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CN-121761057-B - Long-stroke air spring damping device with floating oil seal

CN121761057BCN 121761057 BCN121761057 BCN 121761057BCN-121761057-B

Abstract

The invention discloses a long-stroke air spring damping device with a floating oil seal, which relates to the technical field of heavy equipment damping, and comprises a basic bearing unit, an adaptive floating oil seal unit, a long-stroke air spring unit, an adjustable damping unit, an adaptive floating oil seal unit, an adjustable damping unit and a base bearing unit, wherein the basic bearing unit forms a static framework and an installation reference of the device, the adaptive floating oil seal unit is installed in the basic bearing unit, the long-stroke air spring unit is coaxially arranged in the axial direction of the adaptive floating oil seal unit and is in sealed coupling with the adaptive floating oil seal unit, the adjustable damping unit is embedded in the long-stroke air spring unit and is in linkage with the long-stroke air spring unit, the adaptive floating oil seal unit is configured to be adaptively adjusted along with radial deflection of the long-stroke air spring unit so as to maintain dynamic sealing, and three major pain points of sealing failure, performance cracking and maintenance difficulty of a traditional device under extreme working conditions are fundamentally solved through system integration and cooperation of the basic bearing unit, the adaptive floating oil seal unit and the adjustable damping unit.

Inventors

  • JIN YANMEI
  • CHEN LIPING
  • ZHENG HUIMIN
  • Ao Xingfu
  • MA GUOHAO

Assignees

  • 宁波宏德众悦科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260304

Claims (8)

  1. 1. The utility model provides a take long stroke air spring damping device of floating oil blanket which characterized in that includes: a base carrying unit (100) which constitutes a static skeleton and an installation reference of the device; An adaptive floating oil seal unit (200) installed inside the base bearing unit (100); A long-stroke air spring unit (300) coaxially provided inside the axial direction of the adaptive floating oil seal unit (200) and sealingly coupled to the adaptive floating oil seal unit (200); an adjustable damping unit (400) which is embedded in the long-stroke air spring unit (300) and is linked with the long-stroke air spring unit (300); The adaptive floating oil seal unit (200) is configured to be adaptively adjustable with radial runout of a long travel air spring unit (300) to maintain a dynamic seal; The foundation bearing unit (100) comprises a cylinder barrel (101) and an annular step (106), wherein an inner wall of the cylinder barrel (101) is provided with an inward concave ball socket (104), an annular lubricating channel (102) and an arc-shaped lubricating branch channel (105), an oil inlet end of the annular lubricating channel (102) is communicated with a channel interface (103), the annular lubricating channel (102) is communicated with the inward concave ball socket (104) through the arc-shaped lubricating branch channel (105), and the annular step (106) is arranged above the inner wall of the cylinder barrel (101); The self-adaptive floating oil seal unit (200) comprises an oil seal seat (201), a disc spring group (208), a first floating seal ring (206) and a first O-shaped ring (207), wherein a ball head structure (202) matched with the concave ball socket (104) is arranged on the outer surface of the oil seal seat (201), and the ball head structure (202) enables the oil seal seat (201) to swing around the center of a ball.
  2. 2. The long-stroke air spring damping device with the floating oil seal according to claim 1, wherein the outer surface of the ball head structure (202) is connected with a first sealing ring (203), an annular gap formed between the concave ball socket (104) and the ball head structure (202) is sealed by the first sealing ring (203), a clamping groove (204) is formed in the inner surface of the oil seal seat (201), a plurality of oil holes (205) are communicated with the bottom of the inner wall of the clamping groove (204), and the plurality of oil holes (205) are communicated with the annular lubricating channel (102).
  3. 3. The long-stroke air spring damping device with the floating oil seal, as set forth in claim 1, is characterized in that a pressure plate is connected between the bottom of the disc spring group (208) and the top of the oil seal seat (201), the disc spring group (208) provides axial pretightening force for the oil seal seat (201) through the pressure plate, the top of the disc spring group (208) is abutted against the bottom of the annular step (106), the first floating seal ring (206) is embedded on the clamping groove (204) through the first O-shaped ring (207), and a lower support (209) is arranged at the bottom of the inner surface of the oil seal seat (201).
  4. 4. The long-stroke air spring shock absorbing device with the floating oil seal according to claim 3, wherein the long-stroke air spring unit (300) comprises an air spring piston (301), a second floating seal ring (302) and a second O-shaped ring (303), an installation groove and an annular groove (304) are respectively formed in the outer surface of the air spring piston (301), the second floating seal ring (302) is embedded in the installation groove through the second O-shaped ring (303), and the second floating seal ring (302) and the first floating seal ring (206) form a matched seal.
  5. 5. The long-stroke air spring damping device with the floating oil seal according to claim 4, wherein a curved bag type air spring bag (305) and a guide ring (306) are respectively embedded in the inner wall of the annular groove (304), the Qu Nang type air spring bag (305) is matched with the air spring piston (301) to realize long-stroke elastic buffering, the guide ring (306) is in sliding fit with the inner surface of the oil seal seat (201), and the guide ring is used for ensuring that the air spring piston (301) and the oil seal seat (201) move coaxially, limiting radial deflection of the air spring piston (301) in an allowable range and avoiding local extrusion damage of the curved bag type air spring bag (305).
  6. 6. The long-stroke air spring damping device with a floating oil seal according to claim 5, wherein the Qu Nang air spring bag (305) is matched with the air spring piston (301) to realize long-stroke elastic buffering, a telescopic dustproof protection bag (307) is arranged at the bottom of the guide ring (306), the telescopic dustproof protection bag (307) is coaxially sleeved on the outer side of the Qu Nang air spring bag (305), the bottoms of the telescopic dustproof protection bag (307) and the curved air spring bag (305) are both connected with the top of the lower support (209) in a sealing mode, an inflation interface and a pressure monitoring module are communicated with the outer wall of the Qu Nang air spring bag (305), the inflation interface and the pressure monitoring module are communicated with the curved air spring bag (305) to form independent air path circulation, and a boss (308) is connected with the top of the inner surface of the air spring piston (301).
  7. 7. The long-stroke air spring shock absorbing device with a floating oil seal according to claim 6, wherein the adjustable damping unit (400) comprises a damping cylinder body (401) and a mandrel (402), the damping cylinder body (401) is fixed at the top of the lower support (209), the lower end of the mandrel (402) is slidably arranged in the damping cylinder body (401), and the upper end of the mandrel (402) is rigidly linked with the lower end of the boss (308), so that the buffering action of the long-stroke air spring unit (300) is coordinated with the shock absorbing action of the adjustable damping unit (400).
  8. 8. The long-stroke air spring damping device with the floating oil seal according to claim 7, wherein a guide sleeve (403) is arranged at the top of the damping cylinder body (401), the inner surface of the guide sleeve (403) is matched and connected with the outer surface of the mandrel (402), an external adjustable valve group is communicated with the outer surface of the damping cylinder body (401), the adjustable valve group is electrically connected with the pressure monitoring module, the pressure in the Qu Nang type air spring bag (305) can be fed back in real time, and the damping force can be dynamically adjusted according to the working condition load.

