Shaft seal ring installed in inner hole

Abstract

Aiming at the situation that it is difficult to install the sealing ring in the workpiece in the prior art, the present invention proposes a shaft sealing ring installed in the inner hole, which belongs to the technical field of sealing rings and includes a circular ring sealing ring body, on which a connecting section that can fold the inner diameter of the sealing ring to reduce and automatically reset is provided. In the natural state, the structure of the sealing ring looks no different from that of an ordinary sealing ring. When it needs to be installed in the workpiece, the connecting section of the sealing ring can be bent and overlapped to reduce the inner diameter of the sealing ring, so that it is easier for the sealing ring to enter the workpiece that is slightly smaller than the outer diameter of the sealing ring, and at the same time, it will not produce a large deformation, so that most of the sealing ring is on the same horizontal plane, and it can be quickly installed when entering the sealing ring installation groove in the workpiece.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing rings, and in particular relates to a shaft sealing ring installed in an inner hole. Background Art

[0002] Some existing hydraulic workpieces need to seal the sliding shaft due to the particularity of the use environment. Usually, a sealing groove is processed in the inner hole, and an O-ring and a sealing ring are installed for sealing. However, since the inner diameter of the hole is larger than the outer diameter of the sealing ring, the sealing ring sent into the workpiece has to be bent partially, and the bent sealing ring is not on the same plane, so that only a part of the bent sealing ring can be sent into the sealing ring installation groove, and the other part of the sealing ring needs to be gradually adjusted into the sealing ring installation groove, which is very difficult to install and easy to damage the sealing ring. Summary of the invention

[0003] Aiming at the problem that it is difficult to insert a sealing ring into a workpiece for installation in the prior art, the present invention proposes a shaft sealing ring installed in an inner hole.

[0004] To achieve the above object, the present invention provides a shaft sealing ring installed in an inner hole, comprising an annular sealing ring body, wherein the sealing ring body is provided with a connecting section which can reduce the inner diameter of the sealing ring and automatically reset it.

[0005] In the above scheme, the structure of the sealing ring in the natural state looks no different from that of an ordinary sealing ring. When it needs to be installed in a workpiece, the connecting section of the sealing ring can be bent and overlapped to reduce the inner diameter of the sealing ring, thereby making it easier for the sealing ring to enter a workpiece slightly smaller than the outer diameter of the sealing ring. Except for the deformation of the connecting section, the other parts of the sealing ring remain almost unchanged, that is, most of the sealing ring is in the same plane, and most of the sealing ring can be installed in the sealing ring installation groove at one time when entering the sealing ring installation groove in the workpiece. The connecting section can be restored to its original structural position by virtue of its own structural characteristics. The connecting section occupies a small part of the entire sealing ring. Affected by the overall structure of the sealing ring, when the connecting section outside the sealing ring installation groove recovers from the bent state, it will also automatically recover in the direction of the sealing ring installation groove, thereby achieving quick installation.

[0006] Preferably, the connecting section includes a first connecting section and a second connecting section extending from both ends of the sealing ring body, respectively, and a third connecting section connecting both ends of the sealing ring body, and the first connecting section and the second connecting section are respectively attached to both sides of the thickness of the third connecting section. The first connecting section and the third connecting section, and the second connecting section and the third connecting section are not connected together, and the first connecting section and the second connecting section are respectively on both sides of the third connecting section. When an external force is applied to the first connecting section and the second connecting section, the first connecting section and the second connecting section are displaced toward each other, so that the first connecting section and the second connecting section partially overlap, thereby reducing the entire circumference of the sealing ring, and the third connecting section is in a bent state at this time. When the external force is released, the bent third connecting section will automatically return to its original state, so that the first connecting section and the second connecting section are respectively attached to both sides of the thickness of the third connecting section.

[0007] Preferably, the third connecting section includes a first connecting section and a second connecting section extending from both ends of the sealing ring body, respectively, and the first connecting section and the second connecting section are fixedly connected through the third connecting section. The first connecting section and the second connecting section in the present invention are respectively on both sides of the third connecting section, so in order to ensure the consistency of the overall thickness of the sealing ring, the third connecting section and the first connecting section and the second connecting section are not attached to the same horizontal plane, and the third connecting section is required to connect the first connecting section and the second connecting section.

