CN104500510B - A kind of hydraulic delay controls device - Google Patents
A kind of hydraulic delay controls device Download PDFInfo
- Publication number
- CN104500510B CN104500510B CN201410813264.9A CN201410813264A CN104500510B CN 104500510 B CN104500510 B CN 104500510B CN 201410813264 A CN201410813264 A CN 201410813264A CN 104500510 B CN104500510 B CN 104500510B
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- CN
- China
- Prior art keywords
- piston
- hydraulic
- control
- delay
- flow check
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/10—Delay devices or arrangements
Abstract
It is to be provided with piston in axial hole that a kind of hydraulic delay controls device, and piston one end is arranged with spring and is supported by axial hole step；The other end is provided with flow check piston, and by driving cavity pressure and control cavity pressure and check valve to be driven the motion of moving piston spacing, flow check piston is positioned by axial hole back-end sealing, is achieved in the displacement drive time lengthening to controlled parts.Present configuration is simple, easy to use, had both decreased the hydraulic control system of complexity, and had eliminated again the delay control circuit of sensor and complexity, have a wide range of applications promotion prospect.
Description
Technical field
The present invention relates to a kind of hydraulic controller, particularly one applies hydraulic structure to prolong in hydraulic control system
Time control device.
Technical background
In hydraulic control system, various control functions are mainly realized by hydraulic valve.Under many circumstances, in order to reach
Specifically controlling purpose, when needing some parameters in hydraulic system to meet certain condition, the action to hydraulic valve is controlled
System, or control command send and time delay a period of time after, the action to hydraulic valve is controlled.
The first typical case is to the closed loop control loading certain parameter, in this case, applies when there being control signal
Time in hydraulic control system, hydraulic control system produces corresponding control command and makes hydraulic control system include hydraulic valve
Producing corresponding control action A at interior control element, some parameter ordering about hydraulic system and load occurs to adjust or change, profit
By the parameter of corresponding sensor detection load, the parameter once controlled reaches certain value set in advance, touches the most at once
Hydraulic control system produces corresponding control command B, changes the control action controlling element.The evident characteristic of this process is:
(1) control element to comprise load parameter sensor and usually include hydraulic valve；(2) condition that action A to action B changes
The parameter being controlled reaches certain value set in advance.Owing to have employed load parameter sensor, add the complexity of system
Property, reduce the reliability of system.
The second typical case is the closed loop control that the delays time to control to hydraulic valve replaces to parameter, in this case, when
When having control signal to be applied in hydraulic control system, hydraulic control system produces corresponding control command and makes hydraulic control system
System includes that hydraulic valve produces corresponding control action A at interior control element, and some parameter ordering about hydraulic system and load is sent out
Raw adjusting or change, utilizing the control circuit in whole control system to carry out time delay, time delay a period of time is to guarantee to be controlled
After parameter reaches certain value set in advance, directly produced corresponding control command B by hydraulic control system, change and control element
Control action.The evident characteristic of this process is: (1) control system saves at least one load parameter sensor；(2) control
System needs to increase delay function or one special delay circuit of special increase in an existing electrical circuit；(3) controlling element must
Electrohydraulic control element must be used.When needing one special delay circuit of special increase, too increase the complexity of system equally
Property, in some occasion, even need to consider safety problem, such as the Explosion-Proof when underground coal mine uses.
The present invention will provide a kind of hydraulic delay device, and this hydraulic delay device can pass through after control command is given
The time delay of a period of time produces next action, and its advantage is i.e. to save the load parameter sensor in the case of the first,
The delay circuit in the case of the second can also be saved, reach to control purpose simultaneously.
Summary of the invention
The concrete technical problems that the invention solves the problems that is how to set up hydraulic delay control in simple hydraulic control architectures
Structure processed carries out delays time to control, and then provides a kind of hydraulic delay to control device.
Based on above-mentioned purpose, the measure that the present invention is taked is as follows.
