CN111749901A - Check valve and rotor compressor - Google Patents
Check valve and rotor compressor Download PDFInfo
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- CN111749901A CN111749901A CN201910246201.2A CN201910246201A CN111749901A CN 111749901 A CN111749901 A CN 111749901A CN 201910246201 A CN201910246201 A CN 201910246201A CN 111749901 A CN111749901 A CN 111749901A
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- impeller
- check valve
- pressure
- valve seat
- suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a check valve and a rotor type compressor, and belongs to the technical field of compressors. The check valve comprises a valve seat, an impeller and a ratchet wheel; an inner cavity for accommodating the impeller is arranged in the valve seat, the impeller is provided with a plurality of blades, and a partition cavity is formed between the blades; the impeller realizes unidirectional rotation towards a preset direction through the ratchet wheel; the valve seat is provided with a suction inlet and a discharge outlet which are communicated with the inner cavity, and when pressure difference exists between two sides of the impeller in the valve seat and the pressure in the suction inlet is greater than the pressure in the discharge outlet, gas or/and liquid entering the partitioned cavity between the blades is transmitted to the discharge outlet from the suction inlet through the rotation of the impeller; when the pressure in the suction port is smaller than the pressure in the discharge port, the ratchet wheel restricts the impeller from rotating in the reverse direction. The check valve provided by the invention does not comprise a spring, so that the reliability of the check valve is improved; the impact sound between the valve core and the valve seat does not exist in the check valve, and the noise generated when the check valve works is reduced.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a check valve and a rotor type compressor.
Background
The rotor compressor is widely used in electrical equipment such as air conditioners, refrigerators and the like, and the volumetric efficiency of the compressor is one of the main parameters for evaluating the performance of the compressor.
At present, in order to improve the volumetric efficiency of a rotor compressor during low-temperature heating, a check valve is generally installed in the compressor with an air-supply enthalpy-increasing structure, and the check valve can reduce the backflow of a refrigerant, so that the volumetric efficiency of the compressor is improved. A check valve in the prior art is generally shown in fig. 1 and 2, and comprises a base 1, a valve core 2, a return spring 3 and a component 4 for stroke limitation and connection, wherein the check valve can effectively reduce backflow of refrigerant from an air outlet 6 to an air inlet 5; the refrigerant usually contains gas and liquid, and the refrigerant flows to the gas outlet 6 through the through-flow channel, and in order to increase the area of the through-flow channel, a plurality of through-flow grooves 7 need to be processed on the inner side of the base or the outer diameter of the valve core, so that the refrigerant smoothly flows to the direction of the gas outlet 6. In addition, in order to improve the reliability of the compressor pump body and avoid overheating of parts due to overhigh exhaust temperature under the condition of high-temperature environment refrigeration or high-pressure ratio working condition refrigeration or heating, the injection structure is generally added, so that the refrigeration machine oil degradation and the abnormal abrasion of the parts are caused. The use of a check valve in the injection configuration also improves the volumetric efficiency of the compressor.
However, the check valve in the prior art has at least the following problems: the check valve in the prior art relies on a large degree of a spring, but the spring is easily damaged due to frequent compression and expansion, resulting in low reliability of the check valve.
Disclosure of Invention
The invention provides a check valve and a rotor type compressor to improve the reliability of the check valve.
In order to achieve the above object, the present invention provides a check valve including a valve seat, an impeller, and a ratchet;
an inner cavity for accommodating the impeller is arranged in the valve seat, the impeller is provided with a plurality of blades, and a partition cavity is formed between the blades;
the impeller realizes unidirectional rotation towards a preset direction through the ratchet wheel;
the valve seat is provided with a suction inlet and a discharge outlet which are communicated with the inner cavity, and when pressure difference exists between two sides of an impeller in the valve seat and the pressure in the suction inlet is greater than the pressure in the discharge outlet, gas or/and liquid entering a cavity divided between the blades is transmitted to the discharge outlet from the suction inlet through the rotation of the impeller; when the pressure in the suction port is lower than the pressure in the discharge port, the ratchet wheel restricts the impeller from rotating in the reverse direction.
Optionally, the shape of the inner cavity of the valve seat for accommodating the impeller is matched with the shape of the impeller, and the impeller is arranged in the inner cavity and forms a throttling sealing structure with the inner wall of the inner cavity through clearance fit.
