CN216429779U - High-speed cantilever type axial flow turbine organic working medium expander - Google Patents

Abstract

The utility model relates to an industrial waste heat recovery power generation technical field, concretely relates to high-speed cantilever type axial compressor turbine organic medium expander, including the spiral case, the front bezel, high speed motor, the rotor assembly, output end housing, nozzle ring seat, the nozzle cascade, exhaust water conservancy diversion portion and air intake water conservancy diversion portion, high speed motor has the main shaft, be provided with the rotor assembly on the main shaft, spiral case and output end housing are all installed on high speed motor, nozzle ring seat and front bezel are installed on the spiral case, the nozzle cascade is installed on nozzle ring seat, air intake water conservancy diversion portion installs on the nozzle cascade, exhaust water conservancy diversion portion installs on the output end housing, form the inlet channel between front bezel and the air intake water conservancy diversion portion, form turbine level runner between nozzle cascade and the turbine, spiral case and exhaust water conservancy diversion portion form the exhaust water conservancy diversion way. The expander has small flow, low power, high afterheat utilizing rate and excellent air tightness.

Description

High-speed cantilever type axial flow turbine organic working medium expander

Technical Field

The utility model relates to an industrial waste heat recovery power generation technical field, concretely relates to high-speed cantilever type axial compressor turbine organic working medium expander.

Background

In the field of Organic Rankine Cycle (ORC) power generation, the efficiency of an organic working medium expansion machine has a large influence on the system efficiency, and the system efficiency can be effectively improved by improving the efficiency of the expansion machine.

At present, a large-flow high-power expansion machine is developed rapidly, the efficiency of the whole machine is improved greatly, and for the expansion machine with small-flow low-power requirement, if a traditional large-flow high-power expansion machine structure is continuously adopted, the working medium drives a turbine to do work to a generator to output electric energy, and the efficiency of the whole machine is reduced by about 10% due to the loss of an air inlet and exhaust shell, the loss of an expansion machine bearing, the loss of a coupler, the loss of a gear box and the like in the process, which is very unfavorable for an ORC system.

Therefore, the problem that the existing organic working medium expander which meets the requirements of small flow, low power, high waste heat utilization rate and good air tightness needs to be solved urgently is made.

SUMMERY OF THE UTILITY MODEL

To conventional organic working medium expander under low-power requirement of low discharge, inefficiency, the complicated scheduling problem of structure, the utility model provides a high-speed cantilever type axial compressor turbine organic working medium expander.

The utility model provides a high-speed cantilever type axial compressor turbine organic working medium expander, including spiral case, front bezel, high-speed motor, rotor assembly, output end housing, nozzle ring seat, nozzle ring, exhaust water conservancy diversion portion and air inlet water conservancy diversion portion, high-speed motor has the main shaft, be provided with on the main shaft the rotor assembly, the spiral case with output end housing all installs on the high-speed motor, nozzle ring seat with the front bezel is installed on the spiral case, the nozzle ring is installed on the nozzle ring seat, air inlet water conservancy diversion portion installs on the nozzle ring, air outlet water conservancy diversion portion installs on the output covers, the front bezel with form between the air inlet water conservancy diversion portion air inlet channel, the nozzle ring with form turbine level runner between the turbine, the spiral case with air outlet water conservancy diversion portion forms air exhaust runner.

Wherein, the rotor assembly includes seal, pull rod screw, adapter, turbine and locking screw, the seal the pull rod screw the adapter the turbine with locking screw installs in proper order on the main shaft, the quantity of turbine is a plurality of, adjacent two install through wheel hub nestification between the turbine.

Wherein, the both ends of draw bar screw are provided with the screw thread of pitch nonconformity.

The inner ring surface of the nozzle ring is provided with sealing comb teeth, the sealing comb teeth and the hub form labyrinth seal, and the outer edge of the turbine is provided with high and low teeth.

