CN113565918A - Vibration isolator based on hydraulic servo control - Google Patents
Vibration isolator based on hydraulic servo control Download PDFInfo
- Publication number
- CN113565918A CN113565918A CN202110851504.4A CN202110851504A CN113565918A CN 113565918 A CN113565918 A CN 113565918A CN 202110851504 A CN202110851504 A CN 202110851504A CN 113565918 A CN113565918 A CN 113565918A
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- China
- Prior art keywords
- magnetic ring
- rear end
- spring
- end cover
- pressing cap
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/002—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising at least one fluid spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3292—Sensor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
- F16F9/465—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall using servo control, the servo pressure being created by the flow of damping fluid, e.g. controlling pressure in a chamber downstream of a pilot passage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/08—Sensor arrangement
Abstract
The invention relates to a vibration isolator based on hydraulic servo control, which comprises a vibration isolation element, an integrated valve block and a control box, wherein the vibration isolation element is arranged on the integrated valve block; the vibration isolation element comprises a hydraulic cylinder, a spring, a piston, a thrust supporting block, a spring pressing cap, a magnetic ring and a displacement sensor; the rear end of the spring pressing cap is positioned in the hydraulic cylinder, the front end of the spring pressing cap extends out of the front end of the hydraulic cylinder and can move axially relative to the hydraulic cylinder, the thrust supporting block is fixedly arranged at the front end of the spring pressing cap, and the magnetic ring is fixedly arranged at the rear end of the spring pressing cap; the piston is arranged in the hydraulic cylinder, the spring is arranged between the spring pressing cap and the piston, a sealing cavity is formed between the piston and the rear end of the hydraulic cylinder, and the sealing cavity is connected with an oil outlet of the integrated valve block through an oil pipe; the displacement sensor is fixedly arranged at the rear end of the hydraulic cylinder, and the signal wire is connected with the control box; the integrated valve block is connected into a hydraulic system, and a signal wire is connected with the control box. The invention ensures that the displacement of the vibration source does not exceed a limit value by controlling the constant force of the self-adaptive vibration source through a hydraulic servo, and realizes the vibration isolation function in the full load range.
Description
Technical Field
The invention belongs to the technical field of vibration reduction and noise reduction, and particularly relates to a vibration isolator based on hydraulic servo control.
Background
The metal spring vibration isolator has the advantages of long application time, wide application, low inherent frequency, large bearing range, stable mechanical property, mature design and calculation method, simple and mature manufacturing process and the like. However, in a use environment where the variation range of the excitation constant force component of the vibration source is large and the displacement of the vibration source is limited, the compression range of the metal spring vibration isolator is limited, and the metal spring vibration isolator has a vibration isolation function in a certain load range by arranging a displacement protection structure and other methods, and when the constant force is too large, the displacement protection structure can be in rigid contact to lose the vibration isolation function, so that the requirement of vibration isolation in the full load range cannot be met.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a vibration isolator based on hydraulic servo control aiming at the problem that the existing metal spring vibration isolator cannot meet the service environment that the vibration source excitation constant force component has a large variation range and the vibration source displacement has a limit, wherein the vibration isolator ensures that the vibration source displacement does not exceed a limit value by controlling the self-adaptive vibration source constant force through the hydraulic servo, and realizes the vibration isolation function in the full load range.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a vibration isolator based on hydraulic servo control comprises a vibration isolation element, an integrated valve block and a control box; the vibration isolation element comprises a hydraulic cylinder, a spring, a piston, a thrust supporting block, a spring pressing cap, a magnetic ring fixing device and a displacement sensor; the rear end of the spring pressing cap is positioned in the hydraulic cylinder, the front end of the spring pressing cap extends out of the middle of the front end of the hydraulic cylinder, the spring pressing cap can move axially relative to the hydraulic cylinder, the thrust supporting block is fixedly arranged at the front end of the spring pressing cap, and the magnetic ring is fixedly arranged at the rear end of the spring pressing cap through a magnetic ring fixing device; the piston is arranged in the hydraulic cylinder, the spring is arranged between the spring pressing cap and the piston, a sealing cavity is formed between the piston and the rear end of the hydraulic cylinder, and the sealing cavity is connected with an oil outlet of the integrated valve block through an oil pipe; the displacement sensor is fixedly arranged at the rear end of the hydraulic cylinder, and a signal wire of the displacement sensor is connected with the control box; an oil inlet and an oil return port of the integrated valve block are connected to a hydraulic system, and a signal wire of the integrated valve block is connected with the control box; the control box controls the integrated valve block to act according to the displacement signal of the displacement sensor to actuate hydraulic pressure, and ensures that the displacement of the vibration source is kept within a design range.
