Tool for assembling scroll compressor and assembling method

Abstract

The invention discloses a tool for assembling a scroll compressor and an assembling method, the tool comprises an expansion sleeve II, an expansion sleeve I and a mandrel, the mandrel comprises a cylindrical surface I arranged at the upper end and a cylindrical surface III arranged at the lower end, a main bearing support is matched with the cylindrical surface I of the mandrel, and an auxiliary bearing support is matched with the cylindrical surface III of the mandrel; the outer side of the cylindrical surface I is sleeved with an expansion sleeve II, the inner wall of the expansion sleeve II is matched with the outer wall of the cylindrical surface I, and the lower end of the outer wall of the expansion sleeve II is matched with the inner wall of the lower end of the mounting hole of the main bearing support; the upper end of the expansion sleeve II is sleeved with the expansion sleeve I, the inner wall of the expansion sleeve II is matched with the upper end of the outer wall of the expansion sleeve II, and the outer wall of the expansion sleeve I is matched with the inner wall of the upper end of the mounting hole of the main bearing support. According to the invention, the mounting procedure can be simplified, auxiliary equipment and clamps are not needed to assist in assembly, the cost is low, and the matching precision is high.

Description

Technical Field

[0001] The invention relates to a tool for assembling a scroll compressor and an assembling method, belonging to the technical field of scroll compressor assembly. Background Art

[0002] The application of scroll compressors in the refrigeration industry is becoming more and more widespread. The existing scroll compressor consists of a fixed scroll and a movable scroll. Its working principle is as follows: the fixed scroll is equipped with a spiral scroll tooth, and the movable scroll cooperates with it and is also equipped with a spiral scroll tooth. The movable scroll is limited to relative translation between the movable and fixed scrolls through the movement between the cross ring and the upper support, so that the movable scroll and the fixed scroll can only cooperate to form multiple compression chambers with variable volumes. The movable scroll is connected to the drive shaft, and the motor drives the drive shaft to make the movable scroll orbit along its orbital orbit, thereby realizing the inhalation, compression and discharge of gas, and finally achieving the purpose of compressing the refrigerant.

[0003] In a fully enclosed compressor, the scroll component is installed inside the compressor casing. The casing consists of a shell, an upper cover and a lower cover, and the motor is usually fixed inside the shell. The upper end is provided with a main bearing support to support the movable scroll, and the lower end is provided with a secondary bearing. The drive shaft that drives the movable scroll is located between the main and secondary bearings. The coaxiality of the main and secondary bearings is crucial to the energy efficiency of the compressor. If the coaxiality is poor, it may lead to an increase in the input power of the compressor, a shortened life, or even failure to operate normally and be scrapped; in addition, the perpendicularity between the plane supporting the movable scroll on the main bearing and the drive shaft is also very critical. Poor verticality may lead to an increase in power and even affect normal operation.

[0004] In the assembly process of the prior art, the upper main bearing support is generally fixed by a tray, and the lower auxiliary bearing support is clamped by a clamp for assembly. The assembly also requires the assistance of special equipment for auxiliary installation to ensure the coaxiality of the main and auxiliary bearings and the verticality of the support surface and the drive shaft. In the above assembly process, the welding of the motor stator and the housing, the welding of the main bearing support and the welding of the auxiliary bearing support are respectively completed on different equipment, the assembly process is cumbersome, and the installation accuracy is seriously dependent on auxiliary tools, which increases the installation cost.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the deficiencies in the background technology, the present invention provides a tooling and an assembly method for a scroll compressor, which can simplify the installation procedure, does not require auxiliary equipment and fixtures to assist in assembly, has low cost and high matching precision.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A tool for assembling a scroll compressor, comprising an expansion sleeve II, an expansion sleeve I and a core shaft, wherein the core shaft comprises a cylindrical surface I arranged at the upper end and a cylindrical surface III arranged at the lower end, a main bearing support cooperates with the core shaft cylindrical surface I, and a secondary bearing support cooperates with the core shaft cylindrical surface III; An expansion sleeve II is sleeved on the outer side of the cylindrical surface I, the inner wall of the expansion sleeve II matches with the outer wall of the cylindrical surface I, and the lower end of the outer wall of the expansion sleeve II matches with the inner wall of the lower end of the mounting hole of the main bearing support; The expansion sleeve I is sleeved on the upper end of the expansion sleeve II, the inner wall of the expansion sleeve II matches with the upper end of the outer wall of the expansion sleeve II, and the outer wall of the expansion sleeve I matches with the inner wall of the upper end of the mounting hole of the main bearing support.

