A high-speed conductive slip ring applicable to multiple working conditions

Abstract

The present invention discloses a high-speed conductive slip ring applicable to multiple working conditions, including a conductive slip ring. The conductive slip ring includes an inner shaft assembly, an intermediate ring, and an outer ring assembly coaxially installed from the inside to the outside in sequence. The inner shaft assembly includes an inner shaft and a first brush assembly. A first brush assembly wire is arranged between the first brush assembly and the inner shaft. The outer ring assembly includes an outer ring and a second brush assembly. A second brush assembly wire is arranged between the second brush assembly and the outer ring. The intermediate ring includes an inner tapered sleeve and an outer tapered sleeve. The inner tapered sleeve is rotationally connected to the inner shaft, and the outer tapered sleeve is rotationally connected to the outer ring. The intermediate ring is provided with a wire. Through the structure of double-sided loop and multi-flange arrangement, the present invention can ensure the circuit transmission between three rotating parts with the same axis, improve the overall applicable range of the slip ring, and enable it to more flexibly apply to the field of high-speed rotating equipment with complex working conditions.

Description

Technical Field

[0001] The present invention relates to a conductive slip ring, and particularly to a high-speed conductive slip ring applicable to various working conditions. Background Art

[0002] A conductive slip ring is a precision key component for realizing power transmission and signal transmission between two relatively rotating devices. It can avoid wire winding during operation, so it is widely used in high-speed precision fields such as high-speed railways, aviation, and ships. The slip rings on the market can only meet the working requirements under specific working conditions. Once the working conditions change, other types of slip rings need to be replaced, and it is impossible to simultaneously meet the working requirements under the following several working conditions: First, when the rotation directions of the two connected devices are the same and the rotation speed is too high, the wear rate of the brushes and collector rings in the slip ring is high and the service life is short; Second, the existing slip rings do not have an in-ring shunt function. When two circuits need to be grounded, or when the same voltage supply is required at the same time, two ring channels need to be occupied, and it is impossible to use one path for transmission in the ring; Third, the traditional slip ring is a circuit transmission between two static and dynamic components, and it cannot meet the circuit transmission between three rotating parts with the same axis; Fourth, the current slip rings cannot meet the circuit transmission between two devices with opposite rotation directions and a large speed difference.

[0003] The patent with the application number 202121197525.0 discloses a double-layer columnar conductive slip ring. In this structure, although the installation problem of the supporting equipment is solved, when the two circuits of the equipment need to be supplied with the same voltage, it is easy to cause multi-channel occupation or the need to set up external terminals again, making the mechanism installation too complicated. When the rotation directions of the two connected devices are opposite and the speed difference is large, the existing slip rings cannot meet its technical requirements, which will cause the equipment to malfunction.

[0004] The patent with the application number 202123106932 discloses a multi-layer conductive slip ring structure. The surface of its conductive chute is a smooth plane, and the brush wire structure is in the shape of an 'eight'. When the slip ring is running, the brush wire is prone to relative slip with its electric chute, and this slip will cause the signal transmission of the conductive slip ring to fail. There is no electrical connection between the inner and outer groups of slip rings, and it is neither possible to divide one path into multiple paths for transmission nor to adapt to high-speed working conditions. Summary of the Invention

[0005] Object of the Invention: The object of the present invention is to propose a high-speed conductive slip ring applicable to various working conditions, which improves the applicable range of the slip ring.

[0006] Technical solution: The present invention includes a conductive slip ring, which includes an inner shaft assembly, an intermediate ring, and an outer ring assembly coaxially installed from the inside to the outside in sequence. The inner shaft assembly includes an inner shaft and a first brush assembly. A first brush assembly wire is arranged between the first brush assembly and the inner shaft. The outer ring assembly includes an outer ring and a second brush assembly. A second brush assembly wire is arranged between the second brush assembly and the outer ring. The intermediate ring includes an inner conical sleeve and an outer conical sleeve. The inner conical sleeve is rotatably connected to the inner shaft, and the outer conical sleeve is rotatably connected to the outer ring. The intermediate ring is provided with a wire.

