A brake seal

Abstract

The application relates to the technical field of sealing rings, in particular to a brake seal, which comprises a brake assembly, a cylinder arranged in the brake shoe base, a brake piston movably arranged in the cylinder, and a sealing ring arranged between the brake piston and the cylinder for sealing; a sealing assembly comprising a plurality of pressure layers abutting the inner side of the sealing ring, and a pressure element arranged on the inner side of each pressure layer; and a cooling assembly arranged on the outer side of the pressure element. The application has the beneficial effect that the rectangular cross-section 'Y' type, 'U' type sealing (lip-shaped sealing) or rectangular cross-section 'D' type sealing (solid extrusion-shaped sealing) is used to replace the 'O' type sealing ring, so that the sealing ring cannot be twisted when reciprocating, is not easy to be damaged, and is durable.

Description

Technical Field

[0001] This invention relates to the field of sealing ring technology, and in particular to a brake seal. Background Technology

[0002] The main function of the generator brake (referred to as the air brake) of the vertical shaft turbine generator set is to brake the rotor when the unit stops (waiting for the speed to drop to a certain value) (shortening the downtime), and to push the rotor when the unit is stopped for a long time or during maintenance (to form an oil film between the thrust bearing and the mirror plate). Currently, the dynamic seal (piston seal) of the brake used in various hydropower stations in China is an "O" ring seal.

[0003] The piston seal of the brake is a reciprocating dynamic seal. Because the "O" ring is a compression seal (it achieves the sealing effect by being squeezed tightly), the "O" ring is easily twisted when the brake piston moves up and down, causing it to twist, resulting in damage and loss of sealing function. Summary of the Invention

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0005] The purpose of this invention is to provide a brake seal.

[0006] Therefore, its purpose is to solve the problem that the brake piston is prone to twisting the "O" ring when it moves up and down, causing it to twist, resulting in damage and loss of sealing function.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a brake seal, comprising a brake assembly, including a brake shoe seat, a cylinder disposed inside the brake shoe seat, a brake piston movably disposed inside the cylinder, and a sealing ring located between the brake piston and the cylinder for sealing; a sealing assembly, comprising multiple pressure-applying layers abutting against the inner side of the sealing ring, each pressure-applying layer having a pressure-applying component installed on its inner side, wherein an installation groove for accommodating the sealing assembly is provided on the outer side of the brake piston; and a cooling assembly sleeved on the outer side of the pressure-applying component. Since the traditional sealing ring installed on the outer side of the brake piston is an "O"-ring, the "O"-ring is easily twisted during the reciprocating motion of the brake piston, causing it to twist and resulting in damage and loss of sealing function. Therefore, this application replaces the "O"-ring with a rectangular cross-section "Y"-type or "U"-type seal (lip seal) or a rectangular cross-section "D"-type seal (solid compression seal), so that the sealing ring will not twist during reciprocating motion, is not easily damaged, and is durable.

[0008] In a preferred embodiment of the brake seal of the present invention, the pressure layer contains a pressure chamber and a cooling chamber. The cooling chamber is U-shaped, and the pressure chamber is located in the middle of the cooling chamber. Because the cooling chamber is U-shaped, one end is an inlet and the other end is an outlet, enabling the circulation of coolant and thus continuously cooling the sealing ring. This effectively prevents the sealing ring from overheating and accelerating aging.

[0009] In a preferred embodiment of the brake seal of the present invention, the pressure-applying component includes a fixed cylinder fixedly disposed on the outside of the pressure-applying layer. A movable block is provided inside the fixed cylinder, and a first piston that slides with the fixed cylinder is fixed to the bottom of the movable block. A heat-absorbing medium is filled between the first piston and the fixed cylinder. The heat-absorbing medium absorbs heat from the outside environment, causing its volume to expand. The heat-absorbing medium is preferably ethanol or other materials with heat-absorbing expansion properties. As its volume increases, it applies pressure to the first piston.

[0010] In a preferred embodiment of the brake sealing of the present invention, a second piston is fixed to the top of the movable block, and a pressure-applying cylinder is fixedly connected to the fixed cylinder above the second piston. The pressure-applying cylinder has an opening communicating with a pressure-applying cavity. A pressure-applying solution is filled between the pressure-applying cylinder and the second piston. When the second piston moves, it pushes the pressure-applying solution into the pressure-applying cavity. The first piston pushes the second piston through the movable block to compress the pressure-applying solution. Since the pressure-applying solution is inert, the influence of external temperature is reduced, allowing the solution to flow into the pressure-applying cavity. This causes deformation of the pressure-applying layer, increasing the pressure on the sealing ring and effectively ensuring the sealing effect.

