Quasi-zero stiffness foot pad, compressor and refrigeration and heating equipment

Abstract

The application provides a quasi-zero stiffness foot pad, a compressor and a refrigeration and heating device. The quasi-zero stiffness foot pad comprises a rubber foot pad, the rubber foot pad comprises a conical section, a ring-shaped seat and a connecting column, the conical section is connected with the connecting column at a necked end, the conical section is connected with the ring-shaped seat at a flared end, the connecting column is provided with a support part extending into the conical section at one end, the support part is provided with an inner magnetic ring, and the ring-shaped seat is provided with an outer magnetic ring matched with the inner magnetic ring to generate a magnetic force. In use, the foot of the object to be isolated is connected with the connecting column, the object to be isolated is supported by the elastic force of the conical section and the ring-shaped seat and the magnetic force between the inner magnetic ring and the outer magnetic ring, and the object to be isolated compresses the conical section and the ring-shaped seat, so that the conical section and the inner magnetic ring reach a balanced working position, at this time, the quasi-zero stiffness foot pad is in a quasi-zero stiffness state, thereby reducing the effective isolation frequency, widening the isolation frequency range and significantly increasing the isolation effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and more particularly relates to a quasi-zero stiffness foot pad, a compressor and a refrigeration and heating device. BACKGROUND

[0002] In related technologies, a motor and a compression mechanism are installed in a casing of a compressor, the motor drives the compression mechanism to run to compress gas. A bottom foot is arranged at the bottom of the casing to be connected with a mounting seat of a household appliance, so as to support the compressor on the mounting seat. When the compressor is running, the running of the motor and the compression mechanism will generate vibration, which will be conducted to the mounting seat through the casing and the bottom plate, resulting in relatively large noise and vibration, and even the risk of resonance.

[0003] In order to attenuate the vibration energy generated by the compressor, the existing compressor damping system mainly consists of a rubber foot pad, a sleeve and a bolt. The installation mode is that the bottom foot of the compressor is embedded into the corresponding groove of the rubber foot pad, and the bolt of the compressor passes through the sleeve to fix the rubber foot pad on the mounting seat. The gap fit exists between the bolt and the sleeve, and between the sleeve and the foot pad, so as to realize the circumferential weak constraint; the bolt is in contact with the top of the rubber foot pad, and the bottom foot of the compressor is embedded in the corresponding groove of the rubber foot pad, so as to realize the axial weak constraint. In this way, the vibration energy attenuation in the circumferential and axial directions is realized at the same time.

[0004] However, since the gap between the bolt-sleeve and the sleeve-rubber foot pad is relatively limited, and the compressible amount of the cylindrical structure of the lower half of the rubber foot pad is small, the vibration energy attenuation degree in the circumferential and axial directions of the compressor is limited, and the vibration in the actual running process is still large. Moreover, since the effective vibration isolation frequency point of the rubber foot pad is high, under the action of the circumferential force and the tangential force, the rubber foot pad may be crushed when the compressor vibrates violently at high frequency. At this time, the vibration energy is directly transmitted to the mounting seat, resulting in excessive noise and vibration, and insufficient vibration isolation effect. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a quasi-zero stiffness foot pad, a compressor and a refrigeration and heating device, so as to solve the problem that the existing compressor adopts a damping system consisting of a rubber foot pad, a sleeve and a bolt, and the vibration isolation frequency point is high and the vibration isolation effect is insufficient.

[0006] To achieve the above object, the technical scheme adopted by the embodiment of the present application is as follows: a quasi-zero stiffness foot pad is provided, which comprises a rubber foot pad, the rubber foot pad comprises a conical section for providing a nonlinear supporting force, a ring-shaped seat, and a connecting column for connecting a supporting leg of an object to be isolated, the conical section is connected with the connecting column at a necked end, the conical section is connected with the ring-shaped seat at a flared end, the connecting column has a supporting part extending into the conical section at an end of the necked end, an inner magnetic ring is mounted on the supporting part, an outer magnetic ring is arranged on the ring-shaped seat for cooperating with the inner magnetic ring to generate a magnetic force, and the inner magnetic ring and the outer magnetic ring are coaxially arranged.

[0007] In an optional embodiment, the inner magnetic ring and the outer magnetic ring are both axially magnetized.

[0008] In an optional embodiment, the inner magnetic ring and the outer magnetic ring are magnetized in opposite directions.

[0009] In an optional embodiment, the inner magnetic ring is located above the outer magnetic ring when the rubber foot pad statically supports the object to be isolated, the inner magnetic ring and the outer magnetic ring are both radially magnetized, and the inner magnetic ring and the outer magnetic ring are magnetized in opposite directions.

