Compressor blade double-spring structure and compressor
By incorporating a double-spring design with a limiting structure at the blade tail, the problems of spring jumping out during installation and deformation synchronization were solved, achieving both a fixed effect and deformation synchronization, and reducing blade inertial force and wear.
Patent Information
- Application Number
- CN202520281179.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In the prior art, when the blades of a rotary compressor have a large inertial force, a single spring is difficult to provide sufficient force. The double spring design is prone to jumping out during installation or poor synchronization of deformation during compressor operation, resulting in synchronization problems.
Two tail grooves are made at the tail of the blade, and a limiting structure is set in the tail groove to ensure that the spring does not jump out during installation and that the deformation is synchronized when the compressor is running.
The double springs achieve a secure hold during installation, ensuring the synchronization of deformation during compressor operation and reducing blade inertial force and wear.
Smart Images
Figure CN223767717U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rotary compressor technology, and relates to a compressor blade double spring structure and a compressor. Background Technology
[0002] When a rotary compressor is working, the motor drives the crankshaft to rotate. A piston is fitted onto the eccentric part of the crankshaft. Driven by the crankshaft, the piston rotates on the inner wall of the cylinder, dividing the cylinder's inner space into a low-pressure chamber and a high-pressure chamber together with the blades, thus completing the intake, compression, and discharge of gas. To prevent the blades from detaching from the piston due to inertial force during piston rotation, a spring needs to be installed at the tail end of the blades, so that the two form a dynamic seal under the action of the spring force.
[0003] In the prior art, a spring is usually provided at the tail of the cylinder blade. However, for blades that are heavy and have large inertial forces, the force provided by a single spring is difficult to meet the requirements. Therefore, a double spring design is introduced.
[0004] Patent CN219911142U discloses a rotary compressor and refrigeration cycle device, wherein the rear end of the blade is provided with two spring slots; double springs are provided in each spring slot of the blade. However, this patent does not mention the problem of spring installation and fixation or the realization of the synchronization of the deformation of the double springs during compressor operation. It only increases the number of blade slots. The two springs may jump out during installation and may be bent and deformed during compressor operation, resulting in different compression. Utility Model Content
[0005] The purpose of this invention is to overcome at least one defect of the prior art by providing a compressor blade double spring structure and a compressor. This invention ensures that the double springs will not jump out during installation and that the double springs are fixed after installation, and also ensures the synchronicity of the deformation of the double springs when the compressor is running.
[0006] The objective of this utility model can be achieved through the following technical solutions:
[0007] One of the technical solutions of this utility model is to provide a compressor blade double spring structure, wherein two tail grooves are opened at the tail of the blade, and two springs are installed in the two tail grooves respectively. A limiting structure is provided on the side wall of the tail groove that contacts the spring, and one end of the spring is limited by the limiting structure.
[0008] Furthermore, the tail groove of the blade is provided with a limiting structure of protrusion or groove.
[0009] Furthermore, the tail groove adopts a W-shaped tail groove or a V-shaped tail groove. The V-shaped tail groove is a spring receiving groove with a wide opening facing upwards in a V shape. The W-shaped tail groove has a protruding spring sleeve section at the center position inside the V-shaped tail groove. The spring sleeve section is a wide-base isosceles trapezoid or a similar wide-base isosceles trapezoid with arc-shaped sidewalls.
[0010] Furthermore, two springs are respectively sleeved on the spring sleeve sections of the two W-shaped tail grooves. The spring sleeve sections have a limiting structure with a protrusion or groove on the side wall in contact with the spring. There is a gap between the outer edge of the spring and the two side walls of the W-shaped tail groove.
[0011] Furthermore, the spring sleeve section has protrusions on both sides near the bottom of the groove. The protrusions are either raised dots or strip-shaped protrusions, and the protrusions are engaged in the inter-ring gap of the spring.
[0012] Alternatively, the root of the spring sleeve segment may have grooves on both sides of the groove wall.
[0013] Furthermore, the space between the two W-shaped tail grooves is a spring isolation section, and the height of the spring isolation section and the height of the spring sleeve section are 20-100% of the height of both sides of the blade.
[0014] Furthermore, two springs are respectively arranged in two V-shaped tail grooves, and protrusions are provided on the two side walls of the V-shaped tail grooves near the bottom of the grooves. There is a gap between the outer edge of the spring and the two side walls of the V-shaped tail grooves.
[0015] Furthermore, the protrusion is a dot or a strip-shaped protrusion, and the protrusion is engaged in the inter-ring gap of the spring.
