Air floatation main shaft with air path structure

Abstract

The invention discloses an air floating main shaft with an air path structure, and belongs to the technical field of thinning machines. The air floating main shaft with the air path structure comprises a core shaft, a shaft body assembly and the air path structure, the core shaft can rotate around the Z axis relative to the shaft body assembly; the gas circuit structure comprises a gas inlet pipeline and a first gas film area, the gas inlet pipeline is arranged on the shaft body assembly, the first gas film area is formed in the radial direction of the mandrel and in a gap between the mandrel and the shaft body assembly, and the gas inlet pipeline is used for filling gas into the first gas film area so that a first gas film can be formed in the first gas film area; the first air film is used for supporting the mandrel in the radial direction of the mandrel in an air floating mode. According to the air floating main shaft with the air path structure, the air inlet pipeline and the first air film area which are matched with each other are arranged, so that a first air film is formed in a gap between the core shaft and the shaft body assembly, and non-contact supporting between the core shaft and the shaft body assembly is achieved; in this way, it can be guaranteed that contact friction cannot be generated between the core shaft and the shaft body assembly in the high-speed rotating process of the core shaft, and therefore the core shaft can be well protected.

Description

Technical Field

[0001] The invention relates to the technical field of thinning machines, and in particular to an air-floating spindle with an air path structure. Background Art

[0002] The air bearing spindle is a high-precision processing structure, and its precision and stability have an important impact on the processing quality. The air bearing spindle has become a key part in the thinning machine due to its high speed and high precision. Among them, the air bearing spindle mainly includes a mandrel and a shaft assembly, and the mandrel can rotate relative to the shaft assembly.

[0003] However, since the mandrel will generate contact friction with the shaft assembly during high-speed rotation, the mandrel will be severely worn and need to be replaced frequently, which is costly and affects the working efficiency of the thinning machine.

[0004] In view of the above problems, an air-floating spindle with an air path structure is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an air-floating spindle with an air path structure, which can achieve contactless support between the core shaft and the shaft assembly, and ensure that no contact friction is generated between the core shaft and the shaft assembly during high-speed rotation.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The air-floating spindle with air path structure is used in a thinning machine, including:

[0008] Mandrel;

[0009] A shaft assembly, wherein the mandrel can rotate around a Z axis relative to the shaft assembly;

[0010] The air path structure includes an air intake pipeline and a first air film area. The air intake pipeline is arranged on the shaft body assembly. Along the radial direction of the core shaft, the gap between the core shaft and the shaft body assembly forms the first air film area. The air intake pipeline is used to fill the first air film area with gas to form a first air film in the first air film area. The first air film is used to air-float and support the core shaft along the radial direction of the core shaft.

[0011] As an optional solution, the shaft assembly includes:

[0012] A copper sleeve is coaxially arranged outside the core shaft, and along the radial direction of the core shaft, the gap between the core shaft and the copper sleeve forms the first air film area;

[0013] A shaft body, wherein a cavity is formed in the shaft body, the copper sleeve and the core shaft are coaxially arranged in the cavity, and a motor is also arranged in the cavity, the motor is located above the copper sleeve, and the motor includes a stator and a rotor that match each other, the protruding outer edge of the stator is placed on the top surface of the shaft body, and the rotor is fixedly sleeved on the core shaft;

[0014] An end cover, a part of which is covered on the core shaft, and another part of which is covered on the protruding outer edge of the stator.

[0015] As an optional solution, the air intake pipeline includes:

[0016] A first gas path is provided on the end cover;

[0017] a second gas path extending along the Z axis, a portion of the second gas path being disposed on the protruding outer edge of the stator, and another portion of the second gas path being disposed on the shaft body;

[0018] a branch path, one end of which is in communication with the second gas path;

[0019] A first ventilation groove, wherein the first ventilation groove is provided between the copper sleeve and the shaft body, and the other end of the branch path is communicated with the first ventilation groove;

[0020] The first vent hole extends in the radial direction of the core shaft, the first vent hole is arranged in the copper sleeve, and two ends of the first vent hole are respectively connected with the first vent groove and the first air film area.

[0021] As an optional solution, the number of the branch paths, the number of the first ventilation grooves, and the number of the first ventilation holes are respectively provided in plural, and one branch path, one first ventilation groove, and one first ventilation hole are provided correspondingly.

