Shock absorber and diesel engine

Abstract

The utility model discloses a shock absorber and a diesel engine, and the shock absorber comprises a spline shaft which is annular, and at least two tooth groove structures are arranged on the outer ring of the spline shaft; the shell assembly is fixed on the spline shaft and forms a closed annular cavity with the spline shaft; the damping assembly is arranged in the cavity, the damping assembly comprises an elastic piece and a middle block, one end of the elastic piece is arranged in the tooth groove structures, the middle block is arranged between every two adjacent tooth groove structures so as to divide the cavity into at least two damping cavities which are communicated with each other, and the middle blocks are fixedly connected with the shell assembly; and the oil and gas feeding and discharging assembly comprises a gas discharging assembly and an oil inlet hole, wherein the gas discharging assembly is arranged on the shell assembly and corresponds to the elastic piece in position, and the oil inlet hole is formed in the spline shaft and communicates with the cavity. The shock absorber is stable in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a shock absorber and a diesel engine. Background Art

[0002] Shock absorbers have good solutions to torsional vibration problems, good elasticity, large elastic element changes, compact structure, safety and reliability, and are suitable for shaft systems with large load changes and torque vibrations. They are mostly used in diesel power units such as ships, internal combustion locomotives, diesel generator sets, heavy vehicles and industrial diesel engine power units. They are used to adjust the natural frequency of torque vibrations in shaft transmission systems and suppress torsional vibrations.

[0003] The existing oil production machine shock absorber adopts the structure of "an adaptive torsional vibration damper and diesel engine" with application number "CN201710992062.9", which includes an inner shell, an outer shell and a resonant body arranged between the inner shell and the outer shell. The resonant body includes a mass block and a constraint spring supporting the mass block between the inner shell and the outer shell. The resonant bodies are arranged in pairs and are symmetrically distributed around the center of the rotation axis.

[0004] However, the existing structure has the following problems:

[0005] A spring is used to achieve shock absorption and stability. Since both ends of the spring are fixed on a mass block or an inner shell or an outer shell, the connection parts at both ends of the spring are easily damaged during use, which affects the service life. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a shock absorber and a diesel engine, the service life of which is stable.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] The first aspect of the utility model provides a shock absorber, comprising:

[0009] A spline shaft, the spline shaft is annular and has at least two tooth groove structures on the outer ring;

[0010] a housing assembly, the housing assembly being fixed on the spline shaft and forming a closed annular cavity with the spline shaft;

[0011] A shock absorbing assembly, the shock absorbing assembly is placed in the cavity, the shock absorbing assembly comprises an elastic sheet with one end placed in the tooth groove structure and an intermediate block placed between two adjacent tooth groove structures to separate the cavity into at least two mutually connected shock absorbing cavities, the intermediate block is fixedly connected to the housing assembly;

[0012] An oil and gas inlet and outlet assembly comprises an air discharge assembly arranged on the housing assembly at a position corresponding to the elastic sheet and an oil inlet hole arranged on the spline shaft and connected to the cavity.

[0013] The second aspect of the utility model provides a diesel engine, comprising a diesel engine and a shock absorber installed on a crankshaft of an oil production machine, wherein the shock absorber is a shock absorber as described in the first aspect.

[0014] The utility model has the following advantages:

[0015] By adopting the structure of this scheme, oil is injected into the cavity through the oil inlet hole. When torsional vibration occurs, relative torsion occurs between the spline groove and the shock absorbing assembly and the housing assembly. The bending of the elastic sheet squeezes the oil from the cavity corresponding to one tooth groove structure through the gap to the cavity corresponding to the other tooth groove structure. The oil generates damping during such a flow process. Appropriate damping can effectively suppress torsional vibration. The shock absorber is generated by liquid dynamic friction. It is not affected by workpiece wear and the stability of the elastic sheet connection and has a stable service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the shock absorber of the utility model;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 The structure diagram of the shock absorber of the utility model is as follows. Figure 1 , where the upper part is a cross-sectional view;

[0020] Figure 4 It is a schematic diagram of the structure of the spline shaft and part of the shock absorbing assembly;