Optionally, the impeller further comprises a wheel shaft and 2 circular baffles, the blades are uniformly distributed around the wheel shaft, and the 2 circular baffles are symmetrically connected to two sides of each blade in a direction perpendicular to the axial direction of the wheel shaft.
Optionally, the number of the blades included in the impeller is not less than 4.
Optionally, the suction channel corresponding to the suction inlet and the discharge channel corresponding to the discharge outlet are located on the same straight line.
Optionally, the valve seat is composed of a plurality of split bodies, and the connection positions of the split bodies are connected in a welding mode.
The invention also provides a rotor type compressor, which comprises an air cylinder, wherein the rotor type compressor comprises any one of the check valves; the discharge port of the check valve is communicated with the suction port of the cylinder, and the suction port of the check valve is communicated with the economizer or the flash tank.
Optionally, the suction channel and/or the discharge channel are connected to an external pipeline by means of a thread, a weld or a threaded ferrule.
Optionally, the rotor compressor further comprises a lens, the installation position of the lens corresponds to the installation position of the impeller, and the lens is used for observing the operation condition of the impeller.
Optionally, the rotor compressor further includes a rotation speed measuring device for measuring a rotation speed of the check valve, or a flow measuring device for measuring a refrigerant passing through the check valve.
When the pressure of the suction inlet is higher than that of the discharge outlet, the refrigerant drives the impeller to rotate in a single direction towards the preset direction, so that the refrigerant is transmitted from the suction inlet to the discharge outlet; when the pressure of the suction inlet is less than or equal to the pressure of the discharge outlet, the impeller does not rotate under the action of the ratchet wheel to prevent the refrigerant from flowing back; the impeller and the valve seat form a throttling sealing structure, so that the refrigerant can be further prevented from flowing back from the discharge port to the suction port. The check valve provided by the invention does not comprise a spring, so that the reliability of the check valve is improved; in addition, the check valve provided by the invention has no impact sound between the valve core and the valve seat, and reduces the noise generated when the check valve works.
Drawings
FIG. 1 is a schematic view of a check valve of the prior art;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a check valve according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a throttling sealing structure provided by an embodiment of the invention;
fig. 5 is a schematic structural diagram of an impeller provided in an embodiment of the present invention.
[ reference numerals are described below ]:
1-a base;
2-a valve core;
3-a spring;
4-means for stroke limiting and coupling;
5-an air inlet;
6-air outlet;
7-a through flow groove;
21-valve seat;
22-an impeller;
23-a ratchet wheel;
24-suction inlet;
25-a discharge port;
26-a suction channel;
27-a discharge channel;
28-dowel holes;
29-center line.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, a check valve and a rotary compressor according to the present invention will be described in further detail with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 3, a schematic structural diagram of a check valve provided in an embodiment of the present invention includes a valve seat 21, an impeller 22, and a ratchet 23;
the valve seat 21 is provided with an inner cavity with a shape matched with that of the impeller 22, the impeller 22 is arranged in the inner cavity and forms a throttling sealing structure with the inner wall of the inner cavity through clearance fit, the middle part of the impeller 22 is provided with an axle, a ratchet wheel 23 is arranged at the axle, and the impeller 22 can realize unidirectional rotation towards a preset direction in the inner cavity through the ratchet wheel 23; the ratchet wheel 23 may be a friction type ratchet wheel, an external tooth type ratchet wheel or an internal tooth type ratchet wheel.
The valve seat 21 is provided with a suction port 24 and a discharge port 25 which are communicated with the inner cavity, and when the pressure of the suction port 24 is greater than that of the discharge port 25, the refrigerant drives the impeller 22 to rotate in a single direction in a preset direction, so that the refrigerant flows from the suction port 24 to the discharge port 25; when the pressure of the suction port 24 is less than or equal to the pressure of the discharge port 25, the ratchet wheel 23 stops the rotation of the impeller 22.
