CN215170856U

CN215170856U - Centrifugal blower

Info

Publication number: CN215170856U
Application number: CN202022610514.2U
Authority: CN
Inventors: 罗门波; 骆骞; 尚小洲; 袁敏; 徐斌
Original assignee: Shaanxi Jiahui Power Technology Co ltd
Current assignee: Shaanxi Jiahui Power Technology Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-12-14
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a centrifugal blower, including spiral case, rotor and casing, drive arrangement, the both sides of spiral case are all installed the casing, the air outlet of casing is connected with the collector, the collector is located the inside of spiral case, the rotor includes three-dimensional flow impeller and pivot, three-dimensional flow impeller installs in the pivot, just three-dimensional flow impeller is located inside the collector, the pivot both ends are passed the casing, just the pivot is passed through the bearing frame and is supported. The utility model has the advantages that: the three-dimensional flow blade is designed to be zero-attack-angle air inlet, so that the surface load distribution of the three-dimensional flow blade is uniform, the three-dimensional flow blade is more suitable for the three-dimensional motion rule of fluid and has superior flow characteristics, better airflow flow characteristics can be obtained, the energy loss of a fan during operation can be reduced, the air inflow of the fan can be obviously improved through the double air inlets of the shell, and the working efficiency is improved.

Description

Centrifugal blower

Technical Field

The utility model relates to an air-blower field, especially a centrifugal air-blower.

Background

Theoretically, the pressure-flow characteristic curve of a centrifugal blower is a straight line, but because of the loss such as frictional resistance in the blower, the actual pressure-flow characteristic curve gradually decreases with the increase of the flow, and the corresponding power-flow characteristic curve of the centrifugal blower increases with the increase of the flow. When the fan is operated at a constant speed, the operating point of the fan will move along the pressure-flow characteristic curve. The operating point of the fan during operation not only depends on the performance of the fan, but also depends on the characteristics of the system, and when the resistance of the pipe network is increased, the performance curve of the pipeline becomes steep. The basic principle of fan regulation is to obtain the required working condition by changing the performance curve of the fan or the characteristic curve of an external pipe network.

The traditional binary flow sintering fan for the sintering plant consists of a driving motor, a hydraulic coupler and the binary flow sintering fan, a binary flow impeller cannot be randomly controlled due to the shape of blades, and the inevitable incidence angle of an inlet of a blade working chamber easily causes uneven load distribution on the surface of the blades, so that a large speed gradient exists in an impeller flow channel, and a large flow loss is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a centrifugal blower.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a centrifugal blower, includes spiral case, rotor and casing, drive arrangement, the both sides of spiral case are all installed the casing, the air outlet of casing is connected with the current collector, the current collector is located the inside of spiral case, the rotor includes three-dimensional flow impeller and pivot, three-dimensional flow impeller installs in the pivot, just three-dimensional flow impeller is located inside the current collector, the pivot both ends are passed the casing, just the pivot passes through the bearing frame and supports, drive arrangement is located the outside of casing, just drive arrangement with the power input end of pivot is connected.

A further technical scheme is that the three-dimensional flow impeller comprises a shaft sleeve, a middle disc, three-dimensional flow blades, a cover disc and a fluid director, the shaft sleeve is sleeved on the rotating shaft, the shaft sleeve and the rotating shaft rotate synchronously, the middle disc is fixedly connected to the outer surface of the shaft sleeve, the three-dimensional flow blades are installed on two side walls of the middle disc, part of the three-dimensional flow blades are connected with the corresponding outer side wall of the shaft sleeve, the cover disc is further arranged at the outer end part of each three-dimensional flow blade, the cover disc and the middle disc form a containing cavity, the three-dimensional flow blades are located in the containing cavity, the fluid director is installed on two sides of the shaft sleeve, and the fluid director is sleeved on the rotating shaft.

According to a further technical scheme, the driving device is a variable frequency motor, a high-level oil tank is placed above the driving device, and the high-level oil tank is connected through an oil pipe to provide lubricating oil for a mandrel of the driving device and a rotating shaft of the rotor.

A further technical scheme is, the casing lateral wall is installed sealedly the axle head of pivot is sealed, the axle head is sealed to include the first sealed dish of a plurality of and the sealed dish of second, the first sealed dish sets up with the sealed dish of second crisscross each other, and is adjacent form the storage tank between the first sealed dish, be provided with sealed copper dish in the storage tank, just sealed copper dish suit is in the pivot, the first sealed dish and the sealed dish of second all offer the hole with pivot looks adaptation, the first sealed dish passes through the locking bolt with the sealed dish of second and installs on the casing.

