Permanent magnet variable frequency pump damping protection mechanism and protection method thereof

Abstract

The invention discloses a permanent magnet variable frequency pump damping protection mechanism and a protection method thereof, and relates to the technical field of pump body damping structures, the permanent magnet variable frequency pump damping protection mechanism comprises a pump main body, a plurality of pump supports are installed at the lower bottom of the pump main body, a plurality of damping protection pieces are installed below the pump supports, and the damping protection pieces comprise outer damping protection pieces and inner elastic pieces; the outer damping protection part is composed of an upper bag cavity, a lower bag cavity and a connecting cavity, the upper end and the lower end of the connecting cavity communicate with the upper bag cavity and the lower bag cavity correspondingly, a composite damping part is installed below the damping protection part, and a vibration isolation protection part is installed below the composite damping part. The outer walls of the upper bag cavity, the lower bag cavity and the connecting cavity are made of rubber, and the width of the upper bag cavity and the width of the lower bag cavity are larger than that of the connecting cavity. The problems that an existing pump damping structure depends on traditional springs and dampers, the absorption capacity for high-frequency vibration and tiny vibration is limited, and vibration is easily transmitted to a base and the ground are solved.

Description

Technical Field

[0001] This invention relates to the field of pump body vibration damping structure technology, specifically to a vibration damping protection mechanism and protection method for a permanent magnet variable frequency pump. Background Technology

[0002] The permanent magnet variable frequency pump is a high-efficiency and energy-saving water pump that combines a permanent magnet synchronous motor with frequency converter technology. It achieves precise control of flow rate and head through variable frequency speed regulation and features high efficiency, energy saving, low noise, and compact structure.

[0003] Announcement No.: CN220037351U, named a shock-absorbing device for a chilled water pump, including a pump body, a motor and a base. A first fixing block is fixedly connected to the lower part of the pump body, a second fixing block is fixedly connected to the lower part of the motor, a first base is fixedly connected to the lower part of the first fixing block, and a second base is fixedly connected to the lower part of the second fixing block. The bottom surfaces of the first base and the second base are both fixedly connected to the base. A plurality of first shock-absorbing mechanisms and a plurality of second shock-absorbing mechanisms are provided between the base and the ground.

[0004] Existing pump vibration damping structures rely on traditional springs and dampers, which have limited absorption capacity for high-frequency and micro-vibrations. This can easily lead to vibration transmission to the base and ground, causing structural loosening or noise. Furthermore, the damping springs are prone to rusting in outdoor environments, resulting in a short service life. Therefore, this paper provides a permanent magnet variable frequency pump vibration damping protection mechanism and its protection method. Summary of the Invention

[0005] The purpose of this invention is to provide a vibration damping protection mechanism and protection method for a permanent magnet variable frequency pump, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vibration damping and protection mechanism for a permanent magnet variable frequency pump, comprising a pump body, a plurality of pump supports installed at the bottom of the pump body, a plurality of vibration damping and protection components installed below the pump supports, the vibration damping and protection components comprising an outer vibration damping and protection component and an inner elastic component, the outer vibration damping and protection component comprising an upper bladder cavity, a lower bladder cavity and a connecting cavity, the upper and lower ends of the connecting cavity being connected to the upper bladder cavity and the lower bladder cavity respectively, a composite vibration damping component installed below the vibration damping and protection component, and a vibration isolation protection component installed below the composite vibration damping component.

[0007] Preferably, the outer walls of the upper bladder cavity, lower bladder cavity, and connecting cavity are made of rubber, the width of the upper bladder cavity and lower bladder cavity is greater than that of the connecting cavity, and the shape of the upper bladder cavity and lower bladder cavity is elliptical.

[0008] Preferably, the internal elastic element includes a spring, and the upper and lower ends of the spring are respectively provided with an upper assembly piece and a lower assembly piece.

[0009] Preferably, the upper and lower ends of the outer shock absorber are respectively provided with a first layered rubber block and a second layered rubber block. The first layered rubber block and the second layered rubber block are respectively located at the upper and lower ends of the inner elastic member, and the first layered rubber block and the second layered rubber block are respectively assembled with the upper assembly piece and the lower assembly piece by bolts.

[0010] Preferably, an upper mounting seat is provided above the upper bladder cavity, and an assembly hole is provided on the outer wall of the upper mounting seat, and a lower mounting seat is provided below the lower bladder cavity.

