CN102628486A - Stiffness and damp variable air vibration isolation support - Google Patents
Stiffness and damp variable air vibration isolation support Download PDFInfo
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- CN102628486A CN102628486A CN2012100942066A CN201210094206A CN102628486A CN 102628486 A CN102628486 A CN 102628486A CN 2012100942066 A CN2012100942066 A CN 2012100942066A CN 201210094206 A CN201210094206 A CN 201210094206A CN 102628486 A CN102628486 A CN 102628486A
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Abstract
The invention relates to a stiffness and damp variable air vibration isolation support, which belongs to the field of vibration control. An air spring is composed of four parts of a movable cylinder, a fixed bottom cylinder, a throttling device and an air valve. The movable cylinder is inverse U-shaped, caliber of the movable cylinder is slightly larger than the fixed bottom cylinder, the movable cylinder is buckled on the fixed bottom cylinder in a semi-surrounding mode, and sealing strips are filled between the outer wall of the fixed bottom cylinder and the inner wall of the movable cylinder to enable the movable cylinder to be a sealed cavity. The throttling device is composed of a throttling pipe and a throttling valve sheet, the throttling pipe is used for connecting the movable cylinder and the fixed bottom cylinder, an upper small air valve and a lower small air valve are arranged inside the throttling pipe, and the throttling valve sheet are arranged between the two small air valves. The air valve can adjust air pressure of air in the cylinder and height of the air spring. The air valve can further be communicated with other air spring to cooperatively work. The stiffness and damp variable air vibration isolation support has the advantages of being high in bearing capacity, low in vibration isolation frequency, wide in self-damping and application scope and the like, capable of isolating vibration on the vertical direction, and capable of forming a three-direction vibration isolation support by combining with other horizontal vibration isolation supports.
Description
Technical field
The present invention relates to a kind of air vibration isolating suspension in vibration control field.
Background technique
Progress along with science and technology; A lot of fields relate to little vibration control technology; Production like polysilicon chip in the IC factory building needs little vibration control technology, and the normal operation of precision instrument and equipments such as laser needs little vibration control technology, and defence and military projects such as radar need little vibration control technology.
Little vibration control technology can be controlled from a plurality of links such as vibration source, propagation path, structural design, Equipment Foundations; China uses the more little control technique of shaking of pneumatic spring for Equipment Foundations are carried out at present; But development along with production technology; Instrument and equipment is also increasingly high to the requirement of precision; The precision of traditional pneumatic spring vibration isolation technique is in urgent need to be improved, and problems such as isolation frequency, damping, bearing capacity, gas leakage are the Several Key Problems of pneumatic spring vibration isolation technique, also is the key issue that improves little vibration control technology precision.
Existing pneumatic spring is common to have single formula pneumatic spring, many musical forms pneumatic spring, constraint diaphragm type pneumatic spring, free film formula pneumatic spring etc.The problem that existing pneumatic spring exists is, variable rigidity property is poor, and lateral stability is poor, single damping, shortcoming such as Applicable scope is single.
Summary of the invention
The present invention intends from vibration source and two aspects of Equipment Foundations control is implemented in little vibration.The source of little vibration is a lot; Comprise that vibration, inside configuration power equipment that accidental loads such as power equipment vibration, explosion bump such as earth pulsation, traffic induced vibration, forging hammer bring out vibrate (like air-conditioning, crane, driving), stream of people's vibration etc.; What wherein influence was big, occurrence frequency is higher is the traffic induced vibration; With the vibration of inside configuration power equipment, all can adopt the present invention to become stiffness and damping changing air vibration isolating suspension to these two kinds of vibrations and implement control.