[0010] In an optional embodiment, an axial middle surface of the inner magnetic ring is adjacent to an axial middle surface of the outer magnetic ring when the rubber foot pad statically supports the object to be isolated, the inner magnetic ring and the outer magnetic ring are both radially magnetized, and the inner magnetic ring and the outer magnetic ring are magnetized in the same direction.

[0011] In an optional embodiment, an inner circumferential surface of the ring-shaped seat is provided with an inner ring groove, and the outer magnetic ring is mounted in the inner ring groove.

[0012] In an optional embodiment, an outer circumferential surface of the supporting part is provided with an outer ring groove, and the inner magnetic ring is mounted in the outer ring groove.

[0013] In an optional embodiment, the flared end of the conical section is connected with an upper end of the ring-shaped seat, or the upper end of the ring-shaped seat has a convex ring part protruding from the conical section.

[0014] In an optional embodiment, a through hole for inserting a sleeve is arranged in the connecting column, and the through hole is arranged through in the axial direction of the connecting column.

[0015] In an optional embodiment, a first ring groove is arranged on the side of the top end of the connecting column for positioning the supporting leg of the object to be isolated.

[0016] In an optional embodiment, a first boss is protruded on the side of the connecting column for positioning the upper surface of the supporting leg of the object to be isolated, and the first boss is located at the upper end of the first ring groove.

[0017] In an optional embodiment, a second boss for supporting the foot of the object to be isolated is protruded from the circumferential side of the connecting column, and the second boss is located at the lower end of the first annular groove.

[0018] In an optional embodiment, a second annular groove is arranged on the circumferential side of the connecting column, and the second annular groove is located between the second boss and the conical segment.

[0019] Another purpose of the embodiments of the present application is to provide a compressor comprising a body and the quasi-zero stiffness foot pad according to any one of the above embodiments, wherein the body is provided with a foot, and the foot is connected to the connecting column.

[0020] Still another purpose of the embodiments of the present application is to provide a refrigeration and heating device comprising the compressor according to any one of the above embodiments.

[0021] The quasi-zero stiffness foot pad provided by the embodiments of the present application has the following beneficial effects: compared with the prior art, the quasi-zero stiffness foot pad provided by the embodiments of the present application is provided with a conical segment on a rubber foot pad, a connecting column and an annular seat are arranged at opposite ends of the conical segment respectively, a supporting portion of the connecting column is extended into the conical segment, an inner magnetic ring is arranged on the supporting portion located in the conical segment, and an outer magnetic ring is arranged on the inner wall of the annular seat; in use, the foot of the object to be isolated is connected to the connecting column, the object to be isolated is supported by the elastic force of the conical segment and the annular seat and the magnetic force between the inner magnetic ring and the outer magnetic ring, and the object to be isolated compresses the conical segment and the annular seat until the conical segment and the inner magnetic ring are displaced to reach an equilibrium working position, at which time the quasi-zero stiffness foot pad is in a quasi-zero stiffness state, thereby reducing the effective isolation frequency, widening the isolation frequency range, and significantly increasing the isolation effect.

[0022] The compressor provided by the embodiments of the present application has the following beneficial effects: compared with the prior art, the compressor provided by the embodiments of the present application uses the quasi-zero stiffness foot pad provided by the above embodiments, has the technical effects of the quasi-zero stiffness foot pad, and has good vibration isolation effect at low frequency and can also achieve good vibration reduction when the compressor vibrates violently at high frequency.

[0023] The refrigeration and heating device provided by the embodiments of the present application has the following beneficial effects: compared with the prior art, the refrigeration and heating device provided by the embodiments of the present application uses the compressor provided by the above embodiments, has the technical effects of the compressor, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0025] Figure 1 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0026] Figure 2 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0027] Figure 3 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0028] Figure 4 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0029] Figure 5 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0030] Figure 6 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0031] Figure 7 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0032] Figure 8 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0033] Figure 9 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0034] Figure 10 Structure schematic diagram of the quasi-zero stiffness foot pad provided in the first embodiment of the present application;

[0035] In the drawings, the main marks are as follows:

[0036] 100-Quasi-zero stiffness foot pad;

[0037] 10 - rubber foot pad; 11 - annular seat; 111 - inner annular groove; 112 - convex ring portion; 12 - conical section; 121 - flared end; 122 - constricted end; 13 - connecting column; 131 - support portion; 132 - outer annular groove; 133 - through hole; 1331 - first chamfer; 134 - first annular groove; 135 - first boss; 1351 - second chamfer; 136 - second boss; 137 - second annular groove;

