Precise air static pressure main shaft

Abstract

The utility model provides a precise air static pressure main shaft which comprises a rotor. The coil sleeves the outer side of the rotor; the front bearing and the rear bearing are arranged at two ends of the rotor and are used for supporting the rotor to rotate; the cylinder barrel sleeves the outer sides of the front bearing and the rear bearing; the outer side of the cylinder barrel is sleeved with the shell; a distance ring, a thrust plate and a spacer are sequentially arranged on the side, away from the front bearing, of the rear bearing. And the distance ring, the thrust plate and the spacer are surrounded by the rear cover. The throttling mesons are arranged in the air holes of the front bearing and the rear bearing, so that the thickness of an air film is effectively stabilized, the stability of the main shaft during rotation is improved, and the rotation precision of the main shaft is further improved; the spiral water tank is designed on the outer wall of the cylinder barrel, and a flow channel structure is formed between the spiral water tank and the shell, so that cooling water can flow in from the water inlet in the rear cover, and is discharged from the water outlet after passing through the flow channel; the influence of thermal deformation is reduced, and the high working precision and lasting stability of the main shaft are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a precision gas static pressure spindle. Background Art

[0002] In the field of precision machinery manufacturing, especially in industries such as high-precision machine tools and precision measuring instruments, the spindle is a core component and its performance directly determines the accuracy and stability of the entire equipment. Traditional rolling bearings or sliding bearings tend to generate greater friction and heat when running at high speeds, leading to thermal deformation and wear problems, thus affecting the working accuracy and life of the spindle.

[0003] Insufficient existing technology:

[0004] 1. If the heat generated by the spindle during high-speed operation is not dissipated promptly and effectively, it will seriously affect the thermal stability of the spindle;

[0005] 2. The sealing between the spindle components is also the key. If the sealing is poor, it will not only cause the lubricating medium to leak, but also allow external impurities to invade and affect the spindle operation;

[0006] 3. Regarding the connection and control methods of structures such as air inlets and outlets, water inlets, and water outlets, the existing design may have problems such as inconvenient operation and easy damage to the interfaces.

[0007] Therefore, the prior art has deficiencies and needs further improvement. Utility Model Content

[0008] In view of the problems existing in the prior art, the utility model provides a precision air static pressure spindle.

[0009] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0010] The utility model provides a precision air static pressure spindle, comprising:

[0011] Rotor;

[0012] The coil is mounted on the outside of the rotor and is used to convert electrical energy into a magnetic field to drive the rotor to rotate;

[0013] The front bearing and the rear bearing are arranged at both ends of the rotor to support the rotation of the rotor;

[0014] The cylinder barrel is sleeved on the outer sides of the front bearing and the rear bearing;

[0015] A housing, which is sleeved on the outer side of the cylinder;

[0016] A distance ring, a thrust plate and a spacer are sequentially arranged on the side of the rear bearing away from the front bearing;

[0017] A rear cover is also installed on the rear bearing, and the rear cover surrounds the distance ring, the thrust plate and the spacer on its inner side;

[0018] The rear cover is provided with an air inlet and an air outlet. The air inlet is connected to the air path arranged in the side wall of the cylinder through a spacer, a thrust plate and a distance ring, and is connected to the air holes on the outer walls of the front bearing and the rear bearing. The gas in the air holes enters between the rotor and the front bearing and the rear bearing to form an air film as a lubricating medium, and is discharged through the air outlet.

[0019] Furthermore, throttling mesons are installed in the air holes of the front bearing and the rear bearing, and the throttling mesons are tubular structures.

[0020] Furthermore, a spiral water groove is provided on the outer wall of the cylinder, and a flow channel is formed between the cylinder and the outer shell. Both ends of the flow channel are respectively connected to the water inlet and the water outlet on the rear cover to form a water flow circuit for cooling.

[0021] Furthermore, a plurality of O-rings for sealing are arranged between the front bearing, the rear bearing and the inner wall of the cylinder.

[0022] Furthermore, a front cover is provided at the front end of the cylinder.

[0023] Furthermore, joints are installed on the air inlet, air outlet, water inlet and water outlet.

[0024] The technical solution of the utility model has the following beneficial effects:

[0025] 1. Precise control of the air film: By installing throttling mesons in the air holes of the front and rear bearings, the tubular structure can accurately adjust the gas flow entering between the spindle and the bearings, thereby effectively stabilizing the thickness of the air film, improving the stability and smoothness of the spindle during rotation, and further improving the rotation accuracy of the spindle.

