Disassembling and assembling clamp for rod head of guide vane servomotor of water-turbine generator set

Abstract

The utility model relates to the technical field of hydro-generators, and particularly discloses a hydro-generator set guide vane servomotor rod head disassembling and assembling clamp which comprises a supporting piece arranged on the outer side of a rod head in a sleeving mode and a positioning frame arranged on the outer side of the supporting piece in a sleeving mode and matched with the supporting piece in a rotating mode in the axial direction of the rod head. The positioning frame is in sliding fit with the guide vane servomotor and does linear motion close to or away from the guide vane servomotor. According to the utility model, the rod head can be effectively prevented from falling off in the dismounting and mounting process of the rod head; and the dismounting and mounting structure of the rod head is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of hydro-generators, and more specifically, to a disassembly and assembly fixture for the rod head of a guide vane servomotor of a hydro-generator unit. Background Art

[0002] The rod head of the existing guide vane servomotor of a large hydro-generator unit is connected to the piston rod of the guide vane servomotor. The rod head includes a square head and a round head, which are generally installed on the piston rod of the guide vane servomotor by threads before leaving the factory and are installed together with the servomotor during equipment installation; as the servomotor operates for a long time, its seals, fittings, etc. may all be damaged, and when maintenance is carried out, the rod head of the servomotor needs to be removed.

[0003] Due to the unique design shape and relatively heavy self-weight of the rod head, when disassembling and assembling, in order to prevent the rod head from falling, generally a method of hanging a sling with a hoist is used to hold the square head of the rod head, and an external force is applied to the round head for disassembly and assembly. Along with the screwing in or out of the rod head, it is necessary to continuously adjust the position of the hanging point to ensure that the sling is vertical and also adjust the tightness of the hoist to avoid applying too large a radial force to the rod head;

[0004] The above method is extremely inconvenient to operate and time-consuming and laborious.

[0005] Therefore, a fixture is needed to clamp the square head of the rod head to prevent it from falling and ensure that the rod head can rotate freely under the action of an external force. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a disassembly and assembly fixture for the rod head of a guide vane servomotor of a hydro-generator unit;

[0007] The solution adopted by the utility model to solve the technical problem is:

[0008] A disassembly and assembly fixture for the rod head of a guide vane servomotor of a hydro-generator unit, comprising a support member sleeved outside the rod head and a positioning frame sleeved outside the support member and rotationally matched with the support member around the axial direction of the rod head; the positioning frame is slidably matched with the guide vane servomotor and makes a linear motion of approaching or departing from the guide vane servomotor.

[0009] During disassembly, the round head of the rod head is connected to a rotary disassembly and assembly device, and driven by the rotary disassembly and assembly device, the support member that clamps the square head and is sleeved inside the positioning frame will rotate along with the rotation of the rod head and rotate inside the positioning frame; the positioning frame sleeved outside the square head will be driven to move towards the side away from the piston, cooperating with the rod head to move towards the side away from the piston; the positioning frame will always maintain the support for the support member, so that the rod head will not fall, and during the disassembly process, it is not necessary to adjust the position of the hanging point at any time;

[0010] In some possible embodiments, in order to effectively support the support member with the positioning frame and enable the support member to rotate with the positioning frame;

[0011] The positioning frame includes a positioning bracket that slidably cooperates with the guide vane servomotor, and a support bracket that is installed in the positioning bracket and cooperates with the inner side surface of the positioning bracket to form an installation cavity; the support member is installed in the positioning bracket and rotates with the support bracket.

[0012] In some possible embodiments, in order to adjust the relative position of the support members and keep the support members horizontal;

[0013] The positioning frame further includes an adjustment assembly provided on the positioning bracket and used to adjust the relative position between the inner side surface of the support bracket and the outer side surface of the support member; there are two groups of the adjustment assemblies, each including a screw rod whose one end passes through the positioning bracket and extends into the installation cavity.

