Reciprocating piston compressor

Abstract

The reciprocating piston compressor is characterized in that a first-stage combined annular valve is embedded in the top end of a piston cavity of a first-stage air cylinder body, one end of a first-stage connecting rod is rotationally connected to a piston pin in a piston of the first-stage air cylinder, and the other end of the first-stage connecting rod is rotationally connected to the middle of a crankshaft; a second-stage combined annular valve is embedded in the top end of a piston cavity of the second-stage air cylinder body. One end of a second-stage connecting rod is rotationally connected to a piston pin in a second-stage air cylinder piston, and the other end of the second-stage connecting rod is rotationally connected to the middle of a crankshaft. One end of the crankshaft is rotationally connected into a hole, provided with an end cover, of the machine body through a rotating bearing, a distance ring I is arranged between the end cover and the rotating bearing, and a distance ring II is arranged on the inner side of the rotating bearing; the other end of the crankshaft is rotationally connected into a hole, provided with a transparent cover, of the machine body through a rotating bearing, the crankshaft extends out of the transparent cover, an oil retainer is arranged between the transparent cover and the rotating bearing, and an oil seal is embedded in the surface, making contact with the crankshaft, of the transparent cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, concretely relates to a reciprocating piston compressor. BACKGROUND

[0002] The reciprocating piston compressor is designed, and the reciprocating piston compressor is one kind of volumetric compressor, is the compression machinery that utilizes piston in cylinder to extrude fluid, makes fluid pressure improve and discharges. The thermal power, power calculation is the basic in the compressor design calculation, and it is the most important work, according to the composition, gas volume, pressure parameter requirement provided by user, obtains the relevant parameter of compressor, such as series, column, cylinder size, shaft power after calculation. The force condition of piston compressor is obtained after power calculation. Accurately analyze the force condition of unit, it is very important to eliminate the vibration of unit. Under the condition of variable working condition, it needs to realize the accounting of whether the flywheel of original design meets the operation requirement quickly. The result of thermal power calculation, power calculation of piston compressor will provide the original data for each component graphics and basic design, and the accuracy degree of its calculation result reflects the design level of compressor, and it is a topic in the research of compressor. SUMMARY

[0003] Therefore, the utility model provides a reciprocating piston compressor to solve the above -mentioned problems in prior art. In order to realize the above -mentioned purpose, the utility model provides the following technical scheme: according to the first aspect of the utility model, a reciprocating piston compressor, including primary cylinder cover, primary combination annular valve, primary cylinder body, primary cylinder piston, piston pin, primary connecting rod, secondary cylinder cover, secondary cylinder body, secondary cylinder piston, secondary combination annular valve, secondary connecting rod, end cover, fixed distance ring one, fuselage, fixed distance ring two, crankshaft, rotating bearing, oil baffle, transparent cover, oil seal;

[0004] The fuselage has a hollow accommodating cavity, and the upper portions of the fuselage are connected with the primary cylinder body and the secondary cylinder body respectively, and the primary cylinder body and the secondary cylinder body are both provided with a piston cavity in communication with the accommodating cavity;

[0005] A primary cylinder piston is slidably connected in the piston cavity of the primary cylinder body, and a primary combination annular valve is embedded at the top end of the piston cavity of the primary cylinder body, and a primary cylinder cover is arranged at the top of the primary combination annular valve, and one end of a primary connecting rod is rotatably connected to a piston pin in the primary cylinder piston, and the other end is rotatably connected to the middle portion of the crankshaft;

[0006] A secondary cylinder piston is slidably connected in the piston cavity of the secondary cylinder body, and a secondary combination annular valve is embedded at the top end of the piston cavity of the secondary cylinder body, and a secondary cylinder cover is arranged at the top of the secondary combination annular valve, and one end of a secondary connecting rod is rotatably connected to a piston pin in the secondary cylinder piston, and the other end is rotatably connected to the middle portion of the crankshaft;

[0007] One end of the crankshaft is rotatably connected in the hole of the machine body provided with an end cover through a rotating bearing, a distance ring one is arranged between the end cover and the rotating bearing, and the inner side of the rotating bearing is provided with a distance ring two;

[0008] The other end of the crankshaft is rotatably connected in the hole of the machine body provided with a transparent cover through a rotating bearing, and the crankshaft transmits the transparent cover, an oil baffle ring is arranged between the transparent cover and the rotating bearing, and the surface of the transparent cover contacting the crankshaft is embedded with an oil seal.

[0009] Further, the piston ring A and the piston ring B are arranged, the outer side surface of the first-stage cylinder piston is recessed to be provided with the piston ring A, and the outer side surface of the second-stage cylinder piston is recessed to be provided with the piston ring B.

