Haulage machine and elevator

Abstract

The traction machine of the present application includes a main shaft and a plurality of traction machine units. The traction machine unit includes a stator frame and a rotor support portion. The stator frame has a shaft portion fixed to the main shaft and a stator fixed thereto. A rotor rotatably supported on the shaft portion and opposed to the stator is fixed. Further, a ventilation hole for passing air along the axial direction of the main shaft and delivering the air to the other traction machine units is formed in the traction machine unit.

Description

Technical Field

[0001] The present invention relates to a traction machine for lifting and lowering a car or counterweight, and an elevator having the traction machine. Background Technology

[0002] Elevators are equipped with traction machines, which use main ropes to move the car and counterweight, among other lifting components, up and down. For example, a conventional traction machine is described in Patent Document 1.

[0003] Patent Document 1 discloses a rotary electric motor comprising: a stator having a stator core, an excitation coil disposed on the stator core, and a first support supporting the stator core and the excitation coil; and a rotor having magnetic pole portions and a second support supporting the magnetic pole portions. Furthermore, in the technology disclosed in Patent Document 1, air delivery blades are located on the inner periphery of the stator core and the excitation coil, and these air delivery blades have multiple blades and rotate with the rotation of the rotor.

[0004] In addition, in recent years, some people have proposed traction machines that set up multiple traction machine units on a single main shaft. Existing technical documents Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-50908 Summary of the Invention The technical problem that the invention aims to solve

[0006] However, the technology described in Patent Document 1 can cool each traction machine unit itself among multiple traction machine units, but it does not help cool other traction machine units. Therefore, when multiple traction machine units are arranged along the axial direction of the main shaft, the load will be concentrated on specific traction machine units such as the traction machine unit located in the center of the main shaft, causing heat accumulation and reducing the overall cooling capacity of the traction machine.

[0007] The purpose of this invention is to address the aforementioned problems by providing a traction machine and elevator that can improve the overall cooling capacity of the traction machine. Technical solutions to solve technical problems

[0008] To address the aforementioned problems and achieve the objectives of this invention, a traction machine includes: a main shaft; and a plurality of traction machine units mounted axially along the main shaft. Each traction machine unit includes a stator frame and a rotor support. The stator frame has a stator fixed to it and a shaft portion fixed to the main shaft. A rotor is fixed opposite to the stator and is rotatably supported on the shaft portion of the stator frame. Furthermore, ventilation holes are formed on the traction machine unit to allow air to pass through axially along the main shaft and to deliver air to other traction machine units.

[0009] In addition, the elevator includes: a lifting body that moves up and down in a shaft; ropes connected to the lifting body; and a traction machine that moves the lifting body up and down by winding the ropes. Furthermore, the traction machine used is the aforementioned type. Invention Effects

[0010] The traction machine and elevator with the above structure can improve the overall cooling capacity of the traction machine. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view showing the traction machine according to Embodiment Example 1. Figure 2 This is a side view showing the traction machine unit of the traction machine according to Embodiment Example 1. Figure 3 This is an exploded perspective view showing the traction machine unit of the traction machine according to Embodiment Example 1. Figure 4 This is an explanatory diagram showing the ventilation path of the traction machine according to Embodiment Example 1. Figure 5 This is a cross-sectional view showing the traction machine according to Embodiment Example 2. Figure 6 This is a cross-sectional view showing the traction machine according to Embodiment Example 3. Figure 7 This is a cross-sectional perspective view of the traction machine according to Embodiment Example 4. Figure 8 This is an explanatory diagram showing the ventilation path of the traction machine according to Embodiment Example 4. Figure 9 This is a cross-sectional view showing the traction machine according to Embodiment Example 5. Figure 10 This is a cross-sectional view showing the traction machine according to Embodiment Example 6. Figure 11 This is a cross-sectional view showing the traction machine according to Embodiment Example 7. Detailed Implementation

[0012] In the following text, refer to Figures 1 to 11 Examples of implementation methods for traction machines and elevators are provided. Additionally, common components are labeled with the same reference numerals in all drawings.

[0013] 1. Implementation Example 1 1-1. The structure of an elevator First, refer to Figures 1 to 3 The structure of the traction machine involved in Implementation Example 1 (hereinafter referred to as "this Example") is described. Figure 1 This is a cross-sectional view showing the traction machine. Figure 2 This is a cross-sectional view showing the traction machine unit that constitutes the traction machine. Figure 3 This is an exploded perspective view of the traction machine unit.

