A ring expander

Abstract

The utility model relates to the technical field of expansion machine, especially relates to a ring expansion machine, and the both ends of runner respectively are pasted on the both ends of circular cavity, the runner and circular cavity form annular cavity, and the wheel of runner is provided with piston block for truncating annular cavity section, the inside of shell body is provided with telescopic stopper for truncating into annular cavity, the both ends of circular cavity are provided with the air inlet and exhaust port that are communicated in annular cavity respectively, the air inlet and exhaust port are staggered and set, and the telescopic stopper is set between the air inlet and exhaust port, and the one end of runner towards the air inlet is provided with air hole, and the air hole penetrates to the side surface of runner, when using the utility model, the high pressure gas is synchronous with the gas discharge after the last work of piston block to do work in the air inlet cavity and the piston block is discharged from the exhaust cavity, and does not need to discharge again after resetting, greatly improves the energy efficiency of whole equipment.

Description

Technical Field

[0001] This utility model relates to the field of expander technology, and in particular to a ring expander. Background Technology

[0002] An expander is a machine that converts the energy (mainly pressure energy and thermal energy) of a high-pressure fluid (usually a gas) into mechanical work while simultaneously lowering the gas temperature to obtain energy. It plays a crucial role in energy utilization, refrigeration, and many other fields. Among them, the piston expander, as a special type of gas engine, does not primarily aim to output mechanical work, but rather focuses on obtaining cooling capacity by cooling the gas. Therefore, it is widely used in industrial processes such as refrigeration, air separation, and natural gas liquefaction.

[0003] In existing piston expanders, the working mechanism mainly relies on high-pressure gas to drive a piston to reciprocate within a cylinder. Specifically, when high-pressure gas enters the cylinder, it pushes the piston to move. During this process, the gas expands and depressurizes, not only outputting mechanical work but also lowering its own temperature, thereby cooling the gas and obtaining cold energy.

[0004] However, existing piston expanders suffer from significant energy efficiency issues during operation. After each piston completes its power stroke, it must return to its initial position to begin the next working cycle. Currently, this return operation typically requires additional energy input, such as through a spring structure that uses the spring force to power the piston's return, or by using other independent drive devices to propel the piston back to its initial position. This reliance on additional energy for piston return directly results in the piston expander consuming a large amount of extra energy during operation, severely reducing the overall energy efficiency of the equipment. Given the increasingly stringent energy conservation and emission reduction requirements in current industrial production, this deficiency in existing piston expanders is insufficient to meet practical application needs and urgently requires improvement. Utility Model Content

[0005] The purpose of this invention is to provide a ring expander in order to address the defects and shortcomings of the existing technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The present invention provides a ring expander comprising an outer shell having a circular cavity inside and a rotating wheel rotatably connected inside the outer shell; the two end faces of the rotating wheel are respectively attached to the two end faces of the circular cavity.

[0008] An annular cavity is formed between the rotating wheel and the circular cavity; a piston block for cutting off the cross-section of the annular cavity is provided on the wheel body of the rotating wheel; a telescopic stop for cutting off the annular cavity is provided inside the outer shell; an air inlet and an exhaust outlet connected to the annular cavity are respectively provided on the front and rear end faces of the circular cavity; the air inlet and exhaust outlet are staggered; the telescopic stop is provided between the air inlet and the exhaust outlet; a vent is provided at the end of the rotating wheel facing the air inlet; the vent extends through to the side surface of the rotating wheel.

[0009] Furthermore, the side wall of the rotating wheel is provided with a groove; the piston block is a cylindrical roller; one side of the cylindrical roller is inserted into the groove.

[0010] Furthermore, the outer casing consists of an outer casing and a cover plate detachably connected to the outer casing;

[0011] The circular cavity is disposed on the end face of the outer shell; the cover plate seals the open end face of the circular cavity; the air inlet is disposed on the outer shell; and the exhaust port is disposed on the cover plate.

