CN102518608A - Hydraulic control loop - Google Patents
Hydraulic control loop Download PDFInfo
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- CN102518608A CN102518608A CN2011104552619A CN201110455261A CN102518608A CN 102518608 A CN102518608 A CN 102518608A CN 2011104552619 A CN2011104552619 A CN 2011104552619A CN 201110455261 A CN201110455261 A CN 201110455261A CN 102518608 A CN102518608 A CN 102518608A
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Abstract
The invention discloses a hydraulic control loop, which comprises an accumulator (10) connected with an output port (C), and a first direction control valve (20). The first direction control valve (20) is provided with an oil inlet (201) communicated with a system oil source (P), an oil return port (202) communicated with an oil return circuit (T), and an operation oil port (203) connected to the accumulator (10) through an oil filling circuit (a1). The oil inlet (201) can be selectively communicated with the oil return port (202) or the operation oil port (203). According to the technical scheme, system hydraulic oil from the system oil source can be selectively supplied to the accumulator or the oil return circuit, and accordingly, when pressure of the hydraulic oil in the accumulator reaches a set value of an overflow valve, the system hydraulic oil supplied by the system oil source flows to the oil return circuit under the set pressure of the overflow valve completely so as to reduce energy loss of a hydraulic system.
Description
Technical field
The present invention relates to Hydraulic Field, particularly, relate to a kind of hydraulic control circuit of accumulator.
Background technique
Accumulator is hydraulic element commonly used in the Hydraulic Field, is generally used for for hydraulic control unit (like various control valves) stable control oil sources being provided.
Shown in Figure 1 is a kind of hydraulic control circuit of traditional accumulator, is used for making this accumulator always to maintain the hydraulic oil of predetermined pressure.As shown in Figure 1, the hydraulic control circuit of this accumulator comprises: through the accumulator 10 that the oil-filled Lu Eryu oil sources P of system that is in series with filter 11 is communicated with, this accumulator 10 is connected with delivery outlet C; Relief valve 12; This relief valve 12 is connected between said oil-filled road and the oil circuit T; This relief valve 12 has first and controls mouthful 121 and second a control mouth 122, and this first control mouth is connected with said oil-filled road, and said second a control mouthful direction of passage control valve 13 is communicated with said oil circuit T.
In the time need replenishing hydraulic oil (be used for delivery outlet C like guide's control be generally end) to accumulator; Direction control 13 ends; The system's hydraulic oil that comes from the oil sources P of system is through getting into accumulator 10 through said oil-filled road after the filtration of filter 11, to realize the topping up accumulation of energy.After the pressure of hydraulic oil in the accumulator 10 reached the setting pressure of relief valve 12, then accumulator 10 was accomplished the topping up accumulation of energys, and the hydraulic oil general of system who is supplied by the oil sources P of system all flows to oil circuit T with the setting pressure of relief valve 12, thereby realizes overflow.
When delivery outlet C needed accumulator 10 supply pressure hydraulic oil, then accumulator 10 can stably provide pressure hydraulic oil to delivery outlet C.And if when the pressure of hydraulic oil was lower than the setting pressure of relief valve 12 in the accumulator 10, then relief valve 12 stopped overflow situation, thereby again accumulator 10 is carried out the topping up accumulation of energy.
When the state of emergency occurring; The operator can make position control valve 13 connect, thereby makes relief valve 12 be in on-state, thereby relief valve 12 is in overflow situation immediately; Thereby the pressure of the hydraulic oil at accumulator 10 and delivery outlet C place can both be minimized, thereby realizes the effect of safety protection.
Yet; The shortcoming of the hydraulic control circuit of this traditional accumulator is; After accumulator 10 was accomplished the topping up accumulation of energys, the hydraulic oil in the accumulator 10 (oil-filled road) always carried out overflow with the setting pressure of higher relief valve 12 constantly, thereby causes the more energy of hydraulic system loss.
Thereby the energy loss that how to reduce the hydraulic control circuit of traditional accumulator becomes related domain technical issues that need to address.
Summary of the invention
The hydraulic control circuit that the purpose of this invention is to provide a kind of accumulator, this hydraulic control circuit can reduce the loss of hydraulic system energy.
