CN202971381U - Pressure adjustable buffer overflow valve - Google Patents
Pressure adjustable buffer overflow valve Download PDFInfo
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- CN202971381U CN202971381U CN 201220732174 CN201220732174U CN202971381U CN 202971381 U CN202971381 U CN 202971381U CN 201220732174 CN201220732174 CN 201220732174 CN 201220732174 U CN201220732174 U CN 201220732174U CN 202971381 U CN202971381 U CN 202971381U
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Abstract
The utility model discloses a pressure adjustable buffer overflow valve which comprises a valve body and a valve core installed in a valve cavity of the valve body in a sliding mode, wherein a valve core reset spring is sleeved in the valve core, an oil outlet and an oil discharging port which are communicated with the valve cavity are respectively arranged on the valve body, a valve base in liquid sealing butting matching with the valve core is arranged on a valve port of the valve cavity, a pressure oil port is arranged on the valve base, an assembling cavity is arranged on the rear section of the valve cavity in coaxial expanding mode, an adjusting thread sleeve for adjusting buffer pre-tightening pressure of the valve core reset spring in a spiral mode and with the length extending out of the assembling cavity is assembled in the assembling cavity in the spiral mode, a buffer piston assembly forming a secondary buffer assembly structure with the valve core in matching mode is sleeved in the adjusting thread sleeve in guiding mode, a front section body in inserting assembly is arranged in the valve body, the oil outlet and the oil discharging port are both arranged in the front section body of the valve body, and the valve core can open or close a connection channel between a pressure oil port and the oil outlet in a horizontal sliding mode to achieve the purpose of eliminating or absorbing hydraulic pulse of the pressure oil port.
Description
Technical field
The utility model relates to the hydraulic control technology in engineering machinery, particularly a kind of buffer overflow valve for hydraulic system, specifically a kind of adjustable-pressure buffer overflow valve.
Background technique
Hydraulic rotary motor on well-known engineering machinery excavator because the reason of inertia can cause system's hydraulic pressure moment eustasy to produce pressure surge, thereby brings larger impact to hydraulic system in starting and the process that stops.This impact greatly reduces the manoeuvring performance of excavator, and severe patient even can damage other hydraulic unit in hydraulic system, causes machine life to shorten.In prior art, buffer relief valve is installed in hydraulic system usually is used for pressure pulse in buffer system to improve the manoeuvring performance of equipment.But common buffer relief valve not only pipeline linker is complicated; and be arranged in the pipeline of system and can not bring into play better the overflow protective action; moreover its secondary overflow compensator or trimmer pressure of common buffer relief valve is set when dispatching from the factory usually; general being difficult to or the very inconvenient manual tune of carrying out according to actual needs again; therefore can not eliminate better with absorption system in compression shock, satisfy the usage requirement of current hydraulic rotary motor.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned prior art present situation, has compact structure, stable performance and a kind of adjustable-pressure buffer overflow valve easy to adjust are installed easily and provide.This relief valve volume is little, lightweight and can directly be inserted on hydraulic rotary motor, eliminates, absorbs the compression shock that brings because of main frame revolution inertia itself, makes the main frame revolution reach that starting is steady, the effect stably of stopping.
the utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of adjustable-pressure buffer overflow valve, comprise that valve body and slip are fitted in the spool in the valve body valve pocket, valve core housing is equipped with the valve core reset spring, be shaped with respectively the oil outlet and the drain tap that are communicated with valve pocket on valve body, and the accent of this valve pocket is fitted with the valve seat that coordinates with spool liquid sealing apical grafting, valve seat is shaped with the pressure hydraulic fluid port, the coaxial expansion of the back segment of valve pocket is shaped with assembly cavity, in this assembly cavity, spiral is fitted with length and extends the adjusting silk braid that assembly cavity is used for adjustable diameter and screw adjusting valve core reset spring buffering preload pressure, and in this adjusting silk braid, guide sleeve is equipped with to be slidably matched with spool and consists of the damper piston assembly with two-stage buffering composite structure, valve body is shaped with the equipped front segment body of plug-in type, oil outlet and drain tap all are positioned on the front segment body of valve body, the spool formula that horizontally slips open or occluding pressure hydraulic fluid port and oil outlet between connecting passage, reach the purpose of elimination and absorption pressure hydraulic fluid port hydraulic impulse.
