Manual Cylinder Alignment Tooling for Rotary Compressor and Its Alignment Method

Abstract

The present invention discloses a manual centering tooling for a rotor compressor cylinder and its centering method, including a workbench for placing the assembled cylinder and the upper cylinder head, and a mandrel replacing the crankshaft and the piston is detachably sleeved in the cylinder and the upper cylinder head; a limiting hole is provided in the middle of the workbench for connecting the mandrel; a guiding and limiting block is further provided above the workbench, and an adjustable handle is arranged in the guiding and limiting block, and the end of the handle is used for abutting against the cylinder, and the axis of the handle is perpendicular to the axis of the cylinder. The manual centering tooling for the rotor compressor cylinder has a simple structure and is easy to use, and can be used for the centering operation of the rotor compressor cylinder. In particular, it can replace the centering machine equipment for manual cylinder centering and assembly, and is suitable for the small amount of assembly requirements in the product R & D stage or the situation where the centering machine equipment cannot be used.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor assembly, and more particularly to a manual centering tooling for the cylinder of a rotary compressor and a centering method therefor. Background Art

[0002] During the assembly process of the cylinder, cylinder head, crankshaft and piston of a rotary compressor, centering operations are required, and usually, the centering work is completed by a centering machine.

[0003] For example, the cylinder centering machine equipment automatically adjusts the exhaust side clearance and assembles and fastens it. The principle is as follows:

[0004] (1) Measurement of Amax: As shown in the attached instructions, place the crankshaft and piston assembly in the Amax measurement table, measure the value of A = |A1 - A2|, and drive the crankshaft to rotate to obtain the maximum value of A (i.e., Amax). Figure 1 As shown, place the crankshaft and piston assembly in the Amax measurement table, measure the value of A = |A1 - A2|, and drive the crankshaft to rotate to obtain the maximum value of A (i.e., Amax).

[0005] (2) Cylinder centering: As shown in the attached instructions, the equipment measures the values of B, X1, and X2, and adjusts the relative position between the upper cylinder head and the cylinder through the servo mechanism in the X - Y direction, that is, adjusts the sizes of B, X1, and X2, so that the eccentric clearance (B - Amax) and the left - right clearance (X1 - X2) meet the set requirements. When the eccentric adjustment is completed, the equipment locks the centering mechanism and tightens the bolts. Figure 2 As shown, the equipment measures the values of B, X1, and X2, and adjusts the relative position between the upper cylinder head and the cylinder through the servo mechanism in the X - Y direction, that is, adjusts the sizes of B, X1, and X2, so that the eccentric clearance (B - Amax) and the left - right clearance (X1 - X2) meet the set requirements. When the eccentric adjustment is completed, the equipment locks the centering mechanism and tightens the bolts.

[0006] The above - mentioned automatic centering operation through the centering machine equipment is very convenient, but it cannot be operated when the equipment fails and needs to wait until the equipment is repaired before use; in addition, during the R & D process, there are a small number of cylinders of different models that need to be centered. If multiple sets of automatic centering machine toolings are specially made or purchased for this purpose, the cost is relatively high, which is not conducive to reducing the R & D cost. Summary of the Invention

[0007] The object of the present invention is to provide a manual centering tooling for the cylinder of a rotary compressor and a centering method therefor in view of the problems existing in the prior art.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A manual centering tooling for the cylinder of a rotary compressor includes a workbench for placing the cylinder and the upper cylinder head to be assembled. A mandrel replacing the crankshaft and piston is detachably sleeved in the cylinder and the upper cylinder head. A limiting hole is provided in the middle of the workbench for connecting the mandrel. A guiding and limiting block is further provided above the workbench. An adjustable handle is provided in the guiding and limiting block, and the end of the handle is used to abut against the cylinder, and the axis of the handle is perpendicular to the axis of the cylinder.

