CN115217882B - Damping control electromagnetic valve - Google Patents
Damping control electromagnetic valve Download PDFInfo
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- CN115217882B CN115217882B CN202210672845.XA CN202210672845A CN115217882B CN 115217882 B CN115217882 B CN 115217882B CN 202210672845 A CN202210672845 A CN 202210672845A CN 115217882 B CN115217882 B CN 115217882B
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- 238000013016 damping Methods 0.000 title claims abstract description 108
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000035939 shock Effects 0.000 description 36
- 239000006096 absorbing agent Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000036316 preload Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/446—Adjustment of valve bias or pre-stress
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The present invention provides a damping control solenoid valve, comprising: the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod; the safety valve comprises a safety valve core, a safety valve spring and a safety valve spring seat; the relief valve spring is compressed between the relief valve spool and the relief valve spring seat; during normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve, the oil pressure in the pilot stage valve is increased to a preset degree to push the safety valve core open for pressure relief, and the elastic force of the safety valve spring adjusts the pressure in the pilot stage valve and the main stage valve. The damping control electromagnetic valve has a stable failure safety mode and good economy.
Description
Technical Field
The invention belongs to the technical field of shock absorption, and particularly relates to a damping control electromagnetic valve.
Background
The shock absorber is used for inhibiting vibration generated by rebound after vibration of the shock absorbing spring and impact from a road surface, is widely applied to automobile shock absorption, and plays a role in damping vibration of a frame and an automobile body so as to improve running smoothness of the automobile. When the automobile passes over uneven road, the shock absorbing spring can filter the vibration of the road, but the shock absorbing spring can reciprocate, and the shock absorber is used for inhibiting the shock absorbing spring from jumping. The shock absorber is internally filled with oil liquid, and is provided with an inner chamber and an outer chamber, the oil liquid can flow through a pore between the two chambers, when the wheel jolts, a piston in the shock absorber can move up and down in the sleeve, and the oil liquid in the chamber can flow back and forth between the two chambers under the action of the reciprocating motion of the piston. The damping control electromagnetic valve controls the size of an oil way switch of the oil to change the reciprocating resistance of the oil between the chambers, thereby realizing the change of damping of the shock absorber.
As shown in fig. 1, a damping control solenoid valve for a shock absorber, which is also called CDC (Continuous Damping Control ) solenoid valve, is composed of a main stage valve 01, a pilot stage valve 02 and an electromagnetic head 03. When the CDC solenoid valve is operated, oil is transferred from the main valve chamber 011 to the pilot chamber 023 through the orifice 013 in the main valve spool 012, and acts on the pilot valve spool 022. When the oil pressure in the pilot chamber 023 and the preload of the pilot spring 021 together can overcome the electromagnetic force generated by the electromagnetic head 03, the pilot spool 022 is opened to generate the flow rate. The pressure in the pilot chamber 023 becomes smaller due to the opening of the pilot stage spool 022, so that the pressure of the main valve chamber 011 is made larger than the pressure of the pilot chamber 023 until the displacement of the main stage spool 012 can be generated, at which time the overflow action starts to be generated. The damping control electromagnetic valve controls the opening and closing of an oil way of the oil liquid, so that the damping force of the shock absorber can be adjusted.
When the CDC solenoid valve is operating normally, i.e., when the current excitation is normal, the pressure of the pilot chamber 023 is determined by the electromagnetic force generated by the solenoid head 03, and the pressure of the main valve chamber 011 is determined by the pressure of the pilot chamber 023. Therefore, the pressure of the main valve cavity 011 can be adjusted by adjusting the current, and the damping force of the shock absorber can be adjusted.
The shock absorber demand is increasing, requiring that the shock absorber have a fail safe mode, i.e. that in case of a current interruption the shock absorber is still able to provide a certain damping force, which is intermediate between the comfort mode and the sport mode.
The failure safety mode of the main stream CDC electromagnetic valve in the market is mainly provided by the following two structures. The first is a ball-type check valve structure, as shown in fig. 2, a ball valve 025 is disposed laterally in the pilot chamber 023 as a check valve for generating back pressure. When the current is interrupted, the oil experiences a pressure drop through the ball valve 025, which in turn creates a certain main pressure. Because the contact area of the ball valve 025 and the valve seat is smaller, the sealing performance of the first structure is poorer, the requirements on the surface processing of the sub-parts of the ball valve 025 and the matched valve seat are higher, the economical efficiency is poorer, and the product cost is high. The second is a throttle gap configuration, as shown in fig. 3, where a throttle is created by the radial gap 026 between the pilot stage spool 024 and the valve sleeve, thereby providing a certain main pressure. The second structure, although omitting part of the structure, is very unstable due to the throttling action of the gap, is very sensitive to the gap-related size and the eccentricity of the pilot stage spool 024, and causes larger difference of failure safety performance between products and low stability in application.
Disclosure of Invention
The invention aims to provide a damping control electromagnetic valve which has a stable failure safety mode and good economy.
The present invention provides a damping control solenoid valve, comprising:
the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod;
The safety valve comprises a safety valve core, a safety valve spring and a safety valve spring seat; the relief valve spring is compressed between the relief valve spool and the relief valve spring seat;
During normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve, the oil pressure in the pilot stage valve is increased to a preset degree to push the safety valve core open for pressure relief, and the elastic force of the safety valve spring adjusts the pressure in the pilot stage valve and the main stage valve.
Further, the damping control electromagnetic valve comprises a shell, an accommodating cavity is formed in the shell along the axial direction of the shell, a safety valve spring seat is fixedly arranged at one end, close to the electromagnetic head, of the shell, and the safety valve core is axially and movably arranged in a safety valve cavity formed by the pilot stage valve, the accommodating cavity and the safety valve spring seat.
Further, the safety valve core is similar to a barrel, and comprises a barrel part and an extension part connected with the barrel part, wherein the extension part extends outwards from the barrel bottom of the barrel part along the axial direction, a barrel opening of the barrel part faces to the safety valve spring seat, through holes penetrating along the axial direction are formed in the barrel bottom and the extension part and are used for penetrating through the push rod, and the push rod is in sliding sealing fit with the through holes;
During normal operation, the extension part is sealed with the end face of the pilot stage valve under the action of the pretightening force of the safety valve spring;
a groove is axially formed in the inner wall of the accommodating cavity of the shell.
Further, the damping control electromagnetic valve comprises a valve sleeve, and a first chamber, a pilot oil hole and a second chamber which are communicated are sequentially formed in the valve sleeve along the axial direction of the valve sleeve.
Further, the main stage valve comprises a main valve seat, a main stage valve core and a main stage spring;
the main valve seat is fixedly arranged at one axial end of the valve sleeve, the main-stage valve core is movably arranged in the first cavity along the axial direction, and the main-stage valve core is provided with a damping hole and a pilot cavity which are communicated with each other along the axial direction; the pilot cavity is internally and coaxially provided with the main-stage spring.
Further, the pilot stage valve comprises a pilot stage spring, a pilot stage valve core and a pilot stage valve seat; the pilot stage valve seat is fixedly arranged at one end of the valve sleeve, and the pilot stage valve core is coaxially and movably arranged in the second cavity formed by the valve sleeve and the pilot stage valve seat.