[0008] Furthermore, a slope IV is provided at the lower end of the cylindrical surface I, and a slope III is provided at the lower end of the inner wall of the expansion sleeve II, and the slope IV and the slope III cooperate with each other.

[0009] Furthermore, an upper end of the outer wall of the expansion sleeve II is provided with an inclined surface II, and an inner wall of the expansion sleeve I is provided with an inclined surface I, and the inclined surface II and the inclined surface I cooperate with each other.

[0010] Furthermore, the lower end of the outer wall of the expansion sleeve I extends outward to form a matching ring, and the outer end of the matching ring matches with the upper end of the main bearing support mounting hole; the upper end of the expansion sleeve I is a sealing plate with a bolt hole, and a bolt is provided at the bolt hole, and the bolt is installed on the upper end of the core shaft cylindrical surface I.

[0011] Furthermore, a plurality of side grooves I are provided on the side wall of the expansion sleeve I along its axial direction, and a plurality of side grooves II are provided on the side wall of the expansion sleeve II along its axial direction.

[0012] Furthermore, a main bearing support limit stop shoulder is provided at the lower end of the core shaft cylindrical surface I, so that the lower end surface of the main bearing support is close to the main bearing support limit stop shoulder.

[0013] Furthermore, two discs are provided in the middle section of the core shaft, and the side walls of the two discs form a cylindrical surface II, which matches the inner wall of the inner hole of the motor stator.

[0014] Furthermore, the lower side of the lower disc protrudes outward to form a stator limit shoulder, and the stator limit shoulder cooperates with the lower end surface of the motor stator.

[0015] Furthermore, the auxiliary bearing support includes a support seat and a center seat, the center seat is fixed at the middle position of the lower side of the support seat, the support seat is placed on the upper end of the tray, and the center hole of the center seat matches the cylindrical surface III.

[0016] A method for assembling a scroll compressor comprises the following steps: S1, place the auxiliary bearing support on the pallet, and insert the cylindrical surface III of the mandrel into the auxiliary bearing support; S2, the motor stator is mounted on the disk of the core shaft and matched with the cylindrical surface II, and the core shaft limits the motor stator through the motor stator limit shoulder; S3, shrink-fit the housing onto the outside of the motor stator, then fit the main bearing support onto the mandrel and match it with the cylindrical surface I, and the mandrel limits the main bearing support through the main bearing support limit stop shoulder; S4, respectively put in expansion sleeve II and expansion sleeve I, and make the inclined surface I fit with the inclined surface II, and the inclined surface III fit with the inclined surface IV; S5, tighten the bolts and weld the main bearing support and the auxiliary bearing support to the housing respectively; S6, remove the center seat from the support seat, pull out the core shaft and install the drive shaft into the compressor, and finally connect the movable scroll to the drive shaft.

[0017] After adopting the above technical solution, the present invention has the following advantages compared with the prior art: Under the action of expansion sleeves I and II, the main bearing support and the core shaft are guaranteed to be coaxial, while the core shaft and the auxiliary bearing support are coaxial, which ensures the coaxiality of the main bearing support and the auxiliary bearing support. The inclined surface IV cooperates with the inclined surface III to improve the matching accuracy between the cylindrical surface I and the expansion sleeve II, and the inclined surface II cooperates with the inclined surface I to improve the matching accuracy between the expansion sleeve I and the expansion sleeve II; and because the end face of the main bearing support and the core shaft are perpendicular to each other, the perpendicularity of the end face of the main bearing support and the drive shaft is also guaranteed.

[0018] The entire assembly process does not require the aid of auxiliary equipment, thus saving costs, and the assembly is simple and fast with high matching accuracy.

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 yes Figure 1 An internal cross-sectional view of Figure 3 It is a structural schematic diagram of the core shaft in the present invention; Figure 4 It is a structural schematic diagram of the expansion sleeve I in the present invention; Figure 5 It is a structural schematic diagram of the expansion sleeve II in the present invention.

