Collector ring

Abstract

The invention relates to the technical field of radar equipment, in particular to a collector ring which comprises a stator, a bearing, a bearing chamber, an oil storage tank and a liquid level control system. The bearing chamber forms a sealed space for accommodating a bearing and lubricating oil; the oil storage tank is fixedly arranged in the stator; the oil storage tank is communicated with the bearing chamber and is provided with a first valve; the liquid level control system controls the total amount of lubricating oil in the bearing chamber to be maintained at a preset liquid level by controlling opening or closing of the first valve. According to the collector ring, lubricating oil consumed due to friction in the bearing chamber can be continuously supplemented in the high-speed operation process, bearing abrasion is effectively reduced, the service life of the collector ring is greatly prolonged, and the maintenance task load is reduced. And the bearing chamber is not fully filled with lubricating oil, the excessive lubricating oil can increase the rotation resistance of the equipment, and a liquid level control system is arranged, so that the lubricating oil in the bearing chamber is kept at the optimal liquid level height.

Description

Technical Field

[0001] The invention relates to the technical field of radar equipment, in particular to a slip ring. Background Art

[0002] Slip rings are also called collector rings, conductive rings, slip rings, collector rings, etc. They can be used in any electromechanical system that requires continuous rotation while transmitting power and signals from a fixed position to a rotating position. Slip rings can improve system performance, simplify system structure, and prevent wires from being twisted during rotation.

[0003] There are many parts on the slip ring. During the operation of the slip ring, its important parts need to be lubricated. Bearings are one of the important parts that need to be lubricated on the slip ring. The slip rings currently used on the market have ordinary bearings, which are lubricated by grease. This type of bearing can still cope with the use occasions under general conditions, but under high-speed rotation conditions, the grease will generate a lot of heat, increase the friction coefficient inside the bearing, greatly reduce the lubrication effect of the bearing, and thus reduce the service life of the slip ring. Summary of the invention

[0004] In order to solve the above-mentioned prior art problems, the present invention provides a slip ring, comprising: a stator, a bearing, a bearing chamber, an oil storage tank and a liquid level control system; The bearing chamber forms a sealed space to accommodate the bearing and lubricating oil; The oil storage tank is fixedly arranged in the stator; Wherein, a communication channel is provided between the oil storage tank and the bearing chamber, and a first valve is provided in the communication channel; The liquid level control system controls the opening or closing of the first valve to control the total amount of lubricating oil in the bearing chamber to maintain a preset liquid level.

[0005] Furthermore, a transition chamber is formed outside the bearing chamber, and the oil in the oil storage tank enters the bearing chamber after passing through the transition chamber; The positional relationship of the chambers in the height direction is, from top to bottom, the oil storage tank, the transition chamber, and the bearing chamber; The volume of the transition chamber is greater than the oil filling volume of the bearing chamber; the oil filling volume is the residual volume of the bearing chamber volume minus the bearing volume; Wherein, the liquid level control system controls the liquid level height of the bearing chamber by controlling the liquid level height of the transition chamber.

[0006] Further, the liquid level control system includes: a liquid level monitoring module; The liquid level monitoring module is arranged in the transition chamber, and when the oil in the transition chamber reaches a preset liquid level, the first valve is closed; The transition chamber is always connected to the bearing chamber.

[0007] Furthermore, the liquid level monitoring module starts or closes the first valve after receiving the liquid level change signal for at least a certain preset time.

[0008] Further, the liquid level control system includes a first oil circuit connecting the transition chamber and the oil storage tank; a second oil passage, connecting the transition chamber and the bearing chamber; Wherein, the first valve is provided in the first oil circuit; A second valve is provided in the second oil circuit; The liquid level control system switches between an oil filling mode and a closing mode; The oil injection mode is to open the first valve and close the second valve, and then close the first valve and then open the second valve; The closing mode is that the first valve and the second valve are closed at the same time; The distances from each wall to the top of the oil tank in vertical height are: The bottom surface of the oil storage tank: L1; The top surface of the transition chamber: L2; the bottom surface of the transition chamber: L3; The top surface of the bearing chamber: L4; the bottom surface of the bearing chamber: L5; Among them, L1 <L4<L2<L3<L5; The top surface of the transition chamber is located at an optimal liquid level height of the bearing chamber.

