Model selection method of engine crankshaft damper and engine crankshaft damper

Abstract

The invention discloses a model selection method of an engine crankshaft shock absorber and the engine crankshaft shock absorber, a shock absorber body sleeves the outer peripheral surface of a shock absorber seat, shock absorber seat grooves are annularly formed in the outer peripheral surface of the shock absorber seat at intervals, and shock absorber body grooves corresponding to the shock absorber seat grooves one to one are annularly formed in the inner surface of the shock absorber body at intervals; and the shock absorber seat groove and the shock absorber body groove jointly define a containing cavity for containing the cylindrical spring assembly. The number of the cylindrical spring assemblies is recorded as n, the diameter of each cylindrical spring is recorded as D1, the thickness is recorded as d, the pitch diameter of each cylindrical spring assembly is recorded as D2, and the outer diameter of the shock absorber is recorded as D3; the number of the cylinders is recorded as m, the diameter of the cylinders is recorded as D4, the stroke of the engine is recorded as S, the maximum explosion pressure of the engine is recorded as P, and the diameter of a crank pin is recorded as D5; and the shock absorber accurately matched with the engine is finally selected through a related formula, so that the working reliability of the engine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a selection method of an engine crankshaft damper and an engine crankshaft damper. BACKGROUND

[0002] The diesel engine crankshaft is subjected to a periodically changing torque in size and direction during the working process. When the shafting damper is not reasonably matched, the vibration of the engine will be increased, the wear of the transmission system parts will be aggravated, and even the shaft will be broken, etc. With the continuous improvement of the strengthening degree of the diesel engine, the impact load on the shafting is getting larger and larger, and the matching and evaluation of the damper are particularly important.

[0003] The prior art first determines the performance parameters of the cylinder spring damper through simulation calculation, and then adjusts the structural parameters (such as the number of cylinder spring assemblies, the diameter of the cylinder spring, etc.) of the damper to achieve the performance requirements.

[0004] Since there is no clear quantitative correlation rule between the structural parameters and the main parameters of the diesel engine, when adjusting the structural parameters, there is a lack of corresponding reference basis, and only experience can be relied on to repeatedly match and test. It not only consumes time and cost, but also cannot accurately determine the parameters through quantitative calculation, which easily causes the insufficient matching of the damper and the diesel engine, and further affects the vibration suppression effect of the crankshaft system and reduces the reliability of the operation of the shafting. SUMMARY

[0005] In order to overcome the above-mentioned defects, the first technical problem to be solved by the present application is to provide an engine crankshaft damper, which can realize accurate matching of the damper and the engine and improve the reliability of the engine operation.

[0006] In order to solve the above-mentioned technical problems, the engine crankshaft damper of the present application comprises a damper seat, a cylinder spring assembly and a damper body, the damper body is sleeved on the outer peripheral surface of the damper seat, the outer peripheral surface of the damper seat is annularly and spacedly provided with damper seat grooves, the inner surface of the damper body is annularly and spacedly provided with damper body grooves, the damper seat grooves and the damper body grooves correspond one by one, the damper seat grooves and the damper body grooves jointly enclose a containing cavity for containing the cylinder spring assembly, and the cylinder spring assembly is arranged in the containing cavity.

[0007] Further, the cylinder spring assembly comprises a cylinder spring pin and a cylinder spring, the cylinder spring is in a circular ring structure, and the cylinder spring is provided with an opening, and the cylinder spring pin is inserted into the cylinder spring through the opening.

[0008] Further, the cylinder spring is in interference fit with the damper seat and the damper body, and the cylinder spring is in clearance fit with the cylinder spring pin.

[0009] Further, a cylinder spring pin insertion groove is arranged at the bottom of the damper seat groove.

[0010] Further, the engine crankshaft damper further comprises a first cover plate arranged at one side of the damper seat, and the first cover plate is fixedly connected with the damper seat.

[0011] Further, the engine crankshaft damper further comprises a second cover plate arranged at the other side of the damper seat, and the second cover plate is fixedly connected with the damper seat.

[0012] Further, the engine comprises a body, a crankshaft and a cylinder are arranged on the body, and the engine crankshaft damper is arranged on the crankshaft.

