Protective cover assembly and rotary equipment

Abstract

The utility model relates to a protective cover assembly and rotary equipment. The protective cover assembly comprises an end cover and a protective cover, and the protective cover is connected to the end cover in a drawing mode so as to allow the protective cover to selectively shield or expose a part to be protected. The protection function and the convenient maintenance function of the protection cover assembly are achieved through the simple combination piece structure and the convenient pulling operation of the protection cover assembly. And rotation equipment is safe and reliable in operation and convenient to overhaul.

Description

Technical Field

[0001] The present disclosure relates to the field of compressors, in particular to a protective cover assembly and a rotary device provided with the protective cover assembly. The protective cover assembly facilitates the protection and maintenance of a component to be protected. Background Art

[0002] The screw compressor is mainly connected to the open motor through a coupling. Because the motor rotates at high speed, the coupling must be provided with a corresponding protective cover assembly to ensure that the rotating equipment does not cause harm to the surrounding environment and human body during operation. In addition, the coupling needs to be regularly inspected and maintained. The existing protective cover assembly has problems such as complex structure and large size, large space occupation, complex installation, and inconvenient operation of repairing the coupling. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the present disclosure provides a protective cover assembly to facilitate the protection and maintenance of the components to be protected (especially, the coupling).

[0004] In one aspect, the present disclosure provides a protective cover assembly, comprising an end cap and a protective cover, wherein the protective cover is connected to the end cap in a pull-out manner to allow the protective cover to selectively shield or expose a component to be protected.

[0005] Therefore, the protective cover assembly realizes the protection function and the convenient maintenance function of the protective cover assembly with a simple assembly structure and a convenient pulling operation.

[0006] In one or more embodiments, the protection cover is movable relative to the end cover between a retracted position exposing the component to be protected and an extended position shielding the component to be protected.

[0007] Therefore, by moving between the retracted position and the extended position, the protective cover assembly can not only completely cover the components to be protected, thereby effectively preventing the high-speed rotation of the motor from causing damage to the surrounding environment and human body, but also provide a fully open maintenance space and good visibility.

[0008] In one or more embodiments, the protective cover has a cylindrical cover body and is at least partially inserted into the end cover.

[0009] Therefore, the structure of the cylindrical cover body facilitates the telescopic movement of the protective cover relative to the end cover and improves the centering accuracy during assembly.

[0010] In one or more embodiments, the end cap includes an attachment end configured to be attached to a rotating device on which the component to be protected is mounted.

[0011] Thus, the protective cover assembly is attached to the rotary device through the end cover, so that no floor space is occupied. Moreover, the connection structure is simple and the installation is simple.

[0012] In one or more embodiments, the end cap includes an extension extending from the attachment end, the extension configured to have an inner cavity for receiving at least a portion of the protective cover.

[0013] Therefore, the inner cavity of the extension portion provides sufficient space for realizing the pull-out connection between the end cover and the protective cover.

[0014] In one or more embodiments, the extension includes a support segment disposed within the inner cavity and adjacent to a distal end surface of the extension, the support segment being configured to support at least a portion of the protective cover.

[0015] In one or more embodiments, the cylindrical cover has a first portion configured to pass through the support segment and be inserted into the inner cavity, and at least a portion of the first portion is supported by the support segment to achieve a pull-out connection.

[0016] Thus, the support section of the end cover supports at least a portion of the first portion of the protective cover, so as to facilitate the pull-out connection between the end cover and the protective cover.

[0017] In one or more embodiments, the support section length of the support section is set to 25%-35% of the maximum retracted length of the cover body provided by the length of the first portion.

[0018] Thus, the length of the support section is set to ensure that the protective cover does not tilt or deflect significantly when it is freely pulled out in the end cover.

[0019] In one or more embodiments, the inner cavity provides a maximum allowable retraction amount, and the difference between the maximum allowable retraction amount and the maximum retracted length of the cover body provided by the length of the first portion is between 0 and 10 mm.

