Supporting device for piston rod of compressor

Abstract

The utility model relates to the technical field of compressor piston rod machining, in particular to a compressor piston rod supporting device. The device comprises a height adjusting mechanism, a support and rolling wheels, the support is installed on the height adjusting mechanism, and the height adjusting mechanism is used for adjusting the height position of the support; the side face of the rolling wheel protrudes upwards out of the top face of the support, and the rotating shaft is arranged in the horizontal direction. The number of the rolling wheels is two, and the two rolling wheels are arranged at intervals in the horizontal radial direction. The height adjusting mechanism is arranged to quickly adjust the height positions of the support and the roller so as to effectively support the piston rod; the piston rod is horizontally and radially limited by arranging the two rolling wheels which are horizontally and radially arranged at intervals, the rolling wheels are driven to rotate in the piston rod thread rolling machining process, the whole device is driven to adaptively and horizontally move, automatic alignment supporting of the piston rod is achieved, the swing amplitude of the piston rod is reduced, and the thread machining precision of the piston rod is improved. The relative abrasion degree between the two is reduced and the production safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor piston rod processing, in particular to a support device for a compressor piston rod. Background Art

[0002] Compressors are widely used in the petrochemical industry, such as in equipment for oil and gas storage and transportation, petroleum refining, and chemical production. As one of the important components of a compressor, the piston rod is used in the cylinder motion execution component of the compressor. It is a moving component with frequent movement and high technical requirements. During its reciprocating movement, it needs to bear alternating forces composed of gas forces and inertial forces, etc. Therefore, high requirements are imposed on the material, machining accuracy, and heat treatment process of the piston rod, especially the coaxiality between the middle sealing section and the two ends of the thread of the piston rod is extremely high. To ensure the performance requirements such as the machining accuracy, thread strength, and surface hardness of the threads on the piston rod, the petroleum industry standard requires that the threads at both ends of the compressor piston rod must be rolled to ensure the equipment reliability of the compressor.

[0003] Currently, a pair of arranged center structures are provided on the thread rolling machine. When processing the threads of the piston rod, the ends of the piston rod extend into the thread rolling machine, and the center structures abut against both ends of the piston rod to position the piston rod. The piston rod is a slender structure, and during the thread processing, the middle part of the piston rod will sag and bend, affecting the thread rolling accuracy and quality. Therefore, a support structure needs to be provided to support the piston rod and reduce the degree of sag and bending deformation of the piston rod. Most of the existing support structures use a clamping and limiting method to position and support the piston rod. The support surface of this support structure often cannot fully fit with the workpiece, and over-support or under-support phenomena are likely to occur. It is not suitable for the processing of piston rods with various outer diameter sizes and does not have universality. During the thread rolling process of the piston rod, the pair of arranged thread rolling wheels perform rolling extrusion operations on the piston rod in the radial direction, which will cause the piston rod to shake and rotate. The above support and positioning structure cannot adapt to the shaking generated during the thread rolling process of the piston rod, which not only affects the thread processing accuracy of the piston rod, but also under the action of the thread rolling wheels, the piston rod will be subjected to multi-directional torques, resulting in phenomena such as thread chipping, piston rod deformation, and even fracture. In addition, when using the above support structure to support piston rods with different outer diameters, the support height of the support structure often needs to be adjusted by adding or reducing gaskets with different thicknesses. During use, it needs to be debugged multiple times, the operation is cumbersome, manpower is wasted, and the production efficiency is affected.

[0004] The patent with the application number CN201721357724.7 discloses a support device for loading and unloading a piston rod, which includes a support beam, a support platform and a cushion block. The support platform is arranged on the upper part of the support beam. There is a groove on the upper part of the support platform, and the cushion block is installed in the groove of the support platform. There is a lifting adjustment mechanism between the support platform and the support beam, and a connection and fixing mechanism for connecting and positioning with a socket is arranged on the side of the support beam. When in use, the lifting adjustment mechanism is adjusted to make the cushion block in the support platform contact the piston rod, and the groove cooperates with the cushion block to support and limit the piston rod. If this device is used to support the piston rod in thread rolling processing, this support device needs to be fixedly installed on the installation platform of the thread rolling machine. Although the device has a simple structure and is convenient to operate, when the piston rod is processed, the device cannot swing adaptively following the swing of the piston rod, which will further cause the swing amplitude at both ends of the piston rod to increase and the processing accuracy to be poor. In addition, during the swinging process of the piston rod, it will also slide relatively and collide with the groove wall and convex edge of the groove, which is easy to scratch the piston rod and affect the finished product quality. Utility Model Content

[0005] The technical problem to be solved by the present utility model is to provide a support device for a compressor piston rod, which can perform horizontal movement adaptively during the thread rolling process of the piston rod, reduce the swing amplitude of the piston rod and continuously provide effective support for the piston rod, and improve the thread rolling processing accuracy and quality of the piston rod.

