WO2010035323A1 - 減圧弁 - Google Patents
減圧弁 Download PDFInfo
- Publication number
- WO2010035323A1 WO2010035323A1 PCT/JP2008/067314 JP2008067314W WO2010035323A1 WO 2010035323 A1 WO2010035323 A1 WO 2010035323A1 JP 2008067314 W JP2008067314 W JP 2008067314W WO 2010035323 A1 WO2010035323 A1 WO 2010035323A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- valve
- diaphragm
- spring
- pressure reducing
- Prior art date
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- 239000006096 absorbing agent Substances 0.000 claims abstract description 42
- 238000004891 communication Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 239000003566 sealing material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 22
- 238000013016 damping Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000001629 suppression Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/02—Modifications to reduce the effects of instability, e.g. due to vibrations, friction, abnormal temperature, overloading or imbalance
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
- G05D16/0663—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using a spring-loaded membrane with a spring-loaded slideable obturator
- G05D16/0669—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using a spring-loaded membrane with a spring-loaded slideable obturator characterised by the loading mechanisms of the membrane
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7793—With opening bias [e.g., pressure regulator]
- Y10T137/7796—Senses inlet pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7793—With opening bias [e.g., pressure regulator]
- Y10T137/7801—Balanced valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7793—With opening bias [e.g., pressure regulator]
- Y10T137/7809—Reactor surface separated by apertured partition
- Y10T137/782—Reactor surface is diaphragm
- Y10T137/7821—With valve closing bias
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
Definitions
- the present invention relates to a pressure reducing valve that adjusts a pressure fluid supplied from a fluid supply source to a predetermined pressure and supplies the pressure fluid to a fluid pressure operating device.
- a pressure reducing valve is used to adjust compressed air supplied from a pneumatic source, which is a fluid supply source, to a predetermined pressure and supply it to a pneumatic operating device such as a pneumatic cylinder.
- This pressure reducing valve has, for example, a primary side port to which compressed air is supplied and a secondary side port to which a pneumatic actuator is connected, as described in Patent Document 1, and a communication hole for communicating these ports.
- the opening end of the valve is opened and closed by a valve body, and a spring force is applied to the valve body in a direction to close the valve seat of the opening end by a valve spring.
- the pressure reducing valve has a diaphragm that is elastically deformed by a differential pressure between the set pressure of the secondary port and the atmospheric pressure, and the diaphragm is formed with a relief hole for discharging the secondary air to the outside.
- the tip of the stem attached to the valve body abuts on the diaphragm so as to close the relief hole, and the diaphragm is applied with spring force in the direction of opening the valve seat via the stem by the pressure regulating spring. ing.
- the diaphragm when the secondary pressure rises above the set pressure, the diaphragm is displaced in a direction away from the valve body, the diaphragm is separated from the tip of the stem, the relief hole is opened, and the secondary pressure is discharged to the outside. .
- the pressure on the secondary side decreases, the diaphragm comes into contact with the stem and the relief hole is closed. Therefore, for example, when the pressure used in the pneumatic circuit having the pneumatic operating device is reduced, when the compressed air supplied to the pneumatic operating device is reduced, the pressure on the secondary side is newly set lower. Thereby, the compressed air in the secondary side pipe is exhausted to the outside through the relief hole up to a newly set pressure.
- the compressed air in the secondary side piping is relieved to keep the set pressure constant. It is exhausted to the outside through the hole.
- a dynamic vibration absorber is known as a vibration damper that suppresses vibration of a vibrating body.
- the dynamic vibration absorber includes a mass body, a spring, and a damper, and the mass body is attached to the object to be controlled via the spring and the damper.
- the vibration suppression target vibrates
- the mass body of the dynamic vibration absorber vibrates, and a part of the vibration energy of the vibration suppression target is converted into the vibration energy of the mass body, thereby suppressing the vibration of the vibration suppression target.
- Patent Document 2 describes a dynamic vibration absorber for absorbing vibration of a substrate of an electric device
- Patent Document 3 describes a dynamic vibration absorber for suppressing vibration generated from an electric mechanism incorporated in a microscope. ing.
- Dynamic vibration absorbers are said to be dynamic vibration absorbers or dynamic vibration reducers.