[0020] Therefore, the range setting of the difference not only ensures that the protective cover has sufficient retraction space, but also prevents the difference from being too large to increase the length of the end cover, thereby increasing the casting cost.

[0021] In one or more embodiments, the difference between the inner diameter of the support segment of the support segment and the first outer diameter of the cover body of the first portion is between 0.1 mm and 0.2 mm.

[0022] Therefore, the range setting of the difference ensures that the pull-out connection between the end cover and the protective cover is a small clearance fit, and also meets the accuracy requirement for centering the motor with reference to the positioning hole of the protective cover.

[0023] In one or more embodiments, the cylindrical cover has a second portion extending axially relative to the first portion, and a second outer diameter of the cover of the second portion is greater than a first outer diameter of the cover of the first portion.

[0024] Thus, the arrangement of the first and second portions of the cylindrical cover facilitates defining a maximum retracted length of the cover provided by the length of the first portion.

[0025] In one or more embodiments, the second outer diameter of the cover body of the second portion is greater than the inner diameter of the support segment of the support segment.

[0026] Thus, the second portion of the cylindrical cover is located outside the inner cavity of the extension portion, thereby preventing the protective cover from being fully retracted into the inner cavity.

[0027] In one or more embodiments, the second portion is configured to be detachably connected to the motor.

[0028] The detachable connection thus provides good visibility and ample maintenance space for coupling servicing in a simple manner.

[0029] In one or more embodiments, the second portion is provided at an end surface with at least one positioning hole for positioning and connecting with the motor.

[0030] Therefore, the provision of the positioning holes facilitates the detachable connection between the protective cover and the motor and the pre-positioning of the motor.

[0031] In one or more embodiments, the at least one positioning hole includes two positioning holes.

[0032] Therefore, the two positioning holes facilitate providing a pre-positioning reference for the motor, thereby reducing the difficulty of centering and leveling the compressor-coupling-motor.

[0033] In one or more embodiments, the support segment is coated with a lubricating material.

[0034] Therefore, the material with lubricating function is applied to the supporting section to ensure smooth pulling and drawing of the protective cover.

[0035] In one or more embodiments, the first portion of the protective cover is provided with one or more observation holes.

[0036] Therefore, the setting of the observation hole makes it easy to observe the operating status of the coupling in real time when the coupling is operating normally.

[0037] In one or more embodiments, the plurality of observation holes are symmetrically arranged with respect to an axial center line of the protective cover.

[0038] Therefore, the symmetrical arrangement of the multiple observation holes makes it easy to ensure the strength of the protective cover and improve the centering accuracy required during assembly.

[0039] In one or more embodiments, the shape of the observation hole is circular, polygonal or other shapes.

[0040] Therefore, the shape of the observation hole is convenient for ensuring the strength of the protective cover and is easy to process.

[0041] In one or more embodiments, the attachment end has a shaft seal seat on the opposite side of the attachment end surface for attachment to the rotating device, wherein the shaft seal seat is configured to accommodate a shaft seal.

[0042] Thus, the arrangement of the shaft seal provides the required sealing for the rotating equipment.

[0043] In one or more embodiments, the extension portion is provided with an inspection hole at a position adjacent to the shaft seal seat for facilitating inspection of the shaft seal.

[0044] Therefore, the provision of the inspection hole facilitates the inspection of the shaft seal when the machine is shut down.

[0045] In one or more embodiments, the manhole is provided with a cover.

[0046] Thus, the provision of the cover facilitates preventing the intrusion of foreign matter such as dust.

[0047] In one or more embodiments, the component to be protected is a coupling.

[0048] Therefore, the protective cover assembly according to the present disclosure provides a sufficient protection function and a convenient maintenance function for the coupling.

[0049] In another aspect, the present disclosure provides a rotary device. The rotary device includes a compressor and a motor driving the compressor, wherein the rotating shaft of the compressor and the motor shaft of the motor are connected via a coupling. The protective cover assembly according to the present disclosure is installed between the compressor and the motor.

