JP4560303B2 - Armature winding cooling structure - Google Patents

Description

  The present invention relates to an armature winding cooling structure for a motor or the like.

A motor generally includes an armature having a core provided with a winding. Since high heat is likely to be generated from such armature windings, various armature winding cooling structures have been proposed. Japanese Patent Application Laid-Open No. 2002-218730, etc. discloses an electric machine including a metal cooling pipe disposed adjacent to an armature winding and two metal manifolds respectively connected to both ends of the cooling pipe. A child winding cooling structure is shown. One manifold of the two manifolds has a structure for introducing the refrigerant into the cooling pipe, and the other manifold has a structure for extracting the refrigerant from the cooling pipe. In particular, in a linear motor movable element, when such a manifold is provided, the hose or the like of an external refrigerant supply device and a cooling pipe can be easily connected, and a highly reliable connection can be obtained. Conventionally, two manifolds are arranged apart from each other so as to be insulated from each other. FIGS. 11 and 12 show changes in the speed and current of the linear motor when both manifolds are electrically connected and insulated, respectively. As shown in both figures, if both manifolds are electrically connected, a voltage is induced in the metal cooling pipe and current flows, causing a decrease in linear motor speed fluctuation and a significant increase in current lip. It is.
JP 2002-218730 (FIGS. 4 and 8)

  However, when the two manifolds are insulated from each other as in the prior art, the structure of arranging the two manifolds becomes complicated. In addition, when a plurality of cooling pipes are arranged between two manifolds in the conventional structure, an induced current flows between the plurality of cooling pipes in an annular shape. Therefore, in the conventional structure, only one cooling pipe can be arranged between the two manifolds, and when the length of the cooling pipe is increased, the pressure loss of the refrigerant flowing in the metal cooling pipe is increased. There was a problem.

  An object of the present invention is to provide an armature winding cooling structure and a linear motor armature winding cooling structure capable of simplifying a structure for arranging a manifold.

  Another object of the present invention is to provide an armature winding cooling structure and a linear motor armature winding cooling structure capable of preventing pressure loss of refrigerant flowing in the cooling pipe.

  The armature winding cooling structure according to the present invention includes a metal cooling pipe arranged adjacent to the armature winding, and both ends of the cooling pipe are connected to introduce a refrigerant into the cooling pipe, and the cooling pipe And a metal manifold having a structure for deriving the refrigerant from. In the present invention, the cooling pipe and the manifold are annularly arranged. And at least one of the both ends of a cooling pipe and a manifold are electrically insulated. According to the present invention, even when the cooling pipe and the manifold are annularly arranged with one manifold, the cooling pipe and the manifold are electrically insulated from each other because at least one end of the cooling pipe is electrically insulated from the manifold. The induced current can be prevented from flowing. Therefore, the armature winding cooling structure can be configured with only one metal manifold, and the structure for arranging the manifold can be simplified. It may be possible to prevent the induced current from flowing between the cooling pipe and the manifold by forming the manifold with an insulator such as resin. However, if the manifold is formed with resin, the durability of the manifold will decrease. Even if tapping is performed on the manifold, a screw portion having high hardness cannot be formed. Therefore, the hose or the like of the refrigerant supply device that supplies the refrigerant to the cooling pipe and the manifold cannot be screwed together with sufficient strength.

  An armature winding cooling structure according to another invention of the present application includes a plurality of metal cooling pipes disposed adjacent to the armature windings and a pair of manifolds. The pair of manifolds includes a metal introduction-side manifold having a structure for introducing a refrigerant into the plurality of cooling pipes, one end of each of the cooling pipes being connected to each other, and a plurality of cooling pipes. The other end portion is connected to each other, and a metal outlet side manifold having a structure for leading the refrigerant from a plurality of cooling pipes is formed. In the present invention, a plurality of cooling pipes and a pair of manifolds are arranged in an annular shape. Then, at least one of both end portions of each of the plurality of cooling pipes is electrically insulated from the introduction side manifold or the outlet side manifold. In this armature winding cooling structure, at least one of both end portions of each of the plurality of cooling pipes is electrically insulated from the introduction side manifold or the outlet side manifold, so that the cooling pipe and the pair of manifolds are annularly formed. Since it is not electrically connected, it is possible to prevent an induced current from flowing through the cooling pipe and the pair of manifolds. As a result, it is possible to arrange a plurality of cooling pipes through which the refrigerant flows from the inlet manifold toward the outlet manifold. Therefore, the length dimension of one cooling pipe can be shortened, and the pressure loss of the refrigerant flowing through the cooling pipe can be reduced.

