Protective device for separation of combined part and compressor

Abstract

The invention relates to a protection device for separation of a combined part and a compressor. The protection device for separation of the combined part comprises a first part and a second part, a second member; the connecting piece is sequentially connected with the first component and the second component; and the air bag is arranged on the first component and surrounds the connecting piece, and the air bag is configured to expand in response to separation of the first component and the second component and wrap the connecting piece. Due to the fact that the connecting piece is loosened, the first component is separated from the second component, the air bag is expanded in response to the separation of the first component and the second component, the connecting piece is wrapped in the air bag, the connecting piece is prevented from colliding with other components after falling off, and then potential safety hazards are prevented.

Description

Technical Field

[0001] The present disclosure relates to the field of protective warning equipment, and in particular to a protective device and a compressor for separating a combined component. Background Art

[0002] In some related technologies, a semi-enclosed screw compressor includes a cantilever, the end of the cantilever is limited by a gland to limit the axial movement of the motor, and the gland is fastened by bolts on the axis. During use, there is a problem that the gland may fall off and hit the compressor motor winding, causing the motor to burn out. Summary of the invention

[0003] Some embodiments of the present disclosure provide a protective device for detachment of a combined component and a compressor, which are used to reduce collision damage to other components after the detachment of the combined component.

[0004] In one aspect of the present disclosure, there is provided a protective device for disengagement of a combined component, comprising:

[0005] first component;

[0006] The second component;

[0007] a connecting member, connecting the first component and the second component in sequence; and

[0008] An airbag is provided on the first component and is disposed around the connecting member. The airbag is configured to expand in response to the separation of the first component and the second component and to cover the connecting member.

[0009] In some embodiments, the protective device for the combination component to be detached further comprises:

[0010] A third component is arranged in a direction where the first component is away from the second component; and

[0011] The first switch is provided on the third component, and the first switch is configured to send out a warning signal when being pushed by the expansion of the airbag.

[0012] In some embodiments, the protective device for disengagement of the combined component also includes a controller, which is electrically connected to the second component and the first switch, and is configured to control the movement of the second component and control the second component to stop moving after receiving a warning signal from the first switch.

[0013] In some embodiments, an annular groove is provided on the first component around the position where the connecting member is inserted, and the airbag is arranged in the annular groove.

[0014] In some embodiments, the protective device for the detachment of the combined components further comprises a piezoelectric trigger, which is squeezed and disposed between the connecting member and the first component, and the piezoelectric trigger is configured to send a signal to control the expansion of the airbag in response to the detachment of the first component from the second component.

[0015] In some embodiments, a first hole is disposed on the first component, a portion of the piezoelectric trigger is disposed in the first hole, and another portion of the piezoelectric trigger is located outside the first hole.

[0016] In some embodiments, the protective device for detachment of the combined components also includes a second switch, which is connected in series to the control circuit where the piezoelectric trigger and the airbag are located, and the second switch is configured to cut off the control circuit during the process of the connecting member squeezing the piezoelectric trigger to connect the first component and the second component, and the second switch is configured to connect the control circuit in response to the detachment of the first component and the second component and before the piezoelectric trigger sends a signal.

[0017] In some embodiments, the second switch is squeezed and disposed between the connecting member and the first component, and the second switch is configured to be squeezed by the connecting member synchronously with the piezoelectric trigger after the connecting member squeezes the piezoelectric trigger to reach a first stroke.

[0018] In some embodiments, the second switch is configured to be squeezed by the connecting member synchronously with the piezoelectric trigger, and after the piezoelectric trigger is squeezed to reach a second stroke, the second switch cuts off the control circuit.

[0019] In some embodiments, the piezoelectric trigger is configured to complete energy storage after the second switch cuts off the control circuit and is squeezed by the connecting member to reach a third stroke; the connecting member is configured to complete the connection between the first component and the second component after the piezoelectric trigger completes energy storage.

[0020] In some embodiments, the first stroke is one third of the total stroke required for the piezoelectric trigger to complete energy storage, the second stroke is one third of the total stroke required for the piezoelectric trigger to complete energy storage, and the third stroke is one third of the total stroke required for the piezoelectric trigger to complete energy storage.

[0021] In some embodiments, a second hole is disposed on the first component, a portion of the second switch is disposed in the second hole, and another portion of the second switch is located outside the second hole.

[0022] In some embodiments, a first hole is provided on the first component, a portion of the piezoelectric trigger is provided in the first hole, and another portion of the piezoelectric trigger is located outside the first hole; a portion of the piezoelectric trigger located outside the first hole abuts against the connecting member first relative to a portion of the second switch located outside the first hole.

[0023] In some embodiments, a cover plate is provided on a side of the airbag away from the first component, and the cover plate is configured to abut against a panel of the first switch after the airbag is inflated.

[0024] In one aspect of the present disclosure, a compressor is provided, comprising the above-mentioned protective device for disengaging a combined component, wherein the first component is a gland of the compressor, and the second component is a rotating shaft of the compressor.

[0025] In some embodiments, the protective device for detaching the combined component further comprises:

[0026] A third component is arranged in a direction where the gland is away from the rotating shaft, and the third component is an air intake filter of the compressor; and

[0027] The first switch is arranged on the air intake filter, and the first switch is configured to send out a warning signal when being pushed by the airbag.

