Hydrostatic guideway mechanism, equipment and control method of hydrostatic guideway mechanism

Abstract

The invention discloses a hydrostatic guideway mechanism, equipment and a control method of the hydrostatic guideway mechanism. The static pressure guide rail mechanism comprises a sliding block, a throttler and an adjusting assembly. Specifically, at least one side face of the sliding block is provided with a static pressure cavity, and the sliding block is provided with an oil hole communicated with the static pressure cavity. The throttler is installed on the sliding block and used for conveying oil liquid to the static pressure cavity and adjusting the pressure of the oil liquid. The adjusting assembly is arranged on the sliding block and used for adjusting the viscosity of the oil liquid. According to the hydrostatic guideway mechanism, the hydrostatic guideway equipment and the control method of the hydrostatic guideway mechanism, at least the problems that in a hydrostatic guideway system in the prior art, due to the adaptive deviation of the flow characteristics of the throttler and the oil cavity, the oil film rigidity is unstable, the bearing capacity fluctuates, and the motion precision is reduced can be solved.

Description

Technical Field

[0001] This application relates to the field of hydrostatic technology, and more specifically, to a hydrostatic guide rail mechanism, equipment, and a control method for the hydrostatic guide rail mechanism. Background Technology

[0002] In related technologies, due to factors such as machining errors during manufacturing and installation deviations during assembly, the actual pressure-flow characteristics of the throttle and the oil chamber often cannot achieve an ideal match, and can only approach the design value as closely as possible. The deviation between the actual pressure-flow characteristics of the throttle and the oil chamber leads to problems such as unstable oil film stiffness, fluctuating load-bearing capacity, and decreased motion accuracy. These problems are particularly pronounced in high-speed, heavy-load, or precision motion scenarios, severely limiting the application of hydrostatic guide rail systems. Summary of the Invention

[0003] The main objective of this application is to provide a hydrostatic guide rail mechanism, equipment, and control method for the hydrostatic guide rail mechanism, so as to solve the problems of unstable oil film stiffness, fluctuating load-bearing capacity, and decreased motion accuracy caused by the mismatch between the throttle and the pressure flow characteristics of the oil chamber in the existing hydrostatic guide rail system.

[0004] According to one aspect of this application, a hydrostatic guide rail mechanism is provided, comprising: A slider, wherein at least one side of the slider is provided with a static pressure chamber, and the slider is provided with an oil hole communicating with the static pressure chamber; A throttle valve, mounted on the slider, is used to deliver oil to the static pressure chamber and regulate the pressure of the oil. An adjustment component is disposed on the slider for adjusting the viscosity of the oil.

[0005] Furthermore, the oil includes a magnetorheological fluid; The adjustment component includes a magnetically controlled adjustment component, which includes an electromagnetic coil and an excitation power supply. The excitation power supply is electrically connected to the electromagnetic coil, and the electromagnetic coil is disposed on the outer surface of the static pressure chamber to adjust the viscosity of the magnetorheological fluid.

[0006] Furthermore, the magnetic control adjustment assembly also includes a controller and a pressure detection element. The pressure detection element is disposed on the slider to detect the pressure of the magnetorheological fluid in the static pressure chamber. The pressure detection element, the controller, and the excitation power supply are electrically connected to form a control loop. The controller controls the magnitude of the output current of the excitation power supply according to the pressure signal transmitted by the pressure detection element.

[0007] Furthermore, the static pressure chamber includes multiple components, and the throttle also includes multiple components, with each static pressure chamber and throttle corresponding to one another; and / or, The throttle includes a fixed throttle or a variable throttle. When the throttle includes a variable throttle, the variable throttle is electrically connected to the controller, and the controller is used at least to adjust the throttle parameters of the variable throttle.

[0008] Furthermore, the static pressure chamber includes a first sidewall, which is parallel to the side of the slider on which the static pressure chamber is located, and the electromagnetic coil is disposed on the first sidewall and flush with the first sidewall.

[0009] Furthermore, the electromagnetic coil is spirally arranged on the first sidewall, and the spacing between adjacent turns of the electromagnetic coil is equal.

[0010] Furthermore, the electromagnetic coil is disposed on the first sidewall and flush with the first sidewall by means of sealant.

[0011] Furthermore, an insulating coating is provided on the inner wall surface of the static pressure chamber, and the insulating coating covers the electromagnetic coil.

[0012] Secondly, this application provides a device that includes the aforementioned hydrostatic guide rail mechanism.