Furthermore, pilot-stage valve seat through holes penetrating in the axial direction are distributed in the central area of the pilot-stage valve seat, gaps are reserved between the pilot-stage valve seat through holes and the push rods, and projection of the safety valve core on the pilot-stage valve seat covers the pilot-stage valve seat through holes.
Further, the pilot stage valve core comprises a protruding part, a lead part and a connecting part, wherein the protruding part is arranged along the axial direction, the lead part is arranged around the radial circumference of the protruding part, the connecting part is used for connecting the protruding part and the lead part, and a plurality of pilot stage valve core through holes are arranged along the axial direction of the connecting part; the guide part is axially provided with a step at one side close to the guide oil hole, the protruding part is inserted into the inner ring of the guide stage spring, one end of the guide stage spring abuts against the side wall of the second chamber in the valve sleeve at one side close to the guide oil hole, and the other end of the guide stage spring is extruded at the step of the guide part.
Further, the outer wall of the radial circumference of the lead part is in sliding sealing fit with the inner wall of the radial circumference of the second chamber in the valve sleeve; the projection of the protruding portion end face on the side wall of the second cavity, which is close to the pilot oil hole, covers the pilot oil hole.
Further, the damping control electromagnetic valve comprises an electromagnetic head shell, wherein one side of the shell in the axial direction is wrapped in the electromagnetic head shell, and an electromagnetic head is further arranged in the electromagnetic head shell; the pushrod extending from the middle region of the electromagnetic head may contact the pilot stage spool through the relief valve spring seat and the relief valve spool.
The present invention also provides another damping control solenoid valve, including:
the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod;
the safety valve comprises a safety valve sleeve, a safety valve core, a safety valve spring and a safety valve seat; the safety valve spring is extruded between the safety valve sleeve and the safety valve core;
During normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve;
When the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve; the oil in the pilot stage valve is increased to a preset degree, sequentially passes through the clearance between the safety valve sleeve and the push rod and the clearance between the safety valve core and the push rod, and enters an adjusting cavity formed by the safety valve core and a safety valve spring seat, and the oil pressure in the adjusting cavity acts on the outer end face of the safety valve core to enable the safety valve core to move to one side of the pilot stage valve, so that the pressure in the pilot stage valve and the main stage valve is adjusted.
Further, the safety valve sleeve is similar to a barrel, a barrel opening of the safety valve sleeve faces the safety valve seat, a safety valve sleeve through hole is formed in the barrel bottom of the safety valve sleeve and used for penetrating the push rod, and a gap is formed between the push rod and the safety valve sleeve through hole;
The safety valve core is axially and movably arranged in the safety valve sleeve, the safety valve core is similar to a barrel, a barrel opening of the safety valve core faces to the barrel bottom of the safety valve sleeve, and the barrel outer wall of the safety valve core is in sliding sealing fit with the barrel inner wall of the safety valve sleeve; the barrel bottom of the safety valve core is provided with a safety valve core through hole for penetrating through the push rod, and a gap is arranged between the push rod and the safety valve core through hole.
Further, the barrel bottom of the safety valve core extends to one side far away from the barrel opening along the axial direction to form an extension part, and the outer side end surface of the barrel bottom of the safety valve core, the extension part and the safety valve seat enclose the adjusting cavity.
Further, the safety valve spring is coaxially arranged, one end of the safety valve spring abuts against the barrel bottom of the safety valve sleeve, and the other end of the safety valve spring abuts against the barrel bottom of the safety valve core.
Further, the damping control electromagnetic valve comprises a valve sleeve, a first chamber, a pilot oil hole and a second chamber which are communicated are formed in the valve sleeve in sequence along the axial direction, the main stage valve is arranged in the first chamber, and the pilot stage valve is arranged in the second chamber.
Further, one side of the valve sleeve, which is far away from the main stage valve, is sleeved in a shell, a chamber III is axially arranged in the shell, and one end of the shell, which is far away from the valve sleeve, is fixedly provided with the safety valve seat; the valve sleeve and the shell are coaxially arranged, and the radial dimension of the second chamber is the same as that of the third chamber; the safety valve sleeve is fixedly arranged in the communicated second chamber and the communicated third chamber in the coaxial direction.
Further, the main stage valve comprises a main valve seat, a main stage valve core and a main stage spring; the main valve seat is fixedly arranged at one axial end of the valve sleeve, the main-stage valve core is movably arranged in the first cavity in the same axial direction, and the main-stage valve core is provided with a damping hole and a pilot cavity which are communicated with each other along the axial direction; the pilot cavity is internally and coaxially provided with the main-stage spring.
Compared with the prior art, the invention has the following beneficial effects:
the present invention provides a damping control solenoid valve, comprising: the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod; the safety valve comprises a safety valve core, a safety valve spring and a safety valve spring seat; the relief valve spring is compressed between the relief valve spool and the relief valve spring seat; during normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve, the oil pressure in the pilot stage valve is increased to a preset degree to push the safety valve core open for pressure relief, and the elastic force of the safety valve spring adjusts the pressure in the pilot stage valve and the main stage valve. The damping control electromagnetic valve has a stable failure safety mode and good economy.
The present invention also provides another damping control solenoid valve, including:
the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod;
the safety valve comprises a safety valve sleeve, a safety valve core, a safety valve spring and a safety valve seat; the safety valve spring is extruded between the safety valve sleeve and the safety valve core;
During normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve;
When the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve; the oil in the pilot stage valve is increased to a preset degree, sequentially passes through the clearance between the safety valve sleeve and the push rod and the clearance between the safety valve core and the push rod, and enters an adjusting cavity formed by the safety valve core and a safety valve spring seat, and the oil pressure in the adjusting cavity acts on the outer end face of the safety valve core to enable the safety valve core to move to one side of the pilot stage valve, so that the pressure in the pilot stage valve and the main stage valve is adjusted. The damping control electromagnetic valve has a stable failure safety mode and good economy.
Drawings
FIG. 1 is a schematic diagram of a damping control solenoid valve.
FIG. 2 is a schematic diagram of a damping control solenoid valve with a ball check fail safe function.
FIG. 3 is a schematic diagram of a damping control solenoid valve with a throttle clearance fail safe function.
FIG. 4 is a schematic diagram of a damping control solenoid valve according to a first embodiment of the present invention.
Fig. 5 is an enlarged schematic view of the pilot stage valve of fig. 4.
Fig. 6 is an enlarged schematic view of the safety valve of fig. 4.
FIG. 7 is a schematic diagram of a damping control solenoid valve and a shock absorber according to a first embodiment of the present invention.
FIG. 8 is a schematic diagram of a damping control solenoid valve according to a second embodiment of the present invention.
Fig. 9 is an enlarged schematic view of the safety valve of fig. 8.
Wherein, the reference numerals are as follows:
01-main stage valve; 011—main valve cavity; 012-primary spool; 013-damping holes; 014—a primary spring; 02-pilot stage valve; 021-pilot stage spring; 022-pilot stage spool; 023—a pilot chamber; 024-pilot stage spool; 025-ball valve; 026-gap; 03-electromagnetic head.
