TWI551789B - Fluid damper - Google Patents

Description

Flow damper

The present invention relates to a damper, and more particularly to a flow damper.

Earthquakes are an unavoidable natural phenomenon. For the residents in the earthquake zone, the earthquake is like an untimely bomb, threatening people's property and life.

The disasters caused by general earthquakes are mostly caused by the damage caused by the excessive shaking of civil engineering structures, such as house dumping, bridge breaks and road collapses. Therefore, if the vibrations of civil engineering structures are effectively absorbed, it will help to reduce The property damage and casualties caused by the earthquake have led to the development of a flow damper for shock absorption of civil structures.

1 is a cross-sectional view of a liquid flow damper of the Japanese Patent No. M284702, which is shown as a structural body with a container tube 11 internally filled with a liquid 10 as shown in the figure. A piston 12 is disposed in the container barrel 11, and the end of the piston 12 is passed through one end of the container barrel 11. When the flow damper is used, the container tube 11 is fixed to the building structure (not shown). At one degree of freedom, the end of the piston 12 extending beyond the container barrel 11 is coupled to another degree of freedom of the building structure.

In the aforementioned conventional flow damper, the piston 12 is provided with a separately controllable activity The liquid passages 13 are unidirectionally flowed on both sides of the plug 12, and the flow passage 13 of the piston 12 is guided to the two sides of the piston 12 by the first-class passage holes 131, and a compression spring is disposed in the flow passage hole 131 thereof. The stiffening element 133 and a plug 132 are pushed up by the stiffening element 133 to close the flow passage hole 131, and the stiffening element 133 and the plug 132 are restrained in the flow by a limiting member 134 such as a nut. In the 13th.

However, the conventional flow damper described above has a pressure regulating valve disposed in the piston body and has only a general primary damping effect, so that the structure itself is likely to be deformed by force when subjected to an instantaneous high vibration force; In addition, the conventional flow damper does not have an effect on the temperature rise caused by the high amplitude, but the rise of the temperature tends to increase the internal pressure of the flow damper, thereby affecting the overall efficiency or service life.

Therefore, how to avoid various problems in the above-mentioned prior art has become a problem that is currently being solved.

In view of the above-mentioned deficiencies of the prior art, the present invention provides a flow damper comprising: a cylinder having a through hole and having two open ends at two ends of the through hole; a piston disposed in the cylinder The body penetrates through the through hole and has a surface opposite to the piston and a piston side surface connecting the surfaces of the two pistons, and the piston side surface is liquid-tightly connected to the hole wall of the through hole, and the piston can be opposite to the cylinder The piston through hole extends through the surface of the two pistons and includes: a middle hole; and two end holes respectively connected to the two sides of the middle hole, and the hole of the middle hole is smaller than the hole of the end hole; The blocking member is movably disposed in the through hole of the piston relative to the through hole of the piston, and includes: a middle block, the position of which corresponds to the middle hole; and the two end blocks, the positions of which correspond to the end holes, and are respectively connected to both sides of the middle block, and the outer diameter of the middle block is smaller than the end block Each of the end blocks has a sealing surface at the middle block, and the sealing surface is configured to liquid-tightly cover one end of the middle hole when the displacement of the blocking member relative to the piston through hole is maximum a first internal flow passage connecting the surfaces of the two pistons; two rod members respectively disposed on the surface of the two pistons of the piston; an elastic member disposed in the rod member; and a second internal flow passage formed in the The piston and the rod member respectively communicate with the middle portion hole and the elastic member; and the two cover bodies respectively cover the two open ends of the cylinder body, and each has a through hole, and the rod member is liquid The dense ground is disposed in the through hole and is movable relative to the cover.

It can be seen from the above that the damper of the present invention mainly adjusts the internal pressure of the damper by the arrangement of the piston through hole, the blocking member, the second internal flow passage and the elastic member to avoid the temperature rise due to the flow damper. Causes internal pressure to be too high.