For optimizing technique scheme, the concrete measure of taking also comprises:
above-mentioned damper piston assembly comprises damper piston and piston bushing, damper piston is shaped with the cylinder-piston chamber of joining with spool liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber between this cylinder-piston chamber and spool ear end face, the center, the back side of described damper piston seal boss is shaped with the traveller that extends back, the traveller guiding of piston bushing and damper piston is slided to be nested and is joined, and be formed with secondary hydraulic cushion chamber between the back side of piston bushing and damper piston seal boss, damper piston is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber and secondary hydraulic cushion chamber, the radial hole that is shaped with on the axial bore that this oil inlet passage is shaped with by the bottom surface in cylinder-piston chamber and traveller forms.
above-mentioned adjusting silk braid is shaped with axial perforation with the slide opening of two road ring-shaped steps, the damper piston assembly is fitted in this slide opening, piston bushing is shaped with the location ring surface, this location ring surface matches with the second annular table terrace location thrust of slide opening, be formed with the damping chamber between the annular front-end face of damper piston seal boss and the first annular step surface, and damper piston is shaped with the radially damping hole that is communicated with one-level hydraulic cushion chamber and damping chamber, the periphery wall in damper piston cylinder-piston chamber and the ring-shaped periphery of seal boss slide with the inwall liquid sealing of the inwall of regulating silk braid first segment slide opening and second section slide opening respectively and match.
In the 3rd joint slide opening of above-mentioned adjusting silk braid, spiral is fitted with screw plug, this screw plug matches with the piston bushing positioning and locking, screw plug is shaped with the cylinder cavity, and the diapire of this cylinder cavity matches with the spacing apical grafting of the breech face of damper piston traveller, and screw plug is set with the first seal ring.
Above-mentioned adjusting silk braid is positioned at the periphery wall of first segment slide opening and is positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening regulates outside thread and locking outside thread, be shaped with the adjusting internal thread suitable with this adjusting outside thread in the assembly cavity of valve body, on the adjusting silk braid, spiral is equipped with locking nut, this locking nut is shaped with and the locking internal thread of locking the outside thread spiral and coordinating, and the apical grafting face of locking nut matches with the valve rear end face of valve body location apical grafting.
be formed with annular space draining passage between the periphery wall of above-mentioned adjusting silk braid second section slide opening and the inwall of valve body assembly cavity, and the periphery wall rear portion of second section slide opening is shaped with the boss body with the sealing circular groove, sealing is equipped with in circular groove for the second seal ring that is sealed and matched with the valve body assembly cavity, regulate the second draining duct that is shaped with respectively axial the first draining duct that is connected with annular space draining passage front port on silk braid and is connected with annular space draining passage rear port, the second draining duct recedes and connects the second section slide opening, piston bushing is shaped with for the draining connecting passage that is communicated with screw plug cylinder cavity and the second draining duct.
Above-mentioned spool comprises valve head body and the valve-rod body that one is connected, and this spool is shaped with the spool oil duct that be used for to be communicated with pressure hydraulic fluid port and one-level hydraulic cushion chamber of axial perforation valve head body and valve-rod body, be positioned at valve head body place in the spool oil duct and be shaped with bore narrow and small damping duct, the valve core reset spring is sleeved on the valve-rod body of spool, one end of this valve core reset spring and valve head body phase apical grafting, its the other end is pressed through pad and the front-end face top of regulating silk braid and is matched, and the cylinder-piston chamber flip sleeve of damper piston fits over the afterbody of valve-rod body.
The outer peripheral surface of above-mentioned spool valve head body slides with the inner circle wall liquid sealing of valve body valve pocket and matches, this valve head body is divided into valve pocket the ante-chamber and the back cavity that is positioned at the valve-rod body rear portion that is positioned at valve head body front portion, drain tap is positioned at back cavity, and the cylinder cavity of screw plug is connected with drain tap through draining connecting passage, the second draining duct, annular space draining passage, the first draining duct and back cavity successively.
