Welding-free mounting structure of high-power brake resistor

Abstract

The invention discloses a welding-free mounting structure of a high-power brake resistor, which comprises a flange plate, a resistance rod, a gasket and a locking nut, and a through hole in the flange plate is divided into a hole upper section, a hole middle section and a hole lower section along the axial direction; the resistor rod penetrates into the through hole and is in attached connection with the inner wall of the upper hole section, and gaps are respectively formed between the resistor rod and the inner walls of the middle hole section and the lower hole section; the gasket is arranged between the flange plate and the resistance rod, the locking nut is arranged outside the resistance rod in a sleeving mode and is in threaded connection with the lower hole section, and one end of the locking nut can be inserted into an insertion groove in one end of the gasket so that the two side walls of the insertion groove can tightly abut against the inner wall of the lower hole section and the outer wall of the resistance rod respectively; and the other end of the gasket is tightly inserted between the inner wall of the middle section of the hole and the outer wall of the resistance rod. The welding-free mounting structure is good in sealing and waterproof effect, is less influenced by an operation space, is easy to operate, improves the working safety, the assembly efficiency and the assembly quality of the brake resistor, and ensures the volume miniaturization of the brake resistor.

Description

Technical Field

[0001] The invention relates to the technical field of resistors, and in particular to a welding-free installation structure of a high-power braking resistor. Background Art

[0002] The brake resistor is a carrier used to consume the regenerative energy of the motor in the form of heat energy. The water-cooled brake resistor uses water cooling to cool the brake resistor. Currently, water-cooled brake resistors have been widely used in ships, crane ships, oil rigs, and various types of power applications.

[0003] At present, the following assembly methods are usually used when processing and assembling water-cooled brake resistors: Figure 1 and attached Figure 2 As shown, several resistor rods 2 are first welded to the flange 1 one by one using argon arc welding equipment, and then several resistor rods 2 are inserted into the container body 6, and then the flange 1 is sealed and fixedly connected to one end of the container body 6 using argon arc welding equipment. It can be understood that in order to realize water cooling of the resistor rods 2, the container body 6 is also provided with water inlet and outlet joints. However, as the application scenarios have higher and higher requirements for high power and high voltage of water-cooled brake resistors, the density of resistor rods in water-cooled brake resistors is also increasing accordingly, that is: under the premise that the flange installation area remains unchanged, the number of resistor rods is increasing; this causes the above-mentioned argon arc welding processing method to not be well implemented, and it is easy to have defects such as leaking welding and false welding, resulting in the sealing and waterproofing effect of the water-cooled brake resistor not meeting the standards, which has an adverse effect on the normal operation of the water-cooled brake resistor.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the present invention provides a welding-free installation structure of a high-power braking resistor. On the one hand, the structure is simple, reasonable, and novel, and the sealing and waterproof effect is good, which greatly improves the working safety of the braking resistor and extends its service life; on the other hand, it is less affected by the operating space and is easy to operate and implement, which effectively improves the assembly efficiency and assembly quality of the braking resistor and well ensures the miniaturization of the braking resistor.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a welding-free installation structure of a high-power brake resistor, comprising a flange, a resistor rod, a gasket and a locking nut, wherein the flange is provided with a stepped through hole, and the through hole is sequentially divided into an upper hole section, a middle hole section and a lower hole section along its axial direction; the resistor rod is inserted into the through hole, and the outer wall of the resistor rod is fitted and connected with the inner wall of the upper hole section, and a gap is formed between the outer wall of the resistor rod and the inner walls of the middle hole section and the lower hole section respectively; the gasket is arranged in the through hole, and the outer wall of the resistor rod is connected with ... gasket is arranged in the through hole, and the gasket is arranged in the through hole, and the gasket is arranged in the through hole, and the gasket is arranged in the through hole, and the gasket is arranged in the through hole, and the gasket is arranged in the through hole, A slot is formed between the flange and the resistor rod and at one end of the gasket facing away from the upper section of the hole; the locking nut is sleeved on the outside of the resistor rod and is threadedly connected to the inner wall of the lower section of the hole; one end of the locking nut can also be inserted into the slot to open the slot and press the opposite side walls of the slot tightly against the inner wall of the lower section of the hole and the outer wall of the resistor rod respectively, while also driving the gasket to be tightly inserted into the gap between the inner wall of the middle section of the hole and the outer wall of the resistor rod at one end facing the upper section of the hole.

