High-temperature-resistant accelerator control flexible shaft
By using a combined design of PTFE lined tube, stainless steel elastic steel wire layer and high-temperature coating layer in the operating soft shaft, the problem of insufficient performance of soft shaft in the high-temperature environment in the prior art is solved, and good high-temperature resistance and weather resistance are achieved , suitable for high temperature environments of small aircraft engines.
Patent Information
- Application Number
- CN202421003726.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing operating soft shafts are insufficient in high temperature environments, especially in the high-heat zones of small aircraft engines, which are difficult to meet the temperature requirements of up to +150°C, and are compact in structure and weather resistance.
The outer tube of the PTFE inner lined tube and stainless steel elastic steel wire is used to combine the high-temperature resistant PTFE plastic-coated core to increase the wound strip layer and guide tube, reduce friction resistance, and use 304 stainless steel to make metal parts , ensure good high temperature and weather resistance.
It achieves good high-temperature resistance and weather resistance of soft shafts in high temperature environments, is suitable for harsh climatic conditions in the aviation field, and ensures product reliability and performance.
Smart Images
Figure CN222229143U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of flexible shafts, and in particular relates to a high-temperature resistant throttle control flexible shaft. Background Art
[0002] At present, the high temperature resistance of most control flexible shafts is around +100℃, and most of them are protected by adding a thermal insulation layer when passing through the high-temperature area of the engine; the thermal radiation of small aircraft engines can reach around +150℃, and the requirements for structure and layout are relatively compact. Therefore, it is imperative to develop a high-temperature resistant flexible shaft for connecting the throttle of an aircraft engine. Summary of the invention
[0003] The utility model aims to provide a high temperature resistant throttle control flexible shaft, so that it can meet the installation requirements of customers in combination with actual needs.
[0004] The utility model adopts the following technical solutions to achieve the above purpose:
[0005] A high-temperature resistant throttle control flexible shaft, the main body of the control flexible shaft consists of an outer tube and a core; the outer tube has a high-temperature resistant PTFE liner tube, the outer side of the PTFE liner tube is a stranded steel wire layer composed of stainless steel elastic wires, and a winding steel strip layer is arranged on the stranded steel wire layer; the winding steel strip layers are arranged at intervals along the length direction of the stranded steel wire layer; the core is composed of a steel wire rope and a high-temperature resistant PTFE plastic coating layer, and the PTFE plastic coating layer constitutes the outer layer of the core; the two ends of the control flexible shaft are respectively connected to the engine end and the operating end; the engine end is connected to the core through a pull rod, and a guide tube I is arranged on the outer side of the pull rod; a high-temperature resistant PTFE liner is arranged between the guide tube I and the pull rod.
[0006] The operating flexible shaft has a guide swing angle which is not less than 8° of the circumference.
[0007] The operating flexible shaft is connected with the operating end through a sealing member and a guide tube II.
[0008] The utility model provides a high temperature resistant throttle control flexible shaft, which has good high temperature resistance and good weather resistance through the structural design of the flexible shaft outer tube and the core, that is, the structural design of the PTFE coating layer and the PTFE inner lining tube. The product can be used in the aviation field. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 , Figure 2 It is a structural schematic diagram of the utility model.
[0010] Figure 3 It is a structural schematic diagram of the outer tube in the utility model.
