Reciprocating compressor coaxiality detection method and alignment tool

Abstract

The invention belongs to the technical field of compressor installation, and particularly provides a reciprocating compressor coaxiality detection method and an alignment tool. The objective of the invention is to solve the problems of low detection efficiency and low detection precision of an existing compressor coaxiality detection method. A method for detecting the coaxiality of a reciprocating compressor comprises the steps that an emission target assembly is placed in a compressor body, and a switch of an emission target is turned on; placing an alignment tool in a slide way of the compressor so as to align the light emitted by the emission target; a receiving target assembly is installed in the slide way, and a detected reference site is determined; and the receiving target assembly is installed in an air cylinder of the compressor, and the concentricity deviation value of the sliding way and the air cylinder is determined according to the reference site. The detection method provided by the invention can be used for measuring the concentricity of the cylinder-slideway of the horizontal reciprocating compressor of different types of products, and the precision of initial alignment, the overall detection efficiency and the accuracy of the detection result are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor installation, and specifically provides a coaxiality detection method and an alignment tool for a reciprocating compressor. Background Art

[0002] During the installation and commissioning of reciprocating compressors, the coaxiality (radial displacement and axial tilt) of the center line of the fuselage slide and the center line of the cylinder should be checked according to the requirements of API618. The traditional "wire pulling alignment method" (commonly known as wire pulling) is difficult to operate, with poor measurement accuracy and repeatability of measurement results. The measurement error caused by human factors is difficult to estimate, and it is time-consuming and labor-intensive, and is not suitable for large-scale production inspection operations.

[0003] Currently, the laser alignment instrument inspection method is more commonly used, which effectively improves the efficiency and accuracy of detection. However, the laser alignment instrument method still has the following problems: the laser alignment instrument's emission target is placed on the surface of the workpiece being measured, which affects its detection accuracy; at the same time, the laser alignment instrument's initial alignment process (when determining the reference) is time-consuming and labor-intensive, and cannot guarantee the accuracy of the detection results well, and the reference is often determined repeatedly.

[0004] Therefore, there is an urgent need for a detection method that can improve the detection accuracy and efficiency of the coaxiality in the compressor to solve the above problems. Summary of the invention

[0005] An object of the present invention is to provide a detection method capable of improving the detection accuracy and efficiency of coaxiality in a compressor.

[0006] To achieve the above object, the present invention provides a method for detecting the coaxiality of a reciprocating compressor, comprising:

[0007] Place the launch target assembly into the compressor body and turn on the launch target switch;

[0008] Placing an alignment tool in the slideway of the compressor to align the light emitted by the emission target;

[0009] Installing a receiving target assembly in the slideway to determine a reference position for detection;

[0010] The receiving target assembly is installed in the cylinder of the compressor, and the concentricity deviation value of the slideway and the cylinder is determined according to the reference position.

[0011] Further, the launch target assembly includes the launch target and a launch target bracket; the launch target bracket includes a first bracket platform and a bracket leg, one end of the bracket leg is connected to the first bracket platform; an adjustment knob is provided on the bracket leg; the step of placing the launch target assembly into the compressor body includes: installing the launch target bracket in the compressor body; then installing the launch target on the first bracket platform, and adjusting the adjustment knob so that the bottom of the bracket leg abuts against the inner wall of the slide.

[0012] Furthermore, the alignment tool includes a center disk having a center hole at the center of the center disk; the step of placing the alignment tool in the slide to align the light emitted by the launch target includes: selecting at least two alignment positions on the slide, and placing one alignment tool at at least two of the alignment positions; adjusting the height of the launch target bracket so that the laser beam emitted by the launch target can hit the center disk of the alignment tool close to the launch target; rotating the launch target until the laser beam passes through the center hole of each alignment tool; and tightening the screws at the bottom of the bracket leg to fix the launch target bracket to the compressor body.

[0013] Furthermore, the alignment tool includes three support rods connected to the center disk, and the ends of the three support rods form a circle with the same diameter as the inner wall of the slide; and the step of placing one of the alignment tools at at least two of the alignment positions includes: placing each of the alignment tools at the alignment position corresponding to it, and pressing one of the support rods of each alignment tool against the top surface of the inner wall of the slide, and the two support rods at the bottom of each alignment tool respectively abut against a position on the inner wall of the slide away from its edge.

