TW201338362A - Rotating electric machine - Google Patents
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- TW201338362A TW201338362A TW101140133A TW101140133A TW201338362A TW 201338362 A TW201338362 A TW 201338362A TW 101140133 A TW101140133 A TW 101140133A TW 101140133 A TW101140133 A TW 101140133A TW 201338362 A TW201338362 A TW 201338362A
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Abstract
Description
本發明係有關於旋轉電機。 The invention relates to a rotating electrical machine.
以往，作為旋轉電機一例的電動機包括主軸、徑向軸承、推力軸承和機架。徑向軸承在徑向方向支承主軸。推力軸承在推力方向支承主軸。機架借助於徑向軸承和推力軸承對主軸進行支承。 Conventionally, an electric motor as an example of a rotating electrical machine includes a main shaft, a radial bearing, a thrust bearing, and a frame. The radial bearing supports the main shaft in the radial direction. The thrust bearing supports the main shaft in the thrust direction. The frame supports the spindle by means of radial bearings and thrust bearings.
並且，作為這樣的電動機的一例，已知有具有空氣靜壓軸承的主軸電動機。該空氣靜壓軸承通過向軸承間隙供給壓縮空氣而在徑向方向和推力方向非接觸地支承主軸(例如，參照日本特開2001-304259號公報)。該主軸電動機，例如作為用於使工作機械的主軸高速旋轉的電動機而被使用。 Further, as an example of such a motor, a spindle motor having an aerostatic bearing is known. The aerostatic bearing supports the main shaft in a non-contact manner in the radial direction and the thrust direction by supplying compressed air to the bearing gap (for example, refer to Japanese Laid-Open Patent Publication No. 2001-304259). This spindle motor is used, for example, as a motor for rotating a spindle of a machine tool at a high speed.
上述主軸電動機以相當高的速度旋轉。儘管如此，在軸承冷卻方面還有改進餘地。例如，推力軸承的發熱量容易變大。若該發熱量變大，則有可能產生推力軸承的摩擦力變大等由於熱量引起的弊端。其結果，有時主軸電動機的壽命無法滿足所要求的值。 The spindle motor described above rotates at a relatively high speed. Despite this, there is room for improvement in bearing cooling. For example, the heat generated by the thrust bearing tends to become large. If the amount of heat generation is increased, there is a possibility that the frictional force of the thrust bearing becomes large due to heat. As a result, the life of the spindle motor sometimes fails to meet the required value.
實施方式的一方式的目的在於提供具有能夠冷卻的推力軸承的旋轉電機。 An object of one embodiment of the embodiment is to provide a rotary electric machine having a thrust bearing that can be cooled.
實施方式的一方式有關的旋轉電機，包含：主軸；在徑向方向對前述主軸進行支承的徑向軸承；在推力方向對前述主軸進行支承的推力軸承；和借助於前述徑向軸承和推力軸承對前述主軸進行支承的機架；在前述推力軸承形成有使冷卻液流動的冷卻液通路，該冷卻液用於對該推力軸承進行冷卻。 A rotary electric machine according to one aspect of the embodiment includes: a main shaft; a radial bearing that supports the main shaft in a radial direction; a thrust bearing that supports the main shaft in a thrust direction; and a radial bearing and a thrust bearing by means of the foregoing A frame supporting the spindle; a cooling fluid passage for flowing a coolant is formed in the thrust bearing, and the coolant is used to cool the thrust bearing.
根據實施方式的一方式，能夠有效地對推力軸承進行冷卻。由此，能夠將由於發熱引起的弊端防患於未然，以及能夠抑制由於熱量引起的壽命降低。 According to one aspect of the embodiment, the thrust bearing can be effectively cooled. Thereby, it is possible to prevent the disadvantages caused by the heat generation, and it is possible to suppress the decrease in the life due to the heat.
在以下的詳細說明中，出於說明的目的，下面記載許多特定的細節以充分理解所公開的具體實施方式。顯而易見，沒有這些特定的細節的一個或更多的實施方式也能夠實施。在其他實例中，公知的結構和裝置被示意性地顯示以簡化視圖。 In the following detailed description, numerous specific details are set forth It will be apparent that one or more embodiments without these specific details can be implemented. In other instances, well-known structures and devices are shown schematically to simplify the view.
以下，參照附圖對本案的旋轉電機的實施方式詳細地進行說明。以下，將旋轉電機設為主軸電動機進行說明。但是，本發明不限於以下的實施方式中的示例。 Hereinafter, an embodiment of the rotary electric machine of the present invention will be described in detail with reference to the drawings. Hereinafter, the rotary electric machine will be described as a spindle motor. However, the invention is not limited to the examples in the following embodiments.
