Balancing ring and CT machine

Abstract

The application discloses a balance ring and a CT machine. The balance ring comprises a ring body and balance liquid. The ring body is formed with a sealing cavity in a ring shape. The balance liquid fills part of the sealing cavity. The balance ring is installed on a rotating gantry of the CT machine. The central axis of the balance ring is coaxial with the rotating axis of the rotating gantry. When the rotating gantry rotates at a high speed, the balance liquid automatically flows to the side with lighter mass due to centrifugal force, thereby balancing eccentric load, ensuring imaging quality, and reducing the possibility of equipment wear and failure.

Description

Technical Field

[0001] This application relates to the field of CT technology, and in particular to a balance ring and a CT scanner. Background Technology

[0002] CT (Computed Tomography) equipment is developing at increasingly higher speeds, requiring the gantry to rotate at high speeds during the scanning process. If the gantry is unbalanced, it will cause mechanical vibration, affecting image quality, increasing equipment wear, and even leading to malfunctions.

[0003] In related technologies, counterweights of fixed mass are typically installed symmetrically to offset static unbalanced forces through a preset mass distribution. However, this method is suitable for initial static equilibrium but cannot adapt to dynamic mass changes (such as thermal deformation of the X-ray tube). It still affects imaging quality, increases equipment wear, and may even lead to malfunctions. Summary of the Invention

[0004] This application provides a balance ring and a CT scanner, which can solve the problems that still exist in related technologies, such as affecting imaging quality, increasing equipment wear, and even causing malfunctions.

[0005] In a first aspect, embodiments of this application provide a balancing ring, characterized in that the balancing ring is used in a CT scanner, the CT scanner including a rotating gantry, the balancing ring being mounted on the rotating gantry and the central axis of the balancing ring being coaxial with the rotation axis of the rotating gantry, the balancing ring comprising:

[0006] The ring body forms a ring-shaped sealed cavity; and

[0007] A balancing fluid is filled in a portion of the sealed cavity, and the balancing fluid can flow within the sealed cavity when the rotating frame rotates.

[0008] In some embodiments, the ring body has inner rings and outer rings spaced radially apart along the ring body, and the balancing ring further includes:

[0009] Multiple baffles are spaced apart along the circumference of the ring body in the sealing cavity and connected to the outer ring. A retention groove is formed between the baffles and the outer ring. The opening of the retention groove is located upstream of the retention groove along a first preset direction.

[0010] In some embodiments, the balance ring further includes a plurality of guide plates, which are spaced apart circumferentially within the sealing cavity and connected to the inner ring. Each guide plate has a first side and a second side opposite to each other along the first preset direction. The first side faces the outer ring, and the second side faces the inner ring.

[0011] In some embodiments, along the axial direction of the ring body, the guide plate has a first end and a second end spaced apart, the arrangement direction of the first end and the second end forming an angle α with the axial direction of the ring body, wherein the α satisfies: 15°≤α≤30°;

[0012] And / or, along the radial direction of the ring body, the minimum distance between the guide plate and the baffle is h1, where 3mm≤h1≤10mm.

[0013] In some embodiments, the ring body has two inner sidewalls spaced apart along the axial direction of the ring body, and the guide plate abuts against the two inner sidewalls at both ends along the axial direction of the ring body.

[0014] In some embodiments, a plurality of partition plates are also included, which are spaced apart in the sealing cavity along the circumference of the ring body and connected to the ring body to divide the sealing cavity into a plurality of sub-cavities. The partition plates are provided with through holes that connect two adjacent sub-cavities.

[0015] And / or, the ring body has two inner sidewalls spaced apart along the axial direction of the ring body, and the baffle abuts against the two inner sidewalls at both ends along the axial direction of the ring body.

[0016] In some embodiments, the baffle includes:

[0017] A first plate, the first plate being connected to the outer ring; and

[0018] The second plate is connected to the end of the first plate away from the outer ring and is positioned opposite and spaced apart from the outer ring. Along the first preset direction, the second plate is located upstream of the first plate, and the retention groove is formed between the second plate, the first plate, and the outer ring.

[0019] The angle between the side of the first plate facing the retention groove and the side of the second plate facing the retention groove is β, and β satisfies: 80°≤β≤100°.