[0014] Further, the receiving target assembly includes a receiving target and a receiving target bracket, the receiving target is rotatably connected to the receiving target bracket, and the receiving target includes a receiving target body and a positioning support rod; the step of installing the receiving target assembly into the slideway of the compressor and determining the reference position for detection includes: selecting at least two measuring positions in the slideway; installing a receiving target and a receiving target bracket at one of the measuring positions, and adjusting the lens height of the receiving target to the inner radius of the slideway, inputting the horizontal distance from a measuring position in the slideway to the transmitting target in the host, and rotating the receiving target so that The positioning support rod is able to abut against different positions of the inner wall of the slide, the host is controlled to obtain the coordinates of at least five different positions of the positioning support rod on the inner wall of the slide, and then the receiving target and the receiving target bracket are installed at the next measuring point in the slide, and the horizontal distance from the measuring point to the transmitting target and the coordinates of at least five different positions of the positioning support rod on the inner wall of the slide are detected until the measuring point detection is completed; and then the host is controlled to calculate the concentricity deviation values ​​between different measuring points and record the calculation results to determine the final center coordinates of the slide, and use it as the reference point.

[0015] Furthermore, the step of installing the receiving target assembly in the cylinder and determining the concentricity deviation value of the slideway and the cylinder according to the reference position includes: selecting at least two measuring positions in the cylinder; installing a receiving target and a launching target bracket at one of the measuring positions, and adjusting the center height of the receiving target lens to the inner radius of the cylinder body; inputting the horizontal distance between one of the measuring positions in the cylinder and the launching target in the host, and rotating the receiving target so that the measuring support rod can abut against different positions of the inner wall of the cylinder, and controlling the host to obtain the horizontal distance between the measuring support rod in the cylinder. The host computer controls the coordinates of at least five different positions on the inner wall of the cylinder, then installs a receiving target and a receiving target bracket for the next measuring point in the cylinder, and detects the distance between the measuring point and the launching target and the coordinates of at least five different positions of the measuring support rod on the inner wall of the cylinder until all measuring points are detected; controls the host computer to calculate the concentricity deviation value of the cylinder and records the calculation result; controls the host computer to calculate and record the concentricity deviation value of the slideway and the cylinder according to the obtained reference point of the slideway, the concentricity deviation value of the cylinder and the horizontal distance from each measuring point in the cylinder to the launching target.

[0016] Further, the step of installing the receiving target assembly in the cylinder and determining the concentricity deviation value of the slideway and the cylinder according to the reference position comprises: selecting at least two measuring positions in the cylinder; installing a receiving target and a launching target bracket at each measuring position, and adjusting the center height of the receiving target lens to the inner radius of the cylinder body; inputting the horizontal distance between each measuring position in the cylinder and the launching target in the host in sequence, and rotating the receiving target so that the positioning support rod can abut against different positions of the inner wall of the cylinder, controlling the host to obtain the coordinates of at least five different positions of the positioning support rod on the inner wall of the cylinder, and then controlling the host to calculate the concentricity deviation value of the cylinder, and recording the calculation result; according to the obtained reference position of the slideway, the concentricity deviation value of the cylinder and the horizontal distance from each measuring position in the cylinder to the launching target, controlling the host to calculate and record the concentricity deviation value of the slideway and the cylinder.

[0017] Furthermore, the step of sequentially inputting the horizontal distance between each of the measuring points in the cylinder and the launch target in the host comprises: using a ruler to measure the horizontal distance between each of the measuring points in the cylinder and the launch target, and sequentially inputting the measured distances into the host.

[0018] In other embodiments, an alignment tool is provided, which can be applied to the reciprocating compressor coaxiality detection method described in any one of the above to align the compressor.

[0019] Furthermore, the alignment tool includes a center disk and three support rods connected to the center disk, the center of the center disk has a center hole, and the center hole is used for allowing light emitted by the target to pass through; the ends of the three support rods form a circle, and the three support rods are respectively abutted at different positions of the inner wall of the slide.