[0007] As a further improvement of the present invention, an embedding groove is concavely provided on the inner wall of the upper section of the hole, and a sealing ring is installed in the embedding groove.

[0008] As a further improvement of the present invention, when the resistor rod is inserted into the through hole, the resistor rod, the upper hole section, the middle hole section and the lower hole section are arranged with the same central axis.

[0009] As a further improvement of the present invention, the upper section of the hole and the lower section of the hole are both cylindrical through-hole structures, and the inner diameter of the upper section of the hole is smaller than the inner diameter of the lower section of the hole; the middle section of the hole is a truncated cone through-hole structure, and one end of the middle section of the hole is smoothly connected to one end of the upper section of the hole, and a step portion A is formed between the other end of the middle section of the hole and one end of the lower section of the hole.

[0010] As a further improvement of the present invention, the axial lengths of the upper hole section and the middle hole section are both smaller than the axial length of the lower hole section;

[0011] An internal thread section for threaded connection with the locking nut is formed on the inner wall of one end of the lower hole section facing away from the middle hole section.

[0012] As a further improvement of the present invention, the resistance rod is provided with a rod body in the shape of a cylinder, and the rod body penetrates into the through hole.

[0013] As a further improvement of the present invention, a plurality of through holes are provided at intervals on the flange; correspondingly, a plurality of resistance rods are also provided and are inserted into the plurality of through holes one by one.

[0014] As a further improvement of the present invention, the gasket is an integrated structure made of Teflon material.

[0015] As a further improvement of the present invention, based on the state in which the gasket is arranged between the flange and the resistor rod, the gasket is divided into an upper ring section and a lower ring section in sequence along the axial direction of the through hole, the inner wall of the upper ring section matches the shape of the resistor rod and can be fitted and connected with the outer wall of the resistor rod, the outer wall of the upper ring section matches the shape of the inner wall of the middle section of the hole and can be fitted and connected with the inner wall of the middle section of the hole; the outer wall of the lower ring section protrudes from the outer wall of the upper ring section to form a step portion B that cooperates with the step portion A for stopping, and the end of the lower ring section facing away from the upper ring section is provided with the slot having an inverted U-shaped ring groove structure.

[0016] As a further improvement of the present invention, an inclined surface is formed on both the inner and outer side walls of one end of the locking nut, so that one end of the locking nut is formed into a pointed end;

[0017] The outer wall of the locking nut is also provided with an external thread section for threaded connection with the inner wall of the lower section of the hole.

[0018] The beneficial effects of the present invention are as follows: 1) The welding-free installation structure of the present invention can achieve at least two seals, namely: ① The opposite side walls of the slot are pressed tightly against the inner wall of the lower section of the hole and the outer wall of the resistor rod through the locking nut, thereby achieving the first seal; ② The end of the gasket facing the upper section of the hole is tightly inserted into the gap between the inner wall of the middle section of the hole and the outer wall of the resistor rod through the locking nut, thereby achieving the second seal; Therefore, the sealing and waterproof effect achieved by the welding-free installation structure of the present invention is very good, thereby greatly improving the working safety of the brake resistor and extending its service life. 2) Compared with the argon arc welding processing method used in the prior art, the welding-free installation structure of the present invention is less affected by the installation density of the resistor rod, that is, the welding-free installation structure is less affected by the operating space and is easy to operate and implement; This not only effectively improves the assembly efficiency and assembly quality of the brake resistor, but also well ensures the miniaturization of the brake resistor. 3) The welding-free installation structure of the present invention is simple, reasonable, novel, low in manufacturing cost, and is conducive to production implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of a water-cooled brake resistor in the prior art;

