Reciprocating spring seal with low starting force

Abstract

The utility model provides a reciprocating spring seal with low starting force, which relates to the technical field of spring seals and comprises a sealing jacket and a spring, and the sealing jacket sequentially comprises an outer sealing lip body and an inner sealing lip body from outside to inside. When the spring seal is used and a system does not have pressure, the spring provides initial sealing force for the spring seal to enable the lip of the sealing jacket to be tightly attached to a working face to prevent low-pressure leakage, and when the system has pressure, medium pressure acts on all directions in the groove of the spring seal to enable the lip to be tightly attached to a sealing face to prevent low-pressure leakage. The spring seal has the effects of large shrinkage, low load and uniform sealing force, meanwhile, the sealing lip is allowed to be properly abraded, the use cost of the spring seal is reduced, certain shaft jump and deviation can be corrected, and the service life of the spring seal is prolonged. The spring plug seal does not need to provide relatively large starting force during rotary starting, and is more suitable for rotary and reciprocating sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of flood plug seals, in particular to a reciprocating flood plug seal with low starting force. Background Art

[0002] The Pan-Seal is a high-performance seal with a special spring inside a U-shaped Teflon. The appropriate spring force plus the system fluid pressure pushes the sealing lip (surface) out and gently presses the metal surface to be sealed to produce a very excellent sealing effect. The actuation effect of the spring can overcome the slight eccentricity of the metal mating surface and the wear of the sealing lip, and continue to maintain the expected sealing performance; the Pan-Seal can be made according to the AS568A standard O-ring groove and completely replace the general O-ring. Because there is no swelling problem, it can maintain good sealing performance for a long time.

[0003] In the prior art, when seals are used in reciprocating rotation conditions, the seals usually experience uneven sealing force and reduced sealing performance during long-term reciprocating rotation. During rotational start-up, a relatively large starting force is required. At the same time, the seals are prone to wear after long-term rotation. Therefore, the seals need to be inspected and replaced regularly, which increases additional labor costs. During reciprocating motion, the seals may experience axial jump and the position of the seals may move, making them inconvenient to use. To address the above problems, a reciprocating pan-plug seal with a low starting force is proposed. Utility Model Content

[0004] The utility model mainly provides a reciprocating flooded plug seal with low starting force which can correct certain shaft jump and deviation and is commonly used for rotating and reciprocating sealing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a reciprocating flood seal with low starting force, comprising a sealing jacket and a spring, wherein the sealing jacket comprises an outer sealing lip body and an inner sealing lip body from the outside to the inside, a lip opening is arranged between the outer sealing lip body and the inner sealing lip body, a mounting groove is arranged between the outer sealing lip body and the inner sealing lip body near the lip opening, the spring is installed in the mounting groove, a groove contact end is arranged on the sealing jacket on the side of the mounting groove away from the lip opening, an outer convex lip body is arranged on the side of the outer sealing lip body near the lip opening, an outer convex lip body is arranged on the side of the outer convex lip body facing the lip opening, an inner convex lip body is arranged on the side of the inner sealing lip body near the lip opening, and an inner lip body block is arranged on the side of the inner convex lip body facing the lip opening, an inner convex lip body is arranged on the side of the inner sealing lip body near the lip opening, and an inner lip body block is arranged on the side of the inner convex lip body facing the lip opening.

[0006] Preferably, an outer right-angle end is provided between the mounting groove and the outer lip body block, and an inner right-angle end is provided between the mounting groove and the inner lip body block. When the system is under pressure, the medium pressure acts in all directions in the pan-seal groove, so that the lip is tightly attached to the sealing surface, thereby achieving the effect of sealing the sealing surface, and the sealing force is more uniform, achieving a good sealing effect.

[0007] Preferably, the outer sealing lip and the inner sealing lip are of equal length, the outer convex lip and the inner convex lip are of equal length, and the sealing jacket is an inner and outer symmetrical structure. When the sealing lip of the pan-plug seal is slightly worn, it will not lead to a decrease in the sealing performance of the seal, thereby reducing the replacement frequency of the seal.

[0008] Preferably, the spring is arranged in contact with the groove contact end on the sealing jacket, and the cross-section of the installation groove is a rectangular groove structure. When the system has no pressure, the spring provides initial sealing force for the pan-seal, so that the lip of the sealing jacket is close to the working surface to prevent low-pressure leakage.

