CN211550085U - Sanitation vehicle, centrifugal fan and induced air cooling structure thereof - Google Patents
Sanitation vehicle, centrifugal fan and induced air cooling structure thereof Download PDFInfo
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- CN211550085U CN211550085U CN202020020861.7U CN202020020861U CN211550085U CN 211550085 U CN211550085 U CN 211550085U CN 202020020861 U CN202020020861 U CN 202020020861U CN 211550085 U CN211550085 U CN 211550085U
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Abstract
The utility model discloses a sanitation vehicle, a centrifugal fan and an induced air cooling structure thereof, wherein the induced air cooling structure comprises an induced air channel, the induced air channel is arranged between a housing and a motor of the centrifugal fan, an inlet of the induced air channel is arranged between the housing and/or the housing and a volute of the centrifugal fan, and an outlet of the induced air channel is arranged on the volute and is communicated with an inner cavity of the volute of the centrifugal fan; above-mentioned centrifugal fan induced air cooling structure need not to increase extra motor, water route isotructure, utilizes the produced negative pressure induced air heat dissipation of centrifugal fan, and simple structure, compactness, manufacturing cost, use cost and maintenance cost have obtained fine control, have realized the motor induced air heat dissipation under the prerequisite of guaranteeing to satisfy the motor heat dissipation demand, not influencing centrifugal fan original aerodynamic performance notably.
Description
Technical Field
The utility model relates to a centrifugal fan technical field, in particular to sanitation vehicle, centrifugal fan and induced air cooling structure thereof.
Background
For a pure electric environmental sanitation vehicle adopting pneumatic suction and pick-up operation, a centrifugal fan is an indispensable device, a motor is used as a necessary power source, and due to the fact that the motor is high in power and serious in heating, the motor must be cooled and radiated by adopting effective means.
At present, two types of cooling modes are universal, one type is a water cooling mode, a set of waterway system needs to be designed, parts such as a water pump, a water pipe and a valve are inevitably needed, the manufacturing cost of a product is increased, and the later maintenance cost of the product is also increased; the other type is an air cooling mode, a fan for heat dissipation is specially designed on one side of the motor, the overall dimension of the motor and the energy consumption of the motor are increased, the motor is not suitable for compact environmental sanitation vehicle arrangement, and the manufacturing cost and the subsequent maintenance cost are also increased.
SUMMERY OF THE UTILITY MODEL
In view of this, one of the objectives of the present invention is to provide an induced air cooling structure for a centrifugal fan, so as to provide a compact, simple, and low-cost cooling method, thereby reducing the manufacturing cost and the post-maintenance cost of the product.
Another object of the utility model is to provide a centrifugal fan and sanitation vehicle based on above-mentioned centrifugal fan induced air cooling structure.
In order to achieve the above object, the utility model provides a following technical scheme:
the centrifugal fan induced air cooling structure comprises an induced air channel arranged between a housing and a motor of a centrifugal fan, wherein an inlet of the induced air channel is arranged between the housing and/or the housing and a volute of the centrifugal fan, and an outlet of the induced air channel is arranged on the volute and communicated with an inner cavity of the volute of the centrifugal fan.
Preferably, the induced air channel has a water-proof structure for preventing water from entering the position of the motor.
Preferably, the inlet of the induced draft passage is arranged in a horizontal direction, a vertically downward direction, or an obliquely downward direction.
Preferably, the outlet of the induced air channel is provided to the volute next to the motor.
Preferably, the housing includes a waterproof cover and an air-inducing cover, the air-inducing cover surrounds the motor, the waterproof cover is buckled outside the air-inducing cover and the motor, a cavity between the waterproof cover and the air-inducing cover and a cavity between the air-inducing cover and the motor are communicated to form the air-inducing channel.
Preferably, an inlet of the induced draft passage is formed between the waterproof cover and the scroll casing.
