Spring energy storage sealing structure capable of adjusting sealing force

Abstract

The utility model provides a spring energy storage sealing structure capable of adjusting sealing force, which comprises a sealing groove, the sealing groove is provided with an opening, a flexible sealing jacket is arranged in the sealing groove, a first spring and a second spring are respectively arranged on two sides of the inner wall of the flexible sealing jacket, and a T-shaped adjusting ring is arranged in the sealing groove. The T-shaped adjusting ring is located between the first spring and the second spring. The adjustable T-shaped adjusting ring and the adjusting backing ring are additionally arranged between the two internal springs, and the interference of the two springs can be directly changed by adjusting the axial relative positions of the T-shaped adjusting ring structure and the two springs, so that the contact pressure of a sealing area of spring energy storage sealing is changed, the sealing performance is rapidly changed, and the service life of the spring energy storage sealing device is prolonged. The problem that the sealing force of an existing spring energy storage seal cannot be rapidly adjusted is solved, and the large popularization value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a spring energy storage sealing structure with adjustable sealing force. Background Art

[0002] The spring energy storage seal mainly consists of an open plastic jacket and a circumferential metal spring installed in the opening. In a typical spring energy storage seal structure, the spring energy storage seal is installed in a groove during use. The groove size is slightly smaller than the seal size to achieve an interference fit. Under the interference, both the outer jacket and the inner spring of the spring energy storage seal ring are compressed, generating a sealing pressure at the contact position between the seal and the sealing groove. Since the stiffness of the inner spring is relatively large, the sealing pressure of the spring energy storage seal ring mainly comes from the spring during normal use.

[0003] However, for the current seal of the spring energy storage seal, once it is manufactured, its contact pressure cannot be adjusted. This is because the contact pressure of the seal is directly related to the interference amount of the seal. The interference amount of the seal is determined by the seal size. Once the seal size is determined, the interference amount of the seal is determined. Further, the contact pressure of the seal is determined. This means that if the sealing performance of a sealing structure does not meet the usage requirements, the design must be changed or the seal must be replaced, and the original seal cannot be used. This greatly increases the design difficulty of the spring energy storage seal.

[0004] Chinese Patent Document CN 210461693U discloses a wide-face double-spring lip seal. Through a specially designed widened jacket, two different spring structures can be installed on the same spring energy storage seal. In theory, the sealing force can be changed by changing the spring and other elastic bodies. However, when the spring size and the groove size are determined, that is, when the interference amount is determined, the sealing force of this device is basically unchanged. Increasing the number of springs can increase the pressure at the sealing interface, but it cannot be adjusted, and there are defects in use and need to be improved.

[0005] Chinese Patent Document CN 207261652U discloses an ultra-low temperature double-layer spring energy storage seal ring. By adding a double-layer spring to a single spring energy storage seal structure, the sealing force of the spring energy storage seal can be effectively improved in a relatively compact spring energy storage seal structure. However, the structure of this inner and outer double-spring is relatively complex. Although it can effectively increase the sealing contact force under the same interference amount, the sealing force of its seal still cannot be adjusted. To adjust the sealing force, the seal size needs to be changed, or the seal spring needs to be replaced. There are defects in use and need to be improved. Summary of the Utility Model

[0006] The utility model provides a spring energy storage sealing structure with adjustable sealing force, which solves the problem that the contact pressure of the existing spring energy storage seal cannot be adjusted. The contact pressure of the seal is directly related to the sealing interference amount. If the sealing performance of a sealing structure does not meet the usage requirements, it is necessary to replace the design or the seal, and the original seal cannot be used, which increases the design difficulty of the spring energy storage seal.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is: a spring energy storage sealing structure with adjustable sealing force, including a sealing groove. The sealing groove has an opening. A flexible sealing jacket is arranged in the sealing groove. First springs and second springs are respectively arranged on both sides of the inner wall of the flexible sealing jacket. A T-shaped adjusting ring is arranged inside the sealing groove, and the T-shaped adjusting ring is located between the first spring and the second spring.

