阅读说明：本技术 一种断路器的高低温温度补偿机构 (High-low temperature compensation mechanism of circuit breaker ) 是由 陈仲武 覃新宇 冉路瑶 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种断路器的高低温温度补偿机构,其特征在于：包括限位锁(1),限位锁(1)连接限位补偿片(2),限位补偿片(2)与限位锁(1)的限位补偿距离a为0.15-0.55mm。本发明对温度补偿机构进行设计,补偿热脱扣器高低温环境下最大形变位移,以保证高低温环境下热脱扣器与解锁机构相对位移不变,按GJB5885-2006《航空断路器通用规范》试验方法进行高低温环境试验验证,产品工作环境温度范围最高可达-55℃～+125℃,产品温度范围指标国内领先,国外先进。(The invention discloses a high and low temperature compensation mechanism of a circuit breaker, which is characterized in that: the device comprises a limiting lock (1), wherein the limiting lock (1) is connected with a limiting compensation sheet (2), and the limiting compensation distance a between the limiting compensation sheet (2) and the limiting lock (1) is 0.15-0.55 mm. The invention designs the temperature compensation mechanism to compensate the maximum deformation displacement of the thermal release in high and low temperature environments so as to ensure that the relative displacement of the thermal release and the unlocking mechanism is not changed in the high and low temperature environments, and high and low temperature environment test verification is carried out according to a test method of GJB5885-2006 aviation breaker general Specification, the temperature range of the working environment of the product can reach-55 ℃ to +125 ℃, the index of the temperature range of the product is advanced at home and abroad.)

1. The utility model provides a high low temperature compensation mechanism of circuit breaker which characterized in that: the device comprises a limiting lock (1), wherein the limiting lock (1) is connected with a limiting compensation sheet (2), and the limiting compensation distance a between the limiting compensation sheet (2) and the limiting lock (1) is 0.15-0.55 mm.

2. The high and low temperature compensation mechanism of circuit breaker according to claim 1, wherein: spacing lock (1) is including hasp (5) that locking plate (4) and slope set up, spacing compensation distance a is the distance between spacing compensation piece (2) and hasp (5).

3. The high and low temperature compensation mechanism of circuit breaker according to claim 2, wherein: the inclination angles of the locking plate (4) and the lock catch (5) are 2-11 degrees.

4. The high and low temperature compensation mechanism of circuit breaker according to claim 3, wherein: the inclination angles of the locking plate (4) and the lock catch (5) are 5-8 degrees.

5. The high and low temperature compensation mechanism of circuit breaker according to claim 1 or 2, characterized in that: spacing compensating blade (2) divide into linkage segment (6), spacing section (7) and extension section (8), linkage segment (6) are connected with the one end of spacing lock (1), spacing compensation distance an is the distance between spacing section (7) and hasp (5).

6. The high and low temperature compensation mechanism of circuit breaker according to claim 5, wherein: the limiting section (7) and the connecting section (6) are obliquely arranged, and the inclination angle is 1-20 degrees.

7. The high and low temperature compensation mechanism of circuit breaker according to claim 1, wherein: spacing shell fragment (3) are equipped with to spacing lock (1) opposite side, and spacing shell fragment (3) divide into shell fragment linkage segment (10), shell fragment section (11) and crotch section (9), and shell fragment linkage segment (10) and shell fragment section (11) slope set up, and inclination is 30-60.

8. The high and low temperature compensation mechanism of circuit breaker according to claim 7, wherein: the elastic sheet connecting section (10) of the limiting elastic sheet (3) is connected with the other side of the lock catch (5) of the limiting lock (1).

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a high-low temperature compensation mechanism of a circuit breaker.

Background

At present, most of circuit breakers used in the field of aviation are thermal circuit breakers, are operated on the basis of thermal bimetal electric heating tripping, have the characteristics of small size, light weight and the like, but are easily influenced by ambient temperature in application due to the working principle attribute, and have the phenomenon of malfunction protection, so that the working reliability of the circuit breakers is influenced. Therefore, in order to ensure the operational reliability of the product, a high-temperature and low-temperature compensation mechanism is required to be added. The existing temperature compensation mechanism has the following defects: the structure is relatively complex, or the compensation precision is not high, and the reliability is low, for example, the temperature compensation mechanism of the circuit breaker and the circuit breaker disclosed in chinese patent CN203941869U, the temperature compensation mechanism is a U-shaped structure, and can deform along with the change of the environmental temperature, so that the distance between two U-shaped supporting legs changes, the stroke displacement of the main loop tripping mechanism is compensated, and the relative displacement between the two is ensured to be unchanged, thereby ensuring that the circuit breaker can reliably work under the condition of the specified environmental temperature range; the shortcoming is that the installation needs the base, and this design structure volume and weight are great, are not suitable for the aviation circuit breaker that volume and weight required are high.

