Automatic adjusting device and adjusting method for compressor rotor balance block, and compressor

Abstract

The application discloses a compressor rotor balance block automatic adjusting device, an adjusting method and a compressor. The balance block automatic adjusting device comprises a balance block which is slidably arranged on the end face of a rotor of the compressor; a driving system which is arranged on the end face of the rotor and comprises an extension mechanism and an electromagnetic induction device, the extension mechanism is connected with the balance block and is used for driving the balance block to extend and retract, the electromagnetic induction device is electrically connected with the extension mechanism; and a detection unit which is used for detecting the running frequency of the compressor and is connected with the driving system. The compressor rotor balance block automatic adjusting device has the advantages that the balance block automatic adjusting device is arranged on the rotor in the compressor, the electromagnetic induction device is arranged, current can be generated by the magnetic field in the compressor to drive the extension mechanism and the balance block to move, the balance block position is adjusted, the balance of the radial unbalanced force during the operation of the compressor is realized, and the vibration of the compressor is improved at different frequencies.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to an automatic adjustment device for compressor rotor balance blocks, an adjustment method, and a compressor. Background Technology

[0002] An air conditioner's outdoor unit mainly has two sources of vibration: the fan and its drive motor, and the compressor. For example... Figure 1 As shown, the main structure of the compressor is: an outer casing 1, internally composed of a motor drive unit and a pump compression unit. The motor drive unit consists of a stator assembly 2 and a rotor assembly 3. The rotor assembly 3 is interference-fitted with the pump crankshaft 4, and the stator assembly 2 is interference-fitted with the inner wall of the casing 1. The outer casing is welded to the liquid receiver 5. The compressor vibration is mainly caused by two factors: First, the pump body inside the compressor needs to absorb and compress the refrigerant, therefore the crankshaft is designed with an eccentric shaft structure. When the crankshaft rotates at high speed, it generates a radial unbalanced force. Therefore, a main balancing block 6 and a secondary balancing block 7 need to be designed on the rotor assembly to balance the radial unbalanced force (radial: in top view, the direction away from the crankshaft center axis is the radial direction; this radial unbalanced force is caused by the centrifugal force generated by the eccentric rotation). Figure 1 (The arrow indicates the radial unbalanced force). Two balance weights can balance the radial unbalanced force caused by the eccentric rotation of the crankshaft. Secondly, due to errors and tolerances in component manufacturing and assembly, some compressors may still experience abnormal vibration at high speeds. This leads to large radial vibrations in the compressor body, causing pipe vibration, noise problems, and even pipe cracking. As the compressor frequency increases, the rotational speed also increases, thus increasing the radial unbalanced force generated by centrifugal force on the rotor balance weights and the eccentric crankshaft. Therefore, at high frequencies, compressor vibration may worsen, causing significant vibrations in the air conditioning pipes. Summary of the Invention

[0003] In view of the problem that compressor vibration deteriorates when the compressor operates at high frequency in the prior art, causing large-scale vibration of the air conditioning pipeline, the present invention provides an automatic adjustment device, adjustment method and compressor rotor balance block for compressor. The position of the rotor balance block is adjustable, ensuring that the balance block achieves different degrees of radial unbalanced force balancing effect at different frequencies, so as to effectively control the compressor vibration.

[0004] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0005] An automatic adjustment device for compressor rotor balance weights, comprising:

[0006] The balance block is slidably mounted on the end face of the compressor rotor;

[0007] The drive system, located on the end face of the rotor, includes a telescopic mechanism and an electromagnetic induction device. The telescopic mechanism is connected to the balance block and is used to drive the balance block to telescopically move. The electromagnetic induction device is electrically connected to the telescopic mechanism.

[0008] The detection unit is used to detect the operating frequency of the compressor;

[0009] The control system is connected to both the detection unit and the drive system.

[0010] The control system is pre-set with multiple compressor frequency bands and corresponding balance block positions;

[0011] The control system is used to determine the operating frequency of the compressor based on the detection unit, and to control the balance block to move to the corresponding position according to the frequency range corresponding to the operating frequency of the compressor.

[0012] Furthermore, the detection unit includes a current detection device, which is used to detect the magnitude of the current generated by the electromagnetic induction device.

[0013] Furthermore, the detection unit includes an angular velocity sensor for detecting the angular velocity of the rotor.

[0014] Furthermore, the telescopic mechanism includes a telescopic motor, the telescopic shaft of which is connected to the balance block.

