Scroll compressor assembly precision gauge and detection method thereof

Abstract

The application discloses a scroll compressor assembly precision gauge and a detection method thereof, and relates to the technical field of detection equipment, in particular to a scroll compressor assembly precision gauge and a use method thereof. The application comprises a crankshaft positioning and clamping structure, a detection structure and a rotary driving part. The detection structure is mounted on the crankshaft positioning and clamping structure through screws and is connected with an external computer. The crankshaft positioning and clamping structure is sleeved on a crankshaft of a compressor. The rotary driving part is inserted into the crankshaft positioning and clamping structure and is connected with the crankshaft of the compressor through a positioning pin. The technical scheme of the application solves the problems in the prior art, such as inconvenient operation of the gauge, low detection precision, high technical requirement for operators, unstable fixation of a magnetic base, easy introduction of iron filings into the compressor, compressor damage and the like.

Description

Technical Field

[0001] This invention relates to a scroll compressor assembly accuracy gauge and its testing method, which falls under the technical field of testing equipment, and particularly to a scroll compressor assembly accuracy gauge and its usage method. Background Technology

[0002] In the manufacturing process of current scroll compressors, the perpendicularity of the crankshaft to the upper and lower supports is one of the most critical assembly dimensions. Poor perpendicularity between the crankshaft and the upper and lower supports will directly affect the compressor's performance and indirectly lead to abnormal stator-rotor clearance in the compressor motor. Abnormal stator-rotor clearance during compressor operation will cause problems such as rotor rubbing and sparking, posing a significant safety hazard. Currently used perpendicularity gauges are broadly divided into two categories, both using a dial indicator as the primary measuring tool: the first category uses an integrated gauge, and the second category uses a separate gauge for the measuring unit and the rotary drive mechanism.

[0003] The shortcomings of existing technologies are as follows: Firstly, because the first type of gauge uses an integrated structure, the measurement accuracy is affected when the operator rotates the gauge during inspection, thus its application is limited. Secondly, the second type of gauge often uses a magnetic seat to attach the crankshaft to fix the measuring part. This fixing method has two drawbacks: First, the magnetic seat magnetizes the crankshaft, and the bottom of the magnetic seat often attracts fine iron filings that cannot be cleaned. This allows the iron filings at the bottom of the magnetic seat to be attracted by the magnetized crankshaft and carried into the compressor. The resulting foreign matter can cause abnormal wear on the compressor and ultimately damage it. Secondly, because the magnetic seat itself has limited adsorption force, accidental contact by the operator during testing can cause displacement of the measuring part, leading to distorted test results. Furthermore, previous gauges and testing methods suffer from complex operation, low testing efficiency, and accuracy limitations imposed by the operator's skill level.

[0004] In view of the problems existing in the prior art, it is necessary to study and design a new type of scroll compressor assembly precision gauge and its detection method to overcome the problems existing in the prior art. Summary of the Invention

[0005] To address the technical problems of existing inspection tools, such as inconvenient operation, low detection accuracy, high operator skill requirements, unstable magnetic base fixation, and the potential for iron filings to be introduced into the compressor, leading to compressor damage, this invention provides a scroll compressor assembly accuracy inspection tool and its detection method. This invention primarily utilizes an inspection tool and a rotating handle, respectively fixed to the eccentric part of the compressor crankshaft. A displacement sensor on the inspection tool contacts the upper support mirror surface of the compressor. The operator rotates the crank handle, causing the crankshaft and inspection tool to rotate. The sensor probe records the displacement change relative to the upper support mirror surface during one rotation, thereby achieving rapid and accurate detection of the scroll compressor assembly accuracy.

[0006] The technical means employed in this invention are as follows:

[0007] A scroll compressor assembly precision inspection fixture includes: a crankshaft positioning and clamping structure, an inspection structure, and a rotary drive unit;

[0008] Furthermore, the detection structure is mounted on the crankshaft positioning clamping structure with screws and connected to an external computer;

[0009] Furthermore, the crankshaft positioning and clamping structure is mounted on the crankshaft of the compressor;

[0010] Furthermore, the rotary drive unit is inserted inside the crankshaft positioning and clamping structure and connected to the compressor crankshaft via a positioning pin.

[0011] Furthermore, the crankshaft positioning and clamping structure includes: a positioning sleeve, a connecting rod, a clamping plate, and a spring;

[0012] Furthermore, the positioning sleeve is machined with a through mounting shaft hole;

[0013] Furthermore, a clamping plate is mounted on one side of the positioning sleeve via a connecting rod;

[0014] Furthermore, a spring is fitted between the upper part of the clamping plate and the positioning sleeve. Under the action of the spring, the lower part of the clamping plate is inserted into the notch at the lower part of the positioning sleeve to clamp the crankshaft fitted inside the positioning sleeve.

