Transformation scheme for rotary support of control ring of tubular unit

Abstract

The invention relates to the technical field of hydroelectric generating sets, in particular to a transformation scheme of a rotary support of a control ring of a tubular unit. Comprising a control ring, a supporting ring, an outer guide ring, a pressing plate, a bolt, a lateral wear-resistant plate and a radial wear-resistant plate. An original rolling ball, an original raceway and an original rolling ball pressing ring are omitted, a supporting ring, a pressing plate, an abrasion-resistant plate and other components are replaced, and an original rolling bearing rotation supporting mode is transformed into a sliding bearing rotation supporting mode. The problems that an original supporting mode is serious in abrasion, large in maintenance workload and high in cost are well solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic generating units, and specifically to a transformation scheme for the swing support of the control ring of a tubular turbine unit. Background Art

[0002] For a long time, the swing support of the control ring of a tubular turbine unit has adopted a ball support method, which is essentially a rolling bearing support method. Ball grooves are opened on the outer circle side of the outer guide ring and the inner circle side of the control ring. The control ring is rotated through an operating mechanism to realize the on-off control of the water turbine.

[0003] The balls and the raceways (ball grooves) are in point contact or line contact. The balls are made of high-hardness bearing steel, and the control ring and the outer guide ring are made of ordinary steel with lower hardness, which easily causes wear of the raceways.

[0004] Due to the large diameter of the control ring of the tubular turbine (mostly in the range of 4 meters to 9 meters) and the characteristics that it must be assembled on-site at the construction site, the raceway material can only be made of ordinary steel with lower hardness, and the matching accuracy between the balls and the raceways is low, resulting in serious wear of the raceways of a large number of control rings of tubular turbines and even causing jamming of the control ring movement.

[0005] The problem of serious wear of the control ring of the tubular turbine has not been effectively solved. When the wear reaches a certain amount, the power station needs to shut down for maintenance. Generally, repair welding and grinding or machining in the factory after disassembling are adopted. After a certain period of operation, repeated maintenance is required. The maintenance time is long, the cost is high, and the power generation loss caused is even greater.

[0006] In order to solve the above problems existing in the control ring of the tubular turbine, it is necessary to invent a transformation scheme for the swing support of the control ring of the tubular turbine unit, so as to reduce the maintenance cost and power generation loss for a large number of hydropower stations with tubular turbine units, and it is worthy of popularization and application. Summary of the Invention

[0007] The present invention provides a transformation scheme for the swing support of the control ring of a tubular turbine unit, and solves the problems existing in the prior art.

[0008] To achieve the above object, the present invention is realized through the following technical solutions: A transformation scheme for the swing support of the control ring of a tubular turbine unit, the control ring swing support transformation scheme includes: 1. Cancel the balls and the ball retaining rings, replace the ball retaining rings with support rings, and utilize the connection threaded holes of the original retaining rings for the connection between the support rings and the control rings. 2. Turn off the original ball grooves on the outer circle of the outer guide ring and turn out a right-angled groove for cooperation with the support ring. 3. Uniformly arrange 16 pieces or other numbers of pressing plates around the right side plane of the outer guide ring. 4. Install 16 pieces or other numbers of lateral wear-resistant plates on the left side plane of the support ring and the left side plane of the pressing plates respectively, uniformly arranged in a circle, and install 16 pieces or other numbers of radial wear-resistant plates on the inner circle surface of the support ring, uniformly arranged in a circle.

[0009] The essence of the transformation plan for the swing bearing of the tubular unit control ring is to transform the original swing bearing with rolling bearings into a swing bearing with sliding bearings. The transformation plan retains the two largest components, the control ring and the outer guide ring, and only needs to remove the ball bearings and ball pressure rings. A right-angled groove is machined on the outer circle of the outer guide ring, and a support ring, a pressing plate, and an anti-wear plate are added. It can better solve the problems existing in the original swing bearing of the control ring, and the transformation cost is low and the transformation period is short. Brief Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. Figure 2 It is a left view of an embodiment of the present invention.

[0012] In the figure: 1. Control ring; 2. Outer guide ring; 3. Support ring; 4. Pressing plate; 5. Bolt; 6. Lateral anti-wear plate; 7. Radial anti-wear plate. Detailed Embodiment

[0013] The present invention will be further described in detail below with reference to the drawings.

[0014] As shown in Figure 1, the transformation plan for the swing bearing of the tubular unit control ring includes a control ring 1 and a support ring 3. The support ring 3 is connected to the control ring 1 by bolts. There are an outer guide ring 2, 16 pressing plates 4, and bolts 5. The pressing plates 4 are evenly distributed and fixed on the right side plane of the outer guide ring 2 by bolts 5. Lateral anti-wear plates 6 are respectively installed on the left side plane of the support ring 3 and the left side plane of the pressing plate 4, and a radial anti-wear plate 7 is installed on the inner circular surface of the support ring 3. The lateral anti-wear plates 6 and the radial anti-wear plates 7 are both 16 pieces or other quantities and are evenly arranged in a circle.

[0015] 1. The original structure is provided with ball bearings and ball pressure rings. The ball bearings and ball pressure rings are removed, and the support ring 3 is replaced at the position of the pressure ring.

[0016] 2. The ball groove on the outer circle side of the outer guide ring 2 is turned off, and a right-angled groove is turned out to adapt to the installation of the support ring 3.

[0017] 3. 16 pressing plates 4 are evenly installed in a circle on the right side plane of the outer guide ring 2.

[0018] 4. Lateral anti-wear plates 6 are respectively installed on the left side plane of the support ring 3 and the left side plane of the pressing plate 4, and a radial anti-wear plate 7 is installed on the inner circular surface of the support ring 3.

[0019] 5. When the control ring 1 and the support ring 3 rotate, a sliding bearing support method is formed through the lateral anti-wear plates and the radial anti-wear plates.

[0020] 6. Since the contact area of sliding friction is much larger than the contact area between the ball and the raceway, the wear amount is very small, and the anti-wear plate is made of a self-lubricating material with a relatively low hardness. The main wear is on the anti-wear plate itself, and it is very convenient to replace the anti-wear plate.

[0021] The above is the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. Any deformation and improvement made by those skilled in the art according to the design concept of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. The transformation scheme of the swing support of the tubular unit control ring, characterized in that , The transformation plan includes:

1. Canceling the ball and ball retaining ring, and changing to a support ring (3). The connection between the support ring (3) and the control ring (1) utilizes the connection threaded holes of the ball retaining ring.

2. Turning off the ball groove on the outer circle of the outer guide ring (2) and turning out a right-angled groove to cooperate with the support ring (3).

3. Uniformly arranging 16 or other numbers of pressing plates (4) around the right-side plane of the outer guide ring (2).

4. Installing lateral wear-resistant plates (6) on the right-side plane of the support ring (3) and the left-side plane of the pressing plate (4) respectively, arranging them uniformly in a circle, and installing radial wear-resistant plates (7) on the inner circle surface of the support ring (3), arranging them uniformly in a circle.

2. The transformation scheme of the swing support of the control ring of the tubular turbine unit according to claim 1, characterized in that The transformation plan can retain two major components, namely the control ring (1) and the outer guide ring (2).

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