Novel oil cylinder oil leakage rapid processing device
By combining a nickel-titanium alloy shape memory alloy support ring and a fluororubber sealing ring, the leakage problem caused by welding defects in the hydraulic cylinder is solved, achieving adaptive sealing under high temperature and high pressure environments, improving sealing reliability and durability, and reducing maintenance frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-27
AI Technical Summary
Existing hydraulic cylinders, especially welded hydraulic cylinders, are prone to leakage channels due to welding process defects, material fatigue, or long-term high-pressure conditions, leading to oil leakage. Conventional sealants are prone to aging and peeling off under high temperature and high pressure environments, requiring frequent shutdowns for maintenance and affecting testing. Furthermore, applying thick layers of sealant multiple times may cause new cracks.
A nickel-titanium alloy shape memory alloy support ring is adopted, which utilizes the shape memory effect to restore the initial inner diameter at high temperature and generate pre-tightening force. Combined with a fluororubber sealing ring and a ceramic fiber heat insulation layer, an adaptive sealing structure is formed, which enhances the reliability and durability of the seal. Furthermore, the oil leakage gap is dynamically compensated through the compensation groove to avoid jamming.
It achieves adaptive sealing under high pressure and high frequency vibration conditions, improves sealing reliability and durability, reduces maintenance frequency, ensures the stability of the sealing state and the service life of the device, and reduces production interruption losses.
Smart Images
Figure CN224049459U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil cylinder maintenance technical field, concretely relates to a novel oil cylinder leak oil fast processing device. BACKGROUND
[0002] As the core execution element of hydraulic system, hydraulic cylinder converts hydraulic energy into mechanical energy, with the advantages of simple structure, stable movement, no transmission gap, etc., and is widely used in engineering machinery, industrial equipment, metallurgical machinery and other fields. In the manufacturing and use process of the welding type hydraulic cylinder, the cylinder barrel weld area is easy to produce structural defects such as pinhole and micro crack due to welding process defects, material fatigue or long-term high pressure working condition; when high pressure oil acts on the defect site for a long time, a leakage channel will be gradually formed, and if it is not treated in time, it may lead to crack propagation and even cause large area oil leakage accident, not only causing waste of hydraulic oil and environmental pollution, but also causing production efficiency to decrease due to equipment downtime maintenance.
[0003] The existing emergency treatment scheme mainly adopts the way of manually smearing sealant: through the sealant gun or manual operation, the sealant is covered on the oil leakage part, and the temporary sealing is realized by using the physical plugging effect of the solidified gel, which is not only simple to operate, but also low in initial cost.
[0004] However, the conventional sealant is easy to age and degrade in high temperature or high pressure environment, and the adhesion between the gel layer and the metal body quickly decays; at the same time, the long-term erosion of oil will cause the gel to swell and crack, and the high frequency vibration and impact load of the hydraulic system will easily cause the gel layer to fatigue and fall off, which needs frequent downtime for re-coating; and multiple coating will form a thick gel layer on the surface of the cylinder barrel, which not only affects the defect detection during subsequent maintenance, but also may induce new cracks due to local stress concentration. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model provides a novel oil cylinder leak oil fast processing device, which can trigger the shape memory effect at the working temperature of the cylinder barrel by the nickel-titanium alloy memory alloy support ring, automatically restore the initial inner diameter and generate uniform pre-tightening force, enhance the fit of the sealing ring, adapt to high pressure and high frequency vibration working condition, and improve the sealing reliability and durability.
[0006] In order to solve the above technical problems, the utility model provides a novel oil cylinder leak oil fast processing device, which comprises a cylinder barrel, and the oil leakage part of the cylinder barrel is coaxially sleeved with an elastic sealing ring, the elastic sealing ring is provided in a cylindrical body structure, and is used for being attached to the oil leakage part of the cylinder barrel to prevent oil leakage.
[0007] The outer side wall of the elastic sealing ring is connected with a supporting ring for providing support to the elastic sealing ring, the inner diameter of the supporting ring is smaller than the outer diameter of the cylinder barrel, the supporting ring is made of memory alloy material, can be installed at the oil leakage position of the cylinder barrel after being expanded, and restores the initial shape through the memory effect to enhance the fitting degree of the elastic sealing ring to the leakage point.
