CN104842313B - A kind of guide vane arm provision for disengagement - Google Patents

Abstract

The invention provides a guide vane crank arm dismounting device, which includes an actuator, a coupling mechanism and a supporting mechanism. The supporting mechanism is composed of an upper supporting ring, a lower supporting ring and a supporting arm, wherein the diameter of the upper supporting ring is smaller than that of the lower supporting ring. ring, the support arm is 7-shaped and has six sets, the two ends of the support arm are respectively fixedly connected with the upper support ring and the lower support ring, the upper support ring and the lower support ring are fixed to each other, and the upper support ring and the lower support ring Parallel to each other and coaxial, the six support arms are evenly distributed between the upper support ring and the lower support ring, and perpendicular to the upper support ring and the lower support ring; threaded holes are evenly distributed on the lower support ring, and the The coupling mechanism is a screw, which is installed in the threaded hole on the lower support ring and tightly fixed with the guide vane arm; the actuator is a pneumatic hydraulic servomotor, and the servomotor is matched to the upper support ring through the lower support ring . The invention has the advantages of simple structure, convenient use, high precision, safety and reliability.

Description

A guide vane crank arm removal device

technical field

The patent of the present invention relates to a new type of guide vane arm dismantling device, in particular to a guide vane arm dismantling device suitable for a pumped storage unit with a capacity of 300MW.

Background technique

The guide vane crank arm removal device is mainly used in the field of hydropower. During the overhaul of the hydropower station unit, when the guide vane arm of the pump turbine is disassembled, it often takes time and effort to dismantle the guide vane arm, and there is a safety risk of damage to the mechanical components of the guide vane arm. The existing guide vane crank arm disassembly method is often manually disassembled by maintenance personnel using hydraulic tools based on experience. Manual disassembly requires high human experience and technical requirements, and the lifting accuracy cannot be accurately positioned, and the disassembly cycle is long. Therefore, in order to solve the deficiencies of the prior art, there is an urgent need in the art to provide a novel guide vane arm removal device that is easy to operate, safe and reliable, so as to solve the problem of difficult disassembly of the guide vane arm.

Contents of the invention

The patent of the present invention provides a novel guide vane crank arm dismantling device, which solves the deficiencies in the background technology. The device has a simple structure, is convenient to use, has high precision, and is safe and reliable.

The technical scheme adopted to realize the above-mentioned purpose of the patent of the present invention is:

A guide vane arm removal device, including an actuator, a coupling mechanism and a support mechanism, the support mechanism is composed of an upper support ring, a lower support ring and a support arm, wherein the diameter of the upper support ring is smaller than that of the lower support ring, and the support arm It is 7-shaped and has six sets. The two ends of the support arm are fixedly connected to the upper support ring and the lower support ring respectively, and the upper support ring and the lower support ring are fixed to each other, and the upper support ring and the lower support ring are parallel to each other and at the same time. shaft, six support arms are evenly distributed between the upper support ring and the lower support ring, and are perpendicular to the upper support ring and the lower support ring; threaded holes are evenly distributed on the lower support ring, and the coupling mechanism is a screw , the screw rod is installed in the threaded hole on the lower support ring and tightly fixed with the guide vane crank arm, the support mechanism is fixedly connected with the guide vane crank arm through the screw rod; the actuator is a pneumatic hydraulic servomotor, and the servomotor passes through the lower A support ring fits onto the upper support ring.

There are three semicircular limiting holes for positioning distributed on the lower supporting ring.

Described screw hole is provided with six, and its diameter is 24 millimeters.

The inner diameter of the upper support ring is 80mm, the outer diameter is 150mm, and the height is 50mm; the inner diameter of the lower support ring is 280mm, the outer diameter is 405mm, and the height is 50mm; the support arm is 450mm high, 50mm wide, and 50mm thick.

The new guide vane crank arm removal device provided by the patent of the present invention has the following advantages: 1. The rigidity of the support ring and the support arm is good, and the support arm is evenly distributed around the support ring, which can play a better balance; 2. The screw is used as the connection Mechanism, the additional force is small, which can reduce the damage to the guide vane arm; 3. The pneumatic hydraulic device is used for precise positioning and disassembly to ensure the disassembly accuracy and safety performance.

