Hydraulic system of CNC grinding machine static pressure support and CNC grinding machine

Abstract

This application relates to the field of mechanical hydraulic technology, providing a hydrostatic bearing hydraulic system for a CNC grinding machine and a CNC grinding machine. The hydrostatic bearing hydraulic system for the CNC grinding machine includes: a bearing settling tank, with a first three-dimensional partition inside the settling tank dividing it into a first chamber and a second chamber that are interconnected at the top; a bearing hydraulic oil tank, adjacent to the settling tank, with a second three-dimensional partition inside the hydraulic oil tank dividing it into a third chamber and a fourth chamber that are interconnected at the top; a first hydraulic pump, located between the settling tank and the hydraulic oil tank; and an oil extraction assembly, one end of which is inserted into the fourth chamber, and the other end of which is connected to the hydrostatic bearing. This application provides a hydrostatic bearing hydraulic system for a CNC grinding machine that, through the coordinated operation of the settling tank, hydraulic oil tank, multi-stage partition, and circulating pump, achieves the dual functions of online oil-water separation and clean oil circulation.

Description

Technical Field

[0001] This application relates to the field of mechanical hydraulic technology, and more specifically, to a hydrostatic bearing hydraulic system for a CNC grinding machine and a CNC grinding machine. Background Technology

[0002] Currently, existing CNC grinding machines often use hydrostatic bearings as auxiliary supports when machining rolls. High-pressure hydraulic oil is continuously injected into the bearings, forming a load-bearing oil film between the bearing and the roll neck, allowing the roll to rotate in a non-contact, suspended manner. To ensure the bearing rigidity and machining accuracy of the bearings, the cleanliness and stability of the hydraulic system's oil are crucial. Existing hydrostatic bearing hydraulic systems mostly employ a single-tank circulation structure: hydraulic oil is pressurized by a pump and delivered to the bearings; after use, it returns directly to the tank via a return pipe, forming an open circulation. While this structure is simple and reliable, it has significant drawbacks in practical applications. The roll grinding process requires a large amount of coolant, creating a high-humidity water mist environment near the bearings. If the hydrostatic bearing's air supply and waterproofing system malfunctions, coolant can easily seep into the return pipe through the bearing gaps and mix with the hydraulic oil tank. Because water is heavier than oil and difficult to separate naturally, the water gradually accumulates in the circulation system, causing the hydraulic oil to emulsify and deteriorate. This reduces the oil film stiffness and leads to irregular fluctuations in bearing pressure, directly affecting the roundness and surface quality of the rolls. In severe cases, emulsified oil can accelerate hydraulic pump wear, clog precision throttling orifices, and cause equipment alarms or even shutdowns. Operators must frequently stop the machine to change the oil and clean the pipelines, which not only increases maintenance costs and oil consumption but also seriously affects the continuous operation efficiency of the rolling production line. Summary of the Invention

[0003] This application aims to at least solve the technical problem in the related art that the coolant of the hydrostatic bearing of the grinding machine can easily seep into the return oil line through the bearing gap and mix into the hydraulic oil tank. The mixed water gradually accumulates in the circulation system, causing the hydraulic oil to emulsify and deteriorate, the oil film stiffness to decrease, and the bearing pressure to fluctuate irregularly, affecting the processing roundness and surface quality of the roll.

[0004] To solve the above-mentioned technical problems, this application provides the following: Firstly, this application provides a hydrostatic bearing hydraulic system for a CNC grinding machine, comprising: a bearing settling tank, wherein a first three-dimensional partition is provided inside the bearing settling tank, dividing the bearing settling tank into a first chamber and a second chamber that are interconnected at the top; a settling tank drain outlet is provided at the bottom of the side wall of the bearing settling tank, and an oil outlet is provided on the side wall of the bearing settling tank; and a bearing hydraulic oil tank, disposed adjacent to the bearing settling tank, wherein a second three-dimensional partition is provided inside the bearing hydraulic oil tank, dividing the bearing hydraulic oil tank into a third chamber and a fourth chamber that are interconnected at the top; and a settling tank drain outlet is provided at the bottom of the side wall of the bearing hydraulic oil tank. The system includes a hydraulic oil tank drain outlet and an oil inlet on the side wall of the hydraulic oil tank. A first hydraulic pump is located between the sedimentation tank and the hydraulic oil tank, with its inlet and outlet connected, and its outlet connected to the inlet. An oil extraction assembly is also included, with one end inserted into the fourth chamber and the other end connected to the static pressure bearing, used to transport the separated hydraulic oil to the static pressure bearing. Vertically, the first three-dimensional partition is positioned higher than the oil outlet, the second three-dimensional partition is positioned higher than the oil inlet, and the suction port of the oil extraction assembly is positioned lower than the second three-dimensional partition.

