EP3612907A2 - Actionneur avec diaphragme à résistance de pression augmentée - Google Patents

Actionneur avec diaphragme à résistance de pression augmentée

Info

Publication number
EP3612907A2
EP3612907A2 EP18847747.5A EP18847747A EP3612907A2 EP 3612907 A2 EP3612907 A2 EP 3612907A2 EP 18847747 A EP18847747 A EP 18847747A EP 3612907 A2 EP3612907 A2 EP 3612907A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
reservoir
flange
wax
actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18847747.5A
Other languages
German (de)
English (en)
Other versions
EP3612907A4 (fr
Inventor
Orhan MERIC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Original Assignee
Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS filed Critical Kirpart Otomotiv Parcalari Sanayi ve Ticaret AS
Publication of EP3612907A2 publication Critical patent/EP3612907A2/fr
Publication of EP3612907A4 publication Critical patent/EP3612907A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
    • F03G7/06112—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using the thermal expansion or contraction of enclosed fluids
    • F03G7/06113—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using the thermal expansion or contraction of enclosed fluids the fluids subjected to phase change

Definitions

  • the invention relates to a diaphragm with increased pressure resistance for use in actuators of thermostats used in the internal combustion engines cooling systems and an actuator formed thereby.
  • the invention relates to a new diaphragm configuration with high pressure resistance developed to prevent wax leaks at high pressures depending on the raise in temperature at the rivet points between the diaphragm and the heat conductive chamber, of closed embodiment of thermo-actuator inside the key element in the engine coolers of motor vehicles and an actuator formed with this diaphragm.
  • the coolant liquid that takes up the heat of the engine is moved to capillary wings of radiator through the channels to be cooled by the effect of the wind and fan, and then sent to the engine channels. Until the temperature of the coolant liquid increases, circulation of the liquid in the engine channels continues. When the temperature of the coolant liquid reaches a certain height values again, the process starts from the beginning.
  • the thermostat operates as a sensor that directs/conducts/canalizes this process depending on the temperature of the coolant liquid, sending it to the capillary channels of radiator in order to be cooled when the coolant temperature rises too much, to engine channels in order to absorb the rising temperature of engine when the coolant temperature decrease too much.
  • Thermostat is a control tool that keeps the system temperature in the range of desired values due to the heat and pressure sensitivity of the closed and flexible volumetric hydraulic structures located inside.
  • T hermostats with thermo-hydraulic actuators are used in engine cooling radiators of vehicles in order to maintain the optimum working temperature of engines.
  • thermo-actuator In the known state of the art; the ability to sense temperature changes in coolant and to direct this liquid coolant accordingly is due to the precise balance provided in the thermo-actuator inside the thermostats.
  • the superheating coolant liquid that comes from the engine absorbed the excess heat of engine causes temperature raise and relatively pressure raise in hydraulic fluid (wax) inside metal container, so the cylindrical hollow projection in contact with the hydraulic fluid collapse in itself, causing the shaft placed tightly into inner surface of diaphragm projection to move outward.
  • the cooled coolant liquid that comes from radiator provides the temperature fall, therefore the pressure fall of the hydraulic liquid, allowing the cylindrical hollow projection to return to its original form so causing the shaft to be retracted.
  • the ability of the piston portion of the thermo-actuator to continue to move back and forth is dependent on the preservation of the amount and the pressure of hydraulic fluid in the hydraulic reservoir of the inner embodiment of thermo-actuator.
  • the hydraulic fluid in the hydraulic container which reaches very high temperature values when the engine is extremely hot as a result of overload, leads to hydraulic fluid leaks separates the area where the flexible diaphragm and fixed metal shell are riveted each other to form the hydraulic container known in the art.
  • the internal structure of the thermostat actuators is designed to be suitable for operation at high pressures, the extreme wax pressures in the event of motor overheating result in unwanted wax leaks at joints where the metal container and flexible diaphragm structure which are firmly riveted to each other to prevent leakage outside to maintain the actuator to respond thermally responsive.
  • the rubber diaphragm clamped between the reservoir usually made of brass of a certain thickness and its upper lid and also the flange guiding the piston, also prevents leakage of the hydraulic fluid out of the reservoir.
  • an annularly surrounding sealing lip or cavity which is formed in the inner surface of the ring surface of reservoir where the diaphragm is clamped. T his structure is called v-shaped sealing groove (v-shaped sealing groove).
  • the patent document US 5083705 mentions a vax-pellet thermostat construction.
  • a frame having a valve seat, a piston fixed to the frame, a guide member mounted on sliding shaft and a valve fixed to the guide member.
  • An elastic ring seal is secured to the outer portion of the primary valve.
  • a ring groove is formed on the sealing member to form an annular elastic lip on the outside of the sealing member. T his elastic lip and the inner wall of frame are interlocked each other.
