CN220896466U - Variable frequency generator - Google Patents
Variable frequency generator Download PDFInfo
- Publication number
- CN220896466U CN220896466U CN202322648537.6U CN202322648537U CN220896466U CN 220896466 U CN220896466 U CN 220896466U CN 202322648537 U CN202322648537 U CN 202322648537U CN 220896466 U CN220896466 U CN 220896466U
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- Prior art keywords
- cooling
- fin group
- frequency converter
- cooling fin
- fan
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- 238000001816 cooling Methods 0.000 claims abstract description 97
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000003584 silencer Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model discloses a variable frequency generator, which comprises an engine, a fan assembly, a stator and rotor assembly driven by the engine and a frequency converter electrically connected with the stator and rotor assembly, wherein a frequency converter cover is arranged on the outer side of the frequency converter, the fan assembly comprises blades and a fan cover, and the fan cover is connected with the frequency converter cover through a ventilation pipeline; wherein: the blades comprise a division plate, a first cooling fin group and a second cooling fin group, and the first cooling fin group and the second cooling fin group are respectively positioned at two sides of the division plate; the first cooling fin group and one side of the fan cover, which is connected with the frequency converter cover, form a first cooling cavity, and the second cooling fin group and the other side of the fan cover form a second cooling cavity. According to the utility model, the stator and rotor components are cooled by the second cooling cavity, the frequency converter is cooled by the first cooling cavity, and the mutual influence of two groups of cooling wind is avoided, so that the cooling effect on the frequency converter and the stator and rotor components can be ensured, and the service life of the generator is prolonged.
Description
Technical Field
The utility model relates to a variable frequency generator, in particular to a variable frequency generator with a cooling mechanism.
Background
The variable frequency generator is used as a generator capable of changing frequency, and the working rotation speed of the engine can be changed in a larger range, so that the variable frequency generator can be well matched with the generator, and the purpose of saving fuel is achieved. When the conventional generator set is operated, the engine, the stator and rotor units and the variable frequency controller can generate certain heat, if heat cannot be dissipated timely, the power of the generator set can be reduced in short-term use, and the service life of the generator set can be shortened in long-term use.
Chinese patent document CN102035304B discloses a digital variable frequency generator set, and discloses a technology that a crankshaft of an engine set rotates with a fan 11, and after cooling air flows in from a first through hole 103 on a control panel 1 and/or from a second through hole 501 arranged on a side wall of a wind scooper 5, the cooling air is forced to pass through a frequency converter cooling clamping cavity 35 formed by surrounding a wind scooper baffle 203 and frequency converter cooling teeth 301, so as to take away heat on a frequency converter cooling fin 3, thereby cooling a frequency converter 4. The air flow from the frequency converter cooling clamp cavity 35 flows through the hose 6 and the joint 7 under the flow guide of the air guide groove 201 of the air guide frame 2, and flows into the generator cooling protection frame 8 to cool the generator 12.
This prior art has the following disadvantages: the digital variable frequency generator set has the problem that the generator is not enough in cooling in the operation process, and particularly, under high-load operation, the problem that the generator is still short in service life due to power reduction setting can still occur due to the fact that the generator is not enough in cooling.
Disclosure of utility model
The utility model provides a variable frequency generator for solving the technical problem of insufficient cooling of a generator in the prior art, which comprises an engine, a fan assembly, a stator and rotor assembly driven by the engine and a frequency converter electrically connected with the stator and rotor assembly, wherein a frequency converter cover is arranged on the outer side of the frequency converter, the fan assembly comprises blades and a fan cover, and the fan cover is connected with the frequency converter cover through a ventilation pipeline; wherein: the blades comprise a division plate, a first cooling fin group and a second cooling fin group, and the first cooling fin group and the second cooling fin group are respectively positioned at two sides of the division plate; the first cooling fin group and one side of the fan cover, which is connected with the frequency converter cover, form a first cooling cavity, and the second cooling fin group and the other side of the fan cover form a second cooling cavity.
After analysis of the problem of insufficient cooling in the prior art, it is found that the air flow entering the generator for cooling in the prior art firstly passes through the frequency converter, the temperature of the air flow rises to become hot air after passing through the frequency converter, and finally the air flow entering the generator for cooling is essentially hot air with the temperature rising, so that the problem of insufficient cooling is caused. Especially under the condition of high-load operation of the generator set, the higher the temperature of the frequency converter is, the higher the temperature of air flow entering the generator set is, the cooling effect is seriously affected, and vicious circle is formed.
