CN2412102Y

CN2412102Y - Water turbine

Info

Publication number: CN2412102Y
Application number: CN00222532U
Authority: CN
Inventors: 杨海泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-17
Filing date: 2000-03-17
Publication date: 2000-12-27
Anticipated expiration: 2010-03-17

Abstract

The utility model relates to a water turbine which can convert water energy into mechanical energy. The utility model is composed of a casing, a blade type rotary wheel supported in an inner cavity of the casing through a rotary shaft and a bearing structure and a machine seat for supporting the casing.

Description

Water turbine

The utility model relates to a kind of water turbine, is used for water can be converted to mechanical energy, replaces existing water turbine, and it includes casing, is supported on blade type runner in the chassis cavity by rotating shaft and bearing structure, the support of supporting casing.

At present, water turbine has water turbine such as water bucket type, impact.Pelton wheel includes casing, rotating shaft, runner, jet pipe, deflecting plate, diversion plate, tank and brake jet etc., energy loss mainly occurs in the jet pipe and converts current to kinetic energy, again energy of the impinging jet is converted in the process of rotating mechanical energy, reaction turbine needs roomy spiral case, interlobate spacing is roomy, causes energy loss bigger.Above-mentioned two kinds of structures all will be installed the restriction of geographical conditions, and the construction work amount is big.

The purpose of this utility model is: design the water turbine that a kind of water can be converted to mechanical energy, to reduce the water loss of energy, improve conversion efficiency and reduce the requirement of building geologic condition to installing.

The utility model is to realize its purpose like this: this water turbine is by casing, be supported on blade type runner in the chassis cavity by rotating shaft and bearing structure, the support of supporting casing constitutes, the upstream face of the blade of runner is the plane, the maximum back rake angle β of radial plane that the cylindrical rotor of runner is departed from this plane is no more than 5 °, the back side of blade is arc shaped surface, be between the outer end of blade and chassis cavity wall and closely cooperate, the tangent plane of its this end arc shaped surface and the angle α between upstream face are 55 °-65 °, water intake on the casing and water outlet are arranged on a side of dividing the plane equally of dividing the cylinder chassis cavity equally, chassis cavity forms vacuum chamber and abdominal cavity during work, and the overflow section of water intake and water outlet is long-pending all long-pending big than the overflow section of vacuum chamber.

Basis is practical can also to realize purpose like this: casing is divided into two-part, and sealing gasket is housed therebetween, locks by bolt arrangement each other.

Be with convex-concave structure between casing of the present utility model two ends internal chamber wall and the two ends of rotor and be sealed and matched.

Owing to the utlity model has the said structure design, during installation, only need to load onto penstock and stopping brake at water intake, the vacuum chamber part that current enter chassis cavity from water intake, blade promote the runner rotation under current gravity and percussion, can convert water to mechanical energy, drive machine work by rotating shaft, water flows out from water outlet then, enters the draft tube that is provided with when installing and tail water groove and drains.Current enter in the vacuum chamber, form siphonage, thereby form working procedure continuously, and water can be converted to mechanical energy, carry out work done.Owing to reasonable in design, overcome the shortcoming of water bucket type and impact etc., install and use Shi Buxu jet pipe is set, do not need huge spiral case, so the water loss of energy reduces greatly, has improved water greatly and can be converted to the efficient of mechanical energy, and reduced the restriction to the installation addresses condition.

Further specified below in conjunction with drawings and Examples, but be not limited only to this.

Fig. 1 is a structural representation of the present utility model, analyses and observe by Fig. 2 B-B;

Fig. 2 is an A-A cross-sectional schematic of the present utility model.