[0009] Furthermore, in the oil injection mode, the first valve and the second valve perform multiple switching cycles.

[0010] Furthermore, an exhaust pipeline protrudes from the top of the transition chamber, and a third valve is provided in the exhaust pipeline; The third valve opens and closes synchronously with the second valve; In the vertical direction, the third valve is higher than the first valve.

[0011] Further, the transition chamber is connected to the oil storage tank via a regulating pipeline; The liquid level control system comprises: an adjusting cylinder; a regulating pipeline extending from the adjusting pipeline perpendicularly to the top surface of the transition chamber to the interior of the transition chamber; A floating ball is arranged in the regulating cylinder; The diameter of the middle section of the adjusting tube in the length direction is larger than the diameters of the two ends, and the adjusting tube has through holes around the end not connected to the adjusting pipeline, and the diameters of the two ends of the adjusting tube are smaller than the diameter of the floating ball; The float ball is subjected to buoyancy and abuts against the inlet of the regulating cylinder; The position where the float abuts against the regulating cylinder due to the buoyancy is higher than the optimal liquid level height of the bearing chamber; The first valve is opened when entering the oil injection mode.

[0012] Furthermore, the float is connected to an elastic rope, and the elastic rope provides a force for the float to abut against the outlet of the regulating cylinder; The elastic force provided by the elastic rope in the transition chamber corresponding to each bearing chamber is different in magnitude; The elastic force provided by the elastic rope corresponding to the bearing chamber that is farther away from the oil storage tank is greater.

[0013] Furthermore, the liquid level control system records the real-time number of revolutions N1 of the slip ring, and has a built-in preset number of revolutions N2; When N1=N2, the oil injection mode is entered and the real-time lap count is cleared.

[0014] The beneficial effect of the present invention is that the merge ring provided by the present application can continuously replenish the lubricating oil consumed by friction in the bearing chamber during high-speed operation, effectively reduce bearing wear, greatly increase the service life of the merge ring and reduce the amount of maintenance tasks. In addition, the present application does not completely fill the bearing chamber with lubricating oil. Excessive lubricating oil will increase the resistance to the rotation of the equipment. For this purpose, the present application is provided with a liquid level control system to maintain the lubricating oil in the bearing chamber at an optimal liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a slip ring provided by the present invention; Figure 2 A schematic cross-sectional structure diagram of a slip ring in Embodiment 2 provided by the present invention; Figure 3 A schematic cross-sectional structure diagram of a slip ring in Embodiment 3 provided by the present invention; Figure 4 for Figure 3 An enlarged schematic diagram of point a; Figure 5 It is a schematic diagram of the height of each chamber of the slip ring in Example 3 provided by the present invention; Figure 6 A schematic cross-sectional structure diagram of a slip ring in Embodiment 4 provided by the present invention; Figure 7 for Figure 6 An enlarged schematic diagram of point b; Figure 8 for Figure 6 Enlarged schematic diagram of point c.

[0016] Figure numerals: 1. bearing chamber; 2. oil storage tank; 3. transition chamber; 4. first valve; 511. liquid level monitoring module; 521. first oil circuit; 522. second oil circuit; 523. second valve; 524. exhaust pipe; 525. third valve; 531. regulating pipe; 532. regulating cylinder; 5321. through hole; 533. float; 534. elastic rope; 6. stator; 7. rotor. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 are within the scope of protection of the present invention.

[0018] Example 1 Reference Figure 1-Figure 8 .

[0019] A merge ring, comprising: a stator 6, a bearing, a bearing chamber, an oil storage tank and a liquid level control system; An oil storage tank 2, wherein the oil storage tank 2 is fixedly disposed in the stator 6; Wherein, a communication channel is provided between the oil storage tank 2 and the bearing chamber 1, and a first valve 4 is provided in the communication channel; The first valve 4 is controlled to be opened or closed so as to control the total amount of lubricating oil in the bearing chamber 1 to be maintained at a preset liquid level.