[0011] In the figure: 1. end attachment, 2. nut Ⅰ, 3. pull rod, 4. guide tube Ⅰ, 5. PTFE lining, 6. connecting cap, 7. double-stacked self-locking anti-loosening washer, 8. nut Ⅱ, 9. threaded joint, 10. outer tube, 10-1. PTFE lined tube, 10-2. twisted steel wire layer, 10-3. winding strip steel layer, 11. core, 11-1. steel wire rope, 11-2. PTFE plastic coating layer 12. seal Ⅰ1, 13. seal Ⅱ, 14. guide tube. DETAILED DESCRIPTION
[0012] The utility model is described in detail with reference to the accompanying drawings and specific embodiments:
[0013] like Figure 1 , Figure 2 As shown, a high temperature resistant throttle control flexible shaft, the main body of the control flexible shaft is composed of an outer tube 10 and a core 11; Figure 3 The outer tube 10 has a high temperature resistant PTFE liner tube 10-1, the outer side of the PTFE liner tube 10-1 is a stranded steel wire layer 10-2 composed of stainless steel elastic wire, and a winding steel layer 10-3 is arranged on the stranded steel wire layer 10-2; the winding steel layer 10-3 is arranged at intervals along the length direction of the stranded steel wire layer 10-2; wherein the PTFE liner tube has good high temperature resistance and aging resistance, excellent self-lubricating performance, the stranded steel wire layer is stainless steel elastic steel wire, and the winding steel belt layer is stainless steel belt, which has good corrosion resistance and weather resistance; the size of the outer tube is selected according to the diameter of the core used; the core 11 has a steel wire rope 11-1 and a resistant The core 10 is composed of a high-temperature PTFE coating layer 11-2, and the PTFE coating layer 11-2 constitutes the outer layer of the core; the steel wire rope is wound with stainless steel elastic steel wire, the structure is 1×19, and has good corrosion resistance; the outer coating layer is PTFE, which is consistent with the material of the inner lining tube of the outer tube and has good high temperature resistance; the two ends of the operating flexible shaft are respectively connected to the engine end and the operating end; the engine end is connected to the core 10 through a pull rod 3, and a guide tube Ⅰ4 is arranged on the outside of the pull rod 3; a high-temperature resistant PTFE liner 5 is arranged between the guide tube Ⅰ4 and the pull rod 3 to reduce the friction resistance between the pull rod and the guide tube and the abnormal sound generated by the relative movement between the metals. The guide tube Ⅰ4 and the PTFE liner 5 and the connecting cap 6 are assembled together by stamping; the connecting cap 6 is assembled with the threaded joint 9 by thread; the double-stacked self-locking anti-loosening washers 7, 8 nuts Ⅱ8 are assembled on the threaded joint 9; the threaded joint 9 and the outer tube 10 are pressed together.
[0014] The flexible operating shaft has a guide swing angle which is not less than 8° of the circumference. At the end connected to the engine, the seal may not be assembled due to the high heat radiation temperature. The guide tube Ⅰ4 at this end is sealed by stamping, and the appearance is more beautiful.
[0015] The operating flexible shaft is connected to the operating end through a sealing member Ⅰ12, a sealing member Ⅱ13 and a guide tube Ⅱ4.
[0016] This product is used in the aviation field and needs to withstand the test of harsh climate and environment such as high temperature, humidity, salt spray, etc. In order to ensure that the product has good weather resistance, all metal parts are made of 304 stainless steel, which not only has a good appearance, but also has higher reliability.
Claims
1. A high temperature resistant throttle control flexible shaft, characterized by: The main body of the control flexible shaft is composed of an outer tube and a core; the outer tube has a high-temperature resistant PTFE inner liner tube, the outer side of the PTFE inner liner tube is a twisted steel wire layer composed of stainless steel elastic wires, and a winding steel strip layer is arranged on the twisted steel wire layer; the winding steel strip layers are arranged at intervals along the length direction of the twisted steel wire layer; the core is composed of a steel wire rope and a high-temperature resistant PTFE plastic coating layer, and the PTFE plastic coating layer constitutes the outer layer of the core; the two ends of the control flexible shaft are respectively connected to the engine end and the operating end; the engine end is connected to the core through a pull rod, and a guide tube I is arranged on the outer side of the pull rod; a high-temperature resistant PTFE lining is arranged between the guide tube I and the pull rod.
2. A high temperature resistant throttle control flexible shaft as claimed in claim 1, characterized in that: The operating flexible shaft has a guide swing angle which is not less than 8° of the circumference.
3. A high temperature resistant throttle control flexible shaft as claimed in claim 1, characterized in that: The operating flexible shaft is connected with the operating end through a sealing member and a guide tube II.