CN114909427A

CN114909427A - Monomer capsule membrane type molecular spring vibration isolator and assembling method

Info

Publication number: CN114909427A
Application number: CN202210434367.9A
Authority: CN
Inventors: 唐宇航; 缪旭弘; 王雪仁; 张艳涛; 杨佩; 管峰; 滕汉东; 金阳
Original assignee: People's Liberation Army 92578; Nanjing University of Aeronautics and Astronautics
Current assignee: People's Liberation Army 92578; Nanjing University of Aeronautics and Astronautics
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-08-16
Anticipated expiration: 2042-04-24
Also published as: CN114909427B

Abstract

The invention relates to the technical field of vibration reduction and isolation equipment, in particular to a monomer capsule membrane type molecular spring vibration isolator and an assembly method. The base in the vibration isolator is connected with the upper cover through a fastener. A buffer cavity for containing the molecular spring material is formed between the base and the upper cover. The sealing plate arranged at the top of the buffer cavity is connected with the upper cover. A sealing cavity is arranged between the sealing plate and the upper cover. The top of the upper cover is connected with the connecting plate through a buffer component. The middle part of the first disk and the middle part of the second disk in the buffer component are provided with through holes for the rubber shaft to penetrate through. The fiber sleeve is coated on the outer wall of the rubber shaft. And connecting belts used for connecting the first disk and the second disk are arranged at two ends of the fiber sleeve. The vibration isolator moves down and resets at the connecting plate, the rubber shaft repeatedly enters and exits the buffer cavity to compress and release the molecular spring medium, the structure of the existing molecular spring vibration isolator is optimized, the characteristics of high static stiffness and low dynamic stiffness are realized, the radial bearing capacity of the vibration isolator is improved, and the vibration isolation performance is greatly improved.

Description

Monomer capsule membrane type molecular spring vibration isolator and assembling method

Technical Field

The invention relates to the technical field of vibration reduction and isolation equipment, in particular to a monomer capsule membrane type molecular spring vibration isolator and an assembly method.

Background

The molecular spring vibration isolation buffering technology is a passive vibration isolation technology which takes a novel functional material, namely a molecular spring, as a working medium. The molecular spring material is formed by mixing water and micro-particles of porous materials with a large number of nano-scale hydrophobic micro-pores. Under high pressure, water molecules can invade into the hydrophobic micropores of the porous material and convert mechanical energy into liquid-solid surface energy for storage; when unloading, water molecules automatically escape from the hydrophobic micropores and convert the stored liquid-solid surface energy into mechanical energy to be released. In the process, the mechanical energy and the liquid-solid surface energy are mutually converted and a small part of energy is consumed. The molecular spring vibration isolation buffering technology is to realize vibration isolation and buffering by utilizing the characteristic of a molecular spring functional material.

In the process of compressing the molecular spring, water molecules cannot enter the hydrophobic micropores due to the hydrophobicity of the porous material, so that the molecular spring has extremely high rigidity in the low-pressure stage. However, once the pressure reaches a certain critical value, water molecules will penetrate the hydrophobic micropores in large amounts against the capillary force and the molecular spring stiffness will decrease abruptly. With the further increase of the pressure, after the water molecules in the hydrophobic micropores reach a saturated state, the water molecules stop invading the hydrophobic micropores, and the molecular spring shows extremely high rigidity.

Vibration isolators made using the molecular spring principle of the prior art include the bladder type and the piston type. For example, chinese patent document CN 105041943a discloses a capsule type molecular spring vibration isolation damper. The bumper includes an upper end plate, a bladder, and a lower end plate. The capsule body is arranged between the upper end plate and the lower end plate. The capsule body is filled with a molecular spring mixed medium. The spring mixing medium is formed by mixing water and porous hydrophobic particles containing nano-scale pores. The utricule changes according to the interval change between upper end plate and the lower end plate, and then makes the water business turn over in the nanometer pore of porous hydrophobic granule to make the buffer show the characteristic of high quiet low dynamic stiffness, satisfy heavy machinery equipment's vibration isolation demand.