In the above scheme, the hydraulic cylinder comprises a cylinder body, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are fixedly arranged at two ends of the cylinder body.
In the scheme, the displacement sensor is a magnetostrictive displacement sensor, the displacement sensor is fixedly arranged on the rear end cover, and the body of the displacement sensor extends into the cylinder body; the vibration isolation component further comprises a sealing sleeve which is sleeved outside the sensor body and is fixedly connected with the rear end cover.
In the above scheme, the inner periphery and the outer periphery of the piston are provided with the sealing rings, and the piston, the cylinder body, the sealing sleeve and the rear end cover form a sealing cavity.
In the scheme, the outer diameter of the thrust supporting block is larger than the inner diameter of the front end cover, a protective gap is arranged between the thrust supporting block and the front end cover, and the vibration source displacement is not limited to limited displacement.
In the above-mentioned scheme, the protection gap value is greater than the upper limit value of the design range and less than or equal to the limit displacement value.
In the scheme, a designed gap is reserved at the position where the spring pressing cap penetrates through the front end cover to prevent the spring pressing cap from being in rigid contact with the front end cover.
In the scheme, the rear end cover is provided with the exhaust hole, the position of the exhaust hole is adjusted according to the installation direction of the vibration isolation element, so that the exhaust hole is located at a physical high position and used for exhausting air in the sealing cavity during initial installation.
In the above scheme, the magnetic ring fixing device includes a magnetic ring fixing rod and a magnetic ring pressing plate, the magnetic ring fixing rod is fixedly installed at the rear end of the spring pressing cap, the magnetic ring pressing plate is fixedly installed at the rear end of the magnetic ring fixing rod, and the magnetic ring is embedded between the magnetic ring fixing rod and the magnetic ring pressing plate.
In the scheme, the spring pressing cap and the piston are both provided with the skirt edges so as to effectively keep the spring in the middle and avoid the deflection of the spring.
The invention has the beneficial effects that:
1. the vibration isolator based on hydraulic servo control is mainly used in the use environment with large vibration source excitation constant force component variation range and limited vibration source displacement, such as a thrust bearing and the like. The vibration isolator controls the self-adaptive vibration source constant force through hydraulic servo, when the vibration source excites the constant force component to change, the control box controls the valve block to act according to the displacement signal of the displacement sensor in the vibration isolation element to actuate hydraulic pressure, so that the vibration source displacement is ensured to be kept in a design range, and the vibration isolation function in a full load range is realized.
2. The invention is provided with rigid limit protection, realizes rigid limit under the condition of hydraulic control failure or special working condition, protects the displacement of the vibration source from exceeding limited displacement (namely allowable displacement), ensures the supporting effect and avoids the damage to the vibration source.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a general block diagram of the hydraulic servo-controlled based vibration isolator of the present invention;
fig. 2 is a structural view of vibration isolating elements of the vibration isolator shown in fig. 1.