[0010] This manual centering tooling for the rotor compressor has a simple structure and is easy to use. It can be used for the centering operation of the cylinder of the rotor compressor. In particular, it can replace the centering machine equipment for manual cylinder centering and assembly, and is suitable for a small number of assembly requirements in the product R & D stage or the situation where the centering machine equipment cannot be used, filling the gap in this regard.

[0011] This manual centering tooling for the rotor compressor uses the mandrel to replace the crankshaft and piston to adjust the exhaust side clearance, and has the following advantages: 1. There is no need to assemble the crankshaft and piston into the cylinder for adjustment, which simplifies the adjustment structure and method and is suitable for the debugging work in the R & D and test stages; 2. The stability of the mandrel is relatively high, which can reduce the adverse effects brought by its own assembly errors, and only by pressing can the assembly clearance between the upper cylinder head and the cylinder be adjusted; 3. The allowable range of the exhaust side clearance has been considered in the mandrel, and the centering can be completed after pressing, without real-time measurement of data.

[0012] When manufacturing the mandrel, it is divided into grades according to the tolerance range of the crankshaft eccentricity and the piston outer diameter, and a set of mandrels is made according to the diameter D. In actual application, a mandrel with a suitable diameter D is selected according to the measured crankshaft eccentricity and the group of the measured piston outer diameter for assembly and debugging.

[0013] The settings of the workbench and the handle are relatively simple, easy to manufacture and assemble. Gently tighten the handle so that the end of the handle is close to the outer circle of the cylinder, which can eliminate the clearance between the inner diameter of the exhaust side of the cylinder and the outer diameter of the mandrel, so as to ensure the exhaust side clearance.

[0014] The setting of the limit hole can fix the mandrel. In this way, when the cylinder is extruded, the cylinder can move relative to the mandrel, and the upper cylinder head is connected in cooperation with the mandrel, so the upper cylinder head will also move relative to the cylinder. When the centering is completed, the upper cylinder head and the cylinder in this state can be fixed by screws to maintain the eccentric clearance of the crankshaft.

[0015] Furthermore, the mandrel includes an integrally formed upper cylinder head mating part, a cylinder mating part and a limit connection part. The upper cylinder head mating part is in fit with the shaft hole of the upper cylinder head and extends upward. The limit connection part is sleeved in the limit hole and extends downward. The cylinder mating part is in fit with the cylinder hole in the middle of the cylinder. The upper cylinder head mating part, the cylinder mating part and the limit connection part are arranged on the same central axis.

[0016] Furthermore, let the maximum outer diameter of the cylinder mating part of the mandrel, that is, the maximum outer diameter of the mandrel be D, the eccentricity of the crankshaft be a, the radius of the piston be r, and the exhaust side clearance of the crankshaft in the cylinder be b, then D = 2 * (a + r + b), and the unit is mm.

[0017] According to the tolerance ranges of the crankshaft eccentricity and the piston outer diameter, several grades of mandrel diameters D are set, and in actual application, a mandrel with a suitable diameter D is selected according to the measured crankshaft eccentricity and the group of the measured piston outer diameter.

[0018] Through such a setting, when assembling, the end of the handle is made to closely adhere to the outer circle of the exhaust side of the cylinder to eliminate the gap between the inner hole of the exhaust side of the cylinder and the outer diameter of the mandrel, thereby obtaining the designed exhaust side gap b.

[0019] Furthermore, the axial height of the cylinder fitting part does not exceed the axial height of the cylinder hole, so that the upper end face of the cylinder fitting part does not directly contact the lower end face of the upper cylinder head; the cylinder fitting part includes a cylindrical part in the middle and upper and lower truncated conical column parts, and the setting with reduced sizes at both ends reduces the design of the mating surface and facilitates the separation of the cylinder upper cylinder head assembly and the mandrel after assembly.

[0020] Furthermore, the upper cylinder head fitting part includes a socket fitting part and an upper rod part located above the socket fitting part. A flat groove is provided above the upper rod part, and the diameter of the upper rod part is smaller than the diameter of the socket fitting part; the limit connection part includes a limit socket part and a lower rod part located below the limit socket part, and the diameter of the lower rod part is smaller than the diameter of the limit socket part, reducing the design of the mating surface and facilitating the separation of the cylinder upper cylinder head assembly and the mandrel after assembly.