[0020] Figure 2 for Figure 1 The structural diagram of the resistor rod shown in;

[0021] Figure 3 It is a partial structural schematic diagram of the welding-free installation structure of the high-power braking resistor of the present invention (for the convenience of clear description, only one resistor rod is shown);

[0022] Figure 4 for Figure 3 The cross-sectional structure diagram of the solder-free installation structure of the high-power brake resistor shown;

[0023] Figure 5 for Figure 4 The enlarged structural diagram of the A part is shown in FIG.

[0024] Figure 6 for Figure 3 The structural diagram of the flange shown in FIG.

[0025] Figure 7 for Figure 6 The enlarged schematic diagram of the cross-sectional structure of the flange shown;

[0026] Figure 8 for Figure 5 A schematic diagram of the three-dimensional structure of the gasket shown in ;

[0027] Fig. 9 for Figure 8 An enlarged schematic diagram of the cross-sectional structure of the gasket shown;

[0028] Fig.10 for Figure 5 A schematic diagram of the three-dimensional structure of the locking nut shown in FIG.

[0029] Fig.11 for Fig.10 An enlarged schematic diagram of the cross-sectional structure of the locking nut is shown.

[0030] Combined with the accompanying drawings, the following description is given:

[0031] 1. Flange; 10. Perforation; 100. Upper section of hole; 101. Middle section of hole; 102. Lower section of hole; 103. Groove; 104. Step A; 105. Internal thread section; 2. Resistor rod; 20. Rod body; 21. Terminal block; 22. Plug; 3. Washer; 30. Slot; 31. Upper section of ring; 32. Lower section of ring; 33. Step B; 4. Lock nut; 40. External thread section; 41. Tip; 42. Friction section; 5. Sealing ring; 6. Container body. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] Please see attached Figure 3 To Attachment Fig.11As shown, this embodiment 1 provides a welding-free installation structure of a high-power brake resistor, which includes a flange 1, a resistor rod 2, a gasket 3 and a locking nut 4, wherein the flange 1 is provided with a stepped through hole 10, and the through hole 10 is divided into an upper hole section 100, a middle hole section 101 and a lower hole section 102 in sequence along its axial direction. It can be understood that the upper hole section 100, the middle hole section 101 and the lower hole section 102 are mutually connected; the resistor rod 2 is inserted into the through hole 10, and the outer wall of the resistor rod 2 is fitted and connected with the inner wall of the upper hole section 100, and the outer wall of the resistor rod 2 is respectively formed with the inner walls of the middle hole section 101 and the lower hole section 102. The washer 3 is arranged in the gap between the flange 1 and the resistor rod 2, and a slot 30 is formed at one end of the washer 3 facing away from the upper hole section 100; the locking nut 4 is sleeved on the outside of the resistor rod 2 and is threadedly connected to the inner wall of the lower hole section 102, and one end of the locking nut 4 can also be inserted into the slot 30 to open the slot 30 and press the opposite side walls of the slot 30 tightly against the inner wall of the lower hole section 102 and the outer wall of the resistor rod 2 respectively, while also driving the washer 3 to be tightly fitted toward one end of the upper hole section 100 and inserted into the gap between the inner wall of the middle hole section 101 and the outer wall of the resistor rod 2. As can be seen from the above, on the one hand, the welding-free installation structure described in this embodiment can achieve at least two seals, namely: ① The opposite side walls of the slot 30 are pressed tightly against the inner wall of the lower hole section 102 and the outer wall of the resistor rod 2 through the locking nut 4, thereby achieving the first seal; ② The end of the gasket 3 facing the upper hole section 100 is tightly inserted into the gap between the inner wall of the middle hole section 101 and the outer wall of the resistor rod 2 through the locking nut 4, thereby achieving the second seal; Therefore, the sealing and waterproof effect achieved by the welding-free installation structure described in this embodiment is very good, thereby greatly improving the working safety of the brake resistor and extending its service life. On the other hand, compared with the argon arc welding processing method used in the prior art, the welding-free installation structure described in this embodiment is less affected by the installation density of the resistor rod, that is, the welding-free installation structure is less affected by the operating space and is easy to operate and implement; This not only effectively improves the assembly efficiency and assembly quality of the brake resistor, but also well ensures the miniaturization of the brake resistor.