Although the bladder of the above-described shock absorber exhibits good vibration isolation during axial loading thereof, the bladder of the shock absorber lacks the ability to carry radial loads. For example, when the heavy-duty machinery equipment generates a small deviation in the process of applying an axial load to the buffer, the bladder of the buffer can bear a radial load caused by the deviation, and the bladder is easily torn and damaged, even the actual effect of the whole buffer is caused, so that the heavy-duty machinery equipment has great potential safety hazard in the use process.

For another example, chinese patent document CN112963487A discloses a piston-type molecular spring vibration isolator. The vibration isolator comprises a base, a cavity cover, a piston rod, a sealing seat and a limiting seat. The vibration isolator adopts a telescopic structure of the piston to transmit vibration, ensures high pressure bearing in the vibration isolator, and has the characteristics of three signaturities of large damping, low rigidity and high bearing capacity. Although the radial rigidity of the vibration isolator is improved compared with the buffer, the radial load applied to the piston rod by the heavy mechanical equipment easily causes the axial deflection of the piston rod, so that the telescopic motion of the piston rod interferes with the cavity cover, and the buffering effect of the vibration isolator is influenced.

In summary, how to design a vibration isolation device in the process of implementing vibration isolation by using the molecular spring principle to optimize the structure of the existing molecular spring vibration isolator further improves the radial bearing capacity and the vibration isolation performance while satisfying the characteristics of high static and low dynamic stiffness, which is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a vibration isolation device in the process of implementing vibration isolation by utilizing a molecular spring principle, which is used for optimizing the structure of the conventional molecular spring vibration isolator, further improving the radial bearing capacity and improving the vibration isolation performance while meeting the characteristics of high static stiffness and low dynamic stiffness.

In order to achieve the purpose, the invention adopts the following scheme: the monomer capsule membrane type molecular spring vibration isolator comprises a base, an upper cover, a buffer assembly and a connecting plate connected with heavy mechanical equipment;

the top of the base is connected with the upper cover through a fastener, a buffer cavity for containing a molecular spring material is formed between the base and the upper cover, a sealing plate is arranged at the top of the buffer cavity and connected with the upper cover, a sealing cavity is arranged between the sealing plate and the upper cover, and the top of the upper cover is connected with a connecting plate through a buffer assembly;

the buffer assembly comprises a first disc, a second disc, a fiber sleeve and a rubber shaft, wherein through holes for the rubber shaft to penetrate through are formed in the middle of the first disc and the middle of the second disc, the fiber sleeve is coated on the outer wall of the rubber shaft, connecting belts are arranged at two ends of the fiber sleeve, the connecting belt at the tail end of the fiber sleeve is connected with the first disc, the connecting belt at the head end of the fiber sleeve is connected with the second disc, the first disc is connected with the upper cover, and the second disc is connected with the connecting plate;

the tail end of rubber axle is provided with sealed dish, sealed intracavity is arranged in to sealed dish and forms seal structure, and the middle part of closing plate is provided with first passageway, the middle part of upper cover is provided with the second passageway, first passageway and second passageway link to each other and form the slip chamber that supplies the rubber axle to pass through.

Preferably, the fiber sleeve is formed by weaving aramid fibers, the connecting belts are uniformly distributed along the circumferential direction of the fiber sleeve, the end part of the connecting belt at the head end of the fiber sleeve is sewn to form a first connecting ring connected with the first disc, the end part of the connecting belt at the tail end of the fiber sleeve is sewn to form a second connecting ring connected with the second disc, and the sewn parts of the connecting belts are all glued to form glue joints. So set up, be favorable to improving the fibre cover respectively with first disc and second disc between the joint strength, the gluey solid joint of the department of sewing up of connecting band is used for further improving the structural strength of first go-between and second go-between, has avoided the connecting band at heavy machinery's the in-process of repeated loading and uninstallation, takes place to tear the condition that collapses to take off, and then has improved the security and the stability of this monomer capsule film type molecular spring isolator.