10-A damping control solenoid valve; 11-main stage valve; 111-a main valve cavity; 112-a main stage spool; 113-a damping hole; 114-primary springs; 116-main valve port; 117-main valve seat; 12-pilot stage valve; 121-a pilot stage spring; 122-pilot stage spool; 122 a-a boss; 122 b-lead portion; 122 c-a connection; k-leading stage valve core through holes; 123-pilot stage valve seat; l-pilot stage valve seat through holes; 124-a pilot chamber; 125-a pilot oil hole; 126-pilot valve port; 13-a safety valve; 131-a relief valve spring; 132—a safety spool; 132 a-a barrel portion; 132 b-an extension; 133-safety valve port; 134-relief valve spring seat; 14-an electromagnetic head; 141-push rod; 142-an electromagnetic head housing; 15-valve sleeve; 16-an oil outlet; 17-a housing.
20-A shock absorber; 21-a piston; 22-upper chamber; 23-lower chamber; 24-an intermediate chamber; 25-compensating cavity; 26-a compensation valve; 27-a flow-through valve; c 1 -first chamber; c 2 -a second chamber; c 3 -a containing cavity; v-grooves; f 1 -first pilot valve seat end face; f 2 -a second pilot valve seat end face; f 3 -epitaxial end faces; f 4 -lobe end.
30-A damping control solenoid valve; 33-a safety valve; 331-a safety valve sleeve; 331 a-safety valve sleeve through hole; 332-a safety valve core; 332 a-relief spool through hole; 332 b-extensions; 333-a relief valve spring; 334-relief valve spring seat; 35-valve sleeve; 37-housing; d 1 -chamber one; d 2 -chamber two; d 3 -chamber three; d 4 -adjusting the cavity; f 5 -the outer end face of the safety valve core.
Detailed Description
Based on the above study, an embodiment of the present invention provides a damping control solenoid valve. The invention is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are not to scale precisely, but rather merely for the purpose of facilitating and clearly aiding in the description of the embodiments of the invention.
For ease of description, some embodiments of the application may use spatially relative terms such as "above …," "below …," "top," "below," and the like to describe one element or component's relationship to another element(s) or component(s) as illustrated in the figures of the embodiments. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or components described as "below" or "beneath" other elements or components would then be oriented "above" or "over" the other elements or components. The terms "first," "second," and the like, herein below, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that such terms so used are interchangeable under appropriate circumstances.
The embodiment of the invention provides a damping control electromagnetic valve, which comprises the following components:
the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod; the safety valve comprises a safety valve core, a safety valve spring and a safety valve spring seat; the relief valve spring is compressed between the relief valve spool and the relief valve spring seat; during normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve, the oil pressure in the pilot stage valve is increased to a preset degree to push the safety valve core open for pressure relief, and the elastic force of the safety valve spring adjusts the pressure in the pilot stage valve and the main stage valve.
A damping control solenoid valve according to a first embodiment of the present invention will be described with reference to fig. 4 to 7.
As shown in fig. 4 to 6, the damping control solenoid valve 10 of the embodiment of the present invention includes a main stage valve 11, a pilot stage valve 12, a relief valve 13, and an electromagnetic head 14. The main stage valve 11 includes a main valve seat 117, a main stage spool 112, and a main stage spring 114. The main stage valve 11 is arranged in a valve housing 15. A first chamber C 1, a pilot oil hole 125, and a second chamber C 2 are formed in the valve housing 15 in this order in the axial direction. Illustratively, the bore diameter of the pilot oil bore 125 is smaller than the radial dimension of the first chamber C 1, and the bore diameter of the pilot oil bore 125 is also smaller than the radial dimension of the second chamber C 2.
The main valve seat 117 is fixedly disposed at one axial end of the valve sleeve 15, and the main stage spool 112 is disposed within a first chamber C 1 defined by the valve sleeve 15 and the main valve seat 117. Specifically, the main stage spool 112 is movably disposed in the first chamber C 1 in a coaxial direction, and the main stage spool 112 is provided with a damping hole 113 and a pilot chamber 124 that are communicated in the axial direction. The pilot chamber 124 is coaxially provided with a main stage spring 114, one end of the main stage spring 114 abuts against a central region of the main stage valve core 112, and the other end of the main stage spring 114 abuts against a side wall of the first chamber C 1 in the valve housing 15 on a side away from the main valve seat 117. The main stage spool 112 may be axially movable in the first chamber C 1. The valve sleeve 15 is provided with an oil outlet 16 on the radial circumferential wall on the side close to the main valve seat 117.
The pilot stage valve 12 includes a pilot stage spring 121, a pilot stage spool 122, and a pilot stage valve seat 123. A pilot stage valve seat 123 is provided at an end of the valve sleeve 15 remote from the main valve seat 117, and a pilot stage spool 122 and a pilot stage spring 121 are provided in a second chamber C 2 formed by the valve sleeve 15 and the pilot stage valve seat 123. The pilot stage spool 122 may be axially movable in the second chamber C 2.
Specifically, the pilot stage spool 122 is movably disposed coaxially within the second chamber C 2. The pilot stage spool 122 includes a boss portion 122a located in the middle region, a lead portion 122b located in the radial periphery, and a connection portion 122c connecting the boss portion 122a and the lead portion 122b, the connection portion 122c being provided with a plurality of pilot stage spool through holes K in the axial direction. The lead portion 122b is provided with a step at one side axially adjacent to the pilot oil hole 125, the boss 122a is inserted into the inner ring of the pilot stage spring 121, one end of the pilot stage spring 121 abuts against a side wall of the second chamber C 2 of the valve housing 15 at one side adjacent to the pilot oil hole 125, and the other end of the pilot stage spring 121 presses the step of the lead portion 122 b. The radial peripheral outer wall of the lead portion 122b is in sliding sealing engagement with the radial peripheral inner wall of the second chamber C 2 in the valve housing 15. The side of the boss 122a near the pilot oil hole 125 is a boss end surface f 4 perpendicular to the axial direction, and the projection of the boss end surface f 4 on the side wall of the side of the second chamber C 2 near the pilot oil hole 125 covers the pilot oil hole 125, and the boss end surface f 4 can realize end surface sealing with the pilot oil hole 125.
The pilot stage valve seat 123 is fixedly disposed coaxially at an end of the valve sleeve 15 remote from the main valve seat 117. Illustratively, the side of the valve sleeve 15 remote from the main valve seat 117 forms a step, at which the pilot stage valve seat 123 is fixedly arranged coaxially with the valve sleeve 15, the circumferential surface of the pilot stage valve seat 123 being sealed with the valve sleeve 15. The pilot valve seat 123 has pilot valve seat through holes L extending in the axial direction in the central region.
The relief valve 13 includes a relief valve spool 132, a relief valve spring 131, and a relief valve spring seat 134. The valve sleeve 15 is arranged in the housing 17 on the side facing away from the main valve seat 117, and a receiving space C 3 is arranged in the housing 17 in the axial direction. The end of the housing 17, which is far away from the valve housing 15, is fixedly provided with a relief valve spring seat 134, the relief valve core 132 and the relief valve spring 131 are arranged in a relief valve cavity formed by the housing 17, the pilot stage valve seat 123 and the relief valve spring seat 134, and the accommodation cavity C 3 is contained in the relief valve cavity. The relief valve spool 132 is axially movable within the relief valve chamber. The side of the housing 17 remote from the valve sleeve 15 is enclosed in an electromagnetic head housing 142, in which electromagnetic head housing 142 the electromagnetic head 14 is also arranged. A pushrod 141 extending from the intermediate region of the electromagnetic head 14 penetrates the relief valve spring seat 134 and the relief valve spool 132 to contact the pilot stage spool 122. A gap is formed between the pilot-stage valve seat through hole L and the push rod 141, so that the push rod 141 can smoothly pass through the pilot-stage valve seat through hole L to move along the axial direction.