[0020] Furthermore, the diameter of the central hole is 2.5 mm.

[0021] Based on the foregoing description, those skilled in the art can understand that, in the aforementioned technical scheme of the present invention, the detection method of the present invention can be used for measuring the concentricity of the cylinder-slideway of horizontal reciprocating compressors of different models; the launch target is set in the fuselage to avoid the existing problem of placing the launch target on the surface of the workpiece to be measured, resulting in poor detection accuracy; at the same time, an alignment tool is used for alignment, and a special centering and alignment device that "converts the virtual axis into the real axis" is used. After fine-tuning the alignment center tool, the center lines of the cylinder and the slideway are "visualized", and then the concentricity laser measurement system is used to measure the concentricity of the cylinder and the slideway, thereby effectively improving the accuracy of the alignment and the accuracy of the overall detection results, and effectively avoiding the existing initial alignment using a laser alignment instrument, the problem that it is difficult to determine the reference, time-consuming and labor-intensive, and the accuracy is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the same reference numerals indicate the same or similar components or parts in different drawings; the drawings of the present invention are not necessarily drawn to scale.

[0023] In the attached figure:

[0024] Figure 1 is a schematic diagram of the structure of a compressor in some embodiments of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of each measuring point in some embodiments of the present invention;

[0026] Figure 3 yes Figure 2 Schematic diagram of the coaxial detection process;

[0027] Figure 4 is a structural schematic diagram of the launch target alignment process in other embodiments of the present invention;

[0028] Figure 5 yes Figure 2 Schematic diagram of the structure of the medium launch target;

[0029] Figure 6 yes Figure 2 Schematic diagram of the structure of the medium launch target bracket;

[0030] Figure 7 yes Figure 4 Schematic diagram of the structure of the alignment tool;

[0031] Figure 8 yes Figure 2 Schematic diagram of the structure of the receiving target assembly.

[0032] Description of reference numerals:

[0033] 1. compressor; 11. fuselage; 12. slideway; 121. first measuring point; 122. second measuring point; 13. cylinder; 131. third measuring point; 132. fourth measuring point; M. virtual beam;

[0034] 21. Launch target; 211. Launch target body; 212. Counterweight; 213. Balance bar; 22. Launch target bracket; 221. First bracket platform; 222. Bracket leg; 223. Adjustment knob; 224. First level; 225. Support member;

[0035] 3. Alignment tool; 31. Center disk; 32. Center hole; 33. Support rod;

[0036] 41. receiving target; 411. receiving target body; 412. positioning support rod; 413. sliding block; 42. receiving target bracket; 421. second bracket platform; 422. supporting frame. DETAILED DESCRIPTION

[0037] It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, rather than all embodiments of the present invention, and these embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

[0038] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Refer to the following Figures 1 to 8, to explain in detail the compressor coaxiality detection tool and principle in some embodiments of the present invention. Among them, Figure 1 is a schematic diagram of the structure of a compressor in some embodiments of the present invention;

[0041] Figure 2 is a schematic diagram of the structure of each measuring point in some embodiments of the present invention; Figure 3 yes Figure 2 Schematic diagram of the coaxial detection process; Figure 4 is a structural schematic diagram of the launch target alignment process in other embodiments of the present invention;

[0042] Figure 5 yes Figure 2 Schematic diagram of the structure of the medium launch target; Figure 6 yes Figure 2 Schematic diagram of the structure of the medium launch target bracket; Figure 7 yes Figure 4 Schematic diagram of the structure of the alignment tool; Figure 8 yes Figure 2 Schematic diagram of the structure of the receiving target assembly.

[0043] It should be noted that, for the convenience of description and to enable those skilled in the art to quickly understand the technical solution of the present invention, the following text only describes the technical features that are strongly related (directly or indirectly related) to the technical problem and / or technical concept to be solved by the present invention, and will not describe the technical features that are weakly related to the technical problem and / or technical concept to be solved by the invention. Since the technical features with a weaker degree of correlation belong to the common knowledge in the field, even if the present invention does not describe the features with a weaker degree of correlation, it will not lead to insufficient disclosure of the present invention.