[0022] As an optional solution, the shaft assembly further includes:

[0023] An upper air blowing plate is placed below the copper sleeve, and the upper air blowing plate is coaxially sleeved on the core shaft;

[0024] A movable disk is disposed below the upper air blowing disk, the movable disk is coaxially sleeved on the core shaft, and along the axial direction of the core shaft, a portion of the top surface of the movable disk abuts against the step surface of the core shaft;

[0025] The lower air blowing plate is placed below the movable plate, and the lower air blowing plate is coaxially sleeved on the core shaft.

[0026] As an optional solution, the gas path structure further includes:

[0027] The second air film area is formed along the axial direction of the core shaft by the gap between part of the top surface of the movable disk and the step surface of the core shaft, and the gap between the upper air blowing disk and the remaining top surface of the movable disk. The air inlet pipeline is also used to fill the second air film area with gas to form a second air film in the second air film area. The second air film is used to air-float and support the core shaft along the axial direction of the core shaft.

[0028] As an optional solution, the air intake pipeline further includes:

[0029] A second vent hole extends along the Z axis, the second vent hole is arranged on the copper sleeve, and two ends of the second vent hole are respectively connected with the first vent groove located at the bottom layer and the top of the upper blowing plate;

[0030] The first copper nozzle is arranged in the upper air blowing plate, and two ends of the first copper nozzle are respectively connected with the top of the upper air blowing plate and the second air film area.

[0031] As an optional solution, the gas path structure further includes:

[0032] The third air film area is formed by the gap between the movable disk and the lower air blowing disk along the axial direction of the core shaft. The air inlet pipeline is also used to fill the third air film area with gas to form a third air film in the third air film area. The third air film is used to air-float and support the movable disk along the axial direction of the core shaft.

[0033] As an optional solution, the air intake pipeline further includes:

[0034] A third gas path, disposed on the shaft body, the third gas path being in communication with the second gas path;

[0035] A second ventilation groove, wherein the second ventilation groove is formed between the lower air blowing plate and the shaft body;

[0036] The second copper nozzle is arranged on the lower air blowing plate, and the two ends of the second copper nozzle are respectively connected with the second ventilation groove and the third air film area.

[0037] As an optional solution, the gas path structure further includes:

[0038] An exhaust pipeline is provided between the core shaft and the shaft assembly, and the shaft assembly is provided with the exhaust pipeline respectively.

[0039] The beneficial effects of the present invention are:

[0040] By enabling the core shaft to rotate around the Z axis relative to the shaft body assembly, and arranging an air intake pipeline on the shaft body assembly, and forming a first air film area in the gap between the core shaft and the shaft body assembly along the radial direction of the core shaft; filling gas into the first air film area through the air intake pipeline to form a first air film in the first air film area, so that the first air film can air-float and support the core shaft along the radial direction of the core shaft, so that the first air film can avoid direct contact between the core shaft and the shaft body assembly while supporting the core shaft, thereby achieving a contactless support effect between the core shaft and the shaft body assembly, so as to ensure that the core shaft will not generate contact friction with the shaft body assembly during the high-speed rotation of the core shaft, thereby better protecting the core shaft, avoiding frequent replacement of the core shaft due to severe wear of the core shaft, reducing costs and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The cross-sectional view of the air-floating main shaft with the air path structure provided by the present invention is Figure 1 ;

[0042] Figure 2 The cross-sectional view of the air-floating main shaft with the air path structure provided by the present invention is Figure 2 ;

[0043] Figure 3 It is a partial structural schematic diagram of the assembly of the mandrel and the copper sleeve provided by the present invention;

[0044] Figure 4 is a cross-sectional view of the upper air blowing disk provided by the present invention;

[0045] Figure 5 It is a cross-sectional view of the lower blowing plate provided by the present invention.

[0046] Description of reference numerals:

[0047] 1- mandrel;

[0048] 2-shaft assembly; 21-copper sleeve; 22-shaft; 23-motor; 231-stator; 2311-protruding outer edge; 232-rotor; 24-end cover; 25-upper air blowing plate; 26-movable plate; 27-lower air blowing plate; 28-air spacer; 29-dynamic balancing pressure ring; 201-plate cover; 202-base plate;

[0049] 311-first air path; 312-second air path; 313-branch path; 314-first ventilation groove; 315-first ventilation hole; 316-second ventilation hole; 317-first copper nozzle; 318-third air path; 319-second ventilation groove; 320-second copper nozzle;

[0050] 32-first air film area; 321-first air film;

[0051] 33-second air film area; 331-second air film;

[0052] 34-the third air membrane area; 341-the third air membrane. DETAILED DESCRIPTION

[0053] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0054] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0055] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0056] In this embodiment, an air-floating spindle with an air path structure and a thinning machine including the air-floating spindle with an air path structure are proposed. The air-floating spindle with an air path structure has a good air-floating support effect and can avoid generating large contact friction during operation, so that the cost of the entire air-floating spindle with an air path structure is low and the working efficiency is high.