[0011] In a preferred embodiment of the brake seal of the present invention, the cooling assembly includes a rotating cylinder rotatably mounted on a pressure cylinder. An inclined drive groove is formed inside the rotating cylinder. A control rod is fixed to the outside of the pressure cylinder. A guide groove is formed on the outside of the fixed cylinder corresponding to the drive groove. The control rod extends into the drive groove through the guide groove. During movement, the movable block drives the control rod to move. The control rod moves vertically under the constraint of the guide groove. Therefore, when the control rod applies pressure to the inclined drive groove, the rotating cylinder rotates to a preset angle.

[0012] In a preferred embodiment of the brake seal of the present invention, the rotating cylinder has two cavities for accommodating the flow of coolant, and the pressure-applying cylinder has connecting holes corresponding to the two cavities, which are connected to the cooling cavities. Since the two cavities on the rotating cylinder are connected to the connecting holes, coolant can flow into the cooling cavities, achieving contact cooling and temperature reduction of the sealing ring.

[0013] As a preferred embodiment of the brake seal of the present invention, when the rotating cylinder is in the first position, the connecting hole and the cavity are not connected, and the coolant cannot flow into the cooling cavity; when the drive groove is in the second position, the connecting hole and the cavity are connected, and the coolant flows into the cooling cavity.

[0014] As a preferred embodiment of the brake seal of the present invention, a heat-conducting sheet is embedded in the bottom of the fixed cylinder, and the end of the heat-conducting sheet away from the fixed cylinder abuts against the brake piston.

[0015] As a preferred embodiment of the brake seal of the present invention, the cooling cavity is provided with a deformation layer, and a gap is left between the outer side of the deformation layer and the cooling cavity. When the support ring is deformed by external force, it will cause the deformation layer to wrinkle. When the support ring is no longer under force, it will cause the deformation layer to recover, and its inner wall will be in a taut state. Therefore, the deformation layer can separate the impurities attached to the inner wall through deformation and vibration.

[0016] In a preferred embodiment of the brake seal of the present invention, a plurality of spaced-apart support rings are fixedly provided on the outer side of the deformation layer, and the outer side of the support rings is fixed to the cooling cavity. The support rings are made of elastic material, so the multiple support rings provide support for the interior of the cooling cavity, preventing the pressure layer from blocking the cooling cavity channels and affecting the flow of coolant when deformation occurs.

[0017] The beneficial effects of the brake seal of the present invention are as follows: This application replaces the O-ring seal with a rectangular cross-section "Y" type or "U" type seal (lip seal) or a rectangular cross-section "D" type seal (solid extrusion seal), so that the seal will not be torn during reciprocating motion, is not easily damaged, and is durable; and by sensing the temperature through the pressure-applying component, the seal is subjected to corresponding pressure through the pressure-applying layer according to the temperature change, so as to maintain the sealing effect of the seal. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a partial cross-sectional view of the brake assembly with brake seal in this invention.

[0019] Figure 2 For the brake seal in this invention Figure 1 Enlarged structural diagram of section A in the middle.

[0020] Figure 3This is a three-dimensional structural diagram of the sealing assembly for the brake seal in this invention.

[0021] Figure 4 This is a schematic diagram illustrating the expansion of the pressure layer of the brake seal in this invention.

[0022] Figure 5 This is an exploded structural diagram of the sealing assembly for the brake seal in this invention.

[0023] Figure 6 This is a schematic diagram of the 300-degree exploded structure of the brake seal in this invention.

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of the deformation layer of the brake seal in this invention.

