CN210218125U - Dry ash air compressor with self-cooling function - Google Patents

Abstract

The utility model provides a dry ash air compressor machine with from cooling function, include: a compressor host; the air suction assembly comprises an air filter, an air inlet valve and a connecting pipe, wherein an air inlet of the air filter is communicated with the atmosphere, and an air outlet of the air filter is communicated with a working cavity of the compressor main machine through the air inlet valve; the cooling assembly comprises an oil cooler and an after cooler, a cooling inlet of the oil cooler is communicated with a liquid outlet of the oil-gas separator, and a cooling outlet of the oil cooler is communicated with the working cavity; and a cooling inlet of the aftercooler is communicated with an outlet of the minimum pressure valve, and a cooling outlet of the aftercooler is communicated with the atmosphere. Through the two-stage cooling, reduced the temperature of working chamber and inside spare part, realized self-cooling, compared with natural cooling, adopted the cooling efficiency behind the auxiliary cooling equipment higher, and the cooling effect is better.

Description

Dry ash air compressor with self-cooling function

Technical Field

The utility model relates to a power plant equipment technical field, concretely relates to dry ash air compressor machine with from cooling function.

Background

The dry ash air compressor mainly comprises a main machine, a motor, an oil-gas separator, an oil cooler, a post cooler, a machine set base and other parts, and is sealed in a sound insulation cover. Within the compressor housing is a pair of precision machined intermeshing rotors, wherein the male rotor has four teeth and the female rotor has six teeth. The motor drives the male rotor through the elastic coupling, and then the male rotor drives the female rotor to rotate at high speed together. Along with the continuous reduction of the interdental volume, the air sucked from the air filter is continuously compressed to increase the pressure, and when the interdental volume is communicated with an exhaust port of the compressor, the compressed air is discharged from the exhaust port and enters the oil-gas separator for oil-gas separation. The gas after oil-gas separation is discharged out of the machine through the minimum pressure valve, the aftercooler and the drain valve in sequence for customers to use. The separated lubricating oil is settled to the bottom of the oil-gas separator, cooled and returned to the working cavity of the main machine for recycling under the action of pressure difference. When each main part of dry ash air compressor machine moves, can produce great heat, current dry ash air compressor machine does not possess to self generate heat and the cooling arrangement who sets up, can only dispel the heat through natural cooling's mode, and the radiating effect is relatively poor, and the heat dissipation cycle is longer.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to solve at least one of the above problems, and the object is achieved by the following technical solutions.

The utility model provides a dry ash air compressor machine with from cooling function, include:

a compressor host;

the air suction assembly comprises an air filter, an air inlet valve and a connecting pipe, wherein an air inlet of the air filter is communicated with the atmosphere, and an air outlet of the air filter is communicated with a working cavity of the compressor main machine through the air inlet valve;

the exhaust assembly comprises an oil-gas separator, a minimum pressure valve, a safety valve, an air release valve, a gas-water separator and a connecting pipeline, wherein an exhaust port of the working cavity is communicated with the oil-gas separator, a gas outlet of the oil-gas separator is communicated with the atmosphere through the connecting pipeline, and the minimum pressure valve, the safety valve and the air release valve are arranged on one side of the connecting pipeline;

the oil-gas separator is communicated with the working cavity through the thermal valve and the oil filter;

the cooling assembly comprises an oil cooler and an after cooler, a cooling inlet of the oil cooler is communicated with a liquid outlet of the oil-gas separator, and a cooling outlet of the oil cooler is communicated with the working cavity; and a cooling inlet of the aftercooler is communicated with an outlet of the minimum pressure valve, and a cooling outlet of the aftercooler is communicated with the atmosphere.

In the working process, the air separated by the oil-gas separator is cooled by the aftercooler and then discharged, and meanwhile, the lubricating oil obtained after separation enters the working cavity after being cooled by the oil cooler, so that the temperature of the working cavity and internal parts is reduced through two-stage cooling, self-cooling is realized, and compared with natural cooling, the auxiliary cooling equipment is adopted, the cooling efficiency is higher, and the cooling effect is better.

Further, the after cooler is a finned air heat exchanger.

Further, the oil cooler is a finned lubricating oil heat exchanger.

Further, still include and be used for the oil cooler cooling first cooling fan, first cooling fan sets up in the side of oil cooler.

Further, still include for the aftercooler cooling second cooling fan, second cooling fan set up in the side of aftercooler.

Further, still include inverter motor, first cooling fan and second cooling fan all pass through inverter motor drives.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a specific embodiment of a dry ash air compressor provided by the present invention;

fig. 2 is a plan view of the dry ash air compressor shown in fig. 1.

