Four-groove dynamic and static pressure spindle structure

Abstract

The utility model relates to a kind of four-slot dynamic and static pressure spindle structure, it includes main shaft, sliding bearing and thrust bearing, the sliding bearing is sleeved on main shaft, the thrust bearing is connected with main shaft;Four slots are equipped on the sliding bearing, the inner surface of sliding bearing is divided into upper static pressure cavity, lower static pressure cavity, front end static pressure cavity and rear end static pressure cavity, the four slots completely disconnect each static pressure cavity, to enhance the dynamic pressure effect when main shaft rotates, improve the rigidity of main shaft.The rigidity of the utility model main shaft is significantly improved, operates more stably, so the grinding capacity that can be borne is also stronger.This not only improves grinding efficiency, but also significantly improves grinding quality, especially the surface quality of roller.

Description

Technical Field

[0001] This utility model relates to the field of roll grinding, specifically a four-groove dynamic and static pressure spindle structure. Background Technology

[0002] In the field of roll grinding, the rigidity of the spindle is a key factor that determines the grinding accuracy and efficiency.

[0003] Due to structural limitations in traditional spindle designs, their rigidity is insufficient to meet the demands of high-precision grinding. During grinding, the impact loads on the spindle can easily cause slight wobble. This wobble not only affects the stability of the grinding wheel but also leaves uneven patterns on the roller surface, severely impacting grinding quality. Traditional spindle designs are relatively conservative in their layout of the hydrostatic chamber and the number of grooves, failing to fully utilize the dynamic pressure effect generated during spindle rotation to resist the impact of grinding forces, thus limiting the improvement of spindle performance.

[0004] To improve spindle rigidity, existing technologies attempt to increase the spindle diameter, use high-strength materials, or optimize bearing structures. However, these methods are often limited by equipment size and cost in practical applications. Some studies have attempted to enhance the hydrodynamic effect by improving the bearing groove design, but these designs are typically complex and have limited effectiveness. Existing spindle structures are deficient in both rigidity and hydrodynamic effect, leading to spindle wobble during grinding and affecting grinding quality. Current improvement methods have limitations and cannot effectively improve spindle performance without increasing equipment cost and size. Utility Model Content

[0005] The present invention aims to overcome the defects of the prior art and provide a four-groove dynamic and static pressure spindle structure, which solves the problem of insufficient spindle rigidity during the rolling mill grinding process.

[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0007] A four-groove hydrostatic spindle structure is characterized in that it includes a spindle, a sliding bearing, and a thrust bearing. The sliding bearing is mounted on the spindle, and the thrust bearing is connected to the spindle. The sliding bearing has four grooves that divide its inner surface into an upper hydrostatic chamber, a lower hydrostatic chamber, a front hydrostatic chamber, and a rear hydrostatic chamber. The four grooves completely disconnect the hydrostatic chambers to enhance the hydrostatic effect during spindle rotation and improve the rigidity of the spindle.

[0008] The four-groove hydrodynamic spindle structure is characterized in that: the sliding bearing is a multi-oil wedge hydrodynamic bearing, the four grooves are evenly distributed along the circumference of the sliding bearing, and the depth and width of each groove are optimized to maximize the hydrodynamic effect generated by the spindle during rotation.

[0009] The four-groove hydrostatic spindle structure is characterized in that: the upper hydrostatic chamber, lower hydrostatic chamber, front hydrostatic chamber and rear hydrostatic chamber are respectively connected to an external oil source through independent oil supply channels to ensure that the oil pressure in each hydrostatic chamber is stable and can be adjusted independently.

[0010] The four-groove hydrostatic spindle structure is characterized in that: the upper static pressure cavity and the lower static pressure cavity are located on the upper and lower sides of the inner surface of the sliding bearing, respectively, and are arranged symmetrically to provide vertical support force;

[0011] The front and rear hydrostatic chambers are located at the front and rear ends of the inner surface of the sliding bearing, respectively, and are used to provide axial and radial auxiliary support forces. Together with the upper and lower hydrostatic chambers, they form a stable support system.

[0012] The four-groove hydrostatic spindle structure is characterized in that: the thrust bearing is fixed to the end of the spindle by fasteners or integrally formed with the spindle, and its inner surface is in close contact with the outer surface of the spindle to bear the axial force generated when the spindle rotates.

[0013] The four-groove hydrostatic spindle structure is characterized in that the clearance between the spindle and the sliding bearing is 0.01mm to 0.05mm to ensure the effective exertion of the hydrostatic effect, while avoiding leakage and reduced lubrication effect caused by excessive clearance.

