CN213419900U

CN213419900U - Electronic expansion valve rotor capable of reducing noise of air flow impacting valve needle

Info

Publication number: CN213419900U
Application number: CN202022507672.5U
Authority: CN
Inventors: 何泽淼
Original assignee: Zhejiang Hengsen Industry Group Co ltd
Current assignee: Zhejiang Hengsen Industry Group Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-11
Anticipated expiration: 2030-11-03

Abstract

An electronic expansion valve rotor capable of reducing noise of air flow impacting a valve needle comprises a shell, a positioning shaft, a supporting seat, a stop rod, a magnetic ring, a valve needle spring, a connecting sleeve, a guide nut, a welding ring, a clamp spring, the valve needle, a transverse connecting pipe, a direct pipe, a valve nozzle, a valve seat, a positioning support, a screw rod, a spring seat, a sliding ring and a guide rail shaft. The rotor structure of the electronic expansion valve is optimized on the basis of the existing rotor structure of the electronic expansion valve, the length of the part of the valve needle extending out of the guide nut is shortened by lengthening the guide nut and the thread of the lengthened thread section and additionally arranging the valve needle guide section at the front end of the guide nut, so that the rigidity of the valve needle in a single-pivot state can be improved, and the noise caused by the vibration of the valve needle under the impact of transverse force is avoided.

Description

Electronic expansion valve rotor capable of reducing noise of air flow impacting valve needle

Technical Field

The utility model relates to an electronic expansion valve rotor with reduce air current and strike needle noise.

Background

The main body structure of the existing electronic expansion valve rotor is basically similar, but in some details, certain disadvantages still exist, such as the slender valve needle generates vibration when being subjected to transverse liquid flow impact, so that the noise of the expansion valve is increased, and how to reduce the noise of the electronic expansion valve is an important direction of research in the industry.

Disclosure of Invention

The utility model discloses an optimal design who goes on current electronic expansion valve rotor structure's basis, current lead screw and the guide nut that moulds plastics, because guide nut's whole length ratio is short, the screw thread part that corresponds the lead screw is also shorter, it is longer that the needle stretches out the lead screw part promptly, and the needle is the single pivot state when opening, long and thin needle receives the horizontal impact of liquid stream can arouse the shake, we add needle direction section through extension guide nut and extension screw thread section screw thread and at the guide nut front end, make the length that the needle stretches out the guide nut part shorten, thereby can improve the rigidity of needle when the single pivot state, avoid impacting the emergence shake and producing the noise because of the needle receives horizontal power.

