Preloaded hydrostatic guideway

Abstract

The application discloses a preloaded hydrostatic guide rail. The preloaded hydrostatic guide rail comprises a base, a slide plate, an air source assembly and an oil supply mechanism. The slide plate is slidably arranged on the base. A static pressure cavity is arranged on the side of a limiting block close to a limiting sliding groove. The slide plate is further provided with an air inlet, an air outlet, an air pressure cavity and at least one air pressure block. The air pressure block is fixedly arranged in the air pressure cavity. The air pressure block comprises a first smooth surface and a second smooth surface. The first smooth surface is located above the second smooth surface. The length of the first smooth surface along the airflow direction in the air pressure cavity is less than the length of the second smooth surface along the airflow direction in the air pressure cavity. The air inlet is in communication with the air pressure cavity and is arranged close to the first end of the air pressure block. The air outlet is in communication with the air pressure cavity and is arranged close to the second end of the air pressure block opposite to the first end. The preloaded hydrostatic guide rail solves the problem of complex structure and difficult manufacturing and adjustment of the preloaded hydrostatic guide rail in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining tools, in particular to a preloaded hydrostatic guide. BACKGROUND

[0002] The hydrostatic guide realizes pure liquid friction by using high-pressure oil film when moving, has the advantages of small wear, high moving precision, long mean time between failures, small driving power, large bearing capacity, good vibration absorption, and stable movement, and is thus widely applied in the field of ultra-precision machining tools and is one of the key components of ultra-precision machine tools. The rigidity of the hydrostatic guide greatly determines the machining precision of the ultra-precision machine tool.

[0003] At present, there are two kinds of commonly used hydrostatic guide assemblies, namely, an open hydrostatic guide assembly and a closed hydrostatic guide assembly. The open hydrostatic guide assembly has a simple structure, but the oil film pressure thereof is determined only by the load, so the oil film rigidity is low and the guide precision is low when the load is small, and the application range is limited. The closed hydrostatic guide assembly provides an initial preloading force in the upper cavity in addition to the load, so the oil film rigidity is greatly improved compared with the open hydrostatic guide assembly, but such a structure is complex and difficult to manufacture and adjust. SUMMARY

[0004] The main purpose of the present application is to provide a preloaded hydrostatic guide to at least solve the problem of complex structure and difficult manufacturing and adjustment of the preloaded hydrostatic guide in the prior art.

[0005] According to one aspect of the present application, a preloaded hydrostatic guide is provided, comprising:

[0006] a base, a limiting sliding groove being arranged on the base;

[0007] a sliding plate, a limiting protrusion being arranged on the sliding plate and matched with the limiting sliding groove, the sliding plate being slidably arranged on the base, a static pressure cavity being arranged on the side of the limiting protrusion close to the limiting sliding groove, an air inlet, an air outlet, an air pressure cavity and at least one air pressure block being further arranged on the sliding plate, the air pressure block being fixedly arranged in the air pressure cavity, the air pressure block comprising a first smooth surface and a second smooth surface, the first smooth surface being located above the second smooth surface, and the length of the first smooth surface along the airflow direction in the air pressure cavity being less than the length of the second smooth surface along the airflow direction in the air pressure cavity, the air inlet being arranged in communication with the air pressure cavity and close to the first end of the air pressure block, and the air outlet being arranged in communication with the air pressure cavity and close to the second end of the air pressure block opposite to the first end;

[0008] an air source assembly connected with the air inlet, for providing airflow to the air pressure cavity at least;

[0009] An oil supply mechanism is provided for supplying oil to the hydrostatic cavity to generate an oil film between the limiting chute and the hydrostatic cavity.

[0010] Further, the first smooth surface comprises one of a flat surface, a concave arc surface and a convex arc surface; and / or,

[0011] The second smooth surface comprises one of a concave arc surface and a convex arc surface.

[0012] Further, the wind pressure cavity and the wind pressure block are both provided in plurality, and the plurality of wind pressure cavities and the plurality of wind pressure blocks are provided in one-to-one correspondence.