[0026] 2. High-efficiency cooling system: A spiral water groove is designed on the outer wall of the cylinder, and a flow channel structure is formed between the outer shell, so that cooling water can flow in from the water inlet on the rear cover, pass through the flow channel, and then be discharged from the water outlet; this structure improves the heat dissipation efficiency, ensures that the spindle can maintain a low operating temperature when running at high speed and for a long time, reduces the impact of thermal deformation, and ensures the high precision and long-term stability of the spindle.

[0027] 3. Enhanced sealing performance: Several O-rings are added between the front bearing, rear bearing and the inner wall of the cylinder to enhance the sealing effect and prevent the leakage of clean pressurized air used for lubrication. At the same time, it also prevents the invasion of external impurities, which is essential for maintaining the cleanliness of the spindle and ensuring the normal operation of the air pressure system.

[0028] 4. Optimized structure and convenient maintenance: It is equipped with front and rear covers. The front cover is provided at the front end, and the rear cover is provided with integrated air inlet, air outlet, water inlet and water outlet and with a connector at the rear end. It is not only convenient for assembly and disassembly, but also enhances the compactness and sealing of the overall structure. At the same time, it is convenient for the connection and management of the air and water circuits, which is conducive to the daily maintenance and troubleshooting of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the utility model;

[0030] Figure 2 It is a cross-sectional view of the utility model;

[0031] Figure 3 It is a schematic diagram of the spiral water tank of the utility model after removing the outer shell;

[0032] Figure 4 It is another cross-sectional view of the utility model.

[0033] In the figure:

[0034] 1. Rotor; 2. Coil; 3. Front bearing; 4. Rear bearing;

[0035] 5. Cylinder; 6. Casing;

[0036] 7. Distance ring; 8. Thrust plate; 9. Spacer; 10. Back cover;

[0037] 11. Air inlet; 12. Air outlet;

[0038] 13. Throttling meson;

[0039] 14. Spiral sink;

[0040] 15. Water inlet; 16. Water outlet;

[0041] 17. O-ring;

[0042] 18. Front cover. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "front", "back", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] Combination Figure 1-Figure 4As shown, the utility model provides a precision air static pressure spindle, including: a rotor 1; a coil 2, which is sleeved on the outer side of the rotor 1 and is used to convert electrical energy into a magnetic field to drive the rotor 1 to rotate; a front bearing 3 and a rear bearing 4, which are arranged at both ends of the rotor 1 and are used to support the rotation of the rotor 1; a cylinder 5, which is sleeved on the outer sides of the front bearing 3 and the rear bearing 4; a housing 6, which is sleeved on the outer side of the cylinder 5; a distance ring 7, a thrust plate 8, and a spacer 9 are sequentially arranged on the side of the rear bearing 4 away from the front bearing 3; a rear cover 10 is also installed on the rear bearing 4, and the rear cover 10 The distance ring 7, the thrust plate 8 and the spacer 9 are surrounded on the inner side thereof; the rear cover 10 is provided with an air inlet 11 and an air outlet 12, the air inlet 11 is connected to the air path provided in the side wall of the cylinder 5 through the spacer 9, the thrust plate 8 and the distance ring 7, and is connected to the air holes on the outer walls of the front bearing 3 and the rear bearing 4, the gas in the air holes enters between the rotor 1 and the front bearing 3 and the rear bearing 4 to form an air film as a lubricating medium, and is discharged through the air outlet 12; the air holes of the front bearing 3 and the rear bearing 4 are installed with throttling mesons 13, and the throttling mesons 13 are tubular structures.

[0048] The outer wall of the cylinder 5 is provided with a spiral water groove 14, and a flow channel is formed between the cylinder 5 and the outer shell 6. The two ends of the flow channel are respectively connected to the water inlet 15 and the water outlet 16 on the rear cover 10 to form a water flow circuit for cooling. A plurality of O-rings 17 for sealing are provided between the front bearing 3, the rear bearing 4 and the inner wall of the cylinder 5. A front cover 18 is also provided at the front end of the cylinder 5. Joints are installed on the air inlet 11, the air outlet 12, the water inlet 15, and the water outlet 16.

