JP7445968B2 - Fluid containment assembly and method for manufacturing the same - Google Patents

Description

The present invention relates to a fluid enclosure assembly, and particularly to a joining structure of members in an apparatus including a fluid enclosure, such as a diaphragm device that drives an expansion valve or a pulsation damper that absorbs pulsation of a fuel pump.

A refrigeration cycle device such as a car air conditioner is equipped with an expansion valve in order to fully utilize the capacity of an evaporator. This expansion valve throttles the flow of refrigerant supplied to the evaporator in response to the refrigerant temperature in the outlet side piping of the evaporator and controls the flow to the optimum flow rate.A diaphragm is used to operate the valve body that adjusts the flow rate of refrigerant. equipment is provided.

As shown in FIG. 5 (see FIG. 2 for the entire expansion valve), this diaphragm device includes a dish-shaped member 12 having an opening 15 in the center and fixed to the upper surface of the valve body 32, and a dish-shaped member 12 fixed to the upper surface of the valve body 32. A diaphragm 14 is sandwiched between the dish-like member 12 and the lid-like member 13. This is a gas-filled chamber 21. Further, the upper end of the actuating rod 36 is connected to the lower surface of the diaphragm 14 via the actuating rod receiving member 23, and the lower end of the actuating rod 36 is in contact with the valve body 35.

On the other hand, the internal space below the device 81 with the diaphragm 14 in between is a refrigerant introduction chamber 22 that communicates with the return passage 43 through the opening 15 in the center of the dish-shaped member 12 described above. The return passage 43 is a passage through which the refrigerant discharged from the evaporator 54 passes, and adjusts the pressure and pressure of the working gas in the working gas filling chamber 21 according to the temperature and pressure of the refrigerant flowing from the return passage 43 into the refrigerant introduction chamber 22. Volume changes.

Then, when the pressure of the working gas in the working gas filling chamber 21 decreases, the diaphragm 14 is pulled upward according to the difference between the pressure in the refrigerant introduction chamber 22, and the working rod 36 follows the diaphragm 14 and moves upward. As a result, the valve body 35 advances toward the valve seat 34 and the refrigerant flow rate is throttled. Conversely, when the pressure of the working gas increases, the diaphragm 14 is pushed down according to the difference in pressure from the refrigerant introduction chamber 22, and the actuation rod 36 follows the diaphragm 14 and moves downward, causing the valve body 35 to move downward. is retreated from the valve seat 34, and the refrigerant flow rate increases. In this manner, in the expansion valve 31, the amount of refrigerant supplied from the expansion valve 31 to the evaporator 54 is adjusted in accordance with the temperature and pressure of the refrigerant returned from the evaporator 54 to the expansion valve 31.

In manufacturing the diaphragm device 81, the peripheral edge (flange) 12b of the dish-shaped member 12 and the peripheral edge (flange) 13b of the lid-shaped member 13 are overlapped so as to sandwich the diaphragm 14, and these are welded (for example, , TIG welding) to seal the working gas from the working gas filling chamber 21 and the refrigerant from the refrigerant introduction chamber 22 from leaking to the outside. Note that gas is filled into the working gas filling chamber 21 through an opening 16 provided on the top surface of the lid-like member 13, and the opening 16 is closed with a plug 17.

Furthermore, Patent Document 1 listed below discloses an expansion valve equipped with such a diaphragm device.

JP2019-11885A

By the way, in such a diaphragm device, the flange portions 12b and 13b are welded in order to stack and join the dish-shaped member 12, diaphragm 14, and lid-shaped member 13 in this order. Here, the diaphragm 14 sandwiched between the dish-shaped member 12 and the lid-shaped member 13 is affected by heat during welding, so that the portion sandwiched between the flanges 12b and 13b (i.e., the outer peripheral portion of the diaphragm) Hardness decreases. In order to set the fulcrum position of the movable part while avoiding the part where this hardness decrease occurs, it is necessary to provide an allowance for the width dimension of the flange parts 12b and 13b. Therefore, in the conventional joining structure, the outer diameter D of the diaphragm device 81 has to be large, leaving room for improvement from the viewpoint of meeting the demand for downsizing of the expansion valve.

On the other hand, if there is no need to provide the above-mentioned margin in consideration of thermal effects, the effective diameter of the diaphragm (the diameter of the movable part that moves up and down due to the phase change of the working gas, excluding the part held between the flanges) ) De can also be expanded.