圖1是顯示作為本實施方式有關的旋轉電機的一例的主軸電動機10的縱截面的說明圖。圖2是顯示主軸電動機10的被放大的主要部分的縱截面的說明圖。此外，主軸電動機10是具有空氣靜壓軸承構造的高速主軸電動機。即，在主軸電動機10中，在主軸(Spindle)和軸承之間設置有微小的軸承間隙(未圖示)。向該軸承間隙供給壓縮空氣。由此，主軸被非接觸支承。 FIG. 1 is an explanatory view showing a longitudinal section of a spindle motor 10 as an example of a rotating electrical machine according to the present embodiment. FIG. 2 is an explanatory view showing a longitudinal section of an enlarged main portion of the spindle motor 10. Further, the spindle motor 10 is a high speed spindle motor having an aerostatic bearing structure. That is, in the spindle motor 10, a minute bearing gap (not shown) is provided between the spindle and the bearing. Compressed air is supplied to the bearing gap. Thereby, the main shaft is supported in a non-contact manner.
如圖1和圖2所示，主軸電動機10包括主軸1、徑向軸承(4及41)及推力軸承(5及6)。徑向軸承在徑向方向支承主軸1。推力軸承在推力方向支承主軸1。 As shown in FIGS. 1 and 2, the spindle motor 10 includes a main shaft 1, radial bearings (4 and 41), and thrust bearings (5 and 6). The radial bearing supports the main shaft 1 in the radial direction. The thrust bearing supports the main shaft 1 in the thrust direction.
並且，主軸電動機10包括筒狀的機架2。該機架2，借助於徑向軸承和推力軸承對主軸1進行支承。 Further, the spindle motor 10 includes a cylindrical frame 2. The frame 2 supports the main shaft 1 by means of a radial bearing and a thrust bearing.
而且，如圖1所示，在機架2的前端側設置有軸承蓋21。另一方面，在機架2的基端側設置有托座22。 Further, as shown in FIG. 1, a bearing cap 21 is provided on the front end side of the frame 2. On the other hand, a bracket 22 is provided on the base end side of the frame 2.
如圖2所示，在軸承蓋21的軸承蓋中央部分，形成有使主軸1插通的插通孔27。該軸承蓋中央部分的壁厚比其他部分薄。軸承蓋21的截面具有與主軸1的前端的縱截面形狀相應的階梯。 As shown in FIG. 2, an insertion hole 27 through which the main shaft 1 is inserted is formed in a central portion of the bearing cap 21 of the bearing cap 21. The central portion of the bearing cap has a thinner wall thickness than the other portions. The cross section of the bearing cap 21 has a step corresponding to the longitudinal sectional shape of the front end of the main shaft 1.
如圖1所示，在機架2內的主軸1的基端側設置有旋轉驅動部3。該旋轉驅動部3包括定子31和轉子32。 As shown in FIG. 1, a rotation driving portion 3 is provided on the proximal end side of the main shaft 1 in the chassis 2. The rotary drive unit 3 includes a stator 31 and a rotor 32.
定子31包括由疊層鐵心形成的定子主體31a和模壓線圈部31b。該模壓線圈部31b，具有在定子主體31a纏繞而成的線圈和對線圈進行模壓的樹脂材料。此外，如圖1所示，在旋轉驅動部3的定子31和機架2之間，設置有 用於對定子31進行冷卻的冷卻套33。主軸電動機10具有，導通到該冷卻套33的水冷用或空氣冷卻用的未圖示的冷卻媒體通路。 The stator 31 includes a stator main body 31a and a molded coil portion 31b formed of a laminated core. The molded coil portion 31b has a coil wound around the stator main body 31a and a resin material that molds the coil. Further, as shown in FIG. 1, between the stator 31 of the rotary drive unit 3 and the chassis 2, there is provided A cooling jacket 33 for cooling the stator 31. The spindle motor 10 has a cooling medium passage (not shown) for water cooling or air cooling that is conducted to the cooling jacket 33.
另一方面，轉子32具有：形成為圓筒狀的轉子主體；和設置於其外周面的磁鐵。轉子32以與主軸1同心的方式安裝於主軸1。轉子32被配置成，與定子31之間設有微小的間隙，並且，與定子31相對向。此外，轉子主體包含疊層鐵心或將鐵等金屬切削而形成的構件。 On the other hand, the rotor 32 has a rotor main body formed in a cylindrical shape, and a magnet provided on the outer peripheral surface thereof. The rotor 32 is attached to the main shaft 1 in a concentric manner with the main shaft 1. The rotor 32 is disposed such that a slight gap is provided between the stator 31 and the stator 31. Further, the rotor main body includes a laminated core or a member formed by cutting a metal such as iron.
