CN207004711U - It is a kind of that slurry tubular turbine is determined using non-axis transmission - Google Patents

Abstract

The utility model discloses a fixed-pitch tubular water turbine adopting shaftless transmission, which comprises a guide vane hub body coaxially arranged inside a water inlet pipe, and fixed guide vanes and guide vanes are evenly distributed along the circumferential direction of the guide vane hub body. The runner hub body is coaxially set on the extended shaft of the hub body, and a circle of runner blades is evenly distributed along the circumference of the runner hub body. The outer rim of the runner blades is coaxially provided with an annular gear ring sleeve. The outer surface of the ring sleeve is processed with a gear ring, the gear ring on the gear ring sleeve cooperates with the output mechanism, the end of the extended shaft of the guide vane hub body is provided with a water discharge cone, the water discharge cone is located inside the draft tube, the inlet pipe and the tail pipe The water pipes are coaxially arranged on opposite sides of the gear ring sleeve. The runner of the water turbine is connected with the rotor of the generator by a gear transmission mechanism, which simplifies the overall structure of the water turbine and reduces installation and maintenance costs.

Description

A fixed-pitch tubular water turbine with shaftless transmission

technical field

The utility model belongs to the technical field of water conservancy and hydropower engineering equipment, and relates to a fixed-pitch tubular water turbine adopting shaftless transmission.

Background technique

In the structure of the traditional tubular hydroelectric generator set, because the runner of the hydro turbine needs to be directly connected with the rotor of the generator through the transmission shaft, it is usually necessary to design a separate space for placing the generator in the flow channel of the hydro turbine (such as the bulb body, shaft) , or set up an S-shaped turning draft tube to lead the drive shaft out of the flow channel to connect with the generator rotor, resulting in a complex overall pipeline structure and internal flow channel structure of the turbine and a large footprint. However, in the development of small hydropower in rural areas and the utilization of hydropower resources in ultra-low head open channel channels, hydroelectric generating units usually have the characteristics of small installed capacity and compact space structure of the workshop, so the traditional tubular hydroturbine structure is applied The development of water energy in small hydropower stations or micro hydropower stations will cause a large increase in the civil construction costs of the plant, unreasonable overall structure of the turbine, and increased installation and maintenance equipment costs.

Utility model content

The purpose of the utility model is to provide a fixed-pitch tubular water turbine with shaftless transmission. The turbine runner and the generator rotor are connected by a gear transmission mechanism, which simplifies the overall structure of the water turbine and reduces installation and maintenance costs.

The technical scheme adopted by the utility model is that a fixed-pitch tubular water turbine adopting shaftless transmission includes a guide vane hub body coaxially arranged inside the water inlet pipe, and fixed blades are uniformly distributed along the circumference of the guide vane hub body The guide vane, the runner hub body is coaxially set on the extended shaft of the guide vane hub body, and a circle of runner blades is evenly distributed along the circumference of the runner hub body, and the rim of the runner blade is coaxially provided with an annular Gear ring sleeve, the outer surface of the gear ring sleeve is processed with a gear ring, the gear ring on the gear ring sleeve cooperates with the output mechanism, the end of the extended shaft of the guide vane hub body is provided with a water discharge cone, and the water discharge cone is located inside the draft tube , the water inlet pipe and the draft pipe are coaxially arranged on opposite sides of the gear ring sleeve.

The utility model is also characterized in that,

Wherein the fixed guide vane is fixedly connected with the water inlet pipe and the guide vane hub body respectively to form a whole.

The two ends of the extended shaft of the guide vane hub body are provided with deep groove ball bearings supporting the runner hub body respectively, and the deep groove ball bearings are coaxial with the extended shaft of the guide vane hub body.

Wherein the runner blades are respectively fixedly connected with the hub body of the runner and the gear ring sleeve as a whole.

Angular contact ball bearing a is provided at the junction of the gear ring sleeve and the water inlet pipe, the outer ring of the angular contact ball bearing a is positioned by the circlip a, the circlip a is embedded on the inner wall of the water inlet pipe, and the angular contact ball bearing a The inner ring is installed on one side of the gear ring sleeve with tight fit, and the metal frame lip seal a is coaxially set on one side of the gear ring sleeve. The metal frame lip seal a is installed on the outer side of the angular contact ball bearing a and is located in the Between the water pipe and the gear ring;

Among them, the angular contact ball bearing a, the elastic retaining ring a, and the metal frame lip seal a are all arranged coaxially with the water inlet pipe.

