CN113217578A - Shafting frequency modulation device and engine - Google Patents

Shafting frequency modulation device and engine Download PDF

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Publication number
CN113217578A
CN113217578A CN202110622975.8A CN202110622975A CN113217578A CN 113217578 A CN113217578 A CN 113217578A CN 202110622975 A CN202110622975 A CN 202110622975A CN 113217578 A CN113217578 A CN 113217578A
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inertia ring
temperature
shafting
frequency modulation
variable inertia
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CN202110622975.8A
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CN113217578B (en
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时胜文
韩峰
田新伟
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/22—Compensation of inertia forces
    • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
    • F16F15/167—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material having an inertia member, e.g. ring
    • F16F15/173—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material having an inertia member, e.g. ring provided within a closed housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/02—Special physical effects, e.g. nature of damping effects temperature-related
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0011—Balancing, e.g. counterbalancing to produce static balance

Abstract

The invention relates to the technical field of engines and discloses a shafting frequency modulation device and an engine. The shafting frequency modulation device comprises a shock absorber shell, a primary inertia ring, a secondary variable inertia ring and a temperature-sensitive lock catch structure, wherein a fixed shaft is arranged at the center of the shock absorber shell, and silicone oil is filled in the shock absorber shell; the primary inertia ring is fixedly sleeved on the fixed shaft; the second-stage variable inertia ring is arranged between the shock absorber shell and the first-stage inertia ring; the temperature-sensitive latch structure is configured to lock the secondary variable inertia ring with the damper housing when the temperature of the silicone oil is less than a set temperature, and to lock the secondary variable inertia ring with the primary inertia ring when the temperature of the silicone oil is greater than or equal to the set temperature. The invention can change the frequency of the shafting, thereby controlling the torsional vibration at the free end and the flywheel end of the engine, realizing the optimal matching of the engine on different units, ensuring the reliability of the shafting, and carrying out self-adaptive adjustment by taking the self-adjusting quantity of the shafting as the control input quantity without external triggering, and the frequency modulation is efficient and has wider frequency modulation range.

Description

Shafting frequency modulation device and engine
Technical Field
The invention relates to the technical field of engines, in particular to a shafting frequency modulation device and an engine.
Background
The large-cylinder-diameter power generation diesel engine has wide application and huge market prospect, but the development of the same engine often matches more than ten groups of units due to numerous market segments and wide matching market, and the working rotating speed is also greatly different. However, the diesel engine is often developed with only one basic model, and shafting redesign is difficult to be performed according to the state of each unit, so that a severe test is provided for shafting reliability. Under different unit states, shafting torsional vibration has very big difference, and the diesel engine that generates electricity simultaneously must strictly restrict flywheel output torsional vibration and guarantee generating set shafting reliability.
Therefore, a shafting frequency modulation device capable of adaptively adjusting the shafting frequency is needed.
Disclosure of Invention
The invention aims to provide a shafting frequency modulation device and an engine, which can adaptively adjust the shafting frequency to control the torsional vibration of the free end and the flywheel end of the engine, realize the optimal matching of the engine on different units and ensure the reliability of the shafting.
In order to achieve the purpose, the invention adopts the following technical scheme:
an shafting frequency modulation device, comprising:
the damper shell is arranged on the crankshaft, a fixed shaft is arranged in the center of the damper shell, and silicone oil is filled in the damper shell;
the primary inertia ring is fixedly sleeved on the fixed shaft;
the second-stage variable inertia ring is arranged between the shock absorber shell and the first-stage inertia ring;
a temperature-sensitive locking structure configured to lock the secondary variable inertia ring with the damper housing when a temperature of the silicone oil is less than a set temperature, and to lock the secondary variable inertia ring with the primary inertia ring when the temperature of the silicone oil is equal to or greater than the set temperature.
As the preferred technical scheme of shafting frequency modulation device, the temperature sensing hasp structure includes:
a first temperature-sensitive snap-lock structure disposed between the damper housing and the secondary variable inertia ring, the first temperature-sensitive snap-lock structure configured to couple the secondary variable inertia ring with the damper housing when the temperature of the silicone oil is less than a set temperature and to decouple the secondary variable inertia ring from the damper housing when the temperature of the silicone oil is greater than or equal to the set temperature;
a second temperature-sensitive latch structure disposed between the primary inertia ring and the secondary variable inertia ring, the second temperature-sensitive latch structure configured to couple the secondary variable inertia ring and the primary inertia ring when the temperature of the silicon oil is greater than or equal to a set temperature, and to decouple the secondary variable inertia ring from the primary inertia ring when the temperature of the silicon oil is less than the set temperature.
