CN211779136U - Oil-free screw compressor and air inlet valve thereof - Google Patents
Oil-free screw compressor and air inlet valve thereof Download PDFInfo
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- CN211779136U CN211779136U CN201922450848.5U CN201922450848U CN211779136U CN 211779136 U CN211779136 U CN 211779136U CN 201922450848 U CN201922450848 U CN 201922450848U CN 211779136 U CN211779136 U CN 211779136U
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Abstract
The utility model discloses an oil-free screw compressor air inlet valve, which comprises a valve cover, a valve body, a valve block, a valve rod, an elastic mechanism, a valve seat and a silencer; the valve body is connected with a valve seat, the valve seat is provided with an oil-free compressor exhaust cavity, and the silencer and the oil-free compressor exhaust cavity are provided with a connecting channel; the first end of the valve rod is connected with a valve plate capable of controlling the air suction flow of the compressor, the second end of the valve rod is provided with a sealing mechanism, and a connecting port of the valve rod is arranged close to an exhaust cavity of the oil-free compressor; the valve plate is arranged close to the valve cover and can be opened or closed under the driving of the valve rod; a hydraulic cavity is arranged in the valve body, and the sealing mechanism is arranged in the hydraulic cavity; hydraulic oil can be injected into the hydraulic cavity and the first side of the sealing mechanism; the second side of the sealing mechanism is provided with the elastic mechanism. The utility model provides an oil-free screw compressor admission valve can effectively reduce the volume of oil-free screw compressor admission valve, simplifies its structure, improves the stability when the valve moves.
Description
Technical Field
The utility model belongs to the technical field of the compressor, a helical-lobe compressor admission valve is related to, especially relate to an oil-free helical-lobe compressor and admission valve thereof.
Background
The air inlet valve of the screw compressor is used for reducing the load of the compressor at the starting and stopping stages by controlling the opening and closing of the valve of the air inlet valve in the loading and unloading processes of the compressor, so that the impact of the large instantaneous power of a motor on a power grid during starting is avoided. The working process of the normally closed air inlet valve is to control the opening degree of the valve plate in the valve by acting on the external force on the valve plate of the valve, thereby realizing the purpose of controlling the air inlet flow of the compressor. The valve plate of the valve can not generate surging, cavitation erosion and other phenomena when working at any opening. In the case of an oil-free screw compressor, an important factor in addition to the requirement for the intake valve to meet the above objective is that no additional medium (e.g., lubricating oil, etc.) can enter the interior of the compressor through the intake valve at any time.
To achieve this, an intake valve used in an oil-free screw compressor is generally of a structure in which the intake valve is moved in an upward direction and in a downward direction, and a valve plate for controlling the opening of the valve is reciprocated up and down along a vertical axis. However, the oil-free screw compression air inlet valves of the two driving modes in the market at present have obvious defects.
Firstly, because the air is difficult to seal, a sealing system of the air inlet valve adopting pneumatic driving is complex, and a sealing effect is achieved by adopting a multi-seal combination mode generally; secondly, because of the compressibility of the gas, the loading and unloading of the gas are completed instantly, so that the force acting on the valve plate changes instantly, and the valve plate is subjected to a larger impact by the instant load when the valve is opened or closed, and the valve plate is easy to deform. To avoid this, an additional mechanical device is required to counteract the impact due to the momentary change in air pressure. The above problems all cause the problems of complicated structure, increase of wearing parts, complicated control system, cost increase and the like of the air pressure driven normally closed air inlet valve.
And the hydraulic drive's that adopts on the market admission valve, because the valve block is vertical reciprocating motion along the vertical axis, in order to avoid the hydraulic oil in the pneumatic cylinder to enter into the compressor through the valve rod of connecting the valve block, its pneumatic cylinder often all separates with the interlocking gear of control valve aperture, and both connect through mechanical device such as lever before. This causes problems of large volume, heavy weight, complicated structure, increased cost, etc.
In view of the above, there is an urgent need to design a new air inlet valve for an oil-free screw compressor, so as to overcome the above-mentioned defects of the existing air inlet valve.
