阅读说明：本技术 一种基于负压截断的涡环激励器 (Vortex ring exciter based on negative pressure truncation ) 是由 徐琳 侯宝珅 戴训 田昊宇 程晓渊 弋戈 马辰阳 吴杭 于 2020-06-18 设计创作，主要内容包括：本发明公开了一种基于负压截断的涡环激励器,包括送风装置、负压截断装置、减缩装置和通风管道；所述通风管道主体为圆柱状；所述送风装置和减缩装置设置于通风管道的两端；所述通风管道管壁一侧设有开口或两侧对称设置有开口；所述负压截断装置设置在通风管道的开口处；所述负压截断装置在通风管道开口处产生负压,将通风管道内的气流截断,被截断的气流在减缩装置的作用下卷曲产生涡环。本发明所公开的一种基于负压截断的涡环激励器,通过负压来代替机械部件实现截断功能,在截断的同时通过负压将截断瞬间的气体导出,不会产生多余堵塞的气体,降低流体能量损耗。(The invention discloses a vortex ring exciter based on negative pressure truncation, which comprises an air supply device, a negative pressure truncation device, a reduction device and a ventilation pipeline, wherein the negative pressure truncation device is arranged on the air supply device; the main body of the ventilation pipeline is cylindrical; the air supply device and the reduction device are arranged at two ends of the ventilating duct; one side of the pipe wall of the ventilating pipeline is provided with an opening or the two sides of the pipe wall of the ventilating pipeline are symmetrically provided with openings; the negative pressure cut-off device is arranged at an opening of the ventilation pipeline; the negative pressure cut-off device generates negative pressure at the opening of the ventilation pipeline to cut off airflow in the ventilation pipeline, and the cut-off airflow curls under the action of the reduction device to generate a vortex ring. According to the vortex ring exciter based on negative pressure truncation disclosed by the invention, the negative pressure replaces mechanical parts to realize the truncation function, and gas at the truncation moment is led out through the negative pressure while truncation is carried out, so that redundant blocked gas cannot be generated, and the energy loss of fluid is reduced.)

1. The vortex ring exciter based on negative pressure cutoff is characterized by comprising an air supply device, a negative pressure cutoff device, a reduction device and a ventilation pipeline (5); the air supply device and the reduction device are arranged at two ends of the ventilating duct (5); the negative pressure cut-off device is arranged at an opening at one side of the ventilation pipeline (5); the negative pressure cut-off device generates negative pressure at the opening of the ventilation pipeline (5), cuts off airflow in the ventilation pipeline (5), and the cut-off airflow curls under the action of the reducing device to generate a vortex ring.

2. The vortex ring exciter based on negative pressure cutoff of claim 1, characterized in that the negative pressure cutoff device comprises a negative pressure through pipe (6), a negative pressure push rod (3) and a push plate power unit; the air inlet of the negative pressure through pipe (6) is connected with the side opening of the ventilating pipe (5); a negative pressure switch is arranged between the air inlet of the negative pressure through pipe (6) and the side opening of the ventilating pipe (5); the negative pressure push rod (3) is arranged inside the negative pressure through pipe (6); the negative pressure push rod (3) is connected with a push plate power unit; the bottom of the negative pressure push rod (3) is provided with a one-way valve (14); the valve port of the one-way valve (14) is opened under positive pressure in the negative pressure through pipe (6), and is closed under negative pressure; the push plate power unit drives the negative pressure push rod (3) to move towards the air outlet of the negative pressure through pipe (6) to generate negative pressure, and airflow in the ventilation pipe (5) is cut off and pumped into the negative pressure through pipe (6).

3. The negative pressure cutoff-based vortex ring exciter according to claim 2, characterized in that the push plate power unit comprises an eccentric motor (13), an eccentric (1) and a negative pressure push rod motion bracket (2); a wheel disc of the eccentric wheel (1) is provided with a sliding rod; a sliding rod moving track is arranged on the negative pressure push rod moving bracket (2); the sliding rod is arranged in the sliding rod moving track and can move back and forth along the sliding rod moving track; the eccentric wheel motor (13) is connected with the eccentric wheel (1), the negative pressure push rod moving support (2) is connected with the negative pressure push rod (3), the eccentric wheel motor (13) drives the eccentric wheel (1) to rotate, and the negative pressure push rod (3) is driven to move back and forth along the negative pressure through pipe (6) through the negative pressure push rod moving support (2).

4. The negative pressure cutoff-based vortex ring exciter according to claim 3, characterized in that an eccentric wheel fixing bracket (7) is arranged on the ventilation duct (5); the eccentric wheel (1) is fixedly connected with the ventilation pipeline (5) through an eccentric wheel fixing support (7).

