CN107448534B - Novel shock absorber and preparation process thereof - Google Patents
Novel shock absorber and preparation process thereof Download PDFInfo
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- CN107448534B CN107448534B CN201710749970.5A CN201710749970A CN107448534B CN 107448534 B CN107448534 B CN 107448534B CN 201710749970 A CN201710749970 A CN 201710749970A CN 107448534 B CN107448534 B CN 107448534B
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- cylinder body
- connecting mandrel
- shock absorption
- ball head
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
- F16F7/108—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on plastics springs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
The invention provides a novel shock absorber and a preparation process thereof, wherein the novel shock absorber comprises a shock absorption cylinder body, a connecting mandrel and an elastic body, wherein the connecting mandrel is partially arranged in the shock absorption cylinder body, the elastic body is arranged between the shock absorption cylinder body and the connecting mandrel, and the connecting mandrel is fixed in the shock absorption cylinder body through the elastic body; the connecting mandrel comprises a ball head arranged on the upper end part and a lower port flange arranged on the lower end part, wherein the ball head is positioned in the damping cylinder body, the elastic body is filled with the ball head and a closed space in the damping cylinder body, through holes are formed in the upper plane and the lower plane of the damping cylinder body, the diameters of the through holes are smaller than those of the ball head of the connecting mandrel, and the lower port flange of the connecting mandrel extends out of the lower plane of the damping cylinder body. The shock absorber can resist large torque and prevent rotation, can bear larger high-frequency axial pushing force and pulling force, has a service life which is greatly prolonged and the safety is greatly improved compared with the existing shock absorbers on the market.
Description
Technical Field
The invention belongs to the field of compaction engineering of various soft soil, and particularly relates to a novel shock absorber for various vibroflotation devices and a preparation process thereof.
Background
The vibration damper of the existing compaction pile is a fine tooth wrapped rubber damper, and the lower part of the damper is in a flange screw connection mode. This form of shock absorber has the following disadvantages in use:
1. the contact area of the fine teeth and the rubber elastic body is small, the elastic body is easy to tear along the warp direction under the condition of large torque, and the torsion resistance is poor;
2. when the vibroflotation device is used for pile forming in the gravel layer, the recoil force is large, and the fine teeth are caused to longitudinally cut the rubber elastomer, so that the elastomer is crushed along the axial direction, and the axial thrust resistance and the tensile resistance are poor, thereby reducing the damping effect;
3. because the lower part of the shock absorber is fixedly connected with the flange screw, the fastening screw is easy to loosen under the periodic high-frequency vibration of the vibroflotation device; the result of loosening the fastening screw is that the screw slowly drops off, the flange is separated from the shock absorber, and the vibrator can drop into the pile hole when serious; in addition, the electrified cable is broken in the falling process, and unexpected electric shock accidents are caused.
In summary, the existing shock absorber has short service life, high replacement cost and great potential safety hazard in the use process.
Disclosure of Invention
The invention aims to overcome the defects of the technology, thereby providing the shock absorber for the vibroflotation with more reliable performance.
The technical scheme adopted by the invention is as follows:
the novel shock absorber comprises a shock absorption cylinder body, a connecting mandrel and an elastic body, wherein the connecting mandrel is partially arranged in the shock absorption cylinder body, the elastic body is arranged between the shock absorption cylinder body and the connecting mandrel, and the connecting mandrel is fixed in the shock absorption cylinder body through the elastic body; the connecting mandrel comprises a ball head arranged on the upper end part and a lower port flange arranged on the lower end part, wherein the ball head is positioned in the damping cylinder body, the elastic body is filled with the ball head and a closed space in the damping cylinder body, through holes are formed in the upper plane and the lower plane of the damping cylinder body, the diameters of the through holes are smaller than those of the ball head of the connecting mandrel, and the lower port flange of the connecting mandrel extends out of the lower plane of the damping cylinder body.
Preferably, high and low rack type stoppers are uniformly and alternately arranged on the inner wall of the shock absorption cylinder body along the longitudinal direction, and the depth of the Gao Chitiao type stoppers exceeds half of the distance between the inner wall of the shock absorption cylinder body and the outer wall of the connecting mandrel. Further, the same high-low equal-length racks are uniformly arranged on the inner wall of the shock absorption cylinder body. The inner wall of the damping cylinder adopts a high-low rack type structure, so that the torsion resistance of the elastomer under the condition of large torque is increased, the elastomer is prevented from being separated from the inner wall of the damping cylinder and rotating, and the damping effect is lost; meanwhile, the contact area between the high and low rack type stop blocks and the elastic body is increased, so that the possibility of tearing the elastic body is reduced, and the service life of the elastic body is prolonged.