To achieve these goals; The present invention provides a kind of hydraulic control circuit; This hydraulic control circuit comprises accumulator, and this accumulator is connected with delivery outlet, and said hydraulic control circuit also comprises the first direction control valve; This first direction control valve has the filler opening that is communicated with the system oil sources, the return opening that is communicated with oil circuit and is connected in the actuator port of said accumulator through oil-filled road, and said filler opening can optionally be communicated with said return opening or said actuator port.
Preferably, when the pressure of hydraulic oil was lower than predetermined pressure in said accumulator, said filler opening was communicated with said actuator port; When the pressure of hydraulic oil was not less than predetermined pressure in said accumulator, said filler opening was communicated with said return opening.
Preferably, said first direction control valve is electromagnetism position control valve or manual position control valve.
Preferably, said first direction control valve is the hydraulic control position control valve, and this hydraulic control position control valve has the control mouth, and this control mouth is connected in said oil-filled road.
Preferably, the elastic force that acts on the spring on the spool of said hydraulic control position control valve is adjustable.
Preferably, be in series with one-way valve in the said oil-filled road.
Preferably, be connected with relief valve between said oil-filled road and the said oil circuit.
Preferably, the oil pressure relief of said relief valve is adjustable.
Preferably; This hydraulic control circuit also comprises the second direction control valve; This second direction control valve comprises first hydraulic fluid port that is communicated with said delivery outlet, second hydraulic fluid port that is communicated with said oil-filled road and the return opening that is communicated with said oil circuit, and said first hydraulic fluid port can optionally be communicated with said second hydraulic fluid port or return opening.
Preferably, said first direction control valve comprises: valve body, this valve body comprise the chamber with first port and second port, and said filler opening, return opening and the actuator port of said first direction control valve all is arranged on the sidewall of said valve body; First spring seat, this first spring seat are installed on first port of said valve body and in the chamber of said valve body, are supported with first spring; Damping plug, this damping plug are installed on second port of said valve body and have the damping hole that runs through; Spool; This spool is arranged in the chamber of said valve body movably and is limited with the spring chamber that holds said first spring that is compressed by the first end of said spool, the oil suction chamber that is communicated with the said filler opening of said first direction control valve and the control chamber adjacent with the second end of said spool; Said spool has first cavity that extends successively from said the second end towards said first end and radial dimension second cavity less than this first cavity; Offer first return opening, second return opening and oil-feed port on the sidewall of said spool; This first return opening is communicated with said spring chamber through first oil duct; Said second return opening communicates with said second cavity, and said oil-feed port communicates with said first cavity, and said second cavity is communicated with said oil suction chamber through second oil duct; Second spring seat; This second spring seat be installed on said spool the second end opening and in said first cavity, be supported with second spring; This second spring is pressed on ball on the stepped part between said first cavity and second cavity, and said control chamber is communicated with between the said damping plug and second spring seat and with the control mouth of said first direction control valve; Said spool has the primary importance and the second place, and in primary importance, said first return opening is communicated with the return opening of said first direction control valve, and said second return opening ends, and said oil-feed port is communicated with the actuator port of said first direction control valve; In the said second place, said second return opening is communicated with the said return opening of said first direction control valve, and said oil-feed port ends.
Preferably; Said first direction control valve also comprises articulated joint; This articulated joint comprises: first tube is sleeved on to the rotatable and liquid seal of this first tube on the valve body of said first direction control valve and the said filler opening of said first direction control valve is positioned at this first tube; With second tube, the radial direction of this second tube from the sidewall of said first tube along this first tube extended and said second tube communicates with said first tube.
Pass through technique scheme; Can with system's the selecting property of hydraulic pressure grease separation that comes from system's oil sources be supplied to accumulator or be fed to oil circuit; Thereby after the pressure of hydraulic oil in the accumulator reaches the setting pressure of relief valve; Then the hydraulic oil general of system by system's oil sources supply all flows to oil circuit with the setting pressure of relief valve, to reduce the energy loss of hydraulic system.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic representation of traditional hydraulic control circuit of accumulator;
Fig. 2 is the schematic representation of the hydraulic control circuit of accumulator according to the preferred embodiment of the present invention.
Fig. 3 is the sectional view of a kind of concrete structure of first direction control valve;
Fig. 4 is the schematic representation that is connected with the first direction control valve shown in Figure 3 of articulated joint.