[0008] Preferably, the first connecting section and the first connecting subsection have the same length, and the first connecting section and the first connecting section are both fixedly connected to the same end of the sealing ring body; the second connecting section and the second connecting section have the same length, and the second connecting section and the second connecting section are both fixedly connected to the same end of the sealing ring body. When the first connecting section and the first connecting section are attached together, their end faces at both ends are flush, and when the second connecting section and the second connecting section are attached together, their end faces at both ends are also flush. The first connecting section and the second connecting section are connected through the third connecting section, so the end face of the first connecting section with the same length as the first connecting section facing the third connecting section matches the end face of the third connecting section, and the end face of the second connecting section with the same length as the second connecting section facing the third connecting section matches the other end face of the third connecting section.

[0009] Preferably, the first connecting section, the first connecting subsection, the second connecting section, and the second connecting section have the same thickness; the total thickness of the first connecting section and the first connecting section after being attached together is equal to the thickness of the sealing ring body; the total thickness of the second connecting section and the second connecting section after being attached together is equal to the thickness of the sealing ring body. The sealing ring has the same thickness at all locations, the force-bearing surfaces are on the same horizontal plane, the pressure at all locations of the force-bearing surfaces is the same, and the wear of the pressure-bearing surface of the sealing ring will also be more even.

[0010] Preferably, the thickness of the third connecting segment is equal to the thickness of the sealing ring body, and the first connecting segment and the second connecting segment are fixedly connected on both sides of the length direction of the third connecting segment. The third connecting segment fixedly connects the first connecting segment and the second connecting segment which are not in the same horizontal plane and have a thickness of only half the thickness of the sealing ring.

[0011] Preferably, the thickness of the first connecting segment and the second connecting segment are both half of the thickness of the third connecting segment, the first connecting segment and the second connecting segment are symmetrically arranged on both sides of the thickness of the third connecting segment, the length of the first connecting segment and the second connecting segment is the same, and the length of the third connecting segment is less than the length of the first connecting segment. The thickness of the third connecting segment is thicker than the first connecting segment and the second connecting segment, and the length is shorter than the first connecting segment and the second connecting segment. Compared with the first connecting segment and the second connecting segment, the third connecting segment is not easy to bend. Therefore, the middle part of the first connecting segment and the second connecting segment is the easiest to bend, and during the bending process of the connecting segments, only the first connecting segment and the second connecting segment will bend.

[0012] Preferably, the angle formed at the connection between the first connecting segment and the third connecting segment is a right angle, and the angle formed at the second connecting segment and the third connecting segment is a right angle. The angles formed at the connection between the third connecting segment and the first connecting segment and the second connecting segment are all right angles, then the end face of the free end of the first connecting segment is parallel to the end face of the third connecting segment, and the end face of the free end of the second connecting segment is parallel to the other end face of the third connecting segment, so that when the first connecting segment and the first connecting segment are attached, the end face of the free end of the first connecting segment is also attached to the end face of the third connecting segment. Similarly, when the second connecting segment and the second connecting segment are attached, the end face of the free end of the second connecting segment is also attached to the zero-one end face of the third connecting segment.

[0013] Preferably, the length of the connecting section does not exceed 10% of the circumference of the sealing ring. Controlling the length within 10% of the circumference of the sealing ring has little effect on the strength of the sealing ring.

[0014] Preferably, the sealing ring is elastic, and the sealing ring connecting section can be restored to an unbent state by its own elastic deformation recovery ability after being bent. The sealing ring is installed on the elastic O-ring, so that the sealing ring forms a pre-pressure with the matching shaft after being installed in the workpiece, thereby achieving a sealing effect.