[0020] In some embodiments, the depth of the retention groove along the direction perpendicular to the first plate is h2, where h2 satisfies: 5mm≤h2≤8mm;

[0021] And / or, along the circumference of the ring body, the distance between two adjacent baffles is h3, where h3 satisfies: 40mm≤h3≤60mm.

[0022] Secondly, embodiments of this application provide a CT scanner, including the aforementioned balance ring and the rotating frame, wherein the rotating frame has a mounting groove, and at least a portion of the balance ring is located within the mounting groove.

[0023] In some embodiments, a damping pad is provided between the balance ring and the rotating frame.

[0024] Based on the embodiments of this application, the balance ring and CT scanner include a ring body and a balance fluid. The ring body forms an annular sealed cavity, and the balance fluid fills a portion of the sealed cavity. The balance ring is then installed on the rotating gantry of the CT scanner, with the central axis of the balance ring coaxial with the rotation axis of the rotating gantry. Thus, when the rotating gantry rotates at high speed, the balance fluid will automatically flow to the lighter side due to centrifugal force, thereby balancing the eccentric load, ensuring imaging quality, and reducing the possibility of equipment wear and malfunction. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a CT scanner provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of the balance ring provided in an embodiment of this application;

[0028] Figure 3 A side view of the inner ring provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the internal structure of the balancing ring provided in an embodiment of this application.

[0030] Figure reference numerals:

[0031] 10. Balance ring;

[0032] 100, Ring body; 100a, Sealed cavity; 101a, Sub-cavity; 110, Inner ring; 120, Outer ring; 101, Inner sidewall;

[0033] 200, baffle; 200a, retention groove; 210, first plate; 220, second plate;

[0034] 300, deflector; 310, first end; 320, second end; 301, first side surface; 302, second side surface;

[0035] 400, partition plate; 400a, through hole;

[0036] 20. Rotating frame. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] As CT equipment develops and rotates at increasingly higher speeds, the gantry needs to rotate at high speeds during the scanning process. If the gantry is unbalanced, it will cause mechanical vibration, affecting image quality, increasing equipment wear, and even causing malfunctions.

[0039] In related technologies, counterweights of fixed mass are typically installed symmetrically to offset static unbalanced forces through a preset mass distribution. However, this method is suitable for initial static equilibrium but cannot adapt to dynamic mass changes (such as thermal deformation of the X-ray tube). It still affects imaging quality, increases equipment wear, and may even lead to malfunctions.

[0040] To address the aforementioned technical problems, this application proposes a CT scanner. Please refer to [link / reference needed]. Figures 1 to 2 It includes a balance ring 10 and a rotating frame 20, the rotating frame 20 having a mounting groove, and at least a portion of the balance ring 10 being located within the mounting groove.

[0041] The CT scanner also includes an X-ray tube, detector array, high-voltage generator, patient bed, and cooling system.

[0042] The rotating gantry 20 is a ring-shaped metal frame that integrates components such as X-ray tubes, detector arrays, and high-voltage generators. It drives the X-ray tubes and detectors to rotate at high speed around the patient (usually 0.5-2 revolutions / second) to achieve multi-angle scanning and provides structural support to ensure the mechanical stability of the scanning process.

[0043] The X-ray tube consists of a cathode (emitting electrons) and an anode (target material, such as tungsten), and is internally a vacuum environment that generates a high-energy X-ray beam that penetrates human tissue. The detector array includes thousands of scintillation crystals and photodiodes arranged in an arc to receive the X-rays that have penetrated the body, converting them into light signals, and then into electrical signals. It measures the attenuation data of X-rays at different angles to provide computer reconstruction of images. The high-voltage generator includes components such as a high-frequency inverter and a high-voltage transformer to provide high-voltage electricity (usually 50-140kV) to the X-ray tube, accelerating electrons to collide with the anode target. The patient bed is a height-adjustable and translational electric bed used to precisely control the patient's position and ensure that the scanning area is aligned with the center of the gantry.

