A high-pressure oil receiver device with a gap-type sealing structure

Abstract

This utility model relates to the field of hydraulic turbine technology, and in particular to a high-pressure oil receiver device with a gap-type sealing structure. It includes an oil receiver body and an oil receiver shaft, the oil receiver shaft being installed inside the oil receiver body, and a bushing being fitted over the oil receiver shaft. A gap of 0.03mm to 0.05mm is provided between the oil receiver shaft and the bushing. This utility model optimizes the original cast tin bronze oil receiver body by replacing it with an aerospace-grade aluminum alloy outer shell, with an embedded cast tin bronze bushing. The embedded cast tin bronze bushing ensures the wear resistance of this structure. Furthermore, it eliminates the original multi-seal structure, adopting a gap-type sealing structure. This structure is simple, saves materials, is convenient and quick to process, and reduces costs. After practical application, the temperature rise of the oil receiver bushing is lower, the unit operates stably, the weight is reduced by nearly two-thirds, and the time spent on rotating sealing strips and machining sealing grooves is reduced, saving costs for enterprises.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, and in particular to a high-pressure oil receiver device with an intermittent sealing structure. Background Technology

[0002] Currently, the high-pressure oil receiver of a propeller turbine is a very critical specialized component. It is mainly responsible for introducing the pressure oil of the speed control system from the fixed oil pipe to the rotating operating oil pipe, and then transmitting it to the relay that controls the blade angle, thereby adjusting the blade opening and enabling the unit to always maintain efficient coordinated operation according to load changes.

[0003] like Figure 2 As shown, the existing sealing structure of the high-pressure oil receiver of the propeller turbine is that the entire oil receiver body is made of cast tin bronze and the internal structure adopts a multi-seal structure. Not only does it require high precision machining of the sealing groove, but it also causes a large temperature rise due to the rotational friction between the sealing strip and the oil receiving shaft during operation. Considering the cost and operational stability of the unit, this structure has been optimized. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure oil receiver device with an intermittent sealing structure. This invention optimizes the original cast tin bronze oil receiver body by using an aerospace-grade aluminum alloy outer shell and an embedded cast tin bronze bushing. The embedded cast tin bronze bushing ensures the wear resistance of this structure. Furthermore, it eliminates the original multi-seal structure, adopting an intermittent sealing structure. This structure is simple, saves materials, is convenient and quick to process, and reduces costs. In practical application, the oil receiver bushing temperature rise is low, the unit operates stably, the weight is reduced by nearly two-thirds, and the time spent on rotating the sealing strip and machining the sealing groove is reduced, saving costs for enterprises.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a high-pressure oil receiver device with a gap-type sealing structure, comprising: an oil receiver body and an oil receiver shaft, wherein the oil receiver shaft is installed in the oil receiver body, a bushing is provided on the outer sleeve of the oil receiver shaft, and a gap of 0.03mm to 0.05mm is provided between the oil receiver shaft and the bushing.

[0006] Furthermore, the material of the oil receiver body is aviation aluminum alloy 6061.

[0007] Furthermore, the bushing is made of cast tin bronze.

[0008] The advantages of this utility model are:

[0009] This invention optimizes the original cast tin bronze oil receiver body by replacing it with an aerospace-grade aluminum alloy outer shell and an embedded cast tin bronze bushing. The embedded cast tin bronze bushing ensures the wear resistance of this structure. Furthermore, it eliminates the original multi-seal structure, adopting a gap-type seal structure. This structure is simple, saves materials, is easy and quick to process, and reduces costs. In practical application, the oil receiver bushing exhibits lower temperature rise, and the unit operates stably. It not only reduces weight by nearly two-thirds but also reduces the time spent on rotating the sealing strip and machining the sealing groove, saving costs for the enterprise. Attached Figure Description

[0010] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the existing propeller turbine.

[0013] The components are: 1. oil receiver body; 2. oil receiver shaft; 3. bushing. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Example 1:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 A schematic diagram of the structure of a propeller turbine in the prior art, such as... Figure 1 As shown, this embodiment provides a high-pressure oil receiver device with a gap-type sealing structure. The core design concept of this high-pressure oil receiver device is to replace the contact seal with a precision gap seal, and to achieve weight reduction, cost reduction, and efficiency improvement through optimized material combination. The device mainly consists of the following three core components:

[0018] 1. Oil receiver body 1: serves as the outer shell and main pressure-bearing structure of the device.

[0019] 2. Bushing 3: Press-fitted into the inner hole of the oil receiver body 1, serving as a wear-resistant part that directly mates with the rotating shaft.

[0020] 3. Oil receiving shaft 2: Passes through the bushing 3 and acts as a rotating component to transmit torque and pressure oil.

