Fan shell with good stability

Abstract

The utility model discloses a fan casing with good stability, which comprises a casing, an impeller is arranged in the casing, an impeller hub is arranged on the right side of the impeller, a main shaft is arranged on the front side of the casing, one end of the main shaft penetrates into the impeller, and an anti-corrosion nut cover is arranged on the left side of the impeller hub. Frame type steel frames are fixedly installed on the front face and the back face of the machine shell, triangular supports are fixedly installed on the two sides of the two frame type steel frames, two metal inclined struts are further arranged on the front face and the back face of the machine shell, and criss-cross reinforcing rib plates are welded to the front face and the back face of the machine shell. According to the draught fan shell with the good stability, the rigidity of the shell is enhanced through the reinforcing rib plates and the triangular supports, vibration of the shell back plate is avoided, a draught fan operates stably, meanwhile, the main shaft is protected against direct contact with gas through the anti-corrosion nut cover, and the service life of the impeller and the service life of the main shaft are prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan shell technical field especially relates to a fan shell with good stability. BACKGROUND

[0002] High pressure fan refers to the wind pressure under the design condition is 30kPa~200KPa or compression ratio e=1.3~3 fan. The current industry is generally classified as high pressure fan gas ring type vacuum pump. High pressure fan, also called high pressure blower, is different from the general centrifugal blower.

[0003] The current market high pressure fan, small flow pressure is high, the shell narrow diameter is big, the shell stability is poor, the shell backboard is very big when the fan runs vibration and pulsation, will directly influence the operation of the fan and the stability of the whole system. The machine shell for conveying phosphoric acid tail gas and other corrosive gas fan is treated with rubber lining, if vibration and pulsation are too large, it is easy to cause the machine shell to peel off and corrode, the maintenance cost is large, and therefore a fan shell with good stability is provided to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the technical problems in the background art, the utility model provides a fan shell with good stability, which has the advantages of enhancing the rigidity of the machine shell, solving the vibration and pulsation of the shell backplate, improving the smooth operation of the fan, etc.

[0005] The utility model provides a fan shell with good stability, which comprises a machine shell, an impeller arranged inside the machine shell, an air inlet formed on the back of the machine shell, an impeller hub arranged on the right side of the impeller, a main shaft limiting hole formed in the inside of the impeller hub, a main shaft penetrating into the inside of the impeller and the main shaft limiting hole in the inside of the impeller hub, a corrosion-proof nut cover arranged on the left side of the impeller hub, four screw holes formed on the left side of the corrosion-proof nut cover, a bolt with one end connected to the left side of the impeller hub arranged in each of the four screw holes, a threaded groove concentric with the main shaft limiting hole formed on the right side of the corrosion-proof nut cover, a frame steel frame fixedly installed on the front and back of the machine shell, a triangular support fixedly installed on the two sides of each frame steel frame, two metal diagonal braces arranged on the front and back of the machine shell, and a reinforcing rib plate arranged on the front and back of the machine shell.

[0006] Preferably, an air outlet is arranged on the top of the machine shell, an axial hole is formed on the front of the machine shell to allow the main shaft to penetrate through, and a supporting circular plate is welded on the front of the machine shell around the axial hole.

[0007] Preferably, the corrosion-proof nut cover is in the shape of an arc formed by outer circle processing, and forms a streamline structure adjacent to the left side arc surface of the impeller hub.

[0008] Preferably, four screw grooves are arranged on the left side of the impeller hub, and correspond to the four screw holes on the anticorrosion nut cover.

[0009] Preferably, a plurality of threads are arranged in the screw groove, and the outer surface of the end of the main shaft close to the anticorrosion nut cover is also provided with a plurality of thread lines connected with the threads in the screw groove.

[0010] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:

[0011] The fan shell with good stability enhances the rigidity of the shell through the reinforcing rib plate and the triangular support, solves the vibration of the back plate of the shell, and makes the fan run stably. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model provides a structure schematic view of a fan shell with good stability.

[0013] Figure 2 The utility model provides a structure schematic view of a fan shell with good stability from another angle.

[0014] Figure 3 The utility model provides a structure schematic view of an impeller in a fan shell with good stability.

[0015] Figure 4 The utility model provides a structure schematic view of an impeller hub in a fan shell with good stability.