[0028] Based on the above technical solution, the present disclosure has at least the following beneficial effects:

[0029] In some embodiments, the protective device for the separation of the combined components includes a first component, a second component, a connector and an airbag. The connector sequentially connects the first component and the second component. The airbag is provided on the first component and is arranged around the connector. The airbag is configured to expand in response to the separation of the first component from the second component and to cover the connector. Since the connector is loose, the separation of the first component from the second component may occur. The airbag expands in response to the separation of the first component from the second component, and covers the connector in the airbag, so as to prevent the connector from colliding with other components after falling off, thereby preventing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0031] Figure 1 A schematic diagram of the structure of a protective device for disengaging a combined component according to some embodiments of the present disclosure;

[0032] Figure 2A schematic diagram of a piezoelectric trigger and a second switch not being compressed according to some embodiments of the present disclosure;

[0033] Figure 3 It is a schematic diagram of a protective device with detached combined components provided according to some embodiments of the present disclosure in an airbag inflated state.

[0034] The reference numerals in the accompanying drawings are described as follows:

[0035] 1-first component; 1a-pressure cover; 2-second component; 2a-rotating shaft; 3-connecting piece; 4-airbag; 5-third component; 5a-filter; 6-first switch; 7-piezoelectric trigger; 8-second switch; 9-cover plate; 10-gasket.

[0036] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0038] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0040] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0042] Figure 1 Schematic diagram of the structure of some embodiments of the protective device according to the present disclosure. Figure 1 In some embodiments, the protective device for detaching a combined component includes a first component 1 , a second component 2 , a connecting member 3 and an airbag 4 .

[0043] The connecting member 3 connects the first component 1 and the second component 2 in sequence.

[0044] The airbag 4 is provided on the first component 1 and is arranged around the connecting member 3. The airbag 4 is configured to expand in response to the separation of the first component 1 and the second component 2, and to cover the connecting member 3 (refer to Figure 3 ).

[0045] In the above embodiment, the connector 3 is loose, which may cause the first component 1 to separate from the second component 2. The airbag 4 expands in response to the separation of the first component 1 and the second component 2, and covers the connector 3 in the airbag 4, preventing the connector 3 from colliding with other components after falling off, thereby preventing potential safety hazards.

[0046] In some embodiments, the connecting member 3 comprises a bolt, which connects the first component 1 and the second component 2 in sequence.

[0047] In some embodiments, the first component 1 may be a gland 1a of a compressor, the second component 2 may be a rotating shaft 2a of the compressor, and the connecting member 3 connects the gland 1a and the rotating shaft 2a.

[0048] When the connecting member 3 is loose and the pressure cover 1a and the rotating shaft 2a are separated, the airbag 4 expands in response to the separation of the pressure cover 1a and the rotating shaft 2a, and the connecting member 3 is covered in the airbag 4, which can prevent the connecting member 3 from colliding with the motor winding in the compressor after falling off, causing damage to the motor, thereby preventing safety hazards.

[0049] In some embodiments, the protective device for the combination component disengagement further includes a third component 5 and a first switch 6 .

[0050] The third component 5 is arranged in a direction where the first component 1 is away from the second component 2 .

[0051] The first switch 6 is disposed on the third component 5 , and the first switch 6 is configured to send out a warning signal when being pushed by the inflated airbag 4 .

[0052] In the above embodiment, the first switch 6 is in a normally open state. The airbag 4 expands and pushes the first switch 6, so that the first switch 6 is in a closed state, and the first switch 6 sends out a warning signal.

[0053] In the above embodiment, the connecting member 3 is loose, the first component 1 is separated from the second component 2, the airbag 4 expands and pushes the first switch 6, and the first switch 6 sends out a warning signal to remind the relevant personnel that there is a problem of separation between the first component 1 and the second component 2, which plays a warning role and can remind the relevant personnel to stop the equipment operation and repair the fault.

[0054] Furthermore, the airbag 4 expands and pushes the first switch 6 on the third component 5, so that the airbag 4 and the first component 1 are limited between the third component 5 and the second component 2, preventing the first component 1 from being separated and causing collision damage to other components.

[0055] In some embodiments, the third component 5 is an air intake filter 5a of the compressor, the air intake filter 5a is arranged at the air intake end of the compressor, the rotating shaft 2a and the air intake filter 5a are arranged axially spaced, and the gland 1a is arranged at the end of the rotating shaft 2a adjacent to the air intake filter 5a. When the connector 3 is loose and the gland 1a and the rotating shaft 2a are separated, the airbag 4 expands and pushes the first switch 6, so that the first switch 6 is closed and sends out an early warning signal, which can remind the relevant personnel that the gland 1a and the rotating shaft 2a are separated, solves the problem that the gland 1a of the compressor cannot be warned when it falls off, and facilitates after-sales fault inspection and repair of the compressor.

[0056] At the same time, the airbag 4 expands and pushes the first switch 6 on the intake filter 5a. The airbag 4, the connecting piece 3 and the pressure cover 1a are limited between the intake filter 5a and the rotating shaft 2a, which can prevent the pressure cover 1a from detaching from the rotating shaft 2a and causing collision damage to the motor winding.

[0057] In some embodiments, the protective device for disengagement of the combined component also includes a controller, which is electrically connected to the second component 2 and the first switch 6. The controller is configured to control the movement of the second component 2 and control the second component 2 to stop moving after receiving a warning signal from the first switch 6.