Be to realize above-mentioned purpose, the technological scheme that the present invention adopts is: this change stiffness and damping changing air vibration isolating suspension is by moving cylinder, fixedly end cylinder, throttling arrangement and Air valves are formed; Throttling arrangement is made up of throttle pipe and throttle valve plate.End cylinder is " mouth " shape; Moving cylinder is down " U " shape, and bore is slightly larger than fixedly end cylinder, and is buckled in fixedly and is half-surrounded on the end cylinder; Do encapsulation process between two cylinders, fixedly be plugged with Stamping Steel Ribbon between end cylinder outer wall and the moving cylinder inwall and make moving cylinder become the hermetic cavity body.Throttling arrangement is made up of throttle pipe and throttle valve plate, and throttle pipe is " C " shape, the throttle pipe two ends respectively with moving cylinder and fixing end cylinder, said throttle pipe is provided with two air valves up and down, the throttle pipe section between the said air valve is provided with throttle valve plate.Throttle valve plate is located at the inside of throttle pipe in the form of sheets, is used to control the flow velocity through the air of throttle pipe.Have holes such as circle, semicircle, star, polygonal on the throttle valve plate, the hole on the throttle valve plate has at least one; The throttle valve plate that has the difformity hole has different damping characteristics.Throttle valve plate has convertibility: when pneumatic spring is in running order, regulates and need close two little air valves up and down before throttle valve plate is changed in damping.Throttle valve plate is by steel or other hard material processing and fabricatings.
Air valves is made up of barometer, tracheae and switch, and this Air valves is positioned at fixedly end cylinder side bottom, can connect air pump through tracheae and charge and discharge gas, changes the air pressure in the cylinder, also can connect another pneumatic spring, collaborative work through tracheae.Barometer is installed earlier during installation, switch is installed again.But tracheae is processed by the material of soft pressure-bearing, to guarantee moving cylinder and fixedly during end cylinder generation relative displacement, the tracheae retractable.
Moving cylinder and fixedly on the top board of end cylinder and fixedly be equipped with mounting plate on the base plate of end cylinder.Mounting plate is welded in the outer, top surface and the bottom surface of cylinder, and mounting plate is provided with to be installed screw and hole is installed, and is used to connect pneumatic spring and other devices.The installation hole is a long-round-shape, and the bolt that penetrates in the installation process wherein is free to slide in the certain level displacement range, to regulate the mounting point.
Behind this pneumatic spring installation in position, can adopt air pump to connect Air valves and in cylinder, inflate, guarantee that simultaneously two little air valves are in opening state, treat to get final product off switch after barometer is shown as rating value.
Have difform hole on the different throttle valve plates, different holes can produce the damping of different sizes when air passes, promptly so-called change damping one; Adopt identical throttle valve plate, when bigger distortion took place bearing, part pressurized air will be at moving cylinder and fixedly is moved with certain speed in two containers of end cylinder, and air can produce damping two at the hole that shuttles back and forth on throttle valve plate; Damping one can be through regulating throttle valve plate with its control within the specific limits.
In order to prevent that excessive distortion from causing device damage, be provided with the safety locking node, the operating range of restriction instrument is in certain scope.
When bigger distortion takes place in bearing, the gas quilt compression in various degree in the cylinder, the size of reaction at support and compression displacement is inverse ratio, the promptly so-called rigidity that becomes.
The present invention can with various horizontal shock insulation members, like combinations such as lead rubber bearing, metal friction sliding isolated bearings, form the three-dimensional isolation mounting.
The invention has the advantages that:
1. the present invention adopts throttle valve plate to regulate the damping of air vibration isolating suspension, convenient control vibration, and can change throttle valve plate as the case may be, the convenient use.
2. the present invention can prevent effectively that through the safety locking node that is provided with excessive distortion from causing device damage, and the vertical deformation of restriction instrument is in certain scope.
3. this vibration isolating suspension in the vertical direction, the power that not only can provide support can also provide enough pulling force.During instrument work, be installed on equipment or the basis through version is installed, when meeting little vibration, moving cylinder moves downward, and instrument internal air pressure increases, and air communication is crossed throttle valve plate, because the effect of damping, consumed energy provides certain holding power; When meeting pulling force upwards, moving cylinder moves upward, and air pressure reduces, because the damping function of throttle valve plate, consumed energy provides a part of pulling force.
4. the present invention both can isolate the small ambient vibration on the vertical direction, also can isolate vertical earthquake motion.As little shake or vertical earthquake motion when substrate is imported into, fixedly end cylinder is at first imported in little vibration into, up-down vibration takes place in end cylinder under oscillating action; When end cylinder upwards vibrated, the gas in the moving cylinder was compressed, and air pressure increases; Therefore gas can flow to the lower end cylinder of air pressure through flow controller, and air can produce certain damping when passing throttle valve plate; Consume the energy of little vibration, reach the effect of vertical vibration isolation.