Preferably, the bottom of buffer chamber is provided with the feed liquor hole, is provided with on the lateral wall of base and annotates the liquid mouth, and the feed liquor hole links to each other with annotating the liquid mouth through annotating the liquid passageway, and the bottom of base is provided with the leakage fluid dram, and the leakage fluid dram links to each other with the inside of buffer chamber. So set up, according to the use operating mode of isolator, be convenient for from the notes liquid mouth that sets up on the lateral wall of base through annotating the liquid passageway and pour into the molecule spring material into to the cushion chamber, be favorable to adjusting the quantity of molecule spring material, and then make the isolator demonstrate corresponding rigidity characteristic, further promoted the suitability of isolator.

Preferably, a first sealing groove is arranged between the base and the upper cover, the first sealing groove is located at the top of the base, and a sealing ring is embedded in the first sealing groove. So set up, first seal groove and sealing washer form static seal structure on the contact surface of base with the upper cover, have further promoted the leakproofness of cushion chamber, and then are favorable to improving the vibration isolation effect of isolator.

Preferably, a second sealing groove is formed in the sealing cavity, an annular bulge matched with the second sealing groove is formed in the sealing disc at the tail end of the rubber shaft, and the annular bulge is embedded into the second sealing groove. So set up, the annular bulge on the sealed dish forms static seal structure with the second seal groove at the top of cushion chamber, has promoted the leakproofness of cushion chamber greatly.

Preferably, the connecting plate is connected with the second disc through a first bolt, a first counter sink matched with the first bolt is arranged on the connecting plate, the first disc is connected with the upper cover through a second bolt, and a second counter sink matched with the second bolt is arranged on the upper cover.

Preferably, the sealing plate is connected with the top of the buffer cavity through a third bolt, and a round hole matched with the third bolt is formed in the sealing plate.

Preferably, the base is connected with the upper cover through a fourth bolt, and a third counter bore matched with the fourth bolt is formed in the bottom of the base.

Preferably, the rubber shaft is internally provided with a liquid storage cavity, and the liquid storage cavity is connected with the buffer cavity. So set up, the hollow rubber axle in inside can be better with the volume change that self takes place, through the change transmission to the cushion chamber of stock solution volume in the chamber, and then be favorable to optimizing the rigidity characteristic of isolator for the rigidity characteristic curve of isolator is more level and smooth, thereby has further promoted the vibration isolation performance of isolator.

The invention also provides an assembling method of the monomer capsule type molecular spring vibration isolator, which comprises the following steps:

step one, connecting the connecting bands at two ends of the fiber sleeve with a first disc and a second disc respectively, wherein the connecting band at the tail end of the fiber sleeve is wound and sewn at the edge of the first disc to form a first connecting ring, the connecting band at the head end of the fiber sleeve is wound and sewn at the edge of the second disc to form a second connecting ring, and then the sewn part of the connecting band is subjected to glue-fixing treatment to form a prefabricated body;

step two, the head end of the rubber shaft penetrates through a second through hole of the upper cover, a sealing disc arranged at the tail end of the rubber shaft is in contact with the upper cover to axially limit the rubber shaft, the head end of the rubber shaft penetrates through the second through hole and then penetrates out of the head end of the fiber sleeve through the interior of the fiber sleeve, and then the first disc is connected with the upper cover;

and step three, connecting the sealing plate with the upper cover, extruding the sealing plate by the locking force between the sealing plate and the upper cover to seal the top of the upper cover, and connecting the upper cover with the base by using a fastener.

Compared with the prior art, the monomer capsule type molecular spring vibration isolator and the assembling method thereof provided by the invention have the following outstanding substantive characteristics and remarkable progress: this monomer capsule membrane formula molecular spring isolator passes through the connecting plate with the load that heavy machinery equipment applyed, transmit to the rubber axle through the second disc, the rubber axle bears the load and takes place deformation, the fibre cover bears the inside pressure of rubber axle, the radial deformation of restriction rubber axle, make the rubber axle get into the cushion chamber through the slip chamber, therefore, move down and the in-process that resets at the connecting plate, the rubber axle passes in and out the cushion chamber repeatedly and makes the molecular spring medium compressed and release, the structure of current molecular spring isolator has been optimized, high static low dynamic stiffness characteristic has been realized, and simultaneously, the rubber axle is under the support of fibre cover, the radial bearing capacity of isolator has been improved, the vibration isolation performance has been promoted greatly.