[0058] In the above embodiment, the second component 2 is a moving component. Since the first component 1 and the second component 2 are connected by the connecting member 3, during the movement of the second component 2, the first component 1 will move with the second component 2, and the movement and stop of the second component 2 are controlled by the controller.

[0059] The controller is electrically connected to the first switch 6. After receiving the warning signal from the first switch 6, the controller indicates that there is a problem that the connecting piece 3 is loose and the first component 1 is detached from the second component 2. Therefore, in order to prevent the second component 2 from continuing to operate in the event of a fault, the controller controls the second component 2 to stop moving so as to perform fault inspection and avoid the equipment running with a fault and causing safety hazards.

[0060] In some embodiments, the second component 2 includes a rotating shaft 2a of the compressor, and the controller is electrically connected to a power mechanism of the rotating shaft 2a and a first switch 6. The controller is configured to control the movement of the rotating shaft 2a, and to control the rotating shaft 2a to stop rotating after receiving a warning signal from the first switch 6, so as to avoid the compressor from running with a fault and causing a safety hazard.

[0061] In some embodiments, an annular groove is provided on the first component 1 around the position where the connecting member 3 is inserted, and the airbag 4 is arranged in the annular groove.

[0062] In the above embodiment, an annular groove is provided on the first component 1, and the airbag 4 is provided in the annular groove, so that the position of the airbag 4 and the first component 1 can be fixed, and the airbag 4 can be uniformly expanded. After the first component 1 is separated from the second component 2, the airbag 4 will move with the first component 1 to circumferentially cover the connector 3 to improve the protection effect. The airbag 4 provides circumferential protection for the connector 3, which can effectively prevent the connector 3 from being separated from the first component 1 and avoid the connector 3 from causing impact damage to other components.

[0063] The airbag 4 is arranged in the annular groove on the first component 1. After the first component 1 is separated from the second component 2, it can collide and push with the first switch 6 as the first component 1 moves, quickly triggering the first switch 6 to send a warning signal, thereby improving the rapidity, timeliness and accuracy of the warning, avoiding the equipment from running with faults, and improving safety.

[0064] In some embodiments, the protective device for the detachment of the combined components also includes a piezoelectric trigger 7, which is squeezed and arranged between the connecting member 3 and the first component 1, and the piezoelectric trigger 7 is configured to send a signal to control the expansion of the airbag 4 in response to the detachment of the first component 1 and the second component 2.

[0065] In the above embodiment, the piezoelectric trigger 7 can be compressed. When the piezoelectric trigger 7 is compressed, elastic potential energy is stored. When the piezoelectric trigger 7 recovers elastic deformation, electric energy is released. Since the piezoelectric trigger 7 can quickly recover elastic deformation, electric energy can be released in a very short time, and it has fast response. Moreover, the piezoelectric trigger 7 is very sensitive to the compression and release process, and has high sensitivity.

[0066] The piezoelectric trigger 7 is squeezed and arranged between the connecting member 3 and the first component 1, storing elastic potential energy. When the connecting member 3 is loosened and the first component 1 is separated from the second component 2, the squeezing force of the connecting member 3 and the first component 1 on the piezoelectric trigger 7 is reduced, and the piezoelectric trigger 7 restores its deformation to release electrical energy, sending a signal to control the expansion of the airbag 4.

[0067] Since the piezoelectric trigger 7 is squeezed and arranged between the connecting member 3 and the first component 1, it can respond quickly when the connecting member 3 is loose, thereby improving the timeliness and accuracy of early warning and protection, avoiding the safety hazards caused by the separation of the first component 1 and the second component 2, and improving the safety of the equipment.

[0068] In the above embodiment, the piezoelectric trigger 7 sends a signal for controlling the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2, including at least two specific implementations.

[0069] In the first implementation mode, the piezoelectric trigger 7 includes a piezoelectric part and a trigger part. The piezoelectric part sends a signal to control the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2, and releases electric energy. The trigger part receives the signal and electric energy sent by the piezoelectric part, and uses the electric energy to generate an electric spark to cause the pre-installed inflator in the airbag 4 to react, quickly generate a large amount of gas, and make the airbag 4 expand and extend, providing timely protection and early warning.

[0070] In the second implementation, the airbag 4 includes a control component and an ignition component. The control component sends a signal to control the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2. After receiving the signal, the ignition component starts ignition, causing the preset inflator in the airbag 4 to react, quickly generating a large amount of gas, causing the airbag 4 to expand and extend, providing timely protection and early warning.

[0071] In some embodiments, the inflator pre-placed in the airbag 4 includes solid fuel, such as sodium azide (NaN3), etc. A large amount of gas is rapidly generated during the combustion of the inflator, and the gas is usually nitrogen (N2).

[0072] In some embodiments, a first hole is provided on the first component 1, a portion of the piezoelectric trigger 7 is provided in the first hole, and another portion of the piezoelectric trigger 7 is located outside the first hole.

