CN108560512A - Surge-chamber with flexible sudden expansion interface and impedance,motional - Google Patents

Abstract

The present invention provides a kind of surge-chambers with flexible sudden expansion interface and impedance,motional, by penstock, disappear and has a meeting, an audience, etc. well under one's control, main chamber, gas vent, keep off winding, support, lower impeller, upper impeller, bearing, shaft, blade forms, the sectional area of having a meeting, an audience, etc. well under one's control of disappearing is 16 times of penstock sectional area, disappear and has a meeting, an audience, etc. well under one's control for example same isodiametric penstock of opposite penstock with compliant interface, high pressure water soot blower is entered to disappear by the penstock of downstream rigid interface has a meeting, an audience, etc. well under one's control, section sudden enlargement, interface becomes flexible by rigidity suddenly, 16 times of cross-section of river sudden expansion, water hammer energy is largely absorbed, it is very small that water hammer enters back into upstream penstock pressure；High pressure water-driven inferior lobe wheel, the rotation of upper impeller can equally consume energy；Lower impeller, upper impeller discharge area are only the 8% of main chamber's horizontal section area, and impeller plays hindrance function and continues energy dissipating；Disappear and have a meeting, an audience, etc. well under one's control with rupture disk effect of energy dissipation, lower impeller, upper impeller have rigid impedance structure effect again can the energy dissipating in rotary course.

Description

Surge-chamber with flexible sudden expansion interface and impedance,motional

Technical field

The invention belongs to hydraulic engineering technical field, specifically a kind of pressure regulation with flexible sudden expansion interface and impedance,motional Room.

Background technology

Power station water turbine set is during the Load Regulation for being switched on and shutting down, especially in the unexpected removal of load situation of accident Under, since the fluid inertia of water-carriage system acts on, the pressure of water-carriage system pipeline will fluctuate widely therewith, water-carriage system Pipeline is longer, and fluctuation of pressure is bigger, that is, so-called water hammer occurs；Therefore, in long water-carriage system hydroelectric station design, in order to So that the fluctuation of pressure amplitude of pressure pipeline is met the security needs in power station, surge-chamber is usually set；Downstream surge-chamber is building In a concora crush building that can cause water hammer wave reflection of hydropower station pressure penstock and pressure piping joint, can prevent Water soot blower travels in pressure diversion road, the service condition for reducing the water hammer value in pressure piping, improving unit；Conventional tune Pressure chamber has simple-type, impedance type, two chamber, differential type, air-cushion type, overflow-type etc., all has respective advantage and defect place； " water hammer rupture disk " is position most weak at Design of Pressure Piping one, installs i.e. rupturable diaphragm after a kind of compression, when After pressure conduit is by water hammer pressure, rupture of diaphragm aerial drainage, to limit the raising of water hammer pressure, the shortcomings that water hammer rupture disk It is to need to re-replace after rupturing, and to consider the influence of aerial drainage；Above-mentioned various forms of surge-chamber water-level fluctuation amplitudes, decline Deceleration, still not up to ideal effect influence the efficiency of power generation；To find out its cause, being considered when conventional surge-chamber design：Impedance hole The smaller water-level fluctuation amplitude of open area is smaller, and the smaller water hammer pressure of Orifice area can be bigger, and designer wishes water hammer Pressure is small, while wishing that surge-chamber water-level fluctuation amplitude is small again, is recycled for contradiction as solution always, fails to have great It breaks through.

Invention content

In order to solve the above technical problems existing in the prior art, the present invention provides one kind having flexible sudden expansion interface And the surge-chamber of impedance,motional, by penstock, disappear have a meeting, an audience, etc. well under one's control, main chamber, gas vent, gear winding, support, lower impeller, upper impeller, bearing, Shaft, blade composition, the penstock, disappear have a meeting, an audience, etc. well under one's control, main chamber, gas vent connection, gear winding by concreting, fixation set It sets in penstock and the upstream junction of having a meeting, an audience, etc. well under one's control that disappears；One end is supported to be fixedly installed with bearing, the support other end is fixed with main chamber's inner wall Setting, shaft upper end are fixedly installed with upper impeller, and shaft lower end is fixedly installed with lower impeller；Lower impeller, upper impeller discharge area It is the 8% of main chamber's horizontal section area.

Further, described disappear is had a meeting, an audience, etc. well under one's control 4 times of a diameter of penstock diameter, that is, the sectional area of having a meeting, an audience, etc. well under one's control of disappearing is penstock section Long-pending 16 times；The length of having a meeting, an audience, etc. well under one's control of disappearing is 5 times of penstock diameter.