[0007] The first brush assembly and the second brush assembly have the same structure, and both include a plurality of slip rings. The plurality of slip rings are fixedly arranged at intervals along the axial direction of the inner shaft on the outer wall of the inner shaft. A plurality of brush wires are annularly arranged on the outer wall of each slip ring, and insulating blocks are connected between adjacent brush wires.

[0008] The brush wires are bent into an arch shape.

[0009] The inner conical sleeve includes metal rings and insulating rings distributed at intervals along the axial direction. A conductive chute is opened on the outer wall of the metal ring along its axial direction, and gaskets are installed in the conductive chutes between adjacent insulating rings.

[0010] The gasket has an S-shaped cross-section, one side is a plane, and the other side is an inclined surface. Among them, the plane is in elastic contact with the metal ring of the inner conical sleeve, and the inclined surface is in elastic contact with the outer conical sleeve. An external wire is provided on the gasket.

[0011] Flange plates are provided at the bottoms of the inner conical sleeve and the outer conical sleeve. The flange plate is connected to the inner conical sleeve together. Screws are provided inside the flange plate, and the ends of the screws extend out of the outside of the flange plate and abut against the outer conical sleeve.

[0012] A toothed ring is provided on the outer circle of the flange plate.

[0013] The second brush assembly is fixed on the inner wall of the outer ring.

[0014] The conductive slip ring can be applied to the following working conditions:

[0015] (1) When the two devices connected by the conductive slip ring rotate in opposite directions and the rotational speeds of the two devices differ greatly, one device is connected to the inner shaft and the other device is connected to the outer ring. At this time, the intermediate ring is locked. The circuit connection method in this working condition is: the input is the inner shaft wire, that is, the first brush assembly wire, and the output is the outer ring wire, that is, the second brush assembly wire. At this time, the intermediate ring wire is idle;

[0016] (2) When the conductive slip ring connects two devices with the same rotation direction and a large speed difference, one device is connected to the inner shaft, and the other device is connected to the outer ring. The flange of the middle ring is driven by gears and rotates at the average speed of the inner and outer rings. In this case, the middle ring rotates. The circuit connection method in this working condition is as follows: The input is the wire of the first brush assembly, the output is the wire of the second brush assembly on the outer ring, and the wire of the middle ring is idle;

[0017] (3) When the conductive slip ring connects two devices, where one device outputs voltage and the other device requires multiple identical voltages for power supply, the rotating device is installed on the inner shaft, and the stationary device is installed on the outer ring or the middle ring. The circuit connection method in this working condition is as follows: The input is the wire of the first brush assembly, and the output is the wire of the middle ring and the wire of the second brush assembly on the outer ring;

[0018] (4) When multiple coaxial rotating devices need to be connected, they are respectively connected to the middle ring, the inner shaft, and the outer ring. The wire channels of multiple devices are interconnected and divided into multiple transmission modes.

[0019] The described transmission modes include:

[0020] Mode 1: Assume that the wire of the inner shaft is the input end, and the wires of the middle ring and the outer ring are the output ends. When different electrical parameters need to be transmitted, all the wires at the input end are used. Several wires of the middle ring are connected to several channels at the input end, then the other channels of the middle ring are idle. A part of the wires of the outer ring are connected to the remaining channels at the input end, then the remaining channels of the outer ring are idle;

[0021] Mode 2: Assume that the wire of the inner shaft is the input end, the wire of the middle ring is the output end, and the wire of the outer ring is idle. At this time, several wires at the input end can be connected to the devices on the middle ring, and the remaining wires are connected to the devices on the outer ring, which can achieve the transmission of the same electrical parameters. Similarly, when the wire of the inner shaft is the input end and the wire of the outer ring is the output end, the wire of the middle ring is idle.

