Adjustable axial flow nuclear-grade cooling tower fan

Abstract

The utility model relates to the field of air conditioning equipment, in particular to an adjustable axial flow nuclear-grade cooling tower fan. The utility model relates to an adjustable axial flow nuclear grade cooling tower fan which comprises a machine shell, a flow guide wheel is arranged on the machine shell, a motor is embedded in the flow guide wheel, the motor comprises an output shaft and an input shaft, the output shaft faces an air inlet section, an impeller is sleeved outside the output shaft, a pressurization adjustable heat dissipation wheel is arranged on one side of the motor, and the pressurization adjustable heat dissipation wheel is arranged on the other side of the motor. The impeller comprises a first hub, a plurality of inserting holes are evenly distributed outside the first hub, any inserting hole is provided with a blade in a matched mode through a fastening structure, each blade comprises an inserting disc, and a blade body is arranged on each inserting disc. A mounting surface is arranged in the jack, a plurality of mounting through holes are distributed in the outer edge of the plug disc, and an annular waist-shaped hole is formed in the mounting surface matched with any mounting through hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air conditioning equipment, air heat exchange, ventilation, the application technical field of air flow as shielding, especially a kind of adjustable axial nuclear level cooling tower fan. BACKGROUND

[0002] With the continuous improvement of people's environmental awareness, the construction of inland nuclear power plant is limited by water conditions, and warm water discharge of direct cooling scheme will have a significant impact on the ecological environment, so mechanical draft cooling tower is used in inland nuclear power plant construction to carry out twice circulation cooling for important auxiliary water system, to ensure the safe operation of nuclear power plant. Axial cooling tower fan is an important component in mechanical draft cooling tower, which requires functional safety level 1 and seismic SSE1, i.e. cooling fan must maintain the functions of "functional capacity" and "operability" after earthquake.

[0003] In the prior art, when axial cooling fan is needed to be applied in mechanical draft cooling tower scene, the safety and seismic resistance of traditional structure cannot meet the requirements of nuclear level facility use environment. SUMMARY

[0004] The utility model hopes to provide a kind of adjustable axial nuclear level cooling tower fan, specific scheme is as follows:

[0005] A kind of adjustable axial nuclear level cooling tower fan, including casing, the casing is equipped with flow guide wheel, the flow guide wheel is embedded with motor, the motor includes output shaft and input shaft, the output shaft is towards air inlet section, the output shaft is equipped with impeller, the one side of the motor is equipped with booster adjustable heat dissipation wheel, the impeller includes first hub, the first hub is uniformly distributed with a plurality of insertion holes, any the insertion hole is equipped with blade by fastening structure cooperation, the blade includes plug-in disc, the plug-in disc is equipped with blade body;The inner wall of the insertion hole is equipped with mounting surface, the outer edge of the plug-in disc is distributed with a plurality of installation through-holes, the mounting surface of any the installation through-hole is equipped with annular waist type hole.

[0006] The fastening structure includes locking ring on the mounting surface away from the plug-in disc side, the locking ring is equipped with mounting hole in cooperation with installation through-hole and annular waist type hole, bolt is sequentially penetrated through installation through-hole, annular waist type hole and mounting hole, locking nut is equipped in cooperation with the bolt.

[0007] The plug-in disc is equipped with pointer mark, the first hub outside the insertion hole is equipped with scale line correspondingly.

[0008] The central angle of the annular waist type hole is 22 °.

[0009] The annular waist type hole is 4, wherein the central axis of two annular waist type holes passes through the first hub central axis and is equally divided.

[0010] The height of the plug-in disc is greater than the depth of the socket.

[0011] The impeller is sleeved with a fairing.

[0012] The output end of the guide wheel is provided with a guide cover, the guide cover comprises a first cone, a second cone and a porous air inlet cover arranged in sequence, the central air inlet hole is provided at the center of the porous air inlet cover, and a plurality of edge air inlet holes are uniformly distributed on the porous air inlet cover.