[0015] Furthermore, the electromagnetic induction device includes an induction module and a rectifier module, wherein the induction module includes a plurality of vertically arranged and parallel copper wires.

[0016] Furthermore, it also includes an amplitude detection device for detecting the amplitude of the compressor.

[0017] Furthermore, the amplitude detection device is an amplitude sensor, which is mounted on the telescopic motor.

[0018] The present invention also includes a compressor comprising the above-described compressor rotor balance block automatic adjustment device.

[0019] The present invention also includes an automatic adjustment method for compressor rotor balance blocks, comprising the above-mentioned automatic adjustment device for compressor rotor balance blocks, wherein the adjustment method comprises:

[0020] The compressor vibration was tested at different positions of the balance block under multiple compressor frequency ranges. When the compressor vibration was at its minimum amplitude, the position of the balance block corresponding to different compressor frequency ranges was obtained.

[0021] The system presets the frequency ranges of the multiple compressors and the corresponding positions of the balance blocks;

[0022] The operating frequency of the compressor is determined based on the detection unit;

[0023] The balance block is controlled to move to the corresponding position according to the frequency range corresponding to the compressor's operating frequency.

[0024] The present invention also includes an automatic adjustment method for compressor rotor balance blocks, comprising the above-mentioned automatic adjustment device for compressor rotor balance blocks, wherein the adjustment method comprises:

[0025] The balance block is controlled to move to different positions in sequence, while the amplitude of the compressor is detected when the balance block is in different positions;

[0026] Compare the compressor amplitude when the balance block is in different positions;

[0027] When the compressor's minimum amplitude is less than a preset threshold, the control balance block moves to the position corresponding to the minimum amplitude.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are:

[0029] The aforementioned compressor rotor balance block automatic adjustment device is installed on the rotor inside the compressor. By setting up an electromagnetic induction device, the current generated by the magnetic field inside the compressor drives the telescopic mechanism and the balance block to move. By adjusting the position of the balance block, the radial unbalanced force during compressor operation is balanced, thereby improving compressor vibration at different frequencies.

[0030] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal structure of an existing compressor;

[0033] Figure 2 This is a schematic diagram of the internal structure of the compressor in Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the automatic adjustment device for the compressor rotor balance block in Embodiment 1 of the present invention. Figure 1 The diagram shows the counterweight in the extended state;

[0035] Figure 4 This is a schematic diagram of the automatic adjustment device for the compressor rotor balance block in Embodiment 1 of the present invention. Figure 2 The diagram shows the counterweight in its retracted state.

[0036] Figure 5 This is a schematic diagram of the electromagnetic induction device in Embodiment 1 of the present invention;

[0037] Figure 6 This is a schematic diagram of the automatic adjustment device for the compressor rotor balance block in Embodiment 2;

[0038] Figure 7 This is a schematic diagram of the automatic adjustment device for the compressor rotor balance block in Embodiment 3;

[0039] Explanation of reference numerals in the attached figures:

[0040] 100 for the outer casing;

[0041] Stator 200;

[0042] Rotor 300;

[0043] Main balance weight 400;

[0044] 500-type automatic rotor balance block adjustment device;

[0045] Balance block 510;

[0046] Drive system 520; Electromagnetic induction device 521; Telescopic mechanism 522;

[0047] Angular velocity detection device 530;

[0048] Amplitude detection device 540. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Example 1

[0053] Reference Figures 2-5 This is one embodiment of the compressor rotor balance block automatic adjustment device 500 of the present invention, which is applied to a compressor. The compressor includes a housing 100 and an internal motor drive unit and a pump compression unit. The motor drive unit consists of a stator 200 and a rotor 300. The rotor 300 is interference-fitted with the pump crankshaft, and the stator 200 is interference-fitted with the inner wall of the housing. The housing 100 is welded to a liquid receiver. A main balance block 400 is provided on the lower end face of the rotor 300. The compressor rotor balance block automatic adjustment device 500 is provided on the upper end face of the rotor 300.

[0054] The compressor rotor balance block automatic adjustment device 500 includes a balance block 510, a drive system 520, and a detection unit.

[0055] The balance block 510 is slidably mounted on the end face of the compressor rotor 300.

[0056] The drive system 520 is disposed on the end face of the rotor 300 and includes a telescopic mechanism 522 and an electromagnetic induction device 521. The telescopic mechanism 522 is connected to the balance block 510 and is used to drive the balance block 510 to telescopically move. The electromagnetic induction device 521 is electrically connected to the telescopic mechanism 522. The electromagnetic induction device 521 can generate a drive current by cutting the magnetic field (the magnetic field generated inside the compressor after startup), which can provide power to the telescopic mechanism 522 after rectification.

