A new type of runner blade adjustment system

Abstract

The present invention discloses a novel runner blade adjustment system, which belongs to the technical field of hydropower equipment, and aims to solve the problem of hydraulic oil leakage in the existing blade adjustment system. The system comprises a housing, a main servomotor oil cylinder is installed in the housing, the main servomotor oil cylinder is connected to a pneumatic piston cylinder, the pneumatic piston cylinder is connected to a driving hydraulic cylinder, a collector ring is installed above the driving hydraulic cylinder, an air rotary joint is installed above the collector ring, the air rotary joint is connected to a pneumatic control valve, and the pneumatic control valve is connected to an air compressor. The present invention is applicable to a runner blade adjustment system.

Description

Technical Field

[0001] The invention belongs to the technical field of hydropower generation equipment, and in particular relates to a novel runner blade adjustment system. Background Art

[0002] Water turbines and water pumps are two traditional products. Water turbines are the core equipment of hydropower generation, which converts water energy into electrical energy. Water pumps are the reverse of the former, using electric motors to drive water pumps to pump water. Medium and large axial flow water pumps are used in large-scale irrigation and large-scale water conservancy projects such as the South-to-North Water Diversion Project. They are more used in urban flood control and drainage, sewage treatment and other fields. The principle of axial flow water turbines is the same. The blades of the runner need to adjust the blade angle in time according to the changes in water level and water flow to achieve the normal operation or optimized operation of the turbine generator set or pump. In this way, the unit needs to be equipped with a dedicated blade adjustment system. At present, the country's requirements for environmental protection are becoming more and more stringent, and the requirements for the environmental protection characteristics of the blade adjustment system of water turbines and water pumps are also getting higher and higher. The traditional blade adjustment system is prone to water pollution because the hydraulic rotary joint inevitably leaks oil in the working state. Using a reliable method to solve the shortcomings of traditional oil receivers is a problem that many water conservancy and hydropower engineers have been considering. Summary of the invention

[0003] The purpose of the present invention is to provide a novel runner blade adjustment system to solve the problem of hydraulic oil leakage in the existing blade adjustment system.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A novel runner blade adjustment system comprises a housing, a main relay oil cylinder is installed in the housing, the main relay oil cylinder is connected to a pneumatic piston cylinder, the pneumatic piston cylinder is connected to a driving hydraulic cylinder, a collector ring is installed above the driving hydraulic cylinder, an air rotary joint is installed above the collector ring, the air rotary joint is connected to a pneumatic control valve, the pneumatic control valve is connected to an air compressor, the pneumatic piston cylinder comprises a pneumatic piston, an A chamber, and a B chamber, the air rotary joint and the pneumatic piston cylinder are connected to each other, and the pneumatic piston cylinder is connected to each other. The A chamber and the B chamber are connected, the driving hydraulic cylinder comprises a hydraulic cylinder piston, a C chamber, and a D chamber. The hydraulic cylinder piston of the driving hydraulic cylinder is connected to a thrust plate, the thrust plate is connected to a thrust rod, and the other end of the thrust rod is connected to the pneumatic piston; a one-way valve is installed between the C chamber and the D chamber of the driving hydraulic cylinder, the main relay oil cylinder comprises a cylinder piston, an E chamber, an F chamber, and a central connecting rod, the D chamber of the driving hydraulic cylinder is connected to a hydraulically controlled solenoid valve, and the hydraulically controlled solenoid valve is connected to the E chamber and the F chamber of the main relay oil cylinder.

[0006] Furthermore, the slip rings are provided in multiple groups.

[0007] Furthermore, an opening measurement sensor is installed between the air rotary joint and the pneumatic control valve.

[0008] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0009] 1. In the present invention, when the air compressor is working, the air storage tank is filled with pressurized air with a pressure of 1.0MPa, which is transported to the pressure port of the pneumatic control valve through a pipeline. After the pneumatic control valve is switched, the air enters the A chamber and the B chamber of the pneumatic piston cylinder through the air rotary joint. When the pressurized air enters the A chamber, the pneumatic piston moves downward, and at the same time drives the thrust rod to drive the thrust plate downward, driving the hydraulic cylinder piston of the hydraulic cylinder to move downward, driving the D chamber of the hydraulic cylinder to generate pressure and transport it to the pressure port of the hydraulic control solenoid valve. After the hydraulic control solenoid valve is switched, the air enters the E chamber or the F chamber of the main relay cylinder, and the cylinder piston of the main relay cylinder moves and then drives the central connecting rod to drive the blade mechanism of the turbine or water pump to move. After the pneumatic control valve is switched, when the pressurized air enters the B chamber, the pneumatic piston moves upward, and at the same time drives the thrust rod to drive the thrust plate upward, driving the piston rod of the hydraulic cylinder to move upward, driving the D chamber of the hydraulic cylinder to generate negative pressure, the one-way valve opens, and the pressure oil in the C chamber enters the D chamber through the one-way valve. When the pneumatic control valve is switched again, when the pressurized air enters the A chamber, the cylinder piston moves downward, causing the D chamber to generate pressure oil again, and the action repeats in this way. This blade adjustment system adopts a combination of pneumatic and hydraulic methods, allowing the transmission part to use high-pressure air, which is then converted into high-pressure oil to drive the hydraulic cylinder to finally drive the blade to rotate, changing the previous blade adjustment system that was all hydraulically adjusted, and effectively solving the problem of hydraulic oil leakage in the previous adjustment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Markings in the figure: 1-housing, 2-opening measurement sensor, 3-main relay cylinder, 4-pneumatic piston cylinder, 5-driving hydraulic cylinder, 6-collector ring, 7-air swivel joint, 8-pneumatic control valve, 9-air compressor, 10-thrust plate, 11-thrust rod, 12-check valve, 13-cylinder piston, 14-central connecting rod, 15-hydraulic control solenoid valve, 16-hydraulic cylinder piston, 17-pneumatic piston. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the descriptions, and cannot be understood as indicating or implying relative importance.