SUMMERY OF THE UTILITY MODEL
The utility model provides an oil-free screw compressor and admission valve thereof can effectively realize opening the flow control of breathing in of opening the stage to the compressor, combines the valve block of control admission valve and the pneumatic cylinder of control flap aperture and the uninstallation valve in compressor exhaust chamber through a root axis, and its structure is simplified to the very big volume that reduces oil-free screw compressor admission valve, improves the stability of valve operation.
For solving the technical problem, according to the utility model discloses an aspect adopts following technical scheme:
an oil-free screw compressor air admission valve, the air admission valve includes: the valve comprises a valve cover, a valve body, a valve plate, a valve rod, an elastic mechanism, a valve seat and a silencer;
the valve body is connected with a valve seat, the valve seat is provided with an oil-free compressor exhaust cavity, and the silencer and the oil-free compressor exhaust cavity are provided with a connecting channel;
the first end of the valve rod is connected with the valve plate capable of controlling the air suction flow of the compressor, the second end of the valve rod is provided with a sealing mechanism, and a connecting port of the valve rod is arranged close to an exhaust cavity of the oil-free compressor; the valve plate is arranged close to the valve cover and can be opened or closed under the driving of the valve rod;
a hydraulic cavity is arranged in the valve body, and the sealing mechanism is arranged in the hydraulic cavity; hydraulic oil can be injected into the hydraulic cavity and the first side of the sealing mechanism, so that the sealing mechanism moves towards the first direction, the valve plate is separated from the valve cover, and the connecting port of the valve rod blocks a connecting channel formed by the silencer and the oil-free compressor exhaust cavity;
the second side of sealing mechanism is equipped with elastic mechanism can be in the hydraulic oil discharge under the state in hydraulic pressure chamber, sealing mechanism moves towards the second direction, the valve block is closed gradually, with the valve gap laminating, the connector moves towards the second direction, oil free compressor exhaust chamber and muffler intercommunication.
As an embodiment of the utility model, the hydraulic pressure chamber is equipped with the oiling mouth, can pass through oiling mouth injection hydraulic oil.
As an embodiment of the present invention, the elastic mechanism is a spring.
As an embodiment of the present invention, when the valve plate is attached to the valve cover, the oil-free compressor exhaust cavity is communicated with the exhaust muffler; and the valve plate is in the maximum opening state, and the exhaust cavity of the oil-free compressor is disconnected with the silencer.
An oil-free screw compressor comprises the oil-free screw compressor air inlet valve.
The beneficial effects of the utility model reside in that: the utility model provides an oil-free screw compressor and admission valve thereof can effectively realize opening the flow control of breathing in of opening the stage to the compressor, combines the valve block of control admission valve and the pneumatic cylinder of control flap aperture and the uninstallation valve in compressor exhaust chamber through a root axis, and its structure is simplified to the very big volume that reduces oil-free screw compressor admission valve, improves the stability of valve operation.
Firstly, the air inlet valve is driven by hydraulic pressure, and the movement of the valve rod is a gradual process in the opening and closing processes of the valve due to the incompressibility of liquid, so that the air inlet valve is stable in operation and has no noise caused by transient violent impact; secondly, the one end of valve rod is connected with the valve block of control compressor flow of breathing in, and the other end sets up seal structure, and the connector is connected with oil free compressor exhaust chamber. The structure ingeniously combines the air inlet state and the exhaust cavity state when the compressor runs, the air inlet is opened, the exhaust cavity emptying channel is disconnected, when the compressor stops, the air inlet is closed, and the exhaust cavity emptying channel is opened. The volume of the air inlet valve is greatly reduced, the structure is simplified, extra control logic is reduced, and the cost is reduced; and finally, the valve rod reciprocates and the valve body forms a space, a hydraulic cylinder is arranged as a driving device for the operation of the valve, the hydraulic cylinder is not additionally arranged through mechanical linkage, the structure of the air inlet valve is simplified, and the stability is improved.
