Reciprocating compressor

Abstract

The utility model relates to a reciprocating compressor which comprises a power assembly, a first compression assembly and a second compression assembly. The power assembly comprises a first transmission mechanism, a second transmission mechanism and a power mechanism. The first transmission mechanism is provided with a first transmission shaft connected with a first shaft head. The second transmission mechanism is provided with a second transmission shaft connected with a second shaft head. The first compression assembly comprises a first reciprocating body, a first rolling piece and a piston. The first shaft head is provided with a first guide groove. The second compression assembly comprises a second reciprocating body, a second rolling piece and a cylinder body. The second shaft head is provided with a second guide groove. The power mechanism is used for driving the first rolling piece to move along the first guide groove and the second rolling piece to move along the second guide groove to drive the piston and the cylinder body to move in opposite directions, so that the piston reciprocates relative to the cylinder body. According to the scheme, when the piston moves, the cylinder body is driven to move in the opposite direction, in this way, the compression stroke of the piston is increased, and then the volume efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and particularly to a reciprocating compressor. Background Art

[0002] A reciprocating compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. General reciprocating compressors include crank rocker reciprocating compressors, crank connecting rod reciprocating compressors, or swash plate reciprocating compressors, etc. The above-mentioned reciprocating compressors drive the reciprocating motion of the piston through the swinging of structures such as crank rockers, crank connecting rods, and swash plates, so as to realize the cyclic compression of the fluid in the cylinder.

[0003] However, the design of the piston compression stroke of the above-mentioned reciprocating compressor generally has limitations, resulting in a short compression stroke and poor compression effect of the reciprocating compressor. Summary of the Invention

[0004] Based on this, it is necessary to provide a reciprocating compressor to solve the problems of short compression stroke and poor compression effect of the reciprocating compressor in the related art.

[0005] A reciprocating compressor includes:

[0006] A power assembly, the power assembly includes a first transmission mechanism, a second transmission mechanism, and a power mechanism. The first transmission mechanism and the second transmission mechanism are respectively connected to the two output ends of the power mechanism. The first transmission mechanism is provided with a first transmission shaft, and the end of the first transmission shaft is connected with a first shaft head. The second transmission mechanism is provided with a second transmission shaft, and the end of the second transmission shaft is connected with a second shaft head;

[0007] A first compression assembly, the first compression assembly includes a first reciprocating body, a first rolling member, and a piston. The first rolling member is embedded in the first reciprocating body, the first reciprocating body is connected to the piston, and the first shaft head is provided with a first guide groove along its circumferential surface, and the first rolling member is clamped in the first guide groove;

[0008] A second compression assembly, the second compression assembly includes a second reciprocating body, a second rolling member, and a cylinder block. The second rolling member is embedded in the second reciprocating body, the second reciprocating body is connected to the cylinder block, and the second shaft head is provided with a second guide groove along its circumferential surface, and the second rolling member is clamped in the second guide groove;

[0009] The power mechanism is used to drive the first transmission mechanism and the second transmission mechanism to move simultaneously, so that the first transmission shaft and the second transmission shaft rotate around their respective axes, and the first rolling element moves along the first guide groove relative to the first shaft head, and the second rolling element moves along the second guide groove relative to the second shaft head. The trajectories of the first guide groove and the second guide groove are configured as follows: when the first shaft head rotates to cause the first rolling element to move along the first guide groove, and the second shaft head rotates to cause the second rolling element to move along the second guide groove, the first reciprocating body and the second reciprocating body respectively drive the piston and the cylinder body to move in opposite directions, and cause the piston to reciprocate relative to the cylinder body.

[0010] In one embodiment, the power assembly includes an output shaft, the first transmission mechanism includes a first driving wheel and a first driven wheel, one end of the output shaft is passed through the first driving wheel, the first transmission shaft is passed through the driven wheel, and the driving wheel and the driven wheel are connected to each other in a transmission manner;

[0011] The second transmission mechanism comprises a second driving wheel and a second driven wheel, the end of the output shaft away from the first driving wheel is passed through the second driving wheel, the second transmission shaft is passed through the second driven wheel, and the second driving wheel and the second driven wheel are connected to each other in a transmission manner;

[0012] The power mechanism is used to drive the output shaft to rotate around its axis, so that the first driving wheel and the second driving wheel rotate simultaneously, and respectively drive the first driven wheel and the second driven wheel to rotate, and the first driven wheel and the second driven wheel respectively drive the first transmission shaft and the second transmission shaft to rotate around their respective axes.

[0013] In one embodiment, the first transmission shaft and the second transmission shaft are coaxially arranged, and the first transmission shaft and the output shaft are parallel to each other.

[0014] In one embodiment, the power assembly further includes a first transmission belt and a second transmission belt, the first transmission belt is sleeved on the first driving wheel and the second driven wheel, the second transmission belt is sleeved on the second driving wheel and the second driven wheel, and the first transmission belt and the second transmission belt are arranged parallel to each other.

