JP6253505B2 - Armature for linear motor - Google Patents

Description

  The present invention relates to an armature used as a stator or a mover of a linear motor.

  An armature used for a linear motor includes a core, a plurality of teeth provided on the core in the motor driving direction, and a coil wound around the teeth. If the coil generates heat when energized, the core temperature may adversely affect the performance of the armature. As a countermeasure, a cooling pipe is usually disposed in a slot portion formed between the tooth portions (see Patent Document 1). The core is cooled by the refrigerant supplied into the cooling pipe, and the temperature rise is suppressed.

JP 2008-35698 A

  In order to effectively suppress the temperature rise of the core, it is preferable that the cooling performance of the core by the cooling pipe is better. The present inventor has come to recognize that there is room for improvement regarding the structure of the armature in realizing such a demand.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which can improve the cooling performance of the core by a cooling pipe.

  In order to solve the above-described problems, an armature for a linear motor according to an aspect of the present invention is an armature for a linear motor, and cools the core, a plurality of grooves formed side by side with the core, and the core. And a cooling pipe through which the refrigerant flows. The plurality of groove portions include a first groove portion that is in the middle of the direction in which the groove portions are arranged, a second groove portion that is located at one position away from the first groove portion, and the groove portion of the plurality of groove portions. 3rd groove part in the middle of the direction where a line is arranged, and the 4th groove part in the position away from the other of the direction lined up from the 3rd groove part. The cooling pipe is formed so as to meander through a plurality of groove portions including these from the first groove portion toward the second groove portion, the first groove portion being an upstream side, and the second groove portion being a downstream side refrigerant. The first conduit portion through which the gas flows and the third groove portion to the fourth groove portion are formed so as to meander through the plurality of groove portions including these, and the inside of the third groove portion is the upstream side, And a second conduit portion through which the refrigerant flows.

  Another aspect of the present invention is also a linear motor armature. This armature for a linear motor is an armature for a linear motor, and includes a core, a plurality of grooves formed side by side with the core, and a cooling pipe through which a coolant for cooling the core flows. . The plurality of groove portions are: a first groove portion in one of the plurality of groove portions in the direction in which the groove portions are arranged; a second groove portion in a position away from the other in the direction in which the groove portions are arranged; and the groove portion in the plurality of groove portions. 3rd groove part which exists in the other of the direction where a row | line | column is located, and the 4th groove part which exists in the position away from one side of the line direction from a 3rd groove part. The cooling pipe is formed so as to meander through a plurality of groove portions including these from the first groove portion toward the second groove portion, the first groove portion being an upstream side, and the second groove portion being a downstream side refrigerant. The first conduit portion through which the gas flows and the third groove portion to the fourth groove portion are formed so as to meander through the plurality of groove portions including these, and the inside of the third groove portion is the upstream side, And a second conduit portion through which the refrigerant flows. The portion passing through the groove portion of the first conduit portion and the portion passing through the groove portion of the second conduit portion are alternately arranged in the direction aligned in the plurality of groove portions.

  According to an aspect of the present invention, the cooling performance of the core by the cooling pipe can be improved.

It is side surface sectional drawing which shows the linear motor with which the armature which concerns on 1st Embodiment is used. It is a disassembled perspective view which shows the armature which concerns on 1st Embodiment. It is a block diagram which shows the piping system containing the cooling pipe which concerns on 1st Embodiment. It is a top view which shows the armature which concerns on 1st Embodiment. It is a top view which shows the armature which concerns on related technology. It is a block diagram which shows the piping system containing the cooling pipe which concerns on 2nd Embodiment. It is a top view which shows the armature which concerns on 2nd Embodiment. It is a top view which shows the armature which concerns on 3rd Embodiment. 9 is a cross-sectional view taken along line AA in FIG. It is a top view which shows the armature which concerns on 4th Embodiment. It is the BB sectional view taken on the line of FIG. It is sectional drawing which shows the other form of the 1st pipe line part arrange | positioned in a 1st groove part, and a 2nd pipe line part. It is side surface sectional drawing which shows the linear motor with which the armature which concerns on 5th Embodiment is used. It is a top view which shows the armature which concerns on 5th Embodiment. It is a top view which shows the armature which concerns on 6th Embodiment.

(First embodiment)
FIG. 1 shows a linear motor 10 in which an armature 40 according to the first embodiment is used. The linear motor 10 includes a field element 30 and an armature 40. The field element 30 is a stator, and the armature 40 is a mover. Hereinafter, the motor driving direction of the linear motor 10 will be referred to as direction X, the height direction of an armature core 41 to be described later will be referred to as direction Y, and the depth direction of the armature core 41 will be described as direction Z. The directions Y and Z are orthogonal to each other in a plane perpendicular to the direction axis of the direction X, the direction Y coincides with the protruding direction of the teeth portion 43 (described later), and the direction Z is a metal plate 47 (described later). To match the stacking direction.

  The field element 30 includes a field element core 31 and a plurality of magnets 33. The field element core 31 is a rectangular parallelepiped member extending in the motor driving direction X. Each magnet 33 is a permanent magnet, but may be an electromagnet. Each magnet 33 is provided such that different magnetic poles (N pole, S pole) are alternately positioned in the motor driving direction X.

  The armature 40 is disposed at a distance from the field element 30. The armature 40 includes an armature core 41, a cooling pipe 60, and a resin material 53.

  FIG. 2 shows an exploded perspective view of the armature 40. This figure shows a state where the cooling pipe 60 and the resin material 53 are omitted from the armature core 41. The armature core 41 is formed extending in a rectangular parallelepiped shape in the motor driving direction X. Hereinafter, one end part side (lower right side in FIG. 2) of the armature core 41 in the motor driving direction X is referred to as a front end part 41c side, and the other end part side (upper left side in FIG. 2) is referred to as a rear end part 41d side.