Drawings
Fig. 1 is a perspective view of an oil-free screw compressor air intake valve according to an embodiment of the present invention.
Fig. 2 is another perspective view of an oil-free screw compressor air intake valve according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an air inlet valve of an oil-free screw compressor according to an embodiment of the present invention.
Fig. 4 is a perspective view of an air inlet valve of an oil-free screw compressor according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For further understanding of the present invention, preferred embodiments of the present invention will be described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the present invention.
The description in this section is for exemplary embodiments only, and the present invention is not limited to the scope of the embodiments described. The same or similar prior art means and some technical features of the embodiments are mutually replaced and are also within the scope of the description and the protection of the invention.
The utility model discloses an oil-free screw compressor admission valve, please refer to fig. 1, the admission valve includes: the valve comprises a valve cover 1, a valve body 3, a valve plate 2, a valve rod 4, an elastic mechanism 5, a valve seat 6 and a silencer 7; valve body 3 connects disk seat 6, disk seat 6 is equipped with oil free compressor exhaust chamber 9, muffler 7 with oil free compressor exhaust chamber 9 is equipped with interface channel.
The first end of the valve rod 4 is connected with the valve plate 2 capable of controlling the air suction flow of the compressor, the second end of the valve rod 4 is provided with a sealing mechanism 41, and a connecting port 42 of the valve rod 4 is arranged close to the exhaust cavity 9 of the oil-free compressor; the valve plate 2 is arranged close to the valve cover 1 and can be opened or closed under the driving of the valve rod 4.
A hydraulic cavity 8 is arranged inside the valve body 3, and the sealing mechanism 41 is arranged in the hydraulic cavity 8; hydraulic oil can be injected into the hydraulic cavity 8 and the first side of the sealing mechanism 41, so that the sealing mechanism 41 moves towards the first direction (rightward in fig. 1), the valve plate 2 is separated from the valve cover 1, and the connecting port 42 of the valve rod 4 blocks a connecting channel formed by the muffler 7 and the oil-free compressor exhaust cavity 9. The utility model discloses an in the embodiment, hydraulic pressure chamber 8 is equipped with the oiling mouth, can pass through oiling mouth injection hydraulic oil.
The second side of sealing mechanism 41 is equipped with elastic mechanism 5 can be in the hydraulic oil discharge under the state in hydraulic pressure chamber 8, sealing mechanism 41 moves towards the second direction (move left as figure 2), valve block 2 closes gradually, laminates with valve gap 1, and connector 42 moves towards the second direction simultaneously, and oil free compressor exhaust chamber 9 communicates with muffler 7. In one embodiment, the resilient means 5 is a spring, and the hydraulic chamber 8 cooperates with the spring to control the operation of the moving parts of the inlet valve. Of course, the elastic mechanism 5 may have other structures, and even other reset mechanisms with reset function.
The working principle of the utility model is as follows: before the oil-free screw compressor is started, no hydraulic oil exists in the hydraulic cylinder, the valve rod 3 pushes a valve plate connected to the valve rod under the action of a spring force to be attached to and sealed with the valve cover, and at the moment, the air inlet valve is in a closed state (see figure 1). After the oil-free screw compressor is started, hydraulic oil is injected into the hydraulic cylinder, the valve rod is driven to move in the opposite direction by controlling the pressure of the hydraulic oil, the valve plate of the air inlet valve is separated from the valve cover, and the valve plate of the air inlet valve is opened and gradually reaches the maximum opening state (see figure 2). When oil-free screw compressor shut down, control hydraulic oil discharge hydraulic chamber, the valve rod moves under the effect of spring force, and the valve block is closed gradually, and oil-free screw compressor exhaust chamber communicates with exhaust muffler (see figure 1) this moment, and the high-pressure air in oil-free screw compressor exhaust chamber passes through exhaust muffler evacuation.
The utility model discloses still disclose an oil-free screw compressor, including foretell oil-free screw compressor admission valve.