As the preferred technical scheme of shafting frequency modulation device, first temperature sensing hasp structure with second temperature sensing hasp structure all includes:
the two side plates are distributed at intervals along the circumferential direction between the shock absorber shell and the second-stage variable inertia ring and between the first-stage inertia ring and the second-stage variable inertia ring, the retainer is arranged between the two side plates and can move between the two side plates, and an annular withdrawing groove is formed in the retainer;
the temperature sensing medium is arranged on one side of the retainer, and the melting point of the temperature sensing medium is the set temperature;
the elastic piece is arranged on the other side of the retainer;
the elastic locking ring is sleeved on the periphery of the retainer, the shock absorber shell, one side of the second-stage variable inertia ring facing the first-stage inertia ring and the first-stage inertia ring are all provided with locking grooves, and the elastic locking ring can be clamped into the locking grooves to achieve locking or be disengaged from the locking grooves and enter the annular withdrawing grooves to achieve unlocking.
As the preferred technical scheme of the shafting frequency modulation device, the retainer is arc-shaped.
As the preferred technical scheme of the shafting frequency modulation device, the temperature sensing medium is made of PE.
As a preferred technical scheme of the shafting frequency modulation device, the elastic part is a spring, one side of the retainer facing the elastic part is provided with a positioning section, one end of the elastic part is sleeved on the positioning section, and the other end of the elastic part is abutted against the side plate.
As the preferred technical scheme of the shafting frequency modulation device, the side surface of the withdrawing groove close to the locking groove is an inclined surface.
As the preferred technical scheme of the shafting frequency modulation device, the second-stage variable inertia ring is arc-shaped.
As the preferred technical scheme of the shafting frequency modulation device, the number of the secondary variable inertia rings is multiple, and the secondary variable inertia rings are distributed at intervals along the circumferential direction.
An engine comprising a shafting frequency modulation device as defined in any one of the preceding claims.
The invention has the beneficial effects that:
the invention provides a shafting frequency modulation device, which comprises a shock absorber shell, a primary inertia ring, a secondary variable inertia ring and a temperature-sensitive lock catch structure, wherein the shock absorber shell is arranged on a crankshaft, a fixed shaft is arranged at the center of the shock absorber shell, and silicone oil is filled in the shock absorber shell; the primary inertia ring is fixedly sleeved on the fixed shaft; the second-stage variable inertia ring is arranged between the shock absorber shell and the first-stage inertia ring; the temperature-sensitive latch structure is configured to lock the secondary variable inertia ring with the damper housing when the temperature of the silicone oil is less than a set temperature, and to lock the secondary variable inertia ring with the primary inertia ring when the temperature of the silicone oil is greater than or equal to the set temperature. Can change shafting frequency to control engine free end, flywheel end torsional vibration, realize the optimal matching of engine on different units, guarantee shafting reliability, and need not external triggering, carry out the self-adaptation regulation as control input with shafting self regulating variable, the frequency modulation is high-efficient, succinct, reliable, and the frequency modulation scope is wider, and the damping effect is more excellent.
Drawings
Fig. 1 is a schematic structural diagram of a shafting frequency modulation device according to an embodiment of the present invention;
fig. 2 is a partial enlarged view of a shafting frequency modulation device according to an embodiment of the present invention;
FIG. 3 is a physical model of a shafting frequency modulation device according to an embodiment of the present invention;
FIG. 4 is a schematic representation of the change in silicone oil temperature with engine speed for a certain type of engine damper according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of torsional vibration of a frequency-modulated front free end of a shafting according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of free end torsional vibration after frequency modulation of a shafting according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of frequency modulated front flywheel end torsional vibrations of a shafting according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a flywheel end torsional vibration after frequency modulation of a shafting according to an embodiment of the present invention.