[0006] The technical solution adopted by the present utility model to solve its technical problems is: a support device for a compressor piston rod, which includes a height adjustment mechanism, a support and rollers. The support is installed on the height adjustment mechanism, and the height adjustment mechanism is used to adjust the height position of the support;

[0007] The rollers are rotatably installed on the support through a rotating shaft. The side surface of the roller protrudes above the top surface of the support, and the rotating shaft is arranged in the horizontal direction;

[0008] There are two rollers, and the two rollers are arranged at intervals along the horizontal radial direction.

[0009] Further, a U-shaped groove with an upward opening is arranged on the support, and a rotating shaft installation hole is arranged on the side wall of the U-shaped groove;

[0010] The roller and the rotating shaft are coaxially arranged and are both located in the U-shaped groove. Both ends of the rotating shaft are installed in the rotating shaft installation hole, and the roller is installed on the rotating shaft.

[0011] Further, a first positioning hole is arranged on the side surface of the rotating shaft, a second positioning hole is arranged on the support, the axis of the second positioning hole is arranged in the up and down direction and is communicated with the rotating shaft installation hole, and a positioning pin is arranged in the second positioning hole, and the positioning pin is inserted into the first positioning hole.

[0012] Furthermore, an elastic anti-slip layer is coated on the outer side surface of the roller.

[0013] Furthermore, the roller is a rolling bearing, and an elastic bearing sleeve is hoop-connected on the outer side surface of the rolling bearing;

[0014] An axial limiting sleeve is sleeved on the rotating shaft in the U-shaped groove. One end of the axial limiting sleeve abuts against the side wall of the U-shaped groove, and the other end of the axial limiting sleeve abuts against the end surface of the inner ring of the rolling bearing;

[0015] There are two axial limiting sleeves, and the two axial limiting sleeves are distributed at both ends of the rolling bearing.

[0016] Furthermore, the height adjusting mechanism includes a base and a height adjusting rod arranged on the base, and the support is installed on the upper part of the height adjusting rod.

[0017] Furthermore, the height adjusting rod is a threaded connecting column, and the threaded connecting column is threadedly connected with the support.

[0018] Furthermore, the base is of a cylindrical or frustum-shaped structure. A limiting hole is provided on the side surface of the base. There are at least two limiting holes, and at least two limiting holes are evenly distributed along the circumferential direction of the base;

[0019] The central axis of the limiting hole is arranged along the radial direction of the base.

[0020] Furthermore, the bottom surface of the base is a smooth plane with a surface roughness Ra less than or equal to 3.2 μm.

[0021] Furthermore, an oil injection hole is provided above the base, and an oil outlet hole communicating with the oil injection hole is provided on the bottom surface of the base.

[0022] Compared with the prior art, the beneficial effects of the utility model are as follows: A compressor piston rod support device is provided. By setting a height adjustment mechanism, the height positions of the support and the roller can be quickly adjusted to enable the roller to effectively support the piston rod. By arranging two rollers horizontally and radially at intervals to form a limiting space, the piston rod is limited in the horizontal radial direction. When the piston rod shakes during the thread rolling process, the roller rotates adaptively, and at the same time drives the entire device to move horizontally adaptively, realizing the automatic alignment support of the utility model relative to the piston rod, reducing the swing amplitude of the end of the piston rod, and improving the thread processing accuracy of the piston rod. In addition, during the production process, the roller and the piston rod are in rolling connection, reducing the relative wear degree between the two, and at the same time avoiding flying debris from hurting people during the wear process, ensuring production safety and improving product quality. By setting the height adjustment rod in the height adjustment mechanism as a threaded connection column to thread-connect the height adjustment mechanism with the support, the device realizes height fine adjustment and self-locking, improving the height adjustment accuracy of the device. The bottom surface of the device is a smooth plane and an oil outlet hole is provided on this bottom surface. An oil injection hole communicating with the oil outlet hole is provided on the device. Oil can be injected through the oil injection hole to the oil outlet hole to provide lubricant for the sliding contact surface between the base and the installation platform, further reducing the friction force between the contact surface of the device and the installation platform, enabling the entire support device to slide horizontally adaptively more smoothly along with the swing of the piston rod, and completing the automatic alignment movement with the piston rod more timely, further improving the thread processing accuracy of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view structural schematic diagram of the utility model;