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
As shown in Figure 2; Hydraulic control circuit according to the present invention comprises accumulator 10; This accumulator 10 is connected with delivery outlet C, and wherein, said hydraulic control circuit also comprises first direction control valve 20; This first direction control valve 20 has the filler opening 201 that is communicated with the oil sources P of system, the return opening 202 that is communicated with oil circuit T and is connected in the actuator port 203 of said accumulator 10 through oil-filled road a1, and said filler opening 201 can optionally be communicated with said return opening 202 or said actuator port 203.
Can know with Fig. 2 through comparison diagram 1, compare that the main improvements of technological scheme of the present invention are for to be provided with first direction control valve 20 between accumulator 10 and the oil sources P of system with the hydraulic control circuit of traditional accumulator.Utilize this first direction control valve 20 can with system's the selecting property of hydraulic pressure grease separation that comes from the oil sources P of system be supplied to accumulator 10, perhaps be fed to oil circuit T.Specifically; When needs during to accumulator 10 topping up accumulation of energys; Then the filler opening 201 of first direction control valve 20 is communicated with actuator port 203; Thereby system's hydraulic oil is fed to accumulator 10, realizes the topping up accumulation of energy (being that first direction control valve 20 is in the topping up state that accumulator 10 is carried out topping up) of accumulator 10.When the pressure of hydraulic oil in the accumulator 10 reaches predetermined extent; The filler opening 201 of first direction control valve 20 is communicated with return opening 202, thereby makes system's hydraulic oil under the effect that does not almost have resistance and flow to (being that first direction control valve 20 is in overflow situation) among the oil circuit T.
And as stated; In the hydraulic control circuit of traditional accumulator shown in Figure 1; After the pressure of hydraulic oil in the accumulator reached the setting pressure of relief valve, then the hydraulic oil general of system by system's oil sources supply all flowed to oil circuit with the setting pressure of relief valve.
Obviously; In technological scheme according to the present invention; After the pressure of hydraulic oil in the accumulator 10 reaches the setting pressure of relief valve, need not carry out overflow with higher pressure, but directly with in the relatively low pressure flow Huis oil circuit; Thereby can realize reducing the effect of hydraulic system energy loss, and then realize the object of the invention.
Specifically; When accumulator 10 needs the topping up accumulation of energy; When promptly the pressure of hydraulic oil is lower than predetermined pressure in said accumulator 10; Said filler opening 201 is communicated with said actuator port 203, so that system's hydraulic oil gets in the accumulator 10, to carry out the topping up accumulation of energy through filler opening 201, actuator port 203, oil-filled road a1; And after accumulator 10 was accomplished accumulation of energy, when promptly the pressure of hydraulic oil was not less than predetermined pressure in said accumulator 10, said filler opening 201 was communicated with said return opening 202, so that system's hydraulic oil flows in the oil circuit through filler opening 201, return opening 202.
First direction control valve 20 can be various types of position control valves, as long as can realize the above-mentioned function of this first direction control valve 20.
For example, said first direction control valve 20 can be electromagnetism position control valve or manual position control valve.At first direction control valve 20 is under the situation of electromagnetism position control valve, and this first direction control valve 20 can move according to preset program; Perhaps, can be provided with the sensor that detects the pressure of hydraulic oil in the accumulator 10, this sensor is electrically connected with the electromagnetism position control valve, thereby this electromagnetism position control valve can move according to the signal of the sensor.At first direction control valve 20 is under the situation of manual position control valve, then can be by operator's manual operation.
Under the preferable case, as shown in Figure 2, said first direction control valve 20 is the hydraulic control position control valve, and this hydraulic control position control valve has control mouth 204, and this control mouth 204 is connected in said oil-filled road a1.