[0057] In this embodiment, the telescopic mechanism 522 includes a telescopic motor, and the telescopic shaft of the telescopic motor is connected to the balance block 510.

[0058] The electromagnetic induction device 521 includes an induction module and a rectifier module, such as Figure 5 As shown, the sensing module includes several vertically arranged and parallel copper wires. When the rotor 300... Figure 5 When rotated clockwise, the electromagnetic induction device 521 rotates together with the rotor 300. Several vertical copper wires cut the magnetic field generated by the stator 200 winding, thereby generating a current from top to bottom (view from above). The current is collected and then enters the rectifier module to generate usable current.

[0059] The detection unit is used to detect the compressor's operating frequency and is connected to the drive system 520. Although the air conditioning system can detect the compressor frequency, because the rotor 300 inside the compressor rotates at high speed and is affected by a magnetic field, signals cannot be transmitted to the automatic adjustment device of the balance block 510 on the rotor 300 via wired connection or wireless signal transmission. Therefore, a detection unit is set up to detect the compressor's operating frequency. The drive system 520 controls the extension and retraction of the balance block 510 based on the compressor's operating frequency detected by the detection unit.

[0060] The detection unit includes a current detection device, which detects the magnitude of the current generated by the electromagnetic induction device 521. Since the magnitude of the current generated by electromagnetic induction varies at different speeds, the approximate operating frequency range of the compressor can be determined by monitoring the current value. Based on the compressor operating frequency determined by the system, the telescopic mechanism 522 drives the balance block 510 to a set position, ensuring that the balance block 510 achieves different degrees of radial unbalanced force balancing at different frequencies, thereby effectively controlling compressor vibration.

[0061] The automatic adjustment method for the compressor rotor balance block in this embodiment specifically includes:

[0062] S101, Test the compressor vibration when the balance block is located at different positions under multiple compressor frequency ranges. When the compressor vibration is at its minimum amplitude, obtain the balance block position corresponding to different compressor frequency ranges.

[0063] S102, the control system presets the frequency ranges of the multiple compressors and the corresponding positions of the balance blocks;

[0064] S103, determine the compressor's operating frequency based on the current value detected by the detection unit;

[0065] S104 controls the balance block to move to the corresponding position according to the frequency range corresponding to the compressor's operating frequency.

[0066] In step S101, for example, the compressor frequency range can be divided into three frequency ranges: 0Hz~40Hz, 40Hz~90Hz, and above 90Hz. Each of these three frequency ranges corresponds to a different current value B. When the compressor vibration is at its minimum amplitude, the counterweight positions corresponding to the three frequency ranges are P1, P2, and P3, respectively. The current values ​​corresponding to the three frequency ranges and the corresponding counterweight positions are preset into the system.

[0067] In step S104, for example:

[0068] When the current value B = 0.5~0.6F, the corresponding compressor frequency F = 0Hz~40Hz, the system controls the counterweight to move to position P1.

[0069] When the current value B = 0.6~0.7F, the corresponding compressor frequency F = 40Hz~90Hz, the system controls the counterweight to move to position P2.

[0070] When the current value B > 0.7F, the corresponding compressor frequency F > 90Hz, the system controls the counterweight to move to position P3.

[0071] The automatic adjustment device for compressor rotor balance blocks of the present invention is provided on the rotor inside the compressor. By setting an electromagnetic induction device, a current is generated by the magnetic field inside the compressor to drive the telescopic mechanism and the balance block to move. By adjusting the position of the balance block, the radial unbalanced force during compressor operation is balanced, thereby improving compressor vibration at different frequencies. Example 2

[0072] Reference Figure 6 This is a second embodiment of the automatic adjustment device 500 for the compressor rotor balance block of the present invention.

[0073] The compressor rotor balance block automatic adjustment device 500 includes a balance block 510, a drive system 520, and a detection unit.

[0074] The balance block 510 is slidably mounted on the end face of the compressor rotor 300.

[0075] The drive system 520 is disposed on the end face of the rotor 300 and includes a telescopic mechanism 522 and an electromagnetic induction device 521. The telescopic mechanism 522 is connected to the balance block 510 and is used to drive the balance block 510 to telescopically move. The electromagnetic induction device 521 is electrically connected to the telescopic mechanism 522. The electromagnetic induction device 521 can generate a drive current by cutting the magnetic field (the magnetic field generated inside the compressor after startup), which can provide power to the telescopic mechanism 522 after rectification.

