Oil-free starting swash plate compressor

Abstract

The utility model discloses an oil-free starting swash plate compressor, belongs to the technical field of compressors, and aims to solve the problem that the swash plate compressor is easy to damage in the starting and running processes under the low-temperature condition. According to the technical scheme, a main shaft is provided with a swash plate, and the surface of the swash plate is plated with a molybdenum dioxide plating layer; one end of the main shaft is connected with a belt wheel for driving the main shaft to rotate, and the outer side of the belt wheel is detachably connected with a primary sealing piece; the main shaft is sleeved with a shaft seal rotating along with the main shaft, the circumferential inner wall of the mounting groove is provided with a containing groove for containing the shaft seal, and the containing groove is located between the swash plate bearing and the belt wheel. A sealing groove is formed in the side, close to the belt wheel, of the shaft seal, and a second-stage sealing piece is arranged in the sealing groove, so that the damage probability of the two-way swash plate compressor in the starting and running process under the low-temperature condition is reduced, the durability and reliability of the two-way swash plate compressor in the starting and running process are improved, and the influence of impurities on internal parts of the compressor is reduced; and the overall durability and reliability of the compressor in a low-temperature environment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and more particularly to an oil-free starting swash plate compressor. Background Art

[0002] In traditional compressor design, the main considerations are its operating performance and reliability in normal and high temperature environments. With the development of global trade, especially the rapid growth of China's exports of auto parts to Russia, and since most parts of Russia have a subarctic climate with cold and long winters, and average temperatures often ranging from -8°C to -20°C, compressors, as one of the core components of auto parts, have placed higher requirements on adaptability and reliability in extreme low temperature environments.

[0003] Low temperature environments will significantly reduce the fluidity of the refrigeration oil, resulting in the risk of the compressor facing oil-free lubrication during startup. Oil-free startup will not only increase the wear inside the compressor, but may also cause abnormal noise and performance degradation. In severe cases, it may even cause damage to the compressor. In addition, impurities that invade the compressor in low temperature environments will not only further reduce the fluidity of the lubricating oil, but also destroy the integrity of the lubricating oil film, making the lubricated parts more susceptible to wear. Impurities will aggravate the wear of bearings and other moving parts, further shortening the service life of the compressor. Therefore, in order to adapt to the market demand in subarctic climate regions such as Russia, a new solution is needed to solve the problem of easy wear of the swash plate compressor during startup and operation under low temperature conditions. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide an oil-free starting swash plate compressor, which reduces the probability of damage to the swash plate compressor during startup and operation under low temperature conditions through structural adjustment, thereby improving the reliability and stability of the compressor under low temperature conditions.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: an oil-free starting swash plate compressor comprises a compressor body and a main shaft, wherein the compressor body is provided with a mounting groove for mounting the main shaft, a swash plate is provided on the main shaft, and the surface of the swash plate is plated with a molybdenum dioxide coating;

[0006] One end of the main shaft is connected to a pulley for driving the main shaft to rotate, and the outer side of the pulley is detachably connected to a primary seal;

[0007] The main shaft is sleeved with a shaft seal that rotates with the main shaft, and the inner wall of the mounting groove is provided with a receiving groove for receiving the shaft seal, and the receiving groove is located between the swash plate bearing and the pulley;

[0008] A sealing groove is provided on a side of the shaft seal close to the pulley, and a secondary sealing element is provided in the sealing groove.

[0009] The utility model is further configured as follows: the shaft seal includes a positioning piece and a matching piece, the positioning piece is provided with a groove for accommodating the matching piece on a side close to the pulley, the inner wall of the groove is provided with a connecting groove on an end away from the pulley, and the matching piece is inserted into the connecting groove on an end away from the pulley.

[0010] The utility model is further configured as follows: the sealing groove is formed by connecting the matching piece and the positioning piece.

[0011] The utility model is further configured as follows: a matching groove is provided at one end of the matching piece away from the pulley, a protrusion is fixedly connected to the bottom wall of the groove of the positioning piece, and the protrusion penetrates into the matching groove.

[0012] The present invention is further configured as follows: the secondary sealing component includes a first plate body and a second plate body, and the first plate body is located on a side of the second plate body close to the main shaft.

[0013] The utility model is further configured as follows: the end of the second plate away from the pulley is fixedly connected to a transition plate, the transition plate abuts against the positioning member, and the end of the transition plate away from the second plate is fixedly connected to the first plate.

[0014] The present invention is further configured as follows: one end of the transition plate close to the second plate body is arc-shaped.

[0015] The utility model is further configured as follows: the primary sealing component is connected to the compressor body via bolts.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. Optimizing the swash plate through an improved molybdenum disulfide coating surface treatment significantly increases the dry lock time of the compressor, significantly extending the compressor's operating time in oil-free conditions. Compared to traditional anodizing, molybdenum disulfide coating not only provides the compressor with more time to ensure that lubricating oil is effectively delivered to the compressor's working chamber, thereby achieving oil-free starting, but also improves the wear resistance of the pulley, enhancing the overall reliability of the compressor and reducing the failure rate under harsh conditions.

