Abrasion powder collection device and CT apparatus

Abstract

To efficiently recover abrasion powder.SOLUTION: A wear debris collection device according to the present embodiment includes a dust collection device and an airflow passage. The dust collector has a dust collecting box provided in the vicinity of a brush base plate which is provided in a frame fixing part of the CT apparatus and supports a brush column, and a dust collecting fan communicating with the inside of the dust collecting box. The airflow passage is disposed on the brush base plate such that one end of the airflow passage is connected to the dust collector and the other end of the airflow passage is located near at least one of the brush post and the pin. When the dust collection fan operates, an airflow flowing from the vicinity of at least one of the brush post and the pin into the dust collection box is formed in the airflow passage. According to the present embodiment, by the operation of the dust collection fan, an air flow for moving the abrasion powder from the surface of the brush board into the dust collection box is formed in the vicinity of at least one of the brush column and the pin, and the abrasion powder accumulated in the vicinity of at least one of the brush column and the pin is reduced, so that the risk of short circuit between the W-phase, the V-phase, and the U-phase can be reduced.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The embodiments disclosed in this specification and drawings relate to a wear debris collection device and a CT device. [Background technology]

[0002] Medical devices use communication systems that rotate and transmit power and signals. The communication system includes a rotating part, a fixed part that rotatably supports the rotating part, an electric brush fixed to the fixed part, and a slip ring provided on the rotating part. For example, the communication system is applied to an X-ray computed tomography (CT) device. In the communication system, power and signals are transmitted between the rotating part and the fixed part by contacting the electric brush with the slip ring. When power and signals are transmitted by contacting the electric brush with the slip ring in the communication system, friction between the electric brush and the slip ring can generate wear powder.

[0003] When wear debris is generated, it can cause defects. For example, when wear debris scatters onto the substrate inside the rack, it can cause a short circuit in the electrical circuit. Therefore, technology that can efficiently collect wear debris is required. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Chinese Patent Application Publication No. 115778417 Summary of the Invention [Problem to be solved by the invention]

[0005] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to efficiently collect wear debris. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described below can also be positioned as other problems. [Means for solving the problem]

[0006] The wear debris collection device according to this embodiment includes a dust collector and an airflow passage. The dust collector includes a dust collection box provided near a brush base plate that is attached to a CT scanner frame fixed portion and supports a brush post, and a dust collection fan that communicates with the interior of the dust collection box. The airflow passage is connected to the dust collector at one end and is disposed on the brush base plate so that the other end is located near at least one of the brush post and the pin. When the dust collection fan is operated, an airflow is formed in the airflow passage that flows from near at least one of the brush post and the pin into the dust collection box. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a configuration diagram of a CT device to which a wear debris collecting device according to this embodiment is applied. [Figure 2A] Figure 2A is a schematic diagram showing, as a reference example, two different airflow directions and different accumulation positions of wear powder inside the brush substrate under the action of a wear powder collection device, showing a case where the airflow direction is parallel to the arrangement direction of the W phase, V phase, and U phase of the brush substrate. [Figure 2B] FIG. 2B shows a case where the airflow direction is perpendicular to the arrangement direction of the W-phase, V-phase, and U-phase of the brush substrate. [Figure 3] FIG. 3 is a schematic diagram showing the direction of airflow and the location of accumulation of abrasion powder within the brush base plate under the action of the abrasion powder collecting device according to the first embodiment. [Figure 4] FIG. 4 is another schematic diagram showing the airflow direction and the accumulation position of abrasion powder in the brush base plate under the action of the abrasion powder collecting device according to the first embodiment. [Figure 5] FIG. 5 is an assembly diagram of the wear debris collecting device according to the first embodiment. [Figure 6] FIG. 6 is an assembly diagram showing the wear debris collecting device according to the first embodiment attached to the brush base plate. [Figure 7] FIG. 7 is a diagram illustrating an operation state of the wear debris collecting device according to the first embodiment. [Figure 8A] FIG. 8A is a configuration diagram of a wear debris collecting device according to the second embodiment. [Figure 8B] FIG. 8B is another configuration diagram of the wear debris collecting device according to the second embodiment. [Figure 9] FIG. 9 is a schematic diagram showing the configuration of a wear debris collecting device according to the third embodiment. [Figure 10] FIG. 10 is a configuration diagram of a wear debris collecting device according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present embodiment will be described below based on the embodiments shown in the drawings. The embodiments disclosed herein are merely illustrative and are not limiting. The scope of the present embodiment is limited only by the claims, not the description of the following embodiments, and further includes all modifications within the scope of the spirit and concept equivalent to the claims.

