CN112364572B - Flow channel design method capable of being replaced quickly for liquid rubber composite node - Google Patents

Flow channel design method capable of being replaced quickly for liquid rubber composite node Download PDF

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CN112364572B
CN112364572B CN202011123746.3A CN202011123746A CN112364572B CN 112364572 B CN112364572 B CN 112364572B CN 202011123746 A CN202011123746 A CN 202011123746A CN 112364572 B CN112364572 B CN 112364572B
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rubber composite
liquid rubber
runner
composite node
external
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CN112364572A (en
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黄友剑
罗俊
许东日
陈俊辉
曾先会
唐运轮
张志强
张玉祥
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Zhuzhou Times Ruiwei Damping Equipment Co ltd
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Zhuzhou Times Ruiwei Damping Equipment Co ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • G06F30/28Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00Details relating to the application field
    • G06F2113/08Fluids
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00Details relating to the application field
    • G06F2113/14Pipes
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14Force analysis or force optimisation, e.g. static or dynamic forces

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Abstract

The invention discloses a runner design method for a liquid rubber composite node, which is characterized in that the liquid rubber composite node is divided into a liquid rubber composite node body and a runner, the runner is externally arranged outside the liquid rubber composite node body and is connected with the liquid rubber composite node body in a detachable mode, so that a plurality of liquid cavities in the liquid rubber composite node body are communicated through the externally arranged runner; the performance of the liquid rubber composite node is tested by changing different runners or the performance of the liquid rubber composite node is tested by changing different liquid rubber composite node bodies, so that a runner design scheme meeting actual working conditions is found. The invention can conveniently and rapidly carry out replacement test on different types of liquid rubber composite nodes, saves time and labor, rapidly obtains test data of various types of liquid rubber composite nodes, and finds the runner design scheme which accords with the actual working condition at maximum efficiency.

Description

Flow channel design method capable of being replaced quickly for liquid rubber composite node
Technical Field
The invention relates to a runner design method, in particular to a runner design method capable of being replaced quickly for a liquid rubber composite node.
Background
When the rotating arm node runs at a high speed (high-frequency vibration) in a straight line according to the dynamics requirement, larger radial rigidity is provided to ensure the running stability and improve the critical speed; when the curve is crossed (low frequency and large amplitude), the smaller rigidity performance is provided to ensure the curve crossing performance, so that the abrasion is reduced; the common node is difficult to realize the characteristics, particularly for old lines, the wheel rail and the lines are more worn, and the maintenance cost is high, so that a new product is needed to be used, and the novel node has the characteristics, namely the liquid rubber composite node.
Liquid rubber composite rotary arm node working principle: two hollow cavity structures are designed in the rubber part, the two cavities are communicated through a runner design, and incompressible (viscous) liquid is filled and sealed in one cavity in advance. The volumes in the two cavities change under the action of load, and liquid flows between the two cavities to generate damping, so that vibration energy is consumed, and the purpose of damping vibration is achieved. When in low-frequency vibration, liquid flows up and down through the channel, so that a large damping effect is achieved, liquid in a high-frequency section does not flow, the damping value is small, vibration is effectively isolated, dynamic rigidity is basically stable and kept unchanged under high-frequency vibration, and the effect of preventing dynamic hardening is achieved. The frequency ratio of the system is basically kept unchanged, and a good vibration reduction effect is still achieved.
Therefore, the runner design plays an important role in the design of liquid rubber composite node products. In the liquid rubber composite node, the flow channels are all internally arranged in the liquid rubber composite node, so that the process is complex and complicated in order to obtain the flow channel structure conforming to the actual working condition in design.
