Hydrostatic high load spindle system

Abstract

The utility model discloses a kind of liquid static pressure high bearing main shaft systems, belong to main shaft technical field, including box, its characterized in that: the front cover is fixedly arranged at the front end of the box, the back cover is fixedly arranged at the rear end of the box, steel sleeve is fixedly arranged at both ends in the box, static pressure bearing is fixedly arranged in the steel sleeve, thrust bearing is fixedly arranged in the back cover, main shaft is arranged in static pressure bearing, thrust bearing, oil inlet filter is fixedly arranged on the upper portion of the box, oil inlet joint is arranged on the upper portion of the oil inlet filter, main oil inlet is arranged in the lower portion of the oil inlet filter, in the box, oil return groove is arranged in the box, oil return port is fixedly arranged in the lower portion of the rear end of the box, the utility model makes that main shaft can keep stable even if additional load is received, effectively avoid the damage of main shaft and the connection position of the system simultaneously, significantly reduce kinetic energy loss.

Description

Technical Field

[0001] This utility model relates to the field of spindle technology, specifically a high-load-bearing hydrostatic spindle system. Background Technology

[0002] Spindles are widely used in industrial activities and are mainly connected to their respective equipment via bearings. As a traditional connection method, they achieve a good balance in terms of functionality and stability. However, in practical applications, they cannot always be guaranteed to be in an ideal working environment. For example, they are often subjected to additional loads in the axial and radial directions. In particular, when subjected to additional loads in the radial direction, the spindle rotation will deviate from the axis, and the rotation will become unstable, increasing kinetic energy loss and even increasing the risk of damage to the bearings and spindle. Based on this situation, how to make the spindle remain stable even when subjected to additional loads, reduce kinetic energy loss, and avoid damage to the connection between the spindle and its respective equipment has become an increasingly urgent problem for relevant technical personnel to solve. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a high load-bearing hydrostatic spindle system.

[0004] A high-load-bearing hydrostatic spindle system includes a housing, characterized in that: a front cover is fixedly installed at the front end of the housing, a rear cover is fixedly installed at the rear end of the housing, steel sleeves are fixedly installed at both ends inside the housing, hydrostatic bearings are fixedly installed inside the steel sleeves, a thrust bearing is fixedly installed inside the rear cover, a spindle is installed inside the hydrostatic bearings and the thrust bearings, an oil inlet filter is fixedly installed at the upper part of the housing, an oil inlet connector is installed at the upper part of the oil inlet filter, a main oil inlet channel is installed at the lower part of the oil inlet filter and inside the housing, an oil return groove is installed inside the housing, and an oil return port is fixedly installed at the lower rear end of the housing.

[0005] Furthermore, the hydrostatic bearing and the thrust bearing limit the spindle in the radial direction, and a protrusion is provided on the end of the spindle near the thrust bearing. The hydrostatic bearing and the thrust bearing limit the protrusion in the axial direction.

[0006] Furthermore, a first branch oil inlet is provided at the lower part of the main oil inlet, the first branch oil inlet extending to the hydrostatic bearing. An oil guide groove is provided on the outside of the hydrostatic bearing at a position corresponding to the first branch oil inlet, and a second branch oil inlet is provided on the inside of the hydrostatic bearing at a position corresponding to the oil guide groove. The second branch oil inlet extends to the main shaft in both the vertical and horizontal directions. The main oil inlet, the first branch oil inlet, the oil guide groove, and the second branch oil inlet are interconnected.

[0007] Furthermore, the hydrostatic bearing is provided with a main oil outlet passage, the upper end of which extends to the main shaft and the lower end of which extends to the oil return groove. The main oil outlet passage is located below the main oil inlet passage, and a main oil return hole is provided through the oil return groove and the oil return port.

[0008] Furthermore, a secondary oil inlet channel is provided inside the rear cover, which is connected to the main oil inlet channel and extends into the thrust bearing. A secondary oil outlet channel is provided inside the rear cover, with its upper end extending to the main shaft and its lower end extending to the housing. The secondary oil outlet channel is located below the secondary oil inlet channel, and a secondary oil return hole is provided between the secondary oil outlet channel and the oil return groove.

[0009] The beneficial effects of this utility model's hydrostatic high-load-bearing spindle system are as follows:

[0010] 1. This system eliminates traditional bearings and replaces them with high-pressure fluid, which is mainly high-pressure oil. Through the dynamic balance of high-pressure oil introduction and deleting, the spindle can remain stable even under additional loads. In addition, the spindle does not come into contact with the bearing in the traditional connection method, which effectively avoids damage to the connection between the spindle and the system and significantly reduces kinetic energy loss.