Thereby; When accumulator 10 needs the accumulation of energy topping up (for example, when accumulator 10 is accomplished behind delivery outlet C supply hydraulic fluid), the spool of first direction control valve 20 is in the position, a left side among Fig. 1; Then filler opening 201 is communicated with actuator port 203, allows to accumulator 10 topping up accumulation of energys.Carrying out along with the topping up accumulation of energy; The pressure of hydraulic oil increases gradually in then oil-filled road a1 and the accumulator 10; If the pressure of hydraulic oil reaches predetermined pressure in the accumulator 10; Then the pressure of this hydraulic oil acts on the spool of first direction control valve 20 through control mouth 204, thereby spool is moved to the left, and then makes the spool of first direction control valve 20 moving to right position from left dislocation.Spool at first direction control valve 20 is under the situation of right position, and filler opening 201 is communicated with return opening 202, thereby system's hydraulic oil no longer passes through actuator port 203 to accumulator 10 topping up accumulation of energys, then flows among the oil circuit T through return opening 202.And if accumulator 10 work and to delivery outlet C supply hydraulic fluid; When thereby the pressure that makes hydraulic oil in the accumulator 10 is lower than predetermined pressure; Then this pressure signal can feed back to the control mouth 204 of first direction control valve 20; From and make the spool of first direction control valve 20 position, a left side that moves right, with to accumulator 10 topping up accumulation of energys.
Under the preferable case, in order to be applicable to multiple different working conditions, the elastic force that acts on the spring on the spool of said hydraulic control position control valve is adjustable.Therefore, in different working conditions,, when the pressure of hydraulic oil in the accumulator 10 reaches the pressure of correspondence, just can make the spool action of hydraulic control position control valve through the elastic force of the spring of corrective action on the spool of said hydraulic control position control valve.
Shown in Figure 2 is principle schematic according to the hydraulic control circuit of accumulator of the present invention.For principle and the purpose that realizes this hydraulic control circuit, can be designed with multiple various structure as the first direction control valve 20 of hydraulic control position control valve.
Here, the invention provides a kind of preferred construction form of first direction control valve 20, as shown in Figure 3.
As shown in Figure 3; Said first direction control valve 20 comprises: valve body 101; This valve body 101 comprises the chamber 104 with first port one 02 and second port one 03, and the said filler opening 201 of said first direction control valve 20, return opening 202 and actuator port 203 all are arranged on the sidewall of said valve body 101; First spring seat 104, this first spring seat 104 are installed on first port one 02 of said valve body 101 and in the chamber 104 of said valve body 101, are supported with first spring 106; Damping plug 105, this damping plug 105 are installed on second port one 03 of said valve body 101 and have the damping hole 121 that runs through; Spool 107; This spool 107 is arranged in the chamber 104 of said valve body 101 movably and is limited with the spring chamber 108 that holds said first spring 106 that is compressed by the first end of said spool 107, the oil suction chamber 109 that is communicated with the said filler opening 201 of said first direction control valve 20 and the control chamber 110 adjacent with the second end of said spool 107; Said spool 107 has first cavity 111 and second cavity 112 of radial dimension less than this first cavity 111 that extends successively from said the second end towards said first end; Offer first return opening 113, second return opening 114 and oil-feed port 115 on the sidewall of said spool 107; This first return opening 113 is communicated with said spring chamber 108 through first oil duct 116; Said second return opening 114 communicates with said second cavity 112; Said oil-feed port 115 communicates with said first cavity 111, and said second cavity 112 is communicated with said oil suction chamber 109 through second oil duct 117; Second spring seat 118; This second spring seat 118 be installed on said spool 107 the second end opening and in said first cavity 111, be supported with second spring 119; This second spring 119 is pressed on ball 120 on the stepped part between said first cavity 111 and second cavity 112, and said control chamber 110 is communicated with between the said damping plug 105 and second spring seat 118 and with the control mouth 204 of said first direction control valve 20; Said spool 107 has the primary importance and the second place; Primary importance (first direction control valve 20 is in the topping up state that carries out topping up for accumulator 10); Said first return opening 113 is communicated with the return opening 202 of said first direction control valve 20; Said second return opening 114 ends, and said oil-feed port 115 is communicated with the actuator port 203 of said first direction control valve 20; The said second place (first direction control valve 20 is in overflow situation), said second return opening 114 is communicated with the said return opening 202 of said first direction control valve 20, and said oil-feed port 115 ends.
When needs carry out topping up to accumulator 10; First direction control valve 20 is in primary importance (being the topping up state); This moment, said first return opening 113 was communicated with the return opening 202 of said first direction control valve 20; Said second return opening 114 ends, and said oil-feed port 115 is communicated with the actuator port 203 of said first direction control valve 20.Under this topping up state; The flow direction of system's hydraulic oil arrives second cavity 112 through filler opening 201, oil suction chamber 109, second oil duct 117; Push ball 120 backs again open and get into first cavity 111; Get into the actuator port 203 of said first direction control valve 20 again through oil-feed port 115, thereby realize topping up accumulator 10.
