CN213205824U - Engine type variable frequency generator - Google Patents
Engine type variable frequency generator Download PDFInfo
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- CN213205824U CN213205824U CN202021536797.4U CN202021536797U CN213205824U CN 213205824 U CN213205824 U CN 213205824U CN 202021536797 U CN202021536797 U CN 202021536797U CN 213205824 U CN213205824 U CN 213205824U
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Abstract
The utility model discloses an engine type variable frequency generator, which comprises a frame, an engine, a generator driven by the engine, a frequency converter and an air cooling system; the air cooling system comprises a fan and a fan cover for guiding the flow direction of cooling air of the fan; the cooling air flow direction of the air guide opening is the axial direction of the engine; the utility model discloses a guide cooling wind is along axial flow's wind-guiding mouth structure, it is unanimous with fan casing cooling wind flow direction, flow out behind converging to engine silencer after comparatively smooth and easy completion cooling, accomplish the cooling of complete machine, cooling wind mutual noninterference, optimize the cooling wind flow direction, form better cooling effect to the converter, and simultaneously, the converter is relative with axial drainage cooling wind-guiding mouth, install in the frame, perhaps vertical horizontal space in the make full use of frame, simplify overall structure, make the generator whole more simple compact, more can exert small-size generator small, use nimble advantage.
Description
Technical Field
The utility model relates to a generator assembly, in particular to engine-type variable frequency generator.
Background
The small-sized general machinery has smaller volume and weight and is widely applied; for example, the small-sized variable-frequency fuel generator is more applied to the fields of family life and the like due to small volume and compact structure; because the generator adopts the engine as power, more heat is generated; the number of parts needing heat dissipation is large, such as an engine, an exhaust system, a frequency converter, a generator body and the like;
in the prior art, the heat dissipation of a small-sized variable frequency generator is mainly realized by the air cooling heat dissipation of the whole generator through a fan arranged at one end of the generator and the drainage of a fan cover; for the frequency converter arranged at the end part, heat dissipation can be achieved, but the installation mode cannot adapt to the flow direction of cooling air, so that the cooling effect is poor, the heat dissipation of the frequency converter is influenced, and the service life is further influenced; meanwhile, the length and the volume of the whole machine can be increased by installing the end parts. The prior art has an improved structure that a frequency converter is arranged inside a rack, an air outlet is formed in a fan cover for cooling, but the air outlet is formed in the fan cover and can only exhaust air along the circumferential direction of the rotation of a fan, so that the flow direction of the cooling air is inconsistent with the normal flow direction of the cooling air of equipment, mutual interference is caused, and the cooling effect is influenced; and this structure still needs the air-out guide structure of special design, increases the manufacturing degree of difficulty and raises the cost.
Therefore, the existing cooling structure of the generator frequency converter needs to be improved, the flow direction of cooling air is optimized, a better cooling effect is formed on the frequency converter, and meanwhile, the whole structure is simplified, so that the generator is simpler and more compact, and the advantages of small size and flexible application of the small generator can be exerted.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an engine-type variable frequency generator optimizes the cooling air flow direction, forms better cooling effect to the converter, simultaneously, simplifies overall structure for the generator is whole more simple compact, more can exert small-size generator small, use nimble advantage.
The engine type variable frequency generator of the utility model comprises a frame, an engine, a generator driven by the engine, a frequency converter and an air cooling system;
the air cooling system comprises a fan and a fan cover for guiding the flow direction of cooling air of the fan;
the cooling air flow direction of the air guide opening is the axial direction of the engine;
the installation structures of the engine and the generator on the frame are not described in detail herein; the fan is arranged at the end part of the side of the generator, and cooling air flows out after passing through the generator and the engine to finish cooling;
the air guide opening is generally arranged close to the joint part of the fan cover and the engine box body, an opening can be directly formed at the end part of the fan cover, an outward-protruding groove-shaped opening can be directly formed at the end part of the fan cover, and the air guide opening can also be formed by utilizing the structure of the engine box body, so that the description is omitted; the air guide port can be positioned at any position in the horizontal or vertical direction and is opposite to the installation position of the frequency converter, and the description is omitted;
the cooling air flows in the axial direction of the engine, which means that the cooling air flows in the axial direction, and does not necessarily flow in the coaxial axial direction of the engine, for example, the cooling air needs to incline towards the direction of the frequency converter, and the like, and the description is omitted here. The cooling air flow is arranged to be axial on the whole, so that the air outlet direction of the cooling air flow after the frequency converter is cooled is consistent with the air outlet direction after an engine or an exhaust system (or called a silencer) is cooled, and the defect that the air outlet after the frequency converter is cooled in the prior art is inconsistent is overcome.
