Sealing assembly of centrifugal compressor

Abstract

The utility model relates to the technical field of centrifugal compressors, in particular to a sealing assembly of a centrifugal compressor, which comprises a volute, a deformable airtight ring and a lubricating unit, the lubricating unit comprises a connecting ring, a first fixing ring, a second fixing ring, a base, a right-angle ring, an inserting ring, a liquid inlet pipe, a locking assembly and a blocking assembly, and the locking assembly is arranged on the outer side wall of the right-angle ring. During use, the deformable airtight ring makes contact with the first fixing ring, then the right-angle ring is covered downwards, the inserting ring enters the inserting groove till the right-angle ring abuts against the base, then the right-angle ring and the base are connected through the locking assembly, lubricating oil is poured into the liquid inlet pipe at the moment, and then the liquid inlet pipe is sealed. Lubricating oil enters the position below the deformable airtight ring from the round hole, the blocking assembly is used for sealing the liquid inlet pipe, in this way, the situation that the deformable airtight ring is abraded is avoided, the stability of the sealing structure is guaranteed, and the follow-up maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal compressor technology, and in particular to a sealing component for a centrifugal compressor. Background Technology

[0002] In centrifugal refrigeration compressors, the shaft end seal at the rear of the impeller typically uses a comb-tooth seal structure due to the pressure difference on both sides of the seal. However, the existing sealing components have a relatively complex structure, resulting in high manufacturing costs and inconvenience for later maintenance.

[0003] The prior art patent application with publication number CN218377012U discloses a device including a volute, a sealing bushing, and a deformable airtight ring. The volute is provided with a first sealing lip plate, the sealing bushing is provided with a second sealing lip plate, and the first sealing groove and the second sealing groove are provided with deformable airtight rings. The first sealing lip plate on the volute, together with the deformable airtight ring and the sealing bushing, forms a stable sealing connection, effectively preventing gas leakage, reducing the manufacturing cost of the equipment, and facilitating later maintenance.

[0004] However, using the above method, a stable sealing connection is formed by the first sealing lip plate on the volute housing working in conjunction with the deformable airtight ring and the sealing bushing. During the sealing process, the deformable airtight ring is exposed to air and cannot come into contact with lubricating oil, making it prone to wear and affecting the stability of the sealing structure. Utility Model Content

[0005] The purpose of this invention is to provide a sealing component for a centrifugal compressor, which solves the problem that deformable gas-tight rings exposed to air cannot come into contact with lubricating oil, are prone to wear, and thus affect the stability of the sealing structure.

[0006] To achieve the above objectives, this utility model provides a sealing assembly for a centrifugal compressor, including a volute, a deformable airtight ring, and a lubrication unit. The lubrication unit includes a connecting ring, a first fixing ring, a second fixing ring, a base, a right-angle ring, a insert ring, an inlet pipe, a locking assembly, and a blocking assembly. The deformable airtight ring is disposed below the volute, and the lubrication unit is disposed below the volute and connected to the deformable airtight ring. The connecting ring is fixedly connected to the volute and located on one side of the volute. The first fixing ring is fixedly connected to the connecting ring and located on one side of the connecting ring. The base is fixedly connected to the volute and located on one side of the volute. On one side, the right-angle ring is detachably connected to the base and located on one side of the base. The second fixing ring is fixedly connected to the right-angle ring and located on the inner sidewall of the right-angle ring. The first fixing ring and the second fixing ring each have an arc-shaped groove, which is adapted to the deformable airtight ring. The insert ring is fixedly connected to the right-angle ring and located on one side of the right-angle ring. The connecting ring has a slot, which is slidably engaged with the insert ring. The liquid inlet pipe communicates with the right-angle ring and is located on one side of the right-angle ring. The first fixing ring has multiple round holes. The locking assembly is located on the outer sidewall of the right-angle ring, and the blocking assembly is located on the inner sidewall of the liquid inlet pipe.

[0007] The locking assembly includes an ear plate, a support plate, and a locking bolt. The ear plate is fixedly connected to the base and located on the outer side wall of the base. The support plate is fixedly connected to the right-angle ring and located on the outer side wall of the right-angle ring. The ear plate and the support plate each have a threaded hole, and the threaded hole is threadedly engaged with the locking bolt.

[0008] The locking assembly further includes a housing, a spring, and a pressure ring. The housing is fixedly connected to the ear plate and located above the ear plate. The housing is slidably engaged with the support plate. The pressure ring contacts the support plate and is located below the support plate. The two ends of the spring are fixedly connected to the pressure ring and the ear plate, respectively, and the spring is sleeved on the outer wall of the locking bolt.

[0009] The blocking assembly includes a sealing plate and a blocking head. The blocking head is detachably connected to the inlet pipe and is located on the inner side wall of the inlet pipe. The sealing plate is fixedly connected to the blocking head and is located above the blocking head.