[0013] Thirdly, this application provides a control method for a hydrostatic guide rail mechanism, the control method for controlling the aforementioned hydrostatic guide rail mechanism, the control method for the hydrostatic guide rail mechanism comprising: The pressure in the static pressure chamber is monitored in real time. When the pressure in the static pressure chamber is compared with a preset pressure value to obtain the pressure deviation, when the pressure deviation is greater than or less than a predetermined deviation range, the viscosity of the oil is adjusted using the adjustment component until the pressure deviation is within the predetermined deviation range.

[0014] Furthermore, when the pressure deviation exceeds the predetermined deviation range, the viscosity of the oil is adjusted using the adjusting component to reduce the viscosity of the oil; and / or, When the pressure deviation is less than the predetermined deviation range, the viscosity of the oil is adjusted using the adjustment component to increase the viscosity of the oil.

[0015] In this application, by providing an adjustment component on the slider, which is used to adjust the viscosity of the oil (e.g., by local heating / cooling, or mixing oils of different viscosities, or by using a magnetic field to adjust the viscosity of the oil), the flow resistance of the oil entering the static pressure chamber can be dynamically changed, thereby adjusting the pressure-flow characteristics of the static pressure chamber in real time, so that the pressure-flow characteristics of the static pressure chamber are always precisely matched with the pressure-flow characteristics of the throttle, thereby improving the rigidity, stability and motion accuracy of the static pressure guide rail mechanism. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, are illustrative and descriptive, serving to explain this application and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a structural diagram of a partial structure of a hydrostatic guide rail mechanism disclosed in an embodiment of this application, viewed from a first perspective. Figure 2 This is a structural diagram of a partial structure of a hydrostatic guide rail mechanism disclosed in an embodiment of this application, viewed from a second perspective. Figure 3 This is a first side view of a hydrostatic guide rail mechanism disclosed in an embodiment of this application; Figure 4 This is a second side view of a hydrostatic guide rail mechanism disclosed in an embodiment of this application; Figure 5 This is a third side view of a hydrostatic guide rail mechanism disclosed in an embodiment of this application.

[0017] The above figures include the following reference numerals: 10. Slider; 101. Side; 11. Static pressure chamber; 111. First side wall; 12. Oil hole; 13. Main oil inlet; 20. Throttling device; 30. Adjustment component; 31. Electromagnetic coil; 32. Pressure detection element; 40. Sealing ring. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0021] As described in the background section, in related technologies, due to factors such as machining errors during manufacturing and installation deviations during assembly, the actual pressure-flow characteristics of the throttle and the oil cavity often fail to achieve an ideal match, only approaching the design value as closely as possible. The deviation between the actual pressure-flow characteristics of the throttle and the oil cavity leads to problems such as unstable oil film stiffness, fluctuating load-bearing capacity, and decreased motion accuracy. These problems are particularly pronounced in high-speed, heavy-load, or precision motion scenarios, severely limiting the application of hydrostatic guide rail systems. Therefore, this application provides a novel hydrostatic guide rail mechanism. This mechanism can detect the real-time pressure of the magnetorheological fluid in the hydrostatic cavity and adjust the output current of the excitation power supply according to the pressure, thereby changing the viscosity of the magnetorheological fluid. This solves the problems of unstable oil film stiffness, fluctuating load-bearing capacity, and decreased motion accuracy caused by the mismatch between the pressure-flow characteristics of the throttle and the oil cavity in hydrostatic guide rail systems. The hydrostatic guide rail mechanism of this application will be described below with reference to the accompanying drawings.

[0022] See Figures 1 to 5 As shown in the figure, this application embodiment provides a hydrostatic guide rail mechanism. The hydrostatic guide rail mechanism includes a slider 10, a throttle 20, and an adjustment assembly 30.

[0023] Specifically, at least one side 101 of the slider 10 is provided with a static pressure chamber 11, and the slider 10 is provided with an oil hole 12 communicating with the static pressure chamber 11; a throttle 20 is installed on the slider 10, and the throttle 20 is used to deliver oil to the static pressure chamber 11 and regulate the pressure of the oil; an adjusting component 30 is provided on the slider 10 to adjust the viscosity of the oil. It can be understood that the oil hole 12 refers to the hole through which oil flows out of the static pressure chamber 11 to form an oil film.