A kind of hydraulic delay controls device, includes the oil inlet passage of a housings close, and by pressure oil to described enter
Controlled parts in the axial hole of oil channel connection realize the hydraulic controller of Bit andits control, it is characterised in that:
In described axial hole, it is provided with piston, is arranged with back-moving spring answering by axial hole in one end of described piston
Position spring supporting step supports；The other end is provided with a flow check piston；Described flow check piston two ends are connected by check valve, unidirectional
The hydraulic oil of valve is from controlling chamber b to driving chamber a flowing；Described flow check piston is by driving cavity pressure p1 and controlling cavity pressure p2
Being driven piston advances forward and spacing, flow check piston is also positioned by axial hole back-end sealing, it is achieved to controlled portion
The displacement drive time lengthening of part.
Further, in a kind of hydraulic delay device, the circumferencial direction of described flow check piston has throttling channel.
Further, in a kind of hydraulic delay device, the shape of cross section structure of described throttling channel be triangle, circular arc or
It it is rectangle.
Further, in a kind of hydraulic delay device, described throttling channel width w ＜ 1mm, throttling channel degree of depth h ＜ 0.5mm, joint
Chute length/throttling channel hydraulic diameter ＞ 4.
Above-mentioned the provided a kind of hydraulic delay of the present invention is provided and controls the technical scheme of device, compared with prior art,
Advantage that is that it directly brings and that necessarily lead to have the active effect that
The hydraulic system that the present invention is controlled according to the value of load parameter for some needs, it usually needs have corresponding
Load parameter sensor, while this increases system complexity, it is often more important that reduce the reliability of system, when adopting
With delays time to control replace sensor detection control time, use the present invention can simplied system structure, improve system reliability.
At some special occasions, such as underground coal mine, need control element is carried out technological processing for explosion protection feature, with employing " circuit delay
Technology adds electrohydraulic control element " scheme compares, and uses the present invention can be substantially reduced technological processing for explosion protection feature difficulty.
Itself do not comprise computer or the hydraulic system of PLC control at some, when needs carry out delay operation, use this
Invention can reduce the complexity of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of hydraulic delay device of the present invention.
Fig. 2 is existing hydraulic principle structural representation.
Fig. 3 is throttling grooves structure schematic diagram of the present invention.
Fig. 4 is triangular groove structural representation of the present invention.
Fig. 5 is arc groove structural representation of the present invention.
Fig. 6 is rectangular groove structure schematic diagram of the present invention.
Fig. 7 is the hydraulic delay operation principle structural representation of the embodiment of the present invention.
In figure: 1: housing；2: piston；3: flow check piston；4: check valve；5: sealing ring；6: housing screw；7: reset bullet
Spring；8: controlled parts；9: seal tabletting；10: liquid controlled reversing valve body.
P1: drive cavity pressure；P2: control cavity pressure；T: oil return opening；W: throttling channel width；H: the throttling channel degree of depth；L: piston
Stroke；A: drive chamber；B: control chamber；S1: back-moving spring support level；S2: flow check piston limited step；K: axial hole；K1: axle
To hole oil duct；K2: axial hole oil-in oil duct；I: throttling channel；J: oil-in；X0: piston-initial-position；X1: controlled member is initial
Position；X2: destination locations.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is made an explanation.
Such as Fig. 1-Fig. 7, above-mentioned the provided a kind of hydraulic delay of the present invention is provided and controls device, when hydraulic control signal drives
During dynamic controlled element, need through the controlled element of time delay rear drive.Realize delays time to control logic, for omitting required sensor, or
Omitting required delay circuit provides one to select.Its structure such as Fig. 1, comprises a housing 1, its internal promising described time-delay mechanism
The oil duct of processing and hole；One piston 2, axially moves in the axial hole K that can design in housing 1；One flow check piston
3, there are three Main Functions: effect one is spacing to piston 2 rearward movement, effect two is sealing ring 5 to compress realization seal, and makees
It is in the middle part of it, on boss, to be machined with throttling channel I with three, it is allowed to hydraulic oil passes through and realizes limiting the speed that hydraulic oil passes through；One
Check valve 4, the driving cavity pressure p1 at connecting joint chute I two ends and control cavity pressure p2；When controlling cavity pressure p2 more than driving chamber
During pressure p 1, it is allowed to hydraulic oil passes through to driving chamber a flowing from controlling chamber b through check valve 4；And it is little when controlling cavity pressure p2
In time driving cavity pressure p1, do not allow hydraulic oil through check valve 4 from driving chamber a to controlling chamber b flowing；One sealing ring 5,
For realizing the sealing of hydraulic oil in time-delay mechanism；One housing screw 6, for compressing flow check piston 3 and being fixed on shell
The position designed in body 1；One back-moving spring 7, for realizing the rearward movement of piston 2, i.e. realizes the return of piston 2；One
Individual controlled parts 8, these controlled parts 8 belong to the parts needing deferred action, can be different portions in different application scenarios
Part, can be such as the spool of hydraulicchange-over valve, for needs time delay control for the hydraulicchange-over valve needing delays time to control
It can be the spool of hydraulic control one-way valve for the hydraulic control one-way valve of system.