[0038] 21 - inner magnetic ring; 22 - outer magnetic ring;

[0039] 31 - leg; 32 - sleeve. DETAILED DESCRIPTION

[0040] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more than one, unless otherwise explicitly and specifically limited. The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. The orientations or positional relationships indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0044] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0045] Please refer to Figure 1 , Figure 2 and Figure 5 , now the quasi-zero stiffness foot pad 100 provided by the application will be described. The quasi-zero stiffness foot pad 100 comprises a rubber foot pad 10, an inner magnetic ring 21 and an outer magnetic ring 22. The inner magnetic ring 21 and the outer magnetic ring 22 are both mounted on the rubber foot pad 10, and the inner magnetic ring 21 and the outer magnetic ring 22 are supported by the rubber foot pad 10, so that the inner magnetic ring 21 and the outer magnetic ring 22 generate a magnetic force action between them to form a negative stiffness structure.

[0046] The rubber foot pad 10 comprises a conical section 12, an annular seat 11 and a connecting column 13. The conical section 12 refers to a conical rubber section. The conical section 12 has a flared end 121 and a tapered end 122. The flared end 121 is the larger diameter end of the conical section 12, and the tapered end 122 is the smaller diameter end of the conical section 12. The tapered end 122 of the conical section 12 is connected to the connecting column 13, and the flared end 121 of the conical section 12 is connected to the annular seat 11. The connecting column 13 has a support part 131, which is located at the end of the connecting column 13 close to the annular seat 11, i.e. the end of the connecting column 13 connected to the tapered end 122 extends the support part 131, and the support part 131 extends into the conical section 12. The inner magnetic ring 21 is mounted on the support part 131 and supported by the support part 131. The outer magnetic ring 22 is mounted on the annular seat 11 and supported by the annular seat 11, so that the inner magnetic ring 21 and the outer magnetic ring 22 are coaxially arranged.

[0047] The inner magnetic ring 21 is coaxially arranged with the outer magnetic ring 22, which can ensure that the force acting on the side of the inner magnetic ring 21 by the outer magnetic ring 22 is balanced.

[0048] Since the rubber foot pad 10 is formed by the conical segment 12, the annular seat 11 and the connecting column 13, the annular seat 11 has positive stiffness, i.e. provides linear support force, while the conical segment 12 is used to provide nonlinear support force. The magnetic force between the inner magnetic ring 21 and the outer magnetic ring 22 forms negative stiffness, which provides nonlinear support force.

[0049] According to the force and displacement characteristics of the vibration isolation system, the positive stiffness often provides linear support force, and the force and displacement change is proportional to the positive stiffness, which corresponds to a straight line passing through the origin in the force and displacement coordinate graph with the horizontal coordinate being displacement and the vertical coordinate being force. The nonlinear support force has quasi-zero stiffness at the equilibrium point, and has negative stiffness near the equilibrium point, has positive stiffness far from the equilibrium point, and the negative stiffness corresponds to a curve with negative slope in the force and displacement coordinate graph, while the positive stiffness corresponds to a curve with positive slope in the force and displacement coordinate graph. The stiffness of the vibration isolation system with linear support force and nonlinear support force is the combination of the stiffness corresponding to the linear support force and the stiffness corresponding to the nonlinear support force, which forms a nonlinear vibration isolation system. Correspondingly, the nonlinear vibration isolation system has an equilibrium working position, at which the stiffness of the vibration isolation system is close to zero, i.e. forms quasi-zero stiffness.

[0050] And the annular seat 11 of the rubber foot pad 10 has positive stiffness, while the conical segment 12, the inner magnetic ring 21 and the outer magnetic ring 22 provide nonlinear support force respectively, and have negative stiffness near the equilibrium point, so that the whole formed by the rubber foot pad 10, the inner magnetic ring 21 and the outer magnetic ring 22 forms a nonlinear vibration isolation system, and at the equilibrium working position, the stiffness is close to zero, i.e. forms the quasi-zero stiffness foot pad 100.

