A multi-stage wave spring assembly structure for compressor seal

Abstract

The utility model discloses a kind of multistage corrugated spring assembly structures of compressor seal, including compressor shell and gear box, the gear box is fixedly connected on compressor shell, two mounting holes are symmetrically opened on the compressor shell, two the shaft is arranged in the mounting hole, the shaft sleeve is fixedly sleeved on each the shaft, the O-shaped sealing ring is sleeved on each the shaft, the sealing ring is fixedly connected with each the O-shaped sealing ring, the utility model compressor drives the rotation of gear on the shaft, the contact surface of O-shaped sealing ring and sealing ring changes with pressure condition, primary wave spring and secondary wave spring first occur deformation, provide initial sealing force for the sealing of O-shaped sealing ring and sealing ring, if pressure further rises primary wave spring and secondary wave spring are compressed, will be absorbed by deformation Excess pressure, avoid O-shaped sealing ring and sealing ring move, cause sealing property to reduce.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and more specifically, to a multi-stage corrugated spring assembly structure for a compressor seal. Background Technology

[0002] During operation, the compressor's seals must withstand periodic alternating loads and complex thermo-mechanical coupling effects. In traditional sealing structures, single-stage corrugated springs are used for limiting and fixing.

[0003] Because the elastic modulus of a single-stage corrugated spring is fixed, it is difficult to adapt to the dynamic changes in contact stress at the sealing surface, which can easily lead to a decrease in sealing performance or premature fatigue fracture of the spring. In addition, the radius of curvature at the root of the corrugated spring is usually small. When this part comes into contact with the sealing structure, the small contact area and uneven stress distribution can easily cause local deformation, thereby affecting the accurate positioning and limiting effect of the spring on the sealing structure. Utility Model Content

[0004] This invention addresses the technical problems existing in the prior art by providing a multi-stage corrugated spring assembly structure for compressor seals. It solves the problem that the fixed elastic modulus of a single-stage corrugated spring makes it difficult to adapt to dynamic changes in the contact stress of the sealing surface, easily leading to decreased sealing performance or premature fatigue fracture of the spring. Furthermore, the radius of curvature at the root of the corrugated spring is typically small. When this part comes into contact with the sealing structure, the small contact area and uneven stress distribution easily cause local deformation, thus affecting the accurate positioning and limiting effect of the spring on the sealing structure.

[0005] To achieve the above objectives, this utility model provides a multi-stage corrugated spring assembly structure for compressor seals, including a compressor housing and a gearbox. The gearbox is fixedly connected to the compressor housing. Two mounting holes are symmetrically opened on the compressor housing. A rotating shaft is provided in each of the two mounting holes. A bushing is fixedly sleeved on each rotating shaft. An O-ring is sleeved on each rotating shaft. A sealing ring is fixedly connected to each O-ring. A corrugated spring assembly and a second corrugated spring assembly are provided in each sealing box.

[0006] Each of the corrugated spring assemblies includes a first wave spring and a second wave spring. Each first wave spring is symmetrically fixedly connected to two first annular fixing plates, and each second wave spring is symmetrically fixedly connected to two second annular fixing plates. The O-ring seal has a first annular groove and a second annular groove. The lower end of the first annular fixing plate and the second annular fixing plate abuts against the first annular groove and the second annular groove, respectively.

[0007] The beneficial effects of this utility model are:

[0008] 1. The compressor drives the gears on the shaft to rotate. The contact surface of the O-ring and the sealing ring changes with the pressure. Wave springs No. 1 and No. 2 deform first, providing the initial sealing force for the O-ring and the sealing ring. If the pressure increases further, wave springs No. 1 and No. 2 are compressed, and they will absorb the excess pressure through deformation, preventing the O-ring and the sealing ring from moving and reducing the sealing performance.

[0009] 2. By having the No. 1 and No. 2 annular fixing plates abut against the No. 1 and No. 2 annular grooves respectively, the root positions of the No. 1 and No. 2 wave springs can be prevented from directly contacting the O-ring seal, thereby increasing the contact area between the O-ring seal and the sealing ring of the No. 1 and No. 2 wave springs and improving the uniformity of force distribution.

[0010] Preferably, the first and second annular fixing plates in the same corrugated spring assembly are fixed by multiple connecting rods. The second annular fixing plate fixes the positions of the first and second wave springs relative to each other, and the wave crests and troughs of the first and second wave springs are staggered.

[0011] Preferably, a support ring is fixedly connected to the inner wall of each of the sealed boxes, and each of the O-rings abuts against the support ring.