In the prior art, when designing a runner in a liquid rubber composite node, in order to find a runner design scheme conforming to actual working conditions, the liquid rubber composite node of different types needs to be replaced for multiple times, and a suitable runner can be found through repeated experiments. In addition, the flow channel design scheme obtained by adopting the product simulation design is not applicable here, because the test data obtained by adopting the product simulation design has a certain deviation from the actual data, so that the flow channel design scheme obtained by adopting the product simulation design does not accord with the actual working condition, and therefore, the applicability of the flow channel design scheme can be ensured only by adopting the data obtained by carrying out replacement test on different types of liquid rubber composite nodes.
However, in order to obtain an ideal runner design scheme, the product needs to be repeatedly replaced for testing, and the testing process is very complex, time-consuming and labor-consuming, and causes great inconvenience to the runner design in the liquid rubber composite node.
Therefore, it is urgently needed to design a runner design method for quickly replacing liquid rubber composite nodes, so that replacement tests can be conveniently and quickly performed on different types of liquid rubber composite nodes, time and labor are saved, test data of various types of liquid rubber composite nodes are quickly obtained, and the runner design scheme meeting actual working conditions is found to be the technical problem to be solved in an efficient manner.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a runner design method capable of being replaced quickly for liquid rubber composite nodes, which can be used for replacing different types of liquid rubber composite nodes conveniently and quickly, saves time and labor, quickly obtains test data of various types of liquid rubber composite nodes, and finds a runner design scheme conforming to actual working conditions at maximum efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: a runner design method for a liquid rubber composite node capable of being replaced quickly is characterized in that the liquid rubber composite node is divided into a liquid rubber composite node body and a runner, the runner is externally arranged outside the liquid rubber composite node body and is connected with the liquid rubber composite node body in a detachable mode, so that a plurality of liquid cavities in the liquid rubber composite node body are communicated through the externally arranged runner; the performance of the liquid rubber composite node is tested by changing different runners or the performance of the liquid rubber composite node is tested by changing different liquid rubber composite node bodies, so that a runner design scheme meeting actual working conditions is found.
Preferably, when testing the performance of a liquid rubber composite node by replacing a different liquid rubber composite node body, the specific steps are as follows:
firstly, arranging a liquid rubber composite node body, wherein a liquid cavity I and a liquid cavity II are arranged in the liquid rubber composite node body, external connectors are arranged at two ends of an external runner, and two ends of the liquid rubber composite node body are respectively connected with the two external connectors in a detachable structure, so that the liquid cavity I and the liquid cavity II are communicated through the external runner;
after the connection is finished, the liquid rubber composite node with the external flow channel is sent to be tested for performance; after the test is completed, the liquid rubber composite node body is lowered, another liquid rubber composite node body is replaced, and the performance test is performed again; and repeating the operation in such a way, thereby finding a flow channel design scheme conforming to the actual working condition.
Preferably, when testing the performance of the liquid rubber composite node by replacing different flow channels, the specific steps are as follows:
firstly, arranging a liquid rubber composite node body, wherein a liquid cavity I and a liquid cavity II are arranged in the liquid rubber composite node body, external connectors are arranged at two ends of the liquid rubber composite node body, two ends of an external runner are respectively connected with the two external connectors in a detachable structure, and finally the liquid cavity I and the liquid cavity II are communicated through the external runner;
after the connection is finished, the liquid rubber composite node with the external flow channel is sent to be tested for performance; after the test is completed, the external flow channel is detached, another external flow channel is replaced, and the performance test is performed again; and repeating the operation in such a way, thereby finding a flow channel design scheme conforming to the actual working condition.
Preferably, the external joint at one end of the liquid rubber composite node body is connected with one port of a single-pass joint I with a valve, the external joint at the other end of the liquid rubber composite node body is connected with one port of a single-pass joint II with a valve, the other port of the single-pass joint II is connected with one port of a three-way joint with a valve, one end of the external runner is connected with the other port of the single-pass joint with a valve in a detachable structure, and the other end of the external runner is connected with the other port of the three-way joint with a valve in a detachable structure, so that the external runner is connected with the three-way joint with a detachable structure; the remaining end of the three-way joint with the valve is connected with one end of a three-way joint with the valve, and the other end of the three-way joint with the valve is provided with a filling or vacuum interface.