  In the above case, it is possible to employ a structure further including a reflux pipe that returns the refrigerant that has flowed to the outlet side manifold to the inlet side manifold. If it does in this way, members, such as a hose which returns a refrigerant | coolant to a refrigerant | coolant supply apparatus, will be connected to an introduction side manifold. Therefore, a member such as a hose that supplies the refrigerant from the refrigerant supply device and a member such as a hose that returns the refrigerant to the refrigerant supply device need only be connected to the introduction-side manifold, which can simplify the structure of the linear motor. it can.

  It is preferable that an insulating part made of an electrically insulating material is disposed between the cooling pipe and the manifold to achieve electrical insulation. In this way, electrical insulation between the cooling pipe and the manifold can be easily achieved.

  A cooling pipe insertion hole into which the end of the cooling pipe is inserted is formed in the main body of the manifold, and a cooling pipe mounting structure can be provided corresponding to the end of the cooling pipe. In this case, the cooling pipe mounting structure can be composed of an insulating cap, an insulating sleeve, an O-ring, a connection fitting, and a fixing means. The insulating cap is formed of an electrically insulating material, has a through hole that communicates with the internal flow path of the cooling pipe, has a structure that fits into the end of the cooling pipe and is inserted into the cooling pipe insertion hole together with the end. is doing. The insulating sleeve is formed of an electrically insulating material, and includes an annular portion through which the cooling pipe passes, and a sandwiching portion that deforms inward when a force is applied from the outside in the radial direction and sandwiches the cooling pipe, and is behind the insulating cap. Arranged on the side. The O-ring is sandwiched between a portion located on the opposite side to the sandwiching portion of the insulating sleeve and the insulating cap. The connection fitting has a structure in which the holding portion of the insulating sleeve is accommodated and a force is applied to the insulating sleeve when approaching the main body side of the manifold. The fixing means has a structure for fixing the connection fitting to the manifold while moving the connection fitting so as to approach the manifold. If comprised in this way, it can prevent that a refrigerant | coolant leaks from the clearance gap between a cooling pipe and the cooling pipe insertion hole of a manifold by O-ring. Further, since the insulating sleeve sandwiches the cooling pipe by the fixing means and the connection fitting, the metal cooling pipe can be reliably fixed to the manifold without leakage of the refrigerant.

  In particular, when the linear motor movable element is provided with a manifold, it becomes easy to connect the hose or the like of the external refrigerant supply device and the cooling pipe, and a highly reliable connection can be obtained. Therefore, if the present invention is used for cooling the armature winding of the mover of the linear motor, a high effect can be obtained.

  According to the present invention, even if the manifold is constituted by one manifold and the cooling pipe and the manifold are arranged in an annular shape, at least one of both ends of the cooling pipe is electrically insulated from the manifold. It is possible to prevent an induced current from flowing through the manifold. Therefore, the armature winding cooling structure can be configured with only one metal manifold, and the structure for arranging the manifold can be simplified. In addition, since no annular electrical connection is made between the cooling pipe and the manifold, it is possible to prevent an induced current from flowing through the cooling pipe and the manifold. Thereby, arrangement | positioning of the several cooling pipe into which a refrigerant | coolant flows toward the other manifold from one manifold of a pair of manifold was attained. Therefore, the length dimension of one cooling pipe can be shortened, and the pressure loss of the refrigerant flowing through the cooling pipe can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an armature winding cooling structure according to a first embodiment of the present invention disposed in a linear motor, and FIG. 2 is an embodiment of the present invention before being disposed in the linear motor. It is a perspective view of the armature winding cooling structure of a form. As shown in both figures, the armature winding cooling structure of the present example has one metal manifold 1 and one metal cooling pipe 3. As shown in FIGS. 3 and 4, the manifold 1 is formed in a rectangular parallelepiped block shape from brass, stainless steel, copper, aluminum, or the like, and is attached to an armature of a linear motor. An introduction side passage 5 and a discharge side passage 7 are formed inside the manifold 1. The introduction side passage 5 is connected to a supply hose of a refrigerant supply device (not shown) and has an intake port 8 through which refrigerant such as oil is supplied from the refrigerant supply device and an introduction port 9 for introducing the refrigerant into the cooling pipe 3 at both ends. In preparation. The outlet side passage 7 has an outlet 11 through which the refrigerant is led out from the cooling pipe 3 and an outlet 12 connected to the discharge hose of the refrigerant supply device to discharge the refrigerant to the refrigerant supply device at both ends. The introduction side passage 5 and the outlet side passage 7 are arranged substantially in parallel so that the intake port 8 and the discharge port 12 are arranged side by side, and the introduction port 9 and the outlet port 11 are arranged side by side. Yes.