[0051] In use, the connecting column 13 is connected with the foot 31 of the object to be isolated, and the annular seat 11 supports the conical section 12, and then supports the object to be isolated through the connecting column 13, so as to constrain the radial vibration of the object to be isolated. When statically supporting the object to be isolated, due to the gravity of the object to be isolated, the annular seat 11 and the conical section 12 are compressed and deformed, and the inner magnetic ring 21 on the supporting part 131 of the connecting column 13 moves downward, the direction of the upward and downward movement of the supporting part 131 is consistent with the axial direction of the inner magnetic ring 21 and the outer magnetic ring 22, so that the quasi-zero stiffness foot pad 100 reaches the balance point or the vicinity of the balance point, and then the quasi-zero stiffness vibration reduction of the object to be isolated is realized. When the object to be isolated axially vibrates, under the action of the gravity of the object to be isolated, the linear supporting force of the annular seat 11, the force of the outer magnetic ring 22 on the inner magnetic ring 21 and the nonlinear supporting force of the conical section 12, the connecting column 13 is always in the ideal balanced position with the dynamic stiffness close to zero in the axial direction, and the quasi-zero stiffness vibration reduction is realized. According to the vibration reduction principle, the closer the stiffness is to zero, the wider the effective frequency range of the vibration isolation is, the lower the effective frequency is, and the better the vibration isolation effect is. Therefore, the quasi-zero stiffness foot pad 100 can have good vibration reduction effect on low-frequency and high-frequency vibrations, and good vibration reduction effect of the quasi-zero stiffness foot pad 100 is ensured.

[0052] Compared with the prior art, the quasi-zero stiffness foot pad 100 provided by the embodiment of the application has the following advantages. The quasi-zero stiffness foot pad 100 is provided by arranging the conical section 12 on the rubber foot pad 10, arranging the connecting column 13 and the annular seat 11 at two ends of the conical section 12 respectively, extending the supporting part 131 of the connecting column 13 to the conical section 12, arranging the inner magnetic ring 21 on the supporting part 131, and arranging the outer magnetic ring 22 in the annular seat 11. In use, the foot 31 of the object to be isolated is connected with the connecting column 13, the object to be isolated is supported by the elastic force of the conical section 12 and the annular seat 11 and the magnetic force between the inner magnetic ring 21 and the outer magnetic ring 22, and the object to be isolated compresses the conical section 12 and the annular seat 11, so that the conical section 12 and the inner magnetic ring 21 reach the balanced working position. At this time, the quasi-zero stiffness foot pad 100 is in the quasi-zero stiffness state, so that the effective vibration isolation frequency is reduced, the vibration isolation frequency range is widened, and the vibration isolation effect can be significantly increased.

[0053] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The inner magnetic ring 21 is an annular structure made of a permanent magnetic material, so as to facilitate installation and use. Of course, the inner magnetic ring 21 can also adopt a plurality of permanent magnet annular arrays to form a ring-shaped magnet.

[0054] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4The outer magnetic ring 22 is made of a ring structure of permanent magnetic material for convenient installation and use. Of course, the outer magnetic ring 22 can also be made of a ring array of multiple permanent magnets to form a ring magnet.

[0055] In one embodiment, referring to Figure 2 and Figure 3 , the inner circumferential surface of the annular seat 11 is provided with an inner ring groove 111 for positioning and accommodating the outer magnetic ring 22, so that the outer magnetic ring 22 can be installed in the inner ring groove 111 during assembly to fix the outer magnetic ring 22.

[0056] In one embodiment, the outer circumferential surface of the support portion 131 is provided with an outer ring groove 132, and the inner magnetic ring 21 can be installed in the outer ring groove 132 during assembly to position and accommodate the inner magnetic ring 21 through the outer ring groove 132 for installation and fixation of the inner magnetic ring 21.

[0057] In one embodiment, the upper end of the annular seat 11 is connected to the flared end 121 of the conical section 12, that is, the annular seat 11 is extended downward from the flared end of the conical section 12, which is convenient for processing and manufacturing, and facilitates the annular seat 11 to support the conical section 12.

[0058] In one embodiment, referring to Figure 2 , Figure 3 and Figure 5 , the connecting column 13 is provided with a through hole 133, and the through hole 133 is provided through the axial direction of the connecting column 13, so that the sleeve 32 can be inserted into the through hole 133 to connect with the connecting column 13 during use of the quasi-zero stiffness foot pad 100, and then the connecting column 13 and the leg 31 of the object to be isolated can be connected by using bolts.

[0059] In one embodiment, the first chamfer 1331 is provided at the top end of the through hole 133 of the connecting column 13 to guide the insertion of the sleeve 32 into the through hole 133, facilitating the assembly of the sleeve 32.

[0060] In one embodiment, referring to Figure 2 , Figure 3 and Figure 5 , the connecting column 13 is provided with a first ring groove 134 on the side, and the first ring groove 134 is located at the top end of the connecting column 13, so that the connecting column 13 can be inserted into the opening of the leg 31 of the object to be isolated during use of the quasi-zero stiffness foot pad 100, and the side wall of the opening extends into the first ring groove 134 to position and support the leg 31, ensuring the stability of the connection.

