Oil-free screw compressor and method for producing the same

Abstract

The application belongs to the technical field of compressors, and particularly relates to an oil-free screw compressor and a production method thereof. The production method of the oil-free screw compressor comprises the following steps: part manufacturing, part finishing, deburring treatment of the compressor shell by using a deburring device; main machine assembly: sequentially performing cleaning, bearing pre-assembly, male and female rotor assembly, end cover assembly and gap detection on the parts, completing screw main machine assembly, main machine performance testing, whole machine assembly, whole machine debugging and delivery. The deburring device is arranged to perform deburring treatment on the compressor shell, so that the efficiency and quality of the deburring process can be improved, and the assembly quality of the shell is ensured.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, and particularly relates to an oil-free screw compressor and its manufacturing method. Background Technology

[0002] The screw compressor market is relatively mature and stable. In recent years, with the increasing number of compressor manufacturers, industry competition has become increasingly fierce. Manufacturing screw compressors with simple structure, low cost, excellent performance, and strong market competitiveness is the constant goal pursued by all compressor manufacturers.

[0003] A screw compressor is a positive displacement gas compression machine that uses rotary motion. Gas compression is achieved by changing the volume of the casing, which in turn is achieved by the rotational motion of a pair of rotors within the casing. As the container for compressed gas and the support for the screw compressor rotor components, the casing requires high strength and high precision in machining; therefore, the casing is a very important part of the screw compressor.

[0004] Screw compressors include components such as housing and screw. After casting, the housing of a screw compressor needs to be precision machined in a machining center, such as end milling, drilling and tapping. However, end milling and drilling will produce a lot of burrs and flanges. The current method of deburring is to manually deburr with a file. This method is inefficient, difficult to control the quality and easy to miss some places where burrs are not deburred. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned technical problems by providing an oil-free screw compressor and its manufacturing method, thereby improving the efficiency and quality of the deburring process and ensuring the assembly quality of the housing.

[0006] In view of this, the present invention provides a method for producing an oil-free screw compressor, comprising the following steps: S1. Component manufacturing: Complete the blank manufacturing of housing, male and female rotors, main shaft, end cover and bearing housing respectively; S2. Component finishing: Rough machining, aging treatment, finishing and targeted heat treatment are performed on each component obtained in step S1. S3. Use a deburring device to deburr the compressor housing; S4. Main Unit Assembly: Clean the parts in sequence, pre-install the bearings, assemble the male and female rotors, assemble the end caps, and check the gaps to complete the assembly of the screw main unit. S5. Main unit performance test: The screw main unit assembled in step S4 is subjected to no-load running-in test, temperature rise test, noise test, vibration test and airtightness test to screen qualified main units; S6. Assembly: Assemble the qualified screw compressor unit from step S5 with the motor and control system to form a complete screw compressor. S7. Overall Debugging and Shipment: Perform overall load debugging on the screw compressor assembled in step S6. After the debugging is qualified, package it and ship it out of the factory.

[0007] In this technical solution, by setting a deburring device to deburr the compressor housing, the efficiency and quality of the deburring process can be improved, and the assembly quality of the housing can be guaranteed.

[0008] Furthermore, the deburring device for screw compressor parts includes: A positioning component for fixing the compressor housing; A robotic arm equipped with a cutting tool assembly for grinding the compressor housing.

[0009] In this technical solution, the compressor housing is fixed by a positioning component, and then the robotic arm moves according to the program settings to carry the cutting tool assembly to grind and deburr the compressor housing. This automated method can improve the efficiency and quality of the deburring process and ensure the assembly quality of the housing.

[0010] Furthermore, the positioning component includes: A base, which is fixedly mounted next to the robotic arm; The positioning platform is fixedly mounted on the machine base and is used to fix the compressor housing.

[0011] Furthermore, a tilting motor is fixedly installed on the base, and a positioning table is rotatably mounted on the base, with the positioning table connected to the output end of the tilting motor.