Alternatively, the impeller 22 may have a structure as shown in fig. 5, where the impeller 22 has 2 circular baffles and a plurality of blades, each blade is located between the 2 circular baffles, and adjacent blades and the circular baffles form a chamber for conveying the refrigerant. Wherein, the blades and the circular baffle can be assembled together or integrally formed; the shape of 2 circular baffles is matched with the shape of the inner cavity of the valve seat 21, the adjacent blades and the circular baffles form a cavity, the cavity is used for transmitting a refrigerant, the distance between one end of each blade, which is far away from the axle center of the impeller 22, and the inner wall of the inner cavity of the valve seat 21 is very small, so that the cavity and the inner wall of the inner cavity of the valve seat 21 form a throttling sealing structure, when a refrigerant enters the suction port 24, the pressure of the refrigerant at the suction port 24 is greater than that of the refrigerant at the discharge port 25, the thrust of the refrigerant to the impeller 22 and the control direction of the ratchet wheel 23 are clockwise, and further the impeller 22 is driven to rotate, so that; when the pressure of the refrigerant at the suction port 24 is smaller than that of the refrigerant at the discharge port 25, the thrust of the refrigerant to the impeller 22 is opposite to the control direction of the ratchet wheel 23, and the impeller 22 stops rotating; when the pressure of the refrigerant at the suction port 24 is equal to the pressure of the refrigerant at the discharge port 25, the impeller 22 is balanced in force at both sides, and the impeller 22 does not rotate.
In other embodiments, when the circular baffles are not disposed on both sides of the vane, the adjacent vanes and the inner wall of the inner cavity of the valve seat 21 form chambers, the distance between the periphery of each vane and the inner wall of the inner cavity of the valve seat 21 is small, and the chambers and the inner wall of the inner cavity of the valve seat 21 can also form a throttling sealing structure. However, the sealing effect between the impeller and the valve seat in such a structure is inferior to that between the closed impeller and the valve seat shown in fig. 5, because the small gaps exist between the inner walls of the inner cavity of the valve seat and the circumferential direction and both sides of the impeller in such a structure, the leakage amount of the refrigerant is large.
When the distance between the vane and the inner wall of the inner cavity of the valve seat 21 is set, the specific setting may be performed according to the material of the vane, the material of the valve seat, and the expansion characteristic of the refrigerant, and generally, the minimum value n of the distance between the vane and the inner wall of the valve seat may be set to 0 < n < 3 mm, so that the impeller 22 and the valve seat 21 form a throttle seal structure, which may also be referred to as a labyrinth seal structure. The principle of the throttling sealing structure is shown in fig. 4, the throttling sealing structure is divided into 5 regions, namely P0, P1, P2, P3 and P4, the pressure of the 5 regions when refrigerant passes through the 5 regions is sequentially represented by P0, P1, P2, P3 and P4, the original pressure difference between a high-pressure region P0 and a low-pressure region P4 is assumed to be n, when refrigerant leaks from the high-pressure region P0 to a low-pressure region P4, the leakage amount is positively correlated with a gap a and the original pressure difference n, when a part of refrigerant flows from P0 to a P1 space through the gap a, the refrigerant expands in a P1 region, the refrigerant pressure drops, so that P1 < P0, and by analogy, P4 < P3 < P2 can be obtained, therefore, the throttling leakage amount of the sealing structure is far smaller than the leakage amount when refrigerant directly leaks from the P2 region to the P2, and the sealing effect is achieved.
When the pressure of the suction port 24 is higher than that of the discharge port 25, the refrigerant drives the impeller 22 to rotate in a single direction towards a preset direction, so that the refrigerant is transmitted from the suction port 24 to the discharge port 25; when the pressure of the suction port 24 is less than or equal to the pressure of the discharge port 25, the impeller 22 does not rotate due to the action of the ratchet wheel 23, so as to prevent the refrigerant from flowing back; the impeller 22 forms a throttle seal structure with the valve seat 21, so that the refrigerant is further prevented from flowing back from the discharge port 25 to the suction port 24. The check valve provided by the invention does not comprise a spring, so that the reliability of the check valve is improved; in addition, the check valve provided by the invention has no impact sound between the valve core and the valve seat, and reduces the noise generated when the check valve works.