[0024] Figure 2 is the top view structural schematic diagram of the utility model;

[0025] Figure 3 is the axonometric structural schematic diagram of the utility model;

[0026] Figure 4 is the front view structural schematic diagram of the utility model in the working state;

[0027] Figure 5 is the structural schematic diagram of the height adjustment mechanism in the utility model;

[0028] Figure 6 is the structural schematic diagram of the support in the utility model;

[0029] Reference numerals: 1 - height adjustment mechanism; 11 - base; 12 - height adjustment rod; 13 - limit hole; 2 - support; 21 - rotating shaft installation hole; 3 - roller; 31 - elastic anti-slip layer; 4 - rotating shaft; 41 - axial limit sleeve; 42 - positioning pin; 5 - limiting space; 9 - piston rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0031] As Figure 1-6 shown, a support device for a compressor piston rod includes a height adjustment mechanism 1, a support 2, and rollers 3. The support 2 is installed on the height adjustment mechanism 1, and the height adjustment mechanism 1 is used to adjust the height position of the support 2. The rollers 3 are rotatably installed on the support 2 through a rotating shaft 4. The side surface of the roller 3 protrudes above the top surface of the support 2, and the rotating shaft 4 is arranged in the horizontal direction. There are two rollers 3, and the two rollers 3 are arranged at intervals along the horizontal radial direction. The part of the roller 3 protruding above the top surface of the support 2 is called a protruding part. A limiting space 5 is formed between the two protruding parts, and the minimum gap between the two protruding parts should be less than the outer diameter of the piston rod 9 to ensure that the two rollers 3 effectively support the piston rod 9. In actual production, the minimum distance from the support surface of the roller 3 to the horizontal installation surface of the support platform is generally 60 mm.

[0032] During use, the height adjustment mechanism 1 is arranged on the installation platform outside the thread rolling machine and can move horizontally relative to the installation platform. One end of the piston rod 9 extends into the thread rolling machine, and the other end and the middle section of the piston rod 9 are located in the limiting space 5 between the two rollers 3. The height adjustment mechanism 1 pre-adjusts the rollers 3 to a suitable height so that the rollers 3 support the piston rod 9, and the paired rollers 3 limit the piston rod 9 in the horizontal radial direction. During the thread rolling process of the piston rod 9, under the action of the thread rolling wheel, the piston rod 9 will shake and swing. When the piston rod 9 shakes and swings, the rollers 3 will rotate around the rotating shaft 4, and at the same time drive the entire support device to move horizontally adaptively, so that the entire device automatically aligns with the piston rod 9. After the alignment is completed, the height adjustment mechanism 1 adjusts the height positions of the support 2 and the rollers 3 again to ensure continuous and effective support for the piston rod 9.

[0033] The present utility model quickly adjusts the heights of the support 2 and the rollers 3 by setting the height adjustment mechanism 1 to ensure that the rollers 3 effectively support the piston rod 9. By arranging two rollers 3 at intervals in the horizontal radial direction to form a limiting space 5, when the piston rod 9 shakes during the thread rolling process, the rollers 3 rotate adaptively under the action of the piston rod 9, and the entire device moves horizontally adaptively under the action of the piston rod 9, realizing automatic alignment support of the device relative to the piston rod 9, reducing the swinging amplitude of the end of the piston rod 9, and improving the thread processing accuracy of the piston rod 9. In addition, during the production process, the roller 3 and the piston rod 8 are in rolling connection, reducing the relative wear degree between the two, and at the same time avoiding flying debris from hurting people during the wear process, ensuring production safety and improving product quality.

