A large wheel rim propeller guide pipe fixing tool

Abstract

The utility model relates to large -scale flange propeller guide pipe processing equipment technical field discloses a kind of fixing tool of large -scale flange propeller guide pipe, including support seat and several support units, support seat is used to limit the end surface of support guide pipe along the axial direction, support unit is used to limit support guide pipe along radial direction, each support unit includes several support parts, and several support parts are arranged along the circumference interval;Each support unit is equipped with independent drive unit, drive unit is used to drive support part to move close to or away from guide pipe, and several support units are used to support guide pipe alternately, and the contact position of several support parts and guide pipe is not overlapped. By introducing several independent support units alternately support, solve the problem that support part blocks processing area in traditional tooling, avoid frequent removal of support, displacement and secondary positioning.

Description

Technical Field

[0001] This utility model relates to the technical field of large wheel rim propeller duct processing equipment, and in particular to a fixing fixture for a large wheel rim propeller duct. Background Technology

[0002] Friction thrusters are widely used in ship propulsion, underwater vehicles, and other fields due to their high efficiency and low noise. The duct is one of its core components; for large friction thrusters, the duct is large in size and has a complex internal structure. The inner wall of the duct not only requires high-precision hydrodynamic surface machining to ensure hydrodynamic performance, but also extensive and extremely precise machining of the fixing structures connecting to key components such as the stator, rotor, and bearings (e.g., mounting ring grooves, positioning holes, positioning slots, threaded holes, bearing mounting surfaces, etc.). These machining processes place extremely high demands on dimensional accuracy, geometric tolerances, and surface quality; any minute deviation can lead to a decrease in thruster performance or operational instability.

[0003] In existing technologies, the machining of large rim propeller ducts typically requires specialized tooling fixtures for positioning and support. However, traditional tooling fixtures often obstruct the machining area of ​​the duct when supporting it, leading to frequent adjustments to the fixture position, and even multiple disassemblies and re-clampings, when machining specific areas such as hydrodynamic surfaces, mounting reference surfaces, positioning holes, or positioning grooves. This process is not only time-consuming and labor-intensive, significantly reducing machining efficiency, but also introduces new positioning errors due to repeated clamping, affecting machining accuracy and increasing production costs. The obstruction problem caused by the support components is particularly prominent during continuous or automated machining, becoming a bottleneck restricting machining efficiency and accuracy.

[0004] Therefore, there is an urgent need for a new type of catheter fixing fixture that can ensure stable support of the catheter while effectively avoiding obstruction of the processing area by the supporting components, thereby improving processing efficiency and accuracy. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a fixing fixture for a large rim propeller guide tube, thereby solving the problem of the support components affecting the processing of the guide tube.

[0006] To achieve this objective, the present invention adopts the following technical solution: A fixture for fixing a large rim propeller duct includes a support base and several support units. The support base is used to limit and support the end face of the duct along the axial direction, and the support units are used to limit and support the duct along the radial direction. Each support unit includes several support parts, which are spaced apart circumferentially. Each of the support units is provided with an independent drive unit, which is used to drive the support part to move closer to or away from the catheter. Several support units are used to alternately support the catheter, and the contact positions of several support parts and the catheter do not overlap.

[0007] Preferably, it further includes a main shaft and an annular fixing part, the annular fixing part being sleeved on the main shaft, and a plurality of the support units being respectively installed on the main shaft through the annular fixing part.

[0008] Preferably, the drive unit includes a plurality of linear drivers, the fixed end of the linear drivers is connected to the annular fixing part, the driving end of the linear drivers is connected to the support part, and the annular fixing part is detachably mounted on the spindle.

[0009] Preferably, the number of the annular fixing parts is the same as the number of the support units, the annular fixing parts are connected to the support units in a one-to-one correspondence, and the annular fixing parts are arranged close to each other along the axial direction of the main shaft.

[0010] Preferably, the output end of the linear driver is inclined close to the support base, and the driving direction of the linear driver forms an angle α with the axis of the spindle, wherein the angle α is greater than 45° and less than 90°.