[0073] In the above embodiment, a first hole is provided on the first component 1, and a piezoelectric trigger 7 is provided in the first hole. The structure is simple, and a part of the piezoelectric trigger 7 is provided in the first hole, and another part of the piezoelectric trigger 7 is located outside the first hole. The part of the piezoelectric trigger 7 located outside the first hole can directly contact and abut with the connecting member 3, and the piezoelectric trigger 7 is squeezed and compressed by the connecting member 3 to store energy. When the connecting member 3 is loosened and the squeezing force of the connecting member 3 on the piezoelectric trigger 7 is reduced, the piezoelectric trigger 7 can quickly respond to the changes of the connecting member 3, and has high sensitivity and high reliability.

[0074] In some embodiments, the first hole is located on the inner side of the airbag 4 .

[0075] refer to Figure 2 In some embodiments, the protective device for the detachment of the combined components also includes a second switch 8, which is connected in series to the control circuit where the piezoelectric trigger 7 and the airbag 4 are located. The second switch 8 is configured to cut off the control circuit during the process in which the connecting member 3 squeezes the piezoelectric trigger 7 to connect the first component 1 and the second component 2, and the second switch 8 is configured to connect the control circuit in response to the detachment of the first component 1 and the second component 2 and before the piezoelectric trigger 7 sends a signal.

[0076] In the above embodiment, the second switch 8 can be compressed. When the second switch 8 is pressed, it is in an open state, and the control circuit is disconnected. When the second switch 8 recovers its deformation and springs open, it is in a closed state, and the control circuit is connected.

[0077] The second switch 8 cuts off the control circuit when the connecting member 3 squeezes the piezoelectric trigger 7 to connect the first component 1 and the second component 2, which can prevent the piezoelectric trigger 7 from erroneously operating during squeezing, causing the piezoelectric trigger 7 to recover its deformation and release electrical energy, thereby sending a signal to control the expansion of the airbag 4 and generating a false alarm. The second switch 8 can also connect the control circuit in response to the separation of the first component 1 from the second component 2 and before the piezoelectric trigger 7 sends a signal, so that when the piezoelectric trigger 7 sends a signal, the control circuit forms a loop, and the signal sent by the piezoelectric trigger 7 can be sent to the airbag 4 to expand the airbag 4.

[0078] Therefore, the setting of the second switch 8 can prevent the piezoelectric trigger 7 from sending an erroneous signal for controlling the inflation of the airbag 4 due to malfunction during the process of connecting the first component 1 and the second component 2 by squeezing the piezoelectric trigger 7 through the connecting piece 3, thereby improving the accuracy of the device's protection and early warning.

[0079] In some embodiments, the second switch 8 is squeezed and disposed between the connector 3 and the first component 1 , and the second switch 8 is configured to be squeezed by the connector 3 synchronously with the piezoelectric trigger 7 after the connector 3 squeezes the piezoelectric trigger 7 to reach a first stroke.

[0080] In the above embodiment, when the piezoelectric trigger 7 is squeezed to reach the first stroke and continues to be squeezed, the second switch 8 and the piezoelectric trigger 7 are synchronously squeezed by the connecting member 3, which can relatively accurately feedback the squeezed state of the piezoelectric trigger 7 so as to cut off the control circuit in time and prevent the piezoelectric trigger 7 from storing sufficient elastic potential energy in the subsequent squeezing process, causing the piezoelectric trigger 7 to release electrical energy due to malfunction and send a signal to control the expansion of the airbag 4.

[0081] In some embodiments, the second switch 8 is configured to be squeezed by the connecting member 3 synchronously with the piezoelectric trigger 7, and after the piezoelectric trigger 7 is squeezed to reach the second stroke, the second switch 8 cuts off the control circuit.

[0082] In the above embodiment, after the piezoelectric trigger 7 is squeezed to reach the second stroke, it means that the piezoelectric trigger 7 may store potential energy that can send a signal. Therefore, the squeezing state of the second switch 8 is set so that the second switch 8 is squeezed synchronously with the piezoelectric trigger 7 and cuts off the control circuit after reaching the second stroke of the piezoelectric trigger 7. This can improve the timeliness and accuracy of the control circuit cutoff and prevent erroneous operation from sending out erroneous signals.

[0083] At the same time, in the process of the piezoelectric trigger 7 recovering its deformation, the piezoelectric trigger 7 returns to the starting position of the second stroke, and the second switch 8 can connect the control circuit. When the piezoelectric trigger 7 returns to the starting position of the first stroke (that is, the position where the deformation is fully restored) and sends a signal, it can ensure that the control circuit is connected.

[0084] Therefore, the setting of the second switch 8 can not only prevent the piezoelectric trigger 7 from issuing a false alarm due to malfunction during the process of the connecting member 3 squeezing the first component 1 and the second component 2, but also can timely connect the control circuit during the process of the connecting member 3 loosening and the first component 1 and the second component 2 disengaging, and will not hinder the piezoelectric trigger 7 from sending a signal to control the expansion of the airbag 4.

[0085] In some embodiments, the piezoelectric trigger 7 is configured to complete energy storage after the second switch 8 cuts off the control circuit and is squeezed by the connecting member 3 to reach the third stroke; the connecting member 3 is configured to complete the connection between the first component 1 and the second component 2 after the piezoelectric trigger 7 completes energy storage.