[0010] Further, the first-stage connecting rod is provided with a connecting rod small-end bushing on the outer circumferential side in the first-stage cylinder piston.

[0011] Further, the second-stage connecting rod is provided with a connecting rod small-end bushing on the outer circumferential side in the second-stage cylinder piston.

[0012] Further, the side wall of the machine body is inserted with a rod type oil mark.

[0013] Further, the oil discharging bolt is detachably installed at the bottom of the side wall of the machine body through a sealing oil ring.

[0014] Further, the first-stage connecting rod is installed on the crankshaft through a connecting rod bolt, and the connecting rod is provided with a thin-wall bearing bush at the connecting position of the first-stage connecting rod and the crankshaft.

[0015] Further, the second-stage connecting rod is installed on the crankshaft through a connecting rod bolt, and the connecting rod is provided with a thin-wall bearing bush at the connecting position of the second-stage connecting rod and the crankshaft.

[0016] Further, the flywheel and the elastic shaft pin coupling are installed on the part of the crankshaft inside the transparent cover.

[0017] The utility model has the following advantages:

[0018] 1. Wide pressure range, can reach the required pressure regardless of flow size;

[0019] 2. High thermal efficiency, low unit power consumption;

[0020] 3. Strong adaptability, wide exhaust range, not affected by pressure, can adapt to a wide pressure range and refrigeration capacity requirements;

[0021] 4. Strong maintainability;

[0022] 5. Low material requirements, mostly using ordinary steel materials, easy to process, and low cost;

[0023] 6. Mature technology, rich production and use experience.

[0024] 7. The device system is simple. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 A longitudinal sectional view of a reciprocating piston compressor is provided for some embodiments of the present application.

[0026] Fig. 2 A transverse sectional view of a reciprocating piston compressor is provided for some embodiments of the present application.

[0027] In the figure, 1 is a primary cylinder cover, 2 is a primary combined ring valve, 3 is a primary cylinder body, 4 is a primary cylinder piston, 5 is a connecting rod small head bushing, 6 is a piston pin, 7 is a primary connecting rod, 8 is a secondary cylinder cover, 9 is a secondary combined ring valve, 10 is a piston ring B, 11 is a secondary connecting rod, 12 is a rod type oil mark, 13 is an oil discharging bolt, 14 is a sealing oil ring, 15 is a connecting rod bolt, 16 is a thin-wall bearing bush, 17 is a piston ring A, 18 is an elastic shaft pin coupling, 19 is a flywheel, 21 is an end cover, 22 is a fixed distance ring one, 23 is a machine body, 24 is a fixed distance ring two, 25 is a crankshaft, 26 is a rotating bearing, 27 is an oil retaining ring, 28 is a transparent cover, 29 is an oil seal, 30 is a secondary cylinder body, and 31 is a secondary cylinder piston. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail by specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0029] Embodiment 1

[0030] As Figs. 1-2The utility model discloses a reciprocating piston compressor, including primary cylinder cover 1, primary combination annular valve 2, primary cylinder body 3, primary cylinder piston 4, piston pin 6, primary connecting rod 7, secondary cylinder cover 8, secondary cylinder body 30, secondary cylinder piston 31, secondary combination annular valve 9, secondary connecting rod 11, end cover 21, fixed distance ring one 22, fuselage 23, fixed distance ring two 24, crankshaft 25, rotary bearing 26, oil baffle 27, transparent cover 28, oil seal 29, the fuselage 23 has hollow containing cavity, and the upper portion of fuselage 23 is connected with primary cylinder body 3 and secondary cylinder body 30 respectively, and primary cylinder body 3 and secondary cylinder body 30 are all set up with the piston cavity that communicates with containing cavity, the piston cavity in primary cylinder body 3 is slidably connected with primary cylinder piston 4, and the piston cavity top end of primary cylinder body 3 is embedded with primary combination annular valve 2, and the top of primary combination annular valve 2 is provided with primary cylinder cover 1, and one end of primary connecting rod 7 is rotatably connected on piston pin 6 in primary cylinder piston 4 and the other end is rotatably connected in the middle part of crankshaft 25, the piston cavity in secondary cylinder body 30 is slidably connected with secondary cylinder piston 31, and the piston cavity top end of secondary cylinder body 30 is embedded with secondary combination annular valve 9, and the top of secondary combination annular valve 9 is provided with secondary cylinder cover 8, and one end of secondary connecting rod 11 is rotatably connected on piston pin 6 in secondary cylinder piston 31 and the other end is rotatably connected in the middle part of crankshaft 25, one end of crankshaft 25 is rotatably connected in the hole of fuselage 23 provided with end cover 21 through rotary bearing 26, and fixed distance ring one 22 is arranged between end cover 21 and the rotary bearing 26, and the inside of rotary bearing 26 is provided with fixed distance ring two 24, the other end of crankshaft 25 is rotatably connected in the hole of fuselage 23 provided with transparent cover 28 through rotary bearing 26 and the crankshaft 25 transmits transparent cover 28, and oil baffle 27 is arranged between transparent cover 28 and the rotary bearing 26, and oil seal 29 is embedded on the surface of transparent cover 28 contact crankshaft 25.