[0014] In some possible embodiments, in order to effectively realize the rotational cooperation between the support bracket and the support member;

[0015] The inner side surface of the support bracket is an arc-shaped curved surface, and a rotating member that abuts against and rotates with the support member is provided on the inner side surface; the rotation axis of the rotating member is parallel to the axis of the rod head.

[0016] In some possible embodiments, there are multiple groups of the rotating members and they are evenly arranged on the inner side surface of the support bracket.

[0017] In some possible embodiments, the rotating member includes a mandrel installed on the support bracket, a bearing sleeved outside the mandrel, and a supporting wheel sleeved outside the bearing.

[0018] In some possible embodiments, the outer contour of the support member is circular, and a rectangular installation hole is provided on the inner side of the support member; the square head of the rod head is sleeved in the installation hole.

[0019] In some possible embodiments, in order to effectively limit the support bracket and prevent it from moving along the axis direction of the rod head;

[0020] A stop bar for restricting the support bracket from moving axially along the rod head is provided on the outside of the positioning bracket.

[0021] In some possible embodiments, in order to effectively realize the sliding cooperation between the positioning bracket and the piston; it further includes a sliding bearing provided on the outside of the positioning frame, and a guide rod arranged in the axis direction of the rod head and having one end connected to the guide vane servomotor; the guide rod is sleeved outside the sliding bearing and slidably cooperates with the sliding bearing.

[0022] Compared with the prior art, the beneficial effects of the present utility model:

[0023] The cooperation of the support member, positioning frame, and support frame of the present utility model effectively realizes the clamping of the club head. Compared with the prior art, during the disassembly and assembly process, it is not necessary to adjust the lifting point position of the club head. During the disassembly and assembly process, the entire device will move along with the movement of the club head, avoiding the situation of falling.

[0024] The structure of the present utility model is simple and highly practical. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the positioning frame in the present utility model;

[0027] Figure 3 is a schematic structural diagram of the support frame in the present utility model;

[0028] Figure 4 is a schematic structural diagram of the support member in the present utility model;

[0029] Wherein: 1, positioning frame; 11, positioning frame; 111, retaining bar; 112, adjusting component; 113, sliding bearing; 12, support frame; 121, arc surface; 122, rotating member; 2, support member; 21, bracket. Detailed Embodiment

[0030] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. The "first", "second" and similar words mentioned in this application do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not represent a quantity limit, but mean that there is at least one. In the implementation of this application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of this application, unless otherwise stated, the meaning of "multiple" is two or more. For example, multiple positioning columns refer to two or more positioning columns. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] The following is a detailed description of the present utility model.

[0032] AsFigures 1 - 4 as shown in

[0033] A dismounting and mounting fixture for the guide vane servomotor rod head of a water turbine generator set, comprising a support member 2 sleeved on the outer side of the rod head, and a positioning frame 1 sleeved on the outer side of the support member 2 and rotatably matched with the support member 2 around the axial direction of the rod head; the positioning frame 1 is slidably matched with the guide vane servomotor and moves linearly closer to or away from the guide vane servomotor.

[0034] When disassembling the rod head, the round head of the rod head is connected to the rotary dismounting and mounting device, and driven by the rotary dismounting and mounting device, the support member 2 which is used for clamping the square head and sleeved in the positioning frame 1 will rotate in the positioning frame 1 along with the rotation of the rod head, driving the positioning frame 11 sleeved on the outer side of the square head to move towards the side away from the piston, and cooperating with the rod head to move towards the side away from the piston; the positioning frame 1 will always maintain the support for the support member 2, so that the rod head will not fall, and during the disassembly process, it is not necessary to adjust the hoisting point position at any time;

[0035] When installing the rod head, the rotary dismounting and mounting device only needs to control the moving and rotating directions of the rod head to be opposite to those during disassembly, which will not be elaborated here;

[0036] In some possible implementation manners, in order to effectively realize the support of the positioning frame 1 for the support member 2 and enable the support member 2 to be rotatably matched with the positioning frame 1;

[0037] The positioning frame 1 includes a positioning frame 11 slidably matched with the guide vane servomotor, and a support frame 12 installed in the positioning frame 11 and cooperating with the inner side surface of the positioning frame 11 to form an installation cavity; the support member 2 is installed in the positioning frame 11 and is rotatably matched with the support frame 12, and the support member 2 is located above the support frame 12.

