CN218151631U - Blade convenient for fastening and adjusting angle in axial flow fan - Google Patents

Abstract

The utility model discloses a be convenient for fasten and angle regulation's blade among axial fan, be provided with the connector that has the ring channel on the blade, be provided with the snap ring on the connector, be provided with annular boss on the end wall of connector, the equipartition has a plurality of spacing draw-in grooves on annular boss, the symmetry sets up two outer fixture blocks on the lateral wall of snap ring, the symmetry is provided with two interior fixture blocks on the inside wall of snap ring, the interior fixture block that is located the upside stretches out in the snap ring under the slant, the interior fixture block that is located the downside stretches out in the snap ring in the slant, through circular arc transitional coupling between snap ring and the interior fixture block. The utility model has the advantages of: the blade is connected with the hub through the connector, the snap ring, and the two inner clamping blocks on the snap ring can compensate the gap between the connector and the connecting sleeve under the action of the elastic force, so that the connector is firmly fixed in the connecting sleeve, the blade cannot shake when rotating, and the angle of the blade can be accurately adjusted.

Description

Blade convenient for fastening and adjusting angle in axial flow fan

Technical Field

The utility model relates to an axial fan field especially relates to the blade of being convenient for fastening and angle regulation among the axial fan.

Background

In an axial flow fan, the blade angle in an axial flow impeller plays a decisive role in the performance of the impeller. The impeller structure in the axial flow fan on the market at present is as follows: the method comprises the following steps: the axle sleeve that links to each other with the motor is connected with wheel hub on the axle sleeve, has a plurality of adapter sleeves along the circumference equipartition on wheel hub, is connected with the blade in the adapter sleeve, wheel hub includes: the upper half wheel hub and the lower half wheel hub are provided with a plurality of semicircular connecting covers along the circumference, arc-shaped bosses are arranged on the semicircular connecting covers, connecting grooves are formed in the inner walls of the semicircular connecting covers, when the upper half wheel hub and the lower half wheel hub are combined to form the wheel hub, the semicircular connecting covers of the upper half wheel hub and the semicircular connecting covers of the lower half wheel hub are combined to form connecting sleeves with inner ring bosses, the connecting grooves of the upper half wheel hub and the connecting grooves of the lower half wheel hub are communicated to form a straight line groove, a connecting head is arranged at the root of each blade, an annular groove is formed in the connecting head, a plurality of clamping grooves are uniformly distributed in the end wall of the connecting head, a cover plate is clamped on the end wall of the connecting head through the clamping grooves, clamping teeth with the same number as the clamping grooves are arranged on one side wall of the cover plate, and a limiting rod matched with the straight line groove is arranged on the other side wall of the cover plate. The blades are clamped into a connecting sleeve in the hub through the connecting head, an inner ring boss in the connecting sleeve is clamped into an annular groove of the connecting head, a cover plate clamped on the connecting head is clamped into a linear groove in the connecting sleeve through a limiting rod, the blades are fixed on the hub to form an impeller, and then the angles of the blades can be adjusted by rotating the angles between the blades and the cover plate.

However, the above-mentioned connection structure between the blade and the hub has the following disadvantages: 1. the clamping teeth on the cover plate are equal to the clamping grooves on the connector in number, when the clamping teeth and the clamping grooves are clamped, the gap between the clamping teeth and the clamping grooves is small, otherwise, the clamping teeth are easy to shake, the balance of the blade during rotation is affected, but the clamping teeth are easy to collide with the clamping grooves after the clamping teeth are too large in number, so that the clamping teeth are damaged; 2. in order to make things convenient for the connector to be connected with the adapter sleeve in the wheel hub, behind the adapter sleeve in the wheel hub is gone into to the connector card, there is certain clearance between the end wall of connector and the inner wall of adapter sleeve, this clearance can make the blade take place to rock when rotating and influence the equilibrium of blade, the apron can take place the displacement between the end wall of connector and the inner wall of adapter sleeve when rotating, it narrows down just to make the latch wearing and tearing on the apron easy for long-time the displacement, draw-in groove wearing and tearing widen on the connector, will further influence the equilibrium of blade after the clearance grow between latch and the draw-in groove.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be convenient for fasten and angle regulation's blade among axial fan, its angle that can conveniently adjust the blade can guarantee the equilibrium of blade when the rotation again.

In order to achieve the above object, the utility model adopts the following technical scheme: the blade is convenient for fastening and adjusting the angle in the axial flow fan, a connector is arranged at the root of the blade, an annular groove is arranged on the connector, a clamping ring which can be clamped with a linear groove in a hub is arranged on the connector, an annular boss is arranged on the end wall of the connector, a plurality of limiting clamping grooves are uniformly distributed on the annular boss along the circumference, zero-position scales are arranged on the end wall of the connector, the zero-position scales are aligned with the limiting clamping grooves which are vertical to the blade surface of the blade, two outer clamping blocks are symmetrically arranged on the outer side wall of the clamping ring and are respectively matched with the two symmetrical limiting clamping grooves, two inner clamping blocks are symmetrically arranged on the inner side wall of the clamping ring and are matched with the linear groove in the hub, the lower side of the inner clamping block on the upper side obliquely downwards extends out of the clamping ring, the inner clamping block obliquely upwards extends out of the clamping ring, the length of the two inner clamping blocks extending out of the clamping ring is not shorter than the sum of the depth of the linear groove and the distance between the end wall of the connector and the inner wall of the hub connecting sleeve, and the clamping ring is in transition connection with the inner clamping block through an arc.