[0050] Therefore, the operation of the rotary equipment is safe and reliable and convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The present disclosure will be more easily understood by the following detailed description in conjunction with the accompanying drawings, in which the same reference numerals represent the same elements. The accompanying drawings are schematic and non-restrictive. The elements in the accompanying drawings are not necessarily represented to scale, for example, the elements may be enlarged for the purpose of illustration, or may be reduced in proportion to keep the drawings clear and easy to understand.

[0052] In the attached picture:

[0053] Figure 1 A perspective view of a protective cover assembly according to an embodiment of the present disclosure is schematically shown.

[0054] Figure 2 A front view of a protective cover assembly in an extended position according to an embodiment of the present disclosure is schematically shown.

[0055] Figure 3 A front view of a protective cover assembly in a retracted position according to an embodiment of the present disclosure is schematically shown.

[0056] Figure 4 A perspective view of an end cap of a protective cover assembly according to an embodiment of the present disclosure is schematically shown.

[0057] Figure 5 A perspective view of a protective cover of a protective cover assembly according to an embodiment of the present disclosure is schematically shown.

[0058] Figure 6 The figure schematically shows the positioning of a protective cover of a protective cover assembly relative to a motor according to an embodiment of the present disclosure.

[0059] Figure 7 A schematic diagram showing a protective cover assembly in a maintenance state according to an embodiment of the present disclosure is shown.

[0060] Figure 8 A schematic diagram showing a protective cover assembly in a normal operating state according to an embodiment of the present disclosure is shown.

[0061] Explanation of the reference numerals: 1 end cover; 11 extension portion; 12 support section; 13 attachment end; 14 shaft seal seat; 16 inspection hole; 18 sealing cover; 2 protective cover; 22 cylindrical cover body; 23 first part; 24 second part; 26 observation hole; 27 connecting end; 28 positioning hole; 4 compressor; 42 rotating shaft; 5 motor; 51 connecting hole; 52 motor shaft; 6 coupling; L1 maximum allowable retraction amount; L2 maximum retraction length of cover body; D inner diameter of support section; h length of support section; d first outer diameter of cover body; d' second outer diameter of cover body. DETAILED DESCRIPTION

[0062] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings show several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below. The embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should be understood that in all the drawings, the same reference numerals represent the same elements.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present disclosure. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The terms "including" and "having" and any derivatives thereof in the specification and claims of the present disclosure are intended to cover non-exclusive inclusions.

[0064] In the description of the embodiments of the present disclosure, the terms "first", "second", etc. are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "plurality" is more than two, unless otherwise clearly defined.

[0065] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0067] In the description of the embodiments of the present disclosure, the terms "distal", "proximal", "longitudinal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present disclosure.

[0068] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0069] refer to Figure 7 Typically, the end cover 1 is attached to the screw compressor 4. The rotating shaft 42 extending from the screw compressor 4 through the end cover 1 is connected to the motor shaft 52 extending from the open motor 5 through the coupling 6 so that the rotating shaft 42 is driven to rotate by the motor 5. The high-speed rotation of the rotating shaft 42 and the motor shaft 52 during operation may cause harm to the surrounding environment and human body. For this reason, a protective cover must be provided to shield the rotating shaft 42, the motor shaft 52 and / or the coupling 6 at least during operation. In addition, the coupling 6 needs to be inspected, repaired and maintained during shutdown, which requires good visibility and sufficient maintenance space for the coupling.

[0070] The prior art provides a floor-standing protective cover for a coupling. The cover body of the protective cover is fixed to the base legs by bottom bolts, and has a complex structure and large size, and is complex to install and occupies floor space. The protective cover is an integral structure that cannot be opened. When the screw unit needs to be turned to check whether it rotates flexibly, the entire protective cover needs to be removed, which is very inconvenient.

[0071] The prior art also provides a floor-standing protective cover. The protective cover is supported by an angle steel support frame and still occupies ground space. The protective cover is a semi-enclosed structure with a detachable maintenance window. Since the protective cover cannot completely expose the coupling, although it provides a certain degree of visibility, the maintenance space is still limited, making it inconvenient to inspect the coupling.