[0021] In the figure, 1-bolt, 2-expansion sleeve I, 3-expansion sleeve II, 4-core shaft, 5-main bearing support, 6-motor stator, 7-housing, 8-auxiliary bearing support, 801-support seat, 802-center seat, 9-tray, 10-inclined surface I, 11-side groove I, 12-inclined surface II, 13-inclined surface III, 14-matching ring, 15-side groove II, 16-cylindrical surface I, 17-inclined surface IV, 18-cylindrical surface II, 19-cylindrical surface III, 20-statator limit stop shoulder, 21-main bearing support limit stop shoulder. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0023] like Figure 1-5 As shown, the present invention provides a tooling and assembly method for a scroll compressor, comprising an expansion sleeve II3, an expansion sleeve I2 and a core shaft 4, wherein the core shaft 4 comprises a cylindrical surface I16 arranged at the upper end and a cylindrical surface III19 arranged at the lower end, a main bearing support 5 cooperates with the cylindrical surface I16 of the core shaft 4, and a secondary bearing support 8 cooperates with the cylindrical surface III19 of the core shaft 4; An expansion sleeve II 3 is sleeved on the outer side of the cylindrical surface I 16, the inner wall of the expansion sleeve II 3 matches with the outer wall of the cylindrical surface I 16, and the lower end of the outer wall of the expansion sleeve II 3 matches with the inner wall of the lower end of the mounting hole of the main bearing support 5; The expansion sleeve I2 is sleeved on the upper end of the expansion sleeve II3, the inner wall of the expansion sleeve II3 matches with the upper end of the outer wall of the expansion sleeve II3, and the outer wall of the expansion sleeve I2 matches with the inner wall of the upper end of the mounting hole of the main bearing support 5.

[0024] The cylindrical surface Ⅰ16 of the core shaft 4 is coaxially arranged with the expansion sleeve Ⅱ3, the expansion sleeve Ⅱ3 is coaxially arranged with the expansion sleeve Ⅰ2, and the lower end of the mounting hole of the main bearing support 5 cooperates with the expansion sleeve Ⅱ3, and the upper end of the mounting hole of the main bearing support 5 cooperates with the expansion sleeve Ⅰ2, thereby ensuring that the core shaft 4 and the main bearing support 5 are coaxially arranged. At the same time, the secondary bearing support 8 cooperates with the cylindrical surface Ⅲ19 of the core shaft 4, so that the secondary bearing support 8 is coaxial with the core shaft 4, thereby ensuring that the main bearing support 5 and the secondary bearing support 8 are coaxial.

[0025] Furthermore, a slope IV17 is provided at the lower end of the cylindrical surface I16, and a slope III13 is provided at the lower end of the inner wall of the expansion sleeve II3. The slope IV17 cooperates with the slope III13 to improve the matching accuracy between the cylindrical surface I16 and the expansion sleeve II3.

[0026] Furthermore, an inclined surface II12 is provided at the upper end of the outer wall of the expansion sleeve II3, and an inclined surface I10 is provided at the inner wall of the expansion sleeve I2. The inclined surface II12 cooperates with the inclined surface I10 to improve the cooperation accuracy between the expansion sleeve I2 and the expansion sleeve II3.

[0027] The lower end of the outer wall of the expansion sleeve Ⅰ2 extends outward to form a matching ring 14, and the outer end of the matching ring 14 matches with the upper end of the mounting hole of the main bearing support 5; the upper end of the expansion sleeve Ⅰ2 is a sealing plate with a bolt hole, and a bolt 1 is provided at the bolt hole. The bolt 1 is installed on the upper end of the cylindrical surface Ⅰ16 of the core shaft 4, so that the expansion sleeve Ⅱ3 and the expansion sleeve Ⅰ2 are firmly fixed on the core shaft 4, thereby further improving the matching accuracy.

[0028] A plurality of side grooves Ⅰ11 are provided on the side wall of the expansion sleeve Ⅰ2 along its axial direction, and a plurality of side grooves Ⅱ15 are provided on the side wall of the expansion sleeve Ⅱ3 along its axial direction, so that the fit between the surfaces is tighter.

