Built-in rotary blade angle hydraulic pressure regulator

Abstract

The invention discloses a built-in rotary blade angle hydraulic pressure regulator. The hydraulic pressure regulator consists of three parts of a regulator main body which is also called as a rotating body, an encloser (i.e. a fixing body) and a control display system, wherein the regulator main body or the regulator rotating body is installed and fixed at the top end of a matching main motor shaft of a pumping unit and synchronously rotates along with the rotation of the main motor shaft, and keeps a relative static state to the rotating parts of the pumping unit and a main motor at any time; the encloser (i.e. the fixing body) is installed and fixed at the top end of a main motor shell and keeps an absolute static state to the main motor shell; the control display system comprises a PLC (programmable logic controller), a touch screen and a relay, has manual and automatic control functions as well as local and remote control systems and full-automatically regulates the angle of a water pump blade through the PLC, so that a water pump operates in an efficient area all the time; and load operation can be realized. The hydraulic pressure regulator is suitable to be used with various full-regulating axial flow pumps.

Description

technical field [0001] The invention relates to a vane angle adjusting device of a vertical axial flow pump, in particular to a built-in rotary vane angle hydraulic regulator which adjusts the vane angle of the pump and displays the vane angle with numbers. Background technique [0002] There are mainly three types of regulators used in the existing domestic fully-regulated axial flow pumps: one is the external fixed blade angle mechanical regulator; the other is the built-in rotary blade angle mechanical regulator; the other is the water turbine, water pump blade Angle Hydraulic Synchronizer. They have the following defects respectively: [0003] 1. External fixed blade angle mechanical adjuster: 1. Long-term useless work: accelerate the wear of key components, namely plane bearings, causing unnecessary trouble and waste. The external fixed blade angle mechanical adjuster is installed and fixed on the top of the main motor housing for the water pump. In order to ensure th...

AI Technical Summary

Problems solved by technology

At the same time, when the main motor is working, even if the regulator is not required to work, the transmission shaft and plane bearing of the regulator will rotate with the main motor shaft at high speed, that is, to do useless work, resulting in long-term wear of the plane bearing, resulting in the trouble and trouble of frequently replacing the plane bearing. waste;

[0004] 2. The phenomenon of oil throwing is prominent: when the main motor and the main water pump are working, the drive shaft and plane bearing of the regulator will rotate at high speed with the main motor shaft, so the drive shaft and plane bearing will run at high temperature for a long time, causing the lubricating oil to liquefy or even vaporize , causing the regulator to throw oil prominently:

[0005] 3. The plane bearing is damaged when the water pump lifts the shaft and accelerates: the self-weight load of the regulator is borne by the main motor shell. When the water pump starts to lift the shaft, the impact force on the pump axis is easy to damage the motor base assembly or the mirror plate of the main motor, and it is easy to damage the regulator. Plane bearing; 4. It is impossible to implement remote display and remote control, let alone automatic adjustment of pump blade angle;

[0006] 2. Built-in rotary blade angle mechanical regulator: Although the existing built-in rotary blade angle mechanical regulator has solved the above four problems of the "external fixed blade angle mechanical regulator", it is limited by the diameter of the outlet. For large water pump blades over 2800mm, the huge adjustment force is not commensurate with the mechanical properties of the regulator. This kind of regulator is only suitable for supporting use on medium and small water pumps. It is really necessary to rely on the adjustment of hydraulic devices to use it on large water pumps. device;

The vane angle detected by the displacement sensor, that is, the actual operating vane angle of the water pump, changes with the movement of the regulator piston in the cylinder. If the hydraulic oil leaks, the position of the piston in the cylinder will be changed, resulting in a "collapsing angle". phenomenon occurs

② Although the wear of the sensor contact does not cause the change of the vane angle in the actual operation of the pump, the vane angle value displayed by the control display system will change with the wear of the sensor contact, so that the displayed vane angle value is consistent with the actual operation of the pump. Inconsistent, this also caused the phenomenon of "collapsing angle";

[0009] 2. "Shipping oil": First, the small motor of the regulator, oil pump, electromagnetic reversing valve, one-way hydraulic control valve, etc. are all installed and fixed at the bottom of the fuel tank. The inlet hole is prone to chemical reaction between the wire rubber sleeve and the oil and sealing material, resulting in porosity, which causes the fuel tank to throw oil; the second is the leakage of the piston rod in the cylinder through the wall of the cylinder and the top of the piston for the sensor to detect the displacement. The extension rod passes through the two leakage points at the cylinder wall to throw oil;

[0010] 3. It is easy to burn the power supply slip ring: because the power supply slip ring is an open type slip ring, it is easy to burn the slip ring due to the accumulation of dust between the carbon brush and the slip ring; Scratches on the contact surface of the slip ring are more likely to generate arcs and cause the slip ring to burn;

[0011] 4. The sensor contacts are easily damaged or worn: the displacement sensor is installed on the housing of the regulator in a static state, and the detected object is in a high-speed rotating state with the main motor shaft for a long time, resulting in long-term wear of the sensor contacts. The sensor probe rod needs to be replaced;

[0012] 5. Unsightly: the displacement sensor and the blade angle mechanical display device are installed on the top of the regulator outer casing, which seriously affects the aesthetics of the regulator and even the overall aesthetic effect of the pump unit;

[0013] 6. The angle of the pump blades cannot be adjusted automatically: the current regulator can only adjust the angle of the pump blades manually or by clicking the button with the mouse on the computer screen according to the readings of the ammeter or power meter on the operating table of the pump station or the power distribution panel. The fully automatic adjustment of the pump blade angle is not implemented, which seriously affects the benefits of the fully regulated water pump

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