Flexible sealing strip, sealing element and hydraulic generator

Abstract

The utility model provides a flexible sealing strip, a sealing element and a hydro-generator, the flexible sealing strip comprises a mounting part, a sealing part and a sealing part, the mounting part is in a long strip shape; the sealing part is in a long strip shape, the sealing part and the mounting part extend in parallel and are connected with each other, and the width of the sealing part is gradually reduced in the direction away from the mounting part. The flexible sealing strip can be fixed through the installation part, sealing can be achieved through contact between the sealing part and the sealing face of the component to be sealed, the structure is simple, the width of the sealing part is gradually reduced in the direction away from the installation part, the flexible sealing part can make contact with the component to be sealed with small pressure, and the sealing effect is good. Meanwhile, due to the flexibility and the structure of the sealing part, the sealing part can be fully attached to a component to be sealed, and therefore the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of generator sealing devices, and particularly relates to a flexible sealing strip, a seal and a water turbine generator. Background Art

[0002] Rotary sealing belongs to a type of dynamic sealing and is used to seal rods, shafts, pins, rotary joints, etc. with rotary or oscillating motions. Rotary hydraulic rotations exist in various industrial fields such as construction machinery, building machinery, and automotive equipment.

[0003] Currently, most sealing covers of water turbine generators adopt contact sealing. Materials with good self-lubricating performance are used as sealing teeth, and springs are arranged on the back of the sealing teeth to make the sealing teeth contact the sealing surface, ensuring that the gap between the sealing teeth and the sealing surface is 0, so as to achieve the sealing effect. Its structure is relatively complex, the form is monotonous, it is difficult to replace after wear, and the sealing effect is not good. Summary of the Utility Model

[0004] An embodiment of the utility model provides a flexible sealing strip, a seal and a water turbine generator, which can improve the technical problems of easy wear, difficult replacement and poor sealing effect existing in the existing sealing methods.

[0005] In a first aspect, an embodiment of the utility model provides a flexible sealing strip, including:

[0006] An installation part, which is strip-shaped;

[0007] A sealing part, which is strip-shaped, extends in parallel with and is connected to the installation part. Along the direction away from the installation part, the width of the sealing part gradually decreases.

[0008] In the embodiment of the utility model, the flexible sealing strip can be fixed through the installation part, and sealing can be achieved by the contact between the sealing part and the sealing surface of the component to be sealed. Its structure is simple, and along the direction away from the installation part, the width of the sealing part gradually decreases, enabling the flexible sealing part to contact the component to be sealed with a smaller pressure, thereby reducing the wear degree of the seal. At the same time, due to the flexibility and structure of the sealing part, it can be fully attached to the component to be sealed, thus improving the sealing effect.

[0009] In one embodiment, the installation part and the sealing part are integrally provided.

[0010] In the embodiment of the utility model, by integrally providing the installation part and the sealing part, it is convenient for the processing of the two, and at the same time, the connection stability of the two can be improved.

[0011] In one embodiment, the installation part has a connection surface, the sealing part is connected to the connection surface and is inclined relative to the connection surface.

[0012] In an embodiment of the present utility model, by arranging the sealing portion inclined relative to the connection surface, the contact area between the sealing portion and the surface of the component to be sealed can be increased, thereby enhancing the sealing effect of the sealing portion on the component to be sealed.

[0013] In a second aspect, an embodiment of the present utility model provides a seal, comprising:

[0014] A seal body having a shaft through-hole for the shaft to pass through, and a sealing groove is provided on the hole wall of the shaft through-hole;

[0015] The above-mentioned flexible sealing strip, the mounting portion is fixed in the sealing groove, and the sealing portion extends out of the sealing groove and is configured to abut against the circumferential surface of the shaft.

[0016] In an embodiment of the present utility model, by fixing the mounting portion of the sealing strip in the sealing groove of the seal body, the fixing of the sealing strip is achieved, and by abutting the sealing portion against the circumferential surface of the shaft, the sealing of the oil groove for storing the shaft lubricating oil is achieved, thereby preventing the oil in the oil groove from overflowing from the circumferential surface of the shaft.