[0035] The specific structure of the solder-free installation structure of the high-power brake resistor described in this embodiment is described in detail below.

[0036] First, about the sealing degree.

[0037] As can be seen from the above, the welding-free installation structure of this embodiment can achieve two seals through the combination of the flange 1, the resistor rod 2, the gasket 3 and the locking nut 4. However, in order to further improve the sealing and waterproof effect / level of the welding-free installation structure, this embodiment 1 also provides a third seal, namely: Figure 4 To Attachment Figure 7 As shown, in this embodiment 1, a groove 103 is recessed on the inner wall of the hole upper section 100, and a sealing ring 5 is installed in the groove 103. It can be understood that the sealing ring 5 can be tightly abutted against the outer wall of the resistor rod 2, achieving a third seal.

[0038] Next, the shape of the through hole 10 in the flange 1 is described.

[0039] In order to achieve the above three seals, the through hole 10 in the present embodiment 1 preferably adopts a stepped hole structure, and the through hole 10 is divided into an upper hole section 100, a middle hole section 101 and a lower hole section 102 in sequence along its axial direction, that is, the through hole 10 is divided into three sections of holes; and according to product design requirements, the above three sections of holes preferably adopt an implementation structure as follows: Please continue to refer to the attached Figure 7 As shown, the upper hole section 100 and the lower hole section 102 are both cylindrical through-hole structures, the middle hole section 101 is a truncated cone through-hole structure, and one end of the middle hole section 101 is smoothly transitionally connected to one end of the upper hole section 100, and a step portion A104 is formed between the other end of the middle hole section 101 and one end of the lower hole section 102. It can be understood that the inner diameter of the upper hole section 100 is smaller than the inner diameter of the lower hole section 102. Further, in order to adapt to the installation of the gasket 3 and the locking nut 4, and to reduce the thickness of the flange 1 as much as possible, this embodiment 1 also preferably controls the axial lengths of the upper hole section 100 and the middle hole section 101 to be smaller than the axial length of the lower hole section 102. In addition, in order to cooperate with the threaded connection of the locking nut 4, the present embodiment 1 also forms an internal thread section 105 for threaded connection with the locking nut 4 on the inner wall of one end of the hole lower section 102 facing away from the hole middle section 101.

[0040] Supplementary explanation: This embodiment 1 does not impose any restrictions on the specific structure of the resistor rod 2, and a commonly used resistor rod structure in the prior art can be adopted, such as: Figure 2 As shown, the resistor rod 2 is provided with a cylindrical rod body 20 and two connection terminals 21 respectively extending out of the axial ends of the rod body 20 through sealing heads 22. Based on the above structure of the resistor rod 2, when the resistor rod 2 is inserted into the through hole 10, it is actually to insert the rod body 20 into the through hole 10, and the connection terminals 21 must be placed outside the flange to avoid contact with water (see the attached Figure 1At the same time, the resistor rod 2 is also arranged with the upper hole section 100, the middle hole section 101 and the lower hole section 102 in a coaxial manner.

[0041] In addition, in the actual production of braking resistors, in order to meet the technical requirements of high power and high voltage of braking resistors, the resistor rods 2 are usually provided in plurality, and correspondingly, the flange 1 is also provided with a plurality of the through holes 10 at intervals, so that the plurality of the resistor rods 2 can be inserted into the plurality of the through holes 10 one by one.