The utility model discloses a high-speed cantilever type axial compressor turbine has working medium expander, through the turbine directly links high-speed motor the output shaft of main shaft, with high-speed motor sharing bearing system saves the inside bearing seat frame of traditional structure, has practiced thrift the space widely for complete machine compact structure, and adopt high-speed motor, the turbine directly gives power transmission for high-speed motor saves tooth case, shaft coupling isotructure, reduces power loss, improves transmission efficiency. And simultaneously reduces the bearing loss. In addition, a cantilever type structure is adopted, the sealing requirement of an air inlet end is omitted, only a sealing body is arranged between the vortex end and the high-speed motor, sealing points are reduced, and the sealing reliability is enhanced. In addition, the gas directly and axially enters a turbine stage runner without turning, so that the work is done in the turbine, and the gas inlet loss is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the high-speed cantilever type axial flow turbine organic working medium expander of the present invention.

Fig. 2 is a schematic view of the flow direction of the air flow in the present invention.

Fig. 3 is a schematic structural view of the rotor assembly of the present invention.

Fig. 4 is a schematic diagram of a turbine stage configuration according to the present invention.

1-volute, 2-front seat, 3-air inlet guide part, 4-locking pull rod, 5-turbine, 6-nozzle ring, 7-adapter, 8-exhaust guide part, 9-pull rod screw, 10-sealing body, 11-output end cover, 12-high speed motor, 13-air inlet channel, 14-turbine stage channel, 15-exhaust channel, 16-main shaft, 17-nozzle ring seat and 18-rotor assembly.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

In the present embodiment, the terms "upper", "lower", "left", "right", "front", "rear", "upper end", "lower end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 4, the present invention provides a high-speed cantilever type axial flow turbine 5 organic working medium expander, including a volute 1, a front seat 2, a high-speed motor 12, a rotor assembly 18, an output end cover 11, a nozzle ring seat 17, a nozzle ring 6, an exhaust flow guide portion 8 and an intake flow guide portion 3, wherein the high-speed motor 12 has a main shaft 16, the rotor assembly 18 is disposed on the main shaft 16, the volute 1 and the output end cover 11 are both mounted on the high-speed motor 12, the nozzle ring seat 17 and the front seat 2 are mounted on the volute 1, the nozzle ring 6 is mounted on the nozzle ring seat 17, the intake flow guide portion 3 is mounted on the nozzle ring 6, the exhaust flow guide portion 8 is mounted on the output end cover 11, the intake flow channel 13 is formed between the front seat 2 and the intake flow guide portion 3, a turbine stage flow channel 14 is formed between the nozzle ring 6 and the turbine 5, the volute 1 and the exhaust guide part 8 form an exhaust flow passage.

Rotor assembly 18 includes seal 10, pull rod screw 9, adapter 7, turbine 5 and locking screw, seal 10 pull rod screw 9 adapter 7 the turbine 5 with locking screw installs in proper order on the main shaft 16, the quantity of turbine 5 is a plurality of, and is a plurality of turbine 5 constitutes the turbine level, adjacent two through the nested installation of wheel hub between the turbine 5.

And threads with inconsistent thread pitches are arranged at two ends of the pull rod screw 9.

The inner ring surface of the nozzle ring 6 is provided with sealing comb teeth, and forms labyrinth seal with the hub, and the outer edge of the turbine 5 is provided with high and low teeth.

The volute 1 has an exhaust passage 15.

In this embodiment, referring to fig. 1, fig. 3 and fig. 4, the seal body 10, the tie rod screw 9, the adapter 7, the turbine 5 and the locking tie rod 4 are sequentially mounted on the main shaft 16 of the high-speed motor 12, and together form the rotor assembly 18; the volute 1 and the output end cover 11 are mounted on the high-speed motor 12; the nozzle ring 6 is mounted on the nozzle ring seat 17, and the nozzle ring seat 17 and the front seat 2 are mounted on the volute 1; the air inlet guide part 3 is arranged on the nozzle ring 6; the exhaust guide part 8 is arranged on the output end cover 11; all stages of turbines 5 between the turbines 5 are installed through hub nesting, and finally all the turbines 5 are tightened to the adapter 7 through the locking pull rod 4, so that torque transmission is achieved.