[0011] Preferably, the composite shock absorber includes an assembly plate frame, both sides of which are integrally provided with a first arc-shaped outer edge, a support plate frame is provided below the assembly plate frame, both sides of which are integrally provided with a second arc-shaped outer edge, and a rubber shock absorber block is filled between the first arc-shaped outer edge and the second arc-shaped outer edge.

[0012] Preferably, the outer wall of the rubber shock absorber has several through holes, and the inside of the through holes is filled with polyurethane elastomer.

[0013] Preferably, the vibration isolation protection component includes a base plate, and a high-damping rubber pad is adhered to the underside of the base plate.

[0014] Preferably, a combination bolt is installed between the pump support and the shock-absorbing protective component. The combination bolt includes a screw rod, the lower end of which extends into the outer shock-absorbing protective component. A nut is installed on the outer wall of the screw rod, and a shock-absorbing washer is provided below the nut.

[0015] Preferably, a protection method for a vibration damping protection mechanism of a permanent magnet variable frequency pump includes the following steps: Step 1: Connect the upper and lower assembly pieces of the inner elastic element to the first and second laminated rubber blocks using bolts. Fit the outer shock-absorbing protective component onto the outside of the inner elastic element. Align the shock-absorbing protective component with the pump support via the upper assembly seat and fix it by passing the screw of the combination bolt through the assembly hole. Step 2: Align and fix the assembly plate frame of the composite damping component with the lower assembly seat of the damping protection component; Step 3: Connect the base plate of the vibration isolation protection component to the support plate frame of the composite damping component, and fix the base plate to the foundation using anchor bolts or other fixing methods; Step 4: During protection, the vibration at the pump body is transmitted to the shock-absorbing protection component through the pump support. The upper bladder cavity, connecting cavity and lower bladder cavity of the outer shock-absorbing protection component are compressed downward in sequence to reduce the vibration. The internal vibration causes the spring to compress downward, squeezing the second layer of rubber block at the bottom to weaken the vibration force. Step 5: The weakened vibration at the shock-absorbing protection component is transmitted to the composite shock-absorbing component, and the rubber shock-absorbing block between the assembly plate frame and the support plate frame further weakens the transmitted vibration force. Step Six: The vibration isolation protection components use a combination of a base plate and a high-damping rubber pad to isolate and reduce vibrations on the ground.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention forms a vibration damping protection mechanism by setting up a three-level vibration damping system, namely vibration damping protection component, composite vibration damping component and vibration isolation protection component, which gradually attenuates vibration. The outer cavity structure and inner elastic component in the vibration damping protection component are used to initially absorb and disperse vibration energy; the composite vibration damping component further weakens the low and medium frequency vibration through the arc-shaped outer edge and the rubber block filled with polyurethane; the vibration isolation protection component blocks the vibration transmitted from the ground through the high damping rubber pad. This layered multi-level vibration damping mechanism not only significantly reduces the vibration transmission during pump operation, but also improves the stability and smooth operation of the entire pump system, and is suitable for precision or high-frequency operating environments with high vibration control requirements.

[0017] (2) The bladder adopts an elliptical design, which increases the deformation space and improves the fatigue life; the spring and the laminated rubber block are fixed by assembly plates and bolts to ensure that the elastic element does not shift or fail under long-term vibration; the through holes in the composite damping component are filled with polyurethane elastomer, which enhances the damping performance and extends the service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the external shock-absorbing protective component and the vibration isolation protective component of the present invention; Figure 3 This is a cross-sectional view of the external shock-absorbing protective component of the present invention; Figure 4 This is a schematic diagram of the internal elastic element structure of the present invention; Figure 5 This is a schematic diagram of the composite shock absorber structure of the present invention; Figure 6 This is a schematic diagram of the rubber shock absorber block structure of the present invention; In the diagram: 1. Pump body; 101. Pump support; 2. Vibration damping protection component; 201. External vibration damping protection component; 2011. Upper bladder cavity; 2012. Connecting cavity; 2013. Lower bladder cavity; 2014. Upper mounting base; 2015. Lower mounting base; 2016. Assembly hole; 202. Internal elastic component; 2021. Spring; 2022. Upper mounting piece; 2023. Lower mounting piece; 203. First laminated rubber block; 20 4. Second layer of rubber block; 3. Composite damping component; 301. Assembly plate frame; 3011. First arc-shaped outer edge; 302. Support plate frame; 3021. Second arc-shaped outer edge; 303. Rubber damping block; 3031. Through hole; 3032. Polyurethane elastomer; 4. Vibration isolation protection component; 401. Base plate; 402. High damping rubber pad; 5. Combination bolt; 501. Screw; 502. Nut; 503. Damping pad. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figure 1-6 This invention provides an embodiment of a permanent magnet variable frequency pump vibration damping protection mechanism, comprising a pump body 1, a plurality of pump supports 101 installed at the bottom of the pump body 1, and a plurality of vibration damping protection components 2 installed below the pump supports 101. The vibration damping protection component 2 includes an outer vibration damping protection component 201 and an inner elastic component 202. The outer vibration damping protection component 201 is composed of an upper bladder cavity 2011, a lower bladder cavity 2013, and a connecting cavity 2012. The upper and lower ends of the connecting cavity 2012 are respectively connected to the upper bladder cavity 2011 and the lower bladder cavity 2013. A composite vibration damping component 3 is installed below the vibration damping protection component 2, and a vibration isolation protection component 4 is installed below the composite vibration damping component 3. The pump body 1 is connected to the vibration damping protection component 2 through the pump supports 101. The composite vibration damping component 3 and the vibration isolation protection component 4 are arranged sequentially below to form a three-level vibration damping structure. This layered design can absorb and disperse vibration energy step by step, avoid vibration from being directly transmitted to the foundation, and significantly improve the overall vibration damping effect.