[0009] 1 is a configuration diagram of a CT device 300 to which a wear debris collection device according to this embodiment is applied. The CT device 300 collects CT image data of a subject. Specifically, the CT device 300 rotates an X-ray tube and an X-ray detector around the subject, detects X-rays that have passed through the subject, and collects projection data. The CT device 300 then generates CT image data based on the collected projection data.

[0010] The CT device 300 comprises a rotating part that rotates the X-ray tube and X-ray detector, a fixed part (mounting fixed part) that rotatably supports the rotating part, a slip ring provided on the rotating part, and an electric brush module 200 provided on the fixed part.

[0011] The electric brush module 200 includes a brush substrate 1 and a brush post 11, which is an electric brush. The brush substrate 1 is provided on a fixed part. The brush post 11 is attached to the brush substrate 1.

[0012] The brush posts 11 contact the slip ring to transmit power and signals by three-phase AC. Specifically, the brush posts 11 are arranged at intervals in the W, V, and U phases of the brush substrate 1, and transmit power and signals by maintaining a phase shift of, for example, 1 / 3 cycle (120 degrees) of a sinusoidal current in three-phase AC.

[0013] When the brush posts 11 contact the slip ring to transmit power and signals, friction between the brush posts 11 and the slip ring can generate wear particles. For this reason, the electric brush module 200 further includes a wear particle collector 100.

[0014] The wear debris collecting device 100 includes a dust collection fan 4 and a dust collection box 3. The wear debris collecting device 100 collects as much wear debris 13 scattered on the brush substrate 1 as possible into the dust collection box 3 by the airflow generated when the dust collection fan 4 is operating.

[0015] 2A and 2B are schematic diagrams showing, as a reference example, two different airflow directions and different accumulation positions of abrasion powder within the brush substrate 1 under the action of the abrasion powder collecting device.

[0016] 2A and 2B, the brush post 11 in FIG. 1 is supported by the brush substrate 1. For example, the brush post 11 is supported by the brush substrate 1 by penetrating the brush substrate 1 from the surface (front surface) of the brush substrate 1 and being exposed on the back surface of the brush substrate 1. The end of the brush post 11, other than the tip that comes into contact with the slip ring, is exposed on the back surface of the brush substrate 1.

[0017] Further, the brush posts 11 are provided for the W-phase, V-phase, and U-phase of the brush substrate 1. For example, on the brush substrate 1, the brush posts 11 for the W-phase, V-phase, and U-phase are arranged spaced apart in the axial direction of the rotating part. Further, a plurality of W-phase brush posts 11 are provided on the brush substrate 1, and the plurality of W-phase brush posts 11 are arranged spaced apart in the circumferential direction of the rotating part. Similarly, a plurality of V-phase brush posts 11 are provided on the brush substrate 1, and the plurality of V-phase brush posts 11 are arranged spaced apart in the circumferential direction of the rotating part. Similarly, a plurality of U-phase brush posts 11 are provided on the brush substrate 1, and the plurality of V-phase brush posts 11 are arranged spaced apart in the circumferential direction of the rotating part.

[0018] Furthermore, pins 12 for transmitting power and signals from the control device of the CT device 300 to the brush posts 11 are provided on the W-phase, V-phase, and U-phase of the brush substrate 1.

[0019] A dust collection box 3 is attached to the back surface of the brush substrate 1 (see Figure 6). A dust collection fan 4 is attached to the dust collection box 3, and the dust collection box 3 collects abrasion powder 13 scattered on the brush substrate 1 by the airflow generated when the dust collection fan 4 is operating (see Figure 7).

[0020] Here, the relationship between the airflow direction and the dust collection efficiency (dust collection rate) of the wear debris 13 will be described with reference to FIGS. 2A and 2B.