[0015] In one embodiment, the trajectory of the first guide groove is a closed curve surrounding the first shaft head for one week, the trajectory of the second guide groove is a closed curve surrounding the second shaft head for one week, and the closed curve trajectories of the first guide groove and the second guide groove have wave crests and wave troughs. The wave crests and wave troughs of the first guide groove are distributed at intervals in the circumferential direction of the circumferential surface of the first shaft head around the axis direction of the first shaft head, and the wave crests and wave troughs of the second guide groove are distributed at intervals in the circumferential direction of the circumferential surface of the second shaft head around the axis direction of the second shaft head.

[0016] In one embodiment, the piston has a first compression surface and a second compression surface facing away from each other. The first compression surface and the inner wall of one side of the cylinder block form a first working side, and the second compression surface and the inner wall of the other side of the cylinder block form a second working side. When the piston reciprocates relative to the cylinder block, the piston alternately compresses and does work on the first working side and the second working side.

[0017] In one embodiment, the reciprocating compressor further includes a first housing and a second housing. The first housing and the second housing are respectively connected to both sides of the cylinder block. The first housing is provided with a first air inlet and a first air outlet, and the first air inlet and the first air outlet are communicated with the first working side. The second housing is provided with a second air inlet and a second air outlet, and the second air inlet and the second air outlet are communicated with the second working side.

[0018] In one embodiment, the first reciprocating body and the second reciprocating body are respectively provided with a first locking structure and a second locking structure. The first compression assembly further includes a first connecting shaft, and the second compression assembly further includes a second connecting shaft. The first connecting shaft is connected to the piston, and the second connecting shaft is connected to the second housing. One end of the first connecting shaft away from the piston is provided with a first connecting disk, and the first connecting disk is fixed to the first locking structure. One end of the second connecting shaft away from the second housing is provided with a second connecting disk, and the second connecting disk is fixed to the second locking structure.

[0019] In one embodiment, the first transmission shaft, the second transmission shaft, the first connecting shaft, and the second connecting shaft are coaxially arranged.

[0020] In one embodiment, the reciprocating compressor includes a heat dissipation mechanism, and the heat dissipation mechanism is wrapped around the outer surface of the cylinder block.

[0021] In the above reciprocating compressor of the present application, while the first reciprocating body drives the piston to reciprocate, the second reciprocating body drives the cylinder block to move relatively. Thus, compared with the form in which the piston compresses the cylinder block unidirectionally, when the movement stroke of the reciprocating body remains unchanged, the first reciprocating body and the second reciprocating body moving in opposite directions can increase the reciprocating movement stroke of the piston relative to the cylinder block, and then a larger compression stroke can be achieved, improving the volumetric efficiency of the cylinder block and thus enhancing the compression effect of the reciprocating compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural diagram of a reciprocating compressor in an embodiment of the present application.

[0023] Figure 2 is Figure 1 a left view of the reciprocating compressor shown.

[0024] Figure 3 is Figure 2 a sectional view of the reciprocating compressor shown at A - A.

[0025] Figure 4 is Figure 1 a schematic diagram of a partial structure in the reciprocating compressor shown.

[0026] Figure 5 is Figure 4 a schematic diagram of a partial structure in the reciprocating compressor shown.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS

[0028] 10. Reciprocating compressor; 100. Power assembly; 110. First transmission mechanism; 111. First transmission shaft; 111a. First shaft head; 111b. First guide groove; 112. First driving wheel; 113. First driven wheel; 114. First transmission belt; 115. First bearing assembly; 120. Second transmission mechanism; 121. Second transmission shaft; 121a. Second shaft head; 121b. Second guide groove; 122. Second driving wheel; 123. Second driven wheel; 124. Second transmission belt; 125. Second bearing assembly; a1. Peak; a2. Trough; 130. Power mechanism; 140. Output shaft; 200. First compression assembly; 210. First reciprocating body; 220. First rolling member; 230. Piston; 231. First compression surface; 232. Second compression surface; 231a. First working side; 240. First locking structure; 250. First connecting shaft; 251. First connecting disk; 260. First perforation structure; 270. First guide rod assembly; 300. Second compression assembly; 310. Second reciprocating body; 320. Second rolling member; 330. Cylinder block; 340. Second locking structure; 350. Second connecting shaft; 351. Second connecting disk; 360. Second perforation structure; 370. Second guide rod assembly; 400. First housing; 410. First air inlet; 420. First air outlet; 500. Second housing; 510. Second air inlet; 520. Second air outlet; 600. Heat dissipation mechanism; 700. First valve plate; 800. Second valve plate; 900. Third perforation structure; 1000. Third guide rod assembly. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0031] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0035] Referring to Figure 1 , Figure 1 FIG. shows a schematic structural diagram of a reciprocating compressor 10 in an embodiment of the present application. The reciprocating compressor 10 of an embodiment includes a power assembly 100, a first compression assembly 200, and a second compression assembly 300.