[0014] Figure 1 The traction machine shown is used in elevators, and is a device that moves the elevator body, consisting of the car and counterweight, up and down via main ropes. For example... Figure 1 As shown, the traction machine 1 includes a main shaft 4, multiple traction machine units 31, 32, and 33, and a support (not shown) that supports the main shaft 4. The traction machine units 31, 32, and 33 each have a first stator 10A and a first rotor 13A constituting a first motor 14A, and a second stator 10B and a second rotor 13B constituting a second motor 14B.

[0015] Next, the direction parallel to the axis of the main shaft 4 is defined as the first direction X, and the direction orthogonal to the first direction X and also orthogonal to the vertical direction (up and down direction) is defined as the second direction Y. In addition, the direction orthogonal to the first direction X and the second direction Y, i.e., the up and down direction, is defined as the third direction Z.

[0016] The first traction machine unit 31 is disposed at one end of the main shaft 4 in the first direction X, and the third traction machine unit 33 is disposed at the other end of the main shaft 4 in the first direction X. The second traction machine unit 32 is disposed in the middle of the main shaft 4 in the first direction X and is located between the first traction machine unit 31 and the third traction machine unit 33.

[0017] [Traction Machine Unit] Next, the structures of traction machine units 31, 32, and 33 will be described. Since traction machine units 31, 32, and 33 have the same structure, the third traction machine unit 33 will be described here. In the following description, the third traction machine unit 33 will be referred to simply as traction machine unit 33.

[0018] like Figure 2 and Figure 3 As shown, the traction machine unit 33 includes a first stator frame 7, a second stator frame 9, a rotor support 12, and a traction sheave 15. The first stator frame 7 is disposed at one end in the first direction X, and the second stator frame 9 is disposed at the other end in the first direction X. The first stator frame 7 and the second stator frame 9 are arranged opposite to each other in the first direction X. In addition, the first stator frame 7 and the second stator frame 9, which are shown as housings, are formed into generally circular plates.

[0019] On one surface of the first stator frame 7 opposite to the second stator frame 9, the first stator 10A is fixed to the outer side of the first stator frame 7 in the radial direction. Furthermore, on one surface of the second stator frame 9 opposite to the first stator frame 7, the second stator 10B is fixed to the outer side of the second stator frame 9 in the radial direction.

[0020] Furthermore, a shaft portion 6 is formed at the center of the second stator frame 9 in the radial direction. The shaft portion 6 is cylindrical and protrudes from one end of the second stator frame 9 in the radial direction toward a first direction X, i.e., toward the first stator frame 7. The end of the shaft portion 6 on the first stator frame 7 side is fixed to the first stator frame 7 by a fixing bolt 8. A space is formed between the first stator frame 7 and the second stator frame 9. A rotor support portion 12 is rotatably supported on the outer peripheral surface of the shaft portion 6 in the radial direction via a bearing 11. The rotor support portion 12 is disposed in the space formed between the first stator frame 7 and the second stator frame 9.

[0021] The main shaft 4 is inserted into the cylindrical hole 19 of the shaft portion 6. A mounting recess 18 is formed at the other end of the shaft portion 6 in the first direction X. The mounting recess 18 is formed on the concentric circles of the cylindrical hole 19 of the shaft portion 6. The mounting recess 18 is a recess that is recessed from the other end of the shaft portion 6 in the first direction X toward one end. A fixing member 5 is located between the mounting recess 18 and the main shaft 4. The fixing member 5 consists of two cylindrical portions with a wedge-shaped cross-section and a fastening bolt. By tightening the fastening bolt, the outer circumferential surface of the cylindrical portions presses against the inner surface of the mounting recess 18, and the inner circumferential surface of the cylindrical portions presses against the outer circumferential surface of the main shaft 4. Thus, the stator frames 7 and 9 and the main shaft 4 are securely connected via the fixing member 5, and the rotation and movement of the stator frames 7 and 9 in the first direction X are restricted.

[0022] As a fixing component 5, it is not limited to the structure described above, but various other fixing components can be used.

[0023] Next, the rotor support portion 12 will be described. The rotor support portion 12 is formed in a generally circular plate shape. A through hole is formed at the center of the rotor support portion 12 in the radial direction. A bearing 11 is installed in this through hole. The rotor support portion 12 is rotatably supported on the shaft portion 6 via the bearing 11.

[0024] The traction sheave 15 is fixed to the outer edge of the rotor support 12 in the radial direction via fixing bolts 50. The main rope, which is connected to the elevator car and counterweight, is wound around it. Driven by the traction machine 1, the traction sheave 15 rotates, and the main rope wound on the traction sheave 15 moves.