With reference to fig. 1 and 2, the front seat 2 and the inlet guide form the inlet flow channel 13 therebetween, the nozzle ring 6 and the turbine 5 form a turbine stage flow channel 14, and the volute 1 and the exhaust guide 8 form an exhaust flow channel. Organic working medium airflow directly enters the turbine-stage flow passage 14 through the air inlet flow passage 13 without turning, the airflow is guided by the blades of the nozzle ring 6 and then drives the turbine 5 to apply work to the turbine 5, the turbine 5 obtains kinetic energy and then directly transmits power to the high-speed motor 12 through the adapter 7, and the high-speed motor 12 outputs electric energy outwards. After the organic working medium airflow finishes acting, the organic working medium airflow is discharged through an exhaust runner. The sealing body 10 is arranged between the high-speed motor 12 and the medium flow channel, so that the expansion machine is separated from the high-speed motor 12, and the working medium is prevented from leaking to the high-speed motor 12.

There is the inconsistent screw of pitch at the both ends of pull rod screw 9, the screw in the screw pitch of main shaft 16 is than the screw in the screw pitch of adapter 7 is slightly big, through the pitch difference, will adapter 7 with main shaft 16 locking.

Adapter 7 with adopt the friction to pass between the main shaft 16 to turn round, turbine 5 all adopts the friction to pass to turn round at all levels between the turbine 5, the last turbine 5 of turbine 5 with adapter 7 adopts the friction to pass to turn round.

The hub is provided with a hole shaft matching gear between the turbines 5, the adjacent two stages of turbines 5 are installed together in a matching way through the hub, and the locking pull rod 4 provides axial pretightening force to fix the turbines 5 at all stages, so that a torque transmission mode is simplified, the processing cost is reduced, and the structure is more compact.

The inner ring surface of the nozzle ring 6 is provided with sealing comb teeth to form labyrinth seal with a hub, the outer edge of the turbine 5 is provided with high and low teeth to form labyrinth seal with the inner ring surface of the nozzle ring seat 17, so that gas non-flow passage leakage is reduced, non-flow passage gas flow loss is reduced, and expander efficiency is improved.

In summary, the turbine 5 is directly connected to the output shaft of the spindle 16 of the high-speed motor 12, and shares a bearing system with the high-speed motor 12, so that a bearing seat frame in the traditional structure is omitted, the space is greatly saved, the structure of the whole machine is compact, and by adopting the high-speed motor 12, the turbine 5 directly transmits power to the high-speed motor 12, the structures such as a gear box and a coupler are omitted, the power loss is reduced, and the transmission efficiency is improved. And simultaneously reduces the bearing loss. In addition, a cantilever type structure is adopted, the sealing requirement of an air inlet end is omitted, only a sealing body 10 is arranged between a vortex end and the high-speed motor 12, sealing points are reduced, and the sealing reliability is enhanced. In addition, the gas directly and axially enters the turbine stage runner 14 without turning, and does work in the turbine 5, so that the intake loss is reduced.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (4)

1. The utility model provides a high-speed cantilever type axial compressor turbine organic working medium expander which characterized in that:

the high-speed motor is provided with a main shaft, the rotor assembly is arranged on the main shaft, the volute and the output end cover are both installed on the high-speed motor, the nozzle ring seat and the front seat are installed on the volute, the nozzle ring is installed on the nozzle ring seat, the air inlet flow guide part is installed on the nozzle ring, the air outlet flow guide part is installed on the output end cover, an air inlet flow channel is formed between the front seat and the air inlet flow guide part, a turbine-level flow channel is formed between the nozzle ring and the turbine, and an air outlet flow channel is formed between the volute and the air outlet flow guide part.

2. The high-speed cantilevered axial flow turbine organic working medium expander of claim 1, wherein:

the rotor assembly comprises a sealing body, a pull rod screw, an adapter, a turbine and a locking screw rod, wherein the sealing body is provided with the pull rod screw, the adapter, the turbine and the locking screw rod which are sequentially installed on the main shaft, the number of the turbines is multiple, and the turbines are adjacent to one another and are installed in a hub nesting mode.

3. The high-speed cantilevered axial flow turbine organic working medium expander of claim 2, wherein:

and threads with inconsistent thread pitches are arranged at two ends of the pull rod screw.

4. The high-speed cantilevered axial flow turbine organic working medium expander of claim 3, wherein:

the inner ring surface of the nozzle ring is provided with sealing comb teeth, the sealing comb teeth and the hub form labyrinth seal, and the outer edge of the turbine is provided with high and low teeth.

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