Variable damping vibration reduction device for diesel engine pipeline

Abstract

The invention discloses a variable damping vibration reduction device for a diesel engine pipeline, comprising a pipe clamp, a pipe clamp seat, a damping cylinder, an inertial impeller assembly, a support seat, a lower platform, a damping cylinder cooling mechanism and an inertial impeller assembly cooling mechanism, the two ends of the upper part of the pipe clamp seat are respectively fixedly connected to the two ends of the pipe clamp, the pipeline is fixed in the pipe clamp, the lower center of the pipe clamp seat is fixedly connected to the upper end of the damping cylinder piston rod, the lower end of the damping cylinder piston rod is fixedly connected to the damping cylinder piston, and the upper and lower chambers of the damping cylinder are respectively filled with lubricating oil. The bottom of the damping cylinder barrel is supported on the lower platform through the support seat. The inertial impeller assembly is fixed on one side of the damping cylinder barrel through a support plate, the upper and lower chambers of the damping cylinder are respectively connected to the inertial impeller assembly, and the damping cylinder cooling mechanism and the inertial impeller assembly cooling mechanism are respectively coated on the outer peripheral surfaces of the damping cylinder barrel and the inertial impeller assembly. The invention effectively absorbs the vibration of the pipeline, reduces the failure mode, and improves the reliability of the diesel engine operation.

Description

Technical Field

[0001] The invention relates to a vibration reduction device, in particular to a vibration reduction device for a diesel engine pipeline, and belongs to the field of vibration technology. Background Art

[0002] Vibration often occurs in production and life. With the development of modern science and technology, high-power and high-speed machines are constantly coming out. Vibration not only affects the service life of machines and instruments, but also seriously affects the health of operators. The working principle and working characteristics of some large equipment such as diesel engines determine that vibration is inevitable during operation. Various external pipelines of diesel engines, such as fuel, gas, lubricating oil, cooling water, etc. are mostly distributed around the diesel engine body. Some longer pipelines are suspended outside the diesel engine body. The vibration of the diesel engine during operation causes the vibration of the external pipeline to intensify, which can easily cause the connecting bolts of the pipeline to loosen and the loose pipe joints to cause oil leakage, water leakage and air leakage. Sometimes the vibration of the diesel engine body can be reduced to a certain extent by improving the processing accuracy of parts, but the degree of improvement of this work is limited and consumes a lot of manpower and material resources. Summary of the invention

[0003] The object of the present invention is to provide a variable damping vibration reduction device for a diesel engine pipeline which has a simple structure and can effectively absorb pipeline vibration.

[0004] The present invention is achieved through the following technical solutions:

[0005] A variable damping vibration reduction device for a diesel engine pipeline comprises a pipe clamp fixed on the pipeline, a pipe clamp seat, a damping cylinder, an inertia impeller assembly, a support seat, a lower platform, a damping cylinder cooling mechanism and an inertia impeller assembly cooling mechanism, wherein the pipe clamp seat is U-shaped, and the two ends of the upper part of the pipe clamp seat are respectively fixedly connected to the two ends of the pipe clamp; the damping cylinder is vertically arranged, the lower center of the pipe clamp seat is fixedly connected to the upper end of the damping cylinder piston rod, the lower end screw of the damping cylinder piston rod passes through the guide sleeve at the center of the upper cylinder cover and the center of the damping cylinder piston in turn, and is fixedly connected to the damping cylinder piston by tightening the nut on the lower side of the piston, and the outer edge of the damping cylinder piston is inserted through the The piston ring divides the inner cavity of the damping cylinder into an upper cavity and a lower cavity of the damping cylinder, and the upper cavity and the lower cavity of the damping cylinder are respectively filled with lubricating oil; the bottom of the damping cylinder barrel is supported on the lower platform through a support seat, and the lower platform is supported on an external foundation; the axial ends of the inertia impeller assembly are respectively fixed on one side of the damping cylinder barrel through support plates, the upper cavity of the damping cylinder is connected to the oil pipe joints corresponding to the inertia impeller assembly through an upper oil pipe joint and an upper oil pipe, and the lower cavity of the damping cylinder is connected to the oil pipe joints corresponding to the inertia impeller assembly through a lower oil pipe joint and a lower oil pipe, respectively, the damping cylinder cooling mechanism is coated on the outer peripheral surface of the damping cylinder barrel, and the inertia impeller assembly cooling mechanism is coated on the outer peripheral surface of the inertia impeller assembly.

