Throttling control method and device for hydrostatic bearing

Abstract

The invention discloses a throttling control method and device for a hydrostatic bearing, and the method comprises the steps: S1, setting control parameters of an electromagnetic valve controller, and the control parameters comprise a preset pressure value and a preset rotating speed value; s2, the actual rotating speed and the actual oil cavity pressure of the hydrostatic bearing are read through a sensor, and the external load of the hydrostatic bearing is calculated according to the actual oil cavity pressure; s3, a control mode of an electromagnetic valve controller is determined according to the size relation between the actual rotating speed and the preset rotating speed value and the size relation between the external load and the preset pressure value; and S4, an electromagnetic valve is controlled by the electromagnetic valve controller to be connected with a throttler corresponding to the control mode so as to adjust the load interval of the hydrostatic bearing. According to the throttling control method and device for the hydrostatic bearing, the problems that the bearing capacity range of the hydrostatic bearing is limited, and the bearing capacity is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-precision machining machine tools, and in particular to a hydrostatic bearing throttling control method and device. Background Art

[0002] At present, hydrostatic bearings mainly use throttles to adjust oil pressure and flow to improve the bearing's load-bearing capacity. Existing throttles mainly include fixed throttles and variable throttles. The liquid resistance of the fixed throttle remains unchanged during the bearing operation and cannot be flexibly adjusted when facing different loads, which makes the hydrostatic bearing with fixed throttles have a low load-bearing capacity. Variable throttles include film feedback throttles, etc., which can adjust the liquid resistance by deforming the metal film, but are limited by the material properties of the metal film and the degree of deformation under pressure is limited. Therefore, the load-bearing capacity range of the liquid hydrostatic bearing is also limited, resulting in a low load-bearing capacity of the hydrostatic bearing. Summary of the invention

[0003] The main purpose of the present invention is to provide a throttling control method and device for a hydrostatic bearing, so as to at least solve the problem that the load-bearing capacity range of the hydrostatic bearing is also limited and the load-bearing capacity is low.

[0004] According to one aspect of the present invention, a hydrostatic bearing throttling control method is provided, comprising:

[0005] Step S1: setting control parameters of the solenoid valve controller, wherein the control parameters include a preset pressure value and a preset speed value;

[0006] Step S2: reading the actual rotation speed and the actual oil chamber pressure of the hydrostatic bearing through a sensor, and calculating the external load of the hydrostatic bearing according to the actual oil chamber pressure;

[0007] Step S3: determining a control mode of the solenoid valve controller according to a magnitude relationship between the actual speed and the preset speed value and a magnitude relationship between the external load and the preset pressure value;

[0008] Step S4: controlling the solenoid valve through the solenoid valve controller to connect the throttle corresponding to the control mode to adjust the load range of the hydrostatic bearing.

[0009] Further, the control mode includes a first control mode and a second control mode, the first control mode is configured to control the solenoid valve and the first throttle to be connected through the solenoid valve controller, and the second control mode is configured to control the solenoid valve and the second throttle to be connected through the solenoid valve controller.

[0010] Furthermore, the step S3 comprises:

[0011] Step S31: determining the magnitude relationship between the actual rotation speed and the preset rotation speed value, and the magnitude relationship between the external load and the preset pressure value;

[0012] Step S32: If the actual speed is not greater than the preset speed value and the external load is not greater than the preset pressure value, switching the control mode of the solenoid valve controller to the first control mode;

[0013] Step S33: If the actual speed is greater than the preset speed value or the external load is greater than the preset pressure value, the control mode of the solenoid valve controller is switched to the second control mode.

[0014] Further, the load interval includes a first load interval and a second load interval, the first load interval is configured as [a, b], and the second load interval is configured as (b, c], wherein a<b<c, and the step S4 includes:

[0015] Step S41: when the solenoid valve controller is in the first control mode, the solenoid valve controller is used to control the solenoid valve to communicate with the first throttle, so as to adjust the load range of the hydrostatic bearing to the first load range;

[0016] Step S42: when the solenoid valve controller is in the second control mode, the solenoid valve controller controls the solenoid valve to communicate with the second throttle, so as to adjust the load range of the hydrostatic bearing to the second load range.