[0012] In this technical solution, when one side of the housing is polished, if the rotation of the robotic arm joint is inconvenient or interferes with the machining of the side of the part, a starting flip motor can be set to rotate the positioning table and rotate the part, thereby changing the position of the housing so that the machining surface can be easily polished by the tool assembly on the robotic arm, increasing the convenience of deburring the part.

[0013] Furthermore, the positioning stage includes: The base is rotatably connected to the machine base; Mounting plate, which is fixedly connected to the base, has multiple positioning holes for connecting with positioning pins, which are used to be inserted into the end holes of the compressor housing for positioning. A pressure plate assembly for pressing the compressor housing onto a mounting plate.

[0014] Furthermore, the pressure plate assembly includes: A sliding block is provided on the mounting plate with multiple T-shaped grooves along the circumferential direction, and the sliding block is slidably disposed in the T-shaped grooves; A threaded rod, the lower end of which is fixedly connected to a sliding block; A pressure block, which is slidably sleeved on a threaded rod; A lock nut, which is threaded onto a threaded rod.

[0015] In this technical solution, the positioning pin is fixed to the positioning hole on the mounting plate by means of threaded connection or other means during machine adjustment according to the part specifications. Then, the housing is placed on the mounting plate. During the placement process, the positioning pin is inserted into the end hole of the housing to position the housing. Then, the sliding block in the T-slot is slid to move the sliding block close to the housing until it is below the housing. The sliding pressure block is pressed against the surface of the housing. Finally, the locking nut is tightened to completely fix the housing.

[0016] Furthermore, there are at least two pressure plate assemblies.

[0017] Furthermore, the positioning components include two, which switch positions via a rotary component, allowing the two positioning components to alternately reach the processing position and the clamping position.

[0018] Furthermore, the slewing assembly includes: The fixing frame is fixedly installed; A rotary table, which is rotatably mounted on a fixed frame, and two positioning components are symmetrically arranged on the surface of the rotary table; A rotary motor is fixedly mounted on a fixed frame and its output end is connected to the rotary table to drive the rotary table to rotate.

[0019] In this technical solution, a rotary motor drives a rotary table to rotate, so that two positioning components on the rotary table are located at the processing position and the clamping position, respectively. The processing position can be polished by the tool assembly on the robotic arm, and the clamping position is used to clamp the housing onto the positioning components. By setting the rotary components, polishing can be carried out and loading and clamping can be carried out at the same time, thereby improving production efficiency.

[0020] Furthermore, the tool assembly includes: A drive motor, which is fixedly mounted on the robotic arm; A tool holder, which is connected to the output end of a drive motor; The grinding tool is connected to the guide sleeve via a keyway. One end of the grinding tool is provided with a cutting head, and the other end is an enlarged section. The enlarged section is slidably disposed in the sliding groove of the tool sleeve, and an adjusting spring is provided between the enlarged section and the top of the sliding groove.

[0021] In this technical solution, the outer contour of the housing and the size of the burr flange are different, so they are not consistent. The adjustment spring can provide a certain degree of flexible displacement when the tool holder encounters a large flange, which can reduce the problem of frequent tool breakage.

[0022] Furthermore, an oil-free screw compressor is manufactured using the aforementioned method for producing an oil-free screw compressor.

[0023] The beneficial effects of this invention are: 1. By setting up a deburring device to deburr the compressor housing, the efficiency and quality of the deburring process can be improved, ensuring the assembly quality of the housing.

[0024] 2. The compressor housing is fixed by the positioning component, and then the robotic arm moves according to the program setting to carry the cutting tool assembly to grind and deburr the compressor housing. This automated method can improve the efficiency and quality of the deburring process and ensure the assembly quality of the housing.