[0015] Furthermore, the upper end of the positioning sleeve is provided with a support plate mounting groove for installing the detection structure.

[0016] Furthermore, a magnet is fitted on the lower inner side of the clamping plate, and the clamping plate is attracted to the crankshaft by the magnet, which increases the fixing effect and clamping force.

[0017] Furthermore, the detection structure includes: a protective cover, a displacement sensor, a connecting ring, and a support plate;

[0018] Furthermore, the support plate is mounted on the support plate mounting groove provided on the upper end of the positioning sleeve by screws;

[0019] Furthermore, the connecting ring is installed on the upper part of the support plate;

[0020] Furthermore, the displacement sensor is fixedly mounted on the upper part of the connecting ring, and its probe passes downward through the central circular hole of the connecting ring and abuts against the upper support mirror surface of the compressor;

[0021] Furthermore, the displacement sensor is an ultra-high precision displacement sensor with an accuracy of up to 1μm, which is connected to an external computer;

[0022] Furthermore, the protective cover is installed on the outside of the displacement sensor and is fixedly assembled with the support plate.

[0023] Furthermore, the rotary drive unit is a detachable rotary crank;

[0024] Furthermore, the rotary crank includes: a rotary shaft, a positioning pin A, a positioning pin B, a rocker arm, and a handwheel;

[0025] Furthermore, one end of the joystick is connected to the upper part of the rotating shaft, and the other end is equipped with a handball;

[0026] Furthermore, locating pins A and B, corresponding to the top pin holes of the crankshaft, are provided on the bottom end face of the rotating shaft.

[0027] Furthermore, the method for detecting the assembly accuracy of a scroll compressor is characterized by comprising the following steps:

[0028] S1. The operator presses the clamping plate towards the center of the positioning sleeve with their hand.

[0029] S2. The operator places the mounting shaft hole on the positioning sleeve from top to bottom onto the eccentric part of the compressor crankshaft. At the same time, the bottom of the positioning sleeve contacts the shoulder of the compressor crankshaft, and the probe of the displacement sensor contacts the upper support mirror surface of the compressor.

[0030] S3. The operator releases the clamping plate, which returns to its original position under the action of the spring. Its bottom is attracted to the eccentric part of the crankshaft by a magnet and clamps it, thus completing the clamping and fixing of the fixture and the compressor crankshaft.

[0031] S4. The operator passes the rotating handle through the mounting shaft hole on the positioning sleeve from top to bottom. The two positioning pins A and B at the bottom of the rotating handle mate with the blind hole at the top of the eccentric part of the compressor crankshaft. After installation, the rotating handle should not contact the positioning sleeve.

[0032] S5. The operator uses his hand to rotate the crank handle horizontally around the Z-axis of the compressor. The rotating crank handle drives the crankshaft of the compressor to rotate through the bottom positioning pin A and positioning pin B. The crankshaft of the compressor drives the gauge fixed on the eccentric part of the crankshaft to rotate. The probe of the displacement sensor is supported on the mirror surface on the compressor to complete the axial detection.

[0033] S6. The operator reads and records the measurement results from the computer connected to the displacement sensor;

[0034] S7. The operator removes the rotary handle, presses the clamping plate to remove the gauge, and completes the inspection work.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. The scroll compressor assembly accuracy gauge and its testing method provided by the present invention have a simple structure. The gauge adopts a separate structure of gauge and rotary handle, which avoids the influence of rotary handle on the measurement accuracy of gauge during rotation.

[0037] 2. The scroll compressor assembly accuracy inspection tool and its testing method provided by the present invention are simple and convenient to operate, and require very low skill level from the operator. The operator can start working after only simple training.

[0038] 3. The scroll compressor assembly precision gauge and its testing method provided by the present invention use an ultra-high precision displacement sensor with an accuracy of up to 1μm, which has high testing accuracy and good stability.

[0039] In summary, the technical solution of this invention solves the problems of inconvenient operation of the inspection tool, low detection accuracy, high technical requirements for operators, unstable magnetic base fixation, and easy introduction of iron filings into the compressor, which can damage the compressor. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the present invention;

[0042] Figure 2 This is a top view of the present invention;

[0043] Figure 3 This is a schematic diagram of the working state of the present invention;

[0044] Figure 4 This is a top view of the invention in operation.