[0036] Combined with Figure 3 as shown,Figure 3 As Figure 2 shown, a cross-sectional view of the reciprocating compressor 10 at A-A. Among them, the power assembly 100 includes a first transmission mechanism 110, a second transmission mechanism 120, and a power mechanism 130. The first transmission mechanism 110 and the second transmission mechanism 120 are respectively connected to both output ends of the power mechanism 130. The first transmission mechanism 110 is provided with a first transmission shaft 111, and a first shaft head 111a is connected to the end of the first transmission shaft 111; the second transmission mechanism 120 is provided with a second transmission shaft 121, and a second shaft head 121a is connected to the end of the second transmission shaft 121.

[0037] Continuing to refer to Figure 3 , the first compression assembly 200 includes a first reciprocating body 210, a first rolling member 220, and a piston 230. The first rolling member 220 is embedded in the first reciprocating body 210. The first reciprocating body 210 is connected to the piston 230. The second compression assembly 300 includes a second reciprocating body 310, a second rolling member 320, and a cylinder block 330. The second rolling member 320 is embedded in the second reciprocating body 310. The second reciprocating body 310 is connected to the cylinder block 330.

[0038] Continuing to refer to Figure 5 , the first shaft head 111a is provided with a first guide groove 111b along its circumferential surface, and the first rolling member 220 is clamped in the first guide groove 111b. The second shaft head 121a is provided with a second guide groove 121b along its circumferential surface, and the second rolling member 320 is clamped in the second guide groove 121b. The power mechanism 130 is used to drive the first transmission mechanism 110 and the second transmission mechanism 120 to move simultaneously, so that the first transmission shaft 111 and the second transmission shaft 121 rotate around their respective axes, and the first rolling member 220 moves relative to the first shaft head 111a along the first guide groove 111b, and the second rolling member 320 moves relative to the second shaft head 121a along the second guide groove 121b.

[0039] The trajectories of the first guide groove 111b and the second guide groove 121b are configured such that when the first shaft head 111a rotates to cause the first rolling member 220 to move along the first guide groove 111b, and the second shaft head 121a rotates to cause the second rolling member 320 to move along the second guide groove 121b, the first reciprocating body 210 and the second reciprocating body 310 respectively drive the piston 230 and the cylinder block 330 to move in opposite directions, and the piston 230 reciprocates relative to the cylinder block 330.

[0040] In the above reciprocating compressor 10 of the present application, while the first reciprocating body 210 drives the piston 230 to reciprocate, the second reciprocating body 310 drives the cylinder block 330 to move relatively. Thus, compared with the form in which the piston 230 compresses the cylinder block 330 unidirectionally, when the movement stroke of the reciprocating body remains unchanged, the first reciprocating body 210 and the second reciprocating body 310 moving in opposite directions can increase the stroke of the reciprocating movement of the piston 230 relative to the cylinder block 330, and then a larger compression stroke can be achieved, improving the volumetric efficiency of the cylinder block 330 so as to improve the compression effect of the reciprocating compressor 10.

[0041] Specifically, in the traditional compression technology for the fluid in the cylinder block 330, generally, the cylinder block 330 is stationary and the piston 230 reciprocates and compresses within the cylinder block 330. Therefore, in the traditional compression form, a complete compression movement stroke is equal to the movement stroke of the reciprocating body driving the piston 230. In the present application, since the cylinder block 330 can also be driven by the second reciprocating body 310 to reciprocate, and the movement direction of the cylinder block 330 is opposite to that of the piston 230, it can be understood that a complete compression movement stroke includes the movement stroke of the first reciprocating body 210 driving the piston 230, plus the movement stroke of the second reciprocating body 310 driving the cylinder block 330. Then, the movement stroke of the piston 230 relative to the cylinder block 330 is increased by the movement stroke of the second reciprocating body 310 driving the cylinder block 330 compared with the movement stroke of the traditional piston 230. Thus, when the reciprocating movement stroke of the reciprocating body remains unchanged, the reciprocating compressor 10 of the embodiment of the present application can obtain a larger compression stroke, which is beneficial to improving the volumetric efficiency of the cylinder block 330 and further improving the compression effect of the reciprocating compressor 10.

[0042] It should be noted that the volumetric efficiency is usually used to describe the performance of pumps, engines or other devices. The volumetric efficiency is defined as the ratio of the actual working flow rate of the device under specific conditions to its theoretical maximum flow rate. In the field of engines, especially in internal combustion engines, the volumetric efficiency refers to the ratio of the actual volume of the mixed gas inhaled by the cylinder during the intake stroke to its theoretical volume. This ratio can represent the air intake capacity of the engine, that is, the ratio of the volume of the gas inhaled into the cylinder during each intake stroke to the displacement of the cylinder under one atmospheric pressure. Therefore, the volumetric efficiency is an important indicator for measuring the air intake or conveying capacity of the device.