[0005] This application provides a hydrostatic bearing hydraulic system for a CNC grinding machine. Through the coordinated operation of a sedimentation tank, hydraulic oil tank, multi-stage baffles, and a circulating pump, it achieves the dual functions of online oil-water separation and clean oil circulation. Specifically, in a single oil-water separation scenario, the bearing sedimentation tank is equipped with a first three-dimensional baffle, dividing the sedimentation tank into a first chamber and a second chamber that are interconnected at the top. Used hydraulic oil flows back to the first chamber via a return pipe. Because water is denser than hydraulic oil, the mixed water naturally settles to the bottom of the first chamber under gravity. The upper layer of oil overflows into the second chamber as the liquid level rises, passing over the top of the first three-dimensional baffle. A sedimentation tank drain outlet is located at the bottom of the sedimentation tank for periodically draining the accumulated water. The height of the first three-dimensional baffle is higher than the oil outlet height, ensuring that only the upper layer of oil, after initial sedimentation, can enter the second chamber and reach the oil outlet, effectively preventing the bottom water from being pumped into the next stage. In the oil transfer and secondary separation scenario, the inlet of the first hydraulic pump is connected to the outlet of the sedimentation tank, pumping the oil that has undergone initial sedimentation to the hydraulic oil tank of the torpedo. The hydraulic oil tank is internally equipped with a second three-dimensional baffle, dividing the tank into a third and fourth chamber, which are interconnected at the top. Oil enters the third chamber through the inlet, settles again, with remaining water continuing to sink, and the upper layer of oil overflowing over the top of the second three-dimensional baffle into the fourth chamber. A drain outlet is located at the bottom of the hydraulic oil tank to drain the accumulated water from the secondary sedimentation. The height of the second three-dimensional baffle is higher than the inlet height, ensuring the effectiveness of the secondary separation. In the clean oil output scenario, one end of the oil extraction assembly is inserted into the fourth chamber, with its suction port lower than the height of the second three-dimensional baffle, ensuring that the oil extraction assembly always extracts the upper clean oil after two sedimentation separations, avoiding disturbance to the bottom sedimentation area. The other end of the oil extraction assembly is connected to the inlet of the hydrostatic torpedo, re-delivering clean hydraulic oil to the torpedo for load-bearing circulation. Through the synergistic cooperation of the above structures, this application can still achieve online oil-water separation by relying on physical sedimentation and multi-stage overflow when the air supply and waterproofing system of the static pressure bearing fails. This effectively prevents hydraulic oil emulsification in the short to medium term, ensures stable system pressure and bearing capacity, significantly reduces the frequency of downtime for oil changes, lowers maintenance costs, and improves the continuous operation capability of the grinding machine and the quality of roll processing.

[0006] Secondly, this application proposes a CNC grinding machine, including: a hydrostatic bearing hydraulic system for a CNC grinding machine as described above.

[0007] The CNC grinding machine provided in this application, because it includes the hydrostatic bearing hydraulic system of the CNC grinding machine described above, has all the beneficial effects of the hydrostatic bearing hydraulic system of the CNC grinding machine, which will not be repeated here.

[0008] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the hydrostatic bearing hydraulic system of a CNC grinding machine according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the oil circuit circulation of the hydrostatic bearing hydraulic system of the CNC grinding machine in the embodiment shown.

[0010] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 CNC grinding machine hydrostatic bearing hydraulic system, 102 First chamber, 104 Second chamber, 106 Third chamber, 108 Fourth chamber, 110 Bearing sedimentation tank, 112 First three-dimensional partition, 113 Sedimentation tank drain, 114 First drain, 115 Second drain, 116 Oil outlet, 118 First water collection tank, 119 Second water collection tank, 120 Bearing hydraulic oil tank, 122 Second three-dimensional partition, 123 Hydraulic... 124 Oil tank drain outlet, 125 Third drain outlet, 126 Fourth drain outlet, 128 Oil inlet, 129 Third water collection tank, 120 Fourth water collection tank, 130 First hydraulic pump, 140 Oil extraction assembly, 142 Second hydraulic pump, 144 Oil inlet pipe, 145 Bell mouth, 146 Oil outlet pipe, 147 Filter screen, 148 Check valve, 149 Pressure gauge, 150 Oil return pipe, 152 Diffuser head, 154 Oil return hole, 200 Static pressure bearing. Detailed Implementation

[0011] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0013] The following reference Figure 1 and Figure 2 This application describes a hydrostatic bearing hydraulic system for a CNC grinding machine and a CNC grinding machine according to some embodiments thereof.

[0014] According to the first aspect of this application, Figure 1 and Figure 2As shown in the figure, an embodiment of this application provides a hydrostatic bearing hydraulic system 100 for a CNC grinding machine, comprising: a bearing settling tank 110, wherein a first three-dimensional partition 112 is provided inside the bearing settling tank 110, dividing the bearing settling tank 110 into a first chamber 102 and a second chamber 104 that are interconnected at the top; a settling tank drain outlet 113 is provided at the bottom of the side wall of the bearing settling tank 110; and an oil outlet 116 is provided on the side wall of the bearing settling tank 110; and a bearing hydraulic oil tank 120, disposed adjacent to the bearing settling tank 110, wherein a second three-dimensional partition 122 is provided inside the bearing hydraulic oil tank 120, dividing the bearing hydraulic oil tank 120 into a third chamber 106 and a fourth chamber 108 that are interconnected at the top; and a hydraulic oil tank drain outlet 116 is provided at the bottom of the side wall of the bearing hydraulic oil tank 120. 23. An oil inlet 126 is provided on the side wall of the hydraulic oil tank 120 of the trolley; a first hydraulic pump 130 is provided between the trolley sedimentation tank 110 and the hydraulic oil tank 120 of the trolley, the inlet of the first hydraulic pump 130 is connected to the oil outlet 116, and the outlet of the first hydraulic pump 130 is connected to the oil inlet 126; an oil extraction assembly 140 is provided, one end of which is inserted into the fourth chamber 108, and the other end of which is connected to the static pressure trolley 200, for conveying the separated hydraulic oil to the static pressure trolley 200; wherein, in the vertical direction, the setting height of the first three-dimensional partition 112 is higher than the setting height of the oil outlet 116, the setting height of the second three-dimensional partition 122 is higher than the setting height of the oil inlet 126, and the setting height of the oil suction port of the oil extraction assembly 140 is lower than the setting height of the second three-dimensional partition 122.

