A Z-type oil-free multi-stage compression straightening device

Abstract

The invention discloses a Z-type oil-free multi-stage compression straightening device, aiming to provide a Z-type oil-free multi-stage compression straightening device with good anti-jumping effect, simple structure and good lubrication effect. The key points of the technical scheme are as follows: the Z-type oil-free multi-stage compression straightening device is arranged to also include a piston part, a piston rod connected to the piston part and a power part connected to the piston rod in a transmission manner, the power part includes a driving device, a crankshaft connected to the driving device, a connecting rod respectively connected to the crankshaft and the piston rod, and a crosshead arranged outside the piston rod and fixed to a machine body, the crosshead is used to convert the rotation of the crankshaft into a linear transmission, thus forming good structural stability, and by arranging a straightening device on the machine body which is sleeved on the piston rod and is used to eliminate the crosshead bounce of the piston rod, the straightening device eliminates the influence of the crosshead bounce on the piston rod and thus completely eliminates the bounce of the piston, and the invention is applicable to the technical field of compressor accessories.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor accessories, and more specifically, to a Z-type oil-free multi-stage compression straightening device. Background Art

[0002] At present, the existing reciprocating "contact seal" oil-free compressor maintenance center all uses PTEF support rings, as shown in the attached figure of the specification. Figure 2 As shown, the crankshaft rotation line is changed into the reciprocating linear motion of the piston in the cylinder through the crosshead. The vibration caused by the crosshead on the piston is inevitable, causing the support ring of the "contact seal" to wear out prematurely, resulting in unplanned downtime and extremely high maintenance costs.

[0003] The traditional way is to install a PTEF support ring structure on the piston, which not only lengthens the piston part but also the cylinder, further increasing the cost. It cannot completely eliminate the hidden danger of vibration and only works within 2000h-4000h of use. The maintenance cost is a huge expense for the company. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a Z-type oil-free multi-stage compression straightening device with good anti-jumping effect, simple structure and good lubrication effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a Z-type oil-free multi-stage compression straightening device, comprising a body, a piston part, a piston rod connected to the piston part, and a power part connected to the piston rod in a transmission manner, the power part comprising a driving device, a crankshaft connected to the driving device, a connecting rod connected to the crankshaft and the piston rod respectively, and a crosshead arranged outside the piston rod and fixed to the body, the body is provided with a straightening device which is sleeved on the piston rod and is used to eliminate the piston rod from being affected by the crosshead.

[0006] The present invention is further configured as follows: the straightening device comprises a mounting seat arranged on the machine body and a metal sleeve arranged on the mounting seat and sleeved on the outside of the piston rod.

[0007] The present invention is further configured as follows: a plurality of inner grooves A are arranged in an annular pattern on the inner wall of the metal sleeve, a circle of inner grooves B are arranged on the side wall of the mounting seat, and each inner groove A and inner groove B is filled with high-temperature lubricating grease.

[0008] The present invention is further configured as follows: a sealing ring is provided in both the inner groove A and the inner groove B, a sealing sleeve is provided in the sealing ring, a mounting groove with a trapezoidal cross-section is provided on the end face of the sealing ring, a rubber ring matching the trapezoidal mounting groove is provided in the mounting groove, and the high-temperature lubricating grease is filled in the sealing ring.

[0009] The present invention is further configured as follows: the depth of the sealing ring is G1 and the wall thickness is P1; the distance between the upper end face of the sealing sleeve and the upper end face of the sealing ring is G2, G2=G1 / 4, and the wall thickness is P2, P2=P1 / 3; the height of the rubber ring is G3, G3=G1 / 8.

[0010] The present invention is further configured as follows: an oil sealing structure is provided near the end surface of the inner groove A and the inner groove B, and the oil sealing structure includes two sealing members arranged in the inner grooves A and B and arranged opposite to each other, the cross-section of the sealing member is in a "" shape, and an inner cavity is formed by connecting the two sealing members.