[0076] In this embodiment, the telescopic mechanism 522 includes a telescopic motor, and the telescopic shaft of the telescopic motor is connected to the balance block 510.

[0077] The electromagnetic induction device 521 includes an induction module and a rectifier module. The induction module includes several vertically arranged and parallel copper wires. When the rotor 300 rotates clockwise as shown in the figure, the electromagnetic induction device 521 rotates together with the rotor 300. The several vertical copper wires cut the magnetic field generated by the stator winding, thereby generating a current from top to bottom (view from above). The current is collected and then enters the rectifier module to generate a usable current.

[0078] The detection unit is used to detect the operating frequency of the compressor, and the detection unit is connected to the drive system 520. The drive system 520 controls the extension and retraction of the balance block 510 according to the operating frequency of the compressor detected by the detection unit.

[0079] The detection unit includes an angular velocity detection device 530, which is an angular velocity sensor used to detect the angular velocity of the rotor 300. Based on the real-time angular velocity data detected by the angular velocity sensor, the current operating frequency of the compressor is calculated (angular velocity ω = 2*π*F, where F is the frequency). The telescopic motor drives the balance block 510 to a set position, ensuring that the balance block 510 achieves different degrees of radial unbalanced force balancing at different frequencies, thereby effectively controlling the compressor vibration.

[0080] The automatic adjustment method for the compressor rotor balance block in this embodiment specifically includes:

[0081] S201, Test the compressor vibration when the balance block is located at different positions under multiple compressor frequency ranges. When the compressor vibration is at its minimum amplitude, obtain the balance block position corresponding to different compressor frequency ranges.

[0082] S202, the system presets the frequency bands of the multiple compressors and the corresponding positions of the balance blocks;

[0083] S203, determine the compressor's operating frequency based on the rotor's angular velocity detected by the detection unit;

[0084] S204 controls the balance block to move to the corresponding position according to the frequency range corresponding to the compressor's operating frequency.

[0085] In step S101, for example, the compressor frequency range can be divided into three frequency ranges: 0Hz~40Hz, 40Hz~90Hz, and above 90Hz. When the compressor vibration is at its minimum amplitude, the counterweight positions corresponding to the three frequency ranges are positions P1, P2, and P3, respectively. The three frequency ranges and their corresponding counterweight positions are preset in the system.

[0086] In step S203, the angular velocity of the rotor is ω, and the compressor frequency F is calculated by ω=2*π*F (F is the compressor frequency).

[0087] In step S204, for example:

[0088] When the compressor frequency F = 0Hz~40Hz, the system controls the counterweight to move to position P1.

[0089] When the compressor frequency F = 40Hz~90Hz, the system controls the counterweight to move to position P2.

[0090] When the compressor frequency F > 90Hz, the system controls the counterweight to move to position P3. Example 3

[0091] Reference Figure 7 This is a third embodiment of the automatic adjustment device 500 for the compressor rotor balance block of the present invention.

[0092] The compressor rotor balance block automatic adjustment device 500 includes a balance block 510, a drive system 520, a detection unit, and an amplitude detection device 540.

[0093] The balance block 510 is slidably mounted on the end face of the compressor rotor 300.

[0094] The drive system 520 is disposed on the end face of the rotor 300 and includes a telescopic mechanism 522 and an electromagnetic induction device 521. The telescopic mechanism 522 is connected to the balance block 510 and is used to drive the balance block 510 to telescopically move. The electromagnetic induction device 521 is electrically connected to the telescopic mechanism 522. The electromagnetic induction device 521 can generate a drive current by cutting the magnetic field (the magnetic field generated inside the compressor after startup), which can provide power to the telescopic mechanism 522 after rectification.

[0095] In this embodiment, the telescopic mechanism 522 includes a telescopic motor, and the telescopic shaft of the telescopic motor is connected to the balance block 510.

[0096] The electromagnetic induction device 521 includes an induction module and a rectifier module. The induction module includes several vertically arranged and parallel copper wires. When the rotor 300 rotates clockwise as shown in the figure, the electromagnetic induction device 521 rotates together with the rotor 300. The several vertical copper wires cut the magnetic field generated by the stator 200 winding, thereby generating a current from top to bottom (view from above). The current is collected and then enters the rectifier module to generate a usable current.

