Gas bearing, compressor and engine

Abstract

The present disclosure relates to the technical field of compressors, and particularly relates to a gas bearing and a compressor. The gas bearing comprises a cylinder and a piston, an end of the piston and the other end of the cylinder form a compression cavity, and the piston can reciprocate between a first position and a second position; there is a gap between the outer wall of the piston and the inner wall of the cylinder, and the piston is internally provided with a gas storage cavity, and the gas storage cavity is in communication with the inside of the cylinder. The gas bearing provided by the embodiment of the present disclosure adjusts the pressure in the cylinder by using the gas intake and gas discharge of the gas storage cavity, and realizes the function of a one-way valve by adjusting the pressure in the cylinder. The gas bearing does not need to use a mechanical valve to realize the function of a one-way valve, avoids affecting the normal use of the gas bearing due to the damage of a one-way mechanical valve plate in the use process, improves the safety of the gas bearing, and prolongs the service life of the gas bearing.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of compressors, in particular to a gas bearing, a compressor and an engine. BACKGROUND

[0002] With the development of technology, the application of linear compressor technology gradually shifts from military, aerospace and other fields to civilian fields, and the application range is continuously expanding. Linear compressors adopt advanced technologies such as linear motor driving, plate spring support and gap sealing, and have the advantages of compact structure, light weight, oil-free, fewer moving parts, high reliability, low noise, low vibration, less wear and long service life. In particular, by adopting a gas bearing, the moving parts are eliminated, and the fatigue life is improved.

[0003] A gas bearing uses gas as a "lubricant" to form a "gas film" between the shaft and the shaft sleeve. The gas bearing uses gas to separate the surfaces of two parts that are in relative motion and easy to contact by a certain distance, and replaces the dry friction between solid surfaces with wet friction of gas and solid surfaces. It is an ideal supporting element that avoids direct contact between the contact surface and the stationary surface, and has the characteristics of low friction, no pollution, high rotation accuracy, and can work at low and high temperatures. In existing gas bearings, a one-way mechanical valve plate needs to be installed, which is easy to damage the one-way mechanical valve plate during use, affecting the normal use of the gas bearing. SUMMARY

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a gas bearing, a compressor and an engine.

[0005] The present disclosure provides a gas bearing, comprising a cylinder and a piston, the piston is inserted into the cylinder from one end of the cylinder along the axial direction and forms a compression cavity between the end of the piston and the other end of the cylinder, and the piston can reciprocate between a first position and a second position; there is a gap between the outer wall of the piston and the inner wall of the cylinder, a gas storage cavity is arranged inside the piston, and a first gas hole and a second gas hole communicating with the gas storage cavity are arranged on the side wall of the piston; a first communication channel is arranged inside the cylinder, the first end of the first communication channel communicates with the gap, and the second end of the first communication channel communicates with the compression cavity; when the piston is located at the second position, the first end of the first communication channel communicates with the first gas hole to charge the gas storage cavity, and when the piston moves between the first position and the second position, the first end of the first communication channel is staggered with the first gas hole, and the gas storage cavity discharges to the gap.

[0006] Optionally, the diameter of the first gas hole is larger than the diameter of the second gas hole.

[0007] Optionally, the second gas holes are arranged in multiple groups, and the multiple groups of second gas holes are arranged along the axial direction of the piston, and each group of second gas holes is arranged along the circumferential direction of the piston.

[0008] Optionally, the first gas holes are arranged along the circumferential direction of the piston.

[0009] Optionally, the first gas hole is arranged between two groups of second gas holes.

[0010] Optionally, the first communication channel comprises a first channel, a second channel and a third channel, the first channel is in communication with the gap, the second channel is in communication with the compression cavity, and the third channel is arranged inside the cylinder, and the two ends of the third channel are in communication with the first channel and the second channel, respectively.

[0011] Optionally, the first channel is equal in number to the first gas holes and is arranged correspondingly.

[0012] Optionally, the cylinder is further provided with a gas outlet, and the gas outlet is in communication with the compression cavity and the outside of the cylinder.