Description of reference numerals:

01-motor 02-base 03-shock absorber 04-compressor host 05-electric cabinet 06-coupler

07-air filter 08-machine head 09-oil-gas separator 10-oil cooler 11-drain valve

12-fan motor 13-air inlet valve 14-minimum pressure valve 15-safety valve

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, fig. 1 is a front view of a specific embodiment of a dry ash air compressor according to the present invention; fig. 2 is a plan view of the dry ash air compressor shown in fig. 1.

In a specific embodiment, the utility model provides a dry grey air compressor machine with from cooling function, this dry grey air compressor machine include compressor host 04, the subassembly of breathing in, exhaust subassembly, oil circuit subassembly and cooling module, except in addition, still including other spare parts that can realize dry grey air compressor machine function, for example main motor 01, base 02, bumper shock absorber 03, electricity cabinet 05, shaft coupling 06, aircraft nose 08 and bleeder 11 isotructures, the structure and the function of these parts are the same with prior art, and with the utility model discloses an it is irrelevant, therefore do not describe any more, only show in attached figure 1 and figure 2. The air suction assembly comprises an air filter, an air inlet valve 13 and a connecting pipe, wherein an air inlet of the air filter is communicated with the atmosphere, and an air outlet of the air filter is communicated with a working cavity of the compressor main machine 04 through the air inlet valve 13; the exhaust assembly comprises an oil-gas separator 09, a minimum pressure valve 14, a safety valve 15, an air release valve, a gas-water separator and a connecting pipeline, an exhaust port of the working cavity is communicated with the oil-gas separator 09, a gas outlet of the oil-gas separator 09 is communicated with the atmosphere through the connecting pipeline, and the minimum pressure valve 14, the safety valve 15 and the air release valve are arranged on one side of the connecting pipeline; the oil way assembly comprises a thermal valve and an oil filter, and the oil-gas separator 09 is communicated with the working cavity through the thermal valve and the oil filter; the cooling assembly comprises an oil cooler 10 and an after cooler, a cooling inlet of the oil cooler 10 is communicated with a liquid outlet of the oil-gas separator 09, and a cooling outlet of the oil cooler is communicated with the working cavity; the cooling inlet of the aftercooler is in communication with the outlet of the minimum pressure valve 14 and the cooling outlet of the aftercooler is in communication with the atmosphere.

Specifically, the after-cooler is a finned air heat exchanger and the oil cooler 10 is a finned lubricating oil heat exchanger to improve heat exchange performance. Cooling unit still including be used for the first cooling fan of oil cooler 10 cooling and be used for doing the second cooling fan of aftercooler cooling, first cooling fan set up in the side of oil cooler 10, second cooling fan set up in the side of aftercooler, first cooling fan with second cooling fan all drives through inverter motor 01.

In operation, a pair of precision machined intermeshing rotors, with four teeth on the male rotor and six teeth on the female rotor, are located within the body of the compressor. The motor 01 drives the male rotor through the elastic coupling 06, and then the male rotor drives the female rotor to rotate together at a high speed. With the continuous reduction of the volume between the teeth, the air sucked from the air filter is continuously compressed to increase the pressure, and when the volume between the teeth is communicated with the exhaust port of the compressor, the compressed air is discharged from the exhaust port and enters the oil-gas separator 09 to be subjected to oil-gas separation. The gas after oil-gas separation passes through the minimum pressure valve 14, the aftercooler and the drain valve 11 in sequence and is discharged out of the machine for customers to use. The separated lubricating oil is settled to the bottom of the oil-gas separator 09, and is cooled and then returned to the working cavity of the main machine for recycling under the action of pressure difference. The air separated by the oil-gas separator 09 is cooled by the aftercooler and then discharged, and meanwhile, the separated lubricating oil is cooled by the oil cooler 10 and then enters the working cavity, so that the temperatures of the working cavity and internal parts are reduced through two-stage cooling, self-cooling is realized, and compared with natural cooling, the auxiliary cooling equipment is adopted, the self-cooling device has high cooling efficiency and good cooling effect.