[0072] The prior art also provides a cylindrical protective cover. The protective cover is directly mounted on the motor or rotating equipment without the need for floor-mounted installation, thus not occupying ground space, but has poor versatility and cannot match rotating equipment of different sizes. The protective cover may have a semi-open structure or a hood window structure. Since the protective cover cannot completely expose the coupling, although it provides a certain degree of visibility, the maintenance space is still limited, making it inconvenient to inspect the coupling.

[0073] Therefore, the protective cover of the above-mentioned prior art is fixed relative to the coupling and still at least partially closes the coupling during maintenance, thereby providing only limited maintenance space, having a complex structure and large size, and is complex to install and inconvenient to maintain the coupling.

[0074] In order to overcome the above-mentioned deficiencies, the present disclosure provides a protective cover assembly, which facilitates providing a fully open maintenance space for a component to be protected (eg, a coupling). Figures 1 to 8 A schematic diagram of a protective cover assembly and its related components according to an embodiment of the present disclosure is shown.

[0075] In the present disclosure, the rotating device may be installed with a component to be protected, and the rotating device in this article is exemplified by a compressor 4 having a rotating shaft 42. The rotating device may be driven by a driving mechanism, and the driving mechanism in this article is exemplified by a motor 5 having a motor shaft 52. The rotating shaft 42 and the motor shaft 52 are connected by a coupling 6, and the coupling 6 is used as the component to be protected in this article.

[0076] refer to Figure 7 , the side close to the compressor 4 is defined as the proximal side, and the side close to the motor 5 is defined as the distal side. The compressor 4, the end cover 1, the protective cover 2 and the motor 5 are connected together in sequence from the proximal side to the distal side.

[0077] Instead of the traditional independent protective cover and independent end cover 1 being designed and fixedly connected separately, the protective cover assembly according to the present disclosure is a one-piece structure composed of the protective cover 2 and the end cover 1. That is, the protective cover assembly is arranged between the compressor 4 and the motor 5 as a combined part.

[0078] Reference Figures 1 to 8 According to the present invention, the protective cover assembly includes an end cap 1 and a protective cover 2. Specifically, the end cap 1 can be an air intake end cap. The protective cover 2 is connected to the end cap 1 in a pull-out manner to form a combined component. Due to the pull-out connection, the protective cover 2 can move telescopically relative to the end cap 1 to selectively shield or expose the components to be protected. In this way, the protective cover assembly according to the present invention realizes the protection function and the convenient maintenance function with a simple combined component structure and convenient pull-out operation.

[0079] In the disclosure, the components to be protected may include the rotating shaft 42, the coupling 6 and / or the motor shaft 52 (hereinafter, the coupling 6 will be taken as an example for explanation). In particular, the component to be protected is the coupling 6, so that the entire coupling 6 can be exposed by retracting the protective cover during shutdown (i.e., providing a fully open inspection space for the coupling 6), so as to facilitate inspection, maintenance or service of the coupling 6.

[0080] Specifically, refer to Figure 7 and Figure 8 The protective cover 2 can move relative to the end cover 1 between a retracted position exposing the components to be protected (especially, the coupling 6) and an extended position shielding the components to be protected. When the compressor 4 is stopped, the protective cover 2 can be retracted relative to the end cover 1 to expose the entire coupling 6 (see Figure 7 ). Since the entire coupling 6 can be fully exposed, a fully open maintenance space and good visibility are provided, which makes it easier to inspect, maintain or service the coupling than the semi-enclosed protective cover of the prior art. When the compressor 4 is working, the protective cover 2 can extend relative to the end cover 1 to cover the coupling 6 (see Figure 8 ) Moreover, the protective cover 2 can also be connected to the motor 5, thereby completely shielding the rotating shaft 42, the coupling 6 and the motor shaft 52, thereby effectively preventing the high-speed rotation of the motor from causing damage to the surrounding environment and human body.