[0011] By adopting the above technical scheme, the beneficial effects are as follows: 1. By setting the Z-type oil-free multi-stage compression straightening device to also include a piston part, a piston rod connected to the piston part, and a power part connected to the piston rod, the power part includes a driving device, a crankshaft connected to the driving device, a connecting rod connected to the crankshaft and the piston rod respectively, and a crosshead arranged outside the piston rod and fixed to the body, the crosshead is used to convert the crankshaft rotation into a linear transmission, forming a good structural stability, and by providing a straightening device on the body that is sleeved on the piston rod and is used to eliminate the crosshead bounce of the piston rod, the straightening device adopts the above structural setting, eliminates the influence of the crosshead bounce on the piston rod and thus completely eliminates the bounce of the piston, changes the PTEF support ring structure installed on the traditional piston, thereby greatly improving the service life of the lubricating oil, thereby reducing the length of the piston and the cylinder, improving stability and reducing maintenance costs;

[0012] 2. The straightening device is further configured to include a mounting seat arranged on the machine body and a metal sleeve arranged on the mounting seat and sleeved on the outside of the piston rod. A plurality of inner grooves A are arranged in an annular pattern on the inner wall of the metal sleeve, and a circle of inner grooves B is arranged on the side wall of the mounting seat. Each inner groove A and inner groove B are filled with high-temperature lubricating grease. By matching the mounting seat and the metal sleeve, the metal sleeve structure forms a contact match with the piston rod, and each inner groove A and inner groove B is filled with high-temperature lubricating grease, a good lubrication effect is achieved, and the high-temperature lubricating grease can be dissolved at high temperature, and along with the reciprocating motion of the piston rod, a strong lubricating protective film is formed on the surface of the piston rod, which greatly reduces the wear caused by direct friction between the piston rod and the metal sleeve, thereby protecting the inner wall of the metal sleeve and extending the service life. The utility model is strong and the structure is simple;

[0013] 3. In order to improve the overall sealing effect, a sealing ring is arranged in both the inner groove A and the inner groove B, and a sealing sleeve is arranged in the sealing ring. The sealing sleeve forms an extrusion on the sealing ring, thereby reducing the extrusion of the sealing ring in the running state, thereby ensuring a continuous sealing effect. The practical effect is good and the structure is simple. The end face of the sealing ring is provided with a mounting groove with a trapezoidal cross section, and a rubber ring matching the trapezoidal mounting groove is arranged in the mounting groove. High-temperature lubricating grease is filled in the sealing ring, and under the gradually high temperature state, the high-temperature lubricating grease will gradually form a better oil discharge effect under the high temperature state, further improving the sealing effect. The depth of the sealing ring is G1, the wall thickness is P1, the distance between the upper end face of the sealing sleeve and the upper end face of the sealing ring is G2, G2=G1 / 4, and the wall thickness is P2, P2=P1 / 3; the height of the rubber ring is G3, G3=G1 / 8, and the height of the sealing sleeve is designed to be lower than the sealing ring. This design allows the sealing ring to produce a slight deformation when the piston rod moves, thereby enhancing the contact strength with the metal sleeve and improving the sealing performance. The height of the rubber ring is G3, G3=G1 / 8. Through the interaction between the rubber ring and the sealing ring, the compression deformation energy of the sealing ring can be consumed in the form of frictional heat energy, thereby reducing the deformation of the sealing ring.

[0014] 4. The present invention may also provide an oil sealing structure near the end surface of the inner groove A and the inner groove B, thereby achieving a sealing effect between the inner grooves A and B, and by configuring the oil sealing structure to include two sealing members arranged in the inner grooves A and B and arranged opposite to each other, the cross-section of the sealing member is in a "" shape, and the two sealing members are arranged opposite to each other in the following structure """, so that an inner cavity is connected between the two sealing members, and in the process of realizing oil storage, an effect of gradual oil discharge is also formed, which has strong practicality and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a Z-type oil-free multi-stage compression straightening device embodiment of the present invention.

[0016] Figure 2 The present invention is a schematic cross-sectional view of a metal sleeve and a mounting seat of an embodiment of a Z-type oil-free multi-stage compression straightening device.

[0017] Figure 3 This is an embodiment of a Z-type oil-free multi-stage compression straightening device of the present invention. Figure 2 A schematic diagram of the enlarged structure in the middle.

[0018] Figure 4 It is an enlarged schematic diagram of the structure of Example 2 of a Z-type oil-free multi-stage compression straightening device of the present invention.

[0019] Figure 5 This is a structural diagram of the seal in Example 2 of a Z-type oil-free multi-stage compression straightening device of the present invention.

[0020] Figure 6 It is a schematic diagram of a traditional structure in the background technology.

