KR20230080648A - Gas admission valve with means for assisting disc opening force - Google Patents

Abstract

The present invention relates to a gas admission valve with a means for assisting a disc opening force, which uses an electrically driven actuator to take advantage of the advantages of the electrically driven actuator and be applied even in an ultra-high pressure environment, wherein when the pressure in the internal space is below a set pressure range, the operation of the actuator is stopped so that the disc can repeat a movement to the initial position due to a restoring force of a spring. In particular, as a means to supplement a driving force of the electric actuator, a separate pressure discharge means or a means to indirectly supplement the driving force are proposed. First, proposed is a method for releasing an internal pressure in a way of releasing the pressure to the outside air when a second pressure discharge hole is opened as a cork moves upward according to an increase of the pressure of a second chamber, or in a way of connecting an end part of a protrusion part and the upper surface of the disc so that an upward force corresponding to the area of a flange part is applied due to a pressure difference formed on the upper and lower surfaces of the flange part to compensate for a force required to open the disc. Second, the end part of the protrusion part is connected to the upper surface of the disc so that the upward force corresponding to the area of the flange part is applied by the pressure difference formed on the upper and lower surfaces of the flange part, thereby compensating for the force required to open the disc. The gas admission valve comprises a housing, a disc, an actuator, and a first elastic body.

Description

Gas admission valve with means for assisting disc opening force

The present invention relates to a gas admission valve, which regulates the pressure applied to the valve disk to assist in disc opening force capable of suppressing side effects such as noise, vibration, cavitation, and erosion that may occur according to disk ON/OFF. It relates to a guard admission valve provided with means.

All injectors of an internal combustion engine must be designed to have reproducible fuel gas emission characteristics, thereby providing predictable and reliable engine output.

In the case of a fuel intake system used in a large internal combustion engine, it may involve an ultra-high pressure environment. In an ultra-high pressure environment, durability damage such as valve abrasion is very likely to occur. In order to provide predictable and reliable engine output as described above, it is necessary to prevent damage to the durability of valves or at least to extend the durability preservation period. means are required

As a type of valve used in such a fuel inlet system, in the case of a conventional solenoid type valve, an actuator operated by an electric driving force is used as a force for lifting the disk to open the fluid passage, and a force for moving the disk to the initial position As such, the restoring force of the spring has been used.

However, the above-described electric drive type actuator has a unique advantage over hydraulic or pneumatic actuators, but has limitations in applying force to lift the disk in an ultra-high pressure environment.

On the other hand, the main advantage of electric actuators is that they generate high stability and continuous thrust that can be applied by the user. The anti-deviation ability of the electric actuator is very good, and the thrust or torque of the output is basically constant, so it can overcome the medium well.

In addition, balanced force, accurate control of process parameters, and higher control accuracy than pneumatic actuators. Using a servo amplifier, it is easy to exchange positive and negative effects, and it is also easy to set the status of the off signal valve position (hold/full open/full off).

Accordingly, there has been a demand in the industry for a technology that utilizes the advantages of the electric drive type actuator using the above-described electric drive type actuator and can be applied even in an ultra-high pressure environment.

KR 1233653 B1 KR 1156605 B1

The gas admission valve equipped with a means for assisting the disc opening force according to the present invention uses an electrically driven actuator to take advantage of the electrically driven actuator and solve problems that can be applied even in an ultra-high pressure environment.

According to the present invention, a gas admission valve equipped with a means for assisting disk opening force is a plate-shaped housing formed with an inner space, an inlet and an outlet, and a disk provided inside the housing to open and close the outlet, inserted into the center of the disk. It includes a stem for reciprocating the disk up and down, an actuator for providing a driving force for moving the stem upward, and a first elastic body for providing an elastic force applied to an upper surface of the disk in a direction opposite to the driving force, the actuator comprising: When operated, the disc moves upward to open the outlet, thereby reducing the pressure in the inner space, and when the pressure in the inner space is reduced below a set pressure range, the operation of the actuator is stopped so that the disc operates with the restoring force of the spring. It is characterized in that the movement to the initial position is repeated.