[0043] The length of the above compression stroke has a great influence on the volumetric efficiency of the cylinder block 330. Generally, when the compression stroke is relatively short, the volumetric efficiency of the cylinder block 330 is generally low. Therefore, while the first reciprocating body 210 drives the piston 230 to reciprocate, the second reciprocating body 310 drives the cylinder block 330 to move in the opposite direction. Thus, without changing the movement stroke of the piston 230, compared with the form in which the piston 230 compresses the cylinder block 330 unidirectionally, the reciprocating compressor 10 of the present application can be designed with a larger compression stroke, improving the volumetric efficiency and further enhancing the compression effect of the reciprocating compressor 10.

[0044] Further, in the above reciprocating compressor 10, through the setting of the mutual engagement between the first shaft head 111a and the first rolling member 220, and the mutual engagement between the second shaft head 121a and the second rolling member 320, the control of the power mechanism 130 for the output shaft 140 to rotate around the axis is realized, and it is transformed into the control of the piston 230 to reciprocate along the axis direction. This control method is simple and reliable, effectively improving the driving efficiency of the piston 230. Even further, by the way of the output shaft 140 rotating around its axis, the characteristics of the output shaft 140 having two ends for output can be utilized, and the first compression assembly 200 and the second compression assembly 300 are respectively arranged at both ends of the output shaft 140, so as to realize that the first reciprocating body 210 and the second reciprocating body 310 respectively drive the piston 230 and the cylinder block 330 to move in opposite directions, enabling the piston 230 to reciprocate relative to the cylinder block 330 and improving the compression effect of the reciprocating compressor 10.

[0045] Specifically, the above power mechanism 130 can be an electric motor, a hydraulic driving device, a pneumatic driving device, etc., as long as it can drive the output shaft 140 to rotate around its axis. Preferably, the above power mechanism 130 is an electric motor.

[0046] In addition, both the above first rolling member 220 and the second rolling member 320 can be spherical balls. Since when the first shaft head 111a and the second shaft head 121a rotate, the first rolling member 220 and the second rolling member 320 respectively move along the first guide groove 111b and the second guide groove 121b, adopting spherical balls for the first rolling member 220 and the second rolling member 320 can reduce the frictional force between the first rolling member 220 and the second rolling member 320 and the wall surfaces of the first guide groove 111b and the second guide groove 121b respectively, thereby enhancing the smoothness of the first shaft head 111a and the second shaft head 121a respectively driving the first reciprocating body 210 and the second reciprocating body 310 to reciprocate.

[0047] Combined with Figure 3As shown, in some embodiments, the power assembly 100 includes an output shaft 140. The first transmission mechanism 110 includes a first driving wheel 112 and a first driven wheel 113, one end of the output shaft 140 is inserted through the first driving wheel 112, the first transmission shaft 111 is inserted through the driven wheel, and the driving wheel and the driven wheel are connected to each other. The second transmission mechanism 120 includes a second driving wheel 122 and a second driven wheel 123, one end of the output shaft 140 away from the first driving wheel 112 is inserted through the second driving wheel 122, the second transmission shaft 121 is inserted through the second driven wheel 123, and the second driving wheel 122 and the second driven wheel 123 are connected to each other.

[0048] Furthermore, the power mechanism 130 is used to drive the output shaft 140 to rotate around its axis, so that the first driving wheel 112 and the second driving wheel 122 rotate at the same time, and respectively drive the first driven wheel 113 and the second driven wheel 123 to rotate, and the first driven wheel 113 and the second driven wheel 123 respectively drive the first transmission shaft 111 and the second transmission shaft 121 to rotate around their respective axes.

[0049] Specifically, in this embodiment, the driving method of driving the driving wheel (including the first driving wheel 112 and the second driving wheel 122) through the power mechanism 130 to drive the driven wheel (including the first driven wheel 113 and the second driven wheel 123) to rotate, on the one hand, helps to simplify the connection structure between the power mechanism 130 and the compression assembly (including the first compression assembly 200 and the second compression assembly 300), realizes the simple and reliable transmission of the power mechanism 130, and optimizes the structural layout. On the other hand, the direct connection between the power mechanism 130 and the compression assembly is likely to cause uneven vibration of the power structure. The above-mentioned driving method of driving the driving wheel through the power mechanism 130 to drive the driven wheel to rotate helps to avoid the direct connection of the power mechanism 130 to the compression assembly, thereby helping to reduce the vibration transmission of the power mechanism 130 to the compression assembly and improve the working stability.

[0050] It should be noted that the conventional crankshaft rocker compressor, crank connecting rod compressor or swash plate compressor utilizes the reciprocating swing of its eccentric structure to realize the reciprocating motion control of the piston 230. This control method is inefficient and causes great damage to the vibration and friction of the structure. The present application uses the driving method of the power mechanism 130 to drive the driving wheel to drive the driven wheel to rotate, which first helps to optimize the structural layout and driving form and reduce structural vibration. In addition, the present application provides a first shaft head 111a and a second shaft head 121a at the ends of the first transmission shaft 111 and the second transmission shaft 121, respectively, and utilizes the first guide groove 111b of the first shaft head 111a and the second guide groove 121b of the second shaft head 121a to respectively drive the piston 230 and the cylinder body 330 to reciprocate in opposite directions. The eccentric control method is abandoned, the structure is simplified, and the convenience of control is improved.