[0015] Specifically, such as Figure 1 and Figure 2As shown, the CNC grinding machine hydrostatic bearing hydraulic system 100 provided in the embodiments of this application includes a bearing settling tank 110, a bearing hydraulic oil tank 120, a first hydraulic pump 130, and an oil extraction assembly 140. The bearing settling tank 110 is internally provided with a first three-dimensional partition 112, which divides the bearing settling tank 110 into a first chamber 102 and a second chamber 104 that are interconnected at the top. A settling tank drain outlet 113 is provided at the bottom of the side wall of the bearing settling tank 110, and an oil outlet 116 is provided on the side wall of the bearing settling tank 110. The hydraulic oil tank 120 and the sedimentation tank 110 are arranged adjacent to each other, which can be understood as the hydraulic oil tank 120 and the sedimentation tank 110 being arranged horizontally. The hydraulic oil tank 120 has a second three-dimensional partition 122 inside, which divides the hydraulic oil tank 120 into a third chamber 106 and a fourth chamber 108 that are interconnected at the top. The bottom of the side wall of the hydraulic oil tank 120 has a hydraulic oil tank drain outlet 123, and the side wall of the hydraulic oil tank 120 has an oil inlet 126. A first hydraulic pump 130 is located between the sedimentation tank 110 and the hydraulic oil tank 120. The inlet and outlet of the first hydraulic pump 130 are connected to the oil outlet 116, and the outlet of the first hydraulic pump 130 is connected to the oil inlet 126, so as to draw oil from the second chamber 104 to the third chamber 106. One end of the oil extraction assembly 140 is inserted into the fourth chamber 108, and the other end of the oil extraction assembly 140 is connected to the static pressure bearing 200 to deliver the separated hydraulic oil to the static pressure bearing 200. In the vertical direction, the height of the first three-dimensional partition 112 is higher than the height of the oil outlet 116. That is, in the vertical direction, the distance from the top of the first three-dimensional partition 112 to the bottom of the Towal sedimentation tank 110 is greater than the distance from the top of the oil outlet 116 to the bottom of the Towal sedimentation tank 110. The height of the second three-dimensional partition 122 is higher than the height of the oil inlet 126. That is, in the vertical direction, the distance from the top of the second three-dimensional partition 122 to the bottom of the Towal hydraulic oil tank 120 is greater than the distance from the top of the oil inlet 126 to the bottom of the Towal hydraulic oil tank 120. And the height of the oil suction port of the oil extraction assembly 140 is lower than the height of the second three-dimensional partition 122. That is, in the vertical direction, the distance from the top of the oil suction port of the oil extraction assembly 140 to the bottom of the Towal hydraulic oil tank 120 is less than the distance from the top of the second three-dimensional partition 122 to the bottom of the Towal hydraulic oil tank 120. Of course, it can also be understood that, in the vertical direction, the top of the first three-dimensional partition 112 is located above the oil outlet 116, the top of the second three-dimensional partition 122 is located above the oil inlet 126, and the oil suction port of the oil extraction assembly 140 is located below the top of the second three-dimensional partition 122.

[0016] Thus, through the above structural design, this application achieves multi-stage static sedimentation and online oil-water separation of hydraulic oil. Specifically, the used hydraulic oil first flows back to the first chamber 102 of the Towal sedimentation tank 110. Utilizing the physical property that water is heavier than oil, the mixed water naturally settles to the bottom of the tank under gravity. The upper layer of oil overflows into the second chamber 104 as the liquid level rises, passing over the top of the first three-dimensional partition 112, achieving the initial oil-water separation. The first hydraulic pump 130 draws the upper layer of oil from the second chamber 104 into the third chamber 106 of the Towal hydraulic oil tank 120, where the oil settles again. The remaining water continues to sink, and the upper layer of oil overflows into the fourth chamber 108, passing over the top of the second three-dimensional partition 122, achieving the secondary oil-water separation. The oil suction port of the oil extraction assembly 140 is set below the top of the second three-dimensional partition 122 to ensure that the upper clean oil after two sedimentation separations in the fourth chamber 108 is always extracted, avoiding disturbance to the bottom sedimentation area. Through the coordinated operation of dual-box, multi-stage overflow, and height difference control, even when the static pressure trolley air supply waterproof system fails, it can still rely on purely physical methods to separate the water mixed in the hydraulic oil online, effectively preventing hydraulic oil emulsification in the short to medium term and ensuring system pressure stability and trolley load-bearing performance.

