CN204327840U - A kind of Multi-stage pressure limiting regulating hydraulic buffer - Google Patents
A kind of Multi-stage pressure limiting regulating hydraulic buffer Download PDFInfo
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- CN204327840U CN204327840U CN201420795329.7U CN201420795329U CN204327840U CN 204327840 U CN204327840 U CN 204327840U CN 201420795329 U CN201420795329 U CN 201420795329U CN 204327840 U CN204327840 U CN 204327840U
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- damping mechanism
- pressure limiting
- cylinder body
- limiting regulating
- buffer
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Abstract
The utility model discloses a kind of Multi-stage pressure limiting regulating hydraulic buffer, comprise the multi-buffer mechanism connected successively from left to right, every grade of damping mechanism includes cylinder body, pressure limiting regulating type relief valve and piston, and pressure limiting regulating type relief valve screw thread is fixed on the left of cylinder body; In adjacent two-stage damping mechanism, the left end being relatively positioned at its cylinder body of damping mechanism on right side seals with the relative right-hand member being positioned at the damping mechanism cylinder body in left side and is socketed, and the cylinder body of right side damping mechanism can relative to the movement of cylinder block of left side damping mechanism using the piston as left side damping mechanism, the pressure limiting regulating type relief valve of high order end damping mechanism is connected with fuel tank by transport pipe, and the cylinder body right-hand member of low order end damping mechanism is threaded with bearing plate.Multi-buffer combines with pressure limiting regulating type relief valve and forms constant damping power Long travel buffer by the utility model, extends cushion stroke and time of collision, ensures that maximum acceleration carries out buffering energy-consumption to greatest extent under being less than design load.
Description
Technical field
The utility model relates to a kind of hydraulic bjuffer, particularly a kind of Multi-stage pressure limiting regulating hydraulic buffer.
Background technique
Car tracing cauda accident often occurs, and the dolly of fast running knocks into the back the truck travelled at a slow speed, and the result of accident often causes the car crash of dolly.Existing vehicle impact buffer can be divided into the energy-consumption shock-absorption devices such as spring buffer, hydraulic cushion, electromagnetic buffer.In order to two cars making high speed close steadily release energy, the resistance of needs is not only wanted greatly, the endurance is long, and needs resistance stable, controlled, not by the impact of velocity variations.
Viscous damper is widely used in building structure and bridge structure carries out passive energy dissipation, and its damping force is large.The structure of viscous damper generally adopts shearing valve type, and as shown in Figure 1, in figure, 101 is cylinder body, and 102 is piston, and 103 is viscous fluids, and 104 is piston rod, and 105 is throttle orifice.
In a stroke interval T of car crash: W=Fs, wherein F is average damping force, a stroke of damper when s is car crash.The size of damping force F with piston movement speed variation relation can approximate representation be: F=cv
α, wherein c is damper coefficient of viscosity, relevant with the ratio that size and the piston cross-section of throttle orifice on piston amass; V is the relative velocity of piston rod and damper movement of cylinder block, and generally, 0< α≤1, be an important performance indexes of viscous damper, index α is less, and a stroke internal damping power change of car crash is less.
In automobile collision procedure, the relation of damping force and acceleration obeys Newton's second law: F=ma, wherein, m is dolly quality, a is dolly acceleration (assuming that large vehicle speed is constant) in collision, have research to think, the maximum instantaneous acceleration that ordinary people can bear is 5g, g=9.8m/s
2for gravity accleration.Knock into the back in process at dolly, between its acceleration, velocity variable, damper stroke, pass is: 2as=Δ v
2, wherein, a stroke of damper when s is car crash, a is dolly acceleration, assuming that dolly knocks into the back in process, speed reduces to 80km/h by 120km/h, Δ v=40km/h ≈ 11.1m/s, if setting a=4g, by formula 2as=Δ v
2a stroke s=1.5m of damper during car crash can be obtained; It can thus be appreciated that s is larger, more favourable to reduction acceleration, but manufacture processing technique and the limited restriction of installing space by existing machinery, damper cylinder body can not be oversize, and thus, multi-stage buffer has become best selection.How to reduce the index α value of every one-level internal damping power, and between not at the same level, ensure that damping force keeps a constant substantially, namely in the whole collision process of rear-end collision, maximum acceleration keeps a constant substantially, this is the key of buffering.For existing viscous damper, it is close to 1, and damping force is approximated to direct ratio with speed, and this will cause collision initial stage acceleration large, and later stage power consumption is not enough.Just because of above-mentioned reason, current truck afterbody does not install damping device, and its baffle plate installed additional can not avoid the miserable office of car crash substantially.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides that a kind of structure is simple, reaction fast, the Multi-stage pressure limiting regulating hydraulic buffer of reliable operation, good buffer effect.