[0021] The oil receiver body 1 is made of aerospace-grade aluminum alloy 6061. This material choice is a major innovation of this invention, replacing the traditional integral cast tin bronze structure. The oil receiver body 1 is manufactured by forging or precision casting a blank, followed by CNC machining to ensure the precision of its internal oil passages and mounting holes. As described in the background art, the density of aluminum alloy is much lower than that of bronze, reducing the weight of the entire oil receiver device by nearly two-thirds. This is significant for large equipment like water turbines, greatly reducing the labor intensity and lifting difficulty of installation and maintenance. Aerospace-grade aluminum alloy 6061 possesses excellent strength, allowing it to withstand the internal pressure and various complex loads generated by the high-pressure oil system while significantly reducing weight, ensuring the rigidity and stability of the device. Compared to using precious metal cast tin bronze as the entire structure, the cost of aluminum alloy materials and processing is significantly reduced, achieving the goals of "saving raw materials" and "reducing costs" mentioned in the background art.

[0022] In this embodiment, the bushing 3 is made of cast tin bronze (such as ZCuSn5Pb5Zn5). The bushing 3 is pressed into the inner hole of the oil receiver body 1 with an interference fit, ensuring that the two will not move relative to each other during operation. Cast tin bronze is a traditional and excellent wear-resistant material with self-lubricating, conformable, and anti-galling properties. It forms an ideal friction pair with the rotating oil receiver shaft 2, which is the core of ensuring the long-term stable operation of the device. The inner hole of the bushing 3 is machined by high-precision reaming or honing and is ground to fit the outer circle of the oil receiver shaft 2, forming a precise radial clearance of 0.03mm to 0.05mm, replacing the original multi-seal structure. The embedded bronze bushing 3 inherits the wear-resistant advantages of the original integral bronze structure, while protecting the aluminum alloy oil receiver body 1 from wear, and solving the problem of compatibility between different materials.

[0023] In this invention, the oil receiving shaft 2, as a rotating component, primarily functions to transmit torque and drive the turbine blades to rotate. The oil receiving shaft 2 is a hollow shaft with internal oil channels for introducing or exporting high-pressure operating oil. Its precision-ground outer surface mates with the inner hole of the bronze bushing 3, forming a minute gap of 0.03mm to 0.05mm. Based on the laminar flow principle of fluid dynamics, when high-pressure oil enters this minute gap, it generates fluid resistance, effectively preventing large-scale oil leakage and achieving dynamic sealing. This replaces the traditional contact seal using multiple sealing rings (such as O-rings and Glyd rings).

[0024] This gap allows a very small amount of oil to pass through, forming a thin oil film within the gap. This film provides continuous lubrication to the friction pair (oil-receiving shaft 2 and bushing 3) and carries away the heat generated by friction, achieving excellent heat dissipation and low temperature rise. Because it is non-contact, it completely eliminates the dry friction or boundary friction between the traditional sealing strip and the rotating shaft, not only reducing operating torque but also fundamentally avoiding wear and excessive temperature rise caused by friction.

[0025] Assembly and working process:

[0026] First, the precision-machined cast tin bronze bushing 3 is pressed into the inner hole of the aerospace aluminum alloy oil receiver body 1. Then, the oil receiving shaft 2 is inserted into the bushing 3. During unit operation, the oil receiving shaft 2 rotates at high speed. High-pressure oil enters the oil receiver device. The vast majority of the high-pressure oil is confined outside the fluid resistance zone formed by a tiny gap of 0.03-0.05 mm; only a small amount of oil seeps out through the gap, forming a lubricating and cooling oil film. Because friction seals are eliminated, the main heat source comes only from the viscous shear of the oil, resulting in a very low temperature rise and ensuring the long-term stability of the unit.

[0027] This utility model features a simple structure and convenient processing. It eliminates the need for complex sealing grooves, requiring only the precision of the inner hole of the bushing 3 and the outer diameter of the shaft, as well as the fit clearance. This significantly reduces processing difficulty and time. The non-contact sealing fundamentally solves the problem of frictional heat generation, resulting in more stable operation and a longer lifespan. The application of aerospace-grade aluminum alloy in the main body significantly reduces the weight of the equipment, lowers the cost of sealing components, and reduces processing time and difficulty, bringing significant economic benefits to the enterprise.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-pressure oil receiver device with a gap-type sealing structure, comprising: The oil receiver body (1) and the oil receiving shaft (2) are characterized in that the oil receiving shaft (2) is installed inside the oil receiver body (1), a bushing (3) is provided on the outer sleeve of the oil receiving shaft (2), and a gap of 0.03 mm to 0.05 mm is provided between the oil receiving shaft (2) and the bushing (3).

2. The high-pressure oil receiver device with a gap-type sealing structure according to claim 1, characterized in that: The material of the oil receiver body (1) is aviation aluminum alloy 6061.

3. In the high-pressure oil receiver device with an intermittent sealing structure according to claim 1, the bushing (3) is made of cast tin bronze.

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