[0015] A method for installing a shaft sealing ring installed in an inner hole comprises the following steps:

[0016] a. Install the O-ring of corresponding size in the sealing ring installation groove;

[0017] b. Apply force from both ends of the connecting section of the sealing ring toward the middle of the connecting section to bend the connecting section;

[0018] c. After bending, first put the non-connecting section of the sealing ring into the sealing ring installation groove;

[0019] d. Cancel the opposing forces applied to both ends of the connection section, so that the connection section returns to its original structure, and the entire sealing ring is properly loaded into the installation groove;

[0020] e. Use tools to stretch the sealing ring from the inner diameter to the outer diameter, so that the outer diameter of the sealing ring is evenly in contact with the O-ring in the sealing ring installation groove to form pre-pressure.

[0021] Compared with the prior art, the present invention has the following beneficial effects: the connecting section of the present invention can be bent and overlapped to reduce the inner diameter of the sealing ring, and the length of the connecting section accounts for less than 10% of the overall circumference of the sealing ring, so that the entire sealing ring is basically in the same plane, and when the sealing ring is installed into the sealing ring installation groove, most of the sealing ring can be installed into the sealing ring installation groove at one time, so that the installation can be quickly realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the present invention after the inner diameter is reduced;

[0023] Figure 2 It is a structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the process of reducing the inner diameter of the invention;

[0025] Figure 4 It is a schematic diagram of the present invention returning to its original structure after the inner diameter is reduced;

[0026] Figure 5 This is a schematic diagram of the present invention when installed into a workpiece.

[0027] Markings in the figure: 1, sealing ring body; 2, first connecting section; 3, second connecting section; 4, first connecting subsection; 5, second connecting subsection; 6, third connecting subsection; 7, workpiece; 8, sealing ring installation groove. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0029] like Figure 1 to Figure 2As shown, a shaft seal ring installed in an inner hole is made of elastic rubber. It includes a circular ring seal ring body 1, and the seal ring body 1 is provided with a connecting section that can fold the circumference of the seal ring to reduce and automatically reset. The length of the connecting section does not exceed 10% of the circumference of the seal ring to minimize the influence of the connecting section on the overall strength of the seal ring. The connecting section includes a first connecting section 2 and a second connecting section 3 extending from both ends of the seal ring body 1, and a third connecting section connecting both ends of the seal ring body 1. The first connecting section 2 and the second connecting section 3 are respectively attached to both sides of the thickness of the third connecting section. The third connecting section includes a first connecting section 4 and a second connecting section 5 extending from both ends of the seal ring body 1, the first connecting section 4 and the first connecting section 2 have the same length, and the first connecting section 4 and the first connecting section 2 are both fixedly connected to the same end of the seal ring body 1; the second connecting section 5 and the second connecting section 3 have the same length, and the second connecting section 5 and the second connecting section 3 are both fixedly connected to the other end of the seal ring body 1. The first connecting section 4 and the second connecting section 5 are fixedly connected through the third connecting section 6. The thickness of the first connecting section 2, the first connecting section 4, the second connecting section 3, and the second connecting section 5 are the same; the first connecting section 2 and the first connecting section 4 are bonded together, and the total thickness after bonding is equal to the thickness of the sealing ring body 1; the second connecting section 3 and the second connecting section 5 are bonded together, and the total thickness after bonding is equal to the thickness of the sealing ring body 1. The thickness of the third connecting section 6 is equal to the thickness of the sealing ring body 1, and the first connecting section 4 and the second connecting section 5 are fixedly connected on both sides of the length direction of the third connecting section 6. The first connecting section 4 and the second connecting section 5 are symmetrically arranged on both sides of the thickness of the third connecting section 6, and the length of the first connecting section 4 and the second connecting section 5 is the same, and the length of the third connecting section 6 is less than the length of the first connecting section 4. The thickness of the third connecting section 6 is thicker than the first connecting section 4 and the second connecting section 5, and the length is shorter than the first connecting section 4 and the second connecting section 5. Compared with the first connecting section 4 and the second connecting section 5, the third connecting section 6 is not easy to bend. Therefore, the middle part of the first connecting segment 4 and the second connecting segment 5 is the easiest to bend. During the bending process of the connecting segments, only the first connecting segment 4 and the second connecting segment 5 will bend. The thickness of the third connecting segment 6 is different from that of the first connecting segment 4 and the second connecting segment 5, forming steps on both sides of the third connecting segment 6, and the thickness of the steps is just the thickness of the first connecting segment 2 or the second connecting segment 3. When the first connecting segment 2 and the first connecting segment 4 are attached, the thickness of the third connecting segment 6 is the same as the thickness of the first connecting segment 2 and the first connecting segment 4; when the second connecting segment 3 and the second connecting segment 5 are attached, the thickness of the third connecting segment 6 is the same as the thickness of the second connecting segment 3 and the second connecting segment 5.At the same time, the angles formed by the connection between the third connecting segment 6 and the first connecting segment 4 and the second connecting segment 5 are all right angles, so the end face of the free end of the first connecting segment 2 is parallel to the end face of the third connecting segment 6, and the end face of the free end of the second connecting segment 3 is parallel to the other end face of the third connecting segment 6, so that when the first connecting segment 2 and the first connecting segment 4 are attached, the end face of the free end of the first connecting segment 2 is also attached to the end face of the third connecting segment 6. Similarly, when the second connecting segment 3 and the second connecting segment 5 are attached, the end face of the free end of the second connecting segment 3 is also attached to the other end face of the third connecting segment 6.