[0014] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a four-groove hydrostatic spindle structure. First, this structure uses a sliding bearing with four grooves and four hydrostatic chambers. These grooves divide the inner surface of the sliding bearing into an upper hydrostatic chamber, a lower hydrostatic chamber, a front hydrostatic chamber, and a rear hydrostatic chamber, and the four grooves completely disconnect each hydrostatic chamber. This design can better utilize the hydrostatic effect generated when the spindle rotates, thereby effectively improving the rigidity of the spindle. The increased spindle rigidity means that during the roll grinding process, the spindle can more stably withstand the grinding force, reducing the shaking caused by insufficient rigidity, thus avoiding patterns left on the roll surface and significantly improving the grinding quality.

[0015] Secondly, the sliding bearing adopts a multi-oil wedge hydrodynamic bearing design, with four grooves evenly distributed along the circumference of the sliding bearing, and the depth and width of each groove are optimized. This optimized design maximizes the hydrodynamic effect generated by the spindle during rotation, further enhancing the spindle's rigidity. Simultaneously, the multi-oil wedge design also helps form a more stable oil film, improving the bearing's load-bearing capacity and service life.

[0016] Furthermore, each hydrostatic chamber is connected to an external oil source via an independent oil supply channel, ensuring stable and independently adjustable oil pressure within each chamber. This independent oil supply design allows the system to flexibly adjust the oil pressure in each hydrostatic chamber according to actual operating conditions, thereby optimizing the spindle support and improving system stability and reliability.

[0017] In terms of the support system, the upper and lower hydrostatic chambers are symmetrically arranged on the upper and lower sides of the inner surface of the sliding bearing, providing vertical support force; the front and rear hydrostatic chambers are located at the front and rear ends of the inner surface of the sliding bearing, respectively, providing axial and radial auxiliary support forces. These four hydrostatic chambers work together to form a stable support system, ensuring that the spindle maintains a stable operating state during rotation.

[0018] The thrust bearing is fixed to the end of the spindle by fasteners or integrally formed with the spindle. Its inner surface fits tightly with the outer surface of the spindle to withstand the axial force generated when the spindle rotates. This design effectively prevents the spindle from displacing in the axial direction, improving the overall rigidity and stability of the system.

[0019] Finally, the clearance between the spindle and the sliding bearing is precisely controlled between 0.01mm and 0.05mm. This clearance range ensures the effective application of the hydrodynamic effect while avoiding leakage and reduced lubrication due to excessive clearance. By precisely controlling the clearance, the system can maximize the spindle's operational rigidity and stability while ensuring lubrication. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the structure of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0023] like Figure 1As shown: A four-groove hydrostatic spindle structure includes a spindle, a sliding bearing, and a thrust bearing. The sliding bearing is mounted on the spindle, and the thrust bearing is connected to the spindle. The sliding bearing 6 has four grooves 5, which divide the inner surface of the sliding bearing into an upper hydrostatic chamber 1, a lower hydrostatic chamber 2, a front hydrostatic chamber 3, and a rear hydrostatic chamber 4. The four grooves completely disconnect each hydrostatic chamber to enhance the hydrostatic effect when the spindle rotates and improve the rigidity of the spindle.

[0024] The sliding bearing is a multi-oil wedge hydrodynamic bearing. The four grooves are evenly distributed along the circumference of the sliding bearing, and the depth and width of each groove are optimized to maximize the hydrodynamic effect generated by the spindle during rotation.

[0025] The upper static pressure chamber, lower static pressure chamber, front static pressure chamber, and rear static pressure chamber are each connected to an external oil source through independent oil supply channels to ensure that the oil pressure in each static pressure chamber is stable and can be adjusted independently.

[0026] The upper and lower static pressure chambers are located on the upper and lower sides of the inner surface of the sliding bearing, respectively, and are arranged symmetrically to provide vertical support force.

[0027] The front and rear hydrostatic chambers are located at the front and rear ends of the inner surface of the sliding bearing, respectively, and are used to provide axial and radial auxiliary support forces. Together with the upper and lower hydrostatic chambers, they form a stable support system.

[0028] The thrust bearing is fixed to the end of the spindle by fasteners or is integrally formed with the spindle. Its inner surface fits tightly with the outer surface of the spindle and bears the axial force generated when the spindle rotates.

[0029] The clearance between the spindle and the sliding bearing is 0.01mm to 0.05mm to ensure the effective application of the hydrodynamic effect, while avoiding leakage and reduced lubrication caused by excessive clearance.

[0030] The sliding bearing is one of the core components of this embodiment. Its inner surface is meticulously designed with four grooves, dividing the interior of the sliding bearing into an upper hydrostatic chamber, a lower hydrostatic chamber, a front hydrostatic chamber, and a rear hydrostatic chamber. These four grooves are not only precisely positioned but also completely disconnected. This design maximizes the hydrodynamic effect generated during spindle rotation. When the spindle rotates at high speed, the lubricating oil forms a stable hydrodynamic oil film within the hydrostatic chamber, providing strong support for the spindle, effectively resisting the impact forces generated during grinding, and ensuring the smooth operation of the spindle.

