CN218454843U - Fan equipment with reliable volute device - Google Patents

Abstract

The utility model belongs to the technical field of fan equipment, concretely relates to fan equipment of reliable spiral case device in area, include: the drainage chamber comprises a front end drainage chamber and a drainage cavity arranged in the middle of the rear end of the drainage chamber, centrifugal impellers rotating at a constant speed and in different directions are symmetrically arranged on two sides of the drainage chamber, n vortex blades are arranged in the centers of the centrifugal impellers, and the phase difference angle between the centrifugal impellers on the two sides is correspondingly set to be pi/n; the rear diversion chamber comprises volute enclosing plates arranged on the front side and the rear side, the inner outline of each volute enclosing plate is connected with a volute bottom plate, and the outer outline of each volute enclosing plate is connected with a volute back plate. The centrifugal impellers which are symmetrically arranged and rotate at constant speed in different directions are of a clover structure, the centrifugal impellers are all provided with a plurality of vortex blades, the vortex blades push airflow flow collection and acceleration, the flow collection ports accelerate airflow, the shallow micro counter bores can be used for noise reduction, the phase difference is accurately calibrated and measured by the phase meter, and the effect of improving the flow speed and eliminating the noise of the fan equipment with the reliable volute device is comprehensively realized.

Description

Fan equipment with reliable volute device

Technical Field

The utility model belongs to the technical field of fan equipment, concretely relates to fan equipment of reliable spiral case device in area.

Background

The centrifugal fan is a fluid machine for improving gas pressure by inputting energy, is widely applied to various occasions by the characteristics of large suction force, low noise and compact structure, and has an energy transfer conversion process of accelerating and changing gas by rotating a centrifugal impeller at a high speed and converting kinetic energy into potential energy or pressure; the centrifugal fan generally comprises a volute and a centrifugal impeller, wherein air inlets are formed in two sides of a single side of the volute, an air outlet is formed in the tangential direction of the volute, the centrifugal impeller rotates with fluid to generate centrifugal force, the fluid acquires kinetic energy along a blade flow channel and enters the volute at high speed, the flow channel gradually becomes wider to enable the fluid to be decelerated, part of the kinetic energy is converted into static pressure energy, and higher pressure flows to the air outlet. The volute is a volute type drainage chamber for short, the cross section of the volute gradually changes to ensure uniform-speed discharge, the flow is preset to reduce the flow guiding strength, the proper shape is maintained to avoid too fast energy attenuation, and the thickness of the volute material is correspondingly adjusted according to stress; the stress on the volute is related to the thin-wall stress caused by the internal pressure, and also related to the local stress caused by different thicknesses and different strengths at the joint of the base of the volute and in the longitudinal section.

The centrifugal force generated by the air flowing through the curved flow channel enables the inner edge and the outer edge of the volute to have pressure difference, the pressure difference depends on the air flow speed and the sudden change of the section profile, the average flow speed is in direct proportion to the flow passing through the section, and therefore the pressure difference value between the inner edge and the outer edge of the volute reflects the relative value of the flow passing through the fan.

In order to effectively improve the efficiency of the centrifugal fan, the most direct effect is to select a large chamber and a high rotating speed, but the design of the large chamber can cause the dead weight of the body type and has no feasibility, and the high rotating speed setting inevitably leads to overhigh noise and lack of practicability due to severe type selection, so that the reasonable and perfect multiple air inlet is an important link for solving the problem by matching with volute transmission.

In order to reduce or eliminate abnormal pressure fluctuation, effective pressure stabilization measures are to increase symmetrical linear damping on the basis of a transmission pressure system, such as adding throttling pressure stabilization equipment and the like; the possibility of increasing noise is finally increased inevitably due to the steep increase of the airflow speed, so that active measures are taken to eliminate noise and avoid the howling and hoarseness phenomena possibly caused by resonance while the airflow speed is increased positively.