[0009] Preferably, one end of the spring is arranged in contact with the outer right-angle end, and the other end of the spring is arranged in contact with the inner right-angle end. The outer lip body block, the inner lip body block, the outer right-angle end and the inner right-angle end are combined to allow the spring to be installed in the installation groove to prevent the spring from moving outward, thereby ensuring normal use of the pan-plug seal.

[0010] Preferably, the outer sealing lip, outer convex lip and outer lip block are integrally formed, and the inner sealing lip, inner convex lip and inner lip block are integrally formed. Under the action of the spring, the sealing jacket plays a supporting and sealing role to evenly seal the sealing surface.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. In the utility model, the sealing jacket of the pan-plug seal plays a supporting role and a sealing role. The spring has the characteristics of low load and large compression. The spring is installed in the installation groove and can provide an initial sealing force. When the pan-plug seal is in use, when the system has no pressure, the pan-plug seal provides an initial sealing force by the spring, so that the lip of the sealing jacket is close to the working surface to prevent low-pressure leakage. When the system has pressure, the medium pressure acts in all directions in the pan-plug seal groove, so that the lip is close to the sealing surface, thereby achieving the effect of sealing the sealing surface, and the sealing force is more uniform, achieving a good sealing effect.

[0013] 2. In the utility model, the pan-plug seal allows the sealing lip to wear moderately, and the moderate wear of the sealing lip will not lead to a decrease in the sealing performance of the seal, thereby reducing the replacement frequency of the seal and the use cost of the pan-plug seal. At the same time, it can correct certain shaft jumps and offsets. The pan-plug seal is more suitable for rotary and reciprocating seals, and does not require a relatively large starting force at startup, which saves time and effort and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional schematic diagram of a reciprocating flood seal with low starting force is provided for the utility model;

[0015] Figure 2 The utility model provides a cross-sectional view of a sealing jacket of a reciprocating flood seal with low starting force.

[0016] Legend: 1. Sealing jacket; 2. Spring; 3. External sealing lip; 4. External convex lip; 5. External lip block; 6. External right-angle end; 7. Internal sealing lip; 8. Internal convex lip; 9. Internal lip block; 10. Internal right-angle end; 11. Groove contact end; 12. Lip mouth; 13. Mounting groove. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0019] See also Figure 1 and Figure 2 The utility model provides a technical solution: a reciprocating flood seal with low starting force, comprising a sealing jacket 1 and a spring 2, the sealing jacket 1 comprising an outer sealing lip 3 and an inner sealing lip 7 from outside to inside, a lip 12 is arranged between the outer sealing lip 3 and the inner sealing lip 7, a mounting groove 13 is arranged between the outer sealing lip 3 and the inner sealing lip 7 near the lip 12, the spring 2 is installed in the mounting groove 13, a groove contact end 11 is arranged on the sealing jacket 1 on the side of the mounting groove 13 away from the lip 12, an outer convex lip 4 is arranged on the side of the outer sealing lip 3 near the lip 12, an outer lip block 5 is arranged on the side of the outer convex lip 4 facing the lip 12, an inner convex lip 8 is arranged on the side of the inner sealing lip 7 near the lip 12, and an inner lip block 9 is arranged on the side of the inner convex lip 8 facing the lip 12.

[0020] like Figure 2 As shown, an outer right-angle end 6 is provided between the mounting groove 13 and the outer lip body block 5, and an inner right-angle end 10 is provided between the mounting groove 13 and the inner lip body block 9. When the system is under pressure, the medium pressure acts in all directions in the flood-seal groove, so that the lip 12 is tightly attached to the sealing surface, thereby achieving the effect of sealing the sealing surface, and the sealing force is more uniform, achieving a good sealing effect.

[0021] like Figure 2 As shown, the outer sealing lip 3 and the inner sealing lip 7 are of equal length, the outer convex lip 4 and the inner convex lip 8 are of equal length, and the sealing jacket 1 is an inner and outer symmetrical structure. When the sealing lip of the pan seal is slightly worn, it will not cause the sealing performance of the seal to decrease, thereby reducing the replacement frequency of the seal.