The utility model discloses a realize like this, it comprises shell, location axle, supporting seat, check rod, magnetic ring, needle spring, adapter sleeve, guide nut, welded ring, jump ring, needle, cross-over pipe, direct pipe, valve cock, disk seat, locating support, lead screw, spring holder, sliding ring, guide rail axle. The positioning shaft is a stainless steel smooth round bar, is an injection molding insert of the supporting seat, and the embedding part is roughened to increase the combination firmness. The supporting seat is formed by plastic in an injection molding mode, the upper portion of the supporting seat is hollow, the positioning shaft is used as an insert to be integrated with the supporting seat in an injection molding mode during injection molding, the positioning shaft is arranged in the middle of the supporting seat, the stop rod is parallel to the positioning shaft and is offset to one side, the stop rod is directly formed by plastic injection molding together with the supporting seat, and the outer circumference of the supporting seat is matched with the bottom end of the inner side of the shell. The shell is a cylindrical thin-wall part, the arc surface at the bottom end is matched with the supporting seat, and the supporting seat is locked by a riveting pit pressed by the shell when being assembled in place; the inner diameter of the opening end of the shell is in clearance fit with the outer diameter of the valve seat. The guide nut is an injection molding part with a welding ring as an insert, the overall length of the guide nut is increased compared with the traditional structure, the overall appearance is in a cylindrical step shape, reinforcing ribs are arranged on the outer circumference of the guide nut, the guide nut is fixedly connected with a valve seat through the welding ring, a stepped hole is formed in the center of the guide nut, a large aperture is in clearance fit with a light circle of the middle section of the screw rod, the middle section of the guide nut is a threaded hole matched with the screw rod, and the minimum aperture in the front of the guide nut. The valve seat is made of metal materials, the shape of the valve seat is in a circular truncated cone step shape, a stepped hole is formed in the center of the valve seat, a large aperture is matched with the outer circle of a welding ring of the insert of the guide nut, a middle stepped hole is matched with the small aperture of the guide nut, the small aperture is a cavity where a refrigerant flows through, a transverse connecting pipe is arranged by opening a hole in the side face, a valve nozzle matching hole is formed in the bottom of the small aperture, and a step matched with the inner diameter of the shell is formed. The valve nozzle is made of metal materials, the shape of the valve nozzle is in a round platform step shape, the major diameter of the valve nozzle is fixedly connected with a bottom hole of a valve seat after being matched, the minor diameter of the valve nozzle is fixedly connected with a direct pipe, a taper hole matched with a valve needle in a taper shape is formed in the center of the valve nozzle, and a taper diffusion hole is formed in the outer end of the taper hole. The guide rail shaft is an injection molding threaded shaft with a center hole, the outer threads replace the function of a traditional spring guide rail, a counter bore for installing a valve needle spring and a blocking shoulder matched with the connecting sleeve are further arranged at the end part of the guide rail shaft, and a balance hole is formed in the middle of the guide rail shaft so as to avoid back pressure in the center hole and affecting the overall operation of the system. The lead screw be made by metal material, the appearance totality is the cylinder step form, outer circumference main aspects step and adapter sleeve correspond the hole assembly back welding, the middle section of lead screw establish with the anastomotic external screw thread of guide nut, the shoulder hole is established at the center of lead screw, the counter bore of installation guide rail axle is established to large aperture department, secondly is the shoulder hole that supplies installation needle spring, spring holder, needle and jump ring, the small aperture section then with needle clearance fit. The valve needle is made of stainless steel materials, one end of the valve needle is provided with a conical head matched with the conical hole of the valve nozzle, and the other end of the valve needle is provided with a groove for installing the snap spring. The spring seat is in a stepped cylinder shape, the diameter of the small end is in clearance fit with the inner diameter of the valve needle spring, the diameter of the large end is in clearance fit with the aperture of the screw rod, and a spherical bearing point is arranged at the center of the end face of the large end. The magnetic ring is made of neodymium iron boron materials, the shape is cylindrical, one end is open, and the other end and the connecting sleeve are molded into a whole through injection. The positioning support is an annular part, a plurality of positioning holes are formed in the half circumference of the ring and used for positioning the rotor and the stator, and the positioning support is made of stainless steel materials. The connecting sleeve is made of stainless steel material, the shape is similar to a step ring shape, and the circumference of the upper part and the lower part of the maximum outer diameter is milled with flat potential, so that the connecting sleeve is more reliably combined with the magnetic ring during injection molding; the center of the connecting sleeve is a stepped hole, the small aperture is fixedly connected with the guide rail shaft, and the large aperture is fixedly connected with the screw rod.

Assembling, namely fixedly connecting an assembly consisting of the welding ring and the guide nut with the valve seat through the welding ring, and pressing the guide rail shaft into the assembly consisting of the magnetic ring and the connecting sleeve for fixedly connecting; and after the clamp spring is arranged on the valve needle, the valve needle is inserted into the center hole of the screw rod, the spring seat and the valve needle spring are sequentially arranged in the screw rod, the large end of the screw rod is inserted into the connecting sleeve, and laser welding is adopted to ensure that the screw rod is reliably fixed with the connecting sleeve. The screw rod is screwed into the guide nut, the sliding ring is screwed into the guide rail shaft, an assembly consisting of the positioning shaft, the stop rod and the supporting seat is arranged in the shell and is fixed through the pressure riveting pit, then the positioning shaft is inserted into the central hole of the guide rail shaft, and meanwhile, the shell is clamped on the outer circumference of the valve seat and then is welded and fixed. And welding a positioning bracket on the shell, and welding a transverse connecting pipe and a direct pipe on the valve seat.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the guiding nut of the present invention.