In addition, the gas admission valve protrudes from the center of the plate-shaped flange portion formed with an outside air passage penetrating the inside of the stem in the longitudinal direction and an outside air through hole communicating with the outside air passage, and the inside of the protruding portion is The stem is accommodated, and the outer end of the protruding portion includes a cover composed of a protruding portion contacting the upper surface of the disk, a second pressure discharge hole formed at one or more through a flange portion of the cover, and the second pressure discharge hole. It further includes a pressure release means composed of a cork blocking the ball and a second elastic body connected to the cork and increasing in length as the pressure in the inner space increases, wherein the inner space accommodates the disk and the first elastic body. A first chamber, a second chamber in which the flange portion is accommodated and communicates with the first chamber, a partition portion that surrounds the protruding portion and divides the first chamber and the second chamber, and is formed on an upper portion of the flange portion to allow the external air It is composed of a third chamber communicating with outside air through a passage and an outside air through hole, and as the pressure in the second chamber increases, the cork moves upward and when the second pressure discharge hole is opened, pressure is discharged to the outside air. do.

The end of the protrusion is connected to the upper surface of the disk, and an upward force corresponding to the area of the flange is applied by a pressure difference formed between the upper and lower surfaces of the flange to compensate for the force required to open the disk. characterized by

In the gas admission valve provided with a means for assisting the disc opening force according to the present invention, when the pressure in the inner space is below the set pressure range, the actuator stops operating, and the disc moves to the initial position with the restoring force of the spring. It works.

In addition, when the second pressure discharge hole is opened while the cork moves upward as the pressure in the second chamber increases, the pressure is discharged to the outside air.

In addition, the end of the protrusion is connected to the upper surface of the disk, and an upward force corresponding to the area of the flange is applied due to a pressure difference formed between the upper and lower surfaces of the flange, and the force required to open the disk (“disk opening force”) ) has a compensating effect.

1 is a conceptual diagram showing pressures of fluid passages, valves, actuators and respective parts to which a gas admission valve equipped with a means for assisting disc opening force according to the present invention can be applied.
2 is a view showing an initial position state of a gas admission valve equipped with a means for assisting disc opening force according to the present invention.
3 is a view showing an open position state of a gas admission valve provided with a means for assisting disc opening force according to the present invention.
4 shows a housing of a gas admission valve equipped with a means for assisting the disc opening force according to the present invention.
5 shows a cover of a gas admission valve equipped with a means for assisting a disc opening force according to the present invention.
6 shows a pressure release means of a gas admission valve equipped with a means for assisting a disc opening force according to the present invention.

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings. However, this is not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives of the embodiments of this document. . In connection with the description of the drawings, like reference numerals may be used for like elements.

In this document, expressions such as "has," "may have," "includes," or "may include" indicate the existence of a corresponding feature (eg, numerical value, function, operation, or component such as a part). , which does not preclude the existence of additional features.

In this document, expressions such as “A or B,” “at least one of A and/and B,” or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, “A or B,” “at least one of A and B,” or “at least one of A or B” (1) includes at least one A, (2) includes at least one B, Or (3) may refer to all cases including at least one A and at least one B.

Expressions such as "first," "second," "first," or "second," as used in this document may modify various elements, regardless of order and/or importance, and refer to one element as It is used only to distinguish it from other components and does not limit the corresponding components. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, without departing from the scope of rights described in this document, a first element may be called a second element, and similarly, the second element may also be renamed to the first element.

A component (e.g., a first component) is "(operatively or communicatively) coupled with/to" or "connected" to another component (e.g., a second component). When referred to as "connected to", it should be understood that the certain component may be directly connected to the other component or connected through another component (eg, a third component).

Terms used in this document are only used to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the technical field described in this document. Among the terms used in this document, terms defined in a general dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, an ideal or excessively formal meaning. not be interpreted as In some cases, even terms defined in this document cannot be interpreted to exclude the embodiments of this document.

Of course, various modifications can be made by those skilled in the art without departing from the gist of the present invention claimed in the claims of the present invention, and these modifications are the technical spirit of the present invention or It should not be understood individually from the perspective.

The terms "upper, lower, upper plate, lower plate" and the like used in the description of the invention are defined based on the drawings, and the shape and position of each component are not limited by these terms.