[0013] Optionally, when the piston is in the first position, the first channel is located between the first gas hole and the second gas hole located on one side of the first gas hole; and when the piston is in the second position, the first channel is opposite to the first gas hole.

[0014] Optionally, the first channel and the second channel are arranged along the radial direction of the cylinder, and the third channel is arranged along the axial direction of the cylinder.

[0015] The present disclosure also provides a gas bearing, comprising a cylinder and a piston, the piston is inserted into the cylinder along the axial direction from one end of the cylinder and forms a compression cavity between the end of the piston and the other end of the cylinder, and the piston can reciprocate between a first position and a second position.

[0016] There is a gap between the outer wall of the piston and the inner wall of the cylinder, a gas storage chamber is arranged in the side wall of the cylinder, and a third gas hole and a fourth gas hole are arranged on the inner surface of the side wall of the cylinder and are in communication with the gas storage chamber; the inside of the piston is provided with a second communication channel, the first end of the second communication channel is in communication with the gap, and the second end of the second communication channel is in communication with the compression cavity.

[0017] When the piston is in the second position, the first end of the second communication passage is in communication with the third gas hole, and the gas chamber is filled with gas; when the piston moves between the first position and the second position, the first end of the second communication passage is staggered with the third gas hole, and the gas chamber discharges gas into the gap.

[0018] The disclosure also provides a compressor comprising the above gas bearing.

[0019] The disclosure also provides an engine comprising the above gas bearing.

[0020] Compared with the prior art, the technical scheme provided by the embodiments of the disclosure has the following advantages:

[0021] The gas bearing provided by the embodiments of the disclosure comprises a cylinder and a piston, the piston is inserted into the cylinder from one end of the cylinder in the axial direction and forms a compression cavity between the end of the piston and the other end of the cylinder, the piston can reciprocate between a first position and a second position, there is a gap between the outer wall of the piston and the inner wall of the cylinder, the piston is internally provided with a gas storage cavity, the side wall of the piston is provided with a first gas hole and a second gas hole in communication with the gas storage cavity, the cylinder is internally provided with a communication passage, the first end of the communication passage is in communication with the gap, and the second end of the communication passage is in communication with the compression cavity; when the piston is in the second position, the first end of the communication passage is in communication with the first gas hole, and the gas storage cavity is filled with gas; when the piston moves between the first position and the second position, the first end of the communication passage is staggered with the first gas hole, and the gas storage cavity discharges gas into the gap. The gas bearing adjusts the pressure in the cylinder by using the gas intake and discharge of the gas storage cavity, realizes the function of a one-way valve by adjusting the pressure in the cylinder, does not need to use a mechanical valve to realize the function of a one-way valve, avoids affecting the normal use of the gas bearing due to damage of the mechanical valve in the use process, improves the safety of the gas bearing, and prolongs the service life of the gas bearing. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the disclosure, and together with the specification, serve to explain the principles of the disclosure.

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 A schematic view of the first gas bearing described in the embodiments of the disclosure when the piston is in the first position;

[0025] Figure 2A schematic view of the first gas bearing according to the embodiment of the present disclosure, in which the piston is in a middle position;

[0026] Figure 3 A schematic view of the first gas bearing according to the embodiment of the present disclosure, in which the piston is in another middle position;

[0027] Figure 4 A schematic view of the first gas bearing according to the embodiment of the present disclosure, in which the piston is in a second position;

[0028] Figure 5 A schematic view of the second gas bearing according to the embodiment of the present disclosure, in which the piston is in a first position;

[0029] Figure 6 A schematic view of the second gas bearing according to the embodiment of the present disclosure, in which the piston is in a middle position;

[0030] Figure 7 A schematic view of the second gas bearing according to the embodiment of the present disclosure, in which the piston is in another middle position;

[0031] Figure 8 A schematic view of the second gas bearing according to the embodiment of the present disclosure, in which the piston is in a second position.