[0021] In the example shown in Fig. 2A, the airflow direction is parallel to the arrangement direction of the W-, V-, and U-phases on the brush substrate 1, and the dust collection rate is higher than 80%. However, in the example shown in Fig. 2A, wear particles 13 tend to accumulate along the area indicated by the arrows on the back surface of the brush substrate 1, particularly between adjacent brush columns 11 and near the pins 12. This can cause electrical conduction between the W-, V-, and U-phases or reduce interphase resistance, creating a risk of discharge breakdown and other problems.

[0022] In the example shown in Fig. 2B, the airflow direction is perpendicular to the arrangement direction of the W, V, and U phases on the brush substrate 1, making it less likely for wear debris 13 to accumulate between the W, V, and U phases and reducing the likelihood of electrical conduction between the different phases, making it safer. However, in the example shown in Fig. 2B, the wear debris 13 cannot be collected by the brush substrate 1, which is the source of the wear debris, and most of it accumulates on the upper side of the brush column 11, resulting in a dust collection rate of less than 50%.

[0023] Therefore, a technology is required that can improve the air flow and air flow passage of the wear debris collection device to avoid short circuits caused by the wear debris 13 accumulated between the W, V, and U phases, and also to efficiently collect the wear debris 13.

[0024] To meet this requirement, the wear debris collection device 100 of this embodiment includes a dust collector and an airflow passage. The dust collector includes a dust collection box provided near the brush base plate 1, which is attached to the mount fixed portion of the CT scanner 300 and supports the brush post 11, and a dust collection fan communicating with the interior of the dust collection box. The airflow passage is connected to the dust collector at one end and disposed on the brush base plate 1 so that the other end is located near at least one of the brush post 11 and the pin 12. Operation of the dust collection fan generates an airflow in the airflow passage that flows from near at least one of the brush post 11 and the pin 12 into the dust collection box. According to this embodiment, operation of the dust collection fan generates an airflow that moves wear debris from the surface (front surface) of the brush base plate near at least one of the brush post 11 and the pin 12 into the dust collection box. This reduces the amount of wear debris accumulated near at least one of the brush post 11 and the pin 12, thereby reducing the risk of short circuits between the W, V, and U phases.

[0025] In this case, the wear debris collecting device 100 may be embodied in the following four embodiments.

[0026] (First embodiment) Fig. 6 is an assembly diagram of the wear debris collecting device 100 according to the first embodiment mounted on the brush substrate 1. Fig. 7 is a diagram showing the operation of the wear debris collecting device 100 according to the first embodiment.

[0027] 6 and 7, the wear debris collecting device 100 includes a dust collecting device 110, a plurality of air suction tubes 2, and a plurality of air flow passages 120. The dust collecting device 110 includes a dust collecting box 3, a dust collecting fan 4, and a filter 5. The air suction tube 2 is an example of an "air tube."

[0028] 6, the brush substrate 1 has a through hole H formed therethrough in the thickness direction of the brush substrate 1 so as to retract the layout of the brush substrate 1. A suction nozzle 21 is provided near at least one of the brush posts 11 and the pins 12 of the brush substrate 1. For example, one end of each air suction tube 2 forms a suction nozzle 21 that penetrates the through hole H near at least one of the brush posts 11 and the pins 12 of the brush substrate 1. Each suction nozzle 21 is provided near the brush posts 11 and the pins 12 on the brush substrate 1 at a position where wear powder 13 is likely to accumulate.

[0029] 6 and 7, the other end of each air suction tube 2 is connected to the inside of a dust collection box 3 attached to the back side of the brush substrate 1. The dust collection box 3 is connected to a dust collection fan 4. For example, the dust collection box 3 is disposed on a fixed portion of the gantry of the CT scanner 300, and is provided near the brush substrate 1 that supports the brush pillar 11. The dust collection fan 4 is connected to the inside of the dust collection box 3.

[0030] 6, each suction nozzle 21 is connected to the dust collection box 3 via an air suction tube 2 that passes through a through-hole H along the thickness direction of the brush substrate 1, and as shown in Fig. 7, an air flow passage 120 is formed inside each air suction tube 2. Specifically, the air flow passage 120 is arranged on the brush substrate 1 so that one end is connected to the dust collection device 3 and the other end is located near at least one of the brush post 11 and the pin 12.