[0061] In one embodiment, the first protrusion 135 is arranged on the circumferential side of the connecting column 13, and is located at the upper end of the first annular groove 134. When the connecting column 13 is connected to the foot 31 of the object to be isolated, the foot 31 of the object to be isolated extends into the first annular groove 134, and the first protrusion 135 can abut against the upper surface of the foot 31 of the object to be isolated to position the foot 31.

[0062] In one embodiment, the top edge of the circumferential side of the first protrusion 135 is provided with a second chamfer 1351, so as to guide the insertion of the first protrusion 135 into the opening of the foot 31, and facilitate the installation and use.

[0063] In one embodiment, the second protrusion 136 is arranged on the circumferential side of the connecting column 13, and is located at the lower end of the first annular groove 134. When the connecting column 13 is connected to the foot 31 of the object to be isolated, the foot 31 of the object to be isolated extends into the first annular groove 134, and the foot 31 can be supported on the second protrusion 136. The foot 31 of the object to be isolated is supported by the second protrusion 136, and the support is more stable.

[0064] In one embodiment, the second annular groove 137 is arranged on the circumferential side of the connecting column 13, and is located between the second protrusion 136 and the conical section 12. In this way, the outer diameter of the region between the second protrusion 136 and the conical section 12 can be made smaller, and the length of the conical section 12 can be increased, so as to improve the elasticity of the conical section 12 and make the conical section 12 more easily deformed.

[0065] In one embodiment, please refer to Figure 5 and Figure 6 The inner magnetic ring 21 is axially magnetized, that is, the inner magnetic ring 21 is magnetized along the axial direction. In other words, the magnetic poles of the two axial ends of the inner magnetic ring 21 are opposite. For example, if the upper end of the inner magnetic ring 21 is an N pole, the lower end of the inner magnetic ring 21 is an S pole. If the upper end of the inner magnetic ring 21 is an S pole, the lower end of the inner magnetic ring 21 is an N pole.

[0066] In one embodiment, please refer to Figure 5 and Figure 6 The outer magnetic ring 22 is axially magnetized, that is, the outer magnetic ring 22 is magnetized along the axial direction. In other words, the magnetic poles of the two axial ends of the outer magnetic ring 22 are opposite. For example, if the upper end of the outer magnetic ring 22 is an N pole, the lower end of the outer magnetic ring 22 is an S pole. If the upper end of the outer magnetic ring 22 is an S pole, the lower end of the outer magnetic ring 22 is an N pole.

[0067] In one embodiment, the inner magnetic ring 21 and the outer magnetic ring 22 are magnetized in opposite directions, that is, the magnetic poles at the upper end of the inner magnetic ring 21 are opposite to the magnetic poles at the upper end of the outer magnetic ring 22, and the magnetic poles at the lower end of the inner magnetic ring 21 are opposite to the magnetic poles at the lower end of the outer magnetic ring 22; for example, if the upper end of the inner magnetic ring 21 is an N pole, and the lower end of the inner magnetic ring 21 is an S pole, then the upper end of the outer magnetic ring 22 is an S pole, and the lower end of the outer magnetic ring 22 is an N pole; if the upper end of the inner magnetic ring 21 is an S pole, and the lower end of the inner magnetic ring 21 is an N pole, then the upper end of the outer magnetic ring 22 is an N pole, and the lower end of the outer magnetic ring 22 is an S pole.

[0068] In one embodiment, referring to Figure 6 , the axial magnetization directions of the inner magnetic ring 21 and the outer magnetic ring 22 are opposite, and when the quasi-zero stiffness foot pad 100 is in use, the weight of the object to be isolated compresses the annular seat 11 and the conical section 12 to make the quasi-zero stiffness foot pad 100 reach the equilibrium point or the vicinity of the equilibrium point. Referring to Figure 6 , if the axial middle surface of the inner magnetic ring 21 is located near the axial middle surface of the outer magnetic ring 22 or coincides with the axial middle surface of the outer magnetic ring 22, that is, the axial middle surface of the inner magnetic ring 21 is adjacent to the axial middle surface of the outer magnetic ring 22, then a magnetic attraction force is formed between the inner magnetic ring 21 and the outer magnetic ring 22, and when the object to be isolated vibrates to produce axial displacement, the magnetic attraction force between the inner magnetic ring 21 and the outer magnetic ring 22 and the elastic support force of the annular seat 11 and the conical section 12 can make the axial middle surface of the inner magnetic ring 21 be located near the axial middle surface of the outer magnetic ring 22, that is, the inner magnetic ring 21 and the shaft core are always in the ideal equilibrium position with dynamic stiffness close to zero along the axial direction, and quasi-zero stiffness vibration reduction is achieved.