[0032] Wherein, 1, cylinder; 101, first communication channel; 102, compression cavity; 103, gas storage chamber; 104, third gas hole; 105, fourth gas hole; 12, gap; 2, piston; 201, first gas hole; 202, second gas hole; 203, gas storage cavity; 204, second communication channel; 3, gas outlet. DETAILED DESCRIPTION

[0033] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other different manners from those described herein; obviously, the embodiments in the description are only some embodiments of the present disclosure, not all the embodiments.

[0035] As Figure 1As shown, this embodiment of the present disclosure provides a gas bearing, including a cylinder 1 and a piston 2. The piston 2 is inserted into the cylinder 1 axially from one end of the cylinder 1, forming a compression chamber 102 between the end of the piston 2 and the other end of the cylinder 1. The piston 2 can reciprocate between a first position a and a second position b. There is a gap 12 between the outer wall of the piston 2 and the inner wall of the cylinder 1. The piston 2 is provided with a gas storage chamber 203. The side wall of the piston 2 is provided with a first air hole 201 and a second air hole 202 communicating with the gas storage chamber 203. The cylinder 1 is provided with a first connecting channel 101. The first end of the first connecting channel 101 communicates with the gap 12, and the second end of the first connecting channel 101 communicates with the compression chamber 102. When the piston 2 is in the second position b, the first end of the first connecting channel 101 communicates with the first air hole 201 to fill the gas storage chamber 203. When the piston 2 moves between the first position a and the second position b, the first end of the first connecting channel 101 is offset from the first air hole 201, and the gas storage chamber 203 releases gas into the gap 12.

[0036] This gas bearing uses the air intake and exhaust of the air storage chamber 203 to adjust the pressure inside the cylinder 1. By adjusting the pressure inside the cylinder 1, it achieves the function of a one-way valve. This gas bearing can achieve the function of a one-way valve without the need for a mechanical valve, avoiding the impact of mechanical valve damage on the normal use of the gas bearing during use, improving the safety of the gas bearing, and extending the service life of the gas bearing.

[0037] Specifically, such as Figure 1 As shown, when piston 2 is in the first position a, that is, when piston 2 is moved to its outermost position, the compression chamber 102 formed between the tail end of piston 2 and cylinder 1 is at its maximum. The pressure in the gas storage chamber 203 is greater than the pressure in cylinder 1. The gas in the gas storage chamber 203 enters the gap 12 through the first air hole 201 and the second air hole 202, and then enters the first connecting channel 101 and the compression chamber 102 through the gap 12. Figure 2 As shown, as the compression process of piston 2 proceeds, piston 2 moves towards the bottom of cylinder 1, and when it reaches a position similar to... Figure 2 At the position shown, the pressure inside the compression chamber 102 increases due to compression, but it is still less than the pressure inside the gas storage chamber 203. The gas storage chamber 203 continues to release air into the compression chamber 102 and the first connecting channel 101. Figure 3 As shown, as the compression process of piston 2 continues, piston 2 continues to move towards the bottom of cylinder 1. When it moves to the position shown in the image, piston 2 continues to move towards the bottom of cylinder 1. Figure 3 At the position shown, the pressure in the compression chamber 102 is equal to the pressure in the storage chamber 203. The gas in the storage chamber 203 enters the gap 12 through the first air hole 201 and the second air hole 202, and the gas in the first connecting channel 101 also enters the gap 12; as shown Figure 4As shown, the piston 2 continues to move towards the bottom of the cylinder 1 to the second position b, at which the space of the compression chamber 102 is the smallest and the pressure in the compression chamber 102 reaches the maximum, at this time, the first gas hole 201 is in communication with the first end of the first communication channel 101, and the pressure in the cylinder 1 is greater than the pressure in the storage chamber 203, and the first communication channel 101 charges the storage chamber 203 through the first end and the first gas hole 201 and the second gas hole 202.