[0086] In the above embodiment, after the piezoelectric trigger 7 is squeezed by the connecting member 3 to reach the second stroke, the second switch 8 cuts off the control circuit. At this time, the piezoelectric trigger 7 continues to be squeezed to enable the piezoelectric trigger 7 to complete energy storage. The total stroke of the piezoelectric trigger 7 is matched with the stroke of the connecting member 3 connecting the first component 1 and the second component 2, so that the connecting member 3 can complete the energy storage of the piezoelectric trigger 7 while completing the connection between the first component 1 and the second component 2. The coordination of the mechanical mechanism and the electronic control is cleverly used to improve the accuracy and sensitivity of the control.

[0087] In some embodiments, the first stroke is one third of the total stroke required for the piezoelectric trigger 7 to complete energy storage, the second stroke is one third of the total stroke required for the piezoelectric trigger 7 to complete energy storage, and the third stroke is one third of the total stroke required for the piezoelectric trigger 7 to complete energy storage.

[0088] In the above embodiment, in order to prevent misoperation, the 1 / 3 stroke segmentation method is adopted to divide the total stroke of the piezoelectric trigger 7 into 3 sections, each section being 1 / 3 of the total stroke of the piezoelectric trigger 7 .

[0089] The first section is the basic stroke. When the connector 3 is pressed downward, the piezoelectric trigger 7 completes the first 1 / 3 of the total stroke, and then it will contact the second switch 8 synchronously. At this time, the connector 3 continues to be pressed downward, which can make the piezoelectric trigger 7 and the second switch 8 press downward synchronously. When the piezoelectric trigger 7 is squeezed to the second 1 / 3 of the total stroke, the second switch 8 begins to disconnect. Since the second switch 8 and the piezoelectric trigger 7 are connected in series on the control circuit, after the piezoelectric trigger 7 is pressed to 2 / 3 of the total stroke, the contact of the second switch 8 begins to separate and cut off the control circuit, ensuring that the piezoelectric trigger 7 can complete energy storage after the last 1 / 3 of the total stroke. When the piezoelectric trigger 7 is completely pressed, the second switch 8 is completely disconnected, the control circuit is disconnected, the electric shock generator 7 is pressed downward, and the energy storage is completed. At this time, the connector 3 can complete the connection between the first component 1 and the second component 2. In other words, the bolts tighten the gland 1a and the shaft 2a.

[0090] In the above embodiment, dividing the stroke of the piezoelectric trigger 7 into three equal parts can more finely control the response of the piezoelectric trigger 7, achieve coordination with the stroke of the second switch 8, ensure that each stroke stage is carried out according to predetermined requirements, enable the second switch 8 to achieve the corresponding effect, and enable the piezoelectric trigger 7 to store or release energy.

[0091] Of course, the 1 / 3 stroke segmentation method is only an optional or preferred method, not the only method. As long as the piezoelectric trigger 7 is squeezed for a certain stroke, the piezoelectric trigger 7 and the second switch 8 are squeezed synchronously, and the second switch 8 cuts off the control circuit before the piezoelectric trigger 7 completes energy storage to prevent malfunction from causing the piezoelectric trigger 7 to send an erroneous signal; the second switch is connected to the control circuit before the piezoelectric trigger 7 releases power and sends a signal, which will not affect the piezoelectric trigger 7 sending an alarm signal.

[0092] In some embodiments, a second hole is disposed on the first component 1 , a portion of the second switch 8 is disposed in the second hole, and another portion of the second switch 8 is located outside the second hole.

[0093] In the above embodiment, a second hole is provided on the first component 1, and a second switch 8 is provided in the second hole. The structure is simple, and a part of the second switch 8 is provided in the second hole, and another part of the second switch 8 is located outside the second hole. The part of the second switch 8 located outside the second hole can directly contact and abut the connecting member 3, and the second switch 8 can be squeezed by the connecting member 3 to cut off the control circuit. When the connecting member 3 is loose and the squeezing force of the connecting member 3 on the second switch 8 is reduced, the second switch 8 can respond quickly to connect the circuit, and has high sensitivity and high reliability.

[0094] In some embodiments, the second hole is located on the inner side of the airbag 4 .

[0095] In some embodiments, the first hole and the second hole are both located on the inner side of the airbag 4 , and the first hole and the second hole are arranged opposite to each other.

[0096] In some embodiments, a first hole is provided on the first component 1, a portion of the piezoelectric trigger 7 is provided in the first hole, and another portion of the piezoelectric trigger 7 is located outside the first hole; the portion of the piezoelectric trigger 7 located outside the first hole first abuts against the connecting member 3 relative to the portion of the second switch 8 located outside the first hole.

[0097] In the above embodiment, both the piezoelectric trigger 7 and the second switch 8 are compressible.

[0098] In some embodiments, when the lengths of the piezoelectric trigger 7 and the second switch 8 are the same, a travel difference can be formed by the height of the installation position, that is, the travel difference between the piezoelectric trigger 7 and the second switch 8 is formed by the depth of the first hole and the second hole. For example, the depth of the first hole is less than the depth of the second hole.

[0099] In other embodiments, the depths of the first hole and the second hole may be made consistent, and the lengths of the piezoelectric trigger 7 and the second switch 8 may be different to form a travel difference between the piezoelectric trigger 7 and the second switch 8. For example, the length of the piezoelectric trigger 7 is made greater than the length of the second switch 8.