The technical scheme is that the three-dimensional flow impeller further comprises an inlet ring, and the inlet ring is fixedly arranged on the three-dimensional flow blades on the shaft sleeve.

The technical scheme is that the shaft sleeve is fixedly connected with the rotating shaft.

A further technical scheme is that the clamping ring is installed to the one end of axle sleeve, the wheel drum is installed to the other end of axle sleeve, just the wheel drum the clamping ring with the axle sleeve passes through bolt assembly and stabilizes the connection, the wheel drum with pivot fixed connection.

The further technical scheme is that the inner parts of the casing and the volute are both connected with fixed rods.

According to a further technical scheme, an air outlet of the volute is connected with an air outlet pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a design into the surface load distribution of the three-dimensional flow blade that the zero attack angle was admitted air and is obtained with the three-dimensional flow blade often more even, the three-dimensional flow blade more is fit for fluidic three-dimensional motion law and has superior flow characteristic, consequently, can obtain better air current flow characteristic, energy loss when can reducing the fan operation, the two air inlets through the casing can show the air input that improves the fan and improve work efficiency, adopt the three-dimensional flow blade to make the fan drive overall efficiency improve 5~8% under the unchangeable condition of fan flow and pressure, make the noise reduce 2~3 dB.

2. The utility model discloses a first sealed dish and second sealed dish carry out the crisscross setting each other and first sealed dish and second sealed dish are installed on the casing through the locking bolt and can prevent that the air outflow in the casing from leading to the work efficiency of air-blower to descend, and the intensity of whole air-blower can be improved to the dead lever through casing and the inside fixed connection of spiral case, improves the stability of air-blower during operation.

Drawings

Fig. 1 is a schematic view of the overall structure of the blower of the present invention.

Fig. 2 is a schematic diagram of the internal components of the three-dimensional flow impeller of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.

In the figure, 1, a volute; 2. a housing; 3. a current collector; 4. a three-dimensional flow impeller; 5. a rotating shaft; 6. a fluid director; 7. fixing the rod; 8. an air outlet pipe; 9. a drive device; 10. a high-level oil tank; 11. an inlet ring; 12. a cover plate; 13. pressing a ring; 14. a shaft sleeve; 15. a three-dimensional flow blade; 16. a middle disc; 17. a wheel drum; 18. a first sealing disk; 19. a second sealing disk; 20. a containing groove; 21. and sealing the copper disc.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are conventionally placed in use, or the position or positional relationship which the skilled person conventionally understand, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific position, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

Example 1:

referring to the embodiment shown in fig. 1 and 3, a centrifugal blower includes a volute 1, a rotor, a casing 2, and a driving device 9, the casing 2 is installed on both sides of the volute 1, the volute 1 and the casing 2 are connected by welding, the casing 2 and the volute 1 are connected with a fixing rod 7, the strength of the blower as a whole can be increased significantly, and the stability of the blower during operation can be increased, an air outlet pipe 8 is connected to an air outlet of the volute 1, a shaft end seal of a sealing rotating shaft 5 is installed on the outer side wall of the casing 2, the shaft end seal includes a plurality of first sealing discs 18 and second sealing discs 19, the first sealing discs 18 and the second sealing discs 19 are arranged in a staggered manner, a containing groove 20 is formed between adjacent first sealing discs 18, a sealing copper disc 21 is arranged in the containing groove 20, the sealing copper disc 21 is sleeved on the rotating shaft 5, inner holes matched with the rotating shaft 5 are formed on the first sealing discs 18 and the second sealing discs 19, the first sealing disc 18 and the second sealing disc 19 are installed on the casing 2 through locking bolts, two ends of the casing 2 can be sealed through the mutually staggered arrangement between the first sealing disc 18 and the second sealing disc 19, the air in the casing 2 is placed to flow out to reduce the waste energy of the working efficiency of the blower, the air outlet of the casing 2 is connected with the current collector 3, the current collector 3 is located in the volute 1, the rotor comprises a three-dimensional flow impeller 4 and a rotating shaft 5, the three-dimensional flow impeller 4 is installed on the rotating shaft 5, the three-dimensional flow impeller 4 is located in the current collector 3, the three-dimensional flow impeller 4 comprises a shaft sleeve 14, a middle disc 16, three-dimensional flow blades 15, a cover disc 12 and a fluid director 6, the shaft sleeve 14 is sleeved on the rotating shaft 5, the shaft sleeve 14 and the rotating shaft 5 synchronously, the middle disc 16 is fixedly connected on the outer surface of the shaft sleeve 14, the three-dimensional flow blades 15 are installed on two side walls of the middle disc 16, and part of the three-dimensional flow blades 15 are connected with the outer side wall of the corresponding shaft sleeve 14, the outer end part of the three-dimensional flow blade 15 is also provided with a cover disc 12, the cover disc 12 and a middle disc 16 form an accommodating cavity, the three-dimensional flow blade 15 is positioned in the accommodating cavity, the shaft sleeve 14 and the rotating shaft 5 are fixed in an interference fit mode through keys, fluid directors 6 are arranged on both sides of the shaft sleeve 14, the fluid directors 6 are sleeved on the rotating shaft 5, the air from the two air inlets of the machine shell 2 is guided by the fluid director 6, unnecessary energy loss is reduced, the working efficiency is improved, two ends of the rotating shaft 5 penetrate through the machine shell 2, the rotating shaft 5 is supported by a bearing seat, the driving device 9 is positioned at the outer side of the machine shell 2, the driving device 9 is connected with the power input end of the rotating shaft 5, the connection mode is that the driving device 9 is connected with the rotating shaft 5 through the coupler, the driving device 9 is a variable frequency motor, the high-level oil tank 10 is placed above the driving device 9, and the high-level oil tank 10 is connected with the spindle of the driving device 9 and the rotating shaft 5 of the rotor through oil pipes to provide lubricating oil lubrication.