Chinese patent with current publication number CN214887930U discloses an evaporation fan, including spiral case front bezel, spiral case air duct board, spiral case back plate, outlet flue connecting plate and outlet flue, the spiral case front bezel is provided with into the mouth of cigarette, and the board encloses into the outlet flue behind spiral case front bezel, spiral case air duct board, the spiral case, and outlet flue connecting plate and outlet flue are located outlet flue top, its characterized in that: the volute air duct plate comprises a volute front plate, a volute rear plate and a volute air duct plate extending part, wherein the volute front plate is provided with a volute front plate elongated hole matched with the volute air duct plate extending part, the volute rear plate is provided with a volute rear plate elongated hole matched with the volute air duct plate extending part, the volute air duct plate extending part penetrates through the volute front plate elongated hole to be bent and fastened, and the volute air duct plate extending part penetrates through the volute rear plate elongated hole to be bent and fastened. The utility model discloses a through overcoming welding defect, thereby effectively overcome the oil smoke and corrode and age invasion and attack increase of service life, simple structure to reduce tooling die's cost of manufacture.

The above prior art solutions have the following drawbacks: although the problem of welding defects is solved by additionally arranging the volute air duct plate and the rear plate, the blower equipment with the reliable volute device is still lacked, so that the problems of improving the air blowing flow rate and reducing the air blowing noise are fundamentally solved in structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take fan equipment of reliable spiral case device satisfies the demand that improves the blast air velocity of flow and reduce the blast air noise to effectively guarantee the safety and stability of taking fan equipment of reliable spiral case device and reliably perfect.

In order to solve the technical problem, the utility model provides a fan equipment of reliable spiral case device in area, include: the drainage chamber is arranged at the front end of the drainage chamber, the rear end of the drainage chamber is provided with a drainage cavity, the drainage cavity is connected with the middle part of the drainage chamber, and centrifugal impellers for constant-speed and different-direction rotation are symmetrically arranged on two sides of the drainage chamber; the centrifugal impeller is characterized in that n vortex blades are arranged at the center of the centrifugal impeller, phase difference angles between two sides of the centrifugal impeller and corresponding to the vortex blades are set to be pi/n, the axial distance of the centrifugal impeller and the specification of the vortex blades are correspondingly set, the centrifugal impeller and the drainage cavity are axially parallel, the rear end of the drainage cavity is connected with the volute body, and the volute body comprises a volute lining arranged inside and a volute shell arranged outside.

Furthermore, a good effect of speed increasing and noise reduction is achieved for propelling fan equipment with a reliable volute device, a through cavity is accommodated between the volute liner and the volute casing, an air inlet is formed in the front end of the through cavity, an air outlet is formed in the rear end of the through cavity, the air inlet is coaxially communicated with the drainage cavity, a volute tongue used for wind pulling and drainage is arranged at the bottom of the air outlet in an inwards concave mode, and a plurality of reinforcing rib plates are connected between the volute liner and the volute casing.

Furthermore, in order to promote the flow collection and speed increase of a centrifugal impeller of the fan equipment with the reliable volute device, a plurality of flow collection ports for increasing the speed of air flow are arranged in front of the centrifugal impeller, and the centrifugal impeller is electrically connected with a stepping motor.

Furthermore, for promoting the fan equipment with the reliable volute device to construct a surface mechanism for noise reduction, a plurality of shallow micro counter bores for noise reduction are densely arranged in the circumferential direction of the through cavity, and sound absorbing layers are arranged in the drainage chamber, the drainage cavity and the through cavity.

Furthermore, in order to achieve the phase difference between the precisely controlled scroll blades of the fan equipment with the reliable scroll casing device, a plurality of detection rods for monitoring are arranged on the periphery of the centrifugal impeller, and the detection rods are electrically connected with an external phase instrument.

Further, for the security and protection measure of the fan equipment anti-accident interference collision of the reliable volute device in perfect area, the indoor torque sensor who is used for sensing the torque pressure that is equipped with of drainage, torque sensor electricity is connected step motor.

Furthermore, in order to provide the fan equipment with the reliable volute device with the enabling function of centralized control and unified processing, the stepping motor, the torque sensor and the peripheral phase meter are all electrically connected with the master control station.

