Compact type replaceable three-way assembly

Abstract

A compact type replaceable tee joint assembly comprises a tee joint, a throttling element, a spring assembly, a clamping groove and a blanking cap. The three-way pipeline comprises a main pipeline and a bypass pipeline communicated with the main pipeline; a clamping groove is formed in the inner wall of the inlet end of the three-way pipeline main pipeline and provided with a connecting structure. The throttling element is installed on the front end face of the clamping groove through a fastener. The blanking cap is mounted at the outlet end of the bypass pipeline; one end of the spring assembly is connected with the rear end face of the blanking cap, the other end of the spring assembly is connected with the front end face of the throttling element, and when the throttling element is replaced, the spring assembly is pulled through the blanking cap so that the throttling element can be taken out. The device can adapt to the complex space layout of the liquid rocket engine, the space utilization rate of the engine is increased, and the throttling element of the liquid rocket engine can be replaced under the condition that a backflow guide pipe is not detached.

Description

Technical Field

[0001] This invention relates to a compact, replaceable three-way assembly, belonging to the field of liquid rocket engine design. Background Technology

[0002] The liquid rocket engine's return duct connects the thrust chamber's body collector to the thrust chamber head collector, allowing heat-exchanged methane to enter the thrust chamber head collector through the return duct. The throttling element installed in the return duct determines the air-fuel mixture ratio during combustion, playing a crucial role in regulating engine flow.

[0003] Because the return flow duct is located between structures such as the turbopump and servo tie rod, and the thrust chamber is a rocking structure, the space available for the return flow duct is limited. Furthermore, the large diameter and length of the return flow duct make it unsuitable for installation and impossible to disassemble after installation. The flow within the return flow duct is multi-flow, involving multiple coupled calculations, resulting in low accuracy of the calculation results. Existing return flow ducts require replacement of the throttling element after each test. Therefore, a compact, replaceable tee assembly needs to be designed and welded to the return flow duct to allow for throttling element replacement without disassembling the return flow duct. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and provide a compact replaceable three-way assembly that adapts to the complex spatial layout of liquid rocket engines, thereby improving the engine space utilization rate and allowing the replacement of throttling elements in liquid rocket engines without disassembling the return duct.

[0005] The technical solution of this invention is: a compact replaceable tee assembly, comprising: Tees, throttling elements, spring assemblies, slots, plugs; The tee includes a main pipeline and a branch pipeline connected to the main pipeline; Define the end where the axis of the main pipeline and the branch pipeline forms an acute angle as the outlet end and the other end as the inlet end; define the direction pointing to the outlet end or the outlet of the branch pipeline as forward and the direction pointing to the inlet end as backward. A slot is opened on the inner wall of the entrance end of the tee main road. The slot is integrally processed with the tee and a connecting structure is set on the slot. The throttling element is installed in the slot; The plug is installed at the outlet end of the branch pipe; One end of the spring assembly is connected to the rear end of the plug, and the other end is connected to the front end of the throttling element. When replacing the throttling element, the spring assembly is pulled by the plug to remove the throttling element.

[0006] Preferably, the throttling element is annular with through holes evenly distributed circumferentially for connection with the connecting structure on the slot; A counterweight is provided on the front end face of the throttling element to prevent the throttling element from being knocked off by the force generated by the fluid flow. The counterweight is provided with a support lug.

[0007] Preferably, the connection structure on the slot is a stud on the front end face, which mates with the through hole of the throttling element; when the working condition involves the inverted installation of the tee assembly, after the throttling element is installed, fasteners are installed on the stud connected to the throttling element through the outlet of the bypass pipe to prevent the throttling element from falling off.

[0008] Preferably, the spring assembly includes: a first connecting spring and two second connecting springs, wherein: The first connecting spring is located inside the branch pipe, and its front end is connected to the plug by a hook; its rear end is welded to the front end of the two second connecting springs; the rear ends of the two second connecting springs are equipped with hooks, which are connected to the lugs on the front end face of the throttling element.

[0009] Preferably, the diameter of the steel wire of the first connecting spring is 7mm~10mm, and the outer diameter is designed to match the inner diameter of the side branch pipe; The diameter of the steel wire of the second connecting spring is 3mm~5mm, and the outer diameter is 8mm~14mm.

[0010] Preferably, the angle between the axis of the main pipeline and the branch pipeline is 35° to 65°.