[0044] The cooling system includes an oil circulation system, a heat exchanger, and a fan. It mainly dissipates heat from the X-ray tube and the high-voltage generator. The oil circulation system directly contacts high-temperature components (such as the X-ray tube anode), absorbing and transferring heat. The oil pump drives the cooling oil to flow through the heat dissipation channels of the X-ray tube and the high-voltage generator, absorbing heat from their surfaces. The high-temperature oil is then transported to the heat exchanger through pipelines. The fan forces airflow, accelerating the heat exchange between the heat exchanger surface and the environment, thereby cooling the hot oil. The cooled oil is then recirculated to nearby heat-generating components such as the X-ray tube anode and the high-voltage generator, waiting for further heat dissipation.

[0045] When an X-ray tube is in operation, the electron beam strikes the anode target (such as a tungsten target) at high speed, generating a large amount of heat (approximately 99% of the electrical energy is converted into heat). The target material, subjected to focused electron beam impact, can reach instantaneous temperatures exceeding 2000°C, far exceeding the heat resistance limits of conventional metals. Uneven heating of the material induces internal stress; for example, the temperature difference between the anode surface and its interior causes expansion differences. Although the cooling system tries to reduce the temperature, it cannot completely eliminate temperature variations. The material may undergo minute deformations during repeated heating and cooling, i.e., plastic deformation, resulting in uneven stress distribution across the entire rotating frame 20.

[0046] In this embodiment, the balance ring 10 includes a ring body 100 and a balance fluid. The ring body 100 forms an annular sealed cavity 100a. The balance fluid fills a portion of the sealed cavity 100a. The balance ring 10 is then mounted on the rotating gantry 20 of the CT scanner. The central axis of the balance ring 10 is coaxial with the rotation axis of the rotating gantry 20. Thus, when the rotating gantry 20 rotates at high speed, the balance fluid will automatically flow to the lighter side due to centrifugal force, thereby balancing the eccentric load, ensuring imaging quality, and reducing the possibility of equipment wear and malfunction.

[0047] It should be understood that the equilibrium liquid in the embodiments of this application is a high-density, low-volatility inert liquid, such as fluorinated liquid and high-density silicone oil. In the embodiments of this application, fluorinated liquid is used as the equilibrium liquid for illustrative purposes, and the volume of fluorinated liquid is 60%-70% of the volume of the sealed cavity 100a. High-density liquid provides greater mass in the same volume, thereby generating a stronger inertial damping effect and significantly improving the vibration energy absorption capacity.

[0048] Furthermore, by using fluorinated liquid as the balancing fluid, it is difficult to conduct electricity even in the event of a leak, thus ensuring the safety of the entire CT machine.

[0049] To prevent liquid leakage from corroding precision electronic components, the cavity of the balance ring 10 adopts a multi-layer sealing design with a metal and ceramic composite structure. Therefore, when the balance ring 10 is installed in the mounting groove, a damping pad is provided between the balance ring 10 and the rotating mechanism to reduce contact wear, thereby further ensuring the balance of the entire rotating frame 20.

[0050] The damping pad can be a silicone pad, a rubber pad, or a composite damping pad of silicone and carbon fiber, depending on the actual situation. It will not be explained in detail here. It should be understood that before the balance ring 10 is installed on the rotating frame 20, a flange needs to be machined on the outer edge of the balance ring 10 and connected to the rotating frame 20 by high-strength titanium alloy bolts.

[0051] The following will combine Figures 2 to 4 Further describing the balancing ring 10, the ring body 100 has an inner ring 110 and an outer ring 120 radially spaced along the ring body 100. The balancing ring 10 also includes a plurality of baffles 200, which are circumferentially spaced within the sealing cavity 100a and connected to the outer ring 120. A retention groove 200a is formed between the baffles 200 and the outer ring 120. Along a first preset direction, the opening of the retention groove 200a is located upstream of the retention groove 200a. Specifically, the openings of all retention grooves 200a face the same direction. Figure 2 The indicated orientation reference suggests that the openings of all retention tanks 200a are located upstream in a clockwise direction, i.e., the first preset direction is clockwise. In other embodiments, the openings of all retention tanks 200a may also be located upstream in a counterclockwise direction, i.e., the first preset direction is counterclockwise. It is understood that when the balance ring 10 rotates at high speed, the resulting centrifugal force can throw the balance liquid from the openings of the retention tanks 200a into the retention tanks 200a.

