阅读说明：本技术 一种自激式热声发动机 (Self-excitation type thermoacoustic engine ) 是由 叶春 朱莹芳 于 2021-01-12 设计创作，主要内容包括：本发明公开了一种自激式热声发动机,旨在提供一种自激式热声发动机,其技术方案要点是：包括底板,底板一侧安装有表面设有连接孔的飞轮座,飞轮座的连接孔内设有轴承,轴承上连接有轴心,轴心两侧固定连接有第一飞轮、第二飞轮,第二飞轮一侧设有活塞配合管,活塞配合管远离第二飞轮一端设有活塞,活塞靠近活塞配合管一端设有活塞连接轴,活塞连接轴上铰接有联动轴,联动轴另一端与第二飞轮转动连接,活塞远离活塞配合管一端设有限制器,限制器表面套设有平口试管,限制器中心处通过上固定座、下固定座与底板连接。(The invention discloses a self-excited thermoacoustic engine, aiming at providing a self-excited thermoacoustic engine, which has the technical scheme key points that: including the bottom plate, the flywheel seat that the surface was equipped with the connecting hole is installed to bottom plate one side, be equipped with the bearing in the connecting hole of flywheel seat, be connected with the axle center on the bearing, the first flywheel of axle center both sides fixedly connected with, the second flywheel, second flywheel one side is equipped with piston cooperation pipe, piston cooperation pipe is kept away from second flywheel one end and is equipped with the piston, the piston is close to piston cooperation pipe one end and is equipped with the piston connecting axle, it has the universal driving shaft to articulate on the piston connecting axle, the universal driving shaft other end rotates with the second flywheel to be connected, piston cooperation pipe one end is kept away from to the piston is equipped with the limiter, limiter surface cover is equipped with the flat.)

1. A self-exciting thermoacoustic engine comprising a base plate (12), characterized in that: the utility model discloses a flywheel seat, including bottom plate (12), connecting hole, axle center (1), first flywheel (2) of axle center (1) both sides fixedly connected with, second flywheel (3), be equipped with bearing (M01) in the connecting hole of flywheel seat (4), be connected with axle center (1) on bearing (M01), second flywheel (3) one side is equipped with piston cooperation pipe (6), second flywheel (3) one end is kept away from in piston cooperation pipe (6) is equipped with piston (5), piston (5) are close to piston cooperation pipe (6) one end and are equipped with piston connecting axle (7), it has universal driving shaft (8) to articulate on piston connecting axle (7), the universal driving shaft (8) other end is rotated with second flywheel (3) and is connected, piston (5) are kept away from piston cooperation pipe (6) one end and are equipped with limiter (9), limiter (9) surface cover is equipped with plain-opening test tube (M03), the center of the limiter (9) is connected with the bottom plate (12) through an upper fixed seat (10) and a lower fixed seat (11).

2. A self-exciting thermoacoustic engine according to claim 1, wherein: the two ends of the first flywheel (2) and the second flywheel (3) are respectively connected through an M12 nut (S05) and a fixing screw (S03) in a locking mode.

3. A self-exciting thermoacoustic engine according to claim 1, wherein: the piston (5) connecting shaft (7) is connected with the linkage shaft (8) through a double-headed screw (S02) and an M5 nut (S04).

4. A self-exciting thermoacoustic engine according to claim 1, wherein: the surfaces of the two ends of the limiter (9) are also sleeved with O-shaped rings (M02).

5. A self-exciting thermoacoustic engine according to claim 1, wherein: the bottom of the lower fixing seat (11) is fixedly connected with the bottom plate (12) through an inner hexagonal head screw (S01), and the top of the lower fixing seat (11) is connected with the upper fixing seat (10) through an inner hexagonal head screw (S01).

Technical Field

The invention relates to the field of industrial design, in particular to a self-excitation type thermoacoustic engine.

Background

Thermoacoustic engines are mainly divided into two types, namely traveling wave type and standing wave type. Although the traveling mode is considered to be of higher power, the structure is more complex than the standing mode, and most traveling mode thermoacoustic engines mainly use a dc carrier at the load end, which is not only more difficult to adjust the operating point of oscillation, but also less reliable in efficiency due to the poor adjustment of the stroke of the carrier at the load end. The standing wave type is considered to have low power because most of the power generation loads used in the standing wave type are piezoelectric carriers, so that the power effect of the standing wave type can only be half of that of the traveling wave type, and the standing wave type has the defect of being too sensitive and easily influenced by the ambient temperature.