- the pressure of the compressed air supplied to the secondary port is set and the pneumatic operation device such as a pneumatic cylinder operates intermittently, the secondary air is consumed and the pressure also fluctuates intermittently.
- the valve seat is frequently opened and closed by the body, the frequency of the compressed air flowing pulsating from the primary port to the secondary port matches the natural frequency of the movable part including the valve body. Resonates.
- the opening of the valve seat does not become a predetermined opening corresponding to the set pressure on the secondary side, so the pressure on the secondary side fluctuates and deviates from the set pressure, and the pressure regulation stability of the pressure reducing valve Will be reduced.
- a sliding resistance such as an O-ring attached to the valve body or the stem is used as a damping element. It was necessary to design with consideration.
- a method of reducing the mobility of the diaphragm by designing a large elastic coefficient of the diaphragm, a rubber material, etc.
- a method of attaching to a valve body or a stem as a damping element is employed. As described above, providing the damping element in each of the valve body and the diaphragm is a factor that hinders the opening and closing movement of the valve body, and remarkably impairs the pressure regulation response performance of the pressure reducing valve.
- the vibration system in the pressure reducing valve is different between the pressure adjustment when the valve element operates and the exhaust time when the air at the secondary side port is exhausted to the outside.
- the vibration system of the valve body vibrates at the time of pressure adjustment
- the diaphragm vibration system vibrates because the diaphragm separates from the valve body at the time of exhaust.
- the dynamic vibration absorbers are attached to the respective vibration systems, and it is difficult to attach a plurality of dynamic vibration absorbers in a limited space.
- an air flow path is formed in the pressure reducing valve, and mounting a dynamic vibration absorber in a portion that does not impede the flow of air degrades the pressure regulation characteristics.
- An object of the present invention is to improve the pressure regulation stability of the pressure reducing valve.
- An object of the present invention is to improve the pressure regulation stability of the pressure reducing valve by suppressing the vibration of the valve body and the diaphragm without inhibiting the air flow.
- An object of the present invention is to improve the durability of the pressure reducing valve by suppressing the vibration of the valve body and the diaphragm.
- the pressure reducing valve includes a primary side port to which pressure fluid is supplied, a housing having a secondary side port that communicates with the primary side port through a communication hole and flows out the pressure fluid, and an opening of the communication hole.
- a valve assembly having a valve body that opens and closes a valve seat formed on the side, a valve spring that biases a spring force in a direction to close the valve seat relative to the valve body, and opposed to the valve body
- a pressure adjusting diaphragm mounted on the housing and defining a pressure adjusting chamber communicating with the secondary port and a spring chamber communicating with the outside, a retainer provided on the pressure adjusting diaphragm, and the retainer facing the retainer
- a diaphragm assembly having a pressure regulating spring mounted between a spring receiving member arranged in a spring chamber and biasing a spring force in a direction to open the valve body from the valve seat to the valve body, and formed in the retainer A stem that constitutes the valve assembly by applying a spring force of the pressure
- the dynamic vibration absorber includes an annular damper that is fixed to a tip of a support rod that is provided on the retainer so as to protrude toward the spring receiving member, and an annular mass body that is provided on the annular damper. And a spring member mounted between the diaphragm and the annular mass body.
- the retainer has a disk portion provided with the support rod and abutted against the diaphragm, and is mounted between the disk portion and the spring receiving member.
- the dynamic vibration absorber is mounted on the inner side of the support rod while being positioned at the tip of the support rod.
- the pressure reducing valve according to the present invention includes a natural vibration frequency of the dynamic vibration absorber, a natural frequency of a diaphragm vibration system constituted by the diaphragm assembly, and a composite vibration system composed of the valve assembly and the diaphragm assembly. It is characterized by being different from the natural frequency.
- a seal member that seals communication between the secondary port and the pressure regulating chamber is provided at the distal end portion of the stem through a through hole that slidably supports the distal end portion of the stem. It is characterized by that.
- a diaphragm for supporting the stem movably in the opening and closing direction of the relief hole and sealing the communication between the secondary side port and the pressure regulating chamber is provided at the distal end portion of the stem.
