CN217950736U - Large-hub-ratio intermediate-frequency axial flow fan for ship - Google Patents
Large-hub-ratio intermediate-frequency axial flow fan for ship Download PDFInfo
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- CN217950736U CN217950736U CN202222219656.5U CN202222219656U CN217950736U CN 217950736 U CN217950736 U CN 217950736U CN 202222219656 U CN202222219656 U CN 202222219656U CN 217950736 U CN217950736 U CN 217950736U
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- impeller
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- intermediate frequency
- guide vane
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Abstract
The utility model provides a naval vessel is with big wheel hub ratio intermediate frequency axial fan mainly comprises barrel, preceding kuppe, impeller, stator, intermediate frequency motor, back kuppe, screw and lock nut. The impeller is directly connected with the intermediate frequency motor, the hub ratio of the impeller is 0.81, the frequency of the intermediate frequency motor is 400Hz, the number of the blades of the guide vane is larger than that of the blades of the impeller and is prime, the chord length of the blades of the guide vane is smaller than that of the blades of the impeller, and the blades of the impeller and the guide vane are NACA65 family wings. The utility model discloses can provide and be equipped with the medium-frequency electric system on small-size naval vessel, its ventilation system axial fan structure is slim and graceful, excellent performance, and amount of wind and wind pressure are all great, satisfy ventilation's operation requirement well.
Description
Technical Field
The utility model relates to a big wheel hub is than intermediate frequency axial-flow fan belongs to naval vessel ventilation system technical field.
Background
The axial flow fan is an important component of a ship ventilation system and mainly used for extracting outside air and ventilating a cabin. Generally, a mechanical ventilation system in a ship ventilation system is composed of an axial flow fan, a ventilation duct and an air distributor, wherein the axial flow fan needs to provide large-flow air for ventilation and air change, and simultaneously needs to provide certain air pressure to overcome air resistance of the ventilation duct and the air distributor.
Along with the development of ship equipment, higher requirements are put on the air volume and the air pressure of an axial flow fan, in the field of conventional ships, the axial flow fan is made of a three-phase 50Hz low-frequency electric system, the rotating speed of the axial flow fan is generally 1400-1500 r/min or 2800-3000 r/min, the air pressure capable of being provided at the rotating speed is small, the size of an impeller is large, a hub is small, and the axial flow fan is heavy in structure and low in performance.
Disclosure of Invention
The utility model aims at providing a naval vessel is with big wheel hub than intermediate frequency axial fan, compact structure, light in weight, amount of wind pressure are big, satisfy the ventilation demand that increases day by day on the naval vessel.
The utility model discloses a realize through following technical scheme:
a large hub ratio intermediate frequency axial flow fan for ships comprises;
a barrel comprising an inlet end and an outlet end;
the medium-frequency motor is arranged in the cylinder body, and the frequency of the medium-frequency motor is 400Hz;
the impeller is arranged in the cylinder and positioned on one side of the air inlet end of the cylinder, the impeller is directly connected with an output shaft of the intermediate frequency motor, and the hub ratio of the impeller is 0.81;
the guide vane is arranged in the cylinder and positioned on one side of the air outlet end of the impeller, a spacing distance is arranged between the guide vane and the impeller along the axial direction of an output shaft of the intermediate frequency motor, the number of blades of the guide vane is greater than that of blades of the impeller and is prime to each other, the chord length of the blades of the guide vane is smaller than that of the blades of the impeller, at least three first thickened blades with the thickness greater than that of other blades are arranged in the blades of the guide vane, and the end face of the tail end of each first thickened blade is provided with a threaded hole;
the front air guide sleeve is arranged at the air inlet end of the impeller and is integrally assembled with the impeller;
the rear air guide sleeve is arranged on one side of the intermediate-frequency motor close to the air outlet end of the cylinder body and is integrally assembled with the intermediate-frequency motor;
and the screw penetrates through the cylinder body and is connected with a threaded hole in the end face of the tail end of the first thickened blade in the guide vane.
Furthermore, flange structures are arranged on two end faces of the cylinder body corresponding to the air inlet end and the air outlet end.
Further, the number of the blades of the impeller is 21, the outer diameter of the impeller is 281mm, the diameter of a hub is 228mm, the blade section of the impeller is an NACA 65-family blade, the chord length of the blade top is 55.9mm, the installation angle at the blade top is 67 degrees and 1 degree, the chord length at the blade root is 61.1mm, and the installation angle at the blade root is 58 degrees.
Further, the number of the blades of the guide vane is 26, the blade section of the guide vane is an NACA65 family wing, the guide vane is not twisted, and the chord length is 42.1mm.
Further, naval vessel is with big wheel hub still includes that thickness is greater than the second thickening blade of other stator blades, second thickening blade sets up on the stator, and designs in groups with first thickening blade, including a first thickening blade and a second thickening blade in every group, and the line of first thickening blade and second thickening blade is on a parallel with the output shaft axial of intermediate frequency motor.