[0025] 3. After one side of the housing is polished, if the rotation of the robotic arm joint is inconvenient or interferes when machining the side of the part, the starting flip motor can be set to rotate the positioning table and the part, thereby changing the position of the housing so that the machining surface can be easily polished by the tool assembly on the robotic arm, increasing the convenience of deburring the part.

[0026] 4. By setting up a rotary component, grinding and loading can be carried out simultaneously, improving production efficiency.

[0027] 5. The outer contour of the housing and the size of the burrs and flanges are not uniform, so there is no consistency. Setting an adjustment spring can allow the tool holder to have a certain degree of flexible displacement when it encounters a large flange, which can reduce the problem of frequent tool breakage. Attached Figure Description

[0028] Figure 1 This is a three-dimensional view of the deburring device; Figure 2 It refers to the positional relationship between two positioning components; Figure 3 This is a 3D view of the positioning components; Figure 4 It is a 3D view of the positioning platform; Figure 5 This is a cross-sectional view of the tool assembly.

[0029] The markings in the diagram are as follows: 1. Positioning assembly; 2. Robotic arm; 3. Base; 4. Positioning table; 5. Tilting motor; 6. Base; 7. Mounting plate; 8. Positioning hole; 9. End hole; 10. Pressure plate assembly; 11. Sliding block; 12. T-slot; 13. Threaded rod; 14. Pressure block; 15. Locking nut; 16. Fixing frame; 17. Rotary table; 18. Rotary motor; 19. Drive motor; 20. Tool holder; 21. Grinding tool; 22. Keyway; 23. Tool head; 24. Enlarged section; 25. Sliding groove; 26. Adjusting spring; 27. Tool assembly; 28. Housing. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] In the description of this application, 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 exemplary embodiments according to this application. 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 drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0035] Example 1: A method for manufacturing an oil-free screw compressor includes the following steps: S1. Component manufacturing: Complete the blank manufacturing of housing 28, male and female rotors, main shaft, end cover and bearing seat respectively; S2. Component finishing: Rough machining, aging treatment, finishing and targeted heat treatment are performed on each component obtained in step S1. S3. Use a deburring device to deburr the compressor housing 28; S4. Main Unit Assembly: Clean the parts in sequence, pre-install the bearings, assemble the male and female rotors, assemble the end caps, and check the gaps to complete the assembly of the screw main unit. S5. Main unit performance test: The screw main unit assembled in step S4 is subjected to no-load running-in test, temperature rise test, noise test, vibration test and airtightness test to screen qualified main units; S6. Assembly: Assemble the qualified screw compressor unit from step S5 with the motor and control system to form a complete screw compressor. S7. Overall Debugging and Shipment: Perform overall load debugging on the screw compressor assembled in step S6. After the debugging is qualified, package it and ship it out of the factory.

[0036] By setting up a deburring device to deburr the compressor housing 28, the efficiency and quality of the deburring process can be improved, ensuring the assembly quality of the housing 28.

[0037] Example 2: like Figure 1-5 As shown, the deburring device for screw compressor parts includes: Positioning component 1, which is used to fix the compressor housing 28; The robotic arm 2 is equipped with a tool assembly 27, which is used to polish the compressor housing 28.

[0038] The compressor housing 28 is fixed by the positioning component 1, and then the robotic arm 2 moves according to the program setting to carry the cutting tool component 27 to grind and deburr the compressor housing 28. This automated method can improve the efficiency and quality of the deburring process and ensure the assembly quality of the housing 28.

[0039] The positioning component 1 includes: Base 3, which is fixedly mounted next to the robotic arm 2; Positioning platform 4 is fixedly mounted on base 3 and is used to fix compressor housing 28.

[0040] A flip motor 5 is fixedly installed on the base 3, and a positioning table 4 is rotatably installed on the base 3. The positioning table 4 is connected to the output end of the flip motor 5.