[0021] Figure 5 It is a schematic diagram of the structure of the oil-passing sheet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The first aspect of the utility model provides a shock absorber, such as Figures 1 to 4 As shown, the shock absorber includes a spline shaft 1, a housing assembly, a shock absorbing assembly and an oil and gas inlet and outlet assembly. The spline shaft 1 is annular and has at least two tooth groove structures 11 on the outer ring; the housing assembly is fixed on the spline shaft 1 to form a closed annular cavity with the spline shaft 1; the shock absorbing assembly is placed in the cavity, the shock absorbing assembly includes an elastic sheet 31 and an intermediate block 32, the intermediate block 32 is fixedly connected to the housing assembly and is placed between two adjacent tooth groove structures 11 to separate the cavity into at least two mutually connected shock absorbing cavities, the elastic sheet 31 is placed in the shock absorbing cavity, and one end of the elastic sheet 31 is placed in the tooth groove structure 11; the oil and gas inlet and outlet assembly includes an air release assembly and an oil inlet hole 41, the air release assembly is arranged on the housing assembly at a position corresponding to the elastic sheet 31, that is, corresponding to the position of the shock absorbing cavity; the oil inlet hole 41 is arranged on the spline shaft 1 and communicates with the cavity, so as to facilitate oil injection into the cavity, i.e., the shock absorbing cavity.

[0029] There are many ways to implement the housing assembly. In order to facilitate the maintenance and disassembly of the shock absorber, for example, refer to Figure 2 , including a fastening cylinder 21 placed outside the spline shaft 1, a side plate 22 and a flange plate 23 both connected between the fastening cylinder 21 and the spline shaft 1; the intermediate block 32 is connected to the side plate and the flange plate through fixing bolts 24.

[0030] In order to enhance airtightness and connection stability, each intermediate block 32 is fixed by two fixing bolts 24 .

[0031] Furthermore, in order to improve the air tightness of the shock absorber and avoid oil leakage, sealing rings 5 ​​are provided on the contact surfaces between the spline shaft 1 and the side plate and the flange plate, and on the contact surfaces between the fastening cylinder 21 and the side plate and the flange plate.

[0032] The bleed assembly realizes venting of the cavity when oil is injected into the cavity so that the oil fills the cavity. For ease of operation, the bleed assembly includes a bleed hole provided on the housing and a bleed bolt 42 for closing the bleed hole. The bleed assembly is preferably provided on the side plate 22. In order to enhance the air tightness of the bleed bolt 42 when not bleed, a butterfly elastic washer may be installed on the bleed bolt 42.

[0033] In order to improve the completeness of the exhaust in the cavity, at least two exhaust assemblies are provided and are evenly arranged around the side plate 22. For example, Figure 1 As shown, four deflation components are provided.

[0034] In order to improve the performance of the shock absorber, two elastic sheets 31 are arranged in each tooth groove structure 11, and an oil-passing sheet 33 is arranged between the two elastic sheets 31. The oil-passing sheet 33 is used for oiling, and when the elastic sheet is bent and deformed, the temperature of the elastic sheet is quickly reduced to improve the performance.

[0035] like Figure 5 As shown, the oil passing plate 33 is provided with an oil passing groove 331. In order to further improve the cooling performance, the oil passing groove 331 includes a transverse oil passing groove and a longitudinal oil passing groove, and the oil passing groove 331 is provided on both sides of the oil passing plate 33.

[0036] The second aspect of the utility model provides a diesel engine, comprising a diesel engine and a shock absorber installed on a crankshaft of an oil production machine, wherein the shock absorber is a shock absorber as described in the first aspect.

[0037] The shock absorber can be installed inside or outside the diesel engine and connected to the diesel engine crankshaft through a spline shaft. The connection method between the shock absorber and the diesel engine is prior art, so it is not shown in the diagram of this solution.

[0038] With the above structure, the two adjacent damping chambers can be connected through the gap between the middle block 32 and the spline shaft 1, the gap between the middle block 32 and the fastening cylinder 21, etc. Since the damping gap is small, it is preferred that the position of the oil inlet hole 41 corresponds to the position of the damping chamber to facilitate the oil filling operation.

[0039] Before installing the shock absorber, all oil holes must be cleaned of oil and other impurities. During installation, the shock absorber is installed at the free end of the diesel engine, and the diesel engine crankshaft center provides lubricating oil to the shock absorber through the oil inlet hole 41. After installation, perform cavity bleeding. Remove the bleed bolt 42, and the diesel engine crankshaft center provides lubricating oil to the shock absorber through the oil inlet hole 41. A small amount of oil flows out of the bleed hole, and the air remaining in the shock absorber will be brought out with the oil until the lubricating oil overflows from the continuous drain hole. Install the bleed bolt 42.

[0040] When torque vibration occurs, the spline shaft will be torsionally rotate relative to the housing assembly and the intermediate block 32, and the elastic sheet will bend, squeezing the oil from one damping cavity through the gap to another adjacent damping cavity. The oil generates damping during such flow. By calculating and selecting a certain gap, appropriate damping can be generated, and appropriate damping can effectively suppress torsional vibration.

[0041] Different from other elastic damping torsional vibration dampers, the damping effect of this damper is not generated by mechanical friction, but by fluid dynamic friction, which is not affected by workpiece wear. Therefore, the damping coefficient of this damper is stable during the entire service life.

[0042] This shock absorber can adjust its torsional rigidity by changing the size of the elastic sheet, and adjust its damping by changing the gap between the inner and outer components, so as to achieve the best match. It also has the following advantages:

[0043] Compact structure, that is, for the same effect, its size and weight are the smallest, or for the same size and weight, its effect is the best;

[0044] Easy maintenance;

[0045] The lubricating oil of the diesel engine is used as the damping liquid of the shock absorber, so its performance is stable and its service life is long.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shock absorber, characterized in that: include: A spline shaft (1), the spline shaft (1) being annular and having at least two tooth groove structures (11) arranged on the outer ring; a housing component, the housing component being fixed on the spline shaft (1) and forming a closed annular cavity with the spline shaft (1); a shock absorbing component, the shock absorbing component being disposed in the cavity, the shock absorbing component comprising an elastic sheet (31) having one end disposed in the tooth groove structure (11) and an intermediate block (32) disposed between two adjacent tooth groove structures (11) to separate the cavity into at least two mutually connected shock absorbing cavities, the intermediate block (32) being fixedly connected to the housing component; An oil and gas inlet and outlet assembly comprises an air discharge assembly arranged on the housing assembly at a position corresponding to the elastic sheet (31) and an oil inlet hole (41) arranged on the spline shaft (1) and communicating with the cavity.

2. A shock absorber according to claim 1, characterized in that: The air bleed assembly comprises an air bleed hole arranged on the housing and an air bleed bolt (42) used for closing the air bleed hole.

3. A shock absorber according to claim 1, characterized in that: The housing assembly comprises a fastening cylinder (21) disposed outside the spline shaft (1), a side plate (22) and a flange plate (23) both connected between the fastening cylinder (21) and the spline shaft (1); The middle block (32) is connected to the side plate and the flange plate via fixing bolts (24).

4. A shock absorber according to claim 3, characterized in that: Sealing rings (5) are provided on the contact surfaces between the spline shaft (1) and the side plate and the flange plate, and on the contact surfaces between the fastening cylinder (21) and the side plate and the flange plate.

5. A shock absorber according to claim 3, characterized in that: The air release assembly is arranged on the side plate (22).

6. A shock absorber according to claim 5, characterized in that: At least two of the air release components are provided and are evenly arranged around the side plate (22).

7. A shock absorber according to claim 1, characterized in that: Two elastic sheets (31) are arranged in each tooth groove structure (11), and an oil-passing sheet (33) is arranged between the two elastic sheets (31).

8. A shock absorber according to claim 7, characterized in that: The oil passing sheet (33) is provided with an oil passing groove (331).

9. A shock absorber according to claim 8, characterized in that: The oil passage groove (331) comprises a transverse oil passage groove and a longitudinal oil passage groove, and the oil passage groove (331) is arranged on both sides of the oil passage sheet (33).

10. A diesel engine, comprising a diesel engine and a shock absorber mounted on a crankshaft of an oil production machine, characterized in that: The shock absorber is a shock absorber as described in any one of claims 1 to 9.

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