[0044] Reference Figures 1 to 4 In some embodiments of the present invention, a method for detecting the coaxiality of a reciprocating compressor 1 is provided, comprising:

[0045] Step S110 , placing the launch target assembly into the compressor 1 body 11 , and turning on the launch target 21 .

[0046] The launch target assembly comprises a launch target 21 and a launch target bracket 22 . The launch target bracket 22 is first installed in the compressor 1 ; and then the launch target 21 is installed on the launch target bracket 22 .

[0047] like Figure 5As shown, the launch target 21 includes a launch target body 211, a counterweight 212 and a balance bar 213. The launch target body 211 is used to launch a virtual light beam M. The counterweight 212 provides weight so that the launch target 21 can maintain a balanced state. The balance bar 213 is used to connect the launch target body 211 and the counterweight 212. In order to maintain the overall balance of the first support platform 221, the number of balance bars 213 can be set to multiple. The balance bar 213 can be set as a telescopic rod to adjust the height of the launch target body 211, so as to facilitate adaptation to compressors of different models.

[0048] like Figure 6 As shown, the launch target support 22 includes a first support platform 221, a plurality of support legs 222, an adjustment knob 223 and a level gauge, and one end of the plurality of support legs 222 is connected to the first support platform 221. An adjustment knob 223 is provided on each support leg 222, and by adjusting the adjustment knob 223, the bottom of each support leg 222 is abutted against the inner wall of the bottom wall of the fuselage 11, so as to fix the launch target support 22 to the fuselage 11. A first level gauge 224 is provided on the first support platform 221, so that the operator can judge whether the first support platform 221 is in a balanced state.

[0049] In other embodiments of the present invention, the launch target support 22 further includes a support member 225, a plurality of support legs 222 are connected to one end of the support member 225, and the other end of the support member 225 is connected to the first support platform 221. Optionally, the first support platform 221 is rotatably connected to the support member 225.

[0050] Specifically, step S110 includes: installing the launch target bracket 22 in the compressor 1; then installing the launch target 21 on the first bracket platform 221, and adjusting the adjustment knob 223 so that the bottom of the bracket leg 222 abuts against the inner wall of the slide 12.

[0051] Step S120 , placing the alignment tool 3 in the slideway 12 of the compressor 1 to align the light emitted by the emission target 21 .

[0052] like Figure 7 As shown, the alignment tool 3 includes a central disk 31, and the center of the central disk 31 has a central hole 32. Step S120 "placing the alignment tool 3 in the slideway 12 to align the light emitted by the emission target 21" includes:

[0053] Step S121, select at least two alignment points on the slide 12, and place an alignment tool 3 at at least two alignment points. In order to improve the accuracy of alignment, the operator can install the alignment tools 3 at different positions of the slide 12, that is, multiple alignment points can be set in the slide 12, and the distance between two adjacent alignment points can be the same or different. In the present invention, in order to improve the detection efficiency, it is preferred to set two alignment points, that is, set an alignment point at each end of the slide 12, that is, place an alignment tool 3 at the end and tail of the slide 12, and when the laser of the launch target 21 passes through the center holes 32 of the two alignment tools 3 in turn, the position alignment of the launch target 21 is completed.

[0054] Step S122, adjust the height of the launch target bracket 22 so that the laser beam emitted by the launch target 21 can hit the central disk 31 of the alignment tool 3 close to the launch target 21. Specifically, adjust the knob on the launch target bracket 22 so that the light emitted by the launch target 21 can hit the central disk 31 of the alignment tool 3.

[0055] The adjustable height range of the launch target support 22 in the present invention is 550 mm to 980 mm, and is applicable to compressors 1 of all models.

[0056] Step S123, rotating the emission target 21 until the laser beam passes through the center hole 32 of each alignment tool 3. Figure 4 The virtual light beam M is shown. The emission target 21 is rotatably connected to the first support platform 221 . The emission target 21 is rotated to adjust the angle and height of the light emitted by the emission target 21 .

[0057] Step S124, screw the screws at the bottom of the bracket leg 222 to fix the launch target bracket 22 to the compressor 1 body 11. When it is determined that the light of the launch target 21 can pass through the center hole 32 of the alignment tool 3, the connection position of the launch target bracket 22 and the slideway 12 of the compressor 1 is fixed by adjusting the screws used for fixing on the launch target bracket 22.

