Novel auxiliary compressor unit

Abstract

The utility model discloses a novel auxiliary compressor unit, which comprises an oil-free compressor, an air suction filter, a cooler, an auxiliary compressor, an auxiliary compressor, an auxiliary compressor and an auxiliary compressor, and is characterized in that one end of the oil-free compressor is connected with the air suction filter; the other end of the cooler is connected with the fine filter through the air dryer; the fine filter is connected with an air outlet pipe to provide compressed air for external equipment of the unit; an exhaust port of the oil-free compressor is connected with the cooler through a high-pressure hose; air is filtered by the air suction filter, sucked into the oil-free compressor and compressed by the oil-free compressor and then reaches the cooler through the high-pressure hose, compressed air is cooled by the cooler, then reaches the air dryer and is changed into dry compressed air after full moisture absorption, and then the dry compressed air is changed into clean and dry compressed air through the fine filter. Finally, the air is fed into a pressure air cylinder outside the unit through an air outlet pipe of the fine filter. The utility model solves the problems of large volume, heavy weight, incapability of automatically running according to the use condition of compressed air, large vibration and high noise.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of auxiliary compressor unit, specifically a kind of auxiliary air supply system for electric locomotive, motor train unit, can provide the clean, dry compressed air required for bow raising. BACKGROUND

[0002] In the process of locomotive operation, an integrated compressor unit is needed to provide clean, dry compressed air to ensure the stable and reliable operation of locomotive vehicle, which is a powerful guarantee for the reliable operation of locomotive vehicle and an indispensable part of locomotive vehicle. However, the auxiliary air supply system currently used by people often cannot meet our needs.

[0003] The existing integrated compressor unit has the following disadvantages: 1. The integrated compressor unit in the prior art is large in size and weight, which cannot meet the space and weight requirements on the vehicle; 2. The existing integrated compressor unit does not have an air filtration device. The utility model needs to solve the problems of large size and weight of the auxiliary compressor unit, non-compliance of the air quality of the auxiliary compressor unit, inability of the auxiliary compressor unit to automatically control the operating state according to the use of compressed air, and excessive vibration and noise during operation of the auxiliary compressor unit, which can be clearly felt inside the vehicle and affects the use experience.

[0004] Therefore, the utility model relates to a lightweight integrated compressor unit to solve the above technical defects. SUMMARY

[0005] In view of the shortcomings of the prior art, the utility model provides a new type of auxiliary compressor unit, which solves the problems of large size and weight, inability to automatically operate according to the use of compressed air, and large vibration and noise.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A new type of auxiliary compressor unit includes an air suction filter, an oil-free compressor, a high-pressure hose, a cooler, an air dryer, a safety valve, a fine filter, a regeneration air cylinder, a test connector, a machine shell, an air outlet pipe, a backflush pipe, and a rubber shock pad.

[0008] One end of the oil-free compressor is connected to the air suction filter, and the other end is connected to the cooler; the other end of the cooler is connected to the air dryer and the fine filter; the fine filter provides compressed air to the external equipment of the unit through the air outlet pipe.

[0009] Further, a safety valve is provided between the air dryer and the fine filter; the safety valve can prevent the air pressure inside the unit from being too high and protect the internal components of the unit.

[0010] Further, a test joint is connected in parallel between the air outlet of the fine filter and the air outlet pipe.

[0011] Further, the regeneration port of the air dryer is connected to a regeneration air cylinder; the regeneration air cylinder can backflush the air dryer to regenerate the drying agent.

[0012] Further, the oil-free compressor, the safety valve, the cooler, the fine filter, the air dryer, the test joint and the regeneration air cylinder are integrated in the same box, i.e., in the machine housing.

[0013] Further, the machine housing adopts a base frame structure. The force frame of the machine housing is made of 4mm stainless steel plate by bending and welding, and various internal components are mounted on the machine housing frame. Other positions of the machine housing adopt a punching mode to reduce weight.

