A gas-oil hybrid hydrostatic guideway carriage

Abstract

The present invention discloses a gas-oil hybrid hydrostatic guideway carriage, comprising: a carriage body in clearance fit with the guideway plane, and a throttling pipeline arranged in the carriage body. The throttling pipeline includes at least one throttling oil pipeline and at least two throttling gas pipelines. The throttling oil pipeline is located between two adjacent throttling gas pipelines, and a partition groove is further arranged between the throttling oil pipeline and the throttling gas pipelines. A plurality of throttling holes penetrating through the bottom plane of the carriage body are arranged on both the throttling oil pipeline and the throttling gas pipelines. By the above method, the present invention can achieve gas-oil hybrid lubrication in one carriage; meanwhile, the series connection of the oil film area and the gas film area can be effectively blocked, thereby improving the bearing capacity and stiffness of the guideway system.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrostatic guideways, and particularly to an air-oil hybrid hydrostatic guideway carriage. Background Art

[0002] With the vigorous development of frontier technologies such as China's national defense industry, aerospace, and electronic technology, the requirements for the accuracy of ultra-precision machining and ultra-precision measurement equipment are becoming increasingly stringent. Developing ultra-precision machining and detection technologies has become an important development direction in the current machinery industry.

[0003] In ultra-precision machining and detection equipment, extremely high requirements are put forward for the high speed and high motion accuracy of moving components. A hydrostatic air guideway is a sliding guideway that uses a pressure pump to forcibly pump high-pressure air into the tiny gap between the carriage and the guideway. Due to its small friction coefficient, long service life, and uniform temperature distribution, it is widely used in the motion systems of ultra-precision machining and detection equipment.

[0004] The air hydrostatic guideway uses air for lubrication. However, due to the compressible characteristics of gas, its load-carrying capacity and stiffness are relatively low. The air-liquid hybrid lubrication method has become a feasible solution. Since the carriage is an important component of the hybrid lubrication guideway, new requirements are also put forward for the structure and function of the carriage. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide an air-oil hybrid hydrostatic guideway carriage, through which gas or oil can enter the gap between the guideway and the carriage through the pipelines in the carriage to form an air film / oil film for lubricating and supporting the guideway.

[0006] To solve the above technical problem, a technical solution adopted by the present invention is: providing an air-oil hybrid hydrostatic guideway carriage, including: a carriage body in clearance fit with the guideway plane, and a throttle pipeline opened in the carriage body. The throttle pipeline includes at least one throttle oil pipeline and at least two throttle gas pipelines. The throttle oil pipeline is located between two adjacent throttle gas pipelines, and a partition groove is also provided between the throttle oil pipeline and the throttle gas pipelines. A plurality of throttle holes penetrating the bottom plane of the carriage body are provided on both the throttle oil pipeline and the throttle gas pipelines.

[0007] In a preferred embodiment of the present invention, the throttle gas pipelines are connected to the same intake pipe, and the throttle gas pipelines and the intake pipe are perpendicularly distributed to each other.

[0008] In a preferred embodiment of the present invention, there are two throttle gas pipelines and one throttle oil pipeline. The throttle oil pipeline is located in the middle of the carriage body, and the throttle gas pipelines are symmetrically distributed on both sides of the throttle oil pipeline and are parallel to the throttle oil pipeline.

[0009] In a preferred embodiment of the present invention, there are a total of fifteen throttle holes, five of which are evenly distributed on the throttle oil pipeline, and five are also evenly distributed on each throttle gas pipeline.

[0010] In a preferred embodiment of the present invention, an oil throttle is provided at the orifice of the throttle hole on the throttle oil pipeline, and a gas throttle is provided at the orifice of the throttle hole on the throttle gas pipeline.

[0011] In a preferred embodiment of the present invention, the aperture of the oil throttle hole on the oil throttle is 0.3 mm, and the aperture of the gas throttle hole on the gas throttle is 0.1 mm.

