WO2023080596A1

WO2023080596A1 - Elastic damper for controlling flow pulsation, manufacturing method therefor, and flow pulsation reduction method

Info

Publication number: WO2023080596A1
Application number: PCT/KR2022/016911
Authority: WO
Inventors: 박근환; 이상협
Original assignee: 가천대학교 산학협력단
Priority date: 2021-11-04
Filing date: 2022-11-01
Publication date: 2023-05-11

Abstract

An elastic damper for controlling flow pulsation comprises: a body part which has a spherical shape and has elasticity by being formed from an elastic body, and has a spherical space part formed therein; an entrance part which is connected to the body part and forms an inlet communicating with the space part; and an exit part which is connected to the body part and forms an outlet communicating with the space part.

Description

Flow pulsation control elastic damper, manufacturing method thereof, and flow pulsation reduction method

The present invention relates to a flow pulsation control elastic damper, a method for manufacturing the flow pulsation control elastic damper, and a method for reducing flow pulsation, and more particularly, to a flow pulsation control elastic damper for mitigating pulsation generated from a pump during fluid transport, the flow rate It relates to a manufacturing method of a pulsation control elastic damper and a flow pulsation reduction method using the flow pulsation control elastic damper.

Pumps are essentially used to transport fluids. In the case of a pump using a motor, pulsation occurs in the flow path due to the operating principle, and this pulsation may cause fatal defects in industries requiring precise fluid control such as fine chemicals and pharmaceuticals. Accordingly, dampers for reducing pulsation in various ways are being developed, but there is a limit to reducing pulsation.

On the other hand, in the case of a process sensitive to pulsation, efforts are made to eliminate pulsation itself by using a syringe pump, etc., but the structure of the syringe pump is disadvantageous to mass production, and the efficiency is lowered compared to the case of using a general motor pump.

Therefore, there has been a study on a flow pulsation reducing device for reducing pulsation while using an existing motor pump.

Therefore, the technical problem of the present invention is to provide a flow pulsation control elastic damper having a simple structure and a high pulsation mitigation rate.

Another object of the present invention is to provide a method for manufacturing the pulsation control elastic damper.

Another object of the present invention is to provide an elastic damper for controlling flow pulsation.

An elastic damper for controlling flow pulsation according to an embodiment for realizing the above object of the present invention forms an inner spherical space in a spherical shape, and has an elastic body formed of an elastic body and an inlet communicating with the space It forms an inlet connected to the body, and an outlet communicating with the space, and includes an outlet connected to the body.

In one embodiment of the present invention, the body portion may be formed using a silicone elastomer.

In one embodiment of the present invention, the volume of the body portion may change according to the pressure and volume of the fluid accommodated therein.

In one embodiment of the present invention, the change in volume of the body is three-dimensionally along a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to the first and second directions. It can be done.

In one embodiment of the present invention, the inlet and the outlet are each cylindrical, located in the opposite direction of the body and arranged on a straight line, according to the pressure and flow rate of the fluid flowing inside the body, the inlet The distance between the part and the outlet part can vary.

In one embodiment of the present invention, the flow pulsation control elastic damper may further include an inlet support for supporting the inlet and an outlet support for supporting the outlet. A distance between the inlet support part and the outlet support part may change according to a volume change of the body part.

A method for reducing flow pulsation according to an embodiment for realizing the object of the present invention described above is to reduce flow pulsation of a fluid transport system including a pump and a flow path connected to the pump, an elastic damper for controlling flow pulsation in the flow path to install The flow pulsation reduction method includes measuring the characteristics of the flow rate in the flow path of the fluid transport system, calculating the volume and thickness of the body portion of the flow pulsation control elastic damper using the measured characteristics of the flow rate, the An inner spherical space in a spherical shape corresponding to the calculated volume and thickness, the body part formed of an elastic body and having elasticity, an inlet part connected to the body part and forming an inlet communicating with the space part, and Forming an outlet communicating with the space and manufacturing a flow pulsation control elastic damper including an outlet connected to the body, and installing the flow pulsation control elastic damper in the flow path of the fluid transport system include

In one embodiment of the present invention, the calculating step may use the following Equation 1.