Further, the fan cover is connected to the box body of the engine by adopting the bolt connection in the prior art, and details are not repeated herein, as shown in the figure, the fan cover is covered on the generator, and the opening at the end part is connected to the box body of the engine;
the air guide opening is formed in the engine box body and communicated with the interior of the fan cover, namely a notch is processed on the box body, so that the opening at the end part of the fan cover is exposed to the required size, namely the air guide opening is formed.
Furthermore, the air guide opening is formed by a notch arranged at the joint part of the engine box body and the fan cover, the notch is communicated with the inside of the fan cover and used for guiding out cooling air, the whole structure is simple, the original design is basically not changed, the manufacturing cost is saved, and the weight of the whole machine is reduced; the notch can be reserved directly when the box body is processed, and the fan cover is installed.
Furthermore, the mounting position of the frequency converter corresponds to the axial position of the engine, and a set distance is arranged between the mounting position of the frequency converter and the engine box body, so that cooling air can smoothly pass through the distance, and the heat dissipation of the engine cannot cause adverse effect on the frequency converter; in this way, the frequency converter can be arranged on the top side of the box body, on the vertical side of the box body adjacent to the top side of the box body, or on other suitable parts; the arrangement mode can be directly arranged on the engine, or arranged on the frame, or arranged on other parts (such as an oil tank) of the engine type generator, and no matter how the arrangement mode is adopted, the arrangement mode only needs to ensure that a proper distance is set between the frequency converter and the box body. The frequency converter is arranged, so that on one hand, the internal space of the existing frame can be effectively utilized, and the central line of the cooling surface of the frequency converter is consistent with the axial direction of the engine, so that the arrangement is more coordinated and reasonable, and the whole machine looks more compact and has more design aesthetic feeling and commodity; on the other hand, the cooling air from the air guide opening blows across the frequency converter cooling surface along the space between the frequency converter and the box body, and cools the frequency converter and simultaneously cools the engine box body (if the engine silencer is arranged on the engine side opposite to the fan cover, the outlet air after cooling the frequency converter and the box body further cools the silencer).
Furthermore, the air guide opening is formed in the upper portion of the engine box body, and the cooling surface of the frequency converter is installed on the upper portion of the rack in a downward mode, so that cooling air of the air guide opening blows to the cooling surface of the frequency converter, the upper space of the engine is fully utilized, and the whole structure is simple and compact.
Further, the frequency converter is mounted on the frame and located at the lower part of the oil tank, a common mechanical connection structure can be adopted, the frame is provided with a structure for supporting the oil tank, the frequency converter can be mounted on the structure, and a separate mounting structure is not required to be added.
Furthermore, the frequency converter is provided with a set number of mounting lugs in the circumferential direction and is mounted on the rack through damping pieces; as shown in the figure, the number of the mounting lugs is four, and the mounting lugs are distributed at four corners to complete mounting and supporting; the shock-absorbing member is generally a rubber pad, and is mounted on the frame through a bolt, which is not described in detail herein.
Furthermore, the notch used for forming the air guide opening on the engine box body is a notch groove along the axial direction and becomes shallow gradually along the flow direction of cooling air, the notch groove which becomes shallow gradually can effectively guide the cooling air to the oblique upper side, meanwhile, the cooling air cools the frequency converter and then flows to the silencer along the axial direction, the whole structure is arranged simply and orderly, and the cooling effect is better.
The utility model has the advantages that: the utility model discloses an engine-type variable frequency generator, adopt guide cooling air along the wind-guiding mouth structure of axial flow, it is unanimous with fan casing cooling air flow direction, flow out behind converging to the engine silencer after comparatively smooth and easy completion cooling, accomplish the cooling of complete machine, the cooling air mutual noninterference, optimize the cooling air flow direction, form better cooling effect to the converter, and simultaneously, the converter is relative with axial drainage cooling air wind-guiding mouth, install in the frame, perhaps vertical horizontal space in the make full use of frame, simplify overall structure, make the generator whole more simple compact, can exert small-size generator more small, use nimble advantage.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic perspective view (without a frame) of the present invention;
fig. 2 is a side view (without a frame) of the present invention;
fig. 3 is a schematic view of the whole structure of the present invention.