[0012] In a preferred embodiment of the present invention, there is also an oil-gas recovery pipeline, which is arranged above the partition groove and is parallel to the throttle oil pipeline and the throttle gas pipeline.

[0013] In a preferred embodiment of the present invention, oil-gas return holes are evenly distributed on the oil-gas recovery pipeline.

[0014] In a preferred embodiment of the present invention, there are two oil-gas recovery pipelines, a total of ten oil-gas return holes, and five oil-gas return holes are evenly distributed on each oil-gas recovery pipeline.

[0015] In a preferred embodiment of the present invention, the oil-gas recovery pipeline is connected to an oil storage tank through an external pipeline, and a vacuum pump and an oil-gas separator are provided on the external pipeline.

[0016] The beneficial effects of the present invention are as follows: By arranging a throttle oil pipeline and a throttle gas pipeline in the slide plate body and opening throttle holes on the pipelines, an oil film area and a gas film area are simultaneously formed in the gap between the slide plate and the guide rail, that is, gas-oil mixed lubrication can be realized in one slide plate; at the same time, a partition groove is arranged between the throttle oil pipeline and the throttle gas pipeline, and the pressure in the partition groove area is reduced and it is difficult to form static pressure, which can effectively block the series connection of the oil film area and the gas film area to ensure the operation stability of the guide rail system;

[0017] In addition, the present invention also arranges an oil-gas recovery pipeline, sucks out the dissipated oil-gas by means of micro-vacuum, avoids setting an oil storage tank, and can form a vacuum preload between the guide rail and the slide plate, thereby improving the rigidity of the guide rail system. Brief Description of the Drawings

[0018] Figure 1 is a cross-sectional view of the slide plate of the gas-oil hybrid hydrostatic guide rail of the present invention;

[0019] Figure 2 is Figure 1 a partial enlarged view of

[0020] Figure 3 Yes Figure 1 is the sectional view taken along the A-A section shown in the figure;

[0021] The markings of each component in the attached drawings are as follows: 1. Saddle body, 2. Throttle oil pipeline, 3. Throttle air pipeline, 21 / 31. Throttle orifice, 22. Oil film area, 32. Air film area, 23. Oil throttle, 33. Air throttle, 4. Partition groove, 5. Inlet pipe, 6. Oil-gas recovery pipeline, 61. Oil-gas return hole, 7. External pipeline, 8. Oil storage tank, 9. Vacuum pump, 10. Oil-gas separator. Specific embodiments

[0022] The following will elaborate on the preferred embodiments of the present invention in conjunction with the attached drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0023] Please refer to Figures 1 to 3 , the present invention includes:

[0024] An air-oil hybrid hydrostatic guide saddle, comprising: a saddle body 1 that is in clearance fit with the guide rail plane, and a throttle pipeline opened in the saddle body 1. The throttle pipeline includes at least one throttle oil pipeline 2 and at least two throttle air pipelines 3. The throttle oil pipeline 2 is located between two adjacent throttle air pipelines 3. A plurality of throttle orifices 21, 31 penetrating the bottom plane of the saddle body 1 are opened on the throttle oil pipeline 2 and the throttle air pipeline 3. Lubricating oil film areas 22 and air film areas 32 are formed in the gap between the guide rail and the saddle by means of small hole throttling;

[0025] As Figure 1 , Figure 2 shown, a partition groove 4 is further provided between the throttle oil pipeline 2 and the throttle air pipeline 3. The partition groove 4 is a groove opened on the bottom plane of the saddle body 1. The high-pressure lubricating oil in the throttle oil pipeline 2 is output from the throttle orifice 21 at a certain pressure and is dispersed to both sides with the throttle orifice 21 as the center to form an oil film area 22. When the high-pressure lubricating oil is dispersed to the partition groove area, since the contact area between the lubricating oil and the partition groove 4 increases, the lubricating oil pressure in the partition groove area decreases and it is difficult to form hydrostatic pressure, so an oil film cannot be formed in the partition groove area; similarly, the high-pressure air in the throttle air pipeline 3 is output from the throttle orifice 31 at a certain pressure and is dispersed to both sides with the throttle orifice 31 as the center to form an air film area 32. When the high-pressure air is dispersed to the partition groove area, since the contact area between the high-pressure air and the partition groove 4 increases, the air pressure in the partition groove area decreases and it is difficult to form hydrostatic pressure, so an air film cannot be formed in the partition groove area; therefore, in this embodiment, by setting the partition groove 4, the series connection of the oil film area 22 and the air film area 32 can be effectively blocked to ensure the operation stability of the guide rail system.

[0026] Continue to refer to Figure 2 , in this embodiment, the throttle gas pipeline 3 is connected to the same intake pipeline 5, and the throttle gas pipeline 3 and the intake pipeline 5 are vertically distributed with respect to each other.

[0027] Specifically, there are two throttle gas pipelines 3, one throttle oil pipeline 2, the throttle oil pipeline 2 is located in the middle of the carriage body 1, and the throttle gas pipelines 3 are symmetrically distributed on both sides of the throttle oil pipeline 2 and are parallel to the throttle oil pipeline 2.

[0028] There are a total of fifteen throttle holes 21 and 31. Five throttle holes 21 are evenly distributed on the throttle oil pipeline 2, and five throttle holes 31 are also evenly distributed on each throttle gas pipeline 3;

[0029] Moreover, an oil throttle 23 is installed at the orifice of the throttle hole 21 on the throttle oil pipeline 2, and a gas throttle 33 is installed at the orifice of the throttle hole 31 on the throttle gas pipeline 3.

[0030] According to theoretical calculations, the parameters of the hydrostatic guide are related to the characteristics Fg of the lubricating fluid, the fluid supply pressure Fp, and the throttle hole size factor Fd. Therefore, in this solution, a unified diameter of the throttle oil pipeline 2 and the throttle gas pipeline 3 is adopted, and replaceable oil throttles 23 and gas throttles 33 are configured to achieve a hydrostatic lubricating layer, and by adjusting the intake air and oil pressures, the smooth running of the carriage is finally achieved. In this embodiment, the aperture of the oil throttle hole on the oil throttle 23 is 0.3 mm, and the aperture of the gas throttle hole on the gas throttle 33 is 0.1 mm.

[0031] Continue to refer to Figure 1 and Figure 2 , the gas-oil hybrid hydrostatic guide carriage further includes an oil-gas recovery pipeline 6, the oil-gas recovery pipeline 6 is arranged above the partition groove 4, and is parallel to the throttle oil pipeline 2 and the throttle gas pipeline 3;

[0032] The oil-gas recovery pipeline 6 is evenly provided with oil-gas return holes 61, the oil-gas return holes 61 penetrate through the partition groove 4, and the dissipated oil and gas flow back to the oil-gas recovery pipeline 6 through the oil-gas return holes 61.

[0033] In this embodiment, there are two oil-gas recovery pipelines 6, there are a total of ten oil-gas return holes 61, and five oil-gas return holes 61 are evenly distributed on each oil-gas recovery pipeline 6.

[0034] The 6-way oil and gas recovery pipe is connected to the oil storage tank 8 through the external pipe 7, and a vacuum pump 9 and an oil and gas separator 10 are installed on the external pipe 7. The vacuum pump 9 is installed on the external pipe 7 connected to the oil and gas recovery pipeline 6. On the one hand, the vacuum pump 9 can generate a vacuum degree of about 1 mba to suck out the recovered oil and gas, and the oil and gas are separated through the oil and gas separator 10, and the oil is recovered into the oil storage tank 8. On the other hand, the vacuum pump 9 is used to evacuate the space between the slide body 1 and the guide rail plane, and a vacuum preload can be formed between the guide rail and the slide body 1, thereby improving the rigidity of the guide rail system.