In the figure:
1. a damper housing; 11. a fixed shaft; 2. a primary inertia ring; 3. a secondary variable inertia ring; 41. a first temperature-sensitive locking structure; 42. a second temperature-sensitive locking structure; 43. a holder; 431. withdrawing from the groove; 44. a temperature sensitive medium; 45. an elastic member; 46. an elastic locking ring; 47. and locking the grooves.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 and 2, the invention provides a shafting frequency modulation device, which comprises a shock absorber shell 1, a primary inertia ring 2, a secondary variable inertia ring 3 and a temperature-sensitive locking structure, wherein the shock absorber shell 1 is mounted on a crankshaft, a fixed shaft 11 is arranged at the center of the shock absorber shell 1, and silicone oil is filled in the shock absorber shell 1; the primary inertia ring 2 is fixedly sleeved on the fixed shaft 11; the secondary variable inertia ring 3 is arranged between the shock absorber shell 1 and the primary inertia ring 2; the temperature-sensitive snap structure is configured to lock the secondary variable inertia ring 3 with the damper housing 1 when the temperature of the silicone oil is less than the set temperature, and to lock the secondary variable inertia ring 3 with the primary inertia ring 2 when the temperature of the silicone oil is equal to or greater than the set temperature.
The frequency modulation principle of the shafting frequency modulation device provided by the invention is as follows:
firstly, when performing torsional vibration damping analysis on an engine shafting, simplifying the engine shafting into a two-degree-of-freedom torsional pendulum according to the principle that kinetic energy is equal and frequency is equal after simplification, and listing a vibration equation of a two-degree-of-freedom torsional pendulum model according to the darlingbell principle as shown in fig. 3:
Figure BDA0003100727910000051
Figure BDA0003100727910000061
in the formula: j. the design is a squareg-engine shafting inertia; omegan-a shafting natural frequency; k is a radical ofg-the torsional stiffness of the shaft section of the shafting simplified rear torsion pendulum; me-an equivalent disturbance moment; j. the design is a squaredThe primary inertia ring 2 inertia of the shock absorber; k is a radical ofd-damper torsional stiffness; cd-damper torsional damping;
the following formula (1) and (2) can be solved:
Figure BDA0003100727910000062
wherein:
Figure BDA0003100727910000063
Agthe crankshaft system simplifies the torsional oscillation amplitude of the rear simple mass torsional pendulum; alpha-fixed adjustment ratio, the ratio of the natural frequency of the shock absorber to the natural frequency of the shafting; the ratio of the beta-excitation torque frequency to the self-oscillation circle frequency of the crankshaft; gamma-damping ratio.
The torsional vibration amplitude A can be seen from the formula (3)gIs a function of a fixed modulation ratio alpha, a ratio beta of the exciting moment frequency to the self-oscillation circular frequency of the crankshaft, a damping ratio gamma and the like, wherein the most important is the fixed modulation ratio alpha, namely the ratio of the natural frequency of the shock absorber to the natural frequency of a shafting, and under the condition of certain damping and rigidity, the primary inertia ring 2 inertia J of the shock absorber is mainly useddAnd the inertia J of the shaft systemgThe ratio of the two inertias is determined, so that the torsional vibration of the shafting can be controlled by adjusting the ratio of the two inertias, and the shafting frequency modulation device provided by the invention performs shafting frequency modulation control based on the characteristics of the shafting.
In addition, the silicone oil damper shears silicone oil through a relative torsion angle between the damper shell 1 and the primary inertia ring 2 of the damper, the torsion vibration energy is consumed to realize the shafting damping function, and the silicone oil energy consumption is converted into heat energy. When the torsional vibration of the shafting is close to the resonance rotating speed and the torsional amplitude value is increased, the shearing action on the silicon oil is increased, and the temperature of the silicon oil is increased along with the shearing action, so that the temperature of the silicon oil is one of objective reflection of the torsional vibration of the shafting. As shown in FIG. 4, when a certain type of engine works, the temperature of the silicone oil damper changes with the rotating speed of the engine, when the rotating speed of the engine reaches 1700r/min, first-order torsional vibration resonance occurs on a crankshaft, the temperature of the silicone oil of the damper rises rapidly, the viscosity, the rigidity and the damping of the silicone oil are reduced along with the temperature, and the damping effect is reduced. The shafting frequency modulation device provided by the invention realizes shafting frequency modulation through the sensitivity of silicon oil temperature to torsional resonance by the characteristics, avoids shafting resonance rotating speed and ensures shafting reliability.