[0031] In the above embodiment, it needs to be explained that when the crankshaft rotates, the piston does reciprocating motion through the transmission of connecting rod, and the working volume composed of the inner wall of cylinder, cylinder cover and piston top surface will change periodically. When the piston starts to move from the cylinder cover, the working volume in the cylinder gradually increases, at this time, the gas enters the cylinder along the intake pipe and pushes away the intake valve until the working volume reaches the maximum, and the intake valve is closed. When the piston moves reversely, the working volume in the cylinder decreases, and the gas pressure increases. When the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve opens, and the gas is discharged from the cylinder until the piston moves to the limit position, and the exhaust valve is closed. When the piston moves reversely again, the above process repeats. In summary, the piston reciprocates once when the crankshaft rotates one round, and the processes of intake, compression and exhaust are realized in the cylinder in succession, that is, one working cycle is completed.

[0032] The technical effects achieved by the above-mentioned embodiment are that the reciprocating piston compressor provided by the embodiment significantly improves the sealing performance of the connection between the crankshaft 25 and the machine body 23 by arranging the distance ring 1 22, the distance ring 2 24, the oil baffle ring 27 and the oil seal 29.

[0033] Embodiment 2

[0034] As shown in the figure, a reciprocating piston compressor comprises all the contents of Embodiment 1, in addition to which, the outer side surface of the first-stage cylinder piston 4 is recessed to be provided with the piston ring A 17, and the outer side surface of the second-stage cylinder piston 31 is recessed to be provided with the piston ring B 10. Figs. 1-2

[0035] Optionally, the first-stage connecting rod 7 is arranged on the outer circumferential side in the first-stage cylinder piston 4 to be provided with the connecting rod small-end bushing 5.

[0036] Optionally, the second-stage connecting rod 11 is arranged on the outer circumferential side in the second-stage cylinder piston 31 to be provided with the connecting rod small-end bushing 5.

[0037] The technical effects achieved by the above-mentioned embodiment are that the piston ring A 17 and the piston ring B 10 are arranged to improve the oil scraping performance of the first-stage cylinder piston 4 and the second-stage cylinder piston 31, and the connecting rod small-end bushing 5 is arranged to improve the service life of the first-stage connecting rod 7 and the second-stage connecting rod 11.

[0038] Embodiment 3

[0039] As shown in the figure, a reciprocating piston compressor comprises all the contents of Embodiment 2, in addition to which, the sidewall of the machine body 23 is inserted with the rod-type oil mark 12. Figs. 1-2 Optionally, the oil discharging bolt 13 is detachably installed at the bottom of the sidewall of the machine body 23 through the sealing oil ring 14.

[0040] The technical effects achieved by the above-mentioned embodiment are that the rod-type oil mark 12 plays a good indicating role, and the sealing oil ring 14 arranged at the oil discharging bolt 13 improves the sealing performance of the oil discharging port.

[0041] Embodiment 4

[0042] As shown in the figure, a reciprocating piston compressor comprises all the contents of Embodiment 3, in addition to which, the first-stage connecting rod 7 is installed on the crankshaft 25 through the connecting rod bolt 15, and the connecting position of the first-stage connecting rod 7 and the crankshaft 25 is provided with the thin-wall bearing bush 16.

[0043] Figs. 1-2 Optionally, the second-stage connecting rod 11 is installed on the crankshaft 25 through the connecting rod bolt 15, and the connecting position of the second-stage connecting rod 11 and the crankshaft 25 is provided with the thin-wall bearing bush 16.

[0044]

[0045] ​​​The technical effects achieved by the above embodiment are: by arranging the connecting rod bolt 15, the quick mounting and dismounting of the primary connecting rod 7 and the secondary connecting rod 11 on the crankshaft 25 is achieved; by arranging the thin-wall bearing bush 16, the wear resistance between the primary connecting rod 7 and the secondary connecting rod 11 and the crankshaft 25 is improved.

