Screw host bearing clearance measuring device

Abstract

The utility model discloses a screw host bearing clearance measuring device, which belongs to the technical field of screw host assembly, and comprises a lever lifting structure and a displacement measuring mechanism, the lever lifting structure comprises a support rod and a lifting rod, one end of the lifting rod is provided with a lifting hook, the middle part of the lifting rod is provided with a sliding groove extending along the axis direction of the lifting rod, and the displacement measuring mechanism is arranged in the sliding groove. The supporting rod is perpendicular to the lifting rod and is installed in the sliding groove in a sliding mode. The supporting rod is perpendicular to the lifting rod and is slidably mounted on the lifting rod, and the mounting position of the supporting rod in the sliding groove can be adjusted in the height direction of the supporting rod and the axis direction of the lifting rod, so that the gap measuring device can adapt to gap measurement of various screw hosts, and the universality of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw main engine assembly, and more specifically, to a device for measuring the bearing clearance of a screw main engine. Background Art

[0002] In the field of screw compressors, the input shaft of a screw main engine is generally assembled on the gearbox of the screw main engine through a pair of tapered roller bearings. The tapered roller bearings bear large combined radial and axial loads, and the bearing clearance directly affects the running stability of the screw main engine. Therefore, it is necessary to adjust the running clearance of the bearings to ensure that the bearing running clearance in the screw main engine is in an ideal state. At present, the bearing clearance is generally adjusted by a common crowbar or a hydraulic lifting structure to adjust the height of the input shaft, and at the same time, a micrometer or a dial indicator is used to measure the lifting distance. However, when using a crowbar for adjustment, it often needs to be used in combination with other tools, and this operation method has no stable fixed fulcrum, so the operation is inconvenient. When using a hydraulic lifting structure to lift the screw main engine, each type of screw main engine requires a specific auxiliary tooling for cooperation, and at the same time, complex measurement preparation work is required during measurement, resulting in high tooling costs and reduced operation efficiency.

[0003] After retrieval, the application case with the Chinese patent application number 201210287127.7 discloses a detection tooling and a detection method for the bearing clearance of a pinion in a gearbox. A pinion bearing is arranged in the gearbox, a pinion shaft passes through the pinion bearing, and the end of the pinion shaft passes out of the gearbox. The detection tooling for the bearing clearance of the pinion in the gearbox includes a rotating sleeve and a lever mechanism; the rotating sleeve is used for sleeving and fixing on the end of the pinion shaft; the lever mechanism includes a lever body and a support body. The first end of the lever body is detachably connected to the rotating sleeve, the first end of the support body is rotatably connected between the first end and the second end of the lever body, and the second end of the support body is used for connecting to the gearbox, so that the lever body rotates under the action of the force applied to the second end of the lever body, and drives the rotating sleeve and the pinion shaft to move axially on the pinion shaft. This application case can realize bearing clearance detection, but its versatility still needs to be further improved. Summary of the Utility Model

[0004] Aiming at the technical problems of inconvenient measurement and low adaptability of the existing bearing clearance of the screw main engine, the utility model provides a device for measuring the bearing clearance of the screw main engine. By arranging the support rod perpendicular to the lifting rod and slidingly installing it on the lifting rod, the device can adapt to the measurement of the bearing clearance of various screw main engines, thereby improving the versatility of the device.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] A device for measuring the bearing clearance of a screw main engine of the utility model comprises a lever lifting structure and a displacement measuring mechanism. The lever lifting structure includes a support rod and a lifting rod. One end of the lifting rod is provided with a lifting hook. A sliding groove extending along the axis direction of the lifting rod is arranged on the lifting rod. The support rod is perpendicular to the lifting rod and is slidably installed in the sliding groove, and the support rod can be installed in the sliding groove in a liftable manner.

[0007] Further, the two opposite surfaces of the upper part of the support rod that are in sliding fit with the sliding groove are smooth surfaces. Locking threads are correspondingly machined on both sides of the two smooth surfaces. The support rod is locked in the sliding groove through a flange nut.