Preferably, when the external runner is replaced, the valve of the first single-pass joint, the valve of the second single-pass joint and the valve of the three-way joint are closed firstly, then the external runner is disassembled, a new external runner is replaced, two ends of the new external runner are respectively and well connected with the first single-pass joint and the three-way joint, then the valve of the three-way joint and the valve of the third single-pass joint are opened, at the moment, a filling or vacuum interface is connected with a vacuumizing device, air in the replaced new external runner is pumped away by the vacuumizing device, then the valve of the third single-pass joint is closed, the vacuumizing device connected with the filling or vacuum interface is replaced by a liquid filling device, then the valve of the third single-pass joint, the valve of the first single-pass joint and the valve of the second single-pass joint are opened, liquid filling is carried out on the replaced new external runner by the liquid filling device, and after filling is finished, the valve of the third single-pass joint is closed, and the replacing process of the external runner is completed.
Preferably, the finding the flow channel design scheme conforming to the actual working condition refers to finding the flow channel conforming to the actual working condition by researching the relation between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channel.
Preferably, the relationship between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels is as follows:
when the flow passage aperture is smaller, the lifting frequency of the dynamic stiffness is lower, and therefore, the dynamic stiffness inflection point is reached faster.
Preferably, the relationship between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels is as follows:
when the length of the flow passage is longer, the lifting frequency of the dynamic stiffness is lower, and therefore, the dynamic stiffness inflection point is reached faster.
Preferably, the external flow channel can be a round pipe or a square pipe.
Preferably, the external flow channel can be a hard tube or a soft tube.
The invention has the beneficial effects that: according to the invention, the built-in runner is changed into the external runner, and the external runner is connected with the liquid rubber composite node body in a detachable structure, so that replacement tests can be conveniently and rapidly carried out on different types of liquid rubber composite nodes, time and labor are saved, test data of various types of liquid rubber composite nodes are rapidly obtained, and a runner design scheme conforming to actual working conditions is found out at highest efficiency. In addition, because the flow channel is external and the external flow channel is connected with the liquid rubber composite node body in a detachable structure, the liquid rubber composite node can be tested by replacing different liquid rubber composite node bodies or by replacing different flow channels, so that the obtained test data has practicability, and the flow channel design scheme can meet the requirements of actual working conditions better. By designing the replacement method of the external runner, the accuracy of the performance test of the liquid rubber composite node can be further ensured, and the runner design scheme is optimized. By researching the relation between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels, the flow channels which meet the actual working conditions can be better found.
Drawings
FIG. 1 is a schematic structural diagram of a test fixture for a liquid rubber composite node according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;
in the figure: 1. the liquid rubber composite node body comprises a liquid rubber composite node body, a liquid cavity I, a liquid cavity II, an external joint I, a 411, a threaded joint I, a 412, a threaded joint II, an external joint II, a built-in channel I, a built-in channel II, a flow channel 8, a single-pass joint I, a single-pass joint 10, a single-pass joint II, a three-way joint 11, a three-way joint 12, a single-pass joint III, and a pouring or vacuum joint 13.
Detailed Description
The technical scheme of the invention is further elaborated below with reference to the drawings and specific embodiments.
Example 1: a runner design method for a liquid rubber composite node capable of being replaced quickly is characterized in that the liquid rubber composite node is divided into a liquid rubber composite node body and a runner, the runner is externally arranged outside the liquid rubber composite node body and is connected with the liquid rubber composite node body in a detachable mode, so that a plurality of liquid cavities in the liquid rubber composite node body are communicated through the externally arranged runner; the performance of the liquid rubber composite node is tested by changing different runners or the performance of the liquid rubber composite node is tested by changing different liquid rubber composite node bodies, so that a runner design scheme meeting actual working conditions is found. According to the embodiment, the built-in runner is changed into the external runner, and the external runner is connected with the liquid rubber composite node body through the detachable structure, so that the runner in the liquid rubber composite node can be conveniently and rapidly replaced, time and labor are saved, test data of various runners of different types are rapidly obtained, and the runner design scheme meeting the actual working condition is found out most efficiently.