[0021] The flat groove is provided on the part of the upper rod part protruding from the upper cylinder head, which is convenient for using wrench-like tools to clamp or adjust the mandrel.

[0022] Furthermore, the guiding and limiting block is vertically arranged at the edge of the workbench, the handle rod horizontally passes through the guiding and limiting block, and the pressing head abuts against the outer wall of the cylinder.

[0023] Furthermore, a protective pad is sleeved on the pressing head, which can prevent the outer periphery of the cylinder from being damaged by rigid extrusion.

[0024] A manual centering method for a rotary compressor cylinder, the centering method includes the following steps:

[0025] (1) Select a mandrel with a suitable diameter D according to the measured crankshaft eccentricity and the piston outer diameter grade, sleeved the limit connection part of the mandrel in the middle limit hole of the workbench, ensure that the mandrel is vertically arranged, and the lower end face of the cylinder fitting part of the mandrel horizontally abuts against the workbench;

[0026] (2) Assemble the cylinder and the upper cylinder head, insert the screws but do not tighten them;

[0027] (3) Fit the assembled cylinder and the upper cylinder head onto the mandrel from above, with the exhaust side of the cylinder facing the handle. The mandrel is respectively fitted with the shaft hole of the upper cylinder head and the cylinder hole of the cylinder.

[0028] (4) Gently tighten the handle so that the end of the handle presses against the outer circumference of the cylinder to eliminate the clearance between the inner hole on the exhaust side of the cylinder and the outer diameter of the mandrel. Gradually tighten the screws connecting the upper cylinder head and the cylinder to complete the centering operation of the cylinder.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The manual cylinder centering tooling for the rotor compressor of the present invention has a simple structure and is easy to use. It can be used for the centering operation of the cylinder of the rotor compressor, especially for manual cylinder centering and assembly instead of using a centering machine, and is suitable for a small number of assembly requirements in the product R & D stage or situations where a centering machine cannot be used; 2. The manual cylinder centering tooling for the rotor compressor of the present invention uses the mandrel to replace the crankshaft and piston to adjust the clearance on the exhaust side, without assembling the crankshaft and piston into the cylinder for adjustment, which simplifies the adjustment structure and method and is suitable for the debugging work in the R & D and test stages; Before assembly, the eccentricity of the crankshaft and the outer diameter of the piston are graded, and the mandrel is selected according to the grade, which can achieve the accuracy of equipment assembly; The mandrel has already taken into account the allowable range of the clearance on the exhaust side, and the centering can be completed after pressing, without real-time measurement of data; 3. The settings of the workbench, the guiding and limiting blocks and the handle are relatively simple, easy to manufacture and assemble, without setting auxiliary clamping mechanisms and measuring mechanisms; 4. The setting of the limiting hole can fix the mandrel. In this way, when the cylinder is extruded, the cylinder can move relative to the mandrel, and the upper cylinder head is connected in cooperation with the mandrel, so the upper cylinder head will also move relative to the cylinder to complete the centering. Description of the Drawings

[0030] Figure 1 Schematic diagram of piston and crankshaft adjustment in the prior art;

[0031] Figure 2 Schematic diagram of cylinder centering in the prior art;

[0032] Figure 3 Overall layout schematic diagram of the manual cylinder centering tooling for the rotor compressor of the present invention;

[0033] Figure 4 Cross-sectional structure schematic diagram of the manual cylinder centering tooling for the rotor compressor of the present invention;

[0034] Figure 5 Schematic diagram of the mandrel structure of the manual cylinder centering tooling for the rotor compressor of the present invention;

[0035] Figure 6Schematic diagram of the principle of the mandrel of the present invention replacing the crankshaft and the piston Figure 1 ;

[0036] Figure 7 Schematic diagram of the principle of the mandrel of the present invention replacing the crankshaft and the piston Figure 2 ;