[0029] A main bearing support limit stop shoulder 21 is provided at the lower end of the cylindrical surface Ⅰ16 of the core shaft 4, so that the lower end surface of the main bearing support 5 is close to the main bearing support limit stop shoulder 21, thereby ensuring the verticality of the main bearing support 5 and the core shaft 4, and at the same time ensuring the axial position of the main bearing support 5.

[0030] The middle section of the core shaft 4 is provided with two discs, and the side walls of the two discs form a cylindrical surface II18, which matches the inner wall of the inner hole of the motor stator 6. Thus, the motor stator 6 is positioned so that the motor stator 6 and the core shaft 4 are coaxial.

[0031] The lower side of the lower disc protrudes outward to form a stator limit shoulder 20, which cooperates with the lower end surface of the motor stator 6 to ensure the verticality of the motor stator 6 and the core shaft 4, while ensuring the axial position of the motor stator 6.

[0032] The secondary bearing support 8 includes a support seat 801 and a center seat 802. The center seat 802 is fixed at the middle position of the lower side of the support seat 801. The support seat 801 is placed on the upper end of the tray 9. The center hole of the center seat 802 matches the cylindrical surface III19.

[0033] The outer sides of the expansion sleeve II3, the expansion sleeve I2 and the core shaft 4 are covered with a housing 7.

[0034] Under the action of the expansion sleeve Ⅰ2 and the expansion sleeve Ⅱ3, the main bearing support 5 is guaranteed to be coaxial with the core shaft 4, and the core shaft 4 is coaxial with the auxiliary bearing support 8, which ensures that the main bearing support 5 is coaxial with the auxiliary bearing support 8, and the inclined surface Ⅳ17 cooperates with the inclined surface Ⅲ13 to improve the matching accuracy between the cylindrical surface Ⅰ16 and the expansion sleeve Ⅱ3, and the inclined surface Ⅱ12 cooperates with the inclined surface Ⅰ10 to improve the matching accuracy between the expansion sleeve Ⅰ2 and the expansion sleeve Ⅱ3; and because the end face of the main bearing support 5 and the core shaft 4 are perpendicular to each other, the perpendicularity of the end face of the main bearing support and the drive shaft is also guaranteed.

[0035] The present invention also provides a method for assembling a scroll compressor, comprising the following steps: S1, placing the auxiliary bearing support 8 on the tray 9, and inserting the cylindrical surface III19 of the mandrel 4 into the auxiliary bearing support 8; S2, the motor stator 6 is mounted on the disk of the core shaft 4 and matched with the cylindrical surface II 18, and the core shaft 4 limits the motor stator 6 through the motor stator limit shoulder 20; S3, shrink-fit the housing 7 onto the outside of the motor stator 6, then fit the main bearing support 5 onto the mandrel 4 and match it with the cylindrical surface I 16, and the mandrel 4 limits the main bearing support 8 through the main bearing support limit stop shoulder 21; S4, respectively put in the expansion sleeve II3 and the expansion sleeve I2, and make the inclined surface I10 fit with the inclined surface II12, and the inclined surface III13 fit with the inclined surface IV17; S5, tighten the bolt 1 and then weld the main bearing support 5 and the auxiliary bearing support 8 to the housing 7; S6, remove the center seat 802 from the support seat 801, pull out the core shaft 4, install the drive shaft into the compressor, and finally connect the movable scroll to the drive shaft.

[0036] The entire assembly process does not require the aid of auxiliary equipment, thus saving costs, and the assembly is simple and fast with high matching accuracy.

[0037] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A tool for assembling a scroll compressor, characterized in that: The invention comprises an expansion sleeve II (3), an expansion sleeve I (2) and a core shaft (4), wherein the core shaft (4) comprises a cylindrical surface I (16) arranged at the upper end and a cylindrical surface III (19) arranged at the lower end, a main bearing support (5) cooperates with the cylindrical surface I (16) of the core shaft (4), and a secondary bearing support (8) cooperates with the cylindrical surface III (19) of the core shaft (4); An expansion sleeve II (3) is sleeved on the outer side of the cylindrical surface I (16), the inner wall of the expansion sleeve II (3) matches the outer wall of the cylindrical surface I (16), and the lower end of the outer wall of the expansion sleeve II (3) matches the inner wall of the lower end of the mounting hole of the main bearing support (5); The expansion sleeve I (2) is mounted on the upper end of the expansion sleeve II (3), the inner wall of the expansion sleeve II (3) matches with the upper end of the outer wall of the expansion sleeve II (3), and the outer wall of the expansion sleeve I (2) matches with the inner wall of the upper end of the mounting hole of the main bearing support (5).