  The armature core 41 is configured by laminating a plurality of metal plates 47. Each metal plate 47 is integrated by caulking, welding, adhesive, or the like. The metal plate 47 is an electromagnetic steel plate, but may be another metal plate. The armature core 41 may be composed of a sintered body such as sintered ferrite.

  Returning to FIG. 1, the armature core 41 includes a back yoke portion 42, a plurality of teeth portions 43, a plurality of coil groove portions 45, and a pair of side yoke portions 46. The back yoke portion 42 is provided on the outer side portion 41 b opposite to the inner side portion 41 a of the armature core 41 facing the field element 30, and is formed to extend in the motor driving direction X. Each teeth portion 43 protrudes from the back yoke portion 42 toward the field element 30 and is provided at an interval in the motor driving direction X. Each coil groove portion 45 is formed on both sides of the motor drive direction X with respect to the tooth portion 43. The side yoke portions 46 protrude toward the field element 30 from both end portions of the back yoke portion 42 in the motor driving direction X. The teeth portion 43, the coil groove portion 45, and the side yoke portion 46 are provided in the inner portion 41 a of the armature core 41 that faces the field element 30.

  The armature core 41 has a concavo-convex shape in which the teeth 43 and the coil grooves 45 are alternately provided in the motor driving direction X, that is, a comb-teeth shape. A coil 49 is wound around each tooth portion 43, and the coil 49 is disposed in the coil groove 45.

  In the armature core 41, a plurality of duct groove portions 51 (hereinafter simply referred to as groove portions 51) are formed side by side at equal intervals in the motor driving direction X on the outer side portion 41b. Each groove 51 is formed at a position corresponding to the coil groove 45, more specifically, at a position shifted in the core height direction Y with respect to the coil groove 45. Each groove 51 penetrates in the core depth direction Z and is formed to open in one side in the core height direction Y. A core cooling part 73 (described later) of the cooling pipe 60 is disposed in each groove part 51. The core cooling unit 73 is disposed so as to contact the groove bottom surface, which is the inner surface of the groove 51.

  The resin material 53 is filled between the core cooling part 73 and the groove part 51 of the cooling pipe 60. The resin material 53 is a mold resin or the like, and a material having a larger heat transfer coefficient than air is used. By filling the resin material 53, the cooling pipe 60 is integrated with the armature core 41. Further, the filling of the resin material 53 facilitates heat transfer between the cooling pipe 60 and the armature core 41, and the cooling performance of the armature core 41 by the cooling pipe 60 is improved.

  In the above linear motor 10, thrust is generated in the armature 40 due to the interaction between the magnetic field generated by energization of the coil 49 and the magnetic field of the magnet 33, and the armature 40 moves in the motor driving direction X.

  Next, details of the cooling pipe 60 will be described. FIG. 3 is a configuration diagram showing the piping system 100 including the cooling pipe 60. In this figure, the direction in which a coolant such as water flows is indicated by an arrow. The same applies to the subsequent drawings.

  The piping system 100 includes a pump 101 for flowing a refrigerant for cooling the armature core 41 to the cooling pipe 60. The cooling pipe 60 is connected to the pump 101 on the upstream side and the downstream side. In this piping system 100, the refrigerant is transferred by driving the pump 101, and flows so as to circulate through the cooling pipe 60.

  FIG. 4 is a plan view showing a state where the cooling pipe 60 is attached to the armature core 41. In this figure, the resin material 53 is omitted. The cooling pipe 60 is made of a metal material such as copper, and the refrigerant flows inside. The cooling pipe 60 includes a first pipe part 61, a second pipe part 63, an inflow part 65, a branch part 67, an outflow part 69, and a joining part 71.

  The first conduit portion 61 and the second conduit portion 63 include a plurality of core cooling portions 73 and a plurality of continuous portions 75. The core cooling units 73 are provided side by side at equal intervals in the motor driving direction X, which is the direction in which the groove portions 51 are arranged. Each core cooling unit 73 is disposed in a separate groove 51 of the armature core 41. The core cooling part 73 is formed so as to extend linearly along the direction in which the groove part 51 extends (core depth direction Z). As with the groove portion 51, each core cooling portion 73 also has a position corresponding to the coil groove portion 45, more specifically, a position shifted in the core height direction Y with respect to the coil groove portion 45 as shown in FIG. 1. Placed in.

  As shown in FIG. 4, the connecting portion 75 connects the ends of the two core cooling portions 73 adjacent to each other in the motor driving direction X. The connecting portion 75 connects the end portions of the two core cooling portions 73 that are separated from each other in the direction in which the groove portions 51 are arranged. Each core cooling unit 73 has a continuous internal flow path through the continuous portion 75. The connecting portion 75 is configured to include a bent portion that is folded from an end portion of one core cooling portion 73 toward an end portion of another core cooling portion 73. The continuous portion 75 is disposed outside the armature core 41 in the core depth direction Z. In addition, although the cross section of the core cooling part 73 and the connection part 75 is formed in a cylindrical shape, if it is cylindrical, you may form in a rectangular tube shape.

  Here, an even number of grooves 51 are formed. Among the plurality of groove portions 51, the plurality of groove portions 51 include a first groove portion 51A that is in the middle of the motor driving direction X that is the direction in which the groove portions 51 are arranged, and a front end that is one of the first groove portion 51A and the motor driving direction X. 2nd groove part 51B in the position away from the part 41c side is included. 51 A of 1st groove parts are the groove parts 51 in the position nearest from the center position 41e of the armature core 41 in the motor drive direction X to the front-end part 41c side. The second groove 51 </ b> B is the groove 51 located closest to the front end 41 c of the armature core 41 in the motor driving direction X.