[0013] Further, the wind pressure cavity and the wind pressure block are both provided in plurality, and the plurality of wind pressure cavities and the plurality of wind pressure blocks are provided in one-to-one correspondence.

[0014] Further, the air source assembly comprises a plurality of gas passages, the plurality of gas passages and the plurality of wind pressure cavities are in one-to-one correspondence, and each of the gas passages is provided with an adjusting portion for adjusting the flow rate of the gas passage.

[0015] Further, the adjusting portion comprises a solenoid valve.

[0016] Further, the hydrostatic cavity comprises a plurality of hydrostatic cavities, and the preloaded hydrostatic guide rail further comprises a plurality of pressure sensors provided at the plurality of hydrostatic cavities in one-to-one correspondence.

[0017] The preloaded hydrostatic guide rail further comprises a controller electrically connected with the pressure sensor and the adjusting portion, and the controller controls the adjusting portion according to the detection signal of the pressure sensor.

[0018] Further, the wind pressure block is provided on the side wall of the sliding plate, the wind pressure shell is fixedly provided on the side wall of the sliding plate, the wind pressure cavity is provided in the wind pressure shell, and the wind pressure block is located in the wind pressure shell.

[0019] Further, along the airflow direction in the wind pressure cavity, the wind pressure shell is sequentially provided with an air inlet section, an air expansion section and an air passing section along the airflow direction in the wind pressure cavity, the air inlet section is provided with the air inlet, the cross section of the air expansion section increases along the airflow direction in the wind pressure cavity, the cross section area of the air passing section remains unchanged along the airflow direction in the wind pressure cavity, the wind pressure block is provided in the air passing section, and the air outlet is provided on the side of the air passing section away from the air inlet section.

[0020] Further, the wind pressure shell is provided with a mounting portion for connecting the upper surface of the sliding plate and / or the lower surface of the sliding plate.

[0021] Compared with the prior art, the preloaded hydrostatic guide rail disclosed in the application generates a preloading force on the oil film by setting a wind pressure block and a wind pressure cavity and applying Bernoulli's principle. The preloaded hydrostatic guide rail disclosed in the application has a simple structure and is easy to assemble and adjust. Meanwhile, the preloaded hydrostatic guide rail disclosed in the application uses wind pressure instead of traditional hydraulic pressure, so that the oil liquid cannot pollute the sliding plate. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0023] Figure 1 Part structure schematic diagram of the preloaded hydrostatic guide rail disclosed in the application (remove the gas source assembly and oil supply mechanism);

[0024] Figure 2 Bernoulli's principle schematic diagram;

[0025] Figure 3 Structure schematic diagram of the preloaded hydrostatic guide rail disclosed in the application;

[0026] Figure 4 Structure schematic diagram of the wind pressure shell, the wind pressure cavity and the wind pressure block disclosed in the application;

[0027] Figure 5 Structure schematic diagram of the sliding plate and the wind pressure shell disclosed in the application.

[0028] Among them, the above drawings include the following reference signs:

[0029] 10, base; 11, limiting sliding groove; 20, sliding plate; 21, limiting protrusion; 22, wind pressure shell; 23, wind pressure cavity; 24, wind pressure block; 25, air inlet; 26, air outlet; 27, static pressure cavity; 30, workbench; 40, gas source assembly; 41, gas passage; 51, flow controller; 52, pressure gauge; 53, oil tank; 54, oil filter; 55, hydraulic pump; 56, overflow valve; 57, overflow pipeline; 221, air inlet section; 222, air expansion section; 223, air passing section; 224, mounting hole; 225, U-shaped baffle; 241, first smooth surface; 242, second smooth surface; 243, first end; 244, second end. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0032] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the actual proportions used in the fabrication, assembly, and operation of the example embodiments. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail herein. However, the techniques, methods, and apparatus are fully intended to be part of the specification, where appropriate. In all examples shown and discussed herein, any particular value is to be interpreted as merely an example, and not a limitation. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is needed.