[0012] Furthermore, the telescopic stop is a swing arm; the outer shell is provided with a sealed cavity that communicates with the annular cavity;

[0013] The swing arm is rotatably connected to the sealed cavity; one end of the swing arm extends into the annular cavity; a spring is connected between the other end of the swing arm and the sealed cavity; a wedge-shaped surface is provided on the swing arm; the front end face of the swing arm is provided as an arc-shaped surface; the side surface of the sealed cavity is provided with a concave arc surface that matches the arc-shaped surface; the arc-shaped surface is embedded in the concave arc surface.

[0014] Furthermore, a limiting cavity is provided on the side wall of the sealed cavity; a limiting block is provided on the swing rod; and the limiting block is inserted into the limiting cavity.

[0015] With the above structure, the beneficial effects of this utility model are as follows: When the rotating wheel moves to the position where the vent hole and the air inlet are directly opposite each other, high-pressure gas enters the air intake chamber from the air inlet. The high-pressure gas in the air intake chamber does work on the piston block, pushing the piston block and the rotating wheel to rotate. The vent hole and the air inlet are misaligned. At the same time, the output shaft on the rotating wheel does work externally, and the piston block discharges the gas that did work last time from the exhaust port to the outside in the exhaust chamber. During this process, the length of the air intake chamber continuously increases, while the length of the exhaust chamber continuously decreases. When the piston block passes the telescopic stop, the telescopic stop retracts to avoid it. The exhaust chamber reaches its minimum value, while the air intake chamber reaches its maximum value. When the piston block completely passes the telescopic stop, the telescopic stop re-seals the cross section of the annular cavity. The piston block rotates counterclockwise to the end cavity between the telescopic stop to form a new air intake chamber. The vent hole and the air inlet are immediately and briefly connected, introducing high-pressure gas from the air inlet and the vent hole into the air intake chamber, forming a unidirectional circulation motion structure. The high-pressure gas performs work on the piston block in the intake chamber and the gas discharged from the exhaust chamber by the piston block after the previous work is completed simultaneously, without the need for resetting and then discharge, which greatly improves the energy efficiency of the entire equipment. Attached Figure Description

[0016] Figure 1 This is a first-view perspective perspective view of this utility model;

[0017] Figure 2 This is a second-view stereoscopic perspective of the present invention;

[0018] Figure 3 This is the front view of this utility model;

[0019] Figure 4 This is a cross-sectional view of the present invention;

[0020] Figure 5 This is a structural diagram of the present invention after the cover plate has been removed;

[0021] Figure 6 This is a structural diagram of the outer shell;

[0022] Figure 7 It is an exploded view of the connection between the rotating wheel, the telescopic stop, and the piston block;

[0023] Figure 8 This is a structural diagram of the telescopic stop;

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Cover plate; 101. Exhaust port; 2. Output shaft; 3. Housing; 301. Air inlet;

[0026] 302, Annular cavity; 303, Sealed cavity; 30301, Concave arc surface; 30302, Limiting cavity;

[0027] 4. Rotary wheel; 401. Groove; 402. Vent hole; 5. Telescopic stop; 501. Arc-shaped surface;

[0028] 502, Limiting block; 503, Wedge-shaped surface; 6, Piston block; 7, Spring. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] like Figures 1 to 8 As shown, the annular expander of this utility model includes an outer shell with a circular cavity inside and a rotating wheel 4 rotatably connected inside the outer shell; the two end faces of the rotating wheel 4 are respectively attached to the two end faces of the circular cavity.