對於具有上述那樣的構成的主軸電動機10，若向定子31的模壓線圈部31b供給電流，則定子31的磁極發生變化。由此，轉子32被賦予旋轉力，其結果，主軸1進行旋轉。 When the spindle motor 10 having the above-described configuration is supplied with current to the molded coil portion 31b of the stator 31, the magnetic pole of the stator 31 changes. Thereby, the rotor 32 is given a rotational force, and as a result, the main shaft 1 rotates.
主軸電動機10的主軸1，在其負載側具有推力法蘭部11和縮徑部13。推力法蘭部11具有以主軸1的軸為法線的面。另外，推力法蘭部11的直徑比主軸1的主體(主軸1的比推力法蘭部11靠近基端側的部分)的直徑大。縮徑部13的直徑比主軸1的主體的直徑小。縮徑部13，在主軸1的比推力法蘭部11靠近負載的一側，以與推力法蘭部11相接的方式被設置。推力法蘭部11和縮徑部13，以與主軸1同心的方式被配置，並且與主軸1一起旋轉。 The main shaft 1 of the spindle motor 10 has a thrust flange portion 11 and a reduced diameter portion 13 on its load side. The thrust flange portion 11 has a surface that is normal to the axis of the main shaft 1. Further, the diameter of the thrust flange portion 11 is larger than the diameter of the main body of the main shaft 1 (portion of the main shaft 1 closer to the proximal end side than the thrust flange portion 11). The diameter of the reduced diameter portion 13 is smaller than the diameter of the main body of the main shaft 1. The reduced diameter portion 13 is provided so as to be in contact with the thrust flange portion 11 on the side of the main shaft 1 that is closer to the load than the thrust flange portion 11. The thrust flange portion 11 and the reduced diameter portion 13 are disposed concentrically with the main shaft 1 and rotate together with the main shaft 1.
對於主軸電動機10的軸承，如果根據其配置位置進行區分，則具有支承基端側的基端側軸承和支承前端側的前端側軸承。在主軸1的基端側，設置有使主軸1旋轉的旋轉驅動部3。在主軸1的前端側安裝工具等。因此，主 軸1的前端側成為主軸1的負載側。 The bearing of the spindle motor 10 has a base end side bearing on the support base end side and a front end side bearing on the support front end side, according to the arrangement position. A rotation drive unit 3 that rotates the main shaft 1 is provided on the proximal end side of the main shaft 1. A tool or the like is attached to the front end side of the main shaft 1. Therefore, the Lord The front end side of the shaft 1 serves as the load side of the main shaft 1.
如圖1所示，主軸電動機10的基端側軸承是基端側徑向軸承4。另一方面，主軸電動機10的前端側軸承包括負載側徑向軸承41、第1推力軸承5和第2推力軸承6。 As shown in FIG. 1, the base end side bearing of the spindle motor 10 is a base end side radial bearing 4. On the other hand, the front end side bearing of the spindle motor 10 includes a load side radial bearing 41, a first thrust bearing 5, and a second thrust bearing 6.
對於主軸電動機10的軸承，如果根據其功能進行區分，則具有徑向軸承和推力軸承。徑向軸承在徑向方向支承主軸1。推力軸承在推力方向支承主軸1。 The bearings of the spindle motor 10 have radial bearings and thrust bearings if they are distinguished according to their functions. The radial bearing supports the main shaft 1 in the radial direction. The thrust bearing supports the main shaft 1 in the thrust direction.
如圖1所示，主軸電動機10的徑向軸承包括基端側徑向軸承4和負載側徑向軸承41。另一方面，主軸電動機10的推力軸承，如圖1及圖2所示，包括夾持推力法蘭部11的第1推力軸承5及第2推力軸承6。 As shown in FIG. 1, the radial bearing of the spindle motor 10 includes a base end side radial bearing 4 and a load side radial bearing 41. On the other hand, as shown in FIGS. 1 and 2, the thrust bearing of the spindle motor 10 includes a first thrust bearing 5 and a second thrust bearing 6 that sandwich the thrust flange portion 11.
然而，第1推力軸承5和負載側徑向軸承41形成為一體，作為共用軸承7。即，在共用軸承7中，第1推力軸承5具有與推力法蘭部11抵接的法蘭部。負載側徑向軸承41從該第1推力軸承5向主軸1的基端側延伸。該負載側徑向軸承41具有規定長度的筒狀。 However, the first thrust bearing 5 and the load side radial bearing 41 are integrally formed as a common bearing 7. That is, in the common bearing 7, the first thrust bearing 5 has a flange portion that abuts against the thrust flange portion 11. The load side radial bearing 41 extends from the first thrust bearing 5 toward the proximal end side of the main shaft 1. The load side radial bearing 41 has a cylindrical shape having a predetermined length.
這樣，主軸1的軸承具體地具有3個構件。這些構件是基端側徑向軸承4、第2推力軸承6及共用軸承7。共用軸承7包含一體形成的負載側徑向軸承41和第1推力軸承5。 Thus, the bearing of the main shaft 1 specifically has three members. These members are a proximal end side radial bearing 4, a second thrust bearing 6, and a common bearing 7. The common bearing 7 includes a load side radial bearing 41 and a first thrust bearing 5 which are integrally formed.
