CN103306995B - A kind of spline tooth pull bar combined rotor high speed direct-drive compressor structure - Google Patents
A kind of spline tooth pull bar combined rotor high speed direct-drive compressor structure Download PDFInfo
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Abstract
一种花键齿拉杆组合转子高速直驱压缩机结构，高速电机连接在花键齿拉杆一端，花键齿拉杆嵌套在两个对称安装的叶轮内，两个叶轮之间设有空心轴，花键齿拉杆另一端通过锁紧螺母压紧在叶轮上，叶轮的外侧依次设有扩压器和蜗壳，其背部设有密封环，空心轴上安装有弹性箔片气体径向轴承，空心轴的推力盘两侧上安装有弹性箔片气体推力轴承，支撑弹性箔片气体径向轴承和弹性箔片气体推力轴承外侧固定的设有外壳，外壳上设有给弹性箔片气体径向轴承、弹性箔片气体推力轴承供气的通孔，达起飞转速后，转子克服弹性箔片气体径向轴承和弹性箔片气体推力轴承的摩擦扭矩起飞，叶轮吸入气体并从扩压器和蜗壳中排除，具有振幅小，结构紧凑，运行平稳的特点。
A high-speed direct-drive compressor structure with a spline tooth tie rod combined rotor. The high speed motor is connected to one end of the spline tooth tie rod. The spline tooth tie rod is nested in two symmetrically installed impellers. A hollow shaft is arranged between the two impellers. The other end of the key tooth pull rod is pressed on the impeller through a lock nut. The outer side of the impeller is provided with a diffuser and a volute in turn, and a sealing ring is provided on the back of the impeller. An elastic foil gas radial bearing is installed on the hollow shaft. Elastic foil gas thrust bearings are installed on both sides of the thrust plate, supporting the elastic foil gas radial bearing and the outside of the elastic foil gas thrust bearing is fixed with a shell, and the shell is provided with elastic foil gas radial bearings, The air supply through hole of the elastic foil gas thrust bearing, after reaching the take-off speed, the rotor overcomes the frictional torque of the elastic foil gas radial bearing and the elastic foil gas thrust bearing and takes off, the impeller sucks the gas and discharges it from the diffuser and the volute It has the characteristics of small amplitude, compact structure and stable operation.
Description
技术领域 technical field
本发明属于高速旋转机械技术领域，特别涉及一种花键齿拉杆组合转子高速直驱压缩机结构。 The invention belongs to the technical field of high-speed rotating machinery, and in particular relates to a structure of a high-speed direct-drive compressor with a spline tooth pull rod combined rotor.
背景技术 Background technique
高速直驱压缩机在广泛应用于各种旋转机械中，由于转速高，所以压缩机的功率密度高，而体积远小于同等功率的普通压缩机，可以有效的节约材料。加上它与原动机相连，取消了传统的增速机构，传动效率高，噪音小。但是由于高速旋转机械所带来的一系列轴系动力学及轴承问题，制约了进一步的提高转速。合理的轴系布局结构直接影响了其动力学性能。采用直驱是目前的主流方式，但是由于直驱的联轴器问题不能很好解决，目前的轴系还存在着轴系对中不好导致的振动过大的问题。 High-speed direct-drive compressors are widely used in various rotating machinery. Due to the high speed, the power density of the compressor is high, and the volume is much smaller than that of ordinary compressors of the same power, which can effectively save materials. In addition, it is connected with the prime mover, canceling the traditional speed-increasing mechanism, with high transmission efficiency and low noise. However, due to a series of shafting dynamics and bearing problems brought about by high-speed rotating machinery, further increase in speed is restricted. Reasonable shafting layout directly affects its dynamic performance. The use of direct drive is the current mainstream method, but because the direct drive coupling problem cannot be solved well, the current shaft system still has the problem of excessive vibration caused by poor shaft alignment.
发明内容 Contents of the invention
为了克服上述现有技术的不足，本发明的目的在于提供了一种花键齿拉杆组合转子高速直驱压缩机结构，具有振幅小，结构紧凑，运行平稳的特点。 In order to overcome the disadvantages of the above-mentioned prior art, the object of the present invention is to provide a high-speed direct-drive compressor structure with a spline tooth tie rod combined rotor, which has the characteristics of small amplitude, compact structure and stable operation.