[0011] 2. The oil inlet filter, main oil inlet, first branch oil inlet, oil guide groove, second branch oil inlet, and auxiliary oil inlet effectively ensure smooth and uniform oil intake, while the main oil outlet, auxiliary oil outlet, return oil hole, return oil groove, and return oil port effectively ensure smooth oil output. This effectively ensures the dynamic balance of high-pressure oil within the system. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0015] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0016] Figure 4 This is a schematic diagram of the structure of the box body of this utility model.

[0017] Among them, 1-main spindle, 2-front cover, 3-box body, 4-steel sleeve, 5-oil inlet filter, 6-hydrostatic bearing, 7-thrust bearing, 8-rear cover, 9-oil return port, 10-main oil return hole, 11-oil return groove, 12-main oil inlet channel, 13-first branch oil inlet channel, 14-oil guide groove, 15-second branch oil inlet channel, 16-protrusion, 17-secondary oil inlet channel, 18-secondary oil return hole, 19-secondary oil outlet channel, 20-oil inlet connector. Detailed Implementation

[0018] To make the explanation clearer, the present invention provides a further description of a high-load-bearing hydrostatic spindle system, in conjunction with the accompanying drawings.

[0019] A high-load-bearing hydrostatic spindle system includes a housing 3, characterized in that: a front cover 2 is fixedly installed at the front end of the housing 3, a rear cover 8 is fixedly installed at the rear end of the housing 3, steel sleeves 4 are fixedly installed at both ends inside the housing 3, hydrostatic bearings 6 are fixedly installed inside the steel sleeves 4, a thrust bearing 7 is fixedly installed inside the rear cover 8, a spindle 1 is installed inside the hydrostatic bearings 6 and the thrust bearings 7, an oil inlet filter 5 is fixedly installed at the upper part of the housing 3, an oil inlet connector 20 is installed at the upper part of the oil inlet filter 5, a main oil inlet channel 12 is installed at the lower part of the oil inlet filter 5 and inside the housing 3, an oil return groove 11 is installed inside the housing 3, and an oil return port 9 is fixedly installed at the lower rear end of the housing 3.

[0020] Furthermore, the hydrostatic bearing 6 and the thrust bearing 7 limit the spindle 1 in the radial direction, and a protrusion 16 is provided on one end of the spindle 1 near the thrust bearing 7. The hydrostatic bearing 6 and the thrust bearing 7 limit the protrusion 16 in the axial direction.

[0021] Furthermore, a first branch oil inlet 13 is provided at the lower part of the main oil inlet 12. The first branch oil inlet 13 extends to the hydrostatic bearing 6. An oil guide groove 14 is provided on the outside of the hydrostatic bearing 6 at a position corresponding to the first branch oil inlet 13. A second branch oil inlet 15 is provided inside the hydrostatic bearing 6 at a position corresponding to the oil guide groove 14. The second branch oil inlet 15 extends to the main shaft 1 in both the vertical and horizontal directions. The main oil inlet 12, the first branch oil inlet 13, the oil guide groove 14, and the second branch oil inlet 15 are interconnected.

[0022] Furthermore, the hydrostatic bearing 6 is provided with a main oil outlet channel inside, the upper end of the main oil outlet channel extends to the main shaft 1, the lower end of the main oil outlet channel extends to the oil return groove 11, the main oil outlet channel is located below the main oil inlet channel 12, and a main oil return hole 10 is provided through the oil return groove 11 and the oil return port 9.

[0023] Furthermore, a secondary oil inlet channel 17 is provided inside the rear cover 8. The secondary oil inlet channel 17 is connected to the main oil inlet channel 12 and extends into the thrust bearing 7. A secondary oil outlet channel 19 is provided inside the rear cover 8. The upper end of the secondary oil outlet channel 19 extends into the main shaft 1, and the lower end of the secondary oil outlet channel 19 extends into the housing 3. The secondary oil outlet channel 19 is located below the secondary oil inlet channel 17. A secondary oil return hole 18 is provided through the secondary oil outlet channel 19 and the oil return groove 11.