[0006] The purpose of the present invention can also be further achieved by the following technical measures:

[0007] Furthermore, the inertial impeller assembly includes an inertial impeller housing, a support shaft and an impeller body, wherein the impeller body has multiple blades evenly distributed radially, the support shaft passing through the center of the impeller body is fixedly connected to the impeller body, the two ends of the support shaft are respectively supported on the centers of the two axial sides of the impeller housing through bearings, and the two axial ends of the impeller housing are respectively supported on the middle of one side adjacent to the damping cylinder through support plates; one end of the upper oil pipe is connected to the upper cavity of the damping cylinder through the upper oil pipe joint, and one end of the lower oil pipe is connected to the lower cavity of the damping cylinder through the lower oil pipe joint; the other end of the upper oil pipe is connected to the upper part of the impeller cavity through the upper oil pipe joint of the impeller housing, and the other end of the lower oil pipe is connected to the lower part of the impeller cavity through the lower oil pipe joint of the impeller housing. The upper oil pipe joint of the impeller housing and the lower oil pipe joint of the impeller housing are respectively located on both sides of the axial center line of the impeller housing.

[0008] Furthermore, the support seat includes an upper flange, a vertical pipe and a lower flange which are fixedly connected as a whole from top to bottom, and the lower platform includes a support, a hinge shaft, a lower column, a lower bearing and a base plate, and the support is in a П-shape; the bottom of the damping cylinder is fixedly connected to the upper flange of the support seat, the lower flange of the support seat is fixedly connected to the upper part of the П-shaped support, the upper part of the lower column is hinged to the lower part of the П-shaped support through a hinge shaft, the studs at both ends of the hinge shaft are respectively locked on both sides of the П-shaped support by nuts, and the lower part of the lower column is supported on the center of the base plate through a lower bearing.

[0009] Furthermore, the damping cylinder cooling mechanism and the inertia impeller assembly cooling mechanism have the same structure, and respectively include a damping cylinder spiral semicircular groove arranged in the axial middle of the damping cylinder and an impeller housing spiral semicircular groove arranged in the axial middle of the outer peripheral surface of the impeller housing, as well as a damping cylinder spiral copper tube and an impeller housing spiral copper tube; the damping cylinder spiral copper tube matches the damping cylinder spiral semicircular groove, and the impeller housing spiral copper tube matches the impeller housing spiral groove; each circle of the damping cylinder spiral copper tube is respectively embedded and fixed in the corresponding damping cylinder spiral semicircular groove, Each circle of the impeller casing spiral copper tube is respectively embedded and fixed in the corresponding impeller casing spiral groove; one end of a damping cylinder water supply hose is connected to the lower end inlet of the damping cylinder spiral copper tube through a hose joint, and one end of the other damping cylinder water supply hose is connected to the upper end outlet of the damping cylinder spiral copper tube through a hose joint; one end of an impeller casing water supply hose is connected to one end inlet of the impeller casing spiral copper tube through a hose joint, and the other impeller casing water supply hose joint is connected to the other end outlet of the impeller casing spiral copper tube through a hose joint.

[0010] Furthermore, the upper and lower parts of the damping cylinder piston rod are respectively fixed with corresponding upper limit rings and lower limit rings, the distance A1 between the lower side surface of the upper limit ring and the lower side surface of the piston is smaller than the distance A between the upper side surface of the upper cylinder cover of the damping cylinder and the upper busbar of the lower oil outlet hole of the damping cylinder barrel, and the distance B1 between the upper side surface of the lower limit ring and the upper side surface of the piston is larger than the distance B between the lower side surface of the upper cylinder cover of the damping cylinder and the lower busbar of the oil outlet hole of the damping cylinder barrel.