[0057] Specifically, Figures 1 to 3 As shown, the air-floating spindle with an air path structure comprises a core shaft 1, a shaft assembly 2 and an air path structure; wherein the core shaft 1 can rotate around the Z axis relative to the shaft assembly 2; the air path structure comprises an air inlet pipeline and a first air film area 32, wherein the air inlet pipeline is arranged on the shaft assembly 2, and along the radial direction of the core shaft 1, the gap between the core shaft 1 and the shaft assembly 2 forms the first air film area 32, and the air inlet pipeline is used to fill the first air film area 32 with gas to form a first air film 321 in the first air film area 32, and the first air film 321 is used to air-float and support the core shaft 1 along the radial direction of the core shaft 1, so that there is no direct contact between the core shaft 1 and the shaft assembly 2. The radial direction of the core shaft 1 is specifically as follows: Figure 1 Horizontal direction in .

[0058] Compared with the prior art, the air-floating spindle with an air path structure in the present embodiment is additionally provided with an air path structure capable of forming a first air film 321; by enabling the core shaft 1 to rotate around the Z axis relative to the shaft assembly 2, and arranging an air inlet pipeline in the shaft assembly 2, and forming a first air film area 32 in the gap between the core shaft 1 and the shaft assembly 2 along the radial direction of the core shaft 1; filling gas into the first air film area 32 through the air inlet pipeline to form a first air film 321 in the first air film area 32, so that the first air film 321 air-floatingly supports the core shaft 1 along the radial direction of the core shaft 1, so that the first air film 321 can support the core shaft 1 while avoiding direct contact between the core shaft 1 and the shaft assembly 2, thereby realizing a contactless support effect between the core shaft 1 and the shaft assembly 2, so as to ensure that the core shaft 1 will not generate contact friction with the shaft assembly 2 during the high-speed rotation of the core shaft 1, thereby better protecting the core shaft 1, avoiding frequent replacement of the core shaft 1 due to severe wear of the core shaft 1, reducing costs and improving work efficiency.

[0059] Furthermore, if Figure 1 and Figure 2 As shown, the shaft assembly 2 includes a copper sleeve 21, a shaft body 22 and an end cover 24; wherein the copper sleeve 21 is coaxially sleeved outside the core shaft 1, and along the radial direction of the core shaft 1, the gap between the core shaft 1 and the copper sleeve 21 forms the above-mentioned first air film area 32; a cavity is formed in the shaft body 22, the copper sleeve 21 and the core shaft 1 are coaxially arranged in the cavity, and a motor 23 is also arranged in the cavity, the motor 23 is located above the copper sleeve 21, so as to provide abutment and limit to the top end of the copper sleeve 21 through the motor 23; the motor 23 includes a stator 231 and a rotor 232 used in conjunction with each other, the protruding outer edge 2311 of the stator 231 is placed on the top end surface of the shaft body 22, and the rotor 232 is fixedly sleeved on the core shaft 1, so as to drive the core shaft 1 to rotate synchronously around the Z axis through the rotor 232; a part of the end cover 24 is covered on the top end of the core shaft 1, and another part of the end cover 24 is covered on the top end of the protruding outer edge 2311 of the stator 231.

[0060] Specifically, if Figure 1 and Figure 2 As shown, the end cover 24, the protruding outer edge 2311 of the stator 231, and the shaft body 22 are axially connected by bolts; and the core shaft 1 is axially connected with the rotor 232 by bolts. Among them, the stator 231 and the rotor 232 of the motor 23 are common motor parts in the prior art, and the structure and working principle of the stator 231 and the rotor 232 are not described in detail here.

[0061] Furthermore, if Figures 1 to 3As shown, the air intake pipeline includes a first air path 311, a second air path 312, a branch path 313, a first ventilation groove 314 and a first ventilation hole 315; wherein, the first air path 311 extends along the Z axis, and the first air path 311 is arranged inside the end cover 24; the second air path 312 extends along the Z axis, a part of the second air path 312 is arranged inside the protruding outer edge 2311 of the stator 231, and the other part of the second air path 312 is arranged inside the shaft body 22; one end of the branch path 313 is connected to the second air path 312; a first ventilation groove 314 is arranged between the copper sleeve 21 and the shaft body 22, and the other end of the branch path 313 is connected to the first ventilation groove 314; the first ventilation hole 315 extends along the radial direction of the core shaft 1, and the first ventilation hole 315 is arranged inside the copper sleeve 21, and the two ends of the first ventilation hole 315 are respectively connected to the first ventilation groove 314 and the first air film area 32.