[0038] The positioning frame 11 is used for supporting and fixing the support frame 12. The support frame 12 is installed in the positioning frame 11 and is rotatably matched with the support member 2 around the axis direction of the rod head; the support frame 12 is sleeved on the outer side of the square head. Since the cross section of the square head is in a rectangular structure, when the square head rotates, the support member 2 will rotate synchronously; at the same time, since the square head is screwed to the piston rod, the square head will move linearly closer to or away from the piston along its axial direction. The sliding fit between the positioning frame 11 and the piston will also drive the whole device to move linearly closer to or away from the piston along the axis direction of the rod head during the dismounting and mounting process;

[0039] In some possible implementation manners, in order to adjust the relative position between the support members 2 and make the support members 2 keep horizontal;

[0040] The positioning frame 1 further includes an adjustment assembly 112 disposed on the positioning bracket 11 and used to adjust the relative position between the inner side surface of the support bracket 12 and the outer side surface of the support member 2; there are two groups of the adjustment assemblies 112, each including a screw rod with one end passing through the positioning bracket 11 and extending into the installation cavity.

[0041] When adjusting the position of the support member 2, turn the screw rod to control the change in the length of the screw rod extending into the positioning bracket 11, thereby realizing the adjustment of the position of the support bracket 12, and further enabling the inner side surface of the adjusted support bracket 12 to be in abutting fit with the outer side surface of the support member 2.

[0042] In some possible implementation manners, in order to effectively achieve the rotational cooperation between the support bracket 12 and the support member 2;

[0043] The outer contour of the support member 2 is circular, the inner side surface of the support bracket 12 is an arc-shaped curved surface 121, and a rotating member 122 that abuts against and rotates with the support member 2 is disposed on the inner side surface of the support bracket 12; the rotation axis of the rotating member 122 is parallel to the axis of the rod head;

[0044] The support member 2 is sleeved on the outside of the square head, its outer contour is circular, and it acts on the rotating member 122, so that when the rod head rotates, the support member 2 can rotate in cooperation with the support bracket 12;

[0045] After the entire device is installed in place, the support bracket 12 will be located below the square head and rotate in cooperation with the support member 2;

[0046] In some possible implementation manners, there are multiple groups of the rotating members 122 and they are evenly disposed on the inner side surface of the support bracket 12; the rotating member 122 includes a mandrel installed on the support bracket 12 of the support bracket, a bearing sleeved on the outside of the mandrel, and a supporting wheel sleeved on the outside of the bearing;

[0047] With the above settings, it will effectively ensure the rotational cooperation between the support member 2 and the support bracket 12 and reduce the friction between the two.

[0048] In some possible implementation manners, a rectangular installation hole is provided on the inner side of the support member 2; the square head of the rod head is sleeved in the installation hole and is coaxially arranged;

[0049] Through the rectangular installation hole, the support member 2 is sleeved on the outside of the square head, so that the rotation of the rod head drives the support member 2 to rotate.

[0050] In some possible implementation manners, in order to effectively limit the support bracket 12 and prevent it from moving along the axis direction of the rod head;

[0051] A stop bar 111 for restricting the support bracket 12 from moving along the axial direction of the rod head is disposed on the outside of the positioning bracket 11.

[0052] The retaining bars 111 are in two groups and are matched with the positioning frame 11 to form a limiting cavity, and the support frame 12 will be located in the limiting cavity, effectively restricting the movement of the support frame 12 along the axis direction of the rod head;

[0053] Furthermore, a plurality of groups of weight-reducing holes are provided on the support member 2, and the setting of the weight-reducing holes will effectively reduce the weight of the support member 2;

[0054] Furthermore, the support member 2 includes four groups of brackets 21 connected in sequence, and after connection, a structure with a round outer and a square inner is formed.