[0013] The booster adjustable heat dissipation wheel is a concave-convex clamping structure, comprising a second hub, and 4N blade insertion holes are arranged on the second hub, wherein N is a positive integer.

[0014] The beneficial effects of the utility model lie in:

[0015] (1) effectively prevent the nut from falling off or loosening, cause the impeller to collide with the shell or be damaged, effectively improve the anti-vibration ability of the moving impeller, and avoid the occurrence of safety accidents;

[0016] (2) effectively improve the total pressure efficiency and high-efficiency working condition interval of the fan, and reduce vibration noise;

[0017] (3) meet the performance indicators under different working conditions, and improve the product use range. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a longitudinal sectional view structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility model;

[0019] Figure 2 It is Figure 1 a local enlarged structural schematic drawing of A;

[0020] Figure 3 It is a partial structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility model Figure 1 ;

[0021] Figure 4 It is a partial structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility model Figure 2 ;

[0022] Figure 5 It is a partial structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility model Figure 3 ;

[0023] Figure 6 It is a partial structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility model Figure 4 ;

[0024] Figure 7 It is a partial structural schematic drawing of the adjustable axial nuclear stage cooling tower fan of the utility modelFigure 5 ;

[0025] Figure 8 The utility model relates to a kind of adjustable axial nuclear stage cooling tower fan performance promotion curve analysis diagram of adjustable pressure adjustable heat dissipation wheel in fan;

[0026] Figure 9 The utility model relates to a kind of adjustable axial nuclear stage cooling tower fan's pneumatic flow field analysis diagram;

[0027] Wherein the reference numerals: 1. fairing;2. impeller;3. motor;4. guide wheel;5. casing;6. fairing;7. pressure adjustable heat dissipation wheel;8. first hub, 9. blade;10. locking ring;11. plug-in disc;12. jack;13. mounting through-hole;14. annular waist hole;15. scale line;16. mounting hole;17. second hub;18. blade jack;19. first cone cylinder;20. second cone cylinder;21. porous air inlet cover;22. blade body. DETAILED DESCRIPTION

[0028] The utility model will be described in further detail in connection with examples below, but the protection scope of the utility model is not limited to this.

[0029] The utility model relates to a kind of adjustable axial nuclear stage cooling tower fan, including casing 5, casing 5 is equipped with guide wheel 4, guide wheel 4 is inlaid with motor 3, the output shaft of motor 3 is towards the air inlet end and is set, the output shaft of motor 3 is equipped with impeller 2;The blade 9 of cooperation impeller 2 is equipped with fastening structure, the air outlet end of cooperation motor 3 is equipped with pressure adjustable heat dissipation wheel 7;Cooperation motor 3 is equipped with control unit, for controlling fan speed.

[0030] In the utility model, casing 5 is the cylinder structure of two ends opening, generally, guide wheel 4, motor 3, impeller 2, pressure adjustable heat dissipation wheel 7 are coaxially arranged with casing 5.

[0031] In the utility model, after motor 3 is electrified and rotates, the impeller 2 of cooperation at its output shaft is rotated and works, gas enters the passage between the blade 9 of impeller 2 in casing 5, through the interaction of impeller 2 and gas, gas obtains energy, forms airflow, airflow transmission flow direction guide wheel 4 and exports to air outlet end;Because part of airflow will form vortex at the tail end of fairing 6, so through the rotation of pressure adjustable heat dissipation wheel 7, airflow will flow to motor 3 through air hole, motor heat is discharged from the gap between hub and guide wheel 4 along with airflow, flows to guide wheel 4, through internal circulation dredging, fan outlet tail vortex is significantly improved, fan pneumatic efficiency and motor heat dissipation effect are greatly improved, fan safety is guaranteed.

[0032] The impeller 2 comprises a first hub 8, a plurality of insertion holes 12 are uniformly distributed outside the first hub 8, and any insertion hole 12 is matched with a blade 9 through a fastening structure; any blade 9 matched with the insertion hole 12 comprises an insertion disc 11, the insertion disc 11 is provided with a blade body 22; an installation surface is arranged on the inner wall of the insertion hole 12, a plurality of installation through holes 13 are distributed on the outer edge of the insertion disc 11, and an annular waist hole 14 is arranged on the installation surface matched with any installation through hole 13.