Angular contact ball bearing b is provided at the junction of the gear ring sleeve and the draft tube, the outer ring of the angular contact ball bearing b is positioned by the elastic retaining ring b, the elastic retaining ring b is embedded on the inner wall of the draft tube, and the angular contact ball bearing b The inner ring of the inner ring is installed on the other side of the gear ring with a tight fit, and the other side of the gear ring is coaxially fitted with a metal skeleton lip seal b, and the metal skeleton lip seal b is installed on the outside of the angular contact ball bearing b And it is located between the draft tube and the gear ring;

Among them, the angular contact ball bearing b, the elastic retaining ring b, and the metal frame lip seal b are all arranged coaxially with the draft tube.

Wherein the center of the water discharge cone is coaxially provided with a threaded hole, the end of the extending shaft of the guide vane hub body is processed with external threads, and the end of the extending shaft of the guide vane hub body is connected with the water discharge cone by threads.

Wherein the output mechanism includes a torque output shaft, a torque output gear is sleeved on the torque output shaft, and the torque output gear meshes with the ring gear on the gear ring sleeve.

The beneficial effect of the utility model is that the fixed-pitch tubular turbine provided by the utility model adopts shaftless transmission with few flow parts and compact internal structure, and there is no need for a direct connection between the turbine runner and the generator rotor, which solves the problem of It solves the problem that the existing tubular turbine needs to use the direct connection between the drive shaft and the generator rotor, which causes the complex structure of the power station pipeline and the internal flow channel of the turbine, and occupies a large space. At the same time, the water turbine in the utility model has no cavitation cavitation in the blade top gap, and the service life of the runner blades will be greatly improved.

Description of drawings

Fig. 1 is a structural schematic diagram of a fixed-pitch tubular water turbine adopting shaftless transmission of the utility model;

Fig. 2 is a partial enlarged view of A in Fig. 1 .

In the figure, 1. Inlet pipe, 2. Guide vane hub body, 3. Fixed guide vane, 4. Runner hub body, 5. Runner blade, 6. Gear ring sleeve, 7. Drain cone, 8. Draft tube , 9. Deep groove ball bearing, 10. Angular contact ball bearing a, 11. Retaining ring a, 12. Metal frame lip seal a, 13. Angular contact ball bearing b, 14. Retaining ring b, 15. Metal Skeleton lip seal b, 16. Torque output shaft, 17. Torque output gear.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model is a fixed-pitch tubular water turbine adopting shaftless transmission. The structure is shown in Figure 1. A circle of fixed guide vanes 3 is distributed, and the runner hub body 4 is coaxially set on the extended shaft of the guide vane hub body 2, and a circle of runner blades 5 is uniformly distributed along the circumference of the runner hub body 4, and the runner blades 5 An annular gear ring sleeve 6 is arranged coaxially outside the wheel rim, and the outer surface of the gear ring sleeve 6 is processed with a gear ring. The gear ring gear on the gear ring sleeve 6 cooperates with the output mechanism. There is a water discharge cone 7 at the top, and the water discharge cone 7 is located inside the draft tube 8, and the water inlet pipe 1 and the draft tube 8 are coaxially arranged on opposite sides of the gear ring sleeve 6.

Wherein the fixed guide vane 3 is fixedly connected with the water inlet pipe 1 and the guide vane hub body 2 respectively (the fixed guide vane 3 is located between the inner wall of the water inlet pipe 1 and the guide vane hub body 2).

The two ends of the extended shaft of the guide vane hub body 2 are provided with deep groove ball bearings 9 supporting the runner hub body 4 respectively, and the deep groove ball bearings 9 are coaxial with the extended shaft of the guide vane hub body 2 .

Wherein the runner blades 5 are respectively fixedly connected with the runner hub body 4 and the gear ring sleeve 6 as a whole.