  Further, among the plurality of groove portions 51, the plurality of groove portions 51 include a third groove portion 51 </ b> C that is in the middle of the motor driving direction X and a rear end portion 41 d that is the other side of the motor driving direction X from the third groove portion 51 </ b> C. 4th groove part 51D in a distant position is included. The third groove 51C is a groove 51 that is provided separately from the first groove 51A and is located closest to the rear end 41d side from the central position 41e of the armature core 41. The third groove 51C is also a groove 51 located at a position adjacent to the rear end 41d side of the armature core 41 with respect to the first groove 51A. The fourth groove portion 51 </ b> D is the groove portion 51 located closest to the rear end portion 41 d of the armature core 41 in the motor driving direction X.

  The first duct portion 61 is formed so as to meander through the plurality of groove portions 51 including these from the first groove portion 51A toward the second groove portion 51B. More specifically, the first duct portion 61 is formed so as to meander through all the insides of the first groove portion 51A, the second groove portion 51B, and the five groove portions 51 between them. . In the first duct portion 61, the refrigerant flows with the inside of the first groove portion 51A as the upstream side and the inside of the second groove portion 51B as the downstream side.

  The second duct part 63 is formed so as to meander through the plurality of groove parts 51 including these from the third groove part 51C toward the fourth groove part 51D. More specifically, the second duct portion 63 is formed so as to meander through all the insides of the third groove portion 51C, the fourth groove portion 51D, and the five groove portions 51 between them. . In the second pipe portion 63, the refrigerant flows with the third groove 51C as the upstream side and the fourth groove 51D as the downstream side.

  The first pipe section 61 has its flow path cut from the upstream portion 61a upstream from the portion passing through the first groove 51A to the downstream portion 61b downstream from the portion passing through the second groove 51B. It is formed so that the area is constant. The second pipe portion 63 has its flow path cut from the upstream portion 63a upstream from the portion passing through the third groove 51C to the downstream portion 63b downstream from the portion passing through the fourth groove 51D. It is formed so that the area is constant. The 1st pipe line part 61 and the 2nd pipe line part 63 are each formed so that it may become the same flow-path cross-sectional area.

  The refrigerant transferred from the upstream pump 101 flows into the inflow portion 65. The branch portion 67 connects the upstream portion 61 a of the first conduit portion 61, the upstream portion 63 a of the second conduit portion 63, and the inflow portion 65. The branching portion 67 is formed in a T shape so that the upstream side portions 61 a and 63 a of the pipe portions 61 and 63 extend in a direction intersecting the axial direction of the inflow portion 65. The branching portion 67 introduces the refrigerant flowing in from the upstream inflow portion 65 into the first conduit portion 61 and the second conduit portion 63.

  From the outflow part 69, the refrigerant passing through the first pipe part 61 and the second pipe part 63 flows out to the pump 101 on the downstream side. The merge portion 71 connects the downstream portion 61 b of the first pipeline portion 61, the downstream portion 63 b of the second pipeline portion 63, and the outflow portion 69. The merge portion 71 is formed in a T shape so that the outflow portion 69 extends in a direction intersecting with the axial direction of the downstream side portions 61b and 63b of the respective pipeline portions 61 and 63. The merge portion 71 merges the refrigerants derived from the first pipeline portion 61 and the second pipeline portion 63 and causes the refrigerant to flow out to the outflow portion 69 on the downstream side.

  The flow path length from the branch part 67 of the first pipeline part 61 to the merge part 71 is Lp1 [mm], and the flow path length from the branch part 67 of the second pipeline part 63 to the merge part 71 is Lp2 [mm]. ]. At this time, the 1st pipe line part 61 and the 2nd pipe line part 63 are comprised so that each flow path length Lp1 and Lp2 may become the same.

  Each of the pipe sections 61 and 63 of the cooling pipe 60 is manufactured by bending a single pipe body. Further, the branching portion 67 is formed by welding or the like of the pipe portions 61 and 63 and the inflow portion 65. The junction 71 is formed by welding the pipe sections 61 and 63 and the outflow portion 69. In this way, the pipe sections 61 and 63 are integrally formed. In addition, the branch part 67 and the junction part 71 may be formed by connecting, for example, a pipe joint having a branch flow path and the pipe line parts 61 and 63.

  In the cooling pipe 60 described above, the refrigerant flows from the pump 101 into the inflow part 65, and the refrigerant is branched by the branching part 67 and introduced into the pipe parts 61 and 63. The refrigerant flowing through the pipe sections 61 and 63 joins at the joining section 71 and flows out from the outflow section 69 to the pump 101. At this time, a part of the armature core 41 around the core cooling part 73 is cooled by the refrigerant flowing through the core cooling part 73 of each of the pipe line parts 61 and 63.

  The effects of the armature 40 according to the above embodiment will be described. When the armature core 41 is cooled by the cooling pipe 60, both end portions 41c and 41d in the motor driving direction X have side end surfaces 41f (see FIG. 4) in contact with a heat medium such as air. Heat is easily removed by the heat medium. On the other hand, in the intermediate portion in the motor driving direction X, since there are few surfaces in contact with the heat medium as compared with the both end portions 41c and 41d, it is difficult for heat to be extracted from the armature core 41 to the heat medium. Therefore, the armature core 41 is less likely to be removed as it approaches the center position 41e from both end portions 41c and 41d in the motor driving direction X.