Furthermore, the pulsation damper that absorbs the pulsation of the fuel pump also has a structure common to the diaphragm device described above, and has similar problems.

In other words, the pulsation damper also has a diaphragm (a damper in which two diaphragms are shaped like a bag and a fluid is sealed inside) sandwiched between a dish-like member made of a metal plate and a lid-like member. In the conventional structure in which the flange portions were similarly welded together, the outer diameter had to be increased by an allowance to account for the thermal effects during welding.

Therefore, an object of the present invention is to eliminate the need to provide a margin in consideration of thermal effects during joining of members in a fluid enclosure assembly including a fluid enclosure.

In order to solve the above-mentioned problem and achieve the object, a fluid enclosure assembly according to the present invention includes a dish-shaped member formed of a metal plate, and a dish-shaped member formed of a metal plate and joined to the dish-shaped member. A member main body that includes a lid-like member capable of forming an internal space therebetween, and a diaphragm disposed between the dish-like member and the lid-like member, wherein the dish-like member and the lid-like member both form the internal space. and a flange portion extending outward from the periphery of the member main body portion to enable said joining, and the diaphragm has a flange portion whose periphery portion is held between the flange portion of the dish-shaped member and the flange portion of the lid-shaped member. A fluid sealing assembly is provided that is joined to a dish-like member and a lid-like member so as to be connected to each other, and a fluid-sealing space for sealing a fluid is formed between a member body of the lid-like member and a diaphragm . The shaped member does not have a fluid inlet for filling the fluid sealed space with fluid, the fluid sealed space is filled with fluid, and the diaphragm is supported between the dish shaped member and the lid shaped member, and the fluid sealed space is filled with fluid. In order to seal the space, the flange portion of the dish-shaped member, the peripheral edge portion of the diaphragm, and the flange portion of the lid-shaped member are overlapped and joined by being rolled and tightened into a roll shape.

In the fluid-filled assembly of the present invention, the dish-like member and the lid-like member are joined so that the diaphragm is sandwiched between the dish-like member and the lid-like member, as in the conventional structure, but welding is not performed for joining. In other words, by sandwiching the peripheral edge of the diaphragm between the flange of the dish-shaped member and the flange of the lid-shaped member, these parts (the flange of the dish-shaped member, the peripheral edge of the diaphragm, and the lid-shaped member) are tightened. Joining is performed by rolling the flange portions of the members into a roll and pressing the members together. Note that in order to improve sealing performance, a sealing material may be interposed between the flange portion of the lid-like member and the diaphragm.

According to the present invention, the joint portions (flange portions of the dish-shaped member and the lid-shaped member) are not affected by heat, and the dimensional margin in consideration of thermal effects is Since it is no longer necessary to provide a diaphragm device, the outer diameter of the diaphragm device can be made smaller than in the past. Furthermore, since the tightened portion is rolled into a roll, the outer diameter can be made smaller by rounding the peripheral edge compared to a structure in which horizontally spread flange portions are simply overlapped and joined.

Also, to describe the advantage of the present invention from a different perspective, there is no need to consider the heat affected zone, so the effective diameter of the diaphragm (the diameter of the part arranged in the internal space that moves up and down due to the phase change of the working gas) It becomes possible to increase the

In the present invention, the lid-like member does not have a fluid inlet for filling the fluid sealing space with fluid.

Further , in the present invention, the fluid sealed space is filled with fluid. That is, the above-described joining process by seaming is performed in the fluid filling the fluid-filled space . This makes it possible to fill the fluid sealing space (between the dish-shaped member and the diaphragm) with the fluid without performing a separate fluid sealing process. Note that the "fluid" referred to in the present invention may be either gas or liquid.

As described above, in the present invention, the assembly (joining) of the members and the sealing of the fluid into the fluid sealing space are performed in one step, so the number of manufacturing steps can be reduced. In particular, even if a flammable or thermally sensitive fluid is used to fill the device, the present invention does not involve the use of fire or high-temperature work such as welding, so the parts can be The bonding work and the fluid sealing work can be performed at the same time. In addition, since it does not have a fluid inlet, it is possible to eliminate the work of blocking the fluid inlet after filling the fluid (for example, the work of attaching and welding a plug to close the fluid inlet), which improves the manufacturing efficiency of the device. I can do it. Further, the method for manufacturing a fluid-filled assembly according to the present invention relates to such a manufacturing process, and includes a step of preparing a dish-like member, a lid-like member, and a diaphragm, and a step of assembling the diaphragm with the dish-like member and the lid-like member. a joining step of joining the flange portion of the dish-shaped member, the peripheral edge of the diaphragm, and the flange portion of the lid-shaped member by overlapping them and tightening them into a roll shape so as to support them in between and seal the fluid-filled space; , the bonding step is performed in a fluid filling the fluid-filled space (for example, in a gas atmosphere filling the fluid-filled space).