[0017] Compared with the prior art, the advantages of the hydrostatic bearing hydraulic system 100 for CNC grinding machines provided in this application are as follows: First, by setting up a bearing sedimentation tank 110 and a bearing hydraulic oil tank 120, and connecting the two through a first hydraulic pump 130, a closed-loop circulation path of oil return, primary sedimentation, transfer, secondary sedimentation, and clean oil output is realized. This achieves multi-stage static sedimentation of the return hydraulic oil, significantly improving the oil-water separation effect and solving the problem of ineffective water separation in the existing single-tank structure. Second, by limiting the height of the first three-dimensional partition 112 to be higher than the oil outlet 116, the height of the second three-dimensional partition 122 to be higher than the oil inlet 126, and the oil suction port of the oil extraction component 140 to be lower than the second three-dimensional partition 122, it is ensured that the upper clean oil after sedimentation can preferentially overflow to the next stage chamber, while the water at the bottom is effectively isolated and can be discharged through the drain outlet, avoiding disturbance to the sedimentation area during the extraction process and ensuring the cleanliness of the output oil. Third, this system adopts a purely physical separation method, which does not require additional air source or filter consumables. It can continue to work during the "vacuum period" when the air supply system fails, effectively maintaining the quality of the oil, greatly reducing the frequency of downtime and oil change due to hydraulic oil emulsification, reducing maintenance costs, and improving the continuous operation capability of the grinding machine and the quality of roll processing.

[0018] Specifically, currently, existing CNC grinding machines often use hydrostatic bearings as auxiliary supports when machining rolls. By continuously injecting high-pressure hydraulic oil into the bearings, a load-bearing oil film is formed between the bearing and the roll neck, enabling the roll to rotate in a non-contact, suspended manner. To ensure the bearing rigidity and machining accuracy of the bearings, the cleanliness and stability of the hydraulic system's oil are crucial. Existing hydrostatic bearing hydraulic systems mostly employ a single-tank circulation structure: hydraulic oil is pressurized by a pump and delivered to the bearings; after use, it returns directly to the tank via a return pipe, forming an open circulation. While this structure is simple and reliable, it has significant drawbacks in practical applications. A large amount of coolant is used during roll grinding, creating a high-humidity water mist environment near the bearings. If the hydrostatic bearing's air supply and waterproofing system malfunctions, coolant can easily seep into the return pipe through the bearing gaps and mix with the hydraulic oil tank. Because water is heavier than oil and difficult to separate naturally, the water gradually accumulates in the circulation system, causing the hydraulic oil to emulsify and deteriorate, reducing oil film stiffness, and resulting in irregular fluctuations in bearing pressure. This directly affects the roundness and surface quality of the rolls. In severe cases, emulsified oil can accelerate hydraulic pump wear, clog precision throttling orifices, and cause equipment alarms or even shutdowns. Operators need to frequently stop the machine to change the oil and clean the pipelines, which not only increases maintenance costs and oil consumption but also seriously affects the continuous operation efficiency of the rolling production line. Therefore, there is an urgent need for a hydrostatic bearing-specific hydraulic system that can separate water online and maintain oil cleanliness during the "vacuum period" of air supply failure, in order to improve the stability and reliability of grinding machine operation.

[0019] To address the shortcomings of existing technologies, such as Figure 1 and Figure 2As shown, this application provides a hydrostatic bearing hydraulic system 100 for a CNC grinding machine. Through the coordinated operation of a sedimentation tank, hydraulic oil tank, multi-stage baffles, and circulating pump, it achieves the dual functions of online oil-water separation and clean oil circulation. Specifically, in a single oil-water separation scenario, the bearing sedimentation tank 110 is equipped with a first three-dimensional baffle 112, dividing the sedimentation tank into a first chamber 102 and a second chamber 104 that are interconnected at the top. Used hydraulic oil flows back to the first chamber 102 via a return oil pipe 150. Because water is denser than hydraulic oil, the mixed water naturally settles to the bottom of the first chamber 102 under gravity. The upper layer of oil overflows into the second chamber 104 as the liquid level rises, passing over the top of the first three-dimensional baffle 112. A sedimentation tank drain outlet 113 is provided at the bottom of the sedimentation tank for periodically draining the accumulated water. The first three-dimensional partition 112 is positioned higher than the oil outlet 116, ensuring that only the upper layer of oil that has undergone initial sedimentation can enter the second chamber 104 and reach the oil outlet 116, effectively preventing the bottom water from being pumped into the next stage. In the oil transfer and secondary separation scenario, the inlet of the first hydraulic pump 130 is connected to the oil outlet 116 of the sedimentation tank, pumping the oil that has undergone initial sedimentation to the hydraulic oil tank 120. The hydraulic oil tank is equipped with a second three-dimensional partition 122, dividing the tank into a third chamber 106 and a fourth chamber 108 that are interconnected at the top. The oil enters the third chamber 106 from the inlet 126, settles again, and the remaining water continues to sink, while the upper layer of oil overflows over the top of the second three-dimensional partition 122 into the fourth chamber 108. The bottom of the hydraulic oil tank is equipped with a hydraulic oil tank drain outlet 123 for draining the water that has undergone secondary sedimentation. The second three-dimensional partition 122 is positioned at a height higher than the oil inlet 126, ensuring the effectiveness of secondary separation. In the clean oil output scenario, one end of the oil extraction assembly 140 is inserted into the fourth chamber 108, with its suction port positioned lower than the height of the second three-dimensional partition 122. This ensures that the oil extraction assembly 140 always extracts the upper clean oil after two sedimentation separations, avoiding disturbance to the bottom sedimentation zone. The other end of the oil extraction assembly 140 is connected to the inlet of the hydrostatic bearing pad, re-delivering clean hydraulic oil to the bearing pad for bearing cycle. Through the synergistic cooperation of the above structures, this application can still achieve online oil-water separation through physical sedimentation and multi-stage overflow when the air supply and waterproofing system of the hydrostatic bearing pad fails. This effectively prevents hydraulic oil emulsification in the short to medium term, ensuring system pressure stability and bearing pad bearing performance, significantly reducing downtime for oil changes, lowering maintenance costs, and improving the continuous operation capability of the grinding machine and the quality of roll processing.