[0010] The blocking assembly further includes multiple arc-shaped blades, each of which is fixedly connected to the blocking head and located on the outer side wall of the blocking head, and each of which is in contact with the inlet pipe.

[0011] This utility model discloses a sealing assembly for a centrifugal compressor. In use, the deformable airtight ring is first brought into contact with the first fixing ring, then the right-angle ring is closed downwards, allowing the insertion ring to enter the slot until the right-angle ring abuts against the base. The assembly is then used to connect them. Lubricating oil is then poured in through the inlet pipe, entering below the deformable airtight ring through the circular hole. The blocking assembly seals the inlet pipe. This method prevents wear on the deformable airtight ring, ensures the stability of the sealing structure, and reduces subsequent maintenance costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the sealing assembly of the centrifugal compressor of this utility model.

[0014] Figure 2 This is a bottom view of the sealing assembly of the centrifugal compressor of this utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B.

[0017] Figure 5 This is the utility model Figure 3 Enlarged view of the local structure at point C.

[0018] 101-Vortex housing, 102-Deformable airtight ring, 103-Connecting ring, 104-First fixing ring, 105-Second fixing ring, 106-Base, 107-Right-angle ring, 108-Plug ring, 109-Inlet pipe, 110-Ear plate, 111-Support plate, 112-Locking bolt, 113-Outer shell, 114-Spring, 115-Pressure ring, 116-Sealing plate, 117-Plug head, 118-Arc-shaped blade, 119-Arc-shaped groove, 120-Slot, 121-Round hole, 122-Threaded hole. Detailed Implementation

[0019] Please see Figures 1 to 5 ,in, Figure 1 This is a schematic diagram of the sealing assembly of the centrifugal compressor of this utility model. Figure 2 This is a bottom view of the sealing assembly of the centrifugal compressor of this utility model. Figure 3 This is the utility model Figure 2AA-line sectional view, Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B. Figure 5 This is the utility model Figure 3 Enlarged view of the local structure at point C.

[0020] This utility model provides a sealing assembly for a centrifugal compressor, including a volute 101, a deformable airtight ring 102, and a lubrication unit. The lubrication unit includes a connecting ring 103, a first fixing ring 104, a second fixing ring 105, a base 106, a right-angle ring 107, a plug ring 108, an inlet pipe 109, a locking assembly, and a plugging assembly. The locking assembly includes an ear plate 110, a support plate 111, a locking bolt 112, a housing 113, a spring 114, and a pressure ring 115. The plugging assembly includes a sealing plate 116, a plugging head 117, and multiple arc-shaped blades 118. The first fixing ring 104 and the second fixing ring 105 each have an arc-shaped groove 119. The connecting ring 103 has a slot 120. The first fixing ring 104 has multiple round holes 121. The ear plate 110 and the support plate 111 each have threaded holes 122.

[0021] The deformable airtight ring 102 is disposed below the volute 101, and the lubrication unit is disposed below the volute 101 and connected to the deformable airtight ring 102; the connecting ring 103 is fixedly connected to the volute 101 and located on one side of the volute 101; the first fixing ring 104 is fixedly connected to the connecting ring 103 and located on one side of the connecting ring 103; the base 106 is fixedly connected to the volute 101 and located on one side of the volute 101; the right-angle ring 107 is detachably connected to the base 106 and located on one side of the base 106; the second fixing ring 105 is fixedly connected to the right-angle ring 107 and located on one side of the base 106. The inner wall of the right-angle ring 107 has an arc-shaped groove 119 for the first fixing ring 104 and the second fixing ring 105. The arc-shaped groove 119 is adapted to the deformable airtight ring 102. The insert ring 108 is fixedly connected to the right-angle ring 107 and is located on one side of the right-angle ring 107. The connecting ring 103 has a slot 120, which is slidably engaged with the insert ring 108. The liquid inlet pipe 109 is connected to the right-angle ring 107 and is located on one side of the right-angle ring 107. The first fixing ring 104 has a plurality of round holes 121. The locking assembly is disposed on the outer wall of the right-angle ring 107, and the blocking assembly is disposed on the inner wall of the liquid inlet pipe 109.

[0022] In this embodiment, during use, the deformable airtight ring 102 is first brought into contact with the first fixing ring 104, and then the right-angle ring 107 is closed downwards, so that the insertion ring 108 enters the slot 120 until the right-angle ring 107 abuts against the base 106. Then, the locking assembly is used to connect them. At this time, lubricating oil is poured in from the liquid inlet pipe 109, and the lubricating oil enters from the round hole 121 to the bottom of the deformable airtight ring 102. The plugging assembly is used to seal the liquid inlet pipe 109. In this way, wear of the deformable airtight ring 102 is avoided, the stability of the sealing structure is ensured, and the subsequent maintenance costs are reduced.