[0025] Furthermore, the first rotor 13A is fixed to the outer radial direction of the rotor support portion 12 at a location opposite to the first stator frame 7. Additionally, the first rotor 13A is positioned to the outer radial direction of the first stator 10A, which is fixed to the first stator frame 7. Moreover, the first rotor 13A and the first stator 10A are positioned opposite each other with a predetermined gap.

[0026] Furthermore, the second rotor 13B is fixed to the outer radial direction of the rotor support portion 12 at a location opposite to the second stator frame 9. Additionally, the second rotor 13B is positioned outer radially of the second stator 10B, which is fixed to the second stator frame 9. Moreover, the second rotor 13B and the second stator 10B are positioned opposite each other with a predetermined gap.

[0027] Next, the cooling structure of the traction machine 1 having the above structure will be described. like Figure 2 and Figure 3 As shown, a first ventilation hole 100 and a second ventilation hole 101 are formed on the first stator frame 7 and the second stator frame 9. The first ventilation hole 100 is formed on the central side of the first stator frame 7 and the second stator frame 9 in the radial direction. The second ventilation hole 101 is formed on the outer side of the first stator frame 7 and the second stator frame 9 in the radial direction, which is further away from the first ventilation hole 100.

[0028] In addition, such as Figure 1 As shown, the first ventilation hole 100 and the second ventilation hole 101 of the first traction machine unit 31 are connected to the first ventilation hole 100 and the second ventilation hole 101 of the second traction machine unit 32. Moreover, the first ventilation hole 100 and the second ventilation hole 101 of the third traction machine unit 33 are connected to the first ventilation hole 100 and the second ventilation hole 101 of the second traction machine unit 32.

[0029] Furthermore, a first rotor-side ventilation hole 104, a second rotor-side ventilation hole 105, and a blower fan 110 are formed in the rotor support portion 12. The first rotor-side ventilation hole 104 is formed on the radially central side of the rotor support portion 12 and faces the first ventilation hole 100 formed in the first stator frame 7 and the second stator frame 9. The second rotor-side ventilation hole 105 is formed on the radially outer side of the rotor support portion 12, which is closer to the first rotor-side ventilation hole 104, and faces the second ventilation hole 101 formed in the first stator frame 7 and the second stator frame 9. Moreover, the first rotor-side ventilation hole 104 and the second rotor-side ventilation hole 105 connect the internal spaces of the first stator frame 7 and the second stator frame 9, which are divided by the rotor support portion 12.

[0030] An exhaust fan 110 is formed on the surfaces of the rotor support portion 12 opposite to the first stator frame 7 and opposite to the second stator frame 9. Furthermore, the exhaust fan 110 is disposed between the first rotor-side ventilation hole 104 and the second rotor-side ventilation hole 105. In this example, the exhaust fan 110 is a centrifugal fan that delivers air outward in the radial direction.

[0031] In addition, such as Figure 1As shown, gaps are formed between the first traction machine unit 31 and the second traction machine unit 32, and between the second traction machine unit 32 and the third traction machine unit 33. These gaps constitute radial ventilation holes 103 for air to pass outward in the radial direction towards the traction machine units 31, 32, and 33.

[0032] 1-2. Example of cooling action Next, we will refer to Figure 4 Explain the cooling operation of the traction machine 1 with the above structure. Figure 4 This is an explanatory diagram showing the ventilation path of traction machine 1.

[0033] like Figure 4 As shown, when the rotor support 12 of each traction machine unit 31, 32, 33 of the traction machine 1 rotates, the blower fan 110 provided on the rotor support 12 generates pressure that causes air to flow from the radial inside to the outside. Therefore, the pressure on the radial inside of the blower fan 110 is lower than the surrounding atmospheric pressure. As a result, air AF1 and AF2 flow inward from the first ventilation holes 100 of the first traction machine unit 31 and the third traction machine unit 33 toward the first direction X. In addition, the air AF1 and AF2 passing through the first ventilation holes 100 of the first traction machine unit 31 and the third traction machine unit 33 flows into the second traction machine unit 32 through the first rotor side ventilation hole 104 and the first ventilation hole 100 of the second traction machine unit 32.

[0034] The air AF1 and AF2 flowing into each of the traction machine units 31, 32, and 33 becomes an airflow AF3 from the radially inward side to the outward side via the blower fan 110. A portion of the airflow AF3 through the first traction machine unit 31 becomes an airflow AF5 flowing from the second ventilation hole 101 to the outer side in the first direction X. Similarly, a portion of the airflow AF3 through the third traction machine unit 33 becomes an airflow AF4 flowing from the second ventilation hole 101 to the outer side in the first direction X. Furthermore, the airflow AF3 through the second traction machine unit 32 flows from the second ventilation hole 101 to the outer side in the first direction X, that is, to the gap between it and the first traction machine unit 31, or to the gap between it and the third traction machine unit 33.

