Maintainable marine axial flow fan

Abstract

The utility model provides a maintainable marine axial flow fan which comprises a machine shell, a motor is arranged in the machine shell, a driving shaft of the motor is connected with an impeller, and at least one set of blades are installed on the impeller. A buffering seat is fixedly installed on the inner wall of the machine shell through fastening bolts, a buffering pad is arranged on the end face, close to the motor, of the buffering seat, threaded holes are formed in the buffering pad and the buffering seat correspondingly, and threaded rods matched with the threaded holes for spiral transmission are arranged in the threaded holes; the other end of the screw rod is fixed through a locking nut; and the screw rod extends out of a threaded hole formed in the buffer pad and extends into the machine shell, and a shock absorber is fixedly mounted on the screw rod. According to the utility model, the structure is simple, the maintenance is convenient, and the damping assembly composed of the buffer pad, the abutting block, the spring seat, the damping spring and the damper is additionally arranged, so that the vibration generated during the operation of the motor is taken away, and the motor can operate stably and has low vibration and noise during the operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of marine axial flow fans, and specifically relates to a maintainable marine axial flow fan. Background Technology

[0002] With the increasing demand for ventilation in industrial production and various venues, axial flow fans are widely used as an important ventilation device. Marine open-type axial flow fans are ventilation devices specifically designed for ships, mainly used for air circulation and ventilation inside the vessel.

[0003] Traditional axial flow fans have complex structures, are difficult to maintain, and produce significant noise and vibration in practical applications.

[0004] Therefore, how to solve the defects in the above-mentioned technical solutions has become one of the urgent problems to be solved in the field of marine axial flow fan technology. Utility Model Content

[0005] In view of the problems existing in the background art, the present invention provides a maintainable marine axial flow fan, including a housing, and a motor is installed inside the housing. The drive shaft of the motor is connected to an impeller, and at least one set of blades is installed on the impeller. A buffer seat is fixedly installed on the inner wall of the housing by fastening bolts. A buffer pad is provided on the end face of the buffer seat near the motor position. Threaded holes are opened in both the buffer pad and the buffer seat. A screw is installed in the threaded hole for helical transmission, and the other end of the screw is fixed by a lock nut. The screw extends out of the threaded hole on the buffer pad and into the housing, and a shock absorber is fixedly installed thereon. A shock absorber spring is installed on the shock absorber. A retaining block is installed on the spring seat of the shock absorber spring away from the end face of the shock absorber. A retaining groove is provided on the motor base for the retaining block to extend into, and the outer wall of the retaining block is tightly fitted with the inner wall of the retaining groove.

[0006] Optionally, the cushioning pad is made of an elastic cushioning material.

[0007] Optionally, the motor wiring port is connected to a cable, and a motor outlet pipe is provided on the outside of the cable. The motor outlet pipe is detachably connected to the motor housing. The cable located in the motor outlet pipe passes through the housing and is electrically connected to the junction box.

[0008] Optionally, the oil inlet and oil outlet of the motor are respectively connected to oil pipes, and the oil pipes away from the oil inlets extend out of the housing and are connected to the oil nozzle assembly. The oil nozzle assembly includes an oil nozzle, which is located outside the housing.

[0009] Optionally, the nozzle assembly further includes an oil seat. The nozzle is fixedly connected to the outer wall of the housing by means of fastening screws or the like. The oil seat has a positioning hole for the nozzle to extend into, and the nozzle is installed on the nozzle by a locking member. The other end of the nozzle extends into the housing and is connected to the oil pipe.

[0010] Optionally, the blade further includes a mounting end, and the mounting end can be fixedly connected to the impeller by welding or fastening screws;

[0011] The blade also includes a windward surface, which is inclined to the mounting end with a maximum inclination angle of 15°, and the inclined end extends toward the side away from the mounting end, and is bent inward on the inner side of the blade to form an arc-shaped end.

[0012] Optionally, at least one set of recesses is provided on the outer surface of the arc-shaped end, and the depth of the recesses is 0.23 mm.

[0013] In summary, the beneficial effects of this utility model are:

[0014] (1) This utility model has a simple structure and is easy to maintain. By adding a shock-absorbing component consisting of a buffer pad, a clamping block, a spring seat, a shock-absorbing spring and a shock absorber, the vibration generated during the operation of the motor can be removed, so that it can run smoothly with low vibration and noise.

