Crosshead structure assembly of diaphragm compressor

Abstract

The utility model discloses a diaphragm compressor crosshead structure assembly, which relates to the technical field of diaphragm compressors and comprises a crosshead body, the upper side and the lower side of the crosshead body are arranged in an arc shape, wear-resistant layers are poured on the upper side and the lower side of the crosshead body, and a mounting hole used for mounting a connecting rod and a step hole used for mounting a piston rod are respectively arranged on two sides of the crosshead body. A crosshead pin is rotationally mounted in the crosshead body, and one end of the connecting rod penetrates through the mounting hole and is arranged on the crosshead pin in a sleeving manner; the wear resistance of the crosshead combination is improved, the service life of equipment is prolonged, the combination structure is simple and convenient, machining and assembling are convenient, the assembling precision can be well guaranteed, and the running stability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm compressors, in particular to a crosshead structure assembly of a diaphragm compressor. Background Art

[0002] Diaphragm compressors are reciprocating compressors that rely on the reciprocating motion of the diaphragm in the cylinder to compress and transport gas. A large number of compressors use closed crossheads with the small end of the connecting rod placed in the crosshead body. A few compressors use open crossheads that match the fork-shaped connecting rod. The connection types between the crosshead and the piston rod are divided into threaded connection, connector connection, flange connection, etc. The crosshead body is connected to the piston and the connecting rod, and reciprocates with the piston driven by the connecting rod. During the high-speed reciprocating motion, the surface of the crosshead body that contacts the slideway is extremely easy to wear; at the same time, the running centers of the crosshead body, connecting rod, and piston must be in a straight line, otherwise it is easy to cause unstable operation of the equipment or even damage, affecting the service life of the equipment. Summary of the invention

[0003] In view of this, the purpose of the utility model is to provide a diaphragm compressor crosshead structural assembly, which increases its wear resistance, improves the assembly accuracy of the crosshead body, connecting rod and piston, and increases the operating stability of the entire combination and the service life of the equipment by optimizing the structure of the crosshead combination.

[0004] The diaphragm compressor crosshead structure assembly provided by the utility model adopts the following technical solutions:

[0005] A diaphragm compressor crosshead structure assembly includes a crosshead body, the upper and lower sides of the crosshead body are arranged in an arc shape and cast with a wear-resistant layer, the two sides of the crosshead body are respectively provided with a mounting hole for installing a connecting rod and a step hole for installing a piston rod, a crosshead pin is rotatably installed in the crosshead body, and one end of the connecting rod passes through the mounting hole and is sleeved on the crosshead pin.

[0006] Furthermore, through holes for installing cross pins are provided at both ends of the cross head body, and bearings are provided at both end mounting sleeves of the cross pin, and the outer ring of the bearing is fixed on the hole wall of the through hole.

[0007] Furthermore, the crosshead body is provided with first pressing plates at the positions of the through holes at both ends, and the first pressing plates are fixed on the crosshead body and located at both ends of the crosshead pin.

[0008] Furthermore, a baffle is provided at one end of the cross pin where the hole is located, and a sealing ring is provided around the baffle.

[0009] Furthermore, a second pressing plate for fixing the piston rod is provided on one side of the crosshead body located at the step hole.

[0010] Furthermore, the step hole and the mounting hole are connected.

[0011] In summary, the utility model has at least one of the following beneficial effects: the wear resistance of the crosshead assembly is increased, the service life of the equipment is improved, the combined structure is simple, easy to process and assemble, the assembly accuracy can be well guaranteed, and the stability of equipment operation is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 for Figure 1 A side cross-sectional view of

[0014] Figure 3 The cross-section of the crosshead body of the utility model embodiment Figure 1 ;

[0015] Figure 4 The cross-section of the crosshead body of the utility model embodiment Figure 2 .

[0016] Description of reference numerals:

[0017] 1; crosshead body; 11; mounting hole; 12; step hole; 13; through hole; 14; first pressure plate; 15; second pressure plate; 16; sealing ring; 2; connecting rod; 3; piston rod; 4; crosshead pin; 41; baffle; 42; sealing ring; 5; bearing. DETAILED DESCRIPTION

[0018] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] The following is combined with Figure 1-4 The utility model is described in further detail.