如圖2所示，在第1推力軸承5的端面設置有第1推力軸承座51。第1推力軸承座51與主軸1的推力法蘭部11的、朝向旋轉驅動部3側的面抵接。 As shown in FIG. 2, the first thrust bearing housing 51 is provided on the end surface of the first thrust bearing 5. The first thrust bearing housing 51 abuts against a surface of the thrust flange portion 11 of the main shaft 1 that faces the rotation drive unit 3 side.
另一方面，在第2推力軸承6的端面設置有第2推力 軸承座61。第2推力軸承座61與主軸1的推力法蘭部11的朝向負載側的面抵接。此外，如圖2所示，主軸電動機10具有隔板12。隔板12的厚度與推力法蘭部11的厚度相應。隔板12被設置在第1推力軸承5和第2推力軸承6之間。 On the other hand, a second thrust is provided on the end surface of the second thrust bearing 6 Bearing housing 61. The second thrust bearing housing 61 is in contact with the surface of the thrust flange portion 11 of the main shaft 1 facing the load side. Further, as shown in FIG. 2, the spindle motor 10 has a partition 12. The thickness of the partition plate 12 corresponds to the thickness of the thrust flange portion 11. The partition plate 12 is provided between the first thrust bearing 5 and the second thrust bearing 6.
在第2推力軸承6設置有推力軸承用冷卻液通路81。推力軸承用冷卻液通路81是用於使冷卻液流動的流路，該冷卻液用於冷卻第2推力軸承6。 The second thrust bearing 6 is provided with a coolant passage 81 for a thrust bearing. The coolant passage 81 for the thrust bearing is a flow passage for flowing the coolant, and the coolant is used to cool the second thrust bearing 6.
即，如圖1所示，冷卻液通路(主冷卻液通路)8具有冷卻液注入口83。冷卻液通路8，以包圍主軸1的大半部分的方式被設置於機架2。另外，在基端側徑向軸承4及共用軸承7設置有環狀冷卻液通路(徑向軸承用冷卻液通路)81a。該環狀冷卻液通路81a與冷卻液通路8連通。 That is, as shown in FIG. 1, the coolant passage (main coolant passage) 8 has a coolant injection port 83. The coolant passage 8 is provided in the frame 2 so as to surround most of the main shaft 1. Further, the proximal end side radial bearing 4 and the common bearing 7 are provided with an annular coolant passage (cooling fluid passage for radial bearing) 81a. The annular coolant passage 81a communicates with the coolant passage 8.
此外，在主軸1進行高速旋轉的情況下，推力軸承的發熱量變多。因此，對於主軸電動機10的高速化來說，希望對推力軸承進行冷卻。但是，將上述冷卻液通路8延長到推力軸承是困難的。 Further, in the case where the main shaft 1 is rotated at a high speed, the amount of heat generated by the thrust bearing increases. Therefore, in order to increase the speed of the spindle motor 10, it is desirable to cool the thrust bearing. However, it is difficult to extend the above-described coolant passage 8 to the thrust bearing.
因此，在主軸電動機10中，主軸1具有縮徑部13，該縮徑部13具有較小的直徑。而且，第2推力軸承6被配置在推力法蘭部11的縮徑部13側。該第2推力軸承6被加寬與主軸1和縮徑部13之間的直徑差(主軸1的直徑縮小量)相應的量。即，第2推力軸承6具有與直徑較小的縮徑部13相接的加寬部分(第2推力軸承6與縮徑部13相接)。而且，如圖2所示，在該第2推力軸承6的加寬 部分設置有冷卻液通路形成區域62。在該冷卻液通路形成區域62形成有推力軸承用冷卻液通路81。 Therefore, in the spindle motor 10, the main shaft 1 has the reduced diameter portion 13, which has a small diameter. Further, the second thrust bearing 6 is disposed on the reduced diameter portion 13 side of the thrust flange portion 11. The second thrust bearing 6 is widened by an amount corresponding to the diameter difference between the main shaft 1 and the reduced diameter portion 13 (the diameter reduction amount of the main shaft 1). In other words, the second thrust bearing 6 has a widened portion that is in contact with the reduced diameter portion 13 having a small diameter (the second thrust bearing 6 is in contact with the reduced diameter portion 13). Moreover, as shown in FIG. 2, the second thrust bearing 6 is widened. A coolant passage forming region 62 is partially provided. A coolant passage 81 for a thrust bearing is formed in the coolant passage forming region 62.