When the pressure of accumulator 10 arrives predetermined value; The pressure of hydraulic oil acts on through control mouthfuls 204 on the second end of spool 107 of first direction control valve 20; Thereby spool 107 (in the orientation of Fig. 3) is moved up, promptly move to the second place from primary importance.In the process that this moves, first spring 106 is by further compression, and the hydraulic oil in the spring chamber 108 arrives first return opening 113 through first oil duct 116.
When the displacement of spool 107 greater than after apart from f, spool 107 is in the second place, in this second place, said second return opening 114 is communicated with the said return opening 202 of said first direction control valve 20, said oil-feed port 115 ends.Therefore; System's hydraulic oil arrives second cavity 112 through filler opening 201, oil suction chamber 109, second oil duct 117; And then get into the said return opening 202 of said first direction control valve 20, thereby flow back to oil circuit T through second return opening 114 that is communicated with this second cavity 112.Therefore, realize the low pressure overflow situation.
If accumulator 10 is behind delivery outlet C fuel feeding and the pressure of the hydraulic oil in this accumulator 10 reduces; Then spool 107 can be under the effect of first spring 106 and leave the second place and move to primary importance; Thereby make first direction control valve 20 return to the topping up state, the pressure recovery of the hydraulic oil in accumulator 10 is till the predetermined pressure.
Can know through foregoing description, utilize first direction control valve 10 can automatically be implemented in the topping up of accumulator 10 and the conversion between the low pressurized overflow.And the specific constructive form of above-mentioned first direction control valve 10 is the form of cartridge valve, and is easy to use, and structure is very compact.First direction control valve 10 is not limited to structural type shown in Figure 3, but on the basis that meets running principle shown in Figure 2, can have multiple different structural forms according to concrete operating mode.
Preferably; As shown in Figure 4; Said first direction control valve 20 also comprises articulated joint 130; This articulated joint 130 comprises: first tube 131 is sleeved on to the rotatable and liquid seal of this first tube 131 on the valve body 101 of said first direction control valve 20 and the said filler opening 201 of said first direction control valve 20 is positioned at this first tube 131; With second tube 132, the radial direction of this second tube 132 from the sidewall of said first tube 131 along this first tube 131 extended and said second tube 132 communicates with said first tube 131.
Utilize articulated joint 130, can realize rotation, thereby make things convenient for the connection setting of this first direction control valve 20 with respect to valve body 101.
As shown in Figure 4, in order to obtain the better seal effect, between first tube 131 and valve body 101, also be provided with seal ring 133.
The structural type of articulated joint 130 is not limited to this, but can select other structural type of design according to concrete operating mode, as long as can realize rotatable with valve body 101 and liquid seal ground is connected.
Preferably, as shown in Figure 2, be in series with one-way valve 21 among the said oil-filled road a1.This one-way valve 21 helps the pressurize of accumulator, and the handoff procedure that topping up and the low pressure of first direction control valve 20 are refluxed is steady.
Under the preferable case, as shown in Figure 2, be connected with relief valve 22 between said oil-filled road a1 and the said oil circuit T, thereby the pressure that prevents hydraulic oil among the oil-filled road a1 (and accumulator 10) is excessive.Specifically, after accumulator 10 was accomplished the accumulation of energy topping ups, if still there is system's hydraulic oil to charge into (for example under the situation of position control valve 20 faults) in the accumulator 10, the pressure that then can cause hydraulic oil in the accumulator 10 continued to increase and surpasses predetermined pressure.In this case, owing to be provided with relief valve 22, then can overflow among the oil circuit T, thereby guarantee security of system through the hydraulic oil of relief valve 22 with overpressure.
Preferably, in order to be adapted to multiple different working conditions requirement, the oil pressure relief of said relief valve 22 is adjustable.
Can know through foregoing description, when accumulator 10 needs the accumulation of energy topping up, then can utilize first direction control valve 20 that system's hydraulic oil is directed in the accumulator 10; After accumulator 10 was accomplished the accumulation of energy topping ups, then first direction control valve 20 was directed to system's hydraulic oil among the oil circuit T, and can be constantly with the elevated pressures overflow, thereby realized the object of the invention.
