Combined piston for compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a combined piston for a compressor, which comprises a piston head, a connecting rod is slidably connected to the inside of the piston head, a conical head is fixedly connected to the left side of the connecting rod, a sealing gasket is sleeved on the outer wall of the connecting rod, a cavity is arranged on the right side of the inside of the piston head, and a piston rod is arranged in the cavity. A first spring is fixedly connected to the inner wall of the left side of the cavity, a fixing column is fixedly connected to the inner wall of the left side of the cavity, the fixing column is sleeved with a second spring, the right side of the connecting rod is in threaded connection with a piston skirt part, and a sealing circular plate is detachably connected to the left side of the piston skirt part. According to the utility model, after the spring I and the spring II are compressed under pressure, the tightness between sealing parts is enhanced. The good sealing effect can reduce gas leakage, the gas compression process in the compressor is more efficient, and energy loss caused by leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a combined piston used in compressors. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas and is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it through the motor-driven piston, and then discharges high-temperature, high-pressure refrigerant gas into the exhaust pipe, providing power for the refrigeration cycle. The piston's primary function in a compressor is to change the volume within the cylinder through reciprocating motion, thereby achieving the intake, compression, and discharge of gas. Specifically, when the piston moves downward, the volume within the cylinder increases, creating a vacuum, and external gas is drawn into the cylinder through the intake valve. When the piston moves upward, the volume within the cylinder decreases, compressing the gas. When the pressure reaches a certain level, the exhaust valve opens, and the compressed gas is discharged from the cylinder.

[0003] A modular piston is one in which the piston head and skirt are manufactured separately and then assembled into a single piece. This design is commonly used in large, low-speed diesel engines and highly reinforced diesel engines. The main purpose of using a modular piston is to allow different materials to be used for different parts of the piston to adapt to different operating conditions and requirements.

[0004] However, in the prior art, some combined pistons of compressors are not so precise in terms of sealing, and gas leakage is prone to occur at the connection between the piston and other components and between the piston and the cylinder wall due to the inaccurate structural design. For example, in some old-fashioned compressor piston structures, there is a lack of effective sealing components and the synergistic effect of the sealing mechanism. Sealing is achieved by simply fitting the piston to the cylinder wall. This sealing method cannot meet the sealing requirements when the compressor is working, especially in a high-temperature and high-pressure working environment. As the compressor continues to operate, the sealing performance gradually decreases, resulting in a large amount of gas leakage. This not only greatly reduces the compression efficiency of the compressor, but also increases the energy consumption of the compressor due to the need to continuously replenish gas due to gas leakage. For this reason, a combined piston for a compressor is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above deficiencies, the present invention provides a combined piston for a compressor, aiming to improve the problem in the prior art that the combined pistons of some compressors are insufficiently sealed, resulting in reduced compressor efficiency.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A combined piston for a compressor, comprising a piston head, a connecting rod slidably connected to the interior of the piston head, a conical head fixedly connected to the left side of the connecting rod, a sealing gasket sleeved on the outer wall of the connecting rod, a cavity being opened on the right side of the interior of the piston head, a first spring fixedly connected to the left inner wall of the cavity, a fixing column fixedly connected to the left inner wall of the cavity, a second spring sleeved on the outer side of the fixing column, a piston skirt being threadedly connected to the right side of the connecting rod, a sealing circular plate being detachably connected to the left side of the piston skirt, and a sealing ring being fixedly connected to the outside of the sealing circular plate;

[0008] As a further description of the above technical solution:

[0009] Two annular grooves are formed on the outside of the piston head, a piston pin hole is formed on the right side of the inside of the piston skirt, and a reinforcing rib is provided on the right side of the piston skirt;

[0010] As a further description of the above technical solution:

[0011] The left side of the sealing gasket contacts the right side of the conical head, and the right side of the sealing gasket contacts the left inner wall of the piston head;

[0012] As a further description of the above technical solution:

[0013] The outer wall of the connecting rod is slidably connected to the inner wall of the fixing column, and the outer wall of the connecting rod is in contact with the inner wall of the sealing circular plate;

[0014] As a further description of the above technical solution:

[0015] The right side of the spring 1 contacts the left side of the sealing ring, the left side of the spring 2 is fixedly connected to the left inner wall of the cavity, and the right side of the spring 2 contacts the left side of the sealing circular plate;

[0016] As a further description of the above technical solution:

[0017] The left side of the sealing ring contacts the right side of the piston head, and the right side of the sealing ring contacts the left side of the piston skirt.