[0008] Further, the two smooth surfaces of the support rod and the inner wall of the sliding groove are in clearance fit, and the outer diameter of the locking thread on the upper part of the support rod is greater than the distance between the two smooth surfaces.

[0009] Further, a horizontal groove is machined on the surface of the lifting rod along the extension of the sliding groove, and the flange nut abuts against the horizontal groove.

[0010] Further, a support part is arranged at the bottom of the support rod. The contact surface of the support part with the housing of the screw main engine gearbox includes a horizontal support surface and an upwardly inclined slope surface.

[0011] Further, knurling is arranged at the other end of the lifting rod away from the lifting hook.

[0012] Further, a sleeve is threadedly connected to the other end of the lifting rod away from the lifting hook.

[0013] Further, an extended thread for connecting with the sleeve is machined on the lifting rod. The extended thread is located between the knurling and the sliding groove, and the outer diameter of the knurling is smaller than the inner thread diameter of the sleeve.

[0014] Further, one end of the lifting hook is threadedly connected to the lifting rod.

[0015] Further, the lifting hook is square.

[0016] Adopting the technical solution provided by the utility model, compared with the prior art, it has the following beneficial effects:

[0017] (1) By optimizing the design of the lever lifting structure, the utility model arranges the support rod perpendicular to the lifting rod and slidably installs it in the sliding groove. The support rod can be installed in the sliding groove in a liftable manner, realizing that the installation position of the support rod in the sliding groove can be adjusted along both the height direction of the support rod and the axis direction of the lifting rod. On the one hand, it is convenient to adjust the contact position between the support rod and the gearbox housing to adjust to a suitable fulcrum position. On the other hand, it can adapt to the input shafts with different extended heights in the gearbox, and thus can adapt to more models of screw main engines.

[0018] (2) The utility model optimizes the connection relationship between the lifting rod and the support rod. The two smooth surfaces on the upper part of the support rod are in clearance fit with the inside of the sliding groove, and the outer diameter of the thread on the upper part of the support rod is greater than the distance between the two smooth surfaces, thereby restricting the rotation of the support rod relative to the sliding groove, and further facilitating the stability of the lifting operation. At the same time, a horizontal groove is machined on the surface of the lifting rod along the extension of the sliding groove, which is beneficial to increasing the contact area of the lifting rod with the flange nut and further improving the locking stability of the support rod.

[0019] (3) The utility model optimizes the bottom of the support rod. The contact surface between the support part at the bottom of the support rod and the gearbox housing includes a horizontal support surface and an upwardly inclined ramp surface. During use, the ramp surface is located on the side away from the lifting hook. As the lifting process progresses, the contact surface between the support part and the gearbox housing gradually transitions from the horizontal support surface to the ramp surface, which can compensate for the displacement generated by the lifting rod, improve the stability of the continuous contact between the bottom of the support rod and the gearbox housing, and is more labor-saving during operation.

[0020] (4) The utility model further optimizes the lever lifting structure. The support rod is threadedly connected to the lifting rod, and the lifting rod is threadedly connected to the lifting hook. Thus, each component of the lever lifting structure is detachable, facilitating assembly and carrying. At the same time, the threaded connection between the lifting rod and the lifting hook facilitates the replacement of various types of lifting hooks, so as to adapt to different models of screw main engines. In addition, a sleeve for lengthening the operation handle is provided at the other end of the lifting rod and is threadedly connected thereto, making the operation process more labor-saving and convenient, and further expanding the adaptation range of the device. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the use state of the screw main engine bearing clearance measuring device according to an embodiment of the utility model.

[0022] Figure 2 is a schematic diagram of the structure of the lever lifting structure in an embodiment of the utility model.

[0023] Figure 3 is a schematic diagram of the structure of the lifting rod in an embodiment of the utility model.

[0024] Figure 4 is a schematic diagram of the structure of the support rod in an embodiment of the utility model.

[0025] Figure 5 is a schematic diagram of the structure of the screw main engine.

[0026] Figure 6 is Figure 1 a partial enlarged schematic diagram of part A in

[0027] Figure 7This is a schematic structural diagram of the displacement measurement mechanism in the embodiment of the present utility model.

