CN1661259A - Differential dynamic pressure feedback unit of anti impactive and vibration proof in use for large-volume equipment - Google Patents
Differential dynamic pressure feedback unit of anti impactive and vibration proof in use for large-volume equipment Download PDFInfo
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- CN1661259A CN1661259A CN 200410021179 CN200410021179A CN1661259A CN 1661259 A CN1661259 A CN 1661259A CN 200410021179 CN200410021179 CN 200410021179 CN 200410021179 A CN200410021179 A CN 200410021179A CN 1661259 A CN1661259 A CN 1661259A
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- dynamic pressure
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Abstract
A feed back of differential dynamic pressure is featured as forming the device by telescoping two sets of pistons, forming high pressure cavity between cylinder and big piston as well as energy storing cavity between big piston and its internal small piston, connecting the two cavities through by one-way valve and variable throttle to let hydraulic oil flow from energy storing cavity to high pressure cavity, setting a spring at opposite side of small piston and reducing throttle section area continuously in following of moving big piston to cylinder bottom.
Description
Technical field:
The present invention relates to buffer technology, a kind of differential dynamic pressure feedback means that is used for the vibration of main equipment protecting against shock is provided especially.
Background technique:
Along with the big industrial development in the world, the equipment manufacture large scale development is just becoming trend, the impact shock problem is a common problem that has the big machinery equipment of impact shock load, it has had a strong impact on the reliability of the big machinery armament-related work that has the impact shock load, not only bring hidden danger, seriously restricted the production domesticization and the application development that have impact shock load big machinery equipment simultaneously to equipment safety operation.The solution of protecting against shock vibration with large-scale rigid construction machinery of impact shock load mainly contains following three kinds: 1. increase structural rigidity; 2. reduce the disturbance load; 3. improve the performance of device structure system.Have the large-scale rigid construction machinery of impact shock load for some, the large-scale vertical tumbling mill in producing as cement produced with the dry method, the structural rigidity of increase equipment certainly will increase considerably weight of equipment, and increases the manufacture cost of equipment, and is uneconomical; If reduce the disturbing influence of equipment, then equipment can not satisfy actual operating mode.Is that impact is avoided, eliminated to the overall structure performance of improving Roller mill systems abroad, avoids vibration to take place, and domestic in this respect research is used seldom, does not see application at present, still belongs to blank what solve that vertical roll grinder impact shock problem adopts.
Technology contents:
The object of the present invention is to provide a kind of differential dynamic pressure feedback means that is used for main equipment protecting against shock vibration, it can be coupling in the big machinery change system that has the impact shock load, has high damping efficiency, and simple in structure, energy consumption is low.
The invention provides a kind of differential dynamic pressure feedback means that is used for the vibration of main equipment protecting against shock, it is characterized in that: described device is made of the piston of the mutual intussusception of two covers, form hyperbaric chamber (9) between cylinder body (3) and the big piston (6), form energy-storing chamber (10) between big piston (6) and its inner small piston (7); One-way valve (1) and settable orifice (4) make hyperbaric chamber (9) be connected with energy-storing chamber (10), one-way valve (1) makes hydraulic oil flow into hyperbaric chamber (9) from energy-storing chamber (10) uniaxially, and the cross section of settable orifice (4) constantly reduces to moving of cylinder body (3) bottom with big piston (6); The side that small piston (7) is relative with energy-storing chamber (10) is provided with spring (8).
The present invention is used for the differential dynamic pressure feedback means of main equipment protecting against shock vibration, preferably satisfies following equation between the area of the head piece (4) of switching political loyalty and the displacement of big piston (6):
f＝f
0(1-X/L
0)
1/2，
In the formula:
The f---choke area,
f
0---restriction maximum area,
L
0---cushion stroke,
The displacement of X---piston.
The present invention is used for the differential dynamic pressure feedback means of main equipment protecting against shock vibration, is provided with throttle valve (2) in addition between hyperbaric chamber (9) and the energy-storing chamber (10).
The present invention is used for the differential dynamic pressure feedback means of main equipment protecting against shock vibration, the outer water jacket (5) that is with of cylinder body (3).
Dynamic pressure feedback means of the present invention is a kind of pressure differentiation element, also claims damping device, is made up of damping, spring, piston accumulator.This is a kind of cheapness, increases the way of load damping reliably and effectively.Has the working principle advanced person, damping efficiency height, simple in structure, low power consumption and other advantages.Can be widely used on the Large-Scale Equipments such as the mine that has impact shock load, building materials, chemical industry, process mechanism.