Preferably, the ball head is of a hyperboloid structure and comprises an upper curved surface and a lower curved surface which are symmetrically arranged, and the upper curved surface and the lower curved surface are separated by a certain distance in the length direction of the connecting mandrel. The hyperboloid ball head is adopted to connect the mandrel, so that the axial contact area of the connecting mandrel and the elastic body is increased, the pressure intensity of the axial stress surface of the elastic body is effectively reduced, and great benefits are provided for maintaining the elasticity of the elastic body.
More preferably, the hyperboloid on the ball head is arranged in a radial spline mode, so that the contact area is larger, the contact force is stronger, and the elasticity of the elastic body is better maintained.
Preferably, the damping cylinder is of a unitary structure. Compared with the split structure in the prior art, the damping cylinder body with the integral closed structure can effectively prevent the falling accident of the vibrator caused by the crushing failure of the elastomer. Compared with the shock absorber with the same technical specification, the shock absorber in the form is more compact in structure, better in torsion resistance and tensile (pushing) performance, stronger in shock absorbing capacity and higher in universality.
Preferably, the upper plane of the shock absorption cylinder body is fixedly connected with the guide rod flange, and the lower port flange of the connecting mandrel is fixedly connected with the upper flange of the vibroflotation device.
More preferably, the upper plane of the shock absorption cylinder body is fixedly connected with the guide rod flange by a screw, and the lower port flange of the hyperboloid ball head connecting mandrel is fixedly connected with the upper flange of the vibroflotation device by a screw.
Preferably, the material of the elastomer is polyurethane. Polyurethane is used as an elastomer which is filled in the closed space and is made of special materials, and compared with rubber, the elastomer has larger shock absorption and shock insulation functions and surface adhesive force;
preferably, the connecting mandrel is fixed on the outer wall of the part in the shock absorption cylinder, long-tooth check blocks are uniformly arranged along the longitudinal direction except for the hyperboloid ball head structure, and the depth of the long-tooth check blocks and the depth of the high-rack check blocks on the inner wall of the shock absorption cylinder are both more than half of the distance between the inner wall of the shock absorption cylinder and the outer wall of the connecting mandrel.
The invention also discloses a preparation process of the shock absorber, which comprises the following steps:
(1) The production process of the connecting mandrel comprises the following steps: 1) Integral forgings; 2) Respectively machining a center hole, a ball head spherical surface and a lower port flange by turning, milling and drilling;
(2) The production process of the damping cylinder body comprises the following steps: 1) The damping cylinder body is processed in a sectional position according to the upper part of the cylinder body, the middle part of the cylinder body and the lower part of the cylinder body with the bottom plate, which are connected with the guide rod, and then the middle part of the cylinder body and the lower part of the cylinder body are welded, and sundries are cleaned; 2) After the lower part of the cylinder body is welded with the middle part of the cylinder body, a connecting mandrel is inserted into the cylinder body, and then the upper part of the cylinder body is welded to complete the integral forming of the damping cylinder body;
(3) Casting and forming: 1) Positioning the connecting mandrel by using the positioning mandrel; 2) After the whole body is heated, liquefying polyurethane and casting so as to fill a closed space between the shock absorption cylinder body and the connecting mandrel; 3) And cooling and taking out the positioning mandrel.
Preferably, in the step (1), the integral forging may be processed by inspection.
Preferably, in the step (2), after all welds pass the flaw detection, the welds can enter an elastomer casting process.
Preferably, in the step (2), the long tooth stop blocks and the Gao Chitiao stop blocks are ensured to be staggered when being inserted.