  FIG. 5 shows the structure of the armature 140 as a related technique. Since the structure of the armature core 41 is the same as that shown in FIG. 1, the same reference numerals are given and description thereof is omitted. The cooling pipe 160 is provided so as to meander through the plurality of groove portions 51 including the rear end side groove portion 51E at the rear end portion 41d of the armature core 41 and the front end side groove portion 51F at the front end portion 41c. In the cooling pipe 160, the refrigerant flows with the rear end side groove 51E as the upstream side and the front end side groove 51F as the downstream side.

  In the cooling pipe 160, the temperature of the refrigerant is low in the upstream portion, and the temperature of the refrigerant becomes higher than the heat absorption from the armature core 41 toward the downstream portion. Therefore, the temperature gradient of the refrigerant is generated such that the rear end portion 41d side of the armature core 41 has a low temperature and the front end portion 41c side has a high temperature.

  Due to the difference in the amount of heat removed from the armature core 41 in the motor driving direction X as described above and the temperature gradient of the refrigerant in the cooling pipe 60, in the related art structure, the armature core 41 in the motor driving direction X The armature core 41 tends to be hot in a range S1 from the vicinity of the central position 41e to a position shifted to the downstream side of the cooling pipe 60. Further, in the related art structure, the armature core 41 tends to become lower in temperature as it moves away from the high temperature portion in the motor driving direction X. Therefore, a temperature distribution is generated in the armature core 41 in the motor driving direction X, and the armature core 41 may be deformed so as to warp around the axis in the core depth direction Z due to thermal expansion.

  In this regard, according to the cooling pipe 60 according to the present embodiment, the refrigerant flows from the first groove portion 51A and the third groove portion 51C in the middle of the motor drive direction X, which is the direction in which the groove portions 51 are arranged, and the motor drive direction X The refrigerant flows so as to pass through the respective groove portions 51 toward both sides. Therefore, it is possible to flow a low-temperature refrigerant from a position close to the central position 41e in the motor driving direction X, rather than flowing the refrigerant from the rear end side groove 51E as in the related art, and the center of the armature core 41 that is difficult to remove heat. It becomes easy to cool the position 41e.

  Further, in the cooling pipe 60 according to the present embodiment, the refrigerant becomes a low temperature in the first groove part 51A and the third groove part 51C that are the upstream side parts of the respective pipe line parts 61 and 63, and as it moves away from there in the motor driving direction X. A temperature gradient is generated such that the refrigerant passing through the groove 51 has a high temperature. Therefore, both ends 41c of the armature core 41 that are easy to remove heat because the refrigerant becomes hot at both ends in the motor driving direction X, rather than flowing the refrigerant from the rear end groove 51E to the front end groove 51F as in the related art. It is difficult to cool 41d.

  As a result, the cooling performance of the armature core 41 by the cooling pipe 60 can be improved so as to alleviate the temperature distribution bias of the armature core 41 in the motor driving direction X, and the armature core 41 of the armature core 41 due to the temperature distribution bias can be improved. Deformation can be suppressed.

  In addition, since the cooling pipe 60 according to the present embodiment is provided with the branch part 67, the number of the inflow parts 65 for allowing the refrigerant to flow into the respective pipe line parts 61 and 63 is suppressed. Therefore, the piping system 100 for flowing the refrigerant through the cooling pipe 60 can be simplified, and the handling becomes easy.

  Moreover, since the junction part 71 is provided in the cooling pipe 60 which concerns on this embodiment, the number of the outflow parts 69 for making a refrigerant | coolant flow out from each pipe line part 61 and 63 is restrained. Therefore, the piping system 100 for flowing the refrigerant through the cooling pipe 60 can be simplified, and the handling becomes easy.

  In addition, the armature 40 according to the present embodiment is configured such that the channel lengths Lp1 and Lp2 of the pipe sections 61 and 63 are the same. Therefore, pressure is applied to the refrigerant flowing through the pipe portions 61 and 63 in the vicinity of the connection portion between the pipe portions 61 and 63 and the branch portion 67 and in the vicinity of the connection portion between the pipe portions 61 and 63 and the merging portion 71. Differences are less likely to occur, and refrigerant backflow or the like is less likely to occur in these pipe sections 61 and 63.

[Second Embodiment]
FIG. 6 is a configuration diagram showing the piping system 100 including the cooling pipe 60 according to the second embodiment. In the cooling pipe 60 according to the present embodiment, the first pipe part 61 and the second pipe part 63 are not integrated but formed separately. In the following embodiments, the same elements as those described in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The piping system 100 includes a first piping system 100A and a second piping system 100B. The first piping system 100 </ b> A includes a first pump 101 </ b> A for flowing a refrigerant through the first pipe part 61 of the cooling pipe 60. In the first piping system 100 </ b> A, the refrigerant is transferred by driving the first pump 101 </ b> A, and flows so as to circulate through the first pipeline 61 of the cooling pipe 60. The second piping system 100 </ b> B includes a second pump 101 </ b> B for flowing the refrigerant through the second pipe portion 63 of the cooling pipe 60. In the second piping system 100B, the refrigerant is transferred by driving the second pump 101B, and flows so as to circulate through the second pipe section 63 of the cooling pipe 60.

  FIG. 7 is a plan view showing a state where the cooling pipe 60 is attached to the armature core 41. In this figure, the resin material 53 is omitted. The cooling pipe 60 includes a first inflow part 65A, a first outflow part 69A, a second inflow part 65B, and a second outflow part 69B in addition to the first conduit part 61 and the second conduit part 63. Including.