[0062] Specifically, Figure 2 and Figure 3 As shown, the gas entering the first air path 311 passes through the second air path 312, the branch path 313, the first ventilation groove 314 and the first ventilation hole 315 in sequence to reach the first air film area 32, so that the gas can form a first air film 321 in the first air film area 32, and then the core shaft 1 is radially air-floated and supported by the first air film 321 along the core shaft 1.

[0063] Furthermore, if Figures 1 to 3 As shown, the number of branch paths 313, the number of first ventilation grooves 314 and the number of first ventilation holes 315 are respectively provided in plurality, and one branch path 313, one first ventilation groove 314 and one first ventilation hole 315 are provided correspondingly, that is, the gas in a branch path 313 passes through a first ventilation groove 314 and enters a corresponding first ventilation hole 315, thereby entering the first air membrane area 32.

[0064] By providing a plurality of branch paths 313, a plurality of first ventilation grooves 314, and a plurality of first ventilation holes 315, gas can be respectively filled into each position of the first air film region 32, so as to ensure that the first air film 321 can be formed at each position of the first air film region 32, so as to ensure the integrity of the formation of the first air film 321; and, it can ensure that the gas volume distribution at each position of the first air film region 32 is relatively uniform, so as to ensure the uniformity of the formation of the first air film 321. In this embodiment, as Figure 2 and Figure 3 As shown, four branch paths 313, four first ventilation grooves 314 and four first ventilation holes 315 are provided. Here, the number of the branch paths 313, the first ventilation grooves 314 and the first ventilation holes 315 is not specifically limited.

[0065] It is worth noting that if Figure 3As shown, the first ventilation hole 315 is a micropore with a smaller aperture, so that the smaller micropore will limit the flow area of ​​the gas, so that the gas has a larger flow rate when flowing through the first ventilation hole 315, which can help the gas form the first air film 321 in the first air film area 32, thereby ensuring the smoothness and reliability of the formation of the first air film 321.

[0066] Furthermore, if Figure 1 and Figure 2 As shown, the shaft assembly 2 also includes an upper air blowing disk 25, a movable disk 26 and a lower air blowing disk 27; wherein, the upper air blowing disk 25 is coaxially sleeved on the core shaft 1, and the upper air blowing disk 25 is placed below the copper sleeve 21, so that the upper air blowing disk 25 can provide abutment and limitation to the bottom end of the copper sleeve 21; the movable disk 26 is placed below the upper air blowing disk 25, and the movable disk 26 is coaxially sleeved on the core shaft 1, and along the axial direction of the core shaft 1, part of the top surface of the movable disk 26 abuts against the step surface of the core shaft 1, so that the movable disk 26 can provide axial support to the core shaft 1; the lower air blowing disk 27 is placed below the movable disk 26, and the lower air blowing disk 27 is coaxially sleeved on the core shaft 1. The axial direction of the core shaft 1 is specifically as follows: Figure 1 The vertical direction in the middle, that is, the axial direction of the mandrel 1 is Figure 1 The direction is indicated by the arrow Z.

[0067] Specifically, Figure 1 and Figure 2 As shown, the air path structure also includes a second air film area 33. Along the axial direction of the core shaft 1, the second air film area 33 is formed by the gap between part of the top surface of the movable disk 26 and the step surface of the core shaft 1, and the gap between the upper blowing disk 25 and the remaining part of the top surface of the movable disk 26; the air inlet pipeline is also used to fill gas into the second air film area 33 to form a second air film 331 in the second air film area 33, and the second air film 331 is used to air-float and support the core shaft 1 along the axial direction of the core shaft 1.

[0068] By filling the air into the second air film area 33 through the air inlet pipeline, a second air film 331 is formed in the second air film area 33, so that the second air film 331 supports the core shaft 1 along the axial direction of the core shaft 1 by air floating, so that the second air film 331 can support the core shaft 1 while avoiding direct contact between the core shaft 1 and the movable disk 26, thereby achieving a contactless support effect between the top surface of the movable disk 26 and the step surface of the core shaft 1, so as to ensure that the core shaft 1 will not generate contact friction with the movable disk 26 during the high-speed rotation of the core shaft 1, thereby better protecting the core shaft 1 and avoiding frequent replacement of the core shaft 1 due to severe wear of the core shaft 1, thereby further reducing costs and improving work efficiency.

