A static pressure horizontal slide table with I-shaped structure

Abstract

The present invention provides a hydrostatic horizontal slide with an I-shaped structure, comprising a slide plate, a guide rail and a base plate, wherein the cross section of the guide rail is an inverted T-shape, the slide plate is arranged above the guide rail and is fixedly connected to the guide rail by fasteners to form an I-shaped structure, the grooves of the base plate and the I-shaped structure are clearance-matched with each other, and an oil film layer is provided in the gap between the upper surface of the base plate and the lower surface of the slide plate and between the lower surface of the base plate and the upper surface of the guide rail, and the I-shaped structure slides on the oil film layer. The hydrostatic horizontal slide of the present invention adopts the above-mentioned I-shaped structure, and uses the bottom surface of the slide plate of the horizontal slide as the oil film bearing area. Within a limited area, the obtained bearing area is the largest, and the same slide plate size can produce a greater bearing capacity, thereby reducing costs and increasing the utilization rate of equipment.

Description

Technical Field

[0001] The invention relates to an electric vibration table in mechanical environment testing equipment, in particular to a static pressure type horizontal sliding table with an I-shaped structure. Background Art

[0002] The purpose of vibration test is to artificially simulate in the laboratory the vibration loads that the specimen may be subjected to during transportation, storage and use, as well as the impact on the specimen, and to assess its adaptability. The conventional test method is to use uniaxial vibration test equipment to excite the product in a certain direction. For example, when testing in the vertical direction, the specimen is mounted on the excitation source through a fixture, while the horizontal vibration test is generally connected to the excitation source through a horizontal slide. The load-bearing capacity of the horizontal slide is a very important assessment indicator.

[0003] The basic structure of the common horizontal slide in the prior art is as follows: Figure 1 As shown, the product 1 is placed on the slide plate 2, the slide plate 2 is connected to the "T"-shaped guide rail of the hydrostatic bearing 3, the hydrostatic bearing 3 is installed on the horizontal slide fixed plate 4, the fixed plate 4 is connected to the base of the vibration table, one end of the slide plate 2 is connected to the moving circle of the vibration table through a connector, when high-pressure oil is introduced into the hydrostatic bearing 3, the moving circle of the vibration table pushes the slide plate 2 to drive the "T"-shaped guide rail to slide back and forth freely between the oil film layers of the hydrostatic bearing 3.

[0004] The important index of hydrostatic horizontal slide is load-bearing capacity, which is directly related to the effective load-bearing area of ​​the oil film. In the past, large load-bearing horizontal slides mainly adopted "T" shaped structures, such as Figure 2 The slide plate 2 is connected to the "T" type guide rail 5, and high pressure is injected through the oil injection hole 7 and the oil cavity 8 provided on the hydrostatic bearing, so that the guide rail can freely slide back and forth in the middle of the bearing.

[0005] In the "T"-shaped structure, the effective bearing area of ​​the hydrostatic oil film 9 always depends on the limited guide rail area. The effective bearing area of ​​the oil film is relatively small. When a large load test is required, the capacity is restricted by the effective bearing area. Often, more hydrostatic bearings need to be arranged to meet the requirements. However, the increase in the number of hydrostatic bearings means that the size of the slide area becomes larger and the weight of the slide increases. For the same test requirements, if the thrust loss caused by this part of the weight is to be offset, a vibration table with greater thrust must be used, which greatly increases the procurement cost and maintenance cost of the entire equipment, and reduces the utilization efficiency.

[0006] Therefore, how to solve the deficiencies in the above-mentioned prior art has become an urgent problem to be solved in the present invention. Summary of the invention

[0007] The purpose of the present invention is to provide a static pressure type horizontal slide table with an I-shaped structure, so as to realize horizontal direction tests with greater load-bearing capacity.