For example, the circuit breaker with temperature compensation disclosed in chinese patent CN200993942Y, wherein the temperature compensation mechanism is a straight-piece structure, and can compensate the deformation displacement of the double-metal component with a sliding piece along with the temperature change of the environment, so as to ensure that the relative displacement between the two components is not changed, thereby ensuring that the circuit breaker can reliably work within a specified environment temperature range; the disadvantage is that the compensation mechanism has a narrow compensation temperature range (the maximum temperature is only-55 ℃ to +85 ℃), and the application requirements of some characteristic environments cannot be met.

Disclosure of Invention

The invention aims to provide a high-low temperature compensation mechanism of a circuit breaker. The invention has the characteristics of simple structure, high compensation precision, wide compensation temperature range (the highest temperature can reach-55 ℃ to +125 ℃), strong environmental suitability and suitability for the special application field of the aviation circuit breaker.

The technical scheme of the invention is as follows: the high and low temperature compensation mechanism of the circuit breaker comprises a limiting lock, wherein the limiting lock is connected with a limiting compensation sheet, and the limiting compensation distance a between the limiting compensation sheet and the limiting lock is 0.15-0.55 mm.

According to the high-low temperature compensation mechanism of the circuit breaker, the limiting lock comprises the locking plate and the lock catch which is arranged in an inclined mode, and the limiting compensation distance a is the distance between the limiting compensation plate and the lock catch.

In the high-low temperature compensation mechanism of the circuit breaker, the inclination angles of the locking plate and the lock catch are 2-11 degrees.

In the high-low temperature compensation mechanism of the circuit breaker, the inclination angles of the locking plate and the lock catch are 5-8 degrees.

According to the high-low temperature compensation mechanism of the circuit breaker, the limiting compensation piece is divided into the connecting section, the limiting section and the extension section, the connecting section is connected with one end of the limiting lock, and the limiting compensation distance a is the distance between the limiting section and the lock catch.

In the high-low temperature compensation mechanism of the circuit breaker, the limiting section and the connecting section are obliquely arranged, and the inclination angle is 1-20 degrees.

In the high-low temperature compensation mechanism of the circuit breaker, the other side of the limiting lock is provided with the limiting elastic sheet, the limiting elastic sheet is divided into the elastic sheet connecting section, the elastic sheet section and the hook section, the elastic sheet connecting section and the elastic sheet section are obliquely arranged, and the inclination angle is 30-60 degrees.

In the high-low temperature compensation mechanism of the circuit breaker, the elastic sheet connecting section of the limiting elastic sheet is connected with the other side of the lock catch of the limiting lock.

The elastic sheet connecting section of the limiting elastic sheet is connected with the other side of the lock catch of the limiting lock.

Has the advantages that: compared with the prior art, the invention designs the temperature compensation mechanism to compensate the maximum deformation displacement of the thermal release in high and low temperature environments so as to ensure that the relative displacement of the thermal release and the unlocking mechanism is not changed in the high and low temperature environments, and high and low temperature environment test verification is carried out according to a test method of GJB5885-2006 aviation circuit breaker general Specification, the temperature range of the working environment of the product can reach-55 ℃ to +125 ℃, the index of the temperature range of the product is advanced at home and abroad. The invention utilizes the temperature sensitivity characteristic of a high-sensitivity thermal bimetal material, selects the high-sensitivity thermal bimetal material as a limiting compensation sheet material, and designs a temperature compensation structure of the high-sensitivity thermal bimetal material according to the working principle and the mechanism operation mechanism of the circuit breaker. The structure of the part of the limit compensating plate is designed into 3 sections, namely a connecting section, a limit section and an extension section. It was designed for 3-stage structural purposes: one section of the connecting section is connected with one end of the limiting lock; the limiting section is mainly used for performing displacement compensation on the circuit breaker tripping mechanism with smaller compensation displacement requirement, the maximum and minimum displacement travel intervals allowed between the circuit breaker tripping mechanism and the unlocking mechanism are determined through theoretical design calculation, three-dimensional motion simulation and test verification, and the limiting compensation distance a is set to be 0.15-0.55 mm; the extension section is mainly used for performing displacement compensation on the circuit breaker tripping mechanism with larger compensation displacement requirement, and the extension section is designed to have a certain inclination angle so as to increase the compensation displacement. When the displacement provided by the limiting section is not enough to compensate the displacement of the tripping mechanism in operation, the extension section is utilized to continue to compensate, so that the tripping mechanism has the balance of relative displacement between the tripping mechanism and the unlocking mechanism under different environmental temperature conditions, and the working reliability of the circuit breaker is ensured.