[0051] Therefore, compared with traditional crank rocker compressors, crank connecting rod compressors or swash plate compressors, the reciprocating compressor 10 of the present application achieves that the axial direction of the first transmission shaft 111, the movement direction of the first reciprocating body 210, and the compression direction of the piston 230 are kept consistent, and the axial direction of the second transmission shaft 121, the movement direction of the second reciprocating body 310, and the movement direction of the cylinder block 330 are kept consistent. This helps to reduce the vibration and friction damage between structures and improve the working reliability of the structure. In addition, by using the feature that the power mechanism 130 is offset relative to the first compression assembly 200 and the second compression assembly 300, it helps to avoid the direct drive of the power mechanism 130, thereby reducing vibration transmission and optimizing the structural layout.

[0052] In some embodiments, the first transmission shaft 111 and the second transmission shaft 121 are coaxially arranged. Such an arrangement can ensure that the movement directions of the cylinder block 330 and the piston 230 are on the same axis, thereby ensuring the compression effect of the reciprocating compressor 10. Moreover, the first transmission shaft 111 and the output shaft 140 are parallel to each other. This helps to reduce the transmission angle deviation between the output shaft 140 and the first driving wheel 112, the output shaft 140 and the second driving wheel 122, the first transmission shaft 111 and the first driven wheel 113, and the second transmission shaft 121 and the second driven wheel 123, eliminate the resistance between structures, reduce friction, and thus improve the transmission efficiency. At the same time, it also helps to reduce the vibration caused by the transmission angle deviation and improve the operating stability of the reciprocating compressor 10.

[0053] Combined with Figure 3 As shown, in some embodiments, the power assembly 100 further includes a first transmission belt 114 and a second transmission belt 124. The first transmission belt 114 is sleeved on the first driving wheel 112 and the second driven wheel 123, and the second transmission belt 124 is sleeved on the second driving wheel 122 and the second driven wheel 123. The first transmission belt 114 and the second transmission belt 124 are arranged in parallel with each other. This helps to improve the transmission effect between the driving wheel and the driven wheel. Specifically, in this embodiment, the first transmission belt 114 and the second transmission belt 124 can be multi-wedge belts or toothed belts, etc.

[0054] Combined with Figure 4As shown, in some embodiments, the locus of the first guide groove 111b is a closed curve that surrounds the first shaft head 111a for one week. The locus of the second guide groove 121b is a closed curve that surrounds the second shaft head 121a for one week, and the closed curve loci of the first guide groove 111b and the second guide groove 121b have a wave crest a1 and a wave trough a2. The wave crest a1 and the wave trough a2 of the first guide groove 111b are spaced apart in the axial direction of the first shaft head 111a on the circumferential surface of the first shaft head 111a. The wave crest a1 and the wave trough a2 of the second guide groove 121b are spaced apart in the axial direction of the second shaft head 121a on the circumferential surface of the second shaft head 121a.

[0055] Specifically, the number of the wave crest a1 and the wave trough a2 can be designed according to actual needs. For example, when the rotational speeds of the first shaft head 111a and the second shaft head 121a are constant, by increasing the number of the wave crest a1 and the wave trough a2, the reciprocating motion frequency of the first reciprocating body 210 and the second reciprocating body 310 can be increased, and further the reciprocating compression motion frequency between the piston 230 and the cylinder block 330 can be increased. Conversely, when the rotational speeds of the first shaft head 111a and the second shaft head 121a are constant, by reducing the number of the wave crest a1 and the wave trough a2, the reciprocating motion frequency of the first reciprocating body 210 and the second reciprocating body 310 can be reduced, and further the reciprocating compression motion frequency between the piston 230 and the cylinder block 330 can be reduced.

[0056] Combined with Figure 5 As shown, in some embodiments, the number of both the wave crest a1 and the wave trough a2 is set to 2, and the wave crest a1 and the wave trough a2 are evenly distributed at 90 degrees around the axis of the shaft head. In this way, within one rotation of the shaft head, the first reciprocating body 210 and the second reciprocating body 310 can reciprocate in opposite directions 2 times respectively, which not only ensures the rationality of the structural arrangement but also improves the motion efficiency of the first reciprocating body 210 and the second reciprocating body 310. It can be understood that the settings of the wave crest a1 and the wave trough a2 on the first guide groove 111b should be the same as those on the second guide groove 121b, so as to ensure the accuracy of the relative position of the relative motion between the piston 230 and the cylinder block 330 and avoid misalignment of the relative motion.

[0057] Combined with Figure 3 As shown, in some embodiments, the piston 230 has a first compression surface 231 and a second compression surface 232 that face away from each other. The first compression surface 231 and the inner wall of one side of the cylinder block 330 form a first working side 231a, and the second compression surface 232 and the inner wall of the other side of the cylinder block 330 form a second working side. When the piston 230 reciprocates relative to the cylinder block 330, the piston 230 alternately compresses and does work on the first working side 231a and the second working side.