[0037] Figure 8 Schematic diagram of the handle arrangement of the manual cylinder alignment tooling for the rotary compressor of the present invention;

[0038] In the figure: 1, workbench; 2, cylinder; 3, upper cylinder head; 4, mandrel; 401, cylinder mating part; 4011, cylindrical part; 4012, truncated conical column part; 402, upper cylinder head mating part; 4021, socket mating part; 4022, upper rod body part; 4023, flat groove; 403, limit connection part; 4031, limit socket part; 4032, lower rod body part; 5, guide limit block; 6, handle; 601, handle rod body; 602, pressing head; 603, adjusting disc; 7, limit hole; 8, support foot; 9, crankshaft; 10, piston; 11, protective pad. Detailed implementation manners

[0039] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] Embodiment 1:

[0042] As Figure 3 and Figure 4As shown in the figure, a manual centering tooling for the cylinder of a rotary compressor includes a workbench 1, which is used to place the cylinder 2 and the upper cylinder head 3 to be assembled. A mandrel 4 that replaces the crankshaft and the piston is detachably sleeved in the cylinder 2 and the upper cylinder head 3. A limiting hole 7 is provided in the middle of the workbench 1, and the limiting hole 7 is used to connect the mandrel 4. A guiding and limiting block 5 is further provided above the workbench 1. A handle 6 is connected by a thread in the guiding and limiting block 5. The end of the handle 6 is used to abut against the cylinder 2, and the axis of the handle 6 is perpendicular to the axis of the cylinder 2.

[0043] The manual centering tooling for the cylinder of this rotary compressor has a simple structure and is easy to use. It can be used for the centering operation of the cylinder of the rotary compressor. In particular, it can replace the centering machine equipment for manual cylinder centering and assembly. It is suitable for the small amount of assembly requirements in the product R & D stage or the situation where the centering machine equipment cannot be used, filling the gap in this aspect.

[0044] The manual centering tooling for the cylinder of this rotary compressor uses the mandrel 4 to replace the crankshaft and the piston to adjust the exhaust side clearance. There is no need to assemble the crankshaft and the piston into the cylinder for adjustment, which simplifies the adjustment structure and method and is suitable for the debugging work in the R & D and test stages. The allowable range of the exhaust side clearance has been taken into account in the mandrel 4. After being pressed, the centering can be completed without real-time measurement of data, making the centering process simpler and faster.

[0045] When manufacturing the mandrel 4, a series of mandrels 4 are manufactured according to different grades of the crankshaft. Different models of cylinders can select different grades of mandrels 4 for assembly and debugging.

[0046] The settings of the workbench 1, the guiding and limiting block 5 and the handle 6 are relatively simple, easy to manufacture and assemble, and there is no need to set up auxiliary clamping mechanisms and measuring mechanisms. The setting of the guiding and limiting block 5 is convenient for the handle 6 to horizontally apply pressure to the cylinder 2, so as to adjust the fitting clearance between the inner peripheral wall of the cylinder 2 and the outer periphery of the mandrel 4.

[0047] The setting of the limiting hole 7 can fix the mandrel 4. In this way, when the cylinder 2 is extruded, the cylinder 2 can move relative to the mandrel 4. The upper cylinder head 3 is connected in cooperation with the mandrel 4, so the upper cylinder head 3 will also move relative to the cylinder 2. When the centering is completed, the upper cylinder head and the cylinder in this state can be fixed by screws to maintain the eccentric clearance of the crankshaft.

[0048] Further, the mandrel 4 includes an integrally formed upper cylinder head mating portion 402, a cylinder mating portion 401, and a limit connection portion 403. The upper cylinder head mating portion 402 is sleeved in the upper cylinder head 3 and extends upward. The limit connection portion 403 is sleeved in the limit hole 7 and extends downward. The cylinder mating portion 401 is located in the cylinder hole in the middle of the cylinder 2. The upper cylinder head mating portion 402, the cylinder mating portion 401, and the limit connection portion 403 are arranged on the same central axis.