[0033] Referring to Figures 1 to 5 As shown, according to the embodiments of the present application, a preloaded hydrostatic guideway is provided. The preloaded hydrostatic guideway comprises a base 10, a slide 20, an air supply assembly 40, and an oil supply mechanism.

[0034] The base 10 is provided with a limit groove 11. The slide plate 20 is provided with a limiting protrusion 21 that is adapted to the limiting slide groove 11. The slide plate 20 is slidably disposed on the base 10. A static pressure chamber 27 is provided on the side of the limiting protrusion 21 near the limiting slide groove 11. The slide plate 20 is also provided with an air inlet 25, an air outlet 26, a wind pressure chamber 23 and at least one wind pressure block 24. The wind pressure block 24 is fixedly disposed in the wind pressure chamber 23. The wind pressure block 24 includes a first smooth surface 241 and a second smooth surface 242. The first smooth surface 241 is located above the second smooth surface 242, and the length of the first smooth surface 241 along the airflow direction in the wind pressure chamber 23 is less than the length of the second smooth surface 242 along the airflow direction in the wind pressure chamber 23. The air inlet 25 is connected to the wind pressure chamber 23 and disposed near the first end 243 of the wind pressure block 24. The air outlet 26 is connected to the wind pressure chamber 23 and disposed near the second end 244 of the wind pressure block 24 opposite to the first end 243. The air supply assembly 40 is connected to the air inlet 25 to provide airflow to the air pressure chamber 23 at least. The oil supply mechanism is used to supply oil to the static pressure chamber 27 at least to create an oil film between the limiting slide 11 and the static pressure chamber 27.

[0035] Specifically, in the operation of the preloaded hydrostatic guide rail of this embodiment, the oil supply mechanism is first activated to supply oil to the hydrostatic chamber 27, so that an oil film appears between the limiting slide groove 11 and the hydrostatic chamber 27. Subsequently, the air source assembly 40 starts to work, and the air source assembly 40 introduces airflow into the air pressure chamber 23. The airflow is divided by the air pressure block 24 in the air pressure chamber 23 and flows through the first smooth surface 241 and the second smooth surface 242 respectively. As shown in the attached figure. Figure 2 As shown, when equal masses of gas pass through the attached Figure 2 When two convex surfaces converge, the airflow velocity is higher over the upper convex surface because its length along the airflow direction is greater than that of the lower convex surface. According to Bernoulli's principle, faster airflow results in lower pressure, and slower airflow results in higher pressure. Therefore, when the two airflows converge, an effect is produced as shown below. Figure 2 The upward lifting force is shown. Therefore, since the length of the first smooth surface 241 along the airflow direction within the pressure chamber 23 is less than the length of the second smooth surface 242 along the airflow direction within the pressure chamber 23, the airflow velocity through the first smooth surface 241 is slow, resulting in high pressure; conversely, the airflow velocity through the second smooth surface 242 is fast, resulting in low pressure. The airflows flowing through the first smooth surface 241 and the second smooth surface 242 then converge. Due to the pressure difference between the two airflows, and the higher pressure of the airflow flowing through the first smooth surface 241 than that flowing through the second smooth surface 242, a downward pressure appears at the convergence point along the direction from the first smooth surface 241 to the second smooth surface 242. This downward pressure is transmitted to the slide plate 20 and then to the oil film, creating a preload on the oil film to enhance its stiffness.

[0036] Compared with the prior art, the preloaded hydrostatic guide rail of the embodiment can generate a preloading force on the oil film by setting the air pressure block 24 and the air pressure cavity 23 and applying the Bernoulli principle. The preloaded hydrostatic guide rail of the embodiment is simple in structure and easy to assemble and adjust. Meanwhile, the preloaded hydrostatic guide rail of the embodiment can avoid the pollution of the oil to the slide plate 20 by using the air pressure belt to replace the traditional hydraulic pressure.

