CN102454652B - Adjustable hydraulic pilot opening mechanism - Google Patents
Adjustable hydraulic pilot opening mechanism Download PDFInfo
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- CN102454652B CN102454652B CN201110367707.2A CN201110367707A CN102454652B CN 102454652 B CN102454652 B CN 102454652B CN 201110367707 A CN201110367707 A CN 201110367707A CN 102454652 B CN102454652 B CN 102454652B
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Abstract
The invention discloses an adjustable hydraulic pilot opening mechanism. The adjustable hydraulic pilot opening mechanism aims to overcome the defect that the conventional pilot opening mechanism can be impacted to be damaged easily and has large noise. The invention provides the pilot opening mechanism. In the mechanism, a differential type pilot valve is adopted; one side of the pilot valve is provided with a first cavity which is communicated with a pilot valve oil inlet, and the other side of the pilot valve is provided with a second cavity which is communicated with the first cavity through an oil way between cavities; a pilot valve plug is arranged in a pilot valve seat in a slidable way; the conical part of the pilot valve plug is positioned in the first cavity and is connected with a buffer spring; the side of the second cavity is provided with a pressure regulation spring and a spiral adjustment mechanism; a pilot valve gap between the pilot valve seat and the pilot valve plug, a radial through hole and a pilot valve oil outlet form a leakage oil way for opening the pilot valve; and the opening pressure can be adjusted through the spiral adjustment mechanism conveniently. Through the differential type pilot valve, the inversed pilot valve plug, the buffer spring, the axial movable pilot seat and the pilot valve plug, the impact force during closing of the pilot valve can be reduced, the pilot valve plug can always be in a stable state, and the opening mechanism has the characteristics of small impact, long service life, stability and low noise, and is easy to adjust.
Description
Technical field
The present invention relates to the pilot opening mechanism in the hydraulic element of hydraulic system, particularly hydraulic system.
Technical background
In the hydraulic control valves such as existing relief valve, reduction valve, conventional a kind of hydraulic pilot opening mechanism is controlled the hydraulic pressure in control valve main valve plug Returnning spring chamber, by the hydraulic pressure reducing in main valve plug Returnning spring chamber, opens main valve plug.But in existing hydraulic pilot opening device, guide valve seat is to maintain static, guide valve core is positioned by the column register pin at its top in the valve opening of guide valve seat and with valve opening as intermittently coordinating, this structure is to utilize pressure adjusting spring to carry out the active force of the suffered hydraulic oil of balance guide valve core, therefore requires the rigidity of pressure adjusting spring very high.Control valve frequently opens and closes along with the pressure surge in hydraulic system, and guide valve core and guide valve seat also just open and close continually.Due to fixed during guide valve seat in existing pilot opening mechanism, this just causes the very large impact of generation between the valve seat point limit of pilot valve guide valve core and guide valve seat when opening and closing, make pilot valve cause damage in certain operating time internal cause impact force, reduce control valve working life; And pilot valve is when opening, guide valve core in the valve opening of guide valve seat in quick condition, guide valve core can usually depart from center, guide valve core and valve opening are collided mutually, produce vibration and produce noise, even produce the phenomenon of uttering long and high-pitched sounds, increase the noise radiation of machine, be difficult to meet the requirement of construction machinery hydraulic system.Therefore, this just need to design between pilot valve spool and guide valve seat, impact little, good stability, noise is little, the pilot opening mechanism of long service life.
Summary of the invention
The object of the invention is to for the pilot valve of existing hydraulic pilot opening mechanism be hit large and fragile, the life-span is short, and pilot valve guide valve core when opening easily produces vibration and the shortcoming of uttering long and high-pitched sounds in quick condition, and provide a kind of good stability, noise is little, the adjustable pilot opening mechanism of cracking pressure of long service life.