To sum up, the utility model provides an oil-free screw compressor and admission valve thereof can effectively realize opening the flow control of breathing in of opening the stage to the compressor, combines the valve block of control admission valve and the pneumatic cylinder of control flap aperture and the uninstallation valve in compressor exhaust chamber through a root axis, and its structure is simplified to the volume of very big reduction oil-free screw compressor admission valve, improves the stability of valve operation.
Firstly, the air inlet valve is driven by hydraulic pressure, and the movement of the valve rod is a gradual process in the opening and closing processes of the valve due to the incompressibility of liquid, so that the air inlet valve is stable in operation and has no noise caused by transient violent impact; secondly, the one end of valve rod is connected with the valve block of control compressor flow of breathing in, and the other end sets up seal structure, and the connector is connected with oil free compressor exhaust chamber. The structure ingeniously combines the air inlet state and the exhaust cavity state when the compressor runs, the air inlet is opened, the exhaust cavity emptying channel is disconnected, when the compressor stops, the air inlet is closed, and the exhaust cavity emptying channel is opened. The volume of the air inlet valve is greatly reduced, the structure is simplified, extra control logic is reduced, and the cost is reduced; and finally, the valve rod reciprocates and the valve body forms a space, a hydraulic cylinder is arranged as a driving device for the operation of the valve, the hydraulic cylinder is not additionally arranged through mechanical linkage, the structure of the air inlet valve is simplified, and the stability is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the present invention are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the present invention.
Claims (5)
1. An oil-free screw compressor air admission valve, characterized in that, the air admission valve includes: the valve comprises a valve cover, a valve body, a valve plate, a valve rod, an elastic mechanism, a valve seat and a silencer;
the valve body is connected with a valve seat, the valve seat is provided with an oil-free compressor exhaust cavity, and the silencer and the oil-free compressor exhaust cavity are provided with a connecting channel;
the first end of the valve rod is connected with the valve plate capable of controlling the air suction flow of the compressor, the second end of the valve rod is provided with a sealing mechanism, and a connecting port of the valve rod is arranged close to an exhaust cavity of the oil-free compressor; the valve plate is arranged close to the valve cover and can be opened or closed under the driving of the valve rod;
a hydraulic cavity is arranged in the valve body, and the sealing mechanism is arranged in the hydraulic cavity; hydraulic oil can be injected into the hydraulic cavity and the first side of the sealing mechanism, so that the sealing mechanism moves towards the first direction, the valve plate is separated from the valve cover, and the connecting port of the valve rod blocks a connecting channel formed by the silencer and the oil-free compressor exhaust cavity;
the second side of sealing mechanism is equipped with elastic mechanism can be in the hydraulic oil discharge under the state in hydraulic pressure chamber, sealing mechanism moves towards the second direction, the valve block is closed gradually, with the valve gap laminating, the connector moves towards the second direction, oil free compressor exhaust chamber and muffler intercommunication.
2. An oil-free screw compressor air admission valve as claimed in claim 1, wherein:
the hydraulic pressure chamber is equipped with the oiling mouth, can pass through oiling mouth injection hydraulic oil.
3. An oil-free screw compressor air admission valve as claimed in claim 1, wherein:
the elastic mechanism is a spring.
4. An oil-free screw compressor air admission valve as claimed in claim 1, wherein:
the oil-free compressor exhaust cavity is communicated with the exhaust silencer under the state that the valve plate is attached to the valve cover; and the valve plate is in the maximum opening state, and the exhaust cavity of the oil-free compressor is disconnected with the silencer.
5. An oil-free screw compressor comprising an oil-free screw compressor air intake valve according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450848.5U CN211779136U (en) | 2019-12-27 | 2019-12-27 | Oil-free screw compressor and air inlet valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922450848.5U CN211779136U (en) | 2019-12-27 | 2019-12-27 | Oil-free screw compressor and air inlet valve thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211779136U true CN211779136U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922450848.5U Active CN211779136U (en) | 2019-12-27 | 2019-12-27 | Oil-free screw compressor and air inlet valve thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211779136U (en) |
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2019
- 2019-12-27 CN CN201922450848.5U patent/CN211779136U/en active Active
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