Example 2:

referring to the embodiment shown in fig. 1-2, a centrifugal blower includes a volute 1, a rotor, a casing 2, and a driving device 9, the casing 2 is installed on both sides of the volute 1, the volute 1 and the casing 2 are connected by welding, the casing 2 and the volute 1 are both connected with a fixing rod 7, the overall strength of the blower can be increased significantly, and the stability of the blower during operation can be increased, an air outlet pipe 8 is connected to an air outlet of the volute 1, a shaft end seal of a sealing rotating shaft 5 is installed on the outer side wall of the casing 2, the shaft end seal includes a plurality of first sealing discs 18 and second sealing discs 19, the first sealing discs 18 and the second sealing discs 19 are arranged in a staggered manner, a containing groove 20 is formed between adjacent first sealing discs 18, a sealing copper disc 21 is arranged in the containing groove 20, the sealing copper disc 21 is sleeved on the rotating shaft 5, inner holes adapted to the rotating shaft 5 are formed on the first sealing discs 18 and the second sealing discs 19, the first sealing disc 18 and the second sealing disc 19 are mounted on the casing 2 through locking bolts, two ends of the casing 2 can be sealed through the mutually staggered arrangement between the first sealing disc 18 and the second sealing disc 19, the air in the casing 2 is placed to flow out to reduce the energy waste of the working efficiency of the blower, the air outlet of the casing 2 is connected with the current collector 3, the current collector 3 is located in the volute 1, the rotor comprises a three-dimensional flow impeller 4 and a rotating shaft 5, the three-dimensional flow impeller 4 further comprises an inlet ring 11, the inlet ring 11 is fixedly mounted on three-dimensional flow blades 15 located on a shaft sleeve 14, the shaft sleeve 14 is fixedly connected with the rotating shaft 5, a middle disc 16 is fixedly connected on the outer surface of the shaft sleeve 14, the three-dimensional flow blades 15 are mounted on two side walls of the middle disc 16, part of the three-dimensional flow blades 15 are connected with the outer side wall of the corresponding shaft sleeve 14, a pressing ring 13 is mounted at one end of the shaft sleeve 14, and a wheel drum 17 is mounted at the other end of the shaft sleeve 14, and wheel drum 17, clamping ring 13 and axle sleeve 14 pass through bolt assembly firm connection, wheel drum 17 and 5 fixed connection of pivot, three-dimensional flow impeller 4 installs on pivot 5, and three-dimensional flow impeller 4 is located collector 3 inside, casing 2 is passed at 5 both ends of pivot, and pivot 5 passes through the bearing frame and supports, drive arrangement 9 is located the outside of casing 2, and drive arrangement 9 is connected with the power input end of pivot 5, its connected mode is for being connected drive arrangement 9 and pivot 5 through the shaft coupling, drive arrangement 9 is inverter motor, high-order oil tank 10 has been placed to drive arrangement 9 top, high-order oil tank 10 provides the lubricating oil through oil pipe connection for the dabber of drive arrangement 9 and pivot 5 of rotor and lubricates.