10‧‧‧Liquid

11‧‧‧ container

12, 22‧‧‧ piston

13‧‧‧ flow path

131‧‧‧Rail hole

132‧‧ ‧ embolization

133‧‧‧ stiffening components

134‧‧‧Limited parts

21‧‧‧Cylinder

210‧‧‧through through hole

211‧‧‧Open end

22a‧‧‧ piston surface

22b‧‧‧ piston side surface

220‧‧‧Piston hole

220a‧‧‧ mid-section hole

220b‧‧‧End hole

23‧‧‧Blocks

23a‧‧‧mid block

23b‧‧‧End block

231‧‧‧ Covering surface

24‧‧‧First internal flow channel

25‧‧‧ rods

26‧‧‧Flexible parts

261‧‧ ‧ spring

262‧‧‧moving block

27‧‧‧Second internal flow channel

28‧‧‧ Cover

280‧‧‧through openings

29‧‧‧ check valve

291‧‧‧ Ontology

2910‧‧‧ body through hole

291a‧‧‧ first end

291b‧‧‧ second end

290‧‧‧ Groove

2900‧‧‧opening end

292‧‧ ‧ spring

293‧‧ ‧block

2930‧‧‧Block through hole

294‧‧‧ check valve flow path

30‧‧‧damping fluid

AA‧‧‧cross line

Figure 1 is a cross-sectional view of a liquid flow damper of the Taiwan Patent No. M284702; and Figures 2A to 2E are schematic views of a first embodiment of the flow damper of the present invention, wherein the second embodiment Figure 3 is a three-dimensional exploded view, Figure 2B is a cross-sectional view taken along line AA of Figure 2A, Figure 2C is a combination of Figure 2B, Figure 2D is a partial enlarged view of Figure 2C, and Figure 2E is internal a cross-sectional view of the one-way valve; Figure 3 is a second embodiment of the flow damper of the present invention A cross-sectional view; and a cross-sectional view of a different embodiment of the third embodiment of the flow damper of the present invention, as shown in Figures 4A and 4B.

The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure.

It is to be understood that the structure, the proportions, the size, and the like of the present invention are intended to be used in conjunction with the disclosure of the specification, and are not intended to limit the invention. The conditions are limited, so it is not technically meaningful. Any modification of the structure, change of the proportional relationship or adjustment of the size should remain in this book without affecting the effects and the objectives that can be achieved by the present invention. The technical content disclosed in the invention can be covered. At the same time, the terms "upper", "end", "internal", "liquid", "side", "oblique" and "one" as used in this manual are also for convenience of description. It is not intended to limit the scope of the invention, and the change or adjustment of the relative relationship is considered to be within the scope of the invention.

First embodiment

2A to 2E are schematic views of a first embodiment of the flow damper of the present invention, wherein FIG. 2A is a three-dimensional exploded view, and FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A. Fig. 2C is a combination view of Fig. 2B, Fig. 2D is a partial enlarged view of Fig. 2C, and Fig. 2E is a cross-sectional view of the check valve inside.

As shown in the figure, the flow damper of the present invention comprises a cylinder 21 having a through hole 210 and two open ends 211 at two ends of the through hole 210. The cylinder 21 is cylindrical. The through hole 210 is cylindrical; the piston 22 is disposed in the through hole 210 of the cylinder 21 and has a second piston surface 22a and a piston side surface 22b connecting the two piston surfaces 22a, and The piston side surface 22b is fluidly connected to the hole wall of the through hole 210, and the piston 22 is movable relative to the cylinder 21. The piston through hole 220 extends through the two piston surface 22a, and the piston through hole 220 includes a middle hole 220a; and two end holes 220b are respectively connected to the two sides of the middle hole 220a, and the hole diameter of the middle hole 220a is smaller than the hole diameter of the end hole 220b (as shown in FIG. 2D); 23, can be movably disposed in the piston through hole 220 relative to the piston through hole 220, and includes: a middle block 23a, the position is corresponding to the middle hole 220a; and the two end block 23b, the position is corresponding to The end holes 220b are respectively connected to two sides of the middle block 23a, and the outer diameter of the middle block 23a is smaller than the The outer diameter of the end block 23b, each of the end blocks 23b has a cover surface 231 connected to the middle block 23a, and the cover surface 231 is used to maximize the displacement of the blocking member 23 relative to the through hole 220. In this embodiment, the cover surface 231 is an outer diameter gradient slope, but the cover surface 231 can also be a vertical surface with a sudden change in outer diameter (not shown). In this case, the first inner flow passage 24 communicates with the two piston surfaces 22a; the two rod members 25 are respectively disposed on the two piston surfaces 22a of the piston 22, and the rod member 25 is cylindrical; the elastic member 26 Is disposed in the rod 25, the elastic member 26 is a pressure buffer; the second internal flow passage 27, as shown in FIG. 2B, is formed on the piston 22 and In the rod member 25, the two ends respectively communicate with the middle hole 220a and the elastic member 26; and the two cover bodies 28 respectively cover the two open ends 211 of the cylinder block 21, and each has a through hole 280. The rod member 25 is fluidly inserted through the through opening 280 and is movable relative to the cover body 28.

