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CN-224229394-U - Servo valve link mechanism of axial-flow fan with adjustable movable blades

CN224229394UCN 224229394 UCN224229394 UCN 224229394UCN-224229394-U

Abstract

The application relates to a movable vane adjustable axial flow fan servo valve link mechanism which comprises a servo valve assembly, a first shaft sleeve assembly, a link assembly and a second shaft sleeve assembly, wherein the servo valve assembly comprises a first shifting fork, the first shaft sleeve assembly comprises a first rotating shaft and a first shaft sleeve, the first rotating shaft is arranged in the first shifting fork, the first shaft sleeve is sleeved on the circumferential outer side of the first rotating shaft, the first end of the link assembly is rotatably sleeved on the circumferential outer side of the first shaft sleeve, the second shaft sleeve assembly comprises a second rotating shaft and a second shaft sleeve, the second rotating shaft is connected with the servo valve, the second shaft sleeve is sleeved on the circumferential outer side of the second rotating shaft, and the second end of the link assembly is rotatably sleeved on the circumferential outer side of the second shaft sleeve. The technical scheme of the application effectively solves the problem that the link mechanism of the fan in the prior art is often damaged.

Inventors

  • CUI SHENG
  • LI YONGTAO
  • LIU QINGBO
  • YANG YOUWEN
  • YUAN BINWEN
  • LIANG NANA
  • LIU JUN
  • GE ZHIGANG

Assignees

  • 国能重庆万州电力有限责任公司

Dates

Publication Date
20260512
Application Date
20250620

Claims (10)

  1. 1. A movable vane adjustable axial flow fan servo valve link mechanism, comprising: -a servo valve assembly (10), the servo valve assembly (10) comprising a first fork; The first shaft sleeve assembly (20), the first shaft sleeve assembly (20) comprises a first rotating shaft (21) and a first shaft sleeve (22), the first rotating shaft (21) is installed in the first shifting fork, and the first shaft sleeve (22) is sleeved on the outer side of the first rotating shaft (21) in the circumferential direction; A connecting rod assembly (30), wherein a first end of the connecting rod assembly (30) is rotatably sleeved on the circumferential outer side of the first shaft sleeve (22); the second sleeve assembly (40), the second sleeve assembly (40) includes second pivot (41) and second sleeve (42), second pivot (41) link to each other with the servo valve, second sleeve (42) cover is established the circumference outside of second pivot (41), the second end rotationally cover of link assembly (30) is established the circumference outside of second sleeve (42).
  2. 2. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 1, characterized in that the first shaft sleeve (22) has a first limit portion (221) and a second limit portion (222), the first limit portion (221) and the second limit portion (222) being located on both sides of the first end of the link assembly (30), respectively.
  3. 3. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 2, characterized in that the first shaft sleeve (22) comprises a first shaft sleeve main body, the first limiting portion (221) and the second limiting portion (222) are convex rings protruding out of the outer wall of the first shaft sleeve main body, and the distance between the first limiting portion (221) and the second limiting portion (222) is equal to the thickness of the first end of the link assembly (30).
  4. 4. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 2, characterized in that the first shaft sleeve (22) comprises a first sub-shaft sleeve section (223) and a second sub-shaft sleeve section (224), the first limiting part (221) is located in the first sub-shaft sleeve section (223), and the second limiting part (222) is located in the second sub-shaft sleeve section (224).
  5. 5. The movable vane-adjustable axial flow fan servo valve link mechanism according to any one of claims 1 to 4, characterized in that the link assembly (30) includes a link body (31), a first link shaft sleeve (32) and a bearing (33), the first link shaft sleeve (32) is detachably connected to a first end of the link body (31), the first link shaft sleeve (32) is interference fit with an outer ring of the bearing (33), and an inner ring of the bearing (33) is located circumferentially outside the first shaft sleeve (22).
  6. 6. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 5, characterized in that the first end of the link body (31) has a first internal threaded hole, and the first link shaft sleeve (32) has a first external threaded rod adapted to the first internal threaded hole.
  7. 7. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 5, characterized in that the link assembly (30) further comprises a second link shaft sleeve (34), the second link shaft sleeve (34) is detachably connected to the second end of the link main body (31), and the second link shaft sleeve (34) is sleeved on the circumferential outer side of the second link shaft sleeve.
  8. 8. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 7, characterized in that the second end of the link body (31) has a second internally threaded hole, and the second link bushing (34) has a second externally threaded rod that is fitted with the second internally threaded hole.
  9. 9. The adjustable vane axial fan servo valve linkage mechanism of claim 5, wherein the diameter of the first sleeve (22) is larger than the inner diameter of the first fork bore.
  10. 10. The movable vane-adjustable axial flow fan servo valve link mechanism according to claim 1, characterized in that the second sleeve assembly (40) further comprises a second fork, the second fork is connected with the servo valve, the second rotating shaft (41) is penetrated in the second fork, and the second sleeve is positioned between two branches of the second fork.