为了实现上述目的，本发明采用的技术方案是： In order to achieve the above object, the technical scheme adopted in the present invention is:
一种花键齿拉杆组合转子高速直驱压缩机结构，包括高速电机1，高速电机1输出轴端设有的内花键齿12嵌套连接在花键齿拉杆2的一端设有的外花键齿13上，花键齿拉杆2为细长拉杆，其上的两处第一轴颈15分别嵌套在两个对称安装的叶轮3的第一通孔18内，两个叶轮3之间设有空心轴4，两个叶轮3的凸台19都嵌套在空心轴4的第二通孔20内，花键齿拉杆2靠近内花键齿12的一端设有轴肩14，轴肩14紧贴在叶轮3的平台17上，花键齿拉杆2的另外一端设有外螺纹16，通过锁紧螺母5压紧在叶轮3的平台17上，叶轮3的外侧依次设有扩压器9和蜗壳10，其背部设有密封环8，密封环8的内部嵌套在空心轴4的两端最外侧的两处第三轴颈23上，空心轴4的两端的中心部位设有第二轴颈21，第二轴颈21上安装有弹性箔片气体径向轴承6，空心轴4的一端在第二轴颈21和第三轴颈23之间设有推力盘22，推力盘22的两侧上安装有弹性箔片气体推力轴承7，支撑弹性箔片气体径向轴承6和弹性箔片气体推力轴承7外侧固定的设有外壳11，弹性箔片气体径向轴承6的第一轴承座28嵌套在外壳11两端的第一内圆柱面35上，弹性箔片气体推力轴承7的第二轴承座31嵌套在外壳11的第二内圆柱面36上，外壳11上设有给弹性箔片气体径向轴承6供气的第四通孔33，以及给弹性箔片气体推力轴承7供气的第五通孔34。 A spline teeth pull rod combined rotor high-speed direct drive compressor structure, including a high-speed motor 1, the inner spline teeth 12 provided at the output shaft end of the high-speed motor 1 are nested and connected to the outer spline provided at one end of the spline tooth pull rod 2 On the tooth 13, the spline tooth pull rod 2 is a slender pull rod, and the two first journals 15 on it are respectively nested in the first through holes 18 of the two symmetrically installed impellers 3, and the two impellers 3 are provided with There is a hollow shaft 4, the bosses 19 of the two impellers 3 are all nested in the second through hole 20 of the hollow shaft 4, and the end of the spline tooth pull rod 2 close to the inner spline tooth 12 is provided with a shaft shoulder 14, and the shaft shoulder 14 Closely attached to the platform 17 of the impeller 3, the other end of the spline tooth tie rod 2 is provided with an external thread 16, which is pressed on the platform 17 of the impeller 3 by the lock nut 5, and the outer side of the impeller 3 is provided with a diffuser 9 in turn And the volute 10, the back is provided with a seal ring 8, the inside of the seal ring 8 is nested on the two outermost third journals 23 at both ends of the hollow shaft 4, and the center of the two ends of the hollow shaft 4 is provided with a second Two journals 21, an elastic foil gas radial bearing 6 is installed on the second journal 21, and one end of the hollow shaft 4 is provided with a thrust disc 22 between the second journal 21 and the third journal 23, the thrust disc 22 Elastic foil gas thrust bearings 7 are installed on both sides of the two sides, supporting the elastic foil gas radial bearings 6 and the outside of the elastic foil gas thrust bearings 7 are fixed with a housing 11, the first elastic foil gas radial bearings 6 The bearing seat 28 is nested on the first inner cylindrical surface 35 at both ends of the shell 11, the second bearing seat 31 of the elastic foil gas thrust bearing 7 is nested on the second inner cylindrical surface 36 of the shell 11, and the shell 11 is provided with The fourth through hole 33 for supplying gas to the elastic foil gas radial bearing 6 and the fifth through hole 34 for supplying gas to the elastic foil gas thrust bearing 7 .
弹性箔片气体径向轴承6设有压在螺钉24上的垫片25，垫片25固定 第一底层拱箔26，第一底层拱箔26覆盖在第一顶层箔片27上，第一轴承座28支撑第一底层拱箔26和第一顶层箔片27。 The elastic foil gas radial bearing 6 is provided with a gasket 25 pressed on the screw 24, the gasket 25 fixes the first bottom arch foil 26, the first bottom arch foil 26 covers the first top layer foil 27, and the first bearing The seat 28 supports the first bottom arch foil 26 and the first top foil 27 .