[0058] The alignment tool 3 also includes three support rods 33 connected to the central disc 31, and the ends of the three support rods 33 form a circle with the same diameter as the inner wall of the slideway 12. The step of "placing an alignment tool 3 at at least two alignment positions" in step S122 includes:

[0059] Place each alignment tool 3 at the corresponding alignment position, and press one support rod 33 of each alignment tool 3 against the top surface of the inner wall of the slide 12, and the two support rods 33 at the bottom of each alignment tool 3 respectively abut against the inner wall of the slide 12 away from its edge.

[0060] In the present invention, the diameter of the centering hole 32 is set to 2.5 cm.

[0061] It should be noted that since the inner wall of the compressor 1 slide 12 is not a continuous structure but an intermittent slide 12 structure, when installing the alignment tool 3 and receiving the target assembly, the support foot of the support rod 33 of the alignment tool 3 can be kept away from the edge position of the inner wall of the slide 12 to avoid compression and deformation of the edge of the slide 12.

[0062] Step S130, installing a receiving target assembly in the slideway 12 to determine a reference position for detection.

[0063] like Figure 8 As shown, the receiving target assembly includes a receiving target 41 and a receiving target bracket 42 , and the receiving target 41 is rotatably connected to the receiving target bracket 42 .

[0064] The receiving target 41 includes a receiving target body 411, a positioning support rod 412 and a slider 413. The receiving target body 411 can receive the light beam emitted by the transmitting target 21, and the positioning support rod 412 can abut against the inner wall of the slideway 12. The receiving target 41 is configured to rotate the receiving target body 411, and the positioning support rod 412 can abut against different positions of the inner wall of the slideway 12.

[0065] The receiving target bracket 42 includes a second bracket platform 421, a support frame 422 and a second level (not shown in the figure), the second bracket platform 421 is used to connect with the surface of the workpiece to be tested (i.e., the slideway 12 and the cylinder 13), the support frame 422 is arranged on the second bracket platform 421, and the second level is arranged on the second bracket platform 421, so that the operator can judge whether the second bracket platform 421 on the receiving target 41 is in a balanced state, which is conducive to improving the accuracy of the coaxiality detection result of the compressor 1. One end of the slider 413 is slidably connected to the support frame 422, and the other end of the slider 413 is rotatably connected to the receiving target 41, and the slider 413 is slidably connected to the support frame 422, so that the operator can adjust the height of the receiving target 41.

[0066] In order to prevent the receiving target bracket 42 from shaking and affecting the detection results during the detection process, an anti-skid layer is provided on the bottom surface and around the bottom surface of the second bracket platform 421 to increase friction. Preferably, the anti-skid layer can be provided with a rubber material to prevent other materials from scratching the surface of the slideway 12, and the surface of the anti-skid layer is dotted or corrugated.

[0067] The host is electrically connected to the transmitting target 21 and the receiving target 41 , that is, the host can obtain the coordinate information of the transmitting target 21 and the receiving target 41 , and the host can calculate the center of the circle between different measuring points according to the obtained information.

[0068] The step of "installing the receiving target 41 and the receiving target bracket 42 into the slideway 12 of the compressor 1 to determine the reference position for detection" in step S130 includes:

[0069] Step S131, at least two measuring points are selected in the slide 12. Those skilled in the art can select the number of measuring points in the slide 12. Specifically, when there are two measuring points, the distance between the two measuring points can be set to the maximum distance between the head and the tail of the slide 12, that is, the two measuring points are the first measuring point 121 and the second measuring point 122, the first measuring point 121 is located at the end of the slide 12, and the second measuring point 122 is located at the tail of the slide 12. When there are more than two measuring points, the distance between two adjacent measuring points can be the same or different. In order to improve the accuracy of the detection result, two measuring points must be set at the head and the tail of the slide 12 among all the measuring points.

[0070] To further improve the accuracy of the detection result, the distance between the emission target 21 and the first measuring point 121 is set to be no less than 300 mm. That is, the distance between the emission target 21 and the measuring point close to the emission target 21 is set to be no less than 300 mm.