  As shown in FIG. 5A, the introduction port 9 has a larger cross-sectional area than the introduction side passage 5 and is open to the surface of the manifold 1 so that the end of the cooling pipe 3 can be inserted. 5 and a step surface 9 a formed between the inner surface 5 and the inner peripheral surface 9 b formed between the step surface 9 a and the surface of the manifold 1. The outlet port 11 has the same structure as the inlet port 9 and has a larger cross-sectional area than the outlet side passage 7 so that the end of the cooling pipe 3 can be inserted, and opens to the surface of the manifold 1. And a step surface 11 a formed between the lead-out side passage 7 and an inner peripheral surface 11 b formed between the step surface 11 a and the surface of the manifold 1. Thus, in this example, the inlet 9 and the outlet 11 constitute a cooling pipe insertion hole into which the end of the cooling pipe 3 is inserted. One end of the cooling pipe 3 is inserted into the inlet 9, and the other end of the cooling pipe 3 is inserted into the outlet 11. A mode in which one end and the other end of the cooling pipe 3 are connected to the inlet 9 and the outlet 11 will be described in detail later.

  Returning to FIG. 1 and FIG. 2, the cooling pipe 3 is a cylindrical pipe made of copper or aluminum, and has a zigzag folded portion 3 a extending in a plurality of directions and a linear portion 3 b extending linearly. The zigzag folded portion 3a is located on one end side connected to the inlet 9 side of the manifold 1, and is formed between the adjacent windings C and C of the nine windings C of the armature of the linear motor. In order to pass, it is arranged adjacent to the winding C through an insulating film (not shown). In this example, a coreless type linear motor having no core around which a winding is wound is used. The straight line portion 3 b is located on the other end side connected to the outlet 11 side of the manifold 1. With the configuration described above, the cooling pipe 3 and the manifold 1 are arranged in an annular shape, and the refrigerant introduced from the manifold 1 into the cooling pipe 3 passes through the folded portion 3a and the straight portion 3b to the manifold 1. Derived. Then, the winding C of the armature is cooled through the folded portion 3a of the cooling pipe 3.

  As shown in FIGS. 5A and 5B, an insulating component 13 made of an electrically insulating material is disposed between one and other ends of the cooling pipe 3 and the inlet 9 and outlet 11 of the manifold 1. The one end and the other end of the cooling pipe 3 and the inlet 9 and outlet 11 of the manifold 1 are electrically insulated and connected to each other. The insulating member 13 includes an insulating cap 15, an O-ring 17, and an insulating sleeve 19. The insulating cap 15 is made of POM (polyoxymethylene) or PPS (polyphenylene sulfide), and integrally includes an annular portion 15a and a cylindrical portion 15b extending from the peripheral edge of the annular portion 15a. It is fitted into the end or the other end and is inserted into the inlet 9 or outlet 11 together with the end. The annular portion 15a is sandwiched between the stepped surfaces 9a, 11a of the supply side port 9 or the outlet port 11 and the end surface of one end or the other end of the cooling pipe 3, and the introduction side passage 5 is provided at the center. Alternatively, there are through-holes 15 c that communicate with the outlet-side passage 7 and the internal flow path of the cooling pipe 3, respectively. The cylindrical portion 15b is sandwiched between the inner peripheral surfaces 9b and 11b of the inlet 9 or the outlet 11 and the outer peripheral surface near one end of the cooling pipe 3 or the other end.

  The O-ring 17 is made of NBR (nitrile rubber) or FPM (fluororubber), and is cooled while being sandwiched between the insulating cap 15 and a portion located on the side opposite to the sandwiching portion 19b of the insulating sleeve 19 described later. The tube 3 is fitted on the outer periphery. And it arrange | positions in the clearance gap between the inner peripheral surfaces 9b and 11b of the inlet 9 or the outlet 11, and the outer peripheral surface of the cooling pipe 3, and seals this gap | interval.