[0049] Further, as shown in Figure 5 The axial height of the cylinder mating portion 401 does not exceed the axial height of the cylinder hole, so that the upper end face of the cylinder mating portion 401 does not directly contact the lower end face of the upper cylinder head 3. The cylinder mating portion 401 includes a cylindrical portion 4011 in the middle and truncated conical column portions 4012 at the upper and lower ends. The reduced sizes at both ends facilitate the connection and separation of the cylinder mating portion 401 and the cylinder 2.

[0050] Further, the upper cylinder head mating portion 402 includes a socket mating portion 4021 and an upper rod portion 4022 located above the socket mating portion 4021. A flat groove 4023 is provided above the upper rod portion 4022. The diameter of the upper rod portion 4022 is smaller than the diameter of the socket mating portion 4021. The limit connection portion 403 includes a limit socket portion 4031 and a lower rod portion 4032 located below the limit socket portion 4031. The diameter of the lower rod portion 4032 is smaller than the diameter of the limit socket portion 4031.

[0051] The flat groove 4023 is provided on the part of the upper rod portion 4022 that extends out of the upper cylinder head, which is convenient for using tools to clamp or adjust the mandrel 4.

[0052] Further, as shown in Figure 6 and Figure 7 The maximum outer diameter of the cylinder mating portion 401, that is, the maximum outer diameter of the mandrel 4, is the outer diameter of the cylindrical portion 4011, denoted as D. The eccentricity of the crankshaft 9 is a, the radius of the piston 10 is r, and the exhaust side clearance of the crankshaft 9 in the cylinder 2 is b. Then D = 2 * (a + r + b), and the unit is mm for all.

[0053] Through such a setting, the maximum outer diameter of the mandrel 4 can cover the eccentricity of the crankshaft 9, the size of the piston 10, and the size of the exhaust side clearance, enabling it to complete centering through a close-fitting method.

[0054] Further, as shown in Figure 8As shown in the figure, the guiding and limiting block 5 is vertically arranged at the edge of the workbench 1. The handle 6 includes a handle rod body 601, and pressing heads 602 and adjusting discs 603 are respectively arranged at both ends of the handle rod body 601. The handle rod body 601 horizontally passes through the guiding and limiting block 5 and is screwed in by threads, and the pressing head 602 abuts against the outer wall of the air cylinder 2.

[0055] By pressing the adjusting disc 603, the handle rod body 601 can move horizontally forward, so that the pressing head 602 abuts against and presses the air cylinder 2, so that the inner wall of the air cylinder 2 closely fits the outer circumference of the mandrel 4.

[0056] Furthermore, a protective pad 11 is sleeved on the pressing head 602, and the anti-slip pad 11 can prevent damage to the outer circumference of the air cylinder caused by rigid extrusion.

[0057] Furthermore, the guiding and limiting block 5 is fixed on the workbench 1 by bolts, and a plurality of supporting feet 8 are detachably arranged below the workbench 1.

[0058] A manual centering method for a rotor compressor cylinder, the centering method includes the following steps:

[0059] (1) The limiting connection part 403 of the mandrel 4 is sleeved in the middle limiting hole 7 of the workbench 1 to ensure that the mandrel 4 is vertically arranged, and the lower end surface of the cylinder matching part 401 of the mandrel 4 horizontally abuts on the workbench 1;

[0060] (2) Assemble the air cylinder 2 and the upper cylinder head 3, and insert screws into the pump body but do not tighten them;

[0061] (3) The assembled air cylinder 2 and the upper cylinder head 3 are sleeved on the mandrel 4 from above, with the exhaust side of the air cylinder facing the handle, and the mandrel 4 respectively cooperates with the shaft hole of the upper cylinder head 3 and the cylinder hole of the air cylinder 2;

[0062] (4) Gently tighten the handle 6 so that the end of the handle 6 closely adheres to the outer circle of the air cylinder 2 to eliminate the gap between the inner hole on the exhaust side of the air cylinder and the outer diameter of the mandrel 4, and gradually tighten the screws connecting the upper cylinder head 3 and the air cylinder 2 to complete the centering operation of the air cylinder.

