CN113782284B - High-power cement resistor for frequency converter - Google Patents
High-power cement resistor for frequency converter Download PDFInfo
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- CN113782284B CN113782284B CN202111141628.XA CN202111141628A CN113782284B CN 113782284 B CN113782284 B CN 113782284B CN 202111141628 A CN202111141628 A CN 202111141628A CN 113782284 B CN113782284 B CN 113782284B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
- H01C1/084—Cooling, heating or ventilating arrangements using self-cooling, e.g. fins, heat sinks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/034—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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Abstract
The utility model relates to a high power cement resistance for converter, including the top offer the shell of placing the square groove, be located the elastic resistance area of placing the square groove and the closing cap of butt in the shell top, it is provided with the guide post team to coil in the square groove to place, the guide post team includes a plurality of guide post rows and connects the steering column of adjacent guide post row head and the tail, the steering column is located the turn department of guide post team, the guide post row comprises a plurality of guide post, the guide post interval sets up, elastic resistance area butt is in the same one side of guide post team, the closing cap includes apron and a plurality of guide post that set up in the apron bottom, the guide post is located in each guide post row between adjacent guide post and can move between adjacent guide post, the guide post butt in elastic resistance area and with the crooked elastic resistance area of adjacent guide post cooperation, heat-resistant cement has been filled in the square groove. This application has the good effect of heat dissipation.
Description
Technical Field
The application relates to the field of cement resistors, in particular to a high-power cement resistor for a frequency converter.
Background
The cement resistor is made up by winding a resistor on a non-alkaline heat-resistant porcelain, fixing the resistor with the protection of heat-resistant, moisture-resistant and corrosion-resistant materials, placing the wound resistor in a square porcelain frame, and filling and sealing with special non-combustible heat-resistant cement. The cement resistor applied to the frequency converter is not so high in current when the frequency converter is started, and the resistor is connected to the frequency converter to play a role in limiting current in order to protect the frequency converter. The cement resistor is generally divided into a common cement resistor and a winding cement resistor, and for the winding cement resistor, a resistance wire on the winding resistor is usually wound on a square porcelain frame in turns. The inventors have found that the wound cement resistor-forming arrangement is susceptible to burning out when the ambient temperature is high and ventilation is poor.
Disclosure of Invention
In order to improve the heat dissipation effect, the application provides a high-power cement resistor for a frequency converter and a processing method.
In a first aspect, the application provides a high-power cement resistor for a frequency converter, which adopts the following technical scheme:
the utility model provides a high power cement resistance for converter, its characterized in that, includes that the top sets up the shell of placing the square groove, is located the elastic resistance area of placing the square groove and the closing cap of butt in the shell top, it meanders to be provided with the guide post team to place the square groove, the guide post team includes a plurality of guide post rows and connects the steering column of adjacent guide post row head and the tail, steering column is located the turn department of guide post team, the guide post row comprises a plurality of guide post, the guide post interval sets up, elastic resistance takes the butt in the same one side of guide post team, the closing cap includes apron and a plurality of guide post that set up in the apron bottom, the guide post is located between the adjacent guide post in each guide post row and can move between adjacent guide post, the guide post butt in elastic resistance area and with the crooked elastic resistance area of adjacent guide post cooperation, heat-resistant cement has been poured into in placing the square groove.
Through adopting above-mentioned technical scheme, the metal band that the elastic resistance area was made for the metal that has certain resistance, its surface is smooth. Because the sheetmetal has better elasticity after the bending, will be tensioned around locating between direction pillar and the guide post to whole expression is similar to the shape of S-shaped, and the elastic resistance area monolithic setting in the shell and the elastic resistance area alternate segregation between the different sections can not contact and form the closed loop, and heat-resisting cement fully contacts with the elastic resistance area, so that the heat that the elastic resistance area produced can be transmitted to on the heat-resisting cement fast, thereby avoids burning out the elastic resistance area. In addition, through a proper process, the elastic resistance bands can be nested at the bending parts of the adjacent guide post arrays, and the convex surface of one guide post array is embedded into the concave surface of the adjacent guide post array, so that the space in the placing square groove is effectively utilized, the length of the elastic resistance bands in the placing square groove is improved, and the elastic resistance bands can bear stronger current and ensure better heat dissipation effect when used on a frequency converter.