[0028] Label description:

[0029] 1. Lever lifting structure; 101. Support rod; 1011. Slope surface; 1012. Locking thread; 102. Flange nut; 103. Lifting hook; 104. Lifting rod; 1041. Sliding groove; 1042. Extended thread; 1043. Knurling; 105. Sleeve;

[0030] 2. Displacement measurement mechanism; 201. Gauge block; 202. Micrometer;

[0031] 3. Screw main machine; 301. Eye bolt; 302. Input shaft; 303. Gland; 304. Tapered roller bearing; 305. Gear box. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here.

[0034] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] This embodiment provides a screw main machine bearing clearance measuring device, such as Figure 1 、Figure 2 As shown in the figure, it includes a lever lifting structure 1 and a displacement measuring mechanism 2. The lever lifting structure 1 includes a support rod 101 and a lifting rod 104. One end of the lifting rod 101 is provided with a lifting hook 103. A sliding groove 1041 extending along the axis direction is provided on the lifting rod 104. The support rod 101 is perpendicular to the lifting rod 104 and is slidably installed in the sliding groove 1041. The support rod 101 is vertically and slidably installed in the sliding groove 1041.

[0036] Through the optimized design of the lever lifting structure 1, the support rod 101 is perpendicular to the lifting rod 104 and is slidably installed in the sliding groove 1041, and the support rod 101 is vertically and slidably installed in the sliding groove 1041, realizing that the installation position of the support rod 101 in the sliding groove 1041 can be adjusted along the height direction of the support rod 101 and the axis direction of the lifting rod 104. On the one hand, it is convenient to adjust the contact position between the support rod 101 and the outer shell of the gearbox 305 to adjust to a suitable fulcrum position, improving the convenience and stability of operation; on the other hand, it can adapt to the input shafts 302 with different protruding heights in the gearbox 305, and thus can adapt to more models of screw main engines 3, improving the versatility of the device.

[0037] As Figure 5 shown, the input shaft 302 of the screw main engine 3 is generally provided with a lifting hole. The eyebolt 301 is installed in the lifting hole of the input shaft 302. The upper part of the lifting hook 103 is provided with a hook groove adaptively designed with the eyebolt 301. The lifting hook 103 cooperates with the eyebolt 301 to lift the input shaft 302, and drives the input shaft 302 in the screw main engine 3 to lift with the bottom of the support rod 101 as the fulcrum through the lifting hook 103.

[0038] As a preferred implementation manner of the support rod 101, as Figure 4 shown, the two opposite surfaces of the upper part of the support rod 101 that are slidably matched with the sliding groove 1041 are smooth surfaces. Thus, the installation position of the support rod 101 in the sliding groove 1041 can be adjusted along the axis direction of the lifting rod 104, and it can also move vertically in the sliding groove 1041 along its own axis direction. Further preferably, locking threads 1012 are correspondingly machined on both sides of the two smooth surfaces. The flange nut 104 is threadedly connected to the locking threads 1012 to lock the support rod 101 in the sliding groove 1041. This locking method is convenient for disassembly and assembly, is beneficial to adjusting the installation position of the support rod 101 relative to the lifting rod 104, and thus can adapt to more models of screw main engines.

[0039] Specifically, there is a clearance fit between the two smooth surfaces of the support rod 101 and the inner wall of the sliding groove 1041. The outer diameter of the locking thread 1012 on the upper part of the support rod 101 is greater than the distance between the two smooth surfaces. Thus, the support rod 101 can only move within the sliding groove 1041, restricting the rotation of the support rod 101 relative to the sliding groove 1041, which is beneficial to the stability of the lifting operation.

[0040] More preferably, a horizontal groove is machined on the surface of the lifting rod 104 along the extension of the sliding groove 1041, and the flange nut 104 abuts against the horizontal groove to increase the contact area between the flange nut 104 and the lifting rod 104, thereby improving the locking stability of the flange nut 104. Further preferably, two horizontally symmetric grooves are machined on the surface of the lifting rod 104 along the extension of the sliding groove 1041, and the two flange nuts 104 respectively abut against the two horizontal grooves.