[0063] Adopting this manual centering method, the operation is simple. Under the small assembly requirements in the product R & D stage, this method can be used for assembly tests, and the centering operation of the air cylinder product can also be carried out when the centering machine fails.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Manual centering tooling for the cylinder of a rotary compressor, characterized in that It includes a workbench which is used to place the cylinder and the upper cylinder head to be assembled. A mandrel replacing the crankshaft and the piston is detachably sleeved in the cylinder and the upper cylinder head. A limiting hole is provided in the middle of the workbench, and the limiting hole is used to connect the mandrel. A guiding and limiting block is further provided above the workbench. An adjustable handle is arranged in the guiding and limiting block, and the end of the handle is used to abut against the cylinder. The axis of the handle is vertically arranged with respect to the axis of the cylinder. The mandrel includes an integrally formed upper cylinder head mating part, a cylinder mating part and a limiting connection part. The upper cylinder head mating part is in fit with the shaft hole of the upper cylinder head and extends upward. The limiting connection part is sleeved in the limiting hole and extends downward. The cylinder mating part is in fit with the cylinder hole in the middle of the cylinder. The upper cylinder head mating part, the cylinder mating part and the limiting connection part are arranged on the same central axis.

2. The manual centering tooling for the rotor compressor cylinder according to claim 1, characterized in that, Let the maximum outer diameter of the cylinder mating part of the mandrel be D, the eccentricity of the crankshaft be a, the radius of the piston be r, and the exhaust side clearance of the crankshaft in the cylinder be b. Then D = 2 * (a + r + b), and the unit is mm for all.

3. The manual cylinder alignment tooling for a rotary compressor according to claim 1, wherein The axial height of the cylinder mating part does not exceed the axial height of the cylinder hole. The cylinder mating part includes a cylindrical part in the middle and upper and lower frustum-shaped column parts.

4. The manual centering tooling for the rotor compressor cylinder according to claim 1, characterized in that, The upper cylinder head mating part includes a socket fit part and an upper rod part located above the socket fit part. A flat groove is provided above the upper rod part. The diameter of the upper rod part is smaller than that of the socket fit part. The limiting connection part includes a limiting socket part and a lower rod part located below the limiting socket part. The diameter of the lower rod part is smaller than that of the limiting socket part.

5. The manual cylinder alignment tooling for a rotary compressor according to claim 1, wherein The guiding and limiting block is vertically arranged at the edge of the workbench. The handle includes a handle rod body. A pressing head and an adjusting disc are respectively arranged at both ends of the handle rod body. The handle rod body horizontally passes through the guiding and limiting block, and the pressing head abuts against the outer wall of the cylinder.

6. The manual centering tooling for the rotor compressor cylinder according to claim 5, wherein A protective pad is sleeved on the pressing head.

7. A centering method for a centering tool for a hand-operated cylinder of a rotary compressor as described in any one of claims 1 to 6, characterized in that, The centering method includes the following steps: (1) Select a mandrel with a suitable diameter D according to the measured eccentricity of the crankshaft and the piston outer diameter gear. Sleeve the limiting connection part of the mandrel in the middle limiting hole of the workbench to ensure that the mandrel is vertically arranged, and the lower end face of the cylinder mating part of the mandrel horizontally abuts against the workbench. (2) Assemble the cylinder and the upper cylinder head, insert the screws but do not tighten them. (3) Sleeve the assembled cylinder and upper cylinder head onto the mandrel from above. The exhaust side of the cylinder faces the handle. The mandrel is respectively in fit with the shaft hole of the upper cylinder head and the cylinder hole of the cylinder. (4) Gently tighten the handle to make the end of the handle tightly fit against the outer circle of the cylinder to eliminate the clearance between the inner hole on the exhaust side of the cylinder and the outer diameter of the mandrel. Gradually tighten the screws connecting the upper cylinder head and the cylinder to complete the centering operation of the cylinder.

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