CN114036802A - Passive self-moving structure design method and low-temperature control switch - Google Patents
Passive self-moving structure design method and low-temperature control switch Download PDFInfo
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- CN114036802A CN114036802A CN202111400104.8A CN202111400104A CN114036802A CN 114036802 A CN114036802 A CN 114036802A CN 202111400104 A CN202111400104 A CN 202111400104A CN 114036802 A CN114036802 A CN 114036802A
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Abstract
The invention discloses a design method of a passive self-moving structure, which comprises the following steps: determining the relative movement distance of the first assembly and the second assembly when the temperature is changed from normal temperature to service temperature, and calculating the relative movement distance t of the first assembly and the second assembly in the non-self-sourced movement structure when the temperature is changed from normal temperature to service temperature and the first assembly and the second assembly move in the same direction1And the relative movement distance t of the reverse movement2(ii) a Determining the distance t between the first component and the second component in the normal temperature state0When moving in the same direction, according to the relative position relationship of the first component and the second component and t1Determining t0When moving in the reverse direction, according to the relative position relationship of the first component and the second component and t2Determining t0. The design method of the passive self-moving structure provided by the invention accurately calculates the relative movement distance of the first component and the second component at the service temperature, thereby realizing the preset room at normal temperatureAnd (5) completing the design. The invention also discloses a low-temperature control switch.
Description
Technical Field
The invention relates to the field of motion structures, in particular to a design method of a passive self-motion structure.
Background
In the design of very warm service structure, can involve the temperature and rise to high temperature or fall to microthermal operating mode from the normal atmospheric temperature usually, because the structure is inside to be constituteed by multiple part, the coefficient of linear expansion of different materials is different, and there is great difference in the deformation of the normal atmospheric temperature end of the same kind of part and very warm end in addition, can make and produce great relative displacement between each part of structure inside.
The designer can design the structure at the service temperature and use the structure at the service temperature to ensure the smooth operation of the structure. But the service temperature of part of the service temperature is far higher or lower than the normal temperature, which not only has extremely high requirements on equipment, but also causes certain load on the health of production personnel. Therefore, designers often choose to design at normal temperature and reserve a deformation gap to ensure that the structure can normally operate at service temperature.
Generally, when the temperature variation range is small, a designer can look up the average linear expansion coefficient of the material used by the component in the service temperature range from the material linear expansion coefficient table, calculate the deformation amount and reserve the deformation distance for design, so as to ensure that the designed structure can smoothly realize the design function of the structure in an extremely-warm state. However, when the temperature variation range is large, the difference between the linear expansion coefficient of the material at the service temperature and the normal temperature is large, and the practical method can generate large errors, so that the structure fails at the service temperature, and the use is influenced.
Therefore, how to accurately calculate the relative movement distance of the internal components of the structure at the service temperature to ensure that the structure can smoothly realize the design function in the abnormal temperature state after the reserved distance in the normal temperature state is ensured is a technical problem that needs to be solved by the technical staff in the field.
Disclosure of Invention
In view of the above, the present invention provides a method for designing a passive self-moving structure, which accurately calculates a relative movement distance of components inside the structure at a service temperature, determines a reserved distance between the components at a normal temperature, and achieves a purpose that the structure successfully realizes a design function at an abnormal temperature.