  • the patent document US 2700561 is the first document mentioning ring seal in the form of X. It has been improved as a more efficient solution then O-ring seal especially when parts move relative to one another, and where sealing of a shaft is required.
  • the X-ring element between the shaft (or valve rod) and the bearing surface provides a sealing superiority to the other construction. Although it exhibits a minimum of friction resistance, it maintains its sealing function at the highest level.
  • the diaphragm structure that can prevent the leakage due to sudden and temporary extreme high pressures that may occur in the internal hydraulic system of the thermo-actuator inside the thermostat is not offered in the known state of the art, and this leads to the invention of the diaphragm structure which guarantees waterproofness under extreme high pressure (like 400 and 500 pa).
  • an object of the invention is to put a diaphragm structure stretching with the pressure exerted by the wax and preventing leakage at high pressures and an actuator configured with this diaphragm.
  • Another object of the invention is put a lip structure which consists of indent and protrusion structures where the area between reservoir contact surface and diaphragm outer surface that contact hydraulic fluid, to increase the pressure resistance where diaphragm is clamped between the reservoir and flange to maintain sealing.
  • F igure 1 a shows a sectional view depicting the diaphragm structure of the invention.
  • F igure 1 b shows a front view of the diaphragm structure of the invention.
  • FIG . 2a shows a cross-sectional view of an entire thermo-actuator inner structure, including the diaphragm structure of the invention, and the lip structure in the diaphragm is indicated.
  • FIG . 2b shows a close-up view of the lip structure developed in the diaphragm structure of the invention.
  • F igure 3 shows an exploded perspective view showing parts of a thermo-actuator with the diaphragm structure of the invention.
  • F ig. 4 is a sectional view depicting the diaphragm structure of the prior art.
  • F igure 5 is a cross-sectional view of the inner structure of an actuator including a diaphragm according to the prior art.
  • the present invention relates to a diaphragm (30) which generates the hydraulic system within actuators (10) of thermostats in the cooling system of the internal combustion engines, allows said actuator (10) to perform its normal function without leaking up the wax (50) located between said reservoir (20) and said diaphragm (30) by tightly riveting these structure each other, ensures the sealing of heat-sensitive fixed metal reservoir (20) also under high pressures resulted from the wax (50) in the situations where engine overheats and relates to an actuator (10) formed thereby.
  • the actuator (10) comprising the present diaphragm (30) is used in the thermostats within the cooling systems of the internal combustion engines.
  • said diaphragm (30) is used here in an actuator (10), it can be used in all applications where it is required heat-sensitive control and where it is expected that sealing is maintained/conserved againstthe high pressure within the reservoir (20).
  • the hydraulic system s sealing structure which is formed by that the rubber is riveted with a flange (60) inserted on it as allowing the rubber within the junction locations to remain between diaphragm (30) and the metal reservoir (20) (heat permeable container) to prevent leakage and also, by clinching the flange compression extension (24) of metal reservoir (20) on them to make the sealing structure more secure, has certain restrictions too.
  • a solution consists of an annular groove formed on the reservoir (20) and a v-groove structure of diaphragm (30) created at this region during assembly by filling the said annular groove as a result of compression of diaphragm (30) between flange (60) and reservoir (20) is seen in figure 5.
  • high wax (50) pressure is applied onto the compression area where there are reservoir (20), flange (60) and the diaphragm (30) that is compressed between the reservoir (20) and the flange (60), the wax (50) leakage/progression can occur between the diaphragm (30) and the reservoir (20) wall until the v- groove region.
  • the pressure resistance can be higher in this region than other portions.
  • a v-groove cannot be formed on the diaphragm (30) compression area of reservoir (20) because of that reservoir thickness is reduced or the reservoir is made thinner or made from another material.
  • the wax (50) pressure resistance of the actuator (10) without v- groove structure significantly reduces if additional measures cannot be taken.
  • the present invention also provides an alternative solution to increase the pressure resistance in these situations.
  • the riveting method that ensures the sealing of the hydraulic system that forms the internal structure of the thermostat which is the main element of the engine cooling systems, in another word, the compression of the diaphragm (30) between the reservoir (20) and the flange (60), can provide sealing until a certain pressure.
  • leakage cannot be avoided at high pressures. T he wax (50) reaching high pressures begins to leak from the rivet regions.
  • Adding a lip (32) protrusion in front of the rivet region of diaphragm (30) as an additional protection to the riveting method to ensure the seal performance at higher pressures generates a situation trying to close the rivet region while trying to open it on the other side as a result of that the wax (50) pressuring on the rivet region to leak out also pressurizes onto the lip (32) walls at the same high pressure.
