Conductive slip ring physically isolated by multilayer integral rotating labyrinth

Abstract

The invention discloses a multilayer integral rotating labyrinth physical isolation conductive slip ring, which comprises a rotor and a stator, and is characterized in that the rotor comprises a rotating shaft, a plurality of conductive loops fixedly arranged on the rotating shaft, and an inner isolation belt arranged between two adjacent conductive loops; the stator comprises a conductive brush matched with the conductive loop, a fixed wire plate for mounting the conductive brush, a dustproof shell matched with the fixed wire plate and arranged outside the rotating shaft in a sleeving manner, and an outer isolation belt fixedly arranged on the dustproof shell; the dustproof shell and the rotating shaft are connected through a bearing to form a conductive cavity, the inner isolation belt and the outer isolation belt are oppositely arranged and coaxially and relatively rotate through a sliding assembly, the sliding assembly comprises a sliding piece and a sliding groove, and a labyrinth type fit clearance is formed between the sliding piece and the sliding groove; the conductive chamber is divided into independent chambers corresponding to the conductive loops through an outer isolation belt and an inner isolation belt. The slip ring provided by the invention has high insulation reliability, and meanwhile, the phenomenon of discharge among loops in the slip ring can be avoided.

Description

Technical Field

[0001] The invention belongs to the field of conductive slip rings, and in particular relates to a conductive slip ring with multi-layer integral rotating labyrinth physical isolation. Background Art

[0002] Conductive slip rings are widely used in all electromechanical systems that require unlimited, continuous or intermittent 360-degree rotation, and provide multi-channel rotational power, data and signals. They greatly simplify the system structure and avoid twisting of the wires during rotation.

[0003] Conventional conductive slip ring structures, because there is no insulation isolation in most of the space between the loops, will lead to the following problems: (1) The creepage distance between loops is short, the insulation performance is poor, and the insulation performance adaptability in humidity, low pressure or vacuum, high voltage and other environments is poor; (2) After the metal debris generated during the rotation of the slip ring accumulates, discharge is likely to occur between the loops with voltage differences, seriously affecting the safety of the equipment; (3) Mutual electromagnetic interference is likely to occur between loops; The above problems seriously restrict the application scenarios of slip rings and also affect the safety of slip ring use. Summary of the invention

[0004] The object of the present invention is to provide a multi-layer integral rotating labyrinth physically isolated conductive slip ring to solve the isolation problem of most of the space areas between the loops without insulation as mentioned in the background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A multi-layer integral rotating labyrinth physically isolated conductive slip ring comprises a rotor and a stator, wherein the rotor comprises a rotating shaft, a plurality of conductive loops fixedly arranged on the rotating shaft, and an inner isolation belt arranged between two adjacent conductive loops; the stator comprises a conductive brush matched with the conductive loop, a fixed wire plate for mounting the conductive brush, a dustproof shell matched with the fixed wire plate and sleeved outside the rotating shaft, and an outer isolation belt fixedly arranged on the dustproof shell; the dustproof shell and the rotating shaft are connected by a bearing to form a conductive chamber, the inner isolation belt and the outer isolation belt are arranged opposite to each other and coaxially rotate relative to each other through a sliding assembly arranged on opposite sides, the sliding assembly comprises an annular sliding member and a sliding groove matched with the sliding member, and a labyrinth-like matching gap is formed between the sliding member and the sliding groove; the conductive chamber is divided into independent chambers corresponding to each conductive loop by the outer isolation belt and the inner isolation belt.

[0006] Preferably, the sliding member comprises at least one main extension portion which is not arranged axially, and at least one secondary extension portion which is arranged on at least one main extension portion, and the angle between the secondary extension portion and the corresponding main extension portion is not zero.

[0007] Preferably, the sliding member is arranged on the outer isolation belt, and the inner isolation belt includes two connecting rings arranged to cooperate with the two sides of the sliding member, and the two connecting rings cooperate to form a sliding groove on one side close to the sliding member.