The safety valve core 132 is coaxially and movably arranged in the safety valve cavity, and the safety valve core 132 is similar to a barrel shape and comprises a barrel part 132a and an extension part 132b connected with the barrel part 132 a. The barrel opening faces the relief valve spring seat 134, a through hole is formed in the barrel bottom and is used for penetrating the push rod 141, and the push rod 141 is in sliding sealing fit with the through hole in the barrel bottom, namely the relief valve core 132 is in sliding sealing fit with the push rod 141. The bottom of the barrel 132a extends to form an extension 132b along the axial direction, one side of the extension 132b, which is close to the pilot valve seat 123, is an extension end surface f 3 perpendicular to the axial direction, and the projection of the extension end surface f 3 on the pilot valve seat 123 covers the pilot valve seat through hole L. The outer extension end surface f 3 can realize end surface sealing with the pilot stage valve seat through hole L.
The outer radial peripheral wall of the barrel portion 132a of the relief valve core 132 is in contact with the inner radial peripheral wall of the accommodation chamber C 3 of the housing 17 to achieve smooth axial movement of the relief valve core 132. Specifically, a groove V may be axially disposed on an inner wall of the accommodating cavity C 3 of the housing 17, so as to prevent the oil cavity of the side of the safety valve core 132 away from the pilot valve seat 123 from being blocked, and ensure that the safety valve core 132 moves smoothly in the axial direction.
The push rod 141 passes through the inner ring of the relief valve spring 131, and the relief valve spring 131 is axially pressed between the relief valve element 132 and the relief valve spring seat 134. Specifically, one end of the relief valve spring 131 abuts against the bottom of the cylindrical portion 132a, and the other end of the relief valve spring 131 abuts against the relief valve spring seat 134. Under the action of the pretightening force of the safety valve spring 131, the end surface f 3 of the outer extension part of the safety valve core 132 is sealed with the end surface of the through hole L of the pilot stage valve seat, namely the safety valve port 133 is closed.
The damping control solenoid valve 10 of the embodiment of the present invention mainly operates under two working conditions: one is a normal power-on condition, and the other is a power-off failure condition.
Under the normal power-on working condition, the electromagnetic head 14 is excited by current to generate electromagnetic force, the electromagnetic force drives the push rod 141 to act on the pilot-stage valve core 122, the elastic force of the pilot-stage spring 121 is overcome, the boss end surface f 4 of the pilot-stage valve core 122 contacts with the side wall surface of the side, close to the pilot oil hole 125, of the second chamber C 2 on the valve sleeve 15, namely, the boss end surface f 4 of the pilot-stage valve core 122 covers the pilot oil hole 125, and the pilot valve port 126 is in a closed state. The main stage spool 112 contacts the main valve seat 117 under the preload of the main stage spring 114, and the main valve port 116 is also closed. When the main oil pressure (oil pressure in the main valve chamber 111) increases, the pressure is transmitted to the pilot stage spool 122 through the main valve chamber 111, the damping hole 113, the pilot chamber 124, and the pilot oil hole 125. As the oil that enters the main valve chamber 111 increases, the oil pressure that is transferred to the pilot stage spool 122 increases. Until the resultant force of the oil pressure transferred to the pilot stage spool 122 and the elastic force of the pilot stage spring 121 is greater than the electromagnetic force, the pilot stage spool 122 is pushed away, and the pilot valve port 126 starts to flow; at this time, the main valve chamber 111 and the pilot chamber 124 on both sides of the main stage spool 112 generate a pressure difference due to the damping hole 113. As the pilot port 126 increases in flow, the differential pressure across the main stage spool 112 increases, gradually pushing the main stage spool 112 open and oil overflows from the main valve chamber 111 through the main port 116 to the oil outlet 16. From the force applied by the pilot stage spool 122, the pressure in the pilot chamber 124 is determined by the electromagnetic force and remains substantially unchanged during the overflow process. From the stress of the main stage spool 112, the pressure of the main valve chamber 111 is determined by the pressure of the pilot chamber 124 and the elastic force of the main stage spring 114. Therefore, by continuously changing the current to change the electromagnetic force, the control pressure of the main valve chamber 111 can be changed, and the damping force of the shock absorber can be continuously adjusted.
Under the working condition of power failure, the electromagnetic force to the push rod 141 is lost by the electromagnetic head 14, the push rod 141 does not generate thrust to the pilot-stage valve core 122 any more, the pilot-stage valve core 122 is pushed away under the pretightening force of the pilot-stage spring 121, and the pilot valve port 126 is in a completely opened state; at this time, the pilot stage spool 122 contacts with the first f 1 end face of the pilot valve seat, and the specific lead portion 122b contacts with the first f 1 end face of the pilot valve seat to realize end face sealing of the contact part of the two; at this time, the oil pressure in the main valve chamber 111 is transmitted to the relief valve element 132, specifically to the outer end surface f 3 of the relief valve element 132, through the damping hole 113, the pilot chamber 124, the pilot oil hole 125, the pilot valve element through hole K, and the pilot valve seat through hole L. The relief valve element 132 is in contact with the pilot valve seat end surface two f 2 under the action of the relief valve spring 131. The opening pressure of the relief valve element 132 is determined by the elastic force of the relief valve spring 131. When the main oil pressure rises to the opening pressure of the relief valve element 132, the oil pressure pushes the outer end face f 3 of the relief valve element 132 away, and the relief valve element 132 moves axially toward the side (rightward) of the electromagnetic head 14. The oil enters the relief valve cavity space released by the rightward movement of the relief valve core 132, i.e., the oil overflows (depressurizes) through the relief valve port 133. The pressure difference is also generated at the two ends of the main valve core, and the main valve core is opened along with the increase of the overflow quantity. The pressure regulation effect is the same as the normal power-on condition. The relief valve spring seat 134 is in an interference fit with the housing 17, and the relief valve spring seat 134 can be used as a spring force adjustment element in actual production to achieve better performance consistency.
The damping control solenoid valve 10 of the embodiment of the present invention has a stable fail-safe mode, and the safety valve 13 is the same type as the main stage valve 11 and the pilot stage valve 12, and is a face seal seat valve. Compared with a spherical one-way valve, the sealing performance of the valve is greatly improved, the machining precision is not as high as that of a ball valve, and the valve has good economy. Compared with the safety mode of gap throttling, the safety valve working pressure of the embodiment of the invention is determined by the safety valve spring 131, has low sensitivity to the performance of the electromagnetic valve under the failure safety working condition, and has good stability. In addition, the relief valve spring seat 134 can be used as a production adjusting element, and the pretightening force of the relief valve spring 131 can be adjusted in real time during production, so that the consistency of failure safety performance of each product is ensured.
