Steel spring vibration isolator and sealing method thereof

Abstract

A steel spring vibration isolator comprises a base with an upward opening and an upper cover covering the base, a steel spring is installed in the base and pressed by the upper cover, and the steel spring vibration isolator is characterized in that the upper cover comprises a metal cover plate, an annular elastic layer and a sealing ring which are sequentially connected into a whole in a sealed mode, and the annular elastic layer is fixedly connected with the base through a bolt locking piece; the sealing ring is clamped between the base and the annular elastic layer to form sealing between the upper cover and the base. The structural stability of the steel spring vibration isolator is improved, the sealing ring is prevented from being positioned through a hoop, the safety performance of the steel spring vibration isolator in the using process is improved, the sealing ring is pre-pressed through the fastening force of the bolt locking piece, the sealing ring does not deform synchronously along with the annular elastic body, the fatigue life of the sealing ring is not affected by fatigue relaxation of the annular elastic body, and the service life of the steel spring vibration isolator is prolonged. The sealing effect between the upper cover and the base in the using period can be effectively guaranteed, the sealing reliability of the steel spring vibration isolator is improved, and the sealing service life of the steel spring vibration isolator is prolonged. The invention further provides a sealing method of the steel spring vibration isolator.

Description

Technical Field

[0001] The invention relates to a steel spring vibration isolator and a sealing method thereof, belonging to the technical field of steel spring floating plate track bed. Background Art

[0002] Steel spring floating plate roadbed is a widely used roadbed in the field of railway traffic engineering technology, with excellent vibration reduction effect. Steel spring isolator is the core component of steel spring floating plate roadbed, which plays a vital role in ensuring the smooth operation of the track system and reducing the vibration interference to the surrounding environment. The elasticity and damping of the steel spring isolator are provided by the steel spring and damping fluid in the isolator, which has a significant impact on the vibration characteristics of the floating plate track. Most steel spring isolators with damping fluid directly load the damping fluid into the base, which requires effective sealing of the bottom cover and the upper cover. The traditional steel spring isolator seals the rubber sealing ring with the cover plate and the base through mechanical extrusion. The sealing rubber ring and the base are compressed laterally by the throat hoop, and there is a risk of falling off between the cover plate, the sealing rubber ring, and the base. If the throat hoop is not installed in place, the sealing and integrity of the product will be reduced. If the throat hoop is broken, the upper cover and the base will be separated and the sealing ring will fall off. For example, the patent document with the publication number CN221320528U records a steel spring isolator structure for a track floating plate, wherein the steel spring isolator includes an upper cover and a lower tube, a spring is arranged in the lower tube, an outer sleeve is arranged on the track floating plate, and the steel spring isolator is placed in the outer sleeve. The upper cover and the lower tube are connected by a sealing ring, and a clamp is also arranged at the connection position between the sealing ring and the upper cover or the lower tube to prevent the sealing ring from falling off. In the above scheme, the sealing ring is clamped on the upper cover and the lower tube by the clamp. During use, the relative movement between the upper cover and the lower tube will cause fatigue of the sealing ring. The clamping position of the clamp and the upper cover and the lower tube will loosen due to the fatigue of the sealing ring. There is also a risk that the upper cover and the lower tube will be separated from the sealing ring. Moreover, if the clamp breaks, it will directly cause the upper cover and the lower tube to separate. The structural stability of the steel spring isolator is poor. Summary of the invention

[0003] The steel spring vibration isolator and the sealing method thereof provided by the present invention improve the structural stability of the steel spring vibration isolator, avoid the use of a clamp to position the sealing ring, improve the safety performance of the steel spring vibration isolator during use, use the fastening force of a bolt locking member to form a pre-pressure on the sealing ring, the sealing ring does not deform synchronously with the annular elastomer, and the fatigue relaxation of the annular elastomer does not affect the fatigue life of the sealing ring. The sealing effect between the upper cover and the base during the use cycle can be effectively guaranteed, the sealing reliability of the steel spring vibration isolator is improved, and the sealing life thereof is extended.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The steel spring vibration isolator comprises an upwardly opening base and an upper cover covering the base, wherein the steel spring is installed in the base and is compressed by the upper cover, and is characterized in that the upper cover comprises a metal cover plate, an annular elastic layer and a sealing ring which are sealed and connected as a whole in sequence, the annular elastic layer and the base are fixedly connected by a bolt locking member, and the sealing ring is clamped between the base and the annular elastic layer to form a seal between the upper cover and the base.