[0011] Preferably, the main pipeline is directly connected to the return pipeline; the diameter of the branch pipeline is not greater than the diameter of the main pipeline, and the inner diameter of the branch pipeline is greater than the outer diameter of the throttling element.

[0012] Compared with the prior art, the present invention has the following advantages: It enables the replacement of throttle elements without disassembling the return duct; the displacement and angular deformation between the engine and the turbo pump are large during the oscillation process. By connecting the three-way assembly to the return duct, the engine space utilization can be improved, and the requirement of frequent replacement of throttle elements can be met. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the tee assembly of the present invention; Figure 2 This is a cross-sectional view of the tee of the present invention; Figure 3 This is a schematic diagram of the throttling element of the present invention; Figure 4 This is a schematic diagram of the spring assembly of the present invention; Figure 5 This is a schematic diagram of the plug structure of the present invention; Figure 6This is a three-dimensional schematic diagram of the tee assembly of the present invention. Detailed Implementation

[0014] This invention proposes a compact, replaceable three-way assembly. This assembly can adapt to the complex spatial layout of liquid rocket engines, improving engine space utilization, and also allows for the replacement of throttling elements in liquid rocket engines without disassembling the return duct. Figure 1 As shown, the compact replaceable tee assembly includes: tee 1, throttling element 2, spring assembly 3, slot 4, plug 5, side support port 6, fastener 9, inlet end 7, and outlet end 8.

[0015] like Figure 2 and Figure 6 As shown, the tee pipe includes a main pipe and a branch pipe connected to the main pipe; the end where the main pipe and the branch pipe form an acute angle is defined as the outlet end 8, and the other end is the inlet end 7. Define the direction pointing to the outlet 8 or the outlet of the branch pipe as front, and the direction pointing to the inlet 7 as back; A slot 4 is provided on the inner wall of the entrance end of the three-way main road, and a connecting structure is provided on the slot 4. The throttling element 2 is mounted on the front end face of the slot 4 by fasteners; The plug 5 is installed at the outlet end of the branch pipe; One end of the spring assembly 3 is connected to the inner surface of the plug 5, and the other end is connected to the front end of the throttling element 2. It is used to pull the spring assembly through the plug when replacing the throttling element, thereby removing the throttling element. The spring assembly 3 includes a first connecting spring and two second connecting springs, each spring having hooks at both ends; the first connecting spring is located in the side branch pipe, its front end is connected to the plug 5, and its rear end is connected to the front end of the two second connecting springs; the rear ends of the two second connecting springs are both connected to the front end face of the throttling element 2.

[0016] In the aforementioned compact replaceable tee assembly: the throttling element 2 is as follows Figure 3 As shown, it has a counterweight and a threaded through hole, and the counterweight is welded with lugs; In the aforementioned compact replaceable tee assembly: the throttling element 2 is connected to the tee via a slot 4.

[0017] In the aforementioned compact replaceable tee assembly: the spring assembly 3 consists of two second connecting springs (thin springs) and a first connecting spring (thick spring) with hooks. The two thin springs and the thick spring are connected by welding. Hooks are welded to both ends of the thin springs and the thick spring. The wire diameter of the first connecting spring is 7mm~10mm, and its outer diameter is designed to match the inner diameter of the branch pipe; the wire diameter of the second connecting spring is 3mm~5mm, and its outer diameter is 8mm~14mm. In the aforementioned compact replaceable tee assembly: such as Figure 4 As shown, the spring assembly 3 plays a compensating role during the disassembly of the throttling element. The hook on the thin spring is connected to the lug on the throttling element, and the hook on the thick spring is connected to the lug on the plug. When replacing the throttling element, the spring assembly is pulled by the plug to remove the throttling element.

[0018] In the aforementioned compact replaceable tee assembly: the slot 4 is integrally formed with the tee housing, and a connecting structure is provided on the slot 4. For example... Figure 1 As shown, the slot is used to install the throttling element. A stud is provided on the front end face of the slot. When inverted installation is involved, a nut can be installed on the stud through the side support to prevent the throttling element from falling off.

[0019] In the aforementioned compact replaceable tee assembly: such as Figure 1 As shown, the plug 5 is installed on the side support port and connected to the side support port flange by fasteners. Figure 5 As shown, two hooks are welded onto the plug for mounting a thick spring.