[0008] Preferably, the outer isolation belt includes an isolation belt body and a positioning piece extending outside the isolation belt body, and the dustproof shell and / or the fixed wire plate cooperate with the positioning piece to set a limiting portion, and the limiting portion cooperates with the positioning piece to form a sealing ring and its depth is the distance between the isolation belt body and the dustproof shell.

[0009] Preferably, the positioning piece is arranged opposite to the fixed line plate, and the fixed line plate cooperates with the relative positioning piece to arrange a side stop bar for blocking the outer isolation belt from moving axially, and the side stop bar is fixedly connected to the inner side of the fixed line plate.

[0010] Preferably, the dustproof housing cooperates with the positioning piece to set a side stop bar to block the axial movement of the outer isolation belt, and the limiting part is arranged on the fixed line plate, and the arc length of the limiting part is not less than the arc length of the side stop bar.

[0011] Preferably, there are two positioning members which are arranged opposite to each other, and the dustproof shell is provided with side baffles to cooperate with each positioning member; the distance between adjacent baffles on both sides is not less than the length of the positioning member; there are two fixed line plates which are arranged opposite to each other, and each fixed line plate is fixed with a limiting portion.

[0012] Preferably, both ends of the dustproof housing are provided with outer receiving grooves, both ends of the rotating shaft are provided with inner receiving grooves, and two bearings are respectively arranged between the inner receiving groove and the outer receiving groove at the same end.

[0013] Preferably, the rotating shaft is provided with a fixing groove, and the conductive loop is fixedly disposed in the fixing groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, an outer isolation zone and an inner isolation zone are provided in each conductive loop to perform all-round spatial isolation, and a sliding member and a sliding groove are provided between the outer isolation zone and the inner isolation zone to cooperate to form a labyrinth gap, thereby greatly increasing the insulation isolation length and creepage distance between each loop, thereby achieving high insulation reliability of the slip ring, and at the same time, it can also resist the discharge phenomenon between each loop with a voltage difference after the accumulation of wear debris generated during the rotation of the slip ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the conductive slip ring of Example 1.

[0016] Figure 2 for Figure 1 Front view of.

[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure.

[0018] Figure 4 for Figure 3 A partial enlarged view of .

[0019] Figure 5 This is a structural schematic diagram of the outer isolation zone.

[0020] Figure 6 for Figure 5 Assembly relationship diagram of the outer isolation belt and the limiting part.

[0021] Figure 7 This is a schematic diagram of the second structure of the outer isolation zone.

[0022] Figure 8 for Figure 7 Assembly relationship diagram of the outer isolation belt and the limiting part.

[0023] Fig. 9 This is an exploded view of a conductive slip ring.

[0024] Fig.10 for Fig. 9 Assembly relationship diagram of the outer isolation belt and the limiting part.

[0025] Fig.11 This is a front view of the outer isolation zone in Example 2.

[0026] Fig.12 This is a front view of the first dustproof housing in Example 2.

[0027] Fig.13 This is a front view of the second dustproof housing in Example 2.

[0028] Fig.14 An enlarged view of the sliding assembly.

[0029] Fig.15 For use Fig.13 Exploded view of the conductive slip ring in the dustproof housing.

[0030] Figure numerals: 1. rotating shaft; 2. conductive loop; 3. inner isolation belt; 4. conductive brush; 5. fixed wire plate; 6. dustproof shell; 7. outer isolation belt; 100. independent chamber; 8. sliding assembly; 81. sliding part; 82. sliding groove; 800. fitting clearance; 300. connecting ring; 71. isolation belt body; 72. positioning part; 73. limiting part; 9. side guard bar. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. Example

[0032] Reference Figure 1 A multi-layer integral rotating labyrinth physically isolated conductive slip ring comprises a rotor and a stator. The rotor comprises a rotating shaft 1, a plurality of conductive loops 2 fixedly arranged on the rotating shaft 1, and an inner isolation belt 3 arranged between two adjacent conductive loops 2. The stator comprises a conductive brush 4 matched with the conductive loop 2, a fixed wire plate 5 for installing the conductive brush 4, a dustproof shell 6 matched with the fixed wire plate 5 and sleeved on the outside of the rotating shaft 1, and an outer isolation belt 7 fixedly arranged on the inner side of the dustproof shell 6.