As shown in Figure 2; Under preferable case; Shown in hydraulic control circuit also comprise second direction control valve 23; This second direction control valve 23 comprises first hydraulic fluid port 231 that is communicated with said delivery outlet C, second hydraulic fluid port 232 that is communicated with said oil-filled road and the return opening 233 that is communicated with said oil circuit, and said first hydraulic fluid port 231 can optionally be communicated with said second hydraulic fluid port 232 or return opening 233.
Under the normal condition, first hydraulic fluid port 231 of second direction control valve 23 is communicated with second hydraulic fluid port 232, thereby realizes the connected relation between accumulator 10 and the delivery outlet C.And when system urgent when out of service; The hydraulic oil earial drainage that needs delivery outlet C place; Then can make the spool action of second direction control valve 23, so that first hydraulic fluid port 231 is communicated with return opening 233, so the high-pressure and hydraulic oil at delivery outlet C place then can directly flow among the oil circuit T through first hydraulic fluid port 231 and return opening 233 apace; Thereby realize the valve rod recovery neutral position as system's main valve of control mouth with delivery outlet C, system is out of service.
In addition; Through the setting of second direction control valve 23, when delivery outlet C place hydraulic oil when these second direction control valve 23 earial drainages, the hydraulic oil in the accumulator 10 still remains in the accumulator 10 and unaffected; Therefore when behind the hydraulic oil completion earial drainage at delivery outlet C place and during above-mentioned hydraulic control circuit recovery proper functioning; The pressure of the hydraulic oil of accumulator 10 also is enough to be fed to delivery outlet C, with the action of moving system main valve, thereby can increase work efficiency and saves the energy.Compare with traditional hydraulic control circuit shown in Figure 1, this point also is bigger technological progress.This is because in traditional hydraulic control circuit shown in Figure 1, in case of emergency, the hydraulic oil overflow simultaneously at accumulator 10 and delivery outlet C place if therefore recover normal operation, then needs again accumulator 10 to be carried out the topping up accumulation of energy.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned mode of execution; In technical conceive scope of the present invention, can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition; Each concrete technical characteristics described in above-mentioned embodiment; Under reconcilable situation, can make up through any suitable manner, and be not limited to the restriction of the adduction relationship of each item claim in claims.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (11)
1. hydraulic control circuit; This hydraulic control circuit comprises accumulator (10); This accumulator (10) is connected with delivery outlet (C); It is characterized in that; Said hydraulic control circuit also comprises first direction control valve (20), and this first direction control valve (20) has the filler opening (201) that is communicated with system oil sources (P), the return opening (202) that is communicated with oil circuit (T) and is connected in the actuator port (203) of said accumulator (10) through oil-filled road (a1), and said filler opening (201) can optionally be communicated with said return opening (202) or said actuator port (203).
2. hydraulic control circuit according to claim 1, wherein, when the pressure of hydraulic oil was lower than predetermined pressure in said accumulator (10), said filler opening (201) was communicated with said actuator port (203); When the pressure of hydraulic oil was not less than predetermined pressure in said accumulator (10), said filler opening (201) was communicated with said return opening (202).
3. hydraulic control circuit according to claim 2, wherein, said first direction control valve (20) is electromagnetism position control valve or manual position control valve.
4. hydraulic control circuit according to claim 2, wherein, said first direction control valve (20) is the hydraulic control position control valve, and this hydraulic control position control valve has control mouthful (204), and this control mouthful (204) is connected in said oil-filled road (a1).
5. hydraulic control circuit according to claim 4, wherein, the elastic force that acts on the spring on the spool of said hydraulic control position control valve is adjustable.
6. hydraulic control circuit according to claim 4 wherein, is in series with one-way valve (21) in the said oil-filled road (a1).
7. hydraulic control circuit according to claim 4 wherein, is connected with relief valve (22) between said oil-filled road (a1) and the said oil circuit (T).
8. hydraulic control circuit according to claim 7, wherein, the oil pressure relief of said relief valve (22) is adjustable.