Another object of the present invention is to provide a low temperature controlled switch.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of designing a passive self-moving structure, the structure being formed by a first component and a second component, comprising at least the steps of:
the method comprises the following steps: determining the relative movement distance of the first assembly and the second assembly when the temperature changes from normal temperature to service temperature;
wherein, if the self-movement directions of the first assembly and the second assembly are the same, the relative movement distance of the first assembly and the second assembly
If the self-movement directions of the first assembly and the second assembly are opposite, the relative movement distance of the first assembly and the second assembly
Wherein:
delta L is the self-movement distance of the first component at the service temperature;
delta d is the self-movement distance of the second component at the service temperature;
cAthe specific heat capacity of the first component at the service temperature;
cA293the specific heat capacity of the first component at normal temperature;
δA293the linear expansion coefficient of the first component under the normal temperature state;
L0the length of the first component along the self-moving direction at normal temperature;
cBthe specific heat capacity of the second component at the service temperature;
cB293the specific heat capacity of the second component at normal temperature;
δB293the linear expansion coefficient of the second component under the normal temperature state;
d0the length of the second component along the self-moving direction at normal temperature;
T0is the service temperature;
t is the normal temperature;
step two: determining the distance t between the first component and the second component in the normal temperature state0；
If the self-movement directions of the first assembly and the second assembly are the same, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0；
If the self-movement directions of the first assembly and the second assembly are opposite, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0。
Preferably, in the above-mentioned design method of the non-self-derived moving structure, when the self-moving directions of the first and second assemblies are the same,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t1；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t1；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
Preferably, in the above-described method for designing a non-self-originating moving structure, when the self-moving directions of the first and second modules are opposite,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t2；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t2；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
Preferably, in the above method for designing a non-self-derived motion structure, the method further includes the following steps:
step three: determining production tolerance and fit tolerance according to the use scenes and fit relations of the first assembly and the second assembly;
step four: modeling by using three-dimensional software;
step five: and (3) checking the strength of each component by using finite element simulation analysis software aiming at different functions and loading modes of the non-self-derived motion structure.
Preferably, in the above method for designing a non-self-derived motion structure, the method further includes the following steps:
step six: and D, optimizing the structural parameters of each part according to the analysis result in the step five, calculating and checking again, and finally iterating to obtain an optimized structural model.
Preferably, in the above method for designing a non-self-derived motion structure, the normal temperature is 20 ℃.
The invention also provides a low-temperature control switch, comprising:
the first conductor is provided with a first interface connected with the external circuit;
the first conductor and the second conductor have the same self-moving direction, the linear expansion coefficient of the first conductor is larger than that of the second conductor, the normal-temperature distance between the first conductor and the second conductor in the self-moving direction is D, and the external circuit is disconnected; relative self-movement distance at service temperature
wherein:
cmthe specific heat capacity of the first conductor at the service temperature;
cm293the specific heat capacity of the first conductor at normal temperature;
δm293the linear expansion coefficient of the first conductor at normal temperature;
Lmthe length of the first conductor along the self-moving direction at normal temperature;
cvthe specific heat capacity of the second component at the service temperature;
cv293the specific heat capacity of the second component at normal temperature;
δv293the linear expansion coefficient of the second component under the normal temperature state;
dvthe length of the second component along the self-moving direction at normal temperature;
Tais the service temperature;
t is the normal temperature.
Preferably, in the cryogenic temperature control switch, the first conductor further comprises a moving part and a contact part, one end of the moving part is fixed, and the other end of the moving part is connected with the contact part so as to drive the contact part to move when the moving part moves.
Preferably, in the cryogenic temperature controlled switch, the second conductor further comprises:
a fixed surface fixedly disposed so that the second conductor does not move along the surface;
a contact surface having a distance D from the contact portion at normal temperature;
a pass-through aperture through which the moving portion passes and is spaced from the aperture periphery, the contact portion having a diameter greater than the diameter of the pass-through aperture.
Preferably, in the low temperature controlled switch, when D is constant, T is set to be constantaThe smaller the difference from T, the larger the difference in the linear expansion coefficients of the selected conductor materials.
According to the technical scheme, the passive self-moving structure design method is different from the prior art in that the linear expansion coefficients of the first component and the second component at the service temperature are accurately calculated, instead of table lookup, the average linear expansion coefficient in the temperature range is obtained, so that the accurate relative movement distance is obtained, the design requirement can be met at the service temperature after the distance between the first component and the second component is designed and reserved at the normal temperature, and the design function of the self-moving structure can be smoothly realized.
Drawings
Fig. 1 is a flowchart of a method for designing a passive self-moving structure according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a relationship between a low temperature control switch and a temperature control switch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a low temperature control switch according to an embodiment of the present invention;
wherein 100 is a first conductor, 110 is a first interface, 120 is a moving part, 130 is a contact part, 200 is a second conductor, 210 is a second interface, 220 is a fixed surface, 230 is a contact surface, and 240 is a through hole.
Detailed Description
The core of the invention is to disclose a passive self-moving structure design method, which is used for accurately calculating the relative movement distance of the internal components of the structure at the service temperature to complete the structure design at the normal temperature.