In this embodiment, the elastic member 26 includes a spring 261 and a moving block 262, and the two ends of the moving block 262 respectively correspond to one end of the spring 261 and communicate with the second internal flow path 27, the first internal flow path 24 It is a piston through hole penetrating the two piston surface 22a.

According to the above flow damper, a two-way check valve 29 is included, which is disposed in the piston 22 and communicates with the two piston surfaces 22a, and the two check valves 29 are disposed opposite to each other, wherein, as in the second As shown, the check valve 29 includes a body 291 having opposite first and second ends 291a, 291b, and a recess 290 formed in the first end 291a of the body 291; The 290 is disposed in the recess 290, and one end is connected to the bottom of the recess 290. The stopper 293 is disposed in the recess 290 and is connected to the other end of the spring 292. The stopper 293 is a metal ball or a metal plug; and a one-way valve flow path 294 is formed in the body 291, and two ends of the groove 290 respectively communicate with the side wall of the groove 290 and the opening end 2900 of the groove 290, the spring 292 is elastic The stop 293 is pushed such that it tends to abut and close the open end 2900.

The flow damper includes a damping fluid 30 which is filled between the cylinder 21 and the rod member 25, the piston through hole 220 and the second internal flow passage 27, and the damping fluid 30 is an oil. Or mineral oil.

Second embodiment

Referring to Figure 3, there is shown a cross-sectional view of a second embodiment of the flow damper of the present invention. The main difference between the first embodiment and the first embodiment is that the first internal flow path 24 of the embodiment is a through hole extending through the middle block 23a and the end block 23b, that is, the first internal flow path 24 is not The through holes formed independently are formed in combination with the blocking member 23. As for other related technical features, they are similar and will not be described again.

Third embodiment

Referring to Figures 4A and 4B, there are shown cross-sectional views of different aspects of a third embodiment of the flow damper of the present invention. The main difference between this embodiment and the first embodiment is that the first inner flow passage 24 of the present embodiment is not formed separately, but is formed in combination with the one-way valve 29. As for other related technical features, they are similar and will not be described again.

In the aspect of FIG. 4A, the first internal flow channel 24 is disposed in the body 291, and the two ends thereof communicate with the sidewall of the recess 290 and the first end 291a of the body 291, respectively.

In the aspect of FIG. 4B, the first internal flow passage 24 is formed by a stopper through hole 2930 extending through the stopper 293, the groove 290, and a body through hole 2910 connecting the groove 290 and the second end 291b. Composition.

The flow damper of the present invention is mainly applied to the shock absorption of civil engineering structures. Referring to FIG. 2C, when the flow damper is subjected to an external force such as an earthquake, the piston 22 and the rod 25 are pushed, for example, when The piston 22 is forced to move to the left relative to the cylinder 21, and after the damping fluid 30 on the left side of the piston 22 is compressed, the damping fluid 30 flows to the right through the first internal flow passage 24, and the foregoing process produces a primary damping. Primary damping of the coefficient effect.

In addition, when the operating speed or damping force of the flow damper is up to a certain degree, for example, when the piston 22 is subjected to an instantaneous large external force such that the moving speed reaches a certain level (for example, a speed of 20 mm/s), the check valve 29 will It will open because the pressure is too high, thereby generating a secondary damping effect with a secondary damping coefficient, so as to avoid the dampering of the damping fluid 30 due to the too high vibration speed, so that the damping force exceeds the load of the structure, thereby causing Destruction of the damper.

When the flow damper of the present invention is actuated, the blocking member 23 moves in the opposite direction of the moving direction of the piston 22, so that the sealing surface 231 covers one end of the middle hole 220a, thereby preventing the damping fluid 30. Flowing into the second internal flow passage 27; the piston through hole 220, the blocking member 23, the second internal flow passage 27 and the elastic member 26 of the present invention mainly constitute a pressure buffering mechanism, when the damper performs high amplitude or long time operation The temperature of the internal damping fluid 30 continues to rise, which in turn causes the volume of the damping fluid 30 to expand, causing the internal pressure of the cylinder 21 to become large, thereby starting the pressure buffering mechanism of the present invention to balance the internal pressure of the cylinder 21. Specifically, the elastic member 26 is compressed to cause the moving block 262 to be inwardly recessed, so that the damping fluid 30 expanded by the temperature rise can have an additional accommodation space to avoid the temperature rise of the damping fluid 30. The damper is subjected to an additional internal pressure, that is, the elastic member 26 has a pressure buffering effect.