[0041] After one side of the housing 28 is polished, if the joint of the robotic arm 2 is inconvenient to rotate or interferes when machining the side of the part, the starting flip motor 5 can be set to rotate the positioning table 4, which will rotate the part, thereby changing the position of the housing 28 so that the machining surface can be easily polished by the tool assembly 27 on the robotic arm 2, increasing the convenience of deburring the part.

[0042] The positioning stage 4 includes: Base 6, which is rotatably connected to the base 3; Mounting plate 7 is fixedly connected to base 6. Multiple positioning holes 8 are provided on mounting plate 7. The positioning holes 8 are used to connect with positioning pins. The positioning pins are used to be inserted into the end holes 9 of compressor housing 28 for positioning. Pressure plate assembly 10, which is used to press the compressor housing 28 onto the mounting plate 7.

[0043] The pressure plate assembly 10 includes: The sliding block 11 has multiple T-shaped grooves 12T formed along the circumferential direction on the mounting plate 7, and the sliding block 11 is slidably disposed in the T-shaped grooves 12T; Threaded rod 13, the lower end of which is fixedly connected to sliding block 11; Pressure block 14, which is slidably sleeved on threaded rod 13; Locking nut 15, which is threadedly connected to threaded rod 13.

[0044] According to the part specifications, during machine setup, the positioning pin is fixed to the positioning hole 8 on the mounting plate 7 by means of threaded connection, etc. Then, the housing 28 is placed on the mounting plate 7. During the placement process, the positioning pin is inserted into the end hole 9 of the housing 28 to position the housing 28. Then, the sliding block 11 in the T-slot 12T is slid to move the sliding block 11 close to the housing 28 until it is below the housing 28. The sliding pressure block 14 is pressed against the surface of the housing 28. Finally, the locking nut 15 is tightened to completely fix the housing 28.

[0045] There are at least two pressure plate assemblies 10. The positioning assembly 1 includes two components, which switch positions through a rotary assembly, so that the two positioning assemblies 1 take turns reaching the processing position and the clamping position.

[0046] The rotary assembly includes: Fixing frame 16, the fixing frame 16 is fixedly installed; A rotary table 17 is rotatably mounted on a fixed frame 16, and two positioning components 1 are symmetrically arranged on the surface of the rotary table 17. A rotary motor 18 is fixedly mounted on a fixed frame 16 and its output end is connected to a rotary table 17, which can drive the rotary table 17 to rotate.

[0047] The rotary motor 18 drives the rotary table 17 to rotate, so that the two positioning components 1 on the rotary table 17 are respectively located in the processing position and the clamping position. The processing position can be polished by the tool assembly 27 on the robotic arm 2, and the clamping position is used to clamp the housing 28 onto the positioning component 1. By setting the rotary components, polishing can be carried out at the same time as loading and clamping, thereby improving production efficiency.

[0048] Example 3: like Figure 5 As shown, the tool assembly 27 includes: A drive motor 19 is fixedly mounted on the robotic arm 2. Tool holder 20, which is connected to the output end of drive motor 19; The grinding blade 21 is connected to the guide sleeve via a keyway 22. One end of the grinding blade 21 is provided with a blade head 23, and the other end is an enlarged section 24. The enlarged section 24 is slidably disposed in the sliding groove 25 of the blade sleeve 20. An adjusting spring 26 is provided between the enlarged section 24 and the top of the sliding groove 25.

[0049] The outer contour of the housing 28 and the size of the burrs and flanges are not uniform. Therefore, the adjustment spring 26 can be set to allow for some flexible displacement when the tool holder encounters a large flange, which can reduce the problem of frequent tool breakage.

[0050] An oil-free screw compressor is manufactured using the aforementioned method for producing an oil-free screw compressor.