5. The negative pressure cutoff-based vortex ring actuator according to claim 2, wherein the negative pressure switch comprises a rotating ring (8), a negative pressure switch motor (9) and a transmission member; the rotating ring (8) is attached to the opening at the side edge of the ventilating duct (5); the rotating ring (8) is provided with an opening matched with the air inlet of the negative pressure through pipe (6); the negative pressure switch motor (9) is connected with the rotating ring (8) through a transmission piece to drive the rotating ring (8) to rotate, so that the air inlet of the negative pressure through pipe (6) is communicated with or closed to the side opening of the ventilating pipe (5).

6. The negative pressure cutoff-based vortex ring exciter according to claim 5, characterized in that the transmission is composed of a spur gear (10) and an internal gear (11); the cylindrical gear (10) is connected with an output shaft of the negative pressure switch motor (9); the internal gear (11) is fixedly arranged on the rotating ring (8); the cylindrical gear (10) is meshed with the internal gear (11).

7. The negative pressure cutoff-based vortex ring exciter of claim 1, wherein the air supply device is an axial fan (12).

8. The negative pressure cutoff-based vortex ring exciter according to claim 1, characterized in that the reducing means is a flow directing nozzle (4); the air outlet caliber of the flow guide nozzle (4) is smaller than that of the ventilation pipeline (5).

9. The negative pressure cutoff-based vortex ring exciter according to claim 3, characterized in that the ventilation duct (5) is symmetrically opened on both sides; negative pressure siphunculus (6) are two, and the symmetrical arrangement all is provided with a negative pressure push rod (3) in ventilation pipe (5) both sides opening part in every negative pressure siphunculus (6), and two negative pressure push rods (3) are connected with the both ends of negative pressure push rod motion support (2) respectively.

Technical Field

The invention relates to the technical field of fluid mechanics, in particular to a vortex ring exciter based on negative pressure truncation.

Background

The existing vortex ring generating device accelerates airflow through a fan, usually cuts off the airflow through a mechanical device arranged inside a pipeline, so that a pulse vortex ring is realized, but because the fan is always in a rotating state, redundant gas can be generated by cutting off at every time, and a rear flow channel is blocked.

Disclosure of Invention

The invention aims to solve the technical problem that in order to overcome the defects in the prior art, the invention provides the vortex ring exciter based on negative pressure cutoff, which can lead out gas at the moment of cutoff while cutoff is carried out, does not generate redundant blocked gas and reduces the energy loss of fluid.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a vortex ring exciter based on negative pressure cutoff comprises an air supply device, a negative pressure cutoff device, a reduction device and a ventilating duct; the main body of the ventilation pipeline is cylindrical; the air supply device and the reduction device are arranged at two ends of the ventilating duct; one side of the pipe wall of the ventilating pipeline is provided with an opening or the two sides of the pipe wall of the ventilating pipeline are symmetrically provided with openings; the negative pressure cut-off device is arranged at an opening of the ventilation pipeline; the negative pressure cut-off device generates negative pressure at the opening of the ventilation pipeline to cut off airflow in the ventilation pipeline, and the cut-off airflow curls under the action of the reduction device to generate a vortex ring.

According to the technical scheme, the negative pressure cut-off device comprises a negative pressure through pipe, a negative pressure push rod and a push plate power unit; the air inlet of the negative pressure through pipe is connected with the side opening of the ventilating pipe; a negative pressure switch is arranged between the air inlet of the negative pressure through pipe and the side opening of the ventilating duct; the negative pressure push rod is arranged inside the negative pressure through pipe; the negative pressure push rod is connected with a push plate power unit; the bottom of the negative pressure push rod is provided with a one-way valve; the valve port of the one-way valve is opened under positive pressure in the negative pressure through pipe, and is closed under negative pressure; when the negative pressure push rod moves upwards, the one-way valve is closed, negative pressure is accumulated in the negative pressure through pipe, and when the negative pressure push rod moves downwards, compressed gas generates positive pressure, so that the one-way valve is opened to release the gas. The push plate power unit drives the negative pressure push rod to move towards the air outlet of the negative pressure through pipe to generate negative pressure, and the air flow in the ventilation pipe is cut off and pumped into the negative pressure through pipe.

According to the technical scheme, the push plate power unit comprises an eccentric wheel motor, an eccentric wheel and a negative pressure push rod motion bracket; a wheel disc of the eccentric wheel is provided with a sliding rod; a sliding rod moving track is arranged on the negative pressure push rod moving bracket; the sliding rod is arranged in the sliding rod movement track and can move back and forth along the sliding rod movement track, the eccentric wheel motor is connected with the eccentric wheel, the negative pressure push rod movement support is connected with the negative pressure push rod, the eccentric wheel motor drives the eccentric wheel to rotate, and the negative pressure push rod is driven to move back and forth along the negative pressure through pipe through the negative pressure push rod movement support.