[0042] Next, the structure of the washer 3 and the locking nut 4 will be described.

[0043] Based on the shape of the perforation 10, the preferred implementation structure of the gasket 3 in this embodiment 1 is: Figure 5 , Attachment Figure 8 and attached Fig. 9 As shown, taking the state where the gasket 3 is arranged between the flange 1 and the resistor rod 2 as a reference, the gasket 3 is divided into an upper ring section 31 and a lower ring section 32 in sequence along the axial direction of the through hole 10, wherein the inner wall of the upper ring section 31 matches the shape of the resistor rod 2 and can be fitted and connected with the outer wall of the resistor rod 2 (that is, the inner wall of the upper ring section 31 is an annular plane), and the outer wall of the upper ring section 31 matches the shape of the inner wall of the middle hole section 101 and can be fitted with the middle hole section 101 The inner wall is fitted and connected (that is, the outer wall of the upper ring section 31 is in the shape of an annular slope); the outer wall of the lower ring section 32 protrudes from the outer wall of the upper ring section 31 to form a step portion B33 that cooperates with the step portion A104 to stop (it can be understood that the step portion A104 cooperates with the step portion B33 to limit the displacement of the locking nut 4 pushing the gasket 3), and the end of the lower ring section 32 facing away from the upper ring section 31 is provided with the slot 30 with an inverted U-shaped ring groove structure.

[0044] Furthermore, the gasket 3 in the present embodiment 1 is an integral structure made of Teflon material (polytetrafluoroethylene), that is, the upper ring section 31 and the lower ring section 32 are an integrally formed structure. It is understandable that, because Teflon material has the advantages of high temperature resistance, wear resistance, corrosion resistance, high elasticity, etc., the gasket 3 can present an excellent sealing and waterproof effect under the action / cooperation of the locking nut 4 and the perforation 10, etc., and has a long service life.

[0045] In addition, based on the shape of the through hole 10 and the structure of the washer 3, the preferred implementation structure of the locking nut 4 in this embodiment 1 is: Figure 5 , Attachment Fig.10 and attached Fig.11As shown, the inner and outer side walls of one end of the locking nut 4 are both formed with inclined surfaces, so that one end of the locking nut 4 is formed into a tip 41, which is convenient for inserting one end of the locking nut 4 into the slot 30. In addition, the outer wall of the locking nut 4 is provided with an external thread section 40 for threaded connection with the inner wall of the lower hole section 102 (i.e., the internal thread section 105), and the outer wall of the locking nut 4 is also provided with a friction portion 42 to increase the friction between the outer wall of the locking nut 4 and a tool such as a wrench, so that the operator can screw in the locking nut 4 using a tool such as a wrench.

[0046] In summary, the welding-free installation structure of the high-power braking resistor of the present invention has the advantages of simple, reasonable and novel structure, good sealing and waterproof effect, less influence of operating space, easy operation and implementation, etc., which greatly improves the working safety of the braking resistor and prolongs its service life; it also effectively improves the assembly efficiency and assembly quality of the braking resistor, and well ensures the miniaturization of the braking resistor.