[0014] Further, the oil-free compressor selects a direct current motor to facilitate power supply of the compressor.

[0015] Further, a rubber damping pad is arranged between the mounting foot of the oil-free compressor and the machine housing, and a high-pressure hose is connected between the exhaust port of the oil-free compressor and the cooler.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model is an auxiliary compressor unit, small in size, high in integration degree and good in reliability, and has the following characteristics:

[0018] 1) The machine housing is designed to be lightweight, and the structure is optimized. Under the premise of meeting the integration function requirements and strength requirements of the auxiliary compressor unit, the weight of the machine housing is reduced as much as possible. The integration technology is adopted to combine and install the compressor, the cooler, the filter, the safety valve and the air dryer into the same machine housing, so that the integration degree of the auxiliary compressor unit is improved. The size of the machine housing is greatly reduced, and the weight is greatly reduced on the basis of the original. The demand for equipment integration and lightweight is met.

[0019] 2) The compressor is a full-oil-free piston structure, without liquid lubricating oil, and completely avoids pollution of compressed air by oil mist and oil vapor. The eccentric block is directly sleeved on the motor shaft to act as a crankshaft, and this structure greatly reduces the axial size of the compressor. The piston ring, as a key component of the compressor, is made of imported filled polytetrafluoroethylene material with excellent self-lubricating performance and small friction coefficient with the cylinder wall; the piston ring has good thermal conductivity and mechanical strength, and maximizes the service life. According to the calculation, under the existing use conditions of the railway locomotive auxiliary compressor unit, the piston ring can be operated indefinitely.

[0020] 3) Auxiliary compressor set start-stop by external control, customers can adjust the start and stop state according to demand.

[0021] 4) The rubber shock pad is arranged between the compressor mounting foot and the shell, and the high-pressure hose is connected between the compressor exhaust port and the cooler, so that the vibration of the compressor transmitted to the shell and the pipeline is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the front view of the whole machine structure of the auxiliary compressor set of the utility model;

[0023] Figure 2 It is the left view of the whole machine structure of the auxiliary compressor set of the utility model;

[0024] Figure 3 It is the top view of the whole machine structure of the auxiliary compressor set of the utility model;

[0025] Figure 4 It is the schematic diagram of the gas path connection of the auxiliary compressor set of the utility model;

[0026] Among them, 1 - air suction filter, 2 - oil-free compressor, 3 - high-pressure hose, 4 - cooler, 5 - air dryer, 6 - safety valve, 7 - fine filter, 8 - regeneration air cylinder, 9 - test joint, 10 - shell, 11 - air outlet pipe, 12 - back flushing pipe, 13 - rubber shock pad. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and effect of the utility model more clear, the utility model is further explained in detail by the following examples.

[0028] A novel auxiliary compressor set ( Figures 1 to 3 As shown), the basic composition of the utility model includes air suction filter 1, oil-free compressor 2, high-pressure hose 3, cooler 4, air dryer 5, safety valve 6, fine filter 7, regeneration air cylinder 8, test joint 9, shell 10, air outlet pipe 11, back flushing pipe 12, rubber shock pad 13.

[0029] Air is sucked into the oil-free compressor 2 through the air filter 1, compressed by the oil-free compressor 2, and reaches the cooler 4 through the high-pressure hose 3. The compressed air is cooled by the cooler 4 and reaches the air dryer 5. After being fully dehumidified, the compressed air becomes dry, and then passes through the fine filter 7 to become clean and dry compressed air. Finally, the clean and dry compressed air is sent to the pressure cylinder of the bow system outside the compressor unit through the air outlet pipe 11. The safety valve 6 functions as a safety protection system when the pressure of the compressor unit is abnormal (exceeding the take-off pressure of 0.9 MPa). A test joint 9 is connected in parallel at the outlet of the fine filter 7, which can be used to detect the pressure inside the compressor unit by connecting test instruments externally.

