A dynamic seal for low temperature high speed use in liquid engines

Abstract

The utility model discloses a kind of dynamic sealing devices suitable for low-temperature high-speed use of liquid engine, it is related to dynamic sealing technical field, the utility model includes sealing pipe, the inner wall of sealing pipe is connected with connecting rod by screw thread, the utility model is through the mutual cooperation between the rubber block, extruding block and other components inside extrusion sealing connecting assembly, realized through rubber block expands under extrusion and sticks to the inner wall of sealing pipe, can effectively prevent liquid or gas leakage, this sealing mode relies on the elasticity of rubber material, can provide sustained and stable sealing effect under different working conditions, rubber block can be self-adapting deformation when being extruded, thereby maintaining elasticity under low-temperature environment, will not lose sealing performance because of too low temperature, still further strengthen sealing effect by the cooperation of splicing block and rectangular plate, so that the device is more superior in the environment, such as liquid engine, which requires strict sealing.

Description

Technical Field

[0001] This utility model belongs to the field of dynamic sealing technology, and in particular relates to a dynamic sealing device suitable for low-temperature and high-speed use in liquid engines. Background Technology

[0002] This dynamic sealing device is suitable for liquid engines, especially in environments requiring low temperature, high speed, and high pressure, such as aerospace, aviation, and hydraulic systems. Through precisely designed sealing structures and materials, it can provide a reliable seal under extreme conditions, preventing liquid leakage and ensuring the safe and efficient operation of the engine.

[0003] According to a public disclosure of a dynamic sealing device suitable for cryogenic high-speed use in liquid engines (publication number: CN218326202 U), it includes a shaft of a rocket liquid engine turbopump. A bearing and a bushing are fixedly sleeved on the outer wall of the shaft. A dynamic ring is fixedly sleeved on the outer wall of the shaft. A sealing block is fixedly sleeved on the outer wall of the shaft. Two sets of oil filling grooves are symmetrically opened inside the stationary ring. Two sets of oil filling holes are symmetrically opened on both sides of the stationary ring.

[0004] The aforementioned method, which relies on the interaction between components such as bearings and bushings, cannot effectively prevent the sealing performance from being lost due to excessively low temperatures. This results in the rubber block failing to maintain its elasticity in low-temperature environments, leading to a reduction in the sealing effect, which requires improvement. Utility Model Content

[0005] The purpose of this invention is to provide a dynamic sealing device suitable for low-temperature, high-speed use in liquid engines. Through the cooperation of components such as rubber blocks and compression blocks within the compression sealing connection assembly, the rubber blocks expand and adhere tightly to the inner wall of the sealing tube under compression, effectively preventing liquid or gas leakage. This sealing method relies on the elasticity of the rubber material to provide a continuous and stable sealing effect under different operating conditions. The rubber blocks can adaptively deform under compression, thus maintaining elasticity in low-temperature environments and not losing sealing performance due to excessively low temperatures. Furthermore, the cooperation between the splicing blocks and the rectangular plate further enhances the sealing effect, making the device superior in environments requiring strict sealing, such as liquid engines, and solving existing problems.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a dynamic sealing device suitable for low-temperature, high-speed use in liquid engines. It includes a sealing tube, with a connecting rod threaded onto the inner wall of the sealing tube. A compression sealing connection assembly is provided on the inner wall of the sealing tube, the compression sealing connection assembly including a threaded groove on the inner wall of the sealing tube. A round rod is fixedly connected to the end of the connecting rod away from the sealing tube. A rubber block is provided on the inner wall of the sealing tube, and a compression block is fixedly connected to the end of the connecting rod near the sealing tube. A support rod is fixedly connected to the bottom of the rubber block, and a sealing ring is fixedly connected to one end of the support rod.

[0008] Furthermore, the rubber block is located on the displacement trajectory of the extrusion block, and a handle is fixedly connected to the end of the round rod away from the connecting rod. The design of the handle is conducive to driving the connecting rod to rotate.

[0009] Furthermore, the extrusion block is configured as an inverted trapezoid, and the interior of the rubber block includes styrene-butadiene rubber (SBR), neoprene rubber (CR), and fluororubber (FKM). This design of the rubber block is beneficial for sealing the inner wall of the sealing tube.