The other core of the invention is to disclose a low-temperature control switch designed by using the design method.
In order that those skilled in the art will better understand the solution of the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
In the existing design of the non-constant temperature service structure, a designer often chooses to adopt a method of designing at a normal temperature state and reserving deformation gaps to ensure that the structure can normally run at the service temperature, generally, when the temperature variation range is small, the designer finds out the average linear expansion coefficient of the component in the service temperature range from a material linear expansion coefficient table, calculates the deformation amount and reserves the deformation distance for designing, and ensures that the designed structure can smoothly realize the design function of the structure at the non-constant temperature state. However, when the temperature variation range is large, the difference between the linear expansion coefficient of the material at the service temperature and the normal temperature is large, and the practical method can generate large errors, so that the structure fails at the service temperature, and the use is influenced.
In order to overcome the problems, the inventor conceives and provides a design method of a passive self-moving structure, and by accurately calculating the relative movement distance of components in the structure at the service temperature and reserving deformation distances for the components at the normal temperature, the components can be ensured to achieve the required matching relation at the service temperature, and the design function is realized. For details, see the detailed description below.
The invention discloses a design method of a passive self-moving structure, which at least comprises the following steps:
the passive self-moving structure is a structure formed by a first component and a second component;
step S01: determining the relative movement distance of the first assembly and the second assembly when the temperature changes from normal temperature to service temperature;
wherein, if the self-movement directions of the first assembly and the second assembly are the same, the relative movement distance of the first assembly and the second assembly
It should be noted that, the first component and the second component move in the same direction, which means that the fixed ends of the first component and the second component are on the same side, and the moving end moves towards the fixed end at the same time.
If the self-movement directions of the first assembly and the second assembly are opposite, the relative movement distance of the first assembly and the second assembly
It should be noted that, the first component and the second component are opposite in self-moving direction, which means that the fixed ends of the first component and the second component are on different sides, and the moving ends move relatively at the same time.
Wherein:
delta L is the self-movement distance of the first component at the service temperature;
delta d is the self-movement distance of the second component at the service temperature;
cAthe specific heat capacity of the first component at the service temperature;
cA293the specific heat capacity of the first component at normal temperature;
δA293the linear expansion coefficient of the first component under the normal temperature state;
L0the length of the first component along the self-moving direction at normal temperature;
cBthe specific heat capacity of the second component at the service temperature;
cB293the specific heat capacity of the second component at normal temperature;
δB293the linear expansion coefficient of the second component under the normal temperature state;
d0the length of the second component along the self-moving direction at normal temperature;
T0is the service temperature;
t is the normal temperature;
it should be noted that the service temperature T can be determined according to the usage scenario and the internal structure relationship of the self-moving structure0The length L of the first component along the self-moving direction at normal temperature0And the length d of the second component along the self-moving direction at normal temperature0。
It should be further noted that the linear expansion coefficient delta of the first member at room temperatureA293And coefficient of linear expansion c of the second componentB293The linear expansion coefficient can be obtained by looking up according to a material linear expansion coefficient table, and can also be obtained by measuring according to a push rod type indirect method, a telescope direct reading method or a laser measuring method.
The specific heat capacity of the material at any temperature can be obtained according to the Debye law, and the service temperature T of the self-moving structure is determined0Then, c is calculated by Debye's lawA、cB、cA293And cB293Defining normal temperature T as 20 deg.C, and calculating the relative movement distance T of the first assembly and the second assembly1And t2。
Step S02: determining the distance t between the first component and the second component in the normal temperature state0；
If the first and second componentsIf the self-movement directions are the same, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0；
If the self-movement directions of the first assembly and the second assembly are opposite, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0。
It should be noted that, in the above embodiment, the specific heat capacity and the expansion coefficient of the material are obtained by determining the material of the first component and the second component, so as to determine the relative movement distance t of the first component and the second component at the service temperature1And t2In another embodiment of the present invention, t may be determined0The linear expansion coefficients at the service temperature of the first and second components are calculated so that the materials of the first and second components are selected to complete the design.