Description of drawings

Fig. 1 is a schematic plan view of the guide vane arm removal device provided by the patent of the present invention;

Fig. 2 is a three-dimensional structural schematic diagram of the guide vane arm removal device provided by the patent of the present invention;

In the figure: 1-upper support ring, 2-support arm, 3-lower support ring, 4-threaded hole, 5-limiting hole.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

The overall structure of the guide vane crank arm removal device provided by the present invention is shown in Figure 1 and Figure 2, including an actuator, a coupling mechanism and a support mechanism, and the support mechanism is composed of an upper support ring 1, a lower support ring 3 and a support Arm 2 is composed, wherein the diameter of the upper support ring 1 is smaller than that of the lower support ring 3, the inner diameter of the upper support ring 1 is 80mm, the outer diameter is 150mm, and the height is 50mm. The inner diameter of the lower support ring 3 is 280mm, the outer diameter is 405mm, and the height is 50mm; the support arms 2 are 7-shaped and there are six support arms, the height of which is 450mm, the width is 50mm, and the thickness is 50mm. The two ends of the support arm 2 are fixedly connected to the upper support ring 1 and the lower support ring 3 respectively, and the upper support ring 1 and the lower support ring 3 are fixed to each other, and the upper support ring and the lower support ring are parallel to each other and coaxial, and the six support rings The arms 2 are evenly distributed between the upper support ring and the lower support ring, and are perpendicular to the upper support ring and the lower support ring. There are three semicircular limiting holes 5 for positioning distributed on the lower supporting ring.

The lower supporting ring 3 is evenly distributed with threaded holes 4, and there are six threaded holes 4 with a diameter of 24 mm. The coupling mechanism is a screw, and the screw is installed in the threaded hole 4 on the lower support ring and is tightly fixed with the guide vane arm, and the support mechanism is fixedly connected with the guide vane arm through the screw; the actuator is a pneumatic hydraulic The servomotor is matched to the upper support ring through the lower support ring.

The method of using the guide vane arm dismantling device provided by the present invention is as follows. First, the guide vane arm end cover is disassembled with a pneumatic tool to expose the guide vane arm, and then the guide vane arm dismantling device is closely connected with it by a screw , by operating the pneumatic hydraulic servomotor, not only can the guide vane arm be given sufficient and uniform lifting force in six directions, but also the lifting accuracy can be controlled manually, so the guide vane arm can be disassembled quickly and reliably, so that the guide vane Difficult disassembly of the crank arm.

Claims (1)

1. a kind of guide vane arm provision for disengagement, it is characterised in that：It is described including executing agency, coupling mechanism and supporting mechanism Supporting mechanism be made up of upper support ring, lower support ring and support arm, wherein the diameter of upper support ring is less than lower support ring, support Arm is in 7 fonts and is provided with six, and the two ends of support arm are fixedly connected with upper support ring and lower support ring respectively, by upper support ring Interfixed with lower support ring, and upper support ring and lower support ring are parallel to each other and coaxial, six support arms are evenly distributed in Between upper support ring and lower support ring, and it is vertical with upper support ring and lower support ring；The internal diameter of upper support ring is 80mm, and external diameter is 150mm, a height of 50mm, the internal diameter of lower support ring is 280mm, and external diameter is 405mm, a height of 50mm；Support arm high 450mm, it is wide 50mm, thick 50mm；Screwed hole is evenly distributed with described lower support ring, described screwed hole is provided with six, and its is a diameter of 24 millimeters；The coupling mechanism is screw rod, and the screw rod is installed in the screwed hole in lower support ring and close with guide vane arm Fixed, supporting mechanism is fixedly connected by screw rod with guide vane arm；Described executing agency is Pneumatic hydraulic servomotor, servomotor It is coupled to by lower support ring in upper support ring；Be distributed with described lower support ring three semicircle shapes be used to positioning it is spacing Hole.