[0011] Preferably, the support base has a support surface on the side near the support unit, and the axis of the main shaft is perpendicular to the support surface; The drive end of the drive unit is provided with a plurality of mounting shafts. The axis of the mounting shaft is perpendicular to the axis of the main shaft and parallel to the support surface. The support part is a support plate. The mounting shafts correspond one-to-one with the support plate. The support plate is provided with a pair of bearing seats on the side near the main shaft. The bearing seats are provided with shaft holes. The pair of bearing seats are respectively fitted onto the two ends of the mounting shaft corresponding to their respective support plates through the shaft holes. The support plate can rotate around the axis of the mounting shaft.

[0012] Preferably, the support plate is an arc-shaped plate, which protrudes to the side away from the main shaft.

[0013] Preferably, the outer side of the support portion is provided with a buffer adhesive layer.

[0014] Preferably, the linear actuator is a telescopic cylinder, and several telescopic cylinders of the same drive unit are connected to the same drive air source.

[0015] The technical solution provided by the utility model may include the following beneficial effects: 1. By introducing several independent support units, each equipped with an independent drive unit, the system can flexibly switch between supported and standby states. When one support unit provides stable support for the guide tube, the other support units can retract to the standby state, thus completely clearing the machining area they occupy. This alternating support method completely solves the problem of support parts obstructing the machining area in traditional tooling, avoiding frequent support removal, displacement, and secondary positioning. This greatly simplifies machining operations, significantly improves machining convenience and continuity, thereby greatly improving overall machining efficiency and effectively ensuring machining accuracy.

[0016] 2. The design of the spindle structure significantly enhances the overall rigidity and stability of the entire tooling, ensuring that the axial and radial positions of the guide tube remain highly stable when different support units are switched alternately. This avoids minor displacements that may be caused by support switching, thus providing a solid foundation for high-precision machining and further improving machining quality.

[0017] 3. The drive unit employs a linear actuator, with its fixed end connected to the annular fixing part and the drive end connected to the support part, achieving precise radial movement. The annular fixing part is detachably mounted on the spindle, allowing the linear actuator and its support part to be pre-assembled and tested as a single module before being easily installed onto the spindle. This modular design greatly simplifies the overall installation process, shortens assembly time, and also provides significant convenience for daily maintenance, repair, or component replacement, significantly reducing maintenance costs and downtime.

[0018] 4. The number of annular fixing parts is the same as the number of support units, and they are arranged closely together along the main shaft axis. This compact axial arrangement ensures that each support unit works independently while minimizing the overall axial dimensions of the tooling and optimizing space utilization. Simultaneously, this one-to-one connection method ensures that each support unit has an independent and stable fixing foundation, further improving the overall structural stability and reliability of the tooling.

[0019] 5. By designing the output end of the linear actuator to tilt towards the support base, and making the driving direction form an angle α greater than 70° and less than 90° with the spindle axis, composite support for the guide tube is achieved. This tilted design allows the linear actuator to provide radial support force while also generating an axial component force pointing towards the support base. This axial component force can effectively press and fix the guide tube tightly onto the support surface of the support base, thereby providing more stable axial limiting and support, further enhancing the overall stability of the guide tube during processing, effectively preventing axial movement, and ensuring processing accuracy.

[0020] 6. The design of the rotatable support plate allows the support plate to passively and adaptively rotate according to the actual taper of the inner wall of the catheter when it approaches the catheter. This ensures that the support plate and the inner wall of the catheter have a tight fit with the maximum area, thereby providing more uniform and stable radial support, effectively avoiding local stress concentration, protecting the inner surface of the catheter, and further improving the reliability of the support.

[0021] 7. The structure of the arc-shaped plate is highly compatible with the frustum-shaped inner wall shape commonly found inside the duct of large rim propellers. Combined with its rotatability, the arc-shaped support plate can fit as closely as possible to the inner curved surface of the duct, achieving uniform contact support in the entire circumference, maximizing the contact area, effectively dispersing support pressure, avoiding damage to the duct wall, and ensuring that the geometry of the duct does not deform during processing, providing a solid guarantee for high-precision machining. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of one embodiment of the present invention.