As shown in Figure 2, an angular contact ball bearing a10 is provided at the junction of the gear ring sleeve 6 and the water inlet pipe 1, and the outer ring of the angular contact ball bearing a10 is positioned by the circlip a11 (the circlip a11 acts as a positioning and clamping function). , the elastic retaining ring a11 is embedded on the inner wall of the water inlet pipe 1, and the inner ring of the angular contact ball bearing a10 is installed on one side of the gear ring sleeve 6 with a tight fit (the inner ring of the angular contact ball bearing a10 follows the gear ring when the turbine is running. sleeve 6 rotates, the outer ring of the angular contact ball bearing a10 remains stationary), one side of the gear ring sleeve 6 is coaxially fitted with a metal frame lip seal a12, and the metal frame lip seal a12 is installed on the outside of the angular contact ball bearing a10 (The metal frame lip seal a12 prevents the leakage of lubricating oil of the angular contact ball bearing a10 and the entry of sundries and dust into the angular contact ball bearing a10, which acts as a seal) and is located between the water inlet pipe 1 and the gear ring sleeve 6; the angular contact ball The bearing a10 acts as a fixed support between the water inlet pipe 1 and the gear collar 6; the angular contact ball bearing a10, the elastic retaining ring a11, and the metal skeleton lip seal a12 are coaxially arranged with the water inlet pipe 1.

Angular contact ball bearing b13 is provided at the junction of gear ring sleeve 6 and draft tube 8, and the outer ring of angular contact ball bearing b13 is positioned by elastic retaining ring b14 (the elastic retaining ring b14 acts as a positioning and clamping function), and the elastic retaining ring b14 Embedded on the inner wall of the draft tube 8, the inner ring of the angular contact ball bearing b13 is installed on the other side of the gear ring sleeve 6 with a tight fit (the inner ring of the angular contact ball bearing b13 rotates with the gear ring sleeve 6 when the turbine is running, The outer ring of the angular contact ball bearing b13 remains stationary), the other side of the gear ring sleeve 6 is coaxially fitted with a metal frame lip seal b15, and the metal frame lip seal b15 is installed on the outside of the angular contact ball bearing b13 (the metal frame The lip seal b15 can prevent the leakage of lubricating oil of the angular contact ball bearing b13 and the entry of sundries and dust into the angular contact ball bearing b13, which acts as a seal) and is located between the draft tube 8 and the gear ring sleeve 6; the angular contact ball bearing b13 It acts as a fixed support between the draft tube 8 and the gear ring sleeve 6; at the same time, the angular contact ball bearing a10 and the angular contact ball bearing b13 also undertake the rotating parts composed of the runner blade 5, the runner hub body 4 and the gear ring sleeve 6 radial and axial loads. Among them, the angular contact ball bearing b13, the elastic retaining ring b14, and the metal frame lip seal b15 are all arranged coaxially with the draft tube 8 .

Wherein the center of the drain cone 7 is coaxially provided with a threaded hole, the end of the extending shaft of the guide vane hub body 2 is processed with external threads, and the end of the extending shaft of the guide vane hub body 2 and the drain cone 7 are threaded connect. The water discharge cone 7 acts as a compression to the deep groove ball bearing 9, and also acts as a guide to the water flow.

The output mechanism includes a torque output shaft 16, on which a torque output gear 17 is sleeved, and the torque output gear 17 meshes with the ring gear on the gear collar 6.

The working mode of the fixed-pitch tubular water turbine adopting shaftless transmission in the utility model is as follows: the water flow enters the water turbine from the water inlet pipe 1, and hits the runner blade 5 at a certain angle through the guidance of the fixed guide vane 3 and generates a push. The rotating torque of the runner blade 5, because the runner blade 5 and the gear ring sleeve 6 are welded as a whole, so the runner blade 5 does not have a tip clearance, and will not be damaged by cavitation erosion in the tip clearance. When the runner blade 5 rotates, it drives the gear ring sleeve 6 to rotate together, and then the torque received by the runner blade 5 is transmitted to the torque output gear 17 through the external meshing mode between the gear ring sleeve 6 and the torque output gear 17, and the torque output gear 17 Then, the torque is transmitted to the torque output shaft 16 through the key connection to output the torque. The torque output shaft 16 can be directly connected to the generator for power generation, or connected to a first-stage gearbox for speed-up power generation.