[0081] In addition, the pull-out connection between the protective cover 2 and the end cover 1 makes it easy for the operator to adjust the pulling amount of the protective cover 2 relative to the end cover 1 as needed to adapt to motors of different powers and couplings of different lengths; and makes it easy for the operator to adjust the retraction amount of the protective cover 2 relative to the end cover 1 as needed to expose the desired part.

[0082] Reference Figure 1 and Figure 5The protective cover 1 is a cylindrical structure. The protective cover 2 includes a cylindrical cover body 22, which is at least partially sleeved in the end cover 1. The cylindrical structure facilitates the protective cover to perform telescopic movement relative to the end cover and improves the centering accuracy during assembly.

[0083] refer to Figure 1 , Figure 4 and Figure 7-8 , the end cover 1 includes an attachment end 13 and an extension 11 extending from the attachment end 13. The proximal attachment end face of the attachment end 13 is tightly against the compressor 4. The attachment end 13 can be configured to be attached to the compressor 4 using fasteners. In addition, the attachment end 13 has a shaft seal seat 14 on the opposite side (distal side) of the attachment end face. The shaft seal seat 14 is configured to accommodate a shaft seal that performs a sealing function so as to provide the required sealing for the compressor. The extension portion 11 is configured to have an inner cavity for receiving at least a portion of the cylindrical cover body 22. Thus, the inner cavity of the extension portion provides sufficient space for realizing a pull-out connection between the end cover and the protective cover. The shaft seal seat 14 is also accommodated in the inner cavity. The extension portion 11 has a distal extension from the attachment end 13 to the distal end face. The extension portion 11 includes a support section 12 configured to support at least a portion of the protective cover 2. The support section 12 is arranged in the inner cavity and adjacent to the distal end face. The support section 12 has a support section inner diameter D and a support section length h. The inner cavity of the end cover 1 provides a maximum allowable retraction amount L1 for allowing the protective cover 2 to retract. The maximum allowable retraction amount L1 can be defined between the distal end surface of the shaft seal seat 14 and the distal end surface of the extension portion 11 (see Figure 4 ). Thus, with a simple structure, the support section of the end cover supports at least a part of the protective cover, so as to realize a pull-out connection between the end cover and the protective cover. In addition, the extension portion 11 of the end cover 1 may be provided with an inspection hole 16 at a position adjacent to the shaft seal seat 14, so as to facilitate the inspection of the shaft seal installed in the shaft seal seat 14 during shutdown. A cover 18 may be provided on the inspection hole 16 to prevent the intrusion of foreign matter such as dust. The cover 18 may be provided with one or more observation ports for real-time observation. Due to the pull-out connection between the protective cover 2 and the end cover 1, it is convenient to pull the protective cover 2 out of the inner cavity of the extension portion 11 of the end cover 1 during inspection, thereby leaving enough space in the inner cavity for the operator to inspect the shaft seal in the shaft seal seat 14 through the inspection hole 16.

[0084] Reference Figure 1 and Figure 5, the cylindrical cover body 22 of the protective cover 2 is at least partially mounted in the inner cavity of the extension portion 11. The cylindrical cover body 22 has a first part 23 and a second part 24. The first part 23 can be configured to be inserted into the inner cavity of the end cover 1 and connected to the end cover 1 in a pull-out manner. The first part 23 of the cylindrical cover body 22 has a first outer diameter d of the cover body. The second part 24 is shown as a flange portion extending axially relative to the first part 23. The second part 24 of the cylindrical cover body 22 has a second outer diameter d' of the cover body that is greater than the first outer diameter d of the cover body. The difference between the inner diameter D of the support section and the first outer diameter d of the cover body is between 0.1mm and 0.2mm, that is, 0.1mm≤Dd≤0.2mm. The specific range of Dd can also be determined according to actual conditions, in order to ensure that the pull-out connection between the end cover 1 and the protective cover 2 is a small clearance fit. At the same time, this also meets the accuracy requirements for centering the motor with reference to the protective cover positioning hole to be described below. The second outer diameter d' of the shield is greater than the inner diameter D of the support section, so that the second portion 24 of the cylindrical shield is located outside the inner cavity of the extension portion 11, thereby preventing the protective shield 2 from being fully retracted into the inner cavity of the extension portion 11. The arrangement of the first portion and the second portion of the cylindrical shield facilitates defining the length of the first portion 23, which provides the maximum retracted length L2 of the shield. The maximum retracted length L2 of the shield is measured between the proximal end surface of the first portion 23 and the proximal end surface of the first portion 24 (see Figure 5 ). The difference between the maximum allowable retraction amount L1 and the maximum retraction length L2 of the cover body is between 0 and 10mm, that is, 0mm≤L1-L2≤10mm. Therefore, the range setting of the difference not only ensures that the protective cover has sufficient retraction space. The difference between the maximum allowable retraction amount L1 and the maximum retraction length L2 of the cover body should not be too large, generally 10mm. If the difference is too large, the length of the end cover 1 will be increased, thereby increasing the casting cost.