[0023] Figure 2 This is a structural schematic diagram of one embodiment of the present invention.

[0024] The components include: support base 1, support unit 2, support part 21, annular fixing part 22, linear actuator 3, main shaft 4, and guide tube 7. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0029] The embodiments of this utility model are described below with reference to the accompanying drawings.

[0030] A fixture for fixing a large rim propeller duct includes a support base 1 and several support units 2. The support base 1 is used to limit and support the end face of the duct 7 along the axial direction, and the support units 2 are used to limit and support the duct 7 along the radial direction. Each support unit 2 includes several support parts 21, and the several support parts 21 are arranged at intervals along the circumference. Each of the support units 2 is provided with an independent driving unit, which is used to drive the support part 21 to move closer to or away from the conduit 7. Several support units 2 are used to alternately support the conduit 7, and the contact positions of several support parts 21 and conduit 7 do not overlap.

[0031] The support unit 2 has a support state and a standby state. When the support unit 2 is in the support state, the support part 21 abuts against the inner wall of the conduit 7. When the support unit 2 is in the standby state, the support part 21 is away from the conduit 7.

[0032] When conventional support equipment is used to process the conduit 7, the support components block the position to be processed, so it is necessary to release the support of the conduit 7 to relocate it, and then reposition it. The process is cumbersome and inconvenient.

[0033] like Figure 1 and Figure 2 As shown, by introducing several independent support units 2, each equipped with an independent drive unit, it can flexibly switch between a support state and a standby state. When one support unit 2 provides stable support for the guide tube 7, the other support units 2 can retract to the standby state, thereby completely clearing the processing area where they are located. This alternating support method completely solves the problem of the support part 21 blocking the processing area in traditional tooling, avoids frequent support removal, displacement, and secondary positioning, greatly simplifies the processing operation steps, significantly improves the convenience and continuity of processing, thereby greatly improving the overall processing efficiency and effectively ensuring processing accuracy.

[0034] In one embodiment, a support portion 21 is disposed on the outside of the conduit 7, and a plurality of support portions 21 clamp and fix the conduit 7 from the outside.

[0035] Preferably, it further includes a main shaft 4 and an annular fixing part 22, the annular fixing part 22 being sleeved on the main shaft 4, and a plurality of the support units 2 being respectively installed on the main shaft 4 through the annular fixing part 22.

[0036] In another embodiment, several support portions 21 are fixed by the main shaft 4 and disposed inside the conduit 7 to support and fix the conduit 7 from the inside.

[0037] This structural design significantly enhances the overall rigidity and stability of the entire tooling, ensuring that the axial and radial positions of the guide tube 7 remain highly stable when different support units 2 are alternately switched, avoiding minor displacements that may be caused by support switching, thus providing a solid foundation for high-precision machining and further improving machining quality.

[0038] Preferably, the drive unit includes a plurality of linear drivers 3, the fixed end of the linear driver 3 is connected to the annular fixing part 22, the drive end of the linear driver 3 is connected to the support part 21, and the annular fixing part 22 is detachably installed on the spindle 4.

[0039] The drive unit employs a linear actuator 3, with its fixed end connected to an annular fixing part 22 and its driving end connected to a support part 21, achieving precise radial movement. The annular fixing part 22 is detachably mounted on the spindle 4, allowing the linear actuator 3 and its support part 21 to be pre-assembled and tested as a single module before being easily installed onto the spindle 4. This modular design greatly simplifies the overall installation process, shortens assembly time, and provides significant convenience for daily maintenance, repair, or component replacement, significantly reducing maintenance costs and downtime.

[0040] Specifically, the annular fixing part is provided with a positioning groove along its axial direction and a threaded through hole along its radial direction. The main shaft is provided with a positioning block that matches the positioning groove. The annular fixing part is positioned and installed on the main shaft through the positioning groove and the positioning block, and is locked and fixed by a positioning bolt passing through the threaded through hole.