The driving cavity pressure p1 of hydraulic control signal, can enter into driving chamber a by the oil circuit on housing 1, it is impossible to logical
Cross check valve 4 enter control chamber b, enter drive chamber a hydraulic oil can in the middle part of flow check piston 3 the throttling channel I on boss
Entering and control chamber b, but flow velocity is restricted, enter and become after controlling chamber b controlling cavity pressure p2, the hydraulic oil controlling chamber b promotes
Piston 2 travels forward, and after segment distance piston stroke L of moving, contacts with controlled parts 8 and promotes controlled parts 8 to travel forward,
Until the power that control cavity pressure p2 is applied on piston 2 balances with the counteracting force from controlled parts 8 or reaches piston 2 by multiple
Position spring 7 is pressed to the position of back-moving spring support level S1, it is achieved required control function.Driving chamber when control signal
Pressure p 1 remove or drop to the lowest after, under the effect of back-moving spring 7, piston 2 rearward movement, now control cavity pressure p2 be more than
Driving cavity pressure p1, check valve 4 is opened, and the hydraulic oil of oil pocket b flows out housing 1 quickly through check valve 4, until piston 2 is backward
Moving to contact with flow check piston 3 and by spacing, it is achieved the returning quickly of piston 2, controlled parts 8 are then according to its functional design
Or it is motionless or also reset.
Implement one hydraulic delay of the present invention control device hydraulic delay control method as follows.
(1) connect with driving chamber a from outside control oil, drive the hydraulic oil of chamber a by the throttling on flow check piston 3
Groove I enters and controls chamber b, and the hydraulic oil entering control chamber b drives piston 2 to move.Described throttling channel I or to be called throttle orifice be elongated
Spiral segment chute,
(2) because the resistance run into when controlling oil by throttling channel is big, the movement velocity of piston 2 is restricted, and piston 2 needs
Contact with by control parts 8 after moving axially so one section of delay time Td, shift piston stroke L, start driver part 8 and transport
Dynamic, complete control action.
(3), when controlled parts 8 return, hydraulic oil enters driving chamber a from controlling chamber b, through throttling channel I and check valve 4, so
The outside oil circuit of the rear flow direction, relative to the process described in above-mentioned (1), it is possible to achieve the quick return of controlled parts 8.
(4) the shape of cross section structure offering throttling channel I, throttling channel I in the middle part of described flow check piston 3 is triangle, circle
Arc or rectangle, its maximum throttling channel width w, maximum throttling channel degree of depth h are all smaller amounts, and generally throttle groove width
Degree w≤1mm, throttling channel degree of depth h >=0.5mm, throttling channel I cincture length Lj along the circumferential direction can be according to delay time Td's
Require design, described throttling channel I it suffices that: throttling channel length/throttling channel hydraulic diameter ＞ 4.
Implement one hydraulic delay of the present invention and control device, it is achieved the calculation method of the delay time Td that its hydraulic delay controls
As follows.