In this scheme, utilize two kinds of fin group on the blade to form different cooling chamber respectively, wherein first cooling chamber can cool off the converter, and the second cooling chamber cools off stator-rotor subassembly, utilize two cooling chamber to cool off converter and stator-rotor subassembly respectively, promptly, utilize solitary air current to cool off converter and stator-rotor subassembly respectively, the air current when just not having the cooling also is the problem of temperature after the intensification to can guarantee the cooling effect to converter and stator-rotor subassembly, and then can prolong generating set's life.
Preferably, the fan housing is provided with an air outlet along a tangential direction, and the air outlet is communicated with the first cooling cavity and the second cooling cavity.
Preferably, a first air inlet communicated with the first cooling cavity is formed in one side, facing the first cooling fin group, of the fan cover, and the first air inlet is communicated with the frequency converter cover through an air duct. In this scheme, the setting of first air intake has guaranteed the cooling effect to the converter.
Preferably, the fan housing is provided with a first air outlet communicating with the first cooling cavity in a tangential direction. In this scheme, the design of first air outlet position can improve cooling efficiency.
Preferably, the engine is connected with a muffler, and the first air outlet is arranged towards the muffler. In this scheme, after setting up the air outlet towards the silencer, the air current that has cooled the converter is led first air outlet and towards the silencer, and because the temperature of silencer is very high, can be higher than the temperature of the air current after being heated by the converter, consequently blows the air current to the silencer and also can cool off the silencer.
Preferably, the blades are located on the side of the stator-rotor assembly facing the frequency converter. In this scheme, set up the blade in stator and rotor subassembly one side towards the converter can avoid stator and rotor subassembly and the cooling of converter to influence each other to guaranteed the cooling effect to stator and rotor subassembly and converter.
Preferably, a second air inlet communicated with the second cooling cavity is formed in one side, facing the second cooling fin group, of the fan cover. In this scheme, the setting of second air intake has guaranteed the cooling effect to stator rotor subassembly.
Preferably, the fan housing is further provided with a second air outlet communicated with the second cooling cavity along the tangential direction, and the second air outlet is arranged in parallel with the first air outlet.
Preferably, the first air outlet and the second air outlet are respectively arranged towards different positions of the muffler. In this scheme, the setting of first air outlet and second air outlet towards the different positions of silencer can realize the better cooling effect to the silencer.
The utility model has the following beneficial effects:
1. According to the utility model, the stator and rotor components are cooled by the second cooling cavity, the frequency converter is cooled by the first cooling cavity, and the mutual influence of two groups of cooling wind is avoided, so that the cooling effect on the frequency converter and the stator and rotor components can be ensured, and the service life of the generator is prolonged.
2. In the utility model, the muffler is also cooled, and the service life of the muffler can be prolonged.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a variable frequency generator of the present utility model;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view ① of FIG. 1;
Fig. 4 is a cross-sectional view ② of fig. 1.
Detailed Description
The following is a further detailed description of the embodiments:
1. Definition of the definition
Cooling fin group: comprising a plurality of cooling fins.
2. Reference numerals in the drawings of the specification include: the engine 1, the stator and rotor assembly 2, the second cooling fin group 3, the partition plate 4, the first cooling fin group 5, the first air inlet 7, the fan housing 6, the ventilation pipeline 8, the frequency converter housing 9, the frequency converter 10, the muffler 11, the first air outlet 12, the second air inlet 13 and the second air outlet 14.
An example is substantially as shown in figures 1 to 4 of the accompanying drawings: the utility model provides a variable frequency generator, including engine 1, silencer 11, fan subassembly, by the stator and rotor subassembly 2 of engine 1 drive and stator and rotor subassembly 2 electrically connected's converter 10, the converter 10 outside is equipped with converter cover 9, and the fan subassembly includes blade and fan housing 6, is equipped with the space between fan housing 6 inner wall and the blade, and the blade is located stator and rotor subassembly 2 towards one side of converter 10, and fan housing 6 is connected with converter cover 9 through ventilation pipe 8. The stator-rotor assembly 2 includes a stator and a rotor, and the fan assembly is connected to the rotor. In other embodiments, the vane may be provided on the crankshaft of the engine 1 on the side of the stator-rotor assembly 2 opposite to the engine 1.