[0033] In the utility model, the blade 9 and the hub adopt an insertion type installation mode, specifically, the blade 9 comprises a blade body 22 and an insertion disc 11, and the installation is completed through the insertion of the insertion disc 11 into the insertion hole 12; in the implementation process, generally, four installation through holes 13 are arranged on the installation circular surface of the insertion disc 11, and four annular waist holes 14 corresponding to the installation through holes 13 are uniformly arranged on the installation surface in the insertion hole 12.

[0034] The fastening structure comprises a locking ring 10 arranged on the installation surface in the hub, the locking ring 10 is provided with an installation hole 16 matched with the installation through hole 13 and the annular waist hole 14, a bolt is sequentially penetrated through the installation through hole 13, the annular waist hole 14 and the installation hole 16, and a locking nut is matched with the bolt; a groove part is respectively arranged on the inner ring and the outer ring of the locking ring 10 on the two sides of any installation hole 16, and the distance between the groove bottoms of the corresponding two groove parts is greater than 0.

[0035] In the utility model, further, in the installation process, the blade 9 and the first hub 8 adopt bolt connection, the bolt sequentially penetrates through the insertion disc 11 and the first hub 8, then a locking ring 10 is arranged, finally a lock nut is installed, and the locking ring 10 is tightly attached to the inner wall of the first hub 8.

[0036] Specifically, the thickness of the locking ring 10 is 1-2 mm, four installation holes 16 are uniformly arranged on the ring surface of the locking ring 10, the diameter of the installation hole 16 is 2 mm larger than that of the bolt, the inner ring and the outer ring of the locking ring 10 on the two sides of any installation hole 16 are respectively provided with groove parts, so that the outer side of the installation hole 16 is a rectangle or a square, the rectangle or the square here is 2-3 mm larger than the outer diameter of the nut, and the two adjacent rectangles or squares are connected by a ring segment.

[0037] In the installation process, after the locking nut is installed in place, the locking nut is fastened again by using a torque wrench, when the torque of the locking nut reaches the specified requirement, at this time, the four corners of the rectangle or the square of the locking ring 10 are folded upwards and clamped on the locking nut; the four locking nuts are clamped by using the locking ring 10 in sequence, and when the locking ring 10 is folded flat during disassembly, the locking nut can be disassembled. The use of the locking ring 10 can ensure that the blade 9 and the first hub 8 are firmly installed, the bolt will not be loosened due to vibration and other factors, and the stability and safety of the fan operation are ensured.

[0038] In the utility model, the locking ring 10 is cut and discharged by using a laser cutting machine.

[0039] The first hub 8 outside the jack 12 is provided with a scale line 15 corresponding to the pointer mark of the plug-in disc 11.

[0040] The central angle of the annular waist-shaped hole 14 is 22°.

[0041] In the implementation of the utility model, the mounting through hole 13 and the annular waist-shaped hole 14 are both four (the petiole of the blade is designed as a circular convex handle, the circular convex handle blade is provided with a pointer line, the petiole mounting surface is provided with four mounting through holes 13, and the first hub 8 is uniformly provided with a circular recess hole corresponding to the circular convex handle of the petiole), and the central angle of the annular waist-shaped hole 14 is 22°.

[0042] The height of the plug-in disc 11 is greater than the depth of the jack 12.

[0043] The booster adjustable heat dissipation wheel 7 is a concave-convex clamping structure, which comprises a second hub 17, and the second hub 17 is provided with 4N blade jacks 18, and N is a positive integer.

[0044] Considering that the environmental temperature of the nuclear power plant is between-35℃ and 45℃, the fan needs to be safely operated under different working conditions, and through the angle adjustment design of the blade 9 of the booster adjustable heat dissipation wheel 7, the requirements of the motor 3 ventilation and heat dissipation are effectively met, and the fan total pressure efficiency is improved by 1% to 3%.

