Piston structure for a compressor

Abstract

The utility model relates to a compressor technical field especially relates to a piston structure for compressor, its characterized in that, including piston body, the outer circumferential surface of piston body, from the head to the all direction is sequentially provided with first gas ring groove, second gas ring groove, first oil ring groove and second oil ring groove, wherein, the depth of first oil ring groove is greater than the depth of second oil ring groove, the first hole and the second hole are set up on the piston body, and the first hole and the second hole all obliquely penetrate the side wall of piston body, and the axis of first hole and the axis of second hole are parallel to each other, the axis of first hole and the axis of piston body form first acute angle, and the axis of second hole and the axis of piston body form second acute angle, the entrance of first hole is located the groove bottom position of first oil ring groove, and the outlet of first hole extends to the inner chamber of piston body, the entrance of second hole is located the groove bottom position of second oil ring groove, and the outlet of second hole extends to the inner chamber of piston body.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a piston structure for a compressor. Background Technology

[0002] A compressor is a fluid machine that raises low-pressure gas to high-pressure gas. It draws in low-pressure gas, compresses it to increase the gas pressure, and finally discharges high-pressure gas. It has a wide range of applications in many industrial fields such as refrigeration, chemical industry, petroleum, machinery manufacturing, and food processing, as well as in daily life. For example, it is used in the refrigeration cycle of refrigerators and air conditioners, and in gas transportation and compression in industrial production. Its performance is directly related to the operating efficiency, energy consumption, and reliability of related equipment.

[0003] The piston is one of the core moving parts of a compressor, and its structural design has a crucial impact on the compressor's performance. During compressor operation, the piston, as a key component, directly affects the compressor's efficiency and service life. Traditional compressor piston structures often suffer from insufficient lubrication, making it difficult for lubricating oil to reach the parts that need lubrication, leading to increased wear between the piston and cylinder wall. At the same time, some piston structures lack sufficient strength and are prone to deformation or damage during long-term operation. In addition, poor oil-gas separation also reduces the compressor's efficiency. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a piston structure for a compressor.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A piston structure for a compressor, characterized in that it includes a piston body, on the outer circumferential surface of which a first gas ring groove, a second gas ring groove, a first oil ring groove, and a second oil ring groove are sequentially arranged from the head to the entire direction; wherein the depth of the first oil ring groove is greater than the depth of the second oil ring groove; a first channel and a second channel are formed on the piston body, both the first channel and the second channel obliquely penetrating the sidewall of the piston body, and the axis of the first channel is parallel to the axis of the second channel; the axis of the first channel forms a first acute angle with the axis of the piston body, and the axis of the second channel forms a second acute angle with the axis of the piston body; the inlet of the first channel is located at the bottom of the first oil ring groove, and the outlet of the first channel extends into the inner cavity of the piston body; the inlet of the second channel is located at the bottom of the second oil ring groove, and the outlet of the second channel extends into the inner cavity of the piston body.

[0007] Furthermore, the piston body has an oil reservoir on its skirt; a third channel is also provided on the piston body, the third channel obliquely penetrates the side wall of the piston body, and the axis of the third channel is parallel to the axis of the first channel; the inlet of the third channel is located at the bottom of the oil reservoir, and the outlet of the third channel extends into the inner cavity of the piston body.

[0008] Furthermore, the first, second, and third channels are all Venturi tube structures, and each channel is composed of a contraction section, a throat, and an expansion section along its axial direction.

[0009] Furthermore, a reinforcing rib is provided in the inner cavity of the piston body; in the axial direction of the piston body, one end of the reinforcing rib is connected to the inner wall of the top of the piston body, and the other end is connected to the outer wall of the pin seat in the inner cavity of the piston body; in the radial direction perpendicular to the axis of the piston body, one end of the reinforcing rib is connected to the side wall of the inner cavity of the piston body, and the other end extends to the end of the pin seat.

[0010] Furthermore, multiple pits are evenly distributed on the top plane of the piston body.

[0011] Furthermore, the reinforcing rib has at least one through hole.