Description

Long-stroke air spring damping device with floating oil seal Technical Field The invention relates to the technical field of heavy equipment damping, in particular to a long-stroke air spring damping device with a floating oil seal. Background The long-stroke air spring damping technology with the floating oil seal is a core technology path for solving the challenges of severe impact, large deflection and severe environment of heavy equipment under complex road conditions, the comprehensive performance of the long-stroke air spring damping technology directly determines the running smoothness, the operating stability, the service life of parts and the attendance rate of the equipment, and along with the continuous improvement of the high-load, long-stroke, high-reliability and maintenance-free performance requirements of high-end equipment, an integrated damping device capable of simultaneously solving the contradiction between elastic buffering, damping attenuation and dynamic sealing is developed, so that the urgent requirement ‌ ‌ for breaking through the bottleneck of the prior art and realizing the performance upgrading of the equipment is formed. The core contradiction of the existing long-stroke air spring damping device with a floating oil seal is that the compound requirements of extreme working conditions on large-stroke buffering, large-deflection self-adaption and high-reliability sealing are systematically conflicted with the traditional modularized assembly design and static parameter matching concepts; the traditional technology mechanically connects sealing, elasticity and damping units in series, and fixes parameters such as oil seal pretightening force, damping coefficient and the like, so that three defects are difficult to adapt to the coupling effect of continuous impact, random deflection and environmental load in actual working conditions, firstly, the sealing reliability and the motion freedom conflict, the long-acting sealing failure are caused, the floating oil seal with rigidity cannot tolerate the radial deflection in the long-stroke motion of a piston, the sealing surface is eccentric wear and oil film rupture, medium leakage and external pollution invasion are caused, the early failure of a key sealing link is caused, the system functions are cooperated to be split, the comprehensive energy efficiency is low, the parameters of each module are statically set, the dynamic coupling with the working condition load is not suitable, the buffer hardness and the sealing member overpressure damage easily occur under heavy-load working conditions, the sealing pretightening is easily insufficient, the medium leakage easily occurs, the device is difficult to keep the optimal protection and damping performance in the full working condition, finally, the maintainability and the environmental tolerance are insufficient, the key sealing member is built-in and is required to be disassembled, the key sealing member is easy to protect against the severe environment, the operation and maintenance cost is high, and the self-adaption system is required to be realized from the design, and the self-adaption requirements of the dynamic sealing system and the full-adaption to be high in the working condition and the mechanical endurance is met. So we propose a long travel air spring damper with floating oil seal to solve the above mentioned problems. Disclosure of Invention The invention aims to provide a long-stroke air spring damping device with a floating oil seal, which fundamentally solves three pain points of sealing failure, performance cracking and maintenance difficulty of the traditional device under extreme working conditions through system integration and cooperation of a basic bearing unit, a self-adaptive floating oil seal unit, a long-stroke air spring unit and an adjustable damping unit. In order to achieve the aim, the invention provides the technical scheme that the long-stroke air spring damping device with the floating oil seal comprises a basic bearing unit, a damping unit and a damping unit, wherein the basic bearing unit forms a static framework and an installation reference of the device; the self-adaptive floating oil seal unit is arranged inside the basic bearing unit; the long-stroke air spring unit is coaxially arranged in the axial direction of the self-adaptive floating oil seal unit and is in sealing coupling with the self-adaptive floating oil seal unit; The adjustable damping unit is embedded in the long-stroke air spring unit and is linked with the long-stroke air spring unit; The adaptive floating oil seal unit is configured to be adaptively adjustable with radial runout of the long travel air spring unit to maintain a dynamic seal. Preferably, the foundation bearing unit comprises a cylinder barrel and an annular step, wherein the inner wall of the cylinder barrel is provided with a concave ball socket, an annular lubrication channel and an arc lubrication branch chan