[Equation 1]

(Qin inlet flow rate, q0: constant flow rate, a0: magnitude of pulsation, sinwt, coswt: vibration function of pulsation, R: hydraulic resistance, k: expansion coefficient of body part)

In one embodiment of the present invention, the material, volume and thickness of the body can be calculated so that the coefficient of the sin term and the coefficient of the cos term are 0.

In one embodiment of the present invention, the theoretically calculated pressure and volume change of the body corresponds to a section in which the slope between the maximum pressure and the second pressure increase section is 0 in the theoretically calculated pressure-volume diagram of the body. It is possible to calculate the volume and thickness of the body portion so as to do so.

In one embodiment of the present invention, the pump of the fluid transport system may be a peristaltic pump including a motor.

A method of manufacturing a flow pulsation control damper according to an embodiment for realizing the object of the present invention described above includes disposing a lower mold having a hemispherical depression, an inlet groove, and an outlet groove, and forming elastic on the lower mold. Applying a material, disposing an inner mold on the lower mold to which the elastic material is applied, further applying an elastic material on the inner mold, and the inner mold and the lower mold to which the elastic material is applied. Disposing an upper mold having a hemispherical depression, an inlet groove, and an outlet groove formed thereon on a mold, curing the elastic material to form an elastic damper for controlling flow pulsation, and then placing the inner mold on the elastic damper for controlling flow pulsation and separating them to the outside using the elastic force of the damper.

In one embodiment of the present invention, the flow rate pulsation control damper forms an inner spherical space in a spherical shape, and forms an elastic body portion having elasticity and an inlet communicating with the space portion, the body portion It may include an inlet connected to the inlet, and an outlet connected to the space, and an outlet connected to the body.

According to one embodiment for realizing the above object of the present invention, a body portion forming an inner spherical space in a spherical shape, an inlet portion forming an inlet communicating with the space portion, and an inlet portion connected to the body portion, and A flow pulsation control elastic damper including an outlet port communicating with the space portion and an outlet portion connected to the body portion is manufactured. A method of manufacturing a flow pulsation control damper includes disposing a lower mold formed with a hemispherical depression, an inlet groove connected to the depression, and a cylindrical opening connected to the depression, the inlet groove of the lower mold, Filling the recess with an elastic material, disposing an inner mold having a shape corresponding to the space, the inlet and the outlet in the lower mold filled with the elastic material, the recess in which the inner mold is disposed disposing an upper mold within the portion and the cylindrical opening, curing the elastic material to form a flow pulsation control elastic damper, and then separating the inner mold to the outside using the elastic force of the flow pulsation control elastic damper. includes

According to embodiments of the present invention, the flow pulsation control elastic damper forms an inner spherical space in a spherical shape, and can effectively reduce pulsation by using a body portion formed of an elastic body and having elasticity.

However, the effects of the present invention are not limited to the above effects, and may be expanded in various ways without departing from the spirit and scope of the present invention.

1 is a view showing an elastic damper for controlling flow pulsation according to an embodiment of the present invention.

2 is a view showing a method of manufacturing an elastic damper for controlling flow pulsation according to an embodiment of the present invention.

3 is a view showing a method of manufacturing an elastic damper for controlling flow pulsation according to another embodiment of the present invention.

4 is a diagram illustrating a method for reducing flow pulsation using an elastic damper for controlling flow pulsation in a flow path according to an embodiment of the present invention.

FIG. 5(a) is a graph showing the stress-strain curve of a general linear rubber, and FIG. 5(b) is a graph showing the pressure-volume curve of a spherical superelastic body.

6 is a diagram modeling a fluid flow of an elastic damper for controlling flow pulsation according to an embodiment of the present invention.

Figure 7 (a) is a graph showing the pressure-volume curve according to the material, Figure 7 (b) is a graph showing that a suitable material can be found according to the average pressure.

8 is a diagram showing experimental results comparing pulsation relief of a conventional commercial pulsation damper and an elastic damper for controlling flow pulsation according to an embodiment of the present invention with respect to a peristaltic pump.

9 is a view showing experimental results comparing pulsation relief of a conventional commercial pulsation damper and an elastic damper for controlling flow pulsation according to an embodiment of the present invention with respect to an axial flow pump.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

Since the present invention may have various changes and various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the present invention to the specific disclosed form, and includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Referring to FIG. 1 , the flow pulsation control elastic damper includes a body portion 100, an inlet portion 110, and an outlet portion 120. The flow pulsation control elastic damper may further include an inlet support part 210 and an outlet support part 220 .