  The insulating sleeve 19 is a cylindrical body made of POM (polyoxymethylene) or PPS (polyphenylene sulfide), and is disposed on the rear side of the insulating cap 15, and the annular portion 19 a through which the cooling pipe 3 passes and the cooling pipe 3. And a clamping part 19b for clamping the. The annular portion 19 a is fitted into the opening of the inlet 9 or outlet 11. The clamping part 19b has a cylindrical clamping body 19c whose end abuts against the peripheral edge of the opening of the inlet 9 or the outlet 11 and a truncated cone-shaped cone 19d. A plurality of slits 19e are formed in the sandwiching portion 19b from the conical portion 19d to the sandwiching body 19c, and sandwich the cooling pipe 3 as will be described later.

  The connection fitting 21 is a cylindrical body made of aluminum, and the internal through-hole 21a has a shape along the outer surface of the sandwiching body 19c of the insulating sleeve 19 and a shape along the outer surface of the conical portion 19d. The second portion 21c and the third portion 21d through which the cooling pipe 3 penetrates at an interval so as not to come into contact with the cooling pipe 3 are included. Further, the connection fitting 21 is formed with two through holes 21e extending in parallel with the through gap 21a. The connection fitting 21 is fixed to the manifold 1 by a screw 23 that passes through the through hole 21e and is screwed into a screw hole 1a formed in the manifold 1. When the connection fitting 21 is fixed to the manifold 1 in this way, when the screw 23 is tightened and the connection fitting 21 is moved closer to the manifold 1, the second portion 21 c in the connection fitting 21 becomes a conical shape of the sleeve 19. A force is applied to the insulating sleeve 19 so as to make strong contact with the portion 19d, and the clamping portion 19b in which the plurality of slits 19e are formed is deformed inward by applying a force from the radially outer side. Thereby, the clamping part 19b clamps the cooling pipe 3 by tightening the cooling pipe 3 toward the center line of the cooling pipe 3. In this example, the screw 23 and the screw hole 1a constitute a fixing means for fixing the connection fitting 21 to the manifold 1, and the insulating cap 15, the insulating sleeve 19, the O-ring 17, the connection fitting 21, and the fixing means 23, 1a. Constitutes a cooling pipe mounting structure.

  In the cooling structure for a linear motor of this example, an insulating component 13 made of an electrically insulating material is disposed between one and other ends of the cooling pipe 3 and the inlet 9 and outlet 11 of the manifold 1. Thus, the two are electrically insulated. Therefore, even if the manifold is composed of one manifold 1 and the cooling pipe 3 and the manifold 1 are annularly arranged, it is possible to prevent induced current from flowing through the cooling pipe 3 and the manifold 1. As a result, the armature winding cooling structure can be configured with only one manifold 1, and the structure for arranging the manifold can be simplified.

  In the above example, both the one end and the other end of the cooling pipe 3 are connected to the inlet 9 and the outlet 11 of the manifold 1 with the insulating member 13 interposed therebetween. Only one end of the other end may be configured with the insulating member 13 interposed therebetween.

  FIG. 6 is a perspective view of the armature winding cooling structure according to the second embodiment of the present invention arranged in the linear motor. The armature winding cooling structure of the present example has the same structure as the linear motor cooling structure of the first embodiment shown in FIGS. 1 to 5 except for the structure of the cooling pipe 3. For this reason, the same members as those in the linear motor cooling structure according to the first embodiment are denoted by reference numerals obtained by adding 100 to the reference numerals assigned to FIGS. The linear motor R in which the armature winding cooling structure of this example is arranged includes a stator R1 and an armature R2 that constitutes a mover that reciprocates with respect to the stator R1. The stator R1 has a pair of support members R3 and a yoke R4 supported at both ends by the pair of support members R3. The yoke R4 is configured by laminating a plurality of magnetic steel plates, and a magnetic pole array composed of a plurality of permanent magnets R5 is formed therein. The armature R2 includes a cylindrical frame R6 that is disposed so as to surround the yoke R4, and six windings R7 that are wound around the frame R6.