[0045] In the diagram: 1. Protective cover; 2. Displacement sensor; 3. Connecting ring; 4. Support plate; 5. Positioning sleeve; 6. Magnet; 7. Connecting rod; 8. Clamping plate; 9. Spring; 10. Rotary crank; 11. Compressor; 12. Rotary shaft; 13. Positioning pin A; 14. Positioning pin B; 15. Rocker arm; 16. Handball. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0053] like Figure 1-4 As shown, the present invention provides a scroll compressor assembly precision gauge including: a crankshaft positioning clamping structure, a detection structure, and a rotary drive unit; the detection structure is mounted on the crankshaft positioning clamping structure by screws and connected to an external computer; the crankshaft positioning clamping structure is fitted onto the crankshaft of the compressor 11; the rotary drive unit is inserted into the inside of the crankshaft positioning clamping structure and connected to the crankshaft of the compressor 11 by a positioning pin.

[0054] The crankshaft positioning and clamping structure includes: a positioning sleeve 5, a connecting rod 7, a clamping plate 8, and a spring 9; the positioning sleeve 5 has a through mounting shaft hole; the clamping plate 8 is mounted on one side of the positioning sleeve 5 via the connecting rod 7; the upper part of the clamping plate 8 is mounted between the positioning sleeve 5 and the upper part of the positioning sleeve 8, and the lower part of the clamping plate 8 is inserted into the notch at the lower part of the positioning sleeve 5 under the action of the spring 9, clamping the crankshaft fitted inside the positioning sleeve 5; the upper end of the positioning sleeve 5 is provided with a support plate mounting groove for mounting the testing structure.

[0055] A magnet 6 is fitted on the lower inner side of the clamping plate 8. The clamping plate 8 is attracted to the crankshaft by the magnet 6, which increases the fixing effect and clamping force.

[0056] The detection structure includes: a protective cover 1, a displacement sensor 2, a connecting ring 3, and a support plate 4; the support plate 4 is mounted on the support plate mounting groove at the upper end of the positioning sleeve by screws; the connecting ring 3 is mounted on the upper part of the support plate 4; the displacement sensor 2 is fixedly mounted on the upper part of the connecting ring 3, and its probe passes downward through the central circular hole of the connecting ring 3 and abuts against the upper support mirror surface of the compressor 11; the displacement sensor 2 is an ultra-high precision displacement sensor with an accuracy of up to 1μm, and is connected to an external computer; the protective cover 1 is mounted on the outside of the displacement sensor 2 and is fixedly assembled with the support plate 4.

[0057] The rotary drive unit is a detachable rotary crank 10; the rotary crank 10 includes: a rotary shaft 12, a positioning pin A13, a positioning pin B14, a rocker arm 15, and a hand ball 16; one end of the rocker arm 15 is connected to the upper part of the rotary shaft 12, and the other end is equipped with the hand ball 16; the bottom end surface of the rotary shaft 12 is provided with positioning pins A13 and B14 corresponding to the top pin holes of the crankshaft.

[0058] A method for detecting the assembly accuracy of a scroll compressor using a gauge, characterized by the following steps:

[0059] S1. The operator presses the clamping plate 8 towards the center of the positioning sleeve 5 with his hand;

[0060] S2. The operator places the mounting shaft hole on the positioning sleeve 5 from top to bottom onto the eccentric part of the crankshaft of the compressor 11. At the same time, the bottom of the positioning sleeve 5 contacts the shoulder of the crankshaft of the compressor 11, and the probe of the displacement sensor 2 contacts the upper support mirror surface of the compressor 11.

[0061] S3. The operator releases the clamping plate 8, and the clamping plate 8 returns to its original position under the action of the spring 9. Its bottom is attracted to the eccentric part of the crankshaft by a magnet and clamps it, thus completing the clamping and fixing of the fixture and the crankshaft of the compressor 11.

[0062] S4. The operator passes the rotating handle 10 through the mounting shaft hole on the positioning sleeve 8 from top to bottom. The two positioning pins A13 and B14 at the bottom of the rotating handle 10 engage with the blind hole at the top of the eccentric part of the crankshaft of the compressor 11. After installation, the rotating handle 10 should not contact the positioning sleeve 5.

[0063] S5. The operator uses his hand to rotate the crank handle 10 horizontally around the Z-axis of the compressor. The crank handle 10 drives the crankshaft of the compressor 11 to rotate through the bottom positioning pin A13 and positioning pin B14. The crankshaft of the compressor 11 drives the gauge fixed to the eccentric part of the crankshaft to rotate. The probe of the displacement sensor 2 supports the mirror surface on the compressor 11 to complete the axial detection.