即，第2推力軸承6與以往的推力軸承相比，被加寬與主軸1的直徑縮小量相應的量。該直徑縮小量，與作為第2推力軸承6的加寬部分的冷卻液通路形成區域62的體積相應。利用該加寬部分，能夠容易地使冷卻液通路8延長到第2推力軸承6。 In other words, the second thrust bearing 6 is wider than the conventional thrust bearing by an amount corresponding to the diameter reduction of the main shaft 1. This diameter reduction amount corresponds to the volume of the coolant passage forming region 62 which is the widened portion of the second thrust bearing 6. With this widened portion, the coolant passage 8 can be easily extended to the second thrust bearing 6.
即，如圖2所示，以與形成於機架2的冷卻液通路8連通的方式設置有延長冷卻液通路80。該延長冷卻液通路80將第1推力軸承5、隔板12及第2推力軸承6貫通。 That is, as shown in FIG. 2, the extended coolant passage 80 is provided so as to communicate with the coolant passage 8 formed in the frame 2. The extended coolant passage 80 penetrates the first thrust bearing 5, the partition plate 12, and the second thrust bearing 6.
在延長冷卻液通路80的終端部設置有環狀的推力軸承用冷卻液通路81。即，延長冷卻液通路80的終端部及其附近部分，以幾乎與冷卻液通路8垂直的方式向主軸1延伸規定長度。而且，在該延長冷卻液通路80的終端部，以包圍主軸1的周圍的方式設置有推力軸承用冷卻液通路81。 An annular thrust bearing coolant passage 81 is provided at the end portion of the extended coolant passage 80. That is, the end portion of the extended coolant passage 80 and its vicinity are extended to the main shaft 1 by a predetermined length so as to be almost perpendicular to the coolant passage 8. Further, a coolant passage 81 for a thrust bearing is provided at a terminal end portion of the extended coolant passage 80 so as to surround the periphery of the main shaft 1.
這樣，與冷卻液通路8連通的推力軸承用冷卻液通路81被設置於冷卻液通路形成區域62。由此，能夠將第2推力軸承6冷卻到希望的溫度。其結果，能夠對包括第1推力軸承5的推力軸承進行冷卻。因此，能夠進一步將主軸電動機10高速化。 Thus, the thrust bearing coolant passage 81 that communicates with the coolant passage 8 is provided in the coolant passage forming region 62. Thereby, the second thrust bearing 6 can be cooled to a desired temperature. As a result, the thrust bearing including the first thrust bearing 5 can be cooled. Therefore, the spindle motor 10 can be further speeded up.
此外，主軸電動機10具有用於抑制冷卻液從推力軸承用冷卻液通路81漏出的密封構件。即，如圖2所示，在軸承蓋21的與第2推力軸承6的冷卻液通路形成區域 62抵接的面形成有2條密封安裝槽25。這些密封安裝槽25以夾著冷卻液通路形成區域62中的推力軸承用冷卻液通路81的方式，且以向推力軸承的圓周方向延伸的方式，形成為環狀。而且，在這些密封安裝槽25安裝有作為密封構件的O型環26。 Further, the spindle motor 10 has a sealing member for suppressing leakage of the coolant from the thrust bearing coolant passage 81. That is, as shown in FIG. 2, the coolant passage forming region of the bearing cover 21 and the second thrust bearing 6 is formed. The 62 abutting surface is formed with two sealed mounting grooves 25. The seal mounting groove 25 is formed in a ring shape so as to extend in the circumferential direction of the thrust bearing so as to sandwich the coolant passage 81 for the thrust bearing in the coolant passage forming region 62. Further, an O-ring 26 as a sealing member is attached to these seal mounting grooves 25.
這樣，主軸電動機10，為了抑制冷卻液漏出使用作為密封構件的O型環26。由此，能夠抑制在推力軸承用冷卻液通路81中流動的冷卻液從第2推力軸承6和軸承蓋21之間漏出的情況。因此，能夠安心地使用主軸電動機10。並且，使用O型環26作為密封構件。因此，能夠以低成本實現密封構件。 Thus, the spindle motor 10 uses the O-ring 26 as a sealing member in order to suppress leakage of the coolant. Thereby, it is possible to suppress leakage of the coolant flowing through the coolant passage 81 for the thrust bearing from between the second thrust bearing 6 and the bearing cap 21. Therefore, the spindle motor 10 can be used with peace of mind. Further, an O-ring 26 is used as the sealing member. Therefore, the sealing member can be realized at low cost.
這樣，主軸電動機10能夠以低成本實現充分的密封狀態。因此，能夠以低成本對容易發熱的推力軸承進行冷卻。 Thus, the spindle motor 10 can achieve a sufficient sealing state at low cost. Therefore, the thrust bearing which is easy to generate heat can be cooled at a low cost.
另外，在主軸電動機10中，在第2推力軸承6的端面設置有第2推力軸承座61。而且，該第2推力軸承座61的前端部(縮徑部13側的部分)與冷卻液通路形成區域62的前端部一起，盡可能地與主軸1的縮徑部13接近。 Further, in the spindle motor 10, the second thrust bearing housing 61 is provided on the end surface of the second thrust bearing 6. Further, the distal end portion (portion on the side of the reduced diameter portion 13) of the second thrust bearing housing 61 is as close as possible to the reduced diameter portion 13 of the main shaft 1 together with the distal end portion of the coolant passage forming region 62.
由此，能夠抑制異物從外部進入主軸電動機10內部等。 Thereby, it is possible to suppress entry of foreign matter into the inside of the spindle motor 10 from the outside.
例如，也有時將主軸電動機10應用於切削工具等。在這種情況下，也有時在主軸1的負載側安裝切削刀具等。在這種情況下，切削作業過程中飛出的切削屑或切削油等異物有可能進入軸承蓋21的插通孔27的內周邊與主 軸1的前端部之間的間隙。但是，在主軸電動機10中，第2推力軸承座61的前端盡可能地與主軸1接近。因此，能夠抑制這些異物進入。 For example, the spindle motor 10 is sometimes applied to a cutting tool or the like. In this case, a cutting tool or the like may be attached to the load side of the main shaft 1 in some cases. In this case, foreign matter such as chips or cutting oil that fly out during the cutting operation may enter the inner periphery of the insertion hole 27 of the bearing cap 21 and the main A gap between the front ends of the shaft 1. However, in the spindle motor 10, the front end of the second thrust bearing housing 61 is as close as possible to the main shaft 1. Therefore, entry of these foreign matter can be suppressed.
並且，第2推力軸承座61的軸承面的寬度幾乎與第1推力軸承座51的軸承面的寬度相同。即，第2推力軸承座61和推力法蘭部11之間的抵接面的面積幾乎與第1推力軸承座51和推力法蘭部11之間的抵接面的面積相等。 Further, the width of the bearing surface of the second thrust bearing housing 61 is almost the same as the width of the bearing surface of the first thrust bearing housing 51. In other words, the area of the abutting surface between the second thrust bearing housing 61 and the thrust flange portion 11 is almost equal to the area of the abutting surface between the first thrust bearing housing 51 and the thrust flange portion 11.
由此，與第2推力軸承座61之間的針對推力法蘭部11的按壓力，幾乎和與第1推力軸承座51之間的針對推力法蘭部11的按壓力相等。因此，第1推力軸承座51及第2推力軸承座61能夠很均衡地對主軸1進行軸支承。 Thereby, the pressing force with respect to the thrust flange portion 11 with respect to the second thrust bearing housing 61 is almost equal to the pressing force with respect to the thrust flange portion 11 between the first thrust bearing housings 51. Therefore, the first thrust bearing housing 51 and the second thrust bearing housing 61 can pivotally support the main shaft 1 in a well-balanced manner.
另外，第2推力軸承座61的包含與推力法蘭部11側相反側的面的部分，被加寬與主軸1的直徑縮小量相應的量。因此，第2推力軸承座61形成為，隨著接近縮徑部13(主軸1)逐漸地變薄。 In addition, the portion of the second thrust bearing housing 61 that includes the surface on the side opposite to the thrust flange portion 11 side is widened by an amount corresponding to the diameter reduction of the main shaft 1. Therefore, the second thrust bearing housing 61 is formed to gradually become thinner as it approaches the reduced diameter portion 13 (the main shaft 1).
利用這樣的構成，如圖2所示，在第2推力軸承座61的與推力法蘭部11抵接的面的面積被保持在規定值的狀態下，可抑制在主軸1的縮徑部13的周圍(階梯部)產生不需要的空間這一情況。由此，可抑制無用的空氣滯留的形成。 With such a configuration, as shown in FIG. 2, the area of the surface of the second thrust bearing housing 61 that abuts against the thrust flange portion 11 is maintained at a predetermined value, and the reduced diameter portion 13 of the main shaft 1 can be suppressed. The surrounding (step) creates an unneeded space. Thereby, formation of useless air retention can be suppressed.
另外，在能夠將第2推力軸承座61的與推力法蘭部11抵接的面的面積保持在規定值的範圍，第2推力軸承座61的前端部盡可能多的部分，與主軸1的縮徑部13的周面盡可能地接近。 In addition, the area of the surface of the second thrust bearing housing 61 that abuts against the thrust flange portion 11 can be maintained within a predetermined value range, and the front end portion of the second thrust bearing housing 61 as much as possible and the main shaft 1 The circumferential surface of the reduced diameter portion 13 is as close as possible.
從而，在第2推力軸承座61中，與主軸1的縮徑部13的周面盡可能地接近的部分變長。因此，可更有效地抑制異物從外部進入主軸電動機10內部。 Therefore, in the second thrust bearing housing 61, the portion close to the circumferential surface of the reduced diameter portion 13 of the main shaft 1 becomes as long as possible. Therefore, foreign matter can be more effectively suppressed from entering the inside of the spindle motor 10 from the outside.
本領域技術人員能夠容易地導出上述實施方式的進一步的效果和變形例。因此，本發明的更寬範圍的方式，不限於以上表述並且描述的特定的詳細內容及代表性的實施方式。因此，本發明的方式，在不脫離由附加的申請專利範圍及其等同物定義的概括性的發明概念的精神或範圍的情況下，能夠進行各種改變。 Further effects and modifications of the above-described embodiments can be easily derived by those skilled in the art. Therefore, the scope of the invention is not limited to the specific details and representative embodiments shown and described. Therefore, various modifications can be made without departing from the spirit and scope of the general inventive concept defined by the appended claims.
以上對附圖和說明書進行了詳細的描述。根據以上說明可以進行各種改變和變形。其並非有意進行全面性的描述或將在此描述的主題限定為所揭示的明確的形式。儘管在此以結構特徵或方法行為的特定用語對主題進行了描述，但是，顯然附加的申請專利範圍中定義的主題沒必要被限定為上述描述的特定的特徵或行為。進而上述所描述的特定的特徵或行為作為實現附加於此的申請專利範圍的實施例構成而揭示。 The drawings and the description are described in detail above. Various changes and modifications can be made in accordance with the above description. It is not intended to be exhaustive or to limit the scope of the invention described herein. Although the subject matter has been described in terms of specific features of structural features or methods, it is apparent that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described. Furthermore, the specific features or acts described above are disclosed as an embodiment of the scope of the patent application.
1‧‧‧主軸 1‧‧‧ spindle
2‧‧‧機架 2‧‧‧Rack
3‧‧‧旋轉驅動部 3‧‧‧Rotary drive department
4‧‧‧徑向軸承 4‧‧‧ radial bearing
5‧‧‧第1推力軸承 5‧‧‧1st thrust bearing
6‧‧‧第2推力軸承 6‧‧‧2nd thrust bearing
7‧‧‧共用軸承 7‧‧‧Shared bearings
8‧‧‧冷卻液通路 8‧‧‧ coolant passage
10‧‧‧主軸電動機 10‧‧‧ spindle motor
11‧‧‧推力法蘭部 11‧‧‧Thrust flange
12‧‧‧隔板 12‧‧‧Baffle
13‧‧‧縮徑部 13‧‧‧Reducing section
21‧‧‧軸承蓋 21‧‧‧ bearing cap
25‧‧‧密封安裝槽 25‧‧‧Seal mounting slot
26‧‧‧O型環 26‧‧‧O-ring
27‧‧‧插通孔 27‧‧‧ inserted through hole
31‧‧‧定子 31‧‧‧ Stator
31a‧‧‧定子主體 31a‧‧‧Standing body
31b‧‧‧模壓線圈部 31b‧‧‧Molded coil part
32‧‧‧轉子 32‧‧‧Rotor
33‧‧‧冷卻套 33‧‧‧ Cooling sleeve
41‧‧‧徑向軸承 41‧‧‧ radial bearings
51‧‧‧第1推力軸承座 51‧‧‧1st thrust bearing
61‧‧‧第2推力軸承座 61‧‧‧2nd thrust bearing housing
62‧‧‧冷卻液通路形成區域 62‧‧‧Cooling channel formation area
80‧‧‧延長冷卻液通路 80‧‧‧Extended coolant passage
81‧‧‧推力軸承用冷卻液通路 81‧‧‧Temperature coolant passage for thrust bearings
81a‧‧‧環狀冷卻液通路 81a‧‧‧Circular coolant passage
83‧‧‧冷卻液注入口 83‧‧‧ coolant injection port
圖1是顯示實施方式有關的旋轉電機的縱截面的說明圖。 Fig. 1 is an explanatory view showing a longitudinal section of a rotary electric machine according to an embodiment.
圖2是顯示該旋轉電機的被放大後的主要部分的縱截面的說明圖。 Fig. 2 is an explanatory view showing a longitudinal section of an enlarged main portion of the rotary electric machine.
1‧‧‧主軸 1‧‧‧ spindle
5‧‧‧第1推力軸承 5‧‧‧1st thrust bearing
6‧‧‧第2推力軸承 6‧‧‧2nd thrust bearing
7‧‧‧共用軸承 7‧‧‧Shared bearings
8‧‧‧冷卻液通路 8‧‧‧ coolant passage
11‧‧‧推力法蘭部 11‧‧‧Thrust flange
12‧‧‧隔板 12‧‧‧Baffle
13‧‧‧縮徑部 13‧‧‧Reducing section
21‧‧‧軸承蓋 21‧‧‧ bearing cap
25‧‧‧密封安裝槽 25‧‧‧Seal mounting slot
26‧‧‧O型環 26‧‧‧O-ring
27‧‧‧插通孔 27‧‧‧ inserted through hole
51‧‧‧第1推力軸承座 51‧‧‧1st thrust bearing
61‧‧‧第2推力軸承座 61‧‧‧2nd thrust bearing housing
62‧‧‧冷卻液通路形成區域 62‧‧‧Cooling channel formation area
80‧‧‧延長冷卻液通路 80‧‧‧Extended coolant passage
81‧‧‧推力軸承用冷卻液通路 81‧‧‧Temperature coolant passage for thrust bearings
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011239601A JP5510429B2 (en) | 2011-10-31 | 2011-10-31 | Rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201338362A true TW201338362A (en) | 2013-09-16 |
| TWI509955B TWI509955B (en) | 2015-11-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| TW101140133A TWI509955B (en) | 2011-10-31 | 2012-10-30 | Rotating motor |
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| JP (1) | JP5510429B2 (en) |
| CN (1) | CN103095048B (en) |
| BR (1) | BR102012027353A2 (en) |
| RU (1) | RU2524380C2 (en) |
| TW (1) | TWI509955B (en) |
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| CN107294277B (en) * | 2017-07-21 | 2024-03-26 | 杭州星冠机械科技有限公司 | Main transmission mechanism of wire drawing machine |
| CN109441955B (en) * | 2018-12-18 | 2024-03-19 | 南京磁谷科技有限公司 | Magnetic bearing seat structure for radiating radial magnetic bearing and thrust magnetic bearing |
| CN110380569B (en) * | 2019-09-12 | 2019-12-20 | 山东天瑞重工有限公司 | Magnetic suspension motor and air blower |
| US11624406B2 (en) * | 2020-03-09 | 2023-04-11 | American Piledriving Equipment, Inc. | Bearing cooling systems and methods for vibratory pile drivers |
| CN113890261B (en) * | 2021-10-27 | 2022-12-23 | 苏州汇川控制技术有限公司 | Direct-drive mechanism and processing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB868632A (en) * | 1959-02-23 | 1961-05-25 | Limit Engineering Group Ltd | Improvements relating to axial air gap dynamo electric machines |
| JPH04290610A (en) * | 1991-03-18 | 1992-10-15 | Toshiba Corp | Support device |
| JP2594070Y2 (en) * | 1993-09-16 | 1999-04-19 | 株式会社安川電機 | Spindle motor cooling device |
| JP3517263B2 (en) * | 1994-02-03 | 2004-04-12 | Ｎｔｎ株式会社 | Hydrostatic gas bearing spindle |
| JPH084766A (en) * | 1994-06-15 | 1996-01-09 | Nikon Corp | Air bearing device |
| JP4210835B2 (en) * | 2002-12-12 | 2009-01-21 | 株式会社安川電機 | Hydrostatic air bearing spindle |
| US20060163962A1 (en) * | 2003-07-04 | 2006-07-27 | Akihiro Shimada | Magnetic bearing device |
| RU2267854C1 (en) * | 2004-10-25 | 2006-01-10 | Общество с ограниченной ответственностью "ЛУКОЙЛ-Западная Сибирь" | Electric engine for electric oil-extractive down-pumps |
| CN200946625Y (en) * | 2006-07-03 | 2007-09-12 | 巩立根 | Sliding thrust bearing string with damping function |
| RU73411U1 (en) * | 2007-11-08 | 2008-05-20 | "Центр Разработки Нефтедобывающего Оборудования (Црно)" | SUBMERSIBLE OIL-FILLED ELECTRIC MOTOR FOR INSTALLING A Borehole CENTRIFUGAL PUMP FOR OIL PRODUCTION |
| CN201371162Y (en) * | 2009-04-13 | 2009-12-30 | 中冶实久建设有限公司 | Lubricating structure of thrust bearing of cold rolling machine |
| JP5687453B2 (en) * | 2010-08-11 | 2015-03-18 | Ntn株式会社 | Hydrostatic gas bearing spindle |
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2011
- 2011-10-31 JP JP2011239601A patent/JP5510429B2/en active Active
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2012
- 2012-10-25 BR BR102012027353A patent/BR102012027353A2/en not_active Application Discontinuation
- 2012-10-30 CN CN201210425777.3A patent/CN103095048B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
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| RU2524380C2 (en) | 2014-07-27 |
| RU2012146340A (en) | 2014-05-27 |
| TWI509955B (en) | 2015-11-21 |
| CN103095048B (en) | 2015-05-27 |
| BR102012027353A2 (en) | 2014-12-02 |
| CN103095048A (en) | 2013-05-08 |
| JP2013099112A (en) | 2013-05-20 |
| JP5510429B2 (en) | 2014-06-04 |
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