High-sealing-performance oil tank of centrifugal compressor

Abstract

The utility model relates to the field of compressor design, in particular to a high-sealing oil tank of a centrifugal compressor, which comprises an oil tank upper cover and an oil tank bottom shell, two groups of connecting rings are respectively mounted on the oil tank upper cover and the oil tank bottom shell close to the end face, and mounting holes for mounting connecting bolts are correspondingly formed in the two groups of connecting rings. The close ends of the two sets of connecting rings are matched with the annular flanges through the annular grooves, the annular flanges are connected into the annular grooves in a joggling mode and extrude the sealing rings, positioning flanges are arranged on the end faces of one set of connecting rings, and positioning grooves allowing the positioning flanges to be inserted in a positioning mode are formed in the end faces of the other set of connecting rings. The positioning flange is inserted into the positioning groove, the oil tank upper cover and the oil tank bottom shell are prevented from deviating during installation, meanwhile, the joint of the annular flange and the annular groove is sealed through the sealing ring, and the sealing effect of the oil tank of the centrifugal compressor is improved.

Description

Technical Field

[0001] The utility model relates to the field of compressor design, in particular to a high-sealing oil tank of a centrifugal compressor. Background Art

[0002] The structure and operating principle of the centrifugal compressor are similar to those of the centrifugal blower. It can make the gas obtain a higher pressure. It has the advantages of large processing capacity and high processing efficiency. It is widely used in various process flows to transport air, various process gases or mixed gases and increase their pressure.

[0003] In order to reduce component wear and improve heat dissipation in centrifugal compressors, more lubricating oil is often injected into the compressor. In order to facilitate personnel to maintain the interior of the existing centrifugal compressor oil tank, an oil cover and an oil pan are often provided. The oil cover and the oil pan are fixedly connected by multiple sets of connecting bolts. At the same time, in order to avoid oil leakage between the oil cover and the oil pan, a sealing ring is often placed between the oil cover and the oil pan.

[0004] When the existing oil cover and the oil pan are combined, the joint surface is easily misaligned and deviated, resulting in insufficient extrusion of the sealing ring, which affects the sealing effect of the centrifugal compressor oil tank. Utility Model Content

[0005] The utility model aims to provide a centrifugal compressor oil tank with high sealing performance, which is used to solve the problem that when the existing oil cover and the oil pan are combined, the joint surface is easily misaligned and deviated, resulting in insufficient extrusion of the sealing ring, thus affecting the sealing effect of the centrifugal compressor oil tank.

[0006] To achieve the above-mentioned purpose, the utility model provides a centrifugal compressor high-sealing oil tank, including an oil tank cover and an oil tank bottom shell, the oil tank cover is buckled on the upper part of the oil tank bottom shell, the oil tank cover is provided with an intake pipe and an exhaust pipe, the bottom of the oil tank bottom shell is installed with a supporting base, the oil tank cover and the oil tank bottom shell are respectively installed with a group of connecting rings on the near end surfaces, the two groups of connecting rings are correspondingly provided with mounting holes for installing connecting bolts, the near ends of the two groups of connecting rings are matched with annular flanges through annular grooves, the annular flanges are mortised in the annular grooves and squeeze the sealing rings, one group of connecting rings is provided with a positioning flange on the end surface, and the other group of connecting rings is provided with a positioning groove on the end surface for the positioning flange to be inserted.

[0007] As a further solution of the utility model, the annular flange is further provided with an arc-shaped protrusion that presses against the sealing ring, and the bottom of the annular groove is arc-shaped.

[0008] As a further solution of the utility model, a placement groove for placing the sealing ring is provided in the annular groove.

[0009] As a further solution of the utility model, the cross section of the positioning flange is a trapezoid, and the corresponding cross section of the positioning groove is a trapezoid adapted for insertion of the positioning flange.

[0010] Compared with the prior art, the utility model has a group of connecting rings installed on the oil tank cover and the near end surface of the oil tank bottom shell respectively. The two groups of connecting rings are fixedly connected by multiple groups of connecting bolts. The near ends of the two groups of connecting rings cooperate with the annular flanges through annular grooves. A positioning flange is provided on the end surface of one group of connecting rings, and a positioning groove is provided on the end surface of the other group of connecting rings for the positioning flange to be inserted. The positioning flange is inserted into the positioning groove to avoid the oil tank cover and the oil tank bottom shell from being offset during installation. At the same time, the sealing ring is used to seal the connection between the annular flange and the annular groove to improve the sealing effect of the centrifugal compressor oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic structural diagram of a centrifugal compressor high-sealing oil tank.

[0012] Figure 2 This is a cross-sectional view of the installation of the connecting ring in the utility model.

[0013] Figure 3 It is a separated cross-sectional view of the connecting ring in the utility model.