[0041] In one embodiment, the annular fixing part 22 is provided, and a plurality of supporting units are all connected to the same annular fixing part 22.

[0042] Preferably, the number of the annular fixing parts 22 is the same as the number of the support units 2, and the annular fixing parts 22 are connected to the support units one by one. The annular fixing parts 22 are arranged close to each other along the axial direction of the main shaft 4.

[0043] In a preferred embodiment, the number of annular fixing parts 22 is the same as the number of support units 2, and they are arranged closely together along the axial direction of the main shaft 4. This compact axial arrangement ensures that each support unit 2 can work independently while minimizing the overall axial dimensions of the tooling and optimizing space utilization. At the same time, this one-to-one connection method ensures that each support unit 2 can obtain an independent and stable fixing foundation, further improving the overall structural stability and reliability of the tooling.

[0044] Preferably, the output end of the linear driver 3 is inclined close to the support base, and the driving direction of the linear driver 3 forms an angle α with the axis of the main shaft 4, wherein the angle α is greater than 45° and less than 90°.

[0045] By designing the output end of the linear actuator 3 to be tilted towards the support base 1, and making the driving direction form an angle α greater than 70° and less than 90° with the axis of the spindle 4, composite support for the guide tube 7 is achieved. This tilting design allows the linear actuator 3 to generate an axial component force pointing towards the support base 1 while providing radial support force. This axial component force can effectively press and fix the guide tube 7 tightly onto the support base 1, thereby providing more stable axial limiting and support, further enhancing the overall stability of the guide tube 7 during processing, effectively preventing axial movement, and ensuring processing accuracy.

[0046] Preferably, the support base 1 has a support surface on the side near the support unit 2, and the axis of the main shaft 4 is perpendicular to the support surface; The drive end of the drive unit is provided with a plurality of mounting shafts. The axis of the mounting shaft is perpendicular to the axis of the main shaft 4 and parallel to the support surface. The support part 21 is a support plate. The mounting shafts correspond one-to-one with the support plate. The support plate is provided with a pair of bearing seats on the side near the main shaft 4. The bearing seats are provided with shaft holes. The pair of bearing seats are respectively fitted onto the two ends of the mounting shaft corresponding to their respective support plates through the shaft holes. The support plate can rotate around the axis of the mounting shaft.

[0047] The support base 1 has a flat support surface on the side near the support unit 2, and the axis of the main shaft 4 is perpendicular to this support surface, providing a reference for the axial positioning of the conduit 7. More importantly, the drive unit has a mounting shaft perpendicular to the axis of the main shaft 4 and parallel to the support surface. The support part 21 is designed as a support plate and is connected to the drive unit through this mounting shaft, and the support plate can rotate around the mounting shaft axis. This rotatable support plate design allows the support plate to passively and adaptively rotate according to the actual taper of the inner wall of the conduit 7 when it approaches the conduit 7, ensuring that the support plate and the inner wall of the conduit 7 achieve a maximum area of ​​tight contact, thereby providing more uniform and stable radial support, effectively avoiding local stress concentration, protecting the inner surface of the conduit 7, and further improving the reliability of the support.

[0048] Preferably, the support plate is an arc-shaped plate, which protrudes to the side away from the main shaft 4.

[0049] The structure of the arc-shaped plate is highly compatible with the frustum-shaped inner wall shape commonly found inside the duct of large rim propellers. Combined with its rotatability, the arc-shaped support plate can fit as closely as possible to the inner curved surface of the duct 7, achieving uniform contact support in the entire circumference, maximizing the contact area, effectively dispersing support pressure, avoiding damage to the duct 7 wall, and ensuring that the geometry of the duct 7 does not deform during processing, providing a solid guarantee for high-precision machining.

[0050] Preferably, the outer side of the support portion 21 is provided with a buffer adhesive layer.

[0051] The buffer layer provides additional protection for the conduit 7. This buffer layer not only allows for a tighter fit to the surface of the conduit 7, filling any minor gaps and ensuring seamless support, but also effectively absorbs and buffers vibrations and impacts that may occur during processing. This significantly reduces wear and damage to the surface of the conduit 7, extends its service life, and also reduces processing noise, improving operational safety and comfort.