[0071] In order to meet the detection requirements of compressors 1 of different models, the number and setting positions of the alignment points and the measurement points can be set to be the same or different.

[0072] Step S132: install a receiving target 41 and a receiving target bracket 42 at a measuring point, adjust the lens height of the receiving target 41 to the inner radius of the slide 12, input the horizontal distance from a measuring point in the slide to the transmitting target 21 in the host, and rotate the receiving target 41 so that the positioning support rod 412 can abut against different positions of the inner wall of the slide 12, control the host to obtain the coordinates of at least five different positions of the positioning support rod 412 on the inner wall of the slide 12, then install the receiving target 41 and the receiving target bracket 42 at the next measuring point in the slide 12, and detect the horizontal distance from the measuring point to the transmitting target 21 and the coordinates of at least five different positions of the positioning support rod 412 on the inner wall of the slide, until the measuring point detection is completed.

[0073] The steps of installing the receiving target 41 and the receiving target bracket 42 in the slideway include: first obtaining the inner diameter of the slideway 12, which can be directly obtained from the nameplate or measured by the operator using a ruler. Then, the receiving target bracket 42 is placed in the slideway, and the second bracket platform 421 of the receiving target bracket 42 is judged to be in a horizontal state by observing the second level. When the second bracket platform 421 is in a horizontal state, the slider 413 is slid to adjust the height of the receiving target 41 so that the height of the lens center of the receiving target 41 is equal to the inner radius of the slideway.

[0074] The step of "inputting the horizontal distance from a measuring point in the slide 12 to the transmitting target 21 in the host" in step S132 includes: using a ruler to measure the horizontal distance between the receiving target 41 and the transmitting target 21 at each of the measuring points in the slide 12, and then inputting the measured distances into the host in sequence.

[0075] Step S133, the host is controlled to calculate the concentricity deviation values ​​between different measuring points and record the calculation results to determine the final center coordinates of the slideway 12 and use it as the reference point.

[0076] Step S140, installing the receiving target assembly in the cylinder 13 of the compressor 1, and determining the concentricity deviation value of the slideway 12 and the cylinder 13 according to the reference position. The step of "installing the receiving target assembly in the cylinder 13 of the compressor 1, and determining the concentricity deviation value of the slideway 12 and the cylinder 13 according to the reference position" in step S140 includes:

[0077] Step S141, at least two measuring points are selected in the cylinder 13. Those skilled in the art can set the number of measuring points in the cylinder 13 as needed. Specifically, when the number of measuring points is set to two, the distance between the two measuring points can be set to the maximum distance between the head and the tail of the cylinder 13, that is, the two measuring points are respectively set at the end and the tail of the cylinder 13. When the number of measuring points is set to more than two, the distance between two adjacent measuring points can be the same or different. In order to improve the accuracy of the detection result, two of all the measuring points must be set at the head and the tail of the cylinder 13. Preferably, the present invention sets the number of measuring points in the cylinder 13 to two, and the two measuring points are used as the third measuring point 131 and the fourth measuring point 132. The third measuring point 131 is located at the end of the cylinder 13, and the fourth measuring point 132 is located at the tail of the cylinder 13.

[0078] Step S142, a receiving target 41 and a transmitting target bracket 22 are installed at a measuring point, and the center height of the lens of the receiving target 41 is adjusted to the inner radius of the cylinder 13, the horizontal distance between a measuring point in the cylinder 13 and the transmitting target 21 is input into the host, and the receiving target 41 is rotated so that the positioning support rod 412 can abut against different positions of the inner wall of the cylinder 13, the host is controlled to obtain the coordinates of at least five different positions of the positioning support rod 412 on the inner wall of the cylinder 13, and then the receiving target 41 and the receiving target bracket 42 are installed at the next measuring point in the cylinder 13, and the distance between the measuring point and the transmitting target 21 and the coordinates of at least five different positions of the positioning support rod 412 on the inner wall of the cylinder 13 are detected, until all measuring points are detected.