[0020] Slip rings are commonly used in radars. Slip rings are key components that connect rotating antennas and stationary signal processing systems. The structure of the slip rings mainly includes a stator 6, a rotor 7, a housing, bearings, and brushes. The stator 6 is usually fixedly connected to the housing, and the stator 6 and the rotor 7 are rotationally connected through bearings. Conductive elements such as brushes and conductive rings are arranged between the stator 6 and the rotor 7. The stator 6 is fixedly arranged in a bracket of the radar, and a wire is extended to connect to the control system of the radar. The wire at the extension point where the rotor 7 is connected to the rotating shaft of the radar is connected to the receiving component of the radar, so that the receiving component of the radar can be connected to the control system during continuous rotation. In the present application, the oil tank 2 in the slip ring is fixedly connected to the stator 6, including the oil tank 2 being indirectly fixedly connected to the stator 6, for example, the stator 6 is fixedly connected to the housing, the oil tank 2 is fixed in the housing, the stator 6 is fixedly connected to the bearing end cover, the oil tank 2 is fixed in the bearing end cover, and the stator 6 is fixed in the bracket of the radar, and the oil tank 2 is fixed in the bracket of the radar.

[0021] The bearing chamber 1 is mainly composed of the walls of the stator 6 and the rotor 7 (or the bearing sleeve connecting the stator 6 or the rotor 7) and the bearing end cover. Friction pairs or sealing rings are arranged between the relatively rotating walls to ensure relative rotation and sealing.

[0022] It must be able to rotate at high speed to ensure uninterrupted signal transmission. The bearing is undoubtedly the most critical component in the rotating structure. Continuous high-speed rotation not only greatly tests the machining accuracy of the bearing, but also causes the lubricant to be consumed quickly. Therefore, the merge ring used in high-speed rotation scenarios needs to be frequently maintained and lubricated regularly. In addition, the bearing chamber 1 of the merge ring needs to be sealed to prevent impurities from entering the bearing chamber 1, corroding or squeezing the rollers of the bearing, and affecting the smooth operation of the bearing. As an electrical component, it requires at least a shell and other structures for sealing to reduce dust, rainwater, etc. that interfere with the normal operation of the merge ring. Therefore, it is very cumbersome to add lubricating oil to the bearing every time.

[0023] In this regard, the present application provides a self-lubricating merge ring, which eliminates the need for manual and regular addition of lubricating oil to the bearing.

[0024] An oil storage tank 2 is placed outside the bearing chamber 1. The oil storage tank 2 provides sufficient volume to store sufficient lubricating oil. The oil storage tank 2 should also be set as a closed structure to prevent impurities from entering and contaminating the lubricating oil. The oil storage tank 2 is fixed in the stator 6 of the merge ring and does not rotate. The oil storage tank 2 is connected to the bearing chamber 1, and a first valve 4 is set in the passage. The oil control system controls the opening and closing of the first valve 4. When the first valve 4 is opened, the lubricating oil in the oil storage tank 2 flows to the bearing chamber 1.

[0025] However, bearing lubrication should be moderate. When there is too much lubricating oil in the bearing chamber 1, the excess lubricant will increase the running resistance of the bearing. In a sliding bearing, too much lubricating oil will form a thicker oil film, which will increase the movement resistance of the journal in the bearing. This is like adding a thick layer of "glue" between the journal and the bearing, which hinders the normal movement of the journal. This increased running resistance will lead to an increase in the energy consumption of the equipment.

[0026] Therefore, the first valve 4 cannot be opened continuously to fill the bearing chamber 1 with lubricating oil. It is necessary to set a preset liquid level, that is, an optimal liquid level, in the bearing chamber 1. At this liquid level, the lubricating oil can fully lubricate the bearing and will not cause excessive resistance to the bearing. For this purpose, the present application sets a liquid level control system. Simply put, the liquid level control system can set the first valve 4 as a flow valve to determine the total amount of oil injection each time, or control the opening time of the first valve 4.

[0027] Furthermore, the slip ring further comprises a transition chamber 3, which is arranged in a ring shape and surrounds the bearing chamber 1; The oil storage tank 2 is connected to the bearing chamber 1 through the transition chamber 3; The volume of the transition chamber 3 is greater than the oil filling volume of the bearing chamber 1; the oil filling volume is the residual volume of the bearing chamber 1 minus the bearing volume; The liquid level control system controls the liquid level of the bearing chamber 1 by controlling the liquid level of the transition chamber 3 .