Detailed Description
Fig. 1 is the perspective structure schematic diagram (without frame) of the present invention, fig. 2 is the profile structure schematic diagram (without frame) of the present invention, fig. 3 is the structure schematic diagram of the whole machine of the present invention, as shown in the figure: the engine type variable frequency generator of the embodiment comprises a frame 9, an engine, a generator driven by the engine, a frequency converter 5 and an air cooling system; the air cooling system comprises a fan 2 and a fan cover 3 for guiding the flow direction of cooling air of the fan; the frequency converter further comprises an air guide port 4 for guiding cooling air to a cooling surface of the frequency converter, the flow direction of the cooling air of the air guide port 4 is the axial direction of the engine, and the axial direction of the engine is the axial direction of a crankshaft, namely the axial direction of the generator, and details are not repeated herein.
The installation structure of the engine and the generator on the frame 9 is not described in detail herein; in the embodiment, the generator is a rotor type generator and is connected with the crankshaft of the engine, the fan is arranged at the end part of the crankshaft of the engine adjacent to the generator, and cooling air flows out after passing through the generator and the engine to finish cooling.
The air guide opening 4 is generally arranged close to the joint part of the fan cover and the engine box body, an opening can be directly formed at the end part of the fan cover 3, a groove-shaped opening which is directly formed at the end part of the fan cover and protrudes outwards can also be formed by utilizing the structure of the engine box body, and the description is omitted; the air guide opening may be located at any position in the horizontal direction or the vertical direction (it may also be understood that the air guide opening may be actually adjacently disposed at any position of a joint portion of the fan cover and the engine case), and is opposite to the installation position of the frequency converter 5, which is not described herein again.
The cooling air flows in the axial direction of the engine, which means that the cooling air flows in the axial direction, and does not necessarily flow in the coaxial axial direction of the engine, for example, the cooling air needs to incline towards the direction of the frequency converter, and the like, and the description is omitted here. The cooling air flow is arranged to be axial on the whole, so that the air outlet direction of the cooling air flow after the frequency converter is cooled is consistent with the air outlet direction after an engine or an exhaust system (or called a silencer) is cooled, and the defect that the air outlet after the frequency converter is cooled in the prior art is inconsistent is overcome.
In this embodiment, the fan cover 3 is connected to the box 1 of the engine by using bolts in the prior art, which is not described herein, and as shown in the figure, the fan cover covers the generator, and the opening at the end is connected to the box of the engine.
The air guide opening 4 is formed in the engine box body 1 and communicated with the inside of the fan cover 3, namely a notch is processed on the box body 1, so that the opening at the end part of the fan cover 3 is exposed to the required size, namely the air guide opening is formed.
In the embodiment, the air guide opening 4 is formed by a notch arranged at the joint part of the engine box body 1 and the fan cover 3, the notch is communicated with the inside of the fan cover and used for guiding out cooling air, the whole structure is simple, the original design is basically not changed, the manufacturing cost is saved, and the weight of the whole machine is reduced; the notch can be reserved directly when the box body is processed, and the fan cover is installed.
In this embodiment, the air guiding opening 4 is formed at the upper part of the engine box body, as shown in the figure, the notch is directly formed on the upper surface of the engine box body, and the cooling surface of the frequency converter 5 is installed at the upper part of the frame 9 in a downward direction, so that the cooling air of the air guiding opening 4 blows to the cooling surface of the frequency converter, the upper space of the engine is fully utilized, and the whole structure is simple and compact.