- the pressure reducing valve of the present invention is characterized by having a pressure balance sealing material that seals between the valve body and a guide hole that is formed in the housing and incorporates the valve body.
- the pressure reducing valve of the present invention includes a pressure balance diaphragm that seals between the valve body and a guide hole that is formed in the housing and incorporates the valve body.
- the dynamic vibration absorber attached to the diaphragm assembly causes the valve assembly and the diaphragm assembly to Vibration generation is prevented.
- the vibration of the diaphragm assembly is prevented from being generated by the dynamic vibration absorber attached to the diaphragm assembly.
- vibrations of the valve assembly and the diaphragm assembly can be suppressed, deterioration and wear of the valve body and the diaphragm can be reduced, and the durability of the pressure reducing valve can be improved. At the same time, generation of vibration noise is prevented and the work environment can be improved.
- the dynamic vibration absorber can prevent synchronized vibration between the valve assembly and the diaphragm assembly, and can also prevent vibration of the diaphragm assembly. Therefore, one dynamic vibration absorber can be used during operation of the pressure reducing valve. Vibration generation can be prevented.
- the dynamic vibration absorber is incorporated in the pressure regulating spring of the diaphragm assembly, the dynamic vibration absorber is prevented from obstructing the air flow in the pressure reducing valve without increasing the size of the pressure reducing valve.
- FIG. 1 It is sectional drawing of the pressure-reduction valve which is one embodiment of this invention.
- A is sectional drawing which shows the valve assembly and diaphragm assembly of a pressure-reduction valve at the time of pressure regulation
- B is sectional drawing which shows the valve assembly and diaphragm assembly at the time of exhaust_gas
- A) is a vibration model of the composite vibration system at the time of pressure adjustment
- B) is a vibration model of the diaphragm vibration system at the time of exhaust.
- the pressure reducing valve includes a housing 11.
- the housing 11 includes a housing body 12, a cap 13 attached to the housing body 12, and a bonnet 14 attached to the housing body 12 so as to face the cap 13. It is comprised by.
- the housing body 12 has a primary port 15 communicated with a compressed air supply source as a fluid pressure supply source, and a secondary port 16 communicated with a pneumatic operation device as a fluid pressure operation device such as a pneumatic cylinder.
- a compressed air supply source as a fluid pressure supply source
- a secondary port 16 communicated with a pneumatic operation device as a fluid pressure operation device such as a pneumatic cylinder.
- the housing is formed so as to be coaxial, and the communication hole 17 for communicating the primary side port 15 and the secondary side port 16 is oriented in a direction perpendicular to the central axis of both the ports 15, 16.
- the main body 12 is formed.
- the communication hole 17 has an opening facing the cap 13, and a valve seat 18 is formed on the housing body 12 on the opening side of the communication hole 17.
- a valve body 21 is mounted in the cap 13 so as to be capable of reciprocating in the axial direction.
- the valve body 21 is in contact with the valve seat 18 to close it, and is separated from the valve seat 18 to open it. Operate.
- the valve body 21 is incorporated into a guide hole 22 formed in the cap 13 and is slidably fitted into a shaft portion 21a.
- a flange portion 21b that is integrally provided at the tip of the shaft body 21 and faces the valve seat 18 have.
- a rubber seal member 23 that contacts the valve seat 18 is provided on the front surface of the flange portion 21b.
- the shaft portion 21 a is provided with a pressure balancing seal member 24 that contacts the inner peripheral surface of the guide hole 22 and seals the communication between the shaft portion 21 a of the valve body 21 and the primary port 15 and the secondary port 16. ing.
- a pressure reducing valve of a type in which the seal member 24 is not provided on the shaft portion 21a of the valve body 21 may be used.
- the cap 13 has a cylindrical mounting portion 13 a provided with a male screw that is screwed to a female screw formed in the housing body 12, and a guide cylinder portion 13 b that is integrated with the cap 13 and has a guide hole 22.
- a compression coil spring is incorporated as a valve spring 25 in the space between the mounting portion 13a and the guide tube portion 13b.
- One end surface of the valve spring 25 is in contact with the outer surface of the flange portion 21 b of the valve body 21, and the other end surface is in contact with the inner surface of the cap 13.