By adopting the technical scheme, the invention has the beneficial effects that: the connecting mandrel is provided with a ball head structure, so that the connecting mandrel can bear larger axial pushing force and pulling force with high frequency, and has better effect when in particular to a hyperboloid ball head; polyurethane is used as an elastomer which is filled in the closed space and is made of special materials, and compared with rubber, the elastomer has larger shock absorption and shock insulation functions and surface adhesive force; the low racks uniformly distributed in the damping cylinder body mainly play a role in increasing the adhesion force of the elastic body, the high racks mainly play a role in resisting force, and the rotation angle of the connecting mandrel with the ball head is reduced, so that the problem that the elastic body is damaged due to the fact that the elastic body is cut by the fine teeth which are commonly used in the conventional damping cylinder body under the strong torsion is completely avoided, and the purpose-made damping cylinder body can ensure that the shock absorber is not separated from the vibroflotation device even if the elastic body is completely damaged or fails, and is very high in safety.
By adopting the technical scheme, the invention has the following additional beneficial effects: the shock absorber replacement frequency and maintenance replacement time are reduced, and the use cost is greatly reduced under the condition of improving the production efficiency.
By adopting the technical scheme, the third beneficial effect of the invention is as follows: the production process is simplified, the use of large-scale vulcanization molding equipment and casting equipment is omitted, the production period is shortened, and the manufacturing cost is correspondingly reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a cross-sectional view taken along the middle portion of the ball head in fig. 1.
Detailed Description
The present invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1 and 2, the novel shock absorber comprises a shock absorbing cylinder body 1, a connecting mandrel 3 partially arranged in the shock absorbing cylinder body 1 and an elastic body 2 arranged between the shock absorbing cylinder body 1 and the connecting mandrel 3, wherein the connecting mandrel 3 is fixed in the shock absorbing cylinder body 1 through the elastic body 2; the connecting mandrel 3 comprises a ball head 4 arranged on the upper end part and a lower port flange 5 arranged on the lower end part, the ball head 4 is positioned in the shock absorption barrel 1, the elastic body 2 is filled with the ball head 4 and a closed space in the shock absorption barrel 1, through holes 6 are formed in the upper plane and the lower plane of the shock absorption barrel 1, the diameter of each through hole 6 is smaller than that of the ball head 4 of the connecting mandrel, and the lower port flange 5 of the connecting mandrel 3 stretches out of the lower plane of the shock absorption barrel 1.
The high and low rack type stoppers 1.1 and 1.2 are uniformly and alternately arranged on the inner wall of the shock absorption cylinder body 1 along the longitudinal direction, and the depth of the Gao Chitiao type stopper 1.1 exceeds half of the distance between the inner wall of the shock absorption cylinder body 1 and the outer wall of the connecting mandrel 3. The inner wall of the shock absorption cylinder body 1 is uniformly provided with the racks with the same height and equal length. The inner wall of the damping cylinder adopts a high-low rack type structure, so that the torsion resistance of the elastomer under the condition of large torque is increased, the elastomer is prevented from being separated from the inner wall of the damping cylinder and rotating, and the damping effect is lost; meanwhile, the contact area between the high and low rack type stop blocks and the elastic body is increased, so that the possibility of tearing the elastic body is reduced, and the service life of the elastic body is prolonged.
The ball head 4 is of a hyperboloid structure and comprises an upper curved surface 4.1 and a lower curved surface 4.2 which are symmetrically arranged, and a certain distance is reserved between the upper curved surface 4.1 and the lower curved surface 4.2 in the length direction of the connecting mandrel 3. The hyperboloid ball head is adopted to connect the mandrel, so that the axial contact area of the connecting mandrel and the elastic body is increased, the pressure intensity of the axial stress surface of the elastic body is effectively reduced, and great benefits are provided for maintaining the elasticity of the elastic body.
The hyperboloid on the ball head 4 is arranged in a radial spline mode, and is particularly arranged in a plum blossom mode.
The damping cylinder body 1 is of a unitary structure. Compared with the split structure in the prior art, the damping cylinder body with the integral closed structure can effectively prevent the falling accident of the vibrator caused by the crushing failure of the elastomer. Compared with the shock absorber with the same technical specification, the shock absorber in the form is more compact in structure, better in torsion resistance and tensile (pushing) performance, stronger in shock absorbing capacity and higher in universality.
The upper plane of the shock absorption cylinder body 1 is fixedly connected with a guide rod flange by using screws, and the lower port flange 5 of the connecting mandrel 3 is fixedly connected with the upper flange of the vibroflotation device by using screws.