[0033] In this embodiment, two conductive brushes 4 are provided and arranged opposite to each other on the left and right sides. The fixed wire plates are provided with two left and right ones corresponding to the conductive brushes 4. The dustproof shell 6 respectively opens wire plate mounting grooves for the two fixed wire plates 5. The fixed wire plates 5 can be fixedly set in the wire plate mounting grooves of the dustproof shell 6. The dustproof shell 6 and the fixed wire plates 5 form an integral dust cover about the rotating shaft 1.

[0034] In this embodiment, both ends of the dustproof shell 6 are provided with outer receiving grooves, and both ends of the rotating shaft 1 are provided with inner receiving grooves. Two bearings are respectively arranged between the inner receiving groove and the outer receiving groove at the same end. The dustproof shell 6 and the rotating shaft 1 are rotatably connected through these two bearings. In addition, the dustproof shell 6 and the rotating shaft 1 are connected with the bearings and combined with the fixed wire plate 5 to form a conductive chamber. The conductive loop 2, the conductive brush 4, the inner isolation belt 3, and the outer isolation belt 7 are all arranged in the conductive chamber.

[0035] Reference Figure 2-3 As shown, in this embodiment, the rotating shaft 1 is provided with a fixed groove, and three conductive loops 2 are fixedly arranged in the fixed groove at equal intervals. The conductive brushes 4 on each fixed line plate 5 are arranged corresponding to the three conductive loops 2. The arrangement relationship between the conductive loops 2 and the conductive brushes 4 is common knowledge in the art and will not be described in detail here. The outer isolation belt 7 and the inner isolation belt 3 are both annular, and the outer isolation belt 7 is relatively arranged outside the inner isolation belt 3. By arranging two groups of isolation pairs consisting of the inner isolation belt 3 and the outer isolation belt 7 in the conductive chamber, it is divided into three independent chambers, and each conductive loop 2 is correspondingly arranged in an independent chamber 100.

[0036] In the present invention, a sealed independent chamber 100 is provided for each conductive loop 2 to ensure the insulation performance of the conductive slip ring. Even in a harsh environment, the insulation performance has good adaptability. In addition, the electromagnetic interference between the two loops can be isolated.

[0037] In the present invention, a sliding assembly 8 consisting of a sliding member 81 and a sliding groove 82 is provided between the outer isolation zone 7 and the inner isolation zone 3 in each isolation pair, so as to realize the coaxial relative rotation of the inner isolation zone 3 and the outer isolation zone 7; the sliding member 81 includes at least one non-axially arranged main extension part, at least one secondary extension part arranged on at least one main extension part, and the angle between the secondary extension part and the corresponding main extension part is not 0. In the present invention, the inner and outer isolation zones 7 are relatively rotated by the clearance fit between the sliding member 81 and the sliding groove 82, and the labyrinth-like clearance 800 increases the creepage distance, thereby preventing the creepage phenomenon from occurring between the conductive loops 2.