[0022] Beneficial effects:

[0023] (1) In the present invention, the inner and outer conical sleeves of the middle ring have the same taper. The taper increases the contact area, reduces the contact resistance, ensures the coaxiality of the inner and outer conical sleeves. The outer conical sleeve is tightly fitted with the inner conical sleeve under the load applied by the countersunk head screws, forming self-locking, greatly enhancing the conductivity of both sides of the loop. And the stacking and bonding of the metal ring and the plastic ring greatly improve the insulation effect on both sides of each loop;

[0024] (2) An S-shaped gasket is assembled in the built-in and external wire slot of the inner conical sleeve, which is in elastic contact with the outer conical sleeve, preventing the conical sleeve from falling off and ensuring the reliability of conduction;

[0025] (3) The internal terminals of the S-shaped gasket are provided with external conducting wires, and each wire is connected to a loop, enabling the middle loop to function as a busbar for current collection and distribution, solving the problems of multi-channel occupation or the need for external wiring terminals, and greatly enhancing the reliability of the slip ring.

[0026] (4) With the structure of double-sided loops and multi-flange arrangement, the circuit transmission between three rotating parts with the same axis can be ensured, improving the overall applicable range of the slip ring, enabling it to be more flexible in applying to high-speed rotating equipment fields with complex working conditions.

[0027] (5) The arched brush wires can produce elastic deformation, thus ensuring the reliability of electrical contact. When the inner ring rotates at high speed, the brush wires tend to move outward under the action of centrifugal force, further ensuring the reliability of electrical contact, and the performance of the arched brush wires is not affected by the rotation direction. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the present invention;

[0029] Figure 2 is the structural schematic diagram of the inner conical sleeve of the present invention;

[0030] Figure 3 is the structural schematic diagram of the S-shaped gasket of the present invention;

[0031] Figure 4 is the schematic diagram of the brush assembly of the present invention;

[0032] Figure 5 is the external shape schematic diagram of the conductive slip ring of the present invention. Detailed Embodiments

[0033] The present invention will be further described below with reference to the drawings.

[0034] Such as Figure 1 and Figure 5As shown in the figure, the present invention includes an inner shaft assembly, an intermediate ring, and an outer ring assembly coaxially installed from the inside to the outside in sequence. In the same axial cross-section, the loops of the inner shaft assembly, the intermediate ring, and the outer ring assembly are electrically connected. The inner shaft assembly includes an inner shaft 7 and a first brush assembly 11. The first brush assembly 11 is fixed on the outer wall of the inner shaft 7, and a wire groove is provided between the two for laying the first brush assembly wire 114. The first brush assembly wire 114 is connected to the first brush assembly 11 through this wire groove to prevent the wires from being randomly distributed. The intermediate ring includes a flange 2, an inner tapered sleeve 12, and an outer tapered sleeve 4. The inner tapered sleeve 12 is connected to the inner shaft 7 through a bearing. The outer tapered sleeve 4 and the inner tapered sleeve 12 are coaxially sleeved, and the outer wall of the inner tapered sleeve is in close contact with the inner wall of the outer tapered sleeve to form an interference fit. Flanges 2 are provided at the bottoms of the inner tapered sleeve 12 and the outer tapered sleeve 4. A toothed ring is provided on the outer circle of the flange 2, which can be used for driving the intermediate ring. The flange 2 is connected to the inner tapered sleeve 12 through screws 13. Countersunk screws are provided inside the flange 2. Tighten the countersunk screws so that they abut against the outer tapered sleeve 4. By applying a load, the flange 2 and the inner tapered sleeve 12 are tightly fitted to form a self-locking, greatly enhancing the electrical connection of the loops on both sides of the inner tapered sleeve 12 and the outer tapered sleeve 4.