The specific scheme is as follows: as shown in fig. 1, a liquid rubber composite node body 1 is first provided, other structures are the same as those of a common liquid rubber composite node except that no runner is provided in the liquid rubber composite node body 1, a liquid cavity 1 and a liquid cavity 2 and a liquid cavity 3 are provided in the liquid rubber composite node body 1, external connectors with threaded ports are respectively provided at two ends of the liquid rubber composite node body 1, the external connectors comprise an external connector 4 and an external connector 5, an internal channel 6 and an internal channel 7 are further provided in the liquid rubber composite node body 1, the external connector 4 is communicated with the liquid cavity 2 through the internal channel 6, the external connector 5 is communicated with the liquid cavity 3 through the internal channel 7, and two ends of the external runner 8 are respectively connected with the external connector 4 and the external connector 5 in a threaded manner, so that the liquid cavity 2 and the liquid cavity 3 are communicated through the external runner 8. After the connection is finished, the liquid rubber composite node with the external flow channel is sent to be tested, and the performance of the liquid rubber composite node is tested and recorded; after the test is completed, the external runner 8 is disassembled, another external runner 8 is replaced, and the performance test of the liquid rubber composite node is carried out and recorded; and repeating the operation in such a way, thereby finding a flow channel design scheme conforming to the actual working condition.
The scheme is that the same liquid rubber composite node body is tested by replacing different external runners, so that the runner design scheme meeting the actual working condition is found. Here, the same external runner can be used for replacing different liquid rubber composite node bodies for testing, so that the runner design scheme meeting the actual working condition is found.
The method comprises the following specific steps: as shown in fig. 2, two ends of the external connectors are respectively provided with a first threaded connector 411 and a second threaded connector 412, the first threaded connector 411 is connected with the external flow channel 8, and the second threaded connector 412 is connected with the internal channel I6, so that the external flow channel 8 and the internal channel I6 are connected through the external connector I; the connecting structure of the external joint II is the same as that of the external joint I, so that the external runner and the internal channel II are connected through the external joint II. The arrangement is that the external joint and the liquid rubber composite joint body are connected through the detachable structure, so that the same runner can be utilized to replace different liquid rubber composite joint bodies for testing, and the runner design scheme meeting the actual working condition is found.
As shown in fig. 2, in this embodiment, an external connection at one end of the liquid rubber composite node body 1 is connected to one port of a single-pass connector with valve one 9, an external connection at the other end of the body rubber composite node body 6 is connected to one port of a single-pass connector with valve two 10, the other end port of the single-pass connector two 10 is connected to one port of a three-way connector with valve 11, one end of the external flow channel 8 is in threaded connection with the other port of the single-pass connector with valve 14, and the other end of the external flow channel 8 is in threaded connection with the other port of the three-way connector with valve 11, so that the external flow channel 8 is connected in a detachable structure; the remaining end of the valved three-way joint 11 is connected to one end of a valved one-way joint three 12, the other end of which valved one-way joint three 12 is provided as a priming or vacuum port 13.
