Novel phase modifier end cover structure

Abstract

The utility model discloses a novel phase modifier end cover structure, and relates to the technical field of phase modifier end covers, the end cover structure is provided with a bearing matched with the end cover structure, the end cover structure comprises a large end cover and a small end cover, and the large end cover is provided with an upper semicircular hole and a lower semicircular hole; an L-shaped groove I is formed in the outer side edge of a lower semicircular hole of the large end cover, an L-shaped groove II is formed in the edge part, matched with the edge of the lower semicircular hole, of the bearing, and when the bearing is assembled on the large end cover, the L-shaped groove I and the L-shaped groove II are embedded with each other, and the large end cover and the bearing are combined together through a combining bolt; the upper half part of the bearing and the small end cover are mounted in the upper semicircular hole; a plurality of rib plates are arranged on the large end cover and the small end cover in the radial direction. The utility model aims to provide a novel end cover structure of a phase modifier, which can improve the rigidity and the stability of an end cover and shorten the maintenance period.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous condensers, and more specifically, to a novel end cover structure of a synchronous condenser. Background Art

[0002] For synchronous condensers with end cover bearings, the bearing end covers generally adopt an upper and lower split structure, which requires high machining accuracy for the joint surface of the upper and lower end covers. A large number of fastening connections are used between the upper and lower end covers. In many cases during on-site maintenance, the entire end cover needs to be removed, resulting in a large amount of operation work, a long cycle, and high costs.

[0003] There is no good technical solution in China for the novel end cover structure applicable to large synchronous condensers. Summary of the Utility Model

[0004] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide a novel end cover structure of a synchronous condenser that is not split, which can improve the stiffness and stability of the end cover and shorten the maintenance cycle.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A novel end cover structure of a synchronous condenser, the end cover structure is matched with a bearing, the end cover structure includes a large end cover and a small end cover, the large end cover is provided with an upper semi-circular hole and a lower semi-circular hole; an L-shaped groove I is machined inside the lower semi-circular hole of the large end cover, and an L-shaped groove II is provided on the part of the lower half of the bearing that is matched with the inside of the lower semi-circular hole. When the bearing is assembled onto the large end cover, the L-shaped groove I and the L-shaped groove II are mutually engaged, and the bearing and the large end cover are bolted together through stud bolts; the outer circle of the small end cover is installed on the upper semi-circular hole, and the inner circle of the small end cover is installed on the upper half of the bearing; a plurality of rib plates are radially arranged on the large end cover and the small end cover.

[0007] Preferably, a rubber pad is arranged in the middle of the mating surface between the L-shaped groove I and the L-shaped groove II.

[0008] Preferably, at least 5 groups of rib plates are arranged on the large end cover, and 6 groups of rib plates are arranged on the small end cover.

[0009] Preferably, lifting holes are arranged on the side of the rib plate.

[0010] Preferably, the height of the rib plate is at least 60 mm.

[0011] Preferably, the large end cover is made of steel plate with a thickness of at least 50 mm.

[0012] Preferably, a plurality of mounting holes and pin holes are arranged at the outer circle of the large end cover.

[0013] Preferably, a plurality of holes are arranged at the lower inner circle.

[0014] Preferably, the large end cover is connected to the synchronous condenser stator by M30 bolts.

[0015] Preferably, the lower semi-circular hole is connected to the lower part of the bearing by M36 bolts.

[0016] Advantages of the present utility model:

[0017] 1. Compared with the prior art, the synchronous condenser has a large output, and the vibration force received by the end cover is strong. The large end cover is designed as a whole with thick steel plates and is no longer split in half, improving the stiffness of the end cover. The inner lower semi-circular edge of the large end cover and the lower edge of the bearing are both precision machined with L-shaped grooves to mutually fit and support the bearing. The clamping bolts effectively fix the bearing. During maintenance, in most cases, only the upper small end cover with a relatively light mass needs to be removed, and the operation requirements are relatively simple, and the maintenance period can be shortened.

[0018] 2. In the present utility model, rib plates are radially arranged on the large end cover and the small end cover, further improving the stiffness of the large end cover and the small end cover and reducing the vibration values of the bearing and the rotating shaft.

[0019] 3. In the present utility model, the bearing end cover structure of the synchronous condenser is relatively large in volume and weight, and a hoist is often required for auxiliary assembly during loading and unloading. A number of lifting holes are arranged on the rib plates radially arranged on the large end cover and the small end cover, which are convenient for locking with the hoist during assembly. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the mating part of the large end cover and the bearing of the present utility model;

[0022] Reference Signs:

[0023] 1. Large end cover; 2. Small end cover; 3. Bearing; 4. Rib plate; 5. Lifting hole; 6. Rubber pad. Detailed Embodiments

[0024] The concept, specific structure and technical effects generated by the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. The following embodiments are described for a 10 MVar synchronous condenser. Embodiment

