JP2858547B2 - Bearing alignment method and bearing alignment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing alignment between a main bearing and a sub-bearing, for example, when assembling a bearing used for a rotary compressor, in which a crankshaft is fitted so as to sandwich an eccentric portion of the crankshaft. The present invention relates to a bearing alignment method and a bearing alignment device for positioning a main bearing and an auxiliary bearing to be combined on the same axis or on a predetermined relative position.

[0002]

2. Description of the Related Art Generally, a journal bearing is generally used as a bearing for two bearings for supporting a crankshaft of a rotary compressor because a radial load on the bearing is large. If the bearing centers of the two journal bearings do not match, mechanical loss in the bearing portion increases, which leads to a reduction in compressor performance and, in the worst case, a serious accident such as seizure of the bearing portion. In addition, if the two bearing centers are made to coincide with each other with high precision, mechanical loss of the bearing portion can be reduced, and the performance of the compressor can be improved. Therefore, it is necessary to align and assemble the bearings so that the axes of the two bearings coincide with high precision.

As a bearing alignment device for such a rotary compressor, there is a bearing alignment device for a rotary compressor disclosed in Japanese Patent Application Laid-Open No. 63-47518. FIG.
FIG. 1 is a sectional view showing a schematic configuration of a conventional rotary compressor. In FIG. 13, reference numeral 101 denotes a crankshaft having an eccentric portion 102 in the middle, 104 denotes a main bearing 103 having a bolt 107
The cylinder 105 fixed by the eccentric part 10
2, the roller mounted on the crankshaft 101;
Sub bearing that radially supports the upper shaft end of the main bearing.
After aligning the sub bearing 106 with respect to the axis 3
Is fixed to the cylinder 104. The main bearing 103, the crankshaft 101, the roller 105, the cylinder 104, and the sub-bearing 106 form an assembly 109. FIG. 14 is a sectional view showing a state before assembly in which a main bearing and an auxiliary bearing are set in a bearing alignment device of a conventional rotary compressor. FIG.
FIG. 5 is a sectional view showing a state where a main bearing and a sub-bearing are assembled in a bearing alignment device of a conventional rotary compressor. In the figure,
A holder 131 for detachably fixing the main bearing 103 is mounted on a horizontally moving XY table 132, and the XY table 132 is fixed to a lower upper surface of a support stand 135. Reference numeral 133 denotes a driver that is removably engaged with the lower notch 101c of the crankshaft 101. Reference numeral 134 denotes an electric motor in which a rotating shaft 134a is fixed to the driver 133 and the crankshaft 101 is rotationally driven via the driver 133. In addition, the electric motor 134 is supported on the lower lower surface of the support stand 135 so as to be vertically movable. 136 is a displacement sensor such as an eddy current sensor, and the displacement sensor 136 is a sensor holder 1
A total of four are arranged on the support base 135 via the 37 so as to be able to move in these directions in front and rear and right and left directions orthogonal to each other. Reference numeral 138 denotes a movable table that detachably holds the sub-bearing 106. The movable table 138 is supported above the support table 135 so as to be able to reciprocate only in the vertical direction, and is disposed above the holder 131. 139 is a moving table 138
Lifting mechanism such as an air cylinder mechanism connected to the
The elevating mechanism 139 is fixed on a support 135. 1
Numeral 40 is a member for positioning the center of the inner diameter of the sub-bearing 106. This member 140 is constituted by a rod-shaped air sensor and is fixed to the support stand 135. It is designed to be inserted into the part.

Next, a method of aligning the bearing will be described.
FIG. 16 is a flowchart showing a bearing assembly process. First, as shown in FIG. 14, the holder 13 is assembled with the main bearing 103, the crankshaft 101, and the roller 105 combined.
1 and the main bearing 103 is detachably fixed to the holder 131. At this time, the cylinder 104 is
(Step 101; hereinafter, referred to as ST101). Further, at the time of the setting, the notch 101c of the lower end of the crankshaft 101 is engaged with the driver 133 at the raised position (ST102). Next, when the electric motor 134 is driven and the crankshaft 101 is rotated via the driver 133 (ST103), the crankshaft 10
1 has an eccentric portion 102, and thus tilts due to imbalance, resulting in a two-point contact state in the bearing portion of the main bearing 103. When the crankshaft 101 rotates in an inclined state, the center of the crankshaft 101 moves concentrically with the center of the inner diameter of the main bearing 103, so that the left and right displacement sensors 136 and the right and left displacement sensors 136 are arranged in a direction perpendicular thereto. When the minimum distance is measured by the displacement sensor 136, the center of the inner diameter of the main bearing 103 is obtained (ST104). On the other hand, the sub bearing 106 is detachably fixed to the ascending movable table 138, and the center of the inner diameter of the sub bearing 106 is measured and obtained by a positioning member 140 such as an air sensor (ST105). After lowering the driver 133 together with the electric motor 134 to release the engagement with the crankshaft 101 (ST106), ST104 and ST1
The XY table 132 is horizontally moved based on the center positions of the inner diameters of the main bearing 103 and the sub-bearing 106 obtained in the step 05, and the main center of the main bearing 103 and the sub-bearing 106 are aligned with each other or shifted to a position shifted by a predetermined amount in a predetermined direction. The bearing 103 is positioned (ST107). Further, as shown in FIG. 15, the crankshaft 101 is placed in an upright state, the lifting mechanism 139 is driven to lower the movable table 138, and the sub bearing 106 is inserted into the crankshaft 101 and supported on the cylinder 104 (ST).
108). The sub-bearing 106 is fixed to the cylinder 104 with the bolt 108 to complete the assembly (ST10).
9).