[0013] Based on the same inventive concept, a second technical problem to be solved by the present application is to provide a selection method of an engine crankshaft damper, and the engine crankshaft damper selected by the selection method of the engine crankshaft damper can realize accurate matching between the damper and the engine, and improve the reliability of the engine.

[0014] The selection method of the engine crankshaft damper is used to select the engine crankshaft damper as described above;

[0015] S1, parameters of the engine crankshaft damper are determined, the number of the cylinder spring assemblies is denoted as n, the diameter of the cylinder spring is denoted as D1, the thickness of the cylinder spring is denoted as d, the pitch circle diameter of all the cylinder spring assemblies is denoted as D2, and the outer diameter of the engine crankshaft damper is denoted as D3;

[0016] S2, parameters of the engine are determined, the number of the cylinders is denoted as m, the diameter of the cylinder is denoted as D4, the stroke of the engine is denoted as S, the maximum explosion pressure of the engine is denoted as P, and the diameter of the crankpin of the crankshaft is denoted as D5;

[0017] S3, the engine crankshaft damper is selected by the following formula: n=(1.6~2.1)*P*D4*m / D5 / S;

[0018] d=(0.45~0.5)D1;

[0019] D1=(0.4~0.5)D4;

[0020] D2=(2~2.2)D4;

[0021] D3=D2+(1.5~1.8)D1;

[0022] Finally, the engine crankshaft damper matched with the engine is selected.

[0023] Further, in step S3, n=1.8*P*D4*m / D5 / S;

[0024] d=0.47D1;

[0025] D1=0.45D4;

[0026] D2=2.1D4;

[0027] D3=D2+1.7D1.

[0028] After the above technical scheme is adopted, the beneficial effects of the present application are that the engine crankshaft damper comprises a damper seat, a cylinder spring assembly and a damper body, the damper body is sleeved on the outer circumferential surface of the damper seat, the outer circumferential surface of the damper seat is annularly and spacedly provided with damper seat grooves, the inner surface of the damper body is annularly and spacedly provided with damper body grooves, the damper seat grooves and the damper body grooves correspond one by one, the damper seat grooves and the damper body grooves jointly enclose an accommodating cavity for accommodating the cylinder spring assembly, and the cylinder spring assembly is arranged in the accommodating cavity. The number of the cylinder spring assemblies is denoted as n, the diameter of the cylinder spring is denoted as diameter D1, the thickness of the cylinder spring is denoted as d, the pitch circle diameter of all the cylinder spring assemblies is denoted as D2, and the outer diameter of the engine crankshaft damper is denoted as D3; the number of the cylinders is denoted as m, the diameter of the cylinder is denoted as D4, the stroke of the engine is denoted as S, the maximum explosion pressure of the engine is denoted as P, and the diameter of the crankpin of the crankshaft is denoted as D5; the engine crankshaft damper is selected by the following formula: n=(1.6~2.1)*P*D4*m / D5 / S; d=(0.45~0.5)D1; D1=(0.4~0.5)D4; D2=(2~2.2)D4; D3=D2+(1.5~1.8)D1; and finally the engine crankshaft damper precisely matched with the engine is selected, thereby improving the reliability of the engine work. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is an exploded view of the engine crankshaft damper of the present application;

[0030] Figure 2 is a perspective view of the engine crankshaft damper of the present application;

[0031] Figure 3 is a structural schematic view of the engine crankshaft damper of the present application;

[0032] Figure 4 is Figure 3 a sectional view in the direction of A-A in FIG.

[0033] Figure 5 is a perspective view of the engine crankshaft damper and the crankshaft of the present application;

[0034] Figure 6 is a structural schematic diagram of an engine;

[0035] In the figure: 1, engine body; 2, damper seat; 21, damper seat groove; 22, cylinder spring pin insertion groove; 3, damper body; 31, damper body groove; 4, cylinder spring pin; 5, cylinder spring; 6, first cover plate; 7, second cover plate; 8, bolt; 9, cylinder; 10, crankshaft. DETAILED DESCRIPTION

[0036] The present application will be further described below in conjunction with the accompanying drawings and examples.