The fluid containment assembly according to the present invention, in one typical aspect, is a diaphragm device that actuates an expansion valve. In the diaphragm device, the fluid sealed in the fluid sealed space is a working gas that operates the expansion valve, and the dish-shaped member fills the internal space on the lower surface side of the diaphragm with the refrigerant discharged from the evaporator. It has a communication port that communicates with the return flow path of the expansion valve through which it passes.

Further, the expansion valve according to the present invention includes a valve body having a valve chamber communicating with an inflow path for introducing refrigerant and an outflow path for discharging the refrigerant, and a valve body in a closed state seated on a valve seat and an open state spaced from the valve seat. a valve body that changes the flow rate of refrigerant by moving forward and backward with respect to the valve seat; a biasing member that biases the valve body toward the valve seat; and a biasing member that extends vertically inside the valve body. An operating rod whose lower end contacts the valve body and moves the valve body in the valve opening direction against the biasing force of the biasing member; An expansion valve comprising: a drive part to which the valve body is connected to drive the actuating rod; and a return passage that passes through the upper part of the valve body in the horizontal direction to allow refrigerant to pass therethrough and communicates with the lower surface of the drive part, The drive unit includes the fluid sealing assembly (diaphragm device) according to the typical aspect.

Meanwhile, in another exemplary aspect of the invention, the fluid containment assembly is a pulsation damper. This pulsation bumper includes a dish-shaped member formed of a metal plate, a lid-shaped member formed of a metal plate and capable of forming an internal space between the dish-shaped member by being joined to the plate-shaped member, and a peripheral portion. A fluid-filled space formed between two stacked diaphragms is filled with fluid, and a diaphragm damper is provided within the internal space.

Both the dish-shaped member and the lid-shaped member have a member body portion that forms the internal space, and a flange portion that protrudes outward from the periphery of the member body portion to enable the joining, and the two The peripheral edges of the two diaphragms are joined to the dish-shaped member and the lid-shaped member so as to be sandwiched between the flange part of the dish-shaped member and the flange part of the lid-shaped member, and the diaphragm damper is supported in the internal space and In order to seal the fluid enclosed space, the flange portion of the dish-shaped member, the peripheral edge portions of the two diaphragms, and the flange portion of the lid-shaped member are overlapped and joined by being rolled and tightened. There is . Further , in order to improve sealing performance, a sealing material is interposed between the peripheral edges of the two diaphragms.

According to the present invention, since there is no need to consider thermal effects during joining of members in such a pulsation damper, it is possible to reduce the outer diameter of the device. Furthermore, it is also possible to construct a pulsation damper in which the effective diameter of the diaphragm damper (the diameter of the portion that functions as a damper) is larger than that of the conventional diaphragm damper, even though the outer diameter of the device is the same or smaller.

According to the fluid-sealing assembly according to the present invention, it is possible to eliminate the need to provide a margin in consideration of thermal effects during joining of members in a fluid-sealing assembly equipped with a fluid-sealing portion, and the outer diameter of the device can be reduced. It becomes possible to reduce the diameter of the diaphragm or increase the effective diameter of the diaphragm.

Other objects, features, and advantages of the present invention will become clear from the following description of embodiments of the present invention based on the drawings. Note that in each figure, the same reference numerals indicate the same or corresponding parts.

FIG. 1 is a vertical sectional view showing a fluid containment assembly (diaphragm device) according to a first embodiment of the present invention. FIG. 2 is a vertical sectional view showing an expansion valve equipped with a fluid sealing assembly (diaphragm device) according to the first embodiment. FIG. 3 is a vertical cross-sectional view of a fluid containment assembly (diaphragm device) according to a second embodiment of the invention. FIG. 4 is a vertical sectional view showing a fluid containment assembly (pulsation damper) according to a third embodiment of the present invention. FIG. 5 is a vertical cross-sectional view showing a conventional fluid containment assembly (diaphragm device) included in an expansion valve.