[0031] By operating the dust collection fan 4, an air current that flows from the vicinity of at least one of the brush column 11 and the pin 12 into the dust collection box 3 is formed in the air flow passage 120. For example, by operating the dust collection fan 4, a unidirectional air current is formed in the air flow passage 120 that flows from the suction nozzle 21 through the air suction tube 2 toward the dust collection box 3, and an air current is formed that sucks the abrasion powder 13 into the dust collection box 3 through the air suction tube 2 and discharges it into the atmosphere.

[0032] Furthermore, a filter 5 is installed at the point where the dust collection box 3 and the dust collection fan 4 communicate with each other and inside the dust collection box 3 to prevent abrasion powder 13 from entering the dust collection fan 4 .

[0033] 3 and 4 are schematic diagrams showing the direction of airflow and the accumulation position of abrasion powder 13 in the brush substrate 1 under the action of the abrasion powder collecting device 100 according to the first embodiment.

[0034] 3 and 4, the air suction tube 2 is provided at an angle of 45° diagonally above each brush pillar 11 and in the vicinity of each pin 12 or between two adjacent pins 12.

[0035] Here, a suction nozzle 22 with a slanted opening is formed as the suction nozzle 21 in the air suction tube 2 provided at an angle of 45° diagonally above the brush pillar 11. That is, the suction nozzle 22 with a slanted opening is disposed at an angle of 45° diagonally above the brush pillar 11. For example, the suction nozzle 22 with a slanted opening protrudes from the surface (front surface) of the brush substrate 1, and the inclined surface (opening direction) of the suction nozzle 22 with a slanted opening is directed toward the corresponding brush pillar 11, and mainly sucks in wear powder 13 accumulated on the upper side of the brush pillar 11.

[0036] In addition, the air suction tube 2 provided near the pin 12 or between two adjacent pins 12 has a suction nozzle 23 with a flat opening formed as the suction nozzle 21. The end face of the suction nozzle 23 with the flat opening does not protrude from the surface (front surface) of the brush substrate 1, and it mainly sucks in wear powder 13 near the pins 12.

[0037] FIG. 5 is an assembly diagram of the wear debris collector 100 according to the first embodiment. Referring to FIG. 5, the dust collection box 3 includes a box body 31 and a box lid 32 made of sheet metal with an air outlet formed therein. The box body 31 and the air suction tube 2 are sealed and connected by an insulating material, which may be an insulating resin material, or are integrally molded from an insulating material. The dust collection fan 4 is attached to the box lid 32 so that its air inlet communicates with the interior of the dust collection box 3, specifically, communicates with the air outlet of the box lid 32, and the air outlet faces the atmosphere.

[0038] When the dust collection fan 4 is in operation, it continuously sucks in and accumulates the wear debris 13 in the filter 5, thereby reducing the dispersion of the wear debris 13 from its source as much as possible. In the remaining areas away from the vicinity of the pins 12 and brush posts 11, the risk of short circuits is reduced even if the wear debris 13 accumulates partially.

[0039] According to the above embodiment, the operation of the dust collection fan 4 creates an airflow that moves wear powder 13 from the surface (front side) of the brush substrate 1 into the dust collection box 4 near at least one of the brush pillar 11 and the pin 12, and by reducing the wear powder 13 accumulated near at least one of the brush pillar 11 and the pin 12, the risk of short circuits between the W phase, V phase, and U phase can be reduced.

[0040] (Second embodiment) FIG. 8A is a configuration diagram of a wear debris collecting device 100 according to the second embodiment.

[0041] 8A, the wear debris collecting device 100 includes a dust collecting device 110, a plurality of air suction tubes 2, and a plurality of air flow passages 120. The dust collecting device 110 includes a dust collecting box 3, a dust collecting fan 4, and a filter 5. The air suction tube 2 is an example of an "air tube."

[0042] In the second embodiment, the air flow passage 120, the filter 5, and the pins 12 are not shown. Also, in the second embodiment, the air suction tube 2 provided near the pin 12 or between two adjacent pins 12, and the suction nozzle 21 (suction nozzle 23 with a flat opening) formed on the air suction tube 2 are not shown. Also, in the second embodiment, a suction nozzle 22 with an oblique opening formed near the brush post 11 is shown as the suction nozzle 21.

