CN210622966U

CN210622966U - Control ring wear-resistant device

Info

Publication number: CN210622966U
Application number: CN201921773009.0U
Authority: CN
Inventors: 王洪斌; 戴然; 张芳; 王嘉; 马增军; 吴继兵; 李伟刚
Original assignee: Harbin Electric Machinery Co Ltd
Current assignee: Harbin Electric Machinery Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-05-26
Anticipated expiration: 2029-10-22

Abstract

The utility model discloses a control ring wear resistant device. The antiwear plate device between the water turbine control ring and the top cover limits the control ring to rotate around the top cover in a small clearance range. As the operating time increases, the wear plate wears and needs to be replaced and maintained in time. The wear plate device of traditional structure changes wear plate consuming time and is loaded down with trivial details. The utility model discloses immediately, enclose at the control ring and reserve wear plate, use the wear plate of circle in the control ring to play the guide effect earlier stage. And when the abrasion gap is increased, a new control ring pressing plate is added to form new guide and is arranged between the original control ring pressing plates. When a new control ring pressing plate is installed, the control ring pressing plate can be installed quickly only by stopping the machine. The control ring of the unit can be ensured to rotate in a higher precision range all the time in the overhaul period, the service life of the whole control ring wear-resistant device is prolonged, and the availability of the unit is increased.

Description

Control ring wear-resistant device

The technical field is as follows:

the utility model relates to a mixed flow, axial flow, pumped storage hydraulic turbine control ring wear resistant device.

Background art:

in recent years, with the rapid development of new energy in China, after solar power generation and wind power generation are vigorously developed, the peak regulation and standby tasks borne by hydropower stations are more prominent, and the hydropower stations are frequently operated in a 'water-light complementation', a 'water-wind complementation' and a 'day-of-sight' mode. The unit is adjusted to an AGC mode in an adjusting mode of the water turbine, the power of the water turbine is adjusted timely, the control ring continuously rotates around the top cover in a reciprocating mode under the operation of the guide vane servomotor, the abrasion degree of a wear-resistant plate between the control ring and the top cover is increased, the radial gap between the control ring and the top cover is increased, the control ring deviates to one side, the force of the servomotor is not uniform, the servomotor is eccentric, and the water leakage of the guide vane is increased in a closed state. The gap between the control ring pressure plate and the control ring is enlarged, the control ring can lift up, the stress of a shearing pin in the guide vane operating mechanism is uneven, shearing easily occurs, and the power station is shut down by accident. The traditional control ring wear plate device is complicated to replace and maintain, needs a unit to stop and drain water, and can replace the wear plate by disassembling the control ring and the servomotor. A new construction is needed to replace the conventional wear plate construction. The new wear plate structure does not need unit drainage, only needs to be shut down, and is provided with a new wear plate pressing plate with a guiding function. The maintenance time of the unit can be greatly shortened, and the maintenance workload is greatly reduced. The service life of the whole wear-resistant device can be doubled.

The invention content is as follows:

the utility model aims at providing a reduce unit maintenance work, increase a control ring wear resistant device of the availability of unit, technical scheme is: circle and top cap complex clearance department in the control ring is equipped with first facade wear plate, founds the ring inboard at the control ring and is equipped with second facade wear plate, and first control ring clamp plate and second control ring clamp plate are fixed to bolt and nut, are equipped with horizontal wear plate below the first control ring clamp plate, and second control ring clamp plate and top cap adopt tang small clearance fit.

The working principle is as follows:

circle and top cap complex clearance department in the control ring is equipped with first facade wear-plate, is equipped with second facade wear-plate at the control ring and founds the ring inboard, and when the control ring was relative rotation around the top cap, first facade wear-plate played the guide effect. The bolt and the nut are used for fixing the first control ring pressing plate and the second control ring pressing plate, and a horizontal wear plate is arranged below the first control ring pressing plate to prevent the control ring from being lifted. When the abrasion loss of the first facade wear plate exceeds a design value, the control ring does not need to be dismounted upwards, only the second control ring pressure plate is added, and the second control ring pressure plate and the top cover are in small-seam fit by adopting a seam allowance. The second control ring pressing plate and the second vertical surface wear-resistant plate form a friction pair, so that a guiding effect is achieved, and the function of replacing the first vertical surface wear-resistant plate is achieved.