The damping control solenoid valve 10 according to the first embodiment of the present invention can be applied to a shock absorber 20, and specifically as shown in fig. 7, the shock absorber 20 is used as follows:
The damping control solenoid valve 10 is disposed outside the shock absorber 20, an inlet (i.e., a main valve chamber 111) of the damping control solenoid valve 10 communicates with an intermediate chamber 24 of the shock absorber, and an outlet (i.e., an oil outlet 16) of the damping control solenoid valve 10 communicates with a compensation chamber 25 of the shock absorber 20. Intermediate chamber 24 of shock absorber 20 communicates with upper chamber 22.
When the piston 21 of the shock absorber 20 moves upwards (restoring stroke), the oil in the upper cavity 22 is compressed, enters the middle cavity 24, flows further towards the damping control electromagnetic valve 10, the main valve cavity 111 is filled with oil, the damping control electromagnetic valve 10 controls the opening and closing of an oil way, finally overflows from the oil outlet 16 to enter the compensation cavity 25, and the oil in the compensation cavity 25 enters the lower cavity 23 through the compensation valve 26, so that the oil in the lower cavity 23 is compensated. By controlling the damping of the damping control solenoid valve 10, the pressure of the oil in the upper chamber 22 can be controlled, thereby controlling the damping force of the restoring stroke of the shock absorber 20.
When the piston 21 of the shock absorber 20 moves downward (compression stroke), oil in the lower chamber 23 is compressed, the oil enters the upper chamber 22 through the flow valve 27, the excessive oil enters the main valve chamber 111 of the damping control electromagnetic valve 10 through the middle chamber 24, the damping control electromagnetic valve 10 controls the opening and closing of an oil path, and finally oil overflows from the oil outlet 16 and enters the compensation chamber 25. By controlling the damping of the damping control solenoid valve 10, the pressure of the oil in the upper chamber 22 can be controlled, thereby controlling the damping force of the compression stroke.
In use, the piston 21 reciprocates within the cylinder during pressure and relief to provide shock absorption. The damping control solenoid valve 10 is connected to a central control unit (ECU) system of the vehicle through a wire harness, and the opening and closing size of the damping control solenoid valve 10 is controlled by the ECU system of the vehicle, thereby adjusting the damping effect of the shock absorber 20. Specifically, during operation, the running state of the vehicle is determined according to the data of the vehicle body acceleration sensor, the wheel acceleration sensor, the lateral acceleration sensor and other sensors on the vehicle, the ECU performs operation, and then the ECU sends a corresponding instruction to the damping control electromagnetic valve 10 on the shock absorber, and controls the opening degree (switch size) of the damping control electromagnetic valve 10 to provide damping suitable for the current state, or a preset mode can be selected by the driver in the vehicle.
The damping control solenoid valve of the second embodiment of the present invention includes:
the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod;
the safety valve comprises a safety valve sleeve, a safety valve core, a safety valve spring and a safety valve seat; the safety valve spring is extruded between the safety valve sleeve and the safety valve core;
During normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve;
When the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve; the oil in the pilot stage valve is increased to a preset degree, sequentially passes through the clearance between the safety valve sleeve and the push rod and the clearance between the safety valve core and the push rod, and enters an adjusting cavity formed by the safety valve core and a safety valve spring seat, and the oil pressure in the adjusting cavity acts on the outer end face of the safety valve core to enable the safety valve core to move to one side of the pilot stage valve, so that the pressure in the pilot stage valve and the main stage valve is adjusted.
A damping control solenoid valve according to a second embodiment of the present invention will be described in detail with reference to fig. 8 to 9.
As shown in fig. 8 and 9, the damping control solenoid valve 30 includes a main stage valve 11, a pilot stage valve 12, a relief valve 33, and an electromagnetic head 14. Specifically, the damping control solenoid valve 30 includes a valve housing 35, in which a first chamber D 1, a pilot oil hole 125, and a second chamber D 2 are sequentially formed in the valve housing 35 in the axial direction. Illustratively, the bore diameter of pilot oil bore 125 is smaller than the radial dimension of chamber one D 1, and the bore diameter of pilot oil bore 125 is also smaller than the radial dimension of chamber two D 2. The main stage valve 11 includes a main valve seat 117, a main stage spool 112, and a main stage spring 114. The main valve seat 117 of the main stage valve 11 is disposed at one end of the valve sleeve 35 and the main stage spool 112 is disposed within a chamber D 1 defined by the valve sleeve 35 and the main valve seat 117. The main stage spool 112 may move axially in a chamber D 1. The pilot stage spool 122 and pilot stage spring 121 are disposed within a chamber two D 2 in the valve sleeve 35. The pilot stage spool 122 may move axially in chamber two D 2.
The main stage valve 11, the pilot oil hole 125, and the pilot stage spool 122 in the second embodiment have the same structure as those in the first embodiment, and will not be described again, focusing on the differences between the second embodiment and the first embodiment.
The valve sleeve 35 is disposed in the housing 37 on a side thereof remote from the main valve seat 117, and a chamber three D 3 is axially disposed in the housing 37. A safety valve seat 334 is fixedly provided in the end of the housing 37 remote from the valve sleeve 35. Illustratively, the valve sleeve 35 is coaxial with the housing 37, the radial diameter of chamber two D 2 in the valve sleeve 35 is the same as the radial diameter of chamber three D 3 in the housing 37, and chamber two D 2 is the same radial size and communicates with chamber three D 3. The safety valve sleeve 331 is fixedly disposed in the second chamber D 2 and the third chamber D 3 coaxially, and the safety valve sleeve 331 is press-fit in the valve sleeve 35 and the housing 37.
The safety valve sleeve 331 is similar to a barrel shape, the barrel mouth of the safety valve sleeve 331 faces the safety valve seat 334, the barrel bottom of the safety valve sleeve 331 is provided with a safety valve sleeve through hole 331a for penetrating the push rod 141, a gap is arranged between the push rod 141 and the safety valve sleeve through hole 331a, and oil can axially pass through the gap.
The relief valve core 332 is coaxially movably disposed in the relief valve sleeve 331, and a side of the relief valve core 332 away from the pilot stage valve core 122 is in sealing connection with the relief valve seat 334 to form a cavity. Specifically, the safety valve core 332 is similar to a barrel, the barrel opening of the safety valve core 332 faces the barrel bottom of the safety valve sleeve 331, the barrel outer wall of the safety valve core 332 is sleeved on the barrel inner wall of the safety valve sleeve 331, and the barrel outer wall of the safety valve core 332 is in sliding sealing fit with the barrel inner wall of the safety valve sleeve 331. The bottom of the barrel of the relief valve core 332 is provided with a relief valve core through hole 332a for passing through the push rod 141, and a gap is provided between the push rod 141 and the relief valve core through hole 332a, through which oil can pass in the axial direction. The barrel bottom of the relief valve core 332 extends axially to a side away from the barrel opening to form an extension portion 332b, the extension portion 332b is in sealing connection with the relief valve seat 334, the extension portion 332b is, for example, a radially circumferentially distributed thin-walled annular shape, and an adjustment chamber D 4 is formed by an outer end surface of the barrel bottom of the relief valve core 332 (an outer end surface f 5 of the relief valve core), the extension portion 332b, and the relief valve seat 334. The relief valve spring 333 is coaxially disposed, and one end of the relief valve spring 333 abuts against the bottom of the barrel of the relief valve sleeve 331, and the other end of the relief valve spring 333 abuts against the bottom of the barrel of the relief valve spool 332.