As shown in FIG. 2 , the gas admission valve according to an embodiment of the present invention may include a housing 100, a disk 200, a stem 300, an actuator 800, and a first elastic body 400.

An inner space 110, an inlet 120, and an outlet may be formed in the housing 100 as shown in FIG. 2, and the gas admission valve provided with a means for assisting the disc opening force according to the present invention When the pressure in the inner space 110 is increased to more than the set pressure by the high-pressure fluid introduced through the inlet 120, the pressure is discharged through the outlet to reduce the pressure in the inner space 110 to less than the set pressure. can be a tool for

The disk 200 provided inside the housing 100 is provided in a plate shape, and the stem 300 may be inserted and installed in the central portion of the disk 200 .

The stem 300 can be reciprocated up and down by the driving force of the actuator 800, and the stem 300 is connected, coupled, or in contact with the disk 200, so that the stem 300 moves. The movement of the disk 200 may be accompanied.

As an example of a means for moving the disk 200 and the stem 300 together, the stem 300 has a cylindrical stem 300 body (not shown) and one end that is smaller than the diameter of the stem 300 body. It may be formed as a stem 300 head portion (not shown) formed to have a large diameter.

In addition, a stem 300 insertion hole (not shown) may be formed in the center of the disk 200, and the stem 300 head portion is inserted into the stem 300 insertion hole to form the stem 300 head portion and the stem 300 head portion. The lower surface of the disk 200 may be brought into contact. Through this, the disk 200 can be moved along with the up and down reciprocating movement of the stem 300 .

Next, the first elastic body 400 may provide an elastic force acting in the opposite direction to the driving force provided by the actuator 800 to the upper surface of the disk 200 .

When the actuator 800 is operated through the configuration described above, the disk 200 is moved upward to open the outlet, thereby reducing the pressure in the inner space 110 .

In addition, when the pressure in the inner space 110 is reduced below the set pressure range, the operation of the actuator 800 is stopped, and the movement of the disk 200 to the initial position by the restoring force of the spring can be repeatedly performed. there is.

Here, the actuator 800 may be equipped with an electric driving method. The electrically driven actuator 800 may have difficulty opening the disk 200 in an ultra-high pressure environment.

In detail, the ultra-high pressure environment of the inner space 110 formed by the high-pressure fluid introduced through the inlet 120 requires strong force in an area where the actuator 800 is inefficient.

Here, the first contact surface 701 is A1, the pressure formed in the inner space 110 is P1, the pressure of the outside air is P2, and 1 The downward elastic restoring force provided by the elastic body 400 may be defined as F1, and the upward driving force provided by the actuator 800 may be defined as F2.

Here, when P1 >> P2 and F1 + P1 X A1 < F2 + P2 X A1, the disk 200 can be moved upward.

Here, one of the adjustable factors is F2 corresponding to the upward driving force provided by the actuator 800 . However, as described above, increasing the upward driving force of the electrically driven actuator 800 may have limitations in application to an ultra-high pressure environment.

Here, in order to satisfy F1 + P1 X A1 < F2 + P2 X A1, F1 + P1' X A1 < F2 + P2 X A1, P1 > P1' through a means for separately flowing P1 to P1' other than the outlet. can be made to decrease.

As described above, the gas admission valve according to the present invention as a means for reducing P1 to P1' through separate outflow includes an external air passage 301, a cover 500, a second pressure discharge hole 502, and a pressure discharge means. (600) may be further included.

As shown in FIG. 2 , the outdoor air passage 301 is a passage penetrating the inside of the stem 300 in the longitudinal direction.

In addition, the cover 500 is a means for shielding the inner space 110 from the top and is composed of a flange portion 501 and a protrusion portion 504 as shown in FIGS. 2 and 5 .

The flange portion 501 has a plate shape, and an outside air through hole 503 communicating with the outside air passage 301 may be formed.

The protruding portion 504 protrudes from the center of the flange portion 501, the stem 300 is accommodated inside the protruding portion, and the upper surface of the disk 200 is in contact with an outer end of the protruding portion. It can be.

One or more second pressure discharge holes 502 may be provided as through holes formed through the flange portion 501 of the cover 500 .