Technological scheme of the present invention is achieved in that a kind of adjustable hydraulic pilot opening mechanism of structure, it comprises a valve body, in valve body, establish a valve pocket, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume, opposite side has the second cavity volume, the first cavity volume is communicated with the pilot valve filler opening on valve body, in the first cavity volume, the axial area of liquid effects on pilot valve is greater than the axial area of liquid effects on pilot valve in the second cavity volume, in pilot valve, be provided with oil circuit between the chamber that is communicated with the first cavity volume and the second cavity volume, pilot valve comprises guide valve core and guide valve seat, guide valve seat and valve pocket inwall sliding fit, guide valve seat is provided with an axial pilot valve hole that connects guide valve seat, guide valve core comprises the guide portion of head, the tapering of afterbody, connect the joint in guide portion and tapering, guide portion and described pilot valve hole sliding fit, between joint and pilot valve hole hole wall, there is pilot valve gap, tapering is positioned at the first cavity volume, when tapering disengages with guide valve seat point limit, the first cavity volume is communicated with pilot valve gap, guide valve seat is provided with the radial direction through hole that is communicated with pilot valve gap, valve body is provided with the pilot valve oil outlet that is communicated with radial direction through hole, in the first cavity volume, be provided with damping spring, one end of damping spring is connected with guide valve core and guide spool applies towards the elastic force of the second cavity volume direction, in the second cavity volume side, establish pressure adjusting spring and controlling device, one end of pressure adjusting spring is connected with guide valve seat contact, the other end is connected with valve body contact, and controlling device makes guide valve core be less than guide valve seat to the second cavity volume direction shift motion and can regulate guide valve core stroke final position to the shift motion of the second cavity volume direction.。
The adjustable pilot opening mechanism working principle of the present invention is as follows: the first cavity volume is connected with the Returnning spring chamber of all kinds of control valve main valve plugs by pilot valve filler opening, the axially loaded area that is positioned at the first cavity volume due to pilot valve is greater than pilot valve and is positioned at the axially loaded area of the second cavity volume, when the pressure in the first cavity volume reaches the set pressure of opening mechanism, hydraulic oil in the first cavity volume and damping spring are greater than hydraulic oil and the active force of pressure adjusting spring to pilot valve in the second cavity volume to the active force of pilot valve, make pilot valve move (hydraulic oil of the second cavity volume also flows to the first cavity volume by oil circuit between chamber) to the second cavity volume, when guide valve core contacts with controlling device, guide valve core stops mobile, guide valve seat continues to move to the direction of the second cavity volume, now the tapering of guide valve core and the valve seat of guide valve seat point limit disengage, the first cavity volume is communicated with pilot valve gap, hydraulic oil in the first cavity volume is by pilot valve gap, radial direction through hole, pilot valve oil outlet flows out the first cavity volume, pressure in the first cavity volume is reduced rapidly, thereby reduce the pressure in the control valve main valve plug Returnning spring chamber being connected with the first cavity volume, make main valve plug be opened and move.When set pressure that the pressure decreased in the first cavity volume is closed to opening mechanism, hydraulic oil in the first cavity volume and damping spring are less than hydraulic oil and the axial force of pressure adjusting spring to pilot valve in the second cavity volume to the axial force of pilot valve, guide valve seat moves to the first cavity volume direction under the effect of pressure adjusting spring, the valve seat point limit of guide valve seat is contacted with the conical surface in the tapering of guide valve core, disconnection is from the oil circuit in the first cavity volume and pilot valve gap, make the boost in pressure of the first cavity volume, thereby also improve the pressure in the control valve main valve plug Returnning spring chamber being connected with the first cavity volume, main valve plug is moved closes.In the present invention, by controlling device, regulate the stroke of guide valve core, also regulate guide valve core to contact when spacing the reduction length that when namely pilot valve is opened, pressure adjusting spring is compressed by guide valve seat with controlling device, also regulate the elastic force of pressure adjusting spring when pilot valve is opened to realize the cracking pressure of this opening mechanism of adjusting.The guide valve core of the pilot valve of the present invention by differential type, upside-down mounting is the measures such as the guide valve core side that is arranged on pilot valve oil-feed, damping spring, axially movable guide valve seat and guide valve core impact force when reducing pilot valve and closing, and make guide valve core all the time in a steady state, to realize this mechanism, impact the advantage little, the life-span is long, noise is low.
In the present invention, between chamber, on oil circuit, be provided with pilot valve throttle orifice, in the process of closing at pilot valve, pressure adjusting spring promotes guide valve seat and moves to the first cavity volume direction, and the volume of the second cavity volume increases, and hydraulic oil flows to the second cavity volume by oil circuit between chamber from the first cavity volume, owing to being provided with throttle orifice on oil circuit between chamber, the hydraulic oil being by convection in the second cavity volume has damping function, therefore can slow down the speed that guide valve seat moves to the first cavity volume direction, thereby reduces the impact between guide valve seat and guide valve core.