[0022] like Figure 1 and Figure 2 As shown, the spring 2 is arranged in contact with the groove contact end 11 on the sealing jacket 1, and the cross section of the installation groove 13 is a rectangular groove structure. When the system has no pressure, the spring 2 provides the initial sealing force for the flood seal, so that the lip 12 of the sealing jacket 1 is close to the working surface to prevent low-pressure leakage.

[0023] like Figure 1 and Figure 2 As shown, one end of the spring 2 is arranged in contact with the outer right-angle end 6, and the other end of the spring 2 is arranged in contact with the inner right-angle end 10. The outer lip body block 5, the inner lip body block 9, the outer right-angle end 6 and the inner right-angle end 10 are combined to install the spring 2 in the installation groove 13 to prevent the spring 2 from moving outward, thereby ensuring the normal use of the pan seal.

[0024] like Figure 2 As shown, the outer sealing lip 3, the outer convex lip 4 and the outer lip block 5 are integrally formed, and the inner sealing lip 7, the inner convex lip 8 and the inner lip block 9 are integrally formed. Under the action of the spring 2, the sealing jacket 1 plays a supporting and sealing role to evenly seal the sealing surface.

[0025] The use method and working principle of the device: The pan-seal is composed of a sealing jacket 1 and a spring 2 of a special structure. The sealing jacket 1 plays a supporting and sealing role. The spring 2 is a cantilever U-shaped spring with the characteristics of low load and large compression. The spring 2 is installed in the installation groove 13 and can provide an initial sealing force. When the pan-seal is in use, when the system has no pressure, the pan-seal is provided with an initial sealing force by the spring 2, so that the lip 12 of the sealing jacket 1 is close to the working surface to prevent low-pressure leakage. When the system has pressure, the medium pressure acts in all directions in the pan-seal groove, so that the lip 12 is close to the sealing surface, thereby achieving the effect of sealing the sealing surface, and the sealing force is more uniform, achieving a good sealing effect.

[0026] The pan-plug seal has the advantages of large shrinkage, low load and uniform sealing force. At the same time, the pan-plug seal allows the sealing lip to wear moderately. When the sealing lip of the pan-plug seal is slightly worn, it will not lead to a decrease in the sealing performance of the seal, reduce the replacement frequency of the seal, and reduce the use cost of the pan-plug seal. At the same time, it can correct certain shaft jumps and offsets. The pan-plug seal is more suitable for rotary and reciprocating seals. It does not require a relatively large starting force at startup, which saves time and effort and is more convenient to use.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A reciprocating flood seal with low starting force, characterized in that: The invention comprises a sealing jacket (1) and a spring (2), wherein the sealing jacket (1) comprises an outer sealing lip body (3) and an inner sealing lip body (7) in sequence from the outside to the inside, a lip opening (12) is provided between the outer sealing lip body (3) and the inner sealing lip body (7), a mounting groove (13) is provided between the outer sealing lip body (3) and the inner sealing lip body (7) at a position close to the lip opening (12), the spring (2) is installed in the mounting groove (13), a groove contact end (11) is provided on the sealing jacket (1) at a side of the mounting groove (13) away from the lip opening (12), an outer convex lip body (4) is provided on a side of the outer sealing lip body (3) close to the lip opening (12), an outer lip body block (5) is provided on a side of the outer convex lip body (4) facing the lip opening (12), and the inner sealing lip body (7) is close to the lip opening (12). An inner convex lip body (8) is provided on one side of the lip opening (12), an inner lip body block (9) is provided on the inner convex lip body (8) on the side facing the lip opening (12), an outer right-angle end (6) is provided between the mounting groove (13) and the outer lip body block (5), an inner right-angle end (10) is provided between the mounting groove (13) and the inner lip body block (9), the outer sealing lip body (3) and the inner sealing lip body (7) are of equal length, the outer convex lip body (4) and the inner convex lip body (8) are of equal length, the spring (2) is arranged in contact with the groove contact end (11) on the sealing jacket (1), the cross section of the mounting groove (13) is a rectangular groove structure, one end of the spring (2) is arranged in contact with the outer right-angle end (6), and the other end of the spring (2) is arranged in contact with the inner right-angle end (10).

2. A low-starting-force reciprocating flood seal according to claim 1, characterized in that: The outer sealing lip body (3), the outer convex lip body (4) and the outer lip body block (5) are integrally formed, and the inner sealing lip body (7), the inner convex lip body (8) and the inner lip body block (9) are integrally formed.

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