[0021] Please see Figure 2 The outer walls of the upper bladder cavity 2011, the lower bladder cavity 2013, and the connecting cavity 2012 are made of rubber. The width of the upper bladder cavity 2011 and the lower bladder cavity 2013 is greater than that of the connecting cavity 2012, and the upper bladder cavity 2011 and the lower bladder cavity 2013 are elliptical in shape. The upper bladder cavity 2011, the lower bladder cavity 2013, and the connecting cavity 2012 are all made of rubber, which has good elasticity and fatigue resistance. The bladder structure can deform when subjected to vibration, further dissipating vibration energy and achieving preliminary shock absorption.

[0022] Please see Figure 3 , Figure 4 The inner elastic element 202 includes a spring 2021. The upper and lower ends of the spring 2021 are respectively provided with an upper mounting plate 2022 and a lower mounting plate 2023. The upper and lower ends of the inner shock-absorbing protective element 201 are respectively provided with a first stacked rubber block 203 and a second stacked rubber block 204. The first stacked rubber block 203 and the second stacked rubber block 204 are respectively located at the upper and lower ends of the inner elastic element 202, and the first stacked rubber block 203 and the second stacked rubber block 204 are respectively assembled with the upper mounting plate 2022 and the lower mounting plate 2023 by bolts.

[0023] In the above scheme, the spring 2021, as the core elastic element, can quickly respond to vibration and undergo compression and rebound, effectively absorbing high-frequency vibration. The upper assembly piece 2022 and the lower assembly piece 2023 provide a stable connection interface, ensuring that the spring 2021 will not shift during reciprocating motion, thus extending its service life. The first laminated rubber block 203 and the second laminated rubber block 204 are located at the upper and lower ends of the spring 2021, respectively, and are fixed to the assembly piece by bolts. The laminated rubber has high damping characteristics, which can provide additional resistance when the spring 2021 is compressed, further consuming vibration energy and preventing resonance.

[0024] Please see Figure 3 , Figure 4 An upper mounting base 2014 is provided above the upper bladder cavity 2011, and an assembly hole 2016 is provided on the outer wall of the upper mounting base 2014. A lower mounting base 2015 is provided below the lower bladder cavity 2013. The upper mounting base 2014 and the lower mounting base 2015 are located at the upper and lower ends of the bladder cavity, respectively, and are provided with assembly holes 2016, which facilitates connection with the pump support 101 and the composite shock absorber 3 by means of combination bolts 5. This design not only facilitates installation, but also ensures the alignment between the components and avoids the impact of installation deviation on the shock absorption effect.

[0025] Please see Figure 5 , Figure 6 The composite damping component 3 includes an assembly plate frame 301. Both sides of the assembly plate frame 301 are integrally provided with a first arc-shaped outer edge 3011. A support plate frame 302 is provided below the assembly plate frame 301. Both sides of the support plate frame 302 are integrally provided with a second arc-shaped outer edge 3021. A rubber damping block 303 is filled between the first arc-shaped outer edge 3011 and the second arc-shaped outer edge 3021. Several through holes 3031 are opened on the outer wall of the rubber damping block 303. The interior of the through holes 3031 is filled with polyurethane elastomer 3032.