[0031] The rotating wheel 4 and the circular cavity form an annular cavity 302; a piston block 6 for cutting off the cross section of the annular cavity 302 is provided on the wheel body of the rotating wheel 4; a telescopic stop 5 for cutting into the annular cavity 302 is provided inside the outer shell; an air inlet 301 and an exhaust outlet 101 communicating with the annular cavity 302 are respectively provided on the front and rear end faces of the circular cavity; the air inlet 301 and the exhaust outlet 101 are staggered; the telescopic stop 5 is provided between the air inlet 301 and the exhaust outlet 101; a vent hole 402 is provided at the end of the rotating wheel 4 facing the air inlet 301; the vent hole 402 extends through to the side surface of the rotating wheel 4;

[0032] like Figure 4 As shown, the rotor 4 rotates counterclockwise, and the cavity between the piston block 6 and the telescopic stop 5 forms an exhaust cavity that is connected to the exhaust port 101; while the section of the piston block 6 between the piston block 6 and the telescopic stop 5 in the counterclockwise direction forms an intake cavity that is connected to the intake port 301.

[0033] When the rotor 4 moves to the position where the vent 402 is directly opposite the air inlet 301

[0034] High-pressure gas enters the intake chamber through inlet 301. The high-pressure gas in the intake chamber performs work on piston block 6, pushing piston block 6 and rotor 4 to rotate. Vent hole 402 is misaligned with inlet 301. Simultaneously, output shaft 2 on rotor 4 performs work externally. At the same time, piston block 6 discharges the gas from the previous work operation into the exhaust chamber through exhaust port 101. During this process, the length of the intake chamber continuously increases, while the length of the exhaust chamber continuously decreases. When piston block 6 passes the telescopic stop 5, the telescopic... The stop 5 retracts to avoid obstruction; the exhaust chamber reaches its minimum value, while the intake chamber reaches its maximum value; after the piston block 6 has completely passed the telescopic stop 5, the telescopic stop 5 re-seals the cross section of the annular cavity 302; the piston block 6 rotates counterclockwise to the end cavity between the telescopic stop 5 to form a new intake chamber, and the vent 402 and the intake port 301 are immediately and briefly connected, introducing high-pressure gas from the intake port 301 and the vent 402 into the intake chamber, forming a one-way circulation motion structure.

[0035] The high-pressure gas performs work on the piston block 6 in the intake chamber and the gas discharged from the exhaust chamber by the piston block 6 after the previous work is completed simultaneously, without the need for resetting and discharge, which greatly improves the energy efficiency of the entire equipment.

[0036] In a preferred embodiment of this utility model, a groove 401 is provided on the side wall of the rotating wheel 4; the piston block 6 is a cylindrical roller; one side of the cylindrical roller is inserted into the groove 401; the other side of the cylindrical roller is attached to the side surface of the annular cavity 302; by using the cylindrical roller as the piston structure, the resistance between the piston block 6 and the annular cavity 302 is reduced.

[0037] In a preferred embodiment of the present invention, the outer shell is composed of an outer shell 3 and a cover plate 1 detachably connected to the outer shell 3;

[0038] The circular cavity is disposed on the end face of the outer shell 3; the cover plate 1 is sealed on the open end face of the circular cavity; the air inlet 301 is disposed on the outer shell 3; the exhaust port 101 is disposed on the cover plate 1; the outer shell 3 and the cover plate 1 are fixed by bolts in a detachable manner, which facilitates the disassembly and assembly of the expander.

[0039] In a preferred embodiment of this utility model, the telescopic stop 5 is a swing rod; the outer shell is provided with a sealing cavity 303 that communicates with the annular cavity 302;

[0040] The swing arm is rotatably connected to the sealed cavity 303; one end of the swing arm extends into the annular cavity 302; a spring 7 is connected between the other end of the swing arm and the sealed cavity 303; a wedge-shaped surface 503 is provided on the swing arm; the front end face of the swing arm is provided as an arc-shaped surface 501; the side surface of the sealed cavity 303 is provided with a concave arc surface 30301 that matches the arc-shaped surface 501; the arc-shaped surface 501 is embedded in the concave arc surface 30301; the spring 7 enables the swing arm to extend and reset towards the rotating wheel 4; after the swing arm resets, the swing arm separates the annular cavity 302; during the swing of the swing arm in the sealed cavity 303, the concave arc surface 30301 and the arc-shaped surface 501 are fully in contact, ensuring that the position where the sealed cavity 303 and the annular cavity 302 are in contact is always in a sealed state, preventing gas from entering the sealed cavity 303;