[0085] The protective cover 2 can be substantially coaxially mounted with the end cover 1. When the end cover 1 and the protective cover 2 are mounted to form a protective cover assembly, the first portion 23 of the cylindrical cover body 22 can be inserted into the extension portion 11 of the end cover 1 through the support section 12 of the extension portion 11, so that at least a portion of the first portion 23 is supported by the support section 12 and can slide relative to the support section, thereby realizing a pull-out connection. The support section length h of the support section 12 is set to 25%-35% of the maximum retracted length L2 of the cover body, that is, 25%≤h / L2≤35%. The setting of the support section length h ensures that the protective cover will not be significantly tilted or offset when it is freely pulled out in the end cover 1. In order to ensure smooth pulling and pulling of the protective cover 2, it is necessary to regularly apply a small amount of grease or other materials with lubricating function at the support section 12. In addition, since the protective cover 2 and the end cover 1 have a matching coaxially mounted cylindrical structure, the protective cover 2 can also rotate relative to the end cover 1.

[0086] The end cover 1 of the shield assembly can be configured to be attached to the compressor 4 at the attachment end 13. For example, Figure 7 and Figure 8 As shown, the end cover 1 is attached to the compressor 4 by fasteners (such as bolts, etc.) for fixing the shield assembly.

[0087] The second portion 24 may be configured to be detachably connected to the motor. The end surface 27 of the second portion 24 (ie, the flange portion) of the protective cover 2 may be provided with at least one positioning hole 28 for positioning and connecting with the motor 5. Figure 4 In the example shown, two positioning holes are provided. The number of positioning holes can be more as required. Figure 6 The motor 5 is provided with a corresponding number of positioning structures on the axial end face facing the protective cover assembly (in this example, two connecting holes 51 are shown).

[0088] The positioning holes 28 on the protective cover 2 can be connected to the connecting holes 51 of the motor 5 by means of fasteners, together with the attachment of the end cover 1 to the compressor 4 at the attachment end 13, to provide a stable support for the entire protective cover assembly between the compressor 4 and the motor 5.

[0089] With the end cover 1 of the shield assembly attached to the compressor 4 and the shield 2 connected to the motor 5, the shield assembly can be securely arranged between the compressor 4 and the motor 5 to facilitate the above-mentioned protection function. When maintenance is required, the fasteners are simply removed during shutdown, and the shield 1 is pushed into the inner cavity of the end cover 1 to expose the entire coupling 6, thereby performing the above-mentioned convenient maintenance function. In other words, the detachable connection between the shield 2 and the motor 5 facilitates good visibility and sufficient maintenance space for coupling maintenance in a simple operation manner.

[0090] Of course, the protective cover 2 may not be connected to the motor 5. In this case, the protective cover assembly is cantilevered on the compressor. Although the installation stability of the protective cover assembly is poor, it can still achieve its protection function and facilitate maintenance function.