In summary, the shafting frequency modulation device provided by the invention uses the silicone oil damper as a main body structure, the secondary variable inertia ring 3 and the temperature-sensitive latch structure are additionally arranged, and based on the characteristics of the silicone oil, the temperature-sensitive latch structure can control whether the secondary variable inertia ring 3 belongs to the damper shell 1 or the primary inertia ring 2 through the temperature of the silicone oil, namely, the inertia J of the primary inertia ring 2 of the damper in the physical model is realizeddAnd the inertia J of the shaft systemgThe distribution of (2) and then change shafting frequency, can control engine free end, flywheel end torsional vibration, realize the optimal matching of engine on different units, guarantee shafting reliability, and need not external triggering, carry out the self-adaptation regulation as control input with shafting self regulating variable, the frequency modulation is high-efficient, succinct, reliable, and frequency modulation scope is wider, and the damping effect is more excellent.
As shown in FIGS. 5 to 8, the frequency modulation effect of a diesel engine shafting for a certain 1500r/min power generation cylinder is verified. Referring to fig. 5 and 7, in an original state, the shafting resonance frequency is 110Hz, the shafting 4.5 order resonance occurs at 1500r/min, the torsional amplitude values of the free end and the flywheel end are large, and the temperature of the silicone oil rises rapidly; referring to fig. 6 and 8, after the shafting frequency modulation device is started, the shafting frequency is increased to 132Hz, the 1500r/min single-order torsional vibration is reduced by 59% and 70% respectively, and shafting resonance in the working rotating speed section is effectively avoided.
Specifically, in the present embodiment, referring to fig. 1, the temperature-sensitive locking structure includes a first temperature-sensitive locking structure 41 and a second temperature-sensitive locking structure 42, the first temperature-sensitive locking structure 41 is disposed between the damper housing 1 and the secondary variable inertia ring 3, the first temperature-sensitive locking structure 41 is configured to combine the secondary variable inertia ring 3 with the damper housing 1 when the temperature of the silicone oil is less than the set temperature, and to separate the secondary variable inertia ring 3 from the damper housing 1 when the temperature of the silicone oil is equal to or greater than the set temperature; the second temperature-sensitive locking structure 42 is disposed between the primary inertia ring 2 and the secondary variable inertia ring 3, and the second temperature-sensitive locking structure 42 is configured to combine the secondary variable inertia ring 3 with the primary inertia ring 2 when the temperature of the silicon oil is greater than or equal to a set temperature, and to separate the secondary variable inertia ring 3 from the primary inertia ring 2 when the temperature of the silicon oil is less than the set temperature. So that the secondary variable inertia ring 3 is selectively coupled to the damper housing 1 or the primary inertia ring 2.
More specifically, referring to fig. 2, the first temperature-sensitive locking structure 41 and the second temperature-sensitive locking structure 42 each include a holder 43, a temperature-sensitive medium 44, an elastic member 45, and an elastic locking ring 46. Two side plates which are distributed at intervals along the circumferential direction are arranged between the shock absorber shell 1 and the second-stage variable inertia ring 3 and between the first-stage inertia ring 2 and the second-stage variable inertia ring 3, the retainer 43 is arranged between the two side plates and can move between the two side plates, and the retainer 43 is provided with an annular withdrawing groove 431. The temperature-sensitive medium 44 is provided on one side of the holder 43, the melting point of the temperature-sensitive medium 44 is the set temperature, and the elastic member 45 is provided on the other side of the holder 43. The elastic locking ring 46 is sleeved on the periphery of the retainer 43, the damper housing 1, one side of the second-level variable inertia ring 3 facing the first-level inertia ring 2 and the first-level inertia ring 2 are respectively provided with a locking groove 47, the elastic locking ring 46 of the first temperature-sensitive locking structure 41 can be simultaneously clamped into the locking grooves 47 of the damper housing 1 and one side of the second-level variable inertia ring 3 facing the damper housing 1 so as to combine the damper housing 1 with the second-level variable inertia ring 3, and the elastic locking ring can be separated from the locking grooves 47 of the damper housing 1 and one side of the second-level variable inertia ring 3 facing the damper housing 1 and enter the exit groove 431 of the retainer 43 of the first temperature-sensitive locking structure 41 so as to separate the damper housing 1 from the second-level variable inertia ring 3. The elastic locking ring 46 of the second temperature-sensitive locking structure 42 can be simultaneously locked into the locking grooves 47 of the sides of the first-stage inertia ring 2 and the second-stage variable inertia ring 3 facing the first-stage inertia ring 2 to combine the first-stage inertia ring 2 with the second-stage variable inertia ring 3, and can be disengaged from the locking grooves 47 of the sides of the first-stage inertia ring 2 and the second-stage variable inertia ring 3 facing the first-stage inertia ring 2 and enter the disengaging grooves 431 of the retainer 43 of the second temperature-sensitive locking structure 42 to disengage the first-stage inertia ring 2 from the second-stage variable inertia ring 3.