[0041] In some embodiments, as Figure 6 shown, a support portion is provided at the bottom of the support rod 101. The contact surface between the support portion and the housing of the gearbox 305 includes a horizontal support surface and an upwardly inclined ramp surface 1011. During use, the ramp surface 1011 is located on the side away from the lifting hook 103. As the lifting process progresses, the contact surface between the support portion and the housing of the gearbox 305 gradually transitions from the horizontal support surface to the ramp surface 1011, which can compensate for the displacement generated by the lifting rod 104, improve the stability of the continuous contact between the bottom of the support rod 101 and 1011, and make the operation more labor-saving.

[0042] To improve the stability of the operation, preferably, as Figure 3 shown, knurling 1043 is provided at the other end of the lifting rod 104 away from the lifting hook 103. More preferably, a sleeve 105 for extending the operating handle is threadedly connected to the other end of the lifting rod 104 away from the lifting hook 103, making the operation more labor-saving and convenient, and further expanding the adaptation range of the device.

[0043] Specifically, an extension thread 1042 for connecting with the sleeve 105 is machined on the lifting rod 104. The extension thread 1042 is located between the knurling 1043 and the sliding groove 1041, and the outer diameter of the knurling 1043 is smaller than the inner thread diameter of the sleeve 105.

[0044] As a further preferred embodiment of the present invention, one end of the lifting hook 103 is threadedly connected to the lifting rod 104, facilitating the replacement of various types of lifting hooks 103, so as to adapt to different models of screw hosts, and further expanding the adaptation range of the device. More preferably, the lifting hook 103 is square, which facilitates its installation or disassembly.

[0045] During the assembly process of the screw main engine, the bearing clearance needs to be measured. Only after the measured value meets the standard can the next process be carried out. For example, Figure 7 As shown, the displacement measuring mechanism 2 includes a gauge block 201 and a micrometer 202. The micrometer 202 is installed on the gauge block 201. During measurement, the probe of the micrometer 202 contacts the axial end face of the input shaft 302.

[0046] The usage state of the bearing clearance measuring device for the screw main engine is as shown in Figure 1 As shown. Before the measurement starts, rotate the input shaft 1 and tap the end face of the input shaft 1 to make it at the lowest point of downward movement. The following measurement steps are included:

[0047] (1) Fix the gauge block 201 on the housing of the gearbox 304, and make the probe of the micrometer 202 contact the axial end face of the input shaft 302;

[0048] (2) Adjust the position of the lifting rod 104 relative to the support rod 102 to adapt to the height of the eyebolt 301 and achieve a suitable fulcrum position at the bottom of the support rod 102 on the housing of the gearbox 305;

[0049] (3) The hook groove of the lifting hook 103 is engaged with the ring of the eyebolt 301; Apply a force to one end of the lifting hook 103 away from the lifting rod 104 to drive the input shaft 302 to move upward. During the upward movement of the input shaft 302, it will be limited by the gland 303. When the input shaft 302 is limited, it reaches the highest point of upward movement. Observe the reading on the micrometer to obtain the bearing clearance H.

[0050] In the above measurement steps, a dial indicator can also be used instead of the micrometer.

[0051] The specific process of step 2 is as follows: Adjust the height position of the lifting rod 104 relative to the support rod 102. The flange nut 102 confines the support rod 102 in the lifting rod 104. At this time, the flange nut 102 is not fully tightened, and the support rod 102 can slide in it along the extension direction of the sliding groove 1041 to adjust the horizontal position of the support rod 102 in the sliding groove 1041, so as to find a suitable fulcrum position on the housing of the gearbox 305. The fulcrum position is generally a flat place on the housing of the gearbox 305. After the fulcrum position is determined, the flange nut 104 fully locks the support rod 102 on the lifting rod 104. In step 2, the fulcrum position at the bottom of the support rod 102 can also be adjusted first, and then the height position of the lifting rod 104 relative to the support rod 102 can be adjusted.