The elastomer 2 is made of polyurethane. Polyurethane is used as an elastomer which is filled in the closed space and is made of special materials, and compared with rubber, the elastomer has larger shock absorption and shock insulation functions and surface adhesive force;
the connecting mandrel 3 is fixed on the outer wall of the part in the shock absorption cylinder 1, long-tooth stop blocks 3.1 are also uniformly arranged along the longitudinal direction except for the hyperboloid ball head 4 structure, and the depth of each long-tooth stop block 3.1 exceeds half of the distance between the inner wall of the shock absorption cylinder 1 and the outer wall of the connecting mandrel 3.
The preparation process of the shock absorber comprises the following steps:
(1) The production process of the connecting mandrel comprises the following steps: 1) Integral forgings; 2) Respectively machining a center hole, a ball head spherical surface and a lower port flange by turning, milling and drilling;
(2) The production process of the damping cylinder body comprises the following steps: 1) The damping cylinder body is processed in a sectional position according to the upper part of the cylinder body, the middle part of the cylinder body and the lower part of the cylinder body with the bottom plate, which are connected with the guide rod, and then the middle part of the cylinder body and the lower part of the cylinder body are welded, and sundries are cleaned; 2) After the lower part of the cylinder body is welded with the middle part of the cylinder body, a connecting mandrel is inserted into the cylinder body, and then the upper part of the cylinder body is welded to complete the integral forming of the damping cylinder body;
(3) Casting and forming: 1) Positioning the connecting mandrel by using the positioning mandrel; 2) After the whole body is heated, liquefying polyurethane and casting so as to fill a closed space between the shock absorption cylinder body and the connecting mandrel; 3) And cooling and taking out the positioning mandrel.
In the step (1), the integral forging can be processed after passing the flaw detection.
In the step (2), all welding seams can enter an elastomer casting procedure after passing flaw detection.
In the step (2), when the long-tooth stop blocks and the Gao Chitiao stop blocks are inserted, the long-tooth stop blocks and the Gao Chitiao stop blocks are ensured to be placed in a staggered mode.
By adopting the technical scheme, the invention has the beneficial effects that: the connecting mandrel is provided with a ball head structure, so that the connecting mandrel can bear larger axial pushing force and pulling force with high frequency, and has better effect when in particular to a hyperboloid ball head; polyurethane is used as an elastomer which is filled in the closed space and is made of special materials, and compared with rubber, the elastomer has larger shock absorption and shock insulation functions and surface adhesive force; the low racks uniformly distributed in the damping cylinder body mainly play a role in increasing the adhesion force of the elastic body, the high racks mainly play a role in resisting force, and the rotation angle of the connecting mandrel with the ball head is reduced, so that the problem that the elastic body is damaged due to the fact that the elastic body is cut by the fine teeth which are commonly used in the conventional damping cylinder body under the strong torsion is completely avoided, and the purpose-made damping cylinder body can ensure that the shock absorber is not separated from the vibroflotation device even if the elastic body is completely damaged or fails, and is very high in safety.
By adopting the technical scheme, the invention has the following additional beneficial effects: the shock absorber replacement frequency and maintenance replacement time are reduced, and the use cost is greatly reduced under the condition of improving the production efficiency.
By adopting the technical scheme, the third beneficial effect of the invention is as follows: the production process is simplified, the use of large-scale vulcanization molding equipment and casting equipment is omitted, the production period is shortened, and the manufacturing cost is correspondingly reduced.
While the basic principles and main features of the present invention and advantages thereof have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described merely by way of illustration of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (4)
1. The novel shock absorber comprises a shock absorption cylinder body, a connecting mandrel and an elastic body, wherein the connecting mandrel is partially arranged in the shock absorption cylinder body, the elastic body is arranged between the shock absorption cylinder body and the connecting mandrel, and the connecting mandrel is fixed in the shock absorption cylinder body through the elastic body; the connecting mandrel comprises a ball head arranged at the upper end part and a lower port flange arranged at the lower end part, the ball head is positioned in the shock absorption cylinder body, the elastic body fills the ball head and the airtight space in the shock absorption cylinder body, through holes are formed in the upper plane and the lower plane of the shock absorption cylinder body, the diameters of the through holes are smaller than those of the ball head of the connecting mandrel, and the lower port flange of the connecting mandrel extends out of the lower plane of the shock absorption cylinder body;
the high rack type stop blocks and the low rack type stop blocks are uniformly and alternately arranged on the inner wall of the shock absorption cylinder body along the longitudinal direction, and the depth of each Gao Chitiao type stop block exceeds half of the distance between the inner wall of the shock absorption cylinder body and the outer wall of the connecting mandrel;
the ball head is of a hyperboloid structure and comprises an upper curved surface and a lower curved surface which are symmetrically arranged, and a certain distance is reserved between the upper curved surface and the lower curved surface in the length direction of the connecting mandrel;
the elastomer is made of polyurethane;
hyperboloid on the said ball head is radial spline type to arrange;
the damping cylinder body is of an integral structure;
the connecting mandrel is fixed on the outer wall of the part in the shock absorption cylinder body, long-tooth check blocks are uniformly arranged along the longitudinal direction except for the hyperboloid ball head structure, and the depth of the long-tooth check blocks exceeds half of the distance between the inner wall of the shock absorption cylinder body and the outer wall of the connecting mandrel.