During the equipment, can cover the position of closing cap at the top of shell and adjustment earlier for the elastic resistance area is by the centre gripping between guide post and guide post row, then promotes the apron, and the guide post promotes the elastic resistance area and slides along the guide post, makes the elastic resistance area crooked and by the tensioning, thereby has improved the length of placing the interior elastic resistance area of square groove, and has guaranteed that elastic resistance area and heat-resistant cement fully contact. In the related art, the elastic resistance bands are usually arranged in parallel in the shell, but the length of the resistance wire in the single cement resistor is insufficient, and the resistance wire is inconvenient to tightly wind. If a plurality of guide support columns are fixed in the placing square groove in an array mode, and the elastic resistance bands are sequentially wound on the guide support columns and the steering support columns, workers are difficult to rapidly bend the elastic resistance bands on the discontinuous parallel guide support columns and the steering support columns during manual operation.
In conclusion, the high-power cement resistor for the frequency converter can be conveniently produced, and has good heat dissipation effect and high-power resistance when in use.
Preferably, the adjacent guide post arrays are arranged in parallel, and the guide struts of each guide post array are combined to form a square matrix.
By adopting the technical scheme, when the elastic resistance belt is bent by the guide columns, the bending shapes of the elastic resistance belt on the adjacent guide column rows are similar and the positions of the elastic resistance belt are corresponding, and the elastic resistance belt can be better nested at the bending parts of the adjacent guide column rows, so that the space in the square groove is effectively utilized.
Preferably, the bottom of placing the square groove is provided with a plurality of guiding grooves, the guiding grooves correspond to the guiding columns one to one, the two ends of each guiding groove are respectively a guiding starting point for embedding the guiding column and a guiding end point for fixing the guiding column, the guiding grooves penetrate through the guiding column rows and are located on the different sides of the guiding column rows, the guiding columns are in sliding connection with the guiding grooves, a first position correcting groove for embedding the guiding column is formed in the guiding end point of the guiding groove at the bottom of the placing square groove, and the first position correcting groove is the same as the guiding groove in the forming direction.
Through adopting above-mentioned technical scheme, the guiding groove produces the guide effect to the guide post for the guide post can slide along the guiding groove, will imbed first alignment groove when the guide post slides the guide terminal point of guiding groove, thereby makes the apron butt in the top surface of shell.
Preferably, the relative both sides of apron bottom all are provided with one row of direction slider, and two rows of direction sliders are parallel to each other and each row of direction slider all includes the direction slider that two intervals set up, the second alignment groove has all been seted up in the relative both sides of placing the square groove at the shell top, each the direction slider inlays respectively in the second alignment groove of difference, the degree of depth and the direction slider looks adaptation in second alignment groove.
Through adopting above-mentioned technical scheme, when the guide post slided at the guide slot, the direction slider will synchronous movement, until the first positioning groove of guide post embedding, the direction slider also imbeds in the second positioning groove to make the apron butt in the top surface of shell.
Preferably, the groove width of the second calibration groove is matched with the guide sliding block, the guide sliding block slides in the second calibration groove and is in sliding connection with the second calibration groove, a liquid injection channel penetrates through the outer side wall of the shell, and the liquid injection channel penetrates through one end of the second calibration groove and is communicated with the placement square groove.
Preferably, the number of the liquid injection channels is four and the liquid injection channels are evenly distributed on two opposite outer side walls of the shell, two ends of the second calibration groove are respectively a start position and a sliding end position, the start position is a start position at which the guide sliding block slides into the second calibration groove, and the liquid injection channels all penetrate through the sliding end position.