[0038] Conversely, when the piston 2 reverses the movement from the second position b to the first position a, as shown, Figure 4 the piston 2 is at the second position b, at which the compression chamber 102 formed between the tail end of the piston 2 and the cylinder 1 is the smallest, and the pressure in the compression chamber 102 is greater than the pressure in the storage chamber 203, the first gas hole 201 is in communication with the first end of the first communication channel 101, and the first communication channel 101 charges the storage chamber 203 through the first end and the first gas hole 201 and the second gas hole 202. As shown, Figure 3 with the continuous movement of the piston 2 towards the first position a, the piston 2 moves away from the bottom of the cylinder 1, and when it moves to the position as shown, Figure 3 the pressure in the compression chamber 102 is equal to the pressure in the storage chamber 203, the gas in the storage chamber 203 enters the gap 12 through the first gas hole 201 and the second gas hole 202, and the gas in the first communication channel 101 also enters the gap 12; as shown, Figure 2 with the continuous movement of the piston 2 towards the first position a, the piston 2 moves away from the bottom of the cylinder 1, and when it moves to the position as shown, Figure 2 the volume of the compression chamber 102 continues to increase, and the pressure decreases, at this time, the pressure in the compression chamber 102 is less than the pressure in the storage chamber 203, the gas in the storage chamber 203 enters the gap 12 through the first gas hole 201 and the second gas hole 202, and enters the first communication channel 101 and the compression chamber 102 through the gap 12; as shown, Figure 1 the piston 2 continues to move away from the bottom of the cylinder 1 to the first position a, and when the piston 2 is at the first position a, that is, the piston 2 moves to the outermost position, at this time, the compression chamber 102 formed between the tail end of the piston 2 and the cylinder 1 is the largest, and the pressure in the storage chamber 203 is greater than the pressure in the cylinder 1, and the storage chamber 203 is in a state of discharging to the compression chamber 102 and the first communication channel 101.

[0039] In some embodiments, the second gas hole 202 is in multiple groups, the multiple groups of second gas holes 202 are arranged in the axial direction of the piston 2, and each group of second gas holes 202 is in multiple numbers, and each group of second gas holes 202 is uniformly distributed in the circumferential direction of the piston 2.

[0040] Specifically, the first gas holes 201 are multiple in number, and the multiple first gas holes 201 are uniformly distributed along the circumference of the piston 2.

[0041] By setting multiple groups of the second gas holes 202, each group of the second gas holes 202 is multiple in number, and the first gas holes 201 are also multiple in number, the multiple first gas holes 201 and the multiple second gas holes 202 are all in communication with the gap 12, which can effectively improve the gas flow speed between the gas storage cavity 203 and the cylinder 1, thereby improving the maximum movement speed of the piston 2.

[0042] In addition, the multiple first gas holes 201 are uniformly distributed, and all the second gas holes 202 in each group of the second gas holes 202 are uniformly distributed, so that the communication between the piston 2 and the cylinder 1 is uniform, thereby making the gas flow between the gas storage cavity 203 and the cylinder 1 uniform, and ensuring that the piston 2 is uniformly stressed.

[0043] Specifically, the first gas holes 201 are arranged between the two groups of the second gas holes 202.

[0044] In some embodiments, the first gas holes 201 have a larger hole diameter than the second gas holes 202.

[0045] When the piston 2 is located at the second position b, the pressure in the gas storage cavity 203 is less than the pressure in the cylinder 1, and the gas enters the gas storage cavity 203 through the first gas holes 201 and the second gas holes 202 close to the compression cavity 102. Since the first gas holes 201 are arranged between the two groups of the second gas holes 202, by setting the hole diameter of the first gas holes 201 to be larger than the hole diameter of the second gas holes 202, the amount of intake air at the position of the first gas holes 201 can be increased, thereby ensuring that the pressure difference at each position in the gas storage cavity 203 is small, i.e., ensuring that the gas in the gas storage cavity 203 is uniformly distributed, and the gas pressure in the gas storage cavity 203 is uniformly distributed.

[0046] In some embodiments, the first communication passage 101 includes a first passage, a second passage, and a third passage, the first passage is in communication with the gap 12, the second passage is in communication with the compression cavity 102, and the third passage is arranged inside the cylinder 1, and the two ends of the third passage are in communication with the first passage and the second passage, respectively.