[0008] In a preferred solution, a sealing shaft is arranged on one side of the sealing groove. The cross-section of the sealing groove is a U-shaped structure. The sealing shaft is located on the opening side of the sealing groove, and a sealing cavity is formed between the sealing shaft and the sealing groove.

[0009] In a preferred solution, the T-shaped adjusting ring is rigid. One end of the T-shaped adjusting ring is a protruding end, and the protruding end is a wedge-shaped structure. Both sides of the wedge-shaped structure of the T-shaped adjusting ring respectively abut against the first spring and the second spring, and the T-shaped adjusting ring abuts against the inner wall of the sealing groove.

[0010] In a preferred solution, the flexible sealing jacket is a U-shaped structure, and the protruding end of the T-shaped adjusting ring is located at the top of the U-shaped structure of the flexible sealing jacket.

[0011] In a preferred solution, an adjusting gasket is arranged between the T-shaped adjusting ring and the sealing groove.

[0012] In a preferred solution, a threaded hole is arranged on the sealing groove. A lead screw is arranged on the threaded hole, and the lead screw is connected to the threaded hole. An adjusting handwheel is arranged at the top of the lead screw, and one end of the lead screw abuts against the adjusting gasket.

[0013] In a preferred solution, a through hole is arranged on the sealing groove. A stud is arranged on the through hole of the sealing groove. A gasket is arranged at the top of the through hole of the sealing groove. A bolt is arranged on the stud, and one end of the stud abuts against the adjusting gasket.

[0014] The beneficial effect of the utility model is: a T-shaped adjusting ring is added. One end of the T-shaped adjusting ring is a wedge-shaped structure. By adjusting the position of the wedge-shaped structure of the T-shaped adjusting ring, the adjustment of the sealing force of the spring energy storage seal is realized.

[0015] One way to adjust the position of the wedge structure of the T-shaped adjusting ring can be to add an adjusting spacer ring, and another way can be to change the cross-sectional thickness of the T-shaped adjusting ring so that the position of the wedge structure of the T-shaped adjusting ring changes relative to the height of the sealing groove. Another way to adjust the position of the wedge structure of the T-shaped adjusting ring is to change the mating position between the T-shaped adjusting ring and the sealing groove, such as adjusting the position with a lead screw or a bolt.

[0016] In the present invention, by adding an adjustable T-shaped adjusting ring and an adjusting spacer ring between two internal springs, by adjusting the axial relative position of this T-shaped adjusting ring structure and the two springs, the interference of the two springs can be directly changed, and then the contact pressure of the sealing area of the spring energy storage seal can be changed, quickly changing the sealing performance, solving the problem that the existing spring energy storage seal cannot quickly adjust the sealing force, and having great popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 is a cross-sectional view of the prior art;

[0019] Figure 2 is a cross-sectional view of an embodiment of the present utility model without installing an adjusting spacer ring;

[0020] Figure 3 is a cross-sectional view of an embodiment of the present utility model with an adjusting spacer ring installed;

[0021] Figure 4 is a cross-sectional view of the present utility model with an adjusting spacer ring and a lead screw installed;

[0022] Figure 5 is a cross-sectional view of the present utility model with an adjusting spacer ring and a stud installed;

[0023] In the figure: sealing shaft 1; sealing groove 2; T-shaped adjusting ring 3; first spring 4; second spring 5; flexible sealing jacket 6; adjusting spacer ring 7; threaded hole 8; lead screw 9; adjusting handwheel 901; stud 10; gasket 11; bolt 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiment 1:

[0025] As Figures 1-5Among them, there is a spring energy storage sealing structure with adjustable sealing force, including a sealing groove 2. The sealing groove 2 has an opening. A flexible sealing jacket 6 is arranged in the sealing groove 2. On both sides of the inner wall of the flexible sealing jacket 6, a first spring 4 and a second spring 5 are respectively arranged. A T-shaped adjusting ring 3 is arranged inside the sealing groove 2. The T-shaped adjusting ring 3 is located between the first spring 4 and the second spring 5. With this structure, by adding the T-shaped adjusting ring 3, one end of the T-shaped adjusting ring 3 is a wedge-shaped structure. By adjusting the position of the wedge-shaped structure of the T-shaped adjusting ring 3, the adjustment of the sealing force of the spring energy storage seal is realized.