[0005]

As described above, in the bearing alignment method using the bearing alignment device of the conventional rotary compressor, when the crankshaft 101 rotates, the crankshaft 101 is caused by centrifugal force generated in the eccentric portion 102. The clearance CR (shown in FIG. 13) between the roller 105 and the cylinder 104 in the eccentric direction of the eccentric portion 102 is inclined in a direction in which the clearance CR becomes smaller. In the current rotary compressor, the CR changes depending on the rotation phase of the crankshaft 101. It is known that the outer circumference of the roller 105 and the inner circumference of the cylinder 104 interfere as shown in FIG. 17A in the phase range where CR is smaller than the dimensional relationship among L1, L2, CF, and CR shown in FIG. . When the above-described interference occurs, the crankshaft 10 measured by the displacement sensor 136
The trajectory 1 includes an interference portion and is not concentric with the inner peripheral center of the main bearing 103, so that the inner peripheral center of the main bearing 103 cannot be accurately obtained. Therefore, the sub bearing 6 is replaced with the main bearing 3.
Cannot be accurately aligned with the center of the inner circumference of the bearing, and the assembly accuracy as a bearing is limited.

In the conventional bearing centering device for a rotary compressor, since the inner circumference of the sub bearing 106 is directly measured by the displacement sensor 136, the inner circumference of the sub bearing 106 is temporarily assembled with the sub bearing 106. Cannot be measured directly, so that the alignment work cannot be performed. Further, the auxiliary bearing 1
In order to position the sub-bearing 106 by directly measuring the inner circumference of 06 and insert it into the crankshaft 101, a very high-precision mechanism is required, and the device becomes complicated and expensive. Therefore, a highly accurate measurement method in a state where the auxiliary bearing 106 is temporarily assembled to the cylinder 104 has been sought.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and means for avoiding interference between the outer periphery of a roller and the inner periphery of a cylinder in a process prior to rotation of a crankshaft for alignment. In addition, the crankshaft is tilted and swung without contact between the outer circumference of the roller and the inner circumference of the cylinder, so that the inner circumference of the main bearing and the sub-bearing can be measured directly. The center of the inner periphery of the main bearing 3 and the center of the sub-bearing 6 can be accurately determined, and the bearings are aligned and assembled so that the misalignment between the center of the main bearing 3 and the center of the sub-bearing 6 is minimized (ideally, zero). An object of the present invention is to provide a simple, highly accurate, and highly reliable bearing alignment method and a bearing alignment device that can be performed.

[0008]

According to a first aspect of the present invention, there is provided a bearing centering method, comprising: a cylinder accommodating an eccentric portion of a crankshaft and a roller fitted around an outer periphery of the eccentric portion of the crankshaft; A first step of fixing the main bearing and the main bearing of the main bearing and the sub-bearing, which are disposed at both ends of the crankshaft and close both ends of the cylinder, in a direction opposite to the eccentric direction of the eccentric portion of the crankshaft; A second step of providing tilting moment applying means, a third step of rotating the crankshaft, a fourth step of measuring a position of the sub bearing with respect to the main bearing when the crankshaft rotates, a fourth step of A fifth step of positioning the sub-bearing based on the measurement result of the fifth step;
And a sixth step of pressing and fixing the auxiliary bearing positioned in step (c) to the cylinder.

In the bearing alignment method according to a second aspect of the present invention, in the fourth step and the fifth step of the first aspect, the position of the auxiliary bearing with respect to the bearing alignment device is measured, and the axis of the main bearing is measured. In contrast, the positioning of the auxiliary bearing is specified so as to minimize the misalignment of the axis of the auxiliary bearing.