As shown in FIGS. 2 and 6 , the second pressure discharge hole 502 includes a cork 601 blocking the second pressure discharge hole 502 and is connected to the cork 601 to form the inner space 110 ) may be provided with a pressure discharge means 600 composed of a second elastic body 602 whose length increases as the pressure increases.

In addition, as shown in FIGS. 2 and 4, the inner space 110 of the housing 100 includes the first chamber 111 in which the disk 200 and the first elastic body 400 are accommodated, and the flange portion ( 501) is accommodated and the second chamber 112 communicates with the first chamber 111, and the partition part that divides the first chamber 111 and the second chamber 112 while surrounding the protrusion 504 ( 114) and a third chamber 113 formed on the upper portion of the flange portion 501 and communicating with the outside air through the outside air passage 301 and the outside air through hole 503.

Through the configuration described above, as the pressure of the second chamber 112 increases, the cork 601 moves upward, and when the second pressure discharge hole 502 is opened, the pressure can be discharged to the outside air. .

Expressing this as a formula, the cross-sectional area A2 formed by A1, P1, P2, F1, and F2 defined as described above and the second pressure discharge hole 502 is the second contact surface 702, the second elastic body 602 ) can be defined as F1'.

P1 is formed on the lower part of A2, which is the second contact surface 702, and P2 is formed on the upper part of A2 (P1 > P2)

Here, P2 is a constant, and as P1 increases, the cork 601 moves upward and the length of the second elastic body 602 increases, and when the cork 601 reaches the set position, the second pressure discharge hole As the 502 is opened, the pressure of P1 may be formed as P1'.

The force F4 acting on A2 can be expressed as F4 = (P1-P2) X A2 - F1', and when F4 > 0 is set by the large pressure difference between P1 and P2, the cork 601 moves upward. It can be.

In addition, even if the length of the second elastic body 602 is increased and the size of F1' is increased, if the pressure difference between P1 and P2 that can maintain F4 > 0 is maintained, the second pressure discharge hole by the cork 601 The shield of 502 is open so that P1 can be depressurized to P1'.

On the other hand, one or more second pressure discharge holes 502 are provided in the flange portion 501, and the area A2 of the second pressure discharge holes 502 is a plurality of second pressure discharge holes 502. By being provided, each area can be formed in a mutually different size, such as A2-1, A2-2, A2-3, etc. (not shown).

Through this, the second pressure discharge holes 502 having different areas are sequentially opened according to the size, so that the pressure can be discharged smoothly.

In addition, in order to satisfy F1 + P1 X A1 < F2 + P2 X A1, a separate downward force F3 may be set such as F1 + P1 X A1 < F2 + P2 X A1 + F3.

As described above, the gas admission valve according to the present invention may further include an outside air passage 301 and a cover 500 as a means for setting a separate downward force F3.

The outdoor air passage 301 may be configured in the same way as the means for reducing P1 to P1' through a separate outflow as described above.

In addition, the cover 500 is a means for shielding the inner space 110 from the top and is composed of a flange portion 501 and a protrusion portion 504 as shown in FIGS. 2 and 5 .

The flange portion 501 has a plate shape, and an outside air through hole 503 communicating with the outside air passage 301 may be formed.

The protruding portion 504 protrudes from the center of the flange portion 501, the stem 300 is accommodated inside the protruding portion, and the upper surface of the disk 200 is in contact with an outer end of the protruding portion. It can be.

In addition, as shown in FIGS. 2 and 4, the inner space 110 of the housing 100 includes the first chamber 111 in which the disk 200 and the first elastic body 400 are accommodated, and the flange portion ( 501) is accommodated and the second chamber 112 communicates with the first chamber 111, and the partition part that divides the first chamber 111 and the second chamber 112 while surrounding the protrusion 504 ( 114) and a third chamber 113 formed on the upper portion of the flange portion 501 and communicating with the outside air through the outside air passage 301 and the outside air through hole 503.

Through the configuration as described above, the end of the protruding portion 504 is connected to the upper surface of the disk 200, and the flange portion 501 is formed by a pressure difference formed between the upper and lower surfaces of the flange portion 501. An upward force corresponding to the area may be applied so that the force required to open the disk 200 is compensated.

Expressing this as a formula, A1 , P1 , P2 , F1 , F2 defined as described above and the cross-sectional area A3 formed by the lower surface of the flange portion 501 can be defined as the third contact surface 703 .