[0017] Further, the external load is calculated by multiplying the actual oil chamber pressure read by the sensor by the effective area of ​​the oil chamber. The calculation formula of the external load is:

[0018] F=P1×Ae1-P2×Ae2, where: F represents the external load of the hydrostatic bearing, P1 represents the pressure on the high-pressure side of the oil chamber, P2 represents the pressure on the low-pressure side of the oil chamber, Ae1 represents the effective area on the high-pressure side of the oil chamber, and Ae2 represents the effective area on the low-pressure side of the oil chamber.

[0019] According to another aspect of the present invention, a hydrostatic bearing throttling control device is further provided, wherein the hydrostatic bearing throttling control device is at least used to execute the aforementioned hydrostatic bearing throttling control method, and the hydrostatic bearing throttling control device comprises:

[0020] A turntable assembly, wherein the turntable assembly is provided with a hydrostatic bearing and a sensor, wherein the sensor is used to read an actual rotation speed and an actual oil chamber pressure of the hydrostatic bearing;

[0021] A control component, the control component comprising a solenoid valve controller and a solenoid valve, the solenoid valve controller is electrically connected to the sensor, and the solenoid valve is electrically connected to the solenoid valve controller;

[0022] A throttling assembly, the throttling assembly includes a first throttle and a second throttle, the first throttle is respectively connected to the solenoid valve and the oil filling port of the turntable assembly, and the second throttle is respectively connected to the solenoid valve and the oil filling port of the turntable assembly.

[0023] Furthermore, the first throttle and the second throttle both include variable throttles, and the fluid resistance of the variable throttle changes with the external load of the hydrostatic bearing.

[0024] Further, the variable throttle includes a film feedback throttle, the film feedback throttle includes a throttle upper cover, a metal film and a throttle body, the throttle body is provided with a groove, the throttle upper cover is covered in the groove, the metal film is arranged in the groove to form an adjustment chamber and a pressure stabilizing chamber that are not connected to each other, the adjustment chamber is located between the bottom of the groove and the metal film, and the pressure stabilizing chamber is located between the metal film and the throttle upper cover; the throttle body is provided with a throttle platform, an oil inlet, a first flow channel, and a second flow channel. , a first flow channel, a second flow channel, a main oil port and an oil outlet, the throttle platform is located in the pressure stabilizing chamber, the throttle platform is provided with a throttle platform oil port, the oil inlet is communicated with the first flow channel port and the second flow channel port respectively, the second flow channel port is communicated with the regulating chamber; the first flow channel port is communicated with the first flow channel, the first flow channel is communicated with the pressure stabilizing chamber and the second flow channel respectively, the pressure stabilizing chamber is communicated with the throttle platform oil port, the throttle platform oil port is communicated with the oil outlet, the second flow channel is communicated with the main oil port, the main oil port is communicated with the oil outlet;

[0025] The film feedback throttle is configured as follows:

[0026] When the oil outlet is not connected to a load, the metal film is deformed by the pressure of the regulating chamber to reduce the volume of the pressure stabilizing chamber, thereby controlling the flow rate of the oil outlet to decrease;

[0027] When the oil outlet is connected to a load, the metal film is deformed by the pressure of the pressure stabilizing chamber to increase the volume of the pressure stabilizing chamber, thereby controlling the increase in the flow rate of the oil outlet.

[0028] Further, the solenoid valve includes a two-position three-way solenoid valve, which is provided with a first oil inlet, a first oil outlet and a second oil outlet, the first oil inlet is connected to the oil tank, the first oil outlet is connected to the first throttle, and the second oil outlet is connected to the second throttle, and when the solenoid valve controller is in a first control mode, the first oil inlet is connected to the first oil outlet, and when the solenoid valve controller is in a second control mode, the first oil inlet is connected to the second oil outlet.

[0029] Furthermore, the sensor includes a speed sensor and a pressure sensor, the speed sensor and the pressure sensor are respectively arranged on the hydrostatic bearing, the speed sensor is used to read the actual speed of the hydrostatic bearing, and the pressure sensor is used to read the actual oil chamber pressure of the hydrostatic bearing.