Referring to fig. 3, the check valve provided by the present invention realizes the transmission of the sprayed refrigerant gas or liquid through the rotation of the impeller, and the wheel shaft in the middle of the impeller is provided with a ratchet structure, thereby realizing the unidirectional rotation of the impeller. When the injection is needed, the pressure difference exists on the two sides of the impeller in the check valve, the pressure of the suction side is larger than the pressure of the discharge side, namely the pressure of the suction port 24 is larger than the pressure of the discharge port 25, and the refrigerant gas or liquid entering the dividing cavity between the blades of the impeller is transmitted from the suction side to the discharge side through the rotation of the impeller, so that the through flow of the refrigerant is realized. The flow rate of the refrigerant can be automatically adjusted through the rotating speed of the impeller according to the pressure difference. When the pressure difference is balanced, the impeller stops rotating; due to the ratchet, the impeller cannot rotate in the reverse direction when the suction-side pressure is less than the discharge-side pressure. Meanwhile, a throttling sealing structure is formed between the impeller partition cavity and the contour clearance of the valve seat, so that refrigerant gas or liquid can be effectively prevented from flowing back from the discharge side to the suction side, and the function of a one-way check valve is achieved.
Alternatively, the suction passage 26 corresponding to the suction port 24 and the discharge passage 27 corresponding to the discharge port 25 are located on the same straight line. As shown in fig. 3, the suction channel 26 and the discharge channel 27 are disposed on the same straight line and on the same side of the center line 29, so as to ensure that the refrigerant drives the impeller 22 to rotate in a single direction in the preset direction when the pressure of the suction port 24 is greater than the pressure of the discharge port 25, and in the counterclockwise direction in the preset direction shown in fig. 3, the refrigerant is transmitted from the suction port 24 to the discharge port 25; when the pressure of the suction port 24 is less than or equal to the pressure of the discharge port 25, the impeller 22 does not rotate due to the ratchet 23, thereby preventing the refrigerant from flowing back. In addition, the suction passage 26 and the discharge passage 27 are arranged in the same line, which also facilitates the manufacturing process.
In other embodiments, the suction channel 26 and the discharge channel 27 may not be aligned, and the suction channel 26 and the discharge channel 27 may not be parallel to the center line 29, as long as the resultant force of the refrigerant entering from the suction port 24 to the impeller is the same as the predetermined direction, and the resultant force of the refrigerant returning from the discharge port 25 to the impeller is opposite to the predetermined direction, which is not limited in the present invention.
Optionally, the number m of the blades included in the impeller 22 satisfies that m is greater than or equal to 4, and m is a positive integer. According to the labyrinth sealing principle, the sealing effect is related to the number of the chambers, and when the number of the chambers reaches a certain number, the sealing effect can be close to complete sealing. Based on the actual test results, when the number of chambers is 4, that is, the number of blades is 4, the sealing effect can reach about 92%, so in the present embodiment, the number m of chambers included in the impeller 22 is set to satisfy m ≧ 4.
Alternatively, the individual blades of the impeller 22 are distributed evenly over the impeller 22. The blades are uniformly arranged on the impeller 22, so that the sizes of the divided cavities among the blades are equal, and when the impeller 22 rotates, the impeller 22 can rotate at a balanced rotating speed for the refrigerant with unchanged pressure because the volumes of the refrigerants in the divided cavities are the same. In this embodiment and other embodiments, for the refrigerant with varying pressure, the impeller 22 can automatically adjust its rotation speed to complete the refrigerant transmission depending on the pressure of the refrigerant.
Optionally, the valve seat 21 is composed of a plurality of separate bodies, and each separate body is provided with a positioning pin hole 28. Referring to fig. 3, the valve seat 21 is composed of upper and lower 2 semicylinders, which are respectively located at upper and lower portions of a center line 29, and at least 1 aligning pin hole 28 is respectively provided at each semicylinder to accurately align the check valve when the check valve is installed.
Alternatively, the connection positions of the valve seat 21 and the respective sub-bodies are connected by welding. When assembling the check valve, in order to enhance the sealing effect of the check valve, the connection positions between the respective components of the valve seat 21 may be welded by welding.
Based on the same technical concept, the invention also provides a rotor type compressor, which comprises an air cylinder and a cylinder cover, wherein the rotor type compressor comprises any one of the check valves; the check valve is arranged outside the cylinder or the cylinder cover, the discharge port of the check valve is connected with the air suction port of the cylinder, and the suction port of the check valve is connected with a device for supplying refrigerant, such as an economizer or a flash tank. The installation mode of the check valve in the compressor is the same as that of the check valve in the prior art.
When the number n of the cylinders contained in the compressor is more than or equal to 2, and the middle plate is arranged between the adjacent cylinders, the check valve provided by the invention can also be arranged outside the middle plate to communicate the adjacent cylinders.