According to a third aspect of the present invention, in the fifth and sixth steps of the first and second aspects, the positioning and fixing of the sub-bearing is performed by applying a pressing force for pressing the sub-bearing. This specifies that the operation is performed while controlling.

According to a fourth aspect of the present invention, in the fifth and sixth steps of the third aspect, the pressing force for pressurizing the auxiliary bearing is controlled in synchronization with the rotation of the crankshaft. Is what you do.

According to a fifth aspect of the present invention, there is provided a bearing centering device, wherein a cylinder accommodating an eccentric portion of a crankshaft and a roller fitted around an outer periphery of the eccentric portion of the crankshaft are disposed at both ends of the cylinder. Rotating means for rotating the crankshaft while the main bearing and the sub-bearing, which support the crankshaft and close both ends of the cylinder, are fixedly held, and the crankshaft is rotated when the crankshaft rotates. A moment applying means for inclining the eccentric portion of the crankshaft in a direction opposite to the eccentric direction; a measuring means for measuring a position of the auxiliary bearing with respect to the main bearing when the crankshaft rotates; A pressurizing means for pressurizing in the direction, a sub-bearing positioning means for positioning the sub-bearing, and a fixing means for fixing the sub-bearing to the cylinder. A.

According to a sixth aspect of the present invention, in the bearing centering device according to the fifth aspect, the moment applying means is provided between the end of the crankshaft on the side where the main bearing is arranged and the main bearing arrangement part. Eccentric load that can be attached and detached.

According to a seventh aspect of the present invention, in the bearing centering device according to the fifth aspect, the rotating means for rotating the crankshaft transmits the rotating force generated by the rotating force generating means to the crankshaft. And a torque transmitting means, wherein the moment applying means is an eccentric load provided on the torque transmitting means.

According to an eighth aspect of the present invention, in the bearing alignment apparatus according to the fifth aspect, the measuring means for measuring the position of the auxiliary bearing with respect to the main bearing measures the position of the auxiliary bearing with respect to the bearing alignment apparatus. This defines that it is a measuring means.

According to a ninth aspect of the present invention, in the bearing centering device according to the eighth aspect, the auxiliary bearing measuring means is means for measuring the position of the outer peripheral surface of the auxiliary bearing.

In a tenth aspect of the present invention, the bearing alignment device according to the eighth aspect further comprises a main bearing measuring means for measuring a position of the main bearing fixed and held on the cylinder with respect to the bearing alignment device. It is specified.

According to an eleventh aspect of the present invention, in the tenth aspect, the main bearing measuring means is means for measuring the position of the outer peripheral surface of the main bearing.

A bearing centering apparatus according to a twelfth aspect of the present invention is the invention according to the tenth aspect, wherein the main bearing measuring means is means for measuring the position of the outer peripheral surface of the cylinder.

According to a thirteenth aspect of the present invention, there is provided a bearing centering device according to any one of the fifth, eighth and tenth aspects, wherein the pressurizing means of the auxiliary bearing is provided with a pressing force control means. It is.

According to a fourteenth aspect of the present invention, in the bearing centering device according to any one of the fifth, eighth, and tenth aspects, the rotating means for rotating the crankshaft includes a rotating force generating means and the rotating force generating means. Torque transmitting means for transmitting the generated torque to the crankshaft, the torque transmitting means having one or more axes perpendicular to the rotation axis of the torque generating means, A horizontal movement in a predetermined range in the axial direction of one or more axes perpendicular to the axis, and a rotational movement in a predetermined range around one or more axes perpendicular to the rotation axis are possible. This defines that the member is a joint member.