  The metal manifold 101 of the armature winding cooling structure of this example is fixed to the side surface of the cylindrical frame R6. The metal cooling pipe 103 has a winding portion 103a that is bent and extended so as to wind, and a linear portion 103b that extends linearly so as to cross the outside of the winding portion 103a. The winding portion 103a is located on one end side connected to the inlet 109 side of the manifold 101, and is insulated from the winding R7 so as to cover the outer periphery of the six windings R7 of the armature R2 of the linear motor. Adjacent through the film. The straight line portion 103 b is located on the other end side connected to the outlet port 111 side of the manifold 1. Thereby, the refrigerant introduced into the cooling pipe 103 via the manifold 101 is led out to the manifold 101 through the winding portion 103a and the straight portion 103b. Thereby, the winding R7 of the armature is cooled via the winding portion 103a of the cooling pipe 103.

  7 to 10 are a front view, a rear view, a side view, and a plan view of the armature winding cooling structure according to the third embodiment of the present invention arranged in the linear motor. The armature winding cooling structure of this example includes a pair of metal manifolds including an introduction side manifold 201 and a discharge side manifold 225, a plurality of (two in this example) metal cooling pipes 203A and 203B, And a reflux pipe 227. The introduction side manifold 201 is formed in a block shape and is attached to the armature of the linear motor. Further, an introduction side passage 205 and a flow passage 229 are formed inside the introduction side manifold 201. The introduction side passage 205 has a branch structure that sends the refrigerant from one intake port 208 to a plurality of (two in this example) introduction ports 209A and 209B. More specifically, the introduction side passage 205 is composed of one passage extending in the longitudinal direction of the introduction side manifold 201, and both ends of the introduction side passage 205 are one introduction port 209A of the intake port 208 and the two introduction ports 209A and 209B. The intermediate portion near the intake port 208 communicates with the other introduction port 209B of the two introduction ports 209A and 209B. The intake port 208 is formed on the first surface 201a of the introduction-side manifold 201, and the two introduction ports 209A and 209B are arranged on a second surface 201b that is orthogonal to and adjacent to the first surface 201a. It is formed with. Both of the two inlets 209A and 209B have substantially the same structure as the inlet 9 of the first embodiment described with reference to FIG. 5A. However, the step surface 209a of the two introduction ports 209A and 209B is formed by a surface parallel to the direction in which the introduction side passage 205 extends, as shown in FIG.

  The flow passage 229 has a structure including a refrigerant inlet 231 and a refrigerant outlet 235 at both ends. The refrigerant inlet 231 is formed on the third surface 201c facing the first surface 201a, and the refrigerant outlet 235 is formed on the first surface 201a along with the intake port 208. The intake 208 and the refrigerant outlet 235 are respectively connected to a supply hose and a discharge hose of a refrigerant supply device (not shown).

  The outlet side manifold 225 is also formed in a block shape like the inlet side manifold 201 and is attached to the armature of the linear motor. An outlet side passage 207 is formed inside the outlet side manifold 225. The outlet side passage 207 has a structure for sending refrigerant from a plurality (two in this example) of outlets 211A and 211B to one outlet 212. More specifically, the lead-out side passage 207 is composed of a single passage extending in the longitudinal direction of the lead-out side manifold 225, and both ends have two lead-out ports 211A and 211B, the other lead-out port 211B and the discharge port 212. And an intermediate portion near the discharge port 212 communicates with one of the two outlets 211A and 211B. The discharge port 212 is formed on the first surface 225a of the outlet side manifold 225, and the two outlet ports 211A and 211B are arranged on a second surface 225b that is adjacent to and orthogonal to the first surface 225a. It is formed with. The two outlets 211A and 211B have substantially the same structure as the inlet 9 of the first embodiment described with reference to FIG. 5A, similarly to the two inlets 209A and 209B. However, the step surface 211a of the two outlets 211A and 211B is formed by a surface parallel to the direction in which the outlet side passage 207 extends, as shown in FIG.