[0026] One way to adjust the position of the wedge-shaped structure of the T-shaped adjusting ring 3 can be to add an adjusting spacer ring 7, and another way can be to change the cross-sectional thickness of the T-shaped adjusting ring 3 so that the position of the wedge-shaped structure of the T-shaped adjusting ring 3 changes relative to the height of the sealing groove 2. Another way to adjust the position of the wedge-shaped structure of the T-shaped adjusting ring 3 is to change the mating position between the T-shaped adjusting ring 3 and the sealing groove 2, such as adjusting the position with a lead screw 9 or adjusting the position with a bolt 12.

[0027] In the present invention, by adding an adjustable T-shaped adjusting ring 3 and an adjusting spacer ring 7 between two internal springs, by adjusting the structure of the T-shaped adjusting ring 3 and the axial relative position of the two springs, the interference of the two springs can be directly changed, and further the contact pressure of the sealing area of the spring energy storage seal can be changed, quickly changing the sealing performance, and solving the problem that the existing spring energy storage seal cannot quickly adjust the sealing force.

[0028] In a preferred solution, a sealing shaft 1 is arranged on one side of the sealing groove 2. The cross-section of the sealing groove 2 is a U-shaped structure. The sealing shaft 1 is located on the opening side of the sealing groove 2. A sealing cavity is formed between the sealing shaft 1 and the sealing groove 2. With this structure, the T-shaped adjusting ring 3 directly abuts against the inner wall of the sealing groove 2.

[0029] When the T-shaped adjusting ring 3 is used alone, the main function of the T-shaped adjusting ring 3 is to separate the first spring 4 and the second spring 5 so that the two springs will not be distorted due to direct contact.

[0030] Embodiment 2:

[0031] Further described in combination with Embodiment 1:

[0032] In a preferred embodiment, the T-shaped adjusting ring 3 is rigid. One end of the T-shaped adjusting ring 3 is a protruding end, and the protruding end is a wedge-shaped structure. The two sides of the wedge-shaped structure of the T-shaped adjusting ring 3 respectively abut against the first spring 4 and the second spring 5, and the T-shaped adjusting ring 3 abuts against the inner wall of the sealing groove 2. With this structure, an adjusting gasket ring 7 is added to the spring energy storage sealing structure. The adjusting gasket ring 7 changes the relative position of the adjusting gasket ring 7 along the axial direction and between the first spring 4 and the second spring 5 in the sealing structure. Furthermore, the wedge-shaped structure of the T-shaped adjusting ring 3 pre-compresses the first spring 4 and the second spring 5 on both sides, which is equivalent to additionally increasing the local interference of the spring energy storage seal without changing the seal. By adjusting the thickness of the adjusting gasket ring 7 and the wedge angle of the T-shaped adjusting ring 3, the increased interference amount caused by pre-compression can be adjusted to adjust the change amount of the contact pressure.

[0033] In a preferred embodiment, the flexible sealing jacket 6 is a U-shaped structure, and the protruding end of the T-shaped adjusting ring 3 is located at the top of the U-shaped structure of the flexible sealing jacket 6. With this structure, when using adjusting gasket rings 7 with different thicknesses to cooperate with the T-shaped adjusting ring 3, the T-shaped adjusting ring 3 can be used to apply different amounts of interference and interference forces to the springs on both sides. Without changing the size of the sealing cavity and the overall size of the seal, the contact force of the spring energy storage seal can be adjusted with minor modifications, improving the service performance of the spring energy storage seal.

[0034] In a preferred embodiment, an adjusting gasket ring 7 is provided between the T-shaped adjusting ring 3 and the sealing groove 2. With this structure, an adjusting gasket ring 7 is added to the spring energy storage sealing structure. The adjusting gasket ring 7 changes the relative position of the adjusting gasket ring 7 along the axial direction and between the first spring 4 and the second spring 5 in the sealing structure. Furthermore, the wedge-shaped structure of the T-shaped adjusting ring 3 pre-compresses the first spring 4 and the second spring 5 on both sides, which is equivalent to additionally increasing the local interference of the spring energy storage seal without changing the seal. By adjusting the thickness of the adjusting gasket ring 7 and the wedge angle of the T-shaped adjusting ring 3, the increased interference amount caused by pre-compression can be adjusted to adjust the change amount of the contact pressure.