As shown in FIG., this water turbine is by casing 1, be supported on blade type runner 2 in casing 1 inner chamber by rotating shaft 5 and bearing structure 9, the support 8 of supporting casing 1 constitutes, the upstream face 3a of the blade 3 of runner 2 is the plane, the maximum back rake angle β of radial plane that the cylindrical rotor 2a of runner 2 is departed from this plane is no more than 5 °, blade 3 is for being distributed in eight or multi-disc on the rotor 2a outer wall, so-called radial plane is meant the plane by the crossing bus of the outer wall of the upstream face 3a of the shaft axis of the rotating shaft 5 of cylindrical rotor 2a and blade 3 and rotor 2a, the upstream face 3a of optimal design is the extension of radial plane, so that can accept the effect of current effectively, and its water can be converted to mechanical energy, rotor 2a can be designed to solid, also can be designed to hollow cylindrical body (not drawing), but it is sealed at both ends, and water does not enter in this rotor 2a inner chamber.With the upstream face 3a opposing backside surface 3d of blade 3 be arc shaped surface, be between the outer end of blade 3 and casing 1 internal chamber wall and closely cooperate, form vacuum chamber when guaranteeing work, and under flow action, runner 2 can rotate to be flexibly good.The tangent plane of the arc shaped surface of blade 3 outer ends and the angle α of upstream face 3a are 55 °-65 °, and too conference influences water energy conversion efficiency.The upstream face of blade 3 can be planes such as rectangular, trapezoidal, triangle, and that its bi-side can be made into is trapezoidal, rectangular, triangle or cambered surface.Water intake 6 on the casing 1 and water outlet 7 depart from a side setting of dividing the plane equally of dividing the cylinder chassis cavity equally, form vacuum chamber 1a and abdominal cavity 1b during work in the casing 1, the overflow section of water intake 6 and water outlet 7 is long-pending all long-pending big than the overflow section of vacuum chamber 1a, minimum should guarantee to equate, when guaranteeing work in the tail water groove and the gas in the draft tube not suck-back go among the vacuum chamber 1a, can conversion efficiency to improve rotational speed of water turbine and water.Casing 1 is divided into two parts, its structure is identical, flexible gasket is housed between two-part, each other by bolt arrangement 11 lockings, be sealed and matched with convex-concave structure 10 formation between casing 1 two ends internal chamber wall and the rotor 2a two ends, be to design respectively on these two parts circular convex tendon and the groove that cooperatively interacts arranged, to increase mutual sealing.When using on-the-spot the installation; installing penstock and stopping brake on water intake 6; dress connection place will keep sealing; installing draft tube and tail water groove on the water outlet 7; the tail water groove also can adopt the natural water beach, 1 meter of deep water position, the depth of water should guarantee to reach flow when penstock less than draft tube in during flow or when shutdown; gas is not by suck-back in the draft tube, and the water in the tail water groove is not collided blade and reduces the flowing water noise by back suction.During production, note the sealing in the casing, the siphon effect in the vacuum chamber 1a that forms during with assurance work.This water turbine is compared with impact type, has reduced structures such as jet pipe during installation, no jet requirement, thus reducing the water loss of energy, the water that flies to escape in the abdominal cavity 1b is few, and rotational speed of water turbine can improve greatly, stable working.Compare with impact, reduced spiral case, reduced the water loss of energy, therefore, having improved water greatly can conversion efficiency.In addition, water turbine is installed and can not built a dam, and has reduced the restriction to geologic condition.The bearing structure 9 of supporting shaft 5 is a plain bearing, is loaded on the two ends of casing 1.This water turbine can be made impact type, impact usefulness, can change the energy of impact, counterattack simultaneously, produces siphon effect, successfully carries out work, and this machine also can make vertical structure, structure and horizontal in full accord, and working procedure, principle are also in full accord.Support 8 makes with the equipped frame of casing 1 also passable, and support 8 can connect with screw or welding manner with 1 of casing.

Claims

1, a kind of water turbine that water can be converted to mechanical energy, this water turbine is by casing (1), be supported on blade type runner (2) in casing (1) inner chamber by rotating shaft (5) and bearing structure (9), the support (8) of supporting casing (1) constitutes, it is characterized in that: the upstream face (3a) of the blade (3) of runner (2) is the plane, the maximum back rake angle β of radial plane that the cylindrical rotor (2a) of runner (2) is departed from this plane is no more than 5 °, the back side (3d) of blade (3) is arc shaped surface, be between the outer end of blade (3) and casing (1) internal chamber wall and closely cooperate, angle α between the tangent plane of its this end arc shaped surface and upstream face (3a) is 55 °-65 °, water intake (6) on the casing (1) and water outlet (7) are arranged on a side of dividing the plane equally of dividing cylinder casing (1) inner chamber equally, casing during work (1) inner chamber forms vacuum chamber (1a) and abdominal cavity (1b), the overflow section of water intake (6) and water outlet (7) is long-pending all long-pending big than the overflow section of vacuum chamber (1a), and minimum should guarantee to equate.

2, water turbine according to claim 1 is characterized in that: casing (1) is divided into two-part, and sealing gasket (4) is housed therebetween, each other by bolt arrangement (11) locking.

3, water turbine according to claim 1 and 2 is characterized in that: be with convex-concave structure (10) between casing (1) two ends internal chamber wall and rotor (2a) two ends and be sealed and matched.