[0005] Preferably, the annular elastic layer includes a rubber layer and a metal ring vulcanized on the rubber layer, the bolt locking members are evenly distributed circumferentially on the metal ring, the bolt locking members fasten the metal ring to the base, and the sealing ring is connected to the bottom of the rubber layer and clamped between the metal ring and the base.

[0006] Preferably, the rubber layer and the sealing ring are integrally formed, and the metal ring is vulcanized between the rubber layer and the sealing ring.

[0007] Preferably, an annular groove is formed between the rubber layer and the sealing ring, and the metal ring is vulcanized in the annular groove.

[0008] Preferably, an inner convex ring corresponding to the annular groove is integrally formed on the inner wall of the rubber layer, and the annular groove extends from the outer wall of the rubber layer into the inner convex ring.

[0009] Preferably, the axial thicknesses of the rubber layer, the metal ring and the sealing ring decrease in sequence, and the axial thickness of the sealing ring is not less than 5 mm.

[0010] Preferably, the metal ring extends outwardly with connecting ears evenly distributed in the circumferential direction, the top of the base has mating ears corresponding to the connecting ears, the bolt locking piece axially fixes the connecting ears and the mating ears, and the connecting ears are axially aligned with the lugs of the metal cover plate.

[0011] The sealing method of the steel spring isolator described above is characterized in that: First, according to the sealing requirements and operating conditions of the steel spring isolator, determine the contact area between the sealing ring and the base, the thickness of the sealing ring and the pre-compression amount, so as to determine the number and tightening force of the bolt locking parts; Then, the metal cover plate, the annular elastic layer and the sealing ring are sealed and connected into one body; Finally, the base with the steel spring is fixedly connected to the annular elastic layer by bolt locking parts, and the sealing ring is clamped between the base and the annular elastic layer.

[0012] Preferably, "connecting the metal cover plate, the annular elastic layer and the sealing ring into one body" specifically means firstly forming the rubber layer and the sealing ring into one body by rubber vulcanization, forming an annular groove between the rubber layer and the sealing ring, and then placing the metal cover plate on the top surface of the rubber layer, inserting the metal ring into the annular groove, and finally connecting the metal cover plate, the metal ring, the rubber layer and the sealing ring into a whole by vulcanization.

[0013] The beneficial effects of the invention are: The steel spring vibration isolator of the present invention comprises a metal cover plate, an annular elastic layer and a sealing ring which are sequentially sealed and connected to form a whole. The annular elastic layer is fixedly connected to the base by a bolt locking member, so that a rigid connection between the upper cover and the base is formed, and a seal between the upper cover and the base is formed. The annular elastic body and the steel spring are synchronously deformed to form a damping force, so as to ensure the damping vibration isolation performance of the steel spring vibration isolator. The metal cover plate, the annular elastic layer and the sealing ring are connected to form a whole, so as to reduce scattered parts and ensure that the metal cover plate is not easily separated from the sealing ring. The annular elastic layer is fixedly connected to the base by a bolt locking member to clamp the sealing ring, so as to improve the steel spring The structural stability of the vibration isolator avoids the use of clamps to position the sealing ring, improves the safety performance of the steel spring vibration isolator during use, uses the tightening force of the bolt locking piece to pre-press the sealing ring, improves the sealing reliability, and ensures that the base is not easy to separate from the sealing ring. The sealing ring is clamped between the base and the annular elastomer to form a full-circle contact seal. The sealing ring does not deform synchronously with the annular elastomer, and the fatigue relaxation of the annular elastomer does not affect the fatigue life of the sealing ring. It can effectively ensure the sealing effect between the upper cover and the base during the use cycle, improve the sealing reliability of the steel spring vibration isolator, and extend its sealing life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the steel spring vibration isolator in the present invention.