  The two cooling pipes 203A and 203B have a zigzag shape that is bent and extended in plural, and between adjacent windings of the armature winding of the linear motor configured by providing the core with a winding. In order to pass, it is arranged adjacent to the winding via an insulating film. One end of the two cooling pipes 203A and 203B is inserted into the two inlets 209A and 209B of the introduction side manifold 201, respectively, and one end of the two cooling pipes 203A and 203B is In the same manner as the first embodiment shown in FIGS. 5A and 5B, they are connected to both inlets 209A and 209B via an insulating member 213 so as not to contact each other. Thereby, the refrigerant is introduced from the introduction side manifold 201 to the cooling pipes 203A and 203B. Further, the other ends of the two cooling pipes 203A and 203B are inserted into the two outlets 211A and 211B of the outlet side manifold 225, respectively, and the first embodiment shown in FIGS. 5A and 5B. In the same manner, they are connected to both outlets 211A and 211B through an insulating member 213 so as not to contact each other. Accordingly, the refrigerant is led out from the cooling pipes 203A and 203B to the outlet side manifold 225.

  The reflux pipe 227 is made of a metal material such as copper or aluminum, and both ends thereof are connected to the discharge port 212 of the outlet side manifold 225 and the refrigerant inlet 231 of the inlet side manifold 201 by appropriate means such as brazing.

  With the above configuration, the cooling pipes 203A and 203B and the pair of manifolds 201 and 225 are annularly arranged, and the cooling pipes 203A and 203B are disposed in the two cooling pipes 203A and 203B from the introduction side manifold 201 toward the outlet side manifold 225. The refrigerant flows, and the refrigerant that has flowed to the outlet side manifold 225 returns to the introduction side manifold 201 through the reflux pipe 227. Thereby, the winding of the armature is cooled via the cooling pipes 203A and 203B. In the linear motor cooling structure of this example, between the one and other ends of the cooling pipes 203A and 203B and the inlets 209A and 209B of the inlet manifold 201 and the outlets 211A and 211B of the outlet manifold 225, An insulating component 213 made of an electrically insulating material is disposed, and the two are electrically insulated. Therefore, since the two cooling pipes 203A and 203B are not electrically connected to the introduction side manifold 201 and the outlet side manifold 225 in an annular shape, an induced current flows through the cooling pipes 203A and 203B and the manifolds 201 and 225. Can be prevented. Therefore, it is possible to dispose a plurality of (two in this example) cooling pipes 203A and 203B in which the refrigerant flows from the inlet manifold 201 toward the outlet manifold 225. As a result, the length of one cooling pipe (203A or 203B) can be shortened, and the pressure loss of the refrigerant flowing in the cooling pipes 203A and 203B can be reduced.

  In the above example, one end and the other end of the two cooling pipes 203A and 203B are connected to the introduction ports 209A and 209B of the introduction side manifold 201 and the outlet side manifold 225 via the insulating member 213 therebetween. Although connected to the outlets 211A and 211B, respectively, it suffices that at least one of both end portions of the two cooling pipes 203A and 203B and the introduction side manifold 201 or the outlet side manifold 225 are electrically insulated. For example, there are only two connections: one end of the cooling pipe 203A and the inlet 209A of the inlet manifold 201, and one end of the cooling pipe 203B and the inlet 209B of the inlet manifold 201. May be performed with the insulating member 213 interposed therebetween. Further, there are only two connections, the connection between the other end of the cooling pipe 203A and the outlet 211A of the outlet manifold 225, and the connection between the other end of the cooling pipe 203B and the outlet 211B of the outlet manifold 225. May be performed with the insulating member 213 interposed therebetween. Further, there are only two connections: one end of the cooling pipe 203A and the inlet 209A of the inlet manifold 201, and the other end of the cooling pipe 203B and the outlet 211B of the outlet manifold 225. May be performed with the insulating member 213 interposed therebetween. Further, there are only two connections: a connection between the other end of the cooling pipe 203A and the outlet 211A of the outlet manifold 225, and a connection between one end of the cooling pipe 203B and the inlet 209B of the inlet manifold 201. May be performed with the insulating member 213 interposed therebetween. However, in order to surely prevent the current from being generated in the cooling pipes 203 </ b> A and 203 </ b> B, it is preferable to make many connections through the insulating member 213.