The body portion 100 forms an inner spherical space portion SP in a spherical shape, and may have elasticity by being formed of an elastic body. For example, the body portion 100 may be formed using a silicone elastomer. For example, Ecoflex's elastomer has good biocompatibility, so there is a case in which a pressure sensor applicable to the bio/medical field has been developed, and the flow pulsation control elastic damper according to an embodiment of the present invention can also be applied to the bio/medical field will be. In addition, silicone elastomer has excellent heat resistance and cold resistance compared to general organic synthetic rubber, can be used for a long time without deterioration of physical properties even when temperature changes, maintains flexibility, and does not significantly change electrical properties, so that the body portion (100 ) is suitable for the material.

The inlet part 110 forms an inlet communicating with the space part SP and may have a cylindrical shape connected to the body part. The outlet part 120 forms an outlet communicating with the space part SP and may have a cylindrical shape connected to the body part.

The inlet 110 and the outlet 120 may be disposed on a straight line by being located in opposite directions of the body 100 . The inlet part 110 and the outlet part 120 may be inclined at a predetermined angle from each other, but it may be advantageous in the manufacturing process to have a predetermined angle or more in consideration of the removal of the internal mold in the manufacturing process.

In general, a peristaltic pump is a pump that transports fluid in the form of squeezing a tube from the outside, and is the most widely used pump in situations where constant delivery of fluid without external contamination is important.

By adjusting the rotational speed of the rotor constituting these peristaltic pumps, it is possible to discharge a fixed amount by finely adjusting the flow rate, so it is used for blood supply during heart surgery or to continuously inject an accurate amount to supply drugs to the patient's body. It can be used in an environment where a small amount of flow is controlled without contamination by a pump, such as a treatment situation or a portable drug infusion pump. In addition, when corrosion due to chemicals or damage due to sludge occurs, only the hose needs to be replaced, which is convenient for hygiene management, and the hose, which is the only replacement part, can be easily replaced in a short period of time, which is effective and economical.

Such a peristaltic pump compresses a tube between a roller of a rotor part and an external housing, and suctions and discharges fluid through pressure inside the tube generated while the rotor rotates. However, flow fluctuations occur during this process.

Flow pulsation occurring in fluid transport is known to be a problem for patients in a medical environment because drug/blood is delivered discontinuously. In addition, pulsation causes various problems in various industrial fields using fluid movement.

The flow pulsation control elastic damper according to the present embodiment is composed of an elastomer based on a balloon filled with water, and the volume of the body portion 100 fluctuates while controlling the flow pulsation due to the hyperelastic property of the elastic body. It acts as an elastic damper. In particular, due to the hyperelastic nature of the body part 100 composed of an elastic body, the flow pulsation control elastic damper plays a role similar to that of a capacitor in an electronic circuit in the fluid transport system, and thus effectively reduces pulsation. there is. In addition, it was confirmed that the flow pulsation control elastic damper according to the present embodiment can be applied for medical purposes.

According to this embodiment, the flow rate pulsation control elastic damper can reduce the flow rate pulsation of a fluid transportation system including a pump and a flow path connected to the pump. At this time, the flow pulsation control elastic damper can efficiently reduce the pulsation by using the fluidly changing volume and elasticity due to its hyperelastic property.

An optimal flow rate pulsation control elastic damper can be designed using the flow rate flowing into the flow pulsation control elastic damper, the volume, thickness, and physical properties of the flow pulsation control elastic damper.

The inlet support part 210 and the outlet support part 220 may support the inlet part 120 and the outlet part 130, respectively, and may be configured to be movable along the first direction D1. For example, as shown in the drawing, the body portion 100 moves in the first direction D1 and the second direction perpendicular to the first direction D1 by using a rotating member such as a wheel or a guide rail. (D2) and the third direction (D3) perpendicular to the second direction (D2) can be freely expanded and contracted in any direction.

Referring to FIG. 2, a method of manufacturing an elastic damper for controlling flow pulsation includes disposing a lower mold 10 having a hemispherical depression, an inlet groove, and an outlet groove, and forming an elastic material on the lower mold 10 ( CT), disposing the inner mold 20 on the lower mold 10 to which the elastic material CT is applied, and further applying the elastic material CT on the inner mold 20. Applying step, disposing an upper mold 30 formed with a hemispherical depression, an inlet groove, and an outlet groove on the inner mold 20 and the lower mold 10 to which the elastic material (CT) is applied. Step, after curing the elastic material (CT) to form a flow pulsation control elastic damper (DP), the inner mold 20 is separated to the outside by using the elastic force of the flow pulsation control elastic damper (DP) steps may be included.