[0091] Therefore, the number of parts of the protective cover assembly according to the present disclosure is greatly reduced, the structural strength is greatly increased, the floor-standing support structure mentioned in the prior art is not required, and the protective cover 2 that has been connected to the end cover 1 in a pull-out manner no longer needs additional connecting parts to be fixed to the compressor, and the pull-out operation is simple and convenient. In short, the protective cover assembly has a simple connection structure, simple assembly, convenient operation, and does not occupy ground space.

[0092] When the protective cover assembly is applied to the compressor, the rotating shaft 42 extending from the compressor 4 is passed through the end cover 1 and the protective cover 2 which are fitted together of the protective cover assembly, and then the protective cover 2 is pulled out relative to the end cover 1 to the desired extension amount, and then the protective cover 2 is appropriately rotated relative to the end cover 1 so that the two positioning holes are in the same horizontal plane, and then the position of the motor 5 is adjusted so that the connecting hole 51 and the positioning hole 28 are aligned to pre-position the motor 5, and then the coupling 6 is used to connect the rotating shaft 42 with the motor shaft 52 extending from the motor 5, and then the compressor-coupling-motor alignment is further leveled, and finally the positioning hole 28 and the connecting hole 51 are connected by fasteners to removably connect the protective cover 2 to the motor 5.

[0093] The alignment between the connection hole 51 and the positioning hole 28 will provide a pre-positioning reference for the motor 5 to a great extent, thereby reducing the difficulty of the next process (i.e., compressor-coupling-motor centering and leveling). Because if there is no pre-positioning reference provided by the protective cover 2, the purpose of centering and leveling can only be achieved by gradually adjusting the relative position of the compressor 4 and the motor 5, and continuously adapting and correcting from at least three directions. The use of the protective cover 2 and the motor 5 for priority pre-positioning can reduce the blindness of the centering and leveling process, make the adjustment more accurate, and improve the efficiency of the centering and leveling process.

[0094] The cylindrical cover body 22 may be provided with an observation hole 26, so as to observe the operation status of the coupling 6 in real time when the coupling is operating normally. On the premise of ensuring the strength of the protective cover, the size, shape and number of the observation holes can be determined according to user needs. The shape of the observation hole can be circular, polygonal or other shapes. Figure 5 The observation hole 26 shown is a circular hole to facilitate processing and meet the visibility requirements of real-time observation.

[0095] like Figure 5 As shown, one or more observation holes 26 may be provided on the first portion 23 of the cylindrical cover body 22. The multiple observation holes 26 are symmetrically arranged about the axial center line of the protective cover 2. The symmetrical arrangement of the multiple observation holes makes it easy to ensure the strength of the protective cover and improve the centering accuracy required during assembly. For example, the observation holes 26 include two groups of observation holes arranged relative to each other along the diameter, each group of observation holes includes a plurality of rows of observation holes evenly spaced apart along the axial direction, and each row of observation holes is arranged on the cylindrical cover body 22 along a straight line parallel to the central axis of the cylindrical cover body 22. The multiple small observation holes evenly arranged in this way can well ensure the strength of the protective cover and the real-time nature of the observation. In an example not shown, the multiple observation holes 26 of the cylindrical cover body 22 are arranged in a manner different from that of the observation holes 26. Figure 4 In an example not shown, the cylindrical cover 22 may be provided with only one observation hole 26 .

[0096] The end cover 1 and the protective cover 2 can be made by casting. The protective cover 2 can be made of HT250 or QT450 material to provide sufficient structural strength. In order to reduce costs, the protective cover can be made of sheet metal or aluminum. The material of the end cover is generally HT250 or QT450, and its structural strength is sufficient to provide greater safety and reliability.

[0097] The present disclosure also provides a rotary device, the rotary device comprising a compressor and a motor driving the compressor, wherein the rotating shaft of the compressor and the motor shaft of the motor are connected via a coupling. The protective cover assembly according to the present disclosure is installed between the compressor and the motor to at least protect the coupling and facilitate maintenance of the coupling. Thus, the operation of the rotary device is safe and reliable and easy to maintain.