[0035] Example 3:

[0036] Further explanation in combination with Examples 1-2:

[0037] In a preferred embodiment, a threaded hole 8 is provided on the sealing groove 2. A lead screw 9 is provided on the threaded hole 8. The lead screw 9 is connected to the threaded hole 8. An adjusting handwheel 901 is provided at the top of the lead screw 9. One end of the lead screw 9 abuts against the adjusting gasket ring 7. With this structure, drive the adjusting handwheel 901 to rotate the lead screw 9, so that the adjusting gasket ring 7 moves, to adjust the position of the adjusting gasket ring 7 and the T-shaped adjusting ring 3, and further adjust the relative position of the entire T-shaped adjusting ring 3 along the axial direction, and the effect of adjusting the sealing force can also be achieved.

[0038] Example 4:

[0039] Further illustrated in conjunction with Embodiments 1-2:

[0040] In a preferred embodiment, through holes are provided in the sealing groove 2, a stud 10 is provided on the through hole of the sealing groove 2, a gasket 11 is provided at the top of the through hole of the sealing groove 2, a bolt 12 is provided on the stud 10, and one end of the stud 10 abuts against the adjusting washer 7. With this structure, by driving the bolt 12 and changing the relative position of the bolt 12 and the stud 10, the adjusting washer 7 moves axially, thereby changing the sealing force of the spring energy storage sealing structure.

[0041] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A spring energy storage sealing structure with adjustable sealing force, characterized in that: It includes a sealing groove (2) which has an opening. A flexible sealing jacket (6) is arranged inside the sealing groove (2). On both sides of the inner wall of the flexible sealing jacket (6), a first spring (4) and a second spring (5) are respectively arranged. A T-shaped adjusting ring (3) is arranged inside the sealing groove (2), and the T-shaped adjusting ring (3) is located between the first spring (4) and the second spring (5).

2. The spring energy storage sealing structure with adjustable sealing force according to claim 1, characterized in that: A sealing shaft (1) is arranged on one side of the sealing groove (2). The cross-section of the sealing groove (2) is a U-shaped structure. The sealing shaft (1) is located on the opening side of the sealing groove (2), and a sealing cavity is formed between the sealing shaft (1) and the sealing groove (2).

3. The spring energy storage sealing structure with adjustable sealing force according to claim 1, characterized in that: The T-shaped adjusting ring (3) is rigid. One end of the T-shaped adjusting ring (3) is a protruding end, and the protruding end is a wedge-shaped structure. On both sides of the wedge-shaped structure of the T-shaped adjusting ring (3), they respectively abut against the first spring (4) and the second spring (5), and the T-shaped adjusting ring (3) abuts against the inner wall of the sealing groove (2).

4. The spring energy storage sealing structure with adjustable sealing force according to claim 1, characterized in that: The flexible sealing jacket (6) is a U-shaped structure, and the protruding end of the T-shaped adjusting ring (3) is located at the top of the U-shaped structure of the flexible sealing jacket (6).

5. The spring energy storage sealing structure with adjustable sealing force according to claim 1, characterized in that: An adjusting gasket (7) is arranged between the T-shaped adjusting ring (3) and the sealing groove (2).

6. The spring energy storage seal structure with adjustable sealing force according to claim 5, characterized in that: A threaded hole (8) is arranged on the sealing groove (2). A lead screw (9) is arranged on the threaded hole (8), and the lead screw (9) is connected to the threaded hole (8). An adjusting handwheel (901) is arranged at the top of the lead screw (9), and one end of the lead screw (9) abuts against the adjusting gasket (7).

7. The spring energy storage sealing structure with adjustable sealing force according to claim 5, characterized in that: A through hole is arranged on the sealing groove (2). A stud (10) is arranged on the through hole of the sealing groove (2). A gasket (11) is arranged at the top of the through hole of the sealing groove (2). A bolt (12) is arranged on the stud (10), and one end of the stud (10) abuts against the adjusting gasket (7).

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