In the embodiment, the installation position of the frequency converter 5 corresponds to the axial position of the engine, and a set distance is arranged between the frequency converter and the engine box body 1, so that cooling air can smoothly pass through the distance, and the heat dissipation of the engine cannot cause adverse effect on the frequency converter; the frequency converter 5 is mounted at a position corresponding to the engine, which means that the mounting position corresponds to the engine at the circumferential position of the engine, and is not described herein again; in this way, the frequency converter can be arranged on the top side of the box body, on the vertical side of the box body adjacent to the top side of the box body, or on other suitable parts; the arrangement mode can be directly arranged on the engine, or arranged on the frame, or arranged on other parts (such as an oil tank) of the engine type generator, and no matter how the arrangement mode is adopted, the arrangement mode only needs to ensure that a proper distance is set between the frequency converter and the box body. The frequency converter is arranged, so that on one hand, the internal space of the existing frame can be effectively utilized, and the central line of the cooling surface of the frequency converter is consistent with the axial direction of the engine, so that the arrangement is more coordinated and reasonable, and the whole machine looks more compact and has more design aesthetic feeling and commodity; on the other hand, the cooling air from the air guide opening blows across the frequency converter cooling surface along the space between the frequency converter and the box body, and cools the frequency converter and simultaneously cools the engine box body (if the engine silencer is arranged on the engine side opposite to the fan cover, the outlet air after cooling the frequency converter and the box body further cools the silencer).
In this embodiment, the frequency converter 5 is mounted on the frame 9 and located at the lower part of the oil tank, and a common mechanical connection structure may be adopted, and the frame is provided with a structure for supporting the oil tank 10, and the frequency converter 5 may be mounted on the structure without adding a separate mounting structure.
In this embodiment, the frequency converter 5 is provided with a set number of mounting lugs 6 in the circumferential direction and is mounted on the rack through a damping piece 7; as shown in the figure, the number of the mounting lugs is four, and the mounting lugs are distributed at four corners to complete mounting and supporting; the shock-absorbing member is generally a rubber pad, and is mounted on the frame through a bolt, which is not described in detail herein.
In this embodiment, the notch used for forming the air guide opening 4 on the engine case 1 is a notch groove along the axial direction and becomes shallow gradually along the flow direction of the cooling air, the notch groove which becomes shallow gradually can effectively guide the cooling air obliquely upward, and meanwhile, the cooling air cools the frequency converter and then flows to the silencer along the axial direction, so that the whole structure is simple and regular in arrangement, and the cooling effect is better.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (8)
1. An engine-type variable frequency generator, characterized in that: the system comprises a frame, an engine, a generator driven by the engine, a frequency converter and an air cooling system;
the air cooling system comprises a fan and a fan cover for guiding the flow direction of cooling air of the fan;
the cooling air flow direction of the air guide opening is the axial direction of the engine.
2. The engine-driven variable frequency generator of claim 1, wherein: the fan cover is connected to a box body of the engine;
the air guide opening is formed in a box body of the engine.
3. The engine-driven variable frequency generator of claim 1, wherein: the air guide opening is formed by a notch arranged at the joint of the engine box body and the fan cover, and the notch is communicated with the inside of the fan cover and used for guiding out cooling air.
4. An engine-type variable frequency generator according to claim 1, 2 or 3, wherein: the mounting position of the frequency converter corresponds to the axial position of the engine and a set distance is arranged between the mounting position of the frequency converter and the engine box body.
5. The engine-driven variable frequency generator of claim 3, wherein: the air guide opening is formed in the upper portion of the engine box body, and the cooling surface of the frequency converter is installed on the upper portion of the rack in a downward mode, so that cooling air of the air guide opening blows towards the cooling surface of the frequency converter.
6. The engine-driven variable frequency generator of claim 1, wherein: the frequency converter is arranged on the rack and is positioned at the lower part of the oil tank.
7. The engine-driven variable frequency generator of claim 6, wherein: the frequency converter is provided with a set number of mounting lugs in the circumferential direction and is mounted on the rack through a damping piece.
8. The engine-driven variable frequency generator of claim 3, wherein: the notch used for forming the air guide opening on the engine box body is a notch groove along the axial direction and becomes shallow gradually along the flow direction of cooling air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021536797.4U CN213205824U (en) | 2020-07-29 | 2020-07-29 | Engine type variable frequency generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021536797.4U CN213205824U (en) | 2020-07-29 | 2020-07-29 | Engine type variable frequency generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213205824U true CN213205824U (en) | 2021-05-14 |
Family
ID=75836944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021536797.4U Active CN213205824U (en) | 2020-07-29 | 2020-07-29 | Engine type variable frequency generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213205824U (en) |
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2020
- 2020-07-29 CN CN202021536797.4U patent/CN213205824U/en active Active
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