5. the present invention can make up with existing horizontal damping support, forms the three-dimensional vibration isolating suspension.
The present invention both can be used for being equipped with the vibration damping shock insulation of building such as high-new precision type instrument, also can be used for the vibration isolation of viaduct, also can be used for the vibration damping shock insulation of subway, viaduct building structure along the line, and the vibration isolation of heritage building was reinforced.
Description of drawings
Fig. 1 is the structure diagram of an embodiment of the present invention;
Fig. 2 is the plane view of mounting plate;
Fig. 3 is the flow controller detail drawing;
Fig. 4 is throttle valve plate structure view ();
Fig. 5 is throttle valve plate structure view (two);
Fig. 6 is throttle valve plate structure view (three);
Fig. 7 is a safety locking node diagrammatic sketch of the present invention;
Fig. 8 installs diagrammatic sketch for Air valves of the present invention;
Fig. 9 is the configuration diagram of stiffening rib of the present invention;
Figure 10 is second a kind of embodiment's of the present invention structure diagram;
Figure 11 is the third an embodiment's of the present invention structure diagram.
Among the figure: 1, moving cylinder, 2, fixing end cylinder, 3, throttling arrangement, 4, Air valves, 5, throttle pipe, 6, throttle valve plate; 7, hole, 8, little air valve, 9, barometer, 10, tracheae, 11, switch; 12, mounting plate, 13, screw is installed, 14, hole is installed, 15, horizontal lead rubber bearing, 16, the metal friction slip support abutment; 17, safety locking node, 17.1, " [" shape restriction card, 17.2, the spacing card of "-" shape, 18, Stamping Steel Ribbon, 19, stiffening rib.
Embodiment
Specify embodiments of the invention one below in conjunction with accompanying drawing, be applied to the basic vibration isolation of precision instrument and equipment.
As shown in Figure 1, this change stiffness and damping changing air vibration isolating suspension is by moving cylinder 1, fixedly end cylinder 2, throttling arrangement 3 and Air valves 4 are formed; Throttling arrangement 3 is made up of throttle pipe 5 and throttle valve plate 6, referring to Fig. 3.Fixedly end cylinder 2 is " mouth " shape; Moving cylinder 1 is down " U " shape, and bore is slightly larger than fixedly end cylinder 2, and is buckled in fixedly and is half-surrounded on the end cylinder 2; Do encapsulation process between two cylinders, fixedly be plugged with Stamping Steel Ribbon 18 between end cylinder 2 outer walls and moving cylinder 1 inwall and make moving cylinder 1 become the hermetic cavity body.Said moving cylinder 1, fixedly cylinder 2 inner side surfaces in the end also can be provided with the stiffening rib 19 that increases its rigidity, referring to Fig. 9.Throttling arrangement 3 is made up of throttle pipe 5 and throttle valve plate 6, and throttle pipe 5 is " C " shape, connects moving cylinder 1 and fixing end cylinder 2, is provided with throttle valve plate 6 between 8, two stingy valves 8 of two stingy valves about the inside of throttle pipe 5 is provided with.Throttle valve plate 6 is located at the inside of throttle pipe 5 in the form of sheets, is used to control the flow velocity through the air of throttle pipe 5.Have holes 7 such as circle, semicircle, star, polygonal on the throttle valve plate 6, the quantity of this hole 7 is at least one referring to Fig. 4～6; The throttle valve plate 6 that has the difformity hole has different damping characteristics.Throttle valve plate 6 has convertibility: when pneumatic spring is in running order, need close two stingy valves 8 up and down before the replacing throttle valve plate 6.Throttle valve plate 6 is by steel or other hard material processing and fabricatings.
Said moving cylinder 1 with fixedly on end cylinder 2 outer walls safety locking node 17 is set; Said safety locking node 17 by be arranged on fixing end cylinder 2 outer walls " [" shape restriction card 17.1 is formed with the spacing card 17.2 of "-" shape that is arranged on the moving cylinder 1, and wherein, said " restriction of [" shape blocks 17.1 following side plate and is fixedly connected with fixing end cylinder 2 outer walls; It is said that " the last side plate of [" shape restriction card 17.1 is free; Spacing card 17.2 one ends of said "-" shape and moving cylinder 1 are fixing, and the other end is encorbelmented, after the installation; It is said that " position of the last side plate of [" shape restriction card 17.1 is higher than the position of the spacing card 17.2 of "-" shape, referring to shown in Figure 7.