According to a fifteenth aspect of the present invention, in the bearing alignment device according to any one of the fifth, eighth, and tenth aspects, the auxiliary bearing positioning means is disposed in two orthogonal directions, and a method of measuring an outer peripheral surface of the auxiliary bearing. It is provided that a biaxial actuator that moves and positions in a linear direction and a biaxial back pressure applying means that presses the auxiliary bearing in a direction facing each of the actuators are provided.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention.
FIG. 4 is a diagram illustrating a bearing alignment device of a rotary compressor according to the present invention.
FIG. 1 is a side sectional view showing an outline of the apparatus, and FIG. 2 is a top view. In the figure, an eccentric portion of a crankshaft 1 on which a roller 5 is fitted is housed in a cylinder 4, and a main assembly 3 and a sub-bearing 6 are arranged at both ends thereof, and a temporarily assembled body 9 is an air cylinder 12a. By the operation described above, the cylinder 4 is chucked by the main bearing clamp mechanism 13, whereby the main bearing 3 is fixed to the mount 11 which is fixed horizontally. Mounting base 1
A mounting plate 14 fixed by a support or the like is provided below 1, and a motor is provided on a lower surface of the mounting plate 14. Motor 15
The crankshaft 1 is connected to the rotating shaft 16 via a coupling (corresponding to a rotating force transmitting means) 17. An eccentric load (eccentric weight) 18 serving as a moment adding means is attached near the connecting portion of the crankshaft 1. When the motor 15 is driven and the crankshaft 1 is rotated, the eccentric portion 2 of the crankshaft 1 is provided without the eccentric weight 18 as in the conventional case.
The crankshaft 1 is inclined relative to the main bearing 3 in the direction opposite to the eccentric direction of the eccentric portion 2 of the crankshaft 1 when the eccentric weight 18 is provided as in the present embodiment. It starts to tilt and whirling. The condition of the eccentric weight 18 such as its mounting position and load is adjusted in advance. Reference numeral 21 denotes a top plate fixed above the mounting base 11 by a support or the like, and is a sub-bearing pressing mechanism 19, a sub-bearing pressing mechanism 1
Cylinder 12b and bolt tightening mechanism 2 for driving screw 9
2 are provided. Reference numeral 20 denotes a sub-bearing measurement mechanism fixed to the upper surface of the mounting base 11, which can measure the position of the sub-bearing 6 during rotation of the crankshaft 1 and alignment of the sub-bearing 6 in real time. In FIG. 2, reference numeral 23 denotes an actuator fixed to the upper surface of the mounting base 11, and 24 denotes a back pressure applying mechanism fixed to the upper surface of the mounting base 11, which moves so as not to contact the auxiliary bearing 6 during rotation of the crankshaft 1. It is configured to be able to.

FIG. 3 is a flowchart showing a method of assembling a rotary compressor using the same device. Hereinafter, the details of the bearing alignment method according to the present invention will be described with reference to this flowchart. First, the assembly 9 is set on the mounting base 11, and the main bearing 3 is fixed to the mounting base 11 by the main bearing clamp mechanism 13 by operating the air cylinder 12 (Step 1; hereinafter, referred to as ST1). An eccentric weight 18 is attached to the lower end of the shaft 1 in the same direction as the eccentric direction of the eccentric portion 2 with respect to the axis of the crankshaft 1 (S
T2) The lower end of the crankshaft 1 is connected to the coupling 17 (ST3). Next, when the motor 15 is driven to rotate the crankshaft 1 (ST4), the crankshaft 1 moves in the direction opposite to the eccentric direction of the eccentric portion 2 with respect to the main bearing 3 due to the centrifugal force generated in the eccentric weight 18. Since the auxiliary bearing 6 oscillates in an inclined manner, the sub bearing 6 swings in a horizontal plane perpendicular to the axis of the crankshaft 1 so as to draw a circular locus. The trajectory of the sub bearing 6 at this time is measured and stored by the sub bearing measurement mechanism 20 (ST5), and the center O of the stored circular trajectory is calculated (ST6). Next, the motor 15 is stopped (ST
7), the actuator 23 and the back pressure applying mechanism 24 are operated to position the auxiliary bearing 6 at the position of O (ST).
8). The auxiliary bearing pressurizing mechanism 19 is operated to pressurize the auxiliary bearing 6 (ST9), and the bolt fastening mechanism 22 is operated to fix the auxiliary bearing 6 to the cylinder 4 (ST10).

Here, the position of the center O of the swing locus of the auxiliary bearing 6 when the crankshaft 1 is rotating will be described. FIG. 4 is a sectional view showing a state where the crankshaft is rotating. FIG. 5 is a diagram for explaining the center of the crankshaft drawn with the rotation of the crankshaft and the circular orbit drawn by the auxiliary bearing. In the figure, the Z axis is the central axis of the inner circumference of the main bearing 3, C1 is a circular orbit drawn by the axis center of the crankshaft 1,
C2 is a circular orbit drawn by the sub bearing 6 that moves with the rotation of the crankshaft.