[0011] The present invention has a simple structure and is easy to use. The vibration of the pipeline is transmitted to the lubricating oil in the upper chamber of the damping cylinder through the pipe clamp seat and the piston rod, and the vibration energy is absorbed by the motion damping of the viscosity of the lubricating oil; then the lubricating oil is input into the inertial impeller assembly through the movement of the piston, thereby converting the pipeline vibration energy into the rotational kinetic energy of the inertial impeller and the thermal energy of the lubricating oil, thereby improving the ability of the present invention to absorb vibration energy. The lower platform supported on the external foundation has two degrees of freedom of rotation of the X-axis and the Z-axis, which can adapt to the vibration reduction effect of different pipelines. The present invention timely converts the vibration energy of the pipeline into thermal energy through the damping cylinder and the inertial impeller, and reduces the heat of the lubricating oil through the circulating cooling water flowing in the cooling mechanism of the damping cylinder and the cooling mechanism of the inertial impeller assembly, thereby effectively absorbing the vibration of the pipeline, reducing the occurrence of faults, and improving the reliability of the diesel engine. The present invention can also achieve the purpose of variable damping by changing the size of the inertial impeller and the number of its blades.

[0012] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 yes Figure 1 A-direction view. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 and Figure 2As shown, the present invention includes a pipe clamp 1, a pipe clamp seat 2, a damping cylinder 3, an inertia impeller assembly 4, a support seat 5, a lower platform 6, a damping cylinder cooling mechanism 7 and an inertia impeller assembly cooling mechanism 8. The upper and lower pipe clamps 1 are clamped and fixed on a pipeline 10. The pipe clamp seat 2 is U-shaped. The two ends of the upper part of the pipe clamp seat 2 are respectively fixedly connected to the two ends of the pipe clamp 1 by clamping screws 11. The damping cylinder 3 is vertically arranged, and the lower center of the pipe clamp seat 2 is fixedly connected to the upper end of the damping cylinder piston rod 31. The lower end screw 311 of the damping cylinder piston rod 31 passes through the guide sleeve 321 and the damping cylinder piston 33 in the center of the upper cylinder cover 32 in turn, and is fixedly connected to the damping cylinder piston 33 by tightening the nut 34 on the lower side of the damping cylinder piston 33. The outer edge of the damping cylinder piston 33 divides the damping cylinder inner cavity into the damping cylinder upper cavity 351 and the damping cylinder lower cavity 352 through the embedded cast iron piston ring 331. The damping cylinder upper cavity 351 and the damping cylinder lower cavity 352 are filled with lubricating oil from the upper oil filling hole 322 of the upper cylinder cover 32 and the lower oil filling hole 353 at the bottom of the damping cylinder barrel 35, and are blocked with screw plugs 7. The bottom of the damping cylinder barrel 35 is supported on the lower platform 6 through the support seat 5, and the lower platform 6 is supported on the external foundation 20. The upper chamber 351 of the damping cylinder is connected to the corresponding oil pipe joints of the damping cylinder 3 and the inertia impeller assembly 4 through the upper oil pipe joint 361 and the upper oil pipe 362, and the lower chamber 352 of the damping cylinder is connected to the corresponding oil pipe joints of the damping cylinder 3 and the inertia impeller assembly 4 through the lower oil pipe joint 371 and the lower oil pipe 372.