[0031] The thrust bearing is tightly connected to the spindle, and its inner surface fits perfectly with the outer surface of the spindle. It can withstand the axial force generated when the spindle rotates, prevent the spindle from displacing in the axial direction, and further enhance the stability of the spindle.

[0032] The four-slot hydrostatic spindle structure of this embodiment can be implemented according to the following steps:

[0033] Parts machining and assembly: Precisely machine parts such as sliding bearings, thrust bearings, and spindles according to design requirements. Ensure the four slots on the sliding bearings are accurately positioned and dimensionally precise. Mount the sliding bearings onto the spindle and secure the thrust bearings to the end of the spindle with fasteners, or use an integral design with the spindle, ensuring that the clearances between all parts meet design requirements (typically 0.01mm to 0.05mm).

[0034] Oil supply system connection: The upper static pressure chamber, lower static pressure chamber, front static pressure chamber, and rear static pressure chamber are each connected to an external oil source through independent oil supply channels. This ensures that the oil supply system can stably and reliably provide lubricating oil to each static pressure chamber and can independently adjust the oil pressure of each static pressure chamber according to actual working conditions.

[0035] Debugging and Optimization: After assembly, the four-slot hydrostatic spindle structure is debugged. The spindle's operating condition is optimized by adjusting the oil pressure and flow rate of the oil supply system. Simultaneously, key indicators such as spindle operating rigidity, grinding efficiency, and quality are monitored to ensure that design requirements are met.

[0036] Through the special design of the four slots and hydrostatic chamber, the operating rigidity of the spindle is significantly improved. This allows the spindle to withstand grinding forces more stably during grinding, reducing wobbling and vibration caused by insufficient rigidity.

[0037] The increased spindle rigidity enhances stability during the grinding process, enabling it to withstand greater grinding loads. This allows the spindle structure of this embodiment to be adapted to a wider range of grinding needs, improving the adaptability and flexibility of grinding.

[0038] The improved spindle stability reduces vibration and wobbling during grinding, thereby increasing grinding efficiency. Simultaneously, the improvement in grinding quality is particularly significant, especially in the surface quality of the rolls, which is markedly improved, reducing defects such as roll surface patterns.

[0039] Because the spindle experiences less impact and vibration during grinding, its service life is extended. This reduces equipment maintenance costs and replacement frequency, improving economic efficiency.

[0040] In summary, the four-slot hydrostatic spindle structure of this embodiment, through its unique design and working principle, significantly improves the spindle's operating rigidity and grinding capability, while also enhancing grinding efficiency and quality, demonstrating significant technical advantages and economic benefits.

[0041] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A four-pocket hydrostatic spindle structure, characterized by: It includes a spindle, a sliding bearing, and a thrust bearing. The sliding bearing is mounted on the spindle, and the thrust bearing is connected to the spindle. The sliding bearing has four grooves that divide the inner surface of the sliding bearing into an upper static pressure chamber, a lower static pressure chamber, a front static pressure chamber, and a rear static pressure chamber. The four grooves completely disconnect each static pressure chamber to enhance the dynamic pressure effect when the spindle rotates and improve the rigidity of the spindle.

2. The four-groove dynamic- and static-pressure spindle structure according to claim 1, characterized in that: The sliding bearing is a multi-oil wedge hydrodynamic bearing. The four grooves are evenly distributed along the circumference of the sliding bearing, and the depth and width of each groove are optimized to maximize the hydrodynamic effect generated by the spindle during rotation.

3. The four-pocket hydrostatic spindle structure of claim 1, wherein: The upper static pressure chamber, lower static pressure chamber, front static pressure chamber, and rear static pressure chamber are each connected to an external oil source through independent oil supply channels to ensure that the oil pressure in each static pressure chamber is stable and can be adjusted independently.

4. The four-pocket hydrostatic spindle structure of claim 1, wherein: The upper and lower static pressure chambers are located on the upper and lower sides of the inner surface of the sliding bearing, respectively, and are arranged symmetrically to provide vertical support force. The front and rear hydrostatic chambers are located at the front and rear ends of the inner surface of the sliding bearing, respectively, and are used to provide axial and radial auxiliary support forces. Together with the upper and lower hydrostatic chambers, they form a stable support system.

5. The four-pocket hydrostatic spindle structure of claim 1, wherein: The thrust bearing is fixed to the end of the spindle by fasteners or is integrally formed with the spindle. Its inner surface fits tightly with the outer surface of the spindle and bears the axial force generated when the spindle rotates.

6. The four-pocket hydrostatic spindle structure of claim 1, wherein: The clearance between the spindle and the sliding bearing is 0.01mm to 0.05mm to ensure the effective application of the hydrodynamic effect, while avoiding leakage and reduced lubrication caused by excessive clearance.

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