[0008] The outer side wall of the supporting ring is wrapped with a heat insulation layer made of ceramic fiber belt for maintaining the temperature environment of the supporting ring after the equipment is shut down, avoiding the temperature reduction to cause the supporting ring to relax and the sealing effect to decrease, and enabling the sealing state to be maintained for a short time after the equipment is shut down.
[0009] The elastic sealing ring is made of fluororubber material, is suitable for long-term high-temperature environment, and avoids softening or aging due to high temperature.
[0010] The inner side wall of the elastic sealing ring is uniformly provided with a plurality of circumferentially distributed compensation grooves for compensating the oil leakage gap when the elastic sealing ring is radially contracted and preventing the elastic sealing ring from being stuck during the contraction process.
[0011] The outer side wall of the supporting ring is provided with a fixing member, the fixing member is a split clamp, the clamp comprises two symmetrically arranged half ring bodies, and the supporting ring is fixed to the outer surface of the cylinder barrel through the circumferential clamping force when the bolts on the clamp are screwed.
[0012] The beneficial effects of the above technical scheme of the utility model are as follows:
[0013] 1. Self-adaptive sealing and persistent pre-tightening force: the memory alloy (such as nickel-titanium alloy) supporting ring is adopted, the shape memory effect is triggered at the working temperature of the cylinder barrel, the supporting ring automatically restores the initial inner diameter and generates uniform pre-tightening force, the fitting degree of the elastic sealing ring to the leakage point is continuously enhanced, manual adjustment is not needed, the temperature change of the hydraulic system can be self-adapted, the sealing reliability and persistence are significantly improved, and the utility model is especially suitable for high-pressure and high-frequency vibration working conditions, and avoids the failure problem caused by stress relaxation of the traditional sealing glue.
[0014] 2. High-temperature resistance and aging resistance performance optimization: the elastic sealing ring is made of fluororubber material, and the ceramic fiber heat insulation layer on the outer side of the supporting ring forms double high-temperature resistance protection, the fluororubber can still maintain elasticity and sealing performance in a long-term high-temperature environment, and softening or aging is avoided; the heat insulation layer effectively maintains the working temperature environment of the supporting ring, prevents the pre-tightening force from being attenuated due to temperature reduction after shutdown, ensures the stability of the sealing state, prolongs the service life of the device, and reduces the maintenance frequency.
[0015] 3、Dynamic compensation and anti-stuck structure: the compensation groove on the inner side of the elastic sealing ring is circumferentially distributed, which can dynamically compensate the oil leakage gap through groove deformation when it is radially contracted, and adapt to the irregular surface of different leakage points. At the same time, the compensation groove guides the directional deformation of the elastic sealing ring, reduces the circumferential friction resistance, avoids the phenomenon of sticking during installation or contraction, ensures that the sealing ring is quickly and accurately fitted to the cylinder barrel, and improves the emergency handling efficiency.
[0016] 4、Fast installation and convenient maintenance: the split clamp fixing piece is circumferentially clamped and fixed by bolts, and cooperates with the low-temperature flaring characteristics of the memory alloy support ring to make the device installation unnecessary special tools or complex operation, greatly shortening the downtime maintenance time. In addition, the synergistic effect of the heat insulation layer and the memory alloy can maintain the sealing state after shutdown, which saves time for subsequent thorough maintenance and reduces the loss of production interruption. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a whole structure schematic view of the utility model;
[0018] Figure 2 It is a support ring and its internal component structure schematic view of the utility model;
[0019] Figure 3 It is a heat insulation layer and its internal component structure schematic view of the utility model.
[0020] In the figure: 101, elastic sealing ring; 102, support ring; 103, heat insulation layer; 104, compensation groove; 105, clamp. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the drawings of the embodiments of the utility model to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer. Figures 1-3 The technical scheme of the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.
[0022] A novel oil cylinder oil leakage rapid treatment device, as shown in Figure 1 , 2 , includes a cylinder barrel, and the oil leakage part of the cylinder barrel is coaxially sleeved with an elastic sealing ring 101, that is, when small range or large area oil leakage of the cylinder barrel is found, the elastic sealing ring 101 is sleeved from one end of the push rod, and the elastic sealing ring 101 is pushed to the oil leakage part of the cylinder barrel along the push rod. The elastic sealing ring 101 is provided in a cylindrical body structure, which is used for adapting to the shape of the oil cylinder cylinder barrel and being attached to the oil leakage part of the cylinder barrel, and forms a sealing barrier through elastic deformation, effectively preventing oil leakage.