[0026] In the above structure, a cavity is formed between the assembly plate frame 301 and the support plate frame 302 through the first arc-shaped outer edge 3011 and the second arc-shaped outer edge 3021. The cavity is filled with rubber damping blocks 303. The arc-shaped structure increases the deformation space, and the rubber damping blocks 303 further absorb vibration through their own elasticity, especially having a good suppression effect on low and medium frequency vibrations. Polyurethane elastomer 3032 can also be selectively filled in the through hole 3031. When not filled, the through hole 3031 structure can increase the deformation capacity of the rubber damping blocks 303. After filling, the damping performance and durability of the material are further improved, so that it can maintain stable damping performance under long-term vibration environment.

[0027] Please see Figure 2 The vibration isolation protection component 4 includes a base plate 401, and a high-damping rubber pad 402 is bonded to the bottom of the base plate 401. The high-damping rubber pad 402 bonded to the bottom of the base plate 401 has extremely high energy dissipation capacity, which can effectively block the vibration transmitted from the ground and prevent it from being transmitted upward to the pump body. At the same time, it can also suppress the vibration of the pump body from spreading to the surrounding environment.

[0028] Please see Figure 1 A combination bolt 5 is installed between the pump support 101 and the vibration damping protection component 2. The combination bolt 5 includes a screw 501, the lower end of which extends into the outer vibration damping protection component 201. A nut 502 is installed on the outer wall of the screw 501, and a vibration damping washer 503 is provided below the nut 502. The screw 501 extends into the outer vibration damping protection component 201 and works in conjunction with the nut 502 and the vibration damping washer 503. This ensures the firmness of the connection and avoids vibration transmission caused by direct metal contact through the elastic deformation of the vibration damping washer 503, thereby improving the vibration isolation performance of the overall system.

[0029] Please see Figure 1-6 A protection method for a vibration damping protection mechanism of a permanent magnet variable frequency pump includes the following steps: Step 1: Connect the upper assembly piece 2022 and lower assembly piece 2023 of the inner elastic element 202 to the first laminated rubber block 203 and the second laminated rubber block 204 together with bolts. Fit the outer shock-absorbing protective element 201 on the outside of the inner elastic element 202. Align the shock-absorbing protective element 2 with the pump support 101 through the upper assembly seat 2014. Fix it by passing the screw 501 of the combination bolt 5 through the assembly hole 2016. Step 2: Align and fix the assembly plate frame 301 of the composite damping component 3 with the lower assembly seat 2015 of the damping protection component 2; Step 3: Connect the base plate 401 of the vibration isolation protection component 4 to the support plate frame 302 of the composite damping component 3, and fix the base plate 401 to the foundation using anchor bolts or other fixing methods; Step 4: During protection, the vibration at the pump body 1 is transmitted to the shock-absorbing protection component 2 through the pump support 101. The upper bladder cavity 2011, the connecting cavity 2012 and the lower bladder cavity 2013 of the outer shock-absorbing protection component 201 are compressed downward in sequence to reduce the vibration. The internal vibration causes the spring 2021 to be compressed downward, squeezing the second stacked rubber block 204 at the bottom to weaken the vibration force. Step 5: The vibration weakened at the shock-absorbing protection component 2 is transmitted to the composite shock absorber 3, and the rubber shock absorber block 303 between the assembly plate frame 301 and the support plate frame 302 further weakens the transmitted vibration force. Step Six: The vibration isolation and protection components at 4 locations, through the combination of the base plate 401 and the high-damping rubber pad 402, isolate and reduce vibrations on the ground.

[0030] By installing, aligning, and securing the components step by step, each layer of vibration damping element is ensured to function effectively. Vibration is transmitted from the pump body 1 to the vibration damping protection component 2, and then gradually weakened by the composite vibration damping component 3 and the vibration isolation protection component 4, ultimately achieving efficient vibration damping and isolation, suitable for the installation environment of various permanent magnet variable frequency pumps.

[0031] The main purpose of this invention is to improve the impact of bottom vibration by setting a bottom shock absorption structure for the pump body. For the side shock absorption requirements of the pump body, corresponding mature shock absorbers can be added to achieve side shock absorption, which will not be elaborated further.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vibration damping and protection mechanism for a permanent magnet variable frequency pump, comprising a pump body (1), wherein a plurality of pump supports (101) are installed at the lower bottom of the pump body (1), characterized in that: Multiple shock-absorbing protective components (2) are installed below the pump support (101). The shock-absorbing protective component (2) includes an outer shock-absorbing protective component (201) and an inner elastic component (202). The outer shock-absorbing protective component (201) is composed of an upper bladder cavity (2011), a lower bladder cavity (2013), and a connecting cavity (2012). The upper and lower ends of the connecting cavity (2012) are respectively connected to the upper bladder cavity (2011) and the lower bladder cavity (2013). A composite shock-absorbing component (3) is installed below the shock-absorbing protective component (2). A vibration isolation protective component (4) is installed below the composite shock-absorbing component (3).

2. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 1, characterized in that: The outer walls of the upper bladder cavity (2011), lower bladder cavity (2013) and connecting cavity (2012) are made of rubber. The width of the upper bladder cavity (2011) and lower bladder cavity (2013) is greater than that of the connecting cavity (2012), and the upper bladder cavity (2011) and lower bladder cavity (2013) are elliptical in shape.

3. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 2, characterized in that: The internal elastic element (202) includes a spring (2021), and the upper and lower ends of the spring (2021) are respectively provided with an upper assembly piece (2022) and a lower assembly piece (2023).

4. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 3, characterized in that: The upper and lower ends of the external shock absorber (201) are respectively provided with a first stacked rubber block (203) and a second stacked rubber block (204). The first stacked rubber block (203) and the second stacked rubber block (204) are respectively located at the upper and lower ends of the inner elastic member (202), and the first stacked rubber block (203) and the second stacked rubber block (204) are respectively assembled with the upper assembly piece (2022) and the lower assembly piece (2023) by bolts.

5. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 4, characterized in that: An upper mounting base (2014) is provided above the upper bladder cavity (2011), and an assembly hole (2016) is provided on the outer wall of the upper mounting base (2014). A lower mounting base (2015) is provided below the lower bladder cavity (2013).

6. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 5, characterized in that: The composite damping component (3) includes an assembly plate frame (301), on both sides of the assembly plate frame (301) are integrally provided with a first arc-shaped outer edge (3011), and a support plate frame (302) is provided below the assembly plate frame (301). On both sides of the support plate frame (302) are integrally provided with a second arc-shaped outer edge (3021), and a rubber damping block (303) is filled between the first arc-shaped outer edge (3011) and the second arc-shaped outer edge (3021).

7. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 6, characterized in that: The outer wall of the rubber damping block (303) is provided with several through holes (3031), and the interior of the through holes (3031) is filled with polyurethane elastomer (3032).

8. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 7, characterized in that: The vibration isolation protection component (4) includes a base plate (401), and a high-damping rubber pad (402) is bonded to the bottom of the base plate (401).

9. The vibration damping and protection mechanism for a permanent magnet variable frequency pump according to claim 8, characterized in that: A combination bolt (5) is installed between the pump support (101) and the shock absorber (2). The combination bolt (5) includes a screw (501). The lower end of the screw (501) extends into the outer shock absorber (201). A nut (502) is installed on the outer wall of the screw (501). A shock absorber pad (503) is provided below the nut (502).

10. A protection method for a vibration damping protection mechanism of a permanent magnet variable frequency pump, implemented based on the vibration damping protection mechanism of a permanent magnet variable frequency pump as described in claim 9, characterized in that, Includes the following steps: Step 1: Connect the upper assembly piece (2022) and lower assembly piece (2023) of the inner elastic element (202) to the first laminated rubber block (203) and the second laminated rubber block (204) together with bolts. Fit the outer shock absorber (201) onto the outside of the inner elastic element (202). Align the shock absorber (2) with the pump support (101) through the upper assembly seat (2014). Fix it by passing the screw (501) of the combination bolt (5) through the assembly hole (2016). Step 2: Align and fix the assembly plate frame (301) of the composite damping component (3) with the lower assembly seat (2015) of the damping protection component (2); Step 3: Connect the base plate (401) of the vibration isolation protection component (4) to the support plate frame (302) of the composite damping component (3), and fix the base plate (401) to the foundation using anchor bolts or other fixing methods; Step 4: During protection, the vibration at the pump body (1) is transmitted to the shock-absorbing protection component (2) through the pump support (101). The upper bladder cavity (2011), connecting cavity (2012) and lower bladder cavity (2013) of the outer shock-absorbing protection component (201) are compressed downward in sequence to reduce the vibration. The internal vibration affects the spring (2021) to compress downward and squeeze the second stacked rubber block (204) at the bottom to weaken the vibration force. Step 5: The weakened vibration at the shock absorber (2) is transmitted to the composite shock absorber (3), and the rubber shock absorber (303) between the mounting plate frame (301) and the support plate frame (302) further weakens the transmitted vibration force; Step 6: The vibration isolation protection component (4) uses a combination of a base plate (401) and a high-damping rubber pad (402) to isolate and reduce vibrations on the ground.

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