Compressor adopting tapered runner groove

Abstract

The utility model relates to a compressor adopting a tapered runner groove, and belongs to the technical field of compressors. The air compressor comprises a low-pressure-stage machine body, a low-pressure exhaust end body and a high-pressure-stage machine body, the low-pressure-stage machine body, the low-pressure exhaust end body and the high-pressure-stage machine body are sequentially connected, the high-pressure-stage machine body comprises a high-pressure-stage shell, a motor and a high-pressure-stage male rotor, the motor is installed in the high-pressure-stage shell, the high-pressure-stage male rotor is connected with the motor, and the high-pressure-stage male rotor is installed in the high-pressure-stage shell. The compressor is characterized in that a plurality of flow channel grooves are evenly formed in the inner wall of the high-pressure stage shell, the direction from inlets of the flow channel grooves to outlets of the flow channel grooves is the same as the flowing direction of a compressed working medium, the flow channel grooves evenly surround the periphery of the high-pressure stage male rotor and the motor, and the width of the inlets of the flow channel grooves is larger than that of the outlets of the flow channel grooves. And the width of the runner groove is gradually reduced in the direction from the runner groove inlet to the runner groove outlet. The cooling device is reasonable in structural design and good in cooling effect on the downstream of the compressor.

Description

Technical Field

[0001] The utility model relates to a compressor, in particular to a compressor adopting a tapered flow channel groove, and belongs to the technical field of compressors. Background Art

[0002] When a compressor is running, the working fluid is continuously compressed as it is transported from the upstream to the downstream side of the compressor, causing the temperature of the working fluid to continue to rise. In addition, the downstream is closer to the heat source - the high-pressure stage rotor. When the high-pressure stage slide valve is unloaded, the hot air flow bypasses and heats the downstream motor coils. This leads to higher temperatures downstream of the compressor, requiring more cooling downstream. Currently, commonly used compressors have poor cooling effects on the downstream motor, resulting in insufficient and uneven cooling of the downstream motor, which reduces motor efficiency and the overall efficiency of the compressor. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a compressor with a tapered flow channel groove which has a reasonable structural design and a good cooling effect on the downstream of the compressor.

[0004] The technical solution adopted by the present invention to solve the above-mentioned problems is: the compressor adopting tapered flow grooves includes a low-pressure stage body, a low-pressure exhaust end body and a high-pressure stage body, and the low-pressure stage body, the low-pressure exhaust end body and the high-pressure stage body are connected in sequence, and the high-pressure stage body includes a high-pressure stage casing, a motor and a high-pressure stage male rotor, and the motor is installed in the high-pressure stage casing, and the high-pressure stage male rotor is connected to the motor. Its structural characteristics are: the inner wall of the high-pressure stage casing is evenly provided with a plurality of flow grooves, and the direction from the flow groove inlet to the flow groove outlet is the same as the flow direction of the compressed working medium, and the plurality of flow grooves are evenly surrounded by the high-pressure stage male rotor and the motor, the width of the flow groove inlet is greater than the width of the flow groove outlet, and the width of the flow groove gradually decreases along the direction from the flow groove inlet to the flow groove outlet.

[0005] Preferably, the width of the flow channel groove inlet of the present invention is 1.5 to 2 times the width of the flow channel groove outlet.

[0006] Preferably, the number of the flow channel grooves of the present invention is 4 to 20.

[0007] Compared with the existing technology, the present invention has the following advantages and effects: the structural design is reasonable, and the flow channel groove inside the high-pressure stage shell is used to allow the working fluid to pass through, thereby reducing the temperature of the motor. The control of the motor temperature is related to the flow rate of the working fluid. The flow channel groove adopts an inverted trapezoidal structure design that gradually shrinks along the direction from the flow channel groove inlet to the flow channel groove outlet. The working fluid flows in the gradually shrinking flow channel groove, and the flow rate continues to increase. The flow speed of the working fluid becomes faster, making the cooling effect of the motor downstream better. The motor is the core of the compressor drive. Under high evaporation and high condensation conditions, the operating range of the compressor is restricted by the temperature of the motor. The present invention improves the cooling effect of the motor and can effectively reduce the temperature of the motor, so it can broaden the operating range of the compressor, making the performance of the compressor more reliable under high evaporation and high condensation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments and / or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 It is a structural schematic diagram of a compressor using a tapered flow channel groove in an embodiment of the present utility model.

[0010] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle BB surface.

[0011] Figure 3 It is a structural schematic diagram of the high-pressure stage shell of an embodiment of the utility model.

[0012] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0013] Figure 5 It is a schematic diagram of the three-dimensional structure of the high-pressure stage casing of an embodiment of the utility model.

