Mounting structure for main oil pump of steam turbine

Abstract

The utility model discloses a steam turbine main oil pump mounting structure, which belongs to the technical field of main oil pump mounting and comprises a bottom plate, two displacement grooves are formed in the bottom plate, two first threaded rods are rotatably connected in each displacement groove, and opposite ends of the two first threaded rods on the same side are fixedly connected. The thread directions of the two first threaded rods on the same side are opposite, the outer portion of each first threaded rod is in threaded connection with a displacement block, and a second handle is arranged at the rotating position of one end of the first threaded rod on one side. According to the main oil pump body protection device, the outer frame protection effect on the main oil pump body is naturally generated between the two top frames through the telescopic rod pieces and the elastic telescopic rods, an additional protection frame does not need to be installed manually, and the corresponding fixed connection effect between the fixing plate block and the two top frames can be achieved through abutting and clamping of the abutting blocks and the top frames; and therefore, the main oil pump body on the fixed plate block can be fixedly mounted more heavily and stably, and the possibility of mounting separation is not easy to occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of main oil pump installation, and particularly relates to an installation structure of a steam turbine main oil pump. Background Art

[0002] The function of the steam turbine main oil pump is to supply oil to each bearing of the unit, lubricate and cool the bearings, and supply stable and sufficient pressure oil to the speed regulating system and the protection device. The main oil pump is a volute-type double-suction centrifugal pump, which is installed on the steam turbine rotor in the front bearing seat, directly driven by the steam turbine main shaft, and rigidly connected to the steam turbine main shaft.

[0003] When the existing main oil pump is installed on the bottom plate, the protective frame also needs to be correspondingly installed on the bottom plate. The installation of the protective frame and the main oil pump is relatively cumbersome and labor-consuming. Moreover, the traditional installation of the main oil pump often uses screws for fixation, and the connection is prone to looseness. Therefore, an installation structure of a steam turbine main oil pump is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an installation structure of a steam turbine main oil pump to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An installation structure of a steam turbine main oil pump, including a bottom plate, two displacement grooves are opened on the bottom plate, two first threaded rods are rotatably connected in each of the two displacement grooves, the relative ends of the two first threaded rods on the same side are fixedly connected, the thread directions of the two first threaded rods on the same side are opposite, a displacement block is threadedly connected to the outside of each first threaded rod, a second handle is arranged at the rotation part of one end of one of the first threaded rods, the displacement block is slidably connected in the displacement groove, two top frames are fixedly arranged on the bottom plate through a plurality of displacement blocks, two second threaded rods are threadedly connected through the two top frames, a first handle is fixedly arranged at the top ends of the two second threaded rods, pressure blocks are rotatably arranged at the bottom ends of the two second threaded rods, a fixed plate is placed on the bottom plate, a main oil pump body is fixedly arranged on the fixed plate, the fixed plate is cross-shaped, and an elastic telescopic rod and a telescopic rod member are commonly arranged on the adjacent sides above the two top frames.

[0006] By setting the above structure, when the two second handles are rotated synchronously, the second handles will drive the first threaded rods on both sides to rotate synchronously. The first threaded rods will drive the two top frames to move relatively, and the two sides of the fixed plate can be clamped and fixed through the displacement of the two top frames. During this period, the elastic telescopic rod will perform a certain elastic expansion and contraction, which can make the clamping and fixing of the two top frames on the fixed plate more firm. When the first handle is rotated, the first handle will press the pressing block against the surface of the protruding part of the cross-shaped fixed plate through the threaded lifting rotation of the second threaded rod, enabling the fixed plate to be fixed on the bottom plate through the upper and lower fixed pressing, thus realizing the clamping and pressing fixation of the fixed plate. At the same time, an external frame protection effect on the main oil pump body is naturally generated between the two top frames through the telescopic member and the elastic telescopic rod, eliminating the need for manual installation of an additional protective frame. Moreover, through the pressing and clamping of the pressing block and the top frames, the fixed plate can achieve a corresponding fixed connection effect with the two top frames, making the fixed installation of the main oil pump body on the fixed plate more stable and firm, and reducing the possibility of installation detachment.

[0007] As a preferred embodiment, the pressing block is made of hard rubber material.

[0008] As a preferred embodiment, the length of the fixed plate exceeds the width of the top frame.

[0009] As a preferred embodiment, the height of the top frame is higher than the height of the main oil pump body.

[0010] As a preferred embodiment, the width of the fixed plate is smaller than the inner width of the top frame.

[0011] As a preferred embodiment, the pressing block is circular.