  • a high-quality safety wall can be formed against the wax (50) leakage at high pressures.
  • the actuator (10) seen in figure 2a transforms the heat change within the thermostat into a mechanical change.
  • T he actuator (10) comprises a heat conductive reservoir (20), a wax (50) which causes pressure increasement within said reservoir (20) by expanding in a heat-sensitive manner within said reservoir (20), a diaphragm (30) which stretches under the pressure exerted by said wax (50), a flange (60) which completes the sealing structure by squeezing said diaphragm (20) onto the reservoir (20) orifice, a piston (40) which settles on said diaphragm by being guided through said flange (60).
  • the present novel diaphragm (30) seen in figure 1 a has a ring-shaped lip (32) as centering the piston axis towards the diaphragm (30) portion which contacts with the wax (50) in the reservoir (20) and which is close to reservoir (20) wall.
  • T he lip (32) structure takes the lip-shape by a recess (31 ) near the reservoir contact surface (33) on the lower outer surface (36) of diaphragm (30) and a protrusion extending outwardly at a certain angle.
  • the lip (32) is structured as close to the clamping extension (34) where sealing is provided by compressing the diaphragm (30) between reservoir (20) and flange (60).
  • T he difference from the prior art generates a structure which prevents leakages at temporary wax (50) pressures by riveting reservoir (20) and flexible rubber diaphragm (30) (which generate inner hydraulic system of actuators (10) that often have to work under the high temporary wax (50) pressures) each other by compressing the clamping extension (34) of diaphragm (30) skirt between the reservoir (20) mouth and the flange (60) inserted on the diaphragm (30) with the permanent pressure value which is not exceed the value that causes the clamping extension (34) of the diaphragm (30) skirt to fail.
  • the pressure resistance of the diaphragm (30) consequently the pressure resistance of the construction which consists of the reservoir (20), the flange (60) and the diaphragm (30) is increased by means of the diaphragm (30) lip (32) structured in the region closed to the sealing region where the clamping extension (34) of the diaphragm (30) is compressed between the reservoir (20) and the flange (60).
  • T he sealing abilities of the region where diaphragm (30) clamping extension (34) locates have been improved thanks to the distribution of the wax pressure forces (when simultaneously exposed to very high hydraulic fluid pressures) on the rivet regions between the reservoir (20) and diaphragm (30) skirt and on the walls of the lip (32) of diaphragm (30).
  • F igure 2b shows a closed cross-sectional view of the present inventive diaphragm (30) structure within an actuator (10) with the other elements of the actuator (10).
  • T he present diaphragm (30) can easily be used to increase the sealing quality in many embodiments of the same construction.
  • the diaphragm (30) essentially comprises a piston guide hole (37) allowing movement of the piston (40) through and a lower inner surface (38) which is the initial starting region for the piston (40) to move upwardly through the piston guide groove (37).
  • the diaphragm (30) includes a reservoir contact surface (33) located in the space formed for itself on the reservoir (20) and a flange contact surface (35) on the other side where the flange (60) settles.
  • S aid reservoir contact surface (33) and flange contact surface (35) form a clamping extension (34) on the outside of the diaphragm (30) and, a compression is applied onto said clamping extension (34) by depending on the quantity and material of diaphragm (30) used between the reservoir (20) and flange (60).
  • Diaphragm s (30) outer surface (36) which is in contact with the wax (50) within the reservoir (20) has a smooth surface that extends downwardly depending on the shape of the piston (40) and ends in either a full or partial hemisphere.
  • the circled area in figure 2b shows the region where the sealing is provided by riveting the diaphragm (30) between the reservoir (20) and the flange (60) and, also the lip (32) structure where pressure resistance is increased.
  • T he lip (32) formed in this region of the diaphragm (30) is structured by a recess (31 ) and a protrusion between the reservoir contact surface (33) and the diaphragm s (30) outer surface which is in contact with the wax (50).
  • T he outer surface of the diaphragm (30) after the extreme end of the lip (32) is in contact with the inner surface of the reservoir (20), especially with the first twist (21 ) of the reservoir (20) mouth.
  • T his contactgets weaken at high pressures.
  • the reservoir (20) has an outwardly expanding volume in its mouth portion for allowing the diaphragm (30) to be locked by compressed between the reservoir (20) and the flange (60) and for allowing sealing therefor.
  • the reservoir (20) mouth extends outward after first twist (21 ) until the second twist (22), then extends upwardly up with a certain height where the flange (60) can be tightly settles therefor, and lastly a flange compression extension (24) is formed with an inward third bend (23).
  • S aid flange (60) spreads outwardly with a hole guiding the piston (40) in the middle of said flange (60) and a compression edge (61 ) to compress the diaphragm (30) onto the reservoir (20). It is allowed that the diaphragm (30) is compressed between the reservoir (20) and the flange (60) by riveting it as a result of bending of flange (60) compression edge (61 ) onto flange compression extension (24).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Diaphragms And Bellows (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