On the top board of moving cylinder 1 and fixing end cylinder 2 and fixedly be equipped with mounting plate 12 on the base plate of end cylinder 2.Referring to Fig. 2, mounting plate 12 is welded in the end face or the bottom surface of cylinder, and mounting plate 12 is provided with to be installed screw 13 and hole 14 is installed, and is used to connect pneumatic spring and other devices.It is long-round-shape that hole 14 is installed, and the bolt that can guarantee in installation process, to penetrate wherein can be free to slide in the certain level displacement range, to regulate the mounting point.
Behind this pneumatic spring installation in position; Can adopt air pump to connect Air valves 4 inflates in cylinder; Guarantee that simultaneously two stingy valves 8 are in opening state, treat to close Air valves 4 after barometer 9 is shown as rating value that the variation that safety locking node 17 can guarantee moving cylinder 1 within the specific limits; Prevent that the excessive moving cylinder 1 of air pressure breaks away from fixedly end cylinder 2, can prevent that also excessive compressive strain from causing damage to instrument.
Have difform hole 7 on the different throttle valve plates 6, different holes 7 can produce the damping of different sizes when air passes, so-called change damping one; Adopt identical throttle valve plate 6, when bigger distortion took place bearing, part pressurized air will and fixedly be moved with certain speed in 2 two containers of end cylinder at moving cylinder 1, and air can produce dampings two at the hole 7 that shuttles back and forth on throttle valve plate 6; Damping one can be through regulating throttle valve plate 6 with its control within the specific limits.Change throttle valve plate 6 when regulating the damping size when need, stingy valve 8 cuts out up and down earlier, and behind to be replaced the finishing, stingy valve 8 is opened up and down again, reworks.
When substrate was imported into, fixedly end cylinder 2 was at first imported in little vibration into as little vibration, and fixedly up-down vibration takes place under oscillating action end cylinder 2; When fixedly end cylinder 2 upwards vibrated, the gas in the moving cylinder 1 was compressed, and air pressure increases; Therefore gas can flow to the lower fixedly end cylinder 2 of air pressure through Air valves; Air can produce certain damping when passing throttle valve plate 6, consume the energy of little vibration.
Can be according to the requirement of size, frequency and the instrument and equipment of external little vibration, the type of the air pressure of choose reasonable bearing and throttle valve plate 6 to little vibration index.
Shown in figure 10, be another embodiment of the present invention, be composed in series by vertical support and horizontal lead rubber bearing 15, vertical support wherein is identical with above example structure.Shown in figure 11, be another embodiment of the present invention, be composed in series by vertical support and metal friction slip support abutment 16, vertical support wherein is identical with above example structure.Through with the combination of existing device for vibration insutation, good result with vertical vibration isolation simultaneously can be up to the standard.
Claims (10)
1. one kind becomes stiffness and damping changing air vibration isolating suspension, it is characterized in that: comprise moving cylinder (1), fixedly end cylinder (2), throttling arrangement (3) and Air valves (4); Described fixedly end cylinder (2) is " mouth " shape; Said cylinder-variable (1) is down " U " shape; Its bore is slightly larger than fixedly end cylinder (2); Be buckled in fixedly and be half-surrounded on the end cylinder (2), be plugged with Stamping Steel Ribbon (18) between cylinder (2) outer wall of the said fixedly end and cylinder-variable (1) inwall and make cylinder-variable (1) become the hermetic cavity body, said fixedly end cylinder (2) and cylinder-variable (1) are communicated with through throttling arrangement (3).
2. change stiffness and damping changing air vibration isolating suspension according to claim 1; It is characterized in that: said throttling arrangement (3) is made up of throttle pipe (5) and throttle valve plate (6); Said throttle pipe (5) two ends respectively with moving cylinder (1) and fixing end cylinder (2); Said throttle pipe (5) is provided with at least two air valves (8), and throttle pipe (5) section between the said air valve (8) is provided with throttle valve plate (6).