  The first inflow portion 65 </ b> A is connected to the upstream portion 61 a of the first conduit portion 61. The first outflow portion 69 </ b> A is connected to the downstream portion 61 b of the first conduit portion 61. The refrigerant transferred from the upstream first pump 101 </ b> A flows into the first inflow portion 65 </ b> A, and the refrigerant is introduced into the upstream portion 61 a of the first conduit 61. From the first outflow portion 69A, the refrigerant passing through the first conduit portion 61 flows out to the first pump 101A on the downstream side.

  The second inflow portion 65 </ b> B is connected to the upstream portion 63 a of the second pipe portion 63. The second outflow portion 69B is connected to the downstream portion 63b of the second pipe portion 63. The refrigerant transferred from the second pump 101B on the upstream side flows into the second inflow portion 65B, and the refrigerant is introduced into the upstream portion 63a of the second pipe portion 63. From the second outflow part 69B, the refrigerant passing through the second pipe part 63 flows out to the second pump 101B on the downstream side. Thus, the 1st pipe line part 61 and the 2nd pipe line part 63 are comprised not separately but separately.

  Similarly to the first embodiment, the armature 40 according to the above embodiment can alleviate the uneven temperature distribution in the motor driving direction X of the armature core 41, and the armature core 41 can be deformed by the uneven temperature distribution. Can be suppressed.

[Third Embodiment]
FIG. 8 is a plan view showing a state where the cooling pipe 60 according to the third embodiment is attached to the armature core 41. In this figure, the resin material 53 is omitted. The piping system 100 including the cooling pipe 60 has the same configuration as that of the first embodiment.

  An odd number of grooves 51 are formed. The plurality of groove portions 51 include a fifth groove portion 51K in addition to the first groove portion 51A to the fourth groove portion 51D. The fifth groove 51K is provided between the first groove 51A and the third groove 51C. The fifth groove 51K is provided at the central position 41e of the armature core 41 in the motor driving direction X. The first groove 51A is located closest to the front end 41c side of the armature core 41 from the fifth groove 51K, and the third groove 51C is located closest to the rear end 41d of the armature core 41 from the fifth groove 51K. Close position.

  The inflow portion 65 of the cooling pipe 60 is provided on the upstream side of the branch portion 67 and is disposed so as to pass through the fifth groove portion 51K. 9 is a cross-sectional view taken along line AA in FIG. The 1st pipe line part 61 and the 2nd pipe line part 63 are formed so that those flow path cross-sectional areas Sa [mm2] may become the same. On the other hand, the inflow portion 65 is formed to have a flow passage cross-sectional area Sb [mm2] larger than the flow passage cross-sectional area Sa in each of the pipe line portions 61 and 63. In this figure, the locations where the channel cross-sectional area Sa is surrounded by the pipeline sections 61 and 63 are indicated by the alternate long and short dash line Ta, and the locations where the flow path cross-sectional area Sb is indicated by the inflow portion 65 are indicated by the dashed-dotted line Tb. More specifically, the inflow portion 65 has the same channel cross-sectional area Sb as 2 × Sa, which is the sum of the channel cross-sectional area Sa of the first pipe part 61 and the channel cross-sectional area Sa of the second pipe part 63. It is formed to become.

  In the first pipeline section 61, as shown in FIG. 8, from the upstream section 61a located upstream from the section passing through the first groove 51A, the downstream section located downstream from the section passing through the second groove 51B. It is formed so that the channel cross-sectional area becomes Sa over 61b. In the second duct portion 63, the flow path is cut from the upstream portion 63a upstream of the portion passing through the third groove 51C to the downstream portion 63b downstream of the portion passing through the fourth groove 51D. It is formed so that the area becomes Sb.

  Also by the armature 40 according to the above embodiment, the same effect as that of the first embodiment can be obtained. In addition, when the flow passage cross-sectional area S2 at the inflow portion 65 is the same as the flow passage cross-sectional area Sa at each of the pipe portions 61 and 63, the pressure loss at the upstream inflow portion 65 increases, and the downstream side It becomes difficult for the refrigerant to flow through the pipe sections 61 and 63. In this respect, in this embodiment, the flow passage cross-sectional area S2 at the inflow portion 65 is larger than the flow passage cross-sectional area Sa at each of the pipe portions 61 and 63, so that it is easy to suppress the pressure loss at the upstream inflow portion 65. Thus, the cooling efficiency is improved by facilitating the flow of the refrigerant through the downstream pipe sections 61 and 63. In order to easily suppress the pressure loss at the inflow portion 65, the upper limit value of the flow path cross-sectional area Sb is not particularly limited, but the fifth groove portion 51 </ b> K increases as this increases, affecting the strength of the armature core 41. To do. From this point of view, the channel cross-sectional area Sb of the inflow portion 65 may be, for example, not more than twice the total of the channel cross-sectional areas Sa of the pipe line portions 61 and 63.

[Fourth Embodiment]
FIG. 10 is a plan view showing a state in which the cooling pipe 60 according to the fourth embodiment is attached to the armature core 41. In this figure, the resin material 53 is omitted. The piping system 100 including the cooling pipe 60 has the same configuration as that of the second embodiment.

  An odd number of grooves 51 are formed. The third groove 51C is configured by the first groove 51A. Portions on the upstream side of the first pipeline portion 61 and the second pipeline portion 63 are arranged side by side in the first groove 51A. 11 is a cross-sectional view taken along line BB in FIG. This figure is also a cross-sectional view of the pipe sections 61 and 63 in the first groove 51A. A part of each pipe line part 61 and 63 is arranged side by side in the depth direction Y (core height direction Y) in the 1st groove part 51A.

  Also by the armature 40 according to the above embodiment, the same effect as that of the first embodiment can be obtained.

  In addition, as shown in FIG. 12, some pipe line parts 61 and 63 may be arranged in the 1st groove part 51 not in the depth direction Y but in the motor drive direction X. As shown in FIG.

