Deep and shallow cavity dynamic pressure spindle structure

Abstract

The utility model relates to a kind of deep and shallow cavity dynamic pressure spindle structure, it includes main shaft, sliding bearing and thrust bearing, the sliding bearing is equipped with four static pressure cavities, every static pressure cavity is communicated with a shallow cavity, the main shaft generates dynamic pressure effect by the synergistic effect of static pressure cavity and shallow cavity, to enhance the rigidity of main shaft and resist the impact of grinding force.The utility model improves grinding efficiency, grinding quality, especially the surface quality of roll.

Description

Technical Field

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

[0002] The rigidity of the spindle plays a crucial role in roll grinding, directly affecting the stability of the grinding wheel, grinding accuracy, and quality. Insufficient spindle rigidity is a common problem in existing roll grinding technologies. When the grinding wheel encounters impact loads during grinding, even slight spindle wobble can lead to serious quality issues, such as increased surface roughness and decreased dimensional accuracy. Furthermore, existing spindle structures often fail to provide sufficient rigidity support when facing high impact loads.

[0003] Existing spindle structures typically employ traditional bearing designs, which have significant limitations in high-precision grinding processes. For example, while increasing the spindle diameter or using higher-strength materials can improve rigidity to some extent, these methods not only increase manufacturing costs but may also lead to increased spindle weight, affecting the overall performance and energy consumption of the machine tool. Furthermore, these improvements still cannot completely eliminate vibrations during the grinding process, especially under high-impact loads. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide a deep and shallow cavity hydrostatic spindle structure to solve the problem of insufficient spindle rigidity when the grinding wheel encounters impact load during grinding.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] A deep-shallow cavity hydrostatic spindle structure is characterized in that it includes a spindle, a sliding bearing, and a thrust bearing. The sliding bearing is provided with four hydrostatic cavities, each of which is connected to a shallow cavity. The spindle generates a hydrostatic effect through the synergistic effect of the hydrostatic cavities and the shallow cavities to enhance the rigidity of the spindle and resist the impact of grinding forces.

[0007] The aforementioned deep and shallow cavity hydrostatic spindle structure is characterized in that: the hydrostatic cavity is provided with hydrostatic support through a high-pressure oil source, and the shallow cavity is connected to the hydrostatic cavity, so that the high-pressure oil in the hydrostatic cavity can flow into the shallow cavity, thereby generating a hydrostatic effect during the operation of the spindle.

[0008] The aforementioned deep and shallow cavity hydrostatic spindle structure is characterized in that: the sliding bearing is provided with four grooves, each groove corresponding to a hydrostatic cavity, the four grooves are used to guide lubricating oil into the four hydrostatic cavities, and the distribution of the hydrostatic cavities and shallow cavities enables the spindle to obtain uniform support force in all directions, thereby improving the operating rigidity of the spindle.

[0009] The deep and shallow cavity hydrostatic spindle structure is characterized in that: the thrust bearing is installed at one end of the spindle to bear the axial load of the spindle, and the thrust bearing works in conjunction with the sliding bearing to further enhance the stability of the spindle.

[0010] The aforementioned deep and shallow cavity hydrostatic spindle structure is characterized in that: the spindle and the sliding bearing, and the spindle and the thrust bearing are connected by high-precision fitting clearances to ensure the stability and rigidity of the spindle during operation, while reducing wear and heat generation.

[0011] The aforementioned deep and shallow cavity hydrostatic spindle structure is characterized in that: the connecting channel between the static cavity and the shallow cavity is provided with a flow control device for adjusting the flow rate of high-pressure oil, thereby achieving precise control of the hydrostatic effect.

[0012] The deep and shallow cavity hydrostatic pressure spindle structure is characterized in that: sealing devices are provided at both ends of the spindle to prevent high-pressure oil leakage, and the sealing devices adopt a multi-stage labyrinth seal structure to ensure the reliability and durability of the seal.

[0013] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a deep and shallow cavity hydrostatic spindle structure, including a sliding bearing with four grooves and four hydrostatic cavities, a thrust bearing, and a spindle. The hydrostatic cavities, through the introduction of high-pressure oil, form hydrostatic supports, enabling the spindle to maintain high rigidity and reduce vibration during operation. Four shallow cavities are connected to the hydrostatic cavities of the spindle; the synergistic effect of the hydrostatic cavities and the shallow cavities further enhances the rigidity of the spindle. When the spindle is subjected to impact loads during grinding, the high-pressure oil in the hydrostatic cavities is carried into the shallow cavities, generating a hydrodynamic effect. This hydrodynamic effect effectively resists the impact of the spindle grinding force, further improving the rigidity of the spindle. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the structure of this application.

[0016] Figure 2 This is a schematic diagram of a cross-section of a sliding bearing. Detailed Implementation

[0017] 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.

[0018] like Figure 1 , 2 As shown: A deep and shallow cavity hydrostatic spindle structure includes a spindle 1, a sliding bearing 2 and a thrust bearing 3. The sliding bearing is provided with four hydrostatic cavities 4, and each hydrostatic cavity is connected to a shallow cavity 5. The spindle generates a hydrostatic effect through the synergistic effect of the hydrostatic cavities and the shallow cavities to enhance the rigidity of the spindle and resist the impact of grinding forces.

[0019] The static pressure chamber is provided with static pressure support through a high-pressure oil source. The shallow cavity is connected to the static pressure chamber, so that the high-pressure oil in the static pressure chamber can flow into the shallow cavity, thereby generating a dynamic pressure effect during the operation of the spindle.