[0025] In the picture: 100. Brake assembly; 101. Brake shoe holder; 102. Cylinder block; 103. Brake piston; 104. Sealing ring; 200. Sealing assembly; 201. Pressure layer; 202. Pressure application element; 201a, Pressure chamber; 201b, Cooling chamber; 201b-1, Deformation layer; 201b-2, Support ring; 202a, Fixed cylinder; 202b, Movable block; 202c, Control lever; 202d, Pressure cylinder body; 300, Cooling assembly; 301, Rotating cylinder; 302, Drive slot; 303, Guide slot; 304, Connecting hole. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1 Reference Figure 1-3This is the first embodiment of the present invention, which provides a brake seal, including a brake assembly 100, which includes a brake shoe seat 101, a cylinder 102 disposed inside the brake shoe seat 101, a brake piston 103 movably disposed inside the cylinder 102, and a sealing ring 104 located between the brake piston 103 and the cylinder 102 for sealing; a sealing assembly 200, which includes a plurality of pressure-applying layers 201 abutting against the inner side of the sealing ring 104, and a pressure-applying element 202 installed on the inner side of each pressure-applying layer 201, wherein the outer side of the brake piston 103 is provided with a mounting groove for accommodating the sealing assembly 200; and a cooling assembly 300, which is sleeved on the outer side of the pressure-applying element 202.

[0030] Specifically, since the sealing ring installed on the outside of the traditional brake piston 103 is an "O" ring, the "O" ring is easily twisted when the brake piston 103 moves up and down, causing it to twist and resulting in damage and loss of sealing function. Therefore, this application replaces the "O" ring with a rectangular cross-section "Y" or "U" type seal (lip seal) or a rectangular cross-section "D" type seal (solid extrusion seal), so that the sealing ring 104 will not twist when it moves back and forth, is not easily damaged, and is durable.

[0031] The sealing ring 104 is preferably made of oil-resistant polyurethane rubber material.

[0032] During long-term operation, the brake piston 103 generates frictional heat, which causes the temperature of the brake piston 103 and the sealing ring 104 to rise. High temperature causes the sealing ring 104 to lose its elasticity, weaken its sealing performance, and cause leakage. Therefore, the pressure applying element 202 senses the temperature and applies pressure to the sealing ring 104 through the pressure applying layer 201 according to the temperature change to maintain the sealing effect of the sealing ring 104. In addition, the pressure applying element 202 can drive the cooling component 300 to communicate with the external coolant in order to cool the sealing ring 104 and effectively prevent the temperature of the sealing ring 104 from rising continuously.

[0033] Example 2 Reference Figure 2-5This is the second embodiment of the present invention. Unlike the previous embodiment, it further includes a pressure-applying cavity 201a and a cooling cavity 201b inside the pressure-applying layer 201. The cooling cavity 201b is U-shaped, and the pressure-applying cavity 201a is located in the middle of the cooling cavity 201b. The pressure-applying component 202 includes a fixed cylinder 202a fixedly disposed on the outside of the pressure-applying layer 201. A movable block 202b is disposed inside the fixed cylinder 202a. A first piston that slides with the fixed cylinder 202a is fixed to the bottom of the movable block 202b, and a heat-absorbing medium is filled between the first piston and the fixed cylinder 202a. A second piston is fixed to the top of the movable block 202b, and a pressure-applying cylinder body 202d fixedly connected to the fixed cylinder 202a is disposed above the second piston. An opening communicating with the pressure-applying cavity 201a is formed on the pressure-applying cylinder body 202d. A pressure-applying solution is filled between the pressure-applying cylinder body 202d and the second piston. When the second piston moves, it pushes the pressure-applying solution into the pressure-applying cavity 201a.

[0034] The heat-absorbing medium absorbs heat from the external environment, causing its volume to expand. The heat-absorbing medium is preferably ethanol or other materials with heat-absorbing expansion properties. For example, when the external temperature is 80°C, the heat-absorbing medium absorbs heat and its volume increases, applying pressure to the first piston. The first piston, through the movable block 202b, pushes the second piston to compress the pressurized solution. This pressurized solution is inert to reduce the influence of the external temperature, thus allowing the pressurized solution to flow into the pressurizing chamber 201a. Figure 4 This causes the pressure layer 201 to deform, increasing the pressure on the sealing ring 104 and effectively ensuring the sealing effect.

[0035] Secondly, the pressure layer 201 is made of a heat-resistant and elastic material. When the temperature drops, the heat-absorbing medium no longer absorbs heat, causing the volume to shrink. At this time, the pressure layer 201 will recover under its own elastic force, thus pushing the internal pressure solution into the pressure cylinder 202d, so that the pressure layer 201 recovers and reduces the pressure on the sealing ring 104, reducing friction loss, and thus realizing automatic compensation of the pressure on the sealing ring 104.