[0037] Example 1:

[0038] In conjunction with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 together, the present embodiment discloses an engine crankshaft damper, which comprises a damper seat 2, a cylinder spring assembly and a damper body 3. The damper body 3 is sleeved on the outer circumferential surface of the damper seat 2, the outer circumferential surface of the damper seat 2 is provided with damper seat grooves 21 arranged in an annular interval, the inner surface of the damper body 3 is provided with damper body grooves 31 arranged in an annular interval, the damper seat grooves 21 and the damper body grooves 31 correspond one by one, the damper seat grooves 21 and the damper body grooves 31 together enclose a containing cavity for containing the cylinder spring assembly, and the cylinder spring assembly is arranged in the containing cavity.

[0039] Preferably, the cylinder spring assembly comprises a cylinder spring pin 4 and a cylinder spring 5, the cylinder spring 5 is of a circular ring structure, and the cylinder spring 5 is provided with an opening, and the cylinder spring pin 4 is inserted into the inside of the cylinder spring 5 through the opening.

[0040] Preferably, the cylinder spring 5 is in interference fit with the damper seat 2 and the damper body 3, and the cylinder spring 5 is in clearance fit with the cylinder spring pin 4.

[0041] Further preferably, the groove bottom of the damper seat groove 21 is provided with a cylinder spring pin insertion groove 22, and the cylinder spring pin 4 is inserted into the cylinder spring pin insertion groove 22.

[0042] Preferably, the engine crankshaft damper further comprises a first cover plate 6, the first cover plate 6 is arranged on one side of the damper seat 2, and the first cover plate 6 is fixedly connected with the damper seat 2.

[0043] Preferably, the engine crankshaft damper further comprises a second cover plate 7, the second cover plate 7 is arranged on the other side of the damper seat 2, and the second cover plate 7 is fixedly connected with the damper seat 2.

[0044] The first cover plate 6, the damper seat 2 and the second cover plate 7 are fixedly connected by the bolt 8.

[0045] Preferably, the engine comprises a body 1, on which a crankshaft 10 and a cylinder 9 are arranged, and the engine crankshaft damper is mounted on the crankshaft 10. The specific mounting position and mounting process of the engine crankshaft damper mounted on the crankshaft 10 are known to those skilled in the art, and will not be described here.

[0046] Embodiment two:

[0047] The embodiment discloses a selection method of an engine crankshaft damper, and the selection method of the engine crankshaft damper of the embodiment is used to select the engine crankshaft damper precisely matched with the engine in embodiment one.

[0048] Specifically, S1, parameters of the engine crankshaft damper are determined: the number of cylinder spring assemblies is denoted as n, the diameter of the cylinder spring 5 is denoted as D1, the thickness of the cylinder spring 5 is denoted as d, the pitch circle diameter of all cylinder spring assemblies is denoted as D2, and the outer diameter of the engine crankshaft damper is denoted as D3;

[0049] S2, parameters of the engine are determined: the number of cylinders 9 is denoted as m, the diameter of the cylinder 9 is denoted as D4, the stroke of the engine is denoted as S, the maximum explosion pressure of the engine is denoted as P, and the diameter of the crankpin of the crankshaft 10 is denoted as D5;

[0050] S3, the engine crankshaft damper is selected by the following formula: n = (1.6~2.1) * P * D4 * m / D5 / S;

[0051] d = (0.45~0.5) D1;

[0052] D1 = (0.4~0.5) D4;

[0053] D2 = (2~2.2) D4;

[0054] D3 = D2 + (1.5~1.8) D1;

[0055] Finally, the engine crankshaft damper matched with the engine is selected.

[0056] Preferably, in step S3, n = 1.8 * P * D4 * m / D5 / S;

[0057] d = 0.47 D1;

[0058] D1 = 0.45 D4;

[0059] D2 = 2.1 D4;

[0060] D3 = D2 + 1.7 D1.

[0061] The units of D1, D2, D3, D4, D5, d and S are all mm. The unit of P is bar.

[0062] The explicit quantitative constraint formula of the parameters of the engine and the parameters of the engine crankshaft damper is established, which replaces the traditional experience parameter selection, and realizes the precise matching of the engine crankshaft damper and the engine.

[0063] The constraint range of each damper parameter corresponds to the specific performance requirement of the shafting, and ensures that the parameter design directly serves the core target of the reliability of the shafting. Through the parameter constraint, the required performance requirement of the shafting is directly guaranteed, and the operation reliability of the shafting is effectively improved.

[0064] The technical features with serial number naming (such as the first cover plate, the second cover plate, etc.) involved in the specification are only used to distinguish various technical features, and do not represent the positional relationship, installation sequence and working sequence between the technical features.

[0065] In the description of the specification, it should be understood that the orientation or positional relationship described by "outer peripheral surface", "one side", "the other side" and the like is based on the orientation or positional relationship shown in the drawings, and is only used for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0066] The present application is not limited to the above-mentioned specific embodiments, and various modifications made by those skilled in the art based on the above concept without creative labor all fall within the protection scope of the present application.

Claims

1. An engine crankshaft vibration damper, characterized in that, The device includes a damper seat, a spring assembly, and a damper body. The damper body is sleeved on the outer circumferential surface of the damper seat. The outer circumferential surface of the damper seat is provided with damper seat grooves at intervals in an annular pattern. The inner surface of the damper body is provided with damper body grooves at intervals in an annular pattern. The damper seat grooves and the damper body grooves correspond one-to-one. The damper seat grooves and the damper body grooves together form a receiving cavity for accommodating the spring assembly. The spring assembly is disposed in the receiving cavity.

2. The engine crankshaft vibration damper as described in claim 1, characterized in that, The spring assembly includes a spring pin and a spring. The spring has a circular structure and an opening. The spring pin is inserted into the spring through the opening.

3. The engine crankshaft vibration damper as described in claim 2, characterized in that, The spring is interference-fitted with both the damper seat and the damper body, while the spring is clearance-fitted with the spring pin.

4. The engine crankshaft vibration damper as described in claim 3, characterized in that, The bottom of the groove of the damper seat is provided with a spring pin insertion groove, and the spring pin is inserted into the spring pin insertion groove.

5. The engine crankshaft vibration damper as described in claim 4, characterized in that, The engine crankshaft damper also includes a first cover plate, which is disposed on one side of the damper seat and is fixedly connected to the damper seat.

6. The engine crankshaft vibration damper as described in claim 5, characterized in that, The engine crankshaft damper also includes a second cover plate, which is disposed on the other side of the damper seat and is fixedly connected to the damper seat.

7. The engine crankshaft vibration damper as described in claim 6, characterized in that, The engine includes a block on which a crankshaft and cylinders are mounted, and an engine crankshaft damper is mounted on the crankshaft.

8. A method for selecting engine crankshaft vibration dampers, characterized in that, The engine crankshaft vibration damper as described in claim 7 was selected using the engine crankshaft vibration damper selection method described above. S1. Determine the parameters of the engine crankshaft damper: the number of the spring assemblies is denoted as n, the diameter of the spring is denoted as D1, the thickness of the spring is denoted as d, the pitch circle diameter of all the spring assemblies is denoted as D2, and the outer diameter of the engine crankshaft damper is denoted as D3. S2. Determine the parameters of the engine: the number of cylinders is denoted as m, the diameter of the cylinder is denoted as D4, the stroke of the engine is denoted as S, the maximum burst pressure of the engine is denoted as P, and the diameter of the crankshaft crank pin is denoted as D5. S3. Select the engine crankshaft vibration damper using the following formula: n = (1.6~2.1) * P * D4 * m / D5 / S; d = (0.45~0.5)D1; D1 = (0.4~0.5)D4; D2 = (2~2.2)D4; D3 = D2 + (1.5~1.8)D1; Finally, the engine crankshaft damper that is matched with the engine was selected.

9. The method for selecting an engine crankshaft vibration damper as described in claim 8, characterized in that, In step S3, n = 1.8 * P * D4 * m / D5 / S; d=0.47D1; D1 = 0.45D4; D2 = 2.1D4; D3 = D2 + 1.7D1.

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