[0035] The outer ring assembly includes a second brush assembly 5 and an outer ring 10. The second brush assembly 5 is fixed on the inner wall of the outer ring 10. A wire groove is provided between the second brush assembly 5 and the outer ring 10 for laying the second brush assembly wire 53. The outer ring 10 is connected to the outer tapered sleeve 4 through a bearing.

[0036] The cross-section of the inner shaft 7 is T-shaped, and its upper part is processed into a flange structure. A rotating bearing 9 is sleeved outside the flange structure. The inner shaft 7 is connected to the outer ring 10 through the rotating bearing 9, thereby ensuring the relative rotation between the inner shaft 7 and the outer ring 10. A bearing cover 6 is installed on the top of the rotating bearing 9. A sealing ring 8 is provided between the bearing cover 6 and the inner shaft 7 to prevent the axial movement of the outer ring of the rotating bearing 9 and ensure its sealing performance.

[0037] The structures of the first brush assembly 11 and the second brush assembly 5 are the same. As Figure 4 shown, both include a plurality of slip rings 111. In this embodiment, nine slip rings 111 are provided. The nine slip rings 111 are evenly fixed on the outer wall of the inner shaft 7 at intervals along the axial direction of the inner shaft 7. Each slip ring 111 is provided with a wire interface, and a plurality of brush wires 113 are arranged in an annular array on its outer wall. Insulating blocks 112 are connected between adjacent two brush wires 113, which not only ensures the insulation effect but also restricts the axial movement of the brush wires 113, greatly improving the reliability of the contact between the brush wires 113 and the conductive chute. When the brush wires slide and contact the conductive chute, their high-speed movement may cause the slip and movement of the brush wires. The insulating blocks 112 connected between the brush wires 113 can ensure the contact between the brush wires 113 and the conductive chute. When the nine brush assemblies are arranged along the axial direction of the inner shaft, the brush wires 113 and the insulating blocks 112 of the brush assemblies are alternately distributed.

[0038] The brush wire 113 is bent into an arch shape. The arched brush wire can produce elastic deformation, thereby ensuring the reliability of electrical contact. When the inner ring rotates at a high speed, the brush wire has a tendency to move outward under the action of centrifugal force, further ensuring the reliability of electrical contact, and the performance of the arched brush wire is not affected by the rotation direction.

[0039] As Figure 2 shown, the inner cone sleeve 12 includes metal rings 123 and plastic rings 122 that are axially spaced apart. Among them, conductive chutes are formed on the outer wall of the metal ring 123 along its axial direction. Gaskets 124 are installed in the conductive chutes between adjacent two plastic rings 122. The gasket 124 has an S-shaped cross-section. As Figure 3 shown, one side of the gasket 124 is a flat surface and the other side is an inclined surface. Among them, the flat surface is in elastic contact with the metal ring of the inner cone sleeve, and the inclined surface is in elastic contact with the outer cone sleeve to prevent the cone sleeve from falling off. A lead screw 125 is installed inside each gasket 124, and an external wire 121 is connected to the lead screw 125. Each external wire 121 is connected to a loop, greatly enhancing the function of slip ring current collection and shunt transmission.

[0040] The structure of the outer cone sleeve 4 is similar to that of the inner cone sleeve 12. The outer cone sleeve 4 also includes a metal ring and a plastic ring. Among them, conductive chutes are formed on the outer wall of the metal ring along its axial direction. The machining taper of the outer cone sleeve 4 is the same as that of the inner cone sleeve 12. During assembly, the metal ring and plastic ring of the outer cone sleeve 4 are respectively in contact and cooperation with the metal ring 123 and plastic ring 122 of the inner cone sleeve 12 in sequence.