[0012] By setting the pressing block to be made of hard rubber material, the stability of the pressing block pressing on the fixed plate can be achieved, and through the displacement of the two top frames, the fixed plates with different sizes at the bottom of different main oil pump bodies can be fixed, which helps to improve the diversity of the installation of main oil pump bodies with different sizes.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] In this utility model, by setting up a top frame, when two second handles are rotated synchronously, the second handles will drive the first threaded rods on both sides to rotate synchronously. The first threaded rods will drive the two top frames to move relatively, and the two sides of the fixed plate can be clamped and fixed through the displacement of the two top frames. During this period, the elastic telescopic rod will perform a certain elastic expansion and contraction, so that the clamping and fixing of the two top frames on the fixed plate can be more firm. And when the first handle is rotated, the first handle will press the pressing block against the surface of the protruding part of the cross-shaped fixed plate through the threaded lifting rotation of the second threaded rod, so that the fixed plate can be fixed on the bottom plate through upper and lower fixed pressing, thus realizing the clamping and pressing fixation of the fixed plate. At the same time, a natural protective effect on the outer frame of the main oil pump body is generated between the two top frames through the telescopic member and the elastic telescopic rod, without the need to install an additional protective frame manually. And through the pressing and clamping of the pressing block and the top frame, the fixed plate can achieve a corresponding fixed connection effect with the two top frames, so that the fixed installation of the main oil pump body on the fixed plate can be more stable and firm, and the possibility of installation detachment will not occur easily.

[0015] In this utility model, by setting the pressing block to be made of hard rubber, the stability of the pressing of the pressing block on the fixed plate can be realized, and through the displacement of the two top frames, the fixed plates with different sizes at the bottom of different main oil pump bodies can be fixed, which helps to improve the diversity of the installation of main oil pump bodies with different sizes. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of this utility model;

[0017] Figure 2 is a schematic diagram of the three-dimensional structure of the fixed plate of this utility model;

[0018] Figure 3 is a schematic diagram of the side three-dimensional structure of the telescopic member of this utility model.

[0019] In the figure: 1, bottom plate; 2, displacement groove; 3, first threaded rod; 4, displacement block; 5, second handle; 6, top frame; 7, second threaded rod; 8, first handle; 9, pressing block; 10, fixed plate; 11, telescopic member; 12, main oil pump body; 13, elastic telescopic rod. Detailed Embodiment

[0020] The following further describes this utility model in conjunction with embodiments.

[0021] The following embodiments are used to illustrate this utility model, but cannot be used to limit the protection scope of this utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement to the method of this utility model under the premise of the concept of this utility model belongs to the scope required to be protected by this utility model.

[0022] Please refer to Figures 1 - 3 , the present utility model provides an installation structure for a steam turbine main oil pump, including a bottom plate 1. Two displacement grooves 2 are opened on the bottom plate 1. Two first threaded rods 3 are rotatably connected in each of the two displacement grooves 2. The opposite ends of the two first threaded rods 3 on the same side are fixedly connected, and the thread directions of the two first threaded rods 3 on the same side are opposite. A displacement block 4 is threadedly connected to the outside of each first threaded rod 3. A second handle 5 is provided at the rotation point of one end of one side of the first threaded rod 3. The displacement block 4 is slidably connected in the displacement groove 2. Two top frames 6 are fixedly arranged on the bottom plate 1 through a plurality of displacement blocks 4. Two second threaded rods 7 are threadedly connected through the two top frames 6. A first handle 8 is fixedly arranged at the top ends of the two second threaded rods 7. A pressing block 9 is rotatably arranged at the bottom ends of the two second threaded rods 7. A fixed plate 10 is placed on the bottom plate 1. A main oil pump body 12 is fixedly arranged on the fixed plate 10. The fixed plate 10 is cross-shaped. A elastic telescopic rod 13 and a telescopic rod member 11 are jointly arranged on the adjacent sides above the two top frames 6. By setting the above structure, when the two second handles 5 are rotated synchronously, the second handles 5 will synchronously drive the first threaded rods 3 on both sides to rotate. The first threaded rods 3 will drive the two top frames 6 to displace relatively, and can clamp and fix the two sides of the fixed plate 10 through the displacement of the two top frames 6. During this period, the elastic telescopic rod 13 will perform a certain elastic telescopic movement, so as to make the clamping and fixing of the two top frames 6 on the fixed plate 10 more firm. And when the first handle 8 is rotated, the first handle 8 will press the pressing block 9 against the surface of the protruding part of the cross-shaped fixed plate 10 through the threaded lifting rotation of the second threaded rod 7, so that the fixed plate 10 can be fixed on the bottom plate 1 by upper and lower fixed pressing, thereby realizing the clamping and pressing fixation of the fixed plate 10. At the same time, a natural protective effect on the outer frame of the main oil pump body 12 is generated between the two top frames 6 through the telescopic rod member 11 and the elastic telescopic rod 13, and there is no need to install an additional protective frame manually. And through the pressing and clamping of the pressing block 9 and the top frame 6, the fixed plate 10 can achieve a corresponding fixed connection effect with the two top frames 6, so that the fixed installation of the main oil pump body 12 on the fixed plate 10 can be more stable and firm, and it is not easy to have the possibility of installation detachment.