The utility model has the advantages that:

1. through the centrifugal impellers symmetrically arranged on two sides of the drainage bin and rotating at constant speed in different directions, the n value of each suggested vortex blade is 3, and the phase difference angle between the corresponding vortex blades of the centrifugal impeller with the clover structure is 60 ⁰ Too large n value easily causes the size of the vortex blade to be too small and the matching to be difficult; compared with the non-contact meshing of gears, the axial distance between centrifugal impellers on two sides, the shape of the vortex blades and the safety margin are reasonably configured, and the circulating pushing airflow and the orderly flow collection speed increase between the vortex blades on the two sides can be realized; the proposal is that any centrifugal impeller is in transition engagement with a middle wheel or a reducer to the centrifugal impeller on the other side, the vortex blades on the two sides are reversely installed and dislocated at a set angle to avoid collision interference, the resultant force applies energy to the gas to enable the gas to enter the through cavity along the drainage cavity through the flow collecting port to complete the speed increase before the gas flow, the centrifugal impellers on the two sides are reversely rotated and in staggered phase to complete the speed increase in the gas flow, the drainage cavity is gathered by double holes to enter the through cavity through the air inlet, the volume is small to realize the speed increase after the gas flow through choking, and the bottleneck of the volute tongue is narrowed to boost the flow speed; according to the Bernoulli equation closed region energy conservation law, the high-speed airflow is formed by extending and guiding the airflow through the cavity and flows to the air outlet, and partial dynamic pressure is converted into static pressure; the through cavity is internally provided with a plurality of counter bores with different depths, the multi-cavity structure of the counter bores forms a resistive anti-resonance silencer to enhance the noise reduction effect, the sound absorption layer can remove the sound and reduce the noise, the reinforcing rib plates are reinforced, maintained and stable, and are balanced and divided to avoid the surge flow phenomenon, and the requirements of fan equipment with a reliable volute device on improving the flow speed and reducing the noise are met.

2. Whether the phase difference between the corresponding scroll blades on the two sides meets the set deviation or not is accurately calibrated by additionally arranging a detection rod connected with a phase meter so as to ensure that the matching dislocation accurately runs; if interference extrusion collision happens, the phenomenon of torque pressure steep increase is certainly caused, so that a torque sensor is arranged to accurately sense the change condition of the torque pressure, the problem of failure caused by sudden accidents or airflow variation is effectively solved, a multi-component connection master console is convenient to intensively manage and control and uniformly process, timely feedback and quick response are completed, and the safe, reliable, stable and lasting effects of fan equipment with a reliable volute device are comprehensively realized.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a blower apparatus with a reliable volute device according to the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is an enlarged sectional view taken at B in fig. 1.

In the figure:

1. a drainage bin; 2. a volute housing; 3. a drainage chamber; 4. a drainage lumen; 5. a centrifugal impeller; 6. a swirl vane; 7. a volute liner; 8. a volute housing; 9. the cavity is communicated; 10. an air inlet; 11. an air outlet; 12. a volute tongue; 13. a reinforcing rib plate; 14. a flow collection port; 15. a stepping motor; 16. shallow micro counter bore; 17. a sound absorbing layer; 18. a detection rod; 19. a torque sensor. (the circled part in the figure is a partial section)