[0036] Example 3 Reference Figure 5-7This is the third embodiment of the present invention, which further provides a brake seal. The cooling assembly 300 includes a rotating cylinder 301 rotatably mounted on a pressure cylinder 202d. An inclined drive groove 302 is formed inside the rotating cylinder 301. A control rod 202c is fixed to the outside of the pressure cylinder 202d. A guide groove 303 is formed on the outside of the fixed cylinder 202a corresponding to the drive groove 302. The control rod 202c passes through the guide groove 303 and extends into the drive groove 302. The rotating cylinder 301 has two cavities for accommodating coolant flow. A connecting hole 304 corresponding to the two cavities is formed on the pressure cylinder 202d, and the connecting hole 304 communicates with the cooling cavity 201b. When the rotating cylinder 301 is in the first position, the connecting hole 304 and the cavities are not connected, and coolant cannot flow into the cooling cavity 201b. When the drive groove 302 is in the second position, the connecting hole 304 and the cavities are connected, and coolant flows into the cooling cavity 201b. A heat-conducting plate is embedded in the bottom of the fixed cylinder 202a, and the end of the heat-conducting plate away from the fixed cylinder 202a abuts against the brake piston 103. Therefore, the heat from the outside can be transferred through the heat-conducting plate, so that the heat-absorbing medium can quickly absorb heat.

[0037] In addition, the movable block 202b will drive the control rod 202c to move during the movement. The control rod 202c moves vertically under the constraint of the guide groove 303. Therefore, when the control rod 202c applies pressure to the inclined drive groove 302, the rotating cylinder 301 will rotate to a preset angle. At this time, the two cavities on the rotating cylinder 301 will be connected to the corresponding connecting hole 304, so the coolant can flow into the cooling chamber 201b to achieve contact cooling and temperature reduction of the sealing ring 104. The cooling chamber 201b is U-shaped, with one end being the liquid inlet and the other end being the liquid outlet, thus enabling the coolant to circulate and continuously cool the sealing ring 104. This effectively prevents the sealing ring 104 from aging due to a further increase in temperature.

[0038] Furthermore, the cavity on the rotating cylinder 301 can be connected to the external cooling pipe to realize the delivery of coolant, and the brake piston 103 can be provided with a cavity in the middle to accommodate the cooling pipe.

[0039] Furthermore, a deformation layer 201b-1 is provided inside the cooling cavity 201b, and a gap is left between the outer side of the deformation layer 201b-1 and the cooling cavity 201b. Multiple spaced support rings 201b-2 are fixedly provided on the outer side of the deformation layer 201b-1, and the outer side of the support rings 201b-2 is fixed to the cooling cavity 201b.

[0040] Among them, the support ring 201b-2 is made of elastic material, so multiple support rings 201b-2 play a supporting role for the interior of the cooling cavity 201b, preventing the pressure layer 201 from blocking the channel of the cooling cavity 201b when it deforms, thus affecting the flow of coolant; and when the support ring 201b-2 is deformed by external force, it will cause the deformation layer 201b-1 to wrinkle. When the support ring 201b-2 is no longer under force, it will cause the deformation layer 201b-1 to recover, and its inner wall is in a taut state. Therefore, the deformation layer 201b-1 can separate the impurities attached to the inner wall through deformation and vibration, thus achieving a self-cleaning effect.

[0041] In summary, the heat-absorbing medium absorbs heat from the external environment, causing its volume to expand. The heat-absorbing medium is preferably ethanol or other materials with heat-absorbing expansion properties. For example, when the external temperature is 80°C, the heat-absorbing medium absorbs heat and its volume increases, applying pressure to the first piston. The first piston, through the movable block 202b, pushes the second piston to compress the pressurized solution. This pressurized solution is inert, reducing the influence of the external temperature. Therefore, the pressurized solution flows into the pressurizing chamber 201a. Figure 4 First, the pressure layer 201 deforms, increasing the pressure on the sealing ring 104 and effectively ensuring the sealing effect. Second, the pressure layer 201 is made of heat-resistant and elastic material. When the temperature drops, the heat-absorbing medium no longer absorbs heat, causing the volume to shrink. At this time, the pressure layer 201 will recover under its own elastic force, thus pushing the internal pressure solution into the pressure cylinder 202d, so that the pressure layer 201 recovers and reduces the pressure on the sealing ring 104, reducing friction loss, and thus realizing automatic compensation of the pressure on the sealing ring 104. During its movement, the movable block 202b drives the control rod 202c to move. Under the constraint of the guide groove 303, the control rod 202c moves vertically. Therefore, when the control rod 202c applies pressure to the inclined drive groove 302, the rotating cylinder 301 will rotate to a preset angle. At this time, the two cavities on the rotating cylinder 301 will be connected to the connecting hole 304, so the coolant can flow into the cooling chamber 201b to achieve contact cooling of the sealing ring 104. The cooling chamber 201b is U-shaped, so one end is the liquid inlet and the other end is the liquid outlet, realizing the circulation of coolant, thereby achieving continuous cooling of the sealing ring 104 and effectively preventing the sealing ring 104 from further rising in temperature and causing accelerated aging.