3(a) to 3(e) are diagrams illustrating a method of manufacturing an elastic damper for controlling flow pulsation according to another embodiment of the present invention.

Referring to FIG. 3 (a), a hemispherical depression 12, an inlet groove 16 connected to the depression 12, and a cylindrical opening 14 connected to the depression 120 are formed. The lower mold 10 and the inner mold 20 may be prepared.

Referring to FIG. 3(b) , the inlet groove 16 and the recessed portion 120 of the lower mold 10 may be filled with an elastic material CT. At this time, the inner mold 20 may be located at a position slightly spaced apart from the recessed portion 120 (upward direction in the drawing) so that the elastic material CT can be sufficiently filled.

Referring to FIG. 3(c), in the lower mold 10 filled with the elastic material CT, a space (see SP in FIG. 1), an inlet (see FIG. 1), and an outlet (see FIG. 1) correspond to each other. The inner mold 20 having a shape may be positioned. A shape corresponding to the space of the inner mold 20 is placed in the depression 120 of the lower mold 10 so that the elastic material is interposed between the inner mold 20 and the lower mold 10. (CT) to form the body of the flow pulsation control elastic damper.

Referring to FIG. 3(d), the upper mold 30 is placed in the depression 12 and the cylindrical opening 14 where the inner mold 20 is disposed, thereby changing the shape of the flow pulsation control elastic damper. can be completed A body portion 100 that forms an inner spherical space in a spherical shape by curing the elastic material CT, an inlet portion 110 that forms an inlet communicating with the space portion and is connected to the body portion, and It is possible to form an elastic damper for controlling flow pulsation including an outlet port communicating with the space portion and an outlet portion 120 connected to the body portion.

Referring to FIG. 3(e), thereafter, the upper mold 30 and the lower mold 10 are removed, and the inner mold 20 is separated to the outside using the elastic force of the flow pulsation control elastic damper. , It is possible to manufacture the flow pulsation control damper.

Referring to FIG. 4 , in order to reduce flow pulsation of a fluid transportation system including a pump and a flow path connected to the pump, a flow pulsation reduction method using an elastic damper for controlling flow pulsation is used in the flow path. The flow pulsation reduction method may include measuring flow characteristics (S100), calculating the volume and thickness of the body (S200), and manufacturing (S300).

In the step of measuring the characteristics of the flow rate ( S100 ), the characteristics of the flow rate in the passage of the fluid transportation system may be measured. For example, the average flow rate (constant flow rate) of the inlet flow rate of the flow pulsation control elastic damper, the size of the pulsation, the frequency of the pulsation, hydraulic resistance, etc. may be measured.

In the step of calculating the volume and thickness of the body (S200), physical properties such as the volume, thickness and material of the body of the flow rate pulsation control elastic damper may be calculated using the measured flow rate characteristics.

In the manufacturing step (S300), an inner spherical space portion is formed in a spherical shape corresponding to the calculated volume and thickness, an elastic body portion formed of an elastic body and an inlet communicating with the space portion are formed, It is possible to manufacture a flow pulsation control elastic damper including an inlet connected to the body, and an outlet connected to the space, and including an outlet connected to the body.

Thereafter, the flow pulsation control elastic damper may be installed in the flow path of the fluid transportation system.

Referring to FIG. 5 (a), a general linear rubber structure increases its length (strain) along the direction in which force is applied, and the stress it receives increases proportionally.

On the other hand, referring to FIG. 5 (b), in the case of a hyperelastic material such as a balloon, the pressure deformation curve quickly reaches a maximum pressure (limit point), and then the balloon bursts as the pressure decreases and then increases again during expansion. There is a section with a slope of O between the maximum pressure and the second ascending point, and if you analyze this, it can be understood that the volume fluctuates according to the fluctuation of the input flow rate and the pressure is kept constant. Therefore, If the fluid transport system is configured so that the pressure and volume fluctuation section of the flow pulsation control elastic damper is located in the section with a slope of O on the graph, despite the pulsation of the fluid input to the flow pulsation control elastic damper, the flow pulsation control elasticity The fluid passing through the damper can be controlled to be output at a constant pressure.