When the temperature of the silicone oil does not reach the set temperature, the temperature-sensitive medium 44 is in a solid state, at this time, the elastic locking ring 46 of the first temperature-sensitive locking structure 41 is positioned in the locking groove 47 of the side, facing the shock absorber shell 1, of the second-stage variable inertia ring 3, and the shock absorber shell 1 and the second-stage variable inertia ring 3 are in a combined state; at this time, the elastic locking ring 46 of the second temperature-sensitive locking structure 42 is located in the exit groove 431 of the retainer 43, and the first-stage inertia ring 2 and the second-stage variable inertia ring 3 are in a separated state. When the temperature of the silicone oil reaches a set temperature, the temperature-sensitive medium 44 is converted from a solid state to a liquid state, the resistance is reduced, at this time, the retainer 43 in the first temperature-sensitive locking structure 41 rotates anticlockwise under the action of the elastic piece 45, when the retainer 43 rotates to the position that the withdrawing groove 431 is opposite to the locking groove 47, the elastic locking ring 46 is withdrawn from the locking groove 47 and slides into the withdrawing groove 431, and the damper shell is separated from the secondary variable inertia ring 3; at this time, the retainer 43 in the second temperature-sensitive locking structure 42 rotates clockwise under the action of the elastic piece 45, when the retainer 43 rotates, the elastic locking ring 46 slides out along the groove wall of the withdrawing groove 431 under the pushing of the groove wall of the locking groove 47 and is clamped into the locking groove 47, and the primary inertia ring 2 is combined with the secondary variable inertia ring 3.
Preferably, the cage 43 is arcuate and the secondary variable inertia ring 3 is arcuate. With the above arrangement, the movement of the holder 43 is made smoother. Preferably, the material of the temperature-sensitive medium 44 is PE (polyethylene), and the chemical stability is good. Preferably, the elastic member 45 is a spring, one side of the retainer 43 facing the elastic member 45 is provided with a positioning section, one end of the elastic member 45 is sleeved on the positioning section, and the other end of the elastic member 45 is abutted against the side plate, so that the elastic member 45 is more convenient and stable to mount. Preferably, the side of the escape groove 431 adjacent to the locking groove 47 is sloped to allow the elastic locking ring 46 to more easily slide in and out of the escape groove 431. Preferably, the number of the two-stage variable inertia rings 3 is multiple, and the multiple two-stage variable inertia rings 3 are distributed at intervals along the circumferential direction, in this embodiment, the number of the two-stage variable inertia rings 3 is two, and certainly, may be more than two, and is not limited to this embodiment.
The invention also provides an engine which comprises the shafting frequency modulation device. By adopting the shafting frequency modulation device, the shafting frequency can be changed, and shafting resonance in a working rotating speed section is avoided.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An shafting frequency modulation device, comprising:
the damper comprises a damper shell (1) which is arranged on a crankshaft, wherein a fixed shaft (11) is arranged at the center of the damper shell (1), and silicone oil is filled in the damper shell (1);
the primary inertia ring (2) is fixedly sleeved on the fixed shaft (11);
a secondary variable inertia ring (3) disposed between the damper housing (1) and the primary inertia ring (2);
a temperature-sensitive snap structure configured to lock the secondary variable inertia ring (3) with the damper housing (1) when the temperature of the silicone oil is less than a set temperature, and to lock the secondary variable inertia ring (3) with the damper housing (1) when the temperature of the silicone oil is equal to or greater than the set temperature.
2. The shafting frequency modulation device according to claim 1, wherein the temperature-sensitive locking structure comprises:
a first temperature-sensitive snap structure (41) disposed between the damper housing (1) and the secondary variable inertia ring (3), the first temperature-sensitive snap structure (41) being configured to couple the secondary variable inertia ring (3) with the damper housing (1) when the temperature of the silicone oil is less than a set temperature, and to decouple the secondary variable inertia ring (3) from the damper housing (1) when the temperature of the silicone oil is greater than or equal to the set temperature;
a second temperature-sensitive snap structure (42) disposed between the primary inertia ring (2) and the secondary variable inertia ring (3), the second temperature-sensitive snap structure (42) being configured to couple the secondary variable inertia ring (3) with the primary inertia ring (2) when the temperature of the silicone oil is greater than or equal to a set temperature, and to decouple the secondary variable inertia ring (3) from the primary inertia ring (2) when the temperature of the silicone oil is less than the set temperature.