[0046] Embodiment 5

[0047] As Figs. 1-2 shown, a reciprocating piston compressor comprising all the contents of Embodiment 4, in addition to this, the flywheel 19 and the elastic shaft pin coupling 18 are mounted on the part of the crankshaft 25 inside the cover 28.

[0048] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0052] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace and transform the above embodiments within the scope of the utility model.

[0053] In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0054] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A reciprocating piston compressor, characterized in that, Includes a first-stage cylinder head (1), a first-stage combined annular valve (2), a first-stage cylinder body (3), a first-stage cylinder piston (4), a piston pin (6), a first-stage connecting rod (7), a second-stage cylinder head (8), a second-stage cylinder body (30), a second-stage cylinder piston (31), a second-stage combined annular valve (9), a second-stage connecting rod (11), an end cap (21), a first spacer ring (22), a machine body (23), a second spacer ring (24), a crankshaft (25), a rotating bearing (26), an oil baffle ring (27), a through cover (28), and an oil seal (29); The fuselage (23) has a hollow cavity. The upper part of the fuselage (23) is connected to a first-stage cylinder body (3) and a second-stage cylinder body (30). Both the first-stage cylinder body (3) and the second-stage cylinder body (30) have piston chambers that communicate with the cavity. A first-stage cylinder piston (4) is slidably connected in the piston chamber of the first-stage cylinder body (3). A first-stage combined annular valve (2) is embedded at the top of the piston chamber of the first-stage cylinder body (3). A first-stage cylinder head (1) is provided at the top of the first-stage combined annular valve (2). One end of the first-stage connecting rod (7) is rotatably connected to the piston pin (6) in the first-stage cylinder piston (4), and the other end is rotatably connected to the middle of the crankshaft (25). A secondary cylinder piston (31) is slidably connected in the piston chamber of the secondary cylinder body (30). A secondary combined annular valve (9) is embedded at the top of the piston chamber of the secondary cylinder body (30). A secondary cylinder cover (8) is provided on the top of the secondary combined annular valve (9). One end of the secondary connecting rod (11) is rotatably connected to the piston pin (6) in the secondary cylinder piston (31), and the other end is rotatably connected to the middle of the crankshaft (25). One end of the crankshaft (25) is rotatably connected to the hole of the machine body (23) provided with the end cover (21) via the rotating bearing (26). A first spacer ring (22) is provided between the end cover (21) and the rotating bearing (26), and a second spacer ring (24) is provided on the inner side of the rotating bearing (26). The other end of the crankshaft (25) is rotatably connected to the hole of the machine body (23) with a through cover (28) via a rotating bearing (26), and the crankshaft (25) passes through the through cover (28). An oil baffle ring (27) is provided between the through cover (28) and the rotating bearing (26), and an oil seal (29) is embedded on the surface of the through cover (28) that contacts the crankshaft (25).

2. The reciprocating piston compressor according to claim 1, characterized in that, It also includes piston ring A (17) and piston ring B (10). The outer side of the first-stage cylinder piston (4) is recessed with piston ring A (17), and the outer side of the second-stage cylinder piston (31) is recessed with piston ring B (10).

3. The reciprocating piston compressor according to claim 2, characterized in that, The first-stage connecting rod (7) is provided with a connecting rod small end bushing (5) on the outer periphery inside the first-stage cylinder piston (4).

4. The reciprocating piston compressor according to claim 3, characterized in that, The second-stage connecting rod (11) is provided with a connecting rod small end bushing (5) on the outer periphery inside the second-stage cylinder piston (31).

5. The reciprocating piston compressor according to claim 1, characterized in that, A rod-type oil level indicator (12) is inserted into the side wall of the fuselage (23).

6. The reciprocating piston compressor according to claim 5, characterized in that, The oil unloading bolt (13) is detachably installed on the bottom side wall of the machine body (23) via the sealing oil ring (14).

7. The reciprocating piston compressor according to claim 1, characterized in that, The first-stage connecting rod (7) is mounted on the crankshaft (25) by connecting rod bolts (15), and a thin-walled bearing (16) is provided at the connection between the first-stage connecting rod (7) and the crankshaft (25).

8. The reciprocating piston compressor according to claim 1, characterized in that, The second-stage connecting rod (11) is mounted on the crankshaft (25) by connecting rod bolts (15), and a thin-walled bearing (16) is provided at the connection between the second-stage connecting rod (11) and the crankshaft (25).

9. The reciprocating piston compressor according to claim 1, characterized in that, The crankshaft (25) is mounted on the portion inside the cover (28) with a flywheel (19) and a flexible shaft pin coupling (18).

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