In the figure: 1. a vibration isolation element; 11. a thrust support block; 12. a front end cover; 13. a spring pressing cap; 14. a cylinder body; 15. a spring; 16. a piston; 17. a sealing sleeve; 18. a rear end cap; 19. a displacement sensor; 110. a magnetic ring fixing rod; 111. a magnetic ring; 112. a magnetic ring pressing plate; 2. an integration valve block; 3. and a control box.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a vibration isolator based on hydraulic servo control provided by an embodiment of the present invention includes a vibration isolating element 1, an integrated valve block 2 and a control box 3. The vibration isolation element 1 is installed between a vibration source and a controlled object, and the vibration isolation element 1 comprises a cylinder 14, a spring 15, a piston 16, a front end cover 12, a rear end cover 18, a thrust supporting block 11, a spring pressing cap 13, a magnetic ring 111, a magnetic ring fixing device and a displacement sensor 19. The front end cap 12 and the rear end cap 18 are fixedly mounted at both ends of the cylinder 14. The rear end of the spring pressing cap 13 is positioned in the cylinder body 14, the front end of the spring pressing cap 13 extends out of the cylinder body 14 from the middle part of the front end cover 12, the spring pressing cap 13 can move axially relative to the cylinder body 14, the thrust supporting block 11 is fixedly arranged at the front end of the spring pressing cap 13, and the magnetic ring 111 is fixedly arranged at the rear end of the spring pressing cap 13 through a magnetic ring fixing device. The piston 16 is installed in the cylinder 14, the spring 15 is installed between the spring pressing cap 13 and the piston 16, and a sealed cavity is formed between the piston 16 and the rear end cover 18. The displacement sensor 19 is fixedly arranged on the rear end cover 18, and a signal wire of the displacement sensor 19 is connected with the control box 3. The integrated valve block 2 is connected with a hydraulic system and communicated with the sealing cavity through a pipeline, and a signal wire of the integrated valve block 2 is connected with the control box 3.
Further preferably, in this embodiment, the magnetic ring fixing device includes a magnetic ring fixing rod 110 and a magnetic ring pressing plate 112, the magnetic ring fixing rod 110 is fixedly installed at the rear end of the spring pressing cap 13, the magnetic ring pressing plate 112 is fixedly installed at the rear end of the magnetic ring fixing rod 110, and the magnetic ring 111 is embedded between the magnetic ring fixing rod 110 and the magnetic ring pressing plate 112.
Further preferably, in this embodiment, the displacement sensor 19 is a magnetostrictive displacement sensor, and the sensor body extends into the cylinder 14. The sealing sleeve 17 is sleeved outside the sensor body and is fixedly connected with the rear end cover 18.
Further preferably, in the present embodiment, the inner and outer peripheries of the piston 16 are provided with sealing rings to form a sealing cavity with the cylinder 14, the sealing sleeve 17 and the rear end cover 18.
The working principle is as follows: when the vibration isolation element 1 is excited by a vibration source, the thrust supporting block 11, the spring pressing cap 13, the magnetic ring fixing rod 110, the magnetic ring 111 and the magnetic ring pressing plate 112 move towards the rear end cover 18 under the excitation action and compress the spring 15, and the magnetic ring 111 and the displacement sensor 19 generate relative displacement. The control box 3 collects relative displacement signals of the magnetic ring 111 and the displacement sensor 19 in real time, controls the integrated valve block 2 according to the displacement signals, controls the integrated valve block 2 to pressurize when the displacement exceeds the upper limit of a design range (1mm-2mm), hydraulic oil enters a sealed cavity of the vibration isolation element through the integrated valve block 2, pushes the piston 16, the spring 15, the spring pressure cap 13 and the thrust support block 11 to move towards the front end cover 12 under the action of the hydraulic oil until the relative displacement of the magnetic ring 111 and the displacement sensor 19 reaches the middle position (1.5 +/-0.1 mm) of the design range, and closes the integrated valve block 2; when the excitation of the vibration source is reduced, the spring pressure cap 13 and the thrust supporting block 11 move towards the direction of the front end cover 12 under the action of the spring 15 and hydraulic oil, when the displacement is reduced and exceeds the lower limit of the design range (1mm-2mm), the control box 3 controls the integrated valve block 2 to release pressure, the hydraulic oil is released into a hydraulic system from the sealed cavity of the vibration isolation element 1 through the integrated valve block 2, the piston 16, the spring 15, the spring pressure cap 13 and the thrust supporting block 11 move towards the direction of the front end cover 12 until the relative displacement between the magnetic ring 111 and the displacement sensor 19 reaches the middle position (1.5 +/-0.1 mm) in the design range, the integrated valve block 2 is closed, and at the moment, new force balance of all parts is achieved.
