Dynamic and static pressure main shaft for high-speed grinding scene

Abstract

The utility model discloses a dynamic-static pressure main shaft for a high-speed grinding scene, and particularly relates to the field of dynamic-static pressure main shafts, the dynamic-static pressure main shaft comprises a shell, a motor is fixedly installed on the left side in the shell, the output end of the motor is fixedly connected with a main shaft body, and the left end of the outer side of the main shaft body is connected with the interior of the shell through a rear bearing. The first cooling fin is started through an external power source, the first cooling fin absorbs the temperature of lubricating oil in the refrigeration pipeline, then hot air is exhausted through the cooling fan arranged on the first cooling fin, the refrigeration pipeline is in an S shape, the path of the whole pipeline is long, and therefore the flowing time of the lubricating oil in the refrigeration pipeline is long. The cooling effect of the first cooling fins on the lubricating oil in the refrigeration pipeline is matched, the cooling duration of the lubricating oil can be guaranteed, the lubricating oil output by the pump body can be kept at a low temperature, and therefore the cooling effect of the lubricating oil on the bearing is enhanced, and the continuous and effective cooling effect on the connecting position of the bearing and the main shaft is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrostatic and hydrodynamic spindles, in particular to a hydrostatic and hydrodynamic spindle for high-speed grinding scenarios. Background Technique

[0002] A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios is designed specifically to meet the requirements of high-speed and high-precision grinding. The hydrostatic and hydrodynamic spindle realizes wear-free sliding through oil film support, can maintain extremely high rotational accuracy during high-speed operation, thereby ensuring the accuracy of grinding processing. The hydrostatic and hydrodynamic spindle adopts an oil cavity structure and a throttle, and supports the spindle through a pressure oil film, with strong load-bearing capacity, and is suitable for working conditions such as heavy loads and heavy cutting.

[0003] During the operation of the hydrostatic and hydrodynamic spindle, a large amount of heat will be generated at the connection between the spindle body and the bearing, and part of the heat will be carried out by the lubricating oil flowing in the bearing, playing a heat dissipation effect. However, the lubricating oil is recycled. Under the long-term operation of the spindle body, as the temperature rises, the viscosity of the lubricating oil will be significantly reduced, which will affect the thickness and stability of its lubricating film, and further affect the lubrication effect of the bearing. After being recycled multiple times, the temperature of the lubricating oil inside the fuel tank will be relatively high, so the lubricating oil at a relatively high temperature has a poor cooling effect on the bearing. Therefore, the inventor provides a hydrostatic and hydrodynamic spindle for high-speed grinding scenarios to solve the problems raised in the above background technique. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydrostatic and hydrodynamic spindle for high-speed grinding scenarios, achieving a continuous and effective heat dissipation effect at the connection between the bearing and the spindle.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios includes a housing. A motor is fixedly installed on the left side inside the housing. The output end of the motor is fixedly connected to a spindle body. The left end of the outer side of the spindle body is connected to the inside of the housing through a rear bearing, and the right end of the outer side of the spindle body is connected to the inside of the housing through a front bearing. An oil delivery mechanism is arranged inside the housing. The oil delivery mechanism includes turning grooves opened on the upper and lower sides of the housing. The turning grooves include a horizontal section and a vertical section. The horizontal section penetrates through the left end of the housing. The inner side of the vertical section of the turning groove is fixedly communicated with a U-shaped groove. The two ends of the bottom of the U-shaped groove penetrate through the bottom of the housing, and the two ends of the bottom of the U-shaped groove correspond to the oil inlets of the front bearing and the rear bearing. The left side of the upper turning groove is fixedly connected with an input pipe for injecting oil, and the left side of the bottom turning groove is fixedly communicated with a discharge pipe.

[0007] As a further solution of the utility model: a fuel tank is fixedly communicated with the left side of the discharge pipe, a refrigeration pipeline is fixedly communicated with the top of the fuel tank, an installation frame is fixedly connected to the rear side of the fuel tank, a pump body is fixedly connected to the top of the installation frame, the input end of the pump body is fixedly connected with the refrigeration pipeline, and the output end of the pump body is fixedly connected with the input pipe; a filtering mechanism is arranged inside the fuel tank.

[0008] As a further solution of the utility model: the refrigeration pipeline is in an "S" shape, and a first heat sink is fixedly connected to the top of the refrigeration pipeline.

[0009] As a further solution of the utility model: a flow valve is installed on the input pipe.