Above-mentioned oil outlet is positioned at the ante-chamber that the valve head body is cut apart, the front-end face of described valve head body is shaped with the taper sealing face that coordinates with valve seat pressure hydraulic fluid port peripheral sealing apical grafting, and the connecting passage between pressure hydraulic fluid port and oil outlet is formed by the disengaging of this taper sealing face and valve seat pressure hydraulic fluid port periphery.
Be shaped with on segment body before above-mentioned valve body and facilitate the spiral equipped valve body outside thread of pegging graft, and should front segment body upper in after the valve body outside thread, square set is furnished with the valve seals of plug-in mounting seal action.
compared with prior art, in valve body of the present utility model, spiral is equipped with the adjusting silk braid for regulating spool reset spring buffering preload pressure, can set easily the working pressure of relief valve according to the requirement of system's actual conditions by regulating silk braid, and in the adjusting silk braid, guide sleeve is equipped with to be slidably matched with spool and consists of the damper piston assembly with two-stage buffering composite structure, the two-stage buffer capacity is the pressure pulse of absorption pressure hydraulic fluid port better, reach the purpose of eliminating system pressure impact, and then the working life of improving system's hydraulic element, guarantee that host computer system has good maneuverability.Valve body of the present utility model is shaped with the equipped front segment body of plug-in type, thereby can directly be inserted on hydraulic rotary motor, has greatly simplified the installation procedure of relief valve, has improved the efficiency of assembling of valve.The utility model has the advantages that: structure is bolted and gathers, volume is little, lightweight and pressure is adjustable, and adopts spiral plug-in type project organization to have characteristics easy for installation.
Description of drawings
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the structural representation of valve body in Fig. 1;
Fig. 3 is the assembly structure schematic diagram of spool in Fig. 1;
Fig. 4 is the structural representation of damper piston assembly in Fig. 1;
Fig. 5 regulates the structural representation of silk braid in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is to Figure 5 shows that structural representation of the present utility model.
reference character wherein is: oil outlet B, drain tap T, pressure hydraulic fluid port P, one-level hydraulic cushion chamber E, axial bore E1, damping chamber F, annular space draining passage K, the first draining duct K1, the second draining duct K2, draining connecting passage K3, secondary hydraulic cushion chamber G, radial hole G1, damping hole M radially, the first seal ring O1, the second seal ring O2, valve seals O3, valve body 1, valve pocket 1a, assembly cavity 1b, regulate internal thread 1c, front segment body 11, valve body outside thread 11a, valve rear end face 12, spool 2, spool oil duct 2a, damping duct 2b, valve head body 21, taper sealing face 21b, outer peripheral surface 211, valve-rod body 22, valve core reset spring 3, valve seat 4, regulate silk braid 5, regulate outside thread 5a, locking outside thread 5b, first segment slide opening 51, second section slide opening 52, the first annular step surface 521, boss body 522, sealing circular groove 523, the 3rd joint slide opening 53, the second annular table terrace 531, damper piston assembly 6, damper piston 61, cylinder-piston chamber 61a, annular front-end face 61b, seal boss 611, traveller 612, location ring surface 621, periphery wall 61c, ring-shaped periphery 61d, piston bushing 62, screw plug 7, cylinder cavity 71, pad 8, locking nut 9.