[0030] The pressure cylinder of the bow system is not part of the compressor unit. The start and stop of the compressor need to be controlled by the control system outside the compressor unit.

[0031] The air outlet of the air dryer 5 reaches the dryer regeneration pressure. After the oil-free compressor is stopped (the start-stop system is controlled externally), the compressed air at the air outlet of the air dryer passes through the built-in valve, opens the air dryer blow valve, and the dry air from the regeneration air cylinder 8 blows back through the blowback pipe 12 to regenerate the dryer 5. The dryer, and then through the air dryer blow valve and the silencer, is discharged into the atmosphere, while the accumulated water is discharged. The dryer has a heating rod, which works at low temperature to prevent the water in the dryer from freezing.

[0032] Temperature control elements are installed on the cylinder head of the compressor and inside the motor. When the temperature of the compressor or motor exceeds the specified range, the compressor unit will be immediately powered off.

[0033] The oil-free compressor 2 uses a direct current motor, which is convenient for the compressor to take power. The compressor is a full-oil-free piston structure without liquid lubricating oil, completely avoiding the pollution of compressed air by oil mist and oil vapor.

[0034] A rubber shock pad 13 is provided between the compressor mounting foot and the casing 10. The oil-free compressor 2 exhaust port and the cooler 4 are connected by a high-pressure hose 3, which reduces the vibration of the compressor transmitted to the tank and the pipeline;

[0035] As Figure 4As shown, in the working time, the oil-free compressor 2 runs to compress air to the required pressure. The compressed air reaches the cooler 4 through the high-pressure hose 3, and the compressed air is cooled by the cooler 4 and reaches the air dryer 5, and after being fully dehumidified, the compressed air becomes dry, and then passes through the fine filter 7 to become clean and dry compressed air, and finally through the air outlet pipe 11 into the pressure air cylinder of the arch raising system outside the unit. The air outlet of the air dryer 5 reaches the dryer regeneration pressure, and when the oil-free compressor is stopped (the start-stop system is controlled externally), the compressed air at the air outlet of the dryer passes through the built-in valve, opens the dryer blow valve, and the dry air from the regeneration air cylinder 8 blows the dryer to regenerate the dryer, and then through the blow valve and the silencer of the dryer. Discharge into the atmosphere, while discharging the accumulated water, the dryer has a heating rod, which works at low temperature to prevent the water in the dryer from freezing.

[0036] In summary, the utility model in the using, the start and stop of the compressor need to be controlled by the control system outside the compressor unit. The test connector 9 arranged at the same time can be externally connected to the test instrument, and the debugging personnel can monitor the internal pressure of the unit in real time. The chassis 10 adopts a base frame structure, is made of 4mm stainless steel plate, and adopts a punching mode, which not only ensures the strength of the chassis 10 and meets the vehicle impact vibration requirements, but also greatly reduces the weight of the whole machine. The leather cup type piston ring used in the oil-free compressor 2 is filled with polytetrafluoroethylene material with imported formula, which has excellent self-lubricating performance and small friction coefficient with the cylinder wall; has good thermal conductivity and mechanical strength, maximizes the service life, and according to the calculation, under the existing use conditions of the railway locomotive auxiliary compressor unit, the piston ring can be operated indefinitely. Rubber shock pad 13 is arranged between the mounting foot of the oil-free compressor 2 and the chassis 10, and high-pressure hose 3 is connected between the exhaust port of the oil-free compressor 2 and the cooler 4, which effectively blocks the vibration generated by the compressor during operation and reduces the transmission of vibration to the vehicle;

[0037] The performance of the auxiliary compressor unit is as follows:

[0038] The use voltage is 110VDC (-30%~+25%); the rated exhaust volume is greater than or equal to 50L / min (the air suction state is 100kPa (absolute pressure), and the environmental temperature is 20, ℃ under the condition of exhaust pressure 800kPa); the maximum exhaust pressure is 1.0Mpa; the safety valve take-off pressure is 0.9±0.02MPa; the rated power is 880W; the weight is less than or equal to 42kg±3%kg; the working environment temperature is -40~+70, ℃; the noise (1m sound pressure level) is less than or equal to 88dB(A); and the compressed air quality solid particle level at the outlet meets the standards of ISO8573, including particle level 3, oil level 2 and water level 3.