[0043] The air suction tubes 2 are formed at one end thereof on the surface (front surface) of the brush substrate 1 with suction nozzles 21 arranged along the air suction tubes 2, and each suction nozzle 21 is provided near at least one of the brush posts 11 and the pins 12 of the brush substrate 1. The other ends of the air suction tubes 2 communicate with the interior of dust collection boxes 3 attached to the side surfaces of the brush substrate 1. The dust collection boxes 3 are connected to a dust collection fan 4. Specifically, each suction nozzle 21 is connected to the dust collection box 3 via the air suction tubes 2 extending along the surface (front surface) of the brush substrate 1, and an air flow passage 120 is formed inside the air suction tubes 2.

[0044] When the dust collection fan 4 is operated, a unidirectional airflow is formed in the airflow passage 120, flowing from the suction nozzle 21 through the air suction tube 2 toward the dust collection box 3, thereby creating an airflow that sucks the wear debris 13 into the dust collection box 3 via the air suction tube 2 and discharges it into the atmosphere. Filters 5 are installed at the points where the dust collection box 3 and the dust collection fan 4 communicate, and inside the dust collection box 3, to prevent the wear debris 13 from entering the dust collection fan 4.

[0045] The second embodiment differs from the first embodiment in that the dust collection box 3 is provided on the side of the brush substrate 1 rather than on the back side, and the dust collection box 3 is connected to each suction nozzle 21 through air suction tubes 2 that extend in the arrangement direction of the W-phase, V-phase, and U-phase on the front surface (front face) of the brush substrate 1. This structure has the advantage of not increasing the dimension of the brush substrate 1 in the thickness direction.

[0046] 8B, as a modification of the second embodiment, the suction nozzles 21 arranged along the air suction tube 2 have openings whose dimensions gradually increase with increasing distance from the air inlet of the dust collection fan 4. In order to balance the suction performance of each suction nozzle 21 as much as possible, the openings of the suction nozzles 21 are gradually increased with increasing distance from the air inlet of the dust collection box 3 along the suction route of the air suction tube 2, thereby achieving the effect of suctioning wear powder 13 in a balanced manner among the W, V, and U phases.

[0047] (Third embodiment) FIG. 9 is a structural schematic diagram of a wear debris collecting device 100 according to the third embodiment.

[0048] 9, the wear debris collecting device 100 includes a dust collecting device 110, a plurality of air blowing tubes 6, and a plurality of air flow passages 120. The dust collecting device 110 includes a dust collecting box 3, a dust collecting fan 4, and a filter 5. The air blowing tube 6 is an example of an "air tube."

[0049] In the third embodiment, the airflow passage 120, the filter 5, and the pins 12 are not shown. Also, in the third embodiment, the air blowing tube 6 provided near the pin 12 or between two adjacent pins 12, and the suction nozzle 21 (suction nozzle 23 with a flat opening) formed on the air blowing tube 6 are not shown.

[0050] One end of the air blowing tube 6 is formed on the surface (front surface) of the brush substrate 1, with blowing nozzles 61 arranged along the air blowing tube 6, and each blowing nozzle 61 is provided near at least one of the brush posts 11 and pins 12 of the brush substrate 1. The other end of the air blowing tube 6 is connected to the air outlet 42 of the dust collection fan 4 via the air blowing tube 6 extending along the surface (front surface) of the brush substrate 1. Each blowing nozzle 61 is provided near the brush posts 11 and pins 12 on the brush substrate 1, at a position where wear powder 13 is likely to accumulate.

[0051] The dust collection box 3 has a dust collection port 33 connected to the side of the brush base plate 1. The air inlet 41 of the dust collection fan 4 is connected to the dust collection box 3. When operating, the dust collection fan 4 generates an airflow for sucking the wear powder 13 into the dust collection port 33, and also generates an airflow for blowing away the wear powder 13 accumulated on the brush base plate 1 with a blowing nozzle 61. A filter 5 is installed at the point where the dust collection box 3 and the dust collection fan 4 communicate, and inside the dust collection box 3, to prevent the wear powder 13 from entering the dust collection fan 4.