It should be further noted that the following method can be used to calculate the self-movement distance Δ L ═ δ of the first component at the service temperatureA·L0·(T0T), the free movement distance Δ d ═ δ of the second component at the service temperature can likewise be calculatedB·d0·(T0-T), wherein:
δAthe linear expansion coefficient of the first component at the service temperature;
δBthe linear expansion coefficient of the second component at the service temperature;
from the above calculation, δ can be determinedAAnd deltaBValue of (d) due toA＝δA293·cA/cA293And deltaB＝δB293·cB/cB293The linear expansion delta of the first and second components at room temperature can be foundA293、δB293And selecting corresponding materials according to the material expansion coefficient table to complete the design.
Compared with the prior art, the passive self-moving structure design method provided by the invention has the difference that the linear expansion coefficients of the first component and the second component at the service temperature are accurately calculated, instead of table lookup, the average linear expansion coefficient in the temperature range is obtained, so that the accurate relative movement distance is obtained, the design requirement can be met at the service temperature after the distance between the first component and the second component is designed and reserved at the normal temperature state, and the design function of the non-self-moving structure can be smoothly realized.
Further, in the above-mentioned design method of the non-self-derived moving structure, when the self-moving directions of the first and second components are the same,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t1；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t1At a pitch of t0-t1；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
Further, in the above-mentioned design method of the non-self-derived movement structure, when the self-movement directions of the first and second components are opposite,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t2；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t2At a pitch of t0-t2；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
In order to further optimize the above scheme, the method for designing a passive self-moving structure disclosed in this embodiment further includes:
step S03: determining production tolerance and fit tolerance according to the use scenes and fit relations of the first assembly and the second assembly;
step S04: modeling by using three-dimensional software;
step S05: and (3) checking the strength of each component by using finite element simulation analysis software aiming at different functions and loading modes of the non-self-derived motion structure.
It should be noted that, because a certain absolute error exists in the production equipment, and the required fit relationship inside different structures is different, tolerance analysis needs to be performed on the related passive self-moving structure, and a tolerance band of each component is defined to ensure that the structure realizes a design function at a service temperature.
In order to further optimize the above scheme, the method for designing a passive self-moving structure disclosed in this embodiment further includes:
step S06: and according to the analysis result in the step S05, calculating and checking the optimized structural parameters of each part again, and finally iterating to obtain the optimized structural model.
It should be noted that, when the analysis result in the step S05 does not meet the operating requirement of the operating condition, the topology optimization method is used to optimize the model, and the steps S05 and S06 are repeated again until the analysis result is qualified.
Further, in the above design method of the non-self-derived motion structure, the normal temperature state is a normal temperature standard in the engineering design field, and is generally 20 ℃.
As shown in fig. 2 and fig. 3, the invention also discloses a low-temperature-controlled switch designed by using the design method of the non-self-derived motion structure, which comprises:
a first conductor 100 provided with a first interface 110 connected to an external circuit;
the second conductor 200 is provided with a second interface 210 connected with an external circuit, the self-movement directions of the first conductor 100 and the second conductor 200 are the same, and the linear expansion coefficient of the first conductor 100 is greater than that of the second conductor 200, namely, under the condition of the same temperature change, the deformation distance of the first conductor 100 is greater than that of the second conductor 200; the distance between the first conductor 100 and the second conductor 200 in the direction of self-movement at normal temperature is D, the external circuit is disconnected at normal temperature, and T is at service temperatureaResulting relative self-movement distance
Wherein:
cmthe specific heat capacity of the first conductor at the service temperature;
cm293the specific heat capacity of the first conductor at normal temperature;
δm293the linear expansion coefficient of the first conductor at normal temperature;
Lmthe length of the first conductor along the self-moving direction at normal temperature;
cvthe specific heat capacity of the second component at the service temperature;
cv293the specific heat capacity of the second component at normal temperature;
δv293the linear expansion coefficient of the second component under the normal temperature state;
dvthe length of the second component along the self-moving direction at normal temperature;
Tais the service temperature;
t is the normal temperature.