[0030] A method for installing a shaft sealing ring installed in an inner hole comprises the following steps:

[0031] a. Install an O-ring of corresponding size in the sealing ring installation groove 8;

[0032] b. Apply force from both ends of the connecting section of the sealing ring toward the middle of the connecting section to bend the connecting section;

[0033] c. After bending, first put the non-connecting section of the sealing ring into the sealing ring installation groove 8;

[0034] d. Cancel the opposing forces applied to both ends of the connecting section to restore the connecting section to its original structure, and fit the entire sealing ring into the sealing ring installation groove 8;

[0035] e. Use a tool to stretch the sealing ring from the inner diameter to the outer diameter direction of the sealing ring, so that the outer diameter of the sealing ring is evenly in contact with the O-ring in the sealing ring installation groove 8 to form a pre-pressure.

[0036] like Figure 3 As shown, external force is applied to the first connecting section 2 and the second connecting section 3, so that the first connecting section 2 and the second connecting section 3 are displaced toward each other, as shown in FIG. Figure 3 As shown in the direction of the dotted arrow, the first connecting section 2 and the second connecting section 3 are partially overlapped, and the third connecting section is in a bent state, so that the entire inner diameter of the sealing ring becomes smaller, thereby making it easier for the sealing ring to enter the workpiece 7 which is slightly smaller than the outer diameter of the sealing ring. And the entire sealing ring is basically in the same plane, which facilitates the sealing ring to be installed in the sealing ring installation groove 8. When the sealing ring enters the sealing ring installation groove 8, the external force is released, as shown in FIG. Figure 4 As shown, the first connecting segment 4 and the second connecting segment 5 of the third connecting segment in the bent state will be restored to the unbent state by the traction force of the sealing ring body and its own elastic force, as shown in FIG. Figure 4 As shown in the direction of the dotted arrow, the first connecting section 2 and the second connecting section 3 are respectively attached to the thickness sides of the third connecting section, so that the structure of the sealing ring looks no different from that of an ordinary sealing ring.