Specifically, the suction module mainly comprises an air cleaner, an air inlet valve 13, a compressor main unit 04, an elbow, a connecting pipe and the like. When the unit normally operates, air is sucked in from the air inlet of the air filter, filtered and enters the working cavity of the compressor through the opened air inlet valve 13, and is compressed by the female rotor and the male rotor which rotate at high speed to increase pressure, and when the volume between the teeth is communicated with the exhaust port, the air is exhausted from the exhaust port of the compressor. The air filter is used for filtering sucked air and ensuring that the air entering the compressor is clean. If the air is taken in with impurities, it causes wear of the rotor profile and contamination of the lubricating oil. Maintenance of the air filter 07 or the use of a replacement filter cartridge out of order will reduce the useful life of the lubricating oil and gas separation filter cartridge and will lose its warranty. The intake valve 13 functions to control the intake air amount. When the unit is running at full load, the air inlet valve 13 is in a full open state. When the air consumption required by the user is reduced, the air quantity adjusting device inputs compressed air to the air inlet valve 13, so that the opening degree of the air inlet valve 13 is reduced, and the air inlet quantity of the compressor is reduced. When the user stops using the air, the air inlet valve 13 is closed, the air inlet is stopped, and the compressor enters an idle running state. When the user resumes the use of air, the adjustment device in turn adjusts the inlet valve 13 to reopen.

The working process of the exhaust assembly is that the exhaust assembly consists of a compressor, an oil-gas separator 09, a minimum pressure valve 14, a safety valve 15, an emptying valve, an aftercooler, a gas-water separator and a connecting pipeline. The oil-gas mixture compressed by the compressor enters the oil-gas separator 09 through the discharge port of the compressor to separate the lubricating oil from the compressed air, so that clean compressed air is obtained. The compressed air after oil-gas separation passes through the minimum pressure valve 14 and then sequentially enters the aftercooler and the gas-water separator, the high-temperature gas is cooled to normal temperature, condensed water in the compressed air is separated out, and finally the compressed air is discharged out of the machine for users to use. One end of the gas-water separator is provided with a spare flange for an external exhaust pipe. Before the user uses the machine, use

The seamless steel pipe can lead out the compressed air by welding the seamless steel pipe on the standby flange, and a stop valve is required to be arranged on an external air pipeline in the using process. The minimum pressure valve 14 is located above the oil-gas separator 09 and has the function of ensuring that the pressure in the oil-gas separator 09 is not lower than 0.34MPa, so that the lubricating oil can normally run in an oil pipeline, and the oil consumption can be reduced. The minimum pressure valve 14 will therefore only open when the pressure in the separator is greater than 0.34MPa and at the same time above the line pressure. Secondly, the minimum pressure valve 14 can also function as a check valve when the compressor is used in a networked manner, preventing compressed air in the pipe network from flowing back to the separator and the host when the compressor is unloaded. An automatic air release valve is arranged beside the minimum pressure valve 14. When the compressor is unloaded or stopped, the emptying valve is automatically opened, so that the oil-gas separator 09 is communicated with the atmosphere, and the air is discharged for pressure relief. The emptying valve is provided with a silencer and is usedTo reduce the noise generated by the exhaust. The gas-water separator is used for separating condensed water from the compressed air. The bottom of the air-water separator of the air-cooling unit is provided with a floating ball type automatic drainage device, the water-cooling unit is provided with a reliable electronic drainage valve, the drainage time is set to be 5 seconds when the water-cooling unit leaves a factory, the interval time is 5-10 minutes, and a client can further adjust the water-cooling unit according to the local humidity condition. Meanwhile, the machine is also provided with a manual drain valve, and if the electronic drain valve fails, temporary drainage can be performed through the manual drain valve. The operator should observe regularly whether there is water to be discharged. Generally, in summer, the temperature is high, the humidity is high, and the amount of discharged water is large. In winter, the temperature is low, the humidity is low, and the discharged water is less. If no water is discharged, indicating that the trap 11 is blocked, it is removed for cleaning and dredging the drain line. The oil-gas separator 09 is provided with a safety valve 15. When the pressure in the separator exceeds the set pressure, the safety valve 15 can be automatically opened, and the air is rapidly released, so that the safety of the unit is ensured. The unit is also provided with a high-voltage shutdown switch. The automatic stop is performed when the pressure in the air-oil separator 09 reaches the set pressure. Therefore, the safety valve 15 is not opened under normal conditions.

The working process of the oil way assembly is that the oil way system consists of a compressor, an oil-gas separator 09, a thermal valve (only a water cooling unit), an oil cooler 10, an oil filter and corresponding connecting pipelines. The lubricating oil in the oil-gas separator 09 enters the oil cooler 10 through a thermal valve (only a water cooling unit), the cooled lubricating oil enters the working cavity of the main machine through a tee joint and an oil filter, is compressed together with the sucked air, is discharged out of the machine body, and enters the oil-gas separator 09 to complete a cycle. The role of lubricating oil is embodied in three aspects: (1) and (6) cooling. The lubricating oil sprayed into the machine body can absorb a large amount of heat generated by air in the compression process, so that the cooling effect is achieved. (2) And (6) lubricating. The lubricating oil forms a layer of oil film between the two rotors to avoid direct contact between the male and female rotors, thereby avoiding the abrasion of the profiles of the rotors. Furthermore, the oil reaches each lubrication point through the internal oil passage, lubricating the bearings and the gears. (3) And (5) sealing. The lubricating oil with certain viscosity can fill the gap between the rotor and the casing, so as to reduce the leakage loss inside the compressor and raise the volume efficiency of the compressor.