[0015] Figure 2 A schematic diagram of the upper cover.

[0016] Figure 3 Schematic diagram of a metal ring.

[0017] Figure 4 It is a schematic diagram of the rubber layer and the sealing ring being integrally formed.

[0018] Figure 5 A schematic diagram of the base. DETAILED DESCRIPTION

[0019] Combine the following Figures 1 to 5 The embodiments of the present invention are described in detail.

[0020] The steel spring isolator comprises an upwardly open base 1 and an upper cover 2 covering the base. The steel spring is installed in the base 1 and is pressed by the upper cover 2. The characteristic is that the upper cover 2 comprises a metal cover plate 3, an annular elastic layer 4 and a sealing ring 5 which are sealed and connected as a whole in sequence. The annular elastic layer 4 is fixedly connected to the base 1 by a bolt locking member 6. The sealing ring 5 is clamped between the base 1 and the annular elastic layer 4 to form a seal between the upper cover 2 and the base 1.

[0021] The steel spring isolator described above, the upper cover 2 includes a metal cover plate 3, an annular elastic layer 4 and a sealing ring 5 which are sealed and connected in sequence to form a whole. The annular elastic layer 4 and the base 1 are fixedly connected by a bolt locking member 6, that is, a rigid connection between the upper cover 2 and the base 1 is formed, and a seal between the upper cover and the base is formed. The annular elastic body 4 and the steel spring are deformed synchronously to form a damping force to ensure the damping and vibration isolation performance of the steel spring isolator. The metal cover plate 3, the annular elastic layer 4 and the sealing ring 5 are connected as a whole to reduce scattered parts and ensure that the metal cover plate 3 is not easily separated from the sealing ring 5. The annular elastic layer 4 and the base 1 are fixedly connected by a bolt locking member to clamp the sealing ring 5, which provides The structural stability of the high steel spring vibration isolator is avoided by using a clamp to position the sealing ring, thereby improving the safety performance of the steel spring vibration isolator during use, and using the tightening force of the bolt locking member 6 to pre-press the sealing ring, thereby improving the sealing reliability and ensuring that the base 1 is not easily separated from the sealing ring 4. The sealing ring 5 is clamped between the base 1 and the annular elastomer 4 to form a full-circle contact seal, and the sealing ring 5 does not deform synchronously with the annular elastomer 4. The fatigue relaxation of the annular elastomer 4 does not affect the fatigue life of the sealing ring 5, which can effectively ensure the sealing effect between the upper cover 2 and the base 1 during the use cycle, thereby improving the sealing reliability of the steel spring vibration isolator and extending its sealing life.

[0022] The annular elastic layer 4 includes a rubber layer 7 and a metal ring 8 vulcanized on the rubber layer 7, and bolt locking members 6 are evenly distributed on the metal ring 8 along the circumferential direction. The bolt locking members 6 fasten the metal ring 8 to the base 4, and the sealing ring 5 is connected to the bottom of the rubber layer 7 and clamped between the metal ring 8 and the base 1. The metal ring 8 is vulcanized on the rubber layer 7, and the sealing ring 5 is arranged at the bottom of the rubber layer 7. The metal ring 8 and the base 1 are fastened together by the bolt locking assembly 6, that is, the connection between the upper cover 2 and the base 1 is formed, and the sealing ring 5 is clamped between the metal ring 8 and the base 1 to form a seal between the upper cover 2 and the base 1. When bearing, the rubber layer 7 and the steel spring in the base 1 are deformed synchronously to form a damping force. The sealing ring 5 is clamped and will not deform with the deformation of the rubber layer 7, but only plays a sealing role, which can effectively extend its fatigue life and ensure the sealing effect.