The side of the housing 37 remote from the valve sleeve 35 is enclosed in an electromagnetic head housing 142, the electromagnetic head housing 142 also being provided with an electromagnetic head 14. A pushrod 141 extending from the middle region of the solenoid head 14 passes through the relief valve seat 334, relief valve spool 332, relief valve spring 333, relief valve sleeve 331 and contacts the pilot stage spool 122.
The damping control solenoid valve 30 of the second embodiment of the present invention mainly operates under two conditions: one is a normal power-on condition, and the other is a power-off failure condition.
Under the normal power-on working condition, the electromagnetic head 14 is excited by current to generate electromagnetic force, the electromagnetic force acts on the pilot stage valve core 122 by the push rod 141, and overcomes the elastic force of the pilot stage spring 121 to enable the protruding portion end face of the pilot stage valve core 122 to contact with the side wall face of the second chamber D 2 on the valve sleeve 35, which is close to one side of the pilot oil hole 125, namely, the protruding portion end face of the pilot stage valve core 122 covers the pilot oil hole 125, and the pilot valve port is in a closed state. The main stage spool 112 contacts the main valve seat 117 under the preload of the main stage spring 114, and the main valve port 116 is also closed. When the main oil pressure (oil pressure in the main valve chamber 111) increases, the pressure is transmitted to the pilot stage spool 122 through the main valve chamber 111, the damping hole 113, the pilot chamber 124, and the pilot oil hole 125. As the oil that enters the main valve chamber 111 increases, the oil pressure that is transferred to the pilot stage spool 122 increases. Until the resultant force of the oil pressure transferred to the pilot stage spool 122 and the elastic force of the pilot stage spring 121 is greater than the electromagnetic force acting on the push rod 141, the pilot stage spool 122 is pushed away, and the pilot valve port 126 starts to flow through; at this time, the main valve chamber 111 and the pilot chamber 124 on both sides of the main stage spool 112 generate a pressure difference due to the damping hole 113. As the pilot port 126 increases in flow, the differential pressure across the main stage spool 112 increases, gradually pushing the main stage spool 112 open and oil overflows from the main valve chamber 111 through the main port 116 to the oil outlet 16. As can be seen from the force applied to the pilot stage spool 122, the pressure in the pilot chamber 124 is determined by electromagnetic force. From the stress of the main stage spool 112, the pressure of the main valve chamber 111 is determined by the pressure of the pilot chamber 124 and the elastic force of the main stage spring 114. Therefore, by continuously changing the current to change the electromagnetic force, the control pressure of the main valve chamber 111 can be changed, and the damping force of the shock absorber can be continuously adjusted.
Under the power failure working condition, the electromagnetic force to the push rod 141 is lost by the electromagnetic head 14, the push rod 141 does not generate thrust to the pilot-stage valve core 122 any more, the pilot-stage valve core 122 is pushed away under the pretightening force of the pilot-stage spring 121, the pilot valve port 126 is in a fully opened state, the pilot-stage valve 12 is in a failure state, and at the moment, the pilot-stage valve core 122 is in contact with the left end face of the safety valve sleeve 331. At this time, the oil pressure in the main valve chamber 111 is pressed to the adjustment chamber D 4 through the radial clearance between the damping hole 113, the pilot chamber 124, the pilot oil hole 125, the pilot stage spool through hole, the relief valve sleeve through hole 331a and the push rod 141, and the radial clearance between the relief valve chamber, the relief valve spool through hole 332a and the push rod 141. The oil gradually fills the adjusting cavity D 4, and as the oil pressure increases gradually, the oil pressure in the adjusting cavity D 4 acts on the outer end surface f 5 of the relief valve core, pushing the relief valve core 332 to move away from the relief valve spring seat 334 against the elastic force of the relief valve spring 333, so as to establish the oil pressure of the failure mode. The movement direction of the relief valve core 332 of the second embodiment is opposite to that of the first embodiment, and the relief valve core through hole 332a maintains a certain radial clearance with the push rod 141, reducing friction of the push rod 141.
The damping control electromagnetic valve 30 of the embodiment of the invention has a stable failure safety mode, the sealing performance of the valve is greatly improved compared with that of a spherical one-way valve, the processing precision is not as high as that of a ball valve, and the valve has good economy. Compared with the safety mode of gap throttling, the working pressure of the safety valve is determined by the safety valve spring 333, the sensitivity to the performance of the electromagnetic valve under the failure safety working condition is low, and the safety valve has good stability.
The damping control electromagnetic valve 30 of the second embodiment of the present invention may also be applied to a shock absorber, and the working process of the damping control electromagnetic valve 30 and the shock absorber is the same as the working process of the damping control electromagnetic valve 10 and the shock absorber of the first embodiment, and will not be described again.
In summary, the present invention provides a damping control electromagnetic valve, including: the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod; the safety valve comprises a safety valve core, a safety valve spring and a safety valve spring seat; the relief valve spring is compressed between the relief valve spool and the relief valve spring seat; during normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve, the oil pressure in the pilot stage valve is increased to a preset degree to push the safety valve core open for pressure relief, and the elastic force of the safety valve spring adjusts the pressure in the pilot stage valve and the main stage valve. The damping control electromagnetic valve has a stable failure safety mode and good economy.
The present invention also provides another damping control solenoid valve, including: the main stage valve, the pilot stage valve, the safety valve, the electromagnetic head and the push rod; the safety valve comprises a safety valve sleeve, a safety valve core, a safety valve spring and a safety valve seat; the safety valve spring is extruded between the safety valve sleeve and the safety valve core; during normal operation, the electromagnetic head controls the push rod to apply acting force on the pilot stage valve; when the power is off, the electromagnetic head loses the capacity of driving the push rod to adjust the oil pressure in the pilot stage valve; the oil in the pilot stage valve is increased to a preset degree, sequentially passes through the clearance between the safety valve sleeve and the push rod and the clearance between the safety valve core and the push rod, and enters an adjusting cavity formed by the safety valve core and a safety valve spring seat, and the oil pressure in the adjusting cavity acts on the outer end face of the safety valve core to enable the safety valve core to move to one side of the pilot stage valve, so that the pressure in the pilot stage valve and the main stage valve is adjusted. The damping control electromagnetic valve has a stable failure safety mode and good economy.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the method disclosed in the embodiment, the description is relatively simple since it corresponds to the device disclosed in the embodiment, and the relevant points refer to the description of the method section.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the claims, and any person skilled in the art may make any possible variations and modifications to the technical solution of the present invention using the method and technical content disclosed above without departing from the spirit and scope of the invention, so any simple modification, equivalent variation and modification made to the above embodiments according to the technical matter of the present invention fall within the scope of the technical solution of the present invention.