[0052] In the initial state, under the action of gravity, the balancing fluid is located at the bottom of the entire balancing ring 10. When the rotation speed of the balancing ring 10 is lower than the first preset value, the balancing fluid tends to accumulate at the bottom of the balancing ring 10 due to gravity and is not easily thrown up by the balancing ring 10. Since the entire rotating gantry 20 is unbalanced at this time, the CT machine does not perform imaging work. However, when the rotating gantry 20 rotates at a higher speed, the centrifugal force generated is sufficient to throw the balancing fluid to the lighter side of the rotating gantry 20, balancing the eccentric load of the rotating gantry 20. Therefore, imaging work begins at this time.

[0053] In this embodiment, by setting up a retention tank 200a, the balancing fluid is thrown into the retention tank 200a under the action of centrifugal force. The retention tank 200a can suppress the disordered flow of the liquid caused by inertia (such as eddies), so that the balancing fluid is kept as close as possible to the lighter side of the rotating frame 20 within the balance ring 10. This helps to ensure the balance and stability of various parts of the rotating frame 20 during rotation, thereby ensuring imaging quality. In addition, the retention tank 200a can also avoid dynamic imbalance caused by sudden and violent movement of the balancing fluid. Especially when the rotation speed changes, the balancing fluid in the retention tank 200a gradually adjusts its position, making the transition of the rotating frame 20 smoother and reducing the risk of impact.

[0054] It is also necessary to understand that since the balance ring 10 needs to switch from the initial low speed state to the high speed state, in the low speed state, the baffle 200 can be partially located at the lower part of the balance ring 10 and brought to the upper part of the balance ring 10. This allows the balance fluid to be quickly thrown to the lighter side of the rotating frame 20 when the balance ring 10 switches to high speed rotation, thereby quickly responding to the eccentric load of the rotating frame 20.

[0055] Following on from the above, please refer to Figure 2 as well as Figure 4 In one embodiment of this application, the balance ring 10 further includes a plurality of guide plates 300. The plurality of guide plates 300 are spaced apart circumferentially within the sealing cavity 100a along the ring body 100 and connected to the inner ring 110. The guide plate 300 has a first side 301 and a second side 302 facing each other along a first preset direction. The first side 301 is disposed facing the outer ring 120, and the second side 302 is disposed facing the inner ring 110.

[0056] Among them, a guide groove can be formed between two adjacent guide plates 300 and the inner ring 110, so as to Figure 2 As shown in the orientation reference, the balance ring 10 is divided into an upper half, a lower half, a left half, and a right half. In this embodiment, the balance ring 10 rotates clockwise, and the balance fluid located in the lower half can be transported to the upper half of the balance ring 10 through the guide groove, thereby enabling a rapid response to the eccentric load of the rotating frame 20.

[0057] It is understandable that when the balancing fluid reaches the right half, the balancing fluid will flow out from the guide channel, and at least part of it can flow into the retention tank 200a along the second side 302, thereby ensuring that the retention tank 200a adjacent to the guide plate 300 can hold a certain amount of balancing fluid, thereby ensuring a fast response to the eccentric load of the rotating frame 20.

[0058] Furthermore, multiple guide plates 300 are evenly spaced along the circumference of the ring body 100. The specific number of guide plates 300 can be set according to the diameter of the ring body 100. The larger the diameter of the ring body 100, the more guide plates need to be set so that the guide channel can transport the balance liquid located in the lower half to the upper half of the balance ring 10 in sufficient quantity, so that when the balance ring 10 rotates at high speed, it can quickly respond to the eccentric load of the rotating frame 20. For example, the number of guide plates 300 is 'a'. When the diameter of the ring body 100 is 970-1000mm, the value of 'a' can be in the range of 25≤a≤35, that is, the number of guide plates 300 can be 25, 28, 30, 32, 35 or any two of the above values; when the diameter of the ring body 100 is 980mm, the number of guide plates 300 'a' can be 28; when the diameter of the ring body 100 is 990mm, the number of guide plates 300 'a' can be 32.