弹性箔片气体推力轴承7设有第二顶层箔片29，第二底层拱箔30安装在第二顶层箔片29下，第二轴承座31支撑第二顶层箔片29和第二底层拱箔30，第二轴承座31上设有给弹性箔片气体推力轴承7供气的第三通孔32。 The elastic foil gas thrust bearing 7 is provided with a second top layer foil 29, a second bottom layer arch foil 30 is installed under the second top layer foil 29, and a second bearing seat 31 supports the second top layer foil 29 and the second bottom layer arch foil 30. The second bearing seat 31 is provided with a third through hole 32 for supplying gas to the elastic foil gas thrust bearing 7 .
所述的高速电机1的工作转速为30000～140000rev/min，功率为10～300kW。 The working speed of the high-speed motor 1 is 30000-140000 rev/min, and the power is 10-300 kW.
所述的外花键齿13，其直径为6～14mm，配合间隙0.1mm。 The external spline teeth 13 have a diameter of 6-14mm and a matching clearance of 0.1mm.
所述的外螺纹16，其公称直径为M6～M10mm。 The external thread 16 has a nominal diameter of M6-M10mm.
所述的弹性箔片气体推力轴承7的第三通孔32的个数为4～12个。 The number of the third through holes 32 of the elastic foil gas thrust bearing 7 is 4-12.
所述的外壳11包含有周向均布的第四通孔33和轴向均布的第五通孔34，个数均为4～12个。 The housing 11 includes fourth through holes 33 uniformly distributed in the circumferential direction and fifth through holes 34 uniformly distributed in the axial direction, the number of which is 4-12.
由于本发明是高速电机1、高速电机1内嵌套的花键齿拉杆2、安装在花键齿拉杆2中的两个叶轮3、叶轮3之间的空心轴4、锁紧花键齿拉杆2和叶轮3的锁紧螺母5、安装在空心轴4上的弹性箔片气体径向轴承6和弹性箔片气体推力轴承7、密封叶轮3的密封环8、叶轮3外侧的扩压器9和蜗壳10、弹性箔片气体径向轴承6和弹性箔片气体推力轴承7外侧固定的外壳11所组成的花键齿拉杆组合转子高速直驱压缩机结构，其具 有以下优点：振幅小，结构紧凑，运行平稳的特点。 Because the present invention is a high-speed motor 1, a spline tooth pull rod 2 nested in the high-speed motor 1, two impellers 3 installed in the spline tooth pull rod 2, a hollow shaft 4 between the impellers 3, and a locking spline tooth pull rod 2 and the lock nut 5 of the impeller 3, the elastic foil gas radial bearing 6 and the elastic foil gas thrust bearing 7 installed on the hollow shaft 4, the sealing ring 8 for sealing the impeller 3, the diffuser 9 outside the impeller 3 The structure of the spline teeth pull rod combined rotor high-speed direct-drive compressor composed of the volute 10, the elastic foil gas radial bearing 6 and the outer fixed shell 11 of the elastic foil gas thrust bearing 7 has the following advantages: small amplitude , compact structure and smooth operation.
第一，振幅小：振动幅值是危害高速压缩机安全运行的首要因素。本发明的高速电机的内花键齿同花键齿拉杆的外花键齿通过花键齿连接，直接驱动中可以明显起到联轴器的作用，消除高速电机转子同花键齿拉杆组合转子的不对中所引起的振幅过高问题，能保证花键齿拉杆组合转子的安全稳定运行。 First, the amplitude is small: the amplitude of vibration is the primary factor that endangers the safe operation of high-speed compressors. The inner spline teeth of the high-speed motor of the present invention are connected with the outer spline teeth of the spline tooth pull rod through the spline teeth, which can obviously play the role of a coupling in the direct drive, eliminating the need to combine the rotor of the high-speed motor with the spline tooth pull rod The problem of high vibration amplitude caused by the misalignment can ensure the safe and stable operation of the spline tooth tie rod combination rotor.
第二，结构紧凑：与传统的高速压缩机结构相比，采用直驱结构，在高速条件下仅采用花键齿拉杆、空心轴和叶轮组成的花键齿拉杆组合转子结构紧凑，简单易用，拆卸方便。 Second, the structure is compact: compared with the traditional high-speed compressor structure, it adopts a direct-drive structure. Under high-speed conditions, only the spline-tooth tie-rod combination rotor composed of a spline-tooth tie-rod, a hollow shaft and an impeller is compact and easy to use. , easy to disassemble.
第三，运行平稳：由于本发明采用的花键齿拉杆同空心轴的同心安装并且采用弹性箔片气体径向轴承支承，使得花键齿拉杆组合转子的高速运行下能很好的吸收振动能量，保证其稳定运行。 Third, stable operation: the concentric installation of the spline tooth pull rod and the hollow shaft and the use of elastic foil gas radial bearings in the present invention make the spline tooth pull rod combined rotor can absorb vibration energy well under high-speed operation , to ensure its stable operation.
附图说明 Description of drawings
图1为本发明的整体结构图。 Fig. 1 is the overall structure diagram of the present invention.
图2为图1的A-A截面剖视图。 Fig. 2 is a sectional view of A-A section in Fig. 1 .
图3为本发明花键齿拉杆2的剖视图。 FIG. 3 is a cross-sectional view of the spline tooth tie rod 2 of the present invention.
图4为本发明叶轮3的主视图。 Fig. 4 is a front view of the impeller 3 of the present invention.
图5为本发明空心轴4的主视图。 FIG. 5 is a front view of the hollow shaft 4 of the present invention.
图6为本发明弹性箔片气体径向轴承6的剖视图及局部放大图，其中 图6(a)为弹性箔片气体径向轴承6的剖视图，6(b)为弹性箔片气体径向轴承6的局部放大图。 Fig. 6 is a cross-sectional view and a partial enlarged view of the elastic foil gas radial bearing 6 of the present invention, wherein Fig. 6 (a) is a cross-sectional view of the elastic foil gas radial bearing 6, and 6 (b) is an elastic foil gas radial bearing 6 is a partial enlarged view.
图7为本发明弹性箔片气体推力轴承7的主视图、剖视图及局部放大图，其中图7(a)为弹性箔片气体推力轴承7的主视图，7(b)为弹性箔片气体推力轴承7的剖视图，7(c)为弹性箔片气体推力轴承7的局部放大图。 Fig. 7 is the front view, cross-sectional view and partial enlarged view of the elastic foil gas thrust bearing 7 of the present invention, wherein Fig. 7 (a) is the front view of the elastic foil gas thrust bearing 7, and 7 (b) is the elastic foil gas thrust A cross-sectional view of the bearing 7, 7(c) is a partial enlarged view of the elastic foil gas thrust bearing 7.
图8为外壳11的剖视图。 FIG. 8 is a cross-sectional view of the housing 11 .
具体实施方式 Detailed ways
下面结合附图对本发明的结构原理和工作原理作进一步详细说明。 The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
参见图1至图8，一种花键齿拉杆组合转子高速直驱压缩机结构，包括高速电机1，高速电机1的输出轴端设有的内花键齿12嵌套连接在花键齿拉杆2一端设有的外花键齿13上，花键齿拉杆2为细长拉杆，其上的两处第一轴颈15分别嵌套在两个对称安装的叶轮3的第一通孔18内，两个叶轮3之间设有空心轴4，两个叶轮3的凸台19都嵌套在空心轴4的第二通孔20内，花键齿拉杆2靠近内花键齿12的一端设有轴肩14，轴肩14紧贴在叶轮3的平台17上，花键齿拉杆2的另外一端设有外螺纹16，通过锁紧螺母5压紧在叶轮3的平台17上，叶轮3的外侧依次设有扩压器9和蜗壳10，其背部设有密封环8，密封环8的内部嵌套在空心轴4的两端最外侧的两处第三轴颈23上，空心轴4的两端的中心部位设有第二轴颈21，第二轴颈21上安装有弹性箔片气体径向轴承6，空心轴4的一 端在第二轴颈21和第三轴颈23之间设有推力盘22，推力盘22的两侧上安装有弹性箔片气体推力轴承7。 Referring to Fig. 1 to Fig. 8, a structure of a high-speed direct-drive compressor with spline teeth and pull rods combined rotors includes a high-speed motor 1, and the inner spline teeth 12 provided on the output shaft end of the high-speed motor 1 are nested and connected to the spline teeth pull rod 2 On the outer spline tooth 13 provided at one end, the spline tooth pull rod 2 is a slender pull rod, and the two first journals 15 on it are respectively nested in the first through holes 18 of the two symmetrically installed impellers 3, A hollow shaft 4 is provided between the two impellers 3, the bosses 19 of the two impellers 3 are nested in the second through hole 20 of the hollow shaft 4, and the end of the spline tooth pull rod 2 near the inner spline tooth 12 is provided with a The shaft shoulder 14, the shaft shoulder 14 is close to the platform 17 of the impeller 3, the other end of the spline gear rod 2 is provided with an external thread 16, which is pressed on the platform 17 of the impeller 3 by the lock nut 5, the outer side of the impeller 3 A diffuser 9 and a volute 10 are provided in sequence, and a seal ring 8 is provided on the back thereof, and the inside of the seal ring 8 is nested on the two outermost third journals 23 at both ends of the hollow shaft 4 , and the hollow shaft 4 The center of both ends is provided with a second journal 21, and an elastic foil gas radial bearing 6 is installed on the second journal 21. One end of the hollow shaft 4 is provided between the second journal 21 and the third journal 23. There is a thrust disc 22, and elastic foil gas thrust bearings 7 are installed on both sides of the thrust disc 22.
参见图1和图6，弹性箔片气体径向轴承6设有压在螺钉24上的垫片25，垫片25固定第一底层拱箔26，第一底层拱箔26覆盖在第一顶层箔片27上，第一轴承座28支撑第一底层拱箔26和第一顶层箔片27。 1 and 6, the elastic foil gas radial bearing 6 is provided with a washer 25 pressed on the screw 24, the washer 25 fixes the first bottom arch foil 26, and the first bottom arch foil 26 is covered on the first top foil On sheet 27 , a first bearing seat 28 supports a first bottom arch foil 26 and a first top foil 27 .
参见图1和图7，弹性箔片气体推力轴承7设有第二顶层箔片29，第二底层拱箔30安装在第二顶层箔片29下，第二轴承座31支撑第二顶层箔片29和第二底层拱箔30，第二轴承座31上设有给弹性箔片气体推力轴承7供气的第三通孔32。 1 and 7, the elastic foil gas thrust bearing 7 is provided with a second top foil 29, a second bottom arch foil 30 is installed under the second top foil 29, and a second bearing seat 31 supports the second top foil 29 and the second bottom arch foil 30, the second bearing seat 31 is provided with a third through hole 32 for supplying gas to the elastic foil gas thrust bearing 7.
参见图1、图6、图7和图8，支撑弹性箔片气体径向轴承6和弹性箔片气体推力轴承7外侧固定的设有外壳11，弹性箔片气体径向轴承6的第一轴承座28嵌套在外壳11两端的第一内圆柱面35上，弹性箔片气体推力轴承7的第二轴承座31嵌套在外壳11的第二内圆柱面36上，外壳11上设有给弹性箔片气体径向轴承6供气的第四通孔33，以及给弹性箔片气体推力轴承7供气的第五通孔34。 Referring to Fig. 1, Fig. 6, Fig. 7 and Fig. 8, a housing 11 is fixed on the outer side of the elastic foil gas radial bearing 6 and the elastic foil gas thrust bearing 7, and the first bearing of the elastic foil gas radial bearing 6 The seat 28 is nested on the first inner cylindrical surface 35 at both ends of the shell 11, the second bearing seat 31 of the elastic foil gas thrust bearing 7 is nested on the second inner cylindrical surface 36 of the shell 11, and the shell 11 is provided with a The fourth through hole 33 for supplying gas to the elastic foil gas radial bearing 6 and the fifth through hole 34 for supplying gas to the elastic foil gas thrust bearing 7 .
所述的高速电机1的工作转速为30000～140000rev/min，功率为10～300kW。 The working speed of the high-speed motor 1 is 30000-140000 rev/min, and the power is 10-300 kW.
所述的外花键齿13，其直径为6～14mm，配合间隙0.1mm。 The external spline teeth 13 have a diameter of 6-14mm and a matching clearance of 0.1mm.
所述的外螺纹16，其公称直径为M6～M10mm。 The external thread 16 has a nominal diameter of M6-M10mm.
所述的弹性箔片气体推力轴承7的第三通孔32的个数为4～12个。 The number of the third through holes 32 of the elastic foil gas thrust bearing 7 is 4-12.
所述的外壳11包含有周向均布的第四通孔33和轴向均布的第五通孔34，个数均为4～12个。 The housing 11 includes fourth through holes 33 uniformly distributed in the circumferential direction and fifth through holes 34 uniformly distributed in the axial direction, the number of which is 4-12.
本发明的工作原理： Working principle of the present invention:
启动高速电机1，高速电机1的内花键齿12嵌套在外花键齿13上，带动由花键齿拉杆2、两个叶轮3、空心轴4和锁紧螺母5组成的转子转动。到达起飞转速前，空心轴4的第二轴颈21和弹性箔片气体径向轴承6的第一顶层箔片27贴合，空心轴4的推力盘22和弹性箔片气体推力轴承7的第二顶层箔片29贴合，待到达起飞转速后，转子克服了弹性箔片气体径向轴承6和弹性箔片气体推力轴承7的摩擦扭矩和起飞，从而使得第二轴颈21和第一顶层箔片27脱离，推力盘22和第二顶层箔片29脱离，弹性箔片气体径向轴承6和弹性箔片气体推力轴承7均开始正常工作，叶轮3吸入气体并从扩压器9和蜗壳10中排除，完成输送压缩气体的过程。 Start the high-speed motor 1, the inner spline teeth 12 of the high-speed motor 1 are nested on the outer spline teeth 13, and drive the rotor consisting of the spline teeth pull rod 2, two impellers 3, the hollow shaft 4 and the lock nut 5 to rotate. Before reaching the take-off rotational speed, the second journal 21 of the hollow shaft 4 is attached to the first top layer foil 27 of the elastic foil gas radial bearing 6, and the thrust plate 22 of the hollow shaft 4 is connected to the first top layer foil 27 of the elastic foil gas thrust bearing 7. The two top-layer foils 29 are bonded together. After reaching the take-off speed, the rotor overcomes the frictional torque and take-off of the elastic foil gas radial bearing 6 and the elastic foil gas thrust bearing 7, so that the second journal 21 and the first top layer The foil 27 is separated, the thrust disc 22 and the second top layer foil 29 are separated, the elastic foil gas radial bearing 6 and the elastic foil gas thrust bearing 7 all start to work normally, and the impeller 3 sucks gas from the diffuser 9 and the scroll Shell 10 is excluded to complete the process of delivering compressed gas.
Claims (8)
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| CN106089791B (en) * | 2016-08-10 | 2020-01-21 | 石家庄金士顿轴承科技有限公司 | Automobile purification pump module supported by foil dynamic pressure air bearing |
| CN111365285B (en) * | 2018-12-25 | 2025-10-17 | 珠海格力电器股份有限公司 | Compressor, refrigerant circulation system and refrigeration equipment |
| CN111365255B (en) * | 2018-12-25 | 2025-03-28 | 珠海格力电器股份有限公司 | Compressor and refrigerant circulation system |
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| CN111486107B (en) * | 2019-01-29 | 2022-01-04 | 青岛海尔智能技术研发有限公司 | Centrifugal compressor and heat pump system |
| CN110030269A (en) * | 2019-04-24 | 2019-07-19 | 上海捷氢科技有限公司 | Elastic foil gas bearing and elastic foil gas bearing friction are secondary |
| CN110374892A (en) * | 2019-07-09 | 2019-10-25 | 中国航发哈尔滨东安发动机有限公司 | A kind of centrifugal two-stage air compressor of high-speed direct-drive |
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| CN112377267B (en) * | 2020-11-30 | 2024-02-20 | 中国电子科技集团公司第十六研究所 | Self-cooling high-speed ram air turbine generator |
| CN113266596A (en) * | 2021-06-02 | 2021-08-17 | 北京智拓博科技有限公司 | Pneumatic suspension centrifugal refrigeration compressor and axial bearing structure thereof |
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