2. The shock absorber of claim 1 wherein the upper plane of the shock absorbing cylinder is fixedly connected to the guide rod flange and the lower port flange of the connecting mandrel is fixedly connected to the upper flange of the vibroflotation device.
3. The process for preparing a shock absorber according to claim 1, comprising the steps of:
(1) The production process of the connecting mandrel comprises the following steps: 1) Integral forgings; 2) Processing a central hole, a ball spherical surface and a lower port flange;
(2) The production process of the damping cylinder body comprises the following steps: 1) The damping cylinder body is processed in a sectional position according to the upper part of the cylinder body, the middle part of the cylinder body and the lower part of the cylinder body with the bottom plate, which are connected with the guide rod, and then the middle part of the cylinder body and the lower part of the cylinder body are welded; 2) After the lower part of the cylinder body is welded with the middle part of the cylinder body, a connecting mandrel is inserted into the cylinder body, and then the upper part of the cylinder body is welded to complete the integral forming of the damping cylinder body;
(3) Casting and forming: 1) Positioning the connecting mandrel by using the positioning mandrel; 2) After the whole body is heated, liquefying polyurethane and casting so as to fill a closed space between the shock absorption cylinder body and the connecting mandrel; 3) And cooling and taking out the positioning mandrel.
4. The process for manufacturing a shock absorber according to claim 3, wherein in the step (1), the integral forging is processed by inspection; in the step (2), all welding seams can enter an elastomer casting procedure after passing flaw detection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749970.5A CN107448534B (en) | 2017-08-28 | 2017-08-28 | Novel shock absorber and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710749970.5A CN107448534B (en) | 2017-08-28 | 2017-08-28 | Novel shock absorber and preparation process thereof |
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| CN107448534A CN107448534A (en) | 2017-12-08 |
| CN107448534B true CN107448534B (en) | 2023-09-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561479A (en) * | 2018-02-05 | 2018-09-21 | 许文红 | A kind of damping device of tilling machine |
| CN110030307A (en) * | 2019-03-05 | 2019-07-19 | 中国航发北京航空材料研究院 | A kind of Anti-pull-press high rigidity cylinder type damper |
| CN116695675B (en) * | 2023-06-21 | 2024-04-02 | 中电建振冲建设工程股份有限公司 | Guide rod shock absorber of vibroflotation device |
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| CN203532620U (en) * | 2013-09-24 | 2014-04-09 | 中国船舶重工集团公司第七一〇研究所 | Rotary impact resistance damping mechanism |
| CN104832581A (en) * | 2014-12-13 | 2015-08-12 | 中国煤炭科工集团太原研究院有限公司 | Concave and convex spline type tubular rubber shock absorber with interval expansion variable layer |
| CN207131783U (en) * | 2017-08-28 | 2018-03-23 | 江阴市军炫智能装备有限公司 | Shock damper |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2358225A1 (en) * | 1973-11-22 | 1975-07-31 | Metzeler Gummitechnik | Plastics bushing for non-lubricated joints, esp. in motor vehicles - which is positively keyed to supporting elastomer sleeve by ribs or knobs |
| CN1654846A (en) * | 2004-02-12 | 2005-08-17 | 东海橡胶工业株式会社 | Vibration-damping device |
| CN102788108A (en) * | 2012-08-02 | 2012-11-21 | 中国船舶重工集团公司第七○二研究所 | Elastic spline vibration isolator |
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