[0028] The bearing chamber 1 needs to accommodate the bearing, so the remaining internal space is very limited, and the bearing rotates at high speed, so it is difficult to add components to the bearing chamber 1 to control the liquid level height of the bearing chamber 1. For this reason, a transition chamber 3 is provided in the present embodiment, and a communicating vessel is formed through the transition chamber 3 and the bearing chamber 1, so that the liquid level height of the bearing chamber 1 is reflected by the liquid level height of the transition chamber 3.

[0029] The positional relationship of the chambers in the height direction is, from top to bottom, the oil storage tank 2, the transition chamber 3, and the bearing chamber 1, so that the lubricating oil can flow by itself due to gravity.

[0030] Example 2 Reference Figure 2 .

[0031] A liquid level monitoring module 511 is arranged in the transition chamber 3, and the liquid level control system comprises: a liquid level monitoring module 511; The liquid level monitoring module 511 is disposed in the transition chamber 3. When the oil in the transition chamber 3 reaches a preset liquid level, the first valve 4 is closed. The transition chamber 3 and the bearing chamber 1 are always connected.

[0032] The liquid level monitoring module 511 is preferably a photoelectric liquid level sensor, which is smaller in size and easier to arrange than other forms of measuring devices; The transition chamber 3 and the bearing chamber 1 are always connected, and a communicating vessel is formed between the transition chamber 3 and the bearing chamber 1. The oil height in the transition chamber 3 can reflect the oil height in the bearing chamber 1. The liquid level monitoring module 511 is set in the transition chamber 3, rather than directly in the bearing chamber 1. The bearing in the bearing chamber 1 rotates continuously, stirring the oil, and the oil is very turbulent. Therefore, it is impossible to obtain the oil height in the bearing chamber 1 when the equipment is running. The oil fluctuation in the transition chamber 3 is much smaller than the oil fluctuation in the bearing chamber 1. Therefore, in this embodiment, the oil height in the bearing chamber 1 is indirectly obtained by measuring the oil height in the transition chamber 3. Compared with directly measuring the liquid level in the bearing chamber 1, the interference of the bearing rotation can be greatly reduced, the difficulty of obtaining is easier, and the value is more accurate.

[0033] Furthermore, the liquid level monitoring module 511 starts or closes the first valve 4 after receiving the liquid level change signal for at least a certain preset time.

[0034] The working environment for fixed radars is very stable, but for vehicle-mounted radars, the working environment is very harsh. The merge ring is accompanied by bumps during rotation, which will cause the oil to shake. The shaking oil level will be high or low, which can easily lead to wrong judgments by the liquid level monitoring module 511.

[0035] In this regard, a preset time is added in this embodiment, and it is necessary to confirm that the liquid level has indeed dropped or risen to the corresponding height before switching to the oil injection mode or stopping the oil injection mode. The shaking liquid surface has a certain amplitude. When the liquid in a calm state is located at the monitoring liquid level, the shaking will cause an offset. The height of the monitoring liquid level is N. When it shakes to a high position, the liquid level height is N+X. When it shakes to a low position, the liquid level height is NX. The actual liquid level height in the calm state is M. In the oil injection mode, the liquid level continues to rise. When MX is greater than N, the liquid level monitoring module 511 will receive a signal to stop oil injection (a signal reaching a predetermined height) for a long time. In the non-oil injection mode, the liquid level gradually drops. On the contrary, when M+X is less than N, a signal to stop oil injection is received. The preset time can be set to about 2 seconds. If the preset time is too long, it is easy to cause excessive oil injection. At the same time, the oil injection speed can be reduced, for example, the diameter of the oil inlet of the transition chamber 3 can be reduced to avoid excessive oil injection due to untimely stopping of the oil injection mode.

[0036] Example 3 Reference Figure 1 , 3 , 4, 5.