Through adopting above-mentioned technical scheme, when the direction slider just got into the second position groove, the direction slider was arranged in the initiating position, and notes liquid passageway was in the intercommunication state this moment, and the apron butt seals the opening of placing the square groove in shell top, and heat-resistant cement can follow and annotate the liquid passageway and pour into and place the square groove. Because two in the notes liquid channel are located the same side in elastic resistance area, and two are located the opposite side in addition, therefore when pouring into heat-resisting cement from a notes liquid channel of elastic resistance area one side, the air can be discharged from another notes liquid channel of homonymy. After the injection is finished, the sealing cover continues to slide, so that the guide column reaches the sliding end position, the guide sliding block blocks the liquid injection channel at the moment, and the liquid injection channel is prevented from leaking.
Preferably, the top of the shell is provided with guide sliding grooves for the guide sliding blocks to be embedded into the square grooves, and the guide sliding grooves are arranged in parallel.
By adopting the technical scheme, the guide sliding groove enables the sealing cover to slide in the top of the shell according to a determined direction, so that the flexible metal strip is bent better, and the guide sliding block can accurately enter the starting position of the second calibration groove.
Preferably, the guide sliding groove is a square groove, the guide sliding block is a square column, the second calibration groove is a square groove, and the width of the second calibration groove is the same as that of the guide sliding groove.
Through adopting above-mentioned technical scheme, the direction slider can smoothly slide on direction spout and direction slider.
Preferably, a lead slit from which the elastic resistance band is led out is provided on a side surface of the case, and the lead slit fixes and encapsulates the elastic resistance band by epoxy resin.
By adopting the technical scheme, the elastic resistance band is fixed on the shell by the epoxy resin and the shell is sealed.
In a second aspect, the application provides a method for processing a high-power cement resistor for a frequency converter, which adopts the following technical scheme:
a processing method of a high-power cement resistor for a frequency converter comprises the following steps:
s1, an elastic resistance band penetrates through a lead slit, is wound along a guide column team and is tensioned on the same side of the guide column team;
s2, aligning and embedding the guide sliding block to the guide sliding groove;
s3, the cover plate is pushed along the opening direction of the guide sliding groove until the guide sliding block moves to the tail end of the guide sliding groove, the guide column pushes and bends the elastic resistance band along the guide groove to tension the elastic resistance band, and the elastic resistance band is adjusted to be filled into the placing square groove from the lead slit;
s4, pressing the guide sliding block into the starting position of the second calibration groove, enabling the guide column to enter the first calibration groove, and enabling the cover plate to abut against the top surface of the shell;
s5, injecting refractory mortar into the placing square groove from the two liquid injection channels on the two opposite sides of the shell until the refractory mortar overflows from the other two liquid injection channels;
s6, pushing the guide sliding block to slide to the sliding end position of the second positioning groove so as to block the liquid injection channel;
s7, injecting epoxy resin into the lead slit, and injecting the epoxy resin into the liquid injection channel, so that the cement resistor is packaged.
Drawings
FIG. 1 is a schematic diagram of a high power cement resistor for a frequency converter according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a cement resistor with an inner structure shown by separating a housing from a cover in an embodiment of the present application.
Fig. 3 is a schematic diagram of a cement resistor hiding cover to show the internal structure of the cement resistor in one embodiment of the present application.
Fig. 4 is a schematic structural diagram of a closure in an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a cement resistor when a guide sliding block is embedded into a guide sliding groove in an embodiment of the present application.
FIG. 6 is a schematic structural diagram of a cement resistor in an embodiment of the present application when a guide sliding block is embedded in a second calibration slot and located at the end of sliding.
Description of reference numerals:
1. a housing; 11. placing a square groove; 12. a guide column team; 121. a guide post row; 1210. a guide pillar; 122. a steering column; 13. a guide groove; 131. a guidance starting point; 132. guiding a terminal point; 14. a first alignment slot; 15. a second positioning groove; 151. a start bit; 152. sliding the end position; 16. a liquid injection channel; 17. a guide chute; 18. a lead slit;
2. an elastic resistance band;
3. sealing the cover; 31. a cover plate; 32. a guide post; 33. and a guide slide block.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a high power cement resistor for a frequency converter. Referring to fig. 1 and 2, the cement resistor comprises a housing 1 with a square placing groove 11 at the top, an elastic resistance band 2 installed in the square placing groove 11, and a cover 3 installed on the housing 1, wherein the cover 3 is used for closing the opening of the square placing groove 11 and bending the elastic resistance band 2, and heat-resistant cement is poured in the square placing groove 11.