[0030] In the present invention, by integrating a speed sensor and a pressure sensor, the actual speed and oil chamber pressure information of the hydrostatic bearing can be obtained in real time and accurately as a control reference of the solenoid valve controller, so that the system can quickly respond to changes in the working state of the bearing and ensure that the bearing is always in the best working state. According to the actual speed and oil chamber pressure read by the sensor, the external load of the hydrostatic bearing is calculated according to the oil chamber pressure, and the control mode of the solenoid valve controller is automatically switched according to the comparison result between the external load and the actual speed and the preset value. This adaptive control method enables the system to automatically adjust the selection of the throttle according to the change of working conditions, thereby optimizing the lubrication effect and load-bearing capacity of the bearing. By defining different load intervals and adjusting the load interval of the bearing according to the actual working conditions, the present application realizes the fine control of the bearing performance. The optimization of the load interval not only improves the bearing capacity and stability, but also extends the service life of the bearing and reduces the failure rate. By accurately controlling the flow direction and flow rate of the oil, unnecessary energy waste is avoided. When the bearing does not need too much lubrication or load-bearing capacity, the supply of oil can be automatically reduced, thereby reducing energy consumption and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 It is a structural schematic diagram of a hydrostatic bearing throttling control device disclosed in an embodiment of the present invention;

[0033] Figure 2 It is an exploded schematic diagram of a membrane feedback throttle disclosed in an embodiment of the present invention;

[0034] Figure 3 The figure shows the internal structure schematic diagram of the film feedback throttle disclosed in the embodiment of the present invention;

[0035] Figure 4 The figure shows a schematic diagram of the oil circuit structure of the film feedback throttle disclosed in the embodiment of the present invention;

[0036] Figure 5 Shown is a flow chart of a hydrostatic bearing throttling control method disclosed in an embodiment of the present invention.

[0037] The above drawings include the following reference numerals:

[0038] 10. Turntable assembly; 20. Control assembly; 21. Solenoid valve; 211. First oil inlet; 212. First oil outlet; 213. Second oil outlet; 30. Throttle assembly; 31. First throttle; 32. Second throttle; 33. Film feedback throttle; 34. Throttle upper cover; 341. Arc boss; 35. Metal film; 36. Throttle body; 361. Groove; 362. Oil inlet; 363. First flow channel; 364. Second flow channel; 365. First flow channel; 366. Second flow channel; 367. Main oil port; 37. Sealing element; 40. Oil tank. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] like Figure 1As shown, according to an embodiment of the present application, a hydrostatic bearing throttling control device is provided, comprising a turntable assembly 10, a control assembly 20 and a throttling assembly 30. The turntable assembly 10 is provided with a hydrostatic bearing and a sensor, and the sensor is used to read the actual rotation speed and the actual oil chamber pressure of the hydrostatic bearing; the control assembly 20 comprises a solenoid valve controller and a solenoid valve 21, the solenoid valve controller is electrically connected to the sensor, and the solenoid valve 21 is electrically connected to the solenoid valve controller; the throttling assembly 30 comprises a first throttle 31 and a second throttle 32, the first throttle 31 is respectively connected to the solenoid valve 21 and the oil filling port of the turntable assembly 10, and the second throttle 32 is respectively connected to the solenoid valve 21 and the oil filling port of the turntable assembly 10.

[0043] In this embodiment, the actual speed and oil chamber pressure information of the hydrostatic bearing are obtained in real time and accurately through the sensor, and can be precisely controlled according to the actual working state of the bearing. The solenoid valve controller adjusts the state of the solenoid valve 21 according to the sensor data, so as to selectively inject oil into the bearing through the first throttle 31 or the second throttle 32, so as to accurately adjust the lubrication and support force of the bearing, and enhance the adaptability and response speed of the system. By accurately controlling the flow direction and flow rate of the oil, the lubrication effect and load-bearing capacity of the hydrostatic bearing can be optimized, ensuring that the hydrostatic bearing can maintain a stable working state under different working conditions. It helps to improve processing accuracy, extend the service life of the hydrostatic bearing, and reduce failures caused by poor lubrication or insufficient load-bearing capacity. By accurately controlling the flow rate and pressure of the oil, unnecessary energy waste can be avoided. When the hydrostatic bearing does not need too much lubrication or support force, the supply of oil can be automatically reduced, thereby reducing energy consumption and operating costs.