[0024] In actual operation, after the hydrostatic guide rail (not shown in the figure) is slidably engaged with the slider 10, the hydrostatic chamber 11 continuously supplies oil with a certain pressure through the throttle 20, forming a stable oil film between the slider 10 and the hydrostatic guide rail. This allows for pure liquid friction between the slider 10 and the guide rail, significantly reducing frictional resistance and wear, and extending the service life of the hydrostatic guide rail. Simultaneously, this application provides an adjustment component 30 on the slider 10. This adjustment component 30 is used to adjust the viscosity of the oil (e.g., through local heating / cooling, mixing oils of different viscosities, or adjusting the viscosity of the oil using a magnetic field). This dynamically changes the flow resistance of the oil entering the hydrostatic chamber 11, thereby adjusting the pressure-flow characteristics of the hydrostatic chamber 11 in real time. This ensures that the pressure-flow characteristics of the hydrostatic chamber 11 are always precisely matched with the pressure-flow characteristics of the throttle 20, thereby improving the rigidity, stability, and motion accuracy of the hydrostatic guide rail mechanism.

[0025] Understandably, the viscosity of the oil directly affects the load-bearing capacity of the oil film. When the load increases, adjusting component 30 reduces the oil viscosity, increasing the amount of oil flowing out of oil hole 12 and enhancing the supporting force of the oil film. Conversely, adjusting component 30 increases the oil viscosity, reducing the amount of oil flowing out of oil hole 12 and ensuring the stability of the oil film. In other words, by adjusting the oil viscosity, the oil film stiffness of the guide rail can be actively adjusted without changing the oil supply pressure or the structure of the throttle 20, to cope with different load conditions and avoid excessive fluctuations in oil film thickness due to load changes, thereby maintaining operational accuracy.

[0026] In other words, by setting the adjustment component 30 to adjust the viscosity of the oil in this application, the pressure-flow characteristics of the static pressure chamber 11 can be dynamically and in real time adjusted to always be precisely matched with the pressure-flow characteristics of the throttle 20, which effectively solves the problems of insufficient stiffness, poor stability and limited accuracy caused by static matching in traditional systems.

[0027] like Figures 1 to 5 As shown, the oil includes a magnetorheological fluid; the regulating component 30 includes a magnetically controlled regulating component, which includes an electromagnetic coil 31 and an excitation power supply (not shown in the figure). The excitation power supply is electrically connected to the electromagnetic coil 31, which is disposed on the outer surface of the static pressure chamber 11 to regulate the viscosity of the magnetorheological fluid. It can be understood that the magnetorheological fluid is a special suspension system formed by uniformly dispersing micron-sized magnetizable particles in a specific carrier mother liquor (i.e., oil) and additives. Under the action of an external magnetic field, it exhibits the characteristics of a non-Newtonian fluid, transforming from a freely flowing liquid to a semi-solid or even a solid within milliseconds, exhibiting strong controllable rheological properties.

[0028] It is understandable that the viscosity change of magnetorheological fluid can be completed within milliseconds, which is several orders of magnitude faster than changing viscosity through heating / cooling (on the order of seconds or minutes). This allows the system to respond in real time to sudden changes in load, rapid switching of motion states, or external impacts, instantly adjusting the oil film characteristics to suppress vibration and maintain stability. Simultaneously, in this application, the excitation power supply is used to precisely control the magnetic field strength of the electromagnetic coil 31, thereby continuously and in real time adjusting the effective viscosity and damping characteristics of the magnetorheological fluid in the hydrostatic chamber 11, achieving active control of the support stiffness of the hydrostatic guide rail mechanism. In this application, when the external load changes abruptly or is subjected to vibration impact, the viscosity of the magnetorheological fluid can be increased or decreased by instantaneously enhancing the magnetic field, adjusting the pressure within the hydrostatic chamber 11, ensuring oil film stability, effectively suppressing displacement fluctuations, and significantly improving the dynamic stiffness and anti-interference performance of the system. Furthermore, since the viscosity of the magnetorheological fluid is adjustable with the magnetic field, it is equivalent to dynamically adjusting the pressure-flow characteristics in the static pressure chamber 11 without changing the physical structure of the throttle 20. This allows the flow-pressure characteristics output by the throttle 20 to always maintain the best match with the pressure-flow requirements of the static pressure chamber 11, fundamentally solving the problems of oil film instability and stiffness reduction caused by the mismatch between fixed throttling and variable working conditions in traditional static pressure guide rail mechanisms.