[0064] S6. The operator reads and records the measurement results from the computer connected to the displacement sensor;

[0065] S7. The operator removes the rotating handle 10, presses the clamping plate 8 to remove the gauge, and completes the inspection work.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precision inspection tool for scroll compressor assembly, characterized in that: The scroll compressor assembly precision gauge includes: a crankshaft positioning clamping structure, a detection structure, and a rotary drive unit; the detection structure is mounted on the crankshaft positioning clamping structure by screws and connected to an external computer; the crankshaft positioning clamping structure is fitted onto the crankshaft of the compressor (11); the rotary drive unit is inserted into the inside of the crankshaft positioning clamping structure and connected to the crankshaft of the compressor (11) by a positioning pin. The crankshaft positioning and clamping structure includes: a positioning sleeve (5), a connecting rod (7), a clamping plate (8), and a spring (9); the positioning sleeve (5) is machined with a through mounting shaft hole; a clamping plate (8) is mounted on one side of the positioning sleeve (5) via the connecting rod (7); a spring (9) is mounted between the upper part of the clamping plate (8) and the positioning sleeve (5), and under the action of the spring (9), the lower part of the clamping plate (8) is inserted into the notch at the lower part of the positioning sleeve (5) to clamp the crankshaft fitted inside the positioning sleeve (5); the upper end of the positioning sleeve (5) is provided with a support plate mounting groove for mounting the detection structure; The detection structure includes: a protective cover (1), a displacement sensor (2), a connecting ring (3), and a support plate (4); the support plate (4) is mounted on the support plate mounting groove provided on the upper end of the positioning sleeve by screws; the connecting ring (3) is installed on the upper part of the support plate (4); the displacement sensor (2) is fixedly mounted on the upper part of the connecting ring (3), and its probe passes downward through the central circular hole of the connecting ring (3) and abuts against the upper support mirror surface of the compressor (11); the displacement sensor (2) is connected to an external computer; the protective cover (1) is installed on the outside of the displacement sensor (2) and is fixedly assembled with the support plate (4); The rotary drive unit is a detachable rotary crank (10); the rotary crank (10) includes: a rotary shaft (12), a positioning pin A (13), a positioning pin B (14), a rocker arm (15), and a hand ball (16); one end of the rocker arm (15) is connected to the upper part of the rotary shaft (12), and the other end is equipped with a hand ball (16); the bottom end of the rotary shaft (12) is provided with positioning pin A (13) and positioning pin B (14) corresponding to the top pin hole of the crankshaft.

2. The scroll compressor assembly accuracy gauge according to claim 1, characterized in that: The clamping plate (8) is fitted with a magnet (6) on its lower inner side. The clamping plate (8) is attracted to the crankshaft by the magnet (6), which increases the fixing effect and clamping force.

3. The scroll compressor assembly accuracy gauge according to claim 1, characterized in that: The displacement sensor (2) is an ultra-high precision displacement sensor with an accuracy of up to 1μm.

4. A method for detecting the assembly accuracy of a scroll compressor as described in any one of claims 1-3, characterized in that... The detection method includes the following steps: S1. The operator presses the clamping plate (8) towards the center of the positioning sleeve (5) with his hand. S2. The operator places the mounting shaft hole on the positioning sleeve (5) from top to bottom on the crankshaft eccentric part of the compressor (11). At the same time, the bottom of the positioning sleeve (5) contacts the crankshaft shoulder of the compressor (11), and the probe of the displacement sensor (2) contacts the upper support mirror of the compressor (11). S3. The operator releases the clamping plate (8), and the clamping plate (8) is reset under the action of the spring (9). Its bottom is attracted to the eccentric part of the crankshaft by a magnet and clamped to complete the clamping and fixing of the fixture and the crankshaft of the compressor (11). S4. The operator passes the rotating handle (10) through the mounting shaft hole on the positioning sleeve (5) from top to bottom. The two positioning pins A (13) and B (14) at the bottom of the rotating handle (10) are engaged with the blind hole at the top of the eccentric part of the compressor (11) crankshaft. S5. The operator uses his hand to rotate the crank handle (10) horizontally around the Z-axis of the compressor. The crank handle (10) drives the crankshaft of the compressor (11) to rotate through the bottom positioning pin A (13) and positioning pin B (14). The crankshaft of the compressor (11) drives the gauge fixed on the eccentric part of the crankshaft to rotate. The probe of the displacement sensor (2) supports the mirror on the compressor (11) to complete the axial detection. S6. The operator reads and records the measurement results from the computer connected to the displacement sensor; S7. The operator removes the rotating handle (10), presses the clamping plate (8) to remove the gauge, and completes the inspection work.

5. The method for detecting the assembly accuracy of a scroll compressor according to claim 4, characterized in that: After the rotary handle (10) and the crankshaft of the compressor (11) are installed in place in step S4, the rotary handle (10) should not come into contact with the positioning sleeve (5).

Images