[0037] Further, the first smooth surface 241 includes one of a flat surface, a concave arc surface and a convex arc surface. Alternatively, the second smooth surface 242 includes one of a concave arc surface and a convex arc surface.

[0038] Specifically, when the length of the first smooth surface 241 along the airflow flow direction in the air pressure cavity 23 is less than the length of the second smooth surface 242 along the airflow flow direction in the air pressure cavity 23, the first smooth surface 241 can be a flat surface, a concave arc surface or a convex arc surface, and the second smooth surface 242 can be a concave arc surface or a convex arc surface. In one specific embodiment, the first smooth surface 241 is a flat surface, and the second smooth surface 242 is a convex arc surface, so as to ensure that the airflow flowing through the first smooth surface 241 has a smaller flow rate than the airflow flowing through the second smooth surface 242.

[0039] Further, the air pressure cavity 23 and the air pressure block 24 are both provided in multiple numbers, and the multiple air pressure cavities 23 and the multiple air pressure blocks 24 are correspondingly arranged.

[0040] Specifically, the arrangement of the multiple air pressure blocks 24 and the multiple air pressure cavities 23 can avoid the problem that the oil film between the limiting sliding groove 11 and the static pressure cavity 27 has inconsistent load when the workbench 30 on the slide plate 20 is placed with an irregularly shaped workpiece. In the embodiment, the multiple air pressure blocks 24 and the multiple air pressure cavities 23 are arranged to apply a downward pressure to each part of the slide plate 20, so that the load on the oil film at each part is the same.

[0041] Further, the air pressure cavity 23 and the air pressure block 24 are both provided in an even number, and the air pressure cavity 23 and the air pressure block 24 are both symmetrically arranged on opposite sides of the slide plate 20.

[0042] In the embodiment, the multiple air pressure cavities 23 and the multiple air pressure blocks 24 can be arranged to adjust the load on the oil film at each part, and the symmetric arrangement of the air pressure cavity 23 and the air pressure block 24 can make the preloading force applied by the air pressure cavity 23 to the oil film at each part consistent, that is, when the preloading force is applied to the oil film, the air flow is introduced into the multiple pairs of symmetrically arranged air pressure cavities 23, so that the load on the oil film at the static pressure cavity 27 corresponding to each pair of air pressure cavities 23 is the same. In one specific embodiment, the air pressure cavity 23 and the air pressure block 24 are both provided in four numbers, and are symmetrically arranged on opposite sides of the slide plate 20.

[0043] In addition, the gas source assembly 40 comprises a plurality of gas passages 41, which are in one-to-one correspondence with the plurality of air pressure cavities 23 and are provided with adjusting portions (not shown in the figure) for adjusting the flow of the gas passages 41. That is, the gas source assembly 40 can provide air flow to the plurality of air pressure cavities 23, and when it is necessary to adjust the pre-load force exerted by the air pressure cavities 23 on the oil film, the flow of the air flow in the corresponding air pressure cavity 23 can be adjusted through the adjusting portion to increase or decrease the pre-load force exerted by the air pressure cavity 23 on the oil film.

[0044] Further, the plurality of static pressure cavities 27 are provided with a plurality of pressure sensors (not shown in the figure) in one-to-one correspondence. The pre-loaded liquid static pressure guide rail further comprises a controller (not shown in the figure) electrically connected with the pressure sensors and the adjusting portions, which controls the adjusting portions according to the detection signals of the pressure sensors.

[0045] Specifically, in this embodiment, the pressure sensors detect the load on the oil film between the static pressure cavities 27 and the limiting chute 11 and send the detection data to the controller, which adjusts the flow of the air flow in the corresponding gas passage 41 according to the load on the oil film between the static pressure cavities 27 and the limiting chute 11, so as to adjust the load on the oil film.