[First embodiment]
As shown in FIGS. 1 and 2, the fluid enclosure assembly 11 according to the first embodiment of the present invention is a diaphragm device provided in an expansion valve 31, and has an opening (refrigerant inlet to be described later) 15 in the center. A dish-like member 12 fixed to the upper surface of the valve body 32, a lid-like member 13 covering the upper surface of the dish-like member 12, and a diaphragm 14 disposed between the dish-like member 12 and the lid-like member 13. have Note that FIG. 2 shows two-dimensional orthogonal coordinates representing up, down, left, and right directions, and the following description will be based on these directions.

Both the dish-shaped member 12 and the lid-shaped member 13 are formed of metal plates, and have member main bodies 12a and 13a that form a space (a working gas filling chamber 21 or a refrigerant introduction chamber 22, which will be described later) with the diaphragm 14; It has flange portions 12b, 13b that extend outward from the periphery of the member body portions 12a, 13a. Then, the flange portions 12b, 13b of both members 12, 13 are overlapped with the peripheral edge of the diaphragm 14 being sandwiched between the flange portions 12b, 13b of both members 12, 13, and these flange portions 12b, 13b are attached to the device 11. The diaphragm 14 is joined by being rolled together with the peripheral edge of the diaphragm 14 over the entire circumference (rolled into a roll and brought into close contact with each other).

In addition, in order to improve the sealing performance of the joint 10 by the tightening, the sealing between the flange 13b of the lid-like member 13 and the periphery of the diaphragm 14, as well as between the flange 12b of the dish-shaped member 12 and the periphery of the diaphragm 14 is A powder or sheet-like sealing material (not shown) may be interposed between the two.

By joining each member 12, 13, and 14 in this way, a working gas filling chamber (fluid filling space) 21 capable of filling a working gas is formed between the lid-like member 13 and the diaphragm 14, and a working gas filling chamber (fluid filling space) 21 is formed between the lid-like member 13 and the diaphragm A refrigerant introduction chamber 22 into which a refrigerant can be introduced can be formed between and the plate-shaped member 12, respectively.

Note that the upper surface of the lid-like member 13 is provided with a working gas inlet (fluid inlet) 16 that allows gas to be injected into the working gas filling chamber 21, and a plug 17 that closes the inlet 16 after gas is injected. Be prepared. Furthermore, a refrigerant inlet 15 is formed on the lower surface of the dish-shaped member 12 to communicate with the return flow path 43 of the expansion valve 31 and to allow refrigerant to be introduced into the refrigerant introduction chamber 22 .

In this embodiment, since the members 12 to 14 are joined by seaming, the outer diameter D1 of the device 11 can be made smaller than the outer diameter D of the conventional device 81 (see FIG. 5). It becomes possible to downsize the. Conversely, if the device outer diameter D is set close to the outer diameter D of the conventional device 81, the effective diameter De1 of the diaphragm 14 can be made larger than the effective diameter De of the conventional device 81.

The operation of the expansion valve 31 driven by the diaphragm device 11 of this embodiment is the same as the conventional one, and since it has already been explained in the background art section, the details will be omitted, but it will be briefly described with reference to FIG. 2. , the pressure of the working gas in the working gas filling chamber 21 is determined according to the temperature and pressure of the refrigerant introduced into the refrigerant introduction chamber 22 through the return passage 43 through which the refrigerant discharged from the evaporator 54 is passed and sent to the compressor 52. As the volume changes and the diaphragm 14 moves up and down, the actuation rod 36 connected to the diaphragm 14 via the actuation rod receiving member 23 moves the valve body 35 up and down.

This adjusts the flow rate of the refrigerant that flows into the valve chamber 33 from the condenser (condenser) 53 through the inflow path 41, passes between the valve body 35 and the valve seat 34, and is supplied from the outflow path 42 to the evaporator 54. be done. The valve body 35 is urged upward via a valve body support member 38 by a coil spring 37 provided in the valve chamber 33, and the actuating rod 36 resists this urging force and pushes the valve body 35 downward. Move to. Furthermore, when the actuating rod 36 moves upward, the valve body 35 moves upward due to the biasing force of the coil spring 37. In the expansion valve 31 shown in FIG. 2, an O-ring is attached to the insertion hole through which the actuating rod 36 is inserted to ensure airtightness between the vicinity of the outflow passage 42 and the vicinity of the return passage 43. There is. Furthermore, a ring-shaped vibration isolating spring may be attached to this portion to suppress vibrations received by the actuating rod 36 from the valve body 35 through sliding resistance.