Fig. 3 is a three-dimensional view of the guiding nut of the present invention.

Fig. 4 is the schematic structural diagram of the large flow state valve needle thickening of the present invention.

Fig. 5 is a schematic structural view of a rotor of a conventional expansion valve.

FIG. 1, a housing; 2. positioning the shaft; 3. a supporting seat; 3-1, a stop lever; 4. a magnetic ring; 5. a valve needle spring; 6. connecting sleeves; 7. a guide nut; 7-1, welding a ring; 8. a clamp spring; 9. a valve needle; 10. a transverse connection pipe; 11. a direct pipe; 12. a valve nozzle; 13. a valve seat; 14. positioning the bracket; 15. a screw rod; 16. a spring seat; 17. a slip ring; 18. a guide rail shaft; A. and (4) balancing holes.

Detailed Description

The utility model discloses constitute by shell (1), location axle (2), supporting seat (3), stop lever (3-1), magnetic ring (4), needle spring (5), adapter sleeve (6), guide nut (7), welding ring (7-1), jump ring (8), needle (9), horizontal connecting pipe (10), direct pipe (11), valve cock (12), disk seat (13), locating support (14), lead screw (15), spring holder (16), sliding ring (17), guide rail axle (18). The positioning shaft (2) is a stainless steel smooth round bar, is an injection molding insert of the supporting seat (3), and the embedded part of the positioning shaft is roughened to increase the combination firmness. The supporting seat (3) is formed by plastic in an injection molding mode, the upper portion of the supporting seat is hollow, the positioning shaft (2) is used as an insert to be integrated with the supporting seat in an injection molding mode, the positioning shaft (2) is arranged in the middle of the supporting seat (3), the stop rod (3-1) is parallel to the positioning shaft (2) and is offset to one side, the stop rod (3-1) is directly formed by plastic injection molding together with the supporting seat (3), and the outer circumference of the supporting seat (3) is matched with the bottom end of the inner side of the shell (1). The shell (1) is a cylindrical thin-wall part, the arc surface at the bottom end is matched with the supporting seat (3), and the supporting seat (3) is locked by pressing a riveting pit through the shell (1) when being assembled in place; the inner diameter of the opening end of the shell (1) is in clearance fit with the outer diameter of the valve seat (13). The guide nut (7) is an injection molding part with a welding ring (7-1) as an insert, the overall length of the guide nut is increased compared with the traditional structure, the overall appearance is in a cylindrical step shape, reinforcing ribs are arranged on the outer circumference of the guide nut, the guide nut is fixedly connected with a valve seat (13) through the welding ring (7-1), the center of the guide nut is a stepped hole, the large aperture of the guide nut is in clearance fit with the light circle of the middle section of a screw rod (15), the middle section of the guide nut is a threaded hole matched with the screw rod (15), and the minimum aperture of the front part of the guide nut is a guide. The valve seat (13) is made of metal materials, the shape of the valve seat is in a circular truncated cone step shape, a stepped hole is formed in the center of the valve seat, the large aperture of the valve seat is matched with the outer circle of an insert welding ring (7-1) of the guide nut (7), the middle stepped hole is matched with the small aperture of the guide nut (7), the small aperture is a cavity through which a refrigerant flows, a transverse connecting pipe (10) is arranged by opening a hole in the side face, a valve nozzle (12) matching hole is formed in the bottom of the small aperture, and a step matched with the inner diameter of the shell (1) is. The valve nozzle (12) is made of metal materials, the shape of the valve nozzle is in a circular truncated cone step shape, the large diameter of the valve nozzle is matched with a bottom hole of the valve seat (13) and then fixedly connected, the small diameter of the valve nozzle is fixedly connected with the direct pipe (11), the center of the valve nozzle is provided with a conical hole which is in conical matching with the valve needle (9), and the outer end of the conical hole is provided with a conical diffusion hole. The guide rail shaft (18) is an injection molding threaded shaft with a center hole, the function of a traditional spring guide rail is replaced by external threads, a counter bore for installing a valve needle spring (5) and a blocking shoulder matched with the connecting sleeve (6) are further arranged at the end part of the guide rail shaft (18), and a balance hole (A) is formed in the middle of the guide rail shaft (18) so as to avoid back pressure in the center hole and affecting the overall operation of the system. The screw rod (15) is made of metal materials, the appearance of the screw rod is generally in a cylindrical step shape, the step of the large end of the outer circumference is welded with the corresponding hole of the connecting sleeve (6) after being assembled, and the middle section of the screw rod (15) is provided with an external thread matched with the guide nut (7). The center of the screw rod (15) is provided with a stepped hole, the large-aperture part is provided with a counter bore for installing the guide rail shaft (18), and then the stepped hole is used for installing the valve needle spring (5), the spring seat (16), the valve needle (9) and the snap spring (8), and the small-aperture section is in clearance fit with the valve needle (9). The valve needle (9) is made of stainless steel materials, one end of the valve needle is provided with a conical head matched with the conical hole of the valve nozzle (12), and the other end of the valve needle is provided with a groove for installing the clamp spring (8). The spring seat (16) is in a stepped cylinder shape, the diameter of the small end is in clearance fit with the inner diameter of the valve needle spring (5), the diameter of the large end is in clearance fit with the aperture of the screw rod (15), and a spherical bearing point is arranged at the center of the end face of the large end. The magnetic ring (4) is made of neodymium iron boron materials, the shape is cylindrical, one end is open, and the other end and the connecting sleeve (6) are molded into a whole through injection. The positioning support (14) is an annular part, a plurality of positioning holes are formed in the half circumference of the ring for positioning the rotor and the stator, and the positioning support is made of stainless steel materials. The connecting sleeve (6) is made of stainless steel material, the shape is similar to a step ring shape, and the circumference of the upper part and the lower part of the maximum outer diameter is milled with flat potential, so that the connecting sleeve is more reliably combined with the magnetic ring (4) during injection molding; the center of the connecting sleeve (6) is a stepped hole, the small aperture is fixedly connected with the guide rail shaft (18), and the large aperture is fixedly connected with the screw rod (15).