When the pressure of a suction port 24 of the check valve is higher than the pressure of a discharge port 25, a refrigerant drives an impeller 22 to rotate in a single direction in a preset direction, so that the refrigerant is transmitted from the suction port 24 to the discharge port 25; when the pressure of the suction port 24 is less than or equal to the pressure of the discharge port 25, the impeller 22 does not rotate due to the action of the ratchet wheel 23, so as to prevent the refrigerant from flowing back; the impeller 22 forms a throttle seal structure with the valve seat 21, so that the refrigerant is further prevented from flowing back from the discharge port 25 to the suction port 24. The check valve provided by the invention does not comprise a spring, so that the reliability of the check valve is improved; in addition, the check valve provided by the invention has no impact sound between the valve core and the valve seat, and reduces the noise generated when the check valve works.
Alternatively, the suction channel 26 and/or the discharge channel 27 may be connected to the external line by means of a thread, welding or a threaded ferrule. For example, to facilitate connection of the suction channel 26 to an economizer or flash tank, internal threads may be provided on the suction channel 26 to connect the respective lines; to facilitate connection of the discharge channel 27 to the cylinder suction of the compressor, an internal thread may be provided on the discharge channel 27 for connection of the corresponding pipe. In other embodiments, the suction passage 26 and the discharge passage 27 may not have internal threads, and may be connected to external piping by welding or by cutting.
Optionally, the rotor compressor further comprises a lens, the installation position of the lens corresponds to the installation position of the check valve, and the lens is used for observing the operation condition of the check valve. In specific implementation, the corresponding relationship between the rotation speed and the flow rate may be calibrated, and the current refrigerant flow rate value is obtained through the rotation speed of the impeller 22 and the calibrated content.
Optionally, the rotary compressor further includes a rotation speed measuring device for measuring a rotation speed of the check valve, or a flow rate measuring device for measuring a refrigerant passing through the check valve. The compressor provided by this embodiment may further include a rotation speed measuring device or a flow measuring device, the rotation speed measuring device may measure the rotation speed of the impeller 22 of the check valve, and the flow measuring device may measure the flow of the refrigerant passing through the check valve, so that a user may obtain related data conveniently.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.
Claims (10)
1. A check valve is characterized by comprising a valve seat, an impeller and a ratchet wheel;
an inner cavity for accommodating the impeller is arranged in the valve seat, the impeller is provided with a plurality of blades, and a partition cavity is formed between the blades;
the impeller realizes unidirectional rotation towards a preset direction through the ratchet wheel;
the valve seat is provided with a suction inlet and a discharge outlet which are communicated with the inner cavity, and when pressure difference exists between two sides of an impeller in the valve seat and the pressure in the suction inlet is greater than the pressure in the discharge outlet, gas or/and liquid entering a cavity divided between the blades is transmitted to the discharge outlet from the suction inlet through the rotation of the impeller; when the pressure in the suction port is lower than the pressure in the discharge port, the ratchet wheel restricts the impeller from rotating in the reverse direction.
2. The check valve of claim 1, wherein the valve seat has an interior cavity shaped to receive the impeller and the impeller is disposed in the interior cavity and forms a throttling seal with an interior wall of the interior cavity by a clearance fit.
3. The check valve of claim 1 or 2, wherein the impeller further has a hub and 2 circular baffles, the plurality of vanes are uniformly distributed around the hub, and the 2 circular baffles are symmetrically connected to both sides of the vanes perpendicularly to an axial direction of the hub.
4. The check valve of claim 1, wherein said impeller includes a number of vanes not less than 4.
5. The check valve of claim 1, wherein the suction passage corresponding to the suction port and the discharge passage corresponding to the discharge port are located on the same line.
6. The check valve of claim 1, wherein the valve seat is formed of a plurality of divided bodies, and the coupling positions between the divided bodies are coupled by welding.
7. A rotary compressor comprising a cylinder, characterized in that it comprises a non-return valve according to any one of claims 1 to 6;
the discharge port of the check valve is communicated with the suction port of the cylinder, and the suction port of the check valve is communicated with the economizer or the flash tank.
8. A rotor compressor according to claim 7, characterized in that the suction channel and/or the discharge channel are connected to the external pipe by means of a thread, a weld or a threaded bayonet joint.