It is a perspective view of the cooling structure for linear motors of the 1st Embodiment of this invention arrange | positioned in a linear motor. It is a perspective view of the cooling structure for linear motors of the 1st Embodiment of this invention before arrange | positioning in a linear motor. FIG. 2 is a plan view of the vicinity of a metal manifold of the linear motor cooling structure shown in FIG. 1. FIG. 2 is a side view of the vicinity of a metal manifold of the linear motor cooling structure shown in FIG. 1. It is a figure which shows the supply port or receiving port of the metal manifold of the cooling structure for linear motors shown in FIG. 1, and the insulating member before arrangement | positioning in a supplying port or in a receiving port. It is a figure which shows the metal cooling pipe 3 joined via the supply port or receiving port of the metal manifold of the cooling structure for linear motors shown in FIG. 1, and the insulating member. It is a perspective view of the cooling structure for linear motors of the 2nd Embodiment of this invention arrange | positioned in a linear motor. It is a front view of the cooling structure for linear motors of the 3rd Embodiment of this invention. It is a rear view of the cooling structure for linear motors shown in FIG. It is a side view of the cooling structure for linear motors shown in FIG. It is a top view of the cooling structure for linear motors shown in FIG. In the conventional cooling structure for linear motors, it is a figure which shows the change of the speed and electric current of a linear motor when the metal introduction side manifold and the metal extraction side manifold are electrically connected. It is a figure which shows the change of the speed and electric current of a linear motor in the case of the conventional cooling structure for linear motors, when the metal introduction side manifold and the metal extraction side manifold are electrically insulated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manifold 3 Cooling pipe 5 Introducing side passage 7 Outlet side passage 9 Inlet 11 Outlet 13 Insulating member 15 Insulating cap 17 Insulating sleeve 19 Insulating sleeve 21 Fitting 201 Introducing manifold 225 Outlet side manifold 203A, 203B Cooling pipe 227 Reflux tube

Claims (5)