[0029] Furthermore, in this application, the electromagnetic coil 31 is disposed on the outer surface of the static pressure chamber 11. The magnetic field generated by the electromagnetic coil 31 can directly penetrate the cavity wall of the static pressure chamber 11 and act on the magnetorheological fluid inside the chamber. The magnetic field is concentrated and has low loss, resulting in higher adjustment efficiency (no additional magnetic conductive structure is required). At the same time, the electromagnetic coil 31 does not come into direct contact with the magnetorheological fluid, avoiding oil contamination and corrosion of the electromagnetic coil 31 by the oil; this arrangement also improves the heat dissipation of the electromagnetic coil 31. In addition, this arrangement eliminates the need to create an installation groove inside the static pressure chamber 11, avoiding any impact on the structural strength and sealing performance of the static pressure chamber 11.

[0030] like Figures 1 to 5 As shown, the magnetic control adjustment assembly also includes a controller (not shown) and a pressure detection element 32. The pressure detection element 32 is disposed on the slider 10 to detect the pressure of the magnetorheological fluid in the static pressure chamber 11. The pressure detection element 32, the controller, and the excitation power supply are electrically connected to form a control loop. The controller controls the output current of the excitation power supply based on the pressure signal transmitted by the pressure detection element 32. With this configuration, the pressure detection element 32 monitors the actual pressure of the magnetorheological fluid in the static pressure chamber 11 in real time and feeds the signal back to the controller. The controller dynamically adjusts the output current of the excitation power supply based on the deviation between the preset target pressure (or pressure-displacement relationship model) and the measured value, thereby changing the magnetic field strength of the electromagnetic coil 31, adjusting the viscosity and flow resistance of the magnetorheological fluid, and ultimately stabilizing the pressure in the static pressure chamber 11 at the desired value.

[0031] Specifically, when the load increases, the pressure inside the static pressure chamber 11 rises, risking the oil film from being squeezed and thinned. The static pressure detection element 32 transmits the detected signal to the controller, which automatically reduces the output current of the excitation power supply. This weakens the magnetic field strength generated by the electromagnetic coil 31, reduces the viscosity of the magnetorheological fluid, and increases the amount of magnetorheological fluid flowing out of the oil hole 12, thereby increasing the oil film stiffness to counteract the load pressure and maintain a stable oil film thickness. When the load decreases, the pressure inside the static pressure chamber 11 decreases. The pressure detection element 32 transmits the detected signal to the controller, which automatically increases the output current of the excitation power supply. This strengthens the magnetic field strength generated by the electromagnetic coil 31, increases the viscosity of the magnetorheological fluid, and increases the pressure-flow resistance inside the static pressure chamber 11, causing the pressure inside the static pressure chamber 11 to rise back to the preset value and maintain a stable oil film thickness. Thus, manual adjustment of the current parameters based on operating conditions is unnecessary, significantly improving operational convenience.

[0032] Furthermore, in this application, the pressure detection element 32 is a pressure sensor, which is placed on the slider 10 (near the static pressure chamber 11). The detection signal is direct and without delay, and can accurately capture minute pressure fluctuations. The controller analyzes the pressure signal through an algorithm (such as a PID control algorithm) and outputs precise current adjustment commands, so that the change in the output current of the excitation power supply corresponds to the pressure fluctuation in real time, avoiding over- or under-adjustment of the magnetorheological fluid viscosity.

[0033] In other words, this application upgrades the viscosity adjustment of magnetorheological fluid from passive adaptation to active response through a closed loop formed by the pressure detection element 32, the controller and the excitation power supply, realizing real-time, accurate and intelligent matching of pressure state to viscosity parameters.

[0034] like Figures 1 to 5 As shown, the static pressure chamber 11 includes multiple chambers, and the throttle valve 20 also includes multiple throttle valves, with each static pressure chamber 11 and throttle valve 20 arranged in a one-to-one correspondence. For example, there can be two, three, or four static pressure chambers 11, and the number of throttle valves 20 can also be two, three, or four. This application illustrates a case with three static pressure chambers 11 and three throttle valves 20. Each static pressure chamber 11 is equipped with a dedicated throttle valve 20, allowing for independent adjustment of the oil input pressure and flow rate of that chamber, avoiding pressure interference issues that occur when multiple chambers share a throttle valve 20. Simultaneously, the multi-chamber design can utilize more areas to generate effective support force under the same oil supply pressure, thereby significantly improving the overall load-bearing capacity. Furthermore, because the pressure is confined within each chamber, a more stable and rigid "pressure pad" is formed, resulting in higher overall oil film stiffness and stronger resistance to load deformation. Each static pressure chamber 11 has an electromagnetic coil 31 on its outer surface. The controller can independently control the excitation current of each electromagnetic coil 31 to achieve differentiated adjustment of the pressure-current characteristics of different static pressure chambers 11.