9. A rotor compressor according to claim 7, further comprising a lens installed at a position corresponding to the installation position of the impeller, for observing the operation condition of the impeller.
10. A rotary compressor according to claim 7, further comprising a rotation speed measuring means for measuring a rotation speed of the check valve or a flow rate measuring means for measuring a refrigerant passing through the check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910246201.2A CN111749901A (en) | 2019-03-29 | 2019-03-29 | Check valve and rotor compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910246201.2A CN111749901A (en) | 2019-03-29 | 2019-03-29 | Check valve and rotor compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111749901A true CN111749901A (en) | 2020-10-09 |
Family
ID=72672451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910246201.2A Pending CN111749901A (en) | 2019-03-29 | 2019-03-29 | Check valve and rotor compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111749901A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2878735Y (en) * | 2005-12-29 | 2007-03-14 | 西安庆安制冷设备股份有限公司 | Rotor type compressor |
| CN201575202U (en) * | 2009-10-31 | 2010-09-08 | 桐乡市大华人造板有限公司 | Rotary ash discharge unidirectional rotary valve |
| CN102583059A (en) * | 2012-03-05 | 2012-07-18 | 厦门弘维能源环境技术有限公司 | Suspended type gas locking discharge valve |
| JP2012163177A (en) * | 2011-02-08 | 2012-08-30 | Suzuki Motor Corp | Check valve, and hydraulic pressure supply device |
| CN103423163A (en) * | 2012-05-24 | 2013-12-04 | 广东美芝制冷设备有限公司 | Rotary compressor, and jet refrigeration circulating apparatus comprising it |
| CN106352097A (en) * | 2016-11-05 | 2017-01-25 | 张海娟 | Combined labyrinth sealing device |
| CN107091066A (en) * | 2017-06-24 | 2017-08-25 | 西南石油大学 | A kind of Novel check valve that can be used for measuring |
| CN206590611U (en) * | 2016-12-14 | 2017-10-27 | 张海娟 | A kind of controllable valve of flow |
| CN207033757U (en) * | 2017-08-09 | 2018-02-23 | 珠海凌达压缩机有限公司 | Pump body structure and there is its compressor |
| CN207552357U (en) * | 2017-10-30 | 2018-06-29 | 宝山钢铁股份有限公司 | The ash discharge flow apparatus of gravity blast furnace dust catcher |
-
2019
- 2019-03-29 CN CN201910246201.2A patent/CN111749901A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2878735Y (en) * | 2005-12-29 | 2007-03-14 | 西安庆安制冷设备股份有限公司 | Rotor type compressor |
| CN201575202U (en) * | 2009-10-31 | 2010-09-08 | 桐乡市大华人造板有限公司 | Rotary ash discharge unidirectional rotary valve |
| JP2012163177A (en) * | 2011-02-08 | 2012-08-30 | Suzuki Motor Corp | Check valve, and hydraulic pressure supply device |
| CN102583059A (en) * | 2012-03-05 | 2012-07-18 | 厦门弘维能源环境技术有限公司 | Suspended type gas locking discharge valve |
| CN103423163A (en) * | 2012-05-24 | 2013-12-04 | 广东美芝制冷设备有限公司 | Rotary compressor, and jet refrigeration circulating apparatus comprising it |
| CN106352097A (en) * | 2016-11-05 | 2017-01-25 | 张海娟 | Combined labyrinth sealing device |
| CN206590611U (en) * | 2016-12-14 | 2017-10-27 | 张海娟 | A kind of controllable valve of flow |
| CN107091066A (en) * | 2017-06-24 | 2017-08-25 | 西南石油大学 | A kind of Novel check valve that can be used for measuring |
| CN207033757U (en) * | 2017-08-09 | 2018-02-23 | 珠海凌达压缩机有限公司 | Pump body structure and there is its compressor |
| CN207552357U (en) * | 2017-10-30 | 2018-06-29 | 宝山钢铁股份有限公司 | The ash discharge flow apparatus of gravity blast furnace dust catcher |
Non-Patent Citations (2)
| Title |
|---|
| 刘士学，方先清: "《透平压缩机强度与振动》", 31 October 1997, 机械工业出版社 * |
| 闫国军: "《叶片式泵风机原理及设计》", 30 November 2009, 哈尔滨工业大学出版社 * |
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Application publication date: 20201009 |