The technological scheme that the utility model solves the problem is: a kind of Multi-stage pressure limiting regulating hydraulic buffer, comprise the multi-buffer mechanism connected successively from left to right, every grade of damping mechanism includes cylinder body, pressure limiting regulating type relief valve and piston, and pressure limiting regulating type relief valve screw thread is fixed on the left of cylinder body; In adjacent two-stage damping mechanism, the left end being relatively positioned at its cylinder body of damping mechanism on right side seals with the relative right-hand member being positioned at the damping mechanism cylinder body in left side and is socketed, and the cylinder body of right side damping mechanism can relative to the movement of cylinder block of left side damping mechanism using the piston as left side damping mechanism, the pressure limiting regulating type relief valve of high order end damping mechanism is connected with fuel tank by transport pipe, and the cylinder body right-hand member of low order end damping mechanism is threaded with bearing plate.
In above-mentioned Multi-stage pressure limiting regulating hydraulic buffer, in adjacent two-stage damping mechanism, its inboard wall of cylinder block of the damping mechanism in left side is provided with sealing seat, seal ring, end cap from left to right successively, and described end cap is threaded with the inboard wall of cylinder block of left side damping mechanism.
In above-mentioned Multi-stage pressure limiting regulating hydraulic buffer, the cylinder body left end outer wall of described right side damping mechanism is provided with lead ring, and lead ring is threaded with outer wall of cylinder block, and the inboard wall of cylinder block Spielpassung of lead ring and left side damping mechanism, lead ring is provided with discharge orifice.
In above-mentioned Multi-stage pressure limiting regulating hydraulic buffer, in described multi-buffer mechanism, the diameter of section of each damping mechanism cylinder body reduces successively from left to right.
In above-mentioned Multi-stage pressure limiting regulating hydraulic buffer, described pressure limiting regulating type relief valve comprises valve body, spool, spring, adjusting nut and throttle orifice, described valve body is left side open semi closed shape, valve body right side wall has axial throttle orifice, described spool is installed in valve body near throttle orifice, is provided with oil hole in the middle part of spool, and the right-hand member of described spring is connected with spool, spring left end is connected with adjusting nut, and described adjusting nut to be placed in valve body and to be connected with valve body screw thread.
The beneficial effects of the utility model are:
1, multi-buffer combines with pressure limiting regulating type relief valve and forms constant damping power Long travel buffer by the utility model, extends cushion stroke and time of collision, ensures that maximum acceleration carries out buffering energy-consumption to greatest extent under being less than design load;
2, the damping force of the utility model damping mechanism at different levels is adjustable, and damping force stable and uniform during compression, substantially not with velocity variations;
3, when collision occurs, the damping force of damping mechanism at different levels adjusts rapidly automatically, and reaction is fast, does not disturb by other factors;
4, the utility model arranges oil hole in the middle part of spool, the use of fitted bolt, can carry out filled fluid and sealing with high-pressure oil gun to damping mechanism.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing viscous damper.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the structural drawing of pressure limiting regulating type relief valve in Fig. 2.
Fig. 4 is the sectional structure chart of spool in Fig. 3.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 2, the utility model comprises the level Four damping mechanism connected successively from left to right, every one-level damping mechanism of first three grade of damping mechanism comprises cylinder body, pressure limiting regulating type relief valve 3, sealing seat 8, seal ring 9 and end cap 10, and wherein the second damping mechanism, third level damping mechanism also comprise lead ring 6; Fourth stage damping mechanism comprises the 4th cylinder body 15, plug screw, screw rod, bearing plate 16 and lead ring 6.
