CN218895042U - Electromagnetic valve - Google Patents
Electromagnetic valve Download PDFInfo
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- CN218895042U CN218895042U CN202223424277.6U CN202223424277U CN218895042U CN 218895042 U CN218895042 U CN 218895042U CN 202223424277 U CN202223424277 U CN 202223424277U CN 218895042 U CN218895042 U CN 218895042U
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- armature shaft
- hole structure
- pilot
- pilot valve
- valve core
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- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses an electromagnetic valve, which comprises a pilot valve, wherein the pilot valve comprises a pilot cavity and a pilot valve core, the pilot valve core is in propping contact with an armature shaft, a first through hole structure is arranged in the pilot valve core, a second through hole structure is arranged in the armature shaft, the first through hole structure is communicated with the second through hole structure, and the conduction between the pilot cavity and an armature rear cavity at the tail end of the armature shaft is completed through the first through hole structure and the second through hole structure. Through the structural arrangement of the pilot valve core and the armature shaft in the electromagnetic valve, oil pressure is established at the right end of the armature shaft, and a pressure bearing surface is established at the right ends of the pilot valve core and the armature shaft, so that the pilot valve core is easier to balance, and the problem that the electromagnetic force of the traditional electromagnetic valve is smaller and the high pressure of the main cavity cannot be directly balanced is solved.
Description
Technical Field
The utility model belongs to the technical field of high-pressure solenoid valves, and particularly relates to an auxiliary pressure balance structure for a high-pressure solenoid valve.
Background
The working principle of the electromagnetic valve is as follows: increasing current, and pushing the inner valve core to move towards the direction close to the inner valve sleeve by the driving mechanism, wherein the through flow section formed between the step of the inner valve core and the uniformly distributed oil outlet holes of the inner valve sleeve is reduced, namely the through flow section of the pilot valve is reduced; meanwhile, the pressure between the cavity formed between the main valve core and the inner valve sleeve is increased, the pressure at the rear end of the main valve core is increased, the main valve core moves towards the direction close to the upper cover, the section of the main through flow formed by the main valve core and the upper cover is reduced, when the flow is unchanged, the pressure is increased, the shock absorber is hardened, and vice versa.
As shown in fig. 1, for structural reasons, the electromagnetic force of the conventional solenoid valve is generally small, and the high pressure of the main chamber cannot be directly balanced, so that a pilot valve is generally designed on the high pressure solenoid valve to realize pressure control. In the prior pilot valve structure, the pilot cavity 10 is mainly regulated by opening and closing the pilot valve core 20, so that the pressure is regulated, and the pilot valve core 20 is balanced under the combined action of the hydraulic pressure on the left side and the right side and the electromagnetic force transmitted by the armature shaft 30.
The existing structure is limited in that the electromagnetic force acted on the armature shaft after the coil is electrified, the right end force of the pilot valve core 20 is smaller, and the larger hydraulic force on the left side is difficult to balance, so that the pilot valve 20 core is easy to be subjected to the action of the hydraulic force, the left hydraulic force is larger than the right electromagnetic force, the pilot valve core 20 moves right, the gap of the pilot cavity 10 is increased, and the hydraulic force is released, so that the pressure adjustment interval is smaller.
Disclosure of Invention
The utility model aims at: in order to overcome the problems in the prior art, the electromagnetic valve is disclosed, oil pressure is established at the right end of an armature shaft through the structural arrangement of a pilot valve core and the armature shaft in the electromagnetic valve, and a pressure bearing surface is established at the right ends of the pilot valve core and the armature shaft, so that the pilot valve core is easier to balance, and the problem that the electromagnetic force of the traditional electromagnetic valve is smaller and the high pressure of a main cavity cannot be directly balanced is solved.
The aim of the utility model is achieved by the following technical scheme:
the electromagnetic valve comprises a pilot valve body, wherein the pilot valve body comprises a pilot cavity and a pilot valve core, the pilot valve core is in propping contact with an armature shaft, a first through hole structure is arranged in the pilot valve core, a second through hole structure is arranged in the armature shaft, the first through hole structure is communicated with the second through hole structure, and the conduction of the pilot cavity and an armature rear cavity at the tail end of the armature shaft is completed through the first through hole structure and the second through hole structure.
According to a preferred embodiment, the first through-hole structure is arranged along the axis of the pilot spool.
According to a preferred embodiment, the cross section of the first via structure is a regular or irregular hole body structure.
According to a preferred embodiment, the second through-hole structure is arranged along the axis of the armature shaft.
According to a preferred embodiment, the cross section of the second via structure is a regular or irregular hole body structure.
According to a preferred embodiment, the armature shaft is driven based on a magnetic force generated by energizing a solenoid which is disposed circumferentially of the armature shaft and whose axis is disposed coincident with the axis of the armature shaft.