[0044] Optionally, the first throttle 31 and the second throttle 32 both include variable throttles, and the fluid resistance of the variable throttle changes with the external load of the hydrostatic bearing. The variable throttle includes a film feedback throttle 33, such as Figure 2 and Figure 3As shown, the film feedback throttle 33 includes a throttle upper cover plate 34, a metal film 35 and a throttle body 36. The throttle body 36 is provided with a groove 361. The throttle upper cover plate 34 is covered in the groove 361. The metal film 35 is arranged in the groove 361 to form an adjustment chamber and a pressure stabilizing chamber that are not communicated with each other. The adjustment chamber is located between the bottom of the groove 361 and the metal film 35, and the pressure stabilizing chamber is located between the metal film 35 and the throttle upper cover plate 34. The throttle body 36 is provided with a throttle platform, an oil inlet 362, a first flow channel 363, a second flow channel 364, The first flow channel 365, the second flow channel 366, the main oil port 367 and the oil outlet, the throttle stage is located in the pressure stabilizing chamber, the throttle stage is provided with a throttle stage oil port, the oil inlet 363 is communicated with the first flow channel port 363 and the second flow channel port 364 respectively, the second flow channel port 364 is communicated with the regulating chamber; the first flow channel port 363 is communicated with the first flow channel 365, the first flow channel 365 is communicated with the pressure stabilizing chamber and the second flow channel 366 respectively, the pressure stabilizing chamber is communicated with the throttle stage oil port, the throttle stage oil port is communicated with the oil outlet, the second flow channel 366 is communicated with the main oil port 367, the main oil port 367 is communicated with the oil outlet.

[0045] like Figure 4 As shown in the figure, the film feedback throttle is based on the annular area formed by a truncated cone with a radius of (r2-r1) and a thickness of The throttling is achieved by the seam trace h between the elastic film sheets. The film feedback throttling device of this embodiment is configured as follows:

[0046] When the oil outlet is not connected to a load, the metal film 35 is deformed by the pressure of the regulating chamber so that the volume of the pressure stabilizing chamber decreases, thereby controlling the flow rate of the oil outlet to decrease; when the oil outlet is connected to a load, the metal film 35 is deformed by the pressure of the pressure stabilizing chamber so that the volume of the pressure stabilizing chamber increases, thereby controlling the flow rate of the oil outlet to increase.

[0047] In this embodiment, the throttle body 36 cooperates with the throttle upper cover plate 34 and is connected by bolts and other connectors, forming a closed first flow channel and a second flow channel at the joint end surface, and the metal film 35 is pre-deformed under the pressure of the arc-shaped boss 341 of the throttle body 36 and the throttle upper cover plate 34, thereby forming a different regulating chamber and a pressure stabilizing chamber. The hydraulic oil enters the throttle from the oil inlet 362 at the pump pressure Ps, and the hydraulic oil entering the throttle 362 is divided into two streams, one of which flows through the first flow channel 365 and the first flow channel port 363 to enter the pressure stabilizing chamber, and the other flows through the second flow channel 366 directly into the main oil port. The other stream enters the second flow channel port 264 through the oil distribution and enters the regulating chamber through the groove. Specifically, when the oil outlet is not connected to a load, the oil outlet pressure Pr is 0, the oil pressure in the pressure stabilizing chamber is less than the oil pressure in the regulating chamber, the metal film 35 is deformed by pressure, and bends and deforms toward the direction close to the throttle table, so that the gap between the throttle table and the metal film 35 is 0. At this time, the oil outlet only has hydraulic oil flowing out through the main oil port 367, and the oil outlet flow rate is minimum at this time. When the oil outlet is connected to a load, the pressure in the pressure stabilizing chamber increases, the original equilibrium state is broken, the metal film 35 bends and deforms toward the throttle upper cover plate 34, the gap between the throttle table and the film increases, and the hydraulic oil in the pressure stabilizing chamber can flow out through the throttle table oil port, merge with the hydraulic oil in the main oil port, and flow out from the oil outlet together. When the load pressure changes, the metal film 35 will deform accordingly under the action of force, and the volume of the pressure stabilizing chamber will change along with the deformation of the metal film 35, thereby controlling the flow rate of the oil outlet. The greater the load pressure, the greater the flow rate, so that the oil film thickness changes very little, and has a higher oil film rigidity, thereby ensuring that the static pressure functional components connected to it have high motion accuracy requirements.