[0021] The reference numerals in the figure are as follows: 1. machine body; 10. piston part; 11. piston rod; 12. power part; 120. crankshaft; 121. connecting rod; 13. crosshead; 20. mounting seat; 201. inner groove B; 21. metal sleeve; 210. inner groove A; 22. sealing ring; 23. sealing sleeve body; 24. mounting groove; 25. rubber ring; 30. sealing element; 31. inner cavity; 301. round plate end; 302. bending end; 32. embedded groove. DETAILED DESCRIPTION

[0022] Reference Figures 1 to 6 An embodiment of a Z-type oil-free multi-stage compression straightening device of the present invention is further described.

[0023] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0024] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0025] Example 1

[0026] A Z-type oil-free multi-stage compression straightening device comprises a machine body 1, a piston part 10, a piston rod 11 connected to the piston part 10, and a power part 12 connected to the piston rod 11 in a transmission manner, wherein the power part 12 comprises a driving device, a crankshaft 120 connected to the driving device, a connecting rod 121 connected to the crankshaft 120 and the piston rod 11 respectively, and a crosshead 13 arranged outside the piston rod 11 and fixed to the machine body 1, and a straightening device sleeved on the piston rod 11 and used to eliminate the piston rod 11 from being bounced by the crosshead 13 is provided on the machine body 1, and the Z-type oil-free multi-stage compression straightening device is arranged to further comprise a piston part 10, a piston rod 11 connected to the piston part 10, and a power part 12 connected to the piston rod 11 in a transmission manner, wherein the power part 12 comprises a driving device, a crankshaft 120 connected to the driving device, a connecting rod 121 connected to the crankshaft 120 and the piston rod 11 respectively, and a crosshead 13 arranged outside the piston rod 11 and fixed to the machine body 1, and a straightening device sleeved on the piston rod 11 and used to eliminate the piston rod 11 from being bounced by the crosshead 13 is provided on the machine body 1. A driving device, a crankshaft 120 connected to the driving device, a connecting rod 121 connected to the crankshaft 120 and the piston rod 11 respectively, and a crosshead 13 arranged on the outside of the piston rod 11 and fixed to the body 1, the crosshead 13 is used to convert the rotation of the crankshaft 120 into a linear transmission, forming a good structural stability, and by providing a straightening device on the body 1 that is sleeved on the piston rod 11 and is used to eliminate the vibration of the piston rod 11 caused by the crosshead 13. With the above-mentioned structural setting, the straightening device eliminates the influence of the vibration of the crosshead 13 on the piston rod 11 and thus completely eliminates the vibration of the piston, changes the PTEF support ring structure installed on the traditional piston, thereby greatly improving the service life of the lubricating oil, thereby reducing the length of the piston and the cylinder, improving stability and reducing maintenance costs.

[0027] The present invention is further configured such that the straightening device includes a mounting seat 20 disposed on the machine body 1 and a metal sleeve 21 disposed on the mounting seat 20 and sleeved on the outside of the piston rod 11, a plurality of inner grooves A210 are arranged in an annular pattern on the inner wall of the metal sleeve 21, a circle of inner grooves B201 are arranged on the side wall of the mounting seat 20, and each inner groove A210 and inner groove B201 are filled with high-temperature lubricating grease, and the straightening device is further configured to include a mounting seat 20 disposed on the machine body 1 and a metal sleeve 21 disposed on the mounting seat 20 and sleeved on the outside of the piston rod 11, a plurality of inner grooves A210 are arranged in an annular pattern on the inner wall of the metal sleeve 21, a circle of inner grooves B201 are arranged on the side wall of the mounting seat 20, and each inner groove A210 and inner groove B201 are filled with high-temperature lubricating grease. Both the inner groove A210 and the inner groove B201 are filled with high-temperature lubricating grease. By matching the mounting seat 20 and the metal sleeve 21, the metal sleeve 21 structure forms a contact fit with the piston rod 11, and each inner groove A210 and inner groove B201 is filled with high-temperature lubricating grease, thereby achieving a good lubrication effect. Moreover, the high-temperature lubricating grease can be dissolved at high temperature, and along with the reciprocating motion of the piston rod 11, a strong lubricating protective film is formed on the surface of the piston rod 11, which greatly reduces the wear caused by direct friction between the piston rod 11 and the metal sleeve 21, thereby achieving protection of the inner wall of the metal sleeve 21 and extending the service life. It is highly practical and has a simple structure.