[0041] The outer casing is equipped with a powered movable pin. When the rocker arm returns to its original position, the power drives the movable pin to limit the rocker arm, preventing high-pressure gas from overcoming the elastic force of the spring 7 and pushing the rocker arm away. When the piston block 6 is about to pass the rocker arm, the power drives the movable pin to move, releasing the limit on the rocker arm. The piston block 6 pushes the wedge-shaped surface 503, causing the rocker arm to overcome the resistance of the spring 7 and retract into the sealing cavity 303. After the piston block 6 has completely passed the rocker arm, the elastic force of the spring 7 causes the rocker arm to return to its original position. Then the movable pin re-inserts into the sealing cavity 303 to position the rocker arm.

[0042] In a preferred embodiment of this utility model, a limiting cavity 30302 is provided on the side wall of the sealing cavity 303; a limiting block 502 is provided on the swing rod; and the limiting block 502 is inserted into the limiting cavity 30302.

[0043] The limiting cavity 30302 is used to limit the stroke of the limiting block 502 to prevent the end of the rocker arm from impacting the wheel 4.

[0044] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A ring expander, characterized in that: It includes an outer shell with a circular cavity inside and a rotating wheel (4) rotatably connected inside the outer shell; the two end faces of the rotating wheel (4) are respectively attached to the two end faces of the circular cavity; The rotating wheel (4) forms an annular cavity (302) with the circular cavity; a piston block (6) is provided on the wheel body of the rotating wheel (4) for cutting off the cross section of the annular cavity (302); a telescopic stop (5) is provided inside the outer shell for cutting into the annular cavity (302); an air inlet (301) and an exhaust outlet (101) connected to the annular cavity (302) are respectively provided on the front and rear end faces of the circular cavity; the air inlet (301) and the exhaust outlet (101) are staggered; the telescopic stop (5) is provided between the air inlet (301) and the exhaust outlet (101); a vent hole (402) is provided at the end of the rotating wheel (4) facing the air inlet (301); the vent hole (402) extends through to the side surface of the rotating wheel (4).

2. The annular expander according to claim 1, characterized in that: The side wall of the rotating wheel (4) is provided with a groove (401); the piston block (6) is a cylindrical roller; one side of the cylindrical roller is inserted into the groove (401).

3. The annular expander according to claim 1, characterized in that: The outer shell consists of an outer shell (3) and a cover plate (1) detachably connected to the outer shell (3); The circular cavity is disposed on the end face of the outer shell (3); the cover plate (1) is sealed on the open end face of the circular cavity; the air inlet (301) is disposed on the outer shell (3); and the exhaust port (101) is disposed on the cover plate (1).

4. The annular expander according to claim 1, characterized in that: The telescopic stop (5) is a swing rod; the outer shell is provided with a sealed cavity (303) that communicates with the annular cavity (302). The swing arm is rotatably connected to the sealed cavity (303); one end of the swing arm extends into the annular cavity (302); a spring (7) is connected between the other end of the swing arm and the sealed cavity (303); a wedge-shaped surface (503) is provided on the swing arm; the front end face of the swing arm is set as an arc-shaped surface (501); the side surface of the sealed cavity (303) is provided with a concave arc surface (30301) that matches the arc-shaped surface (501); the arc-shaped surface (501) is embedded in the concave arc surface (30301).

5. The annular expander according to claim 4, characterized in that: A limiting cavity (30302) is provided on the side wall of the sealed cavity (303); a limiting block (502) is provided on the swing rod; the limiting block (502) is inserted into the limiting cavity (30302).

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