[0012] Preferably, two sealing boxes are symmetrically fixedly connected to the compressor housing, and the first and second annular fixing plates at the upper end are both fixedly connected to the inner wall of the sealing box.

[0013] Preferably, two fixing rings are symmetrically fixedly connected to the inner wall of the compressor housing, and each bushing is fixedly connected to an annular abutment plate. Each fixing ring has a slot, and the annular abutment plate is installed in the slot.

[0014] Preferably, each of the rotating shafts is fixedly fitted with a mounting ring plate, through which the gear is mounted.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The compressor drives the gears on the shaft to rotate. The contact surface of the O-ring and sealing ring changes with the pressure. Wave springs No. 1 and No. 2 deform, providing the initial sealing force for the O-ring and sealing ring. If the pressure increases further, wave springs No. 1 and No. 2 are compressed, and the excess pressure is absorbed through deformation, preventing the O-ring and sealing ring from moving and reducing the sealing performance.

[0017] 2. By having the No. 1 and No. 2 annular fixing plates abut against the No. 1 and No. 2 annular grooves respectively, the root positions of the No. 1 and No. 2 wave springs can be prevented from directly contacting the O-ring seal, thereby increasing the contact area between the No. 1 and No. 2 wave springs and the O-ring seal and sealing ring, and improving the uniformity of force distribution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 In this utility model Figure 2 Enlarged view of point A;

[0021] Figure 4 This is a cross-sectional view of the O-ring and sealing ring in this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Compressor housing; 2. Gearbox; 3. Shaft; 301. Mounting ring plate; 4. Bushing; 5. O-ring seal; 501. Sealing ring; 601. Wave spring No. 1; 602. Wave spring No. 2; 603. Annular fixing plate No. 1; 604. Annular fixing plate No. 2; 605. Annular groove No. 1; 606. Annular groove No. 2; 607. Connecting rod; 7. Annular abutment plate; 8. Sealing box; 9. Fixing ring; 10. Support ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4This embodiment provides a multi-stage corrugated spring assembly structure for compressor seals, including a compressor housing 1 and a gearbox 2. The gearbox 2 is fixedly connected to the compressor housing 1. Two mounting holes are symmetrically opened on the compressor housing 1, and a rotating shaft 3 is provided in each of the two mounting holes. Considering that traditional compressor seals only use a single-stage corrugated spring for buffering, and that the contact point between the corrugated spring and the seal is small and the stress distribution is uneven, which can easily cause local deformation, a bushing 4 is fixedly sleeved on each rotating shaft 3, an O-ring seal 5 is sleeved on each rotating shaft 3, and a sealing ring 501 is fixedly connected to each O-ring seal 5. A corrugated spring assembly and a second corrugated spring assembly are provided in each sealing box 8.

[0026] Each corrugated spring assembly includes a first wave spring 601 and a second wave spring 602. Each first wave spring 601 is symmetrically fixedly connected to two first annular fixing plates 603, and each second wave spring 602 is symmetrically fixedly connected to two second annular fixing plates 604. The O-ring seal 5 has a first annular groove 605 and a second annular groove 606. The lower end first annular fixing plate 603 and second annular fixing plate 604 abut against the first annular groove 605 and the second annular groove 606, respectively.

[0027] In summary, the improvement of this embodiment lies in:

[0028] The compressor drives the gear on the rotating shaft 3 to rotate. The contact surface between the O-ring seal 5 and the sealing ring 501 changes with the pressure. Wave spring 601 and wave spring 602 deform first, providing the initial sealing force for the O-ring seal 5 and the sealing ring 501. If the pressure increases further, wave spring 601 and wave spring 602 are compressed, and the excess pressure is absorbed through deformation, preventing the O-ring seal 5 and the sealing ring 501 from moving and reducing the sealing performance. By having the first annular fixing plate 603 and the second annular fixing plate 604 abut against the first annular groove 605 and the second annular groove 606 respectively, the root positions of wave spring 601 and wave spring 602 can be prevented from directly contacting the O-ring seal 5, increasing the contact area between wave spring 601 and wave spring 602 and the O-ring seal 5 and the sealing ring 501, and improving the uniformity of force distribution.

[0029] Based on the above, other structures also need to be disclosed in detail, such as:

[0030] Please see Figure 3In order to stagger the peaks and troughs of the first wave spring 601 and the second wave spring 602, the first annular fixing plate 603 and the second annular fixing plate 604 in the same wave spring assembly are fixed by multiple connecting rods 607. The second annular fixing plate 604 fixes the positions of the first wave spring 601 and the second wave spring 602 relatively, and the peaks and troughs of the first wave spring 601 and the second wave spring 602 are staggered.