[Second embodiment]
FIG. 3 shows a diaphragm device 61 according to a second embodiment of the invention. In this embodiment, gas is injected into the working gas filling chamber 21 at the same time as the flange parts 12b and 13b are joined, and the flange parts 12b and 13b are tightened in the same way as in the first embodiment. By carrying out the work in an atmosphere of working gas, it is possible to fill the working gas filling chamber 21 with gas at the same time as tightening.

Therefore, in this embodiment, the working gas inlet 16 and the plug 17 provided on the upper surface of the lid-like member 13 in the first embodiment are unnecessary, and the work of attaching and welding the plug 17 to the inlet 16 is also unnecessary. It becomes possible to reduce the number of manufacturing steps for the diaphragm device.

[Third embodiment]
A fluid containment assembly according to a third embodiment of the present invention is a pulsation damper included in a fuel pump. As shown in FIG. 4, this pulsation damper 71 consists of a damper body 74 which is formed into a bag by welding the peripheral edges (flanges) of two thin metal plates (diaphragms) 74c and 74d together while filling the inside with gas. and a disc-shaped case body 75 consisting of a dish-shaped member 72 and a lid-shaped member 73 for accommodating the damper main body 74.

Note that both the dish-like member 72 and the lid-like member 73 are formed of metal plates, and have member main bodies 72a and 73a that form an internal space that accommodates the damper main body 74, and an outer space from the periphery of the member main bodies 72a and 73a. It has flange portions 72b and 73b that widen toward the outside. Further, the case body 75 has an opening 76 and a communication port 77 with the pressurizing chamber to allow the damper body 74 to exhibit the pulsation reducing effect by allowing fuel to enter and exit the internal space of the case body 75.

In order to join the case body 75 and the damper body 74 and arrange the damper body 74 inside the case body 75, the flange of the dish-shaped member 72 and the lid-shaped member 73 is This is done by overlapping the parts 72b, 73b with the flange part of the damper main body 74 in between, and then wrapping the flange parts 72b, 73b around the entire circumference.

Regarding such a pulsation damper 71, the flange portions 72b and 73b are joined together (the dish-like member 72, the lid-like member 73, and the damper body 74 are joined together) by seaming rather than welding, thereby reducing the external appearance of the entire device. The diameter can be reduced, making it possible to meet the demand for downsizing of fuel pumps.

Although the embodiments of the present invention have been described above, it is clear to those skilled in the art that the present invention is not limited to these and that various changes can be made within the scope of the claims. .

For example, in the above embodiment, the present invention is applied to a diaphragm device included in an expansion valve and a pulsation damper that absorbs pulsation of a fuel pump, but the present invention can be applied to other devices having a similar structure. It is possible.

10 Joint part 11, 61, 81 Fluid sealing assembly (diaphragm device)
12, 72 Dish-shaped member 12a, 13a, 72a, 73a Member main body portion 12b, 13b, 72b, 73b Flange portion 13, 73 Lid-shaped member 14, 74c, 74d Diaphragm 15 Refrigerant inlet 16 Working gas inlet 17 Plug 21 Operation Gas filling chamber 22 Refrigerant introduction chamber 23 Operating rod receiving member 31 Expansion valve 32 Valve body 33 Valve chamber 34 Valve seat 35 Valve body 36 Operating rod 37 Coil spring (biasing member)
38 Valve body support member 41 Inflow path 42 Outflow path 43 Return path 52 Compressor (compressor)
53 Condenser (condenser)
54 Evaporator
71 Fluid enclosure assembly (pulsation damper)
74 Damper body 75 Case body 76 Opening 77 Communication port

Claims (7)