[0012] Furthermore, the piston body is made of aluminum alloy, and the inner surfaces of the first channel, the second channel, and the third channel (if present) are covered with a friction-reducing coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] Compared with the prior art, the piston structure for compressors of the present invention can effectively improve the lubrication effect, reduce the wear between the piston and the cylinder wall, enhance the strength and stability of the piston, extend its service life, improve the oil-gas separation effect, and improve the working efficiency of the compressor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the piston structure for the compressor proposed in this utility model;

[0016] Figure 2 This is a cross-sectional view of the piston structure for the compressor proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the piston structure for the compressor proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the Chinese hill structure of the piston structure for the compressor proposed in this utility model.

[0019] In the figure: 1-piston body, 11-first compression ring groove, 12-second compression ring groove, 13-first oil ring groove, 14-second oil ring groove, 15-first channel, 16-second channel, 17-oil reservoir, 18-third channel, 19-recess, 110-reinforcing rib, 111-pin seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-4 As shown, this embodiment provides a piston structure for a compressor, characterized by comprising a piston body 1. On the outer circumferential surface of the piston body 1, from the head outwards, are sequentially arranged a first gas ring groove 11, a second gas ring groove 12, a first oil ring groove 13, and a second oil ring groove 14; wherein the depth of the first oil ring groove 13 is greater than the depth of the second oil ring groove 14; a first channel 15 and a second channel 16 are provided on the piston body 1, both the first channel 15 and the second channel 16 obliquely penetrating the sidewall of the piston body 1, and the axis of the first channel 15 is parallel to the axis of the second channel 16; the axis of the first channel 15 forms a first acute angle with the axis of the piston body 1, and the axis of the second channel 16 forms a second acute angle with the axis of the piston body 1; the inlet of the first channel 15 is located at the bottom of the first oil ring groove 13, and the outlet of the first channel 15 extends into the inner cavity of the piston body 1; the inlet of the second channel 16 is located at the bottom of the second oil ring groove 14, and the outlet of the second channel 16 extends into the inner cavity of the piston body 1.

[0022] Overall, by making the depth of the first oil ring groove 13 greater than the depth of the second oil ring groove 14, and combining the inclined first channel 15 and second channel 16, the centrifugal force of the piston movement accelerates the return of oil, avoiding oil accumulation in the oil ring groove; it can better recover the lubricating oil in the oil ring groove to the inner cavity of the piston body 1, reduce the consumption of lubricating oil, and improve the oil-gas separation effect. The design of the deep and shallow oil ring grooves increases the oil storage capacity and adapts to different lubrication needs.

[0023] like Figures 1-2As shown, in this embodiment, the skirt of the piston body 1 is provided with an oil storage groove 17; the piston body 1 is also provided with a third channel 18, which obliquely penetrates the side wall of the piston body 1, and the axis of the third channel 18 is parallel to the axis of the first channel 15; the inlet of the third channel 18 is located at the bottom of the oil storage groove 17, and the outlet of the third channel 18 extends into the inner cavity of the piston body 1.

[0024] Specifically, the oil reservoir 17 can store a certain amount of lubricating oil. During the piston movement, the lubricating oil in the oil reservoir 17 is introduced into the inner cavity through the third channel 18 to further replenish the amount of lubricating oil in the inner cavity, enhance the lubrication effect, ensure that all parts of the piston are fully lubricated, and reduce wear.

[0025] like Figure 2 and Figure 4 As shown, in this embodiment, the first channel 15, the second channel 16 and the third channel 18 are all Venturi tube structures, and each channel is composed of a contraction section, a throat and an expansion section in sequence along its axial direction.

[0026] Specifically, through the channel design of the Venturi tube structure, negative pressure is generated at the throat using the principles of fluid mechanics, which can more efficiently draw the lubricating oil in the oil ring groove and oil storage tank 17 into the inner cavity, improve the efficiency of lubricating oil recovery and transportation, further enhance the lubrication effect, and also help improve the efficiency of oil-gas separation.

[0027] like Figures 2-3 As shown, in this embodiment, a reinforcing rib 110 is provided in the inner cavity of the piston body 1; in the axial direction of the piston body 1, one end of the reinforcing rib 110 is connected to the inner wall of the top of the piston body 1, and the other end is connected to the outer wall of the pin seat 111 in the inner cavity of the piston body 1; in the radial direction perpendicular to the axis of the piston body 1, one end of the reinforcing rib 110 is connected to the side wall of the inner cavity of the piston body 1, and the other end extends to the end of the pin seat 111.