[0048] Specifically, the diaphragm feedback throttle of the present embodiment also includes a sealing element 37, which includes a sealing ring. The sealing ring is arranged in the gap between the throttle upper cover plate 34 and the throttle body 36, so that the throttle upper cover plate 34 can better seal the groove 361 of the throttle body 36. Because an adjustment chamber is arranged in the groove 361 near the throttle upper cover plate 34, oil will flow through the adjustment chamber when the hydrostatic turntable is working. Therefore, the sealing treatment can prevent the oil in the adjustment chamber from overflowing, thereby improving the reliability of the hydrostatic turntable.

[0049] like Figure 1As shown, the solenoid valve 21 includes a two-position three-way solenoid valve, which is provided with a first oil inlet 211, a first oil outlet 212 and a second oil outlet 213. The first oil inlet 211 is connected to the oil tank 40, the first oil outlet 212 is connected to the first throttle 31, and the second oil outlet 213 is connected to the second throttle 32. When the solenoid valve controller is in the first control mode, the first oil inlet 211 is connected to the first oil outlet 212, and when the solenoid valve controller is in the second control mode, the first oil inlet 211 is connected to the second oil outlet 213.

[0050] By switching the solenoid valve controller between the first control mode and the second control mode, the two-position three-way solenoid valve can selectively connect the first oil outlet 212 with the first throttle 31 or connect the second oil outlet 213 with the second throttle 32, and can flexibly adjust the flow path of the oil according to actual needs, thereby realizing accurate control of the bearing capacity. When the solenoid valve controller is in different control modes, the oil will flow into the hydrostatic bearing through different throttles, and different throttles have different pressure regulation characteristics. Therefore, by changing the flow direction of the oil, different configurations of bearing lubrication and support force can be achieved, thereby significantly expanding the range of the bearing capacity of the hydrostatic bearing. Since the bearing capacity of the hydrostatic bearing can be flexibly adjusted, this embodiment can make the hydrostatic bearing better adapt to different processing requirements, thereby improving the overall processing efficiency. By adopting a two-position three-way solenoid valve and a corresponding throttle configuration, whether under high load, low speed or high speed processing conditions, the bearing performance can be optimized by adjusting the oil circuit, thereby ensuring the smooth progress of the processing.

[0051] Furthermore, the sensor includes a speed sensor and a pressure sensor, which are respectively arranged on the hydrostatic bearing. The speed sensor is used to read the actual speed of the hydrostatic bearing, and the pressure sensor is used to read the actual oil chamber pressure of the hydrostatic bearing.

[0052] like Figure 5 As shown, according to an embodiment of the present application, a hydrostatic bearing throttling control method is also provided, the method is at least performed by the above-mentioned hydrostatic bearing throttling control device, and the method includes:

[0053] Step S1: setting control parameters of the solenoid valve controller, the control parameters including a preset pressure value and a preset speed value;

[0054] Specifically, the control parameters of the solenoid valve controller are determined according to the normal working condition range of the specific industrial equipment to which the hydrostatic bearing is applied. In this embodiment, the preset pressure value of the solenoid valve controller is set to 5000N, and the preset speed value is set to 1000RPM.