[0049] The principle of this utility model is as follows:

[0050] The pneumatic static pressure main shaft includes a rotor 1, a front bearing 3, a rear bearing 4, a cylinder 5, a housing 6, and front and rear covers 10 and other components; an annular coil 2 is sleeved on the outer side of the rotor 1, and the front bearing 3 and the rear bearing 4 are respectively arranged at both ends of the rotor 1, the outer sides of the front and rear bearings 4 are sleeved with a cylinder 5, and the outer side of the cylinder 5 is sleeved with a housing 6; the outer side of the rear bearing 4 is sequentially provided with a distance ring 7, a thrust plate 8, a spacer 9, and a rear cover 10.

[0051] The rear cover 10 is installed on the rear bearing 4 and surrounds the distance ring 7, thrust plate 8 and spacer 9 on its inner side; the rear cover 10 is provided with an air inlet 11 and an air outlet 12, and the air inlet 11 is connected to the air path set in the side wall of the cylinder 5 through the spacer 9, thrust plate 8 and distance ring 7, and the air path is further connected to the air holes on the outer walls of the front bearing 3 and the rear bearing 4.

[0052] A throttling meson 13 is installed in the air holes of the front bearing 3 and the rear bearing 4. The throttling meson 13 is a tubular structure that can control the flow of gas and improve the lubrication effect. The gas enters through the air inlet 11, passes through the throttling meson 13, and then enters between the rotor 1 and the front bearing 3 and the rear bearing 4 to form an air film as a lubricating medium, and then is discharged through the air outlet 12.

[0053] The outer wall of the cylinder 5 is provided with a spiral water groove 14, and a flow channel is formed between the cylinder 5 and the outer shell 6. The two ends of the flow channel are respectively connected to the water inlet 15 and the water outlet 16 on the rear cover 10. The running water is used for cooling, thereby effectively controlling the working temperature of the spindle.

[0054] A number of O-rings 17 for sealing are arranged between the front bearing 3, the rear bearing 4 and the inner wall of the cylinder 5, which can effectively prevent the leakage of gas and liquid and improve the working efficiency and safety of the main shaft; a front cover 18 is also arranged at the front end of the cylinder 5, which can further enhance the sealing of the main shaft; joints are installed on the air inlet 11, the air outlet 12, the water inlet 15 and the water outlet 16 for easy connection and installation.

[0055] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the protection scope of the utility model.

Claims

1. A precision air static pressure spindle, It is characterized in that include: Rotor; The coil is mounted on the outside of the rotor and is used to convert electrical energy into a magnetic field to drive the rotor to rotate; The front bearing and the rear bearing are arranged at both ends of the rotor to support the rotation of the rotor; The cylinder barrel is sleeved on the outer sides of the front bearing and the rear bearing; A housing, which is sleeved on the outer side of the cylinder; A distance ring, a thrust plate and a spacer are sequentially arranged on the side of the rear bearing away from the front bearing; A rear cover is also installed on the rear bearing, and the rear cover surrounds the distance ring, the thrust plate and the spacer on its inner side; The rear cover is provided with an air inlet and an air outlet. The air inlet is connected to the air path arranged in the side wall of the cylinder through a spacer, a thrust plate and a distance ring, and is connected to the air holes on the outer walls of the front bearing and the rear bearing. The gas in the air holes enters between the rotor and the front bearing and the rear bearing to form an air film as a lubricating medium, and is discharged through the air outlet.

2. The precision air static pressure spindle according to claim 1, It is characterized in that Throttling mesons are installed in the air holes of the front bearing and the rear bearing, and the throttling mesons are tubular structures.

3. The precision air static pressure spindle according to claim 1, It is characterized in that The outer wall of the cylinder is provided with a spiral water groove, and a flow channel is formed between the cylinder and the outer shell. The two ends of the flow channel are respectively connected to the water inlet and the water outlet on the rear cover to form a water flow loop for cooling.

4. The precision air static pressure spindle according to claim 1, It is characterized in that A plurality of O-rings for sealing are arranged between the front bearing, the rear bearing and the inner wall of the cylinder.

5. The precision air static pressure spindle according to claim 1, It is characterized in that The front end of the cylinder is also provided with a front cover.

6. The precision air static pressure spindle according to claim 3, It is characterized in that The air inlet, the air outlet, the water inlet and the water outlet are all equipped with joints.

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