A metal cooling pipe placed adjacent to the armature winding;
Both ends of the cooling pipe are connected to each other, and a metal manifold having a structure for introducing the refrigerant into the cooling pipe and leading out the refrigerant from the cooling pipe,
The cooling pipe and the manifold are arranged in an annular shape,
At least one of the both ends of the cooling pipe and the manifold are electrically insulated ;
An insulating part made of an electrically insulating material is disposed between the cooling pipe and the manifold, and the electrical insulation is realized.
A cooling pipe insertion hole into which the end of the cooling pipe is inserted is formed in the main body of the manifold,
Furthermore, a cooling pipe mounting structure is provided corresponding to the end of the cooling pipe,
The cooling pipe mounting structure is
An insulating cap formed of an electrically insulating material, provided with a through-hole communicating with the internal flow path of the cooling pipe, fitted into the end of the cooling pipe, and inserted into the cooling pipe insertion hole together with the end; ,
It is formed of an electrically insulating material, and includes an annular portion through which the cooling pipe penetrates, and a sandwiching portion that deforms inward when a force is applied from the outside in the radial direction, and sandwiches the cooling pipe. The insulating sleeve disposed on the side opposite to the direction in which the insulating cap is inserted into the cooling pipe insertion hole;
An O-ring sandwiched between a portion of the insulating sleeve located on the opposite side of the clamping portion and the insulating cap;
A fitting that accommodates the clamping portion of the insulating sleeve and applies the force to the insulating sleeve when approaching the main body side of the manifold;
An armature winding cooling structure comprising: fixing means for fixing the connection fitting to the manifold while moving the connection fitting so as to approach the manifold . A plurality of metal cooling pipes arranged adjacent to the armature winding;
One end of both ends of the plurality of cooling pipes is connected to each other, and a metal introduction-side manifold having a structure for introducing a refrigerant into the plurality of cooling pipes, and the other of the plurality of cooling pipes A pair of manifolds each having an end connected to each other and a metal outlet side manifold having a structure for leading the refrigerant from the plurality of cooling pipes;
The plurality of cooling pipes and the pair of manifolds are arranged in an annular shape,
At least one of the both end portions of each of the plurality of cooling pipes is electrically insulated from the introduction side manifold or the outlet side manifold ;
An insulating part made of an electrically insulating material is disposed between the electrically insulated cooling pipe and the manifold, and the electrical insulation is realized,
A cooling pipe insertion hole into which the end of the cooling pipe is inserted is formed in the main body of the manifold,
Furthermore, a cooling pipe mounting structure is provided corresponding to the end of the cooling pipe,
The cooling pipe mounting structure is
An insulating cap formed of an electrically insulating material, provided with a through-hole communicating with the internal flow path of the cooling pipe, fitted into the end of the cooling pipe, and inserted into the cooling pipe insertion hole together with the end; ,
It is formed of an electrically insulating material, and includes an annular portion through which the cooling pipe penetrates, and a sandwiching portion that deforms inward when a force is applied from the outside in the radial direction, and sandwiches the cooling pipe. The insulating sleeve disposed on the side opposite to the direction in which the insulating cap is inserted into the cooling pipe insertion hole;
An O-ring sandwiched between a portion of the insulating sleeve located on the opposite side of the clamping portion and the insulating cap;
A fitting that accommodates the clamping portion of the insulating sleeve and applies the force to the insulating sleeve when approaching the main body side of the manifold;
An armature winding cooling structure comprising: fixing means for fixing the connection fitting to the manifold while moving the connection fitting so as to approach the manifold .   The armature winding cooling structure according to claim 2, further comprising a return pipe that returns the refrigerant that has flowed to the outlet-side manifold to the inlet-side manifold. A metal cooling pipe disposed adjacent to the armature winding constituting the mover of the linear motor;
Both ends of the cooling pipe are connected to each other, and a metal manifold having a structure for introducing the refrigerant into the cooling pipe and leading out the refrigerant from the cooling pipe,
The cooling pipe and the manifold are arranged in an annular shape,
At least one of the both ends of the cooling pipe and the manifold are electrically insulated ;
An insulating part made of an electrically insulating material is disposed between the cooling pipe and the manifold, and the electrical insulation is realized.
A cooling pipe insertion hole into which the end of the cooling pipe is inserted is formed in the main body of the manifold,
Furthermore, a cooling pipe mounting structure is provided corresponding to the end of the cooling pipe,
The cooling pipe mounting structure is
An insulating cap formed of an electrically insulating material, provided with a through-hole communicating with the internal flow path of the cooling pipe, fitted into the end of the cooling pipe, and inserted into the cooling pipe insertion hole together with the end; ,
An annular portion that is formed of an electrically insulating material and through which the cooling pipe penetrates, and a clamping portion that deforms inward when a force is applied from the outside in the radial direction and clamps the cooling pipe, than the insulating cap, The insulating sleeve disposed on the side opposite to the direction in which the insulating cap is inserted into the cooling pipe insertion hole;
An O-ring sandwiched between a portion of the insulating sleeve located on the opposite side of the clamping portion and the insulating cap;
A fitting that accommodates the clamping portion of the insulating sleeve and applies the force to the insulating sleeve when approaching the main body side of the manifold;
An armature winding cooling structure for a linear motor , comprising: fixing means for fixing the connection fitting to the manifold while moving the connection fitting so as to approach the manifold . A plurality of metal cooling pipes arranged adjacent to the armature winding constituting the mover of the linear motor;
One end of both ends of the plurality of cooling pipes is connected to each other, and a metal introduction-side manifold having a structure for introducing a refrigerant into the plurality of cooling pipes, and the other of the plurality of cooling pipes A pair of manifolds each having an end connected to each other and a metal outlet side manifold having a structure for leading the refrigerant from the plurality of cooling pipes;
The plurality of cooling pipes and the pair of manifolds are arranged in an annular shape,
At least one of the both end portions of each of the plurality of cooling pipes is electrically insulated from the inlet manifold or outlet manifold ;
An insulating part made of an electrically insulating material is disposed between the electrically insulated cooling pipe and the manifold, and the electrical insulation is realized,
A cooling pipe insertion hole into which the end of the cooling pipe is inserted is formed in the main body of the manifold,
Furthermore, a cooling pipe mounting structure is provided corresponding to the end of the cooling pipe,
The cooling pipe mounting structure is
An insulating cap formed of an electrically insulating material, provided with a through hole communicating with the internal flow path of the cooling pipe, fitted into the end of the cooling pipe, and inserted into the cooling pipe insertion hole together with the end; ,
An annular portion that is formed of an electrically insulating material and through which the cooling pipe penetrates, and a clamping portion that deforms inward when a force is applied from the outside in the radial direction and clamps the cooling pipe, than the insulating cap, The insulating sleeve disposed on the side opposite to the direction in which the insulating cap is inserted into the cooling pipe insertion hole;
An O-ring sandwiched between a portion of the insulating sleeve located on the opposite side of the clamping portion and the insulating cap;
A fitting that accommodates the clamping portion of the insulating sleeve and applies the force to the insulating sleeve when approaching the main body side of the manifold;
An armature winding cooling structure for a linear motor , comprising: fixing means for fixing the connection fitting to the manifold while moving the connection fitting so as to approach the manifold .

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