Preferably, a plurality of outlets of the induced draft passage are provided, and each outlet is circumferentially and uniformly arranged on the volute between the induced draft cover and the motor.
Preferably, the number and diameter of the outlets are such that:
Qf/△P＝20.5nπD1 2/4 (1)
Qf＝Φ/ρCp△t (2)
△P＝P0-P1(3)
in the formula: p0Inlet air pressure of air induction channel, P1Is the pressure of the inner cavity of the volute casing, QfPhi is the heat dissipation power, rho is the air density, C for the required heat dissipation air flowpFor the specific heat of air, △ t is the difference between the allowable motor temperature and the ambient temperature, n is the number of outlets, D1Is the outlet diameter.
Preferably, the diameter D of the wall surface of the housing adjacent to the motor2And the diameter D of the housing of the motor3Satisfies D2/D3＝1.15-1.2。
A centrifugal fan comprises the centrifugal fan induced air cooling structure.
A sanitation vehicle comprising a centrifugal fan as described above.
In order to achieve the above object, the present invention provides an induced air cooling structure of a centrifugal fan, which includes an induced air channel, the induced air channel is disposed between a housing and a motor of the centrifugal fan, an inlet of the induced air channel is disposed between the housing and/or the housing and a volute of the centrifugal fan, and an outlet of the induced air channel is opened in the volute and is communicated with an inner cavity of the volute of the centrifugal fan; when the centrifugal fan operates, static pressure inside the volute of the centrifugal fan is distributed in a step shape from the center position of the volute to the periphery, the closer to the center position of the volute, the larger the negative pressure is, the atmospheric pressure outside the volute exists, and pressure difference exists between the pressure difference and the inner cavity of the volute; when the rotating speed of the motor is higher, the heat power of the motor is higher, the absolute value of the negative pressure in the inner cavity of the volute of the centrifugal fan is larger, namely the pressure difference with the outside is larger, the flow of the heat dissipation gas is also larger, and therefore the self-adaptive dynamic relation between the flow of the heat dissipation gas and the heat dissipation power is formed; therefore, the centrifugal fan induced air cooling structure does not need to be additionally provided with additional structures such as a motor and a water path, negative pressure induced air generated by the centrifugal fan is utilized for heat dissipation, the structure is simple and compact, the manufacturing cost, the use cost and the maintenance cost are well controlled, and the motor induced air heat dissipation is realized on the premise that the heat dissipation requirement of the motor is met and the original pneumatic performance of the centrifugal fan is not remarkably influenced.
The utility model also provides a centrifugal fan and sanitation vehicle, this centrifugal fan and sanitation vehicle all are based on above-mentioned centrifugal fan induced air cooling structure, because above-mentioned centrifugal fan induced air cooling structure has above-mentioned beneficial effect, then adopt this centrifugal fan induced air cooling structure's centrifugal fan and sanitation vehicle also should have the same beneficial effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an isometric view of a centrifugal fan provided in an embodiment of the present invention;
fig. 2 is a front view of a centrifugal fan according to an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A of FIG. 2;
fig. 4 is a partial enlarged view of an induced air cooling structure of a centrifugal fan according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sanitation vehicle according to an embodiment of the present invention.
In the figure:
1 is a volute; 2 is a housing; 201 is a waterproof cover; 202 is an induced draft cover; 3 is an impeller; 4 is a motor; 5 is an induced air channel; 6 is an environmental sanitation vehicle; and 7, a centrifugal fan.
Detailed Description
The utility model discloses an one of the core is in providing a centrifugal fan induced air cooling structure, and this centrifugal fan induced air cooling structure's structural design makes it form a compact, simple, low cost's cooling method, helps realizing the reduction of product manufacturing cost and later maintenance cost.