[0038] Reference Figure 4 As shown, in this embodiment, the sliding member 81 includes a main extension portion arranged radially and a secondary extension portion arranged on the main extension portion and arranged axially. The sliding member 81 is annular and arranged on the inner side of the outer isolation zone 7, and the sliding groove 82 is arranged on the outer side of the inner isolation zone 3. The inner isolation zone 3 is composed of two connecting rings 300 arranged opposite to each other in the axial direction, and the two connecting rings 300 cooperate to form a sliding groove 82 on one side relative to the outer connecting ring 300. By setting the inner isolation zone 3 into two connecting rings 300 and cooperating with the sliding member 81 to set the sliding groove 82, it is convenient to install the inner isolation zone 3 and the outer isolation zone 7. At the same time, the connecting rings 300 are arranged on both sides of the sliding member 81 to realize the axial limit of the outer isolation zone 7 to prevent its axial movement. Of course, the sliding member 81 can also be arranged on the outer side of the inner isolation zone 3. In this case, the sliding groove 82 is arranged on the inner side of the outer isolation zone 7. Those skilled in the art can set it according to actual conditions.

[0039] In the present invention, the outer isolation belt 7 includes an isolation belt body 71 and a positioning member 72 arranged on the outer side of the isolation belt body 71 along the circumferential direction thereof, and the dustproof housing 6 and / or the fixed line plate 5 cooperate with the positioning member 72 to set a limiting portion 73, and the limiting portion 73 cooperates with the positioning member 72 to form a sealing ring, and its depth is the distance between the isolation belt body 71 and the dustproof housing 6, that is, the difference between the inner diameter of the dustproof housing 6 and the outer diameter of the isolation belt body 71. In this way, under the joint action of the inner isolation belt 3, the isolation belt body 71, and the sealing ring, a 360° seal can be achieved, thereby realizing the separation of the conductive chamber to form an independent chamber 100.

[0040] like Figure 5-6 As shown, the positioning member 72 is strip-shaped and is provided with two, and the two positioning members 72 are arranged opposite to each other; two limiting portions 73 are provided on the dustproof housing 6, and each limiting portion 73 abuts against the corresponding side of the two positioning members 72. Figure 7-8 As shown, the limiting portion 73 can also be arranged inside the fixed line plate 5. Figure 9-10The positioning member 72 is strip-shaped and is provided with four, and four limiting portions 73 are provided to cooperate with the positioning member 72, and the four limiting portions 73 are respectively provided on the dustproof housing 6 and the fixed line plate 5. In the present invention, the number of the positioning member 72 can be one or more, and those skilled in the art can set it according to actual conditions. The number and installation position of the limiting portions 73 are determined by the positioning member 72.

[0041] In this embodiment, it should be noted that the outer isolation zone 7 has been positioned in the axial direction under the setting of the sliding component 8 and will not move forward and backward relative to the inner isolation zone 3, so no other components are set here for axial positioning.

[0042] In the present invention, Fig. 9 For example, the outer isolation belt 7 will be assembled to the outside of the inner isolation belt 3 of the rotor through the sliding assembly 8. At this time, the inner isolation belt 3 and the outer isolation belt 7 cannot move relative to each other forward and backward. The rotor equipped with the outer isolation belt 7 is inserted into the dustproof shell 6. At this time, the outer isolation belt 7 is fixed under the action of the positioning member 72 and the limit portion 73 and cannot rotate. After the rotor is connected to the dustproof shell 6 through the bearing, the two fixed wire plates 5 with conductive brushes 4 are fixedly installed in the left and right wire plate mounting grooves respectively to form a multi-layer integral rotating maze physically isolated conductive slip ring. Example

[0043] This embodiment improves the embodiment 1. The stator further includes an axial positioning component for limiting the axial movement of the outer isolation belt 7. The axial positioning component includes two side baffles 9 arranged opposite to each other in the front and rear. The side baffles 9 can be arranged on the inner side of the fixed wire plate 5. For example, when the outer isolation belt 7 is Figure 5 As shown, and the assembly relationship is Figure 6 As shown, by providing two side baffles 9 for each positioning member 72 on the fixed line plate 5 , the axial fixation of the outer isolation belt 7 can be achieved; of course, the side baffles 9 can also be provided on the dustproof housing 6 .