Claims (17)
1. A damping control solenoid valve, comprising:
A main stage valve (11), a pilot stage valve (12), a safety valve (13), an electromagnetic head (14) and a push rod (141);
the pilot stage valve (12) comprises a pilot stage spring (121), a pilot stage valve core (122) and a pilot stage valve seat (123);
The relief valve (13) comprises a relief valve core (132), a relief valve spring (131) and a relief valve spring seat (134); the relief valve spring (131) is compressed between the relief valve spool (132) and the relief valve spring seat (134); the safety valve (13) is coaxially arranged with the pilot stage valve (12); the safety valve (13) and the pilot stage valve (12) are both face seal seat valves; the push rod (141) penetrates through the safety valve core (132) to be in contact with the pilot-stage valve core (122);
During normal operation, the electromagnetic head (14) controls the push rod (141) to apply a force on the push rod
The safety valve core (132) is sealed with the end face of the pilot valve seat (123) on the pilot valve (12); when the power is off, the electromagnetic head (14) loses the capacity of driving the push rod (141) to adjust the oil pressure in the pilot stage valve (12), the oil pressure in the pilot stage valve (12) is increased to a preset degree to push the safety valve core (132) away for pressure relief, and the safety valve core (132) is separated from the end face of the pilot stage valve seat (123); the elastic force of the relief valve spring (131) regulates the pressure in the pilot stage valve (12) and the main stage valve (11).
2. The damping control solenoid valve according to claim 1 wherein,
The damping control electromagnetic valve (10) comprises a shell (17), an accommodating cavity is formed in the shell (17) along the axial direction of the shell, a safety valve spring seat (134) is fixedly arranged at one end, close to the electromagnetic head (14), of the shell (17), and the safety valve core (132) is coaxially and movably arranged in a safety valve cavity formed by the pilot stage valve (12), the accommodating cavity and the safety valve spring seat (134).
3. A damping control solenoid valve as defined in claim 2 wherein,
The safety valve core (132) is similar to a barrel, and comprises a barrel part (132 a) and an extension part (132 b) connected with the barrel part (132 a), wherein the barrel bottom of the barrel part (132 a) axially and outwards extends out of the extension part (132 b), a barrel opening of the barrel part (132 a) faces the safety valve spring seat (134), through holes penetrating through the barrel bottom and the extension part (132 b) along the axial direction are formed in the barrel bottom and the extension part (132 b) and are used for penetrating through the push rod (141), and the push rod (141) is in sliding sealing fit with the through holes;
During normal operation, the extension part (132 b) is sealed with the end face of the pilot stage valve (12) under the action of the pretightening force of the safety valve spring (131);
a groove is axially arranged on the inner wall of the accommodating cavity of the shell (17).
4. The damping control solenoid valve according to claim 1 wherein,
The damping control electromagnetic valve (10) comprises a valve sleeve (15), wherein a first chamber, a pilot oil hole (125) and a second chamber which are communicated are sequentially formed in the valve sleeve (15) along the axial direction of the valve sleeve.
5. A damping control solenoid valve as defined in claim 4 wherein,
The main stage valve (11) comprises a main valve seat (117), a main stage valve core (112) and a main stage spring (114);
The main valve seat (117) is fixedly arranged at one axial end of the valve sleeve (15), the main-stage valve core (112) is coaxially and movably arranged in the first chamber, and the main-stage valve core (112) is provided with a damping hole (113) and a pilot cavity (124) which are communicated with each other along the axial direction; the pilot cavity (124) is coaxially provided with the main spring (114).
6. A damping control solenoid valve as defined in claim 4 wherein,
The pilot valve seat (123) is fixedly arranged at one end of the valve sleeve (15), and the pilot valve core (122) is coaxially and movably arranged in the second chamber formed by the valve sleeve and the pilot valve seat (123).
7. The damping control solenoid valve according to claim 6 wherein,
And pilot-stage valve seat through holes penetrating in the axial direction are distributed in the central area of the pilot-stage valve seat (123), gaps are reserved between the pilot-stage valve seat through holes and the push rod (141), and projections of the safety valve core on the pilot-stage valve seat cover the pilot-stage valve seat through holes.
8. The damping control solenoid valve according to claim 6 wherein,
The pilot-stage spool (122) comprises a protruding part (122 a) arranged along the axial direction, a lead part (122 b) arranged around the radial circumference of the protruding part (122 a) and a connecting part (122 c) for connecting the protruding part (122 a) and the lead part (122 b), wherein a plurality of pilot-stage spool through holes are arranged on the connecting part (122 c) along the axial direction; the guide part (122 b) is axially provided with a step at one side close to the guide oil hole (125), the protruding part (122 a) is inserted into the inner ring of the guide stage spring (121), one end of the guide stage spring (121) abuts against the side wall of the second chamber in the valve sleeve (15) at one side close to the guide oil hole (125), and the other end of the guide stage spring (121) is extruded at the step of the guide part (122 b).
9. The damping control solenoid valve according to claim 8 wherein,
The outer radial peripheral wall of the lead part (122 b) is in sliding sealing fit with the inner radial peripheral wall of the second chamber in the valve sleeve (15); one side of the protruding portion (122 a) close to the pilot oil hole (125) is a protruding portion end face perpendicular to the axial direction, and projection of the protruding portion end face on the side wall of one side of the second cavity close to the pilot oil hole (125) covers the pilot oil hole (125).
10. A damping control solenoid valve as defined in claim 2 wherein,
The damping control electromagnetic valve (10) comprises an electromagnetic head shell (142), wherein one side of the shell (17) in the axial direction is wrapped in the electromagnetic head shell (142), and an electromagnetic head (14) is further arranged in the electromagnetic head shell (142); the push rod (141) extending from the middle region of the electromagnetic head (14) penetrates through the relief valve spring seat (134) and the relief valve core (132) and can be in contact with the pilot stage valve core (122).
11. A damping control solenoid valve, comprising:
A main stage valve (11), a pilot stage valve (12), a safety valve (33), an electromagnetic head (14) and a push rod (141);
The safety valve (33) comprises a safety valve sleeve (331), a safety valve core (332), a safety valve spring (333) and a safety valve spring seat (334); the safety valve spring (333) is pressed between the safety valve sleeve (331) and the safety valve spool (332);
During normal operation, the electromagnetic head (14) controls the push rod (141) to apply acting force on the pilot stage valve (12);
When the power is off, the electromagnetic head (14) loses the capacity of driving the push rod (141) to adjust the oil pressure in the pilot stage valve (12); the oil in the pilot stage valve (12) is increased to a preset degree, sequentially passes through the gap between the safety valve sleeve (331) and the push rod (141) and the gap between the safety valve core (332) and the push rod (141), and enters an adjusting cavity formed by the safety valve core (332) and the safety valve spring seat (334), and the oil pressure in the adjusting cavity acts on the outer end face of the safety valve core, so that the safety valve core (332) moves towards one side of the pilot stage valve (12), and the pressures in the pilot stage valve (12) and the main stage valve (11) are adjusted.
12. The damping control solenoid valve according to claim 11 wherein,
The safety valve sleeve (331) is similar to a barrel, a barrel opening of the safety valve sleeve (331) faces the safety valve spring seat (334), a safety valve sleeve through hole (331 a) is formed in the barrel bottom of the safety valve sleeve (331) and is used for penetrating the push rod (141), and a gap is formed between the push rod (141) and the safety valve sleeve through hole (331 a);
The safety valve core (332) is coaxially and movably arranged in the safety valve sleeve (331), the safety valve core (332) is similar to a barrel, a barrel opening of the safety valve core (332) faces to the barrel bottom of the safety valve sleeve (331), and the barrel outer wall of the safety valve core (332) is in sliding sealing fit with the barrel inner wall of the safety valve sleeve (331); the barrel bottom of the safety valve core (332) is provided with a safety valve core through hole (332 a) for penetrating through the push rod (141), and a gap is arranged between the push rod (141) and the safety valve core through hole (332 a).