[0055] Step S2: reading the actual rotation speed and the actual oil chamber pressure of the hydrostatic bearing through a sensor, and calculating the external load of the hydrostatic bearing according to the actual oil chamber pressure;

[0056] Furthermore, the external load is calculated by multiplying the actual oil chamber pressure read by the sensor by the effective area of ​​the oil chamber. The calculation formula of the external load is:

[0057] F=P1×Ae1-P2×Ae2, where: F represents the external load of the hydrostatic bearing, P1 represents the pressure on the high-pressure side of the oil chamber, P2 represents the pressure on the low-pressure side of the oil chamber, Ae1 represents the effective area on the high-pressure side of the oil chamber, and Ae2 represents the effective area on the low-pressure side of the oil chamber.

[0058] Specifically, the hydrostatic bearing throttling control device is started to control the hydrostatic bearing to start running. The speed sensor and the pressure sensor work in real time. The actual speed of the hydrostatic bearing is read by the speed sensor, and the actual oil chamber pressure of the hydrostatic bearing is read by the pressure sensor. The external load of the hydrostatic bearing is calculated based on the actual oil chamber pressure. For example, at a certain moment, the sensor reads that the pressure P1 on the high-pressure side of the oil chamber is 60N / cm 2 , the pressure P2 on the low pressure side of the oil chamber is 40N / cm 2 According to the external load calculation formula F = P1 × Ae1-P2 × Ae2, the effective area of ​​the high-pressure side oil chamber is set to 100cm 2 , the effective area of ​​the low pressure side oil chamber is 80cm 2 , we can obtain the external load F = 60×100-40×80 = 2800N, and the speed sensor measures the actual speed to be 800RPM.

[0059] Step S3: determining the control mode of the solenoid valve controller according to the magnitude relationship between the actual speed and the preset speed value and the magnitude relationship between the external load and the preset pressure value;

[0060] Further, the control mode includes a first control mode and a second control mode. The first control mode is configured to control the solenoid valve to be connected to the first throttle through the solenoid valve controller, and the second control mode is configured to control the solenoid valve to be connected to the second throttle through the solenoid valve controller.

[0061] Further, step S3 includes:

[0062] Step S31: determining the magnitude relationship between the actual rotation speed and the preset rotation speed value, and the magnitude relationship between the external load and the preset pressure value;

[0063] Step S32: If the actual speed is not greater than the preset speed value and the external load is not greater than the preset pressure value, switching the control mode of the solenoid valve controller to the first control mode;

[0064] Step S33: If the actual speed is greater than the preset speed value or the external load is greater than the preset pressure value, the control mode of the solenoid valve controller is switched to the second control mode.

[0065] Step S4: Controlling the solenoid valve controller to connect the throttle corresponding to the control mode to adjust the load range of the hydrostatic bearing.

[0066] Further, the load interval includes a first load interval and a second load interval, the first load interval is configured as [a, b], and the second load interval is configured as (b, c], where a<b<c, and step S4 includes:

[0067] Step S41: when the solenoid valve controller is in the first control mode, the solenoid valve controller controls the solenoid valve to communicate with the first throttle, so as to adjust the load range of the hydrostatic bearing to the first load range;

[0068] Step S42: When the solenoid valve controller is in the second control mode, the solenoid valve controller controls the solenoid valve to communicate with the second throttle to adjust the load range of the hydrostatic bearing to the second load range.

[0069] Specifically, the device automatically determines the control mode of the solenoid valve controller according to the size relationship between the actual speed and the preset speed value and the size relationship between the external load and the preset pressure value: since the actual speed of 800RPM is not greater than the preset speed value of 1000RPM, and the external load of 2800N is not greater than the preset pressure value of 5000N, the control mode of the solenoid valve controller is switched to the first control mode. After receiving the instruction, the solenoid valve controller quickly controls the solenoid valve 21 and the first throttle 31 to be connected. At this time, the load range of the hydrostatic bearing is adjusted to the first load range [a, b]. Assuming that a=2000N and b=4000N are set in this embodiment, the hydrostatic bearing can work under suitable conditions to ensure good lubrication and load-bearing performance. As the operating conditions change, it is monitored again that the actual speed is increased to 1200RPM, the oil chamber pressure also changes, and the external load is recalculated to be 3500N. At this time, since the actual speed of 1200RPM is greater than the preset speed value of 1000RPM, according to the control logic, even if the external load is still less than the preset pressure value, the control mode of the solenoid valve controller is switched to the second control mode. The solenoid valve controller controls the solenoid valve 21 to be connected with the second throttle 32, and adjusts the load range of the hydrostatic bearing to the second load range (b, c], assuming c = 6000N, to adapt to the new working state, maintain the stable operation of the hydrostatic bearing, and avoid problems such as wear and heat caused by changes in working conditions.