As shown in FIG. 4A, when the crankshaft 1 rotates, the crankshaft 1 tilts in the direction opposite to the eccentric direction of the eccentric portion 2 due to the centrifugal force generated on the eccentric weight 18, so that the outer periphery of the roller 5 and the cylinder 4 The inner circumference does not interfere, and the crankshaft 1 and the main bearing 3 oscillate while maintaining a two-point contact state (P and Q in FIG. 4) as shown in the figure. FIG. 4B shows FIG.
3A shows a state where the rotational phase of the crankshaft 1 is different from that of the crankshaft 1 by 180 °. As described above, since the crankshaft 1 oscillates while maintaining two-point contact with the inner periphery of the main bearing 3, the upper end of the crankshaft 1 is located in a plane orthogonal to the central axis of the inner periphery of the main bearing 3. Draw a circular orbit centered on the inner central axis of 3. The auxiliary bearing 6 is fitted on the upper end of the crankshaft 1,
The lubricating oil is merely filled in the gap between the inner periphery of the crankshaft and the oil film to form an oil film, so that the sub-bearing 6 has a track substantially the same as the track at the upper end of the crankshaft 1. Therefore, the center O (shown in FIG. 5) of the circular orbit drawn by the sub-bearing 6 is a point on the inner peripheral center axis of the main bearing 3, and the misalignment of the sub-bearing axis with respect to the main bearing axis (ideally, ) The position where it becomes zero can be obtained.

In the present embodiment, the eccentric weight 18
This avoids interference between the outer circumference of the roller 5 and the inner circumference of the cylinder 4, and measures the position of the sub-bearing outer peripheral surface with respect to the device without measuring the inner circumference of the sub-bearing. Since the movement of the bearing can be measured, and the movement of the sub-bearing is measured in a state where the assembly 9 is temporarily assembled, the measurement accuracy is high and easy. Thereby, a bearing with little mechanical loss can be obtained, and the performance and reliability of the bearing can be improved.

After actually fixing the sub-bearing 6 at the center O of the circular orbit drawn by the sub-bearing 6 using the bearing alignment device of the rotary compressor configured as described above, the three-dimensional measuring device is mounted. As a result of measuring the position of the sub-bearing 6 with respect to the main bearing 3, the misalignment value of the inner peripheral axis of the sub-bearing 6 with respect to the inner peripheral axis of the main bearing 3 is about 3 μm. The time required for the filling and assembling process is reduced.

Embodiment 2 Hereinafter, another embodiment of the present invention will be described with reference to the drawings. 6 and 7 are views for explaining a bearing centering device for a rotary compressor according to a second embodiment of the present invention. FIG. 6 is a side sectional view showing an outline of the device.
Is a top view. In the figure, a main bearing measuring mechanism 25 is added to the first embodiment.

In step ST5 of the first embodiment,
Since the crankshaft 1 having the eccentric portion 2 and the eccentric weight 18 attached thereto rotates, a force due to whirling motion is applied to the main bearing 3. Therefore, in the device of the first embodiment, the main bearing 3 is fixed by the main bearing clamp mechanism 13 with a very large clamping force that does not change the position of the main bearing 3 even when the force due to the whirling motion is applied. Without it, the movement of the auxiliary bearing 6 cannot be measured. However, in the present embodiment, the position of the main bearing 3 with respect to the device is measured by using the main bearing measuring mechanism 25, so that the sub bearing 6 with respect to the main bearing 3 can be held even if the clamping force of the main bearing clamping mechanism 13 is not large. Exercise can be measured accurately. Thereby, a bearing with little mechanical loss can be obtained, and the performance and reliability of the bearing can be improved.

Although FIGS. 6 and 7 show the example in which the main bearing measuring mechanism 25 is arranged so as to measure the outer peripheral surface of the cylinder 4, the main bearing 3 is fixed to the cylinder 4 in advance. Therefore, the axial center of the main bearing can be measured regardless of the outer peripheral surface of either the cylinder 4 or the main bearing 3. Furthermore, the axis of the main bearing can be measured regardless of which part of the main bearing 3 and the cylinder 4 is measured. Even if the clamping force of the main bearing clamping mechanism 13 is not large, the movement of the sub-bearing 6 with respect to the main bearing 3 can be measured. Can be measured.

Embodiment 3 FIG. Hereinafter, another embodiment of the present invention will be described. Embodiment 3 A bearing centering method for a rotary compressor according to Embodiment 3 of the present invention is described in Embodiment 1 above.
A control function capable of freely controlling the pressurizing force of the sub-bearing pressurizing mechanism 19 is added to the device configuration in the above, so that the pressurizing force is controlled.

FIG. 8 is a flowchart showing a part of the method of assembling the rotary compressor according to the present embodiment. Steps ST1 to ST6 are the same as in the first embodiment. After calculating the center O of the swing locus in step ST6, the auxiliary bearing 6 is pressurized by the auxiliary bearing pressurizing mechanism 19 while appropriately controlling the pressing force, so that the auxiliary bearing 6 is roughly aligned (ST7a). Next, the motor 15 is stopped (ST
7b) The auxiliary bearing pressurizing mechanism 19 is operated to release the auxiliary bearing pressing force (ST7c), and the actuator 23 and the back pressure applying mechanism 24 are operated to position the auxiliary bearing 6 at the O position (ST8). ). The sub-bearing pressurizing mechanism 19 is operated again to pressurize the sub-bearing 6 (ST9), and the bolt tightening mechanism 2 is pressed.
2 to fix the sub bearing 6 to the cylinder 4 (ST
10).