[0052] When the dust collection fan 4 is operating, a circulating airflow is formed within the airflow passage 120, passing sequentially through the air blowing tube 6, the blowing nozzle 61, the surface (front surface) of the brush substrate 1, and the dust collection box 3. Specifically, an airflow is formed on the surface of the brush substrate 1 toward the dust collection port 33. This airflow sucks abrasion debris 13 accumulated on the surface of the brush substrate 1 into the dust collection box 3 and filters it through the filter 5. The abrasion debris 13 accumulates in the filter 5. The filtered airflow returns to the surface of the brush substrate 1 through the air blowing tube 6 and is blown onto the upper sides of the brush posts 11 of the W-, V-, and U-phases through the blowing nozzles 61, blowing away the abrasion debris 13 adhering to the brush posts 11 and their vicinity. At the same time, the filtered airflow is blown near the pins 12 or between two adjacent pins 12 through the blowing nozzles 61, blowing away the abrasion debris 13 adhering to the pins 12 and their vicinity. As described above, the blowing nozzle 61 is provided in a position where the wear powder 13 is likely to accumulate near at least one of the brush posts 11 and pins 12 of the brush substrate 1, and therefore, by blowing away the wear powder 13, it is possible to make it difficult for the wear powder 13 to accumulate. The wear powder 13 blown away by the blowing nozzle 61 is continuously sucked into the dust collection box 3 along with the airflow on the surface of the brush substrate 1 toward the dust collection port 33.

[0053] The circulating airflow created when the dust collection fan 4 is operated reduces the dispersion of the wear powder 13 from its source as much as possible, and even if the wear powder 13 partially accumulates in areas away from the brush column 11 and pin 12, the risk of a short circuit is reduced.

[0054] (Fourth embodiment) FIG. 10 is a structural diagram of a wear debris collecting device 100 according to the fourth embodiment.

[0055] 10, the wear debris collecting device 100 includes a dust collector 110, two insulating plates 7, and three airflow passages 120. The dust collector 110 includes a dust collection box 3, a dust collection fan 4, and a filter 5.

[0056] In the fourth embodiment, the airflow passage 120, the filter 5, and the pin 12 are not shown.

[0057] The two insulating plates 7 are provided on the brush substrate 1 on the side from which the brush pillar 11 protrudes, and isolate at least one of the brush pillar 11 and the pin 12 in accordance with the rules for insulating between the W, V, and U phases.

[0058] Three airflow passages 120 are formed between the insulating plate 7 and the brush column 11, and between the insulating plates 7, respectively positioned in the W phase, V phase, and U phase. Both ends of the airflow passage 120 are positioned on both the front and rear sides of the brush substrate 11 in the operating direction of the rotating part of the CT device 300. Usually, the front and rear sides in the operating direction of the rotating part of the CT device 300 correspond to the top and bottom sides of the brush substrate 11.

[0059] The dust collection box 3 is provided above or below the brush substrate 1 and has a dust collection port 34. The dust collection box 3 communicates with one end of the airflow passage via the dust collection port 34. The dust collection fan 4 is attached to the dust collection box 3, and operation of the dust collection fan 4 creates a unidirectional airflow within the airflow passage 120 that flows from the surface (front side) of the brush substrate 1 toward the dust collection box 3, thereby creating an airflow that sucks abrasion powder 13 into the dust collection box 3 through the dust collection port 34 and also discharges it into the atmosphere. A filter 5 (not shown) is installed at the point where the dust collection box 3 and the dust collection fan 4 communicate, and inside the dust collection box 3, to prevent abrasion powder 13 from entering the dust collection fan 4.

[0060] When the dust collection fan 4 is operating, air flows through the airflow passage into the dust collection box 3, and the abrasion debris 13 is continuously sucked into the filter 5, thereby minimizing the diffusion of the abrasion debris 13 from its source. Even if a phenomenon occurs in which abrasion debris 13 accumulates between adjacent brush columns 11 and causes electrical conduction, this occurs only between brush columns 11 of the same phase, reducing the risk of a decrease in interphase resistance between the U, V, and W phases.

[0061] The insulating plate 7 may be made of an insulating resin material.

[0062] According to the above four embodiments, a person skilled in the art can easily obtain a CT device 300 equipped with the above four types of wear debris collecting device 100.

[0063] According to at least one of the embodiments described above, wear debris can be efficiently collected.