Inclination angle design of locking plate and lock catch

The maximum and minimum displacement travel ranges allowed between the circuit breaker tripping mechanism and the unlocking mechanism are determined through theoretical design calculation, three-dimensional motion simulation and experimental verification, so that the inclination angles of the locking plate and the lock catch are designed to be 30-60 degrees.

The effect is achieved:

the structural design has the comprehensive technical performance index higher than the indexes of similar products in the same country, achieves the aims of leading in China and advancing abroad, and is compared with the technical indexes of circuit breakers of similar advanced manufacturers in China and abroad in the following table 1:

TABLE 1 comparison of technical indexes of circuit breakers from similar advanced manufacturers at home and abroad

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the limit lock of the present invention;

FIG. 3 is a schematic view of the direction A-A in FIG. 2;

FIG. 4 is a schematic view of FIG. 2 taken along line B-B;

fig. 5-7 are schematic views of the temperature compensation mechanism before, during and during closing and opening of the circuit breaker operating mechanism.

Detailed Description

The invention is further described with reference to the following figures and examples, but not to be construed as being limited thereto.

Example 1. A high-low temperature compensation mechanism of a circuit breaker is shown in figures 1-7 and comprises a limiting lock 1, wherein the limiting lock 1 is connected with a limiting compensation piece 2, and the limiting compensation distance a between the limiting compensation piece 2 and the limiting lock 1 is 0.15-0.55 mm.

Spacing lock 1 includes locking plate 4 and the hasp 5 of slope setting, spacing compensation distance a is the distance between spacing compensation piece 2 and the hasp 5.

The inclination angles of the locking plate 4 and the lock catch 5 are 2-11 degrees. More preferably, the angle of inclination of the locking piece 4 and the locking catch 5 is 5-8 °. The effect of the inclination of the locking piece 4 and the locking catch 5 is: and compensating displacement limiting is carried out on the limiting section 7 within a certain compensation displacement range.

Spacing compensating blade 2 divide into linkage segment 6, spacing section 7 and extension section 8, linkage segment 6 is connected with the one end of spacing lock 1, spacing compensation distance an is the distance between spacing section 7 and hasp 5.

The limiting section 7 and the connecting section 6 are obliquely arranged, and the inclination angle is 1-20 degrees. The limiting section 7 is obliquely arranged, and when the compensation of the limiting section is limited, the displacement compensation can be continuously carried out.

The other side of the limiting lock 1 is provided with a limiting elastic sheet 3, the limiting elastic sheet 3 is divided into an elastic sheet connecting section 10, an elastic sheet section 11 and a hook section 9, the elastic sheet connecting section 10 and the elastic sheet section 11 are obliquely arranged, and the inclination angle is 30-60 degrees. The function is as follows: after the tripping mechanism and the unlocking mechanism are unlocked, the limiting lock mechanism can be rapidly and normally reset.

The elastic sheet connecting section 10 of the limiting elastic sheet 3 is connected with the other side of the lock catch 5 of the limiting lock 1.

The working principle is as follows: the limiting compensation sheet in the temperature compensation mechanism is made of a high-sensitivity thermal bimetal composite material and is formed by compounding 3 layers of different materials of an active layer, a middle layer and a passive layer, and the expansion coefficient of the active layer is higher than that of the passive layer. Temperature characteristics: the material is deformed and bent to the side with a low expansion coefficient at low temperature and to the side with a high expansion coefficient at high temperature.

Under the low temperature environment, because the thermal type circuit breaker works according to the electric heating tripping principle, the heat dissipation of the thermal tripping device is larger, the deformation displacement generated by the thermal tripping device is smaller than that generated by the thermal tripping device at normal temperature, the limit compensating plate 2 in the temperature compensating mechanism is influenced by low temperature to generate deformation bending to one side of the passive layer, and the displacement of the thermal tripping device which is less moved is compensated, so that the relative displacement of the thermal tripping mechanism and the unlocking mechanism is ensured to be unchanged, and the reliable unlocking tripping of the mechanism is realized.