[0044] When the side baffle 9 is disposed on the dustproof housing 6 , the limiting portion 73 is disposed on the fixed line plate 5 , and the arc length of the limiting portion 73 is greater than or equal to the arc length of the side baffle 9 .

[0045] like Fig.11 In this embodiment, the outer isolation belt 7 includes an isolation belt body 71 and two oppositely arranged positioning members 72 arranged on the outer side wall of the isolation belt body 71. A notch is arranged on the outer isolation belt 7 at a position corresponding to the limiting portion 73 to install the limiting portion 73; Fig.12 The two side baffles 9 are respectively arranged front and back and only correspond to one of the positioning members 72 for limiting. The arc length d2 of the limiting portion 73 is less than or equal to the length d1 of the notch, so as to facilitate the installation of the outer isolation belt 7. Fig.13As shown, if two side blocking strips 9 are provided for each positioning member 72 , the distance d4 between adjacent side strips cannot be less than the arc length d3 of the positioning member 72 , otherwise the outer isolation strip 7 cannot be installed.

[0046] In the present invention, regardless of whether the outer isolation belt 7 can be axially fixed by the sliding assembly 8, the outer isolation belt 7 can be axially fixed by providing the axial positioning installation assembly, thereby expanding its application scope.

[0047] For example, refer to Fig.14 , when the sliding member 81 includes a radially arranged main extension portion and two axially arranged secondary extension portions, the main extension portion is arranged corresponding to the inner edge of the outer isolation belt 7, the cross-section of the sliding member 81 is an inverted F-shape, and the corresponding cross-section of the outer side of the inner isolation belt 3 is an inverted F-shape to form a sliding groove 82 that cooperates with the sliding limiter. At this time, the outer isolation belt 7 cannot be axially positioned by the setting of the sliding assembly 8. The outer isolation belt 7 will be assembled to the outer side of the inner isolation belt 3 of the rotor through the sliding assembly 8, but at this time the outer isolation belt 7 can move axially, and the rotor equipped with the outer isolation belt 7 is inserted into the dustproof housing 6, as shown Fig.15 As shown, during the insertion process, the positioning piece 72 in the outer isolation belt 7 should correspond to the mounting groove of the fixed wire plate 5; after being inserted into the corresponding position, the rotor is rotated so that each positioning piece 72 is arranged between the front and rear baffles of the corresponding axial positioning mounting assembly to complete the axial fixation of the outer isolation belt 7; after the rotor is connected to the dustproof shell 6 through the bearing, the two fixed wire plates 5 with the conductive brushes 4 are fixedly installed in the upper and lower wire plate mounting grooves respectively. At this time, the limiting portion 73 arranged on the inner side of the fixed wire plate 5 is arranged between the two positioning pieces 72 to abut the positioning piece 72 to limit the rotation of the outer isolation belt 7, and the limiting portion cooperates with the positioning piece 72 to form a 360° isolation ring, which cooperates with the isolation pair to realize the separation of the conductive cavity.

[0048] Furthermore, the inner isolation zone and the outer isolation zone are both made of anti-electromagnetic interference materials.

[0049] Compared with the problem of mutual electromagnetic interference between loops due to lack of isolation in traditional conductive slip rings, the present invention limits the isolation tape to anti-electromagnetic interference material on the basis of using inner and outer isolation tapes for isolation, thereby improving the ability of each cavity to resist mutual electromagnetic interference, and having good anti-electromagnetic interference ability even between high-frequency loops and high-voltage loops.

[0050] In the present invention, the 360-degree labyrinth-type physical isolation slip ring structure of the conductive slip ring is designed with a unique and ingenious rotary process, which greatly simplifies the processing and installation difficulty of the isolation cavity and reduces the cost. Moreover, the slip ring can be designed with a multi-cavity structure by using this structural form, which solves the installation and processing and installation process problems of the 360° closed cavity, greatly improves the feasibility of the product process, thereby increasing the product reliability and safety, and also greatly enhances the environmental range of the slip ring application, especially in the fields of aerospace, high voltage, high frequency, etc.