[0069] Furthermore, if Figure 3 and Figure 4As shown, the air intake pipeline also includes a second air vent 316 and a first copper nozzle 317; wherein, the second air vent 316 extends along the Z axis, the second air vent 316 is arranged on the copper sleeve 21, and the two ends of the second air vent 316 are respectively connected to the first air vent groove 314 located at the bottom layer and the top of the upper air blowing plate 25, so that the gas in the first air vent groove 314 of the bottom layer flows to the top surface of the upper air blowing plate 25 through the second air vent 316; the first copper nozzle 317 is arranged inside the upper air blowing plate 25, and the two ends of the first copper nozzle 317 are respectively connected to the top of the upper air blowing plate 25 and the second air film area 33, so that the gas on the top surface of the upper air blowing plate 25 flows to the second air film area 33 through the first copper nozzle 317.

[0070] Specifically, Figures 1 to 4 As shown, the gas entering the first ventilation groove 314 of the bottom layer passes through the second ventilation hole 316 and the first copper nozzle 317 in sequence and then reaches the second air film area 33, so that the gas can form a second air film 331 in the second air film area 33, and then the core shaft 1 is supported by air floating along the axial direction of the core shaft 1 through the second air film 331.

[0071] Furthermore, if Figure 3 and Figure 4 As shown, the number of second air vents 316 and the number of first copper nozzles 317 are respectively provided in plurality, the plurality of second air vents 316 are evenly arranged along the circumference of the copper sleeve 21, the plurality of first copper nozzles 317 are evenly arranged along the circumference of the upper blowing plate 25, and one second air vent 316 is correspondingly arranged to one first copper nozzle 317, that is, the gas in one second air vent 316 enters the second air film area 33 through one first copper nozzle 317.

[0072] By providing a plurality of second vent holes 316 and a plurality of first copper nozzles 317, gas can be respectively filled into each position of the second air film region 33, so as to ensure that the second air film 331 can be formed at each position of the second air film region 33, so as to ensure the integrity of the second air film 331; and, it can ensure that the gas volume distribution at each position of the second air film region 33 is relatively uniform, so as to ensure the uniformity of the formation of the second air film 331. Here, the number of the second vent holes 316 and the first copper nozzles 317 is not specifically limited.

[0073] It is worth noting that if Figure 3 As shown, the second air vent 316 is a small hole with a smaller aperture, so that the small hole will limit the flow area of ​​the gas, so that the gas has a larger flow rate when flowing through the second air vent 316, which can help the gas form a second air film 331 in the second air film area 33, thereby ensuring the smoothness and reliability of the formation of the second air film 331.

[0074] Furthermore, if Figure 1 and Figure 2 As shown, the air path structure also includes a third air film area 34. Along the axial direction of the core shaft 1, the gap between the movable disk 26 and the lower blowing air disk 27 forms the third air film area 34; the air inlet pipeline is also used to fill gas into the third air film area 34 to form a third air film 341 in the third air film area 34, and the third air film 341 is used to air-float and support the movable disk 26 along the axial direction of the core shaft 1.

[0075] By filling the third air film area 34 with gas through the air inlet pipeline, a third air film 341 is formed in the third air film area 34, so that the third air film 341 air-floats and supports the movable disk 26 along the axial direction of the core shaft 1; on the one hand, the air-floating support strength of the movable disk 26 on the core shaft 1 is improved, and the contactless support effect between the top end surface of the movable disk 26 and the step surface of the core shaft 1 is better guaranteed; on the other hand, the buffering effect between the top end surface of the movable disk 26 and the step surface of the core shaft 1 can be better, so as to better avoid the contact friction between the core shaft 1 and the movable disk 26 during the high-speed rotation of the core shaft 1.

[0076] Furthermore, since the movable disk 26 rotates synchronously with the core shaft 1, a second air film 331 and a third air film 341 are respectively formed on the upper and lower opposite sides of the movable disk 26, so as to provide better support during the rotation of the movable disk 26 while ensuring that the movable disk 26 does not contact the upper air blowing disk 25 and the lower air blowing disk 27, respectively, so as to better avoid the movable disk 26 from needing frequent replacement due to severe wear, better protect the movable disk 26, further reduce costs, and improve work efficiency.

