Rotating trunnion for high-pressure metering pump

Abstract

The utility model relates to the technical field of rotating trunnions for high-pressure pumps, and discloses a rotating trunnion for a high-pressure metering pump, which comprises a shell and a swinging body arranged in the shell, the front section of the pendulum body penetrates through the shell and extends to the front of the shell, and end covers are symmetrically arranged at the upper and lower ends of the shell corresponding to the inner section of the pendulum body; the ends, close to each other, of the two end covers penetrate through the outer side face of the shell, extend into the shell and make contact with the surface of the swing body, through holes are formed in the end covers in an up-down penetrating mode, bushings are vertically arranged in the through holes, two circles of mounting ring grooves are sequentially, evenly and horizontally formed in the outer sides of the bushings from top to bottom, and bushing seals are horizontally arranged in the mounting ring grooves. By optimizing an original trunnion sealing ring into four parts and changing the four parts into double-channel soft sealing, the problems of up-down movement and clamping stagnation can be solved while pressure can be borne, the operation failure rate is greatly reduced, and the production cost is further controlled by optimizing the structure and reducing the required machining parts.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating trunnions for high-pressure pumps, and particularly to a rotating trunnion for a high-pressure metering pump. Background Technique

[0002] A high-pressure pump is a device that provides high-pressure power for high-pressure polyurethane foaming, and is used in the polyurethane soft foam production lines of two-component, multi-component, etc. furniture and automotive parts; it can also be used in continuous foaming production lines such as building exterior walls, cold storage insulation boards, large sponges, and polyurethane rigid foam production lines such as water heaters and refrigerators.

[0003] A trunnion refers to a spindle installed on a support when the swing body of a high-pressure pump rotates or tilts during variable displacement, and at the same time, a high-pressure fluid medium passes through the center of the trunnion at high speed. Therefore, the trunnion of a high-pressure pump is one of the important parts for supporting the operation of the high-pressure pump.

[0004] The original trunnion seal ring adopted an upper and lower two-sealing-ring + spring structure, with a total of 6 components. Once the spring structure is worn or loosened, it will cause the medium passing through the high-pressure port to leak, generate high temperature, and even lose pressure.

[0005] The originally used steel piston ring is similar to that of an automobile, with a steel structure and an opening. It is prone to breakage due to long-term vibration, resulting in leakage and non-sealing of high-pressure media;

[0006] The piston ring has a tension value and is prone to expand outward due to long-term vibration, which will also cause wear to the pump body. The sealing ring will jam the spring and prevent it from resetting. If the pump continues to operate and is subjected to excessive force, the piston ring will be broken.

[0007] Therefore, a rotating trunnion for a high-pressure metering pump is proposed. Content of the Utility Model

[0008] The purpose of the utility model is to provide a rotating trunnion for a high-pressure metering pump to solve the problems raised in the above background technique.

[0009] To achieve the above purpose, the utility model provides the following technical solution: A rotating trunnion for a high-pressure metering pump, including a housing;

[0010] And a swing body arranged inside the housing;

[0011] The front section of the swing body penetrates through the housing and extends to the front of the housing. End caps are symmetrically arranged at the upper and lower ends of the housing corresponding to the inner section of the swing body;

[0012] Both ends of the two end caps extend through the outer side of the housing to the inside of the housing and contact the surface of the swing body. Through holes are vertically formed through the upper and lower parts of the end caps, and bushings are vertically arranged inside the through holes. Two circles of mounting ring grooves are horizontally and evenly arranged on the outer side of the bushings from top to bottom, and bushing seals are horizontally arranged inside the mounting ring grooves.

[0013] Preferably, screws are evenly arranged on the outer side of the end cap along the end cap direction. The screws penetrate through the end cap and extend to the inside of the housing, and the surface of the screws is threadedly connected to the inner wall of the housing.

[0014] Preferably, a sealing ring groove is horizontally formed on the side surface of the end cap, and a sealing ring is horizontally arranged inside the sealing ring groove. The outer side surface of the sealing ring is in sealed extrusion contact with the inner wall of the housing, and the inner side surface of the sealing ring is in sealed extrusion contact with the inner wall of the sealing ring groove.

[0015] Preferably, the outer side surface of the bushing seal is in sealed rotational connection with the inner wall of the through hole, and the inner side surface of the bushing seal is in sealed extrusion contact with the inner wall of the mounting ring groove.

[0016] Preferably, a snap ring groove is horizontally formed on the inner wall of the through hole above the bushing, and a snap ring is horizontally arranged inside the snap ring groove. The bottom end surface of the snap ring is in snap connection contact with the top end surface of the bushing.

[0017] Preferably, a swing body bearing is sleeved on the outer side of the inner end of the end cap, and the swing body bearing is embedded on the surface of the inner end of the swing body.

[0018] Preferably, the swing body bearing is a sealed bearing. The outer side surface of the swing body bearing is fixedly connected to the inner wall of the swing body, and the inner side surface of the swing body bearing is fixedly connected to the surface of the inner end of the end cap.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: for the rotating trunnion of the high-pressure metering pump,

[0020] 1. By optimizing the original trunnion sealing ring from 4 components to a double-channel soft seal, it can withstand pressure while solving the problem of vertical movement, greatly reducing the operation failure rate;

[0021] 2. Through structural optimization, the number of processing parts required is reduced, further controlling the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front three-dimensional schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 is a top three-dimensional schematic diagram of the overall structure of the present utility model;

[0024] Figure 3 is a front structural sectional view of the overall structure of the present utility model;

[0025] Figure 4 For the present utility model Figure 3 Enlarged view of area A in

[0026] Figure 5 Partial structural schematic diagram of the present utility model.