[0100] In the above embodiment, the piezoelectric trigger 7 abuts against the connecting member 3 before the second switch 8, and the piezoelectric trigger 7 and the second switch 8 have a travel difference, which is beneficial for the second switch 8 to cut off the control circuit before the piezoelectric trigger 7 completes energy storage, thereby preventing the piezoelectric trigger 7 from sending an erroneous signal due to malfunction; and is beneficial for the second switch 8 to connect the control circuit before the piezoelectric trigger 7 releases electric energy and sends a signal, which will not affect the piezoelectric trigger 7 sending an alarm signal.

[0101] Figure 2 The figure shows the piezoelectric trigger 7 and the second switch 8 in a virtual extended state, and the connecting member 3 is in a compressed position. Actually, after the connecting member 3 is in the compressed position, the piezoelectric trigger 7 and the second switch 8 are compressed back.

[0102] In some embodiments, a cover plate 9 is provided on a side of the airbag 4 away from the first component 1 , and the cover plate 9 is configured to abut against a panel of the first switch 6 after the airbag 4 is inflated.

[0103] In the above embodiment, a cover plate 9 is provided on the airbag 4. After the airbag 4 is inflated, the cover plate 9 abuts against the panel of the first switch 6, which can reduce the friction between the airbag 4 and the panel of the first switch 6 and prevent the airbag 4 from twisting, thereby affecting the stability of the pressure on the first component 1 and causing the first component 1 to fall off from the second component 2.

[0104] In some embodiments, the cover plate 9 is bonded to the airbag 4 .

[0105] In order to prevent the second component 2 from moving and causing the first component 1 and the airbag 4 to move and twist, thereby destroying the stability of the airbag 4, when the airbag 4 pushes against the first switch 6 of the third component 5, the panel of the first switch 6 is made of a metal panel, and the cover plate 9 of the airbag 6 is made of polytetrafluoroethylene. After the airbag 6 is inflated and pushed out, the cover plate 9 fits with the metal panel of the first switch 6. Since the sliding coefficients of the metal panel and the polytetrafluoroethylene cover plate 9 are very small, they can slide and roll briefly, so that the airbag 4 will not be twisted by being rigidly attached to the panel of the first switch 6. This can effectively stabilize the airbag system and prevent the pressure of the airbag 4 from being lost after twisting, and the first component 1 from falling off from the second component 2.

[0106] Some embodiments of the present disclosure further provide a compressor, which includes a protective device for disengagement of the combined components in any of the above embodiments, wherein the first component 1 is a gland 1a of the compressor, and the second component 2 is a rotating shaft 2a of the compressor.

[0107] In some embodiments, the compressor includes a housing, a rotating shaft 2a is axially arranged in the housing, a motor winding is arranged on the outer periphery of the rotating shaft 2a, and a gland 1a is arranged at the end of the rotating shaft 2a. The gland 1a is connected to the rotating shaft 2a through a connecting member 3. Optionally, the connecting member 3 includes a bolt.

[0108] Due to the looseness of the connecting piece 3, there is a risk that the gland 1a will fall off the rotating shaft 2a. After the gland 1a is separated from the rotating shaft 2a and the gland 1a and the connecting piece 3 are separated, the gland 1a and the connecting piece 3 will touch the motor winding, causing a safety hazard. In addition, since there is no warning after the gland 1a falls off, the compressor continues to run, which will cause the gland 1a and the connecting piece 3 to damage the motor and cause compressor failure.

[0109] Based on this, the first component 1 in the protective device for the separation of the combined components is the gland 1a of the compressor, the second component 2 is the rotating shaft 2a of the compressor, and the connecting member 3 connects the gland 1a and the rotating shaft 2a. In the case where the connecting member 3 is loose and the gland 1a and the rotating shaft 2a are separated, the airbag 4 expands in response to the separation of the gland 1a and the rotating shaft 2a, and the connecting member 3 is covered in the airbag 4 to prevent the connecting member 3 from colliding with the motor winding after falling off, causing damage to the motor, and then causing safety hazards.

[0110] In some embodiments, the protective device for the combination component disengagement further includes a third component 5 and a first switch 6 .

[0111] The third component 5 is arranged in the direction where the gland 1a is away from the rotating shaft 2a, and the third component 5 is an air intake filter 5a of the compressor.

[0112] The first switch 6 is provided on the air intake filter 5 a , and is configured to send out a warning signal when the first switch 6 is pushed by the airbag 4 when it is inflated.

[0113] In the above embodiment, the connecting piece 3 is loose, the pressure cover 1a and the rotating shaft 2a are separated, and the airbag 4 expands to push the first switch 6, so that the first switch 6 sends out a warning signal, which can remind the relevant personnel that the pressure cover 1a and the rotating shaft 2a are separated, and play a warning role. It can also remind the relevant personnel to stop the operation of the compressor and repair the fault, which solves the problem that the pressure cover 1a of the compressor cannot be warned when it falls off, and facilitates after-sales fault repair of the compressor.

[0114] Furthermore, the airbag 4 expands and pushes the first switch 6 on the air intake filter 5a, so that the pressure cover 1a can be limited between the air intake filter 5a and the rotating shaft 2a, preventing the pressure cover 1a from being separated and causing collision damage to the motor winding.

[0115] In some embodiments, the suction filter 5a is disposed at the suction end of the compressor, the rotating shaft 2a and the suction filter 5a are spaced apart in the axial direction, and the gland 1a is disposed at the end of the rotating shaft 2a adjacent to the suction filter 5a.