[0037] The liquid level control system comprises a first oil circuit 521 connecting the transition chamber 3 and the oil storage tank 2; The second oil passage 522 is connected with the transition chamber 3 and the bearing chamber 1; Wherein, the first valve 4 is disposed in the first oil circuit 521; A second valve 523 is provided in the second oil circuit 522; The liquid level control system switches between an oil filling mode and a closing mode; The oil filling mode is to open the first valve 4 and close the second valve 523, and then close the first valve 4 and then open the second valve 523; The closing mode is that the first valve 4 and the second valve 523 are closed at the same time; The distances of the walls from the top surface of the oil storage tank 2 in vertical height are: The bottom surface of the oil storage tank 2: L1; The top surface of the transition chamber 3 is L2; ​​the bottom surface of the transition chamber 3 is L3; The top surface of the bearing chamber 1: L4; the bottom surface of the bearing chamber 1: L5; Among them, L1 <L4<L2<L3<L5; The top surface of the transition chamber 3 is located at the optimal liquid level height of the bearing chamber 1 .

[0038] There are some limitations to monitoring liquid levels through electronic components such as sensors: 1. Electronic components need regular maintenance, for example, the lens of the photoelectric liquid level sensor needs to be cleaned regularly; 2. Errors are prone to occur, especially in a bumpy environment. In Example 2, the preset time is added to convert the original preset liquid level value into a numerical range, so that the liquid level in the bearing chamber 1 is in a relatively good range, but it cannot reach the optimal liquid level, and each oil injection is in an excessive state. However, in some special cases, such as large ups and downs, the liquid surface is tilted for a long time, and the liquid level monitoring module 511 will still make a misjudgment.

[0039] Therefore, the liquid level control system in the form of the liquid level monitoring module 511 is not suitable for the slip ring of the mobile radar system. In this regard, this embodiment provides a liquid level control system that does not require the liquid level monitoring module 511.

[0040] In this regard, this embodiment provides a liquid level control system structure that does not require liquid level sensing.

[0041] Specifically, in this embodiment, a first valve 4 and a second valve 523 are provided. The first valve 4 is responsible for cutting off the connection between the transition chamber 3 and the oil storage tank 2, and the second valve 523 is responsible for cutting off the connection between the transition chamber 3 and the bearing chamber 1. The first valve 4 and the second valve 523 are not opened at the same time. When the first valve 4 is opened and the second valve 523 is closed, the oil storage tank 2 injects oil toward the transition chamber 3 without affecting the liquid level in the bearing chamber 1; when the second valve 523 is opened and the first valve 4 is closed, the transition chamber 3 transports lubricating oil toward the bearing chamber 1, and the oil storage tank 2 cannot replenish lubricating oil for the transition chamber 3.

[0042] In combination with the control of the relative positions of the chambers in this embodiment, firstly, the bottom surface of the oil storage tank 2 is higher than the top surface of the transition chamber 3, and the bottom surface of the transition chamber 3 is higher than the bottom surface of the bearing chamber 1, so that the lubricating oil can flow naturally by gravity without the need for a driving pump to transport it. At the same time, the top surface of the transition chamber 3 is lower than the top surface of the bearing chamber 1, so the transition chamber 3 can never fill the bearing chamber 1 with lubricating oil. The top surface height of the transition chamber 3 limits the maximum oil filling height of the bearing chamber 1, and this maximum oil filling height can be set to the preset liquid level height. In other words, lubricating oil can be added to the bearing chamber 1 frequently. If there is little lubricating oil remaining in the bearing chamber 1, the transition chamber 3 will inject more lubricating oil into the bearing chamber 1. If there is a lot of lubricating oil remaining in the bearing chamber 1, less lubricating oil will be injected, and the oil level in the bearing chamber 1 will continue to approach the top surface height of the transition chamber 3.

[0043] For the merge ring, there is more than one bearing chamber 1. When there are two bearing chambers 1, two transition chambers 3 should also be provided. One transition chamber 3 corresponds to one bearing chamber 1 (the position relationship and the connection relationship correspond), and only one oil storage tank 2 can be provided, which can be set at the highest position in the vertical direction. When the lubricating oil is completely used up, it can be directly replenished to the oil storage tank 2 to replenish each bearing chamber 1 at the same time.

[0044] Furthermore, in the oil injection mode, the first valve 4 and the second valve 523 perform multiple switching cycles.