[0035] Additionally, a portion of the airflow AF3 from the first traction machine unit 31 flows from the second ventilation hole 101 to the inside of the first direction X, i.e., to the gap between it and the second traction machine unit 32. Similarly, a portion of the airflow AF3 from the third traction machine unit 33 flows from the second ventilation hole 101 to the inside of the first direction X, i.e., to the gap between it and the second traction machine unit 32.

[0036] The airflow AF6 passing through the gaps between each traction machine unit 31, 32, 33 passes through the radial ventilation hole 103 and flows outward in the radial direction. Then, the airflow AF6 finally flows outward in the radial direction to the outside of the traction machine 1.

[0037] The heat source of the traction machine 1 is the first stator 10A and the first rotor 13A constituting the first motor 14A, and the second stator 10B and the second rotor 13B constituting the second motor 14B. This heat is transferred via contact thermal resistance to the stator frames 7 and 9, which fix the first stator 10A and the second stator 10B, and the rotor support portion 12, which fixes the first rotor 13A and the second rotor 13B. Subsequently, the internal temperature of the stator frames 7 and 9 and the rotor support portion 12 rises due to thermal conduction.

[0038] In this example, the airflows AF1, AF2, and AF3 flowing within the aforementioned traction machine units 31, 32, and 33 can cool the stator frames 7 and 9 and the rotor support 12, and indirectly cool the stators 10A and 10B and the rotors 13A and 13B. Furthermore, the airflow AF6 flowing through the gaps between the traction machine units 31, 32, and 33, i.e., the radial ventilation holes 103, can cool the stator frames 7 and 9 of the second traction machine unit 32, which is located at the center in the first direction X.

[0039] Furthermore, the first ventilation hole 100 and the second ventilation hole 101 provided on each of the traction machine units 31, 32, and 33 are connected. This allows air drawn in by the first traction machine unit 31 and the third traction machine unit 33 to be delivered to the second traction machine unit 32, which is located at the center of the first direction X. As a result, the second traction machine unit 32, located at the center of the first direction X where heat tends to accumulate, can be effectively cooled.

[0040] The multiple traction machine units 31, 32, and 33 having the above structure can be driven to rotate independently. Alternatively, the rotor support portions 12 of the multiple traction machine units 31, 32, and 33 can be connected, allowing the rotor support portions 12 of the multiple traction machine units 31, 32, and 33 to rotate as a whole. Furthermore, the number of traction machine units constituting the traction machine 1 is not limited to three; two or more can be provided.

[0041] 2. Implementation Example 2 Next, refer to Figure 5 The traction machine involved in Embodiment Example 2 will be described. Figure 5 This is a cross-sectional view showing the traction machine according to Embodiment Example 2.

[0042] The difference between the traction machine of Embodiment 2 and the traction machine 1 of Embodiment 1 lies in the structure of the first traction machine unit. The parts common to the traction machine 1 of Embodiment 1 are given the same reference numerals, and repeated descriptions are omitted.

[0043] like Figure 5 As shown, the traction machine 1A includes a main shaft 4 and three traction machine units 31A, 32, and 33. The first traction machine unit 31A is arranged opposite to the wall 300 of the machine room where the traction machine 1A is installed. Furthermore, no first ventilation hole 100 is provided on the first stator frame 7A of the first traction machine unit 31A. Additionally, since the structures of the second traction machine unit 32 and the third traction machine unit 33 are the same as those of the traction machine units 32 and 33 in Embodiment 1, their description will be omitted.

[0044] According to the traction machine 1A of Embodiment Example 2, the first traction machine unit 31A, which is disposed on the side of the wall 300 where heat easily accumulates, can prevent air from being drawn into the wall 300 side. As a result, the cooling efficiency of the traction machine 1A can be improved.

[0045] The other structures are the same as those of the traction machine 1 described in Embodiment Example 1, so these descriptions are omitted. Using the traction machine 1A with the above-described structure, the same effects as those of the traction machine 1 described in Embodiment Example 1 can also be obtained.

[0046] The fan 110 of the third traction machine unit 33, which is located furthest from the wall 300, can be an axial fan. Thus, the fan 110 of the third traction machine unit 33 can effectively deliver air to the first traction machine unit 31 and the second traction machine unit 32 located on the side of the wall 300, thereby improving cooling efficiency.