3. Shafting frequency modulation device according to claim 2, wherein said first temperature sensitive locking structure (41) and said second temperature sensitive locking structure (42) each comprise:
two side plates which are distributed at intervals along the circumferential direction are arranged between the shock absorber shell (1) and the second-stage variable inertia ring (3) and between the first-stage inertia ring (2) and the second-stage variable inertia ring (3), the retainer (43) is arranged between the two side plates and can move between the two side plates, and an annular withdrawing groove (431) is formed in the retainer (43);
a temperature-sensitive medium (44) provided on one side of the holder (43), the melting point of the temperature-sensitive medium (44) being the set temperature;
an elastic member (45) provided on the other side of the holder (43);
the elastic locking ring (46) is sleeved on the periphery of the retainer (43), the shock absorber shell (1), the second-stage variable inertia ring (3) face one side of the first-stage inertia ring (2) and the first-stage inertia ring (2) are provided with locking grooves (47), and the elastic locking ring (46) can be clamped into the locking grooves (47) to achieve locking or be disengaged from the locking grooves (47) and enter the annular disengaging grooves (431) to achieve unlocking.
4. Shafting frequency modulation device according to claim 3, characterized in that the holder (43) is curved.
5. Shafting frequency modulation device according to claim 3, wherein the material of said temperature sensitive medium (44) is PE.
6. A shafting frequency modulation device according to claim 3, wherein the elastic member (45) is a spring, one side of the retainer (43) facing the elastic member (45) is provided with a positioning section, one end of the elastic member (45) is sleeved on the positioning section, and the other end of the elastic member (45) is abutted against the side plate.
7. Shafting frequency modulation device according to claim 3, wherein the side of the exit groove (431) close to the locking groove (47) is beveled.
8. Shafting frequency modulation device according to any of claims 1 to 7, wherein said secondary variable inertia ring (3) is curved.
9. A shafting frequency modulation apparatus according to any one of claims 1 to 7, wherein said secondary variable inertia ring (3) is plural in number, and said plural secondary variable inertia rings (3) are spaced apart in a circumferential direction.
10. An engine comprising a shafting frequency modulation apparatus as claimed in any one of claims 1 to 9.
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Citations (9)

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JP2005172029A (en) * 2003-12-08 2005-06-30 Honda Motor Co Ltd Damper
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CN109372944A (en) * 2018-12-13 2019-02-22 潍柴动力股份有限公司 A kind of silicon oil damper and engine
CN109990044A (en) * 2017-12-07 2019-07-09 爱信精机株式会社 Damping device
CN110678669A (en) * 2017-05-23 2020-01-10 株式会社富国 Torsional vibration damper
CN211599400U (en) * 2019-12-31 2020-09-29 潍柴动力股份有限公司 Inertia ring of shock absorber, silicone oil torsional vibration shock absorber and engine
CN112673188A (en) * 2018-09-10 2021-04-16 利滕斯汽车合伙公司 Combined isolation and torsional vibration damping device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005172029A (en) * 2003-12-08 2005-06-30 Honda Motor Co Ltd Damper
CN204692452U (en) * 2015-04-18 2015-10-07 潍柴动力股份有限公司 A kind of vibration damper
KR20170065230A (en) * 2015-12-03 2017-06-13 현대자동차주식회사 Temperature Response type Torsional Damper and Crankshaft thereby
CN108603564A (en) * 2016-01-22 2018-09-28 Zf腓特烈斯哈芬股份公司 Rotation damping assembly for vehicle transmission system
CN110678669A (en) * 2017-05-23 2020-01-10 株式会社富国 Torsional vibration damper
CN109990044A (en) * 2017-12-07 2019-07-09 爱信精机株式会社 Damping device
CN112673188A (en) * 2018-09-10 2021-04-16 利滕斯汽车合伙公司 Combined isolation and torsional vibration damping device
CN109372944A (en) * 2018-12-13 2019-02-22 潍柴动力股份有限公司 A kind of silicon oil damper and engine
CN211599400U (en) * 2019-12-31 2020-09-29 潍柴动力股份有限公司 Inertia ring of shock absorber, silicone oil torsional vibration shock absorber and engine

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