield form a main cooling air channel.

Preferably, the engine air guide cover also comprises a frequency converter air guide cover and an engine air guide cover, wherein one side of the engine air guide cover is communicated with the frequency converter air guide cover, and the other side of the engine air guide cover is communicated with the crankcase. The cooling air is directly introduced from the outside of the generator through the frequency converter air guide cover and the engine air guide cover, so that the cooling effect is better.

Preferably, the muffler shroud includes an upper cover and a lower cover, and the connecting cover communicates with the lower cover. By dividing the muffler shield into an upper shell and a lower shell, the muffler is easily installed in the lower shell.

Preferably, the cooling device further comprises a motor cover plate, a motor rear cover and a cooling fan, wherein the motor cover plate is arranged at the front end of the motor, the motor rear cover is sleeved outside the motor, the cooling fan is arranged on one side of the motor, which is far away from the motor cover plate, and the motor rear cover is communicated with the engine side cover; the motor cover plate, the motor rear cover, the cooling fan and the engine side cover form an auxiliary cooling air channel. The motor also can produce heat in the operation process, through with motor rear portion installation cooling fan, cooling fan rotates along with the rotation of electric motor rotor to form the negative pressure, the wind outside the motor gets into through the motor apron and cools off the motor after the part directly discharges, and the part enters into the silencer guard shield through the engine side cover after the cooling air of connecting the cover in with the engine mixes the back and discharges in the silencer cooling back.

Preferably, the side surface of the engine side cover is provided with an air inlet. Through set up the air intake on engine side cover, the rotor of motor drives cooling fan and rotates, forms the negative pressure, inhales outside cold air in the motor to lower the temperature to the motor.

Preferably, the crankcase is provided with a plurality of air inlets. The upper part and the lower part of the crankcase are provided with a plurality of air inlets, and cooling air is guided into the upper surface and the lower surface of the crankcase through the small holes, so that the temperature of oil in the crankcase can be reduced, and the service life of the whole engine can be prolonged.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the cylinder head wind guide cover is arranged outside the engine, air is fed through the cylinder head wind guide cover to cool the cylinder head of the engine, then cooling air enters the muffler shield through the connecting cover, and the muffler is wrapped by the muffler shield, so that the cooling air can further cool the muffler after entering the muffler shield, thereby cooling the muffler and preventing the muffler from being in a high-temperature state for a long time.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a cooling air duct of a variable frequency generator provided by the present invention;

FIG. 2 is a schematic structural diagram of an auxiliary cooling air duct;

FIG. 3 is a schematic view of the direction of the cooling wind of the motor;

FIG. 4 is a schematic view of the engine once in sea;

FIG. 5 is a schematic view of the crankcase;

FIG. 6 is a schematic structural diagram of a main cooling air duct;

FIG. 7 is a schematic view of a portion of the structure of FIG. 6;

fig. 8 is an exploded view of a portion of the structure of fig. 6.

The labels in the figure are: 1-motor cover plate, 3-motor rear cover, 4-cooling fan, 5-stator, 6-rotor, 7-frequency converter wind scooper, 8-engine wind scooper, 9-cylinder head wind scooper, 10-connecting cover, 11-connecting pipe, 12-lower cover, 13-upper cover, 14-engine side cover, 15-crankcase, 16-air inlet and 17-air inlet.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in figure 1, the utility model provides a cooling air duct of a variable frequency generator, the variable frequency generator comprises an engine, a generator and a frequency converter, a frequency converter air guide cover 7 is arranged at the position of the frequency converter, an engine air guide cover 8 is arranged at one side of the frequency converter air guide cover 7 far away from the frequency converter, a cylinder head air guide cover 9, an engine side cover 14 and a crankcase 15 wrap the engine, the frequency converter air guide cover 7 is communicated with the crankcase 15 through the engine air guide cover 8, the cylinder head air guide cover 9 is connected with the crankcase 15, and the engine side cover 14 is arranged at one side of the crankcase 15 far away from the engine air guide cover 8. The side edge of the connecting cover 10 is provided with an opening, and the connecting cover 10 is communicated with the engine side cover 14 and the cylinder head wind scooper 9 through the opening. One side of connecting pipe 11 communicates with the gas outlet of engine, the opposite side communicates with the silencer, connecting pipe 11 is installed in connecting cover 10, the tail gas of engine enters into the silencer through connecting pipe 11 like this and falls the processing of making an uproar, because the higher general 200 left and right sides of tail gas temperature, tail gas can make the silencer turn red, influence the structure of silencer, consequently too high in order to prevent exhaust tail gas temperature, be equipped with the silencer guard shield in the outside of silencer, the silencer guard shield with connect cover 10 intercommunication. An air outlet is arranged on the side surface of the muffler shield.