Further preferably, in this embodiment, the outer diameter of the thrust support block 11 is larger than the inner diameter of the front end cover 12, and a protection gap (3mm) is provided between the thrust support block 11 and the front end cover 12. When the excitation increasing speed of the vibration source is too high or the hydraulic control fails, the thrust supporting block 11 is in rigid contact with the front end cover 12 under the action of excitation force, at the moment, the vibration isolation element 1 loses the vibration damping function, but can still play a supporting and bearing role, and the displacement of the vibration source is protected from exceeding the limited displacement (3 mm).
Further, in this embodiment, a design gap is left at a position where the spring pressing cap 13 penetrates through the front end cover 12, so that the spring pressing cap 13 can be prevented from being in rigid contact with the front end cover 12, and the damping effect is prevented from being weakened by the rigid contact.
Further preferably, in the present embodiment, the spring pressing cap 13 and the piston 16 are provided with skirts to effectively protect the middle spring 15 and prevent the spring 15 from deflecting.
Further preferably, in this embodiment, the rear end cover 18 is provided with an exhaust hole, and the position of the exhaust hole is adjusted according to the installation direction of the vibration isolation element 1, so that the exhaust hole is located at a physical high position, and air in the sealed cavity needs to be exhausted during initial installation.
In this embodiment, the design range of 1-2mm is given as an example, and other numbers are still within the protection range.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The vibration isolator based on hydraulic servo control is characterized by comprising a vibration isolation element (1), an integrated valve block (2) and a control box (3);
the vibration isolation element (1) comprises a hydraulic cylinder, a spring (15), a piston (16), a thrust supporting block (11), a spring pressing cap (13), a magnetic ring (111), a magnetic ring fixing device and a displacement sensor (19); the rear end of the spring pressing cap (13) is positioned in the hydraulic cylinder, the front end of the spring pressing cap extends out of the middle of the front end of the hydraulic cylinder, the spring pressing cap (13) can move axially relative to the hydraulic cylinder, the thrust supporting block (11) is fixedly arranged at the front end of the spring pressing cap (13), and the magnetic ring (111) is fixedly arranged at the rear end of the spring pressing cap (13) through a magnetic ring fixing device; the piston (16) is installed in the hydraulic cylinder, the spring (15) is installed between the spring pressing cap (13) and the piston (16), a sealing cavity is formed between the piston (16) and the rear end of the hydraulic cylinder, and the sealing cavity is connected with an oil outlet of the integrated valve block (2) through an oil pipe; the displacement sensor (19) is fixedly arranged at the rear end of the hydraulic cylinder, and a signal wire of the displacement sensor (19) is connected with the control box (3); an oil inlet and an oil return port of the integrated valve block (2) are connected into a hydraulic system, and a signal wire of the integrated valve block (2) is connected with the control box (3); the control box (3) controls the integrated valve block (2) to act according to a displacement signal of the displacement sensor (19) to actuate hydraulic pressure, so that the displacement of the vibration source is kept within a design range.
2. The vibration isolator based on hydraulic servo control according to claim 1, wherein the hydraulic cylinder comprises a cylinder body (14), a front end cover (12) and a rear end cover (18), and the front end cover (12) and the rear end cover (18) are fixedly installed at two ends of the cylinder body (14).
3. The vibration isolator based on hydraulic servo control as claimed in claim 2, characterized in that the displacement sensor (19) adopts a magnetostrictive displacement sensor, the displacement sensor (19) is fixedly arranged on the rear end cover (18), and the body of the displacement sensor extends into the cylinder body (14); the vibration isolation element (1) further comprises a sealing sleeve (17), and the sealing sleeve (17) is sleeved outside the sensor body and fixedly connected with the rear end cover (18).
4. The vibration isolator based on hydraulic servo control according to claim 3, characterized in that the inner and outer peripheries of the piston (16) are provided with sealing rings, and the piston (16) forms a sealing cavity with the cylinder body (14), the sealing sleeve (17) and the rear end cover (18).