The working process of the utility model is as follows: when the blower works, firstly, the driving device 9 is started, the rotation of the driving device 9 drives the rotating shaft 5 to rotate through the coupler, the rotation of the rotating shaft 5 drives the three-dimensional flow impeller 4 to rotate so as to drive the three-dimensional flow blades 15 on the three-dimensional flow impeller to rotate, the rotation of the three-dimensional flow blades 15 enables air in a multi-curved-surface air channel formed by the three-dimensional flow blades to move at a high speed, flowing air is thrown out under the action of centrifugal force, the flow velocity of the air is increased, the kinetic energy of the air is converted into static pressure, the static pressure is converted into the kinetic energy of the air flowing along with the outflow of the air, the kinetic energy flows out through an air outlet pipe 8 connected with an air outlet of the casing 2, in the process, as the air in the casing 2 forms a certain negative pressure at the axial inlet of the impeller, the external air is immediately supplemented under the action of atmospheric pressure, and the air is continuously discharged and supplemented under the action of continuous rotation of the impeller, thereby achieving the purpose of continuous blowing.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A centrifugal blower comprising a volute (1), a rotor and a casing (2), a drive means (9), characterized in that: the spiral case is characterized in that the casing (2) is mounted on two sides of the spiral case (1), an air outlet of the casing (2) is connected with a current collector (3), the current collector (3) is located inside the spiral case (1), the rotor comprises a three-dimensional flow impeller (4) and a rotating shaft (5), the three-dimensional flow impeller (4) is mounted on the rotating shaft (5), the three-dimensional flow impeller (4) is located inside the current collector (3), two ends of the rotating shaft (5) penetrate through the casing (2), the rotating shaft (5) is supported through a bearing seat, the driving device (9) is located on the outer side of the casing (2), and the driving device (9) is connected with a power input end of the rotating shaft (5);

the outer side wall of the casing (2) is provided with a seal, the shaft end of the rotating shaft (5) is sealed, the shaft end seal comprises a plurality of first sealing discs (18) and second sealing discs (19), the first sealing discs (18) and the second sealing discs (19) are arranged in a staggered mode, and are adjacent to each other, a containing groove (20) is formed between the first sealing discs (18), a sealing copper disc (21) is arranged in the containing groove (20), the sealing copper disc (21) is sleeved on the rotating shaft (5), inner holes matched with the rotating shaft (5) are formed in the first sealing discs (18) and the second sealing discs (19), and the first sealing discs (18) and the second sealing discs (19) are installed on the casing (2) through locking bolts;

the inner parts of the casing (2) and the volute (1) are both connected with a fixing rod (7).

2. A centrifugal blower according to claim 1, wherein: the three-dimensional flow impeller (4) comprises a shaft sleeve (14), a middle disc (16), three-dimensional flow blades (15), a cover disc (12) and a fluid director (6), the shaft sleeve (14) is sleeved on the rotating shaft (5), the shaft sleeve (14) and the rotating shaft (5) rotate synchronously, the middle disc (16) is fixedly connected with the outer surface of the shaft sleeve (14), the two side walls of the middle disc (16) are both provided with the three-dimensional flow blades (15), and part of the three-dimensional flow blades (15) are connected with the outer side wall of the corresponding shaft sleeve (14), the outer end part of the three-dimensional flow blade (15) is also provided with a cover disc (12), the cover disc (12) and the middle disc (16) form an accommodating cavity, the three-dimensional flow blades (15) are located in the containing cavity, fluid deflectors (6) are mounted on two sides of the shaft sleeve (14), and the fluid deflectors (6) are sleeved on the rotating shaft (5).

3. A centrifugal blower according to claim 1, wherein: the driving device (9) is a variable frequency motor, a high-level oil tank (10) is placed above the driving device (9), and the high-level oil tank (10) is connected through an oil pipe to provide lubricating oil for a mandrel of the driving device (9) and a rotating shaft (5) of a rotor.

4. A centrifugal blower according to claim 2, wherein: the three-dimensional flow impeller (4) further comprises an inlet ring (11), and the inlet ring (11) is fixedly installed on three-dimensional flow blades (15) located on the shaft sleeve (14).

5. A centrifugal blower according to claim 4, wherein: the shaft sleeve (14) is fixedly connected with the rotating shaft (5).

6. A centrifugal blower according to claim 4, wherein: clamping ring (13) is installed to the one end of axle sleeve (14), wheel drum (17) is installed to the other end of axle sleeve (14), just wheel drum (17) clamping ring (13) with axle sleeve (14) are through bolt assembly firm connection, wheel drum (17) with pivot (5) fixed connection.

7. A centrifugal blower according to claim 1, wherein: an air outlet pipe (8) is connected with an air outlet of the volute (1).