as extremely shown in Figure 5 in Fig. 1, a kind of adjustable-pressure buffer overflow valve of the present utility model, comprise that valve body 1 and slip are fitted in the spool 2 in valve body 1 valve pocket 1a, described spool 2 is set with valve core reset spring 3, wherein: from Fig. 1 in conjunction with seeing Fig. 2, be shaped with respectively the oil outlet B and the drain tap T that are communicated with valve pocket 1a on valve body 1, and the accent of this valve pocket 1a is fitted with the valve seat 4 that coordinates with spool 2 liquid sealing apical graftings, valve seat 4 is shaped with pressure hydraulic fluid port P, the coaxial expansion of the back segment of valve pocket 1a is shaped with assembly cavity 1b, in this assembly cavity 1b, spiral is fitted with length and extends the adjusting silk braid 5 that assembly cavity 1b is used for adjustable diameter and screw adjusting valve core reset spring 3 buffering preload pressures, and in this adjusting silk braid 5, guide sleeve is equipped with to be slidably matched with spool 2 and consists of the damper piston assembly 6 with two-stage buffering composite structure, valve body 1 is shaped with the equipped front segment body 11 of plug-in type, oil outlet B and drain tap T all are positioned on the front segment body 11 of valve body 1, spool 2 is at the connecting passage between left and right sliding type opening or occluding pressure hydraulic fluid port P and oil outlet B under the acting in conjunction of the hydraulic pressure of pressure hydraulic fluid port P and valve core reset spring 3 and damper piston assembly 6, reach the purpose of elimination and absorption pressure hydraulic fluid port P hydraulic impulse.Compare with conventional art, valve body 1 of the present utility model adopts spiral plug-in type project organization, valve body 1 is shaped with the equipped front segment body 11 of plug-in type, as shown in Figure 2, be shaped with on front segment body 11 and facilitate the spiral equipped valve body outside thread 11a that pegs graft, and should before be positioned at the valve seals O3 that square set after valve body outside thread 11a has been furnished with the plug-in mounting seal action on segment body 11.Thereby the utility model can directly be inserted on hydraulic rotary motor, and easy installation and removal has been broken away from traditional relief valve installation procedure complicated, connects the present situation of difficulty.Be equipped with in the assembly cavity 1b of the utility model valve body 1 simultaneously and regulate silk braid 5, by regulating silk braid 5 preload pressure of regulation relief valve very easily, reached the adjustable purpose of pressure.Being set with in adjusting silk braid 5 is slidably matched with spool 2 consists of the damper piston assembly 6 with two-stage buffering composite structure, the two-stage buffer capacity is the pressure pulse of absorption pressure hydraulic fluid port P better, reach the purpose of eliminating system pressure impact, and then the working life of improving system's hydraulic element, guarantee that host computer system has good maneuverability.The utlity model has structure be bolted gather, volume is little, lightweight and pressure is adjustable characteristics.Can eliminate better and the absorption system pressure pulse, the main frame revolution be reached start steady, the effect stably of stopping
in embodiment, as shown in Figure 4, damper piston assembly 6 comprises damper piston 61 and piston bushing 62, damper piston 61 is shaped with the cylinder-piston chamber 61a that joins with spool 1 liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber E between this cylinder-piston chamber 61a and spool 2 ear end faces, the center, the back side of damper piston 61 seal bosses 611 is shaped with the traveller 612 that extends back, piston bushing 62 slides to be nested with traveller 612 guiding of damper piston 61 and joins, and be formed with secondary hydraulic cushion chamber G between the back side of piston bushing 62 and damper piston 61 seal bosses 611, damper piston 61 is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber E and secondary hydraulic cushion chamber G, the radial hole G1 that is shaped with on the axial bore (E1) that this oil inlet passage is shaped with by the bottom surface of cylinder-piston chamber 61a and traveller 612 forms.Damper piston assembly 6 and spool 2 coordinate the overflow buffer structure that has consisted of two-stage type, when the pressure pulse of pressure hydraulic fluid port P when reaching first-level buffer pressure or level 2 buffering pressure, make spool 2 can have different keying effects, to guarantee to eliminate better the pressure pulse with absorption pressure hydraulic fluid port P.
ask for an interview Fig. 5 and in conjunction with Fig. 1 and Fig. 4, adjusting silk braid 5 of the present utility model is shaped with axial perforation with the slide opening of two road ring-shaped steps, damper piston assembly 6 is fitted in this slide opening, the piston bushing 62 of damper piston assembly 6 is shaped with location ring surface 621, this location ring surface 621 matches with the second annular table terrace 531 location thrusts of slide opening, the annular front-end face 61b of damper piston 61 seal bosses 611 and the first 521 of annular step surfaces are formed with damping chamber F, and damper piston 61 is shaped with the radially damping hole M that is communicated with one-level hydraulic cushion chamber E and damping chamber F, the periphery wall 61c of damper piston 61 cylinder-piston chamber 61a and the ring-shaped periphery 61d of seal boss 611 slide with the inwall liquid sealing of the inwall of regulating silk braid 5 first segment slide openings 51 and second section slide opening 52 respectively and match.