[0010] As a further solution of the utility model: second heat sinks are respectively arranged on the upper and lower sides of the housing, and the second heat sinks are in a shape that fits the surface of the housing.

[0011] As a further solution of the utility model: a filtering mechanism is arranged on the right side inside the fuel tank. The filtering mechanism includes a connecting ring fixedly connected to the right side of the fuel tank. Thread grooves are formed on the outer side of the connecting ring. A filter is arranged on the left side of the connecting ring. The filter includes a connecting section. Thread grooves are formed on the inner side of the connecting section. The filter is fixed together with the connecting ring by being screwed with the connecting ring through the connecting section; a filter screen is fixedly connected to the left side of the connecting section. The filter screen is designed in a hemispherical shape and has a large filtering area, thereby improving the filtering efficiency; a tank cover is arranged on the right side of the top of the fuel tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] For the hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios, the first heat sink is started through an external power supply. The first heat sink absorbs the temperature of the lubricating oil inside the refrigeration pipeline, and then discharges the hot air through the self-provided cooling fan. The refrigeration pipeline is in an "S" shape, so that the overall pipeline path is longer, and thus the flow time of the lubricating oil inside the refrigeration pipeline is also longer. Combined with the heat dissipation of the first heat sink for the lubricating oil inside the refrigeration pipeline, the heat dissipation duration of the lubricating oil can be ensured, so that the lubricating oil output by the pump body can be maintained at a relatively low temperature, thereby enhancing the heat dissipation effect of the lubricating oil on the bearing, and further achieving a continuous and effective heat dissipation effect on the connection between the bearing and the spindle.

[0014] In addition, for the hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios, when the lubricating oil runs in the bearings, it will contaminate some dust. If the dust is not filtered, it will affect the lubrication effect of the subsequent lubricating oil. Therefore, when the lubricating oil is input into the oil tank through the discharge pipe, the internal dust will be filtered by the filter screen to ensure the quality of the lubricating oil. The filter can be disassembled and installed from the connecting ring, which is convenient for cleaning the filter screen after opening the box cover. Thus, the effect of filtering during the lubricating oil circulation process is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic diagram of the overall structure of a hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios;

[0016] Figure 2 FIG. is a schematic sectional structure diagram of the housing in a hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios;

[0017] Figure 3 FIG. is a schematic diagram of the oil delivery mechanism structure in a hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios;

[0018] Figure 4 FIG. is a schematic sectional view of the filtering mechanism in a hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios;

[0019] In the figure: 10, housing; 11, motor; 12, spindle body; 13, rear bearing; 14, front bearing; 20, oil delivery mechanism; 201, turning groove; 202, U-shaped groove; 203, input pipe; 204, pump body; 205, refrigeration pipeline; 206, first heat sink; 207, oil tank; 208, discharge pipe; 209, flow valve; 210, mounting bracket; 30, filtering mechanism; 301, connecting ring; 302, filter; 3021, connecting section; 3022, filter screen; 305, box cover; 40, second heat sink. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] As Figure 1 、 2 shown, a hydrostatic and hydrodynamic spindle used in high-speed grinding scenarios includes a housing 10. A motor 11 is fixedly installed on the left side inside the housing 10. The output end of the motor 11 is fixedly connected to a spindle body 12. The left end of the outer side of the spindle body 12 is connected to the inside of the housing 10 through a rear bearing 13, and the right end of the outer side of the spindle body 12 is connected to the inside of the housing 10 through a front bearing 14.

[0022] In use, the motor 11 is started by an external power supply. The output end of the motor 11 drives the main shaft body 12 to rotate, and at the same time, the main shaft body 12 rotates inside the rear bearing 13 and the front bearing 14. When the outer end of the main shaft body 12 is connected to a tool for grinding or cutting, the tool is driven to rotate by the high-speed rotating main shaft body 12 to grind or cut a target object.

[0023] During the above grinding or cutting process, since the main shaft body 12 is connected to the bearing and rotates for a long time, the connection between the main shaft body 12 and the bearing will be worn due to abrasion, making it difficult to ensure the accuracy of grinding processing. Therefore, an oil supply mechanism 20 is proposed.