[0023] As shown in Figure 2 , 3 : the outer side wall of the elastic sealing ring 101 is connected with the support ring 102, which is used to provide support for the elastic sealing ring 101, and further, the inner diameter of the support ring 102 is smaller than the outer diameter of the cylinder barrel, when the support ring 102 and the elastic sealing ring 101 are installed at the oil leakage position of the cylinder barrel, the support ring 102 is expanded by the wedge-shaped opening device, and then it is sleeved with the oil leakage position of the cylinder barrel, the support ring 102 is made of memory alloy material, which can be installed at the oil leakage position of the cylinder barrel after the support ring 102 is expanded, and the initial shape is restored through the memory effect to enhance the fit of the elastic sealing ring 101 to the leakage point.
[0024] Further, the support ring 102 is preferably made of nickel-titanium alloy material, which can restore the initial shape and generate pre-tightening force under the working temperature environment of the cylinder barrel through the shape memory effect, further enhancing the sealing fit of the elastic sealing ring 101 to the leakage point. Because the nickel-titanium alloy has a unique shape memory, the support ring 102 can be expanded by external force at room temperature (so that the inner diameter of the support ring 102 is temporarily greater than the outer diameter of the cylinder barrel), which is convenient for sleeving with the oil leakage position of the cylinder barrel. When it is in the working temperature environment of the cylinder barrel (such as the temperature rise caused by long-term operation of the hydraulic system), the alloy triggers phase change due to temperature, and automatically restores to the initial pre-shape (the inner diameter is smaller than the outer diameter of the cylinder barrel), thereby generating uniform and continuous pre-tightening force on the elastic sealing ring 101, further shrinking the elastic sealing ring 101 to make it more fit the oil leakage position of the cylinder barrel, thereby improving the oil leakage prevention effect.
[0025] As shown in Figure 2 , 3 : the outer side wall of the support ring 102 is wrapped with a heat insulation layer 103, which can prevent the temperature inside the support ring 102 from losing quickly when the oil cylinder stops working, thereby reserving the disassembly time of the oil cylinder after use, avoiding the relaxation of the support ring 102 when the oil cylinder is not disassembled, further providing convenience for the maintenance of the oil cylinder, and avoiding the relaxation of the support ring 102 caused by temperature reduction, which can cause the sealing effect to decrease, so that the sealing state can be maintained for a short time after shutdown.
[0026] The heat insulation layer 103 uses ceramic fiber tape, which can be tightly wrapped around the outer side wall of the support ring 102 by half-laminating, and according to the characteristics of the ceramic fiber tape, it can withstand high temperature for a long time and can tightly fit the curved surface of the support ring 102, and it will not displace under high-frequency vibration of the oil cylinder, and its tensile strength is high, avoiding damage to the heat insulation layer 103 caused by mechanical stress (such as stress when the support ring 102 deforms).
[0027] As shown in Figure 1As shown: the outer side wall of the support ring 102 is provided with a fixing member, which is a split clamp 105, the clamp 105 includes two symmetrically arranged half ring bodies, in use, the clamp 105 is opened and then sleeved on the support ring 102, and then the bolts on the clamp 105 are screwed to lock the clamp 105, so that the clamp 105 fixes the support ring 102 on the outer surface of the cylinder barrel by the circumferential clamping force.
[0028] As shown in Figure 1 , 2 : the elastic sealing ring 101 is made of fluororubber material, so that the elastic sealing ring 101 can adapt to long-term high-temperature environment, avoid softening or aging due to high temperature, prolong the service life of the elastic sealing ring 101, and reduce the maintenance frequency.
[0029] The inner side wall of the elastic sealing ring 101 is uniformly provided with a plurality of circumferentially distributed compensation grooves 104, which are used to compensate the oil leakage gap when the elastic sealing ring 101 shrinks radially, that is, the compensation grooves 104 are uniformly distributed groove structures (the cross section is trapezoidal structure), the groove side wall will be elastically deformed inward, the gap is filled by the elastic deformation of the compensation groove 104, for example, when the oil leakage gap in a certain area is larger, the deformation amount of the corresponding groove body increases, and the deformation amount of the adjacent groove body decreases, so that a continuous self-adaptive fitting curved surface is formed on the inner side of the entire elastic sealing ring 101
[0030] The compensation groove 104 can also prevent the elastic sealing ring 101 from being stuck during shrinkage, because the compensation groove 104 provides directional deformation guidance when the elastic sealing ring 101 shrinks, so that the bevel of the compensation groove 104 forces the material of the elastic sealing ring 101 to deform preferentially in the radial direction (i.e. in the normal direction), thereby reducing the risk of sticking caused by circumferential sliding.