[0052] Such as Figure 5As shown in the figure, the principle of bearing clearance adjustment is as follows: During operation, there is a bearing operating clearance in the screw main unit 3. Due to the existence of the bearing operating clearance, the tapered roller bearing 304 can move along with the axial movement of the input shaft 302. When the tapered roller bearing 304 moves to the point where its outer ring contacts the axial end face of the gland 303, it is limited by the gland 303 and cannot continue to move in this direction. At the same time, the input shaft 302 is forced to stop axial movement due to the limitation of the tapered roller bearing 304. During design, there is a bearing clearance H left between the axial end face of the gland 303 and the axial end face of the outer ring of the tapered roller bearing 304 in the screw main unit 3, and this clearance is greater than the bearing operating clearance. By placing a gasket with a corresponding thickness between the gland 303 and the tapered roller bearing 304 according to the measured bearing clearance H, the required bearing operating clearance can be adjusted. The bearing operating clearance is the difference between the bearing clearance H and the thickness of the gasket placed. After placing the gasket, repeat the above steps to measure and verify the bearing operating clearance.

[0053] In some embodiments, the support rod 101 is threadedly connected to the lifting rod 104, the lifting rod 104 is threadedly connected to the lifting hook 103, and the lifting rod 104 is threadedly connected to the sleeve 105. Thus, each component of the lever lifting structure 1 is detachable, improving the versatility of the device and facilitating assembly and carrying. In addition, the user-friendly design of this device is simple and labor-saving to use, and no complex preparation work is required before measuring the bearing clearance, greatly improving work efficiency.

[0054] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design structurally similar ways and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A measuring device for the bearing clearance of a screw main engine, comprising a lever lifting structure (1) and a displacement measuring mechanism (2). The lever lifting structure (1) includes a support rod (101) and a lifting rod (104). One end of the lifting rod (104) is provided with a lifting hook (103), and it is characterized in that, The lifting rod (104) is provided with a sliding groove (1041) extending along its axis. The support rod (101) is arranged perpendicular to the lifting rod (104) and is slidably installed in the sliding groove (1041) in the horizontal direction, and the support rod (101) can be installed in the sliding groove (1041) in a liftable manner.

2. The screw main engine bearing clearance measuring device according to claim 1, characterized in that, The two opposite surfaces of the upper part of the support rod (101) that are in sliding fit with the sliding groove (1041) are smooth surfaces, and locking threads (1012) are correspondingly machined on both sides of the two smooth surfaces. The support rod (101) is locked in the sliding groove (1041) by a flange nut (102).

3. The screw main engine bearing clearance measuring device according to claim 2, characterized in that, The two smooth surfaces of the support rod (101) and the inner wall of the sliding groove (1041) are in clearance fit, and the outer diameter of the locking thread (1012) on the upper part of the support rod (101) is greater than the distance between the two smooth surfaces.

4. The screw main engine bearing clearance measuring device according to claim 2, wherein A horizontal groove is machined on the surface of the lifting rod (104) along the extension of the sliding groove (1041), and the flange nut (102) abuts against the horizontal groove.

5. The screw main engine bearing clearance measuring device according to any one of claims 1-4, characterized in that, The bottom of the support rod (101) is provided with a support part, and the contact surface of the support part with the outer shell of the screw main engine gearbox (305) includes a horizontal support surface and an upwardly inclined ramp surface (1011).

6. The screw main engine bearing clearance measuring device according to claim 5, characterized in that The other end of the lifting rod (104) away from the lifting hook (103) is provided with knurling (1043).

7. The screw main engine bearing clearance measuring device according to claim 6, characterized in that, A sleeve (105) is threadedly connected to the other end of the lifting rod (104) away from the lifting hook (103).

8. The screw main engine bearing clearance measuring device according to claim 7, characterized in that The lifting rod (104) is machined with an extended thread (1042) for connecting with the sleeve (105). The extended thread (1042) is located between the knurling (1043) and the sliding groove (1041), and the outer diameter of the knurling (1043) is smaller than the inner thread diameter of the sleeve (105).

9. The screw main engine bearing clearance measuring device according to any one of claims 1-4, characterized in that, One end of the lifting hook (103) is threadedly connected to the lifting rod (104).

10. The screw main engine bearing clearance measuring device according to claim 9, characterized in that, The lifting hook (103) is square.

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