[0017] The inertial impeller assembly 4 includes an inertial impeller housing 41, a support shaft 42 and an impeller body 43. The impeller body 43 is evenly distributed with multiple blades 431 in the radial direction. The support shaft 42 passing through the center of the impeller body 43 is fixedly connected to the impeller body 43. The two ends of the support shaft 42 are respectively supported on the centers of the two axial sides of the impeller housing 41 through bearings 44. The two axial ends of the impeller housing 41 are respectively supported on the middle of the right side adjacent to the damping cylinder 35 through support plates 45. One end of the upper oil pipe 362 is connected to the upper chamber 351 of the damping cylinder through the upper oil pipe joint 361, and one end of the lower oil pipe 372 is connected to the lower chamber 352 of the damping cylinder through the lower oil pipe joint 371. The other end of the upper oil pipe 362 is connected to the upper part of the impeller cavity 412 through the oil pipe joint 411 on the impeller housing 41, and the other end of the lower oil pipe 372 is connected to the lower part of the impeller cavity 412 through the lower oil pipe joint 413 of the impeller housing. The upper oil pipe 362 and the lower oil pipe 372 are respectively located on both sides of the axial center line of the impeller housing 41, so that the lubricating oil flowing into the impeller cavity 411 can generate a clockwise torque on the axis of the impeller body 43. The impeller body 43 can only rotate clockwise. During rotation, the blades 431 push the lubricating oil to flow, thereby converting the vibration energy of the pipeline 10 into the rotational kinetic energy of the impeller body 43 and the thermal energy of the lubricating oil, thereby effectively reducing the vibration of the pipeline 10.

[0018] The support seat 5 includes an upper flange 51, a vertical pipe 52 and a lower flange 53 fixedly connected from top to bottom, and the lower platform 6 includes a support 61, a hinge shaft 62, a lower column 63, a lower bearing 64 and a bottom plate 65, and the support 61 is in a shape of П. The bottom of the damping cylinder 35 is fixedly connected to the upper flange 51 of the support seat 5, the lower flange 53 of the support seat 5 is fixedly connected to the upper part of the П-shaped support 61, the upper part of the lower column 63 is hinged to the lower part of the П-shaped support 61 through the hinge shaft 62, the studs at both ends of the hinge shaft 62 are locked on both sides of the П-shaped support 61 through nuts 66, and the lower part of the lower column 63 is supported on the center of the bottom plate 65 through the lower bearing 64.

[0019] The damping cylinder cooling mechanism 7 is coated on the outer circumference of the damping cylinder 35, and the inertial impeller assembly cooling mechanism 8 is coated on the outer circumference of the inertial impeller assembly 4. The damping cylinder cooling mechanism 7 and the inertial impeller assembly cooling mechanism 8 have the same structure, and respectively include a damping cylinder spiral semicircular groove 353 arranged in the axial middle of the damping cylinder 35 and an impeller housing spiral semicircular groove 413 arranged in the axial middle of the outer circumference of the impeller housing 41, as well as a damping cylinder spiral copper tube 71 and an impeller housing spiral copper tube 81. The damping cylinder spiral copper tube 71 matches the damping cylinder spiral semicircular groove 353, and the impeller housing spiral copper tube 81 matches the impeller housing spiral groove 413. Each circle of the damping cylinder spiral copper tube 71 is respectively embedded and fixed in the corresponding damping cylinder spiral semicircular groove 353, and each circle of the impeller housing spiral copper tube 81 is respectively embedded and fixed in the corresponding impeller housing spiral groove 411. One end of a damping cylinder water delivery hose 72 is connected to the lower end inlet of the damping cylinder spiral copper tube 71 through a hose connector 73, and one end of another damping cylinder water delivery hose 72 is connected to the upper end outlet of the damping cylinder spiral copper tube 71 through a hose connector 73. One end of an impeller housing water delivery hose 82 is connected to one end inlet of the impeller housing spiral copper tube 81 through a hose connector 73, and another impeller housing water delivery hose 72 is connected to the other end outlet of the impeller housing spiral copper tube 81 through a hose connector 73. Circulating cooling water flows from the hose and the hose connector through the corresponding spiral copper tubes, thereby taking away the heat of the lubricating oil in the damping cylinder and the inertial impeller assembly, respectively, and improving the ability of the present invention to absorb vibration energy.