[0020] Specifically, such as Figure 2 As shown in the figure, the arrows indicate the flow direction of hydraulic oil in the hydraulic system pipeline, that is, the circulation path of the hydraulic oil used in the hydrostatic bearing hydraulic system 100 of the CNC grinding machine in the pipeline.

[0021] In specific applications, the hydraulic oil used in the hydraulic system is either a fast oil-water separation hydraulic oil or a hydraulic oil with added oil-water separation additives. The choice can be made according to the specific actual use situation, and will not be listed here.

[0022] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the sedimentation tank drain outlet 113 includes: a first drain outlet 114, located at the bottom of the first chamber 102; and a second drain outlet 115, located at the bottom of the second chamber 104. The hydraulic oil tank drain outlet 123 includes: a third drain outlet 124, located at the bottom of the third chamber 106; and a fourth drain outlet 125, located at the bottom of the fourth chamber 108.

[0023] Specifically, such as Figure 1 and Figure 2 As shown, by further dividing the sedimentation tank drain outlet 113 into a first drain outlet 114 and a second drain outlet 115, and further dividing the hydraulic oil tank drain outlet 123 into a third drain outlet 124 and a fourth drain outlet 125, the purpose is to achieve independent discharge of water accumulated at the bottom of each chamber. Specifically, in the Towa sedimentation tank 110, the first drain outlet 114 is located on the bottom right side of the first chamber 102 to drain the water that initially settles from the return oil; the second drain outlet 115 is located on the bottom left side of the second chamber 104 to drain the residual water that settles again after overflowing into the second chamber 104. In the Towa hydraulic oil tank 120, the third drain outlet 124 is located on the bottom right side of the third chamber 106 to drain the water that settles again when the oil is left to stand in the third chamber 106; the fourth drain outlet 125 is located on the bottom left side of the fourth chamber 108 to drain any trace amounts of water that may overflow into the fourth chamber 108. By setting a dedicated drain outlet at the bottom of each independent chamber, operators can drain water according to the actual water accumulation in each chamber, avoiding the problem that a single drain outlet cannot cover multiple sedimentation areas and cause some water to remain undischarged, thus further improving the thoroughness of oil-water separation and the flexibility of drainage in the system.

[0024] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the bottom of the first chamber 102 is provided with a first water collection tank 118, and the bottom of the first water collection tank 114 is provided with the bottom of the first water collection tank 118; the bottom of the second chamber 104 is provided with a second water collection tank 119, and the bottom of the second water collection tank 119 is provided with the bottom of the second water collection tank 119; the bottom of the third chamber 106 is provided with a third water collection tank 128, and the bottom of the third water collection tank 128 is provided with the bottom of the third water collection tank 128; the bottom of the fourth chamber 108 is provided with a fourth water collection tank 129, and the bottom of the fourth water collection tank 125 is provided with the bottom of the fourth water collection tank 129.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, by setting water collection tanks at the bottom of each chamber and placing drain outlets at the bottom of the water collection tanks, this application further optimizes the collection and discharge effect of bottom water. Specifically, the first water collection tank 118 is located at the lowest point of the bottom of the first chamber 102, so that the water that has settled initially naturally collects in the water collection tank under the action of gravity. The first drain outlet 114 is located at the bottom of the first water collection tank 118 to ensure that the water can be completely drained and to prevent water from being dispersed and remaining in the flat-bottomed chamber. Similarly, the second water collection tank 119, the third water collection tank 128 and the fourth water collection tank 129 are respectively located at the bottom of the corresponding chambers, so that the water that has settled secondary or has a small amount of residual water in each chamber can be directionally collected to the lowest point and discharged through the corresponding drain outlet. This combination of chamber-based sedimentation and fixed-point collection in the water collection tank effectively solves the problem of dispersed bottom water in flat-bottomed oil tanks, making it difficult to completely drain. This ensures that each drainage operation can discharge the accumulated water from the system to the maximum extent, further reducing the risk of emulsification caused by long-term water accumulation in the oil and improving the system's oil-water separation efficiency and long-term operational reliability.

[0026] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, in the vertical direction, the height of the first three-dimensional partition 112 is 4mm to 6mm higher than the height of the oil outlet 116; the height of the second three-dimensional partition 122 is 4mm to 6mm higher than the height of the oil inlet 126, and the height of the oil suction port of the oil suction assembly 140 is 8mm to 12mm lower than the height of the second three-dimensional partition 122.