Disclosure of Invention

The invention aims to provide a self-excitation type thermoacoustic engine which has the advantages of high working efficiency and cyclic utilization.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a self-excitation formula heat sound engine, includes the bottom plate, the flywheel seat that the surface was equipped with the connecting hole is installed to bottom plate one side, be equipped with the bearing in the connecting hole of flywheel seat, be connected with the axle center on the bearing, axle center both sides fixedly connected with first flywheel, second flywheel one side is equipped with piston cooperation pipe, piston cooperation pipe is kept away from second flywheel one end and is equipped with the piston, the piston is close to piston cooperation pipe one end and is equipped with the piston connecting axle, it has the universal driving shaft to articulate on the piston connecting axle, the universal driving shaft other end is rotated with the second flywheel and is connected, piston cooperation pipe one end is kept away from to the piston is equipped with the limiter, limiter surface cover is equipped with flat mouthful test tube, limiter center department is connected with.

Through adopting above-mentioned technical scheme, through carrying out the heating of continuation to the plain-nose test tube, internal energy turns into the vibration energy to through the piston reciprocating motion in the piston cooperation pipe, drive the first flywheel of one end articulated, the quick rotation of second flywheel.

Further setting: and the two ends of the first flywheel and the second flywheel are respectively connected through an M12 nut and a fixing screw in a locking manner.

By adopting the technical scheme, the first flywheel and the second flywheel are fixed in a nut locking mode, so that the inertia of the flywheels can be changed and experiments can be carried out.

Further setting: the piston connecting shaft is connected with the linkage shaft through a double-headed screw and an M5 nut.

By adopting the technical scheme, after the piston connecting shaft and the linkage shaft are locked together by using the double-headed screw, M5 nuts are locked on two sides of the double-headed screw so as to prevent the linkage shaft from sliding off.

Further setting: the surfaces of the two ends of the limiter are also sleeved with O-shaped rings.

By adopting the technical scheme, the limiter has the functions that the O-shaped rings are sleeved at the two ends respectively, then the test tube for heating and the piston matching tube are arranged on the limiter, the integral air tightness of the self-excitation type thermoacoustic engine is kept, the loss of air compressibility is ensured, and finally the limiter is connected with the upper fixing seat and the lower fixing seat and is locked.

Further setting: the bottom of the lower fixing seat is fixedly connected with the bottom plate through the inner hexagonal head screw, and the top of the lower fixing seat is connected with the upper fixing seat through the inner hexagonal head screw.

By adopting the technical scheme, the upper fixing seat and the lower fixing seat are locked together, and the limiter is fixed between the upper fixing seat and the lower fixing seat, so that the height of the limiter when the two fixing seats are designed needs to be smaller than the height of the fixed part of the limiter in order to avoid the limiter from shaking when the self-excited thermoacoustic engine works.

In conclusion, the invention has the following beneficial effects: the self-excited thermoacoustic engine is constructed by connecting an air tube with porous material inside to a load end, mainly by heating the porous material inside and converting internal energy in the air into vibrational energy by triggering the load end.

Drawings

FIG. 1 is a schematic view of the overall structure of a self-excited thermoacoustic engine;

FIG. 2 is an exploded view of a self-excited thermoacoustic engine;

FIG. 3 is an overall schematic view of a self-excited thermoacoustic engine limiter;

FIG. 4 is a schematic diagram of the operation of the self-excited thermoacoustic engine module;

fig. 5 is a schematic view of a mating tube structure.

In the figure, 1, axis; 2. a first flywheel; 3. a second flywheel; 4. a flywheel seat; 5. a piston; 6. a piston fitting tube; 7. a piston connecting shaft; 8. a linkage shaft; 9. a limiter; 10. an upper fixed seat; 11. a lower fixed seat; 12. a base plate; m01, bearings; m02, O-ring; m03, plain test tube; s01, inner hexagonal head screws; s02, a double-headed screw; s03, fixing screws; s04, M5 nut; s06 and M12 nuts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A self-excitation type thermoacoustic engine is shown in figures 1, 2 and 3 and comprises a bottom plate 12, a flywheel seat 4 with a connecting hole on the surface is installed on one side of the bottom plate 12, a bearing M01 is arranged in the connecting hole of the flywheel seat 4, an axle center 1 is connected to the bearing M01, a first flywheel 2 and a second flywheel 3 are fixedly connected to two sides of the axle center 1, and two ends of the first flywheel 2 and the second flywheel 3 respectively pass through M12 screw caps. S06M12S04M5 and a fixing screw S03 are connected in a locking mode.

