CN203560206U - Adjustable pressure measuring damping device based on principles of damping and differential motion - Google Patents
Adjustable pressure measuring damping device based on principles of damping and differential motion Download PDFInfo
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- CN203560206U CN203560206U CN201320606569.3U CN201320606569U CN203560206U CN 203560206 U CN203560206 U CN 203560206U CN 201320606569 U CN201320606569 U CN 201320606569U CN 203560206 U CN203560206 U CN 203560206U
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Abstract
The utility model relates to an adjustable pressure measuring damping device based on the principles of damping and differential motion. The damping device comprises an adjustable damper, a buffering component, and an auxiliary buffer arranged on the buffering component, wherein the buffering component comprises a front end cover, a back end cover, a cylinder barrel, a piston rod, and a piston; the main piston moves inside the cylinder barrel; the piston rod and the piston are in threaded connection into a whole; the auxiliary buffer comprises a piston, a spring and an adjustable end cover. The damping device provided by the utility model has the following advantages: 1) the overall structure is compact, thus the adjustment is convenient; 2) when a system is subjected to pressure impact, the damping device adopting the technical scheme can effectively filter and reduce a pressure impulse value at the pressure detection point, so as to protect a pressure detection component from damage; 3) the damping device adopting the technical scheme effectively reduces the specification and the size of hydraulic control equipment, so that integration and miniaturization can be realized more easily.
Description
Technical field
The utility model relates to a kind of damping device, relates in particular to one and has damping and can be in harmonious proportion automatically reset pressure measurement damping device, belongs to the technical field of hydraulic equipment.
Background technique
Along with the development of technology, the pressure detecting element of hydraulic system constantly promotes and develops from pressure gauge, pressure relay, pressure transmitter, and the precision to Pressure testing and the life and reliability of load cell are also more and more higher.The pressure-measuring point that has higher transmission inertia, low-frequency high-voltage impact for some, existing pressure measurement buffering method often needs to design complicated structure load cell is protected, otherwise very easily causes the damage of element, causes afunction or leak to occur.Hydraulic system pressure measurement buffering has a lot of modes, for different operating modes, can select different structures.Common generally having installed throttle valve, installed damping energy storage device additional before load cell, low pressure dither system adopts the measures such as disk-shaped tube.In prior art, disclosed damping device has relates to complex structure, and cost is higher, and what have is comparatively simple, but easily causes the damage of element, and therefore, a kind of new damping device of exigence solves above-mentioned technical problem.
Model utility content
The utility model is just for the technical problem existing in prior art; provide one to have that buffering is adjustable, pressure overshoot is low, automatic absorption pressure pulsation, auto-reset function, installation connect damping device easily; this device can effectively be protected pressure instrumentataion, avoids it to be subject to instantaneous pressure impact and causes damage and fracture.
To achieve these goals, the technical solution of the utility model is as follows, based on an adjustable pressure measurement damping device for damping and differential principle, it is characterized in that, described damping device comprises adjustable damper, buffer unit and be arranged on secondary buffer on buffer unit, described buffer unit comprises front cover and rear end cover, cylinder barrel, piston rod and piston, described main piston moves in cylinder barrel, and piston rod and piston are threaded connection and are integrated.
As a kind of improvement of the present utility model, described damping can be passed through regulating handle (6) and regulate, and described secondary buffer comprises piston, spring and adjustable end cap.
As a kind of improvement of the present utility model, described main piston (9) has differential pressure characteristic, and because piston rod (3) has different-diameter in main piston (9) both sides, the two ends of piston (3) have unequal-area.
As a kind of improvement of the present utility model, between described piston rod (3) and front cover (1), be provided with rod seal (11); Between main piston (9) and cylinder barrel (2), be provided with piston seal.
Advantage of the present utility model is as follows, and 1) overall structure is simple, cost is lower, easy to operate; 2), when compression shock appears in system, this technological scheme can effectively be filtered and subdue pressure pulse value at Pressure testing point, to protect pressure detecting element, avoids it to suffer damage; The utility model is realized the damping function between pressure input and output by the series connection of damping hole and adjustable damper, and forms differential circuit; The instantaneous pressure of realizing two chambeies by the structure of similar single rod two-way cylinder is poor; By minibuffer, realize the fine motion of main piston under pressure peak, and the absorption of abnormal pressure fluctuation in rodless cavity, and form damping two ends pressure reduction by motion, and then pressure peak is filtered and decayed, and when pressure level-off, realize collection and the detection of true pressure.3) this technological scheme effectively reduces hydraulic-pressure control apparatus specification and volume, more easily realize integrated and miniaturization, and the checking that has been applied at the scene, its advance be mainly reflected in the optimized device inside that control mode itself possesses stressed, improve life of equipment, reduce maintenance cost, reduce use and the aspect of performances such as Impact in Hydraulic System, therefore for large industrial enterprise and unidirectional severe duty, there is the meaning of promoting the use of of reality.