[0047] 3. Implementation Example 3 Next, refer to Figure 6 The traction machine involved in Embodiment Example 3 will be described. Figure 6 This is a cross-sectional view showing the traction machine according to Embodiment Example 3.

[0048] The traction machine of this embodiment 3 differs from the traction machine 1 of embodiment 1 in the structure of the first traction machine unit and the third traction machine unit. The parts common to the traction machine 1 of embodiment 1 are given the same reference numerals, and repeated descriptions are omitted.

[0049] like Figure 6 As shown, the traction machine 1B includes a main shaft 4 and three traction machine units 31B, 32, and 33B. Since the structure of the second traction machine unit 32 is the same as that of the traction machine unit 32 in Embodiment Example 1, its description will be omitted.

[0050] Furthermore, since the first traction machine unit 31B and the third traction machine unit 33B have the same structure, the first traction machine unit 31B will be described here. The first traction machine unit 31B has a first stator frame 7B, a second stator frame 9B, and a rotor support portion 12B. Ventilation holes 100, shown as air inlets, are formed on the first stator frame 7B and the second stator frame 9B. Rotor-side ventilation holes 104 are formed in the rotor support portion 12B at positions facing the ventilation holes 100.

[0051] Furthermore, a second air supply fan 111 is provided on the rotor support portion 12B. The second air supply fan 111 is provided on the surface of the rotor support portion 12B opposite to the first stator frame 7B and the surface opposite to the second stator frame 9B. The second air supply fan 111 is an axial flow fan that supplies air toward the first direction X. The second air supply fan 111 provided on the first traction machine unit 31B and the third traction machine unit 33B supplies air toward the second traction machine unit 32.

[0052] Therefore, air drawn in from the outside can be effectively delivered into the second traction unit 32, which is located at the stop in the first direction X. As a result, the second traction unit 32, which is prone to heat accumulation and temperature rise, can be effectively cooled.

[0053] The other structures are the same as those of the traction machine 1 described in Embodiment Example 1, so these descriptions are omitted. Even using the traction machine 1B with the above-described structure, the same operating effect as that of the traction machine 1 described in Embodiment Example 1 can be obtained.

[0054] 4. Implementation Example 4 Next, refer to Figure 7 and Figure 8 This describes the traction machine of Implementation Example 4. Figure 7 This is a cross-sectional perspective view of the traction machine according to Embodiment Example 4. Figure 8 This is an explanatory diagram showing the ventilation path of the traction machine according to Embodiment Example 4.

[0055] like Figure 7 and Figure 8 As shown, the traction machine 1C of Embodiment Example 4 includes a first traction machine unit 35, a second traction machine unit 36, a main shaft 4, and a traction sheave 65. The first traction machine unit 35 is disposed at one end of the main shaft 4 in a first direction X, and the second traction machine unit 36 ​​is disposed at the other end of the main shaft 4 in the first direction X. Furthermore, the traction sheave 65 is disposed at the middle of the main shaft 4 in the first direction X and is located between the first traction machine unit 35 and the second traction machine unit 36. In addition, the traction sheave 65 is formed into a hollow cylindrical shape.

[0056] Since the first traction machine unit 35 and the second traction machine unit 36 ​​have the same structure, the first traction machine unit 35 will be described here. The first traction machine unit 35 has a first stator frame 57, a second stator frame 59, and a rotor support portion 62. The first stator frame 57 and the second stator frame 59 are formed in a generally circular plate shape. The first stator frame 57 and the second stator frame 59 are opposite to each other along a first direction X. The first stator frame 57 is disposed on the side of the traction sheave 65 in the first traction machine unit 35, and the second stator frame 59 is disposed on the outer side of the first traction machine unit 35 in the first direction X. The first stator frame 57 faces the internal space 65a of the traction sheave 65.

[0057] The second stator 10B is fixed to the outer radial direction of one surface of the first stator frame 57 opposite to the second stator frame 59. Furthermore, the first stator 10A is fixed to the outer radial direction of one surface of the second stator frame 59 opposite to the first stator frame 57.

[0058] The second stator frame 59 is similarly provided with a shaft portion for inserting the main shaft 4, as in the second stator frame 9 of Embodiment 1. The shaft portion is fixed to the main shaft 4 via a fixing member 5.

[0059] The rotor support 62 is rotatably supported on the shaft of the second stator frame 59 via bearings 11. The first rotor 13A, opposite the first stator 10A, and the second rotor 13B, opposite the second stator 10B, are fixed to the rotor support 62. Furthermore, a traction sheave 65 is disposed on the inner side of the outer edge of the rotor support 62 in the radial direction. The traction sheave 65 is fixed to the outer edge of the rotor support 62 via fixing bolts 50.