[0077] Furthermore, if Figure 2 and Figure 5 As shown, the air intake pipeline also includes a third air path 318, a second ventilation groove 319 and a second copper nozzle 320; wherein, the third air path 318 is arranged inside the shaft body 22, and the third air path 318 is connected to the second air path 312; a second ventilation groove 319 is formed between the lower air blowing plate 27 and the shaft body 22; the second copper nozzle 320 is arranged inside the lower air blowing plate 27, and both ends of the second copper nozzle 320 are respectively connected to the second ventilation groove 319 and the third air film area 34.

[0078] Specifically, Figure 2 and Figure 5 As shown, the gas in the second air path 312 passes through the third air path 318, the second ventilation groove 319 and the second copper nozzle 320 in sequence to reach the third air film area 34, so that the gas can form a third air film 341 in the third air film area 34, and then can support the movable disk 26 along the axial direction of the core shaft 1 through the third air film 341, so that the core shaft 1 can be air-floated along the axial direction of the core shaft 1 through the movable disk 26.

[0079] Furthermore, the number of second ventilation grooves 319 and the number of second copper nozzles 320 are respectively set to be multiple, each second ventilation groove 319 is respectively connected to the third air path 318, and a second ventilation groove 319 is correspondingly arranged with a second copper nozzle 320, that is, the gas in a second ventilation groove 319 enters the third air film area 34 through a second copper nozzle 320.

[0080] By providing a plurality of second vent grooves 319 and a plurality of second copper nozzles 320, gas can be respectively filled into each position of the third air film region 34, so as to ensure that the third air film 341 can be formed at each position of the third air film region 34, so as to ensure the integrity of the formation of the third air film 341; and, it can ensure that the gas volume distribution at each position of the third air film region 34 is relatively uniform, so as to ensure the uniformity of the formation of the third air film 341. Here, the number of the second vent grooves 319 and the second copper nozzles 320 is not specifically limited.

[0081] Furthermore, if Figure 1 As shown, the shaft assembly 2 also includes an air spacer 28, a dynamic balance pressure ring 29, a disk cover 201 and a base disk 202; wherein the air spacer 28 is coaxially arranged below the upper air blowing disk 25, and the air spacer 28 is limited between the movable disk 26 and the shaft 22, and the lower air blowing disk 27 is coaxially located below the air spacer 28, that is, the upper air blowing disk 25, the air spacer 28, and the lower air blowing disk 27 are coaxial and tightly matched in the cavity of the shaft 22. Inside; the inner ring of the lower air blowing disk 27 is coaxially provided with a dynamic balancing pressure ring 29, that is, the dynamic balancing pressure ring 29 is arranged between the core shaft 1 and the lower air blowing disk 27; the disk cover 201 is coaxially arranged below the lower air blowing disk 27, the disk cover 201 is coaxial with the shaft body 22 and the two are axially connected by bolts; the base disk 202 is coaxially arranged below the disk cover 201, and the base disk 202, the dynamic balancing pressure ring 29, the movable disk 26 and the core shaft 1 are axially connected by bolts.

[0082] By providing an air spacer 28 and a dynamic balancing pressure ring 29, a certain sealing effect can be provided to prevent a large amount of gas from flowing out to the outside of the shaft assembly 2, thereby ensuring that the gas forms a first air film 321 in the first air film area 32, the gas forms a second air film 331 in the second air film area 33, and the gas forms a third air film 341 in the third air film area 34; and the dynamic balancing pressure ring 29 rotates synchronously with the core shaft 1 around the Z axis, so that the dynamic balancing pressure ring 29 can provide dynamic balancing correction for the rotation of the core shaft 1, thereby ensuring the smooth rotation of the core shaft 1 around the Z axis.

[0083] like Figure 1As shown, by arranging the core shaft 1, copper sleeve 21, shaft body 22, motor 23, end cover 24, upper air blowing disk 25, movable disk 26, lower air blowing disk 27, air spacer 28, dynamic balancing pressure ring 29, disk cover 201 and base disk 202 coaxially, the coaxiality of the core shaft 1 on the Z axis can be better guaranteed, thereby avoiding the problem of deflection of the core shaft 1 during high-speed rotation around the Z axis, and further ensuring the stability and reliability of the rotation of the core shaft 1.

[0084] Furthermore, the gas path structure also includes an exhaust pipeline, and exhaust pipelines are respectively arranged between the core shaft 1 and the shaft body assembly 2, and the shaft body assembly 2, that is, the assembly gaps between the above-mentioned core shaft 1, copper sleeve 21, shaft body 22, motor 23, end cover 24, upper air blowing disk 25, movable disk 26, lower air blowing disk 27, air spacer ring 28, dynamic balancing pressure ring 29, disk cover 201 and base disk 202 form an exhaust pipeline; on the one hand, it can ensure that the gas maintains dynamic balance in the entire air-floating spindle with the gas path structure, which is conducive to the smooth formation of the first air film 321, the second air film 331 and the third air film 341; on the other hand, while the gas is discharged through the exhaust pipeline, the gas can take away the heat generated during the operation of the core shaft 1 and the motor 23, thereby ensuring the working stability and reliability of the entire air-floating spindle with the gas path structure.