As shown in fig. 1, 2 and 3, a piston 5 matching pipe is arranged on one side of the second flywheel 3, a piston 5 is arranged at one end, far away from the second flywheel 3, of the piston 5 matching pipe, a piston 5 connecting shaft is arranged at one end, close to the piston 5 matching pipe, of the piston 5, a linkage shaft 8 is hinged to the piston 5 connecting shaft, and the piston 5 connecting shaft is connected with the linkage shaft 8 through double-headed screws S02 and M5. The other end of the universal driving shaft 8 is rotatably connected with the second flywheel 3, the piston 5 is far away from one end of the piston 5 matching pipe and is provided with a limiter 9, a plain test tube M03 is sleeved on the surface of the limiter 9, the center of the limiter 9 is connected with the bottom plate 12 through an upper fixing seat 10 and a lower fixing seat 11, and O-shaped rings M02O are further sleeved on the surfaces of two ends of the limiter 9.

As shown in fig. 2, the bottom of the lower fixing seat 11 is connected and fixed with the bottom plate 12 by a hexagon socket head screw S01, and the top of the lower fixing seat 11 is connected with the upper fixing seat 10 by a hexagon socket head screw S01.

The main working principle is as follows: through carrying out the heating of continuation to plain-end test tube M03, internal energy converts into vibration energy to piston 5 reciprocating motion in the cooperation pipe through piston 5 drives the first flywheel 2 of one end articulated, second flywheel 3 and rotates fast.

In the platform design of the self-excited thermoacoustic engine, the design consideration of the first flywheel 2 is mainly the frequency response of the whole self-excited thermoacoustic engine, so that the flywheel inertia which is relatively required is manufactured, and the lower the frequency of the load part is relatively caused by matching the thermoacoustic engine with the longer total length, so that the load with the larger inertia is required, namely, the self-excited thermoacoustic engine can normally work by driving the inertia of the flywheel; in the design process of the second flywheel 3, in order to facilitate adjustment and test of the stroke length of the piston 5, a plurality of holes are drilled on the second flywheel 3 for facilitating experiments, and when the second flywheel 3 is assembled with the axle center 1 in a matching manner, the locking distance of the second flywheel 3 must be consistent with the locking distance of the axle center 1 in order to avoid collision between the flywheel and the universal driving shaft 8 during rotation; the flywheel seat 4 is designed by confirming the central position of the axis 1, and the height of the central position of the axis 1 is required to be the same as that of the central position of the piston 5, so that unnecessary resistance can be reduced in the moving process of the piston 5, and finally, after the flywheel seat is matched with the axis 1, a bearing M01 and the like, the stability and the smoothness of the whole flywheel seat 4 are tested by rotating the flywheel; in order to keep good air tightness of the self-excited thermoacoustic engine during working and avoid the loss of the compressibility of the piston 5 to gas in the moving process, the piston matching pipe 6 is processed while the piston 5 is processed, and the optimal matching degree is achieved by referring to the data of related tolerance matching; when the piston matching pipe 6 is designed, the air gap degree and the smoothness degree of the piston 5 moving in the pipe are considered, and the pipe length required by the piston 5 in different moving strokes is also considered, so that the problems that the piston 5 collides with other workpieces or slides out and the like cannot occur in the moving process; the piston connecting shaft 7 is mainly a connecting piece of the piston 5 and the linkage shaft 8, and in order to freely swing up and down with the linkage shaft 8 and reduce the shaking of the piston 5 during moving, the connecting part between the piston connecting shaft and the linkage shaft must be matched to a certain extent during design so as to avoid the collision of the self-excited thermoacoustic engine during working; the linkage shaft 8 is a connecting piece which connects the piston 5 with the second flywheel 3 and drives the piston 5 through the rotation of the flywheel, so that a certain matching degree and clearance are required to be kept at a locking point between the piston connecting shaft 7 and the flywheel, and the transmission loss caused by shaking or overlarge contact area of the locking point in the working process of the self-excited thermoacoustic engine can be avoided; the limiter 9 has the functions that the two ends are respectively sleeved with an O-ring M02, a test tube for heating and a piston matching tube 6 are arranged on the limiter 9, the integral air tightness of the self-excitation type thermoacoustic engine is kept, the loss of air compressibility is ensured, and finally, an upper fixing seat 10 and a lower fixing seat 11 are connected and the limiter 9 is locked; the upper fixing seat 10 is locked with the lower fixing seat 11, the limiter 9 is fixed between the upper fixing seat and the lower fixing seat, in order to avoid the limiter 9 from shaking when the self-excited thermoacoustic engine works, the height when the two fixing seats are designed needs to be smaller than the height of the fixed position of the limiter 9, the design of the bottom plate 12 needs to consider the drilling distance between the load part and the lower fixing seat 11, in addition, the thickness of the bottom plate 12 can also influence the working condition of the self-excited thermoacoustic engine, if the thickness is not a certain thickness, the parts can seriously shake, and even the self-excited thermoacoustic engine can not normally work.

The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.