[0018] The utility model has the following beneficial effects:

[0019] In the present invention, the connecting rod is slidably connected to the piston head, and the left conical head can accurately position and squeeze the sealing gasket, so that the sealing gasket effectively prevents gas from leaking from the connection between the connecting rod and the piston head. The piston skirt is threadedly connected to the connecting rod. Rotating the piston skirt can clamp the sealing ring between the piston head and the piston skirt. At the same time, the sealing disc and the sealing ring cooperate to further seal. When springs 1 and 2 are compressed under pressure, the tightness between the sealing components is enhanced. A good sealing effect can reduce gas leakage, making the gas compression process in the compressor more efficient and reducing energy loss caused by leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the combined piston for a compressor proposed in the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the piston head of the combined piston for a compressor proposed in the present invention;

[0022] Figure 3 This is a schematic structural diagram of the piston skirt of the combined piston for a compressor proposed in the present invention.

[0023] Legend:

[0024] 1. Piston head; 2. Connecting rod; 3. Conical head; 4. Sealing gasket; 5. Cavity; 6. Spring 1; 7. Fixing column; 8. Spring 2; 9. Annular groove; 10. Piston skirt; 11. Sealing circular plate; 12. Sealing ring; 13. Piston pin hole; 14. Reinforcing rib. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1 、 Figure 2 and Figure 3The utility model provides an embodiment: a combined piston for a compressor, comprising a piston head 1, which is an important component of the combined piston. It is at the front end position in the entire piston structure and directly participates in the working process of the compressor. Its main function is to cooperate with other components to form a sealed space to compress the gas. The piston head 1 is internally slidably connected to a connecting rod 2, and the right side of the connecting rod 2 is threadedly connected to a piston skirt 10. This threaded connection method is the key to achieving a detachable connection between the piston head 1 and the piston skirt 10. Through the threaded connection, when the piston skirt 10 is rotated, the piston skirt 10 can move axially along the connecting rod 2. A conical head 3 is fixedly connected to the left side of the connecting rod 2, and a sealing gasket 4 is provided on the outer wall of the connecting rod 2. The left side of the sealing gasket 4 is in contact with the right side of the conical head 3, and the right side of the sealing gasket 4 is in contact with the left inner wall of the piston head 1. When the sealing gasket 4 is initially installed, the conical head 3 plays a role in positioning and extrusion. When the sealing gasket 4 is placed on the connecting rod 2 and then inserted into the piston head 1, the conical head 3 can accurately contact the right side of the sealing gasket 4 with the left side of the piston head 1. During operation, the sealing gasket 4, under the pressure of the conical head 3 and the piston head 1, can effectively prevent gas from leaking from the connection between the connecting rod 2 and the piston head 1, ensuring the sealing inside the piston. A cavity 5 is provided on the right side of the interior of the piston head 1. The provision of cavity 5 can reduce the weight of the piston and thus reduce the inertial force of the piston during reciprocating motion. In a compressor, the reciprocating motion of the piston is very frequent. Reducing the weight of the piston can reduce the vibration of the compressor during operation and improve the operating stability of the compressor.

[0027] The left inner wall of the cavity 5 is fixedly connected to a spring 1 (6). The left inner wall of the cavity 5 is fixedly connected to a fixed column 7. The outer wall of the connecting rod 2 is slidably connected to the inner wall of the fixed column 7. The outer sleeve of the fixed column 7 is provided with a spring 2 (8). The left side of the piston skirt 10 is detachably connected to a sealing circular plate 11. The outer wall of the connecting rod 2 contacts the inner wall of the sealing circular plate 11. A sealing ring 12 is fixedly connected to the outside of the sealing circular plate 11. The left side of the sealing ring 12 contacts the right side of the piston head 1, and the right side of the sealing ring 12 contacts the left side of the piston skirt 10. The function of the sealing ring 12 is to cooperate with the sealing circular plate 11 to form a seal between the piston head 1 and the piston skirt 10 to prevent gas leakage. The right side of spring 1 6 contacts the left side of the sealing ring 12, and the left side of spring 2 8 is fixedly connected to the left inner wall of the cavity 5. The right side of spring 2 8 contacts the left side of the sealing circular plate 11. Spring 2 8 and spring 1 6 will be compressed by the pressure of the sealing circular plate 11 and the sealing ring 12 respectively. The pressure generated by the compression of spring 1 6 and spring 2 8 is used to further strengthen the tightness between the sealing circular plate 11, the sealing ring 12 and the piston head 1 and the piston skirt 10, thereby improving the sealing effect.