[0055] In some possible implementation manners, in order to effectively achieve the sliding fit between the positioning frame 11 and the piston; it further includes a sliding bearing 113 arranged outside the positioning frame 1, and a guide rod arranged along the axis direction of the rod head and connected to the guide vane servomotor at one end; the guide rod is sleeved outside the sliding bearing 113 and is in sliding fit with the sliding bearing 113.

[0056] Furthermore, there are four groups of guide rods, and there are also four groups of sliding bearings 113 and they are arranged in one-to-one correspondence; when the positioning frame 11 is square, the sliding bearings 113 will be located at the corners of the positioning frame 11;

[0057] The arrangement of the guide rod and the sliding bearing 113 not only realizes the support for the positioning frame 11, but also enables the positioning frame 11 to only move linearly closer to or away from the piston along the axis direction of the rod head, thereby realizing the guidance for the moving direction of the positioning frame 11.

[0058] Compared with the prior art that uses a gourd hanging sling to hang the square head of the rod head and applies an external force to the round head for disassembly and assembly, with the rotation of the rod head in or out, it is necessary to continuously adjust the hanging point position to ensure that the sling is vertical and also adjust the tightness of the gourd to avoid applying too large a radial force to the rod head; by using the cooperation of the present invention and the square head, during the entire disassembly and assembly process, there is no need to adjust the position, the entire device always remains perpendicular to the rod head, and it follows the movement during the disassembly and assembly process; making the disassembly and assembly of the rod head simple and reliable.

[0059] The present invention is not limited to the foregoing specific implementation manners. The present invention extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A disassembling and assembling fixture for the rod head of a guide vane servomotor of a water turbine generator set, characterized in that, It includes a support member sleeved on the outside of the rod head, and a positioning frame sleeved on the outside of the support member and rotationally matched with the support member around the axial direction of the rod head; the positioning frame is slidably matched with the guide vane servomotor and makes a linear motion of approaching or departing from the guide vane servomotor.

2. The disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 1, characterized in that, The positioning frame includes a positioning bracket slidably matched with the guide vane servomotor, and a support bracket installed in the positioning bracket and forming an installation cavity in cooperation with the inner side surface of the positioning bracket; the support member is installed in the positioning bracket and rotationally matched with the support bracket.

3. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 2, characterized in that, The positioning frame further includes an adjusting assembly provided on the positioning bracket and used for adjusting the relative position between the inner side surface of the support bracket and the outer side surface of the support member.

4. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 2, characterized in that, The inner side surface of the support bracket is an arc-shaped curved surface, and a rotating member which is abutted against and rotationally matched with the support member is provided on the inner side surface of the support bracket; the rotation axis of the rotating member is parallel to the axis of the rod head.

5. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set, characterized in that, The rotating members are multiple groups and are evenly arranged on the inner side surface of the support bracket.

6. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 4, characterized in that, The rotating member includes a mandrel installed on the support bracket, a bearing sleeved on the outside of the mandrel, and a supporting wheel sleeved on the outside of the bearing.

7. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 2, characterized in that, The outer contour of the support member is circular, and a rectangular installation hole is provided on the inner side of the support member; the square head of the rod head is sleeved in the installation hole.

8. A disassembling and assembling fixture for the guide vane servomotor rod head of a hydraulic turbine generator set according to claim 2, characterized in that, A retaining strip for restricting the axial movement of the support bracket along the rod head is provided on the outside of the positioning bracket.

9. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to any one of claims 1-8, characterized in that, It further includes a sliding bearing provided on the outside of the positioning frame, and a guide rod arranged in the axial direction of the rod head and connected with one end to the guide vane servomotor; the guide rod is sleeved on the outside of the sliding bearing and is slidably matched with the sliding bearing.

10. A disassembling and assembling fixture for the guide vane servomotor rod head of a water turbine generator set according to claim 3, characterized in that, The adjusting assembly is two groups and includes a screw rod with one end passing through the positioning bracket and extending into the installation cavity.

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