The thermal valve is used for adjusting oil injection temperature and avoiding oil quality change caused by water analysis in a low-temperature environment. The thermal valve has a bypass valve in its interior, which is normally open. When the oil temperature is low, the thermal valve does not act, and the lubricating oil directly enters the working cavity of the main machine through the bypass valve, the bypass oil pipe, the tee joint and the oil filter without being cooled. When the oil temperature rises, the thermal valve is opened and the bypass valve is gradually closed, and the lubricating oil enters the oil cooler 10 to be cooled. Then enters the working cavity of the main machine through the tee joint and the oil filter. The oil filter is used for filtering impurities in the lubricating oil so as to ensure that the clean lubricating oil enters the working cavity of the main machine and all lubricating points. If the lubricating oil contains impurities, it will cause wear of the rotor profile, gear mesh surfaces and bearings, reducing the life of the compressor. The filter element of the oil filter should be replaced regularly to ensure the oil circuit is smooth. And a differential pressure sensor is arranged at the top of the oil filter. When the pressure difference between the front and the back of the filter element exceeds the set pressure (0.14MPa), a maintenance signal is displayed on a panel of the monitor, and the operator of the unit is reminded to replace the filter element in time. Two paths of oil return pipes are arranged on the top cover of the oil-gas separator 09, and a small amount of lubricating oil at the bottoms of the primary filter element and the secondary filter element is recycled into the compressor body respectively. An oil sight glass is arranged on the oil return pipe for an operator to observe the oil return condition. When the compressor is fully loaded, the flow rate is large, when the compressor is unloaded, the flow rate is small or even zero, and if the compressor is fully loaded, the compressor is stopped to stop working and the pressure is relieved, and then the oil return filter is cleaned. The oil-gas separator 09 comprises a tank body and two filter elements, wherein the two filter elements comprise a primary filter element and a secondary filter element.

The function of the oil-gas separator 09 is embodied in four aspects:

(1) as a primary separator.

After entering the oil-gas separator 09, the oil-gas mixture from the main engine rotates at high speed along the outer wall of the cylinder outside the filter element, and then is subjected to mechanical centrifugal separation and impacts a wall baffle arranged in the separator, so that the flow rate is reduced, and larger oil drops are formed. Due to the weight of the oil droplets themselves, they mostly settle to the bottom of the separator.

(2) The oil storage tank is used for storing lubricating oil.

(3) And (5) carrying out fine separation. The tank body is internally provided with a double-layer nested filter element, namely a primary filter element and a secondary filter element. The oil-gas mixture entering the tank body is subjected to centrifugal separation and impact separation, and then passes through the two filter elements for fine separation, so that a small amount of lubricating oil remained in the compressed air is separated out and accumulated at the bottom of the filter elements. Then returns to the air inlet of the main machine through two oil return pipes respectively and is sucked into the working cavity.

(4) And (5) stabilizing the pressure.

Because the oil-gas separator 09 can store a certain amount of gas, pressure fluctuation in a user pipeline can be effectively avoided, and the effect of stabilizing the pressure is achieved.

Because some impurities exist in the oil circuit system more or less, after the filter element works for a period of time, the blockage phenomenon can occur, so that the resistance of the compressed air passing through the filter element is increased, and the normal work of the unit is influenced. Therefore, the operator should replace the filter element in time according to the signal displayed on the controller panel.

An oil filling pipe and an oil sight glass are arranged at the outward end of the oil-gas separator 09. Since the discharge compressed air contains more or less compressor oil, the oil level in the separator will decrease after a certain period of compressor operation, requiring replenishment. The normal oil level when the compressor is not operating should be below the center of the upper sight glass.