[0047] By setting the first passage, the compression cavity 102 can be effectively communicated with the first gas holes 201, and the gas flow efficiency between the cylinder 1 and the gas storage cavity 203 can be improved.

[0048] In some embodiments, when the piston 2 is at the first position a, the first passage is located between the first gas holes 201 and the second gas holes 202 on one side of the first gas holes 201; and when the piston 2 is at the second position b, the first passage is directly opposite the first gas holes 201.

[0049] Specifically, the number of first channels and the number of first vents 201 are equal and correspondingly arranged, so that when the piston 2 is in the second position b, the first vents 201 can correspond one-to-one with the first channels, ensuring the stability of gas flow between the first channels and the first vents 201.

[0050] Specifically, the first and second channels are both arranged radially along the cylinder 1, and the third channel is arranged axially along the cylinder 1.

[0051] The first and second channels are arranged radially along the cylinder 1, so that the axes of the first and second channels are perpendicular to the axis of the cylinder 1, which facilitates smooth gas flow between the first channel and the gap 12, and between the second channel and the connecting compression chamber 102.

[0052] In some embodiments, the cylinder 1 is further provided with a gas outlet 3, which connects the compression chamber 102 and the outside of the cylinder 1.

[0053] like Figures 5 to 8 As shown, the structure of the gas bearing provided in this embodiment may also include a cylinder 1 and a piston 2. The piston 2 is inserted into the cylinder 1 from one end along the axial direction and a compression chamber 102 is formed between the end of the piston 2 and the other end of the cylinder 1. The piston 2 can reciprocate between a first position a and a second position b.

[0054] There is a gap 12 between the outer wall of piston 2 and the inner wall of cylinder 1. A gas storage chamber 103 is provided in the side wall of cylinder 1. A third gas hole 104 and a fourth gas hole 105 communicating with the gas storage chamber 103 are provided on the inner surface of the side wall of cylinder 1. A second connecting channel 204 is provided inside piston 2. The first end of the second connecting channel 204 is connected to the gap 12, and the second end of the second connecting channel 204 is connected to the compression chamber 102.

[0055] When piston 2 is in the second position b, the first end of the second connecting channel 204 is connected to the third air hole 104, and air is injected into the air storage chamber 103. When piston 2 moves between the first position a and the second position b, the first end of the second connecting channel 204 is misaligned with the third air hole 104, and air is released into the gap 12 from the air storage chamber 103.

[0056] This gas bearing uses the intake and exhaust of the gas storage chamber 103 to adjust the pressure inside the cylinder 1. By adjusting the pressure inside the cylinder 1, it achieves the function of a one-way valve. This gas bearing can achieve the function of a one-way valve without the need for a mechanical valve, avoiding the impact of mechanical valve damage on the normal use of the gas bearing during use, improving the safety of the gas bearing, and extending the service life of the gas bearing.

[0057] Specifically, such as Figure 5As shown, when the piston 2 is at the first position a, i.e. the piston 2 moves to the outermost position, the compression chamber 102 formed between the tail end of the piston 2 and the cylinder 1 is the largest, the pressure in the gas storage chamber 103 is greater than the pressure in the cylinder 1, the gas in the gas storage chamber 103 enters the gap 12 through the third gas hole 104 and the fourth gas hole 105, and then enters the second communication channel 204 and the compression chamber 102 through the gap 12; as shown in Figure 6 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 6 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 7 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 7 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 8 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in