The utility model discloses an another core lies in providing a centrifugal fan and sanitation vehicle based on above-mentioned centrifugal fan induced air cooling structure.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, fig. 1 is an isometric view of a centrifugal fan provided in an embodiment of the present invention, fig. 2 is a front view of a centrifugal fan provided in an embodiment of the present invention, fig. 3 is a sectional view of a direction a of fig. 2, and fig. 4 is a partial enlarged view of an induced air cooling structure of a centrifugal fan provided in an embodiment of the present invention.
The embodiment of the utility model provides a pair of centrifugal fan induced air cooling structure, this centrifugal fan induced air cooling structure include induced air passageway 5, and this induced air passageway 5 sets up between housing 2 and motor 4 of centrifugal fan 7, and the import of induced air passageway 5 sets up between housing 2 and/or housing 2 and centrifugal fan 7's spiral case 1, and the export of induced air passageway 5 is seted up in spiral case 1 and is communicate with centrifugal fan 7's spiral case 1 inner chamber.
Compared with the prior art, the embodiment of the utility model provides a centrifugal fan induced air cooling structure is when centrifugal fan 7 moves, and the inside static pressure of spiral case 1 of centrifugal fan 7 puts to being the echelonment distribution all around from spiral case 1 central point, is close to spiral case 1 central point more and puts, and negative pressure P1The larger the pressure is, the atmospheric pressure P is outside the volute 10As shown in fig. 4, there is a pressure difference between the outside of the volute 1 and the inner cavity of the volute 1, and under the action of the pressure difference, the heat dissipation airflow is introduced into the induced air channel 5 from the outside and flows through the housing of the motor 4 to realize heat dissipation of the motor 4, and finally the heat dissipation airflow is discharged to the ambient atmosphere along with the main airflow; when the rotating speed of the motor 4 is higher, the thermal power of the motor 4 is higher, and the absolute value of the negative pressure in the inner cavity of the volute 1 of the centrifugal fan 7 is higher, namely the pressure difference with the outside is higher, the flow of the heat-dissipating gas is higher, so that the self-adaptive dynamic relation between the flow of the heat-dissipating gas and the heat-dissipating power is formed; therefore, the centrifugal fan induced air cooling structure does not need to be additionally provided with additional structures such as the motor 4 and a water path, negative pressure induced air generated by the centrifugal fan 7 is utilized for heat dissipation, the structure is simple and compact, the manufacturing cost, the use cost and the maintenance cost are well controlled, and the induced air heat dissipation of the motor 4 is realized on the premise that the heat dissipation requirement of the motor 4 is met and the original pneumatic performance of the centrifugal fan 7 is not remarkably influenced.
It can be understood that, because the centrifugal fan induced air cooling structure that the present case provided mainly is to the heat dissipation of the centrifugal fan 7 on the sanitation vehicle 6 of outdoor use, when guaranteeing the heat dissipation, still need to possess certain waterproof function to avoid water to get into motor 4 place position when rainy day and automobile body wash, for this reason the utility model discloses in the embodiment, induced air passageway 5 has the structure of preventing into water that prevents that water from getting into motor 4 place position, should prevent into water the structure can be set up in baffle, stand pipe, labyrinth seal structure etc. of induced air passageway 5 import department.
Of course, the water inlet prevention structure may be disposed on the installation position of the centrifugal fan, or between the installation position of the centrifugal fan and the centrifugal fan, and the water inlet prevention structure may be disposed on the body of the sanitation vehicle, taking the sanitation vehicle with the centrifugal fan as an example.
Further, the inlet of the air inducing channel 5 is arranged in a horizontal direction, a vertically downward direction or an obliquely downward direction to avoid water from entering the position of the motor 4 along the air inducing channel 5.
Preferably, the outlet of the induced air channel 5 is arranged in the volute 1 close to the motor 4, so as to ensure that the induced heat dissipation airflow can be close to the motor 4 to perform sufficient heat exchange with the motor 4.