[0016] Furthermore, the tail end of the blade is in the same plane or at an angle relative to the horizontal plane on both sides of the blade's thickness.
[0017] One of the technical solutions of this utility model is to provide a compressor, including the compressor blade double spring structure as described above.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] (1) This utility model ensures that the two springs will not jump out during installation and that the two springs are fixed after installation by setting a limiting structure on the contact side wall between the compressor blade tail groove and the spring. It also ensures the synchronicity of the deformation of the two springs during compressor operation.
[0020] (2) In this utility model, the blade tail groove can be a W-shaped tail groove or a V-shaped tail groove. When the blade tail groove is W-shaped, the height of the interval between the two W-shaped tail grooves, i.e. the height of the spring isolation part and the height of the spring sleeve section, can be reduced relative to the height of the two sides of the blade. Only the root limit is used to reduce the blade mass and reduce the blade inertial force.
[0021] (3) In this utility model, the tail end of the blade is in the same plane or at a chamfer relative to the horizontal plane on both sides of the blade's thickness. The chamfer can reduce blade wear in response to the friction caused by the blade contacting the intermediate plate and / or cylinder head. Attached Figure Description
[0022] Figure 1 This is a top view of the cylinder structure in Embodiment 1 of this utility model;
[0023] Figure 2 This is a schematic diagram of the main structure of the cylinder in Embodiment 1 of this utility model;
[0024] Figure 3 This is a schematic diagram of the structure of the blade tail in Embodiment 1 of this utility model;
[0025] Figure 4 This is a schematic diagram of the structure of the blade tail in Embodiment 2 of this utility model;
[0026] Figure 5 This is a schematic diagram of the structure of the blade tail in Embodiment 3 of this utility model;
[0027] Figure 6 This is a schematic diagram of the structure of the blade tail in Embodiment 4 of this utility model;
[0028] Figure 7 This is a schematic diagram of the structure of the blade tail in Embodiments 5 and 10 of this utility model;
[0029] Figure 8 This is a top view of the assembly diagram of the spring installed at the tail of the blade in Embodiment 5 of this utility model;
[0030] Figure 9 This is a top view of the assembly diagram of the spring installed at the tail of the blade in Embodiment 3 of this utility model;
[0031] Figure 10 This is a front view assembly diagram of the spring installed at the tail of the blade in Embodiments 5 and 10 of this utility model;
[0032] Figure 11 This is a front view assembly diagram of the spring installed at the tail of the blade in Embodiment 3 of this utility model.
[0033] Explanation of markings in the diagram:
[0034] 1—Cylinder, 2—Piston, 3—Crankshaft eccentricity, 4—Blade, 5—Spring, 6—First spring, 7—Second spring, 8—Tail groove, 9—W-shaped tail groove, 10—V-shaped tail groove, 11—Spring sleeve section, 12—Both side groove walls, 13—Protrusion, 14—Groove. Detailed Implementation
[0035] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.
[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and are not intended to imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] A compressor blade double-spring structure, such as Figure 1 and Figure 2 As shown, the cylinder 1 has two spring holes, one above the other, which are symmetrically arranged along the height of the cylinder 1. The axis of the spring hole is parallel to the axis of the spring 5 installed on the blade 4. The distance between the axes must meet certain requirements to ensure that the wall surface is subjected to uniform force. That is, when the diameter of the spring hole and the height of the cylinder 1 are determined, the distance between the axes of the two spring holes will affect the wall thickness of the spring hole of the cylinder 1. It is necessary to ensure that the wall thickness does not crack under the action of spring force.
[0039] Two springs 5 are arranged in the two spring holes respectively, namely the first spring 6 and the second spring 7. The two springs 5 are identical. When the springs 5 are assembled, one end of the spring 5 is fixed to the tail of the blade 4, and the other end is fixed to the wall of the spring hole.
[0040] When the compressor is running, the piston 2 rotates in the inner cavity of the cylinder 1 under the drive of the crankshaft eccentric 3. When the piston 2 rotates to the highest point and rotates downward, the blade 4 still has an upward inertial force. In order to prevent the blade 4 from separating from the piston 2, two springs 5 can be used to provide spring force to ensure that the blade 4 and the piston 2 are always in contact, so as to complete the intake, compression and discharge of gas.
[0041] Two tail grooves 8 are provided at the tail of the blade 4, and two springs 5 are installed in the two tail grooves 8 respectively;
[0042] Spring 5 is arranged in tail groove 8, tail groove 8 is in contact with spring 5, and a limiting structure is provided on the side wall of tail groove 8 in contact with spring 5, and one end of spring 5 is limited by the limiting structure.