The muffler shield comprises an upper cover 13 and a lower cover 12, and the upper cover 13 and the lower cover 12 can be connected by bolts, so that the separated design can be conveniently installed.

Still include motor cover plate 1, motor rear cover 3 and cooling fan 4 in the variable frequency generator, motor cover plate 1 install in the front end of motor, 3 covers of motor rear cover are established outside the motor, cooling fan 4 install in the motor is kept away from one side of motor cover plate 1, motor rear cover 3 with engine side lid 14 intercommunication.

As shown in fig. 4, four air inlets 16 are provided on the side surface of the engine-side cover 14, and cooling air can be introduced through the air inlets 16. As shown in fig. 5, a plurality of air inlets 17 are formed in the crankcase 15, the air inlets 17 are formed in the edge of the crankcase 15, external cooling air is sucked into the crankcase 15 through a double-blade fan on the engine to dissipate heat of engine oil in the crankcase 15, and finally, the heat-dissipated hot air is discharged out of the engine, the heat-dissipating ribs on the lower portion of the crankcase 15 of the engine are over against heat-dissipating windows on the bottom plate of the variable frequency generator, and the periphery of the heat-dissipating windows of the bottom plate is sealed by sealing foam. The heat emitted from the lower part of the crank case 15 is directly blown out of the whole machine by cooling air flowing out of the round hole at the lower part of the crank case 15.

The frequency converter wind scooper 7, the engine wind scooper 8, the cylinder head wind scooper 9, the crankcase 15, the engine side cover 14, the connecting cover 10 and the muffler shield form a main cooling air duct. The cooling air firstly cools the frequency converter after passing through the frequency converter air guide cover 7, then enters the engine through the engine air guide cover 8, and the temperature of the cooling air after cooling the engine is still lower than that of the tail gas of the engine, so that the cooling air can also cool the tail gas. The cooling air after cooling the engine enters the muffler shield through the connecting cover 10 to cool the muffler again, so as to prevent the muffler from being too high in temperature.

The motor cover plate 1, the motor rear cover 3, the cooling fan 4 and the engine side cover 14 form an auxiliary cooling air duct. Rotor 6 of motor also can produce the heat at the pivoted in-process, consequently need cool down rotor 6, this application is through installing cooling fan 4 at the afterbody of rotor 6, cooling fan 4 rotates along with rotor 6's rotation, cooling fan 4 rotates and gets into outside cold air wind from motor cover plate 1, to stator 5, rotor 6 cool down the back part and discharge through engine side lid 14, the part is discharged after mixing with the cooling air of cooling engine in connecting cover 10 again to the muffler.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A cooling air duct of a variable frequency generator is characterized by comprising a cylinder head air guide cover (9), a connecting cover (10), a silencer protective cover and an engine side cover (14), wherein the cylinder head air guide cover (9) is arranged outside an electric motor of the variable frequency generator, the electric motor is connected with a crank case (15), a silencer is arranged in the silencer protective cover, and the silencer is connected with an air outlet of the engine through a connecting pipe (11); the connecting cover (10) is sleeved outside the connecting pipe (11); the crankcase (15) is communicated with the cylinder head air guide cover (9), an engine side cover (14) is arranged on the side surface of the cylinder head air guide cover (9), and the engine side cover (14) is connected with the cylinder head air guide cover (9); the connecting cover (10) is connected with the cylinder head air guide cover (9) and the engine side cover (14), and the top of the connecting cover (10) is communicated with the muffler shield; the cylinder head air guide cover (9), the crankcase (15), the engine side cover (14), the connecting cover (10) and the silencer shield form a main cooling air channel.

2. The variable-frequency generator cooling air duct according to claim 1, further comprising a variable-frequency air guide cover (7) and an engine air guide cover (8), wherein one side of the engine air guide cover (8) is communicated with the variable-frequency air guide cover (7), and the other side is communicated with the crankcase (15).

3. The inverter generator cooling air duct according to claim 1, characterized in that the muffler shield comprises an upper cover (13) and a lower cover (12), and the connecting cover (10) is communicated with the lower cover (12).

4. The variable-frequency generator cooling air duct according to claim 1, further comprising a motor cover plate (1), a motor rear cover (3) and a cooling fan (4), wherein the motor cover plate (1) is installed at the front end of the motor, the motor rear cover (3) is sleeved outside the motor, the cooling fan (4) is installed at one side of the motor far away from the motor cover plate (1), and the motor rear cover (3) is communicated with the engine side cover (14); the motor cover plate (1), the motor rear cover (3), the cooling fan (4) and the engine side cover (14) form an auxiliary cooling air channel.

5. The inverter generator cooling air duct according to claim 4, characterized in that the side of the engine side cover (14) is provided with an air inlet (16).

6. The cooling air duct for variable frequency generators as claimed in claim 1, wherein the crankcase (15) is provided with a plurality of air inlets (17).

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