[0098] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A protective cover assembly, characterized in that: The protective cover assembly comprises an end cap and a protective cover, wherein the protective cover is connected to the end cap in a pull-out manner to allow the protective cover to selectively shield or expose a component to be protected.

2. The protective cover assembly according to claim 1, characterized in that: The protection cover can move relative to the end cover between a retracted position exposing the component to be protected and an extended position shielding the component to be protected.

3. The protective cover assembly according to claim 2, characterized in that: The protective cover has a cylindrical cover body and is at least partially sleeved in the end cover.

4. The protective cover assembly according to claim 1, characterized in that: The end cap includes an attachment end configured to be attached to a rotating device on which a component to be protected is mounted.

5. The protective cover assembly according to claim 4, characterized in that: The end cap includes an extension extending from the attachment end, the extension being configured to have an interior cavity for receiving at least a portion of the protective cover.

6. The protective cover assembly according to claim 5, characterized in that: The extension includes a support segment disposed within the inner cavity and adjacent to a distal end surface of the extension, the support segment being configured to support at least a portion of the protective cover.

7. The protective cover assembly according to claim 6, characterized in that: The cylindrical cover body has a first portion configured to pass through the support segment and be inserted into the inner cavity, and at least a portion of the first portion is supported by the support segment to achieve a pull-out connection.

8. The protective cover assembly according to claim 7, characterized in that: The support section length of the support section is set to 25%-35% of the maximum retracted length of the cover body provided by the length of the first portion.

9. The protective cover assembly according to claim 7, characterized in that: The inner cavity provides a maximum allowable retraction amount, and the difference between the maximum allowable retraction amount and the maximum retracted length of the cover body provided by the length of the first part is between 0 and 10 mm.

10. The protective cover assembly according to claim 7, characterized in that: The difference between the inner diameter of the support section of the supporting section and the first outer diameter of the cover body of the first part is between 0.1 mm and 0.2 mm.

11. The protective cover assembly according to claim 7, characterized in that: The cylindrical cover has a second portion extending axially relative to the first portion, and a second outer diameter of the cover of the second portion is greater than a first outer diameter of the cover of the first portion.

12. The protective cover assembly according to claim 11, characterized in that The second outer diameter of the cover body of the second portion is greater than the inner diameter of the support section of the supporting section.

13. The protective cover assembly according to claim 12, characterized in that: The second part is configured to be detachably connected to the motor.

14. The protective cover assembly according to claim 13, characterized in that The second part is provided with at least one positioning hole at an end surface thereof for positioning and connecting with the motor.

15. The protective cover assembly according to claim 14, characterized in that The at least one positioning hole includes two positioning holes.

16. The protective cover assembly according to any one of claims 6 to 15, characterized in that: The support section is coated with a lubricating material.

17. The protective cover assembly according to any one of claims 7 to 15, characterized in that: The first portion of the protective cover is provided with one or more observation holes.

18. The protective cover assembly according to claim 17, characterized in that The plurality of observation holes are symmetrically arranged with respect to an axial center line of the protective cover.

19. The protective cover assembly according to claim 17, characterized in that The shape of the observation hole is circular or polygonal.

20. The protective cover assembly according to any one of claims 4 to 15, characterized in that: The attachment end has a shaft seal seat on the opposite side of the attachment end surface for attachment to the rotating device, wherein the shaft seal seat is configured to accommodate a shaft seal.

21. The protective cover assembly according to claim 20, characterized in that The extension part is provided with an inspection hole at a position adjacent to the shaft seal seat for facilitating the inspection of the shaft seal.

22. The protective cover assembly according to claim 21, characterized in that The inspection hole is provided with a cover.

23. The protective cover assembly according to any one of claims 1 to 15, characterized in that: The part to be protected is the coupling.

24. A rotary device, characterized in that: The rotating device includes a compressor and a motor driving the compressor, the rotating shaft of the compressor and the motor shaft of the motor are connected by a coupling, and the protective cover assembly according to any one of claims 1-23 is installed between the compressor and the motor.

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