Specifically, in the embodiment of the present invention, as shown in fig. 3, the housing 2 is a double-layer structure, and includes a waterproof cover 201 and an air-inducing cover 202, the air-inducing cover 202 is in a cylindrical shape with two open ends and is disposed around the motor 4, one end of the air-inducing cover 202 is connected to the volute 1, the waterproof cover 201 is fastened outside the air-inducing cover 202 and the motor 4, a cavity between the waterproof cover 201 and the air-inducing cover 202 and a cavity between the air-inducing cover 202 and the motor 4 are communicated through a gap between the other end of the air-inducing cover 202 and the waterproof cover 201 to form an air-inducing channel 5, an inlet of the air-inducing channel 5 is formed between the wind-inducing cover and the volute 1, when in use, a heat-dissipating airflow flows in a horizontal direction, then bends upward to enter an inlet section of the air-inducing channel 5, and then bends downward under the action of the waterproof cover 201 to enter an annular cavity between the air, through the double-layer structure, the air inducing channel 5 is integrally formed into a labyrinth seal structure, and the function of preventing water from entering is achieved.
Of course, the structure of the cover 2 is not limited to the double-layer structure shown in the drawing, and a single-layer structure or a multi-layer structure may be adopted, which is not limited herein.
Preferably, the outlet of the induced air channel 5 is provided in plurality, and each outlet is uniformly arranged on the volute 1 between the induced air cover 202 and the motor 4 along the circumferential direction.
In order to effectively realize air cooling and heat dissipation of the motor 4 on the premise of not affecting the performance of the centrifugal fan 7 for the sanitation vehicle, the diameter and the number of the outlets of the induced air channel 5 need to satisfy the following constraint relation:
Qf/△P＝20.5nπD1 2/4 (1)
Qf＝Φ/ρCp△t (2)
△P＝P0-P1(3)
in the formula: p0Air pressure, P, at inlet of air inducing channel 51Is the air pressure of the inner cavity of the volute 1, QfPhi is the heat dissipation power, rho is the air density, C for the required heat dissipation air flowp△ t is the difference between the allowable temperature of the motor 4 and the ambient temperature for the specific heat of air, n is the number of outlets, D1Is the outlet diameter.
Preferably, the diameter D of the wall of the housing 2 adjacent to the motor 42And the diameter D of the housing of the motor 43Satisfies D2/D31.15-1.2 to ensure that the air flow is close to the motor 4 housing.
Further, in the embodiment of the present invention, the diameter D of the waterproof cover 2014Is smaller than the diameter D of the impeller 3 of the centrifugal fan 75To ensure the compact overall design of the centrifugal fan 7.
Taking the motor 4 of the centrifugal fan 7 with 10KW running power as an example, the heat dissipation power of the motor 4 is 423W, and the maximum allowable temperature of the motor 4 is about 95 ℃ according to Qf＝Φ/ρCp△ t, the required heat dissipation air flow is about 0.006m/s, and when the shaft power of the centrifugal fan 7 is about 10kw, the main steam flow is about 1.6m/s, and the air flow consumed by heat dissipation is about 0.3%, therefore, the effect of the arrangement of the air inducing channel 5 on the fan performance is negligible.
Based on above-mentioned centrifugal fan induced air cooling structure, the utility model also provides a centrifugal fan 7, centrifugal fan 7 includes spiral case 1, impeller 3, motor 4 and transmission and motor 4 housing 2, wherein, be provided with as above arbitrary centrifugal fan induced air cooling structure between motor 4 and motor 4 housing 2, centrifugal fan induced air cooling structure in the above-mentioned embodiment need not to set up extra motor 4 and water route, can not lead to the increase of centrifugal fan 7 consumption, can not cause the appearance and the performance of centrifugal fan 7 yet and show the influence, help realizing the whole compact overall arrangement of sanitation vehicle 6.