According to the technical scheme, the negative pressure switch comprises a rotating ring, a negative pressure switch motor and a transmission part; the rotating ring is attached to an opening at the side edge of the ventilating duct; the outer diameter of the rotating ring is the same as the inner diameter of the ventilating duct, and the rotating ring and the ventilating duct are on the same axis; the rotating ring is provided with an opening matched with the air inlet of the negative pressure through pipe; the negative pressure switch motor is connected with the rotating ring through a transmission piece and drives the rotating ring to rotate, so that the air inlet of the negative pressure through pipe is communicated with or closed to the side opening of the ventilating pipe.

According to the technical scheme, the transmission part consists of a cylindrical gear and an internal gear; the cylindrical gear is connected with an output shaft of the negative pressure switch motor; the inner gear is fixedly arranged on the rotating ring; the cylindrical gear is meshed with the internal gear.

According to the technical scheme, the air supply device is an axial flow fan.

According to the technical scheme, an eccentric wheel fixing bracket is arranged on the ventilating duct; the center of the eccentric wheel is fixedly connected with the ventilating duct through an eccentric wheel fixing support.

According to the technical scheme, the reducing device is a flow guide nozzle; the outer diameter of the air outlet of the ventilating duct is equal to the inner diameter of the air inlet of the flow guide nozzle, and the air outlet of the ventilating duct and the air inlet of the flow guide nozzle are connected in a nested manner; the air outlet aperture of the flow guide nozzle is smaller than that of the ventilation pipeline.

According to the technical scheme, the two sides of the ventilating duct are symmetrically provided with openings; the negative pressure siphunculus is two, and the symmetrical arrangement all is provided with a negative pressure push rod in air pipe both sides opening part in every negative pressure siphunculus, and two negative pressure push rods are connected with the both ends of negative pressure push rod motion support respectively.

The invention has the following beneficial effects:

according to the vortex ring exciter based on negative pressure truncation disclosed by the invention, the negative pressure replaces mechanical parts to realize the truncation function, and gas at the truncation moment is led out through the negative pressure while truncation is carried out, so that redundant blocked gas cannot be generated, and the energy loss of fluid is reduced.

Drawings

FIG. 1 is an exploded view of a vortex ring actuator based on negative pressure cutoff in an embodiment of the present invention;

FIG. 2 is a perspective view of a vortex ring actuator based on negative pressure truncation in an embodiment of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a perspective view of a negative pressure switch in an embodiment of the present invention;

FIG. 6 is a perspective view of a negative pressure push rod in an embodiment of the present invention;

in the figure, an eccentric wheel-1, a negative pressure push rod moving bracket-2, a negative pressure push rod-3, a flow guide nozzle-4, a ventilating duct-5, a negative pressure through duct-6, an eccentric wheel fixing bracket-7, a rotating ring-8, a negative pressure switch motor-9, a cylindrical gear-10, an internal gear-11, an axial flow fan-12, an eccentric wheel motor-13 and a one-way valve-14.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 6, the vortex ring exciter based on negative pressure cutoff in one embodiment of the present invention includes an air supply device, a negative pressure cutoff device, a reduction device, and a ventilation duct 5; the air supply device and the reduction device are arranged at two ends of the ventilating duct 5; openings are symmetrically arranged on two sides of the pipe wall of the ventilating pipe 5; the negative pressure cut-off device is arranged at the opening of the ventilation pipeline 5; the negative pressure cut-off device generates negative pressure at the opening of the ventilation pipeline 5 to cut off the airflow in the ventilation pipeline 5, and the cut-off airflow curls under the action of the reducing device to generate a vortex ring.

Further, the negative pressure cut-off device comprises a negative pressure through pipe 6, a negative pressure push rod 3 and a push plate power unit; the air inlet of the negative pressure through pipe 6 is connected with the side opening of the ventilation pipe 5; a negative pressure switch is arranged between the air inlet of the negative pressure through pipe 6 and the side opening of the ventilating pipe 5; the negative pressure push rod 3 is arranged inside the negative pressure through pipe 6; the negative pressure push rod 3 is connected with a push plate power unit; the bottom of the negative pressure push rod 3 is provided with a one-way valve 14; the valve port of the one-way valve 14 is opened under positive pressure in the negative pressure through pipe 6, and is closed under negative pressure; the push plate power unit drives the negative pressure push rod 3 to move towards the air outlet of the negative pressure through pipe 6 to generate negative pressure, and the airflow in the ventilation pipeline 5 is cut off and pumped into the negative pressure through pipe 6.