In order to further optimize the above technical solution, the first conductor 100 disclosed in this embodiment further includes a moving portion 120 and a contact portion 130, the moving portion 120 is a structural component that moves by itself due to temperature change in the first conductor 100, one end of the moving portion is fixedly constrained, and the other end of the moving portion is connected to the contact portion 130, so as to move by itself and drive the contact portion 130 to move when the temperature changes, and when the contact portion 130 contacts the second conductor 200, the low temperature control switch is closed, and the circuit is closed.
Further, the second conductor 200 disclosed in the present embodiment further includes:
a fixing surface 220, wherein the fixing surface 220 is a surface of the second conductor 200 facing away from the contact portion 130 of the first conductor 100 and is fixedly arranged so that the second conductor 200 is displaced away from the surface when the temperature changes and moves;
a contact surface 230, the contact surface 230 being a surface on which the second conductor 200 is displaced when it moves by itself due to a temperature change, the contact surface 230 being close to the contact portion 130 and the distance D from the contact part 130, when the temperature changes from normal temperature to service temperature, the first conductor 100 and the second conductor 200 move relatively for a distance t3D, the contact surface 220 contacts the contact portion 130, a circuit path;
through the hole 240, the moving part 120 on the first conductor 100 passes through the through hole 240 of the second conductor 200 and does not contact with the periphery of the through hole 240 in the process of changing the temperature from normal temperature to the service temperature, and the diameter of the contact part 130 at one end of the moving part 120 is larger than that of the through hole 240, so that the contact part 130 does not pass through the through hole 240 of the second conductor 200 but contacts with the contact surface 230 when the shrinkage self-movement occurs. .
Further, in the low temperature thermal switch, when the distance D between the first conductor 100 and the second conductor 200 is a fixed value, the difference between the service temperature and the normal temperature is inversely proportional to the difference between the linear expansion coefficients of the selected conductor materials, and when T is equal to TaThe smaller the difference from T, the greater the difference in the linear expansion coefficients of the conductor materials selected to ensure that sufficient relative movement distance of first conductor 100 and second conductor 200 will occur to satisfy T3＝D。
The terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for designing a passive self-moving structure, said structure being formed by a first component and a second component, comprising at least the following steps:
the method comprises the following steps: determining the relative movement distance of the first assembly and the second assembly when the temperature changes from normal temperature to service temperature;
wherein, if the self-movement directions of the first assembly and the second assembly are the same, the relative movement distance of the first assembly and the second assembly
If the self-movement directions of the first assembly and the second assembly are opposite, the relative movement distance of the first assembly and the second assembly
Wherein:
delta L is the self-movement distance of the first component at the service temperature;
delta d is the self-movement distance of the second component at the service temperature;
cAthe specific heat capacity of the first component at the service temperature;
cA293the specific heat capacity of the first component at normal temperature;
δA293the linear expansion coefficient of the first component under the normal temperature state;
L0the length of the first component along the self-moving direction at normal temperature;
cBthe specific heat capacity of the second component at the service temperature;
cB293the specific heat capacity of the second component at normal temperature;
δB293the linear expansion coefficient of the second component under the normal temperature state;
d0the length of the second component along the self-moving direction at normal temperature;
T0is the service temperature;
t is the normal temperature;
step two: determining the distance t between the first component and the second component in the normal temperature state0；
If the self-movement directions of the first assembly and the second assembly are the same, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0；
If the self-movement directions of the first assembly and the second assembly are opposite, determining t according to the relative position relation and the relative movement distance of the first assembly and the second assembly at the service temperature0。
2. The method of claim 1, wherein when the self-moving directions of the first and second components are the same,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t1；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t1；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
3. The method of claim 1, wherein when the self-moving directions of the first and second components are opposite,
if the relative position relationship of the first component and the second component at the service temperature is contact, t0＝t2；
If the relative position relationship of the first component and the second component at the service temperature is that the distance is larger than 0, t0＞t2；
If the relative position relationship of the first component and the second component at the service temperature is compaction, t0＜t2。
4. The method of designing a passive self-moving structure of claim 1, further comprising the steps of:
step three: determining production tolerance and fit tolerance according to the use scenes and fit relations of the first assembly and the second assembly;
step four: modeling by using three-dimensional software;
step five: and (3) checking the strength of each component by using finite element simulation analysis software aiming at different functions and loading modes of the non-self-derived motion structure.