[0034] The support 2 is used for integrally installing the roller 3, and it can be a frame structure welded by one or more of profiles such as rectangular tubes, channel steels, I-beams, steel plates, etc. Specifically, the support 2 is provided with a U-shaped groove opening upward, and a rotating shaft mounting hole 21 is provided on the side wall of the U-shaped groove; the roller 3 and the rotating shaft 4 are coaxially arranged and are both located in the U-shaped groove, and both ends of the rotating shaft 4 are installed in the rotating shaft mounting hole 21, and the roller 3 is installed on the rotating shaft 4. The roller 3 and the rotating shaft 4 can be fixedly connected by connecting parts such as bolts, pins, set screws, etc. In this case, the rotating shaft 4 and the support 2 should be rotatably connected; the roller 3 can also be rotatably connected to the rotating shaft 4. In this case, the rotating shaft 4 should be fixedly connected to the support 2. Specifically, a first positioning hole is provided on the side surface of the rotating shaft 4, and a second positioning hole is provided on the support 2. The axis of the second positioning hole is arranged in the up-down direction and is communicated with the rotating shaft mounting hole 21. A positioning pin 42 is provided in the second positioning hole, and the positioning pin 42 is inserted into the first positioning hole to prevent the rotating shaft 4 from rotating relative to the support 2 and wearing the rotating shaft mounting hole 21, ensuring the support accuracy of the device, extending the service life of the device, with a simple structure, stable and reliable.

[0035] The roller 3 is used to support the piston rod 9 and attenuate the swinging amplitude of the piston rod ९. The paired rollers 3 are also used for horizontally radially limiting the piston rod 9. Since the compressors involved in the petrochemical industry are relatively large in size, and the corresponding piston rod 9 is also relatively heavy, the roller 3 generally adopts a heavy-duty roller with a maximum load of 3t to ensure that the device can be used for the support and limitation of heavy piston rods 9 and expand the application range of the device.

[0036] Preferably, an elastic anti-slip layer 31 is coated on the outer side surface of the roller 3 to increase the friction force between the roller 3 and the piston rod 9, prevent relative sliding between the piston rod 9 and the roller 3, ensure rolling connection between the piston rod 9 and the roller 3, prevent the surface of the piston rod 9 from being bruised or scratched, and further improve the processing quality of the piston rod 9. The material of the elastic anti-slip layer 31 can be rubber, polyurethane, silica gel, etc. The elastic anti-slip layer 31 can be hoop-mounted or bonded on the outer side surface of the roller 3.

[0037] Preferably, the roller 3 is a rolling bearing, and an elastic bearing sleeve is hoop-mounted on the outer side surface of the rolling bearing, which is convenient to purchase, low in cost, and convenient to install and disassemble. Specifically, an axial limit sleeve 41 is sleeved on the rotating shaft 4 in the U-shaped groove. One end of the axial limit sleeve 41 abuts against the side wall of the U-shaped groove, and the other end of the axial limit sleeve 41 abuts against the end face of the inner ring of the rolling bearing; two axial limit sleeves 41 are provided, and the two axial limit sleeves 41 are distributed at both ends of the rolling bearing. By providing the axial limit sleeve 41, the roller 3 is axially limited to prevent the roller 3 from moving axially and rubbing against the side wall of the U-shaped groove, ensuring the reliability of the device.

[0038] The height adjustment mechanism 1 is used to arrange the support 2 and the roller 3 on the installation platform. Specifically, the height adjustment mechanism 1 includes a base 11 and a height adjustment rod 12 arranged on the base 11, and the support 2 is installed on the upper part of the height adjustment rod 12. During use, the base 11 is arranged on the installation platform and can move horizontally relative to the installation platform, and the height adjustment rod 12 is used to adjust the height position of the support 2 and the roller 3, thereby adjusting the support height of the entire device.

[0039] The height adjustment rod 12 can be a telescopic push rod or a threaded connection column. Preferably, the height adjustment rod 12 is a threaded connection column, and the threaded connection column is threadedly connected to the support 2. The thread on the threaded connection column can be an internal thread or an external thread. By setting the height adjustment rod 12 and the support 2 as a threaded connection structure, the device realizes fine adjustment and self-locking of the support height, improves the processing accuracy of the piston rod, is easy to operate, and is stable and reliable.

[0040] The base 11 can be a plate structure, a frame structure, a column structure or a frustum structure, etc. As a further preference, the base 11 is a cylindrical or frustum-shaped structure, and the side surface of the base 11 is provided with limiting holes 13. There are at least two limiting holes 13, and at least two of the limiting holes 13 are evenly distributed along the circumference of the base 11; the central axis of the limiting holes 13 is arranged along the radial direction of the base 11. Generally, 6 limiting holes 13 are provided. Tools such as pins can be inserted into the limiting holes 13 to temporarily limit the base 11 and then rotate the support 2 to complete the adjustment of the support height of the device, which is convenient for operation.