Furthermore, among the aforementioned axial fan, the blade convenient for fastening and angle regulation, wherein, be provided with a plurality of ribs on the diapire of ring channel.

Furthermore, be convenient for fasten and angle regulation's blade among the aforementioned axial fan, wherein, connector and blade are by the integrative casting shaping of die-casting aluminium, are provided with arc connecting portion between blade and connector.

Furthermore, among the aforementioned axial fan, the blade convenient for fastening and angle adjustment, wherein, be provided with the lightening hole on the end wall of connector.

Furthermore, in the blade convenient for fastening and adjusting the angle in the axial flow fan, thirty-six limiting clamping grooves are uniformly distributed on the annular boss along the circumference, the included angle between every two adjacent limiting clamping grooves is 10 degrees, and the included angle between the adjacent outer clamping block and the inner clamping block is 20 degrees.

Further, among the aforesaid axial fan be convenient for fasten and angle regulation's blade, wherein, thirty six recesses have been equipped with along the circumference equipartition on the inside wall of annular boss, each recess respectively with each spacing draw-in groove one-to-one.

The utility model has the advantages of: 1. the blade is connected with the hub through the connecting head and the clamping ring, and the two inner clamping blocks on the clamping ring can compensate for the gap between the connecting head and the connecting sleeve under the action of elasticity, so that the connecting head is firmly fixed in the connecting sleeve, and the blade cannot shake during rotation; 2. the clamping ring is connected with the two limiting clamping grooves which are symmetrically arranged on the connecting head through the two outer clamping blocks, so that the connection is convenient, and the situation that the outer clamping blocks collide with the limiting clamping grooves is not easy to occur; 3. the angle of the blade can be accurately adjusted.

Drawings

Fig. 1 is a schematic view of an explosion structure of a blade of an axial flow fan, which is convenient for fastening and adjusting the angle.

Fig. 2 is a partially enlarged schematic view in the direction a of fig. 1.

Fig. 3 is a schematic view of the structure in the viewing direction of fig. 1.

Fig. 4 is a schematic structural view of the axial flow fan in which blades for facilitating fastening and angle adjustment are connected to a lower half hub of the hubs.

Fig. 5 is a partially enlarged structural view in the direction B in fig. 4.

Detailed Description

The technical solution of the present invention will be further described with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, fig. 2, fig. 3, axial fan in be convenient for fastening and angle regulation's blade, be provided with connector 2 at blade 1's root, connector 2 is pour the shaping by die-casting aluminium with blade 1, be provided with the arc connecting portion between blade 1 and connector 2, the blade 1 of die-casting aluminium material is difficult to take place the condition of bending deformation when depositing, the joint strength between blade 1 and connector 2 can be strengthened to the arc connecting portion, can also prevent to take place to split because of stress concentration. Be provided with ring channel 21 on connector 2, be provided with a plurality of ribs 22 on the diapire of ring channel 21, rib 22 can strengthen ring channel 21's intensity, can strengthen the coefficient of friction between the adapter sleeve in connector 2 and the wheel hub again to strengthen the connection stability between the adapter sleeve in connector 2 and the wheel hub. The blade connecting structure is characterized in that a clamping ring 3 capable of being clamped with a linear groove in a hub is arranged on the connector 2, an annular boss is arranged on the end wall of the connector 2, thirty-six limiting clamping grooves 23 are uniformly distributed on the annular boss along the circumference, the included angle between every two adjacent limiting clamping grooves 23 is 10 degrees, zero-position scales 26 are arranged on the end wall of the connector 2, the zero-position scales 26 are aligned with the limiting clamping grooves 23 perpendicular to the blade surface of the blade 1, 10 degrees are increased when every one limiting clamping groove 23 is increased from the zero-position scales 26, thirty-six grooves 24 are uniformly distributed on the inner side wall of the annular boss along the circumference, the grooves 24 respectively correspond to the limiting clamping grooves 23 one by one, reinforcing ribs are formed between every two adjacent grooves 24, the rigidity and the strength of the annular boss are increased, lightening holes 25 are formed in the end wall of the connector 2, the weight of the blade 1 is reduced, and energy conservation is realized by reducing the weight of the blade 1. Two outer fixture blocks 31 are symmetrically arranged on the outer side wall of the clamping ring 3, the two outer fixture blocks 31 are respectively matched with two symmetrical limiting clamping grooves 23, two inner fixture blocks 32 are symmetrically arranged on the inner side wall of the clamping ring 3, the two inner fixture blocks 32 are matched with straight line grooves in the wheel hub, an included angle between each adjacent outer fixture block 31 and each inner fixture block 32 is 20 degrees, and the angle of each blade 1 can be accurately adjusted through an included angle between each adjacent outer fixture block 31 and each adjacent inner fixture block 32 and an included angle between each two adjacent limiting clamping grooves 23. The inner clamping block 32 located on the upper side obliquely extends downwards out of the clamping ring 3, the inner clamping block 32 located on the lower side obliquely extends upwards out of the clamping ring 3, the length of the two inner clamping blocks 32 extending out of the clamping ring 3 is not shorter than the sum of the depth of the linear groove and the distance between the end wall of the connector 2 and the inner wall of the hub connecting sleeve, the clamping ring 3 and the inner clamping block 32 are connected in a circular arc transition mode, the inner clamping block 32 has elasticity, and the connection strength between the inner clamping block 32 and the clamping ring 3 can be improved after the inner clamping block 32 and the clamping ring 3 are connected in a circular arc transition mode.