[0060] Furthermore, ventilation holes 108 are formed on the first stator frame 57 and the second stator frame 59. The ventilation holes 108 in the first stator frame 57 communicate with the internal space 65a of the traction sheave 65.

[0061] A rotor-side ventilation hole 107 is formed on the rotor support portion 62. The rotor-side ventilation hole 107 connects the internal space of the traction machine unit 35, which is divided by the rotor support portion 62. In addition, a blower fan 112 is provided on the rotor support portion 62. The blower fan 112 is an axial flow fan that delivers air along the first direction X.

[0062] Furthermore, a plurality of radial ventilation holes 109 are formed at the outer edge of the rotor support 62 where it contacts the traction sheave 65. The plurality of radial ventilation holes 109 are formed at intervals along the circumference of the traction sheave 65 and the rotor support 62.

[0063] Next, the cooling operation of the traction machine 1C of Embodiment Example 4, which has the above-described structure, will be explained. like Figure 8As shown, when the rotor support 12 of each traction machine unit 35, 36 of the traction machine 1C rotates, an airflow from the outside to the inside in the first direction X is generated by the fan 112 provided on the rotor support 12. As a result, air flows into each traction machine unit 35, 36 through the ventilation hole 108 provided on the second stator frame 59 of each traction machine unit 35, 36. This airflow is designated as airflow AF1'. Airflow AF1' passes through the rotor-side ventilation hole 107 of the rotor support 62 and flows inward in the first direction X.

[0064] A portion of the airflow AF'1 flows from the ventilation hole 108 of the first stator frame 57 into the internal space 65a formed between the traction sheave 65 and the main shaft 4. This airflow is designated as airflow AF'2. Airflow AF'2 becomes airflow AF'16, which irregularly disrupts the airflow in the internal space 65a due to the rotation of the traction sheave 65. In addition, a portion of airflow AF1' and airflow AF'16 flowing through the internal space 65a are discharged as airflow AF'3 from the radial ventilation hole 109 to the outside of the traction machine 1C.

[0065] According to the traction machine 1C of this embodiment 4, the stators 10A and 10B and rotors 13A and 13B of each traction machine unit 35 and 36 can be cooled by the airflow AF1. Furthermore, the airflow AF'16 flowing into the internal space 65a of the traction sheave 65 can cool the traction sheave 65 and the main shaft 4, and the traction machine units 35 and 36 are cooled via the main shaft 4. Thus, the overall cooling capacity of the traction machine 1C can be improved.

[0066] The other structures are the same as those of the traction machine 1 described in Embodiment Example 1, so these descriptions are omitted. Even using the traction machine 1C with the above-described structure, the same effects as those of the traction machine 1 described in Embodiment Example 1 can be obtained.

[0067] In addition, in Embodiment Example 4, an example of providing radial ventilation holes 109 on the rotor support portion 62 is described, but it is not limited to this, and radial ventilation holes 109 may also be formed on the traction sheave 65.

[0068] 5. Implementation Example 5 Next, refer to Figure 9 The traction machine involved in Embodiment Example 5 will be described. Figure 9 This is a cross-sectional view showing the traction machine according to Embodiment Example 5.

[0069] The traction machine 1D according to Embodiment Example 5 changes the direction of air delivery by the blower fan 112 in the traction machine 1C of Embodiment Example 4. Therefore, the same reference numerals are assigned to the parts common to the traction machine 1C of Embodiment Example 4, and repeated descriptions are omitted.

[0070] like Figure 9 As shown, the fan 112D of the first traction machine unit 35 supplies air to the traction sheave 65 from the outside in the first direction X. In contrast, the fan 112D of the second traction machine unit 36 ​​supplies air to the outside from the traction sheave 65 side in the first direction X. Therefore, the airflow AF'4 flowing in from the outside in the first direction X of the first traction machine unit 35 becomes the airflow AF'7 flowing into the internal space 65a of the traction sheave 65 and the airflow AF'6 flowing outward from the radial ventilation hole 109 provided on the first traction machine unit 35.

[0071] Airflow AF'7 flowing into the internal space 65a of the traction sheave 65 flows toward the second traction machine unit 36 ​​along the first direction X. Then, a portion of the airflow AF'7 becomes airflow AF'9 flowing outward from the radial ventilation hole 109 provided on the second traction machine unit 36. In addition, the air flowing into the second traction machine unit 36 ​​is discharged as airflow AF'10 from the ventilation hole 108 of the second traction machine unit 36 ​​to the outside in the first direction X.