Further, the push plate power unit comprises an eccentric wheel motor 13, an eccentric wheel 1 and a negative pressure push rod motion bracket 2; a wheel disc of the eccentric wheel 1 is provided with a sliding rod; a sliding rod moving track is arranged on the negative pressure push rod moving bracket 2; the sliding rod is arranged in the sliding rod movement track and can move back and forth along the sliding rod movement track, the eccentric wheel motor 13 is connected with the eccentric wheel 1, the negative pressure push rod movement support 2 is connected with the negative pressure push rod 3, the eccentric wheel motor 13 drives the eccentric wheel 1 to rotate, and the negative pressure push rod 3 is driven to move back and forth along the negative pressure through pipe 6 through the negative pressure push rod movement support 2.

Further, the negative pressure switch comprises a rotating ring 8, a negative pressure switch motor 9 and a transmission part; the rotating ring 8 is attached to the opening at the side edge of the ventilating duct 5; the outer diameter of the rotating ring 8 is the same as the inner diameter of the ventilating duct 5, and the rotating ring and the ventilating duct are on the same axis; the rotating ring 8 is provided with an opening matched with the air inlet of the negative pressure through pipe 6; the negative pressure switch motor 9 is connected with the rotating ring 8 through a transmission piece to drive the rotating ring 8 to rotate, so that the air inlet of the negative pressure through pipe 6 is communicated with or closed off the side opening of the ventilating pipe 5; when the rotating ring 8 rotates to the opening to be communicated with the air inlet of the negative pressure through pipe 6, the negative pressure through pipe 6 is communicated with the ventilation pipeline 5, and when the rotating ring 8 rotates to the opening to be avoided from the air inlet of the negative pressure through pipe 6, the negative pressure through pipe 6 is closed and disconnected with the ventilation pipeline 5.

Further, the transmission member is composed of a cylindrical gear 10 and an internal gear 11; the cylindrical gear 10 is connected with an output shaft of the negative pressure switch motor 9; the internal gear 11 is fixedly arranged on the rotating ring 8; the spur gear 10 meshes with an internal gear 11.

Further, the air supply device is an axial flow fan 12.

Further, an eccentric wheel fixing bracket 7 is arranged on the ventilation pipeline 5; the center of the eccentric wheel 1 is fixedly connected with the ventilating duct 5 through an eccentric wheel fixing bracket 7.

Further, the reducing device is a flow guide nozzle 4; the outer diameter of the air outlet of the ventilating duct 5 is equal to the inner diameter of the air inlet of the flow guide nozzle 4, and the air outlet and the flow guide nozzle are connected in a nested manner; the air outlet aperture of the flow guide nozzle 4 is smaller than that of the ventilation pipeline 5.

Further, negative pressure siphunculus 6 is two, and the symmetrical arrangement all is provided with a negative pressure push rod 3 in every negative pressure siphunculus 6 in ventilation pipe 5 both sides opening part, and two negative pressure push rods 3 are connected with the both ends of negative pressure push rod motion support 2 respectively.

The working principle of the invention is as follows: air is pumped into the device through the axial flow fan 12, and airflow is generated in the ventilating duct 5; eccentric wheel motor 13 drives eccentric wheel 1 rotatory, negative pressure push rod motion support 2 turns into the linear motion of negative pressure push rod 3 with eccentric wheel 1's rotation, negative pressure push rod 3 is from negative pressure siphunculus 6 bottom upward movement, because the side opening of swivel becket 8 does not have the air intake UNICOM with negative pressure siphunculus 6, negative pressure siphunculus 6 is airtight structure this moment, generate the negative pressure in the cavity, next moment, drive down at negative pressure switch motor 9, the side opening and the negative pressure siphunculus 6 UNICOM of swivel becket 8, the negative pressure of gathering in the cavity cuts the air current in air pipe 5, within suction negative pressure siphunculus 6, realize the negative pressure and cut the air current, the air current of being cut off is because the shearing takes place to curl. At the next moment, the side opening of the rotating ring 8 is driven by the negative pressure switch motor 9 to separate from the air inlet of the negative pressure through pipe 6, the wall surface of the air supply pipeline 5 is closed again, at the moment, the negative pressure push rod 3 moves from the upper stop point to the lower stop point under the action of the eccentric wheel 1, and the negative pressure through pipe 6 is closed at the moment, so that positive pressure is generated in the movement process, and under the action of the positive pressure, the one-way valve 14 is opened, gas in the negative pressure through pipe 6 is discharged, and the initial position is. The pulse vortex ring is generated continuously in a motion period, and the pulse vortex ring generated by the generation mode can not generate redundant gas in the cutting process, so that the gas in the ventilation pipeline 5 can be effectively prevented from being blocked.

The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.