In the present invention, controlling device comprises adjustable lever, and one end of adjustable lever is the spacing adjustable side that can contact with the guide portion termination of guide valve core, the connecting end that the other end is connected with valve body by screw mechanism.By screw mechanism, regulate the position of the adjustable side of adjustable lever to realize the stroke and the position that regulate guide valve core to contact with adjustable lever.Screw mechanism comprises and is arranged on the adjustable lever mounting hole of connecting valve inside and outside on valve body and is arranged on the regulating nut that mounting hole outside and valve body are spirally connected, and the connecting end of adjustable lever contacts and is connected with regulating nut with mounting hole sliding fit and termination.By rotary nut, stroke and position when realizing adjustable lever and sliding in mounting hole and regulate guide valve core to contact with adjustable lever.Screw mechanism can also be to comprise the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body, the connecting end of adjustable lever is arranged in mounting hole, the connecting end of adjustable lever and mounting hole hole wall are provided with the screw thread cooperatively interacting, and on the end face of adjustable lever connecting end, are provided with inner hexagonal hole.
In the present invention, the end face of the contiguous controlling device of guide valve seat is provided with a cavity, and the sidewall of cavity coordinates described the second cavity volume of formation with the side of adjustable lever.
In the present invention, between chamber, oil circuit can be arranged on guide valve seat, also can be arranged on guide valve core, when being arranged on guide valve core, the spacing adjustable side of adjustable lever is provided with from the logical oily passage that end face flows into, flow out side, when spacing adjustable side is connected with guide valve core contact, between chamber, oil circuit can be communicated with the second cavity volume by logical oily passage.Logical oil duct can be taked various ways, for example on the end face of spacing adjustable side, be provided with counterbore, side is provided with the perforation that runs through counterbore sidewall, counterbore when guide valve core and the contact of spacing adjustable side are connected with chamber between oil circuit be communicated with, or on the end face of spacing adjustable side, arrange and run through the end face oil groove of whole spacing adjustable side end face, in guide valve core and spacing adjustable side, contact while being connected oil circuit between end face oil groove and chamber and be communicated with.
The present invention provides another kind of technological scheme for solving its technical problem, this scheme is a kind of adjustable hydraulic pilot opening mechanism of structure, it comprises a valve body, in valve body, establish a valve pocket, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume, opposite side has the second cavity volume, the first cavity volume is communicated with the pilot valve filler opening on valve body, in the first cavity volume, the axial area of liquid effects on pilot valve is greater than the axial area of liquid effects on pilot valve in the second cavity volume, in pilot valve, be provided with oil circuit between the chamber that is communicated with the first cavity volume and the second cavity volume, described pilot valve comprises guide valve core and guide valve seat, described guide valve seat and pilot valve cavity wall sliding fit, guide valve seat is provided with an axial pilot valve hole that connects guide valve seat, described guide valve core comprises the guide portion of head, the tapering of afterbody, connect the joint in guide portion and tapering, described guide portion and described pilot valve hole sliding fit, between described joint and pilot valve hole hole wall, there is pilot valve gap, described tapering is positioned at the first cavity volume, when tapering disengages with guide valve seat point limit, the first cavity volume is communicated with pilot valve gap, guide valve seat is provided with the radial direction through hole that is communicated with pilot valve gap, valve body is provided with the pilot valve oil outlet that is communicated with radial direction through hole, in described the first cavity volume, be provided with damping spring, one end of described damping spring is connected with described guide valve core and guide spool applies towards the elastic force of the second cavity volume direction, in the second cavity volume side, be provided with pressure adjusting spring, adjustable diameter and screw adjusting mechanism, one end of described pressure adjusting spring is connected with guide valve seat contact, the other end is connected and can be regulated by adjustable diameter and screw adjusting mechanism the pretension elastic force of pressure adjusting spring with adjustable diameter and screw adjusting mechanism, on the sidewall of the first cavity volume, be provided with spacing shoulder, in the tapering of guide valve core, be provided with the spacing preiection of spacing shoulder Corresponding matching.When the pilot opening mechanism in the present invention is worked, when the pressure in the first cavity volume is during higher than the setting of pressure adjusting spring, the limit dais shoulder grafting of the positive stop lug boss in guide valve core tapering and the first cavity volume sidewall touches and makes guide valve core stop moving, guide valve seat continues mobile and causes pilot valve to be opened, and makes the pressure decreased in the first cavity volume.The pressure that can regulate pilot valve to open by the pretension elastic force of adjustable diameter and screw adjusting mechanism Regulation spring in the present invention.
Adjustable diameter and screw adjusting mechanism comprises adjustable lever, is provided for the pilot hole of adjustable lever sliding fit on valve body, is arranged on the nut that pilot hole outside is connected with valve body screw thread in the present invention, the inner end of described adjustable lever is connected with pressure adjusting spring contact, and outer end is connected with nut contact.Adjustable diameter and screw adjusting mechanism can also be adjustable lever direct and that valve body is spirally connected in addition, and the inner end of adjustable lever contacts with pressure adjusting spring, and outer end is positioned at outside valve body, available instrument rotary regulating lever.