Referring to fig. 2 and 3, a guide post pair 12 is provided in the placement square groove 11, and the guide post pair 12 is arranged in a meandering manner. The guide column pair 12 includes a plurality of guide column rows 121 and steering columns 122 connecting the head and the tail of the adjacent guide column rows 121, the adjacent guide column rows 121 may be arranged in parallel or in an inclined manner, and in this embodiment, the adjacent guide column rows 121 are parallel to each other and have equal intervals. The guide column rows 121 are composed of a plurality of guide columns 1210 arranged at intervals, the adjacent guide columns 1210 are arranged at equal intervals, in this embodiment, the guide columns 1210 and the housing 1 are formed by integrally firing ceramic materials, the length of the guide columns 1210 is the same as the depth of the placing square groove 11, and the guide columns 1210 of each guide column row 121 are combined to form a square matrix. The steering support column 122 is located at the turning point of the guide column pair 12, that is, between the steering support columns 122 at the end portions of two adjacent guide column arrays 121, in the present embodiment, the steering support column 122 and the steering support columns 122 at the end portions of two adjacent guide column arrays 121 form a triangle, and the steering support column 122 is located outside the square matrix formed by combining the guide column arrays 121. The steering column 122 and the housing 1 are integrally formed by firing a ceramic material, and the length of the steering column 122 is smaller than or equal to the depth of the square accommodating groove 11, and in the present embodiment, the length of the steering column 122 is equal to the depth of the square accommodating groove 11.
Referring to fig. 4, the cover 3 includes a cover plate 31, two rows of guide sliders 33 disposed on opposite sides of a bottom surface of the cover plate 31, and a guide post 32 disposed in a middle portion of the bottom surface of the cover plate 31, the two rows of guide sliders 33 being parallel to each other. Each row of guide sliders 33 comprises two guide sliders 33 arranged at intervals, and in the embodiment, the two guide sliders 33 of the same row of guide sliders 33 are respectively close to the opposite ends of the cover plate 31. Referring to fig. 2 and 3, the top of the housing 1 is provided with guide sliding grooves 17 for the guide sliding blocks 33 to be embedded into the sliding on two opposite sides of the square groove 11, the two guide sliding grooves 17 are arranged in parallel, and the width of each guide sliding groove 17 is matched with the corresponding guide sliding block 33. The guide sliding groove 17 is a square groove, the guide sliding block 33 is a square column, and when the guide sliding block 33 is located in the guide sliding groove 17, the guide sliding groove 17 is connected with the guide sliding block 33 in a sliding mode.
Referring to fig. 3 and 5, a plurality of second positioning slots 15 are formed in the guide sliding slot 17, the depth of the guide sliding slot 17 is smaller than that of the second positioning slots 15, the opening direction of the second positioning slots 15 is the same as that of the guide sliding slot 17, each second positioning slot 15 corresponds to one guide slider 33, each guide slider 33 is embedded in a different second positioning slot 15, in the present embodiment, the number of the second positioning slots 15 in the guide sliding slot 17 is two and is distributed at two opposite ends of the guide sliding slot 17, the slot width of the second positioning slot 15 is equal to the slot width of the guide sliding slot 17, and the slot width of the second positioning slot 15 is matched with the guide sliders 33, that is, the distance from the slot bottom of the second positioning slot 15 to the top surface of the housing 1 is equal to the length of the guide sliders 33, when the bottom surface of the cover plate 31 abuts against the top surface of the housing 1, the guide sliders 33 in the second positioning slot 15 will abut against the slot bottom of the second positioning slot 15. Specifically, the second positioning groove 15 is a square groove, and the guide slider 33 is slidably connected to the second positioning groove 15 when being positioned in the second positioning groove 15. The two ends of the second positioning slot 15 are respectively a start position 151 and a sliding end position 152, the start position 151 is a start position at which the guide slider 33 slides into the second positioning slot 15, and the sliding end position 152 is an end of the second positioning slot 15 far away from the start position 151.