Under the high temperature environment, because the hot type circuit breaker works with the electric heat tripping principle, the heat dissipation of the thermal release is less, and the deformation displacement that the thermal release produced under the normal temperature is big, and spacing compensating plate produces deformation bending to initiative layer one side by the high temperature influence among the temperature compensation mechanism, compensates the displacement that the thermal release was walked more, guarantees that thermal release mechanism and release mechanism unblock relative displacement do not change, realizes that the reliable unblock of mechanism is tripped.

Example 2. A high-low temperature compensation mechanism of a circuit breaker is shown in figures 1-7 and comprises a limiting lock 1, wherein the limiting lock 1 is connected with a limiting compensation piece 2, and the limiting compensation distance a between the limiting compensation piece 2 and the limiting lock 1 is 0.3 mm.

Spacing lock 1 includes locking plate 4 and the hasp 5 of slope setting, spacing compensation distance a is the distance between spacing compensation piece 2 and the hasp 5. The inclination angle of the locking plate 4 and the lock catch 5 is 6 degrees.

Spacing compensating blade 2 divide into linkage segment 6, spacing section 7 and extension section 8, linkage segment 6 is connected with the one end of spacing lock 1, spacing compensation distance an is the distance between spacing section 7 and hasp 5.

Spacing section 7 sets up with the linkage segment 6 slope, and inclination is 10.

Spacing 1 opposite side of lock is equipped with spacing shell fragment 3, and spacing shell fragment 3 divide into shell fragment linkage segment 10, shell fragment section 11 and crotch section 9, and shell fragment linkage segment 10 and shell fragment section 11 slope set up, and inclination is 45.

The elastic sheet connecting section 10 of the limiting elastic sheet 3 is connected with the other side of the lock catch 5 of the limiting lock 1.

Example 3. A high-low temperature compensation mechanism of a circuit breaker is shown in figures 1-7 and comprises a limiting lock 1, wherein the limiting lock 1 is connected with a limiting compensation piece 2, and the limiting compensation distance a between the limiting compensation piece 2 and the limiting lock 1 is 0.4 mm.

Spacing lock 1 includes locking plate 4 and the hasp 5 of slope setting, spacing compensation distance a is the distance between spacing compensation piece 2 and the hasp 5. The inclination angle of the locking plate 4 and the lock catch 5 is 9 degrees.

Spacing compensating blade 2 divide into linkage segment 6, spacing section 7 and extension section 8, linkage segment 6 is connected with the one end of spacing lock 1, spacing compensation distance an is the distance between spacing section 7 and hasp 5.

Spacing section 7 sets up with the linkage segment 6 slope, and inclination is 15.

Spacing 1 opposite side of lock is equipped with spacing shell fragment 3, and spacing shell fragment 3 divide into shell fragment linkage segment 10, shell fragment section 11 and crotch section 9, and shell fragment linkage segment 10 and shell fragment section 11 slope set up, and inclination is 40.

The elastic sheet connecting section 10 of the limiting elastic sheet 3 is connected with the other side of the lock catch 5 of the limiting lock 1.

Example 4. A high-low temperature compensation mechanism of a circuit breaker is shown in figures 1-7 and comprises a limiting lock 1, wherein the limiting lock 1 is connected with a limiting compensation piece 2, and the limiting compensation distance a between the limiting compensation piece 2 and the limiting lock 1 is 0.5 mm.

Spacing lock 1 includes locking plate 4 and the hasp 5 of slope setting, spacing compensation distance a is the distance between spacing compensation piece 2 and the hasp 5. The inclination angle of the locking plate 4 and the lock catch 5 is 4 degrees.

Spacing compensating blade 2 divide into linkage segment 6, spacing section 7 and extension section 8, linkage segment 6 is connected with the one end of spacing lock 1, spacing compensation distance an is the distance between spacing section 7 and hasp 5.

Spacing section 7 sets up with the 6 slopes of linkage segment, and inclination is 5.

Spacing 1 opposite side of lock is equipped with spacing shell fragment 3, and spacing shell fragment 3 divide into shell fragment linkage segment 10, shell fragment section 11 and crotch section 9, and shell fragment linkage segment 10 and shell fragment section 11 slope set up, and inclination is 35.

The elastic sheet connecting section 10 of the limiting elastic sheet 3 is connected with the other side of the lock catch 5 of the limiting lock 1.