[0017] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] A novel runner blade adjustment system comprises a housing, a main relay oil cylinder is installed in the housing, the main relay oil cylinder is connected to a pneumatic piston cylinder, the pneumatic piston cylinder is connected to a driving hydraulic cylinder, a collector ring is installed above the driving hydraulic cylinder, an air rotary joint is installed above the collector ring, the air rotary joint is connected to a pneumatic control valve, the pneumatic control valve is connected to an air compressor, the pneumatic piston cylinder comprises a pneumatic piston, an A chamber, and a B chamber, the air rotary joint and the pneumatic piston cylinder are connected to each other, and the pneumatic piston cylinder is connected to each other. The A chamber and the B chamber are connected, the driving hydraulic cylinder comprises a hydraulic cylinder piston, a C chamber, and a D chamber. The hydraulic cylinder piston of the driving hydraulic cylinder is connected to a thrust plate, the thrust plate is connected to a thrust rod, and the other end of the thrust rod is connected to the pneumatic piston; a one-way valve is installed between the C chamber and the D chamber of the driving hydraulic cylinder, the main relay oil cylinder comprises a cylinder piston, an E chamber, an F chamber, and a central connecting rod, the D chamber of the driving hydraulic cylinder is connected to a hydraulically controlled solenoid valve, and the hydraulically controlled solenoid valve is connected to the E chamber and the F chamber of the main relay oil cylinder.

[0020] Furthermore, the slip rings are provided in multiple groups.

[0021] Furthermore, an opening measurement sensor is installed between the air rotary joint and the pneumatic control valve.

[0022] During the implementation of the present invention, the air compressor works, and the air storage tank is filled with pressurized air with a pressure of 1.0MPa, which is transported to the pressure port of the pneumatic control valve through a pipeline. After the pneumatic control valve is switched, it enters the A chamber and the B chamber of the pneumatic piston cylinder through the air rotary joint. When the pressurized air enters the A chamber, the pneumatic piston moves downward, and at the same time drives the thrust rod to drive the thrust plate downward to drive the hydraulic cylinder piston of the hydraulic cylinder to move downward, and drives the D chamber of the hydraulic cylinder to generate pressure and transport it to the pressure port of the hydraulic control solenoid valve. After the hydraulic control solenoid valve is switched, it enters the E chamber or the F chamber of the main relay cylinder. The cylinder piston of the main relay cylinder moves and then drives the central connecting rod to drive the blade mechanism of the turbine or water pump to move. After the pneumatic control valve is switched, when the pressurized air enters the B chamber, the pneumatic piston moves upward, and at the same time drives the thrust rod to drive the thrust plate upward, driving the piston rod of the hydraulic cylinder to move upward, driving the D chamber of the hydraulic cylinder to generate negative pressure, the one-way valve opens, and the pressure oil in the C chamber enters the D chamber through the one-way valve. When the pneumatic control valve is switched again, when the pressurized air enters the A chamber, the cylinder piston moves downward, causing the D chamber to generate pressure oil again, and the action repeats in this way. This blade adjustment system adopts a combination of pneumatic and hydraulic methods, allowing the transmission part to use high-pressure air, which is then converted into high-pressure oil to drive the hydraulic cylinder to finally drive the blade to rotate, changing the previous blade adjustment system that was all hydraulically adjusted, and effectively solving the problem of hydraulic oil leakage in the previous adjustment system.

[0023] Example 1

[0024] A novel runner blade adjustment system comprises a housing, a main relay oil cylinder is installed in the housing, the main relay oil cylinder is connected to a pneumatic piston cylinder, the pneumatic piston cylinder is connected to a driving hydraulic cylinder, a collector ring is installed above the driving hydraulic cylinder, an air rotary joint is installed above the collector ring, the air rotary joint is connected to a pneumatic control valve, the pneumatic control valve is connected to an air compressor, the pneumatic piston cylinder comprises a pneumatic piston, an A chamber, and a B chamber, the air rotary joint and the pneumatic piston cylinder are connected to each other, and the pneumatic piston cylinder is connected to each other. The A chamber and the B chamber are connected, the driving hydraulic cylinder comprises a hydraulic cylinder piston, a C chamber, and a D chamber. The hydraulic cylinder piston of the driving hydraulic cylinder is connected to a thrust plate, the thrust plate is connected to a thrust rod, and the other end of the thrust rod is connected to the pneumatic piston; a one-way valve is installed between the C chamber and the D chamber of the driving hydraulic cylinder, the main relay oil cylinder comprises a cylinder piston, an E chamber, an F chamber, and a central connecting rod, the D chamber of the driving hydraulic cylinder is connected to a hydraulically controlled solenoid valve, and the hydraulically controlled solenoid valve is connected to the E chamber and the F chamber of the main relay oil cylinder.