When the external runner is replaced, the valve of the first one-way joint 9, the valve of the second one-way joint 10 and the valve of the third one-way joint 11 are closed firstly, then the external runner 8 is disassembled, then a new external runner 8 is replaced, two ends of the new external runner 8 are respectively connected with the first one-way joint 9 and the third one-way joint 11, then the valve of the third one-way joint 11 and the valve of the third one-way joint 12 are opened, at this time, the filling or vacuum interface 13 is connected with a vacuumizing device, air in the replaced new external runner 8 is pumped away by the vacuumizing device, then the valve of the third one-way joint 12 is closed, the vacuumizing device connected with the filling or vacuum interface 13 is replaced by a liquid filling device, then the valve of the third one-way joint 12, the valve of the first one-way joint 9 and the valve of the second one-way joint 10 are opened, liquid filling is carried out on the replaced new external runner 8 by the liquid filling device, and after filling is finished, the valve of the third one-way joint 12 is closed, and the replacement process of the external runner is completed. Because the liquid rubber composite node is different from the common rubber node, after the external runner is replaced through the steps, the accuracy of the performance test of the liquid rubber composite node can be further ensured, and the runner design scheme is more optimized.
In order to obtain the performance of various liquid rubber composite nodes, the external flow channel 8 can be tested by adopting various pipelines, and in terms of shape, a round pipe, a square pipe and the like can be adopted; for other hair surfaces, hard tubes, hoses, copper tubes, plastic tubes, etc. may be used. The length of the external flow channel 8 can be changed according to actual conditions.
The above-mentioned finding the runner design scheme that accords with the actual condition refers to the relation between the dynamic performance parameter of the liquid rubber compound node with different runners and the runner through researching, thus can better find the runner that accords with the actual condition.
Specifically, the applicant studied the relationship between the flow aperture and the frequency of dynamic stiffness increase, and found the test results as follows:
from the above test results, it can be seen that the lower the flow passage aperture, the lower the lifting frequency of the dynamic stiffness, and therefore, the faster the dynamic stiffness inflection point (stabilization point) is reached.
In addition, the relationship between the length of the flow path and the frequency of dynamic stiffness increase was also studied by the applicant, and the test results were as follows:
from the above test results, it can be seen that the higher the flow path length, the lower the frequency of lifting of the dynamic stiffness, and thus, the faster the dynamic stiffness inflection point (stabilization point) is reached.
In summary, the invention changes the built-in runner into the external runner and connects the external runner and the liquid rubber composite node body in a detachable structure, thereby being capable of conveniently and rapidly carrying out replacement test on different types of liquid rubber composite nodes, saving time and labor, rapidly obtaining test data of various types of liquid rubber composite nodes, and finding the runner design scheme which accords with the actual working condition at the highest efficiency. In addition, because the flow channel is external and the external flow channel is connected with the liquid rubber composite node body in a detachable structure, the liquid rubber composite node can be tested by replacing different liquid rubber composite node bodies or by replacing different flow channels, so that the obtained test data has practicability, and the flow channel design scheme can meet the requirements of actual working conditions better. By designing the replacement method of the external runner, the accuracy of the performance test of the liquid rubber composite node can be further ensured, and the runner design scheme is optimized. By researching the relation between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels, the flow channels which meet the actual working conditions can be better found.
The term "plurality" as used in this embodiment means the number of "two or more". The above embodiments are only for illustrating the present invention, not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention, so that all equivalent technical solutions shall fall within the scope of the present invention, which is defined by the claims.