[0017] In one embodiment, the sealing groove extends along the circumferential direction of the shaft through-hole.

[0018] In an embodiment of the present utility model, by arranging the sealing groove to extend along the circumferential direction of the shaft through-hole, the sealing strip in the sealing groove can extend along the circumferential direction of the shaft through-hole, and while controlling the amount of the sealing strip used, the sealing effect on the circumferential surface of the shaft can be enhanced.

[0019] In one embodiment, the sealing grooves are arranged concentrically along the circumferential direction of the shaft through-hole.

[0020] In an embodiment of the present utility model, by arranging the sealing grooves concentrically along the circumferential direction of the shaft through-hole, the sealing strip in the sealing groove can be circular, thereby achieving continuous sealing and avoiding leakage at the joints.

[0021] In one embodiment, the sealing groove is arranged in a spiral shape along the circumferential direction of the shaft through-hole.

[0022] In an embodiment of the present utility model, by arranging the sealing groove in a spiral shape along the circumferential direction of the shaft through-hole, effective sealing of the shaft can be achieved, and continuous sealing can be achieved, thereby avoiding leakage at the joints.

[0023] In one embodiment, both ends of the sealing groove respectively penetrate through the hole walls at both axial ends of the shaft through-hole along the axial direction of the shaft through-hole, and the number of turns of the sealing groove extending along the circumferential direction of the shaft through-hole is greater than 1 and less than 3; and / or

[0024] The spiral direction of the sealing groove is configured to be opposite to the rotation direction of the rotating shaft.

[0025] In an embodiment of the present utility model, by making both ends of the sealing groove penetrate through the hole walls of the rotating shaft through-hole along both ends of the axial direction of the rotating shaft through-hole, and controlling the number of extension turns of the sealing groove along the circumferential direction of the rotating shaft through-hole, when the sealing strip needs to be replaced, it is not necessary to remove the sealing member body, and the sealing strip can be directly taken out and a new sealing strip can be put in from both ends of the hole wall of the rotating shaft through-hole along the axial direction of the rotating shaft through-hole. By making the spiral direction of the sealing groove opposite to the rotation direction of the rotating shaft, the sealing strip can play a role in blocking oil, thereby improving the sealing effect.

[0026] In one embodiment, a plurality of the sealing grooves are arranged at intervals, and an included angle exists between the extension direction of the plurality of sealing grooves and the axial direction of the rotating shaft through-hole.

[0027] In an embodiment of the present utility model, by obliquely arranging a plurality of the sealing grooves along the axial direction of the rotating shaft through-hole, the sealing of the rotating shaft can be effectively realized.

[0028] In one embodiment, both ends of the sealing groove penetrate through the hole walls of the rotating shaft through-hole along both ends of the axial direction of the rotating shaft through-hole; and / or

[0029] The extension direction of the sealing groove is opposite to the rotation direction of the rotating shaft.

[0030] In an embodiment of the present utility model, by making both ends of the sealing groove penetrate through the hole walls of the rotating shaft through-hole along both ends of the axial direction of the rotating shaft through-hole, when the sealing strip needs to be replaced, it is not necessary to remove the sealing member body, and the sealing strip can be directly taken out and a new sealing strip can be put in from both ends of the hole wall of the rotating shaft through-hole along the axial direction of the rotating shaft through-hole. By making the extension direction of the sealing groove opposite to the rotation direction of the rotating shaft, the sealing strip can play a role in blocking oil, thereby improving the sealing effect.

[0031] In a third aspect, an embodiment of the present utility model provides a hydro-generator, including the above-mentioned sealing member. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0033] Figure 1 It is a schematic structural diagram of the cross-section of the flexible sealing strip provided by the embodiment of the present utility model;

[0034] Figure 2Schematic diagram of the seal structure provided by an embodiment of the present utility model (flexible sealing strip not assembled);

[0035] Figure 3 is a cross-sectional view of the seal provided by an embodiment of the present utility model along Figure 2 A-A in (flexible sealing strip not assembled);

[0036] Figure 4 Schematic diagram of the seal structure provided by an embodiment of the present utility model (flexible sealing strip not assembled);

[0037] Figure 5 is a cross-sectional view of the seal provided by an embodiment of the present utility model along Figure 4 B-B in (flexible sealing strip not assembled);

[0038] Figure 6 Schematic diagram of the seal structure provided by an embodiment of the present utility model (flexible sealing strip not assembled);

[0039] Figure 7 is a cross-sectional view of the seal provided by an embodiment of the present utility model along Figure 6 C-C in (flexible sealing strip not assembled).