[0047] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A welding-free installation structure for a high-power braking resistor, characterized in that: The invention comprises a flange (1), a resistor rod (2), a gasket (3) and a locking nut (4); the flange (1) is provided with a stepped through hole (10), and the through hole (10) is divided into an upper hole section (100), a middle hole section (101) and a lower hole section (102) in sequence along its axial direction; the resistor rod (2) is inserted into the through hole (10), and the outer wall of the resistor rod (2) is closely connected with the inner wall of the upper hole section (100), and a gap is formed between the outer wall of the resistor rod (2) and the inner walls of the middle hole section (101) and the lower hole section (102); the gasket (3) is arranged between the flange (1) and the resistor rod (2), and ... A slot (30) is formed at one end of the washer (3) facing away from the upper hole section (100); the locking nut (4) is sleeved outside the resistor rod (2) and is threadedly connected to the inner wall of the lower hole section (102); one end of the locking nut (4) can also be inserted into the slot (30) to open the slot (30) and press the opposite side walls of the slot (30) tightly against the inner wall of the lower hole section (102) and the outer wall of the resistor rod (2), while also driving the end of the washer (3) facing the upper hole section (100) to be tightly inserted into the gap between the inner wall of the middle hole section (101) and the outer wall of the resistor rod (2).

2. The solder-free installation structure of a high-power brake resistor according to claim 1, characterized in that: The inner wall of the upper hole section (100) is provided with an embedding groove (103), and a sealing ring (5) is installed in the embedding groove (103).

3. The welding-free installation structure of the high-power braking resistor according to claim 1 is characterized in that: When the resistor rod (2) is inserted into the through hole (10), the resistor rod (2), the upper hole section (100), the middle hole section (101) and the lower hole section (102) are arranged on the same central axis.

4. The welding-free installation structure of the high-power braking resistor according to claim 3 is characterized in that: The upper hole section (100) and the lower hole section (102) are both cylindrical through-hole structures, and the inner diameter of the upper hole section (100) is smaller than the inner diameter of the lower hole section (102); The middle hole section (101) is a truncated cone through-hole structure, and one end of the middle hole section (101) is smoothly transitionally connected to one end of the upper hole section (100), and a step portion A (104) is formed between the other end of the middle hole section (101) and one end of the lower hole section (102).

5. The welding-free installation structure of the high-power braking resistor according to claim 4 is characterized in that: The axial lengths of the upper hole section (100) and the middle hole section (101) are both smaller than the axial length of the lower hole section (102); An internal thread section (105) for threaded connection with the locking nut (4) is also formed on the inner wall of one end of the hole lower section (102) facing away from the hole middle section (101).

6. The welding-free installation structure of a high-power braking resistor according to claim 4 is characterized in that: The resistance rod (2) is provided with a rod body (20) in a cylindrical shape, and the rod body (20) penetrates into the through hole (10).

7. The welding-free installation structure of a high-power braking resistor according to claim 6 is characterized in that: The flange (1) is provided with a plurality of through holes (10) at intervals; correspondingly, the resistance rods (2) are also provided in a plurality and are inserted into the plurality of through holes (10) one by one.

8. The welding-free installation structure of a high-power braking resistor according to claim 1 is characterized in that: The gasket (3) is an integrated structure made of Teflon material.

9. The welding-free installation structure of a high-power braking resistor according to claim 4, characterized in that: Based on the state in which the gasket (3) is arranged between the flange (1) and the resistor rod (2), the gasket (3) is divided into an upper ring section (31) and a lower ring section (32) in sequence along the axial direction of the through hole (10); the inner wall of the upper ring section (31) matches the shape of the resistor rod (2) and can be fitted and connected with the outer wall of the resistor rod (2); the outer wall of the upper ring section (31) matches the shape of the inner wall of the middle hole section (101) and can be fitted and connected with the inner wall of the middle hole section (101); the outer wall of the lower ring section (32) protrudes from the outer wall of the upper ring section (31) to form a step section B (33) that cooperates with the step section A (104) as a stopper; and the end of the lower ring section (32) facing away from the upper ring section (31) is provided with the slot (30) of an inverted U-shaped ring groove structure.

10. The solder-free installation structure of a high-power braking resistor according to claim 1, characterized in that: Inclined surfaces are formed on the inner and outer side walls of one end of the locking nut (4), so that one end of the locking nut (4) is formed into a pointed end; The outer wall of the locking nut (4) is also provided with an external thread section (40) for threaded connection with the inner wall of the lower hole section (102).

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