The diameter of section of each damping mechanism cylinder body reduces successively from left to right, 4th cylinder body 15 left end is threaded with plug screw 14, 4th cylinder body 15 left end outer wall is provided with lead ring 6, lead ring 6 is connected with the 4th cylinder body 15 outer wall thread, lead ring 6 and the 3rd cylinder body 12 inwall Spielpassung, lead ring 6 is provided with discharge orifice 7, 4th cylinder body 15 left end and the 3rd cylinder body 12 right-hand member are sealed and is socketed, then from right-hand member by sealing seat 8, seal ring 9, end cap 10 is successively from the 3rd cylinder body 12 right-hand member press-in, end cap 10 is connected with the 3rd cylinder body 12 inner thread, 4th cylinder body 15 can move relative to the 3rd cylinder body 12 using the piston as the 3rd cylinder body 12.Connect the second cylinder body 11 and the first cylinder body 4 in the same way successively, last 4th cylinder body 15 right-hand member is threaded with bearing plate 16, and the pressure limiting regulating type relief valve 3 of the first damping mechanism is connected with fuel tank 1 by transport pipe 2.
As shown in Figure 3, described pressure limiting regulating type relief valve 3 comprises valve body 21, spool 22, spring 20, adjusting nut 19 and throttle orifice 18, described valve body 21 is in left side open semi closed shape, valve body 21 right side wall has axial throttle orifice 18, described spool 22 is installed in valve body 21 near throttle orifice 18, as shown in Figure 4, oil hole 17 is provided with in the middle part of spool 22, the right-hand member of described spring 20 is connected with spool 22, spring 20 left end is connected with adjusting nut 19, and described adjusting nut 19 to be placed in valve body 21 and to be threaded with valve body 21.
Because the throttle orifice 18 of pressure limiting regulating type relief valve 3 is large, damping force is mainly put to death in spring 20 precompression.At buffer by compression process, if the pressure difference of first, second and third grade of damping mechanism both sides is respectively: Δ P
1, Δ P
2, Δ P
3, as shown in Figure 2, design damping force is F to buffer cylinder body outside diameter at different levels.Employing waits wallop method pre-pressure of the spring, and concrete grammar is as follows:
According to designing requirement, can first determine cylinder size at different levels; Substitution formula (a) (b) (c), can obtain Δ P successively
1, Δ P
2, Δ P
3design load; By rotating adjusting nut 19 Compress Spring 20, the pressure reduction at different levels needed can be obtained easily.Formula (a) (b) (c) is adjusted, can ensure that buffer is at different levels and be compressed successively in order.
Working principle of the present utility model is as follows: when bearing plate 16 is hit, 3rd cylinder body 12 inner fluid pressure increases, when in itself and the second cylinder body 11, pressure difference exceedes limit value, the spring 20 of the pressure limiting regulating type relief valve 3 of third level damping mechanism is compressed, and fluid enters the second cylinder body 11 from the 3rd cylinder body 12 gap flow through between spool 22 and valve body 21; Second cylinder body 11 inner fluid pressure increases, when in itself and the first cylinder body 4, pressure difference exceedes limit value, the spring 20 of the pressure limiting regulating type relief valve 3 of second level damping mechanism is compressed, and fluid enters the first cylinder body 4 from the second cylinder body 11 gap flow through between spool 22 and valve body 21; First cylinder body 4 inner fluid pressure increase, when it and barometric pressure pressure difference exceedes limit value time, the spring 20 of the pressure limiting regulating type relief valve 3 of second level damping mechanism is compressed, and fluid enters fuel tank 1 from the first cylinder body 4 gap flow through between spool 22 and valve body 21.Obtained every one-level damping force curve α ≈ 0.13 of pressure limiting adjustment type buffer by prototype test, damping force hysteresis loop is approximately rectangle.
Claims (5)
1. a Multi-stage pressure limiting regulating hydraulic buffer, it is characterized in that: comprise the multi-buffer mechanism connected successively from left to right, every grade of damping mechanism includes cylinder body, pressure limiting regulating type relief valve and piston, and pressure limiting regulating type relief valve screw thread is fixed on the left of cylinder body; In adjacent two-stage damping mechanism, the left end being relatively positioned at its cylinder body of damping mechanism on right side seals with the relative right-hand member being positioned at the damping mechanism cylinder body in left side and is socketed, and the cylinder body of right side damping mechanism can relative to the movement of cylinder block of left side damping mechanism using the piston as left side damping mechanism, the pressure limiting regulating type relief valve of high order end damping mechanism is connected with fuel tank by transport pipe, and the cylinder body right-hand member of low order end damping mechanism is threaded with bearing plate.