[0035] In some applications, the slider 10 has an upper static pressure chamber and a lower static pressure chamber arranged opposite each other. These chambers allow the slider 10 to move along the sliding direction without overturning moment. In this case, a pressure detection element 32 is used to detect the pressure in either the upper or lower static pressure chamber. The controller aims to stabilize this pressure value at a preset value (corresponding to a state without lateral force). As long as this pressure value is stable, it means that the slider 10 is in force balance in that direction, and there is no need to know the absolute pressure value of the other chamber. The pressure on the other side is an automatic "result" generated by the system to meet the balance condition. This configuration reduces production costs. The pressure detection of the two oppositely arranged side static pressure chambers can be achieved by using a single pressure detection element 32 to detect the pressure in one of the side static pressure chambers. That is, in this application, a case is shown where there are three static pressure chambers 11 but only two pressure detection elements 32 are used.

[0036] Optionally, the throttle 20 includes a fixed throttle or a variable throttle. When the throttle 20 includes a variable throttle, the variable throttle is electrically connected to the controller, and the controller is used to adjust the throttling parameters (opening degree, flow coefficient, pressure drop, etc.) of the variable throttle. For example, a fixed throttle includes a capillary throttle, an orifice throttle, etc.; a variable throttle includes an electro-hydraulic proportional throttle valve, an electromagnetic throttle, etc. In this application, the user can flexibly select the type of throttle 20 according to the specific application scenario. When the selected throttle 20 is a variable throttle, the controller is simultaneously connected to the pressure sensing element 32, the excitation power supply, and the variable throttle, forming a triple closed loop of "pressure feedback, throttle parameter adjustment, and viscosity adjustment." In this way, the hydrostatic guide rail mechanism can supplement oil film stiffness through viscosity adjustment (magnetorheological fluid) and solve the problem of insufficient oil film toughness after throttle parameter adjustment, with the two complementing each other. Based on magnetorheological fluid viscosity adjustment, an independent and powerful feedforward or collaborative control dimension is added, enabling the system to achieve wider-range, higher-precision, and faster-response pressure and flow control, and significantly improving the system's adaptive capability.

[0037] See you again Figures 1 to 5As shown, the static pressure chamber 11 includes a first sidewall 111, which is parallel to the side 101 on the slider 10 where the static pressure chamber 11 is located. An electromagnetic coil 31 is disposed on and flush with the first sidewall 111. This arrangement allows the magnetic field generated by the electromagnetic coil 31 to penetrate the first sidewall 111 with the shortest path and least magnetic resistance, directly acting on the magnetorheological fluid within the static pressure chamber 11. This significantly improves magnetic energy utilization, allowing the required magnetic field strength to be generated with a smaller current. The distance between the electromagnetic coil 31 and the static pressure chamber 11 is uniform, ensuring a stable magnetic field distribution. The magnetic field uniformly covers the entire static pressure chamber 11, avoiding insufficient viscosity adjustment of the magnetorheological fluid in certain areas (such as viscosity differences between the center and edges of the chamber), ensuring consistent overall stiffness of the oil film. Combined with pressure detection and adjustment by the throttle 20, this further enhances the uniformity of the oil film thickness.

[0038] Furthermore, the electromagnetic coil 31 is spirally arranged on the first sidewall 111, and the spacing between adjacent turns of the electromagnetic coil 31 is equal. Specifically, the equal spacing between adjacent turns means that the distance between the central axes of adjacent turns formed by the spiral winding of the electromagnetic coil 31 is consistent along the spiral extension direction of the electromagnetic coil 31, and this spacing is uniformly distributed throughout the winding range of the electromagnetic coil 31, without any local dense or sparse areas. The spiral layout ensures that the magnetic field lines generated by the electromagnetic coil 31 are axially uniformly distributed (parallel to the first sidewall 111), and the magnetic field lines of the spirally wound electromagnetic coil 31 can cover the entire first sidewall 111 of the static pressure cavity 11, without any magnetic field dead zones, ensuring that the viscosity of the magnetorheological fluid in the static pressure cavity 11 is consistent throughout. Specifically, the spiral shape refers to a zigzag spiral, which is similar to a polygon in shape to the first sidewall 111 of the static pressure cavity 11. It is worth noting that in this application, the oil hole 12 is located in the middle of two adjacent electromagnetic coils 31 to prevent the oil flowing out of the oil hole 12 from acting on the electromagnetic coil 31 for a long time, thereby causing damage to the electromagnetic coil 31.