[0045] The impeller 2 is provided with a fairing 1; the output end of the guide wheel 4 is provided with a guide cover 6, the guide cover 6 comprises a first cone 19, a second cone 20 and a multi-hole air inlet cover 21 which are sequentially arranged, the central axis of the multi-hole air inlet cover 21 is provided with a central air inlet hole, and a plurality of edge air inlet holes are uniformly distributed on the multi-hole air inlet cover with the central air inlet hole as the center.

[0046] In the utility model, the front end of the impeller 2 is installed with the fairing 1, the end of the flow guide wheel 4, namely the air outlet end is installed with the fairing 6 for improving vortex, the end of the fairing 6 protrudes outside the barrel of the casing 5, the airflow is inhaled from the air duct inlet and is rectified through the fairing 1, and the output end of the fairing 6 is provided with air holes, the fan dynamic pressure recovery here has reached the maximum, the air pressure difference formed from here and the opening of the front section of the flow guide wheel 4 is maximum, microcirculation ventilation flow can be formed, the auxiliary motor 3 tail booster adjustable heat dissipation can work heat dissipation, and the motor heat dissipation effect can be greatly improved.

[0047] In the utility model, the fairing 6 greatly improves the fan aerodynamic efficiency and prevents hot gas leakage from affecting the flow field.

[0048] In the utility model, the motor 3 is variable frequency type, can cooperate corresponding control cabinet and program to control and adjust the rotating speed of the fan, and the setting of the control cabinet and program is the content that the person skilled in the art can easily understand.

[0049] The above is only the preferred embodiment of the utility model and is not used for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiment, for the person skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment or make equivalent replacement to part technical features. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. An adjustable axial flow nuclear service cooling tower fan characterized by: The utility model provides a kind of air conditioner, including shell, the shell is equipped with guide wheel, the guide wheel is embedded with motor, the motor includes output shaft and input shaft, the output shaft is towards air inlet section, the output shaft is equipped with impeller, the side of the motor is equipped with adjustable heat dissipation wheel of supercharging, the impeller includes first hub, the first hub is equipped with several insertion holes outside evenly, any the insertion hole is equipped with blade by fastening structure cooperation, the blade includes insertion disc, and the insertion disc is equipped with blade body on;The bottom of the insertion hole is equipped with mounting surface, the outer edge of the insertion disc is distributed with several installation through-hole, and the mounting surface of cooperation any the installation through-hole is equipped with annular waist type hole.

2. An adjustable axial nuclear cooling tower fan as claimed in claim 1, characterized in that: The fastening structure includes locking ring on the mounting surface one side away from insertion disc, the locking ring is equipped with mounting hole on cooperation installation through-hole and annular waist type hole, bolt is sequentially penetrated installation through-hole, annular waist type hole and mounting hole, and locking nut is equipped with cooperation the bolt.

3. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The insertion disc is equipped with pointer mark, and the first hub outside the insertion hole is equipped with scale line correspondingly.

4. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The central angle of the annular waist type hole is 22 °.

5. An adjustable axial nuclear cooling tower fan as claimed in claim 4, wherein: The annular waist type hole is 4, and the central axis of two annular waist type holes passes through the first hub center axis and is divided equally.

6. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The insertion disc height is greater than insertion hole depth.

7. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The impeller is equipped with fairing.

8. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The output end of the guide wheel is equipped with guide cover, and the guide cover includes first cone, second cone and multi-hole air inlet cover sequentially arranged, the central air inlet hole is arranged at the axis of the multi-hole air inlet cover, and a plurality of edge air inlet holes are evenly distributed on the multi-hole air inlet cover with the central air inlet hole as the center.

9. An adjustable axial nuclear cooling tower fan as claimed in claim 1, wherein: The adjustable heat dissipation wheel of supercharging is concave-convex clamping structure, including second hub, the second hub is equipped with 4N blade insertion holes, and N is positive integer.

Images