[0025] As Figure 1 and Figure 2As shown in the figure, a new type of synchronous condenser end cover structure provided by the present application is designed to cooperate with a corresponding bearing 3. The end cover structure includes a large end cover 1 and a small end cover 2. The large end cover 1 is provided with a through large upper semi-circular hole and a small lower semi-circular hole. An L-shaped groove Ⅰ is machined on the inner edge of the lower semi-circular hole. An L-shaped groove Ⅱ is also provided at the inner side of the lower semi-circular hole of the large end cover 1 where the bearing 3 is fitted. When the bearing 3 is assembled onto the large end cover 1, the L-shaped grooves are fitted with each other, and the large end cover 1 and the bearing 3 are fixed together by bolts. For a 10 MVar synchronous condenser, the radial length of the contact surface between the L-shaped grooves is not less than 40 mm. This fit can ensure the bearing 3's resistance to axial and radial vibrations and improve the stability of the end cover. A rubber pad 6 is provided at the fit to play a role in sealing and enhancing the buffer between the large end cover 1 and the bearing 3, preventing rigid collision between the two and accelerating component damage. The outer circle of the small end cover is installed in the upper semi-circular hole, and the upper half of the bearing is installed in the inner circular hole of the small end cover. The small end cover 2 is lighter in weight and is connected to the upper part of the large end cover 1 and the bearing 3 by fasteners. The large end cover 1 is made of steel plate. When applicable to a 10 MVar synchronous condenser, its thickness is at least 50 mm. The large end cover 1 is integrally designed without splitting in half, improving the overall stiffness of the end cover. During maintenance, in most cases, only the lighter small end cover 2 on the upper part needs to be removed, and the operation requirements are relatively simple, and the maintenance period can be shortened.

[0026] As an implementation manner of this embodiment, a number of rib plates 4 are radially arranged on the large end cover 1 and the small end cover 2. There are at least 5 groups of rib plates 4 on the large end cover 1, and at least 6 groups of rib plates 4 on the small end cover 2. When applicable to a 10 MVar synchronous condenser, the height of the rib plates 4 is at least 60 mm. The rib plates 4 further improve the stiffness of the large end cover 1 and the small end cover 2 and reduce the vibration values of the bearing 3 and the rotating shaft.

[0027] As an implementation manner of this embodiment, a lifting hole 5 is provided on the side of the rib plate 4. The bearing end cover of the synchronous condenser is large in volume and weight, and a crane is used for assistance during loading and unloading. The provision of the lifting hole 5 ensures the lifting quality, facilitates assembly, saves time and effort, and has high efficiency. During assembly, it is positioned in cooperation with the pin holes provided on the large end cover 1 and the small end cover 2 to achieve efficient loading and unloading.

[0028] As an implementation manner of this embodiment, a number of mounting holes and pin holes are provided around the outer circle of the large end cover 1. The large end cover 1 is connected to the synchronous condenser stator through M30 bolts passing through the mounting holes. The number of mounting holes is generally 24 - 48. When the present application is applicable to a 10 MVar synchronous condenser, the number of M30 bolts is 36.

[0029] As an implementation manner of this embodiment, a number of mounting holes are provided around the outer circle of the lower semi-circular hole. The lower semi-circular hole is connected to the lower part of the bearing 3 by passing M36 bolts through the mounting holes. When this application is applicable to a 10 MVar synchronous condenser, the number of M36 bolts is 7.

[0030] The above has specifically described the implementation manners of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can also make various equivalent modifications or substitutions without departing from the spirit of the present utility model. These equivalents or substitutions are all included within the scope defined by the claims of the present utility model.

Claims

1. A novel phase condenser end cover structure, the end cover structure is matched with a bearing (3), and is characterized in that: The end cover structure comprises a large end cover (1) and a small end cover (2), wherein the large end cover (1) is provided with an upper semicircular hole and a lower semicircular hole; an L-shaped groove I is processed on the inner side of the lower semicircular hole of the large end cover (1); a portion of the bearing (3) that matches the inner side of the lower semicircular hole is provided with an L-shaped groove II; when the bearing (3) is assembled on the large end cover (1), the L-shaped groove I and the L-shaped groove II are mutually engaged, and the large end cover (1) and the bearing (3) are fastened together by fastening bolts; the outer circle of the small end cover is mounted on the upper semicircular hole, and the upper half of the bearing is mounted on the inner circle of the small end cover; and a plurality of ribs (4) are radially arranged on the large end cover (1) and the small end cover (2).

2. A novel phase modulator end cover structure as claimed in claim 1, characterized in that: A rubber pad is arranged in the middle of the matching surface between the L-shaped groove I and the L-shaped groove II.

3. A novel phase modulator end cover structure as claimed in claim 1, characterized in that: The large end cover (1) is provided with at least five groups of rib plates (4), and the small end cover (2) is provided with six groups of rib plates (4).

4. A novel phase modulator end cover structure as claimed in claim 3, characterized in that: A lifting hole (5) is provided on the side of the rib plate (4).

5. A novel phase modulator end cover structure as claimed in claim 4, characterized in that: The rib plate (4) has a height of at least 60 mm.

6. A novel phase modulator end cover structure as claimed in claim 1, characterized in that: The large end cover (1) is made of a steel plate with a thickness of at least 50 mm.

7. A novel phase modulator end cover structure as claimed in claim 1, characterized in that: A plurality of mounting holes and pin holes are provided on the outer circumference of the large end cover (1).

8. A novel phase modulator end cover structure as claimed in claim 7, characterized in that: The large end cover (1) is connected to the phase regulator stator via M30 bolts.

9. A novel phase modulator end cover structure as claimed in claim 1, characterized in that: The large end cover (1) is provided with a plurality of holes near the lower inner circle.

10. A novel phase modulator end cover structure as claimed in claim 9, characterized in that: The hole at the lower inner circle of the large end cover (1) is connected to the lower half of the bearing (3) through M36 bolts.

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