[0085] The specific working process of the air-floating spindle with the air path structure in this embodiment is as follows:

[0086] First, the gas entering the first gas path 311 passes through the second gas path 312, the branch path 313, the first ventilation groove 314 and the first ventilation hole 315 in sequence and reaches the first gas film area 32, so that the gas can form a first gas film 321 in the gap between the core shaft 1 and the copper sleeve 21. The gas in the second gas path 312 flows to the four branch paths 313 respectively.

[0087] Afterwards, the gas entering the first ventilation groove 314 of the bottom layer flows into the top of the upper blowing plate 25 through the second ventilation hole 316 of the copper sleeve 21 in turn, and then the gas at the top of the upper blowing plate 25 passes through the first copper nozzle 317 inside the upper blowing plate 25 and flows to the second air film area 33, so that the gas can form a second air film 331 in the gap between the top surface of the movable plate 26 and the upper blowing plate 25, and in the gap between the top surface of the movable plate 26 and the step surface of the core shaft 1.

[0088] At the same time, the gas in the second air path 312 can flow to the second ventilation groove 319 through the third air path 318 inside the shaft body 22, and then flow from the second ventilation groove 319 to the second copper nozzle 320, so that the gas in the second copper nozzle 320 flows to the third air film area 34, so that the gas can form a third air film 341 in the gap between the movable disk 26 and the lower blowing disk 27.

[0089] The air-floating spindle with an air path structure in the present embodiment is able to ensure the air-floating support effect on the core shaft 1 in the radial and axial directions by setting an air intake pipeline, a first air film area 32, a second air film area 33 and a third air film area 34 that are used in conjunction with each other, thereby avoiding the contact friction between the core shaft 1 and the copper sleeve 21 and the movable disk 26 respectively during the rotation process, thereby better protecting the core shaft 1; and the formed second air film 331 and the third air film 341 can also make the movable disk 26 float between the upper blowing disk 25 and the lower blowing disk 27, thereby avoiding the friction between the movable disk 26 and the upper blowing disk 25 and the lower blowing disk 27 respectively during the working process, thereby better protecting the movable disk 26; and the air intake pipeline is composed of multiple air paths, multiple branch paths 313, multiple ventilation grooves and multiple ventilation holes, so that the structure of the air intake pipeline is simple and the air intake is smooth.

[0090] The air-floating spindle with an air path structure in this embodiment forms an exhaust pipeline by utilizing the assembly gaps between the core shaft 1, copper sleeve 21, shaft body 22, motor 23, end cover 24, upper air blowing disk 25, movable disk 26, lower air blowing disk 27, air spacer ring 28, dynamic balancing pressure ring 29, disk cover 201 and base disk 202. It has a simple structure and does not require an additional separate pipeline for exhaust. It can also discharge the heat generated by the core shaft 1 and the motor 23 during operation while ensuring gas balance.

[0091] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An air-floating spindle with an air path structure, used in a thinning machine, characterized in that: include: Mandrel (1); A shaft assembly (2), wherein the core shaft (1) is capable of rotating around a Z axis relative to the shaft assembly (2); An air path structure comprises an air intake pipeline and a first air film area (32); the air intake pipeline is arranged on the shaft assembly (2); along the radial direction of the core shaft (1), a gap between the core shaft (1) and the shaft assembly (2) forms the first air film area (32); the air intake pipeline is used to fill the first air film area (32) with gas to form a first air film (321) in the first air film area (32); the first air film (321) is used to air-float and support the core shaft (1) along the radial direction of the core shaft (1).

2. The air-floating spindle with an air path structure according to claim 1, characterized in that: The shaft assembly (2) comprises: A copper sleeve (21) is coaxially sleeved outside the core shaft (1), and along the radial direction of the core shaft (1), a gap between the core shaft (1) and the copper sleeve (21) forms the first air film area (32); A shaft body (22), wherein a cavity is formed in the shaft body (22), the copper sleeve (21) and the core shaft (1) are coaxially arranged in the cavity, and a motor (23) is also arranged in the cavity, the motor (23) is located above the copper sleeve (21), and the motor (23) comprises a stator (231) and a rotor (232) that match each other, the protruding outer edge (2311) of the stator (231) is placed on the top end surface of the shaft body (22), and the rotor (232) is fixedly sleeved on the core shaft (1); An end cover (24), wherein a portion of the end cover (24) is disposed on the core shaft (1), and another portion of the end cover is disposed on a protruding outer edge (2311) of the stator (231).