Claims (7)

1. A flow channel design method capable of being replaced quickly for a liquid rubber composite node is characterized by comprising the following steps of: the liquid rubber composite node is divided into a liquid rubber composite node body and a runner, the runner is externally arranged outside the liquid rubber composite node body and is connected with the liquid rubber composite node body in a detachable mode, so that a plurality of liquid cavities in the liquid rubber composite node body are communicated through the externally arranged runner; the performance of the liquid rubber composite node is tested by replacing different runners or the performance of the liquid rubber composite node is tested by replacing different liquid rubber composite node bodies, so that a runner design scheme meeting actual working conditions is found;
when the performance of the liquid rubber composite node is tested by replacing different flow channels, the specific steps are as follows:
firstly, arranging a liquid rubber composite node body, wherein a liquid cavity I and a liquid cavity II are arranged in the liquid rubber composite node body, external connectors are arranged at two ends of the liquid rubber composite node body, two ends of an external runner are respectively connected with the two external connectors in a detachable structure, and finally the liquid cavity I and the liquid cavity II are communicated through the external runner;
after the connection is finished, the liquid rubber composite node with the external flow channel is sent to be tested for performance; after the test is completed, the external flow channel is detached, another external flow channel is replaced, and the performance test is performed again; repeating the operation in such a way, so as to find a flow channel design scheme conforming to the actual working condition;
connecting an external joint at one end of a liquid rubber composite node body with a port of a single-pass joint I with a valve, connecting an external joint at the other end of the liquid rubber composite node body with a port of a single-pass joint II with a valve, connecting the port at the other end of the single-pass joint II with a port of a three-way joint I with a valve, connecting one end of an external runner with the other port of the single-pass joint I with a valve in a detachable structure, and connecting the other end of the external runner with the other port of the three-way joint I with a valve in a detachable structure, so that the external runner is connected in a detachable structure; connecting the left end of the three-way joint with the valve with one end of a single-way joint three with the valve, wherein the other end of the single-way joint three with the valve is provided with a filling or vacuum interface;
when the external runner is replaced, the valve of the first single-pass joint, the valve of the second single-pass joint and the valve of the three-way joint are closed firstly, then the external runner is disassembled, then a new external runner is replaced, two ends of the new external runner are respectively connected with the first single-pass joint and the three-way joint, then the valve of the three-way joint and the valve of the third single-pass joint are opened, at the moment, a filling or vacuum interface is connected with a vacuumizing device, air in the replaced new external runner is pumped away by the vacuumizing device, then the valve of the third single-pass joint is closed, the vacuumizing device connected with the filling or vacuum interface is replaced by liquid filling equipment, then the valve of the third single-pass joint, the valve of the first single-pass joint and the valve of the second single-pass joint are opened, liquid filling is carried out on the replaced new external runner by the liquid filling equipment, and after filling is finished, the valve of the third single-pass joint is closed, and the replacing process of the external runner is completed.
2. The flow path design method according to claim 1, wherein: when testing the performance of a liquid rubber composite node by replacing different liquid rubber composite node bodies, the specific steps are as follows:
firstly, arranging a liquid rubber composite node body, wherein a liquid cavity I and a liquid cavity II are arranged in the liquid rubber composite node body, external connectors are arranged at two ends of an external runner, and two ends of the liquid rubber composite node body are respectively connected with the two external connectors in a detachable structure, so that the liquid cavity I and the liquid cavity II are communicated through the external runner;
after the connection is finished, the liquid rubber composite node with the external flow channel is sent to be tested for performance; after the test is completed, the liquid rubber composite node body is lowered, another liquid rubber composite node body is replaced, and the performance test is performed again; and repeating the operation in such a way, thereby finding a flow channel design scheme conforming to the actual working condition.
3. The flow path design method according to claim 1, wherein: the finding of the runner design scheme conforming to the actual working condition refers to finding the runner conforming to the actual working condition by researching the relation between the dynamic performance parameters of the liquid rubber composite nodes with different runners and the runner.
4. A flow path design method according to claim 3, wherein: the relation between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels is as follows:
when the flow passage aperture is smaller, the lifting frequency of the dynamic stiffness is lower, and therefore, the dynamic stiffness inflection point is reached faster.
5. A flow path design method according to claim 3, wherein: the relation between the dynamic performance parameters of the liquid rubber composite nodes with different flow channels and the flow channels is as follows:
when the length of the flow passage is longer, the lifting frequency of the dynamic stiffness is lower, and therefore, the dynamic stiffness inflection point is reached faster.
6. The flow path design method according to any one of claims 1 to 5, characterized in that: the external flow passage can be a round pipe or a square pipe.
7. The flow path design method according to any one of claims 1 to 5, characterized in that: the external flow passage can be a hard tube or a soft tube.
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