[0014] In the figure: 1-high-pressure stage housing; 2-motor; 3-high-pressure stage male rotor; 4-flow channel; 5-low-pressure stage body; 6-low-pressure exhaust end body; 7-high-pressure stage body. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0016] Example

[0017] See also Figures 1 to 5 The compressor using a tapered flow channel in this embodiment includes a low-pressure stage body 5, a low-pressure exhaust end body 6 and a high-pressure stage body 7. The low-pressure stage body 5, the low-pressure exhaust end body 6 and the high-pressure stage body 7 are connected in sequence. The high-pressure stage body 7 includes a high-pressure stage casing 1, a motor 2 and a high-pressure stage male rotor 3. The motor 2 is installed in the high-pressure stage casing 1, and the high-pressure stage male rotor 3 is connected to the motor 2.

[0018] The inner wall of the high-pressure stage shell 1 in this embodiment is evenly provided with several flow grooves 4. The direction from the inlet of the flow groove 4 to the outlet of the flow groove 4 is the same as the flow direction of the compressed working medium. Several flow grooves 4 are evenly surrounded by the high-pressure stage male rotor 3 and the motor 2. The width of the inlet of the flow groove 4 is greater than the width of the outlet of the flow groove 4. The width of the flow groove 4 gradually decreases along the direction from the inlet of the flow groove 4 to the outlet of the flow groove 4.

[0019] Typically, the width of the inlet of the flow channel groove 4 in this embodiment is 1.5 to 2 times the width of the outlet of the flow channel groove 4 , and the number of the flow channel grooves 4 is 4 to 20.

[0020] When the compressor using the tapered flow channel groove in this embodiment is running, the motor 2 drives the high-pressure stage male rotor 3 to start compressing the gas, and the gas flows from the low-pressure exhaust end body 6 to the high-pressure stage body 7. The gas flow rate in the tapered flow channel groove 4 continues to increase, actively increasing the flow rate of the downstream gas. When the gas passes through the motor 2, it absorbs the heat of the motor 2, improves the heat exchange efficiency, cools the motor 2, and makes the cooling downstream of the motor 2 more sufficient.

[0021] The compressor using the tapered flow channel groove in this embodiment has a good heat exchange effect at the flow channel groove 4, which effectively reduces the temperature of the motor 2 and avoids the situation where the efficiency of the motor 2 decreases due to the increase in the temperature of the motor 2. Therefore, the efficiency of the motor 2 can be improved, and the efficiency of the compressor can be improved. The use of the tapered flow channel groove 4 improves the heat exchange effect and reduces the temperature of the motor 2. It can suppress the upper limit of the temperature of the motor 2 under high evaporation and high condensation conditions, allowing the compressor to operate under high evaporation and high condensation conditions, thereby widening the operating range of the compressor. The use of the tapered flow channel groove 4 improves the heat exchange effect and reduces the temperature of the motor 2. Under the same operating conditions, the temperature of the motor 2 is lower and less likely to cause problems. Therefore, the reliability of the motor 2 is improved, and the reliability of the compressor is improved.

[0022] The high-pressure stage housing 1 in this embodiment can be cast using draft casting, facilitating casting production. The tapered runner groove 4 design offers draft advantages, reducing mold design and casting complexity. It also facilitates precision control of the casting surface, ensuring the casting runners are as close to the design target as possible and minimizing errors.

[0023] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is merely an example of the structure of the utility model. Any equivalent changes or simple changes made based on the structure, features and principles described in the concept of the utility model patent are included in the scope of protection of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should fall within the scope of protection of the utility model.

Claims

1. A compressor using a tapered flow channel groove, comprising a low-pressure stage body (5), a low-pressure exhaust end body (6) and a high-pressure stage body (7), wherein the low-pressure stage body (5), the low-pressure exhaust end body (6) and the high-pressure stage body (7) are connected in sequence, wherein the high-pressure stage body (7) comprises a high-pressure stage housing (1), a motor (2) and a high-pressure stage male rotor (3), wherein the motor (2) is installed in the high-pressure stage housing (1), and the high-pressure stage male rotor (3) is connected to the motor (2), characterized in that: The inner wall of the high-pressure stage housing (1) is evenly provided with a plurality of flow grooves (4), and the direction from the flow groove (4) inlet to the flow groove (4) outlet is the same as the flow direction of the compressed working medium. The plurality of flow grooves (4) are evenly arranged around the high-pressure stage male rotor (3) and the motor (2). The width of the flow groove (4) inlet is greater than the width of the flow groove (4) outlet, and the width of the flow groove (4) gradually decreases along the direction from the flow groove (4) inlet to the flow groove (4) outlet.

2. The compressor using a tapered flow channel according to claim 1, characterized in that: The width of the inlet of the flow channel groove (4) is 1.5 to 2 times the width of the outlet of the flow channel groove (4).

3. The compressor using a tapered flow channel according to claim 1, characterized in that: The number of the flow channel grooves (4) is 4 to 20.

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