[0069] In one embodiment, referring to Figure 7 , the axial magnetization directions of the inner magnetic ring 21 and the outer magnetic ring 22 are opposite, and when the quasi-zero stiffness foot pad 100 is in use, the weight of the object to be isolated compresses the annular seat 11 and the conical section 12 to make the quasi-zero stiffness foot pad 100 reach the equilibrium point or the vicinity of the equilibrium point. Referring to Figure 7 , if the inner magnetic ring 21 is located above the outer magnetic ring 22 at this time, a magnetic repulsion force is formed between the inner magnetic ring 21 and the outer magnetic ring 22, and when the object to be isolated vibrates to produce axial displacement, the magnetic repulsion force between the inner magnetic ring 21 and the outer magnetic ring 22 and the elastic support force of the annular seat 11 and the conical section 12 support the object to be isolated to buffer the vibration of the object to be isolated, avoid excessive compression deformation of the conical section 12 and the annular seat 11, especially when the vibration amplitude is large, and have good vibration isolation effect; and under the combined action of the weight of the object to be isolated, the magnetic repulsion force between the inner magnetic ring 21 and the outer magnetic ring 22, and the elastic support force of the annular seat 11 and the conical section 12, the connecting column 13 will always be in the ideal equilibrium position with dynamic stiffness close to zero along the axial direction, and quasi-zero stiffness vibration reduction is achieved.

[0070] In one embodiment, referring to Figure 8 , the outer magnetic ring 22 is radially magnetized, that is, the outer magnetic ring 22 is radially magnetized from the center axis to the outside, that is, the polarity of the radially inner side of the outer magnetic ring 22 is opposite to the polarity of the radially outer side of the outer magnetic ring 22. The inner magnetic ring 21 is radially magnetized, that is, the inner magnetic ring 21 is radially magnetized from the center axis to the outside, that is, the polarity of the radially inner side of the inner magnetic ring 21 is opposite to the polarity of the radially outer side of the inner magnetic ring 21. The inner magnetic ring 21 and the outer magnetic ring 22 are magnetized in the same direction, that is, the inner magnetic ring 21 and the outer magnetic ring 22 are both radially magnetized from the center axis to the outside, or the inner magnetic ring 21 and the outer magnetic ring 22 are both magnetized from the outside to the inside. That is, when the radially inner side or inner periphery of the inner magnetic ring 21 is N-pole and the radially outer side or outer periphery of the inner magnetic ring 21 is S-pole, the radially inner side or inner periphery of the outer magnetic ring 22 is N-pole and the radially outer side or outer periphery of the outer magnetic ring 22 is S-pole; or when the radially inner side or inner periphery of the inner magnetic ring 21 is S-pole and the radially outer side or outer periphery of the inner magnetic ring 21 is N-pole, the radially inner side or inner periphery of the outer magnetic ring 22 is S-pole and the radially outer side or outer periphery of the outer magnetic ring 22 is N-pole.

[0071] In one embodiment, referring to Figure 8 , the inner magnetic ring 21 and the outer magnetic ring 22 are radially magnetized in the same direction, so that the inner magnetic ring 21 and the outer magnetic ring 22 are attracted to each other under the action of the magnetic field generated by each other. The balance point of the quasi-zero stiffness foot pad 100 can be set at a position where the axial middle surface of the inner magnetic ring 21 is located near the axial middle surface of the outer magnetic ring 22, or the axial middle surface of the inner magnetic ring 21 coincides with the axial middle surface of the outer magnetic ring 22, that is, the axial middle surface of the inner magnetic ring 21 is adjacent to the axial middle surface of the outer magnetic ring 22. In this way, when the quasi-zero stiffness foot pad 100 is in use, when statically supporting the object to be isolated, the weight of the object to be isolated compresses the annular seat 11 and the conical section 12, so that the quasi-zero stiffness foot pad 100 reaches the balance point or reaches the vicinity of the balance point. Since the axial middle surface of the inner magnetic ring 21 is located near the axial middle surface of the outer magnetic ring 22 or the axial middle surface of the inner magnetic ring 21 coincides with the axial middle surface of the outer magnetic ring 22 at this time, a magnetic attraction force is formed between the inner magnetic ring 21 and the outer magnetic ring 22. When the object to be isolated vibrates to produce axial displacement, the magnetic attraction force between the inner magnetic ring 21 and the outer magnetic ring 22 and the elastic support force of the annular seat 11 and the conical section 12 can make the axial middle surface of the inner magnetic ring 21 be located near the axial middle surface of the outer magnetic ring 22, that is, the inner magnetic ring 21 and the shaft core are always in the ideal balanced position with the axial dynamic stiffness close to zero, so that the quasi-zero stiffness vibration reduction is realized.