If a length of Lj of the throttling channel I on flow check piston 3, cross section hydraulic diameter are d, its draw ratio meets Lj/d ＞
4.When using as time-delay mechanism, since little by the flow of time-delay mechanism throttling channel I, it is believed that the liquid in throttling channel I
The flow regime of force feed is laminar condition, estimates delay time Td on this basis, according to Hydrodynamics Theory, when driving
Dynamic chamber a and the pressure reduction controlled between the b of chamber are (p1-p2)=Δ p, and the dynamic viscosity of liquid is μ, are calculated by throttling channel I flow q
Method is carried out as follows estimation:
(1)
If a diameter of D of piston 2, then piston 2 moves to the controlled member i.e. piston of initial position x1 from piston-initial-position x0
Time required for stroke L is:
(2)
The method of adjustment of delay time Td:
Formula (2) is the evaluation method of delay time Td, can be adjusted delay time Td in application process, it is possible to
Be based entirely on formula (1) not adjust, (2) calculate.According to formula (2), time delay can be adjusted by piston stroke L
The delay time Td of device.Therefore delay time Td can be adjusted in the following manner: 1. change the axial chi of the push rod of piston 2
Very little, direct piston stroke L；2. change the axial dimension of the push rod of flow check piston 3, adjust by changing piston-initial-position x0
Whole L；3. increase a device, for adjusting the axial dimension between flow check piston 3 and piston 2, i.e. adjust controlled member initial bit
Put x1, reach to adjust the purpose of piston stroke L.
Implementing one hydraulic delay of the present invention and control device, compared with prior art, see accompanying drawing 2, controlled parts 8 start
In controlled member initial position x1, after driving cavity pressure p1 to rise to motivation value pH set, controlled parts 8 setting in motion, phase
Between the most do not postpone, until controlled parts 8 arrive destination locations x2, be reduced to certain pressure set when driving cavity pressure p1
After value pL, controlled parts 8 are back into controlled member initial position x1 by the return force from controlled parts 8, complete one and control week
Phase.During whole, sealing ring 5, seal tabletting 9, housing screw 6 and realize sealing function, oil return inlet T can take back oil pipe line in case
Only piston 2 front end oil pocket choke-out.
The present invention, compared with above-mentioned prior art, sees accompanying drawing 1, and controlled parts 8 start, at controlled member initial position x1, not have
When having control signal, driving cavity pressure p1 the lowest, force value pL set less than, the size deficiency of this pressure overcomes spring
The power of 7 drives piston 2 to travel forward, and piston 2 is pulled to contact, now with flow check piston 3 under the effect of back-moving spring 7
Piston 2 is at piston-initial-position x0, and flow check piston 3 plays the effect spacing to piston 2.Set when driving cavity pressure p1 to rise to
Motivation value pH after, the size of this pressure can overcome the power of back-moving spring 7 completely and be pushed ahead by piston 2, drive chamber pressure
Power p1 also reaches motivation value pH, but cannot pass through check valve 4, can only enter control by the throttling channel I in the middle of flow check piston 3
Chamber b, and be reduced to control cavity pressure p2, p2 drive piston 2 move, limited by the throttling of throttling channel I, piston 2 is initial from piston
Position x0 slowly moves to controlled member initial position x1, and the most controlled parts 8 also do not start to motion, through one section of delay time
Td, piston 2 to controlled member initial position x1, contact with controlled parts 8 and drive controlled parts 8 setting in motion until controlled parts
8 arrive destination locations x2, and this process achieves the delays time to control to controlled parts 8 occurs from motivation value pH；When driving chamber pressure
After power p1 is reduced to force value pL set, from the return force of controlled parts 8 and the restoring force of back-moving spring 7 by controlled parts
8 push controlled member initial position x1 to, and oil circuit now is in addition to the throttling channel I on flow check piston 3, and check valve 4 is opened, hydraulic oil from
Check valve 4 quickly through so that controlled parts 8 are quickly returning to controlled member initial position x1, under the effect of back-moving spring 7, live
Plug 2 continues to be moved back, until the stop motion by the spacing of flow check piston 3, piston 2 arrives piston-initial-position x0, complete
One is become to control the cycle.In whole work process, sealing ring 5, flow check piston 3, housing screw 6 realize sealing function.This
The feature of process is, occurs to controlled parts 8 starting action from motivation value pH, between have an obvious delay time Td, and
After motivation value pH is laid down, controlled parts 8 then do not have time delay phenomenon when returning.
