CN202417781U - Structure of full-oil operating unit-controlled water turbine nozzle - Google Patents

Abstract

In order to overcome the existing problems of the impact turbine nozzles in the prior art, such as the complicated structure, the inability to be controlled by the unit, and the need for clean water to control the closure of the spray needle, the utility model proposes a hydraulic turbine nozzle structure controlled by the full oil operation unit. An oil-water isolation chamber is arranged between the needle closing chambers, and a pressure oil oil pipe is connected to the input port of the needle closing chambers, and there is no rod connection between the governor and the nozzles or between the nozzles. The beneficial technical effect of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model is that the opening and closing of the nozzles are all operated by hydraulic oil, which avoids the problems caused by the use of clean water; the rod connection is canceled so that the multi-nozzle unit can be controlled separately opening and closing of each nozzle.

Description

Turbine nozzle structure controlled by full oil operation unit

technical field

The utility model relates to a water turbine nozzle structure, in particular to a water turbine nozzle structure controlled by an all-oil operation unit.

Background technique

The nozzle is one of the main components of the impact turbine. The nozzle includes two main control elements, the needle and the deflector. Among them, the needle is mainly used to open or close the nozzle and adjust the water flow during normal operation, and the deflector is mainly used in the unit. When the load is unloaded, the direction of the jet flow is quickly changed to prevent the unit from flying away. The nozzles of the impact turbines in the prior art are mainly oil-controlled and water-operated, that is, the pressure oil is used to control the pressure distribution valve to realize the opening of the injection needle, and the pressure water is used to control the closure of the injection needle. In order to ensure the normal operation of the water operation, clean water is required for the pressure water, that is, the water in the pressure pipe is filtered and then input into the water operation chamber to control the closing of the nozzle needle. In actual operation, due to reasons such as floods, the poor water quality may cause the supply of clean water to be unguaranteed, causing the unit to shut down. In addition, in the prior art, the speed governor and the nozzles of the impact type multi-nozzle turbine or between the nozzles are connected by rods, which are controlled by mechanical transmission, so that the needle and the deflector are linked, that is, the needle of one nozzle is in the open state. state, the needles of other nozzles will also be in the open state, and vice versa, which is the so-called multiple control. As a result, the water turbine unit cannot arbitrarily switch the number of multiple nozzles to meet the operation of single and double nozzles, so that the unit load is operated in a low-efficiency zone in the region below 50%. Apparently, the nozzles of the impact turbines in the prior art have problems such as relatively complex structure, the need for pressurized clean water to control the closing of the spray needles, and the inability to be controlled by a unit.

Contents of the invention

In order to overcome the existing problems of the impact turbine nozzle in the prior art, such as complex structure, incapable of unit control, and the need for clean water to control the nozzle closure, the utility model proposes a hydraulic turbine nozzle structure controlled by a full oil operation unit. The hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model is provided with an oil-water isolation chamber between the nozzle flow channel and the nozzle closing chamber, and a pressure oil oil pipe is connected to the input port of the nozzle closing chamber, and, in the speed regulation There is no rod connection between the device and the nozzle or between the nozzle and the nozzle.

The beneficial technical effect of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model is that the opening and closing of the nozzles are all operated by hydraulic oil, which avoids the problems caused by the use of clean water; the rod connection is canceled so that the multi-nozzle unit can be controlled separately opening and closing of each nozzle.

Description of drawings

Accompanying drawing 1 is the schematic diagram of prior art impact turbine nozzle structure;

Accompanying drawing 2 is the schematic diagram of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model.