[0072] The "adjacent" above means that the axial middle surface of the inner magnetic ring 21 coincides with the axial middle surface of the outer magnetic ring 22, and the axial middle surface of the inner magnetic ring 21 is close to the axial middle surface of the outer magnetic ring 22, that is, the axial middle surface of the inner magnetic ring 21 coincides with the axial middle surface of the outer magnetic ring 22 as an ideal state, but a certain error or deviation is allowed, for example, the error or deviation distance is less than 15% of the maximum axial amplitude of the object to be isolated, and of course, in some high-precision occasions, the error or deviation distance is less than 10% or 5% of the maximum axial amplitude of the object to be isolated.

[0073] In one embodiment, referring to Figure 9 , the radiation magnetization directions of the inner magnetic ring 21 and the outer magnetic ring 22 are opposite, that is, when the inner magnetic ring 21 is radially magnetized from the center to the outside, the outer magnetic ring 22 is magnetized from the outside to the inside; and when the outer magnetic ring 22 is radially magnetized from the center to the outside, the inner magnetic ring 21 is magnetized from the outside to the inside. That is, when the radial inner side or inner periphery of the inner magnetic ring 21 is N-pole and the radial outer side or outer periphery of the inner magnetic ring 21 is S-pole, the radial inner side or inner periphery of the outer magnetic ring 22 is S-pole and the radial outer side or outer periphery of the outer magnetic ring 22 is N-pole; or when the radial inner side or inner periphery of the inner magnetic ring 21 is S-pole and the radial outer side or outer periphery of the inner magnetic ring 21 is N-pole, the radial inner side or inner periphery of the outer magnetic ring 22 is N-pole and the radial outer side or outer periphery of the outer magnetic ring 22 is S-pole. In this way, the inner magnetic ring 21 and the outer magnetic ring 22 repel each other under the action of the magnetic field generated by each other.

[0074] In one embodiment, referring to Figure 9 , the radiation magnetization directions of the inner magnetic ring 21 and the outer magnetic ring 22 are opposite, so that the magnetic repulsion is generated between the inner magnetic ring 21 and the outer magnetic ring 22. The balance point of the quasi-zero stiffness foot pad 100 can be set above the inner magnetic ring 21 of the outer magnetic ring 22. In this way, when the quasi-zero stiffness foot pad 100 is in use, the weight of the object to be isolated compresses the annular seat 11 and the conical section 12 when the object to be isolated is statically supported, so that the quasi-zero stiffness foot pad 100 reaches the balance point or the vicinity of the balance point. Since the inner magnetic ring 21 is above the outer magnetic ring 22 at this time, the magnetic repulsion is formed between the inner magnetic ring 21 and the outer magnetic ring 22, and when the object to be isolated vibrates to generate axial displacement, the magnetic repulsion between the inner magnetic ring 21 and the outer magnetic ring 22 and the elastic support force of the annular seat 11 and the conical section 12 support the object to be isolated to buffer the vibration of the object to be isolated, so as to avoid excessive compression deformation of the conical section 12 and the annular seat 11, especially when the vibration amplitude is large, and the quasi-zero stiffness damping effect is good; and under the combined action of the weight of the object to be isolated, the magnetic repulsion between the inner magnetic ring 21 and the outer magnetic ring 22, and the elastic support force of the annular seat 11 and the conical section 12, the connecting column 13 is always in the ideal balanced position with the dynamic stiffness close to zero along the axial direction, so as to realize the quasi-zero stiffness damping.

[0075] In one embodiment, referring to Figure 10, the middle part of the annular seat 11 is located at the flared end 121 of the conical section 12, that is, the upper end of the annular seat 11 has a convex ring part 112 protruding upward of the conical section 12, so that when the to-be-vibration-isolated object produces a larger amplitude vibration, the conical section 12 produces a larger downward deformation, the upper end of the annular seat 11 can support the leg 31 of the to-be-vibration-isolated object, and the convex ring part 112 on the annular seat 11 can also play a buffering role to better reduce vibration and avoid crushing the rubber foot pad 10 and improve the vibration reduction effect.

[0076] The quasi-zero stiffness foot pad 100 of the embodiment of the present application can achieve quasi-zero stiffness vibration reduction, can ensure that the quasi-zero stiffness foot pad 100 has good vibration reduction effect on low-frequency and high-frequency vibrations, and can ensure good vibration reduction effect of the quasi-zero stiffness foot pad 100.