[0014] In the accompanying drawings: 1. fuel tank cover; 101. air intake pipe; 102. exhaust pipe; 2. fuel tank bottom shell; 201. support base; 3. connecting ring; 301. annular groove; 302. positioning groove; 4. connecting bolts; 5. annular flange; 6. sealing ring; 7. positioning flange. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0016] like Figures 1 to 3As shown, in an embodiment of the utility model, a centrifugal compressor high-sealing oil tank comprises an oil tank upper cover 1 and an oil tank bottom shell 2, the oil tank upper cover 1 is buckled on the upper part of the oil tank bottom shell 2, an air inlet pipe 101 and an exhaust pipe 102 are arranged on the oil tank upper cover 1, a support base 201 is installed at the bottom of the oil tank bottom shell 2, a group of connecting rings 3 are respectively installed on the near end surfaces of the oil tank upper cover 1 and the oil tank bottom shell 2, two groups of connecting rings 3 are correspondingly provided with mounting holes for installing connecting bolts 4, the near ends of the two groups of connecting rings 3 are matched with annular flanges 5 through annular grooves 301, the annular flanges 5 are mortised in the annular grooves 301, and the sealing rings 6 are squeezed, a positioning flange 7 is provided on the end surface of one group of connecting rings 3, and a positioning groove 302 for positioning and inserting the positioning flange 7 is provided on the end surface of the other group of connecting rings 3;

[0017] Before the oil tank cover 1 and the oil tank bottom shell 2 are connected, the sealing ring 6 is placed at the bottom of the annular groove 301, and the oil tank cover 1 is connected to the bottom of the oil tank bottom shell 2, and the positioning flange 7 on the connecting ring 3 is inserted into another group of positioning grooves 302 to realize the connection and positioning of the two groups of connecting rings 3, and multiple groups of connecting bolts 4 are installed at the same time. During the installation process, the sealing ring 6 is squeezed by the annular flange 5 to deform it, and the connecting surface between the annular groove 301 and the annular flange 5 is sealed. At the same time, the positioning flange 7 is inserted into the positioning groove 302 for positioning, so as to avoid the problem that the sealing ring 6 is over-extruded during the installation process, which affects its service life.

[0018] like Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the annular flange 5 is further provided with an arc-shaped protrusion that presses against the sealing ring 6, and the bottom of the annular groove 301 is arc-shaped, so that when the annular flange 5 squeezes the sealing ring 6, it can avoid damaging the sealing ring 6;

[0019] Furthermore, a placement groove for the sealing ring 6 is provided in the annular groove 301, and the sealing ring 6 is positioned by the placement groove to prevent the sealing ring 6 from sliding out of the bottom of the annular groove 301 and deviating when the annular flange 5 squeezes the sealing ring 6, thereby affecting its sealing effect.

[0020] like Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the cross-section of the positioning flange 7 is a trapezoid, and the corresponding cross-section of the positioning groove 302 is a trapezoid for inserting the adapter flange. When the fuel tank cover 1 and the fuel tank bottom shell 2 are docked, the positioning flange 7 with a trapezoidal structure is easy to insert into the positioning groove 302.

[0021] In summary, in the utility model, a group of connecting rings 3 are respectively installed on the near end surfaces of the oil tank cover 1 and the oil tank bottom shell 2. While the two groups of connecting rings 3 are fixedly connected by multiple groups of connecting bolts 4, the near ends of the two groups of connecting rings 3 are matched with the annular flange 5 through the annular groove 301, and a positioning flange 7 is provided on the end surface of one group of the connecting rings 3, and a positioning groove 302 is provided on the end surface of the other group of the connecting rings 3 for the positioning flange 7 to be inserted. The positioning flange 7 is inserted into the positioning groove 302 to avoid the oil tank cover 1 and the oil tank bottom shell 2 from being offset during installation. At the same time, the sealing ring 6 is used to seal the connection between the annular flange 5 and the annular groove 301, thereby improving the sealing effect of the centrifugal compressor oil tank.

[0022] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A centrifugal compressor high-sealing oil tank, characterized in that: It includes a fuel tank cover and a fuel tank bottom shell, the fuel tank cover is buckled on the upper part of the fuel tank bottom shell, the fuel tank cover is provided with an intake pipe and an exhaust pipe, the bottom of the fuel tank bottom shell is installed with a supporting base, the fuel tank cover and the fuel tank bottom shell are respectively installed with a group of connecting rings on the near end surfaces, the two groups of connecting rings are correspondingly provided with mounting holes for installing connecting bolts, the near ends of the two groups of connecting rings are matched with annular flanges through annular grooves, the annular flanges are mortised in the annular grooves and squeeze the sealing rings, one group of connecting rings is provided with a positioning flange on the end surface, and the other group of connecting rings is provided with a positioning groove on the end surface for the positioning flange to be inserted.

2. A centrifugal compressor high-sealing oil tank according to claim 1, characterized in that: The annular flange is also provided with an arc-shaped protrusion that presses against the sealing ring, and the bottom of the annular groove is arc-shaped.

3. The centrifugal compressor high-sealing oil tank according to claim 1, characterized in that: A placement groove for placing the sealing ring is provided in the annular groove.

4. A centrifugal compressor high-sealing oil tank according to claim 3, characterized in that: The cross section of the positioning flange is a trapezoid, and the corresponding cross section of the positioning groove is a trapezoid adapted for insertion of the flange.

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