Accompanying drawing explanation
Fig. 1 is the utility model sectional view;
In figure: the 1st, oil cylinder front cover; The 2nd, cylinder barrel; The 3rd, piston rod; The 4th, rear end cover; The 5th, pressure measurement hydraulic fluid port; The 6th, adjustable damper; The 7th, damping hole; The 8th, piston seal; The 9th, main piston; The 10th, access hydraulic fluid port; The 11st, rod seal; The 12nd, secondary buffer piston; The 13rd, secondary buffer spring; The 14th, secondary buffer end cap.
Embodiment
In order to deepen, to understanding and cognition of the present utility model, below in conjunction with the drawings and specific embodiments, the utility model to be made further instructions and introduced.
embodiment 1:
Referring to Fig. 1, a kind of adjustable pressure measurement damping device based on damping and differential principle, it is characterized in that, described damping device comprises adjustable damper, buffer unit and be arranged on secondary buffer on buffer unit, and described buffer unit comprises front cover 1 and rear end cover 4, cylinder barrel 2, piston rod 3 and piston, described main piston 9 is in the interior motion of cylinder barrel 2, and piston rod 3 and piston 9 are threaded connection and are integrated.
embodiment 2:
Referring to Fig. 1, as a kind of improvement of the present utility model, described damping can regulate by regulating handle 6, and described secondary buffer comprises piston 12, spring 13 and adjustable end cap 14.All the other structures are identical with embodiment 1 with advantage.
embodiment 3:
Referring to Fig. 1, as a kind of improvement of the present utility model, described main piston 9 has differential pressure characteristic, and because piston rod 3 has different-diameter in main piston 9 both sides, the two ends of piston 3 have unequal-area.All the other structures are identical with embodiment 1 with advantage.
embodiment 4:
Referring to Fig. 1, as a kind of improvement of the present utility model, between described piston rod 3 and front cover 1, be provided with rod seal 11; Between main piston 9 and cylinder barrel 2, be provided with piston seal.All the other structures are identical with embodiment 1 with advantage.
Working principle of the present utility model is as follows: with working principle and the condition of installing under three kinds of states, be described: in the normal range of detection device or according to the Pressure testing in operating mode setting range; System pressure exceeds setting range or proximity test device range; There is instantaneous hyperpressure in system.
Preconditioning condition and principle that device is used: this device has two adjustable component, one is that 6, one of adjustable dampers are that secondary buffer spring 13 precompression values are set.Between the damper rod of damper and rear end cover circular hole, formed ring-pipe type restriction, damping adjusting bar can reduce the area of passage that fluid passes through downwards, aggrandizement apparatus is from the damping value between system pressure value detected pressures, oil stream by damper when system pressure is increased reduces, thereby increase the detection time that makes checkout value reach system pressure, pressure peak during this period can not enter Detecting element, thereby effective filtration pressure power peak value enters Detecting element, make Pressure testing curve more gently and regional average value.Damper 6 raises and can reduce device damping, reduces the fluctuation to system pressure and filters, and makes trend and the variation of the pressure surge of detection curve regional system.The pre compressed magnitude of secondary buffer spring 13 can effectively be cut down system instantaneous pressure peak value, and the high and low frequency peak value that this setting value and main piston 9 actings in conjunction realize detected pressures regulates.The adjustment of described two elements can be preset, also can be according to actual conditions Field adjustment.
When system pressure fluctuation is in normal range (NR), and change frequency is when lower, and damping device is in steady state.When system pressure raises, because piston both sides pressure in early stage itself is identical, because the active area of rodless cavity (having a side of diameter d 2 push rods) is greater than rod chamber (having a side of d1 diameter piston bar), pressure surge is not enough to make piston 9 to move, rodless cavity is also not enough to open secondary buffer piston 12 through damper import system pressure, the actual incoming pressure of pressure fundamental sum that whole device detects is identical, slightly discrepant is existence due to the Young's modulus of rodless cavity fluid, can be by trace compression, actual checkout value there will be trace to lag behind.When system pressure is when crest reduces, rodless cavity pressure is connected with system through damper 6, also decreases, and due to the existence of damping, the reduction meeting of pressure is milder.
When system pressure fluctuation overrun, this setting value depends on the difference of piston rod and piston area, when rod chamber pressure and this chamber annular piston area long-pending while being greater than rodless cavity pressure and area long-pending, or rodless cavity force value rises to while being enough to open secondary buffer piston 12, in system, ascend to heaven under very fast situation: first main piston 9 moves upward, piston rod 3 rigidly connected with it moves upward thereupon, promote upwards operation of secondary buffer piston 12, rodless cavity fluid initiation pressure increases, and through damper 6 import system pressure gradually.At this process initial stage, because system pressure rises, with rodless cavity pressure initiation pressure reduction, under the effect of damper 6 and fixing damping hole 7, the fluid flow that this pressure reduction forms conducts to rodless cavity not yet at once, the increase of rodless cavity pressure mainly receives bar cavity pressure increase promotion piston 12 and moves generation, and this force value and rod chamber pressure ratio are (D
2-d1
2)/D
2, due to the existence of diameter of piston rod d1, this pressure is lowered and imports pressure-detecting device into through pressure measurement hydraulic fluid port 5.Therefore,, when system pressure rises rapidly, the actual pressure of pressure-detecting device, under the decompression of main buffer, there will not be significantly and raises.Along with damping hole 7 and adjustable damper 6 drawing-in system pressure oil gradually, main piston 9 rodless cavity pressure increase gradually, along with the past of pressure crest, rod chamber pressure also can decrease, oil cylinder forms differential gearing, main piston 9 comes downwards to oil cylinder end, and it is identical with system that oil cylinder rodless cavity keeps, and buffer completes absorption and the buffering of a pressure crest.
