Adjustable nozzle mechanism of radial turbo expander

Abstract

The adjustable nozzle mechanism of the radial turbo expander comprises a base plate, the top of the base plate is rotationally connected with a positioning plate through an opening, a plurality of first sliding rods are fixedly installed at the top of the positioning plate, the first sliding rods are annularly arranged, and the surfaces of the first sliding rods are slidably connected with nozzle blades. By arranging the supporting ring, the supporting base and the balls, the bottoms of the nozzle blades do not make contact with the top of the positioning disc, the effect of reducing friction force borne by the nozzle blades in the adjusting process is achieved, meanwhile, the effect of protecting the multiple nozzle blades can be achieved by arranging the protection frame, and the service life of the nozzle blades is prolonged. When the nozzle blade needs to be dismantled, the two bolts can be rotated to enable the bolts to be separated from the bolt grooves, at the moment, the effect of dismantling the protection frame can be achieved, after the protection frame is dismantled, the limiting strips stop limiting the nozzle blade, and then the effect of conveniently dismantling the nozzle blade is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine expanders, in particular to an adjustable nozzle mechanism of a radial turbine expander. Background Art

[0002] A turboexpander is a device that uses a certain pressure of gas to expand adiabatically inside the machine to do work externally and consume the internal energy of the gas itself to achieve the purpose of refrigeration. It is a key component necessary for air separation equipment, natural gas liquefaction separation equipment, and low-temperature crushing equipment to obtain cold capacity. It is the core to ensure the stable operation of the entire set of equipment. Among them, the turboexpander nozzle is a key component of the turboexpander. Its main function is to form an efficient flow channel for accelerating the working fluid and guide the working fluid into the blade stationary component of the turbine moving blade. In radial turbines, the turboexpander nozzle can also be called a guide vane;

[0003] The bottom of the turbine expander nozzle in the prior art is often in contact with the top of the positioning plate, causing the nozzle to rub against the top of the positioning plate when being adjusted, which accelerates the wear of the nozzle. In addition, during the use of the expander, water vapor often condenses on the nozzle, and in a low temperature environment, ice will condense on the surface of the nozzle, thereby affecting the normal use of the nozzle. Therefore, it is necessary to design a new radial turbine expander adjustable nozzle mechanism to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an adjustable nozzle mechanism for a radial turbine expander to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable nozzle mechanism of a radial turbine expander, comprising a chassis, the top of the chassis is rotatably connected to a positioning plate by opening an opening, a first slide bar is fixedly installed on the top of the positioning plate, and a plurality of first slide bars are arranged in an annular shape, a nozzle blade is slidably connected to the surface of the first slide bar, a support ring is fixedly installed on the surface of the first slide bar and below the nozzle blade, a second slide bar is fixedly installed on the top of the positioning plate, and a plurality of second slide bars are arranged in an annular shape, the top end of the second slide bar passes through the nozzle blade and extends to the outside of the nozzle blade, and a sliding opening for use with the second slide bar is opened on the top of the nozzle blade;

[0006] A support seat is fixedly installed at the bottom of the nozzle blade, and a ball is slidably connected to the bottom of the support seat through a slot, and the bottom of the ball fits with the top of the positioning plate.

[0007] Preferably, a protection frame is provided on the top of the chassis, and a limiting bar used in conjunction with the first sliding rod is fixedly installed on the top of the inner cavity of the protection frame, and a plurality of limiting bars are provided in a ring shape.

[0008] Preferably, both sides of the protective frame are rotatably connected with bolts through brackets, the bottom ends of the bolts penetrate the chassis and extend to the inside of the chassis, and both sides of the top of the chassis are provided with bolt grooves for use with the bolts.

[0009] Preferably, an electric heating ring used in conjunction with the nozzle blades is fixedly installed on the top of the inner cavity of the protection frame.

[0010] Preferably, a driving groove is provided on the front side of the top of the chassis.