[0045] With regard to the structure of the present embodiment, the transition chamber 3 cannot directly inject the lubricating oil in the bearing chamber 1 to reach the preset liquid level. In the most extreme case, there is no lubricating oil in the bearing chamber 1. If the transition chamber 3 and the bearing chamber 1 have the same volume and cross-section (in actual circumstances, there is a bearing in the bearing chamber 1, and the cross-section of the area of ​​the bearing chamber 1 that accommodates the lubricating oil must be smaller than the cross-section of the transition chamber 3, so the actual amount of oil injection must be greater than the extreme case), then the transition chamber 3 can only inject one-half of the volume of the lubricating oil into the bearing chamber 1, and the height of the transition chamber 3 is lower than the height of the bearing chamber 1. Therefore, the one-half of the volume of the lubricating oil in the transition chamber 3 obviously cannot reach half of the preset liquid level, which cannot meet the lubrication requirements of the convergence ring and will make the preset liquid level set in this application meaningless.

[0046] Therefore, in this embodiment, the characteristic that the liquid level in the bearing chamber 1 cannot exceed the top surface of the transition chamber 3 is utilized, and the first valve 4 and the second valve 523 are opened and closed for multiple cycles. The liquid level in the bearing chamber 1 is logarithmically distributed under multiple cycles, and about three to four cycles are sufficient.

[0047] Furthermore, an exhaust pipe 524 is protruded from the top of the transition chamber 3, and a third valve 525 is provided in the exhaust pipe 524; The third valve 525 opens and closes synchronously with the second valve 523; In the vertical direction, the third valve 525 is higher than the first valve 4 .

[0048] The transition chamber 3 and the bearing chamber 1 are both closed spaces, and the liquid cannot be connected to the outside atmosphere, which will cause the liquid to continue to maintain the initial height difference, that is, the lubricating oil in the transition chamber 3 is difficult to flow (it is not absolutely sealed, but the lubricating oil cannot flow to the bearing chamber 1 in a short time).

[0049] In this embodiment, an exhaust pipe 524 is provided at the top of the transition chamber 3 so that the interior of the transition chamber 3 can be connected to the atmosphere. The connection between the transition chamber 3 and the atmosphere is cut off by the third valve 525. In the non-oil injection mode, the third valve 525 is the highest liquid level in the entire transition chamber 3 space to prevent the lubricating oil from overflowing from the exhaust pipe. The non-connected section of the exhaust pipe 524 can exceed the third valve 525 by a distance to prevent the lubricating oil from flowing out due to bumps after the third valve 525 is opened. The third valve 525 is opened synchronously with the second valve 523, and the transition chamber 3 and the bearing chamber form a communicating vessel, and the excess air pressure is released to the external environment by the exhaust pipe 524.

[0050] Example 4 Reference Figure 7 and Figure 8 .

[0051] The transition chamber 3 is connected to the oil storage tank 2 via a regulating pipeline 531; The liquid level control system includes: an adjustment cylinder 532; an adjustment pipeline 531 extending perpendicularly from the top surface of the transition chamber 3 to the interior of the transition chamber 3; The floating ball 533 is disposed in the adjusting cylinder 532; The diameter of the middle section of the adjusting cylinder 532 in the length direction is larger than the diameters of the two ends, and the adjusting cylinder 532 has a through hole 5321 around the end not connected to the adjusting pipeline 531, and the diameters of the two ends of the adjusting cylinder 532 are smaller than the diameter of the floating ball 533; The float ball 533 is subjected to buoyancy and abuts against the inlet of the regulating cylinder 532; The position where the float ball 533 abuts against the regulating cylinder 532 due to the buoyancy is higher than the preset liquid level height of the bearing chamber 1; When entering the oil injection mode, the first valve 4 is opened.

[0052] After the first valve 4 is opened, the lubricating oil flows into the regulating pipeline 531. Under normal conditions, the lubricating oil in the transition chamber 3 is less at this time, and the float 533 will not be affected by the buoyancy. After the lubricating oil enters the regulating cylinder 532, it will be ignored and flow out directly from the through hole 5321. As the lubricating oil in the transition chamber 3 increases, the float 533 is gradually affected by the buoyancy and gradually approaches the connecting end of the regulating cylinder 532, gradually reducing the area of ​​the entrance of the regulating cylinder 532 until the entrance of the regulating cylinder 532 is blocked. Stop or greatly reduce the amount of oil injection into the transition chamber 3 and the bearing chamber 1, so as to avoid excessive oil injection, resulting in excessive resistance of the bearing chamber 1. If there is a lot of lubricating oil remaining in the transition chamber 3 and the bearing chamber 1, only a small amount of lubricating oil needs to be delivered, and the float 533 will rise to block the entrance of the regulating cylinder 532, so as to avoid the first valve 4 not being closed in time, resulting in too much lubricating oil in the bearing chamber 1.

