CN111069849B

CN111069849B - Cylinder block manufacturing method, cylinder block and compressor

Info

Publication number: CN111069849B
Application number: CN201911184262.7A
Authority: CN
Inventors: 胡余生; 马梓净; 高明世; 张凯
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-06-29
Anticipated expiration: 2039-11-27
Also published as: CN111069849A

Abstract

The invention provides a cylinder block manufacturing method, a cylinder block and a compressor. The cylinder block comprises a cylinder block body and a support integrally formed with the cylinder block body, wherein the support is used for supporting the shaft end of a crankshaft of a compressor, and the cylinder block manufacturing method comprises the following steps: a blank forming step, namely integrally forming a cylinder seat blank, wherein the cylinder seat blank comprises a cylinder seat body blank and a support blank; and a shaft hole processing step, namely processing a first shaft hole in the support blank and a second shaft hole in the cylinder block body blank, wherein the first shaft hole and the second shaft hole are processed in the same machining procedure. According to the cylinder seat manufacturing method, the cylinder seat and the compressor, after the cylinder seat blank is integrally formed, the first shaft hole and the second shaft hole are integrally processed on the blank, and the first shaft hole and the second shaft hole are processed in one machining process, so that the coaxiality of the first shaft hole and the second shaft hole is guaranteed.

Description

Cylinder block manufacturing method, cylinder block and compressor

Technical Field

The invention belongs to the technical field of compressors, and particularly relates to a cylinder block manufacturing method, a cylinder block and a compressor.

Background

In the operation process of the piston compressor, the motor drives the crankshaft to do rotary motion, the rotary motion is converted into piston motion through a connecting rod, a piston and other components, and gas is compressed in the cylinder to do work; the pressure generated by gas compression and the inertia force generated by the motion of the crankshaft and the connecting rod are transmitted to the short shaft of the crankshaft, and the crankshaft is supported by the cylinder block. The conventional compressor reduces the friction loss between the crankshaft and the cylinder seat caused by unbalanced force by lengthening the matching distance between the crankshaft and the cylinder seat and arranging the counter bore on the rotor, and the solution introduces a contradiction, namely the contradiction between performance, cost and reliability. Under the condition that the matching distance is lengthened, the height of the whole compressor is inevitably increased if the rotor counter bore is not formed, so that the cost of the whole compressor is increased; in addition, along with the development of compressors, the small size and the light weight gradually become a trend, the interference section is reduced by arranging the counter bore on the light and thin motor rotor, potential safety hazards exist, or the rotor is small in appearance and compact in structure, so that no space for arranging the counter bore exists. In order to overcome the defects caused by the overlong shaft length of the crankshaft, the method is realized by arranging a corresponding supporting component at the end head of the free end of the crankshaft for supporting in the prior art, but most of the existing supporting components are assembled with a cylinder seat after being manufactured independently, so that the coaxiality of a shaft hole on the cylinder seat and the shaft hole on the supporting component cannot be ensured due to processing errors and assembly errors, and the friction loss of the crankshaft is still serious.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide a cylinder block manufacturing method, a cylinder block and a compressor, wherein after a cylinder block blank is integrally formed, a first shaft hole and a second shaft hole are integrally formed on the blank, and the first shaft hole and the second shaft hole are machined in one machining process, so that the coaxiality of the first shaft hole and the second shaft hole is ensured.

In order to solve the above problems, the present invention provides a method for manufacturing a cylinder block, wherein the cylinder block comprises a cylinder block body and a bracket integrally formed with the cylinder block body, and the bracket is used for supporting a shaft end of a crankshaft of a compressor, comprising the following steps:

a blank forming step, namely integrally forming a cylinder seat blank, wherein the cylinder seat blank comprises a cylinder seat body blank and a support blank;

and a shaft hole processing step, namely processing a first shaft hole in the support blank and a second shaft hole in the cylinder block body blank, wherein the first shaft hole and the second shaft hole are processed in the same machining procedure.

Preferably, the cylinder block body blank and the bracket blank are connected through a connecting rod, and after the shaft hole machining step, the cylinder block body blank further comprises:

a connecting hole tapping step of drilling and tapping along the extending direction of the connecting rod to form a connecting hole;

and a breakable groove processing step of cutting a breakable groove on the connecting rod in a direction perpendicular to the tapping direction to divide the connecting rod into a first rod segment and a second rod segment which are virtually connected to each other.