[0039] In addition, the spiral electromagnetic coil 31 is flush with the first side wall 111. The surface of the electromagnetic coil 31 is smooth (without sharp edges or protrusions), and the spiral channels formed by equal spacing do not hinder the flow of oil. On the contrary, they can guide the oil to spread evenly along the spiral direction, avoid eddies or stagnation, and facilitate the collection of oil.

[0040] Of course, in some other embodiments of this application, the winding method of the electromagnetic coil 31 can also be arranged in an S-shape (i.e., serpentine).

[0041] Furthermore, the electromagnetic coil 31 is disposed on the first sidewall 111 and flush with the first sidewall 111 by a sealant. Exemplarily, the sealant can be a modified epoxy resin sealant, an organosilicon resin sealant, or a polyurethane sealant. Specifically, in this application, the electromagnetic coil 31 is a high-temperature resistant enameled wire, with an insulating protective sleeve covering the outside of the wire. A spiral coil mounting groove is provided on the first sidewall 111 of the static pressure chamber 11, and the electromagnetic coil 31 is embedded in the spiral coil mounting groove. The insulating protective sleeve and the coil mounting groove are sealed by the sealant. The static pressure chamber 11 is a cavity for high-pressure oil; any minor leakage will lead to pressure loss and performance failure. In this application, the sealant permanently seals the grooves and holes where the electromagnetic coil 31 is embedded, as well as the gaps within the electromagnetic coil 31 itself, completely eliminating the possibility of oil leaking to the outside of the slider 10 or electrical components through these paths. In addition, the sealant can provide a uniform, dense and controllable insulation layer, ensuring that there is an extremely high insulation resistance between the electromagnetic coil 31 and the conductive first sidewall 111 under any operating conditions, preventing breakdown and short circuit, and enhancing electrical safety and insulation reliability.

[0042] Furthermore, an insulating coating (not shown in the figure) is provided on the inner wall surface of the static pressure cavity 11, covering the electromagnetic coil 31. Exemplarily, the insulating coating can be a high-performance polymer coating (such as polyimide, polytetrafluoroethylene, epoxy resin coating, etc.), a ceramic coating, a composite coating, etc. In this application, the insulating coating is disposed inside the static pressure cavity 11. This insulating layer is used to prevent magnetic field leakage from affecting the metal wall of the static pressure cavity 11, and also to prevent electrochemical reactions between the magnetorheological fluid and the inner wall of the static pressure cavity 11. It is understood that the insulating coating covering the electromagnetic coil here refers to the insulating coating extending spatially and covering the inner wall region of the cavity corresponding to the electromagnetic coil 31 (i.e., the inner surface of the cavity wall of the static pressure cavity 11 corresponding to the electromagnetic coil 31), rather than physically encasing the electromagnetic coil 31 itself.

[0043] Furthermore, this application also includes an oil supply device (not shown in the figure), which includes an oil tank, an oil pump, and an overflow valve. The oil pump's inlet is connected to the oil tank, and the oil pump's outlet is connected to the main oil inlet 13 located on the slider 10 via a pipe. The main oil inlet 13 is connected to the inlet of the corresponding throttle 20 through an oil delivery channel located inside the slider 10. The overflow valve is connected in parallel between the oil pump's outlet and the oil tank to regulate the stability of the oil supply pressure. A sealing ring 40 is provided on the main oil inlet 13 to prevent oil leakage.

[0044] Secondly, this application also provides a device that includes the aforementioned hydrostatic guide rail mechanism. Therefore, the device provided in this embodiment includes all the technical effects of the aforementioned hydrostatic guide rail mechanism. Since the technical effects of the hydrostatic guide rail mechanism have been described in detail above, they will not be repeated here.

[0045] Thirdly, this application also provides a control method for a hydrostatic guide rail mechanism, which is used to control the aforementioned hydrostatic guide rail mechanism. The control method for the hydrostatic guide rail mechanism includes: The pressure in the static pressure chamber 11 is monitored in real time. When the pressure in the static pressure chamber 11 is compared with the preset pressure value, the pressure deviation is obtained. When the pressure deviation is greater than or less than the predetermined deviation range, the viscosity of the oil is adjusted by the adjustment component 30 until the pressure deviation is within the predetermined deviation range.