[0058] It should be noted that the above-mentioned first working side 231a and second working side refer to the compression chambers located on both sides of the piston 230. For exampleFigure 3 As shown, the piston 230 is fully abutted against one inner wall of the cylinder block 330. At this time, the volume of the second working side is zero. Therefore, in Figure 3 only the first working side 231a is shown. It can be understood that when the piston 230 is fully abutted against the other inner wall of the cylinder block 330, at this time, the volume of the first working side 231a is zero, and the volume of the second working side reaches the maximum.

[0059] In this embodiment, the piston 230 has a first compression surface 231 and a second compression surface 232 facing away from each other, so that during the relative movement of the piston 230 and the cylinder block 330, the first compression surface 231 and the second compression surface 232 can respectively perform compression work on the first working side 231a and the second working side. In this way, it can be realized that the piston 230 can perform compression work whether it is moving forward or backward, which helps to improve the work efficiency of the reciprocating compressor 10 and ensure the compression effect.

[0060] Combined with Figure 1 and Figure 3 As shown, in some embodiments, the reciprocating compressor 10 further includes a first housing 400 and a second housing 500. The first housing 400 and the second housing 500 are respectively connected to both sides of the cylinder block 330. The first housing 400 is provided with a first air inlet 410 and a first air outlet 420, and the first air inlet 410 and the first air outlet 420 are communicated with the first working side 231a. The second housing 500 is provided with a second air inlet 510 and a second air outlet 520, and the second air inlet 510 and the second air outlet 520 are communicated with the second working side. In this way, independent air intake and exhaust of the first working side 231a and independent air intake and exhaust of the second working side are realized.

[0061] For the convenience of understanding below, the air intake and exhaust process of the reciprocating compressor 10 shown in Figure 3 will be described.

[0062] In the reciprocating compressor 10 of the present application, since the first reciprocating body 210 can drive the piston 230 to alternately perform reciprocating compression on the first working side 231a and the second working side, during the reciprocating movement of the piston 230 in the cylinder block 330, it includes the process of the first compression surface 231 compressing the left inner wall of the cylinder block 330 and the process of the second compression surface 232 compressing the right inner wall of the cylinder block 330.

[0063] Specifically, taking Figure 3From the perspective shown, when the piston 230 starts to compress leftward from the rightmost side of the cylinder block 330 (the second compression surface 232 abuts against the right inner wall of the cylinder block 330), both the first air inlet 410 and the first air outlet 420 remain closed. At this time, the gas in the first working side 231a is compressed as the piston 230 moves. As the piston 230 continues to compress leftward, the gas pressure in the first working side 231a gradually increases, and finally the gas is discharged through the first air outlet 420. Additionally, during this process, the second air outlet 520 remains closed, and the second air inlet 510 remains open, and the gas to be compressed flows into the second working side through the second air inlet 510.

[0064] When the first compression surface 231 of the piston 230 abuts against the leftmost inner wall of the cylinder block 330, the compression work process of the first working side 231a ends at this time. Then the piston 230 starts to move to the right side and compresses and does work on the second working side.

[0065] When the piston 230 starts to compress rightward from the leftmost side of the cylinder block 330 (the first compression surface 231 abuts against the left inner wall of the cylinder block 330), both the second air inlet 510 and the second air outlet 520 remain closed. At this time, the gas in the second working side is compressed as the piston 230 moves. As the piston 230 continues to compress rightward, the gas pressure in the second working side gradually increases, and finally the gas is discharged through the second air outlet 520. Additionally, during this process, the first air outlet 420 remains closed, and the first air inlet 410 remains open, and the gas to be compressed flows into the first working side 231a through the first air inlet 410.

[0066] The above is the general process of the intake and exhaust of the reciprocating compressor 10. This process can achieve the two-way compression of the piston 230, which helps to improve the compression effect of the reciprocating compressor 10.

[0067] Continue to refer to Figure 3 , in some embodiments, the piston 230 type compressor further includes a first valve plate 700 and a second valve plate 800. The first valve plate 700 is clamped between the first housing 400 and the cylinder block 330, and the second valve plate 800 is clamped between the second housing 500 and the cylinder block 330. Specifically, the first valve plate 700 faces the first compression surface 231 of the piston 230, and the second valve plate 800 faces the second compression surface 232 of the piston 230.

[0068] The first valve plate 700 and the second valve plate 800 respectively serve as the sealing members between the housing and the cylinder block 330, which helps to improve the sealing performance of the intake and exhaust. In some embodiments, first sealing members (not shown) are provided on both sides of the first valve plate 700, and second sealing members (not shown) are provided on both sides of the second valve plate 800, which helps to improve the sealing performance of the piston 230 type compressor and ensure the reliability of the compression of the piston 230.