Drawings

Fig. 1 is a schematic perspective view of a monomer membrane type molecular spring vibration isolator according to an embodiment of the invention;

FIG. 2 is a front view of FIG. 1;

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

FIG. 4 is a schematic assembly structure diagram of the monomer membrane type molecular spring vibration isolator in FIG. 1;

fig. 5 is a schematic diagram of the internal structure of the monomer membrane type molecular spring vibration isolator in fig. 1;

fig. 6 is a cross-sectional view at a-a in fig. 3.

Reference numerals: the device comprises a base 1, an upper cover 2, a first disc 3, a second disc 4, a connecting plate 5, a fiber sleeve 6, a rubber shaft 7, a sealing plate 8, a first bolt 9, a second bolt 10, a third bolt 11, a fourth bolt 12, a liquid injection port 13, a liquid discharge port 14, a first sealing groove 15, a second sealing groove 16, a liquid inlet hole 17 and a liquid injection channel 18.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The monomer membrane type molecular spring vibration isolator as shown in figures 1-6 is used for optimizing the structure of the existing molecular spring vibration isolator and improving the radial bearing capacity of the vibration isolator. The vibration isolator transmits load applied by heavy mechanical equipment to the rubber shaft through the connecting plate and the second disc, and the rubber shaft bears the load and deforms. The fiber sleeve bears the pressure inside the rubber shaft and limits the radial deformation of the rubber shaft, so that the rubber shaft enters the buffer cavity through the sliding cavity. Therefore, in the process of moving the connecting plate downwards and resetting, the rubber shaft repeatedly enters and exits the buffer cavity to compress and release the molecular spring medium, the structure of the conventional molecular spring vibration isolator is optimized, and the characteristics of high static stiffness and low dynamic stiffness are realized. Meanwhile, the rubber shaft is supported by the fiber sleeve, so that the radial bearing capacity of the vibration isolator is improved, and the vibration isolation performance is greatly improved.

As shown in fig. 1, the single membrane type molecular spring vibration isolator comprises a base 1, an upper cover 2, a buffering assembly and a connecting plate 5 for connecting heavy mechanical equipment. The top of the base 1 is connected to the upper cover 2 by fasteners. As shown in fig. 5, a buffer chamber for accommodating the molecular spring material is formed between the base 1 and the upper cover 2. The top of the buffer chamber is provided with a sealing plate 8. The sealing plate 8 is connected to the upper cover 2. A sealing cavity is formed between the sealing plate 8 and the upper cover 2. The top of the upper cover 2 is connected with the connecting plate 5 through a buffer assembly.

As shown in fig. 4, the damping assembly comprises a first disc 3, a second disc 4, a fibre sleeve 6 and a rubber shaft 7. The middle parts of the first disk 3 and the second disk 4 are provided with through holes for the rubber shaft 7 to penetrate through. The fiber sleeve 6 is coated on the outer wall of the rubber shaft 7. The two ends of the fiber sleeve 6 are provided with connecting belts. The connecting strip at the tail end of the fibre sleeve 6 is connected to the first disc 3. The connecting strip at the head end of the fibre cover 6 is connected to the second disc 4. The first disc 3 is connected to the upper cover 2. The second disc 4 is connected to a connecting plate 5.

As shown in fig. 5, the rear end of the rubber shaft 7 is provided with a seal disk. The sealing disk is disposed within the sealing cavity to form a sealing structure. The middle of the sealing plate 8 is provided with a first passage. The middle part of the upper cover 2 is provided with a second channel. The first channel and the second channel are connected to form a sliding chamber for the rubber shaft 7 to pass through.

Wherein the rubber shaft 7 is used to take up and transmit loads. The fiber sleeve 6 is used for bearing the pressure inside the rubber shaft 7 and limiting the radial deformation of the rubber shaft 7, so that the tail end of the rubber shaft 7 enters the buffer cavity through the sliding cavity, the molecular spring medium in the buffer cavity is compressed and released, and the rigidity characteristic of the vibration isolator is further optimized. The rubber shaft 7 utilizes the flexibility of the rubber shaft, and combines the constraint effect of the fiber sleeve 6, so that the connecting plate 5 can shift relative to the base 1, the radial bearing capacity of the vibration isolator is further improved, the failure of the vibration isolator is avoided, and the safety of the vibration isolator in the using process is ensured.