[0041] The base 11 can be directly slidably connected to the installation platform, or rollers or balls can be installed on the bottom surface of the base 11, and the base 11 is rollingly connected to the installation platform through the balls or rollers. As a further preference, the bottom surface of the base 11 is a smooth plane with a surface roughness Ra less than or equal to 3.2 μm. The structure is simple and the assembly process is saved. The bottom surface of the base 11 is smooth and is horizontally slidably connected to the installation platform, and can adaptively move in the horizontal direction with the piston rod 9 during thread rolling processing and automatically align with the piston rod 9.

[0042] As a further preference, an oil injection hole is provided above the base 11, and an oil outlet hole communicating with the oil injection hole is provided on the bottom surface of the base 11. Lubricating oil is injected into the base 11 through the oil injection hole, and the lubricating oil flows out from the oil outlet hole on the bottom surface of the base 11, providing a lubricant for the sliding contact surface between the base 11 and the installation platform, further reducing the frictional force between the contact surface of the base 11 and the installation platform, enabling the entire support device to slide adaptively horizontally more smoothly along with the swing of the piston rod 9, completing the automatic alignment movement with the piston rod 9 more timely, reducing the influence of the swing of the piston rod 9 on its machining accuracy to a greater extent, and further improving the thread machining accuracy of the piston rod 9.

[0043] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A compressor piston rod support device, characterized in that: It includes a height adjustment mechanism (1), a support (2) and rollers (3). The support (2) is installed on the height adjustment mechanism (1), and the height adjustment mechanism (1) is used to adjust the height position of the support (2). The roller (3) is rotatably installed on the support (2) through a rotating shaft (4). The side surface of the roller (3) protrudes upward from the top surface of the support (2), and the rotating shaft (4) is arranged in the horizontal direction. There are two rollers (3), and the two rollers (3) are arranged at intervals along the horizontal radial direction. The support (2) is provided with a U-shaped groove opening upward, and a rotating shaft mounting hole (21) is provided on the side wall of the U-shaped groove. The roller (3) and the rotating shaft (4) are coaxially arranged and both are located in the U-shaped groove. Both ends of the rotating shaft (4) are installed in the rotating shaft mounting hole (21), and the roller (3) is installed on the rotating shaft (4).

2. The compressor piston rod support device according to claim 1, wherein: A first positioning hole is provided on the side surface of the rotating shaft (4), and a second positioning hole is provided on the support (2). The axis of the second positioning hole is arranged in the up and down direction and is communicated with the rotating shaft mounting hole (21). A positioning pin (42) is provided in the second positioning hole, and the positioning pin (42) is inserted into the first positioning hole.

3. The compressor piston rod support device according to claim 1, characterized in that: An elastic anti-slip layer (31) is coated on the outer side surface of the roller (3).

4. The compressor piston rod support device according to claim 1, characterized in that: The roller (3) is a rolling bearing, and an elastic bearing sleeve is clamped on the outer side surface of the rolling bearing. An axial limiting sleeve (41) is sleeved on the rotating shaft (4) in the U-shaped groove. One end of the axial limiting sleeve (41) abuts against the side wall of the U-shaped groove, and the other end of the axial limiting sleeve (41) abuts against the end surface of the inner ring of the rolling bearing. There are two axial limiting sleeves (41), and the two axial limiting sleeves (41) are distributed at both ends of the rolling bearing.

5. The compressor piston rod support device according to any one of claims 1-4, characterized in that: The height adjustment mechanism (1) includes a base (11) and a height adjustment rod (12) provided on the base (11). The support (2) is installed on the upper part of the height adjustment rod (12).

6. The compressor piston rod support device according to claim 5, characterized in that: The height adjustment rod (12) is a threaded connection column, and the threaded connection column is threadedly connected with the support (2).

7. The compressor piston rod support device according to claim 6, characterized in that: The base (11) is of a cylindrical or frustum-shaped structure. A limiting hole (13) is provided on the side surface of the base (11). There are at least two limiting holes (13), and at least two limiting holes (13) are evenly distributed along the circumferential direction of the base (11). The central axis of the limiting hole (13) is arranged along the radial direction of the base (11).

8. The compressor piston rod support device according to claim 5, wherein: The bottom surface of the base (11) is a smooth plane with a surface roughness Ra less than or equal to 3.2 μm.

9. The compressor piston rod support device according to claim 6, characterized in that: An oil injection hole is provided above the base (11), and an oil outlet hole communicated with the oil injection hole is provided on the bottom surface of the base (11).

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