As shown in fig. 4 and 5, first, two outer fixture blocks 31 on the snap ring 3 are clamped with the limiting clamp groove 23 on the connector 2, any one outer fixture block 31 on the snap ring 3 is clamped with the limiting clamp groove 23 aligned with the zero scale 26, then the connector 2 together with the snap ring 3 is clamped into the semicircular connecting cover in the lower half hub, the rib 22 on the annular groove 21 in the connector 2 is contacted with the inner annular boss in the lower half hub, the rib 22 increases the friction coefficient between the connector 2 and the inner annular boss in the lower half hub, any one inner fixture block 32 is clamped into the linear groove of the lower half hub, the inner fixture block 32 pushes the connector 2 under the action of elastic force, the connector 2 is tightly attached to the semicircular connecting cover of the lower half hub, then the upper half hub and the lower half hub are abutted, so that the blade 1 is tightly fixed in the hub, the blade 1 does not shake when rotating, and at this time, the included angle between the blade 1 and the hub is 20 °. When the angle of the blade 1 needs to be adjusted, only the upper hub and the lower hub need to be disassembled, the snap ring 3 and the connector 2 on the blade 1 are taken out from the semicircular connecting cover of the lower hub, then the connector 2 is rotated, the outer clamping block 31 clamped with the limiting clamping groove 23 aligned with the zero scale 26 on the snap ring 3 is clamped with other limiting clamping grooves 23 on the connector 2, and the included angle between the blade 1 and the hub can be obtained by counting the number of the limiting clamping grooves 23 from the limiting clamping groove 23 aligned with the zero scale 26 to the limiting clamping groove 23 newly clamped with the outer clamping block 31, so that the angle of the blade 1 can be accurately adjusted.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (6)

1. The blade of being convenient for fastening and angle regulation in the axial fan is provided with the connector at the root of blade, is provided with ring channel, its characterized in that on the connector: the connecting head is provided with a clamping ring which can be clamped with a linear groove in a hub, an annular boss is arranged on the end wall of the connecting head, a plurality of limiting clamping grooves are uniformly distributed on the annular boss along the circumference, the end wall of the connecting head is provided with a zero-position scale, the zero-position scale is aligned with the limiting clamping grooves which are vertical to the blade surface of the blade, two outer clamping blocks are symmetrically arranged on the outer side wall of the clamping ring, the two outer clamping blocks are respectively matched with the two symmetrical limiting clamping grooves, two inner clamping blocks are symmetrically arranged on the inner side wall of the clamping ring, the two inner clamping blocks are matched with the linear groove in the hub, the inner clamping block positioned on the upper side obliquely downwards extends out of the clamping ring, the inner clamping block positioned on the lower side obliquely upwards extends out of the clamping ring, the length of the two inner clamping blocks extending out of the clamping ring is not shorter than the sum of the depth of the linear groove and the distance between the end wall of the connecting head and the inner wall of the hub connecting sleeve, and the clamping ring is in transition connection with the inner clamping block through an arc.

2. The axial flow fan as claimed in claim 1, wherein the blade for facilitating fastening and angle adjustment comprises: the bottom wall of the annular groove is provided with a plurality of ribs.

3. The blade facilitating fastening and angle adjustment in an axial flow fan according to claim 1, wherein: the connector is poured the shaping by die-casting aluminium an organic whole with the blade, is provided with arc connecting portion between blade and connector.

4. The axial flow fan as claimed in claim 1, wherein the blade for facilitating fastening and angle adjustment comprises: the end wall of the connector is provided with a lightening hole.

5. The blade facilitating fastening and angle adjustment in an axial flow fan according to claim 1, wherein: thirty-six limiting clamping grooves are uniformly distributed on the annular boss along the circumference, the included angle between every two adjacent limiting clamping grooves is 10 degrees, and the included angle between the adjacent outer clamping block and the inner clamping block is 20 degrees.

6. The axial flow fan blade facilitating fastening and angle adjustment according to claim 5, wherein: thirty-six grooves are uniformly distributed on the inner side wall of the annular boss along the circumference, and each groove is in one-to-one correspondence with each limit clamping groove.

Images