[0020] In the above-mentioned compact replaceable tee assembly: the inlet end 7 and the outlet end 8 are the main tee pipe parts, which are directly connected to the return conduit.

[0021] In the aforementioned compact replaceable tee assembly: the angle between the side branch port 6 and the main pipe is between 35° and 65°.

[0022] In the aforementioned compact replaceable tee assembly: the diameter of the bypass pipe is equal to or smaller than the diameter of the main pipe but larger than the outer diameter of the throttling element.

[0023] In the aforementioned compact replaceable tee assembly: the spring assembly plays a compensating and buffering role during installation and disassembly.

[0024] A compact, replaceable tee assembly, the specific structure and implementation method of which are as follows: Includes a throttling element 2; a spring assembly 3; a slot 4; a plug 5; a side outlet 6; an inlet end 7; an outlet end 8; and a fastener 9.

[0025] The throttling element 2 is connected to the tee via a slot 4. When the engine is not involved in flipping / inverting, the throttling element is fixed to the tee via the slot; when the engine is involved in flipping / inverting, the throttling element can be tightened onto the tee stud with fastener 9 to prevent the throttling element from falling off; the bolt connection method allows for flexible disassembly and inspection, enhancing maintainability.

[0026] Spring assembly 3 and plug 5 are connected to hook via lugs; Throttling element 2 and spring assembly 3 are connected by lugs and hooks. When it is necessary to replace the adjustment element, remove the fasteners on the plug 5 and remove the throttling element by pulling the spring assembly from the side support port 6.

[0027] The inlet end 7 is fixedly connected to the engine return duct, and the outlet end 8 is fixedly connected to the engine return duct.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A compact replaceable tee assembly, characterized in that... include: Tee (1), throttling element (2), spring assembly (3), slot (4), plug (5); The tee includes a main pipeline and a branch pipeline connected to the main pipeline; Define the end where the axis of the main pipeline and the branch pipeline forms an acute angle as the outlet end and the other end as the inlet end; define the direction pointing to the outlet end or the outlet of the branch pipeline as forward and the direction pointing to the inlet end as backward. A slot (4) is opened on the inner wall of the entrance end of the tee main road. The slot (4) is integrally processed with the tee and a connecting structure is provided on the slot (4). The throttling element (2) is installed in the slot (4); The plug (5) is installed at the outlet end of the branch pipe; One end of the spring assembly (3) is connected to the rear end face of the plug (5), and the other end is connected to the front end face of the throttling element (2). When replacing the throttling element, the spring assembly is pulled by the plug (5) to remove the throttling element.

2. The compact replaceable tee assembly according to claim 1, characterized in that: The throttling element (2) is annular with through holes evenly distributed along the circumference, used to connect with the connection structure on the slot (4); The front end face of the throttling element (2) is provided with a counterweight to prevent the throttling element from being knocked off by the force generated by the fluid flow. The counterweight is provided with a support lug.

3. A compact replaceable tee assembly according to claim 2, characterized in that: The connection structure on the slot (4) is a stud on the front end face, which fits with the through hole of the throttling element (2). When the working condition of the three-way assembly is reversed, after the throttling element (2) is installed, fasteners are installed on the stud connected to the throttling element (2) through the side branch pipe outlet to prevent the throttling element (2) from falling off.

4. A compact replaceable tee assembly according to claim 2, characterized in that: Spring assembly (3) includes: a first connecting spring and two second connecting springs, wherein: The first connecting spring is located in the side branch pipe, and its front end is connected to the plug (5) by a hook; its rear end is welded to the front end of the two second connecting springs; the rear ends of the two second connecting springs are provided with hooks, which are connected to the lugs on the front end face of the throttling element (2).

5. A compact replaceable tee assembly according to claim 4, characterized in that: The diameter of the steel wire of the first connecting spring is 7mm~10mm, and its outer diameter is designed to match the inner diameter of the side branch pipe. The diameter of the steel wire of the second connecting spring is 3mm~5mm, and the outer diameter is 8mm~14mm.

6. A compact replaceable tee assembly according to claim 1, characterized in that: The angle between the axis of the main pipeline and the branch pipeline is 35°~65°.

7. A compact replaceable tee assembly according to claim 1, characterized in that: The main pipeline is directly connected to the return pipeline; the diameter of the branch pipeline is not greater than the diameter of the main pipeline, and the inner diameter of the branch pipeline is greater than the outer diameter of the throttling element (2).

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