[0053] Furthermore, the float 533 is connected to an elastic rope 534, and the elastic rope 534 provides a force for the float 533 to abut against the outlet of the regulating cylinder 532; The elastic force provided by the elastic rope 534 in the transition chamber 3 corresponding to each bearing chamber 1 is different; The farther the bearing chamber 1 is from the oil storage tank 2 , the greater the elastic force provided by the elastic rope 534 corresponding to the bearing chamber 1 .

[0054] There are at least two bearing chambers 1 in the merge ring with a height difference. Each bearing chamber 1 is provided with a corresponding transition chamber 3. Therefore, the distance between each float 533 and the liquid surface in the oil storage tank 2 is different. Therefore, the buoyancy required for the float 533 to block the entrance of the regulating cylinder 532 is also different, especially for the bearing chamber 1 located at a low place. The distance between the bearing chamber 1 and the oil storage tank 2 can reach 20-40cm, which varies according to the merge ring model.

[0055] Taking 30cm as an example, the density of lubricating oil is 0.84g / cm³, the inner diameter of regulating pipe 531 is 1cm, and the diameter of float 533 is 2cm. When float 533 contacts the entrance of regulating tube 532, it will be subjected to a pressure of 0.194N, while even if float 533 is completely immersed in lubricating oil, the buoyancy it will be subjected to is only 0.034N, which is far from enough to resist the pressure of lubricating oil.

[0056] For this purpose, an elastic rope 534 can be provided in the float 533 to assist the float 533 in moving upward. The other end of the elastic rope 534 is connected to the regulating pipeline 531 to provide an upward force for the float 533 through the elastic rope 534. Before the float 533 is subjected to the buoyancy, the lubricating oil above the float 533 can overcome the elastic force of the elastic rope 534 to push the float 533 away and open the entrance of the regulating cylinder 532. As the buoyancy of the float 533 increases, the lubricating oil will not be able to push the float 533 away. The elastic rope 534 only needs to provide the elastic force of the maximum pressure value to which the float 533 is subjected when the bottom surface of the oil storage tank 2 reaches the preset liquid level depth of the low-position bearing chamber 1, so as to ensure that the float 533 can be pushed away even when the lubricating oil in the oil storage tank 2 is about to run out.

[0057] In this application, the influence of the lubricating oil in the pipeline (a section of the first pipeline from the first valve 4 to the transition chamber 3, the entire second pipeline, and a section of the third pipeline from the third valve 525 to the transition chamber 3) on the oil filling amount is ignored, but this does not affect the implementation and effect of the present application. Each time the oil is filled, the lubricating oil in the pipeline will increase the oil filling amount of the bearing chamber 1 by a certain amount. Technical personnel in this field can reduce and control the influence of the pipeline on the oil filling amount by reducing parameters such as the pipeline length, thickness, and valve position, or set a fixed coefficient to eliminate the influence of the lubricating oil in the pipeline.

[0058] Example 5 The liquid level control system records the real-time number of revolutions N1 of the merge ring, and has a built-in preset number of revolutions N2; When N1=N2, the oil injection mode is entered and the real-time lap count is cleared.

[0059] In Example 3 and Example 4, the liquid level monitoring module 511 is not provided, so the liquid level information in the bearing chamber 1 cannot be obtained, and therefore the conditions for starting the oil filling mode need to be changed. In this embodiment, the number of rotations of the merge ring is used as the starting condition for the oil filling mode. The number of rotations of the merge ring is actually the number of rotations of the motor, and the information is easy to obtain. At the same time, the main reason for the consumption of lubricating oil is the friction generated during rotation. Therefore, the preset number of revolutions N2 can better reflect the consumption of lubricating oil, so that the lubricating oil is replenished after the lubricating oil is consumed to a certain extent, thereby reducing the number of unnecessary starts of the oil filling mode.