2. A scroll compressor assembly tool as claimed in claim 1, characterized in that: The lower end of the cylindrical surface I (16) is provided with an inclined surface IV (17), and the lower end of the inner wall of the expansion sleeve II (3) is provided with an inclined surface III (13), and the inclined surface IV (17) and the inclined surface III (13) cooperate with each other.

3. A scroll compressor assembly tool as claimed in claim 2, characterized in that: The upper end of the outer wall of the expansion sleeve II (3) is provided with an inclined surface II (12), and the inner wall of the expansion sleeve I (2) is provided with an inclined surface I (10), and the inclined surface II (12) and the inclined surface I (10) cooperate with each other.

4. The scroll compressor assembly tool according to claim 1, characterized in that: The lower end of the outer wall of the expansion sleeve I (2) extends outward to form a matching ring (14), and the outer end of the matching ring (14) matches with the upper end of the mounting hole of the main bearing support (5); the upper end of the expansion sleeve I (2) is a sealing plate with a bolt hole, and a bolt (1) is provided at the bolt hole, and the bolt (1) is installed on the upper end of the cylindrical surface I (16) of the core shaft (4).

5. The scroll compressor assembly tool according to claim 3, characterized in that: A plurality of side grooves I (11) are arranged on the side wall of the expansion sleeve I (2) along its axial direction, and a plurality of side grooves II (15) are arranged on the side wall of the expansion sleeve II (3) along its axial direction.

6. The scroll compressor assembly tool according to claim 1, characterized in that: A main bearing support limiting shoulder (21) is provided at the lower end of the cylindrical surface I (16) of the core shaft (4), so that the lower end surface of the main bearing support (5) is closely against the main bearing support limiting shoulder (21).

7. The scroll compressor assembly tool according to claim 1, characterized in that: The middle section of the core shaft (4) is provided with two discs, the side walls of the two discs form a cylindrical surface II (18), and the cylindrical surface II (18) matches the inner wall of the inner hole of the motor stator (6).

8. The scroll compressor assembly tool according to claim 7, characterized in that: The lower side of the lower disc protrudes outward to form a stator limit stop shoulder (20), and the stator limit stop shoulder (20) cooperates with the lower end surface of the motor stator (6).

9. The scroll compressor assembly tool according to claim 1, characterized in that: The auxiliary bearing support (8) includes a support seat (801) and a center seat (802), wherein the center seat (802) is fixed at the middle position of the lower side of the support seat (801), the support seat (801) is placed on the upper end of the tray (9), and the center hole of the center seat (802) matches the cylindrical surface III (19).

10. A method for assembling a scroll compressor, characterized in that: The following steps are included: S1, placing the auxiliary bearing support (8) on the tray (9), and inserting the cylindrical surface III (19) of the mandrel (4) into the auxiliary bearing support (8); S2, the motor stator (6) is mounted on the disk of the core shaft (4) and matched with the cylindrical surface II (18), and the core shaft (4) limits the motor stator (6) through the motor stator limit stop shoulder (20); S3, shrink-fitting the housing (7) onto the outer side of the motor stator (6), then fitting the main bearing support (5) onto the core shaft (4) and matching it with the cylindrical surface I (16), and the core shaft (4) limits the main bearing support (8) through the main bearing support limit stop shoulder (21); S4, respectively insert the expansion sleeve II (3) and the expansion sleeve I (2), and make the inclined surface I (10) fit with the inclined surface II (12), and the inclined surface III (13) fit with the inclined surface IV (17); S5, after tightening the bolts (1), the main bearing support (5) and the auxiliary bearing support (8) are welded and fixed to the housing (7); S6, remove the center seat (802) from the support seat (801), extract the core shaft (4), install the drive shaft into the compressor, and finally connect the movable scroll to the drive shaft.

Images