3. The air-floating spindle with an air path structure as claimed in claim 2, characterized in that: The air intake pipeline comprises: A first gas path (311) is provided on the end cover (24); A second gas path (312) extending along the Z axis, a portion of the second gas path (312) being disposed on a protruding outer edge (2311) of the stator (231), and another portion of the second gas path (312) being disposed on the shaft (22); A branch path (313), one end of the branch path (313) being in communication with the second gas path (312); A first ventilation groove (314), wherein the first ventilation groove (314) is provided between the copper sleeve (21) and the shaft body (22), and the other end of the branch path (313) is in communication with the first ventilation groove (314); The first vent hole (315) extends in the radial direction of the core shaft (1). The first vent hole (315) is arranged on the copper sleeve (21). Two ends of the first vent hole (315) are respectively connected to the first vent groove (314) and the first air film area (32).

4. The air-floating spindle with an air path structure as claimed in claim 3, characterized in that: The number of the branch paths (313), the number of the first ventilation grooves (314) and the number of the first ventilation holes (315) are respectively provided in plural numbers, and one branch path (313), one first ventilation groove (314) and one first ventilation hole (315) are provided correspondingly.

5. The air-floating spindle with an air path structure as claimed in claim 3, characterized in that: The shaft assembly (2) further comprises: An upper air blowing disk (25) is placed below the copper sleeve (21), and the upper air blowing disk (25) is coaxially sleeved on the core shaft (1); A movable disk (26) is disposed below the upper air blowing disk (25), the movable disk (26) being coaxially sleeved on the core shaft (1), and along the axial direction of the core shaft (1), a portion of the top surface of the movable disk (26) abuts against the step surface of the core shaft (1); The lower air blowing disk (27) is placed below the movable disk (26), and the lower air blowing disk (27) is coaxially sleeved on the core shaft (1).

6. The air-floating spindle with an air path structure as claimed in claim 5, characterized in that: The gas path structure also includes: The second air film area (33) is formed along the axial direction of the core shaft (1) by a gap between a portion of the top end surface of the movable disk (26) and the step surface of the core shaft (1), and a gap between the upper air blowing disk (25) and the remaining portion of the top end surface of the movable disk (26). The air inlet pipeline is also used to fill the second air film area (33) with gas to form a second air film (331) in the second air film area (33). The second air film (331) is used to air-float and support the core shaft (1) along the axial direction of the core shaft (1).

7. The air-floating spindle with an air path structure as claimed in claim 6, characterized in that: The air intake line also includes: A second vent hole (316) extending along the Z axis, the second vent hole (316) being arranged on the copper sleeve (21), and two ends of the second vent hole (316) being respectively connected to the first vent groove (314) located at the bottom layer and the top end of the upper blowing plate (25); The first copper nozzle (317) is arranged in the upper air blowing disk (25), and the two ends of the first copper nozzle (317) are respectively connected to the top of the upper air blowing disk (25) and the second air film area (33).

8. The air-floating spindle with an air path structure as claimed in claim 5, characterized in that: The gas path structure also includes: A third air film area (34) is formed along the axial direction of the core shaft (1) by a gap between the movable disk (26) and the lower blowing disk (27). The air inlet pipeline is also used to fill the third air film area (34) with gas to form a third air film (341) in the third air film area (34). The third air film (341) is used to air-float and support the movable disk (26) along the axial direction of the core shaft (1).

9. The air-floating spindle with an air path structure as claimed in claim 8, characterized in that: The air intake line also includes: A third gas path (318), disposed on the shaft body (22), the third gas path (318) being in communication with the second gas path (312); A second ventilation groove (319), wherein the second ventilation groove (319) is formed between the lower air blowing plate (27) and the shaft body (22); The second copper nozzle (320) is arranged on the lower air blowing plate (27), and the two ends of the second copper nozzle (320) are respectively connected to the second ventilation groove (319) and the third air film area (34).

10. The air-floating spindle with an air path structure according to any one of claims 1 to 9, characterized in that: The gas path structure also includes: An exhaust pipeline is provided between the core shaft (1) and the shaft assembly (2), and the shaft assembly (2) is provided with the exhaust pipeline respectively.

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