[0031] As shown in Figure 1 , 2 : the compensation groove 104 is provided as a blind groove structure, that is, the compensation groove 104 is located in the middle of the inner side wall of the elastic sealing ring 101, and the two ends of the compensation groove 104 are arranged to penetrate through the two ends of the elastic sealing ring 101, so that the two ends of the elastic sealing ring 101 directly fit the outer wall of the cylinder barrel, and block the oil from leaking outward along the annular end face.
[0032] When the oil leakage of the cylinder is found, the cylinder continues to work is stopped, the support ring 102 and the elastic sealing ring 101 connected thereon are expanded by a wedge-shaped expander, and then are sleeved on the one end of the push rod; when the support ring 102 and the elastic sealing ring 101 connected thereon are sleeved on the oil leakage position, the clamp 105 is opened, and the upper and lower two parts of the clamp 105 are clamped on the outer sidewall of the support ring 102; then the clamp 105 is locked by the bolt; at this time, heat is generated due to the working of the cylinder, and the heat is transferred to the support ring 102, so that the support ring 102 restores the shape before expansion due to its characteristics, and thus the elastic sealing ring 101 can block the oil leakage position of the cylinder, so that the continuous oil leakage of the cylinder in the use process is avoided.
[0033] In addition, it also needs to be explained that, in the description of the utility model, unless there is definite provision and limitation, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.
Claims
1. A novel oil cylinder oil leakage quick processing device, comprising a cylinder barrel, characterized in that: The oil leakage part of the cylinder is coaxially sleeved with an elastic sealing ring (101) for abutting against the oil leakage part of the cylinder to prevent oil leakage; The outer side wall of the elastic sealing ring (101) is connected with a supporting ring (102), and the inner diameter of the supporting ring (102) is smaller than the outer diameter of the cylinder, so as to provide support for the elastic sealing ring (101); The outer side wall of the supporting ring (102) is provided with a fixing member for fixing the supporting ring (102) on the cylinder.
2. The novel oil leakage quick treatment device for oil cylinder according to claim 1, characterized in that: The supporting ring (102) is made of a memory alloy material, which can be installed on the oil leakage part of the cylinder after being expanded, and the initial shape is restored through the memory effect to enhance the abutting degree of the elastic sealing ring (101) to the leakage point.
3. The novel oil leakage quick treatment device for oil cylinder according to claim 2, characterized in that: The supporting ring (102) is made of a nickel-titanium alloy material, which can restore the initial shape and generate a pre-tightening force under the working temperature environment of the cylinder through the shape memory effect, further enhancing the sealing and abutting degree of the elastic sealing ring (101) to the leakage point.
4. The novel oil leakage quick treatment device for oil cylinder of claim 1, wherein: The elastic sealing ring (101) is made of a fluorine rubber material, which is suitable for long-term high-temperature environment and avoids softening or aging due to high temperature.
5. The novel oil leakage quick treatment device for oil cylinder according to claim 3, characterized in that: The outer side wall of the supporting ring (102) is wrapped with a heat insulation layer (103) for maintaining the temperature environment of the supporting ring (102) after the equipment is shut down, thereby maintaining the sealing state.
6. The novel oil leakage quick treatment device for oil cylinder of claim 4, characterized in that: The inner side wall of the elastic sealing ring (101) is uniformly provided with a plurality of circumferentially distributed compensation grooves (104) for compensating the oil leakage gap when the elastic sealing ring (101) contracts radially, and preventing the elastic sealing ring (101) from being stuck during the contraction process.
7. The novel oil leakage quick treatment device for oil cylinder of claim 1, wherein: The fixing member is a split clamp (105) which includes two symmetrically arranged half ring bodies, and the supporting ring (102) is fixed to the outer surface of the cylinder through the circumferential clamping force.