In embodiment, in the 3rd joint slide opening 53 of adjusting silk braid 5, spiral is fitted with screw plug 7, this screw plug 7 matches with piston bushing 62 positioning and lockings, screw plug 7 is shaped with cylinder cavity 71, the diapire of this cylinder cavity 71 matches with the spacing apical grafting of breech face of damper piston 61 travellers 612, and screw plug 7 is set with the first seal ring O1.Be shaped with internal thread in the 3rd joint slide opening 53 of adjusting silk braid 5, be shaped with the outside thread that is mated on the outer circumferential face of screw plug 7, screw plug 7 screw-tightened clamping piston linings 62 guarantee that piston bushing 62 can not rotate or slide displacement.
See also Fig. 5 and Fig. 2, in embodiment, adjusting silk braid 5 of the present utility model is at the periphery wall that is positioned at first segment slide opening 51 and be positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening 53 and regulate outside thread 5a and locking outside thread 5b, be shaped with the adjusting internal thread 1c suitable with this adjusting outside thread 5a in the assembly cavity 1b of valve body 1, regulate the upper spiral of silk braid (5) locking nut 9 is installed, this locking nut 9 is shaped with and the locking internal thread of locking outside thread 5b spiral and coordinating, and the apical grafting face of locking nut 9 matches with the valve rear end face of valve body 1 12 location apical graftings.The Main Function of locking nut 9 is after adjusting silk braid 5 sets preload pressure, will regulate silk braid 5 lockings, prevents from regulating silk braid 5 rotations and gets loose.
as Fig. 1 and shown in Figure 5, be formed with annular space draining passage K between the periphery wall of adjusting silk braid 5 second section slide openings 52 and the inwall of valve body 1 assembly cavity 1b, and the periphery wall rear portion of second section slide opening 52 is shaped with the boss body 522 with sealing circular groove 523, sealing is equipped with in circular groove 523 for the second seal ring O2 that is sealed and matched with valve body 1 assembly cavity 1b, regulate on silk braid 5 and be shaped with respectively axial the first draining duct K1 that is connected with annular space draining passage K front port and the second draining duct K2 that is connected with annular space draining passage K rear port, the second draining duct K2 recedes and connects second section slide opening 52.See also Fig. 4, piston bushing 62 is shaped with for the draining connecting passage K3 that is communicated with screw plug 7 cylinder cavitys 71 and the second draining duct K2.
in embodiment, as shown in Figure 3, spool 2 comprises valve head body 21 and the valve-rod body 22 that one is connected, and this spool 2 is shaped with the spool oil duct 2a that is used for being communicated with pressure hydraulic fluid port P and one-level hydraulic cushion chamber E of axial perforation valve head body 21 and valve-rod body 22, be positioned at valve head body 21 places in spool oil duct 2a and be shaped with the narrow and small damping duct 2b of bore, valve core reset spring 3 is sleeved on the valve-rod body 22 of spool 2, one end of this valve core reset spring 3 and valve head body 21 phase apical graftings, its the other end pushes up to press through pad 8 and the front-end face of regulating silk braid 5 and matches, the cylinder-piston chamber 61a flip sleeve of damper piston 61 fits over the afterbody of valve-rod body 22.Regulate silk braid 5 and control spool reset spring 3 pressure by spiral, reach the purpose of regulation relief valve oil pressure relief.
The outer peripheral surface 211 of spool 2 valve head bodies 21 of the present utility model slides with the inner circle wall liquid sealing of valve body 1 valve pocket 1a and matches, this valve head body 21 is divided into valve pocket the ante-chamber and the back cavity that is positioned at valve-rod body 21 rear portions that is positioned at valve head body 21 front portions, drain tap T is positioned at back cavity, the cylinder cavity 71 in the namely residing chamber of valve core reset spring 3, and screw plug 7 is connected with drain tap T through draining connecting passage K3, the second draining duct K2, annular space draining passage K, the first draining duct K1 and back cavity successively.The Main Function of drain tap T is the hydraulic oil that leaks cylinder cavity 71 and back cavity for giving off, and to guarantee sensitivity and the stability of valve events, improves the reliability of relief valve operation.