5. The vibration isolator based on hydraulic servo control as claimed in claim 2, characterized in that the outer diameter of the thrust support block (11) is larger than the inner diameter of the front end cover (12), and a protective gap is arranged between the thrust support block (11) and the front end cover (12) to ensure that the vibration source displacement does not exceed a limited displacement.
6. The hydraulic servo control-based vibration isolator of claim 5, wherein the protection clearance value is greater than the upper limit of the design range and less than or equal to the limit displacement value.
7. The vibration isolator based on hydraulic servo control according to claim 2, characterized in that the spring pressure cap (13) is provided with a designed clearance at the position of passing through the front end cover (12) so as to prevent the spring pressure cap (13) from rigidly contacting the front end cover (12).
8. The vibration isolator based on hydraulic servo control as claimed in claim 2, wherein the rear end cover (18) is provided with an exhaust hole, and the position of the exhaust hole is adjusted according to the installation direction of the vibration isolation element (1) so that the exhaust hole is at a physical high position for exhausting air in the sealed cavity during initial installation.
9. The vibration isolator based on hydraulic servo control as claimed in claim 1, wherein the magnetic ring fixing device comprises a magnetic ring fixing rod (110) and a magnetic ring pressing plate (112), the magnetic ring fixing rod (110) is fixedly installed at the rear end of the spring pressing cap (13), the magnetic ring pressing plate (112) is fixedly installed at the rear end of the magnetic ring fixing rod (110), and the magnetic ring (111) is embedded between the magnetic ring fixing rod (110) and the magnetic ring pressing plate (112).
10. The vibration isolator based on hydraulic servo control as claimed in claim 1, characterized in that the spring pressing cap (13) and the piston (16) are provided with skirts to effectively protect the middle spring (15) from deflection of the spring (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851504.4A CN113565918A (en) | 2021-07-27 | 2021-07-27 | Vibration isolator based on hydraulic servo control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851504.4A CN113565918A (en) | 2021-07-27 | 2021-07-27 | Vibration isolator based on hydraulic servo control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113565918A true CN113565918A (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110851504.4A Pending CN113565918A (en) | 2021-07-27 | 2021-07-27 | Vibration isolator based on hydraulic servo control |
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| Country | Link |
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| CN (1) | CN113565918A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158898A (en) * | 1965-10-29 | 1969-07-23 | August Bilstein | Improvements in or relating to Gradually Adjustable Shock Absorbers |
| CN105774788A (en) * | 2016-03-04 | 2016-07-20 | 吉林大学 | Electric power-assisted braking system with composite functions |
| CN108458034A (en) * | 2018-03-20 | 2018-08-28 | 华中科技大学 | Adjustable loaded metal Zero-rigidity vibration isolator |
| CN110749433A (en) * | 2019-11-12 | 2020-02-04 | 江苏一重数控机床有限公司 | Pressure follow-up device for expansion joint pressure test platform and control method thereof |
| CN113107971A (en) * | 2021-05-06 | 2021-07-13 | 东台市远洋船舶配件有限公司 | Thrust bearing with vibration-damping piston |
-
2021
- 2021-07-27 CN CN202110851504.4A patent/CN113565918A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158898A (en) * | 1965-10-29 | 1969-07-23 | August Bilstein | Improvements in or relating to Gradually Adjustable Shock Absorbers |
| CN105774788A (en) * | 2016-03-04 | 2016-07-20 | 吉林大学 | Electric power-assisted braking system with composite functions |
| CN108458034A (en) * | 2018-03-20 | 2018-08-28 | 华中科技大学 | Adjustable loaded metal Zero-rigidity vibration isolator |
| CN110749433A (en) * | 2019-11-12 | 2020-02-04 | 江苏一重数控机床有限公司 | Pressure follow-up device for expansion joint pressure test platform and control method thereof |
| CN113107971A (en) * | 2021-05-06 | 2021-07-13 | 东台市远洋船舶配件有限公司 | Thrust bearing with vibration-damping piston |
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Application publication date: 20211029 |
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