Half key limiting device for guide vane rotating arm of water turbine
By designing supports and limiting bolts to fix the split key on the turbine guide vane swing arm, the problems of misalignment and floating of the split key were solved, the turbine was stabilized, and the reliability of force couple transmission and the operational stability of the unit were improved.
Patent Information
- Application Number
- CN202520072765.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-13
AI Technical Summary
During turbine operation, the split key of the guide vane swing arm may become misaligned or float due to insufficient machining precision, uneven force, vibration and impact. This can cause the force couple to fail to be transmitted, resulting in the guide vane not being able to operate and seriously affecting the operation of the unit.
Design a limiting device for the split key of a turbine guide vane swing arm. The split key is fixed by a support and limiting bolts to ensure that it does not misalign or float during operation. Adjustable limiting bolts and locking nuts are used to improve stability.
It improves the stability of the split key, ensures normal torque transmission, enhances the operational stability and reliability of the turbine, and has a simple structure, is easy to install, and has a wide range of applications.
Smart Images
Figure CN223754183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of hydraulic turbine, especially relates to a hydraulic turbine guide vane rotating arm half key limiting device. BACKGROUND
[0002] The half key of the guide vane rotating arm is used for transmitting force couple, when the force couple generated by the force transmitter acts on the control ring, it is transmitted to the guide vane rotating arm through double connecting rods, and finally transmitted to the guide vane by the half key. The installation standard of the half key of the guide vane rotating arm is that the joint of the half key is perpendicular to the shearing direction, that is, the joint surface passes through the guide vane shaft plane. During the action of the water guide mechanism, the half key may be dislocated and float up due to insufficient machining precision, uneven stress, vibration and impact. During the operation of the hydro-generator unit, when the half key is dislocated to be parallel to the shearing direction, the force couple cannot be transmitted to the guide vane, so that the guide vane cannot operate; when the half key floats up during the operation of the unit, the guide vane cannot rotate when the half key floats up to a certain amount. The above two conditions will cause the unit to stop and the guide vane to be unable to be closed, so that the unit cannot be stopped, which seriously endangers the operation of the unit. CONTENT OF THE UTILITY MODEL
[0003] In view of the above problems of the half key during the operation of the hydraulic turbine, the utility model provides a half key limiting device for the guide vane rotating arm of the hydraulic turbine, which improves the stability of the half key during the operation of the hydraulic turbine.
[0004] The utility model is realized through the following technical schemes:
[0005] A half key limiting device for the guide vane rotating arm of a hydraulic turbine, comprising a support, support bolts and limiting bolts; the half key is installed on the upper part of the guide vane rotating arm through a guide vane rotating arm end cover.
[0006] The support is cylindrical and internally hollow and is sleeved on the outside of the half key, the bottom of the support is provided with connecting ears on both sides, the connecting ears are connected with the guide vane rotating arm end cover through the support bolts, and the top of the support is provided with bolt holes for threadedly connecting the limiting bolts.
[0007] The working principle of the utility model is as follows:
[0008] After the support is sleeved on the outside of the half key, the support is fixed with the guide vane rotating arm end cover by using the support bolts to pass through the connecting ears arranged at the bottom of the support, the inside of the support is internally hollow and reserved for the half key enough operation space, then the limiting bolts are screwed into the inside of the support from the bolt holes at the top of the support, so that the limiting bolts abut against the top of the half key, thereby preventing the half key from being dislocated or floating up during operation. The distance between the limiting bolts and the top of the half key can be adjusted to facilitate adaptation to different operation scenes.
[0009] As a further improvement of the utility model, the limiting bolt is threadedly connected with a locking nut on the main body on the top of the support.
[0010] The locking nut can further fix the limiting bolt, avoiding the loosening of the limiting bolt caused by the impact of the half-split key.
[0011] Compared with the prior art, the utility model has the beneficial effects as follows:
[0012] The utility model has the advantages of simple structure, convenient installation, limiting the half-split key by the limiting bolt, ensuring the stable transmission of the half-split key, and improving the stability of the water turbine in operation. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is an installation structure diagram of the half-split key.
[0014] Figure 2 It is a local detail diagram after installing the limiting device on the half-split key.
[0015] Reference signs: 1-support, 2-support bolt, 3-limiting bolt, 4-locking nut, 5-connection lug, 6-guide vane arm end cover, 7-half-split key, 8-guide vane arm. DETAILED DESCRIPTION
[0016] The utility model will be further described below in combination with the drawings, and in the embodiment, the technical means used are conventional technical means in the field unless otherwise specified. Embodiment 1
[0017] As shown in the drawings, a half-split key limiting device for a guide vane arm of a water turbine includes a support 1, a support bolt 2 and a limiting bolt. Figure 2 The support 1 is cylindrical and hollow inside and is sleeved outside the half-split key 7, the bottom of the support 1 is provided with a connection lug 5 on both sides, the connection lug 5 is connected with the guide vane arm end cover 6 through the support bolt 2, and the top of the support 1 is provided with a bolt hole for threadedly connecting the limiting bolt 3.
[0018] The working principle of the embodiment is as follows:
[0019]
[0020] After the support 1 is sleeved outside the half key 7, the support 1 is fixed with the guide vane rotating arm end cover 6 by using the support bolt 2 to pass through the connecting lug 5 arranged at the bottom of the support 1, the inside of the support 1 is hollow to reserve enough operation space for the half key 7, then the limiting bolt 3 is screwed into the inside of the support 1 from the bolt hole at the top of the support 1, so that the limiting bolt 3 abuts against the top of the half key 7, thereby the half key 7 cannot be dislocated or floated during operation. The distance between the limiting bolt 3 and the top of the half key 7 can be adjusted, so as to conveniently adapt to different operation scenes. Embodiment 2
[0021] The embodiment is a further improvement based on the embodiment 1, and is specifically as follows:
[0022] The limiting bolt 3 is threadedly connected with the locking nut 4 on the main body at the top of the support 1.
[0023] The locking nut 4 can further fix the limiting bolt 3, so as to avoid that the half key 7 is impacted during operation to cause the limiting bolt 3 to be loosened.
[0024] The above embodiments are only exemplary embodiments of the utility model, and are not used for limiting the utility model, and the protection scope of the utility model is defined by the claims. The person skilled in the art can make various modifications or equivalent replacements to the utility model within the essence and protection scope of the utility model, and the modification or equivalent replacement should also be regarded as falling within the protection scope of the utility model.
[0025] It is particularly pointed out that the orientation or position relationship indicated by "front", "back", "left", "right", "up", "down" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.
Claims
1. A limiting device for the split-key of a turbine guide vane swing arm, characterized in that: It comprises a support (1), a support bolt (2) and a limiting bolt (3). The support (1) is cylindrical and internally hollow and is sleeved on the outside of the half key (7). The bottom of the support (1) is provided with connecting ears (5) on both sides. The connecting ears (5) are connected with the guide vane rotating arm end cover (6) through the support bolt (2). The top of the support (1) is provided with a bolt hole for threadedly connecting the limiting bolt (3).
2. The guide vane rotating arm half-split key limiting device of claim 1, wherein: The limiting bolt (3) is threadedly connected with a locking nut (4) on the main body of the top of the support (1).