- the valve spring 21 closes the valve seat 18 on the valve body 21.
- Directional spring force is applied.
- the valve body 21 and the valve spring 25 constitute a valve assembly 26.
- a rubber pressure adjusting diaphragm 27 is sandwiched between the housing body 12 and a bonnet 14 screwed to the housing main body 12, and a reinforcing disk 28 is attached to the pressure adjusting diaphragm 27. .
- the pressure regulating diaphragm 27 divides the spring chamber 31 inside the bonnet 14 and the pressure regulating chamber 32 on the housing body 12 side.
- An aspirator 33 made of a pipe member is attached to the housing body 12. One end of the aspirator 33 opens into the pressure adjusting chamber 32, and the other end opens into the secondary side port 16, and the pressure adjusting chamber 32 communicates with the secondary side port 16 through the pilot hole 34 of the aspirator 33. Yes.
- the spring chamber 31 is communicated to the outside by a bleed port 35 formed in the bonnet 14, and the spring chamber 31 is in an atmospheric pressure state.
- a retainer 36 is attached to the pressure regulating diaphragm 27 on the spring chamber 31 side via a reinforcing disk 28, and the retainer 36 has a disk portion 36 a that is abutted against the pressure regulating diaphragm 27 via the reinforcing disk 28 and this. And a support rod portion 36b protruding in the axial direction.
- Relief holes 37 for communicating the pressure regulating chamber 32 and the spring chamber 31 are formed in the shaft centers of the pressure regulating diaphragm 27, the reinforcing disk 28, and the retainer 36.
- a diaphragm assembly 38 is formed by the pressure regulating diaphragm 27, the reinforcing disk 28, the retainer 36 and the pressure regulating spring 43.
- the bonnet 14 has a cylindrical portion 14b in which an end wall portion 14a is integrated, and a male screw that is screwed to a female screw formed in the housing body 12 is formed at the open end of the cylindrical portion 14b. Is screwed to the housing body 12.
- An adjustment screw shaft 39 is rotatably mounted on the end wall portion 14 a, and a male screw 40 of the adjustment screw shaft 39 is screwed to a spring receiving member 42 disposed in the spring chamber 31.
- a compression coil spring is mounted as a pressure regulating spring 43 between the spring receiving member 42 and the disk portion 36 a of the retainer 36 fixed to the pressure regulating diaphragm 27, and the valve body is attached to the pressure regulating diaphragm 27 by the pressure regulating spring 43.
- a spring force in the direction of opening the valve body 21 from the valve seat 18 toward the valve 21 is applied.
- an operation handle 44 is attached to the adjustment screw shaft 39.
- the spring receiving member 42 is moved in the axial direction by rotating the adjustment screw shaft 39 via the operation handle 44, the expansion / contraction amount of the pressure adjusting spring 43 is adjusted.
- the spring force applied to the pressure adjusting diaphragm 27 is adjusted according to the amount of expansion and contraction.
- a lock cover 45 is attached to the operation handle 44, and the operation handle 44 is operated by the lock cover 45. When the lock cover 45 is moved in the axial direction, the rotation of the operation handle 44 is restricted.
- a stem 46 made of, for example, a metal rod-like member is attached to the valve body 21, and the stem 46 constitutes a part of the valve assembly 26.
- the base end portion of the stem 46 is fitted in an attachment hole formed in the valve body 21, and the stem 46 is fixed to the valve body 21 by a locking portion formed in the base end portion.
- the distal end portion of the stem 46 passes through a through hole 47 formed in the housing main body 12, and the distal end surface 49 is hemispherical.
- An O-ring 48 that is in sliding contact with the inner surface of the through hole 47 is attached to the distal end portion of the stem 46, and the distal end portion of the stem 46 is supported by the housing body 12, and the pressure adjustment with the communication hole 17 is performed by the O-ring 48.
- the space between the chambers 32 is sealed.
- the stem 46 can reciprocate in the axial direction together with the valve body 21.
- the relief hole 37 is closed, and when the pressure adjusting diaphragm 27 moves away from the stem 46.
- the relief hole 37 is opened.