The present invention compared with prior art, has following beneficial effect:
1. in pilot opening mechanism of the present invention, guide valve core and guide valve seat all can slide axially, and when opening mechanism is closed, guide valve seat guide spool moves, and guide valve core is subject to the effect of damping spring, impact when available buffer guide valve seat contacts with guide valve core; The present invention can make pilot valve be subject to the lifting surface area of hydraulic oil axial action in the second cavity volume to be slightly less than pilot valve to be subject to by design the lifting surface area of hydraulic oil axial action in the first cavity volume in addition, thereby can select the pressure adjusting spring that rigidity is less, the impact of guide valve seat and guide valve core while reducing pilot valve open and close.The present invention by can axially movable guide valve seat, the reduction guide valve seat such as the buffering of guide valve core, damping spring and the guide valve core impact force while closing, thereby extend working life of pilot valve.
2. in the present invention, guide valve core is by its guide rod and valve opening sliding fit, it only can slid axially along guide's valve opening, can not produce skew radially, when pilot valve is opened, one end of guide valve core is subject to the extruding of damping spring in addition, the other end and controlling mechanism or limit dais shoulder grafting touch, make it in a kind of steady state, so can not produce vibration, even utter long and high-pitched sounds, can not increase the noise radiation of machine.
3. the stroke while regulating guide valve core to contact with controlling device by controlling device in the present invention and final position or by the elastic force of adjustable diameter and screw adjusting mechanism Regulation spring, conveniently realize the correction adjustment to cracking pressure in the adjusting of this opening mechanism cracking pressure and using process.
Accompanying drawing explanation
Fig. 1 is the structural representation of adjustable hydraulic pilot opening mechanism in the embodiment of the present invention 1;
Fig. 2 is the pilot valve of adjustable hydraulic pilot opening mechanism and the structural representation of controlling mechanism in embodiment 1;
Fig. 3 is the structural representation of adjustable hydraulic pilot opening mechanism in the embodiment of the present invention 2;
Fig. 4 is the structural representation of adjustable hydraulic pilot opening mechanism in the embodiment of the present invention 3;
Fig. 5 is the structural representation of adjustable hydraulic pilot opening mechanism in the embodiment of the present invention 4;
Fig. 6 is the structural representation of adjustable hydraulic pilot opening mechanism in the embodiment of the present invention 5.
Component title and sequence number in figure:
1, plug screw 11, valve pocket 12, pilot valve filler opening 13, pilot valve oil outlet 14, valve seat 15, spacing shoulder 16;
2, the first cavity volume 21, the second cavity volume 22, damping spring 23, pressure adjusting spring 24;
4, oil circuit 44, pilot valve gap 45, pilot valve throttle orifice 46, spacing preiection 47 between guide valve core 4, guide portion 41, tapering 42, joint 43, chamber;
5, guide valve seat 5, radial direction through hole 51;
8, adjustable lever 8, counterbore 81, radial perforation 82, end face oil groove 83, inner hexagonal hole 84, spacing section 85, regulate section 86, spherojoint 87;
9, nut 9, fastening screw nut 91.
Embodiment
Below in conjunction with drawings and Examples, adjustable hydraulic pilot opening mechanism of the present invention is described.