[0043] The tail groove 8 of the blade 4 is provided with a limiting structure of protrusion 13 or groove 14;
[0044] The tail groove 8 adopts a W-shaped tail groove 9 or a V-shaped tail groove 10. The V-shaped tail groove 10 is a wide-mouthed, upward-facing V-shaped spring receiving groove. The W-shaped tail groove 9 has a protruding spring sleeve section 11 at the center position inside the V-shaped tail groove 10. The spring sleeve section 11 is a wide-base isosceles trapezoid or a similar wide-base isosceles trapezoid with arc-shaped sidewalls.
[0045] A compressor comprising the aforementioned compressor blade double-spring structure.
[0046] The following embodiments describe the types of spring 5, tail groove 8, and limiting structure respectively.
[0047] Example 1:
[0048] A compressor blade double-spring structure, such as Figure 3 As shown, two springs 5 are respectively sleeved on the spring sleeve sections 11 of the two W-shaped tail grooves 9. The spring sleeve sections 11 have a limiting structure with a protrusion 13 on the side wall in contact with the springs 5. The limiting structure limits the movement. There is a certain gap between the outer edge of the springs 5 and the two side walls of the W-shaped tail grooves 9. The gap should not be too large.
[0049] The spring sleeve section 11 is an isosceles trapezoid with a wide base. The spring sleeve section 11 has protrusions 13 on both side walls near the bottom of the groove. The protrusions 13 are protrusions or strip-shaped protrusions. The protrusions 13 match the mounting end coil of the spring 5. The protrusions 13 are engaged in the inter-ring gap of the mounting end coil of the spring 5. When the spring 5 is disengaged from the bottom of the spring sleeve section 11, it is blocked by the protrusions 13 to limit the position of the spring 5.
[0050] The space between the two W-shaped tail grooves 9 is a spring isolation part. The height of the spring isolation part and the height of the spring sleeve section 11 are the same as the height of both sides of the blade 4.
[0051] The tail end of blade 4 is in the same plane relative to the horizontal planes on both sides of its thickness.
[0052] Blade 4 maintains symmetry in the height direction.
[0053] Example 2:
[0054] A compressor blade double-spring structure is basically the same as that in Embodiment 1, except that, as Figure 4 As shown, the spring sleeve section 11 can also be a trapezoid with a wide base and an arc-shaped sidewall. The grooves on both sides of the root of the spring sleeve section 11 are provided with grooves 14. The grooves 14 match the mounting end coil of the spring 5. The mounting end coil of the spring 5 is engaged in the grooves 14 to limit the position of the spring 5.
[0055] The remaining structure is as follows:
[0056] Two springs 5 are respectively sleeved on the spring sleeve sections 11 of the two W-shaped tail grooves 9. The spring sleeve sections 11 have a groove 14 on the side wall in contact with the springs 5 to limit the movement. The outer edge of the springs 5 has a certain gap with the two side walls of the W-shaped tail grooves 9. The gap should not be too large.
[0057] The space between the two W-shaped tail grooves 9 is a spring isolation part. The height of the spring isolation part and the height of the spring sleeve section 11 are the same as the height of both sides of the blade 4.
[0058] The tail end of blade 4 is in the same plane relative to the horizontal planes on both sides of its thickness.
[0059] Blade 4 maintains symmetry in the height direction.
[0060] Example 3:
[0061] A compressor blade double-spring structure is basically the same as that in Embodiment 2, except that, as Figure 5 , Figure 9 and Figure 11 As shown, the space between the two W-shaped tail grooves 9 is a spring isolation part. The height of the spring isolation part and the height of the spring sleeve section 11 can be reduced to 20% of the height of both sides of the blade 4. By relying on the root limit of the spring sleeve section 11, the inertial force of the blade is reduced and the material consumption is reduced.
[0062] The remaining structure is as follows:
[0063] Two springs 5 are respectively sleeved on the spring sleeve sections 11 of the two W-shaped tail grooves 9. The spring sleeve sections 11 have a limiting structure on the side wall in contact with the springs 5. The limiting structure limits the movement. There is a certain gap between the outer edge of the springs 5 and the two side walls of the W-shaped tail grooves 9. The gap should not be too large.