[0070] In the above embodiment, the actual speed and actual oil chamber pressure of the hydrostatic bearing are obtained in real time by an integrated sensor, and the external load is calculated according to the actual oil chamber pressure, so as to realize accurate monitoring of the working state of the hydrostatic bearing. According to the monitoring results, the solenoid valve controller can intelligently switch the control mode and select the most suitable throttle for oil supply, so as to ensure that the hydrostatic bearing can maintain the best working state under different working conditions. This adaptive control method significantly improves the stability and reliability of the system. By defining different load intervals and adjusting the load interval of the bearing according to the actual working conditions, fine control of the bearing lubrication and bearing capacity is realized. In the first control mode, the bearing works in a lower load range, which is suitable for light load or low speed working conditions; in the second control mode, the bearing can cope with heavy load or high speed working conditions. This optimization of the load range enables the bearing to exhibit good lubrication and load-bearing performance under various working conditions, thereby extending the service life. By accurately controlling the flow direction and flow rate of the oil, this embodiment can avoid unnecessary energy waste. When the hydrostatic bearing does not need too much lubrication or load-bearing capacity, the supply of oil can be automatically reduced, thereby reducing energy consumption and operating costs.

[0071] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0072] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrostatic bearing throttling control method, characterized in that: include: Step S1: setting control parameters of the solenoid valve controller, wherein the control parameters include a preset pressure value and a preset speed value; Step S2: reading the actual rotation speed and the actual oil chamber pressure of the hydrostatic bearing through a sensor, and calculating the external load of the hydrostatic bearing according to the actual oil chamber pressure; Step S3: determining a control mode of the solenoid valve controller according to a magnitude relationship between the actual speed and the preset speed value and a magnitude relationship between the external load and the preset pressure value; Step S4: controlling the solenoid valve through the solenoid valve controller to connect the throttle corresponding to the control mode to adjust the load range of the hydrostatic bearing.

2. The hydrostatic bearing throttling control method according to claim 1, characterized in that: The control mode includes a first control mode and a second control mode. The first control mode is configured to control the solenoid valve to be connected to the first throttle through the solenoid valve controller, and the second control mode is configured to control the solenoid valve to be connected to the second throttle through the solenoid valve controller.

3. The hydrostatic bearing throttling control method according to claim 2, characterized in that: The step S3 comprises: Step S31: determining the magnitude relationship between the actual rotation speed and the preset rotation speed value, and the magnitude relationship between the external load and the preset pressure value; Step S32: If the actual speed is not greater than the preset speed value and the external load is not greater than the preset pressure value, switching the control mode of the solenoid valve controller to the first control mode; Step S33: If the actual speed is greater than the preset speed value or the external load is greater than the preset pressure value, the control mode of the solenoid valve controller is switched to the second control mode.

4. The hydrostatic bearing throttling control method according to claim 2, characterized in that: The load interval includes a first load interval and a second load interval, the first load interval is configured as [a, b], and the second load interval is configured as (b, c], where a<b<c, and the step S4 includes: Step S41: when the solenoid valve controller is in the first control mode, the solenoid valve controller is used to control the solenoid valve to communicate with the first throttle, so as to adjust the load range of the hydrostatic bearing to the first load range; Step S42: when the solenoid valve controller is in the second control mode, the solenoid valve controller controls the solenoid valve to communicate with the second throttle, so as to adjust the load range of the hydrostatic bearing to the second load range.