Furthermore, the front air guide sleeve is streamline and accords with G5.6-level dynamic balance precision after being integrally assembled with the impeller, and the rear air guide sleeve is hemispherical.
Further, the radial clearance between the impeller and the cylinder is 0.5-1 mm, and the axial spacing distance between the impeller and the guide vane along the output shaft is 2-3 mm.
The utility model discloses an axial fan mainly designs the calculation according to the rotational speed when the design, under three-phase 400Hz medium frequency electric system, can promote the rotational speed to limit 24000r/min, can make it show the promotion than the rotational speed, is favorable to axial fan's aerodynamic design. Meanwhile, the hub ratio of the impeller and the chord length of the blades are increased, and larger air pressure can be provided on the premise that the air quantity of the axial flow fan is larger. The medium-frequency electric system can be provided and equipped on a small ship, the axial flow fan of the ventilation system is light in structure, excellent in performance and large in air quantity and air pressure, and the use requirements of ventilation and air exchange are well met.
Drawings
FIG. 1 is a schematic structural view of a large hub ratio intermediate frequency axial flow fan for a ship;
FIGS. 2 and 3 are views showing the structure of an impeller;
FIG. 4 is a vane structure view;
FIG. 5 is a left side view of FIG. 4;
in the figure: 1-cylinder, 2-front flow guide cover, 3-impeller, 4-guide vane, 5-intermediate frequency motor, 6-rear flow guide cover, 7-screw and 8-locking nut.
Detailed Description
The following description of the present invention will be made with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations according to the common technical knowledge and conventional means in the field are included in the scope of the present invention without departing from the technical spirit of the present invention.
In this embodiment, as shown in fig. 1 to 5, the large hub ratio intermediate frequency axial flow fan for a ship mainly comprises a cylinder 1, a front air guide sleeve 2, an impeller 3, a guide vane 4, an intermediate frequency motor 5, a rear air guide sleeve 6, a screw 7 and a lock nut 8.
The overall structure of the medium-frequency axial flow fan is axial flow, air is axially fed and axially discharged, and the arrow direction in fig. 1 represents the air flow feeding direction. The two ends of the cylinder body 1 are flange structures, so that the cylinder body is convenient to be connected with a ventilating duct. The air intake direction end has an impeller 3, and the impeller 3 as a moving blade adopts a pure axial flow type structure. The end of giving vent to anger has stator 4, and the impeller 3 of inlet end is installed on intermediate frequency motor 5, and the connection form is the direct connection, adopts lock nut 8 to connect on intermediate frequency motor 5's output shaft, and no mechanical power loss, drive efficiency is high, overall structure is compact. When the impeller is installed, the distance-adjusting gasket can be arranged at the joint of the impeller 3 and the guide vane 4 as required so as to ensure that the axial distance between the impeller 3 and the guide vane 4 is 2-3 mm. The radial clearance between the impeller 3 and the cylinder 1 is uniformly 0.5-1 mm along the circumference by adjusting the screws 7 in a plurality of threaded holes on the end surfaces of the cylinder 1 and the guide vane 4.
The streamline-shaped front fairing 2 and the impeller 3 are integrally installed (namely the two are assembled firstly and then integrally installed on the output shaft of the intermediate-frequency motor 5), the front fairing 2 and the impeller 3 are integrally subjected to dynamic balance correction and are controlled according to the dynamic balance precision G5.6, and the reliability and the safety are high. The front air guide sleeve 2 is arranged to further rectify and guide the air flow entering the impeller 3, so that the air flow can uniformly enter the impeller 3, the air inlet loss is reduced, and the pneumatic performance of the axial flow fan is improved.
The hemispherical rear air guide sleeve 6 and the intermediate frequency motor 5 are integrally installed, so that the air flow pressurized by the impeller 3 and the guide vane 4 can be further rectified, the air outlet loss is reduced, and the pneumatic performance of the axial flow fan is improved.
As shown in FIG. 2 and FIG. 3, the impeller 3 is composed of 21 blades, is made of high-strength forged aluminum alloy LD5 material, and is characterized in that the outer diameter of the impeller 3 is 281mm, the hub diameter is 228mm, and the hub ratio is 0.81, which belongs to the category of large hub ratio. The blade section is an NACA 65-family blade, the chord length at the blade top is 55.9mm, the installation angle at the blade top is 67 degrees 1', the chord length at the blade root is 61.1mm, and the installation angle at the blade root is 58 degrees, thereby belonging to the category of large chord length and large torsion angle. The impeller 3 has good pneumatic design and can provide larger air volume and air pressure.