3. change stiffness and damping changing air vibration isolating suspension according to claim 2, it is characterized in that: said throttle valve plate (6) distributes in the form of sheets, and hides in throttle pipe (5).
4. according to claim 2 or 3 described change stiffness and damping changing air vibration isolating suspensions, it is characterized in that: have at least one hole (7) on the said throttle valve plate (6), described hole (7) be shaped as circle, semicircle, star or polygonal.
5. according to claim 2 or 3 described change stiffness and damping changing air vibration isolating suspensions, it is characterized in that: described throttle valve plate (6) is steel disc or hard plastic sheet.
6. according to claim 2 or 3 described change stiffness and damping changing air vibration isolating suspensions; It is characterized in that: said Air valves (4) is made up of barometer (9), tracheae (10) and switch (11); The mounting point of said barometer (9), switch (11) is followed successively by from the inside to the outside: barometer (9), switch (11), said tracheae (10) is the flexible pipe of retractable.
7. change stiffness and damping changing air vibration isolating suspension according to claim 1 is characterized in that: the end face of said moving cylinder (1) and fixedly be equipped with mounting plate (12) on the bottom surface of end cylinder (2).
8. change stiffness and damping changing air vibration isolating suspension according to claim 1 is characterized in that: evenly have on the said mounting plate (12) hole (14) is installed, said installation hole (14) is a long-round-shape.
9. change stiffness and damping changing air vibration isolating suspension according to claim 1 is characterized in that: said moving cylinder (1), fixedly end cylinder (2) inner side surface is provided with the stiffening rib (19) that increases its rigidity.
10. change stiffness and damping changing air vibration isolating suspension according to claim 1; It is characterized in that: said moving cylinder (1) and fixedly on end cylinder (2) outer wall safety locking node (17) is set; Said safety locking node (17) by be arranged on fixing end cylinder (2) outer wall " [" shape restriction card (17.1) and the spacing card of "-" shape (17.2) that is arranged on the moving cylinder (1) are formed; It is wherein, said that " the following side plate of [" shape restriction card (17.1) is fixedly connected with fixing end cylinder (2) outer wall, and said " restriction of [" shape blocks the last side plate freedom of (17.1); Spacing card (17.2) one ends of said "-" shape and moving cylinder (1) are fixing; The other end is encorbelmented, and after the installation, said " position of the last side plate of [" shape restriction card (17.1) is higher than the position of the spacing card of "-" shape (17.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100942066A CN102628486A (en) | 2012-04-01 | 2012-04-01 | Stiffness and damp variable air vibration isolation support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100942066A CN102628486A (en) | 2012-04-01 | 2012-04-01 | Stiffness and damp variable air vibration isolation support |
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| CN102628486A true CN102628486A (en) | 2012-08-08 |
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| CN2012100942066A Pending CN102628486A (en) | 2012-04-01 | 2012-04-01 | Stiffness and damp variable air vibration isolation support |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777531A (en) * | 2012-08-21 | 2012-11-14 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN104534011A (en) * | 2014-12-10 | 2015-04-22 | 重庆大学 | Permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping |
| CN108611969A (en) * | 2018-06-07 | 2018-10-02 | 重庆工业职业技术学院 | A kind of bridge pad with damping isolation function |
-
2012
- 2012-04-01 CN CN2012100942066A patent/CN102628486A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777531A (en) * | 2012-08-21 | 2012-11-14 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN102777531B (en) * | 2012-08-21 | 2014-04-30 | 宣昌黎 | Pressure-stabilizing variable frequency damper |
| CN104534011A (en) * | 2014-12-10 | 2015-04-22 | 重庆大学 | Permanent magnet type magneto-rheological vibrating isolation support with adjustable rigidity and damping |
| CN104534011B (en) * | 2014-12-10 | 2016-07-06 | 重庆大学 | A kind of adjustable permanent magnet type magnetic current variable vibration isolating suspension of stiffness and damping |
| CN108611969A (en) * | 2018-06-07 | 2018-10-02 | 重庆工业职业技术学院 | A kind of bridge pad with damping isolation function |
| CN108611969B (en) * | 2018-06-07 | 2019-10-15 | 重庆工业职业技术学院 | A kind of bridge pad with damping isolation function |
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