Description

Servo valve link mechanism of axial-flow fan with adjustable movable blades Technical Field The application relates to the technical field of linkage mechanisms, in particular to a servo valve linkage mechanism of an axial flow type ventilator with adjustable movable vanes. Background In some electric power generation devices, a movable vane adjustable axial-flow fan servo valve connecting rod spare part is needed, and the fan movable vane adjusting process is that an external actuator drives a rotating shaft and a shifting fork to rotate, and an internal connecting rod drives a servo valve to control a hydraulic cylinder to enter and return oil, so that the piston of the hydraulic cylinder is controlled to move along the axial direction, and the hydraulic cylinder drives a thrust disc and a vane assembly to move, so that the opening degree of the movable vane is adjusted. Because of reasons such as servo valve link mechanism design and vibration of moving parts, link mechanism often damages, drops, just so leads to the fan to be forced to shut down, causes the unit to fall the load operation, if the adjustment is untimely can lead to even the unit to stop by the plan, brings the hidden danger for the unit safe operation, causes bigger economic loss simultaneously. Disclosure of utility model The application provides a movable vane adjustable axial flow fan servo valve link mechanism, which solves the problem that the link mechanism of a fan in the prior art is often damaged. The servo valve link mechanism of the movable vane adjustable axial-flow fan comprises a servo valve assembly, a first shaft sleeve assembly, a link assembly and a second shaft sleeve assembly, wherein the servo valve assembly comprises a first shifting fork, the first shaft sleeve assembly comprises a first rotating shaft and a first shaft sleeve, the first rotating shaft is arranged in the first shifting fork, the first shaft sleeve is sleeved on the circumferential outer side of the first rotating shaft, the first end of the link assembly is rotatably sleeved on the circumferential outer side of the first shaft sleeve, the second shaft sleeve assembly comprises a second rotating shaft and a second shaft sleeve, the second rotating shaft is connected with the servo valve, the second shaft sleeve is sleeved on the circumferential outer side of the second rotating shaft, and the second end of the link assembly is rotatably sleeved on the circumferential outer side of the second shaft sleeve. Further, the first shaft sleeve is provided with a first limiting part and a second limiting part, and the first limiting part and the second limiting part are respectively positioned at two sides of the first end of the connecting rod assembly. Further, the first shaft sleeve comprises a first shaft sleeve main body, the first limiting part and the second limiting part are convex rings protruding out of the outer wall of the first shaft sleeve main body, and the distance between the first limiting part and the second limiting part is equal to the thickness of the first end of the connecting rod assembly. Further, the first shaft sleeve comprises a first sub-shaft sleeve section and a second sub-shaft sleeve section, the first limiting part is located on the first sub-shaft sleeve section, and the second limiting part is located on the second sub-shaft sleeve section. Further, the connecting rod assembly comprises a connecting rod main body, a first connecting rod shaft sleeve and a bearing, wherein the first connecting rod shaft sleeve is detachably connected to the first end of the connecting rod main body, the first connecting rod shaft sleeve is in interference fit with the outer ring of the bearing, and the inner ring of the bearing is located on the outer side of the circumference of the first shaft sleeve. Further, the first end of the connecting rod main body is provided with a first internal threaded hole, and the first connecting rod shaft sleeve is provided with a first external threaded rod matched with the first internal threaded hole. Further, the connecting rod assembly further comprises a second connecting rod shaft sleeve detachably connected to the second end of the connecting rod main body, and the second connecting rod shaft sleeve is sleeved on the outer side of the circumference of the second shaft sleeve. Further, the second end of the connecting rod main body is provided with a second internal threaded hole, and the second connecting rod shaft sleeve is provided with a second external threaded rod which is matched with the second internal threaded hole. Further, the diameter of the first shaft sleeve is larger than the inner diameter of the hole of the first shifting fork. Further, the second sleeve assembly further comprises a second shifting fork, the second shifting fork is connected with the servo valve, the second rotating shaft is arranged in the second shifting fork in a penetrating mode, and the second sleeve is loca