[0077] The embodiment of the present application also provides a compressor including a body and the quasi-zero stiffness foot pad 100 as described in any of the above embodiments, the body is provided with a leg 31 connected with the connecting column 13 of the quasi-zero stiffness foot pad 100. The compressor uses the quasi-zero stiffness foot pad 100 of the above embodiment, has the technical effects of the quasi-zero stiffness foot pad 100, has good vibration isolation effect at low frequency, and can also achieve good vibration reduction and noise reduction at high-frequency and severe vibration of the compressor.

[0078] The compressor of the embodiment of the present application can be a rotary compressor, a reciprocating piston compressor, a scroll compressor, etc.

[0079] The embodiment of the present application also provides a refrigeration and heating equipment including the compressor as described in any of the above embodiments. The refrigeration and heating equipment uses the compressor of the above embodiment, has the technical effects of the compressor, and details are not repeated here.

[0080] The refrigeration and heating equipment of the embodiment of the present application can be a refrigeration-only equipment, such as a refrigerator, can be a heating-only equipment, or can be a refrigeration and heating equipment.

[0081] The above is only an optional embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A quasi-zero stiffness foot pad, comprising a rubber foot pad, characterized in that, The rubber foot pad includes a conical segment for providing nonlinear support force, an annular seat, and a connecting post for connecting the support leg of the object to be isolated. The constricted end of the conical segment is connected to the connecting post, and the flared end of the conical segment is connected to the annular seat. The end of the connecting post connected to the constricted end has a support portion extending into the conical segment. An inner magnetic ring is installed on the support portion, and an outer magnetic ring is provided on the annular seat for cooperating with the inner magnetic ring to generate a magnetic force. The inner magnetic ring and the outer magnetic ring are coaxially arranged.

2. The quasi-zero stiffness foot pad as described in claim 1, characterized in that: Both the inner magnetic ring and the outer magnetic ring are axially magnetized.

3. The quasi-zero stiffness foot pad as described in claim 2, characterized in that: The inner magnetic ring and the outer magnetic ring are magnetized in opposite directions.

4. The quasi-zero stiffness foot pad as described in claim 1, characterized in that: The inner magnetic ring is located above the outer magnetic ring when the rubber foot pad statically supports the object to be isolated. Both the inner and outer magnetic rings are radiatively magnetized, and the magnetization directions of the inner and outer magnetic rings are opposite.

5. The quasi-zero stiffness foot pad as described in claim 1, characterized in that: The axial mid-surface of the inner magnetic ring is adjacent to the axial mid-surface of the outer magnetic ring when the rubber foot pad statically supports the object to be isolated. Both the inner and outer magnetic rings are radiatively magnetized, and the magnetization directions of the inner and outer magnetic rings are the same.

6. The quasi-zero stiffness foot pad as described in any one of claims 1-5, characterized in that: The inner circumferential surface of the annular seat is provided with an inner annular groove, and the outer magnetic ring is installed in the inner annular groove.

7. The quasi-zero stiffness foot pad as described in any one of claims 1-5, characterized in that: The outer circumferential surface of the support is provided with an outer ring groove, and the inner magnetic ring is installed in the outer ring groove.

8. The quasi-zero stiffness foot pad as described in any one of claims 1-5, characterized in that: The flared end of the conical segment is connected to the upper end of the annular seat; or, the upper end of the annular seat has a protruding ring portion that protrudes from the conical segment.

9. The quasi-zero stiffness foot pad as described in any one of claims 1-5, characterized in that: The connecting post is provided with a through hole for inserting a sleeve, and the through hole is arranged to extend through the connecting post along the axial direction.

10. The quasi-zero stiffness foot pad as described in any one of claims 1-5, characterized in that: The top of the connecting column has a first annular groove on its periphery for the support leg of the object to be isolated to extend into and be positioned.

11. The quasi-zero stiffness foot pad as described in claim 10, characterized in that: The connecting column has a first protrusion on its periphery for positioning the upper surface of the support leg of the object to be isolated, and the first protrusion is located at the upper end of the first annular groove.

12. The quasi-zero stiffness foot pad as described in claim 10, characterized in that: The connecting column has a second protrusion on its periphery for supporting the foot of the object to be isolated, and the second protrusion is located at the lower end of the first annular groove.

13. The quasi-zero stiffness foot pad as described in claim 12, characterized in that: The connecting column is provided with a second annular groove on its periphery, and the second annular groove is located between the second boss and the conical segment.

14. A compressor, comprising a body, wherein the body is provided with support legs, characterized in that: The compressor further includes a near-zero stiffness foot pad as described in any one of claims 1-13, wherein the foot is connected to the connecting column.

15. A refrigeration and heating device, characterized in that: Includes the compressor as described in claim 14.

Images