13. The damping control solenoid valve according to claim 12 wherein,
The barrel bottom of the safety valve core (332) extends to one side far away from the barrel opening along the axial direction to form an extension part (332 b), and the outer side end surface of the barrel bottom of the safety valve core (332), the extension part (332 b) and the safety valve spring seat (334) enclose the adjusting cavity.
14. The damping control solenoid valve according to claim 12, characterized in that the relief valve spring (333) is disposed coaxially with the relief valve spool (332), one end of the relief valve spring (333) abuts against the tub bottom of the relief valve sleeve (331), and the other end of the relief valve spring (333) abuts against the tub bottom of the relief valve spool (332).
15. The damping control solenoid valve according to claim 12 wherein,
The damping control electromagnetic valve (30) comprises a valve sleeve (35), a first chamber, a pilot oil hole (125) and a second chamber which are communicated are formed in the valve sleeve (35) in sequence along the axial direction, the main stage valve is arranged in the first chamber, and the pilot stage valve is arranged in the second chamber.
16. The damping control solenoid valve according to claim 15 wherein,
One side of the valve sleeve (35) far away from the main stage valve (11) is sleeved in a shell (37), a chamber III is axially arranged in the shell (37), and one end of the shell (37) far away from the valve sleeve (35) is fixedly provided with a safety valve spring seat (334);
the valve sleeve (35) and the shell (37) are coaxially arranged, and the radial dimension of the second chamber is the same as that of the third chamber; the safety valve sleeve (331) is fixedly arranged in the communicated second chamber and the communicated third chamber in the coaxial direction.
17. The damping control solenoid valve according to claim 15 wherein,
The main stage valve (11) comprises a main valve seat (117), a main stage valve core (112) and a main stage spring (114);
The main valve seat (117) is fixedly arranged at one axial end of the valve sleeve (35), the main-stage valve core (112) is coaxially and movably arranged in the first chamber, and the main-stage valve core (112) is provided with a damping hole (113) and a pilot cavity (124) which are communicated with each other along the axial direction; the pilot cavity (124) is coaxially provided with the main spring (114).
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| CN202210672845.XA CN115217882B (en) | 2022-06-14 | 2022-06-14 | Damping control electromagnetic valve |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5850896A (en) * | 1994-10-21 | 1998-12-22 | Yamaha Hatsudoki Kabushiki Kaisha | Shock absorber |
| JP2005155718A (en) * | 2003-11-21 | 2005-06-16 | Toyooki Kogyo Co Ltd | Hydraulic damper for damping |
| EP2243979A2 (en) * | 2009-04-23 | 2010-10-27 | ZF Friedrichshafen AG | Adjustable vibration absorber with an emergency valve |
| CN103282220A (en) * | 2011-01-31 | 2013-09-04 | 日立汽车系统株式会社 | Suspension controller |
| JP2015028353A (en) * | 2013-07-30 | 2015-02-12 | 日立オートモティブシステムズ株式会社 | Attenuation force adjustment type shock absorber |
| CN105473887A (en) * | 2013-08-09 | 2016-04-06 | 日立汽车系统株式会社 | Damping force adjustable shock absorber |
| WO2018097148A1 (en) * | 2016-11-25 | 2018-05-31 | 日立オートモティブシステムズ株式会社 | Shock absorber and shock absorber manufacturing method |
| CN109416102A (en) * | 2016-06-24 | 2019-03-01 | 日立汽车系统株式会社 | Damping force adjustment type buffer |
| CN110360261A (en) * | 2019-08-06 | 2019-10-22 | 绵阳富临精工机械股份有限公司 | A kind of solenoid valve adjusting damper damping |
| CN211737851U (en) * | 2020-01-20 | 2020-10-23 | 富奥汽车零部件股份有限公司 | Electric control shock absorber |
| CN112815033A (en) * | 2021-01-25 | 2021-05-18 | 绵阳富临精工股份有限公司 | Electromagnetic valve for adjusting damping of shock absorber |
| DE102020202384A1 (en) * | 2020-02-25 | 2021-08-26 | Zf Friedrichshafen Ag | Adjustable vibration damper |
| CN214578532U (en) * | 2021-01-25 | 2021-11-02 | 绵阳富临精工股份有限公司 | Pilot valve for continuous damping adjustable electromagnetic valve |
| WO2022068046A1 (en) * | 2020-09-30 | 2022-04-07 | 潍柴动力股份有限公司 | Pilot-operated electric proportional high-pressure relief valve |
-
2022
- 2022-06-14 CN CN202210672845.XA patent/CN115217882B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5850896A (en) * | 1994-10-21 | 1998-12-22 | Yamaha Hatsudoki Kabushiki Kaisha | Shock absorber |
| JP2005155718A (en) * | 2003-11-21 | 2005-06-16 | Toyooki Kogyo Co Ltd | Hydraulic damper for damping |
| EP2243979A2 (en) * | 2009-04-23 | 2010-10-27 | ZF Friedrichshafen AG | Adjustable vibration absorber with an emergency valve |
| CN103282220A (en) * | 2011-01-31 | 2013-09-04 | 日立汽车系统株式会社 | Suspension controller |
| JP2015028353A (en) * | 2013-07-30 | 2015-02-12 | 日立オートモティブシステムズ株式会社 | Attenuation force adjustment type shock absorber |
| CN105473887A (en) * | 2013-08-09 | 2016-04-06 | 日立汽车系统株式会社 | Damping force adjustable shock absorber |
| CN109416102A (en) * | 2016-06-24 | 2019-03-01 | 日立汽车系统株式会社 | Damping force adjustment type buffer |
| WO2018097148A1 (en) * | 2016-11-25 | 2018-05-31 | 日立オートモティブシステムズ株式会社 | Shock absorber and shock absorber manufacturing method |
| CN110360261A (en) * | 2019-08-06 | 2019-10-22 | 绵阳富临精工机械股份有限公司 | A kind of solenoid valve adjusting damper damping |
| CN211737851U (en) * | 2020-01-20 | 2020-10-23 | 富奥汽车零部件股份有限公司 | Electric control shock absorber |
| DE102020202384A1 (en) * | 2020-02-25 | 2021-08-26 | Zf Friedrichshafen Ag | Adjustable vibration damper |
| WO2022068046A1 (en) * | 2020-09-30 | 2022-04-07 | 潍柴动力股份有限公司 | Pilot-operated electric proportional high-pressure relief valve |
| CN112815033A (en) * | 2021-01-25 | 2021-05-18 | 绵阳富临精工股份有限公司 | Electromagnetic valve for adjusting damping of shock absorber |
| CN214578532U (en) * | 2021-01-25 | 2021-11-02 | 绵阳富临精工股份有限公司 | Pilot valve for continuous damping adjustable electromagnetic valve |
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| CN115217882A (en) | 2022-10-21 |
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