[0016] Reference signs: 1, shell; 2, reinforcing rib plate; 3, frame steel frame; 4, triangular support; 5, metal inclined support; 6, main shaft; 7, impeller; 8, air inlet; 9, anticorrosion nut cover; 10, impeller hub; 11, main shaft limiting hole; 12, screw groove; 13, bolt; 14, screw hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0018] In the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the utility model, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, welding, riveting, bonding and the like, or detachable connection, threaded connection, key connection, pin connection and the like, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] As Figures 1-4 shown, the utility model provides a fan shell with good stability, including casing 1, the inside of casing 1 is equipped with impeller 7, the back of casing 1 is equipped with air inlet 8, the right side of impeller 7 is provided with impeller hub 10, the structure for connecting between impeller 7 and main shaft 6, the inside of impeller hub 10 is equipped with main shaft limiting hole 11, the through hole for the limiting of main shaft 6, the front of casing 1 is provided with one end through to the inside of impeller 7 main shaft 6, and the main shaft 6 is through the main shaft limiting hole 11 in the inside of impeller hub 10, for the transmission shaft for connecting between motor and impeller 7, the left side of impeller hub 10 is provided with anticorrosion nut cover 9, the one end of main shaft 6 on the left side of impeller 7 is protected, the left side of anticorrosion nut cover 9 is equipped with four screw holes 14, the inside of four screw holes 14 is provided with one end and the left side of impeller hub 10 is connected bolt 13, the effect of fixing impeller hub 10 and impeller 7, the right side of anticorrosion nut cover 9 is equipped with the same concentric thread groove 12 as main shaft limiting hole 11, anticorrosion nut cover 9 is sleeved on one end of main shaft 6 to seal and prevent corrosion and oxidation, the front and back of casing 1 are both fixedly installed with frame steel 3, the two sides of two frame steels 3 are both fixedly installed with triangular support 4, which plays the effect of supporting casing 1, the front and back of casing 1 are also provided with two metal diagonal braces 5, which also play the effect of supporting casing 1, the front and back of casing 1 are welded with reinforcing rib plates 2 that are crisscrossed, which enhance the rigidity of casing.

[0021] It should be pointed out that the horizontal and vertical spacing of reinforcing rib plate 2 is reduced, which strengthens the strength of both sides of casing 1.

[0022] In an alternative embodiment, the top of the casing 1 is provided with an air outlet, the front of the casing 1 is provided with an axle hole for the main shaft 6 to pass through, and a support round plate is welded on the front of the casing 1 around the axle hole.

[0023] In an alternative embodiment, the corrosion-proof nut cover 9 is arc-shaped and is machined in a circular shape, and is adjacent to the left side arc of the impeller hub 10 to form a streamline structure.

[0024] In an alternative embodiment, four screw grooves are formed on the left side of the impeller hub 10, and correspond to the four screw holes 14 on the corrosion-proof nut cover 9.

[0025] In an alternative embodiment, the screw groove 12 is internally provided with multiple threads, and the outer surface of the end of the main shaft 6 close to the corrosion-proof nut cover 9 is also provided with multiple threads connected to the threads in the screw groove 12.

[0026] Working principle: when the surface strength of the casing needs to be increased, the reinforcing rib plate 2, the metal inclined brace 5 and the two triangular supports 4 on the frame-shaped steel frame 3 welded on the surface of the casing 1 can be used to support the two side plates of the casing 1, so as to increase the rigidity and realize the stability of the operation of the casing 1; when the corrosion-proof nut cover 9 is fixed on the impeller hub 10 through the screw groove 12 and the main shaft 6, and the main shaft 6 and the impeller hub 10 are fixed through the screw hole 14 and the bolt 13, the shaft head of the main shaft 6 is not directly in contact with the gas, so as to achieve the effect of protecting the shaft head from being eroded.

[0027] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A fan housing with good stability, comprising a casing (1), an impeller (7) is arranged in the casing (1), and an air inlet (8) is arranged on the back of the casing (1), characterized in that, The right side of the impeller (7) is provided with an impeller hub (10), the inside of the impeller hub (10) is provided with a main shaft limiting hole (11), the front of the casing (1) is provided with a main shaft (6) penetrating into the inside of the impeller (7), and the main shaft (6) penetrates the main shaft limiting hole (11) in the inside of the impeller hub (10), the left side of the impeller hub (10) is provided with a corrosion-proof nut cover (9), the left side of the corrosion-proof nut cover (9) is provided with four screw holes (14), the inside of the four screw holes (14) is provided with a bolt (13) with one end connected with the left side of the impeller hub (10), the right side of the corrosion-proof nut cover (9) is provided with a threaded groove (12) concentric with the main shaft limiting hole (11), the front and back of the casing (1) are both fixedly installed with a frame steel frame (3), the two sides of the two frame steel frames (3) are both fixedly installed with a triangular support (4), the front and back of the casing (1) are also provided with two metal inclined braces (5), and the front and back of the casing (1) are welded with reinforcing rib plates (2) intersecting longitudinally and transversely.

2. The fan housing with good stability according to claim 1, characterized in that: The top of the casing (1) is provided with an air outlet, the front of the casing (1) is provided with an axle hole through which the main shaft (6) penetrates, and the front of the casing (1) is welded with a supporting circular plate around the axle hole.

3. The fan housing with good stability according to claim 1, characterized in that: The corrosion-proof nut cover (9) is arc-shaped and machined from an outer circle, and is adjacent to the left side surface arc of the impeller hub (10) to form a streamline structure.

4. The fan housing of claim 1, wherein: The left side surface of the impeller hub (10) is provided with four screw grooves corresponding to the four screw holes (14) on the corrosion-proof nut cover (9).

5. The fan housing of claim 1, wherein: The inside of the threaded groove (12) is provided with multiple threads, and the outer surface of one end of the main shaft (6) close to the corrosion-proof nut cover (9) is also provided with multiple threads connected with the threads in the inside of the threaded groove (12).

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