A dynamic balance design structure of a scroll compressor orbiting scroll

Abstract

The utility model provides a kind of scroll compressor dynamic scroll plate static balance design structure, by cutting balance gap in end plate specific position, the mass distribution of dynamic scroll plate is adjusted, can simply and quickly make dynamic scroll plate radial, circumferential mass center coordinate zero, solve the vibration and bearing impact problem caused by dynamic scroll plate radial, circumferential mass center deviation, improve compressor operating stability and component life.

Description

Technical Field

[0001] This utility model relates to the field of scroll compressor technology, specifically to a static balance design structure for the dynamic scroll plate of a scroll compressor. Technical Background Scroll compressors achieve gas compression through the meshing motion of a moving scroll and a stationary scroll. However, the scroll profile of the moving scroll is not centrally symmetrical. After the scroll teeth are modeled and machined, there will inevitably be a deviation between the overall center of mass of the moving scroll and its central position. When the compressor runs at high speed, the inertial force generated by the imbalance of the center of mass will cause the moving scroll to vibrate, impacting the bearing connected to the eccentric shaft. This results in uneven bearing stress, significantly shortening the bearing's service life, and may even cause scroll collision failure.

[0002] Currently, the axial mass deviation of a moving scroll disk can be offset by dynamic balancing design, but the interference from radial and circumferential mass deviations remains difficult to resolve effectively. To conveniently and quickly offset the radial and circumferential mass deviation interference of the moving scroll disk, a static balancing design structure for the radial and circumferential directions of the moving scroll disk is urgently needed. Utility Model Content

[0003] This invention provides a static balance design structure for the moving scroll plate of a scroll compressor, which solves the vibration and bearing impact problems caused by radial and circumferential centroid deviations of the moving scroll plate, bringing the centroid coordinates to zero and improving the operating stability and component life of the compressor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A static balance design structure for a scroll compressor's moving scroll disk includes scroll teeth (1), an end plate (2), a keyway (3), and a bearing housing (4). The end plate (2) has a balance notch (5); the center of the balance notch (5) is a point. O 3, point O 3 is located at the center of the end plate O 1 and centroid offset point O The intersection of the extension line of line 2 and the outer diameter of end plate (2) is located at the point where the balance notch (5) is used to make the centroid coordinates of the moving vortex disk in the radial and circumferential directions return to zero.

[0005] Furthermore, the centroid offset point O The coordinates of 2 are obtained by evaluating the mass properties of the moving vortex disk model using modeling software. The coordinates are the center of mass of the moving vortex disk when no balance notch (5) is set, located in the plane where the end plate (2) is located. xy The projection point on the plane.

[0006] Furthermore, the cutting depth of the balancing notch (5) is adapted to the thickness of the end plate (2).

[0007] Furthermore, by adjusting the radius of the balance gap (5), the moving vortex disk is made to... x , y The centroid coordinates of the direction are set to zero.

[0008] The innovative point of this utility model is: By cutting balance notches at specific positions on the end plate and adjusting the mass distribution of the moving scroll, the radial and circumferential centroid coordinates of the moving scroll can be easily and quickly returned to zero. This effectively reduces vibration during compressor operation, prevents uneven stress on the bearings due to inertial impact, extends the service life of the bearings and scroll, and improves the operational stability of the scroll compressor. Attached Figure Description

[0009] Figure 1 A three-dimensional structural diagram of the dynamic scroll disk before static balancing. Figure 2 A schematic diagram of the end plate during static balancing of a moving scroll plate; Figure 3 A schematic diagram of the three-dimensional structure of the moving scroll disk after static balancing. The markings in the diagram are: 1. Scroll tooth, 2. End plate, 3. Keyway, 4. Bearing housing, 5. Balance notch. O 1. End plate center O 2. Centroid offset point O 3. The center of the balance gap. Detailed Implementation

[0010] To make the purpose, features, and implementation scheme of this utility model clearer, the utility model will be further described below with reference to the accompanying drawings and embodiments.

[0011] like Figure 1-3 As shown, a static balance design structure for a scroll compressor includes scroll teeth (1), end plate (2), keyway (3) and bearing seat (4), with a balance notch (5) on the end plate (2).

[0012] Step 1: Obtain the centroid offset data. After the moving scroll disk is modeled, use the mass attribute evaluation function of the modeling software (such as UG, SolidWorks, etc.) to automatically calculate the mass attributes of the model and obtain the centroid offset data of the moving scroll disk. x , y , z The offset in direction. For a completed moving scroll disk, the center of mass can be measured using a center-of-mass measuring instrument. x , y , z The offset in direction. The origin of the coordinate system is the center of the base circle of the vortex-shaped line. O 1, x , y The direction is the reference direction for the tooth correction of the scroll compressor.z The direction is opposite to the stretching direction of the vortex tooth (1) along the axial direction. At this time, the presence of the keyway (3) on the vortex tooth (1) and the end plate (2) makes the coordinates of the centroid of the moving vortex disk ( ) ( ) x 1, y 1, z 1) (In the example) x 1 = 0.95 y 1 = -2.25 z 1 = 1.14).

[0013] Step 2: Determine the location and shape of the balance notch. Using the center of the end plate as an example. O 1 is the origin of the coordinate system, and the outer surface of the end plate (2) of the moving vortex disk is... xy Plane, connection O 1 and O 2. Extend the line so that the outer diameter of the linear alternating scroll disk is at point 2. O 3; with O 3. A balance notch (5) is formed by cutting the center of the circle. The mass distribution of the end plate (2) is adjusted by adjusting the radius of the balance notch (5) and the cutting thickness.

[0014] Step 3: Verify the static balancing effect. After the above static balancing process, the mass properties of the moving scroll disk are evaluated again using modeling software. The center of mass is located at... x , y The coordinates of the direction can be zeroed (in the example, the centroid coordinates are (0,0,1.39) after processing), which makes it convenient and quick to achieve the static balance of the moving vortex disk in the radial and circumferential directions.

[0015] In this embodiment, by setting a balance notch (5) on the end plate (2), the mass distribution of the moving scroll disk is adjusted simply and quickly, solving the problem of radial and circumferential centroid deviation, effectively reducing compressor operation vibration and bearing impact, and improving component life and equipment stability.

Claims

1. A static balance design structure for a scroll compressor's moving scroll disk, comprising scroll teeth (1), end plate (2), keyway (3), and bearing housing (4), characterized in that: The end plate (2) is provided with a balancing notch (5); the center of the balancing notch (5) is a point. O 3, point O 3 is located at the center of the end plate O 1. Offset point from the center of mass O The intersection of the extension line of line 2 and the outer diameter of end plate (2) is located at the point where the balance notch (5) is used to make the centroid coordinates of the moving vortex disk in the radial and circumferential directions return to zero.

2. The static balance design structure of the scroll compressor's moving scroll disk according to claim 1, characterized in that: The centroid offset point O The coordinates of 2 are obtained by evaluating the mass properties of the moving vortex disk model using modeling software or by measuring the actual moving vortex disk using a centroid measuring instrument. The centroid of the moving vortex disk without a balance notch (5) is located in the plane of end plate (2). xy The projection point on the plane.

3. The static balance design structure of the scroll compressor's moving scroll disk according to claim 1, characterized in that: The cutting depth of the balance notch (5) is less than the difference between the initial thickness of the end plate (2) and the minimum thickness of the end plate (2) when the strength check is satisfied.

4. The static balance design structure of the scroll compressor's moving scroll disk according to claim 1, characterized in that: The cutting radius of the balance notch (5) is less than the difference between the radius of the end plate (2) and the outer diameter of the bearing seat (4).

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