In embodiment, as shown in Figure 3, oil outlet B is positioned at the ante-chamber that valve head body 21 is cut apart, the front-end face of valve head body 21 is shaped with the taper sealing face 21b that coordinates with valve seat 4 pressure hydraulic fluid port P peripheral sealing apical graftings, and above-mentioned pressure hydraulic fluid port P and the connecting passage between oil outlet B are formed by the disengaging of this taper sealing face 21b and valve seat 4 pressure hydraulic fluid port P peripheries.
working principle of the present utility model as shown in Figure 1, when pressure oil enters pressure hydraulic fluid port P, pressure oil acts on spool 2 valve head bodies 21, pressure oil enters one-level hydraulic cushion chamber E and secondary hydraulic cushion chamber G through damping duct 2b and the spool oil duct 2a in spool 2, the pressure oil of one-level hydraulic cushion chamber E enters damping chamber F through the radially damping hole M on damper piston 61 simultaneously, act on pressure on spool 2 valve head bodies 21 and overcome active force and one-level hydraulic cushion chamber E pressure under valve core reset spring 3 assembling conditions, spool 2 is moved right, the seal perimeter of the taper sealing face 21b of spool 2 valve head bodies 21 and valve seat 4 pressure hydraulic fluid port P breaks away from the connecting passage between mineralization pressure hydraulic fluid port P and oil outlet B, the pressure oil of pressure hydraulic fluid port P enters oil outlet B, meanwhile the pressure of secondary hydraulic cushion chamber G overcomes damping chamber F, the pressure of one-level hydraulic cushion chamber E and the active force of valve core reset spring 3, promoting damper piston 61 is moved to the left, because the fluid in damping chamber F is by radially damping hole M outflow, therefore the 61 displacement times of damper piston have been extended, play the effect that delays the pressure rise time, compression spool reset spring 3 when damper piston 61 moves to left, valve core reset spring 3 active forces are increased gradually, this moment pressure hydraulic fluid port P pressure along with the increase of valve core reset spring 3 active forces also rising, when damper piston 61 moves on to high order end, the pressure that acts on simultaneously on spool 2 valve-rod body 22 ear end faces also progressively raises, act on the spring force on spool 2 and act on pressure on valve-rod body 22 ear end faces and jointly overcome pressure hydraulic fluid port P and act on pressure on spool 2, spool 2 is moved to the left, until spool 2 is closed the connecting passage between pressure hydraulic fluid port P and oil outlet B, be cut off between pressure hydraulic fluid port P and oil outlet B.Enter pressure hydraulic fluid port P from pressure oil, spool 2 is opened, damper piston 61 moves left to last spool 2 and closes, and whole process is very of short duration, and the main purpose that realizes extends the pressure rise time exactly, absorb the pressure pulse of P mouth, be equivalent to system pressure is played a buffer function.
The utility model has the advantages that: pressure is adjustable, structure is bolted and gathers, volume is little, lightweight, thread type plug-in mounting structure, easy for installation.
The beneficial effects of the utility model are: eliminate the system pressure pulse, thereby improve the manoeuvring performance of system's hydraulic pressure component life and main frame.
Claims (10)
1. adjustable-pressure buffer overflow valve, comprise that valve body (1) and slip are fitted in the spool (2) in valve body (1) valve pocket (1a), described spool (2) is set with valve core reset spring (3), it is characterized in that: be shaped with respectively the oil outlet (B) and the drain tap (T) that are communicated with valve pocket (1a) on described valve body (1), and the accent of this valve pocket (1a) is fitted with the valve seat (4) that coordinates with spool (2) liquid sealing apical grafting, described valve seat (4) is shaped with pressure hydraulic fluid port (P), the coaxial expansion of back segment of described valve pocket (1a) is shaped with assembly cavity (1b), the middle spiral of this assembly cavity (1b) is fitted with length and extends the adjusting silk braid (5) that assembly cavity (1b) is used for adjustable diameter and screw adjusting valve core reset spring (3) buffering preload pressure, and in this adjusting silk braid (5), guide sleeve is equipped with to be slidably matched with spool (2) and consists of the damper piston assembly (6) with two-stage buffering composite structure, described valve body (1) is shaped with the equipped front segment body (11) of plug-in type, described oil outlet (B) and drain tap (T) all are positioned on the front segment body (11) of valve body (1).