Embodiment 1:
As shown in Fig. 1 Fig. 2, the plug screw 11 that valve body is spirally connected by valve pocket 12 and at valve pocket 12 left ends forms, in valve body, be provided with valve pocket, the sliding pilot valve of establishing in valve pocket, in the left side of pilot valve, be wherein the first cavity volume 21, right side is the second cavity volume 22, and pilot valve comprises guide valve core 4 and guide valve seat 5, guide valve core 4 is provided with oil circuit 44 between the chamber that connects the first cavity volume 21 and the second cavity volume 22, is provided with pilot valve throttle orifice 46 between chamber on oil circuit.The left section of diameter that diameter is greater than right section of guide valve seat 5, valve pocket also has corresponding size diameter section, the size diameter section of guide valve seat 5 respectively with slippery the closing of size diameter section of valve pocket, make hydraulic oil in the first cavity volume 21 act on pilot valve axially effectively lifting surface area be greater than the interior hydraulic oil of the second cavity volume 22 and act on the axially effective lifting surface area on pilot valve.The pilot valve hole of axially running through guide valve seat 5 is established at the center of guide valve seat 5, guide valve core 4 is slidedly arranged in pilot valve hole, guide valve core 4 comprises the guide portion 41 of its head, the tapering 42 of afterbody, the middle joint 43 that connects guide portion 41 and tapering 42, between the hole wall in joint 43 and pilot valve hole, there is pilot valve gap 45, tapering 42 is positioned at the first cavity volume 21, and tapering 42 can be touched to form to seal with the sharp edge joint of guide valve seat and be contacted.In the first cavity volume, establish damping spring 23, one end of damping spring 23 is connected with plug screw 11 contacts, and the other end is connected with tapering 42 contacts of guide valve core 4.On guide valve seat, be provided with the radial direction through hole 51 that is communicated with pilot valve gap 45; On valve pocket 12, be provided with and be communicated with the pilot valve filler opening 13 of the first cavity volume 21, the pilot valve oil outlet 14 of connection radial direction through hole 51.In the second cavity volume 6, be provided with pressure adjusting spring 24, one end of pressure adjusting spring 24 is connected with guide valve seat contact, the other end is connected with valve pocket 12 contacts, in the middle of pressure adjusting spring 24, be provided with adjustable lever 8, one end of adjustable lever 8 is the spacing adjustable side contacting with the termination of the guide portion 41 of guide valve core 4, the other end is connected with nut 9 contacts through the adjustable lever mounting hole on valve pocket 12, nut 9 is positioned at the outside of adjustable lever mounting hole and is spirally connected with valve pocket 12, and the place of being spirally connected is provided with fastening screw nut 91 and prevents the improper movement of nut 9.On the end face of the spacing adjustable side of adjustable lever 8, be provided with counterbore 81, side is provided with the radial perforation 82 that runs through counterbore 81 sidewalls, and when the spacing adjustable side of adjustable lever 8 is contacted with guide valve core 4, the second cavity volume 22 is communicated with by oil circuit 44 between radial perforation 82, counterbore 81 and chamber.
In the present embodiment, when the pressure in the first cavity volume is during lower than pilot valve cracking pressure, under the effect of damping spring 23 and pressure adjusting spring 24, tapering 42 is touched to form to seal with the sharp edge joint of guide valve seat and is contacted, and pilot valve is in closed condition, after the hydraulic fluid pressure in the first cavity volume 21 raises, the active force that acts on pilot valve left side is greater than the active force that acts on pilot valve right side, pilot valve moves right, when guide valve core 4 contacts with adjustable lever 8, pressure in the first cavity volume 21 equals the cracking pressure of pilot valve, if the pressure in the first cavity volume 21 is during higher than this cracking pressure, guide valve core 4 stops mobile, guide valve seat 5 continues to move right, now the tapering 42 of guide valve core 4 disengages with guide valve seat point limit, the first cavity volume 21 is communicated with pilot valve gap 45, hydraulic oil in the first cavity volume 21 is by pilot valve gap 45, radial direction through hole 51, pilot valve oil outlet 14 flows to outside valve pocket 12, cause the pressure in the first cavity volume 21 to reduce rapidly, the pressure that causes the control chamber of the control valve being communicated with the first cavity volume 21 by pilot valve filler opening 13 also reduces and causes control valve action.When the pressure in the first cavity volume 21 is during lower than the cracking pressure of pilot valve, the active force that acts on pilot valve right side is greater than the active force that acts on pilot valve upper left side, guide valve seat 5 is moved to the left under the promotion of pressure adjusting spring 24, the sharp limit of guide valve seat is connected with tapering 42 contacts, disconnect the oil circuit of the first cavity volume 21 to pilot valve gap 45, make the pressure in the first cavity volume 21 be promoted and make the active force of the pilot valve left and right sides be able to balance.When the guide valve seat point limit of guide valve seat 5 contacts with tapering 42, guide valve core 4 is moved to the left the impact of snubber guide valve seat 5 under the effect of damping spring 23, reduce the percussion of guide valve seat 5, in the process of closing at pilot valve, guide valve seat 5 is moved to the left, cause the volume of the second cavity volume 22 to increase, hydraulic oil is entered from the first cavity volume 21 and is entered into the second cavity volume 22 by oil circuit between chamber 44, due to the damping function of the pilot valve throttle orifice 46 on oil circuit between chamber 44, can slow down the inflow of hydraulic oil, also can slow down the travelling speed of guide valve seat 5, thereby can further reduce the impact of guide valve seat to guide valve core, extend the working life of pilot valve.Due to the leading role of guide portion 41, can not there is offset collisions radially between guide valve core 4 and guide valve seat 5 and produce noise in guide valve core 4, therefore the opening mechanism operational noise in the present embodiment is little.Can change by rotary nut 9 in the present embodiment the position of the spacing adjustable side of adjustable lever 8, when guide valve core 4 contacts with adjustable lever 8 in the present invention, pilot valve is opened, spacing adjustable side is in different positions, when guide valve core 4 contacts from adjustable lever 8, guide valve seat 5 is different to the reduction length of pressure adjusting spring 24, also there is different cracking pressures, for example, when rotary nut 9 moves right adjustable lever, pilot valve moves right under the effect of hydraulic oil, when guide valve core 4 contacts with adjustable lever 8, the reduction length of pressure adjusting spring 24 increases, therefore the cracking pressure of pilot valve also increases, in like manner, when rotary nut 9 is moved to the left the spacing adjustable side of adjustable lever 8, during the contacting of guide valve core 4 and adjustable lever 8, the reduction length of pressure adjusting spring 24 reduces and cracking pressure is reduced, therefore this enforcement can be passed through the cracking pressure of rotary nut 9 conveniently adjusted pilot valves.