The foregoing inventive concepts and various further alternatives thereof may be freely combined to form multiple concepts, all of which are contemplated and claimed herein. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The utility model has the beneficial effects that:
according to the electromagnetic valve, through the ingenious arrangement of the circulating holes in the center positions of the pilot valve core and the armature shaft, oil flowing in from the pilot cavity can flow into the right end of the armature shaft through the first through hole structure of the pilot valve core and the second through hole structure of the armature shaft, so that oil pressure is built at the right end of the armature shaft, the armature shaft is attached to the pilot valve core through the hydraulic pressure acting on the right end face of the armature shaft, the force at the right end of the armature shaft is transmitted to the right end of the pilot valve core, the supporting force of the hydraulic pressure at the left end of the pilot valve core is assisted, the pilot valve core can be balanced more easily, and the problems that the electromagnetic force of a traditional electromagnetic valve is small and the high pressure of the main cavity cannot be balanced directly are solved.
Through the structural arrangement of the pilot valve core and the armature shaft, under the condition that the oil pressure of the pilot cavity suddenly increases, the hydraulic pressure balanced by the auxiliary pilot valve core can be increased at the right ends of the pilot valve core and the armature shaft, the instantaneous displacement of the armature shaft is prevented, and the control stability is facilitated.
When the armature shaft moves backwards, the volume of the back cavity of the armature shaft is reduced, if no conduction of the armature shaft exists, the back cavity of the armature shaft can build larger back pressure to block the backward movement of the armature shaft, and the structure improvement of the utility model can lead the oil in the back cavity of the armature shaft 3 to be conducted to the pilot cavity through the armature shaft and the hole body in the pilot valve core, so that the problem of blocked movement of the armature shaft caused by overlarge back pressure is avoided.
Meanwhile, the pilot valve core and the armature shaft are provided with holes, so that the weight of the pilot valve core and the armature shaft is reduced, and the response speed of the system is improved.
Drawings
Fig. 1 is a schematic structural view of a conventional solenoid valve;
FIG. 2 is a schematic structural view of the solenoid valve of the present utility model;
FIG. 3 is a graph of the performance of a conventional solenoid valve;
FIG. 4 is a graph of the performance of the solenoid valve of the present utility model;
the device comprises a 10-pilot cavity, a 20-pilot valve core, a 30-armature shaft, a 1-pilot valve core, a 2-first through hole structure, a 3-armature shaft, a 4-second through hole structure, a 5-armature rear cavity and a 6-pilot cavity.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, in the present utility model, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present utility model can be known by those skilled in the art without any creative effort.
Example 1:
referring to fig. 1, there is shown a solenoid valve including a pilot chamber 6 and a pilot spool 1, the pilot spool 1 being in contact with an armature shaft 3, driving of the pilot spool 1 being accomplished via the armature shaft 3.
Preferably, a first through hole structure 2 is arranged in the pilot valve core 1, a second through hole structure 4 is arranged in the armature shaft 3, the first through hole structure 2 is communicated with the second through hole structure 4, and the conduction between the pilot cavity 6 and the armature rear cavity 5 at the tail end of the armature shaft 3 is completed through the first through hole structure 2 and the second through hole structure 4.
Preferably, the first through hole structure is provided along the axis of the pilot spool 1. Further, the cross section of the first through hole structure is a regular or irregular hole body structure.
Preferably, the second through-hole structure is arranged along the axis of the armature shaft 3. Further, the section of the second through hole structure is a regular or irregular hole body structure.
Preferably, the armature shaft 3 is driven based on magnetic force generated by energizing a solenoid which is disposed in a circumferential direction of the armature shaft 3 and whose axis is disposed coincident with an axis of the armature shaft 3.
According to the electromagnetic valve, through the ingenious arrangement of the through holes in the center positions of the pilot valve core 1 and the armature shaft 3, oil flowing in from the pilot cavity 6 can flow into the right end of the armature shaft 3 through the first through hole structure 2 of the pilot valve core 1 and the second through hole structure 4 of the armature shaft 3 in sequence, so that oil pressure is built at the right end of the armature shaft 3, the armature shaft 3 is attached to the pilot valve core 1 through hydraulic force acting on the right end face of the armature shaft 3 through the oil pressure, the force at the right end of the armature shaft 3 is transferred to the right end of the pilot valve core 1, the supporting force of the hydraulic force at the left end of the pilot valve core 1 is assisted, the pilot valve core can be balanced more easily, and the problems that the electromagnetic force of a traditional electromagnetic valve is small and the high pressure of the main cavity cannot be balanced directly are solved.
In the electromagnetic valve, oil is conducted to the right ends of the pilot valve core 1 and the armature shaft 3, a pressure bearing surface can be established at the right ends of the pilot valve core 1 and the armature shaft 3, the electromagnetic force is assisted to balance, the force on the right side of the pilot valve core is increased, and the valve opening point pressure of the pilot cavity is increased. When applied to the solenoid valve, the pressure regulating section in the prior art is shown in fig. 3, the abscissa and the ordinate in fig. 3 are the flow and the pressure respectively, the highest curve is the high current, the lowest curve is the low current, and the pressure range is 3-11.5 MPa and the pressure section is 8.5MPa when the flow is high (40L/min for example).