The lateral wall of the housing 1 is provided with four liquid injection channels 16, the liquid injection channels 16 are equally distributed on two opposite lateral walls of the housing 1, and the liquid injection channels 16 penetrate through the sliding end 152 and are communicated with the placing square groove 11.
Referring to fig. 3 and 5, the guide pole pair 12 is a continuous line including two continuous sides, and the elastic resistance band 2 is wound around the guide pole pair 12 and abuts on one side of the guide pole pair 12. The side surface of the case 1 is provided with a lead slit 18 from which the elastic resistance band 2 is drawn, and the lead slit 18 is sealed by fixing the elastic resistance band 2 with epoxy resin.
In the placing square groove 11, the length of the guide post 32 is larger than the groove depth of the placing square groove 11. The guide posts 32 are located between adjacent guide posts 1210 in each guide post row 121 and can move between the adjacent guide posts 1210, the bottom of the placing square groove 11 is provided with a plurality of guide grooves 13 corresponding to the guide posts 32, two ends of each guide groove 13 are respectively a guide starting point 131 for embedding the guide posts 32 and a guide terminal point 132 for fixing the guide posts 32, the guide grooves 13 penetrate through the guide post rows 121, and the guide starting points 131 and the guide terminal points 132 are located on different sides of the guide post rows 121. The width of the guide groove 13 is adapted to the guide post 32, and the guide post 32 is slidably connected to the guide groove 13 when the guide post 32 is in the guide groove 13. The groove bottom of the placing square groove 11 is provided with a first calibration groove 14 for the guide column 32 to be embedded in at the guide end point 132 of the guide groove 13, the opening direction of the first calibration groove 14 is the same as that of the guide groove 13, and when the guide column 32 is positioned in the first calibration groove 14, the guide column 32 is in sliding connection with the first calibration groove 14. The guide posts 32 abut the elastic resistive band and cooperate with the adjacent guide posts 1210 to bend the elastic resistive band.
Fig. 5 is a schematic structural diagram of a cement resistor when a guide slider is inserted into a guide chute, and referring to fig. 5, during assembly, a cover plate 31 may be covered on the top of a housing 1 first, and the position of a cover 3 is adjusted, so that the guide slider 33 is inserted into the guide chute 17, and the elastic resistance band 2 is clamped between a guide post 32 and a guide post row 121, and at this time, a certain gap exists between the cover plate 31 and the housing 1, and people can observe the state of the elastic resistance band 2 in the housing 1 through the gap. Then, the cover plate 31 is pushed, the guide sliding grooves 17 play a role in guiding the guide sliders 33, the guide grooves 13 play a role in guiding the guide posts 32, the guide sliders 33 slide along the guide sliding grooves 17, the guide posts 32 slide along the guide grooves 13, and the guide posts 32 push the elastic resistance bands 2 to slide along the guide pillars 1210, so that the elastic resistance bands 2 are bent and tensioned, and the length of the elastic resistance bands 2 in the square placing grooves 11 is increased. The bending shapes of the elastic resistance bands 2 on the adjacent guide post columns 121 are similar and the positions of the elastic resistance bands 2 are corresponding, so that the elastic resistance bands 2 can be nested in the bending positions of the adjacent guide post columns 121 better, and the space utilization rate is improved.