[0015] (2) This utility model provides at least one set of pits on the outer surface of the arc end, and the depth of the pits is 0.23mm. When the depth of the pits is 0.23mm, they can absorb airflow, break up the swirling flow generated on the outer side of the arc end of the blade, reduce the swirling flow, and thus reduce aerodynamic noise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a maintainable marine axial flow fan according to the present invention;

[0017] Figure 2 This is a schematic diagram of another orientation of an embodiment of a maintainable marine axial flow fan according to the present invention;

[0018] Figure 3 This is a schematic diagram of the oil nozzle assembly structure of an embodiment of a maintainable marine axial flow fan according to this utility model;

[0019] Figure 4 This is an enlarged view of the structure at position A in an embodiment of a maintainable marine axial flow fan according to this utility model;

[0020] Figure 5This is an assembly drawing of the blades and impeller of an embodiment of a maintainable marine axial flow fan according to the present invention;

[0021] Figure 6 This is a schematic diagram of the blade structure of an embodiment of a maintainable marine axial flow fan according to the present invention;

[0022] Figure 7 This is a schematic diagram of the blade structure of another embodiment of a maintainable marine axial flow fan according to the present invention.

[0023] Figure label:

[0024] 1. Axial flow fan; 2. Impeller shaft; 3. Casing; 4. Impeller; 5. Blade; 051. Mounting end; 052. Windward side; 053. Arc-shaped end; 054. Recess; 6. Junction box; 7. Motor outlet pipe; 8. Oil nozzle assembly; 801. Oil nozzle; 802. Locking element; 803. Oil seat; 9. Oil pipe; 10. Motor; 11. Fastening bolt; 12. Buffer seat; 131. Buffer pad; 132. Anti-locking block; 133. Spring seat; 134. Shock-absorbing spring; 135. Shock absorber; 136. Screw; 137. Fastening nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to facilitate a more thorough understanding of the present utility model and to fully convey the concept of the present utility model to those skilled in the art.

[0026] In the description of this specification, the references to terms such as "certain embodiments," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1

[0029] like Figure 1-7 As shown, this embodiment provides a maintainable marine axial flow fan 1, including a housing 3, and a motor 10 is installed inside the housing 3. The drive shaft of the motor 10 is connected to an impeller, and at least one set of blades 5 are installed on the impeller 4. A buffer seat 12 is fixedly installed on the inner wall of the housing 3 by fastening bolts 11. A buffer pad 131 is provided on the end face of the buffer seat 12 near the motor 10. Both the buffer pad 131 and the buffer seat 12 have threaded holes. A screw 136 is installed in the threaded hole for helical transmission. The other end of 36 is fixed by a lock nut; the screw 136 extends out of the threaded hole provided on the buffer pad 131 and extends into the housing 3, and a shock absorber 135 is fixedly installed thereon. The shock absorber 135 can be a damping shock absorber. A shock absorber spring 134 is installed on the shock absorber 135, and a retaining block 123 is installed on the spring seat 133 of the shock absorber spring 134 away from the end face of the shock absorber 135. The motor base of the motor 10 is provided with a retaining groove into which the retaining block 123 extends, and the outer wall of the retaining block 123 is tightly fitted with the inner wall of the retaining groove.

[0030] The cushioning pad is made of elastic cushioning material.

[0031] Furthermore, the housing 3 is made of a high-strength and high-rigidity material, such as alloy steel. By using a housing made of a high-strength and high-rigidity material, it is able to withstand the pressure and vibration during the operation of the axial flow fan.

[0032] In this embodiment, during use, rotating the screw 136 causes the screw 136 to drive the low-tightening block set on the shock absorber to extend into the low-tightening groove, so that the abutting block can fit tightly with the abutting groove.

[0033] In this embodiment, by adding a shock-absorbing assembly composed of a buffer pad, a retaining block, a spring seat, a shock-absorbing spring, and a shock absorber, the vibration generated by the motor 10 during operation is removed, so that it can run smoothly with low vibration and noise.

[0034] Furthermore, the wiring port of the motor 10 is connected to a cable, and a motor outlet pipe 7 is provided on the outside of the cable. The motor outlet pipe 7 is detachably connected to the housing of the motor 10. The cable located in the motor outlet pipe 7 passes through the housing 10 and is electrically connected to the junction box 6.

[0035] Existing axial flow fans typically operate in harsh environments, such as high temperature, high corrosion, and high dust levels. This can lead to blockage of the motor lubrication ports, resulting in damage to the oil circuit system. Furthermore, the existing oil circuit system is located inside the open-type axial flow fan, making replacement difficult when damaged, resulting in high maintenance costs and time-consuming processes. To address these technical shortcomings, please refer to [link to relevant documentation]. Figure 1-7 As shown, the oil inlet and oil outlet of the motor 10 are respectively connected to the oil pipe 9, and the oil pipe 9, which is away from the oil port (oil inlet or oil outlet), extends out of the housing 10 and is connected to the oil nozzle assembly 8. The oil nozzle assembly 8 includes an oil nozzle 801, which is located outside the housing 10.