[0079] Specifically, the steps of installing the receiving target 41 and the receiving target bracket 42 in the cylinder 13 include: first obtaining the inner diameter of the cylinder 13, which can be directly obtained from the nameplate or measured by the operator using a ruler. Then, the receiving target bracket 42 is placed in the cylinder 13, and the state of the second level is observed. When the second level is in a horizontal state, the slider 413 is slid to adjust the height of the receiving target bracket 42 so that the height of the lens center of the receiving target 41 is equal to the inner radius of the cylinder 13.

[0080] The step of "inputting the horizontal distance between a measuring point in the cylinder 13 and the launch target 21 in the host" in step S142 includes:

[0081] A ruler is used to measure the horizontal distance between the receiving target 41 and the transmitting target 21 at each measuring point in the cylinder 13, and the measured distances are input into the main machine in sequence.

[0082] Step S143, the control host calculates the concentricity deviation value of the cylinder 13 and records the calculation result.

[0083] Step S144 , the control host calculates and records the concentricity deviation value of the slideway 12 and the cylinder 13 according to the obtained reference point of the slideway 12 , the concentricity deviation value of the cylinder 13 , and the horizontal distance from each measuring point in the cylinder 13 to the launch target 21 .

[0084] In other embodiments of the present invention, an alignment tool 3 is provided. The alignment tool 3 can be used in any of the above-mentioned coaxiality detection methods for the reciprocating compressor 1 to perform alignment operations for the launch target 21 of the compressor 1 .

[0085] The alignment tool 3 includes a center disk 31 and three support rods 33 connected to the center disk 31. The center of the center disk 31 has a center hole 32, and the center hole 32 is used for allowing the light emitted by the target 21 to pass through; the ends of the three support rods 33 form a circle, and the three support rods 33 are respectively abutted at different positions on the inner wall of the slide 12.

[0086] The diameter of the center hole 32 is 2.5 mm.

[0087] Those skilled in the art can understand that the detection method of the present invention can be used for measuring the concentricity of the cylinder 13-slide 12 of horizontal reciprocating compressors 1 of different models; the launch target 21 is set in the fuselage 11 to avoid the existing problem of placing the launch target 21 on the surface of the workpiece to be measured, resulting in poor detection accuracy; at the same time, the alignment tool 3 is used for alignment, and a special centering and alignment device that "converts the virtual axis into the real axis" is used. After fine-tuning the alignment center tool, the center lines of the cylinder 13 and the slide 12 are "visualized", and then the concentricity laser measurement system is used to measure the concentricity of the cylinder 13 and the slide 12, thereby effectively improving the accuracy of the alignment and the accuracy of the overall detection results, and effectively avoiding the existing initial alignment using a laser alignment instrument. The problem of difficult determination of the reference, time-consuming and labor-intensive, and poor accuracy.

[0088] So far, the technical solution of the present invention has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can split and combine the technical solutions in the above embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present invention will fall within the protection scope of the present invention.

Claims

1. A method for detecting the coaxiality of a reciprocating compressor, characterized in that: include: Place the launch target assembly into the compressor body and turn on the launch target switch; Placing an alignment tool in the slideway of the compressor to align the light emitted by the emission target; Installing a receiving target assembly in the slideway to determine a reference position for detection; The receiving target assembly is installed in the cylinder of the compressor, and the concentricity deviation value of the slideway and the cylinder is determined according to the reference position.

2. The method for detecting the coaxiality of a reciprocating compressor according to claim 1, characterized in that: The launch target assembly includes the launch target and a launch target bracket; the launch target bracket includes a first bracket platform and a bracket leg, one end of the bracket leg is connected to the first bracket platform; the bracket leg is provided with an adjustment knob; The step of placing the launch target assembly into the compressor body comprises: Installing the launch target bracket in the compressor body; Then, the launch target is mounted on the first support platform, and the adjusting knob is adjusted so that the bottom of the support leg abuts against the bottom wall of the fuselage.

3. The method for detecting the coaxiality of a reciprocating compressor according to claim 2, characterized in that: The alignment tool comprises a center disk, the center of which has a center hole; The step of placing the alignment tool in the slideway to align the light emitted by the emission target includes: Selecting at least two alignment points on the slideway, and placing one alignment tool at each of the at least two alignment points; Adjusting the height of the launch target support so that the laser beam emitted by the launch target can hit the central disk of the alignment tool close to the launch target; Rotating the emission target until the laser beam passes through the center hole of each alignment tool; The screws at the bottom of the bracket legs are tightened to fix the launch target bracket to the compressor body.