[0028] By setting the reinforcing ribs 110, the inner cavity of the piston body 1 is supported and reinforced from the axial and radial directions, which significantly enhances the strength and rigidity of the piston body 1, reduces the deformation of the piston during high-speed movement, and improves the service life of the piston.

[0029] like Figures 2-3 As shown, in this embodiment, a plurality of pits 19 are evenly distributed on the top plane of the piston body 1.

[0030] By evenly distributing multiple recesses 19 on the top plane of the piston body 1, the heat dissipation area of ​​the piston can be increased, thermal stress can be dispersed, and the risk of high-temperature deformation at the top can be reduced. The multiple recesses 19 on the top plane can improve the stress situation at the top of the piston and reduce the impact of gas impact to a certain extent.

[0031] like Figure 3 As shown, in this embodiment, the reinforcing rib 110 has at least one through hole.

[0032] Specifically, the through holes on the reinforcing rib 110 can reduce the weight of the piston, while facilitating the flow and distribution of lubricating oil in the piston cavity, further optimizing the lubrication effect.

[0033] like Figures 1-3 As shown, in this embodiment, the piston body 1 is made of aluminum alloy, and the inner surfaces of the first channel 15, the second channel 16, and the third channel 18 when present are covered with a friction-reducing coating.

[0034] The physical properties of aluminum alloy make the piston body 1 lighter, which helps to reduce the inertial force during piston movement and improve the operating efficiency of the compressor. The anti-friction coating on the inner surface of the channel can reduce the resistance of lubricating oil flowing in the channel, reduce friction loss, and at the same time extend the service life of the channel and ensure the smooth flow of the channel.

[0035] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0037] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A piston structure for a compressor, characterized in that, The piston body (1) includes a piston body (1). On the outer circumferential surface of the piston body (1), from the head outwards, are sequentially provided a first gas ring groove (11), a second gas ring groove (12), a first oil ring groove (13), and a second oil ring groove (14). The depth of the first oil ring groove (13) is greater than the depth of the second oil ring groove (14). The piston body (1) has a first channel (15) and a second channel (16), both of which obliquely penetrate the sidewall of the piston body (1). The first channel (15) has a... The axis is parallel to the axis of the second channel (16); the axis of the first channel (15) forms a first acute angle with the axis of the piston body (1), and the axis of the second channel (16) forms a second acute angle with the axis of the piston body (1); the inlet of the first channel (15) is located at the bottom of the first oil ring groove (13), and the outlet of the first channel (15) extends into the inner cavity of the piston body (1); the inlet of the second channel (16) is located at the bottom of the second oil ring groove (14), and the outlet of the second channel (16) extends into the inner cavity of the piston body (1).

2. The piston structure for a compressor according to claim 1, characterized in that, The piston body (1) has an oil reservoir (17) on its skirt; a third channel (18) is also provided on the piston body (1), the third channel (18) obliquely penetrates the side wall of the piston body (1), and the axis of the third channel (18) is parallel to the axis of the first channel (15); the inlet of the third channel (18) is located at the bottom of the oil reservoir (17), and the outlet of the third channel (18) extends into the inner cavity of the piston body (1).

3. The piston structure for a compressor according to claim 2, characterized in that, The first channel (15), the second channel (16) and the third channel (18) are all Venturi tube structures, and each channel is composed of a contraction section, a throat and an expansion section along its axial direction.

4. The piston structure for a compressor according to claim 2, characterized in that, The piston body (1) has a reinforcing rib (110) in its inner cavity. In the axial direction of the piston body (1), one end of the reinforcing rib (110) is connected to the inner wall of the top of the piston body (1), and the other end is connected to the outer wall of the pin seat (111) in the inner cavity of the piston body (1). In the radial direction perpendicular to the axis of the piston body (1), one end of the reinforcing rib (110) is connected to the side wall of the inner cavity of the piston body (1), and the other end extends to the end of the pin seat (111).

5. The piston structure for a compressor according to claim 1, characterized in that, The piston body (1) has multiple pits (19) evenly distributed on its top plane.

6. The piston structure for a compressor according to claim 4, characterized in that, The reinforcing rib (110) has at least one through hole.

7. The piston structure for a compressor according to any one of claims 1-6, characterized in that, The piston body (1) is made of aluminum alloy, and the inner surfaces of the first channel (15), the second channel (16) and the third channel (18) when present are covered with a friction-reducing coating.

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