[0059] In this embodiment, the first side 301 of the guide plate 300 faces the outer ring 120, and the second side 302 faces the inner ring 110. In this way, during the process of transporting the balance liquid in the lower half to the upper half of the balance ring 10 through the guide channel, the balance liquid is difficult to flow out of the guide channel. During the process of the balance liquid from the upper half to the lower half, under the influence of gravity, some of the balance liquid can be more easily guided by the relatively inclined first side 301 into the retention tank 200a, thereby ensuring a rapid response to the eccentric load of the rotating frame 20.

[0060] During the high-speed rotation of the balance ring 10, the balance fluid automatically flows towards the lighter side of the rotating frame 20 due to centrifugal force, thus balancing the eccentric load. The guide channel also accommodates some balance fluid, which helps suppress disordered flow (such as eddies) caused by inertia, thereby improving the stability of the entire rotating frame 20 and ensuring imaging quality. Furthermore, it works in conjunction with the balance fluid in the retention tank 200a to prevent dynamic imbalance caused by sudden and violent movement of the balance fluid. Especially when the rotational speed changes, the balance fluid in the guide channel and retention tank 200a gradually adjusts its position, making the transition of the rotating frame 20 smoother and reducing the risk of impact.

[0061] Furthermore, please refer to Figure 3Along the axial direction of the ring body 100, the guide plate 300 has a first end 310 and a second end 320 spaced apart. The arrangement direction of the first end 310 and the second end 320 is set at an angle to the axial direction of the ring body 100. Since the first side 301 of the guide plate 300 faces the outer ring 120 and the second side 302 faces the inner ring 110, the guide plate 300 is twisted. This increases the area of ​​the second side 302, extends the travel path of the balancing liquid on the second side 302, and further extends the storage time of the balancing liquid in the guide groove, reduces the flow rate of the balancing liquid falling between the guide plate and the baffle, and thus ensures that the volume of the balancing liquid in this area remains approximately unchanged. Ultimately, this enables the balance ring 10 to ensure a rapid response to the eccentric load of the rotating frame 20.

[0062] Optionally, the angle between the arrangement direction of the first end 310 and the second end 320 and the axial direction of the ring body 100 is α, wherein α satisfies: 15°≤α≤30°, that is, α can be any two values ​​between 15°, 20°, 25°, 30° or above. By keeping α within the above range, excessive concentration of the balancing fluid towards the first end 310 or the second end 320 can be avoided, thereby ensuring the dynamic balance of the entire rotating frame 20.

[0063] Furthermore, along the radial direction of the ring body 100, the minimum distance between the guide plate 300 and the baffle 200 is h1, where 3mm≤h1≤10mm, that is, h1 can be a value between any two ranges of 3mm, 5mm, 7mm, 10mm or above. By ensuring that h1 is within the above range, the value of h1 is appropriate, ensuring that when the balance ring 10 switches from low-speed rotation to high-speed rotation, the balance fluid can quickly flow from the gap between the guide plate 300 and the baffle 200, thereby achieving rapid adaptive dynamic balance of the rotating frame 20.

[0064] In addition, by using a suitable gap between the guide plate 300 and the baffle 200, the balance liquid flowing out of the guide channel can flow into the retention tank 200a as much as possible, thereby ensuring that the volume of the balance liquid in this area remains approximately unchanged, so that the balance ring 10 can ensure a rapid response to the eccentric load of the rotating frame 20.

[0065] Optionally, the ring body 100 has two inner sidewalls 101 spaced apart along the axial direction of the ring body 100, and the guide plate 300 abuts against the two inner sidewalls 101 at both ends along the axial direction of the ring body 100.

[0066] By having the two ends of the guide plate 300 abut against the inner sidewall 101, the balance liquid in the guide channel is difficult to flow axially from inside the guide channel to outside the guide channel, thereby effectively controlling the flow path of the balance liquid in the guide channel, so that the balance liquid flows into the adjacent retention tank 200a as much as possible, thereby ensuring that the volume of the balance liquid in this area remains approximately unchanged, so that the balance ring 10 can ensure a rapid response to the eccentric load of the rotating frame 20.

[0067] In addition, in one embodiment, the baffle 200 also abuts against the two inner sidewalls 101 at both ends along the axial direction of the ring body 100. In this way, the balance liquid in the retention tank 200a is also difficult to flow from the inside of the guide tank to the outside of the guide tank along the axial direction, reducing the possibility of disordered flow of the balance liquid. This ensures that the volume of the balance liquid in this area remains approximately unchanged, so that the balance ring 10 can ensure a rapid response to the eccentric load of the rotating frame 20, and ultimately ensure the imaging quality.