4. The method for detecting the coaxiality of a reciprocating compressor according to claim 3, characterized in that: The alignment tool comprises three support rods connected to the central disc, and the ends of the three support rods form a circle with the same diameter as the inner wall of the slideway; The step of placing one alignment tool at each of at least two alignment locations comprises: Place each of the alignment tools at the corresponding alignment position, and press one of the support rods of each of the alignment tools against the top surface of the inner wall of the slide, and the two support rods at the bottom of each of the alignment tools respectively abut against a position on the inner wall of the slide away from its edge.

5. The method for detecting the coaxiality of a reciprocating compressor according to claim 1, characterized in that: The receiving target assembly comprises a receiving target and a receiving target bracket, the receiving target is rotatably connected to the receiving target bracket, and the receiving target comprises a receiving target body and a positioning support rod; The step of installing the receiving target assembly into the slideway of the compressor and determining the reference position for detection comprises: Selecting at least two measuring points in the slideway; A receiving target and a receiving target bracket are installed at one of the measuring positions, and the lens height of the receiving target is adjusted to the inner radius of the slideway. The horizontal distance from a measuring position in the slideway to the transmitting target is input into the host, and the receiving target is rotated so that the positioning support rod can abut against different positions of the inner wall of the slideway. The host is controlled to obtain the coordinates of at least five different positions of the positioning support rod on the inner wall of the slideway, and then the receiving target and the receiving target bracket are installed at the next measuring position in the slideway, and the horizontal distance from the measuring position to the transmitting target and the coordinates of at least five different positions of the positioning support rod on the inner wall of the slideway are detected, until all the measuring positions are detected; The host is then controlled to calculate the concentricity deviation values ​​between different measuring points and record the calculation results to determine the final center coordinates of the slideway and use them as the reference points.

6. The method for detecting the coaxiality of a reciprocating compressor according to claim 5, characterized in that: The step of installing the receiving target assembly in the cylinder and determining the concentricity deviation value of the slideway and the cylinder according to the reference position comprises: selecting at least two measuring points in the cylinder; A receiving target and a transmitting target bracket are installed at one of the measuring positions, and the center height of the receiving target lens is adjusted to the inner radius of the cylinder body. The horizontal distance between one of the measuring positions in the cylinder and the transmitting target is input into the host computer, and the receiving target is rotated so that the positioning support rod can abut against different positions of the inner wall of the cylinder. The host computer is controlled to obtain the coordinates of at least five different positions of the positioning support rod on the inner wall of the cylinder. Then, the receiving target and the receiving target bracket are installed at the next measuring position in the cylinder, and the distance between the measuring position and the transmitting target and the coordinates of at least five different positions of the positioning support rod on the inner wall of the cylinder are detected, until all the measuring positions are detected; Controlling the host to calculate the concentricity deviation value of the cylinder and recording the calculation result; According to the acquired reference position of the slide, the concentricity deviation value of the cylinder and the horizontal distance from each measuring position in the cylinder to the launch target, the host is controlled to calculate and record the concentricity deviation value between the slide and the cylinder.

7. The method for detecting the coaxiality of a reciprocating compressor according to claim 6, characterized in that: The step of sequentially inputting the horizontal distance between each of the measuring points in the cylinder and the launch target in the host comprises: A ruler is used to measure the horizontal distance between each of the measuring points in the cylinder and the launch target, and the measured distances are input into the main engine in sequence.

8. A alignment tool, characterized in that: The method can be applied to the coaxiality detection method of a reciprocating compressor according to any one of claims 1 to 7 to align the compressor.

9. The alignment tool according to claim 8, characterized in that: The alignment tool comprises a central disc and three supporting rods connected to the central disc. The center of the central disk has a central hole, and the central hole is used for allowing the light emitted by the emission target to pass through; The ends of the three support rods form a circle, and the three support rods are respectively abutted against different positions of the inner wall of the slideway.

10. The alignment tool according to claim 9, characterized in that: The diameter of the central hole is 2.5 mm.

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