Referring to FIG. 6 , the fluid flowing through the flow pulsation control elastic damper can be modeled by

Equations

1 and 2 below.

[Equation 1]

[Equation 2]

Qin = Q

Here, Qin is the inlet flow rate, V is the volume of the body, Qout is the outlet flow rate, and the inlet flow rate Qin can be expressed as the sum of the constant flow Q0 term and the pulsating asinwt term. Here, a0 is the magnitude of the pulsation, and sinwt is the vibration function of the pulsation.

The governing equation of the phase fluid model is Equation 3.

[Equation 3]

Here, Pdamper is the pressure of the flow pulsation control elastic damper, Routlet is the hydraulic resistance, k is the expansion coefficient of the body (balloon), and Vdamper is the volume of the body.

The time-dependent derivative of the governing equation is as shown in Equation 4.

[Equation 4]

Substituting the modeled formula into the governing equation is equivalent to Equation 5,

[Equation 5]

By solving the differential equation for Qout, Equation 6 can be obtained.

[Equation 6]

At this time, it can be expected that all pulsation can be theoretically removed in the zero stiffness section where the k value is 0 (the section where the slope is 0 in FIG. 5(b)) so that the coefficients of the sinwt term and the coswt term of Qout approximate 0 there is.

Referring to FIG. 7 (a), in forming the body, the pressure-volume curves were measured (EXP) and predicted (Prediction) for three samples of 2t (mm) and 3t thick materials for two materials. It can be seen that different curves are formed depending on the material and thickness. That is, by properly designing the material, thickness, volume, etc. forming the body for each desired pressure and flow rate, the pressure and flow rate range of the system can be located in the zero stiffness section where the pulsation of the fluid system can be reduced. there is.

Referring to FIG. 7 (b), it is a graph showing the relationship of the shear modulus according to the average value of the flow rate, and the corresponding value is located according to the material and thickness of the body part on the prediction curve, so that the fluid system can be properly designed. An elastic damper can be designed to control the flow pulsation that can minimize the pulsation of the flow rate.

Referring to FIG. 8 , a sample of a flow pulsation control elastic damper was fabricated and an experiment was conducted to compare pulsation relief with conventional products. For quantitative measurement, a piezoelectric pressure sensor was fabricated and normalized mechanical stress data generated due to pulsation were collected. For a comparative experiment, the degree of pulsation mitigation was compared with a commercially available pulsation damper on the market.

Difference in pulsation by showing a pressure-time graph in the case of using only a peristaltic pump (Preistatic), the case of using a conventional commercial pulsation damper (Conventional), and the case of using the elastic damper for controlling flow pulsation of the present invention (Softdamper) confirmed. As a result of checking the pulsation frequency through Fourier transform in each case, compared to the conventional commercial pulsation damper on the pressure-frequency graph, the elastic damper for controlling the flow pulsation of the present invention is numerically superior in pulsation mitigation effect Confirmed.

Through the above experiment, it was confirmed that the pulsation of the peristaltic pump was significantly reduced.

Referring to FIG. 9 , as in FIG. 6 , even in a system using an axial flow pump, superior performance compared to conventional commercial pulsation dampers was confirmed.

In the case of using only an axial flow pump (Centrifugal), in the case of using a conventional commercial pulsation damper (Conventional), and in the case of using the elastic damper for controlling the flow pulsation of the present invention (Softdamper), the pressure-time graph is shown to show the difference in pulsation confirmed. As a result of checking the pulsation frequency through Fourier transform in each case, compared to the conventional commercial pulsation damper on the pressure-frequency graph, the elastic damper for controlling the flow pulsation of the present invention is numerically superior in pulsation mitigation effect Confirmed.

Although described with reference to the above embodiments, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the present invention described in the claims below. You will be able to.