2. a kind of adjustable-pressure buffer overflow valve according to claim 1, it is characterized in that: described damper piston assembly (6) comprises damper piston (61) and piston bushing (62), described damper piston (61) is shaped with the cylinder-piston chamber (61a) of joining with spool (1) liquid sealing flip sleeve, be formed with one-level hydraulic cushion chamber (E) between this cylinder-piston chamber (61a) and spool (2) ear end face, the center, the back side of described damper piston (61) seal boss (611) is shaped with the traveller (612) that extends back, described piston bushing (62) slides to be nested with traveller (612) guiding of damper piston (61) and joins, and be formed with secondary hydraulic cushion chamber (G) between the back side of piston bushing (62) and damper piston (61) seal boss (611), described damper piston (61) is shaped with the oil inlet passage that is communicated with one-level hydraulic cushion chamber (E) and secondary hydraulic cushion chamber (G), the radial hole (G1) that is shaped with on the axial bore (E1) that described oil inlet passage is shaped with by the bottom surface in cylinder-piston chamber (61a) and traveller (612) forms.
3. a kind of adjustable-pressure buffer overflow valve according to claim 2, it is characterized in that: described adjusting silk braid (5) is shaped with axial perforation with the slide opening of two road ring-shaped steps, described damper piston assembly (6) is fitted in this slide opening, described piston bushing (62) is shaped with location ring surface (621), this location ring surface (621) matches with the second annular table terrace (531) location thrust of slide opening, be formed with damping chamber (F) between the annular front-end face (61b) of described damper piston (61) seal boss (611) and the first annular step surface (521), and damper piston (61) is shaped with the radially damping hole (M) that is communicated with one-level hydraulic cushion chamber (E) and damping chamber (F), the periphery wall (61c) in described damper piston (61) cylinder-piston chamber (61a) and the ring-shaped periphery (61d) of seal boss (611) slide with the inwall liquid sealing of the inwall of regulating silk braid (5) first segment slide opening (51) and second section slide opening (52) respectively and match.
4. a kind of adjustable-pressure buffer overflow valve according to claim 3, it is characterized in that: in the 3rd joint slide opening (53) of described adjusting silk braid (5), spiral is fitted with screw plug (7), this screw plug (7) matches with piston bushing (62) positioning and locking, described screw plug (7) is shaped with cylinder cavity (71), the diapire of this cylinder cavity (71) matches with the spacing apical grafting of breech face of damper piston (61) traveller (612), and described screw plug (7) is set with the first seal ring (O1).
5. a kind of adjustable-pressure buffer overflow valve according to claim 4, it is characterized in that: described adjusting silk braid (5) is positioned at the periphery wall of first segment slide opening (51) and is positioned to be shaped with respectively on the periphery wall of the 3rd joint slide opening (53) to be regulated outside thread (5a) and locks outside thread (5b), be shaped with the adjusting internal thread (1c) suitable with this adjusting outside thread (5a) in the assembly cavity (1b) of described valve body (1), the upper spiral of described adjusting silk braid (5) is equipped with locking nut (9), this locking nut (9) is shaped with and the locking internal thread of locking outside thread (5b) spiral and coordinating, the apical grafting face of described locking nut (9) is located apical grafting with the valve rear end face (12) of valve body (1) and is matched.
6. a kind of adjustable-pressure buffer overflow valve according to claim 5, it is characterized in that: be formed with annular space draining passage (K) between the inwall of the periphery wall of described adjusting silk braid (5) second section slide opening (52) and valve body (1) assembly cavity (1b), and the periphery wall rear portion of second section slide opening (52) is shaped with the boss body (522) with sealing circular groove (523), be equipped with in described sealing circular groove (523) for and the second seal ring (O2) of being sealed and matched of valve body (1) assembly cavity (1b), be shaped with respectively axial the first draining duct (K1) that is connected with annular space draining passage (K) front port and the second draining duct (K2) that is connected with annular space draining passage (K) rear port on described adjusting silk braid (5), described the second draining duct (K2) recedes and connects second section slide opening (52), described piston bushing (62) is shaped with for the draining connecting passage (K3) that is communicated with screw plug (7) cylinder cavity (71) and the second draining duct (K2).