[0024] Reference Figure 1 、 2 The oil supply mechanism 20 includes turning grooves 201 formed on the upper and lower sides of the housing 10. The turning grooves 201 include a horizontal section and a vertical section, and the horizontal section penetrates the left end of the housing 10. A U-shaped groove 202 is fixedly communicated with the inner side of the vertical section of the turning groove 201. The two ends of the bottom of the U-shaped groove 202 penetrate the bottom of the housing 10, and the two ends of the bottom of the U-shaped groove 202 correspond to the oil inlets of the front bearing 14 and the rear bearing 13. An injectable input pipe 203 is fixedly connected to the left side of the top turning groove 201, and a discharge pipe 208 is fixedly communicated with the left side of the bottom turning groove 201.

[0025] Specifically, a fuel tank 207 is fixedly communicated with the left side of the discharge pipe 208. A refrigeration pipe 205 is fixedly communicated with the top of the fuel tank 207. An installation frame 210 is fixedly connected to the rear side of the fuel tank 207. A pump body 204 is fixedly connected to the top of the installation frame 210. The input end of the pump body 204 is fixedly connected to the refrigeration pipe 205, and the output end of the pump body 204 is fixedly connected to the input pipe 203.

[0026] In use, the pump body 204 is started by an external power supply. The pump body 204 extracts the lubricating oil inside the fuel tank 207 through the refrigeration pipe 205 at the input end, and then transports it into the top turning groove 201 through the input pipe 203. After being split by the U-shaped groove 202, it is respectively transported into the front bearing 14 and the rear bearing 13 through the bearing oil inlets. The lubricating oil flows in the bearing clearance under the combined action of oil pressure and journal rotation to form an oil film. The oil film not only plays a lubricating role but also bears part of the external load, helping to lift the main shaft and keep it in a fully hydrodynamic lubrication state. At the same time, the lubricating oil will absorb part of the heat at the connection between the main shaft body 12 and the bearing. Finally, the lubricating oil converges into the lower turning groove 201 through the lower U-shaped groove 202 and is finally discharged into the fuel tank 207 through the discharge pipe 208.

[0027] Furthermore, the refrigeration pipeline 205 is in an "S" shape, and a first heat sink 206 is fixedly connected to the top of the refrigeration pipeline 205. Since the lubricating oil absorbs some heat of the bearing during operation, after being recycled multiple times, the temperature of the lubricating oil inside the fuel tank 207 will be relatively high. As a result, the lubricating oil at a relatively high temperature has a poor cooling effect on the bearing. To ensure the heat dissipation effect of the lubricating oil on the bearing, therefore, during use, the first heat sink 206 is started by an external power supply. The first heat sink 206 absorbs the temperature of the lubricating oil inside the refrigeration pipeline 205, and then discharges the hot air through its own cooling fan. The refrigeration pipeline 205 is in an "S" shape, making the path of the overall pipeline longer. Thus, the flow time of the lubricating oil inside the refrigeration pipeline 205 is also longer. Coupled with the heat dissipation of the first heat sink 206 to the lubricating oil inside the refrigeration pipeline 205, the heat dissipation duration of the lubricating oil can be ensured, so that the lubricating oil output by the pump body 204 can be maintained at a relatively low temperature, enhancing the heat dissipation effect of the lubricating oil on the bearing.

[0028] Furthermore, a flow valve 209 is installed on the input pipe 203; since the rotational speed of the main shaft body 12 is not constant, when the main shaft body 12 rotates relatively fast, it is necessary to increase the input lubricating oil measurement, and when the main shaft body 12 rotates relatively slowly, it is necessary to slow down the input lubricating oil measurement. Therefore, during use, the input amount of lubricating oil can be controlled by the flow valve 209.

[0029] Furthermore, second heat sinks 40 are respectively arranged on the upper and lower sides of the housing 10. The second heat sinks 40 are in a shape that fits the surface of the housing 10. During use, the second heat sinks 40 absorb the heat dissipated at the connection of the two bearings inside the housing 10, preventing the large amount of heat at the bearings from affecting the rotation of the main shaft body 12.

[0030] Reference Figure 3 、 4 , a filtering mechanism 30 is arranged on the right side inside the fuel tank 207. The filtering mechanism 30 includes a connection ring 301 fixedly connected to the right side of the fuel tank 207. Thread grooves are provided on the outer side of the connection ring 301. A filter 302 is arranged on the left side of the connection ring 301. The filter 302 includes a connection section 3021. Thread grooves are provided on the inner side of the connection section 3021. The filter 302 is fixed together with the connection ring 301 by being threadedly connected through the connection section 3021; a filter net 3022 is fixedly connected to the left side of the connection section 3021. The filter net 3022 is designed in a hemispherical shape and has a large filtering area, thereby improving the filtering efficiency; a tank cover 305 is arranged on the upper right side of the fuel tank 207.