[0037] The workpiece 7 is generally equipped with a movable shaft. There is a gap between the workpiece 7 and the shaft. In order to reduce friction, lubricating oil is filled between the workpiece 7 and the shaft. The function of the sealing ring is to seal the gap between the workpiece 7 and the shaft so that the lubricating oil does not flow out. Figure 3 As shown, the thickness direction of the sealing ring is the outflow direction of the lubricating oil. The sealing ring is a single structure except for the connecting section, and the sealing effect is good. The step formed by the third connecting segment 6 at the connecting section allows the lubricating oil to enter. The step is formed by the first connecting segment 4 or the second connecting segment 5 with different thicknesses and the third connecting segment 6. The angle formed by the step is a right angle, so the end face of the free end of the first connecting segment 2 or the second connecting segment 3 is parallel to one of the end faces of the length direction of the third connecting segment. The first connecting segment 2 is combined with the first connecting segment 4, and the second connecting segment 3 is fitted with the second connecting segment 5. The greater the pressure of the lubricating oil on the sealing ring, the tighter they fit together, and the less likely the lubricating oil will enter the gap generated by their fitting together. And one end of the first connecting segment 2 and the first connecting segment 4, or the second connecting segment 3 and the second connecting segment 5 are fixedly connected to the sealing ring body 1. The gap generated by the fitting between them disappears at the sealing ring body 1, and the lubricating oil cannot pass through the sealing ring further, so the sealing effect at the connecting segment is the same as the sealing effect of the sealing ring body 1.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A shaft sealing ring installed in an inner hole, characterized in that: It comprises a circular sealing ring body (1), wherein the sealing ring body (1) is provided with a connecting section capable of reducing the inner diameter of the sealing ring and automatically resetting it; The connecting section comprises a first connecting section (2) and a second connecting section (3) respectively extending from two ends of the sealing ring body (1), and a third connecting section connecting the two ends of the sealing ring body (1), the first connecting section (2) and the second connecting section (3) respectively being attached to two sides of the thickness of the third connecting section; The third connecting section comprises a first connecting section (4) and a second connecting section (5) respectively extending from two ends of the sealing ring body (1), and the first connecting section (4) and the second connecting section (5) are fixedly connected via the third connecting section (6); The first connecting section (2) and the first connecting segment (4) are of the same length, and the first connecting section (2) and the first connecting segment (4) are both fixedly connected to the same end of the sealing ring body (1); the second connecting section (3) and the second connecting segment (5) are of the same length, and the second connecting section (3) and the second connecting segment (5) are both fixedly connected to the same end of the sealing ring body (1).

2. The shaft seal ring installed in the inner hole according to claim 1, characterized in that: The first connecting section (2), the first connecting subsection (4), the second connecting section (3), and the second connecting section (5) have the same thickness; the total thickness of the first connecting section (2) and the first connecting section (4) after being bonded together is equal to the thickness of the sealing ring body (1); and the total thickness of the second connecting section (3) and the second connecting section (5) after being bonded together is equal to the thickness of the sealing ring body (1).

3. The shaft seal ring installed in the inner hole according to claim 1, characterized in that: The thickness of the third connecting segment (6) is equal to the thickness of the sealing ring body (1), and the two sides of the third connecting segment (6) in the length direction are respectively fixedly connected to the first connecting segment (4) and the second connecting segment (5).

4. The shaft seal ring installed in the inner hole according to claim 3, characterized in that: The thickness of the first connecting segment (4) and the second connecting segment (5) are both half of the thickness of the third connecting segment (6); the first connecting segment (4) and the second connecting segment (5) are symmetrically arranged on both sides of the thickness of the third connecting segment (6); the length of the first connecting segment (4) and the second connecting segment (5) are the same; and the length of the third connecting segment (6) is less than the length of the first connecting segment (4).

5. The shaft seal ring installed in the inner hole according to claim 3, characterized in that: The angle formed at the connection point between the first connecting segment (4) and the third connecting segment (6) is a right angle, and the angle formed at the connection point between the second connecting segment (5) and the third connecting segment (6) is also a right angle.

6. The shaft seal ring installed in the inner hole according to claim 1, characterized in that: The length of the connecting section shall not exceed 10% of the circumference of the sealing ring.

7. A method for installing a shaft sealing ring installed in an inner hole according to any one of claims 1 to 6, comprising the following steps: a. Install an O-ring of corresponding size in the sealing ring installation groove (8); b. Apply force from both ends of the connecting section of the sealing ring toward the middle of the connecting section to bend the connecting section; c. After bending, first insert the non-connecting section of the sealing ring into the sealing ring installation groove (8); d. Remove the opposing forces applied to the two ends of the connection section, so that the connection section returns to its original structure, and the entire sealing ring is properly loaded into the sealing ring installation groove (8); e. Use a tool to stretch the sealing ring from the inner diameter to the outer diameter direction, so that the outer diameter of the sealing ring is evenly in contact with the O-ring in the sealing ring installation groove (8) to form pre-pressure.

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