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are described clearly and completely below with reference to the accompanying drawings. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 3, the blower apparatus with reliable volute device of the present invention comprises: the drainage device comprises a drainage bin 1 and an arc volute body 2 arranged at the rear end of the drainage bin 1, wherein a drainage chamber 3 is arranged at the front end of the drainage bin 1, a drainage cavity 4 is arranged at the rear end of the drainage chamber 3, the drainage cavity 4 is connected with the middle part of the drainage chamber 3, centrifugal impellers 5 for constant-speed counter-rotation are symmetrically arranged on two sides of the drainage chamber 3, n vortex blades 6 are arranged at the centers of the centrifugal impellers 5, the phase difference angle between the corresponding vortex blades 6 on the two sides is set to be pi/n, the axial distance of the centrifugal impellers 5 is arranged corresponding to the specification of the vortex blades 6, and the centrifugal impellers 5 are axially parallel to the drainage cavity 4; the rear end of the drainage cavity 4 is connected with the volute body 2, and the volute body 2 comprises a volute inner liner 7 arranged inside and a volute outer shell 8 arranged outside. A through cavity 9 is accommodated between the volute liner 7 and the volute casing 8, an air inlet 10 is arranged at the front end of the through cavity 9, an air outlet 11 is arranged at the rear end of the through cavity 9, the air inlet 10 is coaxially communicated with the drainage cavity 4, a volute tongue 12 for drawing out air and conducting drainage is concavely arranged at the bottom of the air outlet 11, and a plurality of reinforcing rib plates 13 are connected between the volute liner 7 and the volute casing 8. A plurality of collecting ports 14 for accelerating the airflow are arranged in front of the centrifugal impeller 5, and the centrifugal impeller 5 is electrically connected with a stepping motor 15. The through cavity 9 is circumferentially and intensively provided with a plurality of shallow micro counter bores 16 for noise reduction and noise reduction, and the drainage chamber 3, the drainage cavity 4 and the through cavity 9 are all internally provided with sound absorbing layers 17.

Obviously, in this embodiment, the centrifugal impellers 5 rotating at the same speed and in different directions are symmetrically arranged on both sides of the drainage bin 1, the number n of the scroll blades 6 uniformly distributed on the periphery of the centrifugal impeller 5 includes but is not limited to 3, and the phase difference between the scroll blades 6 corresponding to the centrifugal impeller 5 with the three-leaf structure is 60 ⁰ The axial distance between the centrifugal impellers 5 on the two sides, the shape of the vortex blade 6 and the matching safety margin are accurately set, so that the airflow is circularly pushed to flow and speed up; the intermediate wheel or the reducer is suggested to be in a transition meshing mode to finish constant speed and different direction of the vortex blades 6 on the two sides, and the flow collecting port 14 promotes airflow flow collection and speed increase; the airflow extends from the drainage cavity 4 to the air outlet 11 through the through cavity 9; the air flows into the flow collecting port 14, the flow path is narrowed suddenly and the speed is increased before the choke is finished, the double-shaft back-to-back differential rotation centrifugal impeller 5 is in staggered phase to finish the speed increase in the air flow, the drainage cavity 4 with two holes gathered together enters the through cavity 9, the volume is sharply reduced to form the choke to realize the speed increase after the air flow, and the volute tongue 12 pulls out the wind and conducts the flow to boost the flow rate; the shallow micro-counter bore 16 with variable diameter and different depth is integrally cast or forged in the through cavity 9The multi-cavity resistive anti-resonance silencer is used for noise reduction, the sound absorption layer 17 can remove sound and reduce noise, the reinforcing rib plates 13 are reinforced, maintained and stable, and flow-surge is avoided by balanced shunting, and the aim of improving the flow speed and reducing noise of fan equipment with a reliable volute device is fulfilled.

As shown in fig. 1 to 3, the periphery of the centrifugal impeller 5 is provided with a plurality of detection rods 18 for monitoring, and the detection rods 18 are electrically connected with an external phase meter. A torque sensor 19 for sensing torque pressure is arranged in the drainage chamber 3; the torque sensor 19 is electrically connected to the stepping motor 15. The stepping motor 15, the torque sensor 19 and the peripheral phase meter are all electrically connected with the main control console.

More specifically, in the embodiment, the phase difference between the two side scroll blades 6 is accurately measured by the phase measurement detection bar 18 to ensure the phase-staggered relay; the torque sensor 19 senses the torque change condition, so that the problem of faults caused by unexpected accidents or airflow variation is prevented, the multi-component connection main control console is convenient for centralized management and control and unified treatment, rapid response is fed back in time, and the effects of safety, reliability, stability and durability of the fan equipment with the reliable volute device are comprehensively realized.