[0068] Please refer to some embodiments of this application. Figure 2 as well as Figure 4 It also includes multiple cavity plates 400, which are spaced apart in the sealing cavity 100a along the circumference of the ring body 100 and connected to the ring body 100 to divide the sealing cavity 100a into multiple sub-cavities 101a. The cavity plates 400 are provided with through holes 400a that connect two adjacent sub-cavities 101a.

[0069] The aperture of the through hole 400a is 2mm to 3mm. With the through hole 400a, when the balance ring 10 rotates at low speed, part of the groove opening of the retention groove 200a will face the lower part of the sealing cavity 100a. Since the centrifugal force is low at this time, the balance fluid will fall under the action of gravity. When passing through the relatively small aperture of the through hole 400a, the balance fluid forms a local vortex in the sub-cavity 101a near the through hole 400a, which increases the flow resistance and suppresses the overall movement, thereby ensuring that the volume of the balance fluid in this area remains approximately unchanged. This makes it easier to ensure that the mass distribution of the entire rotating frame 20 is uniform, so that the balance fluid in the balance ring 10 can quickly respond to the eccentric load of the rotating frame 20, and ultimately ensure the imaging quality.

[0070] Furthermore, due to the presence of the partition plate 400, the sub-cavity 101a can suppress the disordered flow of liquid caused by inertia (such as eddies), which is beneficial to the stability of the entire rotating frame 20 and thus ensures imaging quality.

[0071] In some of these embodiments, please refer to Figure 2The baffle 200 includes a first plate 210 and a second plate 220. The first plate 210 is connected to the outer ring 120, and the second plate 220 is connected to the end of the first plate 210 away from the outer ring 120 and is opposite to and spaced apart from the outer ring 120. Along a first preset direction, the second plate 220 is located upstream of the first plate 210, and the retention groove 200a is formed between the second plate 220, the first plate 210 and the outer ring 120.

[0072] The angle between the side of the first plate 210 facing the retention tank 200a and the side of the second plate 220 facing the retention tank 200a is β, where β satisfies: 80°≤β≤100°. Specifically, β can be any two values ​​between 80°, 90°, 100° or above. With β within the above range, the retention tank 200a can store the balancing fluid well when the balance ring 10 is rotating at low speed, avoiding an excessively large opening. When the opening faces the bottom of the sealing cavity 100a, the balancing fluid in the retention tank 200a will quickly flow out of the opening, causing agitation, which is detrimental to the balance of the rotating frame 20.

[0073] Since the retention tank 200a can store the balancing fluid well, when the rotating frame 20 becomes unbalanced, the angle β between the side of the first plate 210 facing the retention tank 200a and the side of the second plate 220 facing the retention tank 200a is appropriate, that is, the size of the tank opening is appropriate. Therefore, the balancing fluid in the retention tank 200a can automatically and quickly flow to the lighter side under the action of centrifugal force, which can respond to the imbalance of the rotating frame 20 in a timely manner, thereby ensuring the imaging quality.

[0074] Furthermore, since the angle β between the side of the first plate 210 facing the retention tank 200a and the side of the second plate 220 facing the retention tank 200a is appropriate, the retention tank 200a with a suitable opening can hold a relatively large amount of balancing liquid compared to the retention tank 200a with a relatively small opening. Thus, when the balancing ring 10 rotates at low speed, the balancing liquid outside the retention tank 200a can automatically flow to the lighter side under the centrifugal force generated by the balancing ring 10, realizing the adaptive dynamic balance of the rotating frame 20 under the low speed state of the balancing ring 10.

[0075] Optionally, the first plate 210 and the second plate 220 are integrally formed, which ensures the structural strength of the baffle 200 and improves the installation efficiency of the entire balance ring 10.