Fig. 6 is a schematic structural view of the cement resistor when the guide slider is inserted into the second calibration slot and positioned at the end of sliding, and referring to fig. 6, when the guide post 32 slides to the guide end point 132 of the guide slot 13, the guide slider 33 will be inserted into the first calibration slot 14, and when the guide slider 33 slides to the start point 151 of the second calibration slot 15, the guide post 32 will abut against the bottom of the first calibration slot 14, the guide slider 33 will abut against the bottom of the second calibration slot 15, the bottom of the cover plate 31 will abut against the top of the housing 1, and the opening of the placement square slot 11 is closed. When the guide slider 33 just enters the second positioning groove 15, the guide slider 33 is located in the start position 151, the liquid injection channel 16 is in a communication state, the cover plate 31 abuts against the top of the housing 1 and closes the opening of the placing square groove 11, and the heat-resistant cement can be injected into the placing square groove 11 from the liquid injection channel 16. Because two of the injection channels 16 are located on the same side of the elastic resistance band 2 and the other two are located on the other side, when the heat-resistant cement is injected from one injection channel 16 on one side of the elastic resistance band 2, air can be discharged from the other injection channel 16 on the same side. After the injection is finished, the cover 3 is continuously slid, so that the guide column 32 reaches the sliding end 152, and at the moment, the guide sliding block 33 blocks the injection channel 16, thereby avoiding the leakage of the injection channel 16. Finally, epoxy is injected into the lead slots 18 and into the injection channels 16, thereby encapsulating the cement resistor.
The embodiment of the application also discloses a processing method of the high-power cement resistor for the frequency converter, which comprises the following steps:
s1, an elastic resistance band 2 penetrates through a lead slit 18, and is wound and tensioned on the same side of a guide column team 12 along the guide column team 12;
s2, aligning and embedding the guide sliding block 33 to the guide sliding groove 17;
s3, the cover plate 31 is pushed along the opening direction of the guide sliding groove 17 until the guide sliding block 33 moves to the tail end of the guide sliding groove 17, the guide column 32 pushes and bends the elastic resistance band 2 along the guide groove 13, and the elastic resistance band 2 is adjusted to be supplemented into the placing square groove 11 from the lead slit 18;
s4, pressing the guide sliding block 33 into the starting position 151 of the second positioning groove 15, enabling the guide column 32 to enter the first positioning groove 14, and enabling the cover plate 31 to abut against the top surface of the shell 1;
s5, pouring refractory mortar into the placing square groove 11 from the two liquid injection channels 16 on the two opposite sides of the shell 1 until the refractory mortar overflows from the other two liquid injection channels 16;
s6, pushing the guide sliding block 33 to slide to the sliding end 152 of the second positioning groove 15 so as to block the liquid injection channel 16;
s7, injecting epoxy resin into the lead slit 18, and injecting the epoxy resin into the liquid injection channel 16, so as to package the cement resistor.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a high power cement resistance for converter, its characterized in that, including the top offer place shell (1) of square groove (11), be located place elastic resistance area (2) in square groove (11) and butt in closing cap (3) at shell (1) top, it is provided with guide post team (12) to place the sinuous in square groove (11), guide post team (12) include a plurality of guide post columns (121) and connect steering column (122) of adjacent guide post column (121) head and the tail, steering column (122) are located the turn department of guide post team (12), guide post column (121) comprise a plurality of guide post (1210), guide post (1210) interval sets up, elastic resistance area (2) butt is in the same one side of guide post team (12), closing cap (3) include apron (31) and a plurality of guide post (32) that set up in apron (31) bottom, guide post (32) are located between the adjacent guide post (1210) of each guide post column (121) and can be in the adjacent guide post (1210) and the adjacent resistance area (1210) and the crooked cooperation of cement resistance area (1210), the adjacent guide post (1210 have the heat-resistant area (1210) and pour into the heat resistance area (1210) and the cooperation.
2. The high-power cement resistor for the frequency converter according to claim 1, wherein a plurality of guide grooves (13) are formed in the bottom of the placing square groove (11), the guide grooves (13) correspond to the guide columns (32) one by one, two ends of each guide groove (13) are respectively a guide starting point (131) for embedding the guide column (32) and a guide ending point (132) for fixing the guide column (32), the guide grooves (13) penetrate through the guide column array (121), the guide starting points (131) and the guide ending points (132) are located on different sides of the guide column array (121), the guide columns (32) are connected with the guide grooves (13) in a sliding manner, a first aligning groove (14) for embedding the guide column (32) is formed in the guide ending point (132) of the guide groove (13) at the bottom of the placing square groove (11), and the first aligning groove (14) and the guide grooves (13) are formed in the same direction.