[Description of code]

100: body part 110: inlet part

120: exit part

Claims

A body portion forming an inner spherical space in a spherical shape and having elasticity by being formed of an elastic body;

an inlet portion that forms an inlet communicating with the space portion and is connected to the body portion; and

A flow pulsation control elastic damper comprising an outlet connected to the space and an outlet connected to the body.
According to claim 1,

The flow pulsation control elastic damper, characterized in that the body portion is formed using a silicone elastomer.
According to claim 1,

The flow pulsation control elastic damper, characterized in that the volume changes according to the pressure and volume of the fluid accommodated therein.
According to claim 3,

The change in the volume of the body portion is three-dimensionally performed along a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to the first and second directions, characterized in that the flow pulsation control elasticity damper.
According to claim 1,

The inlet and the outlet are cylindrical, respectively, and are disposed on a straight line in opposite directions of the body, and the distance between the inlet and the outlet is determined according to the pressure and flow rate of the fluid flowing inside the body. An elastic damper for controlling flow pulsation, characterized in that it changes.
According to claim 1,

an inlet support for supporting the inlet; and

Further comprising an outlet support for supporting the outlet,

The flow pulsation control elastic damper, characterized in that the distance between the inlet support and the outlet support varies according to the change in the volume of the body.
In order to reduce flow pulsation of a fluid transportation system including a pump and a flow path connected to the pump, in the flow pulsation reducing method of installing a flow pulsation control elastic damper in the flow path,

measuring a characteristic of a flow rate within the flow path of the fluid transport system;

Calculating the volume and thickness of the body of the flow rate pulsation control elastic damper using the measured flow rate characteristics;

An inner spherical space portion formed in a spherical shape corresponding to the calculated volume and thickness, the body portion formed of an elastic body and having elasticity, an inlet portion communicating with the space portion, and an inlet portion connected to the body portion; And forming an outlet communicating with the space and manufacturing a flow pulsation control elastic damper including an outlet connected to the body; and

and installing the flow pulsation control elastic damper in the flow path of the fluid transportation system.
According to claim 7,

The calculating step is

Flow pulsation reduction method characterized in that using the following Equation 1.

[Equation 1]

(Qin inlet flow rate, q0: constant flow rate, a0: magnitude of pulsation, sinwt, coswt: vibration function of pulsation, R: hydraulic resistance, k: expansion coefficient of body part)
According to claim 8,

A flow pulsation reduction method characterized in that the material, volume and thickness of the body are calculated so that the coefficient of the sin term and the coefficient of the cos term are 0.
According to claim 7,

The calculating step is

By theoretically calculating the pressure and volume change of the body,

Flow pulsation reduction method characterized in that the volume and thickness of the body portion is calculated to correspond to a section in which the gradient between the maximum pressure and the second pressure increase section is O in the theoretically calculated pressure-volume diagram of the body section.
According to claim 10,

The flow pulsation reduction method according to claim 1 , wherein the pump of the fluid transport system is a peristaltic pump including a motor.
disposing a lower mold in which a hemispherical depression, an inlet groove, and an outlet groove are formed;

applying an elastic material on the lower mold;

disposing an inner mold on the lower mold to which the elastic material is applied;

further applying an elastic material on the inner mold;

disposing an upper mold having a hemispherical depression, an inlet groove, and an outlet groove formed on the inner mold and the lower mold coated with the elastic material;

Curing the elastic material to form a flow pulsation control elastic damper, and then separating the inner mold to the outside using the elastic force of the flow pulsation control elastic damper Manufacturing method of the flow pulsation control elastic damper.
According to claim 12,

The flow pulsation control damper forms an inner spherical space in a spherical shape, a body portion formed of an elastic body and having elasticity, an inlet port communicating with the space portion, and an inlet portion connected to the body portion, and the space A method of manufacturing a flow pulsation control elastic damper, characterized in that it forms an outlet communicating with the body and comprises an outlet connected to the body.
A body portion forming an inner spherical space in a spherical shape, an inlet connected to the space, and an inlet connected to the body, and an outlet connected to the space, and connected to the body. In the manufacturing method of the flow pulsation control elastic damper comprising an outlet,

disposing a lower mold formed with a hemispherical depression, an inlet groove connected to the depression, and a cylindrical opening connected to the depression;

filling the inlet groove of the lower mold with an elastic material;

disposing an inner mold having a shape corresponding to the space, the inlet, and the outlet in the lower mold filled with the elastic material;

disposing an upper mold within the recessed portion and the cylindrical opening where the inner mold is disposed;

Curing the elastic material to form a flow pulsation control elastic damper, and then separating the inner mold to the outside using the elastic force of the flow pulsation control elastic damper Manufacturing method of the flow pulsation control elastic damper.