[0042] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise changed, and the nature or number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0043] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0044] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A brake seal, characterized in that: include, The brake assembly (100) includes a brake shoe seat (101), a cylinder (102) disposed inside the brake shoe seat (101), a brake piston (103) movably disposed inside the cylinder (102), and a sealing ring (104) located between the brake piston (103) and the cylinder (102) for sealing. The sealing assembly (200) includes a plurality of pressure-applying layers (201) that abut against the inner side of the sealing ring (104), and each pressure-applying layer (201) has a pressure-applying element (202) installed on its inner side. The brake piston (103) has a mounting groove on its outer side for accommodating the sealing assembly (200). The pressure-applying layer (201) has a pressure-applying cavity (201a) and a cooling cavity (201b) inside. The cooling cavity (201b) is U-shaped, and the pressure-applying cavity (201a) is located in the middle of the cooling cavity (201b). The pressure-applying component (202) includes a fixed cylinder (202a) fixedly disposed on the outside of the pressure-applying layer (201). A movable block (202b) is provided inside the fixed cylinder (202a). A first piston that slides with the fixed cylinder (202a) is fixed at the bottom of the movable block (202b), and a heat-absorbing medium is filled between the first piston and the fixed cylinder (202a). The movable block (202b) is fixed with a second piston at the top, and a pressure cylinder (202d) is fixedly connected to the fixed cylinder (202a) above the second piston. The pressure cylinder (202d) has an opening communicating with the pressure chamber (201a). The pressure cylinder (202d) and the second piston are filled with a pressure solution. When the second piston moves, the pressure solution is pushed into the pressure chamber (201a). A cooling assembly (300) is sleeved on the outside of the pressure-applying component (202). The cooling assembly (300) includes a rotating cylinder (301) rotatably mounted on the pressure-applying cylinder (202d). An inclined drive groove (302) is provided inside the rotating cylinder (301). A control rod (202c) is fixed on the outside of the pressure-applying cylinder (202d). A guide groove (303) is provided on the outside of the fixed cylinder (202a) corresponding to the position of the drive groove (302). The control rod (202c) passes through the guide groove (303) and extends into the drive groove (302). The rotating cylinder (301) has two cavities inside to accommodate the flow of coolant. The pressure cylinder (202d) has a connecting hole (304) corresponding to the two cavities. The connecting hole (304) is connected to the cooling cavity (201b).

2. The brake seal as described in claim 1, characterized in that: When the rotating cylinder (301) is in the first position, the connecting hole (304) and the cavity are not connected, and the coolant cannot flow into the cooling cavity (201b); when the drive groove (302) is in the second position, the connecting hole (304) and the cavity are connected, and the coolant flows into the cooling cavity (201b).

3. The brake seal as described in claim 2, characterized in that: The bottom of the fixed cylinder (202a) is embedded with a heat-conducting plate, and the end of the heat-conducting plate away from the fixed cylinder (202a) abuts against the brake piston (103).

4. The brake seal as described in claim 1, characterized in that: The cooling cavity (201b) is provided with a deformation layer (201b-1) inside, and there is a gap between the outer side of the deformation layer (201b-1) and the cooling cavity (201b).

5. The brake seal as described in claim 4, characterized in that: Multiple spaced support rings (201b-2) are fixedly provided on the outer side of the deformation layer (201b-1), and the outer side of the support rings (201b-2) is fixed to the cooling cavity (201b).

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