[0064] Although several embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations of embodiments can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as set forth in the claims. [Explanation of symbols]

[0065] 1 Brush board 3 Dust collection box 4 Dust collection fan 11 Brush Pillar 12-pin 100 Wear debris collection device 110 Dust collector 120 Air flow passage 300 CT equipment

Claims

1. a dust collection device including a dust collection box provided in the vicinity of a brush base plate that is provided on a gantry fixing portion of the CT device and that supports the brush columns, and a dust collection fan that communicates with the inside of the dust collection box; an airflow passage disposed on the brush base plate such that one end is connected to the dust collecting device and the other end is located near at least one of the brush column and the pin; Equipped with By operating the dust collection fan, an airflow is formed in the airflow passage, which flows from the vicinity of at least one of the brush column and the pin into the dust collection box. Wear debris collection device.

2. a suction nozzle is provided near at least one of the brush column and the pin, a through hole is provided in the brush substrate, each of the suction nozzles is connected to the dust collection box via an air tube that passes through the through hole along the thickness direction of the brush substrate, and the air flow passage is formed inside the air tube; When the dust collection fan is operated, a unidirectional airflow is formed in the airflow passage, the airflow flowing from the suction nozzle through the air tube to the dust collection box. The wear debris collection device according to claim 1 .

3. a suction nozzle is provided near at least one of the brush column and the pin, and each of the suction nozzles is connected to the dust collection box via an air tube extending along the surface of the brush base, and the air flow passage is formed inside the air tube; When the dust collection fan is operated, a unidirectional airflow is formed in the airflow passage, the airflow flowing from the suction nozzle through the air tube to the dust collection box. The wear debris collection device according to claim 1 .

4. The suction nozzles are arranged along the air tube, and the opening size of the suction nozzles increases as they are spaced apart from the air inlet of the dust collection fan. The wear debris collection device according to claim 3 .

5. The suction nozzle is provided at a position on the brush base plate near the brush posts and the pins where wear powder accumulates. The wear debris collecting device according to any one of claims 2 to 4.

6. the suction nozzle is a suction nozzle with an oblique opening, and is disposed obliquely above the brush pillar, and the suction nozzle with the oblique opening protrudes from the surface of the brush substrate so that the opening direction faces the corresponding brush pillar; The suction nozzle is provided as a suction nozzle with a flat opening near each pin or between two adjacent pins, and the suction nozzle with the flat opening does not protrude from the surface of the brush substrate. The wear debris collection device according to claim 5.

7. The dust collection box includes a box body and a box lid to which the dust collection fan is attached, The air inlet of the dust collection fan is connected to the inside of the dust collection box, and the box body is connected to the air tube.

4. The wear debris collecting device according to claim 2 or 3.

8. The box body and the air tube are made of an insulating material. The wear debris collection device according to claim 7.

9. a blowing nozzle connected to an air outlet of the dust collecting fan by an air tube extending along a surface of the brush base plate is provided near at least one of the brush column and the pin; By operating the dust collection fan, a circulating airflow is formed in the airflow passage, which sequentially passes through the air tube, the blowing nozzle, the surface of the brush substrate, and the dust collection box. The wear debris collection device according to claim 1 .

10. The blowing nozzle is provided at a position where wear powder accumulates near at least one of the brush pillar and the pin on the brush base plate. The wear debris collection device according to claim 9.

11. An insulating plate is formed on the brush substrate on the side where the brush pillar protrudes, and the insulating plate separates at least one of the brush pillar and the pin in accordance with the rules for insulating between the W-phase, V-phase, and U-phase, and three airflow passages located in the W-phase, V-phase, and U-phase are formed between the insulating plate and the brush substrate and between the insulating plates themselves, Both ends of the airflow passage are provided on both the front and rear sides of the brush base plate relative to the direction of movement of the rotating part of the CT device, and when the dust collection fan operates, a unidirectional airflow flowing from the surface of the brush base plate toward the dust collection box is formed in the airflow passage. The wear debris collection device according to claim 1 .

12. The dust collecting device further includes a filter provided at a communication point between the dust collecting fan and the dust collecting box. The wear debris collection device according to claim 1 .

13. A CT apparatus comprising the wear debris collecting device according to claim 1.

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