[0046] Specifically, when the hydrostatic guide rail mechanism is started, the oil pump of the oil supply device starts, pressurizes the oil in the oil tank and delivers it to the throttle 20. After being throttled by the throttle 20, it enters each hydrostatic chamber 11. Under pressure, the oil in the hydrostatic chamber 11 forms a supporting oil film, so that there is no contact between the slider 10 and the hydrostatic guide rail. In this application, the oil is also a magnetorheological fluid. The adjustment component 30 includes a magnetic control adjustment component, which includes an electromagnetic coil 31, an excitation power supply, a controller, and a pressure detection element 32. During the operation of the hydrostatic guide rail mechanism, the pressure in the hydrostatic chamber 11 is detected in real time by the pressure detection element 32. When the pressure in the hydrostatic chamber 11 is compared with a preset pressure value (which is determined according to the customer's actual experience) to obtain the pressure deviation, when the pressure deviation is greater than or less than the predetermined deviation range, the viscosity of the magnetorheological fluid is adjusted by the adjustment component 30 until the pressure deviation is within the predetermined deviation range. When the pressure deviation is not within the predetermined deviation range, it indicates that there is a mismatch between the pressure-flow characteristics of the static pressure chamber 11 and the pressure-flow characteristics of the throttle 20.

[0047] Specifically, the controller calculates the required output current of the excitation power supply using a PID algorithm and sends a control signal to the excitation power supply to adjust the output current. The change in the output current (i.e., the excitation current) of the excitation power supply causes a change in the excitation magnetic field generated by the electromagnetic coil 31, which in turn changes the viscosity of the magnetorheological fluid. This change in viscosity alters the pressure-flow characteristics of the static pressure chamber 11, causing the pressure within the static pressure chamber 11 to gradually approach a preset pressure value until the pressure deviation is within a predetermined range. This achieves precise matching between the pressure-flow characteristics of the static pressure chamber 11 and the pressure-flow characteristics of the throttle 20.

[0048] Furthermore, when the pressure deviation exceeds a predetermined deviation range, the viscosity of the oil is adjusted using the regulating component 30 to reduce the oil viscosity. Specifically, when the pressure deviation exceeds the predetermined deviation range, it indicates that the external load has increased, and the pressure inside the static pressure chamber 11 will increase. After the pressure detection element 32 detects the increase in pressure inside the static pressure chamber 11, it transmits a signal to the controller. The controller reduces the output current of the excitation power supply, weakens the magnetic field strength, reduces the viscosity of the magnetorheological fluid, and reduces the pressure flow resistance of the static pressure chamber 11, thereby reducing the pressure inside the static pressure chamber 11 to a preset value and ensuring stable oil film stiffness.

[0049] When the pressure deviation is less than the predetermined deviation range, the viscosity of the oil is adjusted by the regulating component 30 to increase the viscosity of the oil. Specifically, when the pressure deviation is less than the predetermined deviation range, it indicates that the external load has increased, and the pressure in the static pressure chamber 11 will decrease. After the pressure detection element 32 detects the decrease in pressure in the static pressure chamber 11, it transmits the signal to the controller. The controller increases the output current of the excitation power supply, enhances the magnetic field strength, increases the viscosity of the magnetorheological fluid, increases the pressure flow resistance of the static pressure chamber 11, and causes the pressure in the static pressure chamber 11 to rise back to the preset value, ensuring the stability of the oil film stiffness.

[0050] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: (1) This application provides an electromagnetic coil on the first sidewall 111 of the static pressure chamber 11. By utilizing the characteristic that the viscosity of the magnetorheological fluid changes with the magnetic field strength, the pressure-flow characteristics of the static pressure chamber 11 can be dynamically adjusted. In view of the mismatch between the throttle 20 and the static pressure chamber 11 caused by manufacturing and assembly errors in the traditional system, the excitation current can be adjusted by the controller to change the magnetic field strength, thereby adjusting the viscosity of the magnetorheological fluid. This allows the pressure-flow characteristics of the static pressure chamber 11 and the throttle 20 to achieve an ideal matching state, fundamentally solving the problem of low matching accuracy in the traditional system.

[0051] (2) This application forms a closed-loop control circuit by electrically connecting the pressure detection element 32, the controller and the excitation power supply. The controller adjusts the excitation current in real time according to the pressure signal in the static pressure chamber 11, so that the oil film stiffness is kept within a stable range. When the working conditions change (such as load fluctuation or speed change), the system can respond quickly and dynamically adjust the pressure flow characteristics of the static pressure chamber 11 to avoid oil film rupture or stiffness reduction, which significantly improves the load stability and motion accuracy of the system.

[0052] (3) This application achieves precise matching between the pressure-flow characteristics of the static pressure chamber 11 and the pressure-flow characteristics of the throttle 20 by dynamically adjusting the pressure-flow characteristics. There is no need to significantly improve the processing accuracy and assembly process requirements to ensure compatibility. Even if there are certain manufacturing and assembly errors, precise matching can be achieved through magnetic control adjustment, which effectively reduces the manufacturing cost and process difficulty of the system and has higher engineering application value.