Claims

1. A multi-layer integrated rotating labyrinth physically isolated conductive slip ring, comprising a rotor and a stator, characterized in that: The rotor includes a rotating shaft, a plurality of conductive loops fixedly arranged on the rotating shaft, and an inner isolation belt arranged between two adjacent conductive loops; the stator includes a conductive brush matched with the conductive loop, a fixed wire plate for installing the conductive brush, a dustproof shell matched with the fixed wire plate and sleeved outside the rotating shaft, and an outer isolation belt fixedly arranged on the dustproof shell; the dustproof shell and the rotating shaft are connected by a bearing to form a conductive chamber, the inner isolation belt and the outer isolation belt are arranged opposite to each other and coaxially rotate relative to each other through a sliding assembly arranged on opposite sides, the sliding assembly includes an annular sliding member and a sliding groove matched with the sliding member, and a labyrinth-like matching gap is formed between the sliding member and the sliding groove; the conductive chamber is divided into independent chambers corresponding to each conductive loop by the outer isolation belt and the inner isolation belt.

2. A multi-layer integral rotating labyrinth physically isolated conductive slip ring as claimed in claim 1, characterized in that: The sliding member comprises at least one main extension portion which is not axially arranged, and at least one secondary extension portion which is arranged on at least one main extension portion, and the angle between the secondary extension portion and the corresponding main extension portion is not zero.

3. A multi-layer integral rotating labyrinth physically isolated conductive slip ring as claimed in claim 2, characterized in that: The sliding member is arranged on the outer isolation belt, and the inner isolation belt comprises two connecting rings arranged on both sides of the sliding member, and the two connecting rings cooperate with one side close to the sliding member to form a sliding groove.

4. A multi-layer integral rotating labyrinth physically isolated conductive slip ring as claimed in any one of claims 1 to 3, characterized in that: The outer isolation belt includes an isolation belt body and a positioning piece extending outside the isolation belt body. The dustproof shell and / or the fixed line plate cooperate with the positioning piece to set a limiting portion. The limiting portion cooperates with the positioning piece to form a sealing ring and its depth is the distance between the isolation belt body and the dustproof shell.

5. A multi-layer integral rotating labyrinth physically isolated conductive slip ring as claimed in claim 4, characterized in that: The positioning piece is arranged opposite to the fixed line plate, and the fixed line plate cooperates with the relative positioning piece to arrange a side block bar for blocking the outer isolation belt from moving along the axial direction, and the side block bar is fixedly connected to the inner side of the fixed line plate.

6. A multi-layer integrated rotating labyrinth physically isolated conductive slip ring as claimed in claim 4, characterized in that: The dustproof housing cooperates with the positioning piece to set a side stop bar to block the axial movement of the outer isolation belt. The limiting part is set on the fixed line plate, and the arc length of the limiting part is not less than the arc length of the side stop bar.

7. A multi-layer integrated rotating labyrinth physically isolated conductive slip ring as claimed in claim 5, characterized in that: There are two positioning members which are arranged opposite to each other, and the dustproof shell is provided with side baffles to cooperate with each positioning member; the distance between the adjacent baffles on both sides is not less than the length of the positioning member; there are two fixed line plates which are arranged opposite to each other, and each fixed line plate is fixed with a limiting part.

8. The multi-layer integral rotating labyrinth physically isolated conductive slip ring according to claim 1, characterized in that: Both ends of the dustproof housing are provided with outer receiving grooves, both ends of the rotating shaft are provided with inner receiving grooves, and two bearings are respectively arranged between the inner receiving groove and the outer receiving groove at the same end.

9. The multi-layer integral rotating labyrinth physically isolated conductive slip ring according to claim 1, characterized in that: The rotating shaft is provided with a fixing groove, and the conductive loop is fixedly arranged in the fixing groove.

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