[0076] Based on the previous embodiment, along the direction perpendicular to the first plate 210, the depth of the retention groove 200a is h2, where h2 satisfies: 5mm≤h2≤8mm. Optionally, h2 can be a value between any two of 5mm, 6mm, 7mm, 8mm or more. A retention groove 200a of suitable depth can hold enough balancing fluid. Thus, when the balancing ring 10 switches from low-speed rotation to high-speed rotation, the balancing fluid in the retention groove 200a can quickly respond to the eccentric load of the rotating gantry 20, thereby ensuring the imaging quality of the CT machine.

[0077] In one embodiment of this application, the distance between two adjacent baffles 200 along the circumference of the ring body 100 is h3, where h3 satisfies: 40mm≤h3≤60mm. Optionally, h2 can be a value between any two of 5mm, 6mm, 7mm, 8mm or more. When the rotating frame 20 becomes unbalanced, the appropriate distance between the two adjacent baffles 200 allows the equilibrium liquid in the retention tank 200a to flow out quickly between the two baffles 200 under centrifugal force, i.e., it can automatically and quickly flow to the lighter side and respond promptly to the imbalance of the rotating frame 20, thereby ensuring imaging quality.

[0078] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A balancing ring, characterized in that, The balance ring is used in a CT scanner, which includes a rotating gantry. The balance ring is mounted on the rotating gantry, and its central axis is coaxial with the rotation axis of the rotating gantry. The balance ring includes: The ring body has an annular sealing cavity, and the ring body has an inner ring and an outer ring that are radially spaced along the ring body. A balancing fluid, filling a portion of the sealed cavity, the balancing fluid being able to flow within the sealed cavity as the rotating frame rotates; and Multiple baffles are spaced apart along the circumference of the ring body within the sealing cavity, the baffles comprising: A first plate, the first plate being connected to the outer ring; and The second plate is connected to the end of the first plate away from the outer ring and is positioned opposite and spaced apart from the outer ring. Along a first preset direction, the second plate is located upstream of the first plate, and a retention groove is formed between the second plate, the first plate, and the outer ring.

2. The balance ring according to claim 1, characterized in that, Along the first preset direction, the opening of the retention groove is located upstream of the retention groove.

3. The balancing ring according to claim 1, characterized in that, The balance ring also includes multiple guide plates, which are spaced apart circumferentially within the sealing cavity and connected to the inner ring. Each guide plate has a first side and a second side opposite to each other along the first preset direction. The first side faces the outer ring, and the second side faces the inner ring.

4. The balancing ring according to claim 3, characterized in that, Along the axial direction of the ring body, the guide plate has a first end and a second end opposite to each other. The angle between the arrangement direction of the first end and the second end and the axial direction of the ring body is α, wherein α satisfies: 15°≤α≤30°. And / or, along the radial direction of the ring body, the minimum distance between the guide plate and the baffle is h1, where 3mm≤h1≤10mm.

5. The balancing ring according to claim 3, characterized in that, The ring body has two inner sidewalls spaced apart along the axial direction of the ring body, and the guide plate abuts against the two inner sidewalls at both ends along the axial direction of the ring body.

6. The balancing ring according to claim 1, characterized in that, It also includes multiple cavity plates, which are spaced apart in the sealing cavity along the circumference of the ring body and connected to the ring body to divide the sealing cavity into multiple sub-cavities. The cavity plates are provided with through holes that connect two adjacent sub-cavities. And / or, the ring body has two inner sidewalls spaced apart along the axial direction of the ring body, and the baffle abuts against the two inner sidewalls at both ends along the axial direction of the ring body.

7. The balance ring according to claim 1, characterized in that, in, The angle between the side of the first plate facing the retention groove and the side of the second plate facing the retention groove is β, and β satisfies: 80°≤β≤100°.

8. The balance ring according to claim 7, characterized in that, Along the direction perpendicular to the first plate, the depth of the retention groove is h2, and h2 satisfies: 5mm≤h2≤8mm; And / or, along the circumference of the ring body, the distance between two adjacent baffles is h3, where h3 satisfies: 40mm≤h3≤60mm.

9. A CT scanner, characterized in that, The device includes the balance ring as described in any one of claims 1 to 8 and the rotating frame, wherein the rotating frame is formed with a mounting groove, and at least a portion of the balance ring is located within the mounting groove.

10. The CT scanner according to claim 9, characterized in that, A damping pad is provided between the balance ring and the rotating frame.

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