[0011] Preferably, a rotating member used in conjunction with the positioning plate is provided at the bottom of the inner cavity of the driving groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The radial turbine expander has an adjustable nozzle mechanism. By providing a support ring, a support seat and a ball, the bottom of the nozzle blade is not in contact with the top of the positioning plate, thereby reducing the friction force on the nozzle blade during the adjustment process. At the same time, by providing a protective frame, the effect of protecting multiple nozzle blades can be achieved. When the nozzle blade needs to be removed, the two bolts can be rotated to disengage the bolts from the bolt grooves. At this time, the protective frame can be removed. After the protective frame is removed, the limit bar stops limiting the nozzle blade, thereby facilitating the removal of the nozzle blade.

[0014] 2. The radial turbine expander has an adjustable nozzle mechanism. By setting an electric heating ring, the electric heating ring can heat the inner side of the protective frame. The electric heating ring heats the inner side of the protective frame to prevent the surface of the nozzle blades from freezing, thereby avoiding the situation where the surface of the nozzle blades freezes and affects the normal operation of the nozzle blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the nozzle blade, bolt slot and rotating part of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the first sliding rod, the support ring and the second sliding rod of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the limit strip, bolts and electric heating ring of the utility model;

[0019] Figure 5 This is a schematic diagram of the sliding port, support seat and ball structure of the utility model.

[0020] In the figure: 1. chassis; 2. positioning plate; 3. first slide bar; 4. support ring; 5. nozzle blade; 6. second slide bar; 7. slide mouth; 8. support seat; 9. ball bearing; 10. protection frame; 11. limit strip; 12. bolt; 13. bolt groove; 14. electric heating ring; 15. drive groove; 16. rotating part. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] Please refer to Figure 1-5 As shown, the utility model provides an adjustable nozzle mechanism of a radial turbine expander, comprising a chassis 1, the top of the chassis 1 is rotatably connected to a positioning disk 2 by opening, a driving groove 15 is provided on the front side of the top of the chassis 1, a rotating member 16 used in conjunction with the positioning disk 2 is provided at the bottom of the inner cavity of the driving groove 15, a first slide bar 3 is fixedly installed on the top of the positioning disk 2, and a plurality of first slide bars 3 are arranged in an annular shape, a nozzle blade 5 is slidably connected to the surface of the first slide bar 3, a support ring 4 is fixedly installed on the surface of the first slide bar 3 and located below the nozzle blade 5, a second slide bar 6 is fixedly installed on the top of the positioning disk 2, and a plurality of second slide bars 6 are arranged in an annular shape, the top end of the second slide bar 6 passes through the nozzle blade 5 and extends to the outside of the nozzle blade 5, and a sliding opening 7 used in conjunction with the second slide bar 6 is provided on the top of the nozzle blade 5;

[0024] Specifically, a support seat 8 is fixedly installed at the bottom of the nozzle blade 5, and a ball 9 is slidably connected to the bottom of the support seat 8 through a groove. The bottom of the ball 9 fits against the top of the positioning plate 2. By arranging the support ring 4, the support seat 8 and the ball 9, the bottom of the nozzle blade 5 does not contact the top of the positioning plate 2, thereby achieving the effect of reducing the friction force on the nozzle blade 5 during the adjustment process.

[0025] Specifically, a protective frame 10 is provided on the top of the chassis 1, and a limiting strip 11 used in conjunction with the first slide bar 3 is fixedly installed on the top of the inner cavity of the protective frame 10, and a plurality of limiting strips 11 are arranged in a ring shape. Bolts 12 are rotatably connected to both sides of the protective frame 10 through a bracket, and the bottom ends of the bolts 12 penetrate the chassis 1 and extend to the interior of the chassis 1. Bolt grooves 13 used in conjunction with the bolts 12 are provided on both sides of the top of the chassis 1. By setting the limiting strip 11, the bottom of the limiting strip 11 is in contact with the top of the first slide bar 3, thereby achieving the effect of reducing the friction force on the top of the nozzle blade 5. At the same time, by setting the protective frame 10, the effect of protecting multiple nozzle blades 5 can be achieved. When the nozzle blade 5 needs to be removed, the two bolts 12 can be rotated to disengage the bolts 12 from the bolt grooves 13. At this time, the effect of removing the protective frame 10 can be achieved. After the protective frame 10 is removed, the limiting strip 11 stops limiting the nozzle blade 5, thereby achieving the effect of facilitating the removal of the nozzle blade 5.