As described above, by introducing the step of coarsely aligning the auxiliary bearing 6 while appropriately controlling the pressing force, the auxiliary bearing 6 can be accurately positioned in a short time, and the productivity of the bearing can be improved. Is improved. Further, a bearing with less mechanical loss can be obtained, and the performance and reliability of the bearing can be improved.

Embodiment 4 FIG. Hereinafter, another embodiment of the present invention will be described. Embodiment 4 A method for aligning a bearing of a rotary compressor according to Embodiment 4 of the present invention is described in Embodiment 1 above.
A control function is added to the device configuration in which the motor 15 can freely control the rotation speed of the crankshaft and the sub-bearing pressurizing mechanism 19 can press the sub-bearing with at least two levels of pressing force. The pressure is controlled. FIG. 9 shows a configuration of a bearing centering device of a rotary compressor to which a pressing force control device 41 for a sub bearing is added to FIG. In the figure, a pressing force control device 41 controls the pressing force of the sub bearing by synchronizing the rotation speed of the motor 15 and the sub bearing pressurizing mechanism 19.

FIG. 10 is a flowchart showing a part of the method for assembling the rotary compressor according to the present invention. Step S
The process from T1 to step ST6 is the same as in the first embodiment. After calculating the center O of the swing locus in step ST6,
First, the auxiliary bearing is pressurized by the auxiliary bearing pressurizing mechanism 19 with a pressing force F1 that does not stop the swinging motion of the auxiliary bearing 6 (ST7).
a '). Next, while appropriately controlling the rotation speed of the motor 15, the rotation speed of the crankshaft 1 is reduced and stopped, and the auxiliary bearing 6 is roughly aligned (ST7b '). Next, the auxiliary bearing pressurizing mechanism 19 is operated to release the auxiliary bearing pressing force (ST7).
c) The actuator 23 and the back pressure applying mechanism 24 are operated to position the auxiliary bearing 6 at the position of O (step ST8). The sub-bearing pressurizing mechanism 19 is operated again to pressurize the sub-bearing 6 with the pressing force F2 at which the sub-bearing 6 does not move at the time of bolt fastening (ST9), and the bolt tightening mechanism 22 is operated to transfer the sub-bearing 6 to the cylinder 4. It is fixed (ST10).

As described above, by introducing the step of coarsely aligning the sub bearing 6 while controlling the pressing force in synchronization with the rotation speed of the motor, the sub bearing 6 can be accurately positioned in a short time. Become. Thereby, a bearing with little mechanical loss can be obtained, and the performance and reliability of the bearing can be improved. Further, the productivity of these bearings with high assembling accuracy is improved.

Embodiment 5 Hereinafter, another embodiment of the present invention will be described. In the above-described first to fourth embodiments, the coupling 17 and the eccentric weight 18 are separately configured, and the example in which the eccentric weight 18 is attached to the crankshaft 1 every time the alignment is performed has been described. May be provided on the coupling 17. FIG. 11 is a diagram showing a configuration of a connecting portion between the crankshaft and the coupling.
For example, as shown in FIG. 11, an eccentric weight 18 is provided at a connection portion of the coupling 17 with the crankshaft 1, and a crankshaft 1 is provided at a connection portion of the coupling 17 with the crankshaft 1.
Is provided with a claw 17a that can be inserted into the groove 1a at the shaft end. The mounting phase of the eccentric weight 18 with respect to the axis of the motor shaft 16 is determined by taking into account the phase relationship between the groove 1a at the shaft end of the crankshaft 1 and the eccentric part 2, and when the crankshaft 1 and the coupling 17 are connected, Of the eccentric portion 2 of the eccentric portion 2.

In the case of such an apparatus, the step of attaching the eccentric weight 18 to the crankshaft 1 can be omitted, and the time required for the alignment of the bearing can be reduced. Therefore, the productivity of a highly reliable bearing with high assembling accuracy is improved.