[Fifth Embodiment]
FIG. 13 shows the linear motor 10 in which the armature 40 according to the fifth embodiment is used, and FIG. 14 is a plan view showing a state where the cooling pipe 60 according to the fifth embodiment is attached to the armature core 41. The piping system 100 including the cooling pipe 60 has the same configuration as that of the first embodiment.

  In addition to the inflow portion 65 and the outflow portion 69, the cooling pipe 60 has a first conduit portion 81, a second conduit portion 83, and a folded portion 85. In FIG. 14, the direction in which the refrigerant flows in the first pipe portion 81 is indicated by a solid arrow, the direction in which the refrigerant flows in the second pipe portion 83 is indicated by a dashed arrow, and the direction in which the refrigerant flows in other parts is outlined. Shown with an arrow.

  The first conduit portion 81 and the second conduit portion 83 include a plurality of core cooling portions 73 and a plurality of continuous portions 75. These details are the same as in the first embodiment.

  The plurality of groove portions 51 of the armature core 41 include a first groove portion 51G on the rear end portion 41d side of the motor driving direction X, which is one of the plurality of groove portions 51 in the direction in which the groove portions 51 are arranged. Further, the plurality of groove portions 51 include a second groove portion 51H located at a position away from the first groove portion 51G toward the front end portion 41c in the motor driving direction X, which is the other of the directions in which the groove portions 51 are arranged. The first groove 51G is the groove 51 located closest to the rear end 41d of the motor driving direction X. The second groove 51H is the groove 51 located at the second position from the front end 41c to the rear end 41d in the motor driving direction X.

  The plurality of groove portions 51 include a third groove portion 51I on the front end portion 41c side in the motor driving direction X, and a rear end portion 41d side of the motor driving direction X from the third groove portion 51I. A fourth groove 51J at a distant position is included. The third groove 51I is the groove 51 located closest to the front end 41c in the motor driving direction X. The third groove portion 51I is also a groove portion 51 located at a position adjacent to the rear end portion 41d side of the armature core 41 with respect to the second groove portion 51H. The fourth groove 51J is the groove 51 located at the second position from the rear end 41d to the front end 41c in the motor driving direction X. The fourth groove 51J is also a groove 51 located at a position adjacent to the front end 41c side of the armature core 41 with respect to the first groove 51G.

  The first conduit portion 81 is formed so as to meander through the plurality of groove portions 51 including these from the first groove portion 51G toward the second groove portion 51H. More specifically, the first pipe line portion 81 is formed so as to meander through the plurality of groove portions 51 at every other position from the first groove portion 51G toward the second groove portion 51H. That is, the second groove 51H is also a groove 51 that is located at every other position with respect to the first groove 51G among the plurality of grooves 51. In the first pipe section 81, the refrigerant flows with the first groove 51G as the upstream side and the second groove 51H as the downstream side.

  The second duct portion 83 is formed so as to meander through the plurality of groove portions 51 including these from the third groove portion 51I toward the fourth groove portion 51J. More specifically, the second pipe line part 83 is formed so as to meander through the plurality of groove parts 51 at every other position from the third groove part 51I toward the fourth groove part 51J. That is, the fourth groove portion 51J is also a groove portion 51 that is located every other position with respect to the third groove portion 51I among the plurality of groove portions 51. In the second pipe portion 83, the refrigerant flows with the inside of the third groove portion 51I as the upstream side and the inside of the fourth groove portion 51J as the downstream side.

  The symbol of the core cooling portion 73 that is a portion passing through the groove portion 51 of the first conduit portion 81 is “73A”, and the symbol of the core cooling portion 73 that is a portion passing through the groove portion 51 of the second conduit portion 83 is “73B”. And The pipe sections 81 and 83 are configured such that the core cooling sections 73A and 73B are alternately arranged in the motor driving direction X in the plurality of grooves 51. That is, in the plurality of groove portions 51, the core cooling portion 73A of the first conduit portion 81 and the core cooling portion of the second conduit portion 83 are directed from the rear end portion 41d side to the front end portion 41c side in the motor driving direction X. The parts 73B are arranged in the order of “73A, 73B, 73A, 73B.

  The folded portion 85 is provided between the downstream end portion 81a of the first conduit portion 81 and the upstream end portion 83a of the second conduit portion 83, and connects them. The first channel portion 81 and the second channel portion 83 have internal flow paths that pass through the folded portion 85. Thus, the 1st pipe line part 81 and the 2nd pipe line part 83 are formed integrally. The folded portion 85 includes a bent portion that is folded from the downstream end portion 81 a of the first conduit portion 81 toward the upstream end portion 83 a of the second conduit portion 83. The folded portion 85 is disposed outside the core depth direction Z of the armature core 41.

  As shown in FIG. 13, the first pipe part 81 and the second pipe part 83 are configured to be arranged at positions shifted in the depth direction of the plurality of groove parts 51. This depth direction coincides with the core height direction Y of the armature core 41. In the present example, the second pipe part 83 is located on the bottom side in the depth direction with respect to the first pipe part 81.

  Here, with respect to the core cooling part 73A of the first pipe part 81, the first virtual tangent passing through the bottom side end face 87 on the bottom side of the groove part 51 is referred to as Lia, and the core cooling part 73B of the second pipe part 63 The second virtual tangent line passing through the entry side end face 89 on the entry side of the groove 51 is referred to as Lib. The virtual tangents Lia and Lib extend parallel to each other when viewed from the direction in which the groove 51 extends. The direction in which the groove 51 extends coincides with the core depth direction Z. At this time, the 1st pipe line part 81 and the 2nd pipe line part 63 are comprised so that the 2nd virtual tangent Lib may be located in the bottom side of a depth direction rather than the 1st virtual tangent Lia. Thereby, the interference by the contact in the depth direction of the 1st pipe line part 81 and the 2nd pipe line part 83 is suppressed.