[0041] The conductive slip ring of the present invention can be applied to the following working conditions:

[0042] (1) When the conductive slip ring needs to connect two devices, one device rotates forward and the other device rotates backward, and the rotation speeds of the two devices differ greatly, connect one device to the inner shaft and the other device to the outer ring, and at this time the middle ring is locked. The circuit connection method in this working condition is: the input is the inner shaft wire, that is, the wire 114 of the first brush assembly, and the output is the outer ring wire, that is, the wire 53 of the second brush assembly. At this time, the middle ring wire, that is, the external wire 121 on the inner cone sleeve, is idle.

[0043] (2) When the conductive slip ring needs to connect two devices with the same rotation direction but a large speed difference, one device is connected to the inner shaft, and the other device is connected to the outer ring. The flange of the intermediate ring is driven by gears, and the driving speed should be between the speeds of the two devices. At this time, the intermediate ring rotates. Since high-speed rotation will cause the brushes to wear too fast, this can reduce the sliding speed of the two pairs of brushes and ensure their service life. When the inner shaft rotates at a high speed, the brushes of the first brush assembly slide at a high speed with the inner conical sleeve, which is likely to cause wear of the brush wires. When the intermediate ring is driven, its speed is between the speeds of the two devices, reducing the relative sliding speed between the brushes and the inner shaft sleeve and enhancing the service life of the brushes. For example, when the rotational speed of the inner shaft is 3000 rpm and the rotational speed of the outer ring is 0 rpm, if the intermediate ring is not driven, the relative rotational speed between the inner shaft and the intermediate ring is 3000 rpm at this time, which will increase the wear of the brushes. When the intermediate ring is driven to rotate at 1500 rpm, the relative speed between the inner shaft and the intermediate ring is reduced by half. The circuit connection method in this working condition is as follows: the input is the wire 114 of the first brush assembly, the output is the wire 53 of the second brush assembly on the outer ring, and the external wire 121 on the inner conical sleeve is idle.

[0044] (3) When the conductive slip ring needs to connect two devices, and one of the devices outputs voltage while the other device requires two identical voltages for power supply. As Figure 2 can be seen, the nine external wires 121 in this embodiment are nine channels, which is one way. At this time, the rotating device is installed on the inner shaft, and the stationary device can be installed on the outer ring or the intermediate ring. The circuit connection method in this working condition is as follows: the input is the wire 114 of the first brush assembly, and the output is the external wire 121 on the inner conical sleeve and the wire 53 of the second brush assembly on the outer ring, so as to output two identical voltages.

[0045] (4) When three coaxial rotating devices need to be connected, they are respectively connected to the intermediate ring, the inner shaft, and the outer ring. The wire channels of the three devices are interconnected. For example, the first wire of the inner shaft is conducted with the first wire of the intermediate ring and the first wire of the outer ring, and the same is true for the other 8 wires, which are divided into two transmission modes:

[0046] Mode 1: Assume that the wires of the inner shaft are the input terminals, and the wires of the intermediate ring and the outer ring are the output terminals. Then when different electrical parameters need to be transmitted, that is, all 9 wires at the input terminal are used, which are 9 channels. The wires of the intermediate ring need to be connected to the first 3 channels, and the other 6 channels of the intermediate ring are idle. The 6 wires of the outer ring are connected to the remaining 6 channels at the input terminal, and the other 3 channels of the outer ring are idle.

[0047] Mode 2: Assume that the wire of the inner shaft is the input end, the wire of the middle ring is the output end, and the wire of the outer ring is idle. At this time, 3 wires at the input end can be connected to the devices on the middle ring, and the remaining 6 wires can be connected to the devices on the outer ring to achieve the transmission of the same electrical parameters. Similarly, if the wire of the inner shaft is the input end and the wire of the outer ring is the output end, then the wire of the middle ring is idle.