2. Multi-stage pressure limiting regulating hydraulic buffer as claimed in claim 1, it is characterized in that: in adjacent two-stage damping mechanism, its inboard wall of cylinder block of damping mechanism in left side is provided with sealing seat, seal ring, end cap from left to right successively, and described end cap is threaded with the inboard wall of cylinder block of left side damping mechanism.
3. Multi-stage pressure limiting regulating hydraulic buffer as claimed in claim 2, it is characterized in that: the cylinder body left end outer wall of described right side damping mechanism is provided with lead ring, lead ring is threaded with outer wall of cylinder block, and the inboard wall of cylinder block Spielpassung of lead ring and left side damping mechanism, lead ring is provided with discharge orifice.
4. Multi-stage pressure limiting regulating hydraulic buffer as claimed in claim 2, it is characterized in that: in described multi-buffer mechanism, the diameter of section of each buffer cylinder body reduces successively from left to right.
5. Multi-stage pressure limiting regulating hydraulic buffer as claimed in claim 1, it is characterized in that: described pressure limiting regulating type relief valve comprises valve body, spool, spring, adjusting nut and throttle orifice, described valve body is left side open semi closed shape, valve body right side wall has axial throttle orifice, described spool is installed in valve body near throttle orifice, oil hole is provided with in the middle part of spool, the right-hand member of described spring is connected with spool, spring left end is connected with adjusting nut, and described adjusting nut to be placed in valve body and to be connected with valve body screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795329.7U CN204327840U (en) | 2014-12-15 | 2014-12-15 | A kind of Multi-stage pressure limiting regulating hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795329.7U CN204327840U (en) | 2014-12-15 | 2014-12-15 | A kind of Multi-stage pressure limiting regulating hydraulic buffer |
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| Publication Number | Publication Date |
|---|---|
| CN204327840U true CN204327840U (en) | 2015-05-13 |
Family
ID=53164207
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420795329.7U Expired - Fee Related CN204327840U (en) | 2014-12-15 | 2014-12-15 | A kind of Multi-stage pressure limiting regulating hydraulic buffer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455172A (en) * | 2014-12-15 | 2015-03-25 | 湖南科技大学 | Multistage pressure-limiting adjusting hydraulic buffer |
| CN105972138A (en) * | 2016-06-16 | 2016-09-28 | 江苏大学 | Two-stage pressure-type hydro-pneumatic spring and working method thereof |
| CN105970802A (en) * | 2016-06-29 | 2016-09-28 | 湖南科技大学 | Displacement type multistage hydraulic energy absorption and consumption device capable of being switched on automatically |
| CN107061119A (en) * | 2016-12-28 | 2017-08-18 | 浙江海洋大学 | Can the purse seine of seawave power generation cast net ship |
| CN115451055A (en) * | 2022-08-22 | 2022-12-09 | 辽宁机电职业技术学院 | Oil-gas mixing shock absorber |
-
2014
- 2014-12-15 CN CN201420795329.7U patent/CN204327840U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455172A (en) * | 2014-12-15 | 2015-03-25 | 湖南科技大学 | Multistage pressure-limiting adjusting hydraulic buffer |
| CN105972138A (en) * | 2016-06-16 | 2016-09-28 | 江苏大学 | Two-stage pressure-type hydro-pneumatic spring and working method thereof |
| CN105972138B (en) * | 2016-06-16 | 2017-12-05 | 江苏大学 | A kind of two-stage pressure type hydro-pneumatic spring and its method of work |
| CN105970802A (en) * | 2016-06-29 | 2016-09-28 | 湖南科技大学 | Displacement type multistage hydraulic energy absorption and consumption device capable of being switched on automatically |
| CN105970802B (en) * | 2016-06-29 | 2017-09-05 | 湖南科技大学 | Energy consumer is inhaled from displacement type multi-stage water power is opened |
| CN107061119A (en) * | 2016-12-28 | 2017-08-18 | 浙江海洋大学 | Can the purse seine of seawave power generation cast net ship |
| CN115451055A (en) * | 2022-08-22 | 2022-12-09 | 辽宁机电职业技术学院 | Oil-gas mixing shock absorber |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20161215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |