Method for selecting engine crankshaft damper and engine crankshaft damper

Abstract

This invention discloses a method for selecting an engine crankshaft vibration damper and an engine crankshaft vibration damper. The damper body is sleeved on the outer circumferential surface of the damper seat. The outer circumferential surface of the damper seat has annularly spaced damper seat grooves. The inner surface of the damper body has annularly spaced damper body grooves that correspond one-to-one with the damper seat grooves. The damper seat grooves and the damper body grooves together form a receiving cavity for accommodating the spring assembly. The number of spring assemblies is denoted as n, the spring diameter as D1, the thickness as d, the spring pitch circle diameter as D2, and the damper outer diameter as D3; the number of cylinders is denoted as m, the cylinder diameter as D4, the engine stroke as S, the engine maximum burst pressure as P, and the crankpin diameter as D5; and the damper is finally selected with relevant formulas to precisely match the engine, thereby improving the engine's operational reliability.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to a method for selecting an engine crankshaft vibration damper and an engine crankshaft vibration damper. Background Technology

[0002] During operation, the crankshaft of a diesel engine is subjected to torques that change periodically in magnitude and direction. When the shaft dampers are not properly matched, it will cause increased engine vibration, accelerated wear of transmission system parts, and even shaft breakage. Moreover, as the strength of diesel engines continues to increase, the impact loads on the shaft system are becoming increasingly greater, making the matching and evaluation of dampers particularly important.

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

[0004] Because there is no clear quantitative correlation between structural parameters and the main parameters of the diesel engine, there is a lack of corresponding reference when adjusting structural parameters, and adjustments can only be made based on repeated trials based on experience. This is both time-consuming and costly, and it is impossible to accurately determine the parameters through quantitative calculations. This can easily lead to insufficient matching between the vibration damper and the diesel engine, thereby affecting the vibration suppression effect of the crankshaft system and reducing the reliability of the shaft system operation. Summary of the Invention

[0005] To overcome the above-mentioned defects, the first technical problem to be solved by the present invention is to provide an engine crankshaft vibration damper that can achieve precise matching between the vibration damper and the engine, thereby improving the reliability of engine operation.

[0006] To solve the above-mentioned technical problems, the present invention provides an engine crankshaft vibration damper, comprising a vibration damper seat, a spring assembly, and a vibration damper body. The vibration damper body is sleeved on the outer peripheral surface of the vibration damper seat. The outer peripheral surface of the vibration damper seat is provided with vibration damper seat grooves at intervals in an annular manner. The inner surface of the vibration damper body is provided with vibration damper body grooves at intervals in an annular manner. The vibration damper seat grooves and the vibration damper body grooves correspond one-to-one. The vibration damper seat grooves and the vibration damper body grooves together form a receiving cavity for accommodating the spring assembly. The spring assembly is disposed in the receiving cavity.

[0007] Furthermore, the spring assembly includes a spring pin and a spring, the spring being a ring structure with an opening, through which the spring pin is inserted into the spring.

[0008] Furthermore, the spring is interference-fitted with both the damper seat and the damper body, while the spring is clearance-fitted with the spring pin.

[0009] Furthermore, the bottom of the groove of the shock absorber seat is provided with a spring pin insertion groove, and the spring pin is inserted into the spring pin insertion groove.

[0010] Furthermore, 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.

[0011] Furthermore, 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.

[0012] Furthermore, the engine includes a housing, on which a crankshaft and cylinders are mounted, and an engine crankshaft damper is mounted on the crankshaft.

[0013] Based on the same inventive concept, the second technical problem to be solved by the present invention is to provide a method for selecting engine crankshaft vibration dampers. The engine crankshaft vibration dampers selected using the method of the present invention can achieve precise matching between the vibration damper and the engine, thereby improving the reliability of engine operation.

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

[0015] 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.

[0016] 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.

[0017] S3. Select the engine crankshaft vibration damper using 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 that is matched with the engine was selected.

[0023] Furthermore, 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 adopting the above technical solution, the beneficial effect of the present invention is that the engine crankshaft vibration damper includes a vibration damper seat, a spring assembly, and a vibration damper body. The vibration damper body is sleeved on the outer peripheral surface of the vibration damper seat. The outer peripheral surface of the vibration damper seat is provided with vibration damper seat grooves at intervals in an annular manner. The inner surface of the vibration damper body is provided with vibration damper body grooves at intervals in an annular manner. The vibration damper seat grooves and the vibration damper body grooves correspond one-to-one. The vibration damper seat grooves and the vibration damper body grooves together form a receiving cavity for accommodating the spring assembly. The spring assembly is disposed in the receiving cavity. The number of spring assemblies is denoted as n, the diameter of the spring is denoted as diameter D1, the thickness of the spring is denoted as d, the pitch circle diameter of all spring assemblies is denoted as D2, and the outer diameter of the engine crankshaft damper is denoted as D3; the number of cylinders is denoted as m, the cylinder diameter is denoted as D4, the engine stroke is denoted as S, the maximum burst pressure of the engine is denoted as P, and the diameter of the crankshaft crankpin is denoted as D5; the engine crankshaft damper is selected using the following formulas: 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, an engine crankshaft damper that is precisely matched to the engine is selected to improve the reliability of engine operation. Attached Figure Description

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

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

[0031] Figure 3 This is a schematic diagram of the engine crankshaft vibration damper of the present invention;

[0032] Figure 4 yes Figure 3 Sectional view along the middle AA direction;

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

[0034] Figure 6 This is a schematic diagram of the engine structure;

[0035] In the diagram: 1. Engine body; 2. Vibration damper seat; 21. Vibration damper seat groove; 22. Spring pin insertion groove; 3. Vibration damper body; 31. Vibration damper body groove; 4. Spring pin; 5. Spring; 6. First cover plate; 7. Second cover plate; 8. Bolt; 9. Cylinder; 10. Crankshaft. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Example 1:

[0038] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown in the figure, this embodiment discloses an engine crankshaft vibration damper, which includes a damper seat 2, a spring assembly, and a damper body 3. The damper body 3 is sleeved on the outer peripheral surface of the damper seat 2. The outer peripheral surface of the damper seat 2 is provided with annularly spaced damper seat grooves 21, and the inner surface of the damper body 3 is provided with annularly spaced damper body grooves 31. The damper seat grooves 21 and the damper body grooves 31 correspond one-to-one. The damper seat grooves 21 and the damper body grooves 31 together form a receiving cavity for accommodating the spring assembly, and the spring assembly is disposed in the receiving cavity.

[0039] Preferably, the spring assembly includes a spring pin 4 and a spring 5. The spring 5 has a circular structure and an opening, through which the spring pin 4 is inserted into the spring 5.

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

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

[0042] Preferably, the engine crankshaft damper further includes a first cover plate 6, which is disposed on one side of the damper seat 2 and is fixedly connected to the damper seat 2.

[0043] Preferably, the engine crankshaft damper further includes a second cover plate 7, which is disposed on the other side of the damper seat 2 and is fixedly connected to the damper seat 2.

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

[0045] Preferably, the engine includes a body 1, on which a crankshaft 10 and a cylinder 9 are disposed, and an engine crankshaft damper is mounted on the crankshaft 10. The specific installation location and installation process of the engine crankshaft damper on the crankshaft 10 are common knowledge to those skilled in the art and will not be described in detail here.

[0046] Example 2:

[0047] This embodiment discloses a method for selecting an engine crankshaft vibration damper. Using this method, an engine crankshaft vibration damper that is precisely matched to the engine in Embodiment 1 is selected.

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

[0049] S2. Determine the engine parameters: the number of cylinders 9 is denoted as m, the diameter of cylinder 9 is denoted as D4, the engine stroke is denoted as S, the maximum burst pressure of the engine is denoted as P, and the diameter of the crankshaft 10 crank pin is denoted as D5.

[0050] S3. Select the engine crankshaft vibration damper using 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, an engine crankshaft damper that matches the engine was selected.

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

[0057] d=0.47D1;

[0058] D1 = 0.45D4;

[0059] D2 = 2.1D4;

[0060] D3 = D2 + 1.7D1.

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

[0062] By establishing clear quantitative constraint formulas for the parameters of the engine and the engine crankshaft damper, the traditional empirical parameter selection is replaced, thus achieving precise matching between the engine crankshaft damper and the engine.

[0063] The constraints on each damper parameter correspond to the specific performance requirements of the shaft system, ensuring that the parameter design directly serves the core objective of shaft system reliability. Through parameter constraints, the required performance of the shaft system is directly guaranteed, effectively improving the operational reliability of the shaft system.

[0064] The technical features with serial numbers mentioned in this manual (such as first cover plate, second cover plate, etc.) are only for distinguishing each technical feature and do not represent the positional relationship, installation sequence, or working sequence of the technical features.

[0065] In the description of this specification, it should be understood that the orientation or positional relationship described by terms such as "outer peripheral surface", "one side", and "the other side" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0066] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the scope of protection of this invention.

Claims

1. A selection method for an engine crankshaft vibration damper, wherein the engine crankshaft vibration damper 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 manner. The inner surface of the damper body is provided with damper body grooves at intervals in an annular manner. 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. The spring assembly includes a spring pin and a spring. The engine includes a block, on which a crankshaft and cylinders are mounted, and an engine crankshaft damper is mounted on the crankshaft. Its features are, The specific selection method for the engine crankshaft vibration damper is as follows: 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; The units for D1, D2, D3, D4, D5, d, and S are all mm, and the unit for P is bar.

2. The method for selecting an engine crankshaft vibration damper as described in claim 1, characterized in that, The spring is a circular ring structure with an opening, through which the spring pin is inserted into the spring.

3. The method for selecting an 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 method for selecting an 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 method for selecting an 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 method for selecting an 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 method for selecting an engine crankshaft vibration damper as described in claim 1, 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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