Further, based on above-mentioned centrifugal fan 7, as shown in fig. 5, the embodiment of the utility model provides a sanitation vehicle 6 is still provided, sanitation vehicle 6 includes centrifugal fan 7 as above, and this centrifugal fan 7 sets up in sanitation vehicle 6's top, through setting up this centrifugal fan 7, need not again additionally to set up the part on sanitation vehicle 6 and dispel the heat to centrifugal fan 7, does benefit to each spare part of compact sanitation vehicle 6 and arranges.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. The centrifugal fan induced air cooling structure is characterized by comprising an induced air channel arranged between a housing of a centrifugal fan and a motor, wherein an inlet of the induced air channel is arranged between the housing and/or the housing and a volute of the centrifugal fan, and an outlet of the induced air channel is arranged on the volute and communicated with an inner cavity of the volute of the centrifugal fan.
2. The centrifugal fan induced air cooling structure of claim 1, wherein the induced air passage has a water-ingress prevention structure for preventing water from entering a position where the motor is located.
3. The centrifugal fan induced air cooling structure according to claim 1, wherein an inlet of the induced air passage is provided in a horizontal direction, a vertically downward direction, or an obliquely downward direction.
4. The centrifugal fan induced air cooling structure according to claim 1, wherein an outlet of the induced air passage is provided to the volute in close proximity to the motor.
5. The centrifugal fan induced air cooling structure according to any one of claims 1 to 4, wherein the housing includes a waterproof cover and an induced air cover, the induced air cover is disposed around the motor, the waterproof cover is fastened outside the induced air cover and the motor, and a cavity between the waterproof cover and the induced air cover and a cavity between the induced air cover and the motor are communicated to form the induced air passage.
6. The centrifugal fan induced air cooling structure according to claim 5, wherein an inlet of the induced air passage is formed between the waterproof cover and the scroll casing.
7. The centrifugal fan induced air cooling structure according to claim 5, wherein a plurality of outlets of the induced air passage are provided, and each outlet is circumferentially and uniformly arranged on the volute between the induced air cover and the motor.
8. The centrifugal fan induced air cooling structure according to claim 6, wherein the number and diameter of the outlets satisfy:
Qf/△P＝20.5nπD1 2/4 (1)
Qf＝Φ/ρCp△t (2)
△P＝P0-P1(3)
in the formula: p0Inlet air pressure of air induction channel, P1Is the pressure of the inner cavity of the volute casing, QfPhi is the heat dissipation power, rho is the air density, C for the required heat dissipation air flowpFor the specific heat of air, △ t is the difference between the allowable motor temperature and the ambient temperature, n is the number of outlets, D1Is the outlet diameter.
9. According to any of claims 1-4 and 6-8The centrifugal fan induced air cooling structure is characterized in that the diameter D of the wall surface of the housing adjacent to the motor2And the diameter D of the housing of the motor3Satisfies D2/D3＝1.15-1.2。
10. A centrifugal fan comprising the centrifugal fan induced air cooling structure according to any one of claims 1 to 9.
11. A sanitation vehicle, characterized in that the sanitation vehicle comprises a centrifugal fan according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020020861.7U CN211550085U (en) | 2020-01-02 | 2020-01-02 | Sanitation vehicle, centrifugal fan and induced air cooling structure thereof |
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|---|---|---|---|
| CN202020020861.7U CN211550085U (en) | 2020-01-02 | 2020-01-02 | Sanitation vehicle, centrifugal fan and induced air cooling structure thereof |
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| CN211550085U true CN211550085U (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046199A (en) * | 2021-10-29 | 2022-02-15 | 无锡曲速智能科技有限公司 | Special fan power assembly of sanitation car |
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2020
- 2020-01-02 CN CN202020020861.7U patent/CN211550085U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046199A (en) * | 2021-10-29 | 2022-02-15 | 无锡曲速智能科技有限公司 | Special fan power assembly of sanitation car |
| CN114046199B (en) * | 2021-10-29 | 2023-03-07 | 无锡曲速智能科技有限公司 | Special fan power assembly of sanitation car |
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