[0053] (4) In this application, there are multiple static pressure chambers 11 and throttles 20, and each static pressure chamber 11 can be independently equipped with an electromagnetic coil 31 and can be independently controlled. The pressure and flow characteristics of each static pressure chamber 11 can be adjusted differently according to different working conditions. At the same time, it can be used in conjunction with various throttles 20 to achieve better adaptation effect through coordinated adjustment, and has a wide range of applications.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydrostatic guide rail mechanism, characterized in that, include: A slider (10) is provided with a static pressure chamber (11) on at least one side (101) of the slider (10), and an oil hole (12) communicating with the static pressure chamber (11) is provided on the slider (10). Throttling device (20), which is mounted on the slider (10), is used to deliver oil to the static pressure chamber (11) and regulate the pressure of the oil; An adjustment component (30) is disposed on the slider (10) for adjusting the viscosity of the oil.

2. The hydrostatic guide rail mechanism according to claim 1, characterized in that, The oil includes a magnetorheological fluid; The adjustment component (30) includes a magnetic control adjustment component, which includes an electromagnetic coil (31) and an excitation power supply. The excitation power supply is electrically connected to the electromagnetic coil (31). The electromagnetic coil (31) is disposed on the outer surface of the static pressure chamber (11) to adjust the viscosity of the magnetorheological fluid.

3. The hydrostatic guide rail mechanism according to claim 2, characterized in that, The magnetic control adjustment assembly also includes a controller and a pressure detection element (32). The pressure detection element (32) is disposed on the slider (10) to detect the pressure of the magnetorheological fluid in the static pressure chamber (11). The pressure detection element (32), the controller, and the excitation power supply are electrically connected to form a control loop. The controller controls the magnitude of the output current of the excitation power supply according to the pressure signal transmitted by the pressure detection element (32).

4. The hydrostatic guide rail mechanism according to claim 3, characterized in that, The static pressure chamber (11) includes multiple components, and the throttle (20) also includes multiple components; the static pressure chamber (11) and the throttle (20) are arranged in a one-to-one correspondence; and / or, The throttle (20) includes a fixed throttle or a variable throttle. When the throttle (20) includes a variable throttle, the variable throttle is electrically connected to the controller, and the controller is used to adjust the throttle parameters of the variable throttle at least.

5. The hydrostatic guide rail mechanism according to claim 2, characterized in that, The static pressure chamber (11) includes a first sidewall (111), which is parallel to the side (101) on which the static pressure chamber (11) is located on the slider (10). The electromagnetic coil (31) is located on the first sidewall (111) and is flush with the first sidewall (111).

6. The hydrostatic guide rail mechanism according to claim 5, characterized in that, The electromagnetic coil (31) is spirally arranged on the first sidewall (111), and the spacing between two adjacent coils of the electromagnetic coil (31) is equal.

7. The hydrostatic guide rail mechanism according to claim 5, characterized in that, The electromagnetic coil (31) is disposed on the first sidewall (111) by sealant and is flush with the first sidewall (111).

8. The hydrostatic guide rail mechanism according to claim 2, characterized in that, An insulating coating is provided on the inner wall surface of the static pressure chamber (11), and the insulating coating covers the electromagnetic coil (31).

9. A device, characterized in that, The device includes the hydrostatic guide rail mechanism as described in any one of claims 1 to 8.

10. A control method for a hydrostatic guide rail mechanism, characterized in that, The control method for the hydrostatic guide rail mechanism is used to control the hydrostatic guide rail mechanism according to any one of claims 1 to 8, and the control method for the hydrostatic guide rail mechanism includes: The pressure in the static pressure chamber (11) is detected in real time. When the pressure in the static pressure chamber (11) is compared with the preset pressure value to obtain the pressure deviation, when the pressure deviation is greater than or less than the predetermined deviation range, the viscosity of the oil is adjusted by the adjustment component (30) until the pressure deviation is within the predetermined deviation range.

11. The control method for the hydrostatic guide rail mechanism according to claim 10, characterized in that, When the pressure deviation exceeds the predetermined deviation range, the viscosity of the oil is adjusted using the adjusting component (30) to reduce the viscosity of the oil; and / or, When the pressure deviation is less than the predetermined deviation range, the viscosity of the oil is adjusted by the adjustment component (30) to increase the viscosity of the oil.

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