Embodiment 2:
As shown in Figure 3, compared with embodiment 1, the difference of the pilot opening mechanism in the present embodiment is controlling device, in the present embodiment, the end face of the spacing adjustable side of adjustable lever 8 has end face oil groove 83, and when guide valve core 4 is connected with adjustable lever 8 contacts, between chamber, oil circuit is communicated with the second cavity volume by end face oil groove 83.Other one end at adjustable lever 8 is provided with screw thread, form and be threaded with valve pocket 12, on the end face of threaded end, be provided with interior hexagonal counterbore 84, for using apparatus rotation adjustable lever 8, and the improper rotation of establishing fastening screw nut 9 and prevent adjustable lever at the threaded end of adjustable lever 8.
Embodiment 3:
As shown in Figure 4, compared with embodiment 1, the difference of the pilot opening mechanism in the present embodiment is valve body and guide valve seat, in the present embodiment, valve body consists of valve seat 15 and valve pocket 12 bolts, left section of guide valve seat 5 coordinates with the sidewall of the inner chamber of valve seat, the pilot valve filler opening 13 arranging on valve seat 15 is communicated with respectively the first cavity volume 21 and radial direction through hole 51 with pilot valve oil outlet 14, the right side of guide valve seat is provided with cavity, the side sliding fit of the sidewall of cavity and adjustable lever 8 and form the second cavity volume 22 between pilot valve and adjustable lever 8, wherein adjustable lever 8 and the diameter of guide valve seat 5 cooperation places are less than the diameter of left section of guide valve seat 5 and valve seat 15 intracavity sidewall cooperation places.
Embodiment 4:
As shown in Figure 5, compared with embodiment 3, the difference of the pilot opening mechanism in the present embodiment is in the formation of adjustable lever, in the present embodiment, adjustable lever comprises two sections, spacing section 85 of coordinating with guide valve seat 5 of the first, another section be with valve pocket 12 on the adjusting section 86 of adjustable lever mounting hole sliding fit, in the termination that regulates section, being provided with spherojoint 87 is connected with spacing section 85 contact, allow to regulate section 86 to rotate within the scope of several angle with spacing section 85, can reduce like this valve seat 15 inner chambers, guide valve seat 5 and adjustable lever 8, the coaxality requirement of adjustable lever mounting hole, reduce difficulty of processing, prevent that guide valve seat 5 is conditioned bar and blocks.
Embodiment 5:
As shown in Figure 6, compared with embodiment 1, the difference of the pilot opening mechanism in the present embodiment is: the spacing shoulder 16 that is provided with annular on the sidewall of the first cavity volume 21, at the afterbody of guide valve core 4, be provided with spacing preiection 47, when guide valve core 4 moves right, spacing preiection 47 can contact with spacing shoulder 16, thereby the stroke final position to the right of restriction guide valve core 4, in the second cavity volume 22, pressure adjusting spring 24 is connected with adjustable lever 8 contacts, can regulate the pretension elastic force of pressure adjusting spring 24 to realize the adjusting of different cracking pressures by rotary nut 9, in the present embodiment, when after spacing preiection 47 contacts with spacing shoulder 16, guide valve seat 5 continues to move right, pilot valve is opened.