  The groove 51 in which the core cooling part 73A of the first pipe part 81 is arranged is referred to as a first pipe groove 51, and the groove 51 in which the core cooling part 73B of the second pipe part 83 is arranged is the second pipe. This is referred to as a groove 51 for use. Each duct groove portion 51 is formed so as to have different depth dimensions. Specifically, the first duct groove portion 51 is formed to have a depth dimension Lda [mm], and the second duct groove portion 51 is formed to have a depth dimension Ldb. The depth dimension Lda is determined so that the bottom-side end surface 87 of the core cooling portion 73 </ b> A of the first conduit portion 81 contacts the groove bottom surface of the first conduit groove portion 51. The depth dimension Ldb is determined so that the bottom side end face 87 of the core cooling part 73B of the second pipe line part 83 is in contact with the groove bottom surface of the second pipe line groove part 51.

  The effects of the armature 40 according to the above embodiment will be described. As described above, in the related art structure of FIG. 5, a refrigerant temperature gradient is generated such that the rear end portion 41 d side of the armature core 41 is low temperature and the front end portion 41 c side is high temperature. Unevenness occurs in the driving direction X.

  On the other hand, in the first pipe line portion 81 according to the present embodiment, as shown in FIG. 14, the upstream portion 81b near the rear end portion 41d of the armature core 41 has a low temperature, and the downstream portion near the front end portion 41c. The temperature gradient of the refrigerant is such that 81c has a high temperature. Moreover, in the 2nd pipe line part 83, it becomes the temperature gradient of a refrigerant | coolant so that the upstream part 83b near the front-end part 41c of the armature core 41 becomes low temperature, and the downstream part 83c near the rear-end part 41d becomes high temperature. .

  In other words, the temperature gradient of the refrigerant in the motor driving direction X is reversed between the first pipe portion 81 and the second pipe portion 83, and the uneven cooling capacity in the motor driving direction X in the entire cooling pipe 60 is suppressed. Therefore, the cooling performance of the armature core 41 by the cooling pipe 60 can be improved so as to alleviate the temperature distribution bias of the armature core 41 in the motor driving direction X, and the armature core 41 is deformed by the temperature distribution bias. Can be suppressed.

  In particular, since the core cooling parts 73 of the respective pipe line parts 81 and 83 are alternately arranged in the motor driving direction X, there is no place between the core cooling parts 73 constituting the same pipe line parts 81 and 83. If such a part exists, the part may be excessively cooled locally, or the cooling may be insufficient, and the part may be deformed to warp due to a temperature difference from other parts. In this respect, in the present embodiment, occurrence of such local excessive cooling and insufficient cooling can be suppressed.

  In addition, since the core cooling portions 73 of the pipe portions 81 and 83 are alternately arranged in the motor driving direction X, the bending of the connecting portion 75 that connects the core cooling portions 73 to each other is made rather than the structure of the related art. The amount of processing can be reduced. Therefore, the amount of plastic deformation of the 1st pipe line part 61 and the 2nd pipe line part 83 of the cooling pipe 60 is suppressed, and it becomes easy to ensure these intensity | strengths and proof stresses.

  In addition, since the cooling pipe 60 according to the present embodiment is provided with the folded part 85, the number of the inflow parts 65 and the outflow parts 69 for allowing the refrigerant to flow into and out of the pipe lines 61 and 63 is reduced. Therefore, the piping system 100 for flowing the refrigerant through the cooling pipe 60 can be simplified, and the handling becomes easy.

[Sixth Embodiment]
FIG. 15 is a plan view showing a state where the cooling pipe 60 according to the sixth embodiment is attached to the armature core 41. The piping system 100 including the cooling pipe 60 has the same configuration as that of the second embodiment.

  The cooling pipe 60 does not include the folded-back portion 85, and in addition to the first conduit portion 81 and the second conduit portion 83, the first inflow portion 65A, the first outflow portion 69A, and the second inflow portion. 65B and the 2nd outflow part 69B are included.

  The first inflow portion 65 </ b> A is connected to the upstream portion 81 d of the first conduit portion 81. The first outflow portion 69 </ b> A is connected to the downstream portion 81 a of the first conduit portion 81. The refrigerant transferred from the upstream first pump 101 </ b> A (not shown) flows into the first inflow portion 65 </ b> A, and the refrigerant is introduced into the upstream portion 81 d of the first pipe portion 81. From the first outflow portion 69A, the refrigerant passing through the first pipe portion 81 flows out to the first pump 101A (not shown) on the downstream side.

  The second inflow portion 65 </ b> B is connected to the upstream portion 83 a of the second conduit portion 83. The second outflow portion 69B is connected to the downstream portion 83d of the second pipe portion 83. The refrigerant transferred from the second pump 101B (not shown) on the upstream side flows into the second inflow portion 65B, and the refrigerant is introduced into the upstream portion 83a of the second pipe portion 83. From the second outflow portion 69B, the refrigerant passing through the second pipe portion 83 flows out to the second pump 101B (not shown) on the downstream side. Thus, the 1st pipe line part 81 and the 2nd pipe line part 83 are comprised not separately but separately.

  Similarly to the fifth embodiment, the armature 40 according to the above embodiment can alleviate the temperature distribution bias in the motor driving direction X of the armature core 41, and the armature core 41 is deformed by the temperature distribution bias. Can be suppressed.