[0072] The other structures are the same as those of the traction machine 1 described in Embodiment 1 and the traction machine 1C described in Embodiment 4, therefore their descriptions will be omitted. The traction machine 1D with such a structure can also achieve the same effects as the traction machine 1 described in Embodiment 1 and the traction machine 1C described in Embodiment 4.

[0073] 6. Implementation Example 6 Next, refer to Figure 10 The traction machine involved in Embodiment Example 6 will be described. Figure 10 This is a cross-sectional view showing the traction machine according to Embodiment Example 6.

[0074] like Figure 10 As shown, the traction machine 1E according to Embodiment 6 has cooling fins 120 and ventilation guides 121 provided in the internal space 65a of the traction sheave 65 of the traction machine 1C according to Embodiment 4. Therefore, the same reference numerals are given to the parts common to the traction machine 1C according to Embodiment 4 and repeated descriptions are omitted.

[0075] Cooling fins 120 are disposed on the main shaft 4 within the internal space 65a of the traction sheave 65. The cooling fins 120 agitate the air flowing through the internal space 65a of the traction sheave 65. Furthermore, the cooling fins 120 form an airflow AF'11 from the internal space 65a of the traction sheave 65 to the second traction machine unit 36.

[0076] A ventilation guide 121 is formed in the traction sheave 65 near the ventilation hole 108 on the traction sheave 65 side of the first traction machine unit 35. Furthermore, the ventilation guide 121 is an inclined surface portion that tilts the axial ends of the traction sheave 65 towards the radial center. Through this ventilation guide 121, the direction of air flowing from the first traction machine unit 35 is directed towards the cooling fins 120 as an airflow AF'8. This increases the airflow to the cooling fins 120 and improves cooling capacity.

[0077] The other structures are the same as those of the traction machine 1 described in Embodiment 1 and the traction machine 1D described in Embodiment 5, therefore their descriptions will be omitted. The traction machine 1E with such a structure can also achieve the same effects as the traction machine 1 described in Embodiment 1 and the traction machine 1D described in Embodiment 5.

[0078] 7. Implementation Example 7 Next, refer to Figure 11 The traction machine involved in Embodiment Example 7 will be described. Figure 11 This is a cross-sectional view showing the traction machine according to Embodiment Example 7.

[0079] The traction machine 1F according to Embodiment Example 7 is obtained by further adding two traction machine units 37 and 38 to the traction machine 1E according to Embodiment Example 6. Therefore, the same reference numerals are assigned to the parts common to the traction machine 1E according to Embodiment Example 6 and repeated descriptions are omitted.

[0080] like Figure 11 As shown, the traction machine 1F has four traction machine units 35, 36, 37, 38, a main shaft 4, and a traction sheave 65. The third traction machine unit 37 is located at one end further in the first direction X than the first traction machine unit 35. The fourth traction machine unit 38 is located at the other end further in the first direction X than the second traction machine unit 36.

[0081] The rotor support portion 62 of the first traction machine unit 35 is coupled to the rotor support portion 62 of the third traction machine unit 37. The rotor support portion 62 of the second traction machine unit 36 ​​is coupled to the rotor support portion 62 of the fourth traction machine unit 38. Furthermore, a radial ventilation hole 109 is formed between the first traction machine unit 35 and the third traction machine unit 37. Also, a radial ventilation hole 109 is formed between the second traction machine unit 36 ​​and the fourth traction machine unit 38.

[0082] In addition, the internal spaces of the first traction machine unit 35 and the third traction machine unit 37 are connected through ventilation holes 108, and the internal spaces of the second traction machine unit 36 ​​and the fourth traction machine unit 38 are connected through ventilation holes 108.

[0083] A portion of the airflow AF'4 flowing in from the ventilation hole 108 of the third traction machine unit 37 flows into the first traction machine unit 35 via the ventilation hole 108. In addition, a portion of the airflow AF'4 is discharged to the outside of the traction machine 1F as airflow AF'12 through the radial ventilation hole 109.

[0084] A portion of the airflow AF'13 flowing from the traction sheave 65 into the second traction machine unit 36 ​​via the ventilation hole 108 flows into the fourth traction machine unit 38. Additionally, a portion of the airflow AF'13 is discharged to the outside of the traction machine 1F as airflow AF'14 through the radial ventilation hole 109. Furthermore, the air flowing into the fourth traction machine unit 38 is discharged to the outside in the first direction X as airflow AF'10 from the ventilation hole 108.