7. a kind of adjustable-pressure buffer overflow valve according to claim 6, it is characterized in that: described spool (2) comprises valve head body (21) and the valve-rod body (22) that one is connected, and this spool (2) is shaped with the spool oil duct (2a) that is used for being communicated with pressure hydraulic fluid port (P) and one-level hydraulic cushion chamber (E) of axial perforation valve head body (21) and valve-rod body (22), be positioned at valve head body (21) in described spool oil duct (2a) and locate to be shaped with bore narrow and small damping duct (2b), described valve core reset spring (3) is sleeved on the valve-rod body (22) of spool (2), one end of this valve core reset spring (3) and valve head body (21) phase apical grafting, its the other end pushes up to press through pad (8) and the front-end face of regulating silk braid (5) and matches, cylinder-piston chamber (61a) flip sleeve of described damper piston (61) fits over the afterbody of valve-rod body (22).
8. a kind of adjustable-pressure buffer overflow valve according to claim 7, it is characterized in that: the outer peripheral surface (211) of described spool (2) valve head body (21) slides with the inner circle wall liquid sealing of valve body (1) valve pocket (1a) and matches, this valve head body (21) is divided into valve pocket the back cavity that is positioned at the anterior ante-chamber of valve head body (21) and is positioned at valve-rod body (21) rear portion, described drain tap (T) is positioned at back cavity, and the cylinder cavity (71) of described screw plug (7) is successively through draining connecting passage (K3), the second draining duct (K2), annular space draining passage (K), the first draining duct (K1) and back cavity are connected with drain tap (T).
9. a kind of adjustable-pressure buffer overflow valve according to claim 8, it is characterized in that: described oil outlet (B) is positioned at the ante-chamber that valve head body (21) is cut apart, the front-end face of described valve head body (21) is shaped with the taper sealing face (21b) that coordinates with valve seat (4) pressure hydraulic fluid port (P) peripheral sealing apical grafting, and the connecting passage between described pressure hydraulic fluid port (P) and oil outlet (B) is formed by the disengaging of this taper sealing face (21b) and valve seat (4) pressure hydraulic fluid port (P) periphery.
10. a kind of adjustable-pressure buffer overflow valve according to claim 9, it is characterized in that: be shaped with the valve body outside thread (11a) that facilitates spiral to peg graft and be equipped with on the front segment body of described valve body (1) (11), and should be positioned at the valve seals (O3) that the rear square set of valve body outside thread (11a) has been furnished with the plug-in mounting seal action on front segment body (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732174 CN202971381U (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732174 CN202971381U (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
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| CN202971381U true CN202971381U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220732174 Expired - Lifetime CN202971381U (en) | 2012-12-27 | 2012-12-27 | Pressure adjustable buffer overflow valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| CN103899463A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Multi-stage buffer type relief valve |
| CN113280069A (en) * | 2021-05-24 | 2021-08-20 | 山东华伟液压科技有限公司 | Hydraulic shock absorption valve and shock absorber thereof |
| CN114008334A (en) * | 2019-05-02 | 2022-02-01 | 伍德沃德有限公司 | Multi-piece piston |
-
2012
- 2012-12-27 CN CN 201220732174 patent/CN202971381U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| CN103899463A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Multi-stage buffer type relief valve |
| CN103899463B (en) * | 2014-03-28 | 2016-05-04 | 哈尔滨工程大学 | Multi-stage buffer type overflow valve |
| CN114008334A (en) * | 2019-05-02 | 2022-02-01 | 伍德沃德有限公司 | Multi-piece piston |
| CN113280069A (en) * | 2021-05-24 | 2021-08-20 | 山东华伟液压科技有限公司 | Hydraulic shock absorption valve and shock absorber thereof |
| CN113280069B (en) * | 2021-05-24 | 2023-01-17 | 山东华伟液压科技有限公司 | Shock absorber |
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Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Patentee after: SKS HYDRAULIC TECHNOLOGY CO.,LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Patentee before: NINGBO WIDE SKY SKS HYDRAULIC Co.,Ltd. |
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Granted publication date: 20130605 |
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