[0058] Conversely, when the piston 2 reverses its movement from the second position b to the first position a, as shown in Figure 8 As shown, when the piston 2 is at the first position a, i.e. the piston 2 moves to the outermost position, the compression chamber 102 formed between the tail end of the piston 2 and the cylinder 1 is the largest, the pressure in the gas storage chamber 103 is greater than the pressure in the cylinder 1, the gas in the gas storage chamber 103 enters the gap 12 through the third gas hole 104 and the fourth gas hole 105, and then enters the second communication channel 204 and the compression chamber 102 through the gap 12; as shown in Figure 7 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 7 As shown, as the compression process of the piston 2 continues, the piston 2 moves towards the bottom of the cylinder 1, and when it moves to the position as shown in Figure 6As shown, as the piston 2 continues to move towards the first position a, the piston 2 moves away from the bottom of the cylinder 1, and when it reaches the position a... Figure 6 At the indicated position, the volume of the compression chamber 102 continuously increases, and the pressure decreases. At this time, the pressure inside the compression chamber 102 is less than the pressure inside the gas storage chamber 103. The gas inside the gas storage chamber 103 enters the gap 12 through the third air hole 104 and the fourth air hole 105, and then enters the second connecting channel 204 and the compression chamber 102 through the gap 12; as shown Figure 1 As shown, piston 2 continues to move away from the bottom of cylinder 1 to the first position a. When piston 2 is in the first position a, that is, when piston 2 moves to the outermost position, the compression chamber 102 formed between the tail end of piston 2 and cylinder 1 is at its maximum. The pressure in the air storage chamber 103 is greater than the pressure in cylinder 1. The air storage chamber 103 is in a state of releasing air into the compression chamber 102 and the second connecting channel 204.

[0059] In some embodiments, the number of fourth air holes 105 is multiple groups, the multiple groups of fourth air holes 105 are spaced apart along the axial direction of the cylinder 1, and the number of fourth air holes 105 in each group is multiple, and the fourth air holes 105 in each group are evenly distributed along the circumference of the inner wall of the cylinder 1.

[0060] Specifically, there are multiple third air holes 104, which are evenly distributed along the circumference of cylinder 1.

[0061] By setting multiple sets of fourth air holes 105, with each set containing multiple fourth air holes 105, and also multiple third air holes 104, and with multiple third air holes 104 and multiple fourth air holes 105 all connected to the gap 12, the gas flow rate between the gas storage chamber 103 and the cylinder 1 can be effectively improved.

[0062] Furthermore, the multiple third air holes 104 are evenly distributed, and all the fourth air holes 105 in each group of fourth air holes 105 are evenly distributed, so that the gas flow between the gas storage chamber 103 and the cylinder 1 is uniform.

[0063] Specifically, the third vent 104 is located between the two sets of fourth vents 105.

[0064] In some embodiments, the diameter of the third pore 104 is larger than the diameter of the fourth pore 105.

[0065] When the piston 2 is located at the second position b, the pressure in the gas storage chamber 103 is less than the pressure in the cylinder 1, and the gas enters the gas storage chamber 103 through the third gas hole 104 and the fourth gas hole 105 close to the compression chamber 102. Since the third gas hole 104 is arranged between the two groups of fourth gas holes 105, the third gas hole 104 can be arranged to have a larger hole diameter than the fourth gas hole 105, so as to increase the amount of gas entering at the position of the third gas hole 104, thereby ensuring that the pressure difference of the gas in the gas storage chamber 103 is small, that is, the gas in the gas storage chamber 103 is uniformly distributed, and the gas pressure in the gas storage chamber 103 is uniformly distributed.

[0066] In some embodiments, the second communication channel 204 includes two channels, one of which communicates with the gap 12, and the other of which communicates with the compression chamber 102. The channel communicating with the gap 12 is arranged perpendicular to the axis of the piston 2, and both ends of the channel are arranged to have openings on the outer surface of the piston 2, so as to ensure that the second communication channel 204 forms a gas channel between the two gas storage chambers 103 arranged opposite to each other in the cylinder 1, effectively connecting the compression chamber 102 and the third gas hole 104, and improving the gas flow efficiency between the cylinder 1 and the gas storage chamber 103.

[0067] The embodiments of the present disclosure also provide a compressor comprising the above gas bearing.

[0068] The embodiments of the present disclosure also provide an engine comprising the above gas bearing.