[0020] The upper and lower parts of the piston rod 31 of the damping cylinder are respectively fixed with corresponding upper limit rings 311 and lower limit rings 312. The distance A1 between the lower side of the upper limit ring 311 and the lower side of the piston 33 is less than the distance A between the upper side of the upper cylinder cover 32 of the damping cylinder 3 and the upper generatrix of the lower oil outlet hole 354 of the damping cylinder barrel. The distance B1 between the upper side of the lower limit ring 312 and the upper side of the piston is greater than the distance B between the lower side of the upper cylinder cover 32 of the damping cylinder 3 and the lower generatrix of the upper oil outlet hole 355 of the damping cylinder barrel. The upper limit ring 311 and the lower limit ring 312 can limit the up and down strokes of the piston 33 to prevent the piston 33 from sealing the upper oil outlet hole 355 or the lower oil outlet hole 354 of the damping cylinder barrel when working, resulting in vibration reduction failure. At the same time, it is also convenient for oil leakage. When leaking oil, the piston 35 moves to the upper limit position, and its upper side surface is flush with the lower busbar of the oil outlet hole 355 on the damping cylinder, and the lubricating oil in the upper chamber 351 of the damping cylinder can flow out through the upper oil pipe joint 361 to leak oil; when the piston 35 moves to the lower limit position, its lower side surface is flush with the upper busbar of the lower oil outlet hole 354 of the damping cylinder, and the lubricating oil in the lower chamber 352 of the damping cylinder can flow out through the lower oil pipe joint 371 to leak oil, which is very convenient to use.

[0021] When the present invention is working, the vibration of the pipeline is transmitted to the damping cylinder through the pipe clamp, the pipe clamp seat and the piston rod, driving the piston to move up and down. When the damping cylinder piston moves downward, it squeezes the lubricating oil in the lower chamber of the damping cylinder. The lubricating oil in the upper and lower chambers of the damping cylinder generates a pressure difference. The lubricating oil enters the inertia impeller assembly through the lower oil pipe to drive the impeller body to rotate. The rotation of the impeller body and the movement of the viscous lubricating oil generate damping, thereby absorbing the vibration energy of the pipeline and achieving a vibration reduction effect. The same is true when the damping cylinder piston moves upward. Since the upper oil pipe and the lower oil pipe are respectively located on both sides of the axis of the inertia impeller assembly, the impeller body always keeps rotating in the clockwise direction regardless of whether the damping cylinder piston moves up or down, thereby ensuring the stability of absorbing vibration energy.