[0027] Specifically, such as Figure 1 and Figure 2As shown, by setting the height of the first three-dimensional partition 112 to be 4mm~6mm higher than the height of the oil outlet 116, it is ensured that when the upper layer of oil in the first chamber 102 overflows over the partition, a sufficiently thick settling layer is retained at the bottom, preventing the water deposited at the bottom from being rolled up and carried into the second chamber 104 during the overflow process; by setting the height of the second three-dimensional partition 122 to be 4mm~6mm higher than the height of the oil inlet 126, sufficient settling space is also retained in the third chamber 106, allowing residual water to settle fully before overflowing; by setting the height of the oil suction port of the oil extraction assembly 140 to be 8mm~12mm lower than the height of the second three-dimensional partition 122, it is ensured that the oil suction port is always located in the upper middle part of the upper clean oil area in the fourth chamber 108, so that clean oil that has been fully settled can be extracted, and the bottom sedimentation layer or water can be avoided due to the oil suction port being too low. Specifically, if the height difference is too small, the overflow will easily carry away water from the bottom; if the height difference is too large, the chamber volume will be ineffectively occupied, reducing the space utilization rate of the equipment. This application achieves an optimal balance between oil-water separation efficiency and oil storage volume within a limited space, significantly improving the separation stability and reliability of the system.

[0028] In specific applications, the height of the first three-dimensional partition 112 can be set 5mm higher than the height of the oil outlet 116, the height of the second three-dimensional partition 122 can be set 5mm higher than the height of the oil inlet 126, and the height of the oil suction port of the oil extraction assembly 140 can be set 10mm lower than the height of the second three-dimensional partition 122. Alternatively, the specific choice can be made according to the actual usage situation, which will not be listed here.

[0029] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the oil extraction assembly 140 includes: a second hydraulic pump 142, which has an inlet and an outlet; an oil inlet pipe 144, one end of which is connected to the inlet of the second hydraulic pump 142, and the other end of which extends into the fourth chamber 108, the other end of which is the oil suction port of the oil extraction assembly 140; and an oil outlet pipe 146, one end of which is connected to the outlet of the second hydraulic pump 142, and the other end of which is connected to the inlet of the hydrostatic bearing 200.

[0030] Specifically, such as Figure 1 and Figure 2As shown, the oil extraction assembly 140 includes a second hydraulic pump 142, an oil inlet pipe 144, and an oil outlet pipe 146. Specifically, one end of the oil inlet pipe 144 extends into the fourth chamber 108, and its end port is the oil suction port of the oil extraction assembly 140. The height of this oil suction port from the bottom of the hydraulic oil tank 120 is lower than the height of the top of the second three-dimensional partition 122 from the bottom of the hydraulic oil tank 120, ensuring that the clean oil that has undergone two sedimentation separations in the upper layer of the fourth chamber 108 is always extracted. The other end of the oil inlet pipe 144 is connected to the inlet of the second hydraulic pump 142. After the second hydraulic pump 142 is started, it generates negative pressure, which draws the clean oil through the oil inlet pipe 144. One end of the oil outlet pipe 146 is connected to the outlet of the second hydraulic pump 142, and the other end of the oil outlet pipe 146 is connected to the inlet of the hydrostatic bearing 200, which delivers the pressurized clean oil to the bearing for lubrication or oil sealing. By setting up a separate second hydraulic pump 142 as the power source for oil pumping, the problems of flow interference or pressure fluctuations caused by sharing power with the first hydraulic pump 130 are avoided. Meanwhile, the piping design of the inlet pipe 144 and outlet pipe 146 can be flexibly arranged according to the site space, without being limited by the relative positions of the sedimentation tank and the hydraulic oil tank. This design not only ensures stable oil pressure and sufficient flow delivered to the pump, but also allows the oil pumping assembly 140 to be maintained or replaced as an independent module, improving the system's modularity and maintenance convenience.

[0031] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the oil inlet pipe 144 has a flared end 145 extending into the fourth chamber 108, and a filter screen 147 is also provided on the oil inlet pipe 144, which covers the outside of the flared end 145.

[0032] Specifically, such as Figure 1 and Figure 2As shown, by providing a flared end 145 at one end of the oil inlet pipe 144 that extends into the fourth chamber 108, and covering the outside of the flared end 145 with a filter screen 147, this application achieves the dual functions of optimizing the flow rate of the sucked oil and preliminary filtration. Specifically, the flared end 145 has a flared structure, and its larger opening area can reduce the oil flow velocity at the inlet of the oil inlet pipe 144, avoiding the formation of local eddies near the oil suction port due to excessive suction, which would disturb the deposit layer at the bottom of the fourth chamber 108, thus ensuring the stability of the flow field during the oil suction process. At the same time, the flared end 145 increases the oil suction area, enabling the second hydraulic pump 142 to uniformly extract the upper clean oil at a lower flow rate, avoiding excessive local oil consumption caused by single-point oil suction. The filter screen 147 covers the outside of the bell mouth 145, physically intercepting the oil entering the oil inlet pipe 144. This effectively filters out any remaining small particulate impurities, fibers, or sludge, preventing these impurities from entering the second hydraulic pump 142 and the hydrostatic bearing, thus avoiding hydraulic pump wear, throttle hole blockage, or damage to the bearing's oil film. The combined design of the bell mouth 145 and the filter screen 147 ensures smooth oil suction and achieves online filtration, significantly improving the cleanliness of the oil delivered to the hydrostatic bearing, further reducing the risk of hydraulic system failure, and extending the service life of the hydraulic pump and bearing.

[0033] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the oil pumping assembly 140 also includes: a one-way valve 148, which is disposed on the oil outlet pipe 146 to prevent hydraulic oil backflow; and a pressure gauge 149, which is disposed on the oil outlet pipe 146 and located between the second hydraulic pump 142 and the one-way valve 148, for detecting the output oil pressure.

[0034] Specifically, such as Figure 1 and Figure 2As shown, by adding a one-way valve 148 and a pressure gauge 149 to the oil extraction assembly 140, this application achieves real-time monitoring of the pressure maintenance and operating status of the clean oil delivery pipeline. Specifically, the one-way valve 148 is installed on the oil outlet pipe 146, allowing oil to flow only from the outlet of the second hydraulic pump 142 to the static pressure bearing, while prohibiting reverse flow. When the second hydraulic pump 142 stops working, the one-way valve 148 immediately closes, preventing the high-pressure oil in the static pressure bearing 200 and its connecting pipeline from flowing back into the fourth chamber 108 or the interior of the second hydraulic pump 142 due to gravity or system back pressure. This avoids instantaneous pressure fluctuations in the oil caused by backflow, ensuring that the bearing oil film remains stable during shutdown; it also prevents impurities that may be carried out by backflow from contaminating the inlet pipe 144 and the upper clean oil zone of the fourth chamber 108. The pressure gauge 149 is installed on the oil outlet pipe 146 to detect the actual oil pressure output by the second hydraulic pump 142 in real time. Operators can visually assess the operating status of the oil extraction assembly 140 by observing the pressure gauge 149: if the pressure value is below the normal range, it may indicate blockage of the inlet pipe 144 filter 147, wear of the second hydraulic pump 142, or a system leak; if the pressure value rises abnormally, it may indicate blockage of the outlet pipe 146 or insufficient internal clearance of the static pressure bearing. Real-time monitoring with the pressure gauge 149 allows for timely detection and maintenance of faults in their early stages, preventing bearing failure or equipment damage due to abnormal oil pressure.

[0035] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, it also includes: a static pressure jack 200, which is equipped with a compressed air pipe and a flexible baffle; the other end of the oil extraction assembly 140 is connected to the liquid inlet of the static pressure jack 200 through a pipeline; and a return oil pipe 150, one end of which is connected to the liquid return port of the static pressure jack 200, and the other end of which is connected to the top of the jack sedimentation tank 110, for returning the used hydraulic oil to the first chamber 102 of the jack sedimentation tank 110.

[0036] Specifically, such as Figure 1 and Figure 2As shown, by combining the hydraulic system with a hydrostatic bearing with an air curtain or oil curtain waterproof structure, and setting up a return oil pipe 150 to form a complete circulation loop, a closed-loop control of the entire process from oil supply to use to oil return is achieved, forming a synergistic protection with existing waterproof technology. Specifically, the hydrostatic bearing 200 is equipped with a compressed air pipe and a flexible baffle. When the hydrostatic bearing 200 is working, the compressed air pipe sprays compressed air around the bearing to form an air curtain barrier, and the flexible baffle is in close contact with the roll surface, jointly preventing external coolant from entering the bearing's interior. The other end of the oil extraction assembly 140 is connected to the inlet of the hydrostatic bearing 200 through a pipeline, continuously delivering clean hydraulic oil extracted from the fourth chamber 108 to the bearing, forming a bearing oil film between the bearing and the roll neck. After use, the hydraulic oil flows out from the return port of the hydrostatic bearing 200, returns to the top of the bearing sedimentation tank 110 via the return oil pipe 150, and enters the first chamber 102 to begin a new round of oil-water separation circulation. Thus, when the hydrostatic bearing's air supply and waterproofing system is working normally, the air curtain and baffle plate effectively block external moisture, keeping the hydraulic oil clean at all times. When the air supply system malfunctions and causes waterproofing failure, a small amount of coolant seeps in and enters the sedimentation tank with the return oil. It is immediately captured and discharged by the system's multi-stage sedimentation and separation mechanism, preventing accumulation and emulsification in the circulation system. This improves the grinding machine's fault tolerance to air supply system failures and the reliability of continuous operation.

[0037] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the end of the return oil pipe 150 that extends into the Towa sedimentation tank 110 is provided with a diffuser head 152, and the diffuser head 152 is provided with multiple return oil holes 154 for uniformly dispersing the return oil into the first chamber 102.

[0038] Specifically, such as Figure 1 and Figure 2As shown, by setting a diffuser head 152 with multiple return oil holes 154 at one end of the return oil pipe 150 extending into the Towa sedimentation tank 110, this application achieves uniform dispersion and buffering of the returned hydraulic oil, effectively avoiding interference from the return oil impact on the oil-water stratification state in the sedimentation zone. Specifically, one end of the return oil pipe 150 is connected to the return port of the hydrostatic Towa, transporting the used hydraulic oil back to the Towa sedimentation tank 110. If the return oil directly rushes into the first chamber 102 at high speed in the form of a concentrated jet, it will violently disturb the oil in the chamber, re-rolling up the water that has settled to the bottom, disrupting the oil-water stratification process that is taking place in the first chamber 102, resulting in a decrease in separation efficiency. This application, by setting a diffuser head 152 at the end of the return oil pipe 150 and changing the original single oil outlet 116 to multiple return oil holes 154, transforms the return oil from a single-point concentrated spray to a multi-point uniform diffusion inflow. Multiple return oil holes 154 are distributed circumferentially or axially along the diffuser head 152, splitting a large stream of return oil into multiple smaller streams, significantly reducing the impact kinetic energy per unit area, allowing the return oil to fill the first chamber 102 slowly and steadily. Simultaneously, the structure of the diffuser head 152 extends the path of the return oil into the main liquid, further dissipating flow velocity energy. Through the aforementioned buffering and dispersing effects, the return oil does not disturb the bottom sedimentation zone when entering the first chamber 102, ensuring the stability of the oil-water interface on both sides of the first three-dimensional baffle 112, enabling the initial sedimentation process to proceed continuously and efficiently.