- the pressure of the pressure adjusting chamber 32 decreases due to the pilot hole 34 of the aspirator 33 communicating with the pressure adjusting chamber 32, and as shown in FIG.
- the valve element 21 is driven by the pressure adjusting spring 43 through the pressure adjusting diaphragm 27 and the stem 46 in the direction away from the valve seat 18, and the valve element 21 is opened. become.
- the opening degree of the valve body 21 at this time varies according to the pressure in the pressure regulating chamber 32, and the pressure in the secondary port 16 is regulated to the set pressure.
- the pressure of the secondary side port 16 becomes lower than the pressure set by the spring force of the pressure regulating spring 43, the compressed air flows from the primary side port 15 to the secondary side port 16 through the communication hole 17.
- the pressure of the compressed air supplied to the secondary port 16 is adjusted to a set value.
- the pressure of the compressed air that flows into the spring chamber 31 and is discharged from the bleed port 35 and supplied to the secondary port 16 is adjusted to a set value. For example, when reducing the pressure used in a pneumatic circuit provided with a pneumatic actuator, the pressure on the secondary side is newly set lower when the compressed air supplied to the pneumatic actuator is reduced. . As a result, the compressed air in the secondary port 16 is exhausted to the outside through the relief hole 37 up to the newly set pressure. Further, when the set pressure on the secondary side rises due to the external load acting in the direction opposite to the rod operating direction, such as a pneumatic cylinder, the compressed air in the secondary side port 16 is relieved to keep the set pressure constant. It is exhausted to the outside through the hole 37.
- the pressure reducing valve includes a valve assembly 26 constituted by a valve body 21, a stem 46 and a valve spring 25, and a diaphragm assembly 38 constituted by a pressure regulating diaphragm 27, a reinforcing disk 28, a retainer 36 and a pressure regulating spring 43. Each of them vibrates in accordance with the pressure state in the flow path. Focusing on the vibration phenomenon, the valve assembly 26 constitutes a valve body vibration system, and the diaphragm assembly 38 constitutes a diaphragm vibration system.
- valve assembly 26 and the diaphragm assembly 38 operate in synchronism during pressure regulation when the valve body 21 is opened and closed, the frequency due to the pulsation of the air flowing from the primary side port 15 to the secondary side port 16 is determined by the valve assembly.
- the composite natural frequency of the composite vibration system formed by 26 and the diaphragm assembly 38 is approached, vibration noise is generated due to resonance and pressure adjustment stability is reduced.
- the valve assembly 26 when exhausting the air in the secondary side port 16 to the outside through the relief hole 37, the valve assembly 26 is restricted from moving because the valve body 21 abuts against the valve seat 18, and the diaphragm assembly 38 is Since the operation state is separated from the valve assembly 26, the vibration frequency due to the pulsation of the air discharged from the secondary side port 16 through the relief hole 37 is the characteristic of the diaphragm vibration system formed by the diaphragm assembly 38. When approaching the frequency, resonating causes vibration noise and lowers pressure regulation stability.
- a dynamic vibration absorber 50 is mounted on the support rod portion 36b of the retainer 36 in order to suppress the above-described vibrations.
- the dynamic vibration absorber 50 includes a coil spring 51 as a spring member, a rubber-made annular damper 52 as a damping member, and an annular weight member, that is, an annular mass body 53.
- One end surface of the annular damper 52 is fixed to a mounting plate 54 fixed to the tip of the support rod portion 36b, and an annular mass body 53 is fixed to the other end surface.
- a coil spring 51 is mounted between the annular mass 53 and the disk portion 36a of the retainer 36.
- the dynamic vibration absorber 50 is incorporated in the retainer 36 by being positioned inside the pressure regulating spring 43 mounted in the spring chamber 31 using the space inside the pressure regulating spring 43.
- the support rod portion 36b of the retainer 36 is concentric with the central axis of the pressure adjusting diaphragm 27, and a dynamic vibration absorber 50 having a generally cylindrical shape is attached to the outside of the support rod portion 36b.
- the dynamic vibration absorber 50 is disposed outside the support rod portion 36b, the flow of air flowing into the spring chamber 31 from the relief hole 37 in the support rod portion 36b is obstructed by the dynamic vibration absorber 50. There is nothing.