[0022] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A variable damping vibration reduction device for a diesel engine pipeline, comprising a pipe clamp, a pipe clamp seat, a damping cylinder, an inertia impeller assembly, a support seat, a lower platform, a damping cylinder cooling mechanism and an inertia impeller assembly cooling mechanism, wherein the pipe clamp is clamped and fixed on the pipeline, the pipe clamp seat is U-shaped, and the two ends of the upper part of the pipe clamp seat are respectively fixedly connected to the two ends of the pipe clamp; the damping cylinder is vertically arranged, the lower center of the pipe clamp seat is fixedly connected to the upper end of the damping cylinder piston rod, the lower end screw of the damping cylinder piston rod passes through the guide sleeve and the piston center of the upper cylinder cover in turn, and is fixedly connected to the damping cylinder piston by tightening the nut on the lower side of the damping cylinder piston; the outer edge of the damping cylinder piston is inserted through The piston ring is installed to divide the inner cavity of the damping cylinder into an upper cavity and a lower cavity of the damping cylinder, and the upper cavity and the lower cavity of the damping cylinder are respectively filled with lubricating oil; the bottom of the damping cylinder barrel is supported on the lower platform through a support seat, and the lower platform is supported on an external foundation; the axial ends of the inertia impeller assembly are respectively fixed on one side of the damping cylinder barrel through support plates, the upper cavity of the damping cylinder is connected to the oil pipe joints corresponding to the inertia impeller assembly through an upper oil pipe joint and an upper oil pipe, and the lower cavity of the damping cylinder is connected to the oil pipe joints corresponding to the inertia impeller assembly through a lower oil pipe joint and a lower oil pipe, respectively, the damping cylinder cooling mechanism is coated on the outer peripheral surface of the damping cylinder barrel, and the inertia impeller assembly cooling mechanism is coated on the outer peripheral surface of the inertia impeller assembly; The inertia impeller assembly comprises an inertia impeller casing, a support shaft and an impeller body, wherein the impeller body has a plurality of blades evenly distributed radially, the support shaft passing through the center of the impeller body is fixedly connected to the impeller body, the two ends of the support shaft are respectively supported on the centers of the two axial sides of the impeller casing through bearings, and the two axial ends of the impeller casing are respectively supported on the middle of one side adjacent to the damping cylinder through support plates; one end of the upper oil pipe is connected to the upper cavity of the damping cylinder through the upper oil pipe joint, and one end of the lower oil pipe is connected to the lower cavity of the damping cylinder through the lower oil pipe joint; the other end of the upper oil pipe is connected to the upper part of the impeller cavity through the upper oil pipe joint of the impeller casing, and the other end of the lower oil pipe is connected to the lower part of the impeller cavity through the lower oil pipe joint of the impeller casing; the upper oil pipe joint of the impeller casing and the lower oil pipe joint of the impeller casing are respectively located on both sides of the axial center line of the impeller casing; Features: The support seat comprises an upper flange, a vertical pipe and a lower flange which are fixedly connected from top to bottom into one body, the lower platform comprises a support, a hinge shaft, a lower column, a lower bearing and a bottom plate, and the support is in a shape of P; the bottom of the damping cylinder is fixedly connected to the upper flange of the support seat, the lower flange of the support seat is fixedly connected to the upper part of the P-shaped support, the upper part of the lower column is hinged to the lower part of the P-shaped support through a hinge shaft, the studs at both ends of the hinge shaft are respectively locked on both sides of the P-shaped support through nuts, and the lower part of the lower column is supported on the center of the bottom plate through the lower bearing; The damping cylinder cooling mechanism and the inertia impeller assembly cooling mechanism have the same structure, and respectively include a damping cylinder spiral semicircular groove arranged in the axial middle of the damping cylinder and an impeller housing spiral semicircular groove arranged in the axial middle of the outer peripheral surface of the impeller housing, a damping cylinder spiral copper tube and an impeller housing spiral copper tube; the damping cylinder spiral copper tube matches the damping cylinder spiral semicircular groove, and the impeller housing spiral copper tube matches the impeller housing spiral groove; each circle of the damping cylinder spiral copper tube is respectively embedded and fixed in the corresponding damping cylinder spiral semicircular groove, and each circle The spiral copper tubes of the impeller casing are respectively embedded and fixed in the corresponding spiral grooves of the impeller casing; one end of a damping cylinder water supply hose is connected to the lower end inlet of the damping cylinder spiral copper tube through a hose joint, and one end of the other damping cylinder water supply hose is connected to the upper end outlet of the damping cylinder spiral copper tube through a hose joint; one end of an impeller casing water supply hose is connected to one end inlet of the impeller casing spiral copper tube through a hose joint, and the other impeller casing water supply hose is connected to the other end outlet of the impeller casing spiral copper tube through a hose joint.

2. The variable damping vibration reduction device for a diesel engine pipeline according to claim 1, characterized in that: The upper and lower parts of the piston rod of the damping cylinder are respectively fixed with corresponding upper limit rings and lower limit rings. The distance A1 between the lower side surface of the upper limit ring and the lower side surface of the piston is smaller than the distance A between the upper side surface of the upper cylinder cover of the damping cylinder and the upper busbar of the lower oil outlet hole of the damping cylinder barrel. The distance B1 between the upper side surface of the lower limit ring and the upper side surface of the piston is smaller than the distance B between the lower side surface of the upper cylinder cover of the damping cylinder and the lower busbar of the oil outlet hole of the damping cylinder barrel.

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