[0035] In summary, the present invention can achieve gas-oil mixed lubrication in a single slide; at the same time, a partition groove is provided between the throttle oil pipeline and the throttle gas pipeline, and the pressure in the partition groove area is reduced, making it difficult to form static pressure, which can effectively block the series connection between the oil film area and the gas film area;

[0036] In addition, the present invention also provides an oil and gas recovery pipeline, which sucks out the dissipated oil and gas by means of a micro-vacuum, avoids setting up an oil storage tank, and can form a vacuum preload between the guide rail and the slide, thereby improving the rigidity of the guide rail system.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included within the patent protection scope of the present invention.

Claims

1. A gas-oil hybrid hydrostatic guideway carriage, comprising: The sliding plate body (1) with a clearance fit with the guide rail plane, and a throttling pipeline arranged in the sliding plate body (1), characterized in that the throttling pipeline comprises at least one throttling oil pipeline (2) and at least two throttling gas pipelines (3), the throttling oil pipeline is located between two adjacent throttling gas pipelines, and a partition groove (4) is further arranged between the throttling oil pipeline and the throttling gas pipelines. A plurality of throttling holes (21, 31) penetrating through the bottom plane of the sliding plate body (1) are arranged on the throttling oil pipeline (2) and the throttling gas pipelines (3). A lubricating oil film area (22) and a gas film area (32) are formed in the gap between the guide rail and the sliding plate in a way of small hole throttling.

2. The air-oil hybrid hydrostatic guideway carriage according to claim 1, characterized in that, The throttling gas pipelines (3) are communicated with the same air inlet pipe (5), and the throttling gas pipelines (3) and the air inlet pipe (5) are vertically distributed with respect to each other.

3. The air-oil hybrid hydrostatic guideway carriage according to claim 2, wherein, There are two throttling gas pipelines (3) and one throttling oil pipeline (2). The throttling oil pipeline (2) is located in the middle of the sliding plate body (1), and the throttling gas pipelines (3) are symmetrically distributed on both sides of the throttling oil pipeline (2) and are parallel to the throttling oil pipeline (2).

4. The air-oil hybrid hydrostatic guideway carriage according to claim 3, characterized in that, There are a total of fifteen throttling holes (21, 31), five of which are evenly distributed on the throttling oil pipeline (2), and five are also evenly distributed on each throttling gas pipeline (3).

5. The air-oil hybrid hydrostatic guideway carriage according to claim 4, characterized in that, An oil throttle (23) is arranged at the orifice of the throttling hole (21) on the throttling oil pipeline (2), and a gas throttle (33) is arranged at the orifice of the throttling hole (31) on the throttling gas pipeline (3).

6. The air-oil hybrid hydrostatic guideway carriage according to claim 5, wherein, The aperture of the oil throttling hole on the oil throttle (23) is 0.3 mm, and the aperture of the gas throttling hole on the gas throttle (33) is 0.1 mm.

7. The air-oil hybrid hydrostatic guideway carriage according to any one of claims 1 to 6, characterized in that, An oil and gas recovery pipeline (6) is further included. The oil and gas recovery pipeline (6) is arranged above the partition groove (4) and is parallel to the throttling oil pipeline (2) and the throttling gas pipelines (3).

8. The air-oil hybrid hydrostatic guideway carriage according to claim 7, wherein, Oil and gas return holes (61) are evenly distributed on the oil and gas recovery pipeline (6).

9. The air-oil hybrid hydrostatic guideway carriage according to claim 8, characterized in that, There are two oil and gas recovery pipelines (6), and there are a total of ten oil and gas return holes (61), and five oil and gas return holes (61) are evenly distributed on each oil and gas recovery pipeline (6).

10. The air-oil hybrid hydrostatic guideway carriage according to claim 8, characterized in that, The oil and gas recovery pipeline (6) is connected to an oil storage tank (8) through an external pipeline (7), and a vacuum pump (9) and an oil and gas separator (10) are arranged on the external pipeline (7).

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