Preferably, after the step of processing the breakable slot, the method further comprises the following steps:

and an expansion hole processing step, namely drilling expansion holes on the bottom wall of the easy-breaking groove along the groove depth direction of the easy-breaking groove, wherein the expansion holes penetrate through two ends of the connecting rod.

Preferably, the first and second electrodes are formed of a metal,

the plane perpendicular to the groove depth direction of the easy-breaking groove is a first plane, and the projection shape of the easy-breaking groove on the first plane is asymmetric.

Preferably, the first and second electrodes are formed of a metal,

the connecting rod has at least two.

Preferably, before the shaft hole machining step and after the blank forming step, the method further includes:

and (3) processing the shape and position size of the cylinder block body, wherein the processing step is used for finish machining the caliber of the cylinder and the fixed matching surface of the stator so as to ensure that the shape and position size meets the design requirement.

Preferably, the cylinder seat blank is integrally formed by casting.

The invention also provides a cylinder seat which is manufactured by the manufacturing method.

The invention also provides a compressor, which comprises the cylinder block.

According to the cylinder block manufacturing method, the cylinder block and the compressor, after the cylinder block body blank and the bracket blank are integrally formed into the integral cylinder block blank, the first shaft hole and the second shaft hole are machined on the integral cylinder block blank in the same machining process and finished at one time, so that the coaxiality of the first shaft hole and the second shaft hole is guaranteed, the phenomenon that the coaxiality is low due to the accumulation of machining errors and assembly errors after the bracket and the shaft holes in the bracket are separately manufactured and assembled with the cylinder block in the prior art is effectively avoided, and the abrasion of the matching position of the shaft holes after the crankshaft is assembled is effectively reduced.

Drawings

FIG. 1 is a schematic structural diagram of a cylinder block formed by a cylinder block manufacturing method according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural view of the stent of FIG. 1;

fig. 4 is a schematic structural diagram of a compressor according to an embodiment of the present invention.

The reference numerals are represented as:

1. a cylinder block body; 11. a second shaft hole; 2. a support; 21. a first shaft hole; 3. a crankshaft; 4. a connecting rod; 41. a breakable groove; 42. a first pole segment; 43. a second pole segment; 44. connecting holes; 5. expanding the hole; 6. and a cylinder.

Detailed Description

With combined reference to fig. 1 to 4, according to an embodiment of the present invention, there is provided a cylinder block manufacturing method, where the cylinder block includes a cylinder block body 1 and a bracket 2 integrally formed with the cylinder block body 1, and the bracket 2 is used to support a shaft end of a crankshaft 3 of a compressor, including a blank forming step of integrally forming a cylinder block blank, where the cylinder block blank includes a cylinder block body blank and a bracket blank; and a shaft hole processing step, namely processing a first shaft hole 21 on the support blank and a second shaft hole 11 on the cylinder seat body blank, wherein the first shaft hole 21 and the second shaft hole 11 are processed in the same machining procedure. In the technical scheme, after the cylinder seat body blank and the bracket blank are integrally formed into an integral cylinder seat blank, the first shaft hole 21 and the second shaft hole 11 are integrally processed on the cylinder seat blank, and the first shaft hole 21 and the second shaft hole 11 are processed in the same machining process in one step, so that the coaxiality of the first shaft hole and the second shaft hole is ensured, the phenomenon that the bracket and the shaft holes in the bracket in the prior art are separately manufactured and then assembled with the cylinder seat and then the coaxiality is lower due to accumulation of machining errors and assembly errors is effectively avoided, and the abrasion of the matching position of the shaft holes after the crankshaft is assembled is effectively reduced. The same machining process refers to a shaft hole machining operation process only performed on the cylinder block blank once, and for example, when the shaft hole machining is performed by using a boring machine, the clamping and lathe-feeding fixing of the cylinder block blank only needs to be performed once.

It can be understood that, there is an assembly space for the motor rotor and the stator between the cylinder block body blank and the bracket blank, in this case, there is a connecting rod 4 between the cylinder block body blank and the bracket blank, the length direction of the connecting rod 4 is used as a part of the assembly space, and after the shaft hole processing step, there is also: a connection hole tapping step of drilling and tapping a connection hole 44 in the extending direction of the connection rod 4; a breakable groove processing step of cutting a breakable groove 41 in the connecting rod 4 in a direction perpendicular to the tapping direction to divide the connecting rod 4 into a first rod segment 42 and a second rod segment 43 virtually joined to each other. In this technical solution, after the first shaft hole 21 and the second shaft hole 11 are processed, the bracket 2 can be separated from the cylinder block body 1, so that the assembly and assembly process of the motor rotor and the stator in the assembly space can be facilitated, and after the motor rotor and the stator are assembled, the bracket is connected to the connecting hole 44 through a connecting member such as a bolt or a screw, so that the cylinder block body 1 and the bracket 2 are connected into a whole again.