3. The high-power cement resistor for the frequency converter according to claim 2, wherein a row of guide sliders (33) is arranged on each of two opposite sides of the bottom of the cover plate (31), the two rows of guide sliders (33) are parallel to each other, each row of guide sliders (33) comprises two guide sliders (33) arranged at intervals, the top of the housing (1) is provided with second calibration slots (15) on two opposite sides of the placing square groove (11), each guide slider (33) is embedded in a different second calibration slot (15), and the depth of each second calibration slot (15) is adapted to the corresponding guide slider (33).
4. The high power cement resistor for frequency converter according to claim 3, characterized in that the width of the second calibration slot (15) is adapted to the guiding slider (33), the guiding slider (33) slides in the second calibration slot (15) and is connected with the second calibration slot (15) in a sliding manner, the outer side wall of the housing (1) is provided with a liquid injection channel (16) in a penetrating manner, and the liquid injection channel (16) passes through one end of the second calibration slot (15) and is communicated with the placing square groove (11).
5. The high power cement resistor for frequency converter according to claim 4, characterized in that the number of the liquid injection channels (16) is four and is divided on two opposite outer side walls of the housing (1), the two ends of the second calibration slot (15) are respectively a start position (151) and a sliding end position (152), the start position (151) is a start position for the guiding slide block (33) to slide into the second calibration slot (15), and the liquid injection channels (16) are both passed through the sliding end position (152).
6. The high-power cement resistor for the frequency converter according to claim 5, wherein a guide sliding groove (17) for a guide sliding block (33) to be embedded and slide is opened at the top of the housing (1) at two opposite sides of the placing square groove (11), the two guide sliding grooves (17) are arranged in parallel, the second positioning groove (15) is positioned in the guide sliding groove (17), and the depth of the guide sliding groove (17) is smaller than that of the second positioning groove (15).
7. The high power cement resistor for frequency converters according to claim 6, characterized in that the guiding runner (17) is a square groove, the guiding slider (33) is a square column, the second indexing groove (15) is a square groove, the width of the second indexing groove (15) and the width of the guiding runner (17) are the same.
8. The high-power cement resistor for the frequency converter according to claim 7, characterized in that the side of the casing (1) is provided with a lead slit (18) for leading out the elastic resistance band (2), and the lead slit (18) is fixed and encapsulated with the elastic resistance band (2) through epoxy resin.
9. The high power cement resistor for frequency converters according to claim 1, characterized in that adjacent guide post arrays (121) are arranged in parallel, and the guide posts (1210) of each guide post array (121) are combined to form a square matrix.
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| CN202111141628.XA CN113782284B (en) | 2021-09-28 | 2021-09-28 | High-power cement resistor for frequency converter |
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| CN202111141628.XA CN113782284B (en) | 2021-09-28 | 2021-09-28 | High-power cement resistor for frequency converter |
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| CN113782284B true CN113782284B (en) | 2022-11-29 |
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|---|---|---|---|---|
| JP2009038275A (en) * | 2007-08-03 | 2009-02-19 | Koa Corp | Cement resistor |
| JP2019160980A (en) * | 2018-03-13 | 2019-09-19 | ミクロン電気株式会社 | Cement resistor |
| CN109841362A (en) * | 2019-02-15 | 2019-06-04 | 广东福德电子有限公司 | A kind of cement resistor |
| CN211507249U (en) * | 2020-03-31 | 2020-09-15 | 常州市南方电器元件厂有限公司 | Cement resistor |
| CN212322753U (en) * | 2020-05-19 | 2021-01-08 | 蚌埠市欧利特电子科技有限公司 | Heat dissipation cement resistor |
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| CN113782284A (en) | 2021-12-10 |
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