[0060] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0061] In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0064] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0065] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slip ring, characterized in that: include: Stator, bearing, bearing chamber, oil storage tank and liquid level control system; The bearing chamber forms a sealed space to accommodate the bearing and lubricating oil; The oil storage tank is fixedly arranged in the stator; Wherein, a communication channel is provided between the oil storage tank and the bearing chamber, and a first valve is provided in the communication channel; The liquid level control system controls the opening or closing of the first valve to control the total amount of lubricating oil in the bearing chamber to maintain a preset liquid level.

2. A slip ring according to claim 1, characterized in that: A transition chamber is formed around the bearing chamber, and the oil in the oil storage tank enters the bearing chamber after passing through the transition chamber; The positional relationship of the chambers in the height direction is, from top to bottom, the oil storage tank, the transition chamber, and the bearing chamber; The volume of the transition chamber is greater than the oil filling volume of the bearing chamber; the oil filling volume is the residual volume of the bearing chamber volume minus the bearing volume; Wherein, the liquid level control system controls the liquid level height of the bearing chamber by controlling the liquid level height of the transition chamber.

3. A slip ring according to claim 2, characterized in that: The liquid level control system comprises: a liquid level monitoring module; The liquid level monitoring module is arranged in the transition chamber, and when the oil in the transition chamber reaches a preset liquid level, the first valve is closed; The transition chamber is always connected to the bearing chamber.

4. A slip ring according to claim 3, characterized in that: The liquid level monitoring module starts or closes the first valve after receiving the liquid level change signal for at least a certain preset time.

5. A slip ring according to claim 2, characterized in that: The liquid level control system comprises a first oil circuit connecting the transition chamber and the oil storage tank; a second oil passage, connecting the transition chamber and the bearing chamber; Wherein, the first valve is provided in the first oil circuit; A second valve is provided in the second oil circuit; The liquid level control system switches between an oil filling mode and a closing mode; The oil injection mode is to open the first valve and close the second valve, and then close the first valve and then open the second valve; The closing mode is that the first valve and the second valve are closed at the same time; The distances from each wall to the top of the oil tank in vertical height are: The bottom surface of the oil storage tank: L1; The top surface of the transition chamber: L2; the bottom surface of the transition chamber: L3; The top surface of the bearing chamber: L4; the bottom surface of the bearing chamber: L5; Among them, L1 <L4<L2<L3<L5; The top surface of the transition chamber is located at an optimal liquid level height of the bearing chamber.

6. A slip ring according to claim 5, characterized in that: In the oil injection mode, the first valve and the second valve perform multiple switching cycles.

7. A slip ring according to claim 6, characterized in that: An exhaust pipeline protrudes from the top of the transition chamber, and a third valve is arranged in the exhaust pipeline; The third valve opens and closes synchronously with the second valve; In the vertical direction, the third valve is higher than the first valve.

8. The slip ring according to claim 2, characterized in that: The transition chamber is connected to the oil storage tank via a regulating pipeline; The liquid level control system comprises: an adjusting cylinder; a regulating pipeline extending from the adjusting pipeline perpendicularly to the top surface of the transition chamber to the interior of the transition chamber; A floating ball is arranged in the regulating cylinder; The diameter of the middle section of the adjusting tube in the length direction is larger than the diameters of the two ends, and the adjusting tube has through holes around the end not connected to the adjusting pipeline, and the diameters of the two ends of the adjusting tube are smaller than the diameter of the floating ball; The float ball is subjected to buoyancy and abuts against the inlet of the regulating cylinder; The position where the float abuts against the regulating cylinder due to the buoyancy is higher than the optimal liquid level height of the bearing chamber; The first valve is opened when entering the oil injection mode.

9. A slip ring according to claim 8, characterized in that: The float is connected to an elastic rope, and the elastic rope provides a force for the float to abut against the outlet of the regulating cylinder; The elastic force provided by the elastic rope in the transition chamber corresponding to each bearing chamber is different in magnitude; The elastic force provided by the elastic rope corresponding to the bearing chamber that is farther away from the oil storage tank is greater.

10. A slip ring according to claim 7 or 9, characterized in that: The liquid level control system records the real-time number of revolutions N1 of the merge ring, and has a built-in preset number of revolutions N2; When N1=N2, the oil injection mode is entered and the real-time lap count is cleared.

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