In order to further optimize the stiffness characteristic of the vibration isolator, the interior of the rubber shaft 7 has a fluid reservoir. The liquid storage cavity is connected with the buffer cavity. So set up, the hollow rubber axle 7 in inside can be better with the volume change that self takes place, through the change transmission of liquid volume in the stock solution chamber to the cushion chamber in, and then be favorable to optimizing the rigidity characteristic of isolator for the rigidity characteristic curve of isolator is more level and smooth, thereby has further promoted the vibration isolation performance of isolator.

As shown in fig. 2, the fiber cover 6 is woven from aramid fibers. As shown in fig. 4, the connection bands are uniformly arranged along the circumferential direction of the fiber set 6. The end of the connecting band at the head end of the fibre cover 6 is stitched to form a first connecting loop connected to the first disc 3. The end part of the connecting belt at the tail end of the fiber sleeve 6 is sewed to form a second connecting ring connected with the second disk 4, and the sewed parts of the connecting belt are all glued to form glued joints. So arranged, it is favorable to improving the joint strength between fibre cover 6 and first disc 3 and second disc 4 respectively. The glue joint at the sewing position of the connecting belt is used for further improving the structural strength of the first connecting ring and the second connecting ring, the situation that the connecting belt is torn and broken off in the repeated loading and unloading process of heavy mechanical equipment is avoided, and the safety and the stability of the monomer capsule membrane type molecular spring vibration isolator are further improved.

As shown in fig. 6, the bottom of the buffer chamber is provided with a liquid inlet hole 17. The side wall of the base 1 is provided with a liquid injection port 13. The liquid inlet hole 17 is connected with the liquid inlet 13 through a liquid inlet channel 18. The bottom of the base 1 is provided with a liquid discharge port 14. Drain port 14 is connected to the inside of the buffer chamber. So set up, according to the use operating mode of isolator, be convenient for from annotating liquid mouth 13 that sets up on the lateral wall of base 1 through annotating liquid passageway 18 to the buffer cavity in pour into the molecular spring material into, be favorable to adjusting the quantity of molecular spring material, and then make isolator demonstrate corresponding rigidity characteristic, further promoted the suitability of isolator.

As shown in fig. 5, a first seal groove 15 is provided between the base 1 and the upper cover 2. The first seal groove 15 is located at the top of the base 1. A seal ring is inserted into the first seal groove 15. So set up, first seal groove 15 and sealing washer form static seal structure on the contact surface of base 1 with upper cover 2, have further promoted the leakproofness of cushion chamber, and then are favorable to improving the vibration isolation effect of isolator.

As shown in fig. 6, a second seal groove 16 is disposed within the seal cavity. An annular bulge matched with the second sealing groove 16 is arranged on the sealing disc at the tail end of the rubber shaft 7, and the annular bulge is embedded in the second sealing groove 16. So set up, the annular bulge on the sealed dish forms static seal structure with second seal groove 16 at the top of cushion chamber, has promoted the leakproofness of cushion chamber greatly.

As shown in fig. 3 in combination with fig. 4, the connecting plate 5 is connected to the second disk 4 by a first bolt 9. The connecting plate 5 is provided with a first counter bore matched with the first bolt 9. The first disc 3 is connected to the upper cover 2 by means of a second bolt 10. The upper cover 2 is provided with a second countersunk hole matched with the second bolt 10.

As shown in fig. 5, the sealing plate 8 is connected to the top of the buffer chamber by a third bolt 11. And a round hole matched with the third bolt 11 is formed in the sealing plate 8. The base 1 is connected to the upper cover 2 by a fourth bolt 12. The bottom of the base 1 is provided with a third counter bore matched with the fourth bolt 12.