[0024] The working principle of this utility model's high-load-bearing hydrostatic spindle system is as follows: The system is placed flat in the working position. The oil inlet connector 20 is connected to the oil source. The rear end of the spindle 1 is fixedly connected to the output shaft of the motor. The oil inlet filter 5 and the motor are started. The oil inlet filter 5 supplies high-pressure oil to the housing 3 through the main oil inlet channel 12. A portion of the high-pressure oil reaches the guide groove 14 through the first branch oil inlet channel 13, and then reaches the space between the hydrostatic bearing 6 and the spindle 1 through the second branch oil inlet channel 15. Another portion of the high-pressure oil reaches the space between the thrust bearing 7 and the spindle 1 through the auxiliary oil inlet channel 17. The high-pressure oil between the hydrostatic bearing 6 and the spindle 1 flows into the return oil groove 11 through the main oil outlet channel. The high-pressure oil between the thrust bearing 7 and the spindle 1 flows into the auxiliary return oil hole 18 through the auxiliary oil outlet channel 19, and then into the return oil groove 11. The oil in the return oil groove 11 flows through the return oil port... 9. The high-pressure oil is discharged, thus achieving a dynamic balance between the hydrostatic bearing 6, the thrust bearing 7, and the main shaft 1. The main shaft 1 is always enveloped by the oil film formed by the high-pressure oil and remains in a balanced state. Even if subjected to additional loads, this balance will not be disrupted. When the load is a radial load, the hydrostatic bearing 6, the thrust bearing 7, and the oil film keep the main shaft 1 stable in the radial direction. When the load is an axial load, the hydrostatic bearing 6, the thrust bearing 7, and the oil film keep the protrusion 16 and the main shaft 1 stable in the axial direction. In fact, tests have shown that the radial and axial loading forces of the main shaft 1 are not less than 50KN. Thus, the main shaft 1 can rotate continuously at high speed and stably under the drive of the motor. In addition, the main shaft 1 does not come into contact with the bearings in the traditional connection method, effectively avoiding damage to its connection position with the system, and significantly reducing kinetic energy loss.

[0025] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A high-load-bearing hydrostatic spindle system, comprising a housing, characterized in that: A front cover is fixedly installed at the front end of the housing, and a rear cover is fixedly installed at the rear end of the housing. Steel sleeves are fixedly installed at both ends inside the housing. A hydrostatic bearing is fixedly installed inside the steel sleeve. A thrust bearing is fixedly installed inside the rear cover. A main shaft is installed inside the hydrostatic bearing and the thrust bearing. An oil inlet filter is fixedly installed at the top of the housing. An oil inlet connector is installed at the top of the oil inlet filter. A main oil inlet channel is installed at the bottom of the oil inlet filter and inside the housing. An oil return groove is installed inside the housing. An oil return port is fixedly installed at the lower rear end of the housing.

2. The hydrostatic high-load-bearing spindle system according to claim 1, characterized in that, The hydrostatic bearing and thrust bearing limit the spindle in the radial direction. A protrusion is provided at one end of the spindle near the thrust bearing, and the hydrostatic bearing and thrust bearing limit the protrusion in the axial direction.

3. The hydrostatic high-load-bearing spindle system according to claim 1, characterized in that, A first branch oil inlet is provided at the lower part of the main oil inlet, which extends to the hydrostatic bearing. An oil guide groove is provided on the outside of the hydrostatic bearing at a position corresponding to the first branch oil inlet. A second branch oil inlet is provided inside the hydrostatic bearing at a position corresponding to the oil guide groove. The second branch oil inlet extends to the main shaft in both the vertical and horizontal directions. The main oil inlet, the first branch oil inlet, the oil guide groove, and the second branch oil inlet are interconnected.

4. The hydrostatic high-load-bearing spindle system according to claim 1, characterized in that, The hydrostatic bearing is provided with a main oil outlet passage. The upper end of the main oil outlet passage extends to the main shaft, and the lower end of the main oil outlet passage extends to the oil return groove. The main oil outlet passage is located below the main oil inlet passage. A main oil return hole is provided through the oil return groove and the oil return port.

5. The hydrostatic high-load-bearing spindle system according to claim 1, characterized in that, The rear cover is provided with a secondary oil inlet channel, which is connected to the main oil inlet channel and extends into the thrust bearing. The rear cover is also provided with a secondary oil outlet channel, the upper end of which extends to the main shaft and the lower end of which extends to the housing. The secondary oil outlet channel is located below the secondary oil inlet channel, and a secondary oil return hole is provided between the secondary oil outlet channel and the oil return groove.

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