Description of drawings:
Fig. 1 is the differential dynamic pressure feedback means structural representation of main equipment protecting against shock vibration;
Fig. 2 is for when restriction being cross section fixedly the time, the performance curve of differential dynamic pressure feedback means;
Fig. 3 is for when restriction being cross section when changing with piston displacement, the performance curve of differential dynamic pressure feedback means.
Embodiment:
The differential dynamic pressure feedback means structure of main equipment protecting against shock vibration as shown in Figure 1, piston by the mutual intussusception of two covers constitutes, form hyperbaric chamber (9) between cylinder body (3) and the big piston (6), form energy-storing chamber (10) between big piston (6) and its inner small piston (7); One-way valve (1) and settable orifice (4) make hyperbaric chamber (9) be connected with energy-storing chamber (10), one-way valve (1) makes hydraulic oil flow into hyperbaric chamber (9) from energy-storing chamber (10) uniaxially, and the cross section of settable orifice (4) constantly reduces to moving of cylinder body (3) bottom with big piston (6); The side that small piston (7) is relative with energy-storing chamber (10) is provided with spring (8).Be provided with throttle valve (2) in addition between hyperbaric chamber (9) and the energy-storing chamber (10).The outer water jacket (5) that also is with of cylinder body (3).
Working principle is: the time spent of doing that is subjected to external force F when differential dynamic pressure feedback means, external force F promotes big piston (6) and is moved to the left, simultaneously hyperbaric chamber (9) is exerted pressure, pressure oil in the hyperbaric chamber (9) enters energy-storing chamber (10) by settable orifice (4), energy-storing chamber (10) pressure raises, promoting small piston (7) moves right, pressure spring (stored energy), after external force F disappears, hyperbaric chamber (9) pressure disappears, the pressure of energy-storing chamber (10) will impel the pressure oil in the energy-storing chamber (10) to flow to hyperbaric chamber (9) by one-way valve (1), open settable orifice (4), energy-storing chamber (10) internal pressure oil flows to hyperbaric chamber (9) rapidly, and promotion big piston (6) moves right and resets, impel energy-storing chamber (10) internal pressure and the rapid balance of hyperbaric chamber (9) internal pressure simultaneously, spring (8) resets.When big piston (6) is moved to the left to limit position near cylinder bottom; settable orifice (4) will be closed; the pressure of hyperbaric chamber this moment (9) might sharply raise; for fear of the generation of this phenomenon, between hyperbaric chamber (9) and energy-storing chamber (10), designed the throttle valve (2) that is used for the overflow protection in addition.
In the structural design of the present invention, the Variable Designing Of of restriction is a very the key link.When the cross section of restriction fixedly the time, according to theoretical calculation, the performance curve of differential dynamic pressure feedback means as shown in Figure 2, when the restriction sectional area changed with piston displacement, according to theoretical calculation, the performance curve of differential dynamic pressure feedback means was as shown in Figure 3.
Among the figure:
The f---choke area,
f
0---restriction maximum area,
P---hyperbaric chamber pressure,
L
0---cushion stroke,
The displacement of X---big piston,
The acceleration of a---big piston motion,
V
0---big piston initial velocity,
V---big piston instantaneous velocity,
a
Max---maximum acceleration.
As can be seen, for the damping device of fixed restriction:
(1) speed of big piston reduces rapidly with the increase of cushion stroke, steady state value of convergence, so mechanical shock is inevitable, can reduce residual speed though reduce choke area, has strengthened hydraulic shock.
(2) pressure of hyperbaric chamber reduces rapidly with the increase of cushion stroke, but non-vanishing forever, but steady state value of convergence.
When (3) buffering began, negative acceleration was very big, and hydraulic shock is very big; Acceleration is decayed very soon in the buffering course, even after this add buffer distance to such an extent that longly more also be helpless to improve cushioning effect.
For the damping device of variable restrictor, particularly orifice size f is with the f=f that satisfies of displacement X
0(1-X/L
0)
1/2During determined relation.
(1) because restriction is variable, the pressure of hyperbaric chamber approaches constant.
(2) because the pressure of hyperbaric chamber approaches constantly, piston is done uniform retarded motion in the buffering course.
(3) residual speed of big piston approaches zero.
Claims (5)
1, a kind of differential dynamic pressure feedback means that is used for the vibration of main equipment protecting against shock, it is characterized in that: described device is made of the piston of the mutual intussusception of two covers, form hyperbaric chamber (9) between cylinder body (3) and the big piston (6), form energy-storing chamber (10) between big piston (6) and its inner small piston (7); One-way valve (1) and settable orifice (4) make hyperbaric chamber (9) be connected with energy-storing chamber (10), one-way valve (1) makes hydraulic oil flow into hyperbaric chamber (9) from energy-storing chamber (10) uniaxially, and the cross section of settable orifice (4) constantly reduces to moving of cylinder body (3) bottom with big piston (6); The side that small piston (7) is relative with energy-storing chamber (10) is provided with spring (8).