[0008] To achieve the above-mentioned purpose, the present invention provides a hydrostatic horizontal slide with an I-shaped structure, comprising a slide plate 2, a guide rail 5 and a base plate 14, wherein the cross-section of the guide rail 5 is an inverted T-shape, the slide plate 2 is arranged above the guide rail 5, and is fixedly connected to the guide rail 5 by fasteners to form an I-shaped structure, the grooves of the base plate 14 and the I-shaped structure are clearance-matched with each other, and an oil film layer is provided in the gap between the upper surface of the base plate 14 and the lower surface of the slide plate 2 and between the lower surface of the base plate 14 and the upper surface of the guide rail 5, and the I-shaped structure slides on the oil film layer.

[0009] Furthermore, an oil filling hole 7 is processed inside the bottom plate 14, and an upper oil cavity 15 and a lower oil cavity 16 are processed on the upper surface and the lower surface of the bottom plate 14 respectively. The oil filling hole 7 connects the upper oil cavity 15 and the lower oil cavity 16 through a pipeline.

[0010] Furthermore, the upper oil chamber 15 and the lower oil chamber 16 are concave oil grooves.

[0011] Furthermore, the number of the upper oil chambers 15 is greater than that of the lower oil chambers 16 .

[0012] Furthermore, the upper oil chamber 15 and the lower oil chamber 16 are evenly distributed on both sides of the I-shaped structure.

[0013] Furthermore, an upper oil film layer 12 is formed between the lower surface of the slide plate 2 and the upper oil cavity 15 , and a lower oil film layer 13 is formed between the upper surface of the guide rail 5 and the lower oil cavity 16 .

[0014] Furthermore, the maximum bearing capacity of the I-shaped hydrostatic horizontal slide is the difference in pressure between the upper oil film layer 12 and the lower oil film layer 13 .

[0015] Furthermore, the I-shaped structures are distributed on the bottom plate 14 in the form of an m*n matrix, wherein m≥0, n≥0, and m and n are not 0 at the same time, preferably, m=n.

[0016] Furthermore, an oil return groove 17 is also provided on the bottom plate 14 , and the oil return groove 17 is provided on a side of the upper oil cavity 15 away from the I-shaped structure.

[0017] Furthermore, the bottom plate 14 is connected to the base of the electric vibration table.

[0018] Beneficial effects of the present invention:

[0019] The hydrostatic horizontal slide of the present invention adopts an I-shaped structure and uses the bottom of the slide plate of the horizontal slide as the oil film bearing area. In this way, the bearing area obtained is maximized within a limited area, and the same slide plate size can produce a greater bearing capacity, reducing costs and increasing equipment utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a horizontal slide in the prior art;

[0021] Figure 2 It is a T-shaped structural diagram of a horizontal slide in the prior art;

[0022] Figure 3 It is a structural schematic diagram of a conventional fuel tank (without a slide plate);

[0023] Figure 4 A cross-sectional view of the I-shaped hydrostatic horizontal slide of the present invention;

[0024] Figure 5 A top view of the guide rail and base plate arrangement of the present invention;

[0025] Among them, 1. product, 2. skateboard, 3. hydrostatic bearing, 4. fixed plate, 5. guide rail, 6. guide rail pair, 7. oil filling hole, 8. oil chamber, 9. hydrostatic oil film, 10. oil frame, 11. oil return hole, 12. upper oil film layer, 13. lower oil film layer, 14. bottom plate, 15. upper oil chamber, 16. lower oil chamber, 17. oil return groove. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0027] Terms such as "upper", "above", "lower", "below", etc. used in this document to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative position may be intended to include different orientations of the device in use or operation other than the orientation shown in the figure. For example, if the device in the figure is turned over, the unit described as being "below" or "beneath" other units or features will be located "above" the other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptive terms used in this document are interpreted accordingly. The following embodiments further illustrate the technical solutions of the present invention.

[0028] Example:

[0029] like Figures 4-5 As shown, the present invention provides a static pressure type horizontal slide table with an I-shaped structure, including a slide plate 2, a guide rail 5 and a bottom plate 14, the cross section of the guide rail 5 is an inverted T-shaped, the slide plate 2 is arranged above the inverted T-shaped guide rail 5, and is fixedly connected to the guide rail 5 by fasteners to form an I-shaped structure, the bottom plate 14 and the grooves of the I-shaped structure are matched with each other in a clearance, and an oil film layer is provided in the gap between the upper surface of the bottom plate 14 and the lower surface of the slide plate 2 and the lower surface of the bottom plate 14 and the upper surface of the guide rail 5, and the oil film layer is used to bear the weight of the test piece and provide lubrication for horizontal sliding. The present invention simulates the horizontal vibration of the vibration table in the test room by using the lower surface of the slide plate 2 of the horizontal slide table and the upper surface of the guide rail 5 as sliding surfaces, and the I-shaped structure moving parts formed by them slide on the oil film layer. Compared with the prior art, the bottom of the slide plate is used as the oil film bearing area. In this way, the bearing area obtained within a limited area is the largest, and the same slide plate size can produce a greater bearing capacity, reduce costs, and increase equipment utilization.

[0030] Specifically, Figure 4 As shown, the bottom plate 14 is processed with an oil filling hole 7 inside, and the upper surface and lower surface of the bottom plate 14 are respectively processed with an upper oil cavity 15 and a lower oil cavity 16, which are concave oil grooves and are evenly distributed on both sides of the I-shaped structure. The hydraulic oil enters the pipeline through the oil filling hole 7, and connects the upper oil cavity 15 and the lower oil cavity 16 through the pipeline. After the hydraulic oil enters the upper and lower oil cavities, an upper oil film layer 12 is formed in the gap between the upper surface of the bottom plate 14 and the lower surface of the slide plate, and a lower oil film layer 13 is formed in the gap between the lower surface of the bottom plate 14 and the upper surface of the guide rail 5, providing a sliding oil film for the sliding surface of the I-shaped structure. Under the action of the oil film layer, there is no mechanical contact between the slide plate and the guide rail and the bottom plate, achieving low friction resistance and no mechanical wear.

[0031] In a preferred embodiment of the present invention, in order to provide more sliding oil film layers for the lower surface of the slide plate, the number of the upper oil chambers 15 is greater than that of the lower oil chambers 16 .

[0032] In the present invention, the pressure formed by the upper oil film layer is W1, and the pressure formed by the lower oil film layer is W2. The maximum bearing capacity W0 of the I-shaped static pressure horizontal slide is the difference between the pressures formed by the upper oil film layer 12 and the lower oil film layer 13, that is, W0 = W1-W2. The pressure formed by the oil film layer is related to the flow resistance in the oil cavity and the effective bearing area of ​​the oil cavity. Under the same conditions, the larger the effective bearing area of ​​the oil cavity, the greater the overall load capacity of the horizontal slide. The present invention uses the bottom of the slide as the oil film bearing area. Within a limited area, the obtained bearing area is the largest. The same slide size can produce a greater bearing capacity, reduce costs, and increase equipment utilization.

[0033] like Figure 5 As shown, the I-shaped structure of the present invention is distributed on the base plate 14 in the form of an m*n matrix, wherein m≥0, n≥0, and m and n are not 0 at the same time, for example: m=0, n=1,2,3……or n=0, m=1,2,3……or m=1,2,3……, n=1,2,3……. Preferably, m=n, forming a square matrix on the base plate. The above-mentioned I-shaped structure is connected to the moving coil of the vibration table as a moving part, and the base plate is connected to the base of the electric vibration table. An oil return groove 17 is also provided on the base plate 14, and the oil return groove 17 is arranged on the side of the upper oil chamber 15 away from the I-shaped structure, and the oil return groove 17 is connected to the oil return hole, which is used to recover the hydraulic oil and improve the reuse rate of the hydraulic oil.

[0034] Comparative Example:

[0035] like Figure 2 and 3 As shown, a hydrostatic horizontal slide includes a slide plate 2, a fixed plate 4, a T-shaped guide rail 5, a guide rail pair 6 and a hydrostatic bearing. The slide plate 2 and the T-shaped guide rail 5 are connected by fasteners. The hydrostatic bearing is provided with an oil filling hole 7. Crude oil enters the pipeline through the oil filling hole 7 and is connected to the oil chamber 8. High-pressure oil is injected into the oil filling hole 7, so that a hydrostatic oil film 9 is formed on the upper and lower surfaces of the guide rail 5. The guide rail 5 can slide back and forth freely on the hydrostatic oil film in the bearing. An oil return hole 11 is also provided on the fixed plate, and an oil frame 10 is also provided on the outer side of the top surface to prevent the hydraulic oil from leaking out.

[0036] In the above-mentioned T-shaped structure, the effective bearing area of ​​the hydrostatic oil film 9 always depends on the limited guide rail area. The effective bearing area of ​​the oil film is relatively small. When a large load test is required, the capacity is restricted by the effective bearing area, and more hydrostatic bearings are often required to meet the requirements. However, the increase in the number of hydrostatic bearings means that the size of the slide area becomes larger and the weight of the slide increases. For the same test requirements, if the thrust loss caused by this part of the weight is to be offset, a vibration table with greater thrust must be used, which greatly increases the procurement cost and maintenance cost of the entire set of equipment, and also reduces the utilization efficiency.

[0037] The present invention directly uses the lower surface of the slide and the upper surface oil cavity of the base plate to form an oil film layer, and the area of ​​the horizontal slide is much larger than the actual area of ​​the guide rail. Therefore, the technical solution described in the present invention gets rid of the inherent structural limitations of the "T"-shaped horizontal slide and increases the load capacity of the slide within the limited area of ​​the horizontal slide.

[0038] It should be pointed out that the above is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included in the scope of protection intended by the present invention.

Claims

1. A hydrostatic horizontal slide with an I-shaped structure, comprising a slide plate (2), a guide rail (5) and a bottom plate (14), characterized in that: The guide rail (5) has an inverted T-shaped cross section, the slide plate (2) is arranged above the guide rail (5) and is fixedly connected to the guide rail (5) by means of fasteners to form an I-shaped structure, the bottom plate (14) and the groove of the I-shaped structure are clearance-matched with each other, and an oil film layer is provided in the gap between the upper surface of the bottom plate (14) and the lower surface of the slide plate (2) and between the lower surface of the bottom plate (14) and the upper surface of the guide rail (5), and the I-shaped structure slides on the oil film layer; The bottom plate (14) is machined with an oil filling hole (7) inside, and the upper surface and lower surface of the bottom plate (14) are respectively machined with an upper oil cavity (15) and a lower oil cavity (16), and the oil filling hole (7) is connected to the upper oil cavity (15) and the lower oil cavity (16) through a pipeline; the number of the upper oil cavities (15) is greater than that of the lower oil cavities (16); The maximum bearing capacity of the I-shaped static pressure horizontal slide is the difference in pressure between the upper oil film layer (12) and the lower oil film layer (13).

2. According to claim 1, the I-shaped hydrostatic horizontal slide is characterized in that: The upper oil chamber (15) and the lower oil chamber (16) are concave oil grooves.

3. The I-shaped hydrostatic horizontal slide according to claim 1, characterized in that: The upper oil chamber (15) and the lower oil chamber (16) are evenly distributed on both sides of the I-shaped structure.

4. The I-shaped hydrostatic horizontal slide according to claim 1, characterized in that: An upper oil film layer (12) is formed between the lower surface of the slide plate (2) and the upper oil chamber (15), and a lower oil film layer (13) is formed between the upper surface of the guide rail (5) and the lower oil chamber (16).

5. The I-shaped hydrostatic horizontal slide according to claim 1, characterized in that: The I-shaped structures are distributed on the bottom plate (14) in the form of an m*n matrix, wherein m≥0, n≥0, and m and n are not 0 at the same time.

6. The I-shaped hydrostatic horizontal slide according to claim 5, characterized in that: m=n.

7. The I-shaped hydrostatic horizontal slide according to claim 1, characterized in that: An oil return groove (17) is also provided on the bottom plate (14), and the oil return groove (17) is arranged on a side of the upper oil cavity (15) away from the I-shaped structure.

8. The I-shaped hydrostatic horizontal slide according to claim 1, characterized in that: The bottom plate (14) is connected to the base of the electric vibration table.

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