[0069] It should be noted that, in this document, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0070] The above description is merely one specific implementation of the present disclosure, which enables a person skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas bearing, characterized by, The cylinder (1) and the piston (2) are included, the piston (2) is inserted into the cylinder (1) from one end of the cylinder (1) and forms a compression cavity (102) between the end of the piston (2) and the other end of the cylinder (1), and the piston (2) can reciprocate between the first position (a) and the second position (b); there is a gap (12) between the outer wall of the piston (2) and the inner wall of the cylinder (1), the inside of the piston (2) is provided with a gas storage cavity (203), and the side wall of the piston (2) is provided with a first gas hole (201) and a second gas hole (202) in communication with the gas storage cavity (203); the inside of the cylinder (1) is provided with a first communication channel (101), the first end of the first communication channel (101) is in communication with the gap (12), and the second end of the first communication channel (101) is in communication with the compression cavity (102); when the piston (2) is located at the second position (b), the first end of the first communication channel (101) is in communication with the first gas hole (201) corresponding to the gas storage cavity (203), and when the piston (2) moves between the first position (a) and the second position (b), the first end of the first communication channel (101) is staggered with the first gas hole (201), and the gas storage cavity (203) discharges gas into the gap (12); The number of the second gas holes (202) is multiple groups, the multiple groups of the second gas holes (202) are arranged in the axial direction of the piston, and the number of each group of the second gas holes (202) is multiple, and each group of the second gas holes (202) is uniformly distributed in the circumferential direction of the piston (2); The number of the first gas holes (201) is multiple, and the multiple first gas holes (201) are uniformly distributed in the circumferential direction of the piston (2); The first gas hole (201) is arranged between the two groups of second gas holes (202), and the aperture of the first gas hole (201) is larger than the aperture of the second gas hole (202).

2. The gas bearing of claim 1, wherein, The first communication channel (101) includes a first channel, a second channel and a third channel, the first channel is in communication with the gap (12), the second channel is in communication with the compression cavity, and the third channel is arranged in the inside of the cylinder (1), and the two ends of the third channel are in communication with the first channel and the second channel respectively.

3. The gas bearing of claim 2, wherein, The number of the first channel and the first gas hole (201) is equal and arranged correspondingly.

4. The gas bearing of claim 1, wherein, The cylinder (1) is also provided with a gas outlet (3), and the gas outlet (3) is in communication with the compression cavity (102) and the outside of the cylinder (1).

5. The gas bearing of claim 2, wherein, When the piston (2) is in the first position (a), the first channel is located between the first gas hole (201) and the second gas hole (202) on one side of the first gas hole (201); when the piston (2) is in the second position (b), the first channel is opposite to the first gas hole (201).

6. The gas bearing of claim 2, wherein, The first channel and the second channel are arranged in the radial direction of the cylinder (1), and the third channel is arranged in the axial direction of the cylinder (1).

7. A gas bearing, characterized by, The gas cylinder (1) and the piston (2) are arranged in the gas cylinder (1) in an axial direction, and a compression cavity (102) is formed between the end of the piston (2) and the other end of the gas cylinder (1), and the piston (2) can reciprocate between a first position (a) and a second position (b); A gap (12) is formed between the outer wall of the piston (2) and the inner wall of the gas cylinder (1), a gas storage cavity (103) is arranged in the side wall of the gas cylinder (1), and a third gas hole (104) and a fourth gas hole (105) are arranged on the inner surface of the side wall of the gas cylinder (1) and communicate with the gas storage cavity (103); a second communication channel (204) is arranged in the piston (2), the first end of the second communication channel (204) communicates with the gap (12), and the second end of the second communication channel (204) communicates with the compression cavity (102); When the piston (2) is in the second position (b), the first end of the second communication channel (204) communicates with the third gas hole (104) correspondingly, the gas storage cavity (103) is filled with gas, and when the piston (2) moves between the first position (a) and the second position (b), the first end of the second communication channel (204) is staggered with the third gas hole (104), and the gas storage cavity (103) discharges gas into the gap (12).

8. A compressor characterized by, The gas bearing comprises the gas bearing according to any one of claims 1-6 or the gas bearing according to claim 7.

9. An engine characterized by, The gas bearing comprises the gas bearing according to any one of claims 1-6 or the gas bearing according to claim 7.

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