5. The method of designing a passive self-moving structure of claim 4, further comprising:
step six: and D, optimizing the structural parameters of each part according to the analysis result in the step five, calculating and checking again, and finally iterating to obtain an optimized structural model.
6. A method of designing a passive self-moving structure according to any of claims 1 to 5, wherein the ambient temperature is 20 ℃.
7. A cryogenic temperature controlled switch, comprising:
a first conductor (100) provided with a first interface (110) connected to an external circuit;
the second conductor (200) is provided with a second interface (210) connected with an external circuit, the self-movement directions of the first conductor (100) and the second conductor (200) are the same, the linear expansion coefficient of the first conductor (100) is larger than that of the second conductor (200), the normal-temperature distance between the first conductor (100) and the second conductor (200) in the self-movement direction is D, and the external circuit is disconnected; relative self-movement distance at service temperature
t3D, externally connecting a circuit path;
wherein:
cmthe specific heat capacity of the first conductor at the service temperature;
cm293the specific heat capacity of the first conductor at normal temperature;
δm293the linear expansion coefficient of the first conductor at normal temperature;
Lmthe length of the first conductor along the self-moving direction at normal temperature;
cvthe specific heat capacity of the second component at the service temperature;
cv293the specific heat capacity of the second component at normal temperature;
δv293the linear expansion coefficient of the second component under the normal temperature state;
dvthe length of the second component along the self-moving direction at normal temperature;
Tais the service temperature;
t is the normal temperature.
8. The cryogenic temperature controlled switch of claim 7, wherein the first conductor (100) further comprises a moving part (120) and a contact part (130), the moving part (120) is fixed at one end and connected with the contact part (130) at the other end to drive the contact part (130) to move when moving by itself.
9. The cryogenic temperature controlled switch of claim 8, wherein the second conductor (100) further comprises:
a fixed surface (220) fixedly disposed so that the second conductor (200) does not move along the surface;
a contact surface (230), wherein the distance between the contact surface (230) and the contact portion (120) at normal temperature is D;
a through hole (240), the moving part (120) passing through the through hole (240) and spaced from the hole periphery, the diameter of the contact part (130) being larger than the diameter of the through hole (240).
10. The cryogenic temperature controlled switch of any one of claims 7 to 9, wherein when D is constant, T isaThe smaller the difference from T, theThe larger the difference in the linear expansion coefficients of the selected conductor materials.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111400104.8A CN114036802A (en) | 2021-11-19 | 2021-11-19 | Passive self-moving structure design method and low-temperature control switch |
| PCT/CN2021/134743 WO2023087399A1 (en) | 2021-11-19 | 2021-12-01 | Passive self-moving structural design method and low-temperature temperature-controlled switch |
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| CN202111400104.8A CN114036802A (en) | 2021-11-19 | 2021-11-19 | Passive self-moving structure design method and low-temperature control switch |
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| CN (1) | CN114036802A (en) |
| WO (1) | WO2023087399A1 (en) |
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|---|---|---|---|---|
| US6674620B2 (en) * | 2000-12-04 | 2004-01-06 | Texas Instruments Incorporated | Hermetic single phase motor protector |
| JP5447750B2 (en) * | 2006-12-14 | 2014-03-19 | 国立大学法人福井大学 | Temperature distribution calculation method for ball screw in operation and displacement correction method based on the method |
| CN201345424Y (en) * | 2009-02-13 | 2009-11-11 | 中国电子科技集团公司第五十四研究所 | Antenna device capable of automatically adjusting reflecting plane thermal deformation |
| CN201374388Y (en) * | 2009-03-27 | 2009-12-30 | 中国电子科技集团公司第五十四研究所 | Antenna device of two-dimensional thermal deformation adaptive reflector surface |
| DE102019128367B4 (en) * | 2019-10-21 | 2021-06-10 | Marcel P. HOFSAESS | TEMPERATURE DEPENDENT SWITCH |
| CN112016143B (en) * | 2020-08-13 | 2021-09-07 | 北京科技大学 | Calculation method for beam bridge mid-span vertical displacement along with temperature change |
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2021
- 2021-11-19 CN CN202111400104.8A patent/CN114036802A/en active Pending
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