As shown in fig. 4 and 5, the guide vane 4 is composed of 26 blades, the number of the blades is greater than that of the impeller 3, and the number of the blades of the guide vane 4 and that of the impeller 3 are prime numbers with each other, so that good aerodynamic performance can be obtained. The guide vane 4 is made of a high-strength aluminum alloy 6061 material. As shown in fig. 4 and 5, 3 blades are thickened in the circle of blades on the left side of fig. 4, and a threaded hole is designed on the end face of the tail end, so as to facilitate the tight installation and adjustment of the impeller 3 and the radial clearance between the guide vane 4 and the inner wall of the cylinder 1, and 3 thickened blades are additionally designed on the outlet end, as shown in fig. 1 and 4, wherein the 3 thickened blades and the 3 thickened blades are in two-to-two group, so that the installation and adjustment structure matched with the screw 7 in fig. 1 is formed. The blade section of the guide vane 4 is an NACA 65-family wing, is not twisted (straight blade), has a chord length of 42.1mm which is smaller than that of the impeller 3, and aims to fully utilize the airflow supercharging effect of the rotating blade to improve the wind pressure.
The above-mentioned embodiment is not used for limiting the protection scope of the utility model discloses a all be in the utility model discloses a deformation, modification or equivalence replacement etc. that make on the technical scheme basis all should fall into the protection scope of the utility model.
Claims (7)
1. The utility model provides a naval vessel is with big wheel hub than intermediate frequency axial fan which characterized in that: comprises the following steps of;
the cylinder body (1), the cylinder body (1) comprises an air inlet end and an air outlet end;
the medium-frequency motor (5), the medium-frequency motor (5) is arranged in the cylinder body (1), and the frequency of the medium-frequency motor (5) is 400Hz;
the impeller (3) is arranged in the cylinder body (1) and is positioned on one side of the air inlet end of the cylinder body (1), the impeller (3) is directly connected with the output shaft of the intermediate frequency motor (5), and the hub ratio of the impeller (3) is 0.81;
the guide vane (4) is arranged in the cylinder body (1) and located on one side of an air outlet end of the impeller (3), a spacing distance is arranged between the guide vane (4) and the impeller (3) along the axial direction of an output shaft of the intermediate frequency motor (5), the number of blades of the guide vane (4) is larger than that of the blades of the impeller (3) and is prime to each other, the chord length of the blades of the guide vane (4) is smaller than that of the blades of the impeller (3), at least three first thickening blades with thicknesses larger than other blades are arranged in the blades of the guide vane (4), and a threaded hole is formed in the end face of the tail end of each first thickening blade;
the front air deflector (2) is arranged at the air inlet end of the impeller (3), and is integrally assembled with the impeller (3);
the rear air guide sleeve (6) is arranged on one side, close to the air outlet end of the cylinder body (1), of the intermediate-frequency motor (5), and is integrally assembled with the intermediate-frequency motor (5);
the screw (7), screw (7) pass barrel (1) and be connected with the screw hole of first thickening blade terminal surface in stator vane (4).
2. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: and flange structures are arranged on two end faces of the cylinder body (1) corresponding to the air inlet end and the air outlet end.
3. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: the impeller (3) is characterized in that the number of blades is 21, the outer diameter of the impeller (3) is 281mm, the diameter of a hub is 228mm, the blade section of the impeller (3) is an NACA 65-family blade, the chord length of the blade top is 55.9mm, the installation angle at the blade top is 67 degrees and 1 degree, the chord length at the blade root is 61.1mm, and the installation angle at the blade root is 58 degrees.
4. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: the number of the blades of the guide vane (4) is 26, the blade section of the guide vane (4) is an NACA65 group wing, the guide vane is not twisted, and the chord length is 42.1mm.
5. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: still include the second thickening blade that thickness is greater than other stator (4) blades, second thickening blade sets up on stator (4), and designs in groups with first thickening blade, and including a first thickening blade and a second thickening blade in every group, the line of first thickening blade and second thickening blade is on a parallel with the output shaft axial of intermediate frequency motor (5).
6. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: the front air guide sleeve (2) is streamline-shaped and conforms to G5.6-level dynamic balance precision after being integrally assembled with the impeller (3), and the rear air guide sleeve (6) is hemispherical.
7. The large hub ratio intermediate frequency axial flow fan for ships and warships of claim 1, characterized in that: the radial clearance between the impeller (3) and the cylinder (1) is 0.5-1 mm, and the interval distance between the impeller (3) and the guide vane (4) along the axial direction of the output shaft is 2-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222219656.5U CN217950736U (en) | 2022-08-23 | 2022-08-23 | Large-hub-ratio intermediate-frequency axial flow fan for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222219656.5U CN217950736U (en) | 2022-08-23 | 2022-08-23 | Large-hub-ratio intermediate-frequency axial flow fan for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217950736U true CN217950736U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222219656.5U Active CN217950736U (en) | 2022-08-23 | 2022-08-23 | Large-hub-ratio intermediate-frequency axial flow fan for ship |
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| Country | Link |
|---|---|
| CN (1) | CN217950736U (en) |
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2022
- 2022-08-23 CN CN202222219656.5U patent/CN217950736U/en active Active
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