[0046] In order to facilitate the adjusting portion to receive the electrical signal and to be remotely operated, the adjusting portion in this embodiment comprises an electromagnetic valve. Specifically, the electromagnetic valve is electrically connected with the controller. When the controller receives the signal sent by the pressure sensor and needs to adjust the air flow of the corresponding air pressure cavity 23, the controller converts the air pressure to be adjusted into an electrical signal after calculation and transmits it to the electromagnetic valve. Then, the electromagnetic valve controls the flow of the air flow in the gas passage 41 to adjust the size of the air pressure in the air pressure cavity 23.

[0047] Further, the side wall of the sliding plate 20 is provided with the air pressure block 24, and the side wall of the sliding plate 20 is fixedly provided with the air pressure shell 22, which is provided with the air pressure cavity 23, and the air pressure block 24 is located in the air pressure shell 22. In this embodiment, the air pressure block 24 is integrally arranged with the sliding plate 20 to enhance the structural stability, and the air pressure block 24 and the air pressure shell 22 are arranged on the side wall of the sliding plate 20, which facilitates the installation of the gas passage 41 on the air pressure shell 22.

[0048] Further, along the direction of the airflow in the wind pressure cavity 23, the wind pressure shell 22 is sequentially provided with an air inlet section 221, an air expansion section 222 and an air passing section 223. The air inlet section 221 is provided with an air inlet 25. The cross section of the air expansion section 222 is sequentially increased. The cross section area of the air passing section 223 remains unchanged. The wind pressure block 24 is arranged in the air passing section 223. The air outlet 26 is arranged on the side of the air passing section 223 away from the air inlet section 221. In a specific embodiment, the air inlet 25 is arranged at the geometric center of the air inlet section 221. The air expansion section 222 is arranged in a funnel shape. The air passing section 223 is arranged in a rectangular shell. The gas passage 41 is connected with the air inlet 25 on the air inlet section 221. When the airflow enters from the air inlet 25, the airflow is uniformly dispersed in the entire air passing section 223 after passing through the air expansion section 222. The structure of the embodiment can make the airflow uniformly flow into the wind pressure cavity 23, thereby avoiding the influence of the airflow speed at different positions in the wind pressure cavity 23 on the downward pressure generated by the vacuum cavity.

[0049] As shown in the accompanying drawings, Figure 4 The wind pressure shell 22 is further provided with a mounting portion for connecting the upper surface of the sliding plate 20 and / or the lower surface of the sliding plate 20. Specifically, the mounting portion is a U-shaped baffle 225 which is sleeved on the air passing section 223 of the wind pressure shell 22 and is provided with a mounting hole 224. The U-shaped baffle 225 can be fixed to the upper surface of the sliding plate 20 or the lower surface of the sliding plate 20 through the mounting hole 224. In a specific embodiment, the U-shaped baffle 225 is connected with the upper surface of the sliding plate 20 and the lower surface of the sliding plate 20 through the mounting hole 224, so that the wind pressure shell 22 is fixedly connected with the upper surface of the sliding plate 20 and the lower surface of the sliding plate 20.

[0050] Further, the oil supply mechanism includes an oil supply pipeline, a flow controller 51, an oil tank 53, oil filters 54, a hydraulic pump 55, a pressure gauge 52 and an overflow valve 56. The oil tank 53 is connected with the flow controller 51 through the oil supply pipeline. The flow controller 51 is connected with the static pressure cavity 27 and is used for controlling the oil flow in the static pressure cavity 27. The oil filters 54 are arranged on the oil supply pipeline in a spaced manner for filtering the oil on the oil supply pipeline to avoid too many impurities in the oil. The hydraulic pump 55 is arranged on the oil supply pipeline between the two oil filters 54 and is used for providing the pressure of the oil. The oil supply pipeline between the oil pump and the oil filters 54 is provided with an overflow pipeline 57 which is connected with the oil tank 53 and is provided with the overflow valve 56.

[0051] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated at 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0052] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0053] The preferred embodiments of the present application have been described above with the purpose of enabling not to limit the scope of protection of the present application, but of enabling a person skilled in the art to make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A preloaded hydrostatic guide rail, characterized in that, include: A base (10) is provided with a limiting groove (11); A slide (20) is provided with a limiting protrusion (21) adapted to the limiting groove (11). The slide (20) is slidably disposed on the base (10). A static pressure chamber (27) is provided on the side of the limiting protrusion (21) near the limiting groove (11). The slide (20) is also provided with an air inlet (25), an air outlet (26), a wind pressure chamber (23), and at least one wind pressure block (24). The wind pressure block (24) is fixedly disposed in the wind pressure chamber (23). The wind pressure block (24) includes a first smooth surface (241) and a second smooth surface (242). 242), the first smooth surface (241) is located above the second smooth surface (242), and the length of the first smooth surface (241) along the airflow direction in the air pressure cavity (23) is less than the length of the second smooth surface (242) along the airflow direction in the air pressure cavity (23). The air inlet (25) is connected to the air pressure cavity (23) and is located near the first end (243) of the air pressure block (24). The air outlet (26) is connected to the air pressure cavity (23) and is located near the second end (244) of the air pressure block (24) opposite to the first end (243). An air source assembly (40) is connected to the air inlet (25) to provide airflow to the air pressure chamber (23); An oil supply mechanism is provided at least for supplying oil to the static pressure chamber (27) to generate an oil film between the limiting slide (11) and the static pressure chamber (27); The sidewall of the slide (20) is provided with the air pressure block (24), and the sidewall of the slide (20) is fixedly provided with the air pressure shell (22). The air pressure shell (22) is provided with the air pressure cavity (23). The air pressure block (24) is located inside the air pressure shell (22). Along the airflow direction inside the air pressure cavity (23), the air pressure shell (22) is provided with an air inlet section (221), an air expansion section (222), and an air passage section (223) in sequence. The air inlet section (221) is provided with the air inlet (25). The cross-section of the air expansion section (222) increases in sequence. The cross-sectional area of ​​the air passage section (223) remains unchanged. The air pressure block (24) is located inside the air passage section (223). The air outlet (26) is located on the side of the air passage section (223) away from the air inlet section (221).

2. The preloaded hydrostatic guide rail according to claim 1, characterized in that, The first smooth surface (241) includes one of three types: a flat surface, a concave arc surface, and a convex arc surface; and / or, The second smooth surface (242) includes either a concave arc surface or a convex arc surface.

3. The preloaded hydrostatic guide rail according to claim 1, characterized in that, The air pressure chamber (23) and the air pressure block (24) are both configured in multiples, and the multiple air pressure chambers (23) and the multiple air pressure blocks (24) are configured in a one-to-one correspondence.

4. The preloaded hydrostatic guide rail according to claim 3, characterized in that, The number of air pressure chambers (23) and air pressure blocks (24) is even, and the air pressure chambers (23) and air pressure blocks (24) are symmetrically arranged on opposite sides of the slide (20).

5. The preloaded hydrostatic guide rail according to claim 3, characterized in that, The gas source assembly (40) includes multiple gas channels (41), which are connected to multiple air pressure chambers (23) in a one-to-one correspondence. Each gas channel (41) is provided with an adjustment part, which is used to adjust the flow rate of the gas channel (41).

6. The preloaded hydrostatic guide rail according to claim 5, characterized in that, The regulating unit includes a solenoid valve.

7. The preloaded hydrostatic guide rail according to claim 5, characterized in that, The static pressure chamber (27) includes multiple chambers, and the preloaded liquid static pressure guide rail also includes multiple pressure sensors, with each pressure sensor corresponding to one of the multiple static pressure chambers (27). The preloaded hydrostatic guide rail also includes a controller, which is electrically connected to both the pressure sensor and the adjustment unit. The controller controls the adjustment unit based on the detection signal from the pressure sensor.

8. The preloaded hydrostatic guide rail according to claim 1, characterized in that, The air pressure shell (22) is also provided with a mounting part, which is used to connect the upper surface of the slide (20) and / or the lower surface of the slide (20).

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