[0039] The above merely is the preferred embodiment of the present application, it should be pointed out that, for ordinary skilled person in the art, without departing from the principles of the present application, can make a number of improvements, these improvements also should be considered as the protection scope of the present application.

Claims

1. A new type of auxiliary compressor unit, characterized in that: The auxiliary compressor unit comprises: an oil-free compressor (2), one end of the oil-free compressor (2) is connected to an air intake filter (1), and the other end of the oil-free compressor (2) is connected to a cooler (4); the other end of the cooler (4) is connected to a fine filter (7) via an air dryer (5); the fine filter (7) is connected to provide compressed air to external equipment of the unit through an air outlet pipe; the exhaust port of the oil-free compressor (2) and the cooler (4) are connected by a high-pressure hose (3); The air is filtered by the air intake filter (1) and sucked into the oil-free compressor (2). After being compressed by the oil-free compressor (2), the air reaches the cooler (4) through the high-pressure hose (3). The compressed air is cooled by the cooler (4) and reaches the air dryer (5). After being fully hydrated, the compressed air becomes dry compressed air. The air then passes through the fine filter (7) and becomes clean and dry compressed air. Finally, the air is sent to the pressure cylinder outside the unit through the outlet pipe (11) of the fine filter (7).

2. A novel auxiliary compressor unit according to claim 1, characterized in that: A safety valve (6) is provided between the air dryer (5) and the fine filter (7); the safety valve (6) prevents the air pressure inside the unit from being too high, thereby protecting the internal components of the unit.

3. A novel auxiliary compressor unit according to claim 2, characterized in that: When the unit pressure is abnormal, that is, exceeds the trip pressure of 0.9 MPa, the safety protection system is activated by the safety valve (6).

4. A novel auxiliary compressor unit according to claim 1, characterized in that: The fine filter (7) is provided with an air outlet and an air outlet pipe (11), and a test joint (9) is connected in parallel between the air outlet and the air outlet pipe (11); the internal pressure of the unit is measured through the test joint (9).

5. A novel auxiliary compressor unit according to claim 3, characterized in that: The oil-free compressor (2), safety valve (6), cooler (4), fine filter (7), air dryer (5), test connector (9), and regeneration air cylinder (8) are integrated in the casing (10).

6. A novel auxiliary compressor unit according to claim 5, characterized in that: The casing (10) adopts a base frame structure; the casing force frame is made of 4mm stainless steel plates bent and welded, and all internal components are installed on the base frame structure. Other positions of the casing are punched to reduce weight.

7. A novel auxiliary compressor unit according to claim 1, characterized in that: The oil-free compressor (2) uses a DC motor to facilitate power supply to the compressor.

8. A novel auxiliary compressor unit according to claim 6, characterized in that: A rubber shock-absorbing pad (13) is provided between the mounting foot of the oil-free compressor (2) and the casing (10).

9. A novel auxiliary compressor unit according to claim 1, characterized in that: The regeneration port of the air dryer (5) is connected to the regeneration air cylinder (8); the air dryer is back-blown through the regeneration air cylinder (8) to regenerate the desiccant; the air outlet of the air dryer (5) reaches the regeneration pressure of the dryer, and after the oil-free compressor stops, the compressed air at the dryer outlet passes through the built-in valve, opens the drain valve of the dryer, and the dry air coming out of the regeneration air cylinder (8) passes through the back-blowing pipe (12) to back-blow the air dryer (5), regenerating the desiccant, and then is discharged into the atmosphere through the drain valve and silencer of the dryer, while the accumulated water is discharged. The dryer is provided with a heating rod, which works at low temperatures to prevent the water in the dryer from freezing.

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