[0020] The utility model embodiment discloses a diaphragm compressor crosshead structure assembly. Figure 1-4The crosshead structure assembly of the diaphragm compressor includes a crosshead body 1. The crosshead body 1 adopts a base of cast steel ZG230-450. The upper and lower sides of the crosshead body 1 are arranged in an arc shape and cast with a wear-resistant layer in contact with the slideway. The wear-resistant layer is a babbitt alloy with a thickness of ≥0.5mm to increase its wear resistance and heat resistance. The connection surface between the base and the babbitt alloy adopts a plurality of dovetail grooves to make them tightly combined. An oil groove is opened on the outer side of the babbitt alloy for lubrication and heat dissipation. The two sides of the crosshead body 1 are respectively provided with a connecting rod for installing 2 and a step hole 12 for installing the piston rod 3. A crosshead pin 4 is rotatably installed in the crosshead body 1. The crosshead pin 4 is made of GCr15SiMn bearing steel material. One end of the connecting rod 2 passes through the mounting hole 11 and is sleeved on the crosshead pin 4. The end of the connecting rod 2 is provided with an opening for the crosshead pin 4 to pass through and be fixed, which increases the wear resistance of the crosshead combination and improves the service life of the equipment. The combined structure is simple, easy to process and assemble, can well ensure the assembly accuracy, and increase the stability of equipment operation.

[0021] In this embodiment, through holes 13 for installing the cross pin 4 are provided at both ends of the crosshead body 1, and the mounting hole 11 is connected to the through hole 13. Bearings 5 ​​are provided at both ends of the mounting sleeves of the crosshead pin 4. The outer ring of the bearing 5 is fixed on the hole wall of the through hole 13. The rotation of the crosshead pin 4 can drive the bearing 5 to rotate. The bearing 5 can reduce the friction between the crosshead pin 4 and the hole wall of the through hole 13, and the rotation is smoother.

[0022] In this embodiment, the crosshead body 1 is provided with first pressing plates 14 at the positions of the through holes 13 at both ends. The first pressing plates 14 are fixed on the crosshead body 1 and located at both ends of the crosshead pin 4 to limit the crosshead pin 4 in the through holes 13 of the crosshead body 1.

[0023] In this embodiment, annular grooves are provided at both ends of the crosshead body 1, and sealing rings 16 are provided in the annular grooves.

[0024] In this embodiment, a baffle 41 is provided at one end of the cross pin 4 with a hole, and a sealing ring 42 is provided around the baffle 41. The baffle 41 can seal the empty groove of the cross pin 4 to prevent oil from entering the sealing ring 42, thereby increasing the sealing performance.

[0025] In this embodiment, the crosshead body 1 is provided with a second pressure plate 15 for fixing the piston rod 3 on one side of the step hole 12. The piston rod 3 is fixed to the crosshead body 1 by the second pressure plate 15. The reciprocating motion of the piston rod 3 causes the second pressure plate 15 to be subjected to axial impact. In order to increase the service life of the second pressure plate 15, the second pressure plate 15 is made of GCr15SiMn bearing steel material.

[0026] In this embodiment, the step hole 12 and the mounting hole 11 are connected to facilitate the circulation of lubricating oil.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A diaphragm compressor crosshead structure assembly, characterized in that: The invention comprises a crosshead body (1), wherein the upper and lower sides of the crosshead body (1) are arranged in an arc shape and cast with a wear-resistant layer, and the two sides of the crosshead body (1) are respectively provided with a mounting hole (11) for mounting a connecting rod (2) and a step hole (12) for mounting a piston rod (3), and a crosshead pin (4) is rotatably mounted in the crosshead body (1), and one end of the connecting rod (2) passes through the mounting hole (11) and is sleeved on the crosshead pin (4).

2. The diaphragm compressor crosshead structure assembly according to claim 1, characterized in that: Through holes (13) for mounting a cross pin (4) are provided at both ends of the cross head body (1), and mounting sleeves at both ends of the cross pin (4) are provided with bearings (5), and the outer ring of the bearing (5) is fixed on the hole wall of the through hole (13).

3. The diaphragm compressor crosshead structure assembly according to claim 2, characterized in that: The crosshead body (1) is provided with first pressing plates (14) at the positions of the through holes (13) at both ends. The first pressing plates (14) are fixed on the crosshead body (1) and are located at both ends of the crosshead pin (4).

4. The diaphragm compressor crosshead structure assembly according to claim 3, characterized in that: A baffle (41) is provided at one end of the cross pin (4) with a hole, and a sealing ring (42) is provided on the peripheral side of the baffle (41).

5. The diaphragm compressor crosshead structure assembly according to claim 1, characterized in that: A second pressing plate (15) for fixing the piston rod (3) is provided on one side of the crosshead body (1) located at the step hole (12).

6. The diaphragm compressor crosshead structure assembly according to claim 1, characterized in that: The step hole (12) and the mounting hole (11) are connected to each other.

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