Assembling, namely fixedly connecting an assembly consisting of the welding ring (7-1) and the guide nut (7) with the valve seat (13) through the welding ring (7-1), and fixedly connecting an assembly consisting of the guide rail shaft (18) pressed into the magnetic ring (4) and the connecting sleeve (6); the valve needle (9) is provided with the snap spring (8) and then inserted into the center hole of the screw rod (15), the spring seat (16) and the valve needle spring (5) are sequentially arranged in the screw rod (15), then the large end of the screw rod (15) is inserted into the connecting sleeve (6), and laser welding is adopted, so that the screw rod (15) and the connecting sleeve (6) are reliably fixed. The lead screw (15) is screwed into the guide nut (7), the sliding ring (17) is screwed into the guide rail shaft (18), then an assembly consisting of the positioning shaft (2), the stop rod (3-1) and the supporting seat (3) is arranged in the shell (1) and fixed through the riveting pit, then the positioning shaft (2) is inserted into the center hole of the guide rail shaft (18), and meanwhile, the shell (1) is clamped on the outer circumference of the valve seat (13) and then welded and fixed. And a positioning support (14) is welded on the shell (1), and a transverse connecting pipe (10) and a direct pipe (11) are welded on the valve seat (13).

Claims

1. An electronic expansion valve rotor capable of reducing noise of an air flow impacting a valve needle is characterized by comprising a shell, a positioning shaft, a supporting seat, a stop rod, a magnetic ring, a valve needle spring, a connecting sleeve, a guide nut, a welding ring, a clamp spring, the valve needle, a transverse connecting pipe, a direct pipe, a valve nozzle, a valve seat, a positioning support, a screw rod, a spring seat, a sliding ring and a guide rail shaft; the positioning shaft is a stainless steel smooth round bar, is an injection molding insert of the supporting seat, and the embedded part of the positioning shaft is roughened to increase the combination firmness; when the supporting seat is injection-molded, the positioning shaft is used as an insert and is injection-molded with the supporting seat into a whole, the positioning shaft is arranged in the middle of the supporting seat, the stop rod is parallel to the positioning shaft and is offset to one side, the stop rod is directly injection-molded with plastic together with the supporting seat, and the outer circumference of the supporting seat is matched with the bottom end of the inner side of the shell; the shell is a cylindrical thin-wall part, the arc surface at the bottom end is matched with the supporting seat, and the supporting seat is locked by a riveting pit pressed by the shell when being assembled in place; the inner diameter of the opening end of the shell is in clearance fit with the outer diameter of the valve seat; the valve seat is made of metal materials, the shape of the valve seat is in a round platform step shape, a stepped hole is formed in the center, the large aperture is matched with the outer circle of the guide nut insert welding ring, the middle stepped hole is matched with the small aperture of the guide nut, a transverse connecting pipe is arranged on the side face of the stepped hole, a valve nozzle matching hole is formed in the bottom of the small aperture, and a step matched with the inner diameter of the shell is formed in the outer diameter of the large end; the valve nozzle is made of metal materials, the shape of the valve nozzle is in a round platform step shape, the major diameter of the valve nozzle is fixedly connected with a bottom hole of a valve seat after being matched, the minor diameter of the valve nozzle is fixedly connected with a direct pipe, a taper hole matched with a valve needle in a taper shape is formed in the center of the valve nozzle, and a taper diffusion hole is formed in the outer end of the taper hole; the guide screw is made of metal materials, the shape of the guide screw is generally in a cylindrical step shape, the large-end step of the outer circumference is welded with the corresponding hole of the connecting sleeve after being assembled, the middle section of the guide screw is provided with an external thread matched with the guide nut, the center of the guide screw is provided with a stepped hole, the large-aperture part is provided with a counter bore for installing the guide rail shaft, and then the stepped hole is used for installing the valve needle spring, the spring seat, the valve needle and the snap spring, and the small-aperture section is in clearance fit; the valve needle is made of stainless steel materials, one end of the valve needle is provided with a conical head matched with a conical hole of the valve nozzle, and the other end of the valve needle is provided with a groove for installing a clamp spring; the spring seat is in a stepped cylinder shape, the diameter of the small end of the spring seat is in clearance fit with the inner diameter of the valve needle spring, the diameter of the large end of the spring seat is in clearance fit with the aperture of the screw rod, and a spherical bearing point is arranged at the center of the end face of the large end; the magnetic ring is made of neodymium iron boron materials, is cylindrical in shape, one end of the magnetic ring is open, and the other end of the magnetic ring and the connecting sleeve are integrally injected; the positioning support is an annular part, a plurality of positioning holes are formed in the half circumference of the ring and used for positioning the rotor and the stator, and the positioning support is made of stainless steel materials; the connecting sleeve is made of stainless steel material, the shape is similar to a step ring shape, and the circumference of the upper part and the lower part of the maximum outer diameter is milled with flat potential, so that the connecting sleeve is more reliably combined with the magnetic ring during injection molding; the center of the connecting sleeve is a stepped hole, the small aperture is fixedly connected with the guide rail shaft, and the large aperture is fixedly connected with the screw rod.

2. The rotor of an electronic expansion valve according to claim 1, wherein the guiding nut is a welded ring as an injection molding part of the insert, and has a generally cylindrical step shape, and the outer circumference thereof is provided with a rib fixed to the valve seat by the welded ring, and the center thereof is a stepped hole, the large aperture is in clearance fit with the middle section of the screw rod, the middle section is a threaded hole matched with the screw rod, and the smallest front aperture is a guiding hole in clearance fit with the valve needle.

3. The rotor of an electronic expansion valve with the function of reducing the noise of a valve needle impacted by air flow as claimed in claim 1, wherein the guide rail shaft is an injection-molded threaded shaft provided with a central hole, the end part is provided with a counter bore for installing a valve needle spring and a stop shoulder matched with the connecting sleeve, and the middle part is provided with a balance hole.