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servo-controlled valve

A servo control and butterfly valve technology, applied in the field of hydraulic dynamometer drain valve, can solve the problems of affecting control accuracy, unsuitable working conditions, large cumulative error, etc., to avoid potential safety hazards, improve operation stability, and improve flow regulation performance. Effect

Active Publication Date: 2018-09-14
YICHANG MARINE DIESEL ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the torque of the stepping motor or servo motor in this connection mode is small, it is difficult to solve the water volume adjustment of the low-speed high-power hydraulic dynamometer, and the stepping motor has the defect of out-of-step, which affects the control accuracy. The feedback control accuracy is not high, and the cumulative error is large
[0004] There are also butterfly valves driven by worm gears in the prior art, but their power is manually driven, which is not suitable for the working conditions of the present invention.

Method used

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Effect test

Embodiment 1

[0028] like Figure 1~4 Among them, a servo-controlled valve includes a butterfly valve 4, and the butterfly valve 4 is fixedly installed on the valve seat 1. The preferred scheme is as follows figure 2 Among them, the butterfly valve 4 is connected to the drain flange 2 at one end by stud bolts, and the other end is connected to the water inlet rubber hose joint 3, and the water inlet rubber hose joint 3 is connected to the shell of the hydraulic dynamometer. The hose part of the fitting compensates for positional changes caused by the swing of the housing. The valve seat 1 is a right-angled trapezoidal structure, and one side of the right-angle is close to the drain flange 2 . The valve seat 1 is fixedly installed on the base of the hydraulic dynamometer.

[0029] The valve stem 5 of the butterfly valve 4 is set in the housing fixedly connected with the valve seat 1, the valve stem 5 of the butterfly valve 4 is fixedly connected with the worm gear 14, specifically the wor...

Embodiment 2

[0038] On the basis of embodiment 1, the following is that the diameter is 150mm, and the hydraulic dynamometer drain valve with working pressure of 1.0MPa is carried out according to the specific implementation process of the present invention:

[0039] 1. The side view section of valve seat 1 is a right-angled trapezoid, such as figure 2 As shown in , the bottom plane is fixed on the base of the hydraulic dynamometer with bolts, and the outside of the vertical surface of the valve seat is fixed with a drain flange 2 with a diameter of 250mm. The expansion of the pipe diameter reduces the pressure of the water outlet and facilitates drainage. The smoothness of the pipeline. There is a set of stud bolts on the inner side of the vertical surface of the valve seat, and the adjustable butterfly valve 4 with a diameter of 150mm and an effective working pressure of 1.0MPa is installed on the inner side of the valve seat in a clamping manner through the flange surface of the rubber...

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Abstract

The invention provides a servo-controlled valve and relates to the field of drain valves of hydraulic dynamometers. The servo-controlled valve comprises a butterfly valve fixedly mounted on a valve seat; a valve rod of the butterfly valve is fixedly connected with a worm wheel; a worm is meshed and connected with the worm wheel; one end of the worm is connected with a servo motor, and the other end of the worm is connected with a hand wheel; and the valve rod is fixedly connected with a position encoder. Due to the adoption of structural combination of the servo motor, a worm wheel and worm mechanism and the position encoder, the precise and automatic control on the opening of the butterfly valve can be realized; and tests prove that the regulating range of the opening of the valve provided by the invention is about 0-90 DEG, and the flow regulating characteristic curve of the valve is basically linear when the opening is between 15 DEG and 70 DEG, so that the valve has relatively good flow regulating performance.

Description

technical field [0001] The invention relates to the field of hydraulic dynamometer drain valves, in particular to a servo-controlled drain valve for hydraulic dynamometers. Background technique [0002] The low-speed high-power hydraulic dynamometer measures the power of the prime mover through the energy transfer of water. The shafting of the hydraulic dynamometer is connected with the tested prime mover through a coupling. The shafting is supported on the casing by the bearings at both ends, and the casing is supported on the lug bearing frames at both ends of the base, and can rotate slightly around the axis. When the hydraulic dynamometer is working, the water flows through the rotor on the shaft system and rotates. Due to friction, an annular water circle is formed between the water flow and the stator fixed on the casing. At the same time, the stator in the housing is impacted by the water circle, causing the housing to rotate slightly around the axis. The rotation sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/05F16K31/60F16K31/53F16K1/32
CPCF16K1/32F16K31/055F16K31/53F16K31/60
Inventor 孙仁君
Owner YICHANG MARINE DIESEL ENGINE