Claims (10)
1. an adjustable hydraulic pilot opening mechanism, it is characterized in that, comprise a valve body, in valve body, establish a valve pocket, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume (21), opposite side has the second cavity volume (22), the first cavity volume (21) is communicated with the pilot valve filler opening (13) on valve body, the axial area of the interior liquid effects of the first cavity volume (21) on pilot valve is greater than the axial area of (22) liquid effects on pilot valve in the second cavity volume, in pilot valve, be provided with oil circuit (44) between the chamber that is communicated with the first cavity volume (21) and the second cavity volume (22), described pilot valve comprises guide valve core (4) and guide valve seat (5), described guide valve seat (5) and valve pocket sidewall sliding fit, guide valve seat (5) is provided with an axial pilot valve hole that connects guide valve seat, described guide valve core (4) comprises the guide portion (41) of head, the tapering (42) of afterbody, connect the joint (43) of guide portion (41) and tapering (42), described guide portion (41) and described pilot valve hole sliding fit, between described joint (43) and pilot valve hole hole wall, there is pilot valve gap (45), described tapering (42) is positioned at the first cavity volume (21), when tapering (42) disengages with guide valve seat point limit, the first cavity volume (21) is communicated with pilot valve gap (45), guide valve seat (5) is provided with the radial direction through hole (51) that is communicated with pilot valve gap (45), valve body is provided with the pilot valve oil outlet (14) that is communicated with radial direction through hole (51), in described the first cavity volume (21), be provided with damping spring (23), one end of described damping spring (23) is connected with described guide valve core (4) and guide spool (4) applies towards the elastic force of the second cavity volume (22) direction, in the second cavity volume (22) side, establish pressure adjusting spring (24) and controlling device, one end of described pressure adjusting spring (24) is connected with guide valve seat (5) contact, the other end is connected with valve body contact, described controlling device makes guide valve core (4) be less than guide valve seat (5) to the second cavity volume (22) direction shift motion and can regulate guide valve core (4) stroke final position to the shift motion of the second cavity volume (22) direction.
2. adjustable hydraulic pilot opening mechanism according to claim 1, is characterized in that, is provided with pilot valve throttle orifice (46) on oil circuit between described chamber (44).
3. adjustable hydraulic pilot opening mechanism according to claim 1, it is characterized in that, described controlling device comprises adjustable lever (8), one end of described adjustable lever (8) is to contact the spacing adjustable side being connected, the connecting end that the other end is connected with valve body by screw mechanism with the guide portion of guide valve core (41) termination.
4. adjustable hydraulic pilot opening mechanism according to claim 3, it is characterized in that, described screw mechanism comprises and is arranged on the adjustable lever mounting hole of connecting valve inside and outside on valve body and is arranged on the regulating nut (9) that mounting hole outside and valve body are spirally connected, and the connecting end of described adjustable lever (8) contacts and is connected with mounting hole sliding fit and with regulating nut (9).
5. adjustable hydraulic pilot opening mechanism according to claim 3, it is characterized in that, described screw mechanism comprises the adjustable lever mounting hole that is arranged on connecting valve inside and outside on valve body, the connecting end of described adjustable lever (8) is arranged in mounting hole, connecting end and the mounting hole hole wall of adjustable lever (8) are provided with the screw thread cooperatively interacting, and are provided with inner hexagonal hole (84) on the end face of adjustable lever connecting end.
6. adjustable hydraulic pilot opening mechanism according to claim 3, it is characterized in that, the end face of the contiguous controlling device of described guide valve seat is provided with a cavity, and the sidewall of described cavity coordinates described the second cavity volume of formation (22) with the side of described adjustable lever (8).
7. according to the adjustable hydraulic pilot opening mechanism described in any one in claim 1 to 6, it is characterized in that, oil circuit between described chamber (44) is arranged on guide valve seat.
8. according to the adjustable hydraulic pilot opening mechanism described in any one in claim 3 to 6, it is characterized in that, oil circuit between described chamber (44) arranges on guide valve core, and the spacing adjustable side of described adjustable lever is provided with from the logical oily passage that end face flows into, flow out side.