[0052] Preferably, the linear actuator 3 is a telescopic cylinder, and several telescopic cylinders of the same drive unit are connected to the same drive air source.

[0053] By simply controlling the air source switch, the support unit 21 can be easily and quickly driven to extend and retract, switching between supported and standby states. More importantly, by precisely adjusting the air source pressure, the output support force of the telescopic cylinder can be flexibly controlled. This allows the tooling to adapt to conduits 7 of different materials, wall thicknesses, and weights, avoiding deformation of the conduit 7 due to excessive support force or displacement of the conduit 7 during processing due to insufficient support force, thus ensuring processing stability and accuracy, and exhibiting extremely high adaptability and ease of operation.

[0054] Specifically, it also includes a control module, which connects to the air source switch, pressure regulating valve, and air pressure sensor (used to monitor the input and output air pressure) within the drive unit via electrical signals. This control module is a programmable logic controller (PLC) capable of monitoring and adjusting the air source pressure in real time according to preset programs and operator instructions. The control module is powered by an external power supply, using an industrial-standard 24V DC power supply to ensure stable and reliable operation.

[0055] Other configurations and operations according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0056] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixture for fixing a large rim-driven propeller duct, characterized in that: It includes a support base and several support units. The support base is used to limit and support the end face of the conduit along the axial direction, and the support units are used to limit and support the conduit along the radial direction. Each support unit includes several support parts, and the several support parts are arranged at intervals along the circumferential direction. Each of the support units is provided with an independent drive unit, which is used to drive the support part to move closer to or away from the catheter. Several support units are used to alternately support the catheter, and the contact positions of several support parts and the catheter do not overlap.

2. The fixing fixture for a large rim propeller guide tube according to claim 1, characterized in that: It also includes a main shaft and an annular fixing part, the annular fixing part being sleeved on the main shaft, and several of the support units being respectively installed on the main shaft through the annular fixing part.

3. The fixing fixture for a large rim propeller duct according to claim 2, characterized in that: The drive unit includes several linear drivers, the fixed end of the linear drivers is connected to the annular fixing part, the driving end of the linear drivers is connected to the support part, and the annular fixing part is detachably installed on the spindle.

4. The fixing fixture for a large rim propeller duct according to claim 2, characterized in that: The number of annular fixing parts is the same as the number of supporting units. The annular fixing parts are connected to the supporting units in a one-to-one correspondence. Several annular fixing parts are arranged close to each other along the axial direction of the main shaft.

5. The fixing fixture for a large rim propeller duct according to claim 3, characterized in that: The output end of the linear driver is inclined near the support base, and the driving direction of the linear driver forms an angle α with the axis of the spindle, wherein the angle α is greater than 45° and less than 90°.

6. The fixing fixture for a large rim propeller duct according to claim 2, characterized in that: The support base has a support surface on the side near the support unit, and the axis of the main shaft is perpendicular to the support surface; The drive end of the drive unit is provided with a plurality of mounting shafts. The axis of the mounting shaft is perpendicular to the axis of the main shaft and parallel to the support surface. The support part is a support plate. The mounting shafts correspond one-to-one with the support plate. The support plate is provided with a pair of bearing seats on the side near the main shaft. The bearing seats are provided with shaft holes. The pair of bearing seats are respectively fitted onto the two ends of the mounting shaft corresponding to their respective support plates through the shaft holes. The support plate can rotate around the axis of the mounting shaft.

7. The fixing fixture for a large rim propeller duct according to claim 6, characterized in that: The support plate is an arc-shaped plate, which protrudes to the side away from the main shaft.

8. The fixing fixture for a large rim propeller duct according to claim 1, characterized in that: The outer side of the support is provided with a buffer adhesive layer.

9. The fixing fixture for a large rim propeller guide tube according to claim 5, characterized in that: The linear actuator is a telescopic cylinder, and several telescopic cylinders of the same drive unit are connected to the same drive air source.

Images