  As mentioned above, although this invention was demonstrated based on embodiment, embodiment shows only the principle and application of this invention. In the embodiment, many modifications and arrangements can be made without departing from the spirit of the present invention defined in the claims.

  In the above-described embodiment, the example in which the armature 40 according to the present invention is applied to the mover has been described. However, the armature 40 may be applied to a stator.

  The duct groove 51 in which the cooling pipe 60 is disposed is formed in the outer portion 41 b of the armature core 41, but the coil groove 45 may be used as the duct groove 51. In this case, the cooling pipe 60 may be arranged on the bottom side of the coil groove part 45 as the duct groove part 51, and the coil 49 may be arranged on the opening side of the cooling pipe 60 in the coil groove part 45.

  If the first groove portion 51A and the third groove portion 51C of the armature core 41 according to the first to fourth embodiments are the groove portions 51 located close to the central position 41e of the armature core 41, the first groove portion 51A is the most at the central position 41e. The groove 51 may not be in the close position. Further, the second groove portion 51B and the fourth groove portion 51D do not have to be the groove portions 51 located closest to each other as long as the groove portions 51 are located near the both end portions 41c and 41d in the motor driving direction X.

  In the armature 40 according to the fifth and sixth embodiments, the example in which one cooling pipe 60 is used for one armature core 41 has been described. However, a plurality of cooling pipes 60 are used for one armature core 41. May be.

DESCRIPTION OF SYMBOLS 10 ... Linear motor, 40 ... Armature, 41 ... Armature core, 51 ... Groove part, 51A ... First groove part, 51B ... Second groove part, 51C ... Third Groove part, 51D ... fourth groove part, 51G ... first groove part, 51H ... second groove part, 51I ... third groove part, 51J ... fourth groove part, 51K ... fifth groove part, 60 ... cooling pipe, 61 ... first pipe section, 63 ... second pipe section, 67 ... branching section, 71 ... confluence section, 81 ... first pipe section , 83... Second pipe part, 85.

Claims (7)

An armature for a linear motor,
The core,
A plurality of grooves formed side by side with the core;
A cooling pipe through which a refrigerant for cooling the core flows, and
The plurality of grooves are
A first groove part in the middle of the direction in which the groove parts are arranged among the plurality of groove parts;
A second groove at a position away from the first groove in one of the alignment directions;
A third groove portion in the middle of the plurality of groove portions in the direction in which the groove portions are arranged;
A fourth groove located at a position away from the third groove in the other direction of the alignment,
The cooling pipe is
The first groove portion is formed so as to meander through a plurality of groove portions including these from the first groove portion to the second groove portion, the first groove portion being an upstream side, and the second groove portion being a downstream side refrigerant. A first conduit section through which
A refrigerant is formed so as to meander through a plurality of groove portions including these from the third groove portion to the fourth groove portion, with the inside of the third groove portion as an upstream side and the inside of the fourth groove portion as a downstream side. A second conduit section through which the
The first pipe portion and the second linear motor armature to the conduit portion of the by merging the refrigerant derived from each characterized Rukoto to have a, a merging unit for flowing downstream.   2. The linear motor according to claim 1, wherein the cooling pipe further includes a branching part for branching and introducing the refrigerant flowing from the upstream side into the first pipe part and the second pipe part. Armature. The cooling pipe is
Further comprising a branch part for branching and introducing the refrigerant flowing from the upstream side into the first pipe part and the second pipe part,
The said 1st pipe line part and the said 2nd pipe line part are comprised so that each flow path length from the said branch part to the said junction part may become the same, The Claim 1 or 2 characterized by the above-mentioned. The armature for linear motors of description. The plurality of groove portions further include a fifth groove portion between the first groove portion and the third groove portion,
The cooling pipe is
A branch part for branching and introducing the refrigerant flowing from the upstream side into the first pipe part and the second pipe part;
Provided on the upstream side of the branch part, and disposed so as to pass through the fifth groove part, the flow path cross-sectional area is larger than the flow path cross-sectional areas of the first and second pipe parts. The linear motor armature according to any one of claims 1 to 3 , further comprising an inflow portion formed on the linear motor. The third groove part is constituted by the first groove part,
Wherein the first conduit portion and the second portion of the conduit section upstream of the linear motor according to any one of claims 1 to 3, characterized in that it is arranged in the first groove Armature. An armature for a linear motor,
The core,
A plurality of grooves formed side by side with the core;
A cooling pipe through which a refrigerant for cooling the core flows, and
The plurality of grooves are
A first groove in one of the plurality of grooves in the direction in which the grooves are arranged;
A second groove part located at a position away from the first groove part in the other direction of the alignment;
A third groove in the other of the plurality of grooves in the direction in which the grooves are arranged;
A fourth groove located at a position away from the third groove in one of the alignment directions,
The cooling pipe is
The first groove portion is formed so as to meander through a plurality of groove portions including these from the first groove portion to the second groove portion, the first groove portion being an upstream side, and the second groove portion being a downstream side refrigerant. A first conduit section through which
A refrigerant is formed so as to meander through a plurality of groove portions including these from the third groove portion to the fourth groove portion, with the inside of the third groove portion as an upstream side and the inside of the fourth groove portion as a downstream side. A second conduit section through which
The portion passing through the groove portion of the first conduit portion and the portion passing through the groove portion of the second conduit portion are alternately arranged in the line-up direction in the plurality of groove portions ,
The linear motor armature according to claim 1, wherein the cooling pipe further includes a folded portion that connects a downstream portion of the first conduit portion and an upstream portion of the second conduit portion . The linear motor armature according to claim 6 , wherein the first pipeline portion and the second pipeline portion are arranged at positions shifted in a depth direction of the plurality of groove portions.

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