Further, the first to fifth embodiments are described.
In this case, if an Oldham-type coupling (corresponding to a joint member constituting a rotational force transmitting means) is used as the coupling 17, more accurate alignment can be achieved. FIG. 12 shows the configuration of this coupling. (A) in the figure is an example using a bellows-type coupling that is commonly used, and (b) in the figure.
Is an example using an Oldham type coupling proposed in the present invention. In the bellows type, the rotating shaft 1
As shown in the figure, the centripetal force acts to match the crankshaft 1 with the crankshaft 6, and the bellows is distorted as shown in the figure, so that the load on the coupling portion is large. However, in the Oldham type, since the horizontal movement is possible in a plane perpendicular to the rotation axis, regardless of the eccentric amount of the crankshaft 1 with respect to the axis of the rotation axis 16 of the motor 15, the crankshaft 1 Does not generate a centripetal force that tries to match the axes of the main bearing 3, the crankshaft 1 can freely oscillate, and the point at which the misalignment of the auxiliary bearing 6 with respect to the axis of the main bearing 3 becomes zero is stabilized. Can be obtained with high accuracy.

As described above, if the rotational force transmitting means (coupling) is configured to transmit the rotational movement from the rotational force generating means to the crankshaft and not restrict the movement other than the rotational movement, Oldham It is not limited to a mold coupling.

When an eccentric weight is attached to the Oldham type coupling, it goes without saying that the eccentric weight is attached at the position X in FIG. 12B, that is, near the connecting portion near the crankshaft.

Further, in the first to fifth embodiments, an example has been shown in which the auxiliary bearing measuring mechanism 18 measures the position of the outer peripheral surface of the auxiliary bearing 6 with respect to the device. The same effect can be obtained by measuring

[Brief description of the drawings]

FIG. 1 is a side sectional view illustrating a bearing centering device of a rotary compressor according to an embodiment of the present invention.

FIG. 2 is a top view of FIG. 1 illustrating a bearing centering device of the rotary compressor according to one embodiment of the present invention;

FIG. 3 is a flowchart showing a method of assembling the rotary compressor according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a swinging motion of a sub bearing according to an embodiment of the present invention.

FIG. 5 is a sectional view illustrating a swing locus of a crankshaft and a swing locus of an auxiliary bearing according to an embodiment of the present invention.

FIG. 6 is a side sectional view illustrating a bearing centering device of a rotary compressor according to another embodiment of the present invention.

FIG. 7 is a top view of FIG. 6 illustrating a bearing centering device for a rotary compressor according to another embodiment of the present invention.

FIG. 8 is a flowchart showing a method of assembling a rotary compressor according to another embodiment of the present invention.

FIG. 9 is a diagram illustrating a bearing alignment device of a rotary compressor according to another embodiment of the present invention.

FIG. 10 is a flowchart showing a method of assembling a rotary compressor according to another embodiment of the present invention.

FIG. 11 is a partial configuration diagram illustrating a bearing alignment device of a rotary compressor according to another embodiment of the present invention.

FIG. 12 is a diagram illustrating a configuration of a coupling of a bearing alignment device of a rotary compressor according to another embodiment of the present invention.

FIG. 13 is a sectional view showing a conventional rotary compressor.

FIG. 14 is a sectional view of a state of a main / sub bearing set showing a bearing alignment device of a conventional rotary compressor.

FIG. 15 is a cross-sectional view of a conventional rotary compressor bearing alignment device in an assembled state.

FIG. 16 is a flowchart illustrating a method of assembling a conventional rotary compressor.

FIG. 17 is a cross-sectional view showing a state of a rotary compressor at the time of assembly in a bearing alignment device of a conventional rotary compressor.

[Explanation of symbols]

1 crankshaft, 2 eccentric part, 3 main bearing,
4 cylinders, 5 rollers, 6 auxiliary bearings, 7
Bolt, 8 bolt, 9 Assembled body, 11
Mounting stand, 12a, 12b Air cylinder, 13 Main bearing clamp mechanism, 14 Motor mounting plate, 15
Motor, 16 rotation axis, 17 coupling,
18 Eccentric weight, 19 Secondary bearing pressurizing mechanism, 20
Auxiliary bearing measuring mechanism, 21 top plate, 22 bolt tightening mechanism, 23 actuator, 24 back pressure applying mechanism,
25 Main bearing measuring mechanism, 31 Holder, 32
XY table, 33 driver, 34 electric motor, 3
Reference Signs List 5 support stand, 36 displacement sensor, 37 sensor holder, 38 moving stand, 39 elevating mechanism, 40 positioning member, 41 auxiliary bearing pressure control device, 101 crankshaft, 101c notch, 102 eccentric part,
103 main bearing, 104 cylinder, 105 roller, 106 auxiliary bearing, 107 bolt, 108
Bolt, 109 Assembled body, 131 Holder, 13
2 XY table, 133 driver, 134 electric motor, 134a rotating shaft, 135 support base, 136
Displacement sensor, 137 sensor holder, 138 moving table, 139 elevating mechanism, 140 positioning member,

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F04C 29/00 F04C 18/356 F04C 15/00

Claims (15)