[0010] Furthermore, the sealing ring is located below the connecting rod, the extrusion block, and the rubber block, a design that facilitates multiple seals.

[0011] Furthermore, a plurality of sealing rings are provided and arranged in a linear array on the inner wall of the sealing tube. A groove is provided on the inner wall of the sealing tube, which facilitates a tighter connection of the sealing rings to the inner wall of the sealing tube.

[0012] Furthermore, a splicing block is fixedly connected to the side of the sealing ring, and a rectangular plate is fixedly connected to the inner wall of the groove. The rectangular plate is located on the displacement trajectory of the splicing block. The design of the splicing block and the rectangular plate helps to make the sealing ring more tightly connected.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model achieves effective prevention of liquid or gas leakage by using the cooperation between components such as rubber blocks and extrusion blocks inside the compression sealing connection assembly. This is achieved by expanding and pressing the rubber blocks tightly against the inner wall of the sealing tube under compression. This sealing method relies on the elasticity of the rubber material to provide a continuous and stable sealing effect under different working conditions. The rubber blocks can adapt to deformation when compressed, thus maintaining elasticity in low-temperature environments and not losing sealing performance due to excessively low temperatures. Furthermore, the cooperation between the splicing blocks and the rectangular plates further enhances the sealing effect, making the device perform even better in environments requiring strict sealing, such as liquid engines.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional cross-sectional view of the sealing tube of this utility model;

[0019] Figure 3 This utility model Figure 2 A three-dimensional magnified structural diagram of A in the middle;

[0020] Figure 4 This is a three-dimensional magnified structural diagram of the splicing block of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Sealing tube; 2. Connecting rod; 3. Extrusion sealing connection assembly; 31. Threaded groove; 32. Round rod; 33. Handle; 34. Extrusion block; 35. Rubber block; 36. Support rod; 37. Sealing ring; 38. Groove; 39. Splicing block; 310. Rectangular plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4As shown, this utility model is a dynamic sealing device suitable for low-temperature, high-speed use in liquid engines, including a sealing tube 1, a connecting rod 2 threadedly connected to the inner wall of the sealing tube 1, a compression sealing connection assembly 3 provided on the inner wall of the sealing tube 1, the compression sealing connection assembly 3 including a threaded groove 31, the threaded groove 31 being opened on the inner wall of the sealing tube 1, a round rod 32 fixedly connected to the end of the connecting rod 2 away from the sealing tube 1, a rubber block 35 provided on the inner wall of the sealing tube 1, a compression block 34 fixedly connected to the end of the connecting rod 2 near the sealing tube 1, a support rod 36 fixedly connected to the bottom of the rubber block 35, and a sealing ring 37 fixedly connected to one end of the support rod 36.

[0025] The rubber block 35 is located on the displacement trajectory of the extrusion block 34, and the end of the round rod 32 away from the connecting rod 2 is fixedly connected to the handle 33. The design of the handle 33 is conducive to driving the connecting rod 2 to rotate.

[0026] The extrusion block 34 is set in an inverted trapezoidal shape, and the interior of the rubber block 35 includes styrene-butadiene rubber (SBR), neoprene rubber (CR), and fluororubber (FKM). This design of the rubber block 35 is beneficial for blocking the inner wall of the sealing tube 1.

[0027] The sealing ring 37 is located below the connecting rod 2, the extrusion block 34, and the rubber block 35. This design is conducive to achieving multiple seals.

[0028] Several sealing rings 37 are provided and are arranged in a linear array on the inner wall of the sealing tube 1. A groove 38 is provided on the inner wall of the sealing tube 1. The groove 38 is provided to facilitate a tighter connection of the sealing rings 37 to the inner wall of the sealing tube 1.

[0029] A splicing block 39 is fixedly connected to the side of the sealing ring 37, and a rectangular plate 310 is fixedly connected to the inner wall of the groove 38. The rectangular plate 310 is located on the displacement trajectory of the splicing block 39. The design of the splicing block 39 and the rectangular plate 310 helps to make the sealing ring 37 more tightly connected.