9. an adjustable hydraulic pilot opening mechanism, it is characterized in that, comprise a valve body, in valve body, establish a valve pocket, the sliding pilot valve of establishing in valve pocket, one side of pilot valve is the first cavity volume (21), opposite side has the second cavity volume (22), the first cavity volume (21) is communicated with the pilot valve filler opening (13) on valve body, the axial area of the interior liquid effects of the first cavity volume (21) on pilot valve is greater than the axial area of (22) liquid effects on pilot valve in the second cavity volume, in pilot valve, be provided with oil circuit (44) between the chamber that is communicated with the first cavity volume (21) and the second cavity volume (22), described pilot valve comprises guide valve core (4) and guide valve seat (5), described guide valve seat (5) and valve pocket sidewall sliding fit, guide valve seat (5) is provided with an axial pilot valve hole that connects guide valve seat, described guide valve core (4) comprises the guide portion (41) of head, the tapering (42) of afterbody, connect the joint (43) of guide portion (41) and tapering (42), described guide portion (41) and described pilot valve hole sliding fit, between described joint (43) and pilot valve hole hole wall, there is pilot valve gap (45), described tapering (42) is positioned at the first cavity volume (21), when tapering (42) disengages with guide valve seat point limit, the first cavity volume (21) is communicated with pilot valve gap (45), guide valve seat (5) is provided with the radial direction through hole (51) that is communicated with pilot valve gap (45), valve body is provided with the pilot valve oil outlet (14) that is communicated with radial direction through hole (51), in described the first cavity volume (21), be provided with damping spring (23), one end of described damping spring (23) is connected with described guide valve core (4) and guide spool (4) applies towards the elastic force of the second cavity volume (22) direction, in the second cavity volume (22) side, be provided with pressure adjusting spring (24), adjustable diameter and screw adjusting mechanism, one end of described pressure adjusting spring (24) is connected with guide valve seat (5) contact, the other end is connected and can be regulated by adjustable diameter and screw adjusting mechanism the pretension elastic force of pressure adjusting spring (24) with adjustable diameter and screw adjusting mechanism, on the sidewall of the first cavity volume (21), be provided with spacing shoulder (16), in the tapering (42) of guide valve core, be provided with and the spacing preiection (47) of spacing shoulder (16) Corresponding matching restriction guide valve core to the second cavity volume direction shift motion.
10. adjustable hydraulic pilot opening mechanism according to claim 9, it is characterized in that, adjustable diameter and screw adjusting mechanism comprises adjustable lever (8), on valve body, be provided for the pilot hole of adjustable lever (8) sliding fit, be arranged on the nut (9) that pilot hole outside is connected with valve body screw thread, the inner end of described adjustable lever (8) is connected with pressure adjusting spring (24) contact, and outer end is connected with nut (9) contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367707.2A CN102454652B (en) | 2011-11-18 | 2011-11-18 | Adjustable hydraulic pilot opening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367707.2A CN102454652B (en) | 2011-11-18 | 2011-11-18 | Adjustable hydraulic pilot opening mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102454652A CN102454652A (en) | 2012-05-16 |
| CN102454652B true CN102454652B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110367707.2A Active CN102454652B (en) | 2011-11-18 | 2011-11-18 | Adjustable hydraulic pilot opening mechanism |
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| Country | Link |
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| CN (1) | CN102454652B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104653538B (en) * | 2015-02-06 | 2018-03-13 | 东西方(宁海)航空科技发展有限公司 | A kind of unstressed valve body structure |
| CN107676506B (en) * | 2017-10-30 | 2024-04-23 | 圣邦集团有限公司 | Three-way flow valve with adjustable throttling port |
| CN107725826B (en) * | 2017-11-01 | 2024-05-31 | 联合汽车电子有限公司 | Valve assembly and electromagnetic valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213760U (en) * | 1987-09-25 | 1988-10-12 | 大连工学院 | Guide type safety valve |
| CN2242988Y (en) * | 1996-02-08 | 1996-12-18 | 煤炭科学研究总院北京开采研究所 | Guiding-type safety valve |
| CN1619198A (en) * | 2004-04-21 | 2005-05-25 | 华中科技大学 | Leading type water pressure overflow valve |
| US7730905B2 (en) * | 2003-06-30 | 2010-06-08 | Toyooki Kogyo Co., Ltd. | High pressure valve for hydrogen gas and decompression device for hydrogen gas |
-
2011
- 2011-11-18 CN CN201110367707.2A patent/CN102454652B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213760U (en) * | 1987-09-25 | 1988-10-12 | 大连工学院 | Guide type safety valve |
| CN2242988Y (en) * | 1996-02-08 | 1996-12-18 | 煤炭科学研究总院北京开采研究所 | Guiding-type safety valve |
| US7730905B2 (en) * | 2003-06-30 | 2010-06-08 | Toyooki Kogyo Co., Ltd. | High pressure valve for hydrogen gas and decompression device for hydrogen gas |
| CN1619198A (en) * | 2004-04-21 | 2005-05-25 | 华中科技大学 | Leading type water pressure overflow valve |
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| CN102454652A (en) | 2012-05-16 |
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