[0020] The sliding bearing has four grooves, each corresponding to a hydrostatic chamber. The four grooves are used to guide lubricating oil into the four hydrostatic chambers. The four hydrostatic chambers are located in the upper, lower, front, and rear directions, respectively. Each hydrostatic chamber is connected to a shallow cavity. The dynamic pressure effect generated by the oil in the spindle hydrostatic chamber being carried into the shallow cavity resists the impact of the spindle grinding force, thereby improving the rigidity of the spindle.

[0021] The depth of the static pressure chamber is 0.04 mm, and the depth of the shallow chamber is 0.02 mm.

[0022] The thrust bearing is installed at one end of the spindle to bear the axial load of the spindle. The thrust bearing works in conjunction with the sliding bearing to further enhance the stability of the spindle.

[0023] The spindle is connected to the sliding bearing and to the thrust bearing through high-precision fit clearances to ensure the stability and rigidity of the spindle during operation, while reducing wear and heat generation.

[0024] The connecting channel between the hydrostatic chamber and the shallow chamber is equipped with a flow control device to regulate the flow rate of high-pressure oil, thereby achieving precise control of the hydrodynamic effect. This ensures that the spindle maintains optimal hydrodynamic effect under different operating conditions, further improving the spindle's rigidity and stability. The introduction of the flow control device also allows the spindle to adapt to different grinding processes and load conditions, improving its versatility and adaptability.

[0025] Sealing devices are installed at both ends of the spindle to prevent high-pressure oil leakage. These sealing devices employ a multi-stage labyrinth seal structure to ensure the reliability and durability of the seal. This sealing device not only improves the reliability and durability of the spindle but also reduces environmental pollution and equipment failure caused by oil leakage. The multi-stage labyrinth seal structure design makes the sealing effect more reliable, further improving the operational stability of the spindle.

[0026] This invention significantly improves the spindle's operational rigidity by incorporating four hydrostatic chambers on the sliding bearing and connecting each chamber to a shallow cavity, utilizing the synergistic effect of hydrostatic and hydrodynamic pressure. This design allows the spindle to withstand greater impact forces during grinding, reducing vibration and wobbling caused by insufficient rigidity, thereby improving grinding stability and precision. The rational distribution of the hydrostatic and shallow cavities ensures the spindle maintains high stability during operation, further enhancing grinding quality. Furthermore, the introduction of a thrust bearing further enhances the spindle's axial stability, ensuring reliable operation under high loads.

[0027] Because of the significantly improved spindle rigidity, this invention effectively reduces vibration during the grinding process, thereby improving grinding efficiency and quality. Specifically, the high rigidity of the spindle makes the contact between the grinding wheel and the rolls more stable, reducing surface roughness and improving dimensional accuracy. Furthermore, the high rigidity allows for operation at higher grinding speeds, thus significantly improving production efficiency.

[0028] This invention, through an innovative deep-shallow cavity hydrostatic spindle structure design, significantly improves the spindle's operational rigidity, reduces vibration and wobbling during grinding, thereby enhancing grinding efficiency and quality. Optimized structural design, high-strength materials and precision machining, accurate control of the hydrostatic effect, and reliable sealing performance collectively ensure the spindle's stability and reliability in high-precision grinding. This design is particularly suitable for high-precision roll grinding, significantly improving production efficiency and product quality.

[0029] 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 deep-shallow cavity hydrostatic spindle structure, characterized in that: It includes a spindle, a sliding bearing, and a thrust bearing. The sliding bearing has four hydrostatic chambers, each of which is connected to a shallow cavity. The spindle generates a dynamic pressure effect through the synergistic effect of the hydrostatic chambers and the shallow cavities, thereby enhancing the rigidity of the spindle and resisting the impact of grinding forces.

2. The deep and shallow cavity hydrostatic spindle structure according to claim 1, characterized in that: The static pressure chamber is provided with static pressure support through a high-pressure oil source. The shallow cavity is connected to the static pressure chamber, so that the high-pressure oil in the static pressure chamber can flow into the shallow cavity, thereby generating a dynamic pressure effect during the operation of the spindle.

3. A deep-shallow cavity dynamic-static pressure spindle structure according to claim 1 or 2, characterized in that: The sliding bearing has four grooves, each corresponding to a hydrostatic chamber. The four grooves are used to guide lubricating oil into the four hydrostatic chambers. The distribution of the hydrostatic chambers and shallow chambers allows the spindle to obtain uniform support force in all directions, thereby improving the operating rigidity of the spindle.

4. The deep and shallow cavity hydrostatic spindle structure according to claim 1, characterized in that: The thrust bearing is installed at one end of the spindle to bear the axial load of the spindle. The thrust bearing works in conjunction with the sliding bearing to further enhance the stability of the spindle.

5. The deep and shallow cavity dynamic and static pressure spindle structure according to claim 1, characterized in that: The spindle is connected to the sliding bearing and to the thrust bearing through high-precision fit clearances to ensure the stability and rigidity of the spindle during operation, while reducing wear and heat generation.

6. The deep and shallow cavity hydrostatic spindle structure according to claim 3, characterized in that: The connection channel between the static pressure chamber and the shallow chamber is equipped with a flow control device to regulate the flow rate of high-pressure oil, thereby achieving precise control of the dynamic pressure effect.

7. The deep and shallow cavity hydrostatic spindle structure according to claim 1, characterized in that: The main shaft is equipped with sealing devices at both ends to prevent high-pressure oil leakage. The sealing devices adopt a multi-stage labyrinth seal structure to ensure the reliability and durability of the seal.

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