Further, after the processing step of the easy breaking groove, the method also comprises the following steps: and an expansion hole processing step of drilling expansion holes 5 on the groove bottom wall of the easy-breaking groove 41 along the groove depth direction of the easy-breaking groove 41, wherein the expansion holes 5 penetrate through two ends of the connecting rod 4. The separation process between the first rod section 42 and the second rod section 43 can be facilitated by the arrangement of the expansion hole 5, and specifically, when the rotor and the stator of the motor need to be assembled (as can be understood, the process should be after the shaft hole processing step), the expansion piece is adopted to penetrate into the expansion hole 5 and the first rod section 42 and the second rod section 43 are smoothly separated by virtue of the expansion force.

In order to prevent the occurrence of the aliasing phenomenon when the first rod segment 42 is separated from the second rod segment 43 and then assembled again, a plane perpendicular to the groove depth direction of the easy-breaking groove 41 is a first plane, and the projection shape of the easy-breaking groove 41 on the first plane is asymmetric, for example, a corresponding small protrusion is provided on one side and not provided on the other side, or the shape of one side is a circular arc and the shape of the other side is a straight line.

The connecting rods 4 preferably have at least two, and the support frame 2 is more stable and reliable in position under the support of at least two connecting rods 4 when the first shaft hole 21 is machined.

It is to be understood that the step of machining the shaft hole and the step of forming the blank have the following steps: and (3) machining the shape and position size of the cylinder block body, wherein the machining step is used for finish machining the caliber of the cylinder 6 and the fixed matching surface of the stator so as to ensure that the shape and position size meets the design requirement. And integrally forming a cylinder seat blank by adopting a casting mode.

The invention also provides a compressor, which comprises the cylinder block.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A manufacturing method of a cylinder block is characterized in that the cylinder block comprises a cylinder block body (1) and a bracket (2) which is integrally formed with the cylinder block body (1), the bracket (2) is used for supporting the shaft end of a crankshaft (3) of a compressor, and the manufacturing method comprises the following steps,

and a shaft hole processing step, namely processing a first shaft hole (21) in the support blank and a second shaft hole (11) in the cylinder seat body blank, wherein the first shaft hole (21) and the second shaft hole (11) are processed in the same machining procedure.

2. The method of manufacturing according to claim 1, wherein a connecting rod (4) is provided between the cylinder block body blank and the bracket blank, and after the shaft hole machining step:

a connecting hole tapping step of drilling and tapping a connecting hole (44) along the extending direction of the connecting rod (4);

and a step of machining a breakable groove by cutting a breakable groove (41) in the connecting rod (4) in a direction perpendicular to the tapping direction to divide the connecting rod (4) into a first rod segment (42) and a second rod segment (43) which are virtually connected to each other.

3. The method of manufacturing according to claim 2, further comprising, after the step of processing the frangible groove:

and an expansion hole processing step, drilling expansion holes (5) on the groove bottom wall of the easy-breaking groove (41) along the groove depth direction of the easy-breaking groove (41), wherein the expansion holes (5) penetrate through two sides of the connecting rod (4).

4. The method of manufacturing according to claim 2,

a plane perpendicular to the groove depth direction of the easy breaking groove (41) is a first plane, and the projection shape of the easy breaking groove (41) on the first plane is asymmetric.

5. The method of manufacturing according to claim 2,

the connecting rods (4) are at least two.

6. The method of manufacturing according to claim 1, further comprising, before the shaft hole machining step and after the blank forming step:

and (3) machining the shape and position size of the cylinder block body, wherein the machining step is used for finish machining the caliber of the cylinder (6) and the fixed matching surface of the stator so as to ensure that the shape and position size meets the design requirement.

7. The method of claim 1, wherein the cylinder block blank is integrally formed by casting.

8. A cylinder block, characterized in that it is manufactured by the method of any one of claims 1 to 7.

9. A compressor comprising a cylinder block, wherein the cylinder block is the cylinder block of claim 8.