[0023] The rubber layer 7 and the sealing ring 5 are integrally formed, and the metal ring 8 is vulcanized between the rubber layer 7 and the sealing ring 5. The integral structure of the rubber layer 7 and the sealing ring 5 is formed by rubber vulcanization, and the metal ring 8 and the metal upper cover 3 are vulcanized on the integral structure of the rubber layer 7 and the sealing ring 5 to form an upper cover 2 of an integral structure. The upper cover 2 is not assembled by parts, but is formed as a whole by vulcanization, which simplifies the upper cover structure and improves the structural stability of the steel spring isolator.

[0024] An annular groove 9 is formed between the rubber layer 7 and the sealing ring 5, and the metal ring 8 is vulcanized in the annular groove 9. The annular groove 9 is provided to increase the vulcanization bonding area of ​​the metal ring 8, thereby ensuring that the metal ring 8, the rubber layer 7 and the sealing ring 5 are vulcanized to form a stable integral structure.

[0025] Among them, an inner convex ring 10 corresponding to the annular groove 8 is integrally formed on the inner wall of the rubber layer 7, and the annular groove 9 extends from the outer wall of the rubber layer 7 to the inner convex ring 10. The provision of the inner convex ring 10 increases the depth of the annular groove 8, further increases the vulcanization bonding area of ​​the metal ring 8, the rubber layer 7 and the sealing ring 5, and increases the width of the metal ring 8, thereby increasing the pressing force of the metal ring 8 on the sealing ring 5 after the bolt locking member 6 is tightened, so that the sealing ring 5 is pre-compressed, thereby improving the sealing reliability.

[0026] Among them, the axial thicknesses of the rubber layer 7, the metal ring 8, and the sealing ring 5 decrease in sequence, and the axial thickness of the sealing ring 5 is not less than 5 mm. The rubber layer 7 and the steel spring are synchronously loaded and deformed, and the axial thickness is the largest to prevent the rubber layer 7 from being permanently crushed during the load-bearing process. The thickness of the metal ring 8 is slightly larger than that of the sealing ring 5, ensuring that the metal ring 8 can effectively press the sealing ring 5, so that the sealing ring 5 is pre-compressed and the sealing reliability is improved.

[0027] The metal ring 8 extends outwardly to form a connection ear 81 evenly distributed in the circumferential direction, and the top of the base 1 has a matching ear 11 corresponding to the connection ear. The bolt locking member 6 axially fixes the connection ear 81 with the matching ear 11, and the connection ear 81 is aligned with the lug of the metal cover plate 3 in the axial direction, which is convenient for the steel spring vibration isolator to cooperate with the outer sleeve. The connection ear 81 and the matching ear 11 are connected by the bolt locking member 6, and the sealing ring 5 is pressed against the base 1 by the bolt tightening force. The upper cover 2 and the base 1 are sealed and connected only by the connection of the bolt locking member 6, which simplifies the assembly structure of the steel spring vibration isolator on the basis of ensuring the sealing reliability of the steel spring vibration isolator, and improves the structural stability of the steel spring vibration isolator.

[0028] The sealing method of the steel spring isolator described above is characterized in that: First, according to the sealing requirements and use conditions of the steel spring vibration isolator, determine the contact area between the sealing ring 8 and the base 1, the thickness and pre-compression amount of the sealing ring 5, and thus determine the number and tightening force of the bolt locking parts 6; Then, the metal cover plate 3, the annular elastic layer 4 and the sealing ring 5 are sealed and connected into one body; Finally, the base with the steel spring is fixed to the annular elastic layer 4 by means of bolt locking members 6 , and the sealing ring 5 is clamped between the base 1 and the annular elastic layer 4 .

[0029] In the sealing method described above, the size of the sealing ring 5 and the pre-compression amount after assembly are first determined according to the sealing requirements and working conditions, and then the metal cover plate 3, the annular elastic layer 4 and the sealing ring 5 are connected into a whole, and finally the annular elastic layer 4 is connected to the base 1. The steel spring isolator has a simple assembly structure, high structural stability, and can form an effective and reliable seal, thereby extending the sealing life.