It should be noted that, in order to facilitate assembly and fabrication, the piston through hole 220, the blocking member 23, the elastic member 26 and the check valve 29 of the flow damper of the present invention can be designed as a separate module as in the present embodiment. Component, but the invention Not limited to this.

In summary, compared with the prior art, the damper of the present invention can activate the effect of secondary damping when the external force speed is higher than a certain value, so as to alleviate the large external force of the moment; in addition, considering that the damper is in progress The high temperature or long time operation temperature rise phenomenon, the present invention adjusts the internal pressure of the damper by setting the pressure buffer mechanism to avoid the situation that the internal pressure is too high due to the temperature rise of the flow damper.

The above embodiments are intended to illustrate the principles of the invention and its effects, and are not intended to limit the invention. Any of the above-described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the appended claims.

21‧‧‧Cylinder

22‧‧‧Piston

25‧‧‧ rods

26‧‧‧Flexible parts

261‧‧ ‧ spring

262‧‧‧moving block

27‧‧‧Second internal flow channel

28‧‧‧ Cover

29‧‧‧ check valve

30‧‧‧damping fluid

Claims (17)

A flow damper comprising: a cylinder having a through hole and having two open ends at two ends of the through hole; and a piston disposed in the through hole of the cylinder to face the cylinder Ground movement, the piston has a second piston surface and a piston side surface connecting the two piston surfaces, and the piston side surface is liquid-tightly connected to the hole wall of the through hole; the piston through hole penetrates the two piston surface And comprising: a middle hole; and two end holes respectively connected to the two sides of the middle hole, and the hole of the middle hole is smaller than the hole of the end hole; the blocking member is movable relative to the through hole of the piston Provided in the through hole of the piston, and comprising: a middle block, the position is corresponding to the middle hole; and the two end blocks are corresponding to the end holes, and are respectively connected to two sides of the middle block, the middle section The outer diameter of the block is smaller than the outer diameter of the end block, and each end block has a cover surface at the middle block, and the cover surface is used for maximizing the displacement of the blocking member relative to the through hole Liquid-tightly covering one end of the middle hole; first inner Flow path-based communication with the second piston surface; two members, are provided based on the second piston surface of the piston; an elastic member disposed in the stem-based member; a second internal flow passage is formed in the piston and the rod member, and the two ends respectively communicate with the middle section hole and the elastic member; and the two cover bodies respectively cover the two open ends of the cylinder body, and each has a Throughout the opening, the rod is fluidly inserted through the through opening and movable relative to the cover. The flow damper of claim 1, wherein the elastic member comprises a spring and a moving block, and the two ends of the moving block respectively correspond to one end of the spring and communicate with the second internal flow path. The flow damper of claim 1, wherein the first internal flow passage is a piston through hole penetrating the surface of the two pistons. The flow damper of claim 1, wherein the first internal flow passage is a through hole extending through the middle block and the end block. The flow damper according to claim 1, wherein the two-way valve is disposed in the piston and communicates with the two piston surfaces, and the two check valves are disposed opposite to each other. The flow damper of claim 5, wherein the one-way valve comprises: a body having opposite first and second ends and a groove formed at the first end; spring , is disposed in the groove, and has one end connected to the bottom of the groove; a stopper is disposed in the groove and connected to the other end of the spring; The one-way valve flow path is formed in the body, and the two ends of the two sides respectively communicate with the side wall of the groove and the opening end of the groove, and the spring pushes the block with its elastic force, so that it tends to lean against And closing the opening end. The flow damper of claim 6, wherein the first internal flow channel is formed in the body, and two ends of the groove are respectively connected to a sidewall of the groove and a first end of the body. The flow damper of claim 6, wherein the first internal flow path is formed by a through hole penetrating the block, the groove, and the body connecting the groove and the second end The hole is composed. The flow damper of claim 6, wherein the stopper is a metal ball or a metal plug. The flow damper according to claim 1, further comprising a damping fluid filled between the cylinder and the rod, in the through hole of the piston and in the second internal flow passage. The flow damper of claim 10, wherein the damping fluid is eucalyptus oil or mineral oil. The flow damper of claim 1, wherein the cylinder system has a cylindrical shape. The flow damper of claim 1, wherein the through hole is cylindrical. The flow damper of claim 1, wherein the rod is cylindrical. The flow damper of claim 1, wherein the elastic member is a pressure damper. The flow damper of claim 1, wherein the flow damper is applied to shock absorption of a civil building structure. The flow damper of claim 1, wherein the cover surface is an outer diameter gradient bevel or an outer diameter abrupt vertical surface.