The feature of the utility model is a fixed-pitch tubular water turbine with shaftless transmission: the device uses gear transmission to output the torque of the runner, and does not use the transmission shaft to directly connect the turbine runner with the generator rotor. The method greatly reduces the axial size of the entire unit, simplifies the structure of the turbine, and is very suitable for the development of hydropower in rural small hydropower stations or micro-hydropower stations.

Claims (8)

1. a kind of determine slurry tubular turbine using non-axis transmission, it is characterised in that：Including being co-axially located in water inlet pipe (1) The stator hub body (2) in portion, fixed guide vane (3) is evenly distributed with along the circumference of stator hub body (2), stator hub body (2) Coaxial sleeve is equipped with runner boss body (4) on outrigger shaft, and a circle runner bucket is evenly distributed with along the circumference of runner boss body (4) (5) the gear ring set (6) of annular, is coaxially provided with outside the wheel rim of runner bucket (5), the outer surface processing of gear ring set (6) is with teeth Enclose, the gear ring on the gear ring set (6) coordinates with output mechanism, and the overhanging shaft end of stator hub body (2) is provided with draft cone (7), draft cone (7) is located at draft tube (8) inside, and water inlet pipe (1) is co-axially located at the phase of gear ring set (6) with draft tube (8) To both sides.

A kind of slurry tubular turbine is determined using non-axis transmission 2. according to claim 1, it is characterised in that：It is described solid Determine stator (3) respectively with water inlet pipe (1) and stator hub body (2) is affixed is integrally formed.

A kind of slurry tubular turbine is determined using non-axis transmission 3. according to claim 1, it is characterised in that：It is described to lead The both ends of the outrigger shaft of impeller boss body (2) are respectively equipped with the deep groove ball bearing (9) to be played a supportive role to runner boss body (4), deep The outrigger shaft of ditch ball bearing (9) and stator hub body (2) is coaxial.

A kind of slurry tubular turbine is determined using non-axis transmission 4. according to claim 1, it is characterised in that：Described turn Impeller blade (5) fixes as one with runner boss body (4), gear ring set (6) respectively.

A kind of slurry tubular turbine is determined using non-axis transmission 5. according to claim 1, it is characterised in that：The tooth The joint of wheel ring set (6) and water inlet pipe (1) is provided with angular contact ball bearing a (10), and angular contact ball bearing a (10) outer ring passes through Circlip a (11) is positioned, and circlip a (11) on water inlet pipe (1) inwall, adopt by angular contact ball bearing a (10) inner ring The side of gear ring set (6) is arranged on tight fit, the side also coaxial sleeve of gear ring set (6) is equipped with metallic framework lip packing A (12), metallic framework lip packing a (12) are installed in angular contact ball bearing a (10) outside and are located at water inlet pipe (1) and gear Between ring set (6)；

The angular contact ball bearing a (10), circlip a (11), metallic framework lip packing a (12) are same with water inlet pipe (1) Axle is set.

A kind of slurry tubular turbine is determined using non-axis transmission 6. according to claim 1, it is characterised in that：The tooth The junction of wheel ring set (6) and draft tube (8) is provided with angular contact ball bearing b (13), and angular contact ball bearing b (13) outer ring passes through Circlip b (14) is positioned, and circlip b (14) is on the inwall of draft tube (8), angular contact ball bearing b (13) inner ring The opposite side of gear ring set (6) is arranged on using tight fit, the opposite side also coaxial sleeve of gear ring set (6) is equipped with metallic framework lip Shape sealing b (15), metallic framework lip packing b (15) are installed in angular contact ball bearing b (13) outside and are located at draft tube (8) Between gear ring set (6)；

The angular contact ball bearing b (13), circlip b (14), metallic framework lip packing b (15) are same with draft tube (8) Axle is set.

A kind of slurry tubular turbine is determined using non-axis transmission 7. according to claim 1, it is characterised in that：It is described to let out Screwed hole is coaxially offered at the center of water cone (7), the end of the outrigger shaft of the stator hub body (2) is machined with external screw thread, The overhanging shaft end of the stator hub body (2) is connected through a screw thread with draft cone (7).

A kind of slurry tubular turbine is determined using non-axis transmission 8. according to claim 1, it is characterised in that：It is described defeated Going out mechanism includes torque output shaft (16), and torque output gear (17), torque output gear are set with torque output shaft (16) (17) engaged with the gear ring on the gear ring set (6).