After the structure improvement of the utility model is carried out, the performance curve of the electromagnetic valve under the same condition is shown in figure 4, the abscissa of the pressure curve is the flow Q (L/min), and the ordinate is the pressure P (MPa); the pressure curve is a performance test curve of the electromagnetic valve, and in the performance test process, under a certain inlet flow Q, electromagnetic force and hydraulic pressure in the electromagnetic valve are balanced, so that the interior reaches a stable opening degree, stable damping can be generated in the electromagnetic valve by oil liquid, and pressure difference P is generated between an inlet and an outlet of the electromagnetic valve; as the flow increases during the test, the corresponding pressure drop increases, thereby drawing the flow-pressure curve; the curve shows that the electromagnetic valve generates the intensity of damping adjustment under a certain inlet flow.
The pressure interval is the difference of the differential pressure at high current minus the differential pressure at low current under the same flow; i.e. the high current differential pressure of 17.5MPa in fig. 4, minus the low current differential pressure of 3.2MPa, gives a pressure interval of 17.5-3.2=14.3 MPa. Generally, the larger the pressure interval is, the stronger the damping adjusting capability of the product is in a certain current range, and the wider the product is in use. Therefore, the technology can greatly increase the product advantage.
Through the structural arrangement of the pilot valve core 1 and the armature shaft 3, under the condition that the oil pressure of the pilot cavity 6 suddenly increases, the hydraulic pressure balanced by the auxiliary pilot valve core 1 can be increased at the right ends of the pilot valve core 1 and the armature shaft 3, the instantaneous and sequential displacement of the armature shaft 3 is prevented, and the control stability is facilitated.
When the armature shaft 3 moves backwards, the volume of the armature rear cavity 5 is reduced, if no conduction of the armature shaft 3 exists, the armature rear cavity 5 can build larger back pressure to block the backward movement of the armature shaft 3, and the structure improvement of the utility model can lead oil in the armature shaft 3 rear cavity to be conducted to the pilot cavity 6 through the armature shaft 3 and the hole body in the pilot valve core 1, so that the problem of blocked movement of the armature shaft 3 caused by overlarge back pressure is avoided.
Meanwhile, the pilot valve core 1 and the armature shaft 3 are provided with holes, so that the weight of the pilot valve core 1 and the armature shaft 3 is reduced, and the response speed of the system is improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. An electromagnetic valve, the electromagnetic valve comprises a pilot valve, the pilot valve comprises a pilot cavity (6) and a pilot valve core (1), the pilot valve core (1) is contacted with an armature shaft (3) in a propping way, the electromagnetic valve is characterized in that,
be equipped with first through-hole structure (2) in guide's case (1), be equipped with second through-hole structure (4) in armature axle (3), first through-hole structure (2) and second through-hole structure (4) intercommunication set up to accomplish the switch-on in guide's chamber (6) and armature rear cavity (5) at armature axle (3) terminal through first through-hole structure (2) and second through-hole structure (4).
2. A solenoid valve according to claim 1, characterised in that said first through hole structure (2) is arranged along the axis of the pilot spool (1).
3. A solenoid valve according to claim 2 characterised in that the cross section of the first through hole structure (2) is a regular or irregular hole body structure.
4. A solenoid valve according to claim 1 characterised in that the second through-hole arrangement (4) is arranged along the axis of the armature shaft (3).
5. A solenoid valve according to claim 4 characterised in that the cross section of said second through hole structure (4) is a regular or irregular hole body structure.
6. A solenoid valve according to claim 4, characterised in that the armature shaft (3) is driven on the basis of a magnetic force generated by energizing a solenoid which is arranged circumferentially to the armature shaft (3) and whose axis coincides with the axis of the armature shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223424277.6U CN218895042U (en) | 2022-12-20 | 2022-12-20 | Electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223424277.6U CN218895042U (en) | 2022-12-20 | 2022-12-20 | Electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218895042U true CN218895042U (en) | 2023-04-21 |
Family
ID=86003015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223424277.6U Active CN218895042U (en) | 2022-12-20 | 2022-12-20 | Electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218895042U (en) |
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2022
- 2022-12-20 CN CN202223424277.6U patent/CN218895042U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 621000 No. 37, Fenghuang Middle Road, high end manufacturing industrial park, Mianyang City, Sichuan Province Patentee after: Fulin Precision Co.,Ltd. Country or region after: China Address before: 621000 No. 37, Fenghuang Middle Road, high end manufacturing industrial park, Mianyang City, Sichuan Province Patentee before: Mianyang Fulin Jinggong Co.,Ltd. Country or region before: China |