[0030] Among them, "connecting the metal cover plate 3, the annular elastic layer 4 and the sealing ring 5 into one body" specifically means firstly forming the rubber layer 7 and the sealing ring 5 into one body by rubber vulcanization, forming an annular groove 9 between the rubber layer 7 and the sealing ring 5, then placing the metal cover plate 3 on the top surface of the rubber layer 7, inserting the metal ring 8 into the annular groove 9, and finally connecting the metal cover plate 3, the metal ring 8, the rubber layer 7 and the sealing ring 5 into a whole by vulcanization. Firstly, the rubber layer 7 and the sealing ring 5 of the one-piece structure are formed by rubber vulcanization, and then the metal cover plate 3 and the sealing ring 5 are vulcanized on the one-piece structure of the rubber layer 7 and the sealing ring 5 to form the upper cover 1 formed by metal and rubber vulcanization, avoiding the use of parts to assemble the upper cover. The upper cover 1 has high structural stability and good sealing performance. The rigid connection between the metal ring 8 and the base 1 forms a rigid connection and seal between the upper cover 2 and the base 1, which improves the structural stability of the steel spring isolator and improves the sealing reliability of the steel spring isolator.

[0031] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A steel spring vibration isolator, comprising a base opening upward and an upper cover covering the base, wherein the steel spring is installed in the base and compressed by the upper cover, and is characterized in that: The upper cover comprises a metal cover plate, an annular elastic layer and a sealing ring which are sealed and connected in sequence to form a whole. The annular elastic layer is fixed to the base by a bolt locking member, and the sealing ring is clamped between the base and the annular elastic layer to form a seal between the upper cover and the base.

2. The steel spring isolator according to claim 1, characterized in that: The annular elastic layer includes a rubber layer and a metal ring vulcanized on the rubber layer. The bolt locking pieces are evenly distributed on the metal ring along the circumference. The bolt locking pieces fasten the metal ring to the base. The sealing ring is connected to the bottom of the rubber layer and is clamped between the metal ring and the base.

3. The steel spring isolator according to claim 2, characterized in that: The rubber layer and the sealing ring are integrally formed, and the metal ring is vulcanized between the rubber layer and the sealing ring.

4. The steel spring isolator according to claim 3, characterized in that: An annular groove is formed between the rubber layer and the sealing ring, and the metal ring is vulcanized in the annular groove.

5. The steel spring isolator according to claim 4, characterized in that: An inner convex ring corresponding to the annular groove is integrally formed on the inner wall of the rubber layer, and the annular groove extends from the outer wall of the rubber layer to the inner convex ring.

6. The steel spring isolator according to claim 4, characterized in that: The axial thicknesses of the rubber layer, the metal ring and the sealing ring decrease in sequence, and the axial thickness of the sealing ring is not less than 5 mm.

7. The steel spring isolator according to claim 3, characterized in that: The metal ring extends outwardly with connecting ears evenly distributed along the circumferential direction, and the top of the base has matching ears corresponding to the connecting ears. The bolt locking piece axially fixes the connecting ears with the matching ears, and the connecting ears are axially aligned with the lugs of the metal cover plate.

8. The sealing method of a steel spring isolator according to any one of claims 1 to 7, characterized in that: First, according to the sealing requirements and operating conditions of the steel spring isolator, determine the contact area between the sealing ring and the base, the thickness of the sealing ring and the pre-compression amount, so as to determine the number and tightening force of the bolt locking parts; Then, the metal cover plate, the annular elastic layer and the sealing ring are sealed and connected into one body; Finally, the base with the steel spring is fixedly connected to the annular elastic layer by bolt locking parts, and the sealing ring is clamped between the base and the annular elastic layer.

9. The sealing method of the steel spring isolator according to claim 8, characterized in that: "Connecting the metal cover plate, the annular elastic layer and the sealing ring into one body" specifically means firstly forming the rubber layer and the sealing ring into one body by rubber vulcanization, forming an annular groove between the rubber layer and the sealing ring, then placing the metal cover plate on the top surface of the rubber layer, inserting the metal ring into the annular groove, and finally connecting the metal cover plate, the metal ring, the rubber layer and the sealing ring into a whole by vulcanization.

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