Reciprocating compressor body rear cover seal

Abstract

The utility model discloses a reciprocating compressor body rear cover seal which comprises a machine body rear cover and a crankshaft connected with the machine body rear cover, a partition plate is arranged on the outer wall of the machine body rear cover, shaft seals connected with the crankshaft are arranged on the two sides of the partition plate, an air inlet hole is formed in the partition plate, and a fixing assembly is arranged on the outer side of the partition plate. The utility model relates to the technical field of reciprocating compressors, which does not change the original structure, adds a partition plate and an oil seal, fills the space formed by the partition plate and a crankshaft with compressed air, and solves the hidden danger of oil leakage of the oil seal under the condition that the reciprocating compressor runs at high rotating speed for a long time. Compared with the prior art, the shaft seal adopts two shaft seals for sealing instead of one seal, and meanwhile, compressed air is arranged between the two shaft seals, so that the sealing effect is enhanced, the hidden danger of oil leakage of a rear cover of a machine body is eliminated, non-planned shutdown of equipment and economic loss are avoided, meanwhile, the requirements of the shaft seal can be reduced, the service life of the shaft seal is prolonged, and the shutdown frequency of the equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating compressor rear cover seals, in particular to a reciprocating compressor body rear cover seal. Background Art

[0002] With the increase of global energy consumption and the development of energy science and technology, the requirements for reciprocating compressors are getting higher and higher, especially for high-speed compressors. High speed brings the problem of compressor body rear cover sealing. The higher the compressor speed, the faster the shaft seal wears at the back of the body, and the higher the requirements for the shaft seal, the inevitable oil leakage. This requires the replacement of the shaft seal, resulting in unplanned downtime. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a reciprocating compressor body rear cover seal, which solves the problem that when the reciprocating compressor involves high rotation speed, the sealing condition of the body rear cover is directly affected. If the crankshaft rotation speed is high (the temperature is high), the wear rate of the shaft seal will be accelerated, resulting in premature oil leakage of the crankshaft.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a reciprocating compressor body rear cover seal, including a body rear cover and a crankshaft connected to the body rear cover, a partition is provided on the outer wall of the body rear cover, shaft seals connected to the crankshaft are provided on both sides of the partition, an air inlet hole is opened on the partition, and a fixing component is provided on the outer side of the partition.

[0005] Preferably, the fixing assembly includes a cover plate arranged on the outside of the partition, and the cover plate, the partition and the rear cover of the fuselage are connected by screws.

[0006] Beneficial Effects

[0007] The utility model discloses a reciprocating compressor body rear cover seal, which has the following beneficial effects:

[0008] 1. Without changing the original structure, a partition and an oil seal are added to fill the space formed by the partition and the crankshaft with compressed air (nitrogen), thus solving the hidden danger of oil seal leakage when the reciprocating compressor runs at high speed for a long time;

[0009] 2. The shaft seal is increased from one seal to two seals, and there is compressed air (nitrogen) in the middle to enhance the sealing effect;

[0010] 3. Eliminate the hidden danger of oil leakage from the rear cover of the machine body, avoid unplanned equipment shutdown and economic losses, and at the same time reduce the shaft seal requirements, extend the service life of the shaft seal, and reduce the number of equipment shutdowns. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a partially enlarged schematic diagram of the utility model.

[0013] In the figure: 1. crankshaft; 2. rear cover of the body; 3. shaft seal; 4. partition; 5. cover plate; 6. screws. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-2 The utility model provides a technical solution: a reciprocating compressor body rear cover 2 seal, including a body rear cover 2 and a crankshaft 1 connected to the body rear cover 2, a partition 4 is provided on the outer wall of the body rear cover 2, shaft seals 3 connected to the crankshaft 1 are provided on both sides of the partition 4, an air inlet hole is opened on the partition 4, and a fixing component is provided on the outer side of the partition 4.

[0016] By adopting the above technical solution, compressed air of a certain pressure is used for blowing. Since the compressed air enters the air inlet, the pre-leaked oil can be blown back by the pressure of the compressed air, thereby forming a seal.

[0017] The present embodiment is further configured such that the fixing assembly includes a cover plate 5 arranged outside the partition plate 4 , and the cover plate 5 , the partition plate 4 and the rear cover 2 of the body are connected by screws 6 .

[0018] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the field. The following mainly introduces the working principle and process.

[0019] Embodiment: When in use, the partition plate 4 and the cover plate 5 are fixed to the rear cover 2 of the fuselage by screws 6, and the shaft seals 3 are respectively located on both sides of the partition plate 4. A through air inlet hole is opened on the partition plate 4. Compressed air with a certain pressure is used for blowing, so that the compressed air enters the air inlet hole. The pressure of the compressed air blows back the pre-leaked oil, which can solve the oil leakage problem of the rear cover 2 of the fuselage;

[0020] In particular, a polytetrafluoroethylene ring or the like may be used to replace the shaft seal 3 for sealing, or other gases may be used for sealing.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reciprocating compressor body rear cover seal, comprising a body rear cover (2) and a crankshaft (1) connected to the body rear cover (2), characterized in that: A partition plate (4) is provided on the outer wall of the rear cover (2) of the fuselage, shaft seals (3) connected to the crankshaft (1) are provided on both sides of the partition plate (4), an air inlet hole is opened on the partition plate (4), and a fixing component is provided on the outer side of the partition plate (4).

2. A reciprocating compressor body rear cover seal according to claim 1, characterized in that: The fixing assembly comprises a cover plate (5) arranged on the outside of the partition plate (4); the cover plate (5), the partition plate (4) and the rear cover (2) of the body are connected by screws (6).

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