[0064] The spring sleeve section 11 can be a wide-base isosceles trapezoid or a similar wide-base isosceles trapezoid with arc-shaped sidewalls. The bottom two sides of the spring sleeve section 11 are provided with grooves 14. The grooves 14 match the mounting end coil of the spring 5. The mounting end coil of the spring 5 is engaged in the grooves 14 to limit the position of the spring 5.
[0065] The tail end of blade 4 is in the same plane relative to the horizontal planes on both sides of its thickness.
[0066] Blade 4 maintains symmetry in the height direction.
[0067] Example 4:
[0068] A compressor blade double-spring structure is basically the same as that in Embodiment 1, except that, as Figure 6 As shown, the space between the two W-shaped tail grooves 9 is a spring isolation part. The height of the spring isolation part and the height of the spring sleeve section 11 can be reduced to 20% of the height of both sides of the blade 4. By relying on the root limit of the spring sleeve section 11, the inertial force of the blade is reduced and the material consumption is reduced.
[0069] The remaining structure is as follows:
[0070] Two springs 5 are respectively sleeved on the spring sleeve sections 11 of the two W-shaped tail grooves 9. The spring sleeve sections 11 have a limiting structure on the side wall in contact with the springs 5. The limiting structure limits the movement. There is a certain gap between the outer edge of the springs 5 and the two side walls of the W-shaped tail grooves 9. The gap should not be too large.
[0071] The spring sleeve section 11 can be a wide-base isosceles trapezoid or a similar wide-base isosceles trapezoid with arc-shaped sidewalls. The spring sleeve section 11 has protrusions 13 on both side walls near the bottom of the groove. The protrusions 13 are protrusions or strip-shaped protrusions. The protrusions 13 match the mounting end coil of the spring 5. The protrusions 13 are locked in the inter-ring gap of the mounting end coil of the spring 5. When the spring 5 is removed from the bottom of the spring sleeve section 11, it is blocked by the protrusions 13 to limit the position of the spring 5.
[0072] The tail end of blade 4 is in the same plane relative to the horizontal planes on both sides of its thickness.
[0073] Blade 4 maintains symmetry in the height direction.
[0074] Example 5:
[0075] A compressor blade double-spring structure is basically the same as that in Embodiment 1, except that, as Figure 7 , Figure 8 and Figure 10 As shown, in addition to the W-shaped tail groove 9, the two springs 5 can also be arranged in the two V-shaped tail grooves 10 respectively. The two side walls 12 of the V-shaped tail groove 10 near the bottom of the groove are provided with protrusions 13. The limiting structure at the tail of the blade 4 is used to limit the spring 5. There is a certain gap between the outer edge of the spring 5 and the two side walls 12 of the V-shaped tail groove 10. The gap should not be too large.
[0076] The protrusion 13 is a protrusion or a strip-shaped protrusion. The protrusion 13 matches the mounting end coil of the spring 5. The protrusion 13 is locked in the inter-ring gap of the mounting end coil of the spring 5. When the spring 5 is disengaged from the bottom of the V-shaped tail groove 10, it is blocked by the protrusion 13 to achieve the limiting of the spring 5.
[0077] The remaining structure is as follows:
[0078] The tail end of blade 4 is in the same plane relative to the horizontal planes on both sides of its thickness.
[0079] Blade 4 maintains symmetry in the height direction.
[0080] Example 6:
[0081] A compressor blade double spring structure, based on the structure of embodiment 1, further includes a chamfered angle at the tail end of the blade 4 relative to the horizontal plane on both sides of its thickness. The chamfered angle can reduce the wear of the blade 4 due to the friction phenomenon caused by the end face contact between the blade 4 and the intermediate plate and / or cylinder head.
[0082] Example 7:
[0083] A compressor blade double spring structure, based on the structure of embodiment 2, further includes a chamfered angle at the tail end of the blade 4 relative to the horizontal plane on both sides of its thickness. The chamfered angle can reduce the wear of the blade 4 due to the friction phenomenon caused by the contact between the blade 4 and the intermediate plate and / or cylinder head at the end face.
[0084] Example 8:
[0085] A compressor blade double spring structure, based on the structure of embodiment 3, further includes a chamfered angle at the tail end of the blade 4 relative to the horizontal plane on both sides of its thickness. The chamfered angle can reduce the wear of the blade 4 due to the friction phenomenon caused by the end face contact between the blade 4 and the intermediate plate and / or cylinder head.
[0086] Example 9:
[0087] A compressor blade double spring structure, based on the structure of embodiment 4, further includes a chamfered angle at the tail end of the blade 4 relative to the horizontal plane on both sides of its thickness. The chamfered angle can reduce the wear of the blade 4 due to the friction phenomenon caused by the end face contact between the blade 4 and the intermediate plate and / or cylinder head.