[0097] The detection unit is used to detect the operating frequency of the compressor, and the detection unit is connected to the drive system 520. The drive system 520 controls the extension and retraction of the balance block 510 according to the operating frequency of the compressor detected by the detection unit.

[0098] The amplitude detection device 540 is used to detect the amplitude of the compressor. In this embodiment, the amplitude detection device 540 is an amplitude sensor, which is mounted on the telescopic motor.

[0099] The automatic adjustment method for the compressor rotor balance block in this embodiment specifically includes:

[0100] S301, control the balance block to move to different positions in sequence, and at the same time detect the amplitude of the compressor when the balance block is in different positions;

[0101] S302, compare the amplitude of the compressor when the balance block is in different positions;

[0102] S303: When the minimum amplitude of the compressor is less than the preset threshold, control the balance block to move to the position corresponding to the minimum amplitude.

[0103] In step S301, for example, the position of the counterweight can be divided into positions P1, P2, P3...Pn, and the amplitudes of the pipes corresponding to positions P1, P2, P3...Pn are amplitudes D1, D2, D3...Dn, respectively.

[0104] In step S202, after all position measurements are completed, the magnitudes of each D1, D2, D3...Dn are compared to determine the minimum amplitude Dmin of the pipeline. The preset threshold is A.

[0105] When Dmin > A, the compressor skips the current frequency.

[0106] When Dmin < A, the counterweight moves to the position P corresponding to Dmin.

[0107] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. An automatic adjustment device for compressor rotor balance weights, characterized in that, include: The balance block is slidably mounted on the end face of the compressor rotor; A drive system, disposed on the end face of the rotor, includes a telescopic mechanism and an electromagnetic induction device. The telescopic mechanism is connected to the balance block and is used to drive the balance block to telescopically move. The telescopic mechanism includes a telescopic motor, and the telescopic shaft of the telescopic motor is connected to the balance block. The electromagnetic induction device is electrically connected to the telescopic mechanism. The detection unit is used to detect the operating frequency of the compressor. The control system is connected to both the detection unit and the drive system. The control system is pre-set with multiple compressor frequency bands and corresponding balance block positions; The control system is used to determine the operating frequency of the compressor based on the detection unit, and to control the balance block to move to the corresponding position according to the frequency range corresponding to the operating frequency of the compressor.

2. The automatic adjustment device for compressor rotor balance blocks according to claim 1, characterized in that, The detection unit includes a current detection device, which is used to detect the magnitude of the current generated by the electromagnetic induction device.

3. The automatic adjustment device for compressor rotor balance blocks according to claim 1, characterized in that, The detection unit includes an angular velocity detection device, which is used to detect the angular velocity of the rotor.

4. The automatic adjustment device for compressor rotor balance blocks according to claim 1, characterized in that, The electromagnetic induction device includes an induction module and a rectifier module. The induction module includes several vertically arranged and parallel copper wires.

5. The automatic adjustment device for compressor rotor balance blocks according to claim 1, characterized in that, It also includes an amplitude detection device for detecting the amplitude of the compressor.

6. The automatic adjustment device for compressor rotor balance blocks according to claim 5, characterized in that, The amplitude detection device is an amplitude sensor, which is mounted on a telescopic motor.

7. A compressor, characterized in that, Includes the compressor rotor balance block automatic adjustment device as described in any one of claims 1-6.

8. A method for automatically adjusting the rotor balance weight of a compressor, characterized in that, Including the compressor rotor balance block automatic adjustment device as described in claim 1, the adjustment method includes: The compressor vibration was tested at different positions of the balance block under multiple compressor frequency ranges. When the compressor vibration was at its minimum amplitude, the position of the balance block corresponding to different compressor frequency ranges was obtained. The control system presets the multiple compressor frequency bands and the corresponding positions of the balance blocks; The operating frequency of the compressor is determined based on the detection unit; The balance block is controlled to move to the corresponding position according to the frequency range corresponding to the compressor's operating frequency.

9. A method for automatically adjusting the rotor balance block of a compressor, characterized in that, Including the compressor rotor balance block automatic adjustment device as described in claim 5, the adjustment method includes: The balance block is controlled to move to different positions in sequence, while the amplitude of the compressor is detected when the balance block is in different positions; Compare the compressor amplitude when the balance block is in different positions; When the compressor's minimum amplitude is less than a preset threshold, the control balance block moves to the position corresponding to the minimum amplitude.

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