[0028] The present invention is further configured such that a sealing ring 22 is provided in both the inner groove A210 and the inner groove B201, a sealing sleeve 23 is provided in the sealing ring 22, a mounting groove 24 with a trapezoidal cross section is provided on the end face of the sealing ring 22, a rubber ring 25 matching the trapezoidal mounting groove 24 is provided in the mounting groove 24, high-temperature lubricating grease is filled in the sealing ring 22, the depth of the sealing ring 22 is G1, and the wall thickness is P1; the distance between the upper end face of the sealing sleeve 23 and the upper end face of the sealing ring 22 is G2, G2=G 1 / 4, the wall thickness is P2, P2=P1 / 3; the height of the rubber ring 25 is G3, G3=G1 / 8. In order to improve the overall sealing effect, a sealing ring 22 is arranged in both the inner groove A210 and the inner groove B201, and a sealing sleeve 23 is arranged in the sealing ring 22. The sealing sleeve 23 squeezes the sealing ring 22, thereby reducing the squeezing of the sealing ring 22 in the running state, thereby ensuring a continuous sealing effect, having good practical effect and simple structure. The end face of the sealing ring 22 is provided with The mounting groove 24 has a trapezoidal cross section, and a rubber ring 25 matching the trapezoidal mounting groove 24 is arranged in the mounting groove 24. The high-temperature lubricating grease is filled in the sealing ring 22, and under the gradually high temperature state, the high-temperature lubricating grease will gradually form a better oil discharge effect under the high temperature state. Further, the depth of the sealing ring 22 is G1, the wall thickness is P1, the upper end surface of the sealing sleeve 23 is G2 from the upper end surface of the sealing ring 22, G2=G1 / 4, and the wall thickness is P2, P2=P1 / 3; The height of the rubber ring 25 is G3, G3=G1 / 8, and the height of the sealing sleeve 23 is designed to be lower than the sealing ring 22. This design allows the sealing ring 22 to produce a slight deformation when moving with the piston rod 11, thereby enhancing the contact strength with the metal sleeve 21 and improving the sealing performance. The height of the rubber ring 25 is G3, G3=G1 / 8. Through the interaction between the rubber ring 25 and the sealing ring 22, the compression deformation energy of the sealing ring 22 can be consumed in the form of frictional heat energy, thereby reducing the deformation of the sealing ring 22.

[0029] Example 2

[0030] The structure of this embodiment is basically the same as that of embodiment 1, and the only difference is that the rubber ring 25 structure is cancelled in embodiment 2, and an oil sealing structure is provided in the inner groove A210 and the inner groove B201 near the end surface, the oil sealing structure includes two sealing members 30 arranged in the inner grooves A210 and B and arranged opposite to each other, the cross-section of the sealing member 30 is in the shape of """, and the two sealing members 30 are connected to form an inner cavity 31. The present invention can also provide an oil sealing structure in the inner grooves A210 and the inner grooves B201 near the end surface, thereby achieving a sealing effect between the inner grooves A210 and B, and by setting the oil sealing structure to include two sealing members 30 arranged in the inner grooves A210 and B and arranged opposite to each other, the cross-section of the sealing member 30 is in the shape of """, and the two sealing members 30 are relatively arranged in the following structure """, so that the two sealing members 30 are connected to form an inner cavity 31, and in the process of realizing oil storage, an effect of gradual oil discharge is also formed, which is highly practical and has a simple structure.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A Z-type oil-free multi-stage compression straightening device, comprising a body (1), characterized in that: The machine body (1) also comprises a piston part (10), a piston rod (11) connected to the piston part (10), and a power part (12) connected to the piston rod (11) in a transmission manner. The power part (12) comprises a driving device, a crankshaft (120) connected to the driving device, a connecting rod (121) connected to the crankshaft (120) and the piston rod (11) respectively, and a crosshead (13). The machine body (1) is provided with a straightening device which is sleeved on the piston rod (11) and is used to eliminate the vibration of the piston rod (11) caused by the crosshead (13). The straightening device comprises a mounting seat (20) arranged on the machine body (1) and a connecting rod (121) which is arranged on the mounting seat (20) and sleeved on the crosshead (13). A metal sleeve (21) outside the plug rod (11) has a plurality of inner grooves B (201) arranged in an annular pattern on its inner wall, and a circle of inner grooves A (210) is arranged on the side wall of the mounting seat (20). Each inner groove A (210) and inner groove B (201) is filled with high-temperature lubricating grease. An oil sealing structure is arranged near the end surface of the inner grooves A (210) and B (201). The oil sealing structure includes two sealing members (30) arranged in the inner grooves A (210) and B and arranged opposite to each other. The cross section of the sealing member (30) is in the shape of a "" and an inner cavity (31) is formed between the two sealing members (30).

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