[0025] With this arrangement, the air compressor works, and the air storage tank is filled with pressurized air with a pressure of 1.0MPa, which is transported to the pressure port of the pneumatic control valve through the pipeline. After the pneumatic control valve is switched, the air enters the A chamber and the B chamber of the pneumatic piston cylinder through the air rotary joint. When pressurized air enters the A chamber, the pneumatic piston moves downward, and at the same time drives the thrust rod to drive the thrust plate downward, driving the hydraulic cylinder piston of the hydraulic cylinder to move downward, driving the D chamber of the hydraulic cylinder to generate pressure and transport it to the pressure port of the hydraulic control solenoid valve. After the hydraulic control solenoid valve is switched, the air enters the E chamber or the F chamber of the main relay cylinder, and the cylinder piston of the main relay cylinder moves and then drives the central connecting rod to push the blade mechanism of the turbine or water pump to move. After the pneumatic control valve is switched, when the pressurized air enters the B chamber, the pneumatic piston moves upward, and at the same time drives the thrust rod to drive the thrust plate upward, driving the piston rod of the hydraulic cylinder to move upward, driving the D chamber of the hydraulic cylinder to generate negative pressure, the one-way valve opens, and the pressure oil in the C chamber enters the D chamber through the one-way valve. When the pneumatic control valve is switched again, when the pressurized air enters the A chamber, the cylinder piston moves downward, causing the D chamber to generate pressure oil again, and the action repeats in this way. This blade adjustment system adopts a combination of pneumatic and hydraulic methods, allowing the transmission part to use high-pressure air, which is then converted into high-pressure oil to drive the hydraulic cylinder to finally drive the blade to rotate, changing the previous blade adjustment system that was all hydraulically adjusted, and effectively solving the problem of hydraulic oil leakage in the previous adjustment system.

[0026] Example 2

[0027] Based on the first embodiment, the slip rings are provided in multiple groups.

[0028] Example 3

[0029] On the basis of Example 1, an opening measurement sensor is further installed between the air rotary joint and the pneumatic control valve.

[0030] As described above, the embodiments of the present invention are described above. The preferred embodiments of the present invention are described above. If the preferred implementation methods in each preferred embodiment are not obviously self-contradictory or based on a preferred implementation method, each preferred implementation method can be arbitrarily superimposed and used in combination. The embodiments and specific parameters in the embodiments are only for the purpose of clearly describing the verification process of the invention, and are not used to limit the patent protection scope of the present invention. The patent protection scope of the present invention is still subject to its claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel runner blade adjustment system, characterized in that: The invention comprises a housing, wherein a main relay oil cylinder (3) is installed in the housing (1), the main relay oil cylinder (3) is connected to a pneumatic piston cylinder (4), the pneumatic piston cylinder (4) is connected to a driving hydraulic cylinder (5), a collector ring (6) is installed above the driving hydraulic cylinder (5), an air rotary joint (7) is installed above the collector ring (6), the air rotary joint (7) is connected to a pneumatic control valve (8), the pneumatic control valve (8) is connected to an air compressor (9), the pneumatic piston cylinder (4) comprises a pneumatic piston (17), an A chamber, and a B chamber, the air rotary joint (7) is connected to the A chamber and the B chamber of the pneumatic piston cylinder (4), the driving hydraulic cylinder (5) is connected to the ... The driving hydraulic cylinder (5) comprises a hydraulic cylinder piston (16), a C chamber, and a D chamber. The hydraulic cylinder piston (16) of the driving hydraulic cylinder (5) is connected to a thrust plate (10), the thrust plate (10) is connected to a thrust rod (11), and the other end of the thrust rod (11) is connected to a pneumatic piston (17). A one-way valve (12) is installed between the C chamber and the D chamber of the driving hydraulic cylinder (5). The main relay oil cylinder (3) comprises an oil cylinder piston (13), an E chamber, an F chamber, and a central connecting rod (14). The D chamber of the driving hydraulic cylinder (5) is connected to a hydraulically controlled electromagnetic valve (15), and the hydraulically controlled electromagnetic valve (15) is connected to the E chamber and the F chamber of the main relay oil cylinder (3).

2. A novel runner blade adjustment system according to claim 1, characterized in that: The collector rings (6) are provided in multiple groups.

3. A novel runner blade adjustment system according to claim 1, characterized in that: An opening measurement sensor (2) is also installed between the air rotary joint (7) and the pneumatic control valve (8).

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