The nozzle structure of the hydraulic turbine controlled by the full oil operation unit of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Detailed ways

Accompanying drawing 1 is the schematic diagram of the nozzle structure of the prior art impact turbine. In the figure, 1 is a deflector, 2 is a spray needle, 3 is a pressure water input port of a water operation chamber, and 4 is a feedback rocker arm. It can be seen from the figure that the nozzles of the impact turbines in the prior art are mainly oil-controlled and water-operated structures, which use pressure oil to control the opening of the spray needles, and use pressure water to control the closure of the spray needles. In order to ensure the normal operation of the water operation, clean water is required for the pressure water, that is, the water in the pressure pipe is filtered and then input into the water operation chamber to control the closing of the nozzle needle. In actual operation, due to reasons such as floods, the poor water quality may cause the supply of clean water to be unguaranteed, causing the unit to shut down. In addition, in the prior art, the speed governor and the nozzles of the impulse multi-nozzle turbine or between the nozzles are connected by rods, which are controlled by mechanical transmission, so that the spray needle and the deflector are linked, that is, the spray needle of one nozzle is opened state, the needles of other nozzles will also be in the open state, and vice versa, which is the so-called multiple control. As a result, the water turbine unit cannot arbitrarily switch the number of multiple nozzles to meet the operation of single and double nozzles, so that the unit load is operated in a low-efficiency zone in the region below 50%. Apparently, the nozzles of the impact turbines in the prior art have problems such as relatively complex structure, the need for pressurized clean water to control the closing of the spray needles, and the inability to be controlled by a unit.

Accompanying drawing 2 is the schematic diagram of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the present utility model, in the figure, 1 is the deflector, 2 is the injection needle, 4 is the feedback rocker arm, 5 is the pressure oil input port of the injection needle closing chamber, 6 There is an input port for the opening chamber pressure of the spray needle, and 7 is an oil-water isolation chamber. It can be seen from the figure that the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model is provided with an oil-water isolation chamber 7 between the nozzle flow channel and the needle closing chamber, and a pressure oil oil pipe is connected to the input port of the needle closing chamber 5 , and there is no rod connection between the governor and the nozzle or between the nozzle and the nozzle. The nozzle structure of the hydraulic turbine controlled by the full oil operation unit of the utility model adopts pressure oil to control the closing of the spray needle, and the closing operation of the spray needle is stable, avoiding the problem that the unit cannot be shut down due to the inability to guarantee the supply of clean water. Since the opening and closing of the spray needle in the nozzle structure of the water turbine of the utility model is controlled by hydraulic oil, the rod connection between the governor and the nozzle or between the nozzle and the nozzle can be canceled, and the linkage between the spray needle and the deflector is released, that is Unit control can be realized, so it is called the hydraulic turbine nozzle structure with full oil operation unit control. Obviously, since hydraulic oil is used to control the opening and closing of the spray needle, the operation of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model will be very stable and will not be affected by the external environment. In addition, since there is no rod connection between the governor and the nozzle, when one nozzle is put into operation, the spray needle and the deflector are in the fully open position, while the other spray needles are in the closed position. Conversely, when one needle is closed, the matching deflector is closed accordingly, while the other deflectors are still in the fully open position. Such a configuration creates conditions for the combined operation of different nozzle numbers. The hydropower station can switch the nozzles according to the requirements of the grid load, so that the unit can maintain high-efficiency operation in a wide range. Obviously, the beneficial technical effect of the hydraulic turbine nozzle structure controlled by the full oil operation unit of the utility model is that the opening and closing of the nozzles are all operated by hydraulic oil, which avoids the problems caused by the use of clean water; the rod connection is canceled so that the multi-nozzle unit can Control the opening and closing of each nozzle separately. Moreover, it has the advantages of compact structure, simple operation, stable operation of the unit, safety and reliability, etc., and its installation and maintenance are very convenient.

Claims (1)

1. the water turbine nozzle arrangements of a complete oily operating unit control; It is characterized in that: close at nozzle flow channel and nozzle needle and be provided with the profit separate cavities between the chamber; Be connected with the oil pipe of pressure oil in the inlet opening that nozzle needle is closed the chamber; And, between speed regulator and nozzle or between nozzle and the nozzle, rod member is not set and is connected.

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