The working process of the cooling assembly comprises an oil cooler 10, an after cooler, a cooling fan, a fan motor 12 and a connecting part, wherein the air cooler is provided with 2 fans which are respectively used for cooling the oil cooler 10 and the after cooler. The fan motor 12 facing the oil cooler 10 is driven by a frequency converter, and the other fan and the motor 01 are driven by a power frequency power supply. The working principle of the frequency converter is that the required value of the exhaust temperature of the compressor is set, because the change of the environment temperature, the load and the like inevitably causes the change of the exhaust temperature, the frequency converter automatically adjusts the frequency output value according to the change of the temperature, changes the rotating speed of the motor 01, namely changes the cooling air volume, thereby reducing the change of the exhaust temperature, and finally, the effect is that the exhaust temperature fluctuates in a narrow range around the original set value. The compressor operates stably under various environments and load working conditions, the frequency converter plays an important role in the compressor, and the frequency converter also plays roles in noise reduction and energy saving when the fan and the motor 01 operate at low speed.

The after cooler is a fin heat exchanger, and has the function of cooling the compressed air. The high temperature and high pressure gas exiting the minimum pressure valve 14 enters the aftercooler and transfers most of the heat to the cooling air, thereby obtaining compressed air at a lower temperature. The oil cooler 10 is also a fin heat exchanger, and its function is to cool lubricating oil. The lubricant oil from the gas-oil separator 09, after entering the oil cooler 10, transfers a portion of the heat to the cooling air and then enters the compressor working chamber.

During operation, the cooling water first enters the aftercooler, then enters the oil cooler 10, and finally is discharged out of the machine. The aftercooler is a shell-and-tube heat exchanger, the function of which is to cool the compressed air. The high-temperature and high-pressure gas from the minimum pressure valve 14 enters the aftercooler and transfers most of the heat to the cooling water, thereby obtaining the compressed air at normal temperature. The oil cooler 10 is also a shell-and-tube heat exchanger, and its function is to cool the lubricating oil. The lubricating oil from the gas-oil separator 09 passes through the thermal valve and enters the oil cooler 10, and then transfers a part of heat to the cooling water, and then enters the working chamber of the compressor.

In order to maintain a good heat exchange effect of the cooler for a long time and to extend the service life of the cooler, clean cooling water must be used.

The specific requirements are as follows:

(1) the cooling water should be nearly neutral, i.e. the pH value should be between 6.5 and 9.5.

(2) The organic matter and suspended mechanical impurities should be less than 25 mg/L; the oil content is less than 5 mg/L.

(3) Temporary hardness 10 DEG or less (1 DEG corresponds to 10mg CaO or 7.19mg MgO in 1 liter of water).

In winter, in order to prevent the cooler from being frozen, accumulated water in the cooler should be drained after the machine is stopped. The unit is not used for a long time, and accumulated water should be discharged.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (6)

1. The utility model provides a dry ash air compressor machine with from cooling function which characterized in that includes:

a compressor main unit (04);

the air suction assembly comprises an air filter, an air inlet valve (13) and a connecting pipe, wherein an air inlet of the air filter is communicated with the atmosphere, and an air outlet of the air filter is communicated with a working cavity of the compressor main machine (04) through the air inlet valve (13);

the exhaust assembly comprises an oil-gas separator (09), a minimum pressure valve (14), a safety valve (15), a blow-down valve, a gas-water separator and a connecting pipeline, wherein an exhaust port of the working cavity is communicated with the oil-gas separator (09), a gas outlet of the oil-gas separator (09) is communicated with the atmosphere through the connecting pipeline, and the minimum pressure valve (14), the safety valve (15) and the blow-down valve are arranged on one side of the connecting pipeline;

the oil way assembly comprises a thermal valve and an oil filter, and the oil-gas separator (09) is communicated with the working cavity through the thermal valve and the oil filter;

the cooling assembly comprises an oil cooler (10) and an after cooler, a cooling inlet of the oil cooler (10) is communicated with a liquid outlet of the oil-gas separator (09), and a cooling outlet of the oil cooler is communicated with the working cavity; the cooling inlet of the aftercooler is in communication with the outlet of the minimum pressure valve (14) and the cooling outlet of the aftercooler is in communication with the atmosphere.

2. The dry ash air compressor of claim 1, wherein the after cooler is a finned air heat exchanger.

3. The dry ash air compressor as claimed in claim 1, wherein the oil cooler (10) is a finned oil heat exchanger.

4. The dry ash air compressor of claim 1, further comprising a first cooling fan for cooling the oil cooler (10), wherein the first cooling fan is disposed beside the oil cooler (10).

5. The dry ash air compressor of claim 4, further comprising a second cooling fan for cooling the after cooler, wherein the second cooling fan is disposed beside the after cooler.

6. The dry ash air compressor as claimed in claim 5, further comprising an inverter motor (01), wherein the first cooling fan and the second cooling fan are both driven by the inverter motor (01).

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