[0030] A specific application of this embodiment is as follows: The inner wall of the sealing tube 1 is provided with a threaded groove 31, which connects to the relevant interface of the liquid engine. When sealing is required, the handle 33 is held, and the round rod 32, connecting rod 2, and extrusion block 34 are rotated clockwise. This causes the extrusion block 34 to be moved towards the inner wall of the sealing tube 1, connecting the connecting rod 2 and the sealing tube 1. The rubber block 35 is located on the inner wall of the sealing tube 1, along the movement trajectory of the extrusion block 34. When the extrusion block 34 moves towards the inner wall of the sealing tube 1, it extrudes the rubber block 35. Due to its rubber material design, when the rubber block 35 is subjected to extrusion pressure, it moves from the center towards both sides of the inner wall of the sealing tube 1 and adheres tightly to the inner wall, thus achieving extrusion sealing. When the rubber block 35 is extruded from the top, it drives the support rod 36 and sealing ring 37 to move downwards. The sealing ring 37 then drives the splicing block 39 to move downwards. The rectangular plate 310 is located on the movement trajectory of the splicing block 39. When the splicing block 39 moves downward, it passes through the rectangular plate 310, merging the splicing block 39 and the rectangular plate 310 together to further enhance the sealing effect. By expanding and adhering to the inner wall of the sealing tube 1 under compression, the rubber block 35 can effectively prevent liquid or gas leakage. This sealing method relies on the elasticity of the rubber material to provide a continuous and stable sealing effect under different working conditions. The rubber block 35 can adapt to deformation when compressed, thus maintaining elasticity in low-temperature environments and not losing its sealing performance due to excessively low temperatures. In high-speed operating environments, the dynamic response capability of the rubber block 35 can also ensure the sealing effect and prevent leakage caused by vibration or high-speed flowing liquid. Furthermore, the cooperation between the splicing block 39 and the rectangular plate 310 further enhances the sealing effect, making the device perform better in environments requiring strict sealing, such as liquid engines.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dynamic sealing device suitable for low temperature high speed use in liquid engines, comprising a sealing tube (1), characterized in that: A connecting rod (2) is threaded onto the inner wall of the sealing tube (1), and a compression sealing connection assembly (3) is provided on the inner wall of the sealing tube (1). The extrusion sealing connection assembly (3) includes a threaded groove (31) on the inner wall of the sealing tube (1). A round rod (32) is fixedly connected to the end of the connecting rod (2) away from the sealing tube (1). A rubber block (35) is provided on the inner wall of the sealing tube (1). An extrusion block (34) is fixedly connected to the end of the connecting rod (2) near the sealing tube (1). A support rod (36) is fixedly connected to the bottom of the rubber block (35). A sealing ring (37) is fixedly connected to one end of the support rod (36).

2. The dynamic sealing device for cryogenic, high-speed use in liquid engines according to claim 1, characterized in that, The rubber block (35) is located on the displacement trajectory of the extrusion block (34), and a handle (33) is fixedly connected to the end of the round rod (32) away from the connecting rod (2).

3. A dynamic sealing device suitable for low-temperature, high-speed use in liquid engines according to claim 2, characterized in that, The extrusion block (34) is configured in an inverted trapezoidal shape, and the interior of the rubber block (35) includes styrene-butadiene rubber (SBR), chloroprene rubber (CR), and fluororubber (FKM).

4. A dynamic sealing device suitable for cryogenic high-speed use in liquid engines according to claim 3, characterized in that, The sealing ring (37) is located below the connecting rod (2), the extrusion block (34), and the rubber block (35).

5. A dynamic sealing device suitable for cryogenic high-speed use in liquid engines according to claim 4, characterized in that, A plurality of sealing rings (37) are provided and are arranged in a linear array on the inner wall of the sealing tube (1), and a groove (38) is provided on the inner wall of the sealing tube (1).

6. A dynamic sealing device suitable for cryogenic high-speed use in liquid engines according to claim 5, characterized in that, The sealing ring (37) is fixedly connected to a splicing block (39) on its side, and a rectangular plate (310) is fixedly connected to the inner wall of the groove (38). The rectangular plate (310) is located on the displacement trajectory of the splicing block (39).

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