2, according to the described differential dynamic pressure feedback means that is used for the vibration of main equipment protecting against shock of claim 1, it is characterized in that: satisfy following equation between the displacement of the area of described traitorous head piece (4) and big piston (6):
f＝f
0(1-X/L
0)
1/2，
In the formula:
The f---choke area,
f
0---restriction maximum area,
L
0---cushion stroke,
The displacement of X---piston.
3, according to claim 1 or the 2 described differential dynamic pressure feedback meanss that are used for the vibration of main equipment protecting against shock, it is characterized in that: be provided with throttle valve (2) in addition between described hyperbaric chamber (9) and the energy-storing chamber (10).
4, according to claim 1 or the 2 described differential dynamic pressure feedback meanss that are used for the vibration of main equipment protecting against shock, it is characterized in that: the outer water jacket (5) that is with of cylinder body (3).
5, according to the described differential dynamic pressure feedback means that is used for the vibration of main equipment protecting against shock of claim 3, it is characterized in that: the outer water jacket (5) that is with of cylinder body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100211795A CN100337049C (en) | 2004-02-23 | 2004-02-23 | Differential dynamic pressure feedback unit of anti impactive and vibration proof in use for large-volume equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100211795A CN100337049C (en) | 2004-02-23 | 2004-02-23 | Differential dynamic pressure feedback unit of anti impactive and vibration proof in use for large-volume equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1661259A true CN1661259A (en) | 2005-08-31 |
| CN100337049C CN100337049C (en) | 2007-09-12 |
Family
ID=35010740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100211795A Expired - Fee Related CN100337049C (en) | 2004-02-23 | 2004-02-23 | Differential dynamic pressure feedback unit of anti impactive and vibration proof in use for large-volume equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100337049C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349148B (en) * | 2008-08-13 | 2011-11-23 | 中国海洋石油总公司 | Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| CN101699081B (en) * | 2009-10-23 | 2011-12-28 | 温州市康赛特自动控制阀门有限公司 | Large-torque pneumatic actuator with shock-absorbing limiting device |
| CN103758915A (en) * | 2013-12-30 | 2014-04-30 | 中国人民解放军92537部队 | Scaling type impact-resistant isolation device |
| CN109606969A (en) * | 2018-12-14 | 2019-04-12 | 洛阳理工学院 | a buffer structure |
| CN109780000A (en) * | 2019-01-31 | 2019-05-21 | 中国铁建重工集团有限公司 | A kind of absorbing cylinder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4343428A1 (en) * | 1993-12-18 | 1995-06-22 | Ringsdorff Sinter Gmbh | Injection molded guide and sealing elements on sintered parts for shock absorbers |
| CN2189646Y (en) * | 1994-01-28 | 1995-02-15 | 范伟林 | Double-cylinder type hydraulic tappet in distributting mechanism of internal-combustion engine |
| DE19536902A1 (en) * | 1995-10-04 | 1997-04-10 | Boehringer Ingelheim Int | Miniature fluid pressure generating device |
| CN2292929Y (en) * | 1996-08-23 | 1998-09-30 | 建设部长沙建设机械研究院 | Buffer of plunger oil cylinder for concrete pump |
| JP2001082558A (en) * | 1999-09-09 | 2001-03-27 | Ntn Corp | Chain tensioner |
| JP3866473B2 (en) * | 2000-02-08 | 2007-01-10 | 本田技研工業株式会社 | Cylinder block sleeve structure |
-
2004
- 2004-02-23 CN CNB2004100211795A patent/CN100337049C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349148B (en) * | 2008-08-13 | 2011-11-23 | 中国海洋石油总公司 | Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| CN101699081B (en) * | 2009-10-23 | 2011-12-28 | 温州市康赛特自动控制阀门有限公司 | Large-torque pneumatic actuator with shock-absorbing limiting device |
| CN103758915A (en) * | 2013-12-30 | 2014-04-30 | 中国人民解放军92537部队 | Scaling type impact-resistant isolation device |
| CN103758915B (en) * | 2013-12-30 | 2016-02-17 | 中国人民解放军92537部队 | Proportional zoom type impact-resistant isolation device |
| CN109606969A (en) * | 2018-12-14 | 2019-04-12 | 洛阳理工学院 | a buffer structure |
| CN109780000A (en) * | 2019-01-31 | 2019-05-21 | 中国铁建重工集团有限公司 | A kind of absorbing cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100337049C (en) | 2007-09-12 |
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