Connecting structure of piston rod and crosshead for labyrinth compressor
By turning the piston rod tail end into a tapered structure in a maze compressor, combined with a tapered clamp, and connecting the step-end stud and lock nut, the problem of poor positioning accuracy of the piston rod and the crosshead connection in the prior art is solved, and a more stable and reliable connection is achieved.
Patent Information
- Application Number
- CN202420731603.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-10
AI Technical Summary
In existing maze compressors, the double nut connection between the piston rod and the cross head has poor positioning accuracy, which cannot guarantee the coaxiality and perpendicularity, resulting in insufficient reliability of threaded connection during rapid reciprocating movement, which is prone to failure.
The piston rod is turned into a tapered structure at the tail end and a tapered clamp is set. The tapered clamp is limited to the tapered clamp. It is connected to the step-end stud between the gland flange and the cross head and the lock nut, and combined with the tension spring and the annular groove to achieve a stable connection between the piston rod and the cross head.
Through the limit matching of the tapered sleeve and the conical structure of the rear end of the piston rod, the coaxiality and end surface perpendicularity of the piston rod and the cross head are ensured, which significantly improves the stability and reliability of the connection and avoids faults caused by loose threads.
Smart Images
Figure CN222596544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved invention of a labyrinth compressor, in particular to an improved invention of a piston rod and a crosshead connection structure for a labyrinth compressor. Background Art
[0002] The connection between the piston rod and the crosshead of the vertical labyrinth piston compressor generally adopts double nut connection. In order to improve the assembly accuracy, the threads need to be ground, which increases the difficulty of processing. In addition, the positioning accuracy of the threads is poor, and the coaxiality and verticality of the connection cannot be well guaranteed. With the rapid reciprocating motion of the piston, the reliability of the threaded connection is a great test. Not only labyrinth compressors, but all kinds of dynamic equipment have cases of failures and accidents caused by loose threads.
[0003] Horizontal compressors also use hydraulic connection, but the prerequisite for hydraulic connection is to make the material undergo spring deformation, which also determines that the size of the piston rod needs to be relatively thin. Therefore, this method is not convenient to implement on vertical labyrinth compressors. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a piston rod and crosshead connection structure for a labyrinth compressor which is easy to install and stable and reliable.
[0005] In order to solve the above technical problems, the utility model is implemented by adopting the following technical solutions: the piston rod and crosshead connection structure of the labyrinth compressor includes a piston rod and a crosshead, and is characterized in that a connecting groove is provided at the upper end of the crosshead, the rear end of the piston rod is matched and extends into the connecting groove, and the rear end of the piston rod is turned into a conical structure and is sleeved with a conical ferrule, the conical structure is limited to below the conical ferrule, the upper end of the crosshead is connected to a gland flange, the conical ferrule is limited to between the gland flange and the crosshead, and the corresponding gland flange and / or the crosshead are matched with a conical ferrule accommodating groove.
[0006] The conical ferrule is a split structure, and an annular groove is provided on the outer circle of the corresponding conical ferrule, and a tension spring is provided.
[0007] The gland flange and the crosshead are connected by a circle of step-end studs and locking nuts, and elastic washers are sleeved on the step-end studs between the locking nut and the crosshead.
[0008] An adjusting gasket is arranged at the bottom of the connecting groove, and the rear end of the piston rod abuts against the adjusting gasket.
[0009] The beneficial effect of the utility model is that the improved labyrinth compressor piston rod and crosshead connection structure positions the rear end of the piston rod in the connection groove of the crosshead, specifically, a tapered ferrule and a tapered structure at the rear end of the piston rod are mutually limited, and the tapered ferrule is limited on the crosshead by a gland flange, thereby realizing the connection between the piston rod and the crosshead, and a stop is used for positioning, which greatly ensures the coaxiality and end face verticality of the two components. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.
[0011] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0012] The accompanying drawings show the structure of the utility model, and the following is a further description of its relevant details in conjunction with the accompanying drawings. In this embodiment, the labyrinth compressor piston rod and crosshead connection structure includes a piston rod 1 and a crosshead 2, the upper end of the crosshead 2 is provided with a connection groove 3, the rear end of the piston rod 1 matches and extends into the connection groove 3, and the rear end of the piston rod 1 is turned into a tapered structure 4, and a tapered ferrule 5 is sleeved, the tapered structure 4 is limited to below the tapered ferrule 5, avoiding the material stress concentration problem caused by the sudden change in the size of the thread backing groove or the hydraulic connection clamping step, and greatly improving the overall uniform force of the piston rod 1; the upper end of the crosshead 2 is connected with a gland flange 6, the tapered ferrule 5 is limited to between the gland flange 6 and the crosshead 2, and the corresponding gland flange 6 and / or the crosshead 2 are matched with a tapered ferrule 5 accommodating groove 7, that is, the gland flange 6 is provided with an accommodating groove 7 alone, or the crosshead 2 is provided with an accommodating groove 7 alone, or both are provided with an accommodating groove 7 at the same time, so as to meet the accommodating limit of the tapered ferrule 5, and the specific setting is selected according to the actual production needs.
[0013] As a further improved specific implementation method, the conical ferrule 5 is a split structure, and an annular groove is provided on the outer circle of the corresponding conical ferrule 5, and a tensioning spring 8 is provided. The tensioning spring 8 is tightened in the annular groove to complete the assembly of the split conical ferrule 5, so as to facilitate the conical ferrule 5 to be assembled on the tail end of the piston rod 1.
[0014] As a further improved specific implementation method, the gland flange 6 and the crosshead 2 are connected by a circle of step-end studs 9 and locking nuts 10, and an elastic gasket 11 is sleeved on the step-end studs 9 between the locking nut 10 and the crosshead 2 to achieve a stable connection and anti-loosening between the two.
[0015] As a further improved specific implementation, an adjusting gasket 12 is provided at the bottom of the connecting groove 3, and the tail end of the piston rod 1 abuts against the adjusting gasket 12. By setting the adjusting gasket 12, the tightness of the fitting between the tail end of the piston rod 1 and the connecting groove 3 is ensured.
[0016] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A piston rod and crosshead connection structure for a labyrinth compressor, comprising a piston rod and a crosshead, characterized in that: The upper end of the crosshead is provided with a connecting groove, and the tail end of the piston rod is matched and extended into the connecting groove, and the tail end of the piston rod is turned into a conical structure and is sleeved with a conical ferrule, and the conical structure is limited to be located below the conical ferrule, and the upper end of the crosshead is connected to a gland flange, and the conical ferrule is limited to be located between the gland flange and the crosshead, and the corresponding gland flange and / or the crosshead are matched with a conical ferrule accommodating groove.
2. The piston rod and crosshead connection structure for a labyrinth compressor according to claim 1, characterized in that: The conical ferrule is a split structure, and an annular groove is provided on the outer circle of the corresponding conical ferrule, and a tension spring is provided.
3. The piston rod and crosshead connection structure for a labyrinth compressor according to claim 1, characterized in that: The gland flange and the crosshead are connected by a circle of step-end studs and locking nuts, and elastic washers are sleeved on the step-end studs between the locking nut and the crosshead.
4. The piston rod and crosshead connection structure for a labyrinth compressor according to claim 1, characterized in that: An adjusting gasket is arranged at the bottom of the connecting groove, and the rear end of the piston rod abuts against the adjusting gasket.