9. hydraulic control circuit according to claim 1; Wherein, This hydraulic control circuit also comprises second direction control valve (23); This second direction control valve (23) comprises first hydraulic fluid port (231) that is communicated with said delivery outlet (C), second hydraulic fluid port (232) that is communicated with said oil-filled road and the return opening (233) that is communicated with said oil circuit, and said first hydraulic fluid port (231) can optionally be communicated with said second hydraulic fluid port (232) or return opening (233).
10. according to any described hydraulic control circuit among the claim 1-9, wherein, said first direction control valve (20) comprising:
Valve body (101); This valve body (101) comprises the chamber (104) with first port (102) and second port (103), and the said filler opening (201) of said first direction control valve (20), return opening (202) and actuator port (203) all are arranged on the sidewall of said valve body (101);
First spring seat (104), this first spring seat (104) are installed on first port (102) of said valve body (101) and in the chamber (104) of said valve body (101), are supported with first spring (106);
Damping plug (105), this damping plug (105) are installed on second port (103) of said valve body (101) and have the damping hole (121) that runs through;
Spool (107); This spool (107) is arranged in the chamber (104) of said valve body (101) movably and is limited with the spring chamber (108) that holds said first spring (106) that is compressed by the first end of said spool (107), the oil suction chamber (109) that is communicated with the said filler opening (201) of said first direction control valve (20) and the control chamber (110) adjacent with the second end of said spool (107); Said spool (107) has first cavity (111) that extends successively from said the second end towards said first end and radial dimension second cavity (112) less than this first cavity (111); Offer first return opening (113), second return opening (114) and oil-feed port (115) on the sidewall of said spool (107); This first return opening (113) is communicated with said spring chamber (108) through first oil duct (116); Said second return opening (114) communicates with said second cavity (112); Said oil-feed port (115) communicates with said first cavity (111), and said second cavity (112) is communicated with said oil suction chamber (109) through second oil duct (117);
Second spring seat (118); This second spring seat (118) be installed on said spool (107) the second end opening and in said first cavity (111), be supported with second spring (119); This second spring (119) is pressed on ball (120) on the stepped part between said first cavity (111) and second cavity (112), and said control chamber (110) is positioned between said damping plug (105) and second spring seat (118) and with the control mouth (204) of said first direction control valve (20) and is communicated with;
Said spool (107) has the primary importance and the second place; In primary importance; Said first return opening (113) is communicated with the return opening (202) of said first direction control valve (20); Said second return opening (114) ends, and said oil-feed port (115) is communicated with the actuator port (203) of said first direction control valve (20); In the said second place, said second return opening (114) is communicated with the said return opening (202) of said first direction control valve (20), and said oil-feed port (115) ends.
11. hydraulic control circuit according to claim 10, wherein, said first direction control valve (20) also comprises articulated joint (130), and this articulated joint (130) comprising:
First tube (131), the rotatable and liquid seal ground of this first tube (131) are sleeved on the valve body (101) of said first direction control valve (20) and the said filler opening (201) of said first direction control valve (20) is positioned at this first tube (131); With
Second tube (132), the radial direction of this second tube (132) from the sidewall of said first tube (131) along this first tube (131) extended and said second tube (132) communicates with said first tube (131).
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| CN201110455261.9A CN102518608B (en) | 2011-12-30 | 2011-12-30 | Hydraulic control loop |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030163A (en) * | 2014-05-23 | 2014-09-10 | 武汉武桥交通装备技术有限公司 | Low-energy consumption and low-heat constant pressure system of full-hydraulic crane for ship |
| CN111720369A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Liquid filling system and engineering machinery |
| CN115076161A (en) * | 2022-05-24 | 2022-09-20 | 中国第一汽车股份有限公司 | Oil circuit system and engine with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104030163A (en) * | 2014-05-23 | 2014-09-10 | 武汉武桥交通装备技术有限公司 | Low-energy consumption and low-heat constant pressure system of full-hydraulic crane for ship |
| CN104030163B (en) * | 2014-05-23 | 2016-06-29 | 武汉武桥交通装备技术有限公司 | A kind of all-hydraulic crane low energy consumption peculiar to vessel and low heating constant-voltage system |
| CN111720369A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Liquid filling system and engineering machinery |
| CN115076161A (en) * | 2022-05-24 | 2022-09-20 | 中国第一汽车股份有限公司 | Oil circuit system and engine with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102518608B (en) | 2014-07-16 |
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