The blades comprise a division plate 4, a first cooling fin group 5 and a second cooling fin group 3, wherein the first cooling fin group 5 and the second cooling fin group 3 are respectively positioned at two sides of the division plate 4, specifically, the first cooling fin group 5 is positioned at the right side of the division plate 4, and the second cooling fin group 3 is positioned at the left side of the division plate 4; a second air inlet 13 communicated with a second cooling cavity is formed in one side, facing the second cooling fin group 3, of the fan housing 6, and the second cooling fin group 3 and the left side of the fan housing 6 form a second cooling cavity; the fan housing 6 is provided with a first air inlet 7 communicated with the first cooling cavity on one side facing the first cooling fin group 5, the first air inlet 7 is communicated with the frequency converter housing 9 through an air duct 8, and the first cooling fin group 5 and the right side of the fan housing 6 form the first cooling cavity.
The fan housing 6 is provided with a first air outlet 12 communicated with the first cooling cavity and a second air outlet 14 communicated with the second cooling cavity along the tangential direction, the first air outlet 12 and the second air outlet 14 are arranged in parallel, and the first air outlet 12 and the second air outlet 14 are arranged towards different positions of the muffler 11 to cool the different positions of the muffler 11. The first air outlet 12 and the second air outlet 14 are located at one side of the first air inlet 7 and the second air inlet 13.
The specific implementation process is as follows: when the variable frequency generator operates, the fan assembly rotates, and air flow near the second air inlet 13 is sucked into the second cooling cavity through the second air inlet 13 to cool the stator and rotor assembly 2 and then blown out from the second air outlet 14; the air flow near the frequency converter 10 is sucked into the frequency converter cover 9 to cool the frequency converter 10, then is sucked into the first cooling cavity of the fan cover 6 through the air duct 8 and the first air inlet 7, and is blown out through the first air outlet 12. The air flow blown out from the first air outlet 12 and the second air outlet 14 cools the muffler 11 again.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present utility model, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. The variable frequency generator comprises an engine, a fan assembly, a stator and rotor assembly driven by the engine and a frequency converter electrically connected with the stator and rotor assembly, wherein a frequency converter cover is arranged on the outer side of the frequency converter, the fan assembly comprises blades and a fan cover, and the fan cover is connected with the frequency converter cover through a ventilation pipeline; the method is characterized in that: the blade comprises a division plate, a first cooling fin group and a second cooling fin group, wherein the first cooling fin group and the second cooling fin group are respectively positioned at two sides of the division plate; the first cooling fin group and the fan cover are connected with one side of the frequency converter cover to form a first cooling cavity, and the second cooling fin group and the other side of the fan cover to form a second cooling cavity.
2. The variable frequency generator of claim 1, wherein: the fan housing is provided with a first air inlet communicated with the first cooling cavity on one side facing the first cooling fin group, and the first air inlet is communicated with the frequency converter housing through the ventilation pipeline.
3. A variable frequency generator according to claim 1 or 2, characterized in that: the fan housing is provided with a first air outlet communicated with the first cooling cavity along the tangential direction.
4. A variable frequency generator according to claim 3, wherein: the engine is connected with a muffler, and the first air outlet is arranged towards the muffler.
5. The variable frequency generator of claim 4, wherein: the blade is located on one side of the stator and rotor assembly, which faces the frequency converter.
6. The variable frequency generator of claim 5, wherein: and a second air inlet communicated with the second cooling cavity is formed in one side, facing the second cooling fin group, of the fan cover.
7. The variable frequency generator of claim 6, wherein: the fan housing is also provided with a second air outlet communicated with the second cooling cavity along the tangential direction, and the second air outlet and the first air outlet are arranged in parallel.
8. The variable frequency generator of claim 7, wherein: the first air outlet and the second air outlet are respectively arranged towards different positions of the muffler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648537.6U CN220896466U (en) | 2023-09-28 | 2023-09-28 | Variable frequency generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648537.6U CN220896466U (en) | 2023-09-28 | 2023-09-28 | Variable frequency generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220896466U true CN220896466U (en) | 2024-05-03 |
Family
ID=90837772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322648537.6U Active CN220896466U (en) | 2023-09-28 | 2023-09-28 | Variable frequency generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220896466U (en) |
-
2023
- 2023-09-28 CN CN202322648537.6U patent/CN220896466U/en active Active
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