[0051] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for producing an oil-free screw compressor, characterized in that... This includes the following steps: S1. Component manufacturing: Complete the blank manufacturing of housing (28), male and female rotors, main shaft, end cover and bearing seat respectively; S2. Component finishing: Rough machining, aging treatment, finishing and targeted heat treatment are performed on each component obtained in step S1. S3. Use a deburring device to deburr the compressor housing (28); S4. Main Unit Assembly: Clean the parts in sequence, pre-install the bearings, assemble the male and female rotors, assemble the end caps, and check the gaps to complete the assembly of the screw main unit. S5. Main unit performance test: The screw main unit assembled in step S4 is subjected to no-load running-in test, temperature rise test, noise test, vibration test and airtightness test to screen qualified main units; S6. Assembly: Assemble the qualified screw compressor unit from step S5 with the motor and control system to form a complete screw compressor. S7. Overall Debugging and Shipment: Perform overall load debugging on the screw compressor assembled in step S6. After the debugging is qualified, package it and ship it out of the factory.

2. The method for producing an oil-free screw compressor according to claim 1, characterized in that, Deburring devices for screw compressor parts include: Positioning component (1), the positioning component (1) is used to fix the compressor housing (28); The robotic arm (2) is equipped with a cutting tool assembly (27) for grinding the compressor housing (28).

3. The method for producing an oil-free screw compressor according to claim 2, characterized in that, The positioning component (1) includes: The base (3) is fixedly installed next to the robotic arm (2); Positioning platform (4) is fixedly mounted on the base (3) and is used to fix the compressor housing (28).

4. The method for producing an oil-free screw compressor according to claim 3, characterized in that, A flip motor (5) is fixedly installed on the base (3), and a positioning table (4) is rotatably installed on the base (3). The positioning table (4) is connected to the output end of the flip motor (5).

5. The method for producing an oil-free screw compressor according to claim 4, characterized in that, The positioning stage (4) includes: Base (6), which is rotatably connected to the base (3); Mounting plate (7), which is fixedly connected to base (6), and a plurality of positioning holes (8) are provided on mounting plate (7). The positioning holes (8) are used to connect with positioning pins, and the positioning pins are used to be inserted into the end face holes (9) of compressor housing (28) for positioning. A pressure plate assembly (10) is used to press the compressor housing (28) onto the mounting plate (7).

6. The method for producing an oil-free screw compressor according to claim 5, characterized in that, The pressure plate assembly (10) includes: The sliding block (11) has multiple T-shaped grooves (12T) opened along the circumferential direction on the mounting plate (7), and the sliding block (11) is slidably disposed in the T-shaped grooves (12T); A threaded rod (13), the lower end of which is fixedly connected to a sliding block (11); Pressure block (14), which is slidably sleeved on threaded rod (13); Locking nut (15), which is threaded onto threaded rod (13).

7. The method for producing an oil-free screw compressor according to claim 6, characterized in that, The positioning component (1) includes two components. The two positioning components (1) switch positions through a rotary component, so that the two positioning components (1) take turns to reach the processing position and the clamping position.

8. The method for producing an oil-free screw compressor according to claim 7, characterized in that, The rotary assembly includes: A fixing frame (16) is fixedly installed; A rotary table (17) is rotatably mounted on a fixed frame (16), and two positioning components (1) are symmetrically arranged on the surface of the rotary table (17). A rotary motor (18) is fixedly mounted on a fixed frame (16) and its output end is connected to a rotary table (17) to drive the rotary table (17) to rotate.

9. The method for producing an oil-free screw compressor according to claim 8, characterized in that, The tool assembly (27) includes: A drive motor (19) is fixedly mounted on the robotic arm (2); A tool holder (20) is connected to the output end of a drive motor (19); The grinding blade (21) is connected to the guide sleeve via a keyway (22). One end of the grinding blade (21) is provided with a blade head (23), and the other end is an enlarged section (24). The enlarged section (24) is slidably disposed in the sliding groove (25) of the blade sleeve (20). An adjusting spring (26) is provided between the enlarged section (24) and the top of the sliding groove (25).

10. An oil-free screw compressor, characterized in that, It is manufactured using the production method of the oil-free screw compressor according to any one of claims 1-9.

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