[0069] In some embodiments, the reciprocating compressor 10 further includes a first intake valve (not shown) and a first exhaust valve (not shown). The first intake valve is disposed at the position of the first intake port 410, and the first exhaust valve is disposed at the position of the first exhaust port 420. The reciprocating compressor 10 further includes a second intake valve (not shown) and a second exhaust valve (not shown). The second intake valve is disposed at the position of the second intake port 510, and the second exhaust valve is disposed at the position of the second exhaust port 520.

[0070] The above-mentioned first intake valve, first exhaust valve, second intake valve and second exhaust valve are respectively used to control the opening and closing of the first intake port 410, the first exhaust port 420, the second intake port 510 and the second exhaust port 520, and the structure is simple and reliable.

[0071] In some embodiments, the first reciprocating body 210 and the second reciprocating body 310 are respectively provided with a first locking structure 240 and a second locking structure 340. The first compression assembly 200 further includes a first connecting shaft 250, and the second compression assembly 300 further includes a second connecting shaft 350. The first connecting shaft 250 is connected to the piston 230, and the second connecting shaft 350 is connected to the second housing 500. One end of the first connecting shaft 250 away from the piston 230 is provided with a first connecting disk 251, and the first connecting disk 251 is fixed to the first locking structure 240, which helps to improve the connection stability between the first connecting shaft 250 and the first reciprocating body 210. One end of the second connecting shaft 350 away from the second housing 500 is provided with a second connecting disk 351, and the second connecting disk 351 is fixed to the second locking structure 340, which helps to improve the connection stability between the second connecting shaft 350 and the second reciprocating body 310, and further improves the working reliability of the reciprocating compressor 10.

[0072] In some embodiments, the first transmission shaft 111, the second transmission shaft 121, the first connecting shaft 250 and the second connecting shaft 350 are coaxially arranged, which helps to ensure the smoothness of the relative movement between the piston 230 and the cylinder block 330.

[0073] Continue to refer to Figure 4 , in some embodiments, the first reciprocating body 210 is provided with a first through-hole structure 260, and the first compression assembly 200 further includes a first guide rod assembly 270, and the first guide rod assembly 270 is disposed through the first through-hole structure 260.

[0074] Specifically, the first guide rod assembly 270 may include a first guide rod and a second guide rod. The first guide rod and the second guide rod are inserted through a first perforation structure 260 located on both sides of the first reciprocating body 210, which helps to improve the stability of the reciprocating motion of the reciprocating body. Understandably, in other embodiments, the first guide rod assembly 270 may further include a third guide rod, a fourth guide rod, etc. The number of guide rods can be designed according to actual structural needs. Specifically, multiple guide rods can be evenly distributed around the axis of the first transmission shaft 111.

[0075] Similarly, continue to refer to Figure 4 , in some embodiments, the second reciprocating body 310 is provided with a second perforation structure 360, and the second compression assembly 300 further includes a second guide rod assembly 370. The second guide rod assembly 370 is inserted through the second perforation structure 360.

[0076] In some embodiments, the reciprocating compressor 10 is further provided with a third perforation structure 900 and a third guide rod assembly 1000. The third perforation structure 900 is provided on the first valve plate 700 and the second valve plate 800. The third guide rod assembly 1000 is inserted through the third perforation structure 900. In this way, during the process of the second reciprocating body 310 driving the cylinder block 330 to move, the cylinder block 330 can move under the guiding action of the first valve plate 700, the second valve plate 800, and the third guide rod assembly 1000, which helps to improve the stability of the reciprocating motion of the cylinder block 330.

[0077] Combined with Figure 3 shown, in some embodiments, the first transmission mechanism 110 further includes a first bearing assembly 115 and a second bearing assembly 125. The first bearing assembly 115 is sleeved on the first transmission shaft 111. The second transmission mechanism 120 further includes a second bearing assembly 125. The second bearing assembly 125 is sleeved on the second transmission shaft 121. The above settings help to improve the bearing effect on the first transmission shaft 111 and the second transmission shaft 121, thereby improving the structural stability of the reciprocating compressor 10 and reducing the vibration impact of the rotation of the first transmission shaft 111 and the second transmission shaft 121 on the reciprocating compressor 10.

[0078] Combined with Figure 3 shown, in some embodiments, the reciprocating compressor 10 includes a heat dissipation mechanism 600. The heat dissipation mechanism 600 is wrapped around the outer surface of the cylinder block 330. Specifically, the heat dissipation mechanism 600 can be composed of multiple heat dissipation fins, so as to discharge the heat of the cylinder block 330 in time.