[0027] In the figure: bushing 1, bushing seal 2, installation ring groove 3, sealing ring groove 4, retaining ring 5, end cover 6, housing 7, pendulum body 8, pendulum body bearing 9, screw 10, sealing ring 11. Specific implementation mode

[0028] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0029] Embodiment 1:

[0030] Please refer to Figures 1-5 , the present utility model provides a technical solution: a rotating trunnion for a high-pressure metering pump, including a housing 7;

[0031] And a pendulum body 8 arranged inside the housing 7;

[0032] The front section of the pendulum body 8 penetrates through the housing 7 and extends to the front of the housing 7. End covers 6 are symmetrically arranged at the upper and lower ends of the housing 7 corresponding to the inner section positions of the pendulum body 8;

[0033] Screws 10 are evenly arranged along the outer side of the end cover 6 towards the end cover 6. The screws 10 penetrate through the end cover 6 and extend into the housing 7. The surface of the screw 10 is threadedly connected to the inner wall of the housing 7. Two circles of sealing ring grooves 4 are horizontally opened on the side surface of the end cover 6. A sealing ring 11 is horizontally arranged inside the sealing ring groove 4. The outer side surface of the sealing ring 11 is in sealing and pressing contact with the inner wall of the housing 7, and the inner side surface of the sealing ring 11 is in sealing and pressing contact with the inner wall of the sealing ring groove 4;

[0034] Both ends of the two end covers 6 close to each other penetrate through the outer side surface of the housing 7 and extend into the housing 7 to contact the surface of the pendulum body 8. Through holes are vertically opened through the upper and lower parts of the end cover 6. A bushing 1 is vertically arranged inside the through holes. Installation ring grooves 3 are evenly horizontally opened on the outer side of the bushing 1 from top to bottom. Bushing seals 2 are horizontally arranged inside the installation ring grooves 3;

[0035] The outer side surface of the bushing seal 2 is in sealing and rotational connection with the inner wall of the through hole. The inner side surface of the bushing seal 2 is in sealing and pressing contact with the inner wall of the installation ring groove 3. A retaining ring groove is horizontally opened on the inner wall of the through hole above the bushing 1. A retaining ring 5 is horizontally arranged inside the retaining ring groove. The bottom end surface of the retaining ring 5 is in snap contact with the top end surface of the bushing 1;

[0036] A swing body bearing 9 is sleeved on the outer side of the inner end of the end cover 6. The swing body bearing 9 is embedded in the inner end surface of the swing body 8. The swing body bearing 9 is a sealed bearing. The outer side surface of the swing body bearing 9 is fixedly connected to the inner wall of the swing body 8, and the inner side surface of the swing body bearing 9 is fixedly connected to the inner end surface of the end cover 6.

[0037] When this embodiment is in use, by optimizing the original trunnion sealing ring from 4 components to a double - channel soft seal, it can bear pressure and solve the problem of vertical movement at the same time, greatly reducing the operation failure rate. Through the structural optimization, the number of processed parts is reduced, further controlling the production cost.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotating trunnion for a high-pressure metering pump, comprising a housing (7); and a pendulum body (8) arranged inside the housing (7); The front section of the pendulum body (8) penetrates through the housing (7) and extends to the front of the housing (7), and is characterized in that: End covers (6) are symmetrically arranged at the upper and lower ends of the housing (7) corresponding to the inner section of the pendulum body (8); The two end covers (6) are close to each other and penetrate the outer side surface of the shell (7) to extend into the shell (7) and contact the surface of the pendulum (8). The end covers (6) are provided with through holes from top to bottom, and bushings (1) are vertically arranged inside the through holes. Two circles of mounting ring grooves (3) are evenly arranged horizontally on the outer side of the bushings (1) from top to bottom, and bushing seals (2) are horizontally arranged inside the mounting ring grooves (3).

2. A rotary trunnion for a high pressure metering pump according to claim 1, characterized in that: Screws (10) are evenly arranged on the outer side of the end cover (6) along the end cover (6), and the screws (10) penetrate the end cover (6) and extend into the interior of the shell (7), and the surface of the screws (10) is threadedly connected to the inner wall of the shell (7).

3. A rotating trunnion for a high pressure metering pump according to claim 2, characterized in that: A sealing ring groove (4) is horizontally provided on the side of the end cover (6), a sealing ring (11) is horizontally provided inside the sealing ring groove (4), the outer side surface of the sealing ring (11) is in sealing and extruding contact with the inner wall of the housing (7), and the inner side surface of the sealing ring (11) is in sealing and extruding contact with the inner wall of the sealing ring groove (4).

4. The rotary trunnion for a high-pressure metering pump according to claim 1, characterized in that: The outer side surface of the bushing seal (2) is sealingly rotatably connected to the inner wall of the through hole, and the inner side surface of the bushing seal (2) is sealingly extruded in contact with the inner wall of the mounting ring groove (3).

5. The rotary trunnion for a high-pressure metering pump according to claim 1, characterized in that: A retaining ring groove is horizontally provided on the inner wall of the through hole above the bushing (1), a retaining ring (5) is horizontally arranged inside the retaining ring groove, and the bottom end surface of the retaining ring (5) is in clamping contact with the top end surface of the bushing (1).

6. The rotary trunnion for a high-pressure metering pump according to claim 1, characterized in that: A pendulum bearing (9) is sleeved on the outer side of the inner end of the end cover (6), and the pendulum bearing (9) is embedded in the inner end surface of the pendulum (8).

7. The rotary trunnion for a high-pressure metering pump according to claim 6, characterized in that: The pendulum bearing (9) is a sealed bearing, the outer side surface of the pendulum bearing (9) is fixedly connected to the inner wall of the pendulum body (8), and the inner side surface of the pendulum bearing (9) is fixedly connected to the inner end surface of the end cover (6).

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