[0039] According to the second aspect of this application, such as Figure 1 As shown, a CNC grinding machine is also proposed, including: a CNC grinding machine hydrostatic bearing hydraulic system 100 as described in the above embodiment.

[0040] The CNC grinding machine provided in this application includes the CNC grinding machine hydrostatic bearing hydraulic system 100 of the above embodiment, and therefore has all the beneficial effects of the CNC grinding machine hydrostatic bearing hydraulic system 100, which will not be repeated here.

[0041] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0042] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 hydrostatic bearing hydraulic system for a CNC grinding machine, characterized in that, include: The Towa sedimentation tank has a first three-dimensional partition inside, which divides the Towa sedimentation tank into a first chamber and a second chamber that are interconnected at the top. The bottom of the side wall of the Towa sedimentation tank is provided with a sedimentation tank drain outlet, and an oil outlet is opened on the side wall of the Towa sedimentation tank. The Towa hydraulic oil tank is arranged adjacent to the Towa sedimentation tank. The Towa hydraulic oil tank is provided with a second three-dimensional partition, which divides the Towa hydraulic oil tank into a third chamber and a fourth chamber that are interconnected at the top. The bottom of the side wall of the Towa hydraulic oil tank is provided with a hydraulic oil tank drain outlet, and the side wall of the Towa hydraulic oil tank is provided with an oil inlet. A first hydraulic pump is installed between the Towa sedimentation tank and the Towa hydraulic oil tank. The inlet of the first hydraulic pump is connected to the oil outlet, and the outlet of the first hydraulic pump is connected to the oil inlet. An oil extraction assembly, one end of which is inserted into the fourth chamber, and the other end of which is connected to a hydrostatic bearing, for delivering the separated hydraulic oil to the hydrostatic bearing; In the vertical direction, the first three-dimensional partition is set at a height higher than the oil outlet, the second three-dimensional partition is set at a height higher than the oil inlet, and the oil suction port of the oil extraction assembly is set at a height lower than the second three-dimensional partition.

2. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 1, characterized in that, The sedimentation tank drain outlet includes: The first drain outlet is located at the bottom of the first chamber; The second drain outlet is located at the bottom of the second chamber; The hydraulic oil tank drain outlet includes: The third drain outlet is located at the bottom of the third chamber; The fourth drain outlet is located at the bottom of the fourth chamber.

3. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 2, characterized in that, The bottom of the first chamber is provided with a first water collection tank, and the first drain outlet is located at the bottom of the first water collection tank; The bottom of the second chamber is provided with a second water collection tank, and the second drain outlet is located at the bottom of the second water collection tank; The bottom of the third chamber is provided with a third water collection tank, and the third drain outlet is located at the bottom of the third water collection tank; The bottom of the fourth chamber is provided with a fourth water collection tank, and the fourth drain outlet is located at the bottom of the fourth water collection tank.

4. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 1, characterized in that, In the vertical direction, the height of the first three-dimensional partition is 4mm to 6mm higher than the height of the oil outlet; the height of the second three-dimensional partition is 4mm to 6mm higher than the height of the oil inlet; and the height of the oil suction port of the oil extraction assembly is 8mm to 12mm lower than the height of the second three-dimensional partition.

5. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 1, characterized in that, The oil extraction assembly includes: A second hydraulic pump, the second hydraulic pump having an inlet and an outlet; An oil inlet pipe is provided, with one end connected to the inlet of the second hydraulic pump and the other end extending into the fourth chamber. The other end of the oil inlet pipe is the oil suction port of the oil extraction assembly. An oil outlet pipe is provided, one end of which is connected to the outlet of the second hydraulic pump, and the other end of which is connected to the inlet of the hydrostatic bearing.

6. The hydrostatic bearing hydraulic system for a CNC grinding machine according to claim 5, characterized in that, The oil inlet pipe has a flared end that extends into the fourth chamber, and a filter screen is also provided on the oil inlet pipe, which covers the outside of the flared end.

7. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 5, characterized in that, The oil extraction assembly also includes: A check valve is installed on the oil outlet pipe to prevent hydraulic oil backflow; A pressure gauge is installed on the oil outlet pipe and located between the second hydraulic pump and the check valve to detect the output oil pressure.

8. The hydrostatic bearing hydraulic system for CNC grinding machines according to claim 1, characterized in that, Also includes: A static pressure bearing, wherein the static pressure bearing is equipped with a compressed air pipe and a flexible water baffle; The other end of the oil pumping assembly is connected to the inlet of the hydrostatic tumbler via a pipeline; The return oil pipe has one end connected to the return port of the hydrostatic jack and the other end connected to the top of the jack sedimentation tank, and is used to return the used hydraulic oil to the first chamber of the jack sedimentation tank.

9. The hydrostatic bearing hydraulic system for a CNC grinding machine according to claim 8, characterized in that, The end of the oil return pipe that extends into the Towa sedimentation tank is equipped with a diffuser head, and the diffuser head has multiple oil return holes for uniformly dispersing the oil return into the first chamber.

10. A CNC grinding machine, characterized in that, Includes the hydrostatic bearing hydraulic system for CNC grinding machines as described in any one of claims 1 to 9.

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