The wear plate device between the water turbine control ring and the top cover can limit the control ring to do reciprocating rotation motion around the top cover within a small clearance range. Along with the increase of operation time, the self-lubricating layer of wear-resisting board can wear and tear, and the fit clearance will increase, needs in time to change the maintenance. The wear plate device with the traditional structure is time-consuming and tedious to maintain, and the power generation benefit of a power station is influenced. The utility model discloses immediately, enclose at the control ring and reserve second facade wear plate, use the first facade wear plate of circle in the control ring to play the guide effect earlier stage. And when the abrasion gap is increased, a new second control ring pressing plate is added, the outer circle of the second control ring pressing plate and the reserved second vertical surface wear plate form a new guiding function, and the installation position is arranged between the first control ring pressing plates. The first control ring pressing plate is out of action and does not need to be dismounted. When a new second control annular pressing plate is installed, the installation can be quickly carried out only by stopping the machine.

The utility model has the advantages of it is following:

1. the control ring of the unit can be ensured to rotate within a higher precision range all the time in the overhaul period; avoids the phenomena of uneven stress of the servomotor connected with the control ring, jumping of the control ring and the like,

2. the abrasion loss of the abrasion-resistant device determines the time of the overhaul period of the unit, and the scale of replacing parts determines the overhaul grade, so that the second control ring pressing plate can be added in a small overhaul period of the power station, the replacement can be realized without waiting for the overhaul grade, and the service life of the whole control ring abrasion-resistant device is prolonged;

3. the wear plate device of traditional structure changes first wear plate and need shuts down the power station, the high pressure water of evacuation pressure steel pipe. Time consuming and tedious, and influences the power generation benefit of the power station. The utility model reduces the maintenance work of the machine set and increases the availability of the machine set;

description of the drawings:

FIG. 1 is a cross-sectional view of a first control ring press

FIG. 2 is a cross-sectional view of a second control ring press

FIG. 3 is a plan view of the first and second control ring press plates

The specific implementation mode is as follows:

as shown in fig. 1-3, a mixed flow turbine control ring wear-resistant device, a structure of double wear-resistant plates is arranged between a top cover of a water turbine and a control ring, a first vertical face wear-resistant plate 3 is arranged at a clearance between an inner circle of the control ring 1 and a top cover 2, a second vertical face wear-resistant plate 8 is arranged on the inner side of a vertical circle of the control ring 1, and when the control ring 1 rotates around the top cover 2 relatively, the first vertical face wear-resistant plate 3 plays a role in guiding. The bolt 5 and the nut 6 are used for fixing the first control ring pressing plate 4 and the second control ring pressing plate 7, and a horizontal wear plate 9 is arranged below the first control ring pressing plate 4 to prevent the control ring 1 from being lifted. When the abrasion loss of the first facade wear plate 3 exceeds the design value, the control ring 1 does not need to be dismounted upwards, only the second control ring pressing plate 7 is added, and the second control ring pressing plate 7 and the top cover 2 are in small-seam fit by adopting a seam allowance. The second control ring pressing plate 7 and the second vertical face wear-resistant plate 8 form a friction pair to play a role in guiding, the function of replacing the first vertical face wear-resistant plate 3 is replaced, and the service life is prolonged by one time.

Claims

1. A control ring wear-resistant device is characterized in that: circle and top cap (2) complex clearance department in control ring (1) is equipped with first facade wear plate (3), circle inboard at control ring (1) immediately is equipped with second facade wear plate (8), and first control ring clamp plate (4) and second control ring clamp plate (7) are fixed in bolt (5) and nut (6), are equipped with horizontal wear plate (9) below first control ring clamp plate (4), and second control ring clamp plate (7) adopt tang booth clearance fit with top cap (2).