[0018] 2. In low-temperature environments, impurities intensify the damage to the pulley bearing. By adding a multi-stage sealing structure on both sides of the pulley, the invasion of dust and other potential impurities is effectively blocked, and the chance of dust contacting the pulley bearing is reduced, thereby reducing the wear of the bearing or drive shaft caused by increased friction, further enhancing the reliability of the sealing structure, thereby maintaining the integrity of the pulley and extending the service life of the compressor.

[0019] When the compressor is working, the multi-stage sealing structure can effectively block dust that may invade the pulley bearing and reduce the damage of impurities to the pulley, thereby effectively ensuring the normal operation of the pulley, and significantly improving the stability and reliability of the compressor operation. The structural setting reduces the probability of damage to the bidirectional swash plate compressor during startup and operation under low temperature conditions, improves its durability and reliability during startup and operation, reduces the impact of impurities on the internal parts of the compressor, and improves the overall durability and reliability of the compressor in low temperature environments, ensuring that the compressor can still start normally under low temperature and oil-free conditions, and maintain efficient and stable operating performance to meet the use needs of cold regions such as Russia. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a side view of the compressor body;

[0021] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 It is a cross-sectional view of the shaft seal and secondary seal;

[0024] Figure 5 It is a cross-sectional view of the shaft seal;

[0025] Figure 6 Exploded view of the positioning parts and matching parts;

[0026] Figure 7 A cross-sectional view of the secondary seal.

[0027] In the figure: 1. Compressor body; 2. Main shaft; 3. Mounting groove; 31. Accommodating groove; 4. Pulley; 5. Primary seal; 6. Shaft seal; 61. Positioning piece; 611. Groove; 612. Connecting groove; 613. Protrusion; 62. Matching piece; 621. Matching groove; 7. Sealing groove; 8. Secondary seal; 81. First plate; 82. Second plate; 83. Transition plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Example:

[0030] like Figure 1 and Figure 2 As shown, the oil-free starting swash plate compressor comprises a compressor body 1 and a main shaft 2. The compressor body 1 comprises a front cylinder block and a rear cylinder block. The compressor body 1 is sealed by a front cover and a rear cover and can be fixedly connected by long bolts. The main shaft 2 passes through the front cover, the front cylinder block and the rear cylinder block. The compressor body 1 is provided with a mounting slot 3 for mounting the main shaft 2. One end of the main shaft 2 is supported on the front cover and the other end is supported on the cylinder block. A swash plate is provided on the main shaft 2. Slide shoes are provided on both sides of the swash plate. The piston placed in the piston hole on the cylinder block is connected to the swash plate through the slide shoes. The surface of the swash plate is plated with a molybdenum dioxide coating. The improved molybdenum disulfide surface treatment technology makes the swash plate have excellent wear resistance and reduction. Friction characteristics, the dry lock-up time of the swash plate is increased, so that when the compressor is started at low temperature, the lubricating oil has more time to be brought into the working chamber, thereby realizing oil-free starting, which can significantly improve the wear resistance of the swash plate in the oil-free state for a long time, further extend the life of the swash plate, and reduce the loss caused by friction, reducing the risk of wear and damage during startup. The end of the main shaft 2 close to the front cover is connected to the pulley 4 that drives the main shaft 2 to rotate. The outer side of the pulley 4 is connected to a primary seal 5 by bolts. The primary seal 5 can prevent the leakage of lubricating oil and the entry of impurities, thereby protecting internal parts and ensuring the normal startup and operation of the pulley 4 transmission system under low temperature conditions.