Claims (2)
1. hydraulic delay controls a device, includes the oil inlet passage of a housings close, and by pressure oil to described oil-feed
Controlled parts in the axial hole of channel connection realize the hydraulic controller of Bit andits control, it is characterised in that:
In described axial hole (K), it is provided with piston (2), is arranged with back-moving spring (7) in one end of described piston (2) and passes through axle
Support to the back-moving spring support level (S1) of hole (K)；The other end is provided with a flow check piston (3)；Described flow check piston (3) two
Holding and connected by check valve (4), the hydraulic oil of check valve (4) is from controlling chamber b to driving chamber a flowing；Described flow check piston (3)
By driving cavity pressure p1 and control cavity pressure p2 to be driven piston (2) motion spacing, axial hole (K) back-end sealing is also
Flow check piston (3) is positioned, it is achieved the displacement drive time lengthening to controlled parts (8)；
Wherein, the circumferencial direction of described flow check piston (3) has throttling channel (I)；The width w ＜ 1mm of described throttling channel (I), joint
Chute degree of depth h ＜ 0.5mm, throttling channel length/throttling channel hydraulic diameter ＞ 4.
2. hydraulic delay as claimed in claim 1 controls device, it is characterised in that: the shape of cross section of described throttling channel (I)
Structure is triangle, circular arc or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813264.9A CN104500510B (en) | 2014-12-24 | 2014-12-24 | A kind of hydraulic delay controls device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813264.9A CN104500510B (en) | 2014-12-24 | 2014-12-24 | A kind of hydraulic delay controls device |
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| Publication Number | Publication Date |
|---|---|
| CN104500510A CN104500510A (en) | 2015-04-08 |
| CN104500510B true CN104500510B (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410813264.9A Expired - Fee Related CN104500510B (en) | 2014-12-24 | 2014-12-24 | A kind of hydraulic delay controls device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020198B (en) * | 2015-08-14 | 2017-03-08 | 孙晓君 | A kind of hydraulic actuator and duplicated crank |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU538161A1 (en) * | 1975-03-10 | 1976-12-05 | Научно-Производственное Объединение "Автоматгормаш" | Hydraulic time switch |
| DE3308687A1 (en) * | 1983-03-11 | 1984-09-13 | Robert Bosch Gmbh, 7000 Stuttgart | Relief device for a hydraulic system |
| EP0177620B1 (en) * | 1984-01-26 | 1988-11-02 | GebràDer Sulzer Aktiengesellschaft | Pressure fluid-actuated valve |
| CN1151479A (en) * | 1995-10-13 | 1997-06-11 | 三星电子株式会社 | Reciprocating compressor |
| CN102155462A (en) * | 2010-07-23 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic oil cylinder and relevant device thereof, hydraulic buffer system, excavator and concrete pump truck |
| CN203500188U (en) * | 2013-10-18 | 2014-03-26 | 张志刚 | Pneumatic time-delay device |
| CN204003806U (en) * | 2014-03-18 | 2014-12-10 | 三一汽车制造有限公司 | A kind of time delay hydraulic pressure installation and hydraulic system of pump |
-
2014
- 2014-12-24 CN CN201410813264.9A patent/CN104500510B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU538161A1 (en) * | 1975-03-10 | 1976-12-05 | Научно-Производственное Объединение "Автоматгормаш" | Hydraulic time switch |
| DE3308687A1 (en) * | 1983-03-11 | 1984-09-13 | Robert Bosch Gmbh, 7000 Stuttgart | Relief device for a hydraulic system |
| EP0177620B1 (en) * | 1984-01-26 | 1988-11-02 | GebràDer Sulzer Aktiengesellschaft | Pressure fluid-actuated valve |
| CN1151479A (en) * | 1995-10-13 | 1997-06-11 | 三星电子株式会社 | Reciprocating compressor |
| CN102155462A (en) * | 2010-07-23 | 2011-08-17 | 三一重工股份有限公司 | Hydraulic oil cylinder and relevant device thereof, hydraulic buffer system, excavator and concrete pump truck |
| CN203500188U (en) * | 2013-10-18 | 2014-03-26 | 张志刚 | Pneumatic time-delay device |
| CN204003806U (en) * | 2014-03-18 | 2014-12-10 | 三一汽车制造有限公司 | A kind of time delay hydraulic pressure installation and hydraulic system of pump |
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| Publication number | Publication date |
|---|---|
| CN104500510A (en) | 2015-04-08 |
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Granted publication date: 20161026 Termination date: 20171224 |