To sum up, the blower equipment with the reliable volute device of the utility model is provided with a plurality of vortex blades 6 uniformly distributed on the symmetrically arranged constant-speed incongruous rotating centrifugal impellers 5 to form a clover structure, the axial distance between the centrifugal impellers 5 at two sides, the shape of the vortex blades 6 and the safety margin of the staggered phase force are accurately matched, the circulation action of the vortex blades 6 is completed to accelerate the airflow, the air collecting port 14 is used for drawing out and guiding the airflow, and the airflow extends to the air outlet 11 from the drainage cavity 4 through the through cavity 9 by guiding; the diameter-variable different-depth micro-counter bore 16 forms a resistive anti-resonance silencer for noise reduction, the sound absorption layer 17 is used for noise reduction, the volute tongue 12 is used for drawing wind and conducting to boost the flow velocity in an assisting mode, and the reinforcing rib plate 13 is used for reinforcing, maintaining stability and balancing flow distribution; the phase difference between the vortex blades 6 is accurately calibrated by the phase measurement detection rod 18, the torque is accurately measured by the torque sensor 19 to be taken as a security measure, and the effects of improving the flow speed and eliminating noise of the fan equipment with the reliable volute device are comprehensively realized.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations and relationships based on the orientations and relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. A blower apparatus with a reliable volute means, comprising; the drainage device comprises a drainage bin (1) and an arc-shaped volute body (2) arranged at the rear end of the drainage bin (1);

the drainage chamber (3) is arranged at the front end of the drainage bin (1), the drainage cavity (4) is arranged at the rear end of the drainage chamber (3), and the drainage cavity (4) is connected with the middle part of the drainage chamber (3);

centrifugal impellers (5) for constant-speed and opposite-direction rotation are symmetrically arranged on two sides of the drainage chamber (3);

n vortex blades (6) are arranged at the centers of the centrifugal impellers (5);

the phase difference angle between the two sides corresponding to the vortex blades (6) is pi/n;

the axial distance of the centrifugal impeller (5) is arranged corresponding to the specification of the vortex blade (6);

the centrifugal impeller (5) and the drainage cavity (4) are axially parallel;

the rear end of the drainage cavity (4) is connected with the volute body (2);

the volute body (2) comprises a volute liner (7) arranged inside and a volute shell (8) arranged outside.

2. Blower equipment with reliable volute means according to claim 1, characterized in that between said volute liner (7) and said volute casing (8) there is housed a through-cavity (9);

the front end of the through cavity (9) is provided with an air inlet (10), and the rear end is provided with an air outlet (11);

the air inlet (10) is coaxially communicated with the drainage cavity (4);

a volute tongue (12) for drawing wind and conducting flow is concavely arranged at the bottom of the air outlet (11);

a plurality of reinforcing rib plates (13) are connected between the volute liner (7) and the volute casing (8).

3. Fan apparatus with reliable volute means according to claim 1, characterized in that the centrifugal impeller (5) is frontally provided with a plurality of collecting ports (14) for the acceleration of the air flow;

the centrifugal impeller (5) is electrically connected with a stepping motor (15).

4. The fan apparatus with reliable volute means according to claim 2, wherein said through cavity (9) is circumferentially densely provided with a plurality of shallow micro-counter bores (16) for noise reduction;

the drainage chamber (3), the drainage cavity (4) and the through cavity (9) are all internally provided with a sound absorbing layer (17).

5. Fan apparatus with reliable volute means according to claim 1, characterized in that the centrifugal impeller (5) is peripherally provided with a plurality of detection bars (18) for monitoring;

the detection rod (18) is electrically connected with an external phase instrument.

6. A fan apparatus with reliable volute means according to claim 3, wherein a torque sensor (19) for sensing torque pressure is provided in the flow-guiding chamber (3);

the torque sensor (19) is electrically connected with the stepping motor (15).

7. The blower apparatus with reliable volute means of claim 6, wherein the stepper motor (15), the torque sensor (19), and the peripheral phase meter are all electrically connected to the console.

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