[0023] The pressing block 9 is made of hard rubber material.

[0024] The length of the fixed plate 10 exceeds the width of the top frame 6.

[0025] The height of the top frame 6 is higher than the height of the main oil pump body 12.

[0026] The width of the fixed plate 10 is smaller than the inner width of the top frame 6.

[0027] The pressing block 9 is circular. By setting the pressing block 9 to be made of hard rubber, the stability of the pressing of the pressing block 9 against the fixed plate 10 can be achieved. Moreover, through the displacement of the two top frames 6, the fixed plates 10 with different sizes at the bottom of different main oil pump bodies 12 can be fixed, which helps to improve the diversity of the installation of different-sized main oil pump bodies 12.

[0028] The working principle and usage process of the present utility model are as follows: First, when the two second handles 5 are rotated synchronously, the second handles 5 will synchronously drive the first threaded rods 3 on both sides to rotate. The first threaded rods 3 will drive the two top frames 6 to move relatively, and the two sides of the fixed plate 10 can be clamped and fixed through the displacement of the two top frames 6. During this period, the elastic telescopic rod 13 will perform a certain amount of elastic telescoping, which can make the clamping and fixing of the two top frames 6 on the fixed plate 10 more firm. And when the first handle 8 is rotated, the first handle 8 will press the pressing block 9 against the protruding part of the cross-shaped fixed plate 10 through the threaded lifting rotation of the second threaded rod 7, enabling the fixed plate 10 to be fixed on the bottom plate 1 through upper and lower fixed pressing, thereby realizing the clamping and pressing fixation of the fixed plate 10. At the same time, a natural protective effect on the outer frame of the main oil pump body 12 is generated between the two top frames 6 through the telescopic member 11 and the elastic telescopic rod 13, without the need for manual installation of an additional protective frame. Moreover, through the pressing and clamping of the pressing block 9 and the top frame 6, the fixed plate 10 can achieve a corresponding fixed connection effect with the two top frames 6, which makes the fixed installation of the main oil pump body 12 on the fixed plate 10 more stable and firm, and it is not easy to have the possibility of installation detachment. In addition, by setting the pressing block 9 to be made of hard rubber, the stability of the pressing of the pressing block 9 against the fixed plate 10 can be achieved. Moreover, through the displacement of the two top frames 6, the fixed plates 10 with different sizes at the bottom of different main oil pump bodies 12 can be fixed, which helps to improve the diversity of the installation of different-sized main oil pump bodies 12.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A steam turbine main oil pump mounting structure, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with two displacement grooves (2), and two first threaded rods (3) are rotatably connected in the two displacement grooves (2). The opposite ends of the two first threaded rods (3) on the same side are fixedly connected, and the thread directions of the two first threaded rods (3) on the same side are opposite. The outside of each first threaded rod (3) is threadedly connected with a displacement block (4), and a second handle (5) is provided at the rotation point of one end of the first threaded rod (3) on one side. The displacement block (4) is slidably connected in the displacement groove (2). The bottom plate (1) is fixedly provided with a plurality of displacement blocks (4). Two top frames (6) are arranged, and second threaded rods (7) are threadedly connected through the two top frames (6), first handles (8) are fixedly arranged at the top ends of the two second threaded rods (7), and pressing blocks (9) are rotatably arranged at the bottom ends of the two second threaded rods (7). A fixed plate (10) is placed on the bottom plate (1), and a main oil pump body (12) is fixedly arranged on the fixed plate (10). The fixed plate (10) is cross-shaped, and elastic telescopic rods (13) and telescopic rod members (11) are commonly arranged on the upper and adjacent sides of the two top frames (6).

2. The steam turbine main oil pump installation structure according to claim 1, characterized in that: The pressing block (9) is made of hard rubber.

3. The installation structure of the main oil pump of a steam turbine according to claim 1, characterized in that: The length of the fixed plate (10) exceeds the width of the top frame (6).

4. The main oil pump installation structure for a steam turbine according to claim 1, characterized in that: The height of the top frame (6) is higher than the height of the main oil pump body (12).

5. The installation structure of the main oil pump of a steam turbine according to claim 1, characterized in that: The width of the fixed plate (10) is smaller than the inner width of the top frame (6).

6. The installation structure of the main oil pump of a steam turbine according to claim 1, characterized in that: The pressing block (9) is circular.

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