When the monomer capsule type molecular spring vibration isolator provided by the embodiment of the invention is assembled, the method comprises the following steps:

step two, the head end of the rubber shaft penetrates through a second through hole of the upper cover, a sealing disc arranged at the tail end of the rubber shaft is in contact with the upper cover to limit the rubber shaft axially, the head end of the rubber shaft penetrates through the second through hole, penetrates out of the head end of the fiber sleeve through the interior of the fiber sleeve, and then the first disc is connected with the upper cover;

Wherein, the fiber sleeve adopts the aramid fiber of Taipu dragon in the weaving process, and the specification of the weaving yarn is 1500 Dx 2 plying. Both ends of the fiber sleeve are provided with 8 connecting bands. And designing the number of the weaving yarn layers according to the size requirement of the rubber shaft. For example, the main body tube of the fiber cover has a weaving yarn layer sequence: 4 layers, 72 columns, 328 total; weaving yarn layer row of the single-flap connecting belt: 4 layers and 9 columns, 36 in total. Firstly weaving a split flanging part at one end, then combining yarns to continuously weave a main circular tube, and finally weaving a split part at the other end. After weaving, connecting the connecting bands with the first disc and the second disc respectively, adopting 100tex multiplied by 2 plied aramid fiber as a suture, and sewing eight connecting bands at two ends of the fiber sleeve to the first disc and the second disc by 3 stitches multiplied by 5 lines. After sewing, gluing the tail end of the flanging to prevent the prefabricated body structure from being loosened.

The present invention is not limited to the specific technical solutions described in the above embodiments, and the present invention may have other embodiments in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.

Claims

1. A monomer capsule membrane type molecular spring vibration isolator is characterized by comprising a base, an upper cover, a buffering assembly and a connecting plate connected with heavy mechanical equipment;

2. The monomer membrane type molecular spring vibration isolator as claimed in claim 1, wherein the fiber sleeve is woven from aramid fibers, the connecting belts are uniformly arranged along the circumferential direction of the fiber sleeve, the end of the connecting belt at the head end of the fiber sleeve is sewn to form a first connecting ring connected with the first disk, the end of the connecting belt at the tail end of the fiber sleeve is sewn to form a second connecting ring connected with the second disk, and the sewn parts of the connecting belts are all glued to form glue joints.

3. The single membrane type molecular spring vibration isolator of claim 1, wherein a liquid inlet hole is formed at the bottom of the buffer cavity, a liquid injection port is formed on the side wall of the base, the liquid inlet hole is connected with the liquid injection port through a liquid injection channel, and a liquid discharge port is formed at the bottom of the base and connected with the inside of the buffer cavity.

4. The monomer membrane type molecular spring vibration isolator as claimed in claim 1, wherein a first sealing groove is arranged between the base and the upper cover, the first sealing groove is located at the top of the base, and a sealing ring is embedded in the first sealing groove.

5. The monomer membrane type molecular spring vibration isolator as claimed in claim 1, wherein a second sealing groove is formed in the sealing cavity, an annular protrusion matched with the second sealing groove is formed on the sealing disk at the tail end of the rubber shaft, and the annular protrusion is embedded in the second sealing groove.

6. The single membrane type molecular spring vibration isolator of claim 1, wherein the connecting plate is connected with the second disk through a first bolt, the connecting plate is provided with a first counter bore matched with the first bolt, the first disk is connected with the upper cover through a second bolt, and the upper cover is provided with a second counter bore matched with the second bolt.

7. The single membrane type molecular spring vibration isolator of claim 1, wherein the sealing plate is connected with the top of the buffer cavity through a third bolt, and a round hole matched with the third bolt is formed in the sealing plate.

8. The single membrane type molecular spring vibration isolator of claim 1, wherein the base is connected with the upper cover through a fourth bolt, and a third counter-sunk hole matched with the fourth bolt is formed in the bottom of the base.

9. The monomer membrane type molecular spring vibration isolator as claimed in claim 1, wherein the rubber shaft has a reservoir chamber inside, and the reservoir chamber is connected with a buffer chamber.

10. The method for assembling the monomer membrane type molecular spring vibration isolator according to any one of claims 1 to 9, comprising: