Liquid slip ring and electrical equipment

Abstract

The utility model provides a liquid slip ring and electrical equipment, and relates to the technical field of slip rings. The liquid slip ring comprises a slip ring main shaft, a slip ring shell and a sealing assembly, the slip ring shell is of a hollow rotary structure with two open ends, the slip ring main shaft is concentrically and rotatably installed in the slip ring shell, the sealing assembly comprises sealing pieces and cushion blocks, and the sealing pieces and the cushion blocks are alternately stacked in the slip ring shell in the axial direction of the slip ring main shaft. And the sliding rings are positioned between the inner wall of the sliding ring shell and the radial outer wall of the sliding ring main shaft. According to the liquid slip ring, the sealing pieces and the cushion blocks are alternately stacked in the slip ring shell to form a sealing structure, the two sealing pieces are separated through the cushion blocks, the sealing pieces can be attached to the slip ring main shaft along the radial outer wall conveniently to achieve sealing of the space between the two sealing pieces, the sealing performance of the liquid slip ring is guaranteed, and the sealing performance of the liquid slip ring is improved. And the sealing pieces and the cushion blocks can be sequentially and alternately arranged in the slip ring shell, so that the installation convenience of the sealing structure in the liquid slip ring is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slip rings, in particular to a liquid slip ring and electrical equipment. Background Art

[0002] Slip rings, also known as rotary electrical interfaces or electrical rotary joints, are electrical components responsible for connecting rotating bodies and transmitting energy and signals. They are mostly used in high-end industrial electrical equipment or precision electronic equipment with multi-function, high performance, high precision, and multiple continuous rotational motion. They are generally composed of a rotatable slip ring spindle that is rotatably installed in a stationary slip ring housing.

[0003] As a kind of slip ring, the liquid slip ring is a unique rotary connector. Its transmission medium is liquid. In the process of transmission through liquid, in order to avoid the stability problem of the liquid slip ring caused by liquid leakage, a sealing gasket is usually installed inside the slip ring housing.

[0004] However, the sealing gasket is usually annular in structure, and a limiting groove is generally provided in the slip ring housing to maintain the stability of the sealing gasket during the operation of the liquid slip ring. The sealing gasket needs to be placed in the limiting groove, which means that the sealing gasket needs to be folded during installation before it can be placed in the slip ring housing and partially embedded in the limiting groove, and then needs to be restored with tools, which makes the installation of the sealing gasket more complicated. The folding can easily cause damage to the sealing gasket, affecting the sealing performance. Utility Model Content

[0005] The problem solved by the utility model is how to improve the installation convenience of the sealing structure inside the liquid slip ring on the basis of ensuring the internal sealing performance of the liquid slip ring.

[0006] In order to solve the above problems, on the one hand, the utility model provides a liquid slip ring, comprising a slip ring main shaft, a slip ring housing and a sealing assembly, wherein the slip ring housing is a hollow rotary structure with openings at both ends, the slip ring main shaft is coaxially rotatably installed in the slip ring housing, and the sealing assembly comprises a sealing member and a gasket, wherein the sealing member and the gasket are alternately stacked in the slip ring housing along the axial direction of the slip ring main shaft, and are both located between the inner wall of the slip ring housing and the radial outer wall of the slip ring main shaft.

[0007] Compared with the prior art, the beneficial effects of the liquid slip ring of the utility model include: a sealing assembly is arranged inside the slip ring housing to replace the combination of the sealing gasket and the limiting groove as a sealing structure, wherein a sealing member and a gasket are arranged to form the sealing assembly, and the sealing member and the gasket are alternately stacked in the slip ring housing along the axial direction of the slip ring main shaft. In this way, the gaskets on both sides of the seal along the axial direction of the slip ring main shaft can cooperate to clamp the seal, or the gasket can cooperate with the inner wall of the slip ring housing to clamp and limit the seal along the axial direction of the slip ring main shaft, thereby realizing the installation of the seal in the slip ring housing. Moreover, the seal and the gasket are both located between the inner wall of the slip ring housing and the radial outer wall of the slip ring main shaft. The gasket separates the two seals, which facilitates the seal to fit the radial outer wall of the slip ring main shaft to achieve sealing of the space between the two seals, thereby ensuring the sealing stability of the liquid slip ring. On this basis, when it is necessary to install the sealing assembly, it can be achieved by alternately placing the seal and the gasket into the slip ring housing in sequence, without the need to fold and adjust the sealing assembly, thereby improving the installation convenience of the sealing structure inside the liquid slip ring while ensuring the internal sealing performance of the liquid slip ring.

[0008] Optionally, the seal and the gasket are both arranged in a ring shape around the axial direction of the slip ring main shaft, the radial inner wall of the seal along the slip ring main shaft is gap-matched with the radial outer wall of the slip ring main shaft, and the radial outer wall of the seal and the gasket along the slip ring main shaft are both arranged in contact with the inner wall of the slip ring housing.

[0009] Optionally, the cushion block is provided with a through hole, the through hole is extended along the radial direction of the slip ring main shaft and passes through the cushion block, the slip ring main shaft is provided with a flow channel with two opening ends respectively located on the axial end face and radial outer wall of the slip ring main shaft, the slip ring housing is provided with a transmission hole, the transmission hole connects the inside and outside of the slip ring housing along the radial direction of the slip ring main shaft and is used for liquid transmission, and the transmission hole is used to communicate with the flow channel through the through hole.

[0010] Optionally, the gasket is provided with liquid grooves on the radial inner wall and outer wall of the slip ring main shaft, and are connected through the through hole. The liquid grooves are arranged in a ring shape around the axial direction of the slip ring main shaft. There are multiple through holes, which are arranged at intervals around the axial direction of the slip ring main shaft.

[0011] Optionally, the slip ring housing has a first open end and a second open end which are arranged opposite to each other along the axial direction of the slip ring main shaft, and an installation groove is provided on the inner wall of the slip ring housing in an annular shape around the axial direction of the slip ring main shaft, and the installation groove penetrates the end surface of the first open end of the slip ring housing along the axial direction of the slip ring main shaft, and the seal and the gasket are alternately stacked and installed in the installation groove along the axial direction of the slip ring main shaft to form a sealing portion, and the sealing assembly also includes a pressure block, which is detachably installed at the first open end and cooperates with the groove wall of the installation groove opposite to the first open end and close to the second open end to clamp the sealing portion.

[0012] Optionally, the pressing block comprises a connecting portion and a clamping portion, the connecting portion is detachably connected to the slip ring housing, and the clamping portion cooperates with a groove wall of the mounting groove to clamp the sealing portion.

[0013] Optionally, the pressing block is arranged in an annular shape around the axial direction of the slip ring main shaft, and the radial inner wall of the pressing block along the slip ring main shaft is gap-matched with the radial outer wall of the slip ring main shaft.

[0014] Optionally, a bearing is provided at the first open end, the bearing sleeve is mounted on the slip ring main shaft, an accommodating groove is provided between the bearing and the mounting groove, the connecting portion is located in the accommodating groove and abuts against the bearing.

[0015] Optionally, the clamping portion is located in the mounting groove or in the accommodating groove.

[0016] On the other hand, the utility model further provides an electrical device, comprising the liquid slip ring as described above.

[0017] Compared with the prior art, the beneficial effects of the electrical equipment of the present invention are the same as those of the liquid slip ring described above, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a liquid slip ring in the prior art;

[0019] Figure 2 This is a comparison diagram of the assembly of the slip ring main shaft and the slip ring housing in the prior art;

[0020] Figure 3 This is a structural diagram of a liquid slip ring in an embodiment of the utility model;

[0021] Figure 4 It is an assembly comparison diagram of the slip ring main shaft and the slip ring housing in the embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1-slip ring main shaft; 11-flow channel; 2-slip ring housing; 21-transmission hole; 22-mounting groove; 23-bearing; 24-accommodating groove; 3-sealing assembly; 31-seal; 32-pad; 321-through hole; 322-liquid groove; 33-pressing block; 331-connecting part; 332-clamping part; 34-countsunk screw; 4-limiting groove; 5-sealing gasket. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] It should be noted that, in the coordinate system XY provided herein, the positive direction of the X axis represents the right, the reverse direction of the X axis represents the left, the positive direction of the Y axis represents the top, and the reverse direction of the Y axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0026] On the one hand, an embodiment of the utility model provides a liquid slip ring, including a slip ring main shaft 1, a slip ring housing 2 and a sealing assembly 3. The slip ring housing 2 is a hollow rotating structure with openings at both ends. The slip ring main shaft 1 is coaxially rotatably installed in the slip ring housing 2. The sealing assembly 3 includes a sealing member 31 and a gasket 32. The sealing member 31 and the gasket 32 ​​are alternately stacked in the slip ring housing 2 along the axial direction of the slip ring main shaft 1, and are located between the inner wall of the slip ring housing 2 and the radial outer wall of the slip ring main shaft 1.

[0027] It should be noted that in the present invention, Figure 1 and Figure 3 As shown, the axial direction of the slip ring main shaft 1 is the X-axis direction, that is, the axial direction of the slip ring housing 2 and the rotation axis direction of the slip ring main shaft 1. The radial direction of the slip ring main shaft 1 is any direction perpendicular to the X-axis direction, that is, the radial direction of the slip ring housing 2. For example, the radial direction of the slip ring main shaft 1 is the Y-axis direction.

[0028] In the prior art, such as Figure 1As shown, the slip ring housing 2 is a hollow rotary structure with openings at both ends, and the slip ring main shaft 1 can be installed in the slip ring housing 2 for concentric rotation. A plurality of sealing gaskets 5 are arranged axially in the slip ring housing 2. The sealing gaskets 5 are arranged in an annular shape and fit with the radial side wall of the slip ring main shaft 1, thereby separating a plurality of liquid flow channels through the spaced sealing gaskets 5. This facilitates the stable flow of liquid between the slip ring main shaft 1 and the slip ring housing 2 during the rotation of the slip ring main shaft 1, while preventing liquid leakage. In order to ensure the sealing stability of the sealing gasket 5 during the rotation of the slip ring main shaft 1, as shown in FIG. Figure 2 As shown, a limiting groove 4 is axially annularly arranged on the inner wall of the slip ring housing 2, and the stability of the sealing gasket 5 is ensured by embedding the sealing gasket 5 in the limiting groove 4. In this way, when installing the sealing gasket 5, the sealing gasket 5 needs to be folded so that it can be placed in the slip ring housing 2 and partially embedded in the limiting groove 4, and then it needs to be restored by a tool so that the sealing gasket 5 is completely embedded in the limiting groove 4 along the circumferential direction. The installation is relatively cumbersome, and the folding can easily cause damage to the sealing gasket 5, affecting the sealing performance. Moreover, when the liquid slip ring is disassembled and adjusted, the sealing gasket 5 is not easy to be taken out from the limiting groove 4. It can only be taken out from the slip ring housing 2 after the sealing gasket 5 is destroyed, and then a new sealing gasket 5 is installed, which not only causes waste, but also further increases the time required for disassembly and adjustment due to the cumbersome installation.

[0029] Therefore, in this embodiment, if Figure 1 As shown, a sealing assembly 3 is arranged inside the slip ring housing 2 to replace the combination of the sealing gasket 5 and the limiting groove 4, wherein a sealing member 31 and a gasket 32 ​​are arranged to form the sealing assembly 3, and the sealing members 31 and the gasket 32 ​​are alternately stacked in the slip ring housing 2 along the axial direction of the slip ring main shaft 1. In this way, the gaskets 32 on both sides of the sealing member 31 along the axial direction of the slip ring main shaft 1 can cooperate to clamp the sealing member 31, or the gasket 32 ​​can cooperate with the inner wall of the slip ring housing 2 to clamp and limit the sealing member 31 along the axial direction of the slip ring main shaft 1, thereby realizing the installation of the sealing member 31 in the slip ring housing 2, and the sealing member 31 and the gasket 32 ​​are both located between the inner wall of the slip ring housing 2 and the radial outer wall of the slip ring main shaft 1, and the gasket 32 ​​separates the two sealing members 31, so that the sealing member 31 and the radial outer wall of the slip ring main shaft 1 are fitted together to realize the sealing of the space between the two sealing members 31, thereby ensuring the sealing stability of the liquid slip ring. On this basis, as Figure 4 As shown, when the sealing assembly 3 needs to be installed and disassembled, it can be achieved by alternately placing the sealing member 31 and the gasket 32 ​​into the slip ring housing 2 or removing them from the slip ring housing 2 in sequence, without the need to fold and adjust the sealing assembly 3, which can effectively improve the convenience of loading and unloading the sealing assembly 3, and further improve the convenience of installing the sealing structure inside the liquid slip ring while ensuring the internal sealing performance of the liquid slip ring.

[0030] It should be noted that, in the present embodiment, the gasket 32 ​​can be detachably connected to the slip ring housing 2 through a detachable connection structure such as a threaded connector or a clamp, so as to achieve stable installation of the seal 31 in the slip ring housing 2. Of course, in other embodiments of the present invention, the gasket 32 ​​can also be directly fixedly connected to the slip ring housing 2 by welding or the like.

[0031] It should be noted that, in this embodiment, Figure 3 or Figure 4 As shown, a gasket 32 ​​and another gasket 32 ​​cooperate to clamp the seal 31 or a gasket 32 ​​and the inner wall of the slip ring housing 2 cooperate to clamp the seal 31 .

[0032] Optionally, the seal 31 and the gasket 32 ​​are both arranged in a ring shape around the axial direction of the slip ring main shaft 1, and the radial inner wall of the seal 31 along the slip ring main shaft 1 is gap-matched with the radial outer wall of the slip ring main shaft 1, and the radial outer wall of the seal 31 and the gasket 32 ​​along the slip ring main shaft 1 are both arranged to fit the inner wall of the slip ring housing 2.

[0033] In this embodiment, if Figure 3 As shown, in order to ensure the sealing performance inside the liquid slip ring, the seal 31 and the gasket 32 ​​are both arranged in an annular shape around the axial direction of the slip ring main shaft 1, and the gasket 32 ​​can separate the two seals 31, and the radial inner wall of the seal 31 along the slip ring main shaft 1 can be fitted with the radial outer wall of the slip ring main shaft 1, so as to seal the space between the two seals 31, and at the same time seal the space between the slip ring main shaft 1 and the slip ring housing 2, effectively improving the sealing performance inside the liquid slip ring, on this basis, the radial outer wall of the seal 31 and the gasket 32 ​​along the slip ring main shaft 1 can be fitted with the inner wall of the slip ring housing 2, and by cooperating with the setting that the seal 31 and the gasket 32 ​​are both annular structures, the seal 31 and the gasket 32 ​​can be stably supported by the inner wall of the slip ring housing 2, effectively improving the installation stability of the sealing component 3 in the slip ring housing 2.

[0034] Optionally, a through hole 321 is provided on the gasket 32, and the through hole 321 is extended along the radial direction of the slip ring main shaft 1 and passes through the gasket 32. The slip ring main shaft 1 is provided with a flow channel 11 with two opening ends respectively located on the axial end face and the radial outer wall of the slip ring main shaft 1. The slip ring housing 2 is provided with a transmission hole 21, and the transmission hole 21 connects the inside and outside of the slip ring housing 2 along the radial direction of the slip ring main shaft 1 and is used for liquid transmission. The transmission hole 21 is used to communicate with the flow channel 11 through the through hole 321.

[0035] In this embodiment, if Figure 3As shown, a through hole 321 is provided on the cushion block 32, and the through hole 321 can be extended along the radial direction of the slip ring main shaft 1 and penetrate the cushion block 32, and the slip ring main shaft 1 is provided with a flow channel 11 with two opening ends respectively located on the axial end face and the radial outer wall. After the slip ring main shaft 1 is installed in the slip ring housing 2, the flow channel 11 can be connected with the through hole 321 through the gap between the cushion block 32 and the radial outer wall of the slip ring main shaft 1. On this basis, the slip ring housing 2 is provided with a transmission hole 21 that connects the inside and outside of the slip ring housing 2 along the radial direction of the slip ring main shaft 1 and can be used for liquid transmission. When the cushion block 32 is installed inside the slip ring housing 2, the through hole 321 can be correspondingly connected with the transmission hole 21 along the radial direction of the slip ring housing 2. In this way, when the slip ring main shaft 1 rotates around the axial direction in the slip ring housing 2, the liquid can stably flow in the flow channel composed of the transmission hole 21, the through hole 321 and the flow channel 11, thereby ensuring the working stability of the liquid slip ring.

[0036] It should be noted that in the present embodiment, the cross-sectional shapes of the transmission hole 21, the through hole 321 and the flow channel 11 are all circular. In other embodiments of the present invention, the cross-sectional shapes of the transmission hole 21, the through hole 321 and the flow channel 11 may also be other shapes such as polygons.

[0037] Optionally, the gasket 32 ​​is provided with liquid grooves 322 on the radial inner wall and outer wall of the slip ring main shaft 1, and is connected through the through hole 321. The liquid groove 322 is arranged in a ring shape around the axial direction of the slip ring main shaft 1. There are multiple through holes 321, which are arranged at intervals around the axial direction of the slip ring main shaft 1.

[0038] In this embodiment, if Figure 3 and Figure 4 As shown, liquid grooves 322 are provided on the inner and outer walls of the cushion block 32 along the radial direction of the slip ring main shaft 1. The liquid grooves 322 on the inner and outer walls of the cushion block 32 are connected through the through hole 321, and the liquid grooves 322 are arranged in a ring shape around the axis of the slip ring main shaft 1. In this way, when the slip ring main shaft 1 rotates axially in the slip ring housing 2, when the liquid flows between the transmission hole 21 and the through hole 321 or between the through hole 321 and the flow channel 11, the liquid grooves 322 can contain the liquid to ensure the flow stability of the liquid, and The through holes 321 on the cushion block 32 are arranged in a plurality, and the plurality of through holes 321 can be arranged at intervals around the axial direction of the slip ring main shaft 1. In this way, during the rotation of the slip ring main shaft 1, not only can the transmission hole 21 be connected with the plurality of through holes 321 through the liquid groove 322 on the radial outer wall of the cushion block 32 along the slip ring main shaft 1, which is convenient for the transmission of liquid, but also the flow channel 11 on the slip ring main shaft 1 can be connected with the plurality of through holes 321 through the liquid groove 322, which effectively ensures the smooth transmission of liquid, thereby improving the working performance of the liquid slip ring.

[0039] It should be noted that, in the present embodiment, the cross-sectional shape of the liquid groove 322 is a concave shape. In other embodiments of the present invention, the cross-sectional shape of the liquid groove 322 is also a U-shape or a C-shape.

[0040] Optionally, the slip ring housing 2 has a first open end and a second open end which are arranged opposite to each other along the axial direction of the slip ring main shaft 1. A mounting groove 22 is provided in a ring shape on the inner wall of the slip ring housing 2 around the axial direction of the slip ring main shaft 1. The mounting groove 22 passes through the end surface of the first open end of the slip ring housing 2 along the axial direction of the slip ring main shaft 1. The seal 31 and the gasket 32 ​​are alternately stacked and installed in the mounting groove 22 along the axial direction of the slip ring main shaft 1 to form a sealing portion. The sealing assembly 3 also includes a pressure block 33, which is detachably installed at the first open end and cooperates with the groove wall of the mounting groove 22 relative to the first open end and close to the second open end to clamp the sealing portion.

[0041] In this embodiment, if Figure 3 and Figure 4 As shown, the slip ring housing 2 has a first open end and a second open end which are arranged opposite to each other along the axial direction of the slip ring main shaft 1. Specifically, the end of the slip ring main shaft 1 can penetrate into the slip ring housing 2 through the first open end and pass out through the second open end, so as to realize the concentric rotation installation of the slip ring main shaft 1 in the slip ring housing 2, and the inner wall of the slip ring housing 2 is provided with a mounting groove 22 in an annular shape around the axial direction of the slip ring main shaft 1, and the mounting groove 22 penetrates the end surface of the first open end of the slip ring housing 2 along the axial direction of the slip ring main shaft 1, so that the sealing member 31 and the gasket 32 ​​can be alternately placed in the mounting groove 22 of the slip ring housing 2 through the first open end, and the sealing member 31 or the gasket 32 ​​which is placed first is close to the second end relative to the first open end of the mounting groove 22. The groove walls at the open ends abut against each other, thereby forming a sealing portion in the installation groove 22 that fits the radial outer wall of the slip ring main shaft 1. On this clamping, the sealing assembly 3 is also provided with a pressure block 33, wherein the pressure block 33 is detachably installed at the first opening end. After the seal 31 and the gasket 32 ​​are alternately stacked in the installation groove 22 to form a sealing portion, the pressure block 33 can be inserted into the slip ring housing 2 through the first opening end and abut against the sealing portion. After completing the detachable connection between the pressure block 33 and the slip ring housing 2, the pressure block 33 can cooperate with the groove wall of the installation groove 22 to clamp the sealing portion, thereby achieving stable installation of the sealing portion, thereby ensuring the sealing effect and structural stability of the sealing assembly 3 when the slip ring main shaft 1 rotates in the slip ring housing 2.

[0042] Optionally, the pressing block 33 includes a connecting portion 331 and a clamping portion 332 , the connecting portion 331 is detachably connected to the slip ring housing 2 , and the clamping portion 332 cooperates with a groove wall of the installation groove 22 to clamp the sealing portion.

[0043] In this embodiment, if Figure 3 and Figure 4As shown, a connecting portion 331 and a clamping portion 332 are provided to form a pressure block 33. Specifically, the connecting portion 331 is the end of the pressure block 33 that is away from the slip ring main shaft 1 along the radial direction of the slip ring housing 2, and the clamping portion 332 is the end of the pressure block 33 that is close to the slip ring main shaft 1 along the radial direction of the slip ring housing 2, and extends along the axial direction of the slip ring main shaft 1 to facilitate abutment with the sealing portion, so that the connecting portion 331 can be detachably connected to the slip ring housing 2. Specifically, the connecting portion 331 can be detachably connected to the end face of the slip ring housing 2 along the axial direction through a countersunk screw 34.

[0044] Optionally, the pressing block 33 is arranged in an annular shape around the axial direction of the slip ring main shaft 1 , and the radial inner wall of the pressing block 33 and the radial outer wall of the slip ring main shaft 1 are gap-matched.

[0045] In this embodiment, in order to improve the stability of the clamping between the pressing block 33 and the groove wall of the installation groove 22, as shown in FIG. Figure 3 As shown, the pressure block 33 is arranged as an annular structure around the axial direction of the slip ring main shaft 1, wherein the radial inner wall of the pressure block 33 along the slip ring main shaft 1 is clearance-matched with the radial outer wall of the slip ring main shaft 1 and the slip ring main shaft 1, thereby achieving the abutment between the pressure block 33 and the sealing part and avoiding the interference of the pressure block 33 with the rotation of the slip ring main shaft 1, thereby ensuring the rotation stability of the slip ring main shaft 1.

[0046] Optionally, a bearing 23 is provided at the first open end, the bearing 23 is sleeved and mounted on the slip ring main shaft 1 , an accommodating groove 24 is provided between the bearing 23 and the mounting groove 22 , and the connecting portion 331 is located in the accommodating groove 24 and abuts against the bearing 23 .

[0047] In this embodiment, if Figure 3 As shown, in order to ensure the stable rotation of the slip ring main shaft 1, a bearing 23 is arranged at the first open end of the slip ring housing 2, and the bearing 23 is sleeved and installed on the slip ring main shaft 1, and a receiving groove 24 is provided between the bearing 23 and the installation groove 22, and the connecting part 331 can be placed in the receiving groove 24 and can be against the bearing 23, so that the stable rotation of the slip ring main shaft 1 is ensured, and the connecting part 331 can be limited by the bearing 23, so as to further ensure the installation stability of the pressure block 33, and then ensure the installation stability of the sealing assembly 3.

[0048] It should be noted that, in this embodiment, Figure 3 and Figure 4 As shown, the end face of the connecting portion 331 facing the bearing 23 has an abutting surface and a mounting surface, the abutting surface abuts against the bearing 23, and a mounting gap is formed between the mounting surface and the end face of the bearing 23 facing the connecting portion 331, and an upper threaded mounting hole is provided, and the threaded mounting hole is extended along the axial direction of the slip ring housing 2, and the countersunk screw 34 can be placed in the threaded mounting hole and detachably connected to the slip ring housing 2.

[0049] Optionally, the clamping portion 332 is located in the mounting groove 22 or in the receiving groove 24 .

[0050] In this embodiment, if Figure 3 and Figure 4 As shown, the clamping portion 332 is located in the installation groove 22, that is, the sealing portion formed by alternately stacking the seal 31 and the gasket 32 ​​has an axial dimension along the slip ring housing 2 that is smaller than the axial dimension of the installation groove 22 along the slip ring housing 2, and the clamping portion 332 extends into the installation groove 22 and abuts against the gasket 32.

[0051] In other embodiments of the utility model, the clamping portion 332 can also be arranged in the receiving groove 24, that is, the sealing portion formed by alternately stacking the seal 31 and the gasket 32 ​​has an axial dimension along the slip ring housing 2 that is equal to the axial dimension of the mounting groove 22 along the slip ring housing 2, and the clamping portion 332 is located in the receiving groove 24 and can be abutted against the gasket 32.

[0052] On the other hand, an embodiment of the present invention provides an electrical device, comprising the above-mentioned liquid slip ring.

[0053] The technical effect of the electrical device in this embodiment is similar to the technical effect of the above-mentioned liquid slip ring, which will not be described in detail here.

[0054] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A liquid slip ring, characterized in that: The invention comprises a slip ring main shaft (1), a slip ring housing (2) and a sealing assembly (3); the slip ring housing (2) is a hollow rotary structure with openings at both ends; the slip ring main shaft (1) is coaxially rotatably mounted in the slip ring housing (2); the sealing assembly (3) comprises a sealing member (31) and a gasket (32); the sealing member (31) and the gasket (32) are alternately stacked in the slip ring housing (2) along the axial direction of the slip ring main shaft (1), and are both located between the inner wall of the slip ring housing (2) and the outer wall of the slip ring main shaft (1) along the radial direction.

2. The liquid slip ring according to claim 1, characterized in that: The seal (31) and the cushion block (32) are both arranged in an annular shape around the axial direction of the slip ring main shaft (1); the radial inner wall of the seal (31) is gap-matched with the radial outer wall of the slip ring main shaft (1); and the radial outer wall of the seal (31) and the cushion block (32) are both arranged in contact with the inner wall of the slip ring housing (2) along the radial outer wall of the slip ring main shaft (1).

3. The liquid slip ring according to claim 2, characterized in that: The cushion block (32) is provided with a through hole (321), the through hole (321) is extended in the radial direction of the slip ring main shaft (1) and passes through the cushion block (32), the slip ring main shaft (1) is provided with a flow channel (11) with two opening ends respectively located on the axial end face and radial outer wall of the slip ring main shaft (1), the slip ring housing (2) is provided with a transmission hole (21), the transmission hole (21) is connected to the inside and outside of the slip ring housing (2) in the radial direction of the slip ring main shaft (1) and is used for liquid transmission, and the transmission hole (21) is used to communicate with the flow channel (11) through the through hole (321).

4. The liquid slip ring according to claim 3, characterized in that: The cushion block (32) is provided with liquid grooves (322) on the radial inner wall and outer wall of the slip ring main shaft (1), and the liquid grooves (322) are connected via the through hole (321); the liquid grooves (322) are arranged in a ring shape around the axial direction of the slip ring main shaft (1); there are a plurality of through holes (321) which are arranged at intervals around the axial direction of the slip ring main shaft (1).

5. The liquid slip ring according to any one of claims 1 to 4, characterized in that: The slip ring housing (2) has a first open end and a second open end which are arranged opposite to each other along the axial direction of the slip ring main shaft (1); a mounting groove (22) is provided on the inner wall of the slip ring housing (2) in an annular shape around the axial direction of the slip ring main shaft (1); the mounting groove (22) penetrates the end surface of the first open end of the slip ring housing (2) along the axial direction of the slip ring main shaft (1); the sealing member (31) and the cushion block (32) are alternately stacked and installed in the mounting groove (22) along the axial direction of the slip ring main shaft (1) to form a sealing portion; the sealing assembly (3) further comprises a pressing block (33); the pressing block (33) is detachably installed at the first open end and cooperates with a groove wall of the mounting groove (22) opposite to the first open end and close to the second open end to clamp the sealing portion.

6. The liquid slip ring according to claim 5, characterized in that: The pressing block (33) comprises a connecting portion (331) and a clamping portion (332), wherein the connecting portion (331) is detachably connected to the slip ring housing (2), and the clamping portion (332) cooperates with a groove wall of the installation groove (22) to clamp the sealing portion.

7. The liquid slip ring according to claim 5, characterized in that: The pressing block (33) is arranged in a ring shape around the axial direction of the slip ring main shaft (1); the radial inner wall of the pressing block (33) is clearance-matched with the radial outer wall of the slip ring main shaft (1).

8. The liquid slip ring according to claim 6, characterized in that: A bearing (23) is provided at the first open end, the bearing (23) being sleeved and mounted on the slip ring main shaft (1), an accommodating groove (24) being provided between the bearing (23) and the mounting groove (22), the connecting portion (331) being located in the accommodating groove (24) and abutting against the bearing (23).

9. The liquid slip ring according to claim 8, characterized in that: The clamping portion (332) is located in the installation groove (22) or in the receiving groove (24).

10. An electrical device, characterized in that: The invention comprises the liquid slip ring as claimed in any one of claims 1 to 9.

Images