- the dynamic vibration absorber 50 is mounted concentrically with the central axis of the support rod portion 36b, the direction in which the valve element 21 and the pressure adjusting diaphragm 27 are inclined even if they move in the axial direction. No load is applied to the.
- FIG. 3A is a vibration model of a composite vibration system during pressure adjustment
- FIG. 3B is a vibration model of a diaphragm vibration system during exhaust.
- m is the mass of the annular mass 53
- c is the damping coefficient of the annular damper 52
- k is the spring constant of the coil spring 51
- K1 is the spring constant of the pressure regulating spring 43
- K2 is the valve spring 25
- M1 is the mass of the diaphragm assembly 38
- M2 is the mass of the valve assembly 26.
- the natural frequency ⁇ of the dynamic vibration absorber 50 is the natural frequency.
- the number is different from ⁇ 1 and the composite natural frequency ⁇ c.
- the opening degree of the valve body 21 is prevented from greatly deviating from a predetermined opening degree corresponding to the pressure of the pressure regulating chamber 32, and the pressure of the secondary side port 16 can be stabilized to the set pressure with high accuracy. it can.
- the pressure adjusting diaphragm 27 moves away from the stem 46 during exhaust.
- the vibration is moved to the vibration suppression target composed of the mass M1 fixed to the spring member having the spring constant K1.
- This is a vibration model of a diaphragm vibration system to which the vibration absorber 50 is attached. Since the natural frequency ⁇ 1 of the diaphragm vibration system at this time is different from the natural frequency ⁇ of the dynamic vibration absorber 50, the vibration of the diaphragm assembly 38 is quickly suppressed by the dynamic vibration absorber 50. Thereby, the air in the secondary side port 16 is discharged
- the dynamic vibration absorber 50 is mounted in the spring chamber 31 of the pressure regulating diaphragm 27 of the pressure reducing valve, the diaphragm assembly 38 and the diaphragm assembly 38 are not affected during the pressure regulation without affecting the opening and closing of the valve seat 18 and the relief hole 37.
- the vibration of the valve assembly 26 is quickly suppressed, and the vibration of the diaphragm assembly 38 is quickly suppressed during exhaust.
- the occurrence of each resonance phenomenon is prevented, it is possible to suppress the wear of the O-ring 48 and the deterioration of the pressure adjusting diaphragm 27 and improve the durability of the pressure reducing valve.
- FIG. 4 is a sectional view showing a pressure reducing valve according to another embodiment of the present invention.
- a seal member 24 is attached to the shaft portion 21 a of the valve body 21 to support the valve body 21 slidably in the axial direction, and an O-ring 48 is attached to the distal end portion of the stem 46.
- the stem 46 is slidably supported in the axial direction.
- a pressure balancing diaphragm 55 is provided in the guide hole 22 of the cap 13 that constitutes the housing 11 and in which the valve body 21 is incorporated.
- valve body 21 is supported by the housing 11 so as to be movable back and forth in the axial direction.
- a diaphragm 56 is provided at the distal end portion of the stem 46 so as to support the stem 46 so as to be movable in the opening and closing direction of the relief hole 37 and to shut off and seal the communication between the secondary side port 16 and the pressure regulating chamber 32. Yes.
- the valve body 21 and the stem 46 do not slide on the housing 11, so that the guide hole 22 and the seal member are secured in order to ensure the slidability between the valve body 21 and the stem 46 as shown in FIG.
- the pressure reducing valve shown in FIG. 4 can also be used for pneumatically operated equipment of oil-prohibited specifications that needs to prevent oil from being mixed into the air. As described above, even in the pressure reducing valve corresponding to the oil-free pneumatic operating device, the same effect as that of the above embodiment can be obtained by attaching the dynamic vibration absorber 50 to the pressure regulating diaphragm 27 on the spring chamber 31 side.
- the cap 13 includes a flange-shaped attachment portion 13a that is fixed to the housing body 12 by a fastening member such as a screw, and a guide tube portion that is integrated with the cap 13 and has a guide hole 22 formed therein. 13b.