[0031] like Figure 2-Figure 6As shown, the inner wall of the mounting groove 3 is provided with a receiving groove 31 for accommodating the shaft seal 6. The receiving groove 31 is located between the swash plate bearing and the pulley 4. The shaft seal 6 is sleeved on the main shaft 2 and rotates with the main shaft 2 to effectively prevent leakage of the internal high-pressure medium and ensure the normal operation of the compressor. The shaft seal 6 includes a positioning member 61 and a matching member 62. The material of the positioning member 61 includes but is not limited to graphite, ceramic, and hard alloy. The matching member 62 is made of rubber. A groove 611 for accommodating the matching member 62 is provided on the side of the positioning member 61 close to the pulley 4. The inner surface of the groove 611 is provided with a groove 611 for accommodating the matching member 62. A connecting groove 612 is provided at one end of the wall away from the pulley 4, and the end of the fitting 62 away from the pulley 4 is inserted into the connecting groove 612. A matching groove 621 is provided at one end of the fitting 62 away from the pulley 4. A protrusion 613 is fixedly connected to the bottom wall of the groove 611 of the positioning member 61, and the protrusion 613 is inserted into the matching groove 621, which is conducive to improving the connection stability between the positioning member 61 and the fitting 62. After the fitting 62 is connected to the positioning member 61, a sealing groove 7 is formed on the side of the shaft seal 6 close to the pulley 4. A rubber is provided in the sealing groove 7. The U-shaped secondary seal 8 of the material is extended by extending into the sealing groove 7 and leaving a gap between the secondary seal 8 and the main shaft 2. While ensuring the sealing and dustproof function, it also avoids friction between itself and the main shaft 2 and the mounting groove 3, reduces relative movement, thereby reducing additional wear, improving the dustproof effect, and effectively preventing dust from entering the outer rotating surface of the drive main shaft 2. It can also slow down the wear of the shaft seal 6 and reduce the chance of leakage of high-pressure medium. The secondary seal 8 includes a first plate 81 and a second plate 82. The first plate 81 is located on the side of the second plate 82 close to the main shaft 2. A transition plate 83 is provided at the end of the second plate 82 away from the pulley 4. The end of the transition plate 83 away from the second plate 82 is integrally formed with the first plate 81. The end of the transition plate 83 close to the second plate 82 is arc-shaped. The transition plate 83 is against the positioning member 61, which is conducive to dispersing pressure and reducing damage to the secondary seal 8. The secondary seal 8 can also reduce the risk of the mating member 62 falling off from the groove 611, thereby ensuring the stability and efficiency of the compressor.

[0032] By setting up a multi-stage sealing structure, dust and impurities are effectively prevented from entering the pulley 4 bearing, the damage of impurities to the pulley 4 bearing in a low-temperature environment is reduced, and the additional friction and wear caused by the invasion of impurities are reduced, thereby extending the service life of the pulley 4 and the main shaft 2. At the same time, better starting performance, lower wear rate and higher structural reliability are achieved under low-temperature conditions. The durability and reliability of the compressor in a low-temperature environment are significantly improved, and the frequency of repair and replacement of parts is reduced, thereby reducing long-term maintenance costs.

[0033] Finally, it should be noted that in the description of the present invention, it should be noted that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0034] In the description of this utility model, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] The above description is merely 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 will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An oil-free starting swash plate compressor, comprising a compressor body (1) and a main shaft (2), wherein the compressor body (1) is provided with a mounting groove (3) for mounting the main shaft (2), and characterized in that: The main shaft (2) is provided with a swash plate, and the surface of the swash plate is plated with a molybdenum dioxide coating; One end of the main shaft (2) is connected to a pulley (4) for driving the main shaft (2) to rotate, and a primary seal (5) is detachably connected to the outer side of the bearing of the pulley (4); The main shaft (2) is sleeved with a shaft seal (6) that rotates with the main shaft (2); a circumferential inner wall of the mounting groove (3) is provided with a receiving groove (31) for receiving the shaft seal (6); the receiving groove (31) is located between the swash plate bearing and the pulley (4); A sealing groove (7) is provided on the side of the shaft seal (6) close to the pulley (4), and a secondary sealing element (8) is provided in the sealing groove (7).

2. The oil-free starting swash plate compressor according to claim 1, characterized in that: The shaft seal (6) comprises a positioning piece (61) and a fitting piece (62); a groove (611) for accommodating the fitting piece (62) is provided on a side of the positioning piece (61) close to the pulley (4); a connecting groove (612) is provided on an inner wall of the groove (611) at an end away from the pulley (4); and the end of the fitting piece (62) away from the pulley (4) penetrates into the connecting groove (612).

3. The oil-free starting swash plate compressor according to claim 2, characterized in that: The sealing groove (7) is formed by connecting the matching piece (62) and the positioning piece (61).

4. The oil-free starting swash plate compressor according to claim 3, characterized in that: A matching groove (621) is provided at one end of the matching piece (62) away from the pulley (4); a protrusion (613) is fixedly connected to the inner bottom wall of the groove (611) of the positioning piece (61); and the protrusion (613) penetrates into the matching groove (621).

5. The oil-free starting swash plate compressor according to claim 3, characterized in that: The secondary sealing element (8) comprises a first plate body (81) and a second plate body (82), wherein the first plate body (81) is located on a side of the second plate body (82) close to the main shaft (2).

6. The oil-free starting swash plate compressor according to claim 2, characterized in that: The end of the second plate body (82) away from the pulley (4) is fixedly connected to a transition plate (83), the transition plate (83) abuts against the positioning member (61), and the end of the transition plate (83) away from the second plate body (82) is fixedly connected to the first plate body (81).

7. The oil-free starting swash plate compressor according to claim 5, characterized in that: One end of the transition plate (83) close to the second plate body (82) is arc-shaped.

8. The oil-free starting swash plate compressor according to claim 1, characterized in that: The primary sealing member (5) is connected to the compressor body (1) via bolts.

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