A dish-shaped member formed of a metal plate,
a lid-shaped member formed of a metal plate and capable of forming an internal space between the plate-shaped member and the plate-shaped member;
a diaphragm disposed between the dish-shaped member and the lid-shaped member;
The dish-shaped member and the lid-shaped member both include:
a member main body portion forming the internal space;
a flange portion extending outward from the periphery of the member main body portion to enable the joining;
The diaphragm is joined to the dish-shaped member and the lid-shaped member such that a peripheral edge thereof is sandwiched between the flange part of the dish-shaped member and the flange part of the lid-shaped member,
A fluid-sealing assembly, wherein a fluid-sealing space for sealing a fluid is formed between the member main body of the lid-like member and the diaphragm,
The lid-like member does not have a fluid inlet for filling the fluid into the fluid enclosed space,
the fluid enclosed space is filled with the fluid;
In order to support the diaphragm between the dish-shaped member and the lid-shaped member and to seal the fluid-filled space, the flange part of the dish-shaped member, the peripheral edge of the diaphragm, and the lid-shaped member are connected to each other. The flange part is overlapped and joined by rolling it into a roll shape.
A fluid containment assembly characterized by: The fluid sealing assembly according to claim 1 , wherein a sealing material is interposed between the flange portion of the lid-like member and the diaphragm. the fluid containment assembly is a diaphragm device that actuates an expansion valve;
The fluid sealed in the fluid sealed space is a working gas that operates the expansion valve,
The fluid sealing according to claim 1 or 2 , wherein the dish-shaped member has a communication port that communicates the internal space on the lower surface side of the diaphragm with a return passage of the expansion valve through which refrigerant discharged from the evaporator passes. assembly. a valve body having a valve chamber communicating with an inflow path for introducing refrigerant and an outflow path for discharging the refrigerant;
a valve body that changes the flow rate of the refrigerant by moving forward and backward with respect to the valve seat between a closed state where the valve is seated on the valve seat and an open state where the valve is spaced from the valve seat;
a biasing member that biases the valve body toward the valve seat;
an actuating rod that is arranged to extend vertically inside the valve body, a lower end of which contacts the valve body and moves the valve body in the valve opening direction against the biasing force of the biasing member;
a drive unit provided on the upper surface of the valve body, connected to the upper end of the actuation rod, and configured to drive the actuation rod;
An expansion valve comprising: a return flow path that horizontally penetrates the upper part of the valve body to allow passage of refrigerant and communicates with the lower surface of the drive section,
An expansion valve comprising: the fluid enclosure assembly according to claim 3 as the drive section. A dish-shaped member formed of a metal plate,
a lid-shaped member formed of a metal plate and capable of forming an internal space between the plate-shaped member and the plate-shaped member;
A fluid-sealed space formed between two diaphragms whose peripheral portions are overlapped is filled with fluid, and a diaphragm damper disposed within the internal space,
The dish-shaped member and the lid-shaped member both include:
a member main body portion forming the internal space;
a flange portion extending outward from the periphery of the member main body portion to enable the joining;
The fluid sealing assembly is joined to the dish-like member and the lid-like member such that peripheral edges of the two diaphragms are sandwiched between the flange part of the dish-like member and the flange part of the lid-like member. hand,
The flange portion of the dish-shaped member, the peripheral edge portions of the two diaphragms, and the flange portion of the lid-shaped member are configured to support the diaphragm damper in the internal space and seal the fluid enclosed space. They are joined by being overlapped and rolled into a roll.
A sealing material is interposed between the peripheral edges of the two diaphragms.
A fluid containment assembly characterized by: A dish-shaped member formed of a metal plate,
a lid-shaped member formed of a metal plate and capable of forming an internal space between the plate-shaped member and the plate-shaped member;
a diaphragm disposed between the dish-shaped member and the lid-shaped member;
Equipped with
The dish-shaped member and the lid-shaped member both include:
a member main body portion forming the internal space;
a flange portion extending outward from the periphery of the member main body portion to enable the joining;
has
The diaphragm is joined to the dish-shaped member and the lid-shaped member such that a peripheral edge thereof is sandwiched between the flange part of the dish-shaped member and the flange part of the lid-shaped member,
A fluid-enclosed space for enclosing a fluid is formed between the member main body of the lid-like member and the diaphragm,
The lid-like member does not have a fluid inlet for filling the fluid into the fluid enclosed space,
The fluid enclosed space is filled with the fluid.
fluid containment assembly
A method of manufacturing,
preparing the dish-shaped member, the lid-shaped member, and the diaphragm;
In order to support the diaphragm between the dish-shaped member and the lid-shaped member and to seal the fluid-filled space, the flange part of the dish-shaped member, the peripheral edge of the diaphragm, and the lid-shaped member are connected to each other. A joining process in which the flange parts are joined by overlapping them and tightening them into a roll shape.
including;
performing the bonding step in the fluid;
A method of manufacturing a fluid-filled assembly, characterized in that: the fluid is a gas;
The bonding step is performed in the gas atmosphere.
A method of manufacturing a fluid containment assembly according to claim 6.

Images