- the valve spring 25 is attached to the end of the shaft portion 21 a of the valve body 21 and is disposed inside the guide hole 22.
- the retainer 36 has a disk portion 36 a that is abutted against the pressure adjusting diaphragm 27, and a support rod portion 36 b that penetrates the central portion in the radial direction of the pressure adjusting diaphragm 27.
- a relief hole 37 is formed in the shaft center of the support rod portion 36b.
- a pressure adjusting spring 43 and a coil spring 51 are mounted on the disk portion 36 a via spring receiving members 57 and 58, and an operation handle 44 for adjusting the amount of expansion and contraction of the pressure adjusting spring 43 includes a lock cover 45. There is no type.
- the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.
- the mass body may be attached to the pressure adjusting diaphragm 27 so as to be movable relative to the pressure adjusting diaphragm by a spring member and a damping member.
- a spring member and a damping member may be attached to the pressure adjusting diaphragm 27 so as to be movable relative to the pressure adjusting diaphragm by a spring member and a damping member.
- the pressure reducing valve is used in a pneumatic circuit for adjusting the compressed air supplied from the compressor to a predetermined set pressure and supplying it to a pneumatic actuator such as a pneumatic cylinder.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Safety Valves (AREA)
Abstract
Description
Claims (8)
- 圧力流体が供給される一次側ポート、および当該一次側ポートに連通孔を介して連通するとともに圧力流体を流出する二次側ポートを有するハウジングと、
前記連通孔の開口部側に形成された弁座を開閉する弁体、および当該弁体に対して前記弁座を閉じる方向にばね力を付勢する弁ばねを有する弁組立体と、
前記弁体に対向して前記ハウジングに装着され前記二次側ポートに連通する調圧室と外部に連通するばね室とを区画形成する調圧ダイヤフラム、および当該調圧ダイヤフラムに設けられたリテーナと当該リテーナに対向して前記ばね室内に配置されたばね受け部材との間に装着され前記弁座から前記弁体を開放する方向のばね力を前記弁体に付勢する調圧ばねを有するダイヤフラム組立体と、
前記リテーナに形成され前記調圧室と前記ばね室とを連通させるリリーフ孔を開閉する先端面を有し、前記調圧ばねのばね力を前記弁体に加え、前記弁組立体を構成するステムと、
前記リテーナに取り付けられて前記ばね室内に配置され、前記ダイヤフラムが前記ステムから離れたときには前記ダイヤフラム組立体の振動を抑制し、前記弁組立体が前記ダイヤフラム組立体とともに前記弁座を開閉移動して前記二次側ポートの圧力を調整するときには前記ダイヤフラム組立体と前記弁組立体の振動を抑制する動吸振器とを有することを特徴とする減圧弁。 - 請求項1記載の減圧弁において、前記動吸振器は、前記リテーナに前記ばね受け部材に向けて突出して設けられた支持ロッドの先端に固定される環状ダンパと、当該環状ダンパに設けられる環状質量体と、前記ダイヤフラムと前記環状質量体との間に装着されるばね部材とを有することを特徴とする減圧弁。
- 請求項2記載の減圧弁において、前記リテーナは、前記支持ロッドが設けられるとともに前記ダイヤフラムに突き当てられるディスク部を有し、当該ディスク部と前記ばね受け部材との間に装着される前記調圧ばねの内側に前記動吸振器を前記支持ロッドの先端に位置させて装着することを特徴とする減圧弁。
- 請求項1~3のいずれか1項に記載の減圧弁において、前記動吸振器の固有振動数を、前記ダイヤフラム組立体により構成されるダイヤフラム振動系の固有振動数と、前記弁組立体および前記ダイヤフラム組立体からなる複合振動系の複合固有振動数とに相違させることを特徴とする減圧弁。
- 請求項1~4のいずれか1項に記載の減圧弁において、前記ステムの先端部を摺動自在に支持する貫通孔を介して前記二次側ポートと前記調圧室との連通をシールするシール材を前記ステムの先端部に設けることを特徴とする減圧弁。
- 請求項1~4のいずれか1項に記載の減圧弁において、前記ステムを前記リリーフ孔の開閉方向に移動自在に支持するとともに前記二次側ポートと前記調圧室との連通をシールするダイヤフラムを前記ステムの先端部に設けることを特徴とする減圧弁。
- 請求項1~6のいずれか1項に記載の減圧弁において、前記ハウジングに形成され前記弁体が組み込まれるガイド孔と前記弁体との間をシールする圧力バランス用のシール材を有することを特徴とする減圧弁。