[0028] Reference Figure 2 and Figure 3 The piston head 1 has two annular grooves 9 on its exterior for mounting piston rings. These grooves effectively seal the high-temperature, high-pressure gases within the combustion chamber. During engine operation, the piston moves up and down, and the piston rings fit tightly against the cylinder wall within the annular grooves 9, preventing gases within the combustion chamber from leaking into the crankcase through the gap between the piston and the cylinder wall. This helps maintain pressure in the combustion chamber and ensures proper combustion in the engine. A piston pin hole 13 is located on the right side of the piston skirt 10. This circular hole serves to mount the piston pin. The piston pin connects the piston to the connecting rod through this hole, allowing the reciprocating motion of the piston within the cylinder to be transmitted to the connecting rod, thereby achieving power transmission and the compressor's operating cycle. A reinforcing rib 14 is provided on the right side of the piston skirt 10. The rib 14 serves to increase the structural strength of the piston skirt 10. During the operation of the piston, the piston skirt 10 is subjected to various forces. The reinforcing ribs 14 can enhance the ability of the piston skirt 10 to resist these forces, thereby ensuring the stability and reliability of the piston skirt 10 during operation.

[0029] Working principle: First, put the sealing gasket 4 on the connecting rod 2, then insert the connecting rod 2 into the piston head 1 and use the conical head 3 to make the right side of the sealing gasket 4 contact with the left side of the piston head 1, and then cooperate with the connecting rod 2 by rotating the piston skirt 10. Since the right side of the connecting rod 2 and the inside of the piston skirt 10 are threadedly connected, the rotating piston skirt 10 drives itself to move to the left, thereby clamping the sealing ring 12 between the piston head 1 and the piston skirt 10. At the same time, spring 2 8 and spring 1 6 will be compressed by the pressure of the sealing disc 11 and the sealing ring 12 respectively. The pressure generated by the compression of spring 1 6 and spring 2 8 is used to further strengthen the tightness between the sealing disc 11, the sealing ring 12 and the piston head 1 and the piston skirt 10, thereby improving the sealing effect of the piston.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A modular piston for a compressor, comprising a piston head (1), characterized in that: The piston head (1) is internally slidably connected to a connecting rod (2), the left side of the connecting rod (2) is fixedly connected to a conical head (3), the outer wall of the connecting rod (2) is sleeved with a sealing gasket (4), the right side of the interior of the piston head (1) is provided with a cavity (5), the left inner wall of the cavity (5) is fixedly connected to a spring 1 (6), the left inner wall of the cavity (5) is fixedly connected to a fixing column (7), the outer side of the fixing column (7) is sleeved with a spring 2 (8), the right side of the connecting rod (2) is threadedly connected to a piston skirt (10), the left side of the piston skirt (10) is detachably connected to a sealing circular plate (11), and the outer side of the sealing circular plate (11) is fixedly connected to a sealing ring (12).

2. The combined piston for a compressor according to claim 1, characterized in that: Two annular grooves (9) are provided on the outside of the piston head (1), a piston pin hole (13) is provided on the right side of the inside of the piston skirt (10), and a reinforcing rib (14) is provided on the right side of the piston skirt (10).

3. The combined piston for a compressor according to claim 1, characterized in that: The left side of the sealing gasket (4) contacts the right side of the conical head (3), and the right side of the sealing gasket (4) contacts the left inner wall of the piston head (1).

4. The combined piston for a compressor according to claim 1, characterized in that: The outer wall of the connecting rod (2) is slidably connected to the inner wall of the fixing column (7), and the outer wall of the connecting rod (2) is in contact with the inner wall of the sealing circular plate (11).

5. The combined piston for a compressor according to claim 1, characterized in that: The right side of the spring 1 (6) contacts the left side of the sealing ring (12), the left side of the spring 2 (8) is fixedly connected to the left inner wall of the cavity (5), and the right side of the spring 2 (8) contacts the left side of the sealing circular plate (11).

6. The combined piston for a compressor according to claim 1, characterized in that: The left side of the sealing ring (12) contacts the right side of the piston head (1), and the right side of the sealing ring (12) contacts the left side of the piston skirt (10).

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