5. The hydrostatic bearing throttling control method according to claim 1, characterized in that: The external load is calculated by multiplying the actual oil chamber pressure read by the sensor by the effective area of ​​the oil chamber. The calculation formula of the external load is: F=P1×Ae1-P2×Ae2, where: F represents the external load of the hydrostatic bearing, P1 represents the pressure on the high-pressure side of the oil chamber, P2 represents the pressure on the low-pressure side of the oil chamber, Ae1 represents the effective area on the high-pressure side of the oil chamber, and Ae2 represents the effective area on the low-pressure side of the oil chamber.

6. A hydrostatic bearing throttling control device, characterized in that: The hydrostatic bearing throttling control device is at least used to execute the hydrostatic bearing throttling control method according to any one of claims 1 to 5, characterized in that the hydrostatic bearing throttling control device comprises: A turntable assembly, wherein the turntable assembly is provided with a hydrostatic bearing and a sensor, wherein the sensor is used to read an actual rotation speed and an actual oil chamber pressure of the hydrostatic bearing; A control component, the control component comprising a solenoid valve controller and a solenoid valve, the solenoid valve controller is electrically connected to the sensor, and the solenoid valve is electrically connected to the solenoid valve controller; A throttling assembly, the throttling assembly includes a first throttle and a second throttle, the first throttle is respectively connected to the solenoid valve and the oil filling port of the turntable assembly, and the second throttle is respectively connected to the solenoid valve and the oil filling port of the turntable assembly.

7. The hydrostatic bearing throttling control device according to claim 6, characterized in that: The first throttle and the second throttle both include variable throttles, and the fluid resistance of the variable throttle changes with the external load of the hydrostatic bearing.

8. The hydrostatic bearing throttling control device according to claim 7, characterized in that: The variable throttle comprises a film feedback throttle, which comprises a throttle upper cover, a metal film and a throttle body, wherein the throttle body is provided with a groove, the throttle upper cover is covered in the groove, the metal film is arranged in the groove to form an adjusting chamber and a pressure stabilizing chamber which are not communicated with each other, the adjusting chamber is located between the bottom of the groove and the metal film, and the pressure stabilizing chamber is located between the metal film and the throttle upper cover; the throttle body is provided with a throttle platform, an oil inlet, a first flow channel, a second flow channel, a first a flow channel, a second flow channel, a main oil port and an oil outlet, the throttle platform is located in the pressure stabilizing chamber, the throttle platform is provided with a throttle platform oil port, the oil inlet is communicated with the first flow channel port and the second flow channel port respectively, the second flow channel port is communicated with the regulating chamber; the first flow channel port is communicated with the first flow channel, the first flow channel is communicated with the pressure stabilizing chamber and the second flow channel respectively, the pressure stabilizing chamber is communicated with the throttle platform oil port, the throttle platform oil port is communicated with the oil outlet, the second flow channel is communicated with the main oil port, and the main oil port is communicated with the oil outlet; The film feedback throttle is configured as follows: When the oil outlet is not connected to a load, the metal film is deformed by the pressure of the regulating chamber to reduce the volume of the pressure stabilizing chamber, thereby controlling the flow rate of the oil outlet to decrease; When the oil outlet is connected to a load, the metal film is deformed by the pressure of the pressure stabilizing chamber to increase the volume of the pressure stabilizing chamber, thereby controlling the increase in the flow rate of the oil outlet.

9. The hydrostatic bearing throttling control device according to claim 6, characterized in that: The solenoid valve comprises a two-position three-way solenoid valve, which is provided with a first oil inlet, a first oil outlet and a second oil outlet, wherein the first oil inlet is connected to the oil tank, the first oil outlet is connected to the first throttle, and the second oil outlet is connected to the second throttle, and when the solenoid valve controller is in a first control mode, the first oil inlet is connected to the first oil outlet, and when the solenoid valve controller is in a second control mode, the first oil inlet is connected to the second oil outlet.

10. The hydrostatic bearing throttling control device according to claim 6, characterized in that: The sensor includes a speed sensor and a pressure sensor, and the speed sensor and the pressure sensor are respectively arranged on the hydrostatic bearing. The speed sensor is used to read the actual speed of the hydrostatic bearing, and the pressure sensor is used to read the actual oil chamber pressure of the hydrostatic bearing.

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