[0036] This utility model has a simple overall structure, making it easy to maintain and replace the oil nozzle. It can also reduce the probability of motor failure in open-type axial flow fans and extend the service life of the equipment.

[0037] Furthermore, the nozzle assembly 8 also includes an oil seat 803. The nozzle 801 is fixedly connected to the outer wall of the housing 10 by fastening screws or the like. The oil seat 803 has a positioning hole for the nozzle 801 to extend into, and the nozzle 801 is installed on the nozzle 801 by a locking member 802. The other end of the nozzle 801 extends into the housing 10 and is connected to the oil pipe 9.

[0038] In this embodiment, if the nozzle becomes clogged or damaged, it is only necessary to remove the nozzle 801 and replace the damaged nozzle 801.

[0039] Furthermore, the blade 5 also includes a mounting end 051, and the mounting end 051 can be fixedly connected to the impeller by welding or fastening screws, etc.

[0040] The blade 5 also includes a windward surface 052, which is inclined between the windward surface 052 and the mounting end 051, with a maximum inclination angle of 15°, preferably 8°, and the inclined end extends toward the side away from the mounting end 051, and is bent inward on the inner side of the blade 5 to form an arc-shaped end 053.

[0041] In this embodiment, when the tilt angle between the windward surface and the mounting end is 8°, the tilt setting helps to reduce aerodynamic drag, and the setting of the arc end 053 helps to disperse the aerodynamic force acting on the blade, and the tilt end helps to reduce the vortex and noise at the blade tip.

[0042] Example 2

[0043] Further improvements based on Example 1; please refer to... Figure 7 As shown, at least one set of recesses 054 are provided on the outer surface of the arc-shaped end 053, and the depth of the recesses 054 is 0.23mm.

[0044] In this embodiment, when the depth of the pit is 0.23 mm, it can absorb airflow, break up the swirling flow generated on the outer side of the blade's arc-shaped end, reduce the swirling flow, and thus reduce aerodynamic noise.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not restrictive. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A maintainable marine axial flow fan characterised in that, The application relates to a marine axial flow fan, which comprises a casing, a motor arranged in the casing, a driving shaft of the motor connected with an impeller, and at least one set of blades arranged on the impeller; a buffer seat is fixedly arranged on the inner wall of the casing through fastening bolts, a buffer pad is arranged on the end face of the buffer seat close to the motor, threaded holes are formed in the buffer pad and the buffer seat, a screw rod is arranged in the threaded holes and used for spiral transmission, the other end of the screw rod is fixed through a locking nut, the screw rod is arranged in the threaded hole of the buffer pad and extends into the casing, a shock absorber is fixedly arranged, a shock absorbing spring is arranged on the shock absorber, a pressing block is arranged on the spring seat of the shock absorbing spring away from the end face of the shock absorber, a pressing groove is arranged on the motor base of the motor for the pressing block to extend into, and the outer wall of the pressing block is tightly combined with the inner wall of the pressing groove.

2. The marine axial flow fan according to claim 1, wherein the buffer pad is made of elastic buffer material.

3. The marine axial flow fan according to claim 1, wherein the motor wiring port is communicated with a cable, a motor outlet pipe is arranged outside the cable, the motor outlet pipe and the motor shell are detachably connected, the cable in the motor outlet pipe passes through the casing and is electrically connected with a junction box.

4. The marine axial flow fan according to claim 3, wherein the oil inlet and the oil outlet of the motor are respectively communicated with oil pipes, the oil pipes away from the oil inlets extend out of the casing and are communicated with oil nozzle assemblies, the oil nozzle assemblies comprise oil nozzles, and the oil nozzles are arranged outside the casing.

5. The marine axial flow fan according to claim 4, wherein the oil nozzle assembly further comprises an oil seat, the oil nozzle is arranged on the outer wall of the casing through fastening screws, the oil seat is provided with a positioning hole for the oil nozzle to extend into, and the oil nozzle is arranged on the oil nozzle through a locking member, the other end of the oil nozzle extends into the casing and is communicated with the oil pipe.

6. The marine axial flow fan according to claim 1, wherein the blade further comprises an installation end, and the installation end is welded on the impeller; the blade further comprises a windward face, the windward face is arranged to be inclined between the installation end, the maximum inclination angle is 15 DEG, and the inclined end extends to the side away from the installation end, and an arc-shaped end is formed by inwardly bending on the inner side of the blade.

7. The marine axial flow fan according to claim 6, wherein at least one set of concaves are arranged on the outer side of the arc-shaped end, and the depth of the concaves is 0.23 mm. ​ ​ ​ ​ ​ ​

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