Further, 2 times of a diameter of penstock diameter in the main chamber, i.e. main chamber's sectional area are penstock sectional area 4 times.

The present invention's there is the advantageous effect of the surge-chamber of flexible sudden expansion interface and impedance,motional to be：Due to the sectional area of having a meeting, an audience, etc. well under one's control that disappears It is 16 times of penstock sectional area, disappears for having a meeting, an audience, etc. well under one's control diameter with respect to penstock diameter, such as same isodiametric penstock has Compliant interface, the peak pressure of high pressure water soot blower is entered to disappear by the penstock of downstream rigid interface has a meeting, an audience, etc. well under one's control, section sudden enlargement, boundary Face becomes flexible by rigidity suddenly, and 16 times of cross-section of river sudden expansion, water hammer energy is largely absorbed, water hammer peak pressure drastically under Drop, when water soot blower enters back into upstream penstock, pressure is very small, and 1/16 or so of only former pressure values；By disappear have a meeting, an audience, etc. well under one's control into Enter the lower impeller of flow driving of main chamber, the rotation of upper impeller can further consume energy；Lower impeller, upper impeller discharge area are only The 8% of main chamber's horizontal section area, impeller plays the role of impedance,motional, compared with the quiet impedance of rigidity, passes through the flow of impeller impedance,motional It is that tunneling boring disturbs with main chamber's water body, effect of energy dissipation is more preferable in the case that flow is constant；The surge-chamber, which disappears, has a meeting, an audience, etc. well under one's control by rigid interface Compliant interface is sported, there is rupture disk effect of energy dissipation, the impedance,motional that lower impeller, upper impeller are formed to have and surmount the quiet resistance of rigidity The effect of resistive connection structure, you can reduce water hammer wave-amplitude, and have effect of energy dissipation；The invention has flexible sudden expansion interface and impedance,motional Surge-chamber surge-chamber water hammer wave-amplitude can be greatly lowered and water hammer the pressure decaying speed can be speeded.

Description of the drawings

Fig. 1 is the surge-chamber arrangement schematic diagram with flexible sudden expansion interface and impedance,motional；

Fig. 2 is the surge-chamber schematic top plan view；

Fig. 3 is A-A diagrammatic cross-sections；

Fig. 4 is B-B diagrammatic cross-sections；

Fig. 5 is C-C diagrammatic cross-sections；

Fig. 6 is support and main chamber wall relation schematic diagram；

Fig. 7 is blade schematic diagram.

Specific implementation mode

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

As shown in figs. 1-7, the surge-chamber with flexible sudden expansion interface and impedance,motional of the invention, by penstock 1, disappears and has a meeting, an audience, etc. well under one's control 2, main chamber 3, gas vent 4, gear winding 5, support 6, lower impeller 7, upper impeller 8, bearing 9, shaft 10, blade 11 form, described Penstock 1, disappear 2, main chamber 3, the connection of gas vent 4 of having a meeting, an audience, etc. well under one's control, which is set as downstream surge-chamber, and effect is optimal；Winding 5 is kept off by mixing Solidifying soil pours, is fixed at penstock 1 and the 2 upstream junctions of having a meeting, an audience, etc. well under one's control that disappear, and can stop that the water hammer pressure in 2 of having a meeting, an audience, etc. well under one's control of disappearing draws to upstream Water channel 1 converges again；6 one end are supported to be fixedly installed with bearing 9,6 other ends of support are fixedly installed with 3 inner wall of main chamber, in shaft 10 End is fixedly installed with upper impeller 8, and 10 lower end of shaft is fixedly installed with lower impeller 7；Lower impeller 7,8 discharge area of upper impeller are main chamber The 8% of 3 horizontal section areas can be realized, inferior lobe by floor projection overlapping area between the angle and blade 11 of regulation blade 11 Wheel 7,8% that 8 discharge area of upper impeller is 3 horizontal section area of main chamber, lower impeller 7,8 discharge area of upper impeller are then penstock 1 The 32% of area of section meets《Hydraulic power plant surge-chamber design specification》It is recommended that Orifice area cannot draw less than surge-chamber bottom The 15% of water channel area requires.