[0040] Description of the drawings: Mounting part - 1; Sealing part - 2; Seal body - 3; Rotating shaft through hole - 31; Sealing groove - 311. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise specified, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0042] Please refer to Figure 1 , in the first aspect, an embodiment of the present utility model provides a flexible sealing strip, including:

[0043] A mounting part 1, which is strip-shaped;

[0044] The sealing portion 2 is strip-shaped, extends in parallel with and is connected to the mounting portion 1, and the width of the sealing portion 2 gradually decreases in the direction away from the mounting portion 1.

[0045] It can be understood that the material of the flexible sealing strip can be formed rubber. The materials of the mounting portion 1 and the sealing portion 2 can be the same or different. The cross-sectional shape and size of the mounting portion 1 can be adjusted according to needs as long as the fixing of the sealing strip can be better achieved. The cross-sectional size of the sealing portion 2 can be adjusted according to the size of the mounting portion 1 and the sealing requirements. The cross-sectional shape of the sealing portion 2 can be conical or trapezoidal and can be adjusted according to the sealing requirements and the material properties of the sealing strip.

[0046] In one embodiment, the mounting portion 1 and the sealing portion 2 are integrally provided.

[0047] It can be understood that the integral setting of the mounting portion 1 and the sealing portion 2 means that the mounting portion 1 and the sealing portion 2 are integrally formed, which is convenient for processing.

[0048] In one embodiment, the mounting portion 1 has a connecting surface, the sealing portion 2 is connected to the connecting surface and is inclined with respect to the connecting surface.

[0049] It can be understood that the inclination angle of the mounting portion 1 with respect to the connecting surface can be adjusted according to the sealing requirements and the material properties of the sealing strip.

[0050] Please refer to Figures 1 to 7 , in the second aspect, an embodiment of the present invention provides a seal for cooperating with a rotating shaft to seal an oil groove storing rotating shaft lubricating oil, and the seal includes:

[0051] A seal body 3 having a rotating shaft through hole 31 for the rotating shaft to pass through, and a sealing groove 311 is provided on the hole wall of the rotating shaft through hole 31;

[0052] The above flexible sealing strip, the mounting portion 1 is fixed in the sealing groove 311, and the sealing portion 2 extends out of the sealing groove 311 and is configured to abut against the circumferential surface of the rotating shaft.

[0053] It can be understood that the seal body 3 can be a sealing cover applied to a hydrogenerator. The seal body 3 can be integrally provided or can be composed of a plurality of split parts combined. The shape of the mounting portion 1 matches the shape of the sealing groove 311, and the mounting portion 1 is stuck in the sealing groove 311 for easy installation. The extending direction and the number of the sealing grooves 311 provided on the hole wall of the rotating shaft through hole 31 can be adjusted according to needs as long as the sufficient contact between the sealing strip and the circumferential surface of the rotating shaft can be effectively achieved.

[0054] In one embodiment, the sealing groove 311 extends circumferentially along the rotating shaft through hole 31.

[0055] It can be understood that the sealing groove 311 extends circumferentially along the shaft through hole 31. The extending direction of the sealing groove 311 can be parallel to the circumferential direction of the shaft through hole 31, or the extending direction of the sealing groove 311 and the circumferential direction of the shaft through hole 31 can form an angle greater than 0° and less than 90°.

[0056] Please refer to Figures 2 to 3 , in an embodiment, the sealing groove 311 is arranged concentrically along the circumferential direction of the shaft through hole 31.

[0057] It can be understood that the sealing groove 311 is arranged concentrically along the circumferential direction of the shaft through hole 31, that is, the sealing strip in the sealing groove 311 is circular, and the center of the sealing strip coincides with the center of the circumferential direction of the shaft through hole 31. The number of circular sealing strips provided can be adjusted as needed.