P1 is formed on the lower part of A3, which is the third contact surface 703, and P2 is formed on the upper part of A2 (P1 > P2)

Here, the force F3 acting on A3 can be expressed as F3 = (P1-P2) X A3, and the downward force F3 can be separately set as F3 > 0 due to the large pressure difference between P1 and P2.

That is, by setting a separate downward force F3 such as F1 + P1 X A1 < F2' + P2 X A1 + F3, the driving force F2 of the actuator 800 can be applied as a reduced force to F2'.

As described above, the technical idea of the present invention is to provide a gas admission valve equipped with a means for assisting the disc opening force, and the embodiments described above with reference to the drawings are only one embodiment, respectively, and the true spirit of the present invention. The scope of rights should be determined by the claims stated in the claims.

100: housing
110: inner space
111: first chamber
112: second chamber
113: third chamber
114: partition unit
120: inlet
130: first pressure discharge hole
200: disk
300: stem
301: outdoor air passage
400: first elastic body
500: cover
501: flange part
502: second pressure discharge hole
503: outside air passage
504: protrusion
600: pressure relief means
601: cork
602: second elastic body
700: contact surface
701: first contact surface
702: second contact surface
703 third contact surface
800: actuator

Claims (3)

A housing having an inner space, an inlet and an outlet;
A plate-shaped disk provided inside the housing to open and close the outlet;
a stem inserted into the center of the disk to allow the disk to reciprocate up and down;
an actuator providing a driving force for moving the stem upward; and
A first elastic body providing an elastic force acting in the opposite direction to the driving force on the upper surface of the disk; includes,
When the actuator is operated, the disk moves upward to open the outlet, thereby reducing the pressure in the internal space;
When the pressure in the inner space is reduced below a set pressure range, the operation of the actuator is stopped and the disk is repeatedly moved to the initial position by the restoring force of the spring. gas admission valve. The method of claim 1,
The gas admission valve provided with means for assisting the disc opening force,
an external air passage penetrating the inside of the stem in a longitudinal direction;
A plate-shaped flange portion having an outside air through hole communicating with the outside air passage; and protruding from the center of the flange portion, the stem is accommodated inside the protruding portion, and the upper surface of the disk is in contact with an outer end of the protruding portion. A cover comprising a protrusion to shield the inner space from the top;
one or more second pressure discharge holes passing through the flange portion of the cover;
A pressure discharge means composed of a cork blocking the second pressure discharge hole and a second elastic body that is connected to the cork and increases in length as the pressure in the inner space increases,
The inner space is
A first chamber accommodating the disk and the first elastic body, a second chamber accommodating the flange portion and communicating with the first chamber, a partition portion dividing the first chamber and the second chamber while surrounding the protrusion, and the planar It is formed on the upper part of the branch and consists of a third chamber communicating with the outside air through the outside air passage and the outside air through hole,
The gas admission valve provided with a means for assisting the disc opening force, characterized in that the pressure is discharged to the outside air when the second pressure discharge hole is opened while the cork moves upward as the pressure in the second chamber increases. The method of claim 1,
The gas admission valve provided with means for assisting the disc opening force,
an external air passage penetrating the inside of the stem in a longitudinal direction;
A plate-shaped flange portion having an outside air through hole communicating with the outside air passage; and protruding from the center of the flange portion, the stem is accommodated inside the protruding portion, and the upper surface of the disk is in contact with an outer end of the protruding portion. It is composed of; a protrusion that is; and a cover for shielding the inner space from the top; further comprising,
The inner space is
A first chamber accommodating the disk and the first elastic body, a second chamber accommodating the flange portion and communicating with the first chamber, a partition portion dividing the first chamber and the second chamber while surrounding the protrusion, and the planar It is formed on the upper part of the branch and consists of a third chamber communicating with the outside air through the outside air passage and the outside air through hole,
The end of the protrusion is connected to the upper surface of the disk, and an upward force corresponding to the area of the flange is applied by a pressure difference formed between the upper and lower surfaces of the flange to compensate for the force required to open the disk. A gas admission valve provided with a means for assisting a disc opening force, characterized in that.

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