- 請求項1~6のいずれか1項に記載の減圧弁において、前記ハウジングに形成され前記弁体が組み込まれるガイド孔と前記弁体との間をシールする圧力バランス用のダイヤフラムを有することを特徴とする減圧弁。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008801312982A CN102165387B (zh) | 2008-09-25 | 2008-09-25 | 压力调节器 |
KR1020117006258A KR101195328B1 (ko) | 2008-09-25 | 2008-09-25 | 압력 조절기 |
PCT/JP2008/067314 WO2010035323A1 (ja) | 2008-09-25 | 2008-09-25 | 減圧弁 |
JP2010530654A JP4819967B2 (ja) | 2008-09-25 | 2008-09-25 | 減圧弁 |
US13/061,775 US8869827B2 (en) | 2008-09-25 | 2008-09-25 | Pressure regulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/067314 WO2010035323A1 (ja) | 2008-09-25 | 2008-09-25 | 減圧弁 |
Publications (1)
Publication Number | Publication Date |
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WO2010035323A1 true WO2010035323A1 (ja) | 2010-04-01 |
Family
ID=42059341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2008/067314 WO2010035323A1 (ja) | 2008-09-25 | 2008-09-25 | 減圧弁 |
Country Status (5)
Country | Link |
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US (1) | US8869827B2 (ja) |
JP (1) | JP4819967B2 (ja) |
KR (1) | KR101195328B1 (ja) |
CN (1) | CN102165387B (ja) |
WO (1) | WO2010035323A1 (ja) |
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CN117028197A (zh) * | 2023-08-07 | 2023-11-10 | 烟台东德氢能技术有限公司 | 一种循环液恒压差循环方法 |
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JP5740402B2 (ja) * | 2011-05-17 | 2015-06-24 | 株式会社コガネイ | パイロット式減圧弁 |
JP5889649B2 (ja) * | 2012-01-26 | 2016-03-22 | サーパス工業株式会社 | 流量調整装置 |
JP5889648B2 (ja) | 2012-01-26 | 2016-03-22 | サーパス工業株式会社 | 流量調整装置 |
US9664409B2 (en) * | 2012-06-14 | 2017-05-30 | Honeywell International Inc. | HVAC damper system |
CN202972080U (zh) * | 2012-10-22 | 2013-06-05 | 费希尔久安输配设备(成都)有限公司 | 一种阀组件 |
KR101398444B1 (ko) * | 2013-11-06 | 2014-05-27 | 주식회사 코베아 | 밸브 |
US10215320B2 (en) | 2015-07-02 | 2019-02-26 | InDyne Inc. | Instability suppression device for pressure control valves |
TWI733811B (zh) | 2016-05-25 | 2021-07-21 | 美商鐵鎖公司 | 具有自行對準桿尖部之閥 |
JP6864533B2 (ja) * | 2017-04-18 | 2021-04-28 | アズビル株式会社 | 空気圧制御装置および調節弁 |
EP3743782B1 (en) * | 2018-01-22 | 2022-05-18 | Valco Industries, Inc. | Pressure regulator and livestock watering system comprising corresponding pressure regulators |
EP3887657A4 (en) | 2018-11-27 | 2022-07-20 | Smith & Burgess Process Safety Consulting | RESONATOR FOR A PRESSURIZED FLUID SYSTEM |
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Also Published As
Publication number | Publication date |
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JP4819967B2 (ja) | 2011-11-24 |
KR20110055664A (ko) | 2011-05-25 |
US8869827B2 (en) | 2014-10-28 |
KR101195328B1 (ko) | 2012-10-29 |
US20110162737A1 (en) | 2011-07-07 |
CN102165387A (zh) | 2011-08-24 |
JPWO2010035323A1 (ja) | 2012-02-16 |
CN102165387B (zh) | 2013-04-24 |
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