[0058] Please refer to Figures 6 to 7 , in an embodiment, the sealing groove 311 is arranged in a spiral shape along the circumferential direction of the shaft through hole 31.

[0059] It can be understood that the inclination angle and spiral clearance of the sealing groove 311 arranged in a spiral shape can be adjusted as needed.

[0060] Please refer to Figures 6 to 7 , in an embodiment, both ends of the sealing groove 311 penetrate through the hole wall of the shaft through hole 31 along both ends of the axial direction of the shaft through hole 31, and the number of extending turns of the sealing groove 311 along the circumferential direction of the shaft through hole 31 is greater than 1 and less than 3; and / or

[0061] The spiral direction of the sealing groove 311 is configured to be opposite to the rotation direction of the shaft.

[0062] It can be understood that the spiral direction of the sealing groove 311 is opposite to the rotation direction of the shaft. Exemplarily, one of them is in the clockwise direction and the other is in the counterclockwise direction.

[0063] Please refer to Figures 4 to 5 , in an embodiment, a plurality of the sealing grooves 311 are arranged at intervals, and an angle exists between the extending directions of the plurality of sealing grooves 311 and the axial direction of the shaft through hole 31.

[0064] It can be understood that the interval distance between the sealing grooves 311 and the angle between the extending direction of the sealing groove 311 and the axial direction of the shaft through hole 31 can be set as needed, as long as the sealing strip can be in full contact with the circumferential surface of the shaft and it is convenient to take out and install the sealing strip.

[0065] Please refer to Figures 4 to 5 , in an embodiment, both ends of the sealing groove 311 penetrate through the hole wall of the shaft through hole 31 along both ends of the axial direction of the shaft through hole 31; and / or

[0066] The extending direction of the sealing groove 311 is opposite to the rotation direction of the rotating shaft.

[0067] It can be understood that the extending direction of the sealing groove 311 is opposite to the rotation direction of the rotating shaft, that is, one of them rotates clockwise and the other rotates counterclockwise.

[0068] In a third aspect, an embodiment of the present invention provides a hydrogenerator, including the above-mentioned seal.

[0069] The above has introduced the embodiments of the present invention in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A sealing member, characterized in that: include: A flexible sealing strip, comprising a strip-shaped mounting portion and a strip-shaped sealing portion, wherein the sealing portion and the mounting portion extend in parallel and are connected to each other, and the width of the sealing portion gradually decreases in a direction away from the mounting portion; The sealing body has a shaft through hole for the shaft to pass through, and the hole wall of the shaft through hole is provided with a sealing groove; The mounting portion is fixed in the sealing groove, and the sealing portion extends out of the sealing groove and is configured to abut against the circumferential surface of the rotating shaft; The sealing groove is arranged in a spiral shape along the circumference of the rotating shaft through hole; The spiral direction of the sealing groove is configured to be opposite to the rotation direction of the rotating shaft; or, the sealing grooves are arranged in plurality at intervals, an angle exists between the extension direction of the plurality of sealing grooves and the axial direction of the rotating shaft through hole, and the extension direction of the sealing groove is opposite to the rotation direction of the rotating shaft.

2. The seal according to claim 1, characterized in that The mounting portion is integrally provided with the sealing portion; and / or The mounting portion has a connecting surface, and the sealing portion is connected to the connecting surface and is arranged obliquely relative to the connecting surface.

3. The seal according to claim 1, characterized in that The sealing grooves are arranged along the circumference of the rotating shaft through hole and are co-centered.

4. The seal according to claim 1, characterized in that Two ends of the sealing groove respectively penetrate through the hole wall of the shaft through hole at two ends along the axial direction of the shaft through hole, and the number of extension circles of the sealing groove along the circumferential direction of the shaft through hole is greater than 1 and less than 3.

5. The seal according to claim 1, characterized in that The two ends of the sealing groove respectively penetrate through the hole wall of the shaft through hole at the two ends along the axial direction of the shaft through hole.

6. A hydro-generator, characterized in that: Comprising a seal as claimed in any one of claims 1 to 5.

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