[0116] In some embodiments, the protective device for disengagement of the combined components also includes a controller, which is electrically connected to the power mechanism of the rotating shaft 2a and the first switch 6. The controller is configured to control the movement of the rotating shaft 2a and control the rotating shaft 2a to stop moving after receiving a warning signal from the first switch 6.

[0117] The controller included in the protective device for disengagement of the combined components can be a controller built into the compressor. The controller is electrically connected to the power mechanism of the rotating shaft 2a and the first switch 6. The controller sends a signal to the power mechanism to control the movement of the rotating shaft 2a, and after receiving the early warning signal from the first switch 6, it sends a signal to the power mechanism to control the rotating shaft 2a to stop moving.

[0118] In the above embodiment, after receiving the early warning signal from the first switch 6, the controller indicates that the connecting member 3 is loose and the pressure cover 1a and the rotating shaft 2a are detached. Therefore, the airbag 4 opens and covers the connecting member 3 to prevent the connecting member 3 from colliding with the motor winding and damaging the motor winding. The airbag 4 pushes the first switch 6, and the first switch 6 sends a early warning signal to the controller. In order to prevent the rotating shaft 2a from continuing to run in the event of a fault, the controller controls the rotating shaft 2a to stop moving, thereby protecting the compressor motor winding from secondary damage, and facilitating fault inspection and repair of the compressor to avoid the compressor from running with a fault and causing safety hazards.

[0119] In some embodiments, the connector 3 is axially connected to the gland 1a and the rotating shaft 2a, and an annular groove is provided on the end surface of the gland 1a around the connector 3, and the airbag 4 is installed in the annular groove.

[0120] In some embodiments, a first hole is drilled from the end surface of the gland 1a to the inside of the gland 1a, and the first hole is used to place the piezoelectric trigger 7. The first hole is located on the inner side of the annular groove.

[0121] In some embodiments, a second hole is drilled from the end surface of the gland 1a to the inside of the gland 1a, and the second hole is used to place the second switch 8. The second hole is located on the inner side of the annular groove. Optionally, the second hole is arranged opposite to the first hole.

[0122] In some embodiments, the lengths of the piezoelectric trigger 7 and the second switch 8 are consistent, and the depth of the first hole is less than the depth of the second hole, so that the length of the piezoelectric trigger 7 extending out of the first hole is greater than the length of the second switch 8 extending out of the second hole, and the piezoelectric trigger 7 is squeezed by the connecting member 3 before the second switch 8.

[0123] In some embodiments, the connection member 3 comprises a bolt.

[0124] In some embodiments, a gasket 10 is sleeved on the bolt, and the gasket 10 is located between the head of the bolt and the end face of the pressure cover 1a. When the bolt is pre-tightened, the gasket 10 is pressed, and the gasket 10 presses the piezoelectric trigger 7. When the bolt is loosened, the piezoelectric trigger 7 is triggered, and the piezoelectric trigger 7 causes the inflator in the airbag 4 to react, rapidly expand and generate gas, and the airbag 4 is in an extended state.

[0125] refer to Figure 3After the airbag 4 is extended, the bolts are first protected by being wrapped in the airbag 4 to prevent the bolts from colliding with the motor windings after falling off. Furthermore, after the airbag 4 is extended, it supports the air intake filter 5a at the front end of the compressor. A first switch 6 is set on the air intake filter 5a. The first switch 6 is connected to an external controller, and the controller controls the compressor to shut down urgently.

[0126] In order to prevent the rotating shaft 2a from continuing to rotate when the airbag 4 pushes against the air intake filter 5a, the rotating shaft 2a rotates, causing the airbag 4 to rotate and twist, thereby destroying the stability of the airbag 4, the panel of the first switch 6 is made of a metal panel, and the cover plate 9 of the airbag 4 is made of polytetrafluoroethylene. After the airbag 4 is pushed out, the cover plate 9 fits with the metal panel of the first switch 6. Since the sliding coefficients of the metal panel and the polytetrafluoroethylene cover plate 9 are very small, they can slide and roll briefly, so that the airbag 4 does not stick to the panel of the first switch 6 and twists, which can effectively stabilize the airbag system and prevent the airbag pressure on the gland 1a from being lost after twisting, and the gland 1a from falling off the rotating shaft 2a.

[0127] In the above embodiment, after the airbag 4 is opened, it pushes the first switch 6 on the intake filter 5a, causing the first switch 6 to send a signal to control the emergency shutdown of the compressor. However, there is a possibility that the compressor continues to be started without inspection. Therefore, the first switch 6 is set to a normally open state, and the airbag 4 pushes the first switch 6 to put it in a closed state. The first switch 6 sends a signal to an external controller to control the compressor to stop, so as to ensure that the first switch 6 is always in a closed state during the period when the airbag 4 expands and pushes the first switch 6, and the compressor can be restarted until the fault is eliminated.

[0128] In some embodiments, the compressor comprises a semi-hermetic screw compressor.

[0129] In some embodiments, the shaft system of the semi-enclosed screw compressor is a single cantilever structure, and a gland 1a is provided at the cantilever end to limit the axial movement of the motor, and the gland 1a is fastened to the rotating shaft 2a by bolts at the axis. When the gland 1a falls off, it will hit the compressor motor winding, causing the motor to burn out.