(57) [Claims] 1. A cylinder for accommodating an eccentric portion of a crankshaft and a roller fitted on an outer periphery of the eccentric portion of the crankshaft, and a main body disposed at both ends of the cylinder for supporting the crankshaft and closing both ends of the cylinder. A first step of fixing and holding the main bearing of the bearing and the sub-bearing; a second step of providing a moment applying means for tilting the eccentric portion of the crankshaft in a direction opposite to the eccentric direction; and rotating the crankshaft. A third step, a fourth step of measuring the position of the sub bearing with respect to the main bearing when the crankshaft rotates, and a fifth step of positioning the sub bearing based on the measurement result of the fourth step And a sixth step of pressing and fixing the sub-bearing positioned in the fifth step to the cylinder and fixing the same. 2. In a fourth step and a fifth step, the position of the sub-bearing with respect to the bearing alignment device is measured to minimize the misalignment of the axis of the sub-bearing with respect to the axis of the main bearing. The bearing alignment method according to claim 1, wherein the auxiliary bearing is positioned. 3. The bearing adjustment according to claim 1, wherein in the fifth step and the sixth step, positioning and fixing of the sub-bearing are performed while controlling a pressing force for pressing the sub-bearing. Core method. 4. The method according to claim 3, wherein in the fifth and sixth steps, the pressing force for pressurizing the auxiliary bearing is controlled in synchronization with the rotation of the crankshaft. 5. A cylinder for accommodating an eccentric portion of a crankshaft and a roller fitted on an outer periphery of the eccentric portion of the crankshaft, and a main body disposed at both ends of the cylinder for supporting the crankshaft and closing both ends of the cylinder. A rotating means for rotating the crankshaft in a state in which the main bearing of the bearing and the sub-bearing is fixedly held, and rotating the crankshaft during rotation of the crankshaft in a direction opposite to an eccentric direction of an eccentric portion of the crankshaft. Tilting moment applying means, measuring means for measuring the position of the sub bearing with respect to the main bearing when the crankshaft rotates, pressurizing means for pressing the sub bearing axially against the cylinder, and the sub bearing A bearing centering device, comprising: a sub-bearing positioning means for positioning the sub-bearing; and a fixing means for fixing the sub-bearing to the cylinder. 6. The crankshaft according to claim 5, wherein the moment applying means is a detachable eccentric load provided between an end of the crankshaft on the side where the main bearing is arranged and the main bearing arrangement portion. A bearing alignment device as described in the above. 7. A rotating means for rotating the crankshaft includes a rotating force generating means and a rotating force transmitting means for transmitting the rotating force generated by the rotating force generating means to the crankshaft, and the moment applying means is a rotating force transmitting means. The bearing centering device according to claim 5, wherein the eccentric load is provided on the bearing. 8. The bearing adjusting device according to claim 5, wherein the measuring means for measuring the position of the auxiliary bearing with respect to the main bearing is an auxiliary bearing measuring means for measuring the position of the auxiliary bearing with respect to the bearing alignment device. Core device. 9. The bearing centering device according to claim 8, wherein the auxiliary bearing measuring means is means for measuring the position of the outer peripheral surface of the auxiliary bearing. 10. The bearing alignment device according to claim 8, further comprising a main bearing measuring means for measuring a position of the main bearing fixedly held on the cylinder with respect to the bearing alignment device. 11. The bearing alignment device according to claim 10, wherein the main bearing measuring means is a means for measuring a position of an outer peripheral surface of the main bearing. 12. The main bearing measuring means is means for measuring the position of the outer peripheral surface of the cylinder.
3. The bearing alignment device according to item 1. 13. The bearing centering device according to claim 5, wherein a pressurizing force control means is provided in the pressurizing means of the auxiliary bearing. 14. A rotating means for rotating a crankshaft comprises: a rotating force generating means; and a rotating force transmitting means for transmitting a rotating force generated by the rotating force generating means to a crankshaft, wherein the rotating force transmitting means includes the rotating force. One or more axes perpendicular to the rotation axis of the generating means, and a horizontal movement of a predetermined range in the axial direction of one or more axes perpendicular to the rotation axis; The bearing member according to any one of claims 5, 8 and 10, wherein the joint member is a joint member capable of rotating and moving within a predetermined range around one or a plurality of shafts perpendicular to the shaft. Core device. 15. A two-axis actuator for positioning a sub-bearing in two orthogonal directions to move and position the sub-bearing in a direction normal to the outer peripheral surface of the sub-bearing, and to position the sub-bearing in a direction facing each of the actuators. The bearing centering device according to any one of claims 5, 8, and 10, further comprising a biaxial back pressure applying means for applying pressure.