[0026] Among them: an electric heating coil 14 used in conjunction with the nozzle blade 5 is fixedly installed on the top of the inner cavity of the protection frame 10. By setting the electric heating coil 14, the electric heating coil 14 can heat the inner side of the protection frame 10. The electric heating coil 14 heats the inner side of the protection frame 10 to prevent the surface of the nozzle blade 5 from icing.

[0027] Working principle: The utility model is an adjustable nozzle mechanism for a radial turbine expander. By setting a support ring 4, a support seat 8 and a ball 9, the bottom of the nozzle blade 5 is not in contact with the top of the positioning plate 2, thereby achieving the effect of reducing the friction force on the nozzle blade 5 during the adjustment process. By setting a limit bar 11, the bottom of the limit bar 11 is in contact with the top of the first slide bar 3, thereby achieving the effect of reducing the friction force on the top of the nozzle blade 5. At the same time, by setting a protective frame 10, the effect of protecting multiple nozzle blades 5 can be achieved. When the nozzle blade 5 needs to be removed, it can be removed through By rotating the two bolts 12, the bolts 12 are disengaged from the bolt grooves 13, and the protective frame 10 can be removed. After the protective frame 10 is removed, the limit strip 11 stops limiting the nozzle blade 5, thereby achieving the effect of facilitating the removal of the nozzle blade 5, and by providing the electric heating coil 14, the electric heating coil 14 can heat the inner side of the protective frame 10. The electric heating coil 14 heats the inner side of the protective frame 10 to prevent the surface of the nozzle blade 5 from freezing, thereby avoiding the situation where the surface of the nozzle blade 5 freezes and affects the normal operation of the nozzle blade 5.

[0028] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable nozzle mechanism for a radial turbine expander, comprising a chassis (1), characterized in that: The top of the chassis (1) is rotatably connected to a positioning plate (2) by opening an opening, a first slide bar (3) is fixedly installed on the top of the positioning plate (2), and a plurality of first slide bars (3) are arranged in an annular shape, a nozzle blade (5) is slidably connected to the surface of the first slide bar (3), a support ring (4) is fixedly installed on the surface of the first slide bar (3) and located below the nozzle blade (5), a second slide bar (6) is fixedly installed on the top of the positioning plate (2), and a plurality of second slide bars (6) are arranged in an annular shape, the top end of the second slide bar (6) passes through the nozzle blade (5) and extends to the outside of the nozzle blade (5), and a sliding opening (7) used in conjunction with the second slide bar (6) is opened on the top of the nozzle blade (5); A support seat (8) is fixedly mounted on the bottom of the nozzle blade (5); a ball (9) is slidably connected to the bottom of the support seat (8) via a slot; and the bottom of the ball (9) fits with the top of the positioning plate (2).

2. The adjustable nozzle mechanism of a radial turbine expander according to claim 1, characterized in that: A protective frame (10) is arranged on the top of the chassis (1), and a limiting strip (11) used in conjunction with the first slide bar (3) is fixedly installed on the top of the inner cavity of the protective frame (10), and a plurality of limiting strips (11) are arranged in a ring shape.

3. The adjustable nozzle mechanism of a radial turbine expander according to claim 2, characterized in that: Both sides of the protection frame (10) are rotatably connected with bolts (12) through brackets, the bottom ends of the bolts (12) penetrate the chassis (1) and extend into the interior of the chassis (1), and both sides of the top of the chassis (1) are provided with bolt grooves (13) for use with the bolts (12).

4. The adjustable nozzle mechanism of a radial turbine expander according to claim 2, characterized in that: An electric heating coil (14) for use in conjunction with the nozzle blades (5) is fixedly mounted on the top of the inner cavity of the protection frame (10).

5. The adjustable nozzle mechanism of a radial turbine expander according to claim 1, characterized in that: A driving groove (15) is provided on the front side of the top of the chassis (1).

6. The adjustable nozzle mechanism of a radial turbine expander according to claim 5, characterized in that: A rotating member (16) used in conjunction with the positioning plate (2) is provided at the bottom of the inner cavity of the driving groove (15).

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