[0130] Based on this, the compressor includes a protective device for the detachment of the combined components. When the connecting member 3 is loose and the pressure cover 1a and the rotating shaft 2a are detached, the airbag 4 expands in response to the detachment of the pressure cover 1a and the rotating shaft 2a, and covers the connecting member 3 in the airbag 4 to prevent the connecting member 3 from colliding with the motor winding after falling off, causing damage to the motor, and thus creating a safety hazard.

[0131] Based on the above-mentioned embodiments of the present disclosure, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0132] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A protective device for the detachment of a combined component, characterized in that: include: First component (1); The second component (2); A connecting member (3) connecting the first component (1) and the second component (2) in sequence; and An airbag (4) is provided on the first component (1) and is arranged around the connecting member (3). The airbag (4) is configured to expand in response to the separation of the first component (1) and the second component (2) and to cover the connecting member (3).

2. The protective device for detaching a combined component according to claim 1, characterized in that: Also includes: a third component (5) arranged in a direction where the first component (1) is away from the second component (2); as well as The first switch (6) is provided on the third component (5), and the first switch (6) is configured to send out a warning signal when being pushed by the airbag (4) when it is inflated.

3. The protective device for detaching a combined component according to claim 2, characterized in that: The invention also comprises a controller, the controller being electrically connected to the second component (2) and the first switch (6), the controller being configured to control the movement of the second component (2) and to control the second component (2) to stop moving after receiving a warning signal from the first switch (6).

4. The protective device for detaching a combined component according to claim 1, characterized in that: An annular groove is provided on the first component (1) around the position where the connecting member (3) is inserted, and the airbag (4) is arranged in the annular groove.

5. The protective device for detaching a combined component according to claim 1, characterized in that: It also includes a piezoelectric trigger (7), which is squeezed and arranged between the connecting member (3) and the first component (1), and the piezoelectric trigger (7) is configured to send a signal to control the expansion of the airbag (4) in response to the separation of the first component (1) and the second component (2).

6. The protective device for the detachment of the combined components according to claim 5, characterized in that: The first component (1) is provided with a first hole, a portion of the piezoelectric trigger (7) is arranged in the first hole, and another portion of the piezoelectric trigger (7) is located outside the first hole.

7. The protective device for detaching a combined component according to claim 5, characterized in that: The invention also comprises a second switch (8), wherein the second switch (8) is connected in series to a control circuit in which the piezoelectric trigger (7) and the airbag (4) are located, and the second switch (8) is configured to cut off the control circuit when the connecting member (3) squeezes the piezoelectric trigger (7) to connect the first component (1) and the second component (2), and the second switch (8) is configured to connect the control circuit in response to the separation of the first component (1) and the second component (2) and before the piezoelectric trigger (7) sends a signal.

8. The protective device for detaching a combined component according to claim 7, characterized in that: The second switch (8) is squeezed and arranged between the connecting member (3) and the first component (1), and the second switch (8) is configured to be squeezed by the connecting member (3) synchronously with the piezoelectric trigger (7) after the connecting member (3) squeezes the piezoelectric trigger (7) to reach a first stroke.

9. The protective device for detaching a combined component according to claim 8, characterized in that: The second switch (8) is configured to be squeezed by the connecting member (3) synchronously with the piezoelectric trigger (7), and after the piezoelectric trigger (7) is squeezed to reach a second stroke, the second switch (8) cuts off the control circuit.

10. The protective device for detaching a combined component according to claim 9, characterized in that: The piezoelectric trigger (7) is configured to complete energy storage after the second switch (8) cuts off the control circuit and is squeezed by the connecting member (3) to reach a third stroke; the connecting member (3) is configured to complete the connection between the first component (1) and the second component (2) after the piezoelectric trigger (7) completes energy storage.

11. The protective device for detaching a combined component according to claim 10, characterized in that: The first stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage, the second stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage, and the third stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage.

12. The protective device for detaching a combined component according to claim 7, characterized in that: The first component (1) is provided with a second hole, a portion of the second switch (8) is arranged in the second hole, and another portion of the second switch (8) is located outside the second hole.

13. The protective device for detaching a combined component according to claim 12, characterized in that: The first component (1) is provided with a first hole, a portion of the piezoelectric trigger (7) is provided in the first hole, and another portion of the piezoelectric trigger (7) is located outside the first hole; the portion of the piezoelectric trigger (7) located outside the first hole first contacts the connecting member (3) relative to the portion of the second switch (8) located outside the first hole.

14. The protective device for detaching a combined component according to claim 1, characterized in that: A cover plate (9) is provided on a side of the airbag (4) away from the first component (1), and the cover plate (9) is configured to abut against a panel of the first switch (6) after the airbag (4) is inflated.

15. A compressor, characterized in that: The invention comprises a protective device for disengaging a combined component according to any one of claims 1 to 14, wherein the first component (1) is a gland (1a) of the compressor, and the second component (2) is a rotating shaft (2a) of the compressor.

16. The compressor according to claim 15, characterized in that The protective device for the separation of the combined components also includes: a third component (5), arranged in a direction of the gland (1a) away from the rotating shaft (2a), the third component (5) being an air intake filter (5a) of the compressor; and A first switch (6) is provided on the air intake filter (5a), and the first switch (6) is configured to send out a warning signal when being pushed by the air bag (4) when inflated.

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