Claims

1. A high-speed conductive slip ring applicable to multiple working conditions, characterized in that It includes a conductive slip ring, which includes an inner shaft assembly, an intermediate ring, and an outer ring assembly coaxially installed from the inside to the outside in sequence. The inner shaft assembly includes an inner shaft and a first brush assembly. A first brush assembly wire is arranged between the first brush assembly and the inner shaft. The outer ring assembly includes an outer ring and a second brush assembly. A second brush assembly wire is arranged between the second brush assembly and the outer ring. The intermediate ring includes an inner conical sleeve and an outer conical sleeve. The inner conical sleeve is rotationally connected to the inner shaft, and the outer conical sleeve is rotationally connected to the outer ring. The intermediate ring is provided with a wire; the outer conical sleeve and the inner conical sleeve are coaxially sleeved, and the outer wall of the inner conical sleeve is in close contact with the inner wall of the outer conical sleeve to form an interference fit; The outer conical sleeve includes a first metal ring and a first plastic ring. The outer conical sleeve and the inner conical sleeve have the same processing taper. The first metal ring and the first plastic ring of the outer conical sleeve are respectively in contact and cooperation with the second metal ring and the second plastic ring of the inner conical sleeve in sequence; The inner conical sleeve includes second metal rings and second plastic rings spaced along the axial direction. A conductive chute is opened on the outer wall of the second metal ring along its axial direction. Gaskets are installed in the conductive chutes between adjacent second plastic rings; the gasket has an S-shaped cross-section, one side is a plane, and the other side is an inclined plane. Among them, the plane is in elastic contact with the second metal ring of the inner conical sleeve, and the inclined plane is in elastic contact with the outer conical sleeve. The gasket is provided with an external wire; flanges are provided at the bottoms of the inner conical sleeve and the outer conical sleeve. The flange is connected to the inner conical sleeve together. Screws are provided inside the flange. The ends of the screws extend outside the flange and abut against the outer conical sleeve. A toothed ring is provided on the outer circle of the flange.

2. The high-speed conductive slip ring applicable to multiple working conditions according to claim 1, characterized in that The first brush assembly includes a plurality of collector rings. The plurality of collector rings are fixedly arranged on the outer wall of the inner shaft at intervals along the axial direction of the inner shaft. A plurality of brush wires are annularly arranged on the outer wall of each collector ring. Insulating blocks are connected between adjacent brush wires.

3. The high-speed conductive slip ring applicable to multiple working conditions according to claim 2, characterized in that, The brush wire is bent into an arch shape.

4. The high-speed conductive slip ring applicable to multiple working conditions according to claim 1, characterized in that, The second brush assembly is fixed on the inner wall of the outer ring.

5. A high-speed conductive slip ring applicable to multiple working conditions according to claim 1, characterized in that The conductive slip ring can be applied to the following working conditions: (1) When the two devices connected by the conductive slip ring rotate in opposite directions and the rotational speeds of the two devices differ greatly, one device is connected to the inner shaft and the other device is connected to the outer ring. At this time, the intermediate ring is locked. The circuit connection method in this working condition is: the input is the inner shaft wire, that is, the first brush assembly wire, and the output is the outer ring wire, that is, the second brush assembly wire. At this time, the intermediate ring wire is idle; (2) When the conductive slip ring connects two devices with the same rotation direction and a large speed difference, one device is connected to the inner shaft and the other device is connected to the outer ring. The flange of the intermediate ring is driven by a gear. At this time, the intermediate ring rotates. The circuit connection method in this working condition is: the input is the first brush assembly wire, and the output is the second brush assembly wire on the outer ring. The intermediate ring wire is idle; (3) When the conductive slip ring connects two devices, one of which outputs voltage and the other device requires multiple identical voltages for power supply, the rotating device is installed on the inner shaft, and the stationary device is installed on the outer ring or the intermediate ring. The circuit connection method in this working condition is: the input is the first brush assembly wire, and the output is the external wire of the intermediate ring and the second brush assembly wire on the outer ring; (4)When multiple coaxial rotating devices need to be connected, they are respectively connected to the middle ring, the inner shaft, and the outer ring. The wire channels of multiple devices are interconnected and are divided into multiple transmission modes.

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