[0031] During use, when the lubricating oil runs in the bearing, it will contaminate some dust. If the dust is not filtered, it will affect the subsequent lubricating effect of the lubricating oil. Therefore, when the lubricating oil is input into the interior of the fuel tank 207 through the discharge pipe 208, the dust inside is filtered by the filter screen 3022 to ensure the quality of the lubricating oil. The filter 302 can be disassembled and installed from the connecting ring 301, facilitating the cleaning of the filter screen 3022 after opening the tank cover 305.

[0032] The working principle of the present utility model is as follows: The first heat sink 206 is started by an external power supply. The first heat sink 206 absorbs the temperature of the lubricating oil inside the refrigeration pipeline 205, and then discharges the hot air through its own cooling fan. The refrigeration pipeline 205 is in an "S" shape, making the overall pipeline path longer. As a result, the flow time of the lubricating oil inside the refrigeration pipeline 205 is also longer. Combining with the heat dissipation of the first heat sink 206 to the lubricating oil inside the refrigeration pipeline 205, it can ensure the heat dissipation duration of the lubricating oil, enabling the lubricating oil output by the pump body 204 to maintain a relatively low temperature and enhancing the heat dissipation effect of the lubricating oil on the bearing.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios, comprising a housing (10). Inside the left side of the housing (10), a motor (11) is fixedly installed. The output end of the motor (11) is fixedly connected to a spindle body (12). The left end of the outer side of the spindle body (12) is connected to the inside of the housing (10) through a rear bearing (13). The right end of the outer side of the spindle body (12) is connected to the inside of the housing (10) through a front bearing (14). An oil supply mechanism (20) is arranged inside the housing (10), characterized in that, The oil delivery mechanism (20) includes turning grooves (201) formed on the upper and lower sides of the housing (10). The turning grooves (201) include a horizontal section and a vertical section, and the horizontal section penetrates through the left end of the housing. A U-shaped groove (202) is fixedly communicated with the inner side of the vertical section of the turning groove (201). The two ends of the bottom of the U-shaped groove (202) penetrate through the bottom of the housing (10), and the two ends of the bottom of the U-shaped groove (202) correspond to the oil inlet positions of the front bearing (14) and the rear bearing (13). An injectable input pipe (203) is fixedly connected to the left side of the turning groove (201) at the top, and a discharge pipe (208) is fixedly communicated with the left side of the turning groove (201) at the bottom.

2. The hydrostatic and hydrodynamic spindle for high-speed grinding scenarios according to claim 1, wherein A fuel tank (207) is fixedly communicated with the left side of the discharge pipe (208). A refrigeration pipe (205) is fixedly communicated with the top of the fuel tank (207). An installation frame (210) is fixedly connected to the rear side of the fuel tank (207). A pump body (204) is fixedly connected to the top of the installation frame (210). The input end of the pump body (204) is fixedly connected to the refrigeration pipe (205), and the output end of the pump body (204) is fixedly connected to the input pipe (203). A filtering mechanism (30) is arranged inside the fuel tank (207).

3. A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios according to claim 2, characterized in that, The refrigeration pipe (205) is in an "S" shape, and a first heat sink (206) is fixedly connected to the top of the refrigeration pipe (205).

4. A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios according to claim 1, characterized in that, A flow valve (209) is installed on the input pipe (203).

5. A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios according to claim 1, characterized in that, Second heat sinks (40) are respectively arranged on the upper and lower sides of the housing (10), and the second heat sinks (40) are in a shape that fits the surface of the housing (10).

6. A hydrostatic and hydrodynamic spindle for high-speed grinding scenarios according to claim 2, characterized in that, A filtering mechanism (30) is arranged on the right side inside the fuel tank (207). The filtering mechanism (30) includes a connection ring (301) fixedly connected to the right side of the fuel tank (207). A thread groove is formed on the outer side of the connection ring (301). A filter (302) is arranged on the left side of the connection ring (301). The filter (302) includes a connection section (3021). A thread groove is formed on the inner side of the connection section (3021). The filter (302) is fixed together with the connection ring (301) by screwing the connection section (3021) with the thread groove of the connection ring (301). A filter net (3022) is fixedly connected to the left side of the connection section (3021). The filter net (3022) is designed in a hemispherical shape and has a large filtering area, thereby improving the filtering efficiency. A tank cover (305) is arranged on the upper right side of the fuel tank (207).

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