Described disappear is had a meeting, an audience, etc. well under one's control 4 times of 2 a diameter of penstock, 1 diameter, that is, disappear have a meeting, an audience, etc. well under one's control that 2 sectional areas are 1 sectional area of penstock 16 Times, it has a meeting, an audience, etc. well under one's control in 2 ranges disappearing, if constant regarding 1 diameter of penstock, disappear and have a meeting, an audience, etc. well under one's control 2 just as flexible boundary, there is rupture disk Effect, water soot blower enter the compliant interface of 2 ranges of having a meeting, an audience, etc. well under one's control that disappears by rigid interface, and water soot blower pressure is die-offed；If existed depending on penstock 1 Disappear to have a meeting, an audience, etc. well under one's control and transmit pressure along 2 tunneling borings of having a meeting, an audience, etc. well under one's control of disappearing in 2 ranges, then 1/16 or so of the only surplus former pressure values of water soot blower pressure, water hammer It is very small that peak pressure enters back into upstream penstock；2 length of having a meeting, an audience, etc. well under one's control of disappearing are 5 times of 1 diameter of penstock so that disappear and have a meeting, an audience, etc. well under one's control 2 There is enough water body to absorb water hammer energy, 2 does not use section sudden expansion or no sufficient length if disappearing to have a meeting, an audience, etc. well under one's control, increasing is not achieved The effect of fast water hammer the pressure decaying speed, the surge-chamber that technology uses at present generally use connecting tube to be connected to penstock, even Tube diameter is much smaller than penstock diameter, 102337752 B equal-diameter quasi-surge shaft for water pipe of Chinese patent CN（CN 201738377 U equal-diameter quasi-surge shaft for water pipe）, connecting tube is relatively large in diameter, also only identical as penstock diameter；It is described 2 times of 3 a diameter of penstock of main chamber, 1 diameter, i.e. 3 sectional area of main chamber is 4 times of 1 sectional area of penstock.

The present invention there is the surge-chamber of flexible sudden expansion interface and impedance,motional in use, hydraulic unit in booting and During the Load Regulation of shutdown, especially in the unexpected removal of load of accident, the water soot blower that system generates can be passed upstream It broadcasts；Arrival disappears have a meeting, an audience, etc. well under one's control after, 16 times of cross-section of river sudden expansion, interface becomes flexible by rigidity suddenly, and water hammer energy is largely absorbed, water Hammer peak pressure enters back into that upstream penstock is very small, and 1/16 or so of only former pressure values；Flow into main chamber is driven Dynamic lower impeller, the rotation of upper impeller can further consume energy；Lower impeller, upper impeller discharge area are only main chamber horizontal cross-section face Long-pending 8%, impeller play the role of impedance,motional and continue energy dissipating, compared with the quiet impedance of rigidity, not by the water flow of impeller impedance,motional It is that tunneling boring disturbs with main chamber's water body, effect of energy dissipation is more preferable in the case of change；Lower impeller, upper impeller discharge area is small can be big Amplitude reduction surge-chamber water hammer wave-amplitude, accelerates its rate of decay.

Claims (3)

1. a kind of surge-chamber with flexible sudden expansion interface and impedance,motional, by penstock (1), disappear have a meeting, an audience, etc. well under one's control (2), main chamber (3), exhaust Hole（4), gear winding (5), support (6), lower impeller（7）, upper impeller (8), bearing (9), shaft (10), blade（11) it forms, It is characterized in that：The penstock (1), disappear have a meeting, an audience, etc. well under one's control (2), main chamber (3), gas vent（4) it is connected to, gear winding (5) is poured by concrete It builds, be fixed at penstock (1) and (2) the upstream junction of having a meeting, an audience, etc. well under one's control that disappears；(6) one end is supported to be fixedly installed with bearing (9), support (6) other end and main chamber (3) inner wall are fixedly installed, and shaft (10) upper end is fixedly installed with upper impeller (8), shaft (10) lower end with Lower impeller (7) fixed setting；Lower impeller (7), 8% that upper impeller (8) discharge area is main chamber (3) horizontal section area.

2. the surge-chamber with flexible sudden expansion interface and impedance,motional as described in claim 1, it is characterised in that：Described disappears It has a meeting, an audience, etc. well under one's control 4 times of (2) a diameter of penstock (1) diameter, that is, disappear have a meeting, an audience, etc. well under one's control that (2) sectional area is penstock (1) sectional area 16 times；Disappear (2) length of having a meeting, an audience, etc. well under one's control is 5 times of penstock (1) diameter.

3. the surge-chamber with flexible sudden expansion interface and impedance,motional as described in claim 1, it is characterised in that：The master 2 times of room (3) a diameter of penstock (1) diameter, i.e. main chamber (3) sectional area are 4 times of penstock (1) sectional area.