[0023] Furthermore, the ear plate 110 is fixedly connected to the base 106 and located on the outer side wall of the base 106, the support plate 111 is fixedly connected to the right-angle ring 107 and located on the outer side wall of the right-angle ring 107, the ear plate 110 and the support plate 111 respectively have threaded holes 122, and the threaded holes 122 are threadedly engaged with the locking bolt 112.

[0024] In this embodiment, the ear plate 110 and the support plate 111 are connected by the thread of the locking bolt 112 to fix the right-angle ring 107 and the base 106, which facilitates operation and use by the staff.

[0025] Furthermore, the outer shell 113 is fixedly connected to the ear plate 110 and is located above the ear plate 110, and the outer shell 113 is slidably engaged with the support plate 111. The pressure ring 115 contacts the support plate 111 and is located below the support plate 111. The two ends of the spring 114 are fixedly connected to the pressure ring 115 and the ear plate 110 respectively, and the spring 114 is sleeved on the outer side wall of the locking bolt 112.

[0026] In this embodiment, the pressure ring 115 and the spring 114 cooperate to provide a reverse force for locking the support plate 111, which is simple in structure and easy to learn and operate.

[0027] Furthermore, the plug head 117 is detachably connected to the inlet pipe 109 and is located on the inner side wall of the inlet pipe 109, and the sealing plate 116 is fixedly connected to the plug head 117 and is located above the plug head 117.

[0028] In this embodiment, the plug head 117 below the sealing plate 116 can seal the inlet pipe 109 to prevent lubricating oil leakage and reduce maintenance costs.

[0029] Furthermore, each of the multiple arc-shaped blades 118 is fixedly connected to the plug head 117 and is located on the outer side wall of the plug head 117, and each of the multiple arc-shaped blades 118 is in contact with the liquid inlet pipe 109.

[0030] In this embodiment, the arc-shaped blade 118 is made of rubber, which allows the plug head 117 to better fit the inner wall of the liquid inlet pipe 109 and improve the sealing performance of the plug head 117.

[0031] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. A sealing assembly for a centrifugal compressor, comprising a volute and a deformable gas-tight ring, wherein the deformable gas-tight ring is disposed below the volute, characterized in that, It also includes a lubrication unit, which is disposed below the volute and is connected to the deformable airtight ring; The lubrication unit includes a connecting ring, a first fixing ring, a second fixing ring, a base, a right-angle ring, a plug ring, an inlet pipe, a locking assembly, and a plugging assembly. The connecting ring is fixedly connected to the volute and located on one side of the volute. The first fixing ring is fixedly connected to the connecting ring and located on one side of the connecting ring. The base is fixedly connected to the volute and located on one side of the volute. The right-angle ring is detachably connected to the base and located on one side of the base. The second fixing ring is fixedly connected to the right-angle ring and located on the... The inner wall of the right-angle ring has arc-shaped grooves for the first and second fixing rings, which are adapted to the deformable airtight ring. The insert ring is fixedly connected to the right-angle ring and located on one side of the right-angle ring. The connecting ring has a slot that is slidably engaged with the insert ring. The liquid inlet pipe communicates with the right-angle ring and is located on one side of the right-angle ring. The first fixing ring has multiple round holes. The locking assembly is located on the outer wall of the right-angle ring, and the blocking assembly is located on the inner wall of the liquid inlet pipe.

2. The sealing assembly of the centrifugal compressor as described in claim 1, characterized in that, The locking assembly includes an ear plate, a support plate, and a locking bolt. The ear plate is fixedly connected to the base and located on the outer side wall of the base. The support plate is fixedly connected to the right-angle ring and located on the outer side wall of the right-angle ring. The ear plate and the support plate each have a threaded hole, and the threaded hole is threadedly engaged with the locking bolt.

3. The sealing assembly of the centrifugal compressor as described in claim 2, characterized in that, The locking assembly further includes a housing, a spring, and a pressure ring. The housing is fixedly connected to the ear plate and located above the ear plate. The housing is slidably engaged with the support plate. The pressure ring contacts the support plate and is located below the support plate. The two ends of the spring are fixedly connected to the pressure ring and the ear plate, respectively, and the spring is sleeved on the outer wall of the locking bolt.

4. The sealing assembly of the centrifugal compressor as described in claim 3, characterized in that, The plugging assembly includes a sealing plate and a plugging head. The plugging head is detachably connected to the inlet pipe and is located on the inner side wall of the inlet pipe. The sealing plate is fixedly connected to the plugging head and is located above the plugging head.

5. The sealing assembly of the centrifugal compressor as described in claim 4, characterized in that, The blocking assembly also includes multiple arc-shaped blades, each of which is fixedly connected to the blocking head and located on the outer side wall of the blocking head, and each of which is in contact with the inlet pipe.

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