[0079] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0080] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A reciprocating compressor, characterized in that: include: A power assembly, the power assembly includes a first transmission mechanism, a second transmission mechanism and a power mechanism, the first transmission mechanism and the second transmission mechanism are respectively connected to the output ends on both sides of the power mechanism, the first transmission mechanism is provided with a first transmission shaft, the end of the first transmission shaft is connected with a first shaft head, the second transmission mechanism is provided with a second transmission shaft, the end of the second transmission shaft is connected with a second shaft head; A first compression assembly, the first compression assembly comprising a first reciprocating body, a first rolling member and a piston, the first rolling member being embedded in the first reciprocating body, the first reciprocating body being connected to the piston, the first shaft head being provided with a first guide groove along its circumferential surface, the first rolling member being clamped in the first guide groove; A second compression assembly, the second compression assembly comprises a second reciprocating body, a second rolling member and a cylinder body, the second rolling member is embedded in the second reciprocating body, the second reciprocating body is connected to the cylinder body, the second shaft head is provided with a second guide groove along its circumferential surface, and the second rolling member is clamped in the second guide groove; The power mechanism is used to drive the first transmission mechanism and the second transmission mechanism to move simultaneously, so that the first transmission shaft and the second transmission shaft rotate around their respective axes, and the first rolling element moves along the first guide groove relative to the first shaft head, and the second rolling element moves along the second guide groove relative to the second shaft head. The trajectories of the first guide groove and the second guide groove are configured as follows: when the first shaft head rotates to cause the first rolling element to move along the first guide groove, and the second shaft head rotates to cause the second rolling element to move along the second guide groove, the first reciprocating body and the second reciprocating body respectively drive the piston and the cylinder body to move in opposite directions, and cause the piston to reciprocate relative to the cylinder body.

2. The reciprocating compressor according to claim 1, characterized in that: The power assembly includes an output shaft, the first transmission mechanism includes a first driving wheel and a first driven wheel, one end of the output shaft is passed through the first driving wheel, the first transmission shaft is passed through the driven wheel, and the driving wheel and the driven wheel are connected to each other in a transmission manner; The second transmission mechanism comprises a second driving wheel and a second driven wheel, the end of the output shaft away from the first driving wheel is passed through the second driving wheel, the second transmission shaft is passed through the second driven wheel, and the second driving wheel and the second driven wheel are connected to each other in a transmission manner; The power mechanism is used to drive the output shaft to rotate around its axis, so that the first driving wheel and the second driving wheel rotate simultaneously, and respectively drive the first driven wheel and the second driven wheel to rotate, and the first driven wheel and the second driven wheel respectively drive the first transmission shaft and the second transmission shaft to rotate around their respective axes.

3. The reciprocating compressor according to claim 2, characterized in that: The first transmission shaft and the second transmission shaft are coaxially arranged, and the first transmission shaft and the output shaft are parallel to each other.

4. The reciprocating compressor according to claim 2, characterized in that: The power assembly also includes a first transmission belt and a second transmission belt, the first transmission belt is sleeved on the first driving wheel and the second driven wheel, the second transmission belt is sleeved on the second driving wheel and the second driven wheel, and the first transmission belt and the second transmission belt are arranged parallel to each other.

5. The reciprocating compressor according to claim 1, characterized in that: The trajectory of the first guide groove is a closed curve that surrounds the first shaft head, and the trajectory of the second guide groove is a closed curve that surrounds the second shaft head. The closed curve trajectories of the first guide groove and the second guide groove have crests and troughs. The crests and troughs of the first guide groove are distributed on the circumferential surface of the first shaft head at intervals around the axial direction of the first shaft head, and the crests and troughs of the second guide groove are distributed on the circumferential surface of the second shaft head at intervals around the axial direction of the second shaft head.

6. The reciprocating compressor according to claim 1, characterized in that: The piston has a first compression surface and a second compression surface that are opposite to each other. The first compression surface and an inner wall on one side of the cylinder body constitute a first working side, and the second compression surface and an inner wall on the other side of the cylinder body constitute a second working side. When the piston reciprocates relative to the cylinder body, the piston compresses and works the first working side and the second working side alternately.

7. The reciprocating compressor according to claim 6, characterized in that: The reciprocating compressor also includes a first shell and a second shell, the first shell and the second shell are respectively connected to the two sides of the cylinder body, the first shell is provided with a first air inlet and a first air outlet, the first air inlet and the first air outlet are connected to the first working side, and the second shell is provided with a second air inlet and a second air outlet, the second air inlet and the second air outlet are connected to the second working side.

8. The reciprocating compressor according to claim 7, characterized in that: The first reciprocating body and the second reciprocating body are respectively provided with a first locking structure and a second locking structure, the first compression assembly also includes a first connecting shaft, and the second compression assembly also includes a second connecting shaft, the first connecting shaft is connected to the piston, and the second connecting shaft is connected to the second shell, the first connecting shaft is provided with a first connecting plate at one end away from the piston, and the first connecting plate is fixed to the first locking structure, and the second connecting shaft is provided with a second connecting plate at one end away from the second shell, and the second connecting plate is fixed to the second locking structure.

9. The reciprocating compressor according to claim 8, characterized in that: The first transmission shaft, the second transmission shaft, the first connecting shaft and the second connecting shaft are coaxially arranged.

10. The reciprocating compressor according to claim 1, characterized in that The reciprocating compressor includes a heat dissipation mechanism, and the heat dissipation mechanism is wrapped around the outer surface of the cylinder body.

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