[0031] Please see Figure 2 In order to fix the position of the O-ring 5, 10 is fixedly connected to the inner wall of each sealing box 8, and each O-ring 5 abuts against 10, and the O-ring 5 is initially positioned by the support ring.

[0032] Please see Figure 2 Two sealing boxes 8 are symmetrically fixedly connected to the compressor housing 1. The first annular fixing plate 603 and the second annular fixing plate 604 at the upper end are both fixedly connected to the inner wall of the sealing box 8.

[0033] Please see Figure 2 In order to position the bushing 4, two fixing rings 9 are symmetrically fixedly connected to the inner wall of the compressor housing 1. Each bushing 4 is fixedly connected to an annular abutment 7. Each fixing ring 9 has a slot. The annular abutment 7 is installed in the slot. The bushing 4 is fixedly installed in the slot through the annular abutment 7.

[0034] Please see Figure 2 Each rotating shaft 3 is fixedly fitted with a mounting ring plate 301, through which the gear is installed.

[0035] In summary, the working principle of this solution is as follows:

[0036] When the compressor is working, the rotating shaft 3 drives the gear on the rotating shaft 3 to rotate. The contact surface of the O-ring seal 5 and the sealing ring 501 changes with the pressure. Wave spring 601 and wave spring 602 deform first, providing the initial sealing force for the O-ring seal 5 and the sealing ring 501. If the pressure increases further, wave spring 601 and wave spring 602 are compressed, and the excess pressure is absorbed through deformation, preventing the O-ring seal 5 and the sealing ring 501 from moving and reducing the sealing performance. The annular fixing plate 603 and the annular fixing plate 604 abut against the annular groove 605 and the annular groove 606 respectively, which can prevent the root of wave spring 601 and wave spring 602 from directly contacting the O-ring seal 5, increase the contact area between wave spring 601 and wave spring 602 and the O-ring seal 5 and the sealing ring 501, and improve the uniformity of force distribution.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage corrugated spring assembly structure for a compressor seal, comprising a compressor housing (1) and a gearbox (2), wherein the gearbox (2) is fixedly connected to the compressor housing (1), and two mounting holes are symmetrically provided on the compressor housing (1), and a rotating shaft (3) is provided in each of the two mounting holes, characterized in that: Each of the rotating shafts (3) is fixedly fitted with a bushing (4), each of the rotating shafts (3) is fitted with an O-ring seal (5), each of the O-ring seals (5) is fixedly connected with a sealing ring (501), and each of the sealing boxes (8) is provided with a corrugated spring assembly; Each of the wave spring assemblies includes a first wave spring (601) and a second wave spring (602). Each first wave spring (601) is symmetrically fixedly connected to two first annular fixing plates (603), and each second wave spring (602) is symmetrically fixedly connected to two second annular fixing plates (604). The O-ring seal (5) has a first annular abutment groove (605) and a second annular abutment groove (606). The lower end of the first annular fixing plate (603) and the second annular fixing plate (604) abuts against the first annular abutment groove (605) and the second annular abutment groove (606), respectively.

2. The multi-stage corrugated spring assembly structure for compressor seals according to claim 1, characterized in that: The first annular fixing plate (603) and the second annular fixing plate (604) in the same wave spring assembly are fixed by multiple connecting rods (607). The second annular fixing plate (604) fixes the positions of the first wave spring (601) and the second wave spring (602) relative to each other. The first wave spring (601) and the second wave spring (602) are arranged with alternating peaks and troughs.

3. The multi-stage corrugated spring assembly structure for compressor seals according to claim 1, characterized in that: Each of the sealed boxes (8) has a support ring (10) fixedly connected to its inner wall, and each of the O-rings (5) abuts against the support ring (10).

4. The multi-stage corrugated spring assembly structure for compressor seals according to claim 1, characterized in that: Two sealing boxes (8) are symmetrically fixedly connected to the compressor housing (1). The first annular fixing plate (603) and the second annular fixing plate (604) at the upper end are both fixedly connected to the inner wall of the sealing box (8).

5. The multi-stage corrugated spring assembly structure for compressor seals according to claim 1, characterized in that: Two fixing rings (9) are symmetrically fixedly connected to the inner wall of the compressor housing (1). Each bushing (4) is fixedly connected to an annular abutment plate (7). Each fixing ring (9) has a slot, and the annular abutment plate (7) is installed in the slot.

6. The multi-stage corrugated spring assembly structure for compressor seals according to claim 1, characterized in that: Each of the aforementioned shafts (3) is fixedly fitted with a mounting ring plate (301), through which the gear is mounted.

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