When there is the abnormal pressure of over pressure detection device range far away, not only main piston 9 can move upward by trace, simultaneously because the pressure reduction at damped system two ends is higher, system pressure oil also can be introduced into rodless cavity fast, main piston 9 is pushed downwards to oil cylinder bottom in rodless cavity pressure rise process, when rodless cavity pressure rise is when opening secondary buffer piston 12, secondary buffer piston 12 moves upward, and absorbs self-damping system and introduce the pressure oil of rodless cavity.In this process, rodless cavity pressure, all the time in restrained state, is protected rodless cavity detected pressures by its pressure at both sides ratio when main piston 9 moves; When main piston stop motion, by secondary buffer piston 12, move upward and receive the high pressure oil from system pressure, due to flowing of fluid, damped system two ends produce pressure reduction, damping is larger, and pressure reduction is larger, thereby makes rodless cavity pressure lower than system pressure, until secondary buffer piston 12 moves to mechanical limit, buffering course finishes.
In sum, in this device busy process, not only can peak, effective filtration pressure Reeb to the transmission of load cell, and larger at system pressure, in the process that main piston 9 moves up, due to the existence of its two ends surface area difference, this device part high-pressure medium of can also effectively attracting deposit, thereby reduce pressure pulsation and the impact of external system, thereby reduce system pressure impact, play the effect of pressure buffer.
The utility model can also be combined to form new mode of execution by least one and embodiment 1 in technical characteristics described in embodiment 2,3,4.
It should be noted that above-described embodiment is only preferred embodiment of the present utility model; be not used for limiting protection domain of the present utility model; being equal to replacement or substituting of having done on the basis of the above all belongs to protection domain of the present utility model, and protection domain of the present utility model is as the criterion with claims.
Claims (4)
1. the adjustable pressure measurement damping device based on damping and differential principle, it is characterized in that, described damping device comprises adjustable damper, buffer unit and be arranged on secondary buffer on buffer unit, described buffer unit comprises front cover (1) and rear end cover (4), cylinder barrel (2), piston rod (3) and main piston (9), described main piston (9) moves in cylinder barrel (2), and piston rod (3) and piston (9) are threaded connection and are integrated.
2. a kind of adjustable pressure measurement damping device based on damping and differential principle according to claim 1, is characterized in that, described damping can be passed through regulating handle (6) and regulate; Described secondary buffer comprises piston (12), spring (13) and adjustable end cap (14).
3. a kind of adjustable pressure measurement damping device based on damping and differential principle according to claim 1 and 2, it is characterized in that, described main piston (9) has differential pressure characteristic, and because piston rod (3) has different-diameter in main piston (9) both sides, the two ends of piston (3) have unequal-area.
4. a kind of adjustable pressure measurement damping device based on damping and differential principle according to claim 1 and 2, is characterized in that, between described piston rod (3) and front cover (1), is provided with rod seal (11); Between main piston (9) and cylinder barrel (2), be provided with piston seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606569.3U CN203560206U (en) | 2013-09-29 | 2013-09-29 | Adjustable pressure measuring damping device based on principles of damping and differential motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606569.3U CN203560206U (en) | 2013-09-29 | 2013-09-29 | Adjustable pressure measuring damping device based on principles of damping and differential motion |
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| Publication Number | Publication Date |
|---|---|
| CN203560206U true CN203560206U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320606569.3U Expired - Fee Related CN203560206U (en) | 2013-09-29 | 2013-09-29 | Adjustable pressure measuring damping device based on principles of damping and differential motion |
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| Country | Link |
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| CN (1) | CN203560206U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953968A (en) * | 2016-05-27 | 2016-09-21 | 俞滨 | Novel superhigh pressure sensor and pressure detection method |
| CN106989866A (en) * | 2017-05-23 | 2017-07-28 | 河北宏龙环保科技有限公司 | A kind of damping pressure table damping device |
| CN110056594A (en) * | 2019-05-23 | 2019-07-26 | 儒拉玛特自动化技术(苏州)有限公司 | Buffer gear |
-
2013
- 2013-09-29 CN CN201320606569.3U patent/CN203560206U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953968A (en) * | 2016-05-27 | 2016-09-21 | 俞滨 | Novel superhigh pressure sensor and pressure detection method |
| CN106989866A (en) * | 2017-05-23 | 2017-07-28 | 河北宏龙环保科技有限公司 | A kind of damping pressure table damping device |
| CN110056594A (en) * | 2019-05-23 | 2019-07-26 | 儒拉玛特自动化技术(苏州)有限公司 | Buffer gear |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140423 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |