Ultrahigh-speed main shaft assembly

Abstract

The utility model provides an ultra-high-speed main shaft assembly, and relates to the technical field of motor main shafts. The device comprises a motor shaft; the air foil radial bearing is mounted at the output end of the motor shaft; the transmission main shaft is connected with the output end of the air foil radial bearing through a coupler; and the rolling bearing is arranged on the transmission main shaft. An air foil radial bearing is mounted on the motor shaft and can support the motor shaft to rotate at an ultrahigh speed; the motor shaft transmits driving force to the transmission main shaft through the coupler, ultra-high-speed and high-precision rotation of the transmission main shaft can be supported by installing the rolling bearing on the transmission main shaft, and ultra-high-speed operation can be achieved only by bearing the light load of the transmission main shaft through the rolling bearing. On the whole, high-power and high-rotating-speed operation can be easily achieved, and the operation precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of motor spindles, in particular to an ultra-high-speed spindle assembly. Background Art

[0002] Existing spindles generally use high-precision rolling bearings for rotation support and are driven by high-speed motors. However, due to the limited load-bearing capacity of rolling bearings, general spindles can only achieve technical indicators of about 10kW and 80,000RPM. Increasing the speed can only limit the power, resulting in the inability to process large parts. Increasing the power can only reduce the speed, causing the spindle to become thick, resulting in the spindle being unable to respond quickly and dynamically, and unable to operate at ultra-high speed and high power.

[0003] Therefore, there is an urgent need for an ultra-high-speed spindle assembly that can easily achieve high-power and high-speed operation and ensure operation accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide an ultra-high-speed spindle assembly, which solves the technical problem that the motor shaft cannot operate at ultra-high speed and high power in the prior art. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides an ultra-high-speed spindle assembly, comprising:

[0007] Motor shaft;

[0008] an air foil radial bearing mounted on an output end of the motor shaft;

[0009] A transmission main shaft connected to an output end of the air foil radial bearing via a coupling;

[0010] A rolling bearing is mounted on the transmission main shaft.

[0011] Preferably, it also includes:

[0012] An air foil thrust bearing is mounted on the motor shaft.

[0013] Preferably, it also includes:

[0014] A thrust plate is mounted on the motor shaft and is contact-disposed between two sets of the air foil thrust bearings.

[0015] Preferably, two groups of the air foil radial bearings are provided, and the two groups of the air foil radial bearings are respectively located at two ends of the motor shaft.

[0016] Preferably, the rolling bearings are provided in two groups, and the two groups of rolling bearings are respectively located at two ends of the transmission main shaft.

[0017] Preferably, the coupling is a flexible coupling.

[0018] In the technical solution provided by the utility model, an air foil radial bearing is installed on the motor shaft, and the air foil radial bearing can support the ultra-high-speed rotation of the motor shaft; the motor shaft transmits the driving force to the transmission main shaft through a coupling, and by installing a rolling bearing on the transmission main shaft, the ultra-high-speed and high-precision rotation of the transmission main shaft can be supported, wherein the rolling bearing only needs to bear a very light load of the transmission main shaft, so ultra-high-speed operation can be achieved. Overall, this application can easily achieve high-power and high-speed operation and ensure operation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the main shaft assembly of the utility model.

[0021] In the figure, 1 is the motor shaft; 2 is the transmission main shaft; 3 is the air foil thrust bearing; 4 is the thrust plate; 5 is the air foil radial bearing; 6 is the rolling bearing; and 7 is the coupling. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0023] refer to Figure 1 The specific embodiment of the utility model provides an ultra-high-speed spindle assembly, including:

[0024] Motor shaft 1;

[0025] An air foil radial bearing 5, the air foil radial bearing 5 is mounted on the output end of the motor shaft 1;

[0026] A transmission main shaft 2, which is connected to the output end of the air foil radial bearing 5 through a coupling 7;

[0027] Rolling bearing 6 , which is mounted on the transmission main shaft 2 .

[0028] The existing spindles generally use high-precision rolling bearings for rotation support and are driven by high-speed motors. However, due to the limited carrying capacity of rolling bearings, the general spindles can only achieve technical indicators of about 10kW and 80,000RPM. Increasing the speed can only limit the power, resulting in the inability to process large parts. Increasing the power can only reduce the speed, resulting in a thick spindle, which makes it impossible for the spindle to respond quickly and dynamically, and cannot operate at ultra-high speed and high power. In this application, an air foil radial bearing 5 is installed on the motor shaft 1, and the air foil radial bearing 5 can support the ultra-high-speed rotation of the motor shaft 1; the motor shaft 1 transmits the driving force to the transmission spindle 2 through the coupling 7, and by installing a rolling bearing 6 on the transmission spindle 2, it can support the ultra-high-speed and high-precision rotation of the transmission spindle 2, wherein the rolling bearing 6 only needs to bear the very light load of the transmission spindle 2, so ultra-high speed operation can be achieved. On the whole, this application can easily achieve high-power and high-speed operation and ensure operation accuracy.

[0029] Further optimization plans also include:

[0030] An air foil thrust bearing 3, the air foil thrust bearing 3 is mounted on the motor shaft 1;

[0031] The thrust plate 4 is mounted on the motor shaft 1 and is contact-arranged between two sets of air foil thrust bearings 3 .

[0032] The thrust plate 4 is fixed to the motor shaft 1 , and the two sets of air foil thrust bearings 3 limit the axial movement of the thrust plate 4 to prevent the axial movement of the motor shaft 1 , thereby ensuring the smooth operation of the motor shaft 1 .

[0033] According to a further optimized solution, two groups of air foil radial bearings 5 ​​are provided, and the two groups of air foil radial bearings 5 ​​are respectively located at two ends of the motor shaft 1 .

[0034] This arrangement helps the motor shaft 1 to rotate smoothly at ultra-high speed as a whole.

[0035] According to a further optimization scheme, two groups of rolling bearings 6 are provided, and the two groups of rolling bearings 6 are respectively located at two ends of the transmission main shaft 2 .

[0036] Such an arrangement helps the motor shaft 1 and the transmission spindle 2 to rotate as a whole at ultra-high speed and high precision.

[0037] To further optimize the solution, coupling 7 adopts a flexible coupling.

[0038] The flexible coupling plays a buffering role in the transmission system, alleviating bearing damage caused by shaft deviation and other reasons; the flexible coupling can also balance the relative movement of the axis and reduce noise and vibration.

[0039] like Figure 1 As shown, the parts from right to left are: air foil thrust bearing 3, thrust plate 4, air foil thrust bearing 3, air foil radial bearing 5, motor (including motor stator (not marked in the figure) and motor shaft 1), air foil radial bearing 5, flexible coupling, transmission main shaft 2, rolling bearing 6, rolling bearing 6. The left and right sets of air foil radial bearings 5 ​​support the ultra-high-speed rotation of the motor shaft 1, the thrust plate 4 is fixed to the motor shaft 1, the left and right sets of air foil thrust bearings 3 limit the axial movement of the thrust plate 4 to prevent the axial movement of the motor shaft 1, the motor converts electrical energy into mechanical energy to drive the motor shaft to rotate and output power to the outside, the flexible coupling is used to connect the motor shaft 1 and the transmission main shaft 2 to output power to the outside, and the left and right sets of rolling bearings 6 support the ultra-high-speed and high-precision rotation of the transmission main shaft 2.

[0040] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. used herein to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An ultra-high-speed spindle assembly, characterized in that: include: Motor shaft (1); An air foil radial bearing (5), the air foil radial bearing (5) being mounted on the output end of the motor shaft (1); A transmission main shaft (2), the transmission main shaft (2) being connected to the output end of the air foil radial bearing (5) via a coupling (7); A rolling bearing (6), wherein the rolling bearing (6) is mounted on the transmission main shaft (2).

2. The ultra-high speed spindle assembly according to claim 1, characterized in that: Also includes: An air foil thrust bearing (3) is mounted on the motor shaft (1).

3. The ultra-high speed spindle assembly according to claim 2, characterized in that: Also includes: A thrust plate (4) is mounted on the motor shaft (1) and is contact-arranged between two sets of the air foil thrust bearings (3).

4. The ultra-high speed spindle assembly according to claim 1, characterized in that: Two groups of the air foil radial bearings (5) are provided, and the two groups of the air foil radial bearings (5) are respectively located at two ends of the motor shaft (1).

5. The ultra-high speed spindle assembly according to claim 1, characterized in that: The rolling bearings (6) are provided in two groups, and the two groups of rolling bearings (6) are respectively located at two ends of the transmission main shaft (2).

6. The ultra-high speed spindle assembly according to claim 1, characterized in that: The coupling (7) is a flexible coupling.

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