轮背密封组件及压缩机

Abstract

本实用新型涉及压缩机技术领域，尤其涉及一种轮背密封组件及压缩机。该轮背密封组件包括主体部和耐磨部，其中主体部为整体结构，主体部上开设有第一通孔，该第一通孔沿轴向贯穿主体部。耐磨部与本体部互为独立构件，包括本体结构和凸台结构，本体结构其外形与主体部相适配，凸台结构由本体结构朝向主体部的方向延伸形成，其外径与第一通孔的内径相配合，实现插接定位。该凸台结构设置于耐磨部的一端，用于插设入主体部的第一通孔中。凸台结构内部开设有第二通孔，该第二通孔沿第一通孔的轴向方向贯穿耐磨部，供压缩机的转子轴穿设。通过将轮背密封组件分为主体部和耐磨部两部分，仅需拆卸并更换该耐磨部即可，无需整体更换整个轮背密封组件。

Claims

1. A wheel back seal assembly characterized by, include: The main body has a first through hole. The wear-resistant part has a body structure and a boss structure. The boss structure is formed by extending the body structure toward the main body. The body structure is detachably connected to the main body. The boss structure is inserted into the first through hole, and a second through hole is provided in the boss structure. The second through hole passes through the wear-resistant part along the axial direction of the first through hole. The second through hole is used to pass through the rotor.

2. The wheel back seal assembly of claim 1, wherein, The wear-resistant part is a graphite component.

3. The wheel back seal assembly of claim 1 or 2, wherein, The main body has multiple connecting holes, and the wear-resistant part has multiple limiting holes. The limiting holes correspond one-to-one with the connecting holes and are coaxially arranged. The wheel back sealing assembly also includes multiple connectors, each of which passes through a limiting hole and is connected to the connecting hole.

4. A compressor characterized by, include: A housing assembly having an inner cavity and an air intake cavity; The wheel back sealing assembly according to any one of claims 1 to 3 is installed inside the housing assembly and separates the inner cavity from the air intake cavity; An impeller is rotatably disposed in the air inlet chamber. Along the axial direction of the impeller, the back of the impeller is disposed opposite to the wear-resistant part of the impeller back sealing assembly, and a sealing gap is provided between the impeller and the body structure of the wear-resistant part. The sealing gap is provided with a sealing structure.

5. The compressor of claim 4, wherein, The sealing structure includes: Multiple first protrusion structures are formed in a ring shape on the back of the impeller and are coaxially arranged with the impeller. The multiple first protrusion structures are arranged at intervals along the radial direction of the impeller. Multiple second protrusion structures are formed in a ring shape on the side of the main body structure opposite to the impeller and are coaxially arranged with the impeller. The multiple second protrusion structures are arranged at intervals along the radial direction of the impeller. The plurality of first protrusion structures and the plurality of second protrusion structures are arranged alternately along the radial direction of the impeller, and define a sealing gap that meanders along the radial direction of the impeller between the back of the impeller and the wheel back sealing assembly.

6. The compressor of claim 5, wherein, Along the axial direction, the end face of the first protrusion structure facing the body structure is provided with at least two coaxially arranged first annular grooves. All the first annular grooves are arranged sequentially at intervals along the radial direction of the impeller and divide the first protrusion structure into a plurality of first comb tooth structures. The first comb tooth structures extend obliquely to the outside of the radial direction of the impeller relative to the axial direction. And / or, along the axial direction, the end face of the second protrusion structure facing the impeller side is provided with at least two coaxially arranged second annular grooves, all of the second annular grooves are arranged sequentially at intervals along the radial direction of the impeller and the second protrusion structure is divided into a plurality of second comb tooth structures, the second comb tooth structures extending obliquely outward relative to the axial direction toward the radial side of the impeller.

7. The compressor of any one of claims 4 to 6, wherein, Along the direction of gas flow within the sealing gap, the sealing gap has an upstream end and a downstream end, the upstream end communicating with the air inlet chamber; The inner cavity includes a heat dissipation channel, and the main body is provided with at least one venting channel, the two ends of which are respectively connected to the downstream end and the heat dissipation channel.

8. The compressor of claim 7, wherein, The compressor also includes a rotor, which passes through the second through hole. A first airflow gap is formed between the inner wall of the second through hole and the circumferential outer wall of the rotor. The venting channel is connected to the downstream end through the first airflow gap.

9. The compressor of claim 8, wherein, The main body has a plurality of grooves on the side opposite to the wear-resistant part. The grooves extend radially along the rotor and are arranged sequentially at intervals along the circumference of the rotor. Each groove defines a venting channel.

10. The compressor of claim 9, wherein, The heat dissipation channel extends circumferentially around the main body, and at least one vent hole is formed on the housing assembly. The heat dissipation channel and the vent hole are connected. Along the radial direction of the rotor, at least a portion of the heat dissipation channel overlaps with and communicates with any of the grooves.

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