Dans un actionneur (10) qui comprend un réservoir (20), un piston (40), une bride (60), qui est fixée au réservoir (20) et qui guide le piston (40), et une cire (50) qui provoque une augmentation de la pression dans le réservoir (20) par expansion à l'intérieur de celui-ci de manière sensible à la chaleur, qui transforme le changement de température dans un thermostat en un changement mécanique; la présente invention concerne un diaphragme (30) qui actionne mécaniquement le piston (40) par flexion avec la pression exercée par la cire (50). Afin d'augmenter la résistance de pression de la zone où l'étanchéité est assurée par compression du diaphragme (30), entre le réservoir (20) et la bride (60), le présent diaphragme (30) comprend une structure de lèvre (32) qui est formée par un évidement (31) et une saillie entre la surface de contact du réservoir (33) et la surface extérieure du diaphragme (30) en contact avec la cire (50).
EP18847747.5A 2017-05-29 2018-05-29 Actionneur avec diaphragme à résistance de pression augmentée Withdrawn EP3612907A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201707791 2017-05-29
PCT/TR2018/050273 WO2019040029A2 (fr) 2017-05-29 2018-05-29 Actionneur avec diaphragme à résistance de pression augmentée

Publications (2)

Publication Number Publication Date
EP3612907A2 true EP3612907A2 (fr) 2020-02-26
EP3612907A4 EP3612907A4 (fr) 2021-04-14

Family

ID=65440127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18847747.5A Withdrawn EP3612907A4 (fr) 2017-05-29 2018-05-29 Actionneur avec diaphragme à résistance de pression augmentée

Country Status (3)

Country Link
EP (1) EP3612907A4 (fr)
CN (1) CN110622094A (fr)
WO (1) WO2019040029A2 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1199556A (fr) * 1958-03-04 1959-12-15 Dispositif d'actionnement perfectionné
US3180150A (en) * 1960-08-01 1965-04-27 Watts Regulator Co Thermostat
JPS6161953A (ja) * 1984-09-03 1986-03-29 Fuji Thomson Kk ワツクス式熱応動伸縮装置
CA1284793C (fr) * 1986-06-12 1991-06-11 Yoshikazu Kuze Thermostat a pastille de cire
JP2512313B2 (ja) * 1987-11-24 1996-07-03 義一 久世 サ―モ・アクチュエ―タ
US5971288A (en) * 1997-04-22 1999-10-26 Standard-Thomson Corporation Expansion composition
JP4293506B2 (ja) * 2002-11-27 2009-07-08 日本サーモスタット株式会社 サーモエレメント
GB201002503D0 (en) * 2010-02-15 2010-03-31 Nat Oilwell Varco Uk Ltd Actuator valve and method
BRPI1005376B1 (pt) * 2010-11-08 2021-08-03 Kirpart Otomotiv Parçalari Sanayi Ve Ticaret A.S. Montagem de termostato de rápida resposta
CN202991375U (zh) * 2012-07-31 2013-06-12 科派特汽车配件工贸联合股份公司 用于系统的冷却剂循环的热致动器组件

Also Published As

Publication number Publication date
WO2019040029A2 (fr) 2019-02-28
WO2019040029A3 (fr) 2019-05-23
CN110622094A (zh) 2019-12-27
EP3612907A4 (fr) 2021-04-14

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