[0085] Therefore, even with an increase in the number of traction machine units, the entire traction machine 1F can be effectively cooled because the internal spaces of each traction machine unit are interconnected.

[0086] The other structures are the same as those of the traction machine 1 described in Embodiment 1 and the traction machine 1E described in Embodiment 6, so their descriptions will be omitted. The traction machine 1F with such a structure can also achieve the same effects as the traction machine 1 described in Embodiment 1 and the traction machine 1E described in Embodiment 6.

[0087] Furthermore, various modifications may be made without departing from the spirit of the invention as described in the claims, and are not limited to the embodiments shown above and in the accompanying drawings.

[0088] Furthermore, the terms “parallel” and “orthogonal” are used in this specification, but they do not only mean strictly “parallel” and “orthogonal”, but also include both “parallel” and “orthogonal”, and can also refer to a state of being roughly “parallel” and roughly “orthogonal” within the range that can perform their functions. Label Explanation 1, 1A, 1B, 1C, 1D, 1E, 1F… Traction machine; 4… Main shaft; 5… Fixed component; 6… Shaft; 7, 9, 57, 59… Stator frame; 10A, 10B… Stator; 11… Bearing; 12, 62… Rotor support; 13A, 13B… Rotor; 14A… First motor; 14B… Second motor; 15, 65… Traction sheave; 18… Mounting recess; 19… Cylinder hole; 31… 32, 33, 35, 36, 37, 38… Traction machine unit, 65a… Internal space, 100… First ventilation hole, 101… Second ventilation hole, 103, 109… Radial ventilation holes, 104, 105, 107… Rotor-side ventilation holes, 108… Ventilation hole, 110, 112… Supply fan, 111… Second supply fan, 112D… Supply fan, 120… Cooling fins, 121… Ventilation guide.

Claims

1. A traction machine, characterized in that, include: spindle; as well as Multiple traction machine units are mounted axially along the main shaft. The traction machine unit includes: A stator frame, wherein a stator is fixed to the stator and has a shaft portion fixed to the main shaft; as well as A rotor support portion, rotatably supported on the shaft portion of the stator frame, and to which a rotor opposite the stator is fixed. Ventilation holes are formed on the traction machine unit to allow air to pass through along the axial direction of the main shaft and to deliver air to other traction machine units. The traction machine has a traction sheave disposed between two traction machine units among the plurality of traction machine units. An internal space is formed between the traction sheave and the main shaft. The ventilation holes of the traction machine unit adjacent to the traction sheave in the plurality of traction machine units are connected to the internal space.

2. The traction machine as described in claim 1, characterized in that, The multiple traction machine units are connected to each other via the ventilation holes.

3. The traction machine as described in claim 1, characterized in that, The ventilation holes are formed on the stator frame.

4. The traction machine as described in claim 1, characterized in that, The ventilation holes are formed on the rotor support.

5. The traction machine as described in claim 1, characterized in that, A fan for supplying air is provided on the rotor support.

6. The traction machine as described in claim 5, characterized in that, The air supply fan is a centrifugal fan that delivers air in a radial direction orthogonal to the axial direction of the main shaft.

7. The traction machine as described in claim 5, characterized in that, The air supply fan is an axial flow fan that delivers air along the axial direction of the main shaft.

8. The traction machine as described in claim 1, characterized in that, Radial passage holes are formed between the plurality of said traction machine units to allow the air to pass through radially in a direction orthogonal to the axis of said main shaft.

9. The traction machine as described in claim 1, characterized in that, A radial passage hole is formed on the traction machine unit and / or the traction sheave to allow the air to pass through radially orthogonal to the axis of the main shaft.

10. An elevator, characterized in that, include: A lifting device that moves up and down in a shaft; The main rope connected to the lifting body; as well as A traction machine that raises and lowers the lifting body by winding the main rope. The traction machine includes: spindle; and Multiple traction machine units are mounted axially along the main shaft. The traction machine unit includes: A stator frame, on which a stator is fixed, and having a shaft portion fixed to the main shaft; and A rotor support portion, rotatably supported on the shaft portion of the stator frame, and to which a rotor opposite the stator is fixed. Ventilation holes are formed on the traction machine unit to allow air to pass through along the axial direction of the main shaft and to deliver air to other traction machine units. The traction machine has a traction sheave disposed between two traction machine units among the plurality of traction machine units. An internal space is formed between the traction sheave and the main shaft. The ventilation holes of the traction machine unit adjacent to the traction sheave in the plurality of traction machine units are connected to the internal space.

Images