[0088] Example 10:
[0089] A compressor blade double-spring structure, such as Figure 7 and Figure 10 As shown, based on the structure of embodiment 5, the tail end of blade 4 is further chamfered relative to the horizontal plane on both sides of its thickness. The chamfer can reduce the wear of blade 4 due to the friction caused by the contact between blade 4 and intermediate plate and / or cylinder head.
[0090] In summary, this invention, by setting a limiting structure on the contact side wall between the compressor blade 4 and the spring 5 in the tail groove 8, ensures that neither of the double springs 5 will jump out during installation and maintains the fixation effect after installation, and also ensures the synchronization of the deformation of the double springs 5 during compressor operation. The tail groove 8 of the blade 4 can be a W-shaped tail groove 9 or a V-shaped tail groove 10. When the tail groove 8 of the blade 4 is W-shaped, the height of the spring isolation part between the two W-shaped tail grooves 9 and the height of the spring sleeve section 11 can be reduced relative to the height of both sides of the blade 4. Relying only on the root limiting, the mass of the blade 4 is reduced, and the inertial force of the blade 4 is reduced. Furthermore, the tail end of the blade 4 can be selectively chamfered relative to the horizontal plane on both sides of its thickness. The chamfer can reduce the wear of the blade 4 due to the friction caused by the end face contact between the blade 4 and the intermediate plate and / or cylinder head.
[0091] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.
Claims
1. A compressor blade double spring structure, the tail of a blade (4) is provided with two tail grooves (8), two springs (5) are respectively installed in the two tail grooves (8), characterized in that, The tail groove (8) is provided with a limiting structure on the contact side wall of the spring (5), and one end of the spring (5) is limited by the limiting structure.
2. The dual spring structure of a compressor blade according to claim 1, wherein The tail groove (8) of the blade (4) is provided with a limiting structure of a protruding part (13) or a groove part (14).
3. A double spring structure for a compressor blade according to claim 1 or 2, characterized in that The tail groove (8) is a W-shaped tail groove (9) or a V-shaped tail groove (10), the V-shaped tail groove (10) is a spring containing groove with a wide mouth and a V shape upward, and the W-shaped tail groove (9) is provided with a spring taking section (11) protruding at the center position in the V-shaped tail groove (10), and the spring taking section (11) is an isosceles trapezoid with a wide bottom or an arc-shaped isosceles trapezoid with a wide bottom.
4. The dual spring structure of claim 3, wherein, Two springs (5) are respectively sleeved on the spring taking sections (11) of the two W-shaped tail grooves (9), the spring taking sections (11) are provided with a limiting structure of a protruding part (13) or a groove part (14) on the contact side wall of the spring (5), and a gap exists between the outer edge of the spring (5) and the two side groove walls (12) of the W-shaped tail groove (9).
5. The dual spring structure of claim 4, wherein the first spring is a helical spring and the second spring is a leaf spring. The two side walls of the spring taking section (11) close to the groove bottom are provided with a protruding part (13), the protruding part (13) is a protruding point or a strip-shaped protruding part, and the protruding part (13) is clamped in the ring gap of the spring (5). Or the two side groove walls of the root of the spring taking section (11) are provided with a groove part (14).
6. The dual spring structure of claim 3, wherein, The interval part between the two W-shaped tail grooves (9) is a spring isolation part, the height of the spring isolation part and the height of the spring taking section (11) are 20-100% of the height of the two sides of the blade (4).
7. The dual spring structure of claim 3, wherein the first spring is a helical spring and the second spring is a leaf spring. Two springs (5) are respectively arranged in the two V-shaped tail grooves (10), the two side groove walls (12) of the V-shaped tail groove (10) close to the groove bottom are provided with a protruding part (13), and a gap exists between the outer edge of the spring (5) and the two side groove walls (12) of the V-shaped tail groove (10).
8. The dual spring structure of claim 7, wherein, The protruding part (13) is a protruding point or a strip-shaped protruding part, and the protruding part (13) is clamped in the ring gap of the spring (5).
9. The dual spring structure of claim 1, wherein, The tail end of the blade (4) is in the same plane or an inverted inclined angle relative to the horizontal plane on both sides of the thickness of the blade (4).
10. A compressor characterized by, The compressor blade double spring structure comprises the compressor blade double spring structure according to any one of claims 1 to 9.