Rotary sealing system of novel concrete mixing truck

Abstract

The utility model relates to a novel rotary sealing system of a concrete mixing truck, which belongs to the technical field of engineering machinery, is connected between a tank body and a material port assembly and comprises a rotary support and a sealing frame, and the rotary support and the sealing frame are sequentially connected to the surface of a tank port of the tank body in a sleeved mode and connected with the material port assembly. The slewing bearing and the sealing frame are connected in a spigot fit mode. According to the utility model, the slewing bearing is matched with the seam allowance of the sealing frame, so that extremely-stable coaxiality is ensured during rotary motion, the sealing ring arranged in the sealing frame is tightly attached to the end part of the tank opening of the tank body to form stable rotary sealing, and the lubricating oil channel is arranged in the sealing frame, so that the sealing effect is improved. By adding lubricating oil, a lubricating film is formed on the contact surface of the sealing ring and the tank opening of the tank body, so that the extremely high stable coaxiality can be ensured, the sealing reliability is improved, and the service life of the sealing system is prolonged.

Description

Technical Field

[0001] The utility model relates to a rotary sealing system of a concrete mixer truck, in particular to a rotary sealing system of a new type of concrete mixer truck with high stability, which belongs to the technical field of construction machinery. Background Technique

[0002] Chinese utility model patent CN207240504U discloses a multi-disc rotary sealing system of a concrete mixer truck, which includes a material port assembly and a tank body. A material port fixing plate, a transition disc and a slewing bearing are sequentially installed between the material port assembly and the tank body. The inner ring of the slewing bearing and the transition disc are connected to the tank body by bolts, the material port fixing plate is connected to the material port assembly by bolts, and the outer ring of the slewing bearing and the material port assembly are clamped and fixed by a clip. The material port fixing plate is provided with an annular groove, and a sealing ring is installed in the annular groove. A limiting plate is also included. One end of the limiting plate is installed on the surface of the outer ring of the slewing bearing, and the other end is installed on the material port fixing plate. The above system ensures the sealing effect during the rotary motion of the tank body through the assembly of the transition disc and the inner ring of the slewing bearing, so that concrete will not overflow between the hopper and the tank body; at the same time, a material port fixing plate is installed on the hopper, and a sealing ring is arranged in the annular groove of the material port fixing plate. By adding lubricating oil, sufficient lubrication is achieved between various parts, and a lubricating oil film is formed between the parts with relative motion, ensuring the reliability of the seal and improving the service life of the parts; the limiting plate plays a role in restricting the concentricity of each part.

[0003] However, the above multi-disc rotary sealing system has a complex structure and consists of multiple components. Among them, the limiting plate is relied on to connect the outer ring of the slewing bearing and the material port fixing plate. The limiting plate is connected to the above two components by bolts. The strength of the limiting plate and the clearance of the bolt fit cannot ensure the coaxiality of each component during the rotary motion, resulting in a poor coaxiality between the sealing ring in the annular groove of the material port fixing plate and the tank body, and uneven sealing force, so the long-term effective sealing cannot be guaranteed. Summary of the Utility Model

[0004] Technical Objective: In order to overcome the deficiencies existing in the prior art, the utility model provides a rotary sealing system of a new type of concrete mixer truck.

[0005] Technical Solution: To achieve the above objective, a rotary sealing system of a new type of concrete mixer truck disclosed by the utility model is connected between the tank body and the material port assembly, and includes a slewing bearing and a sealing frame. The slewing bearing and the sealing frame are sequentially sleeved and connected to the surface of the tank mouth of the tank body and are connected to the material port assembly; the slewing bearing and the sealing frame are connected by a spigot fit.

[0006] Furthermore, flanges are arranged at intervals at the mouth of the tank body. The end of the mouth of the tank body is correspondingly connected to the inner wall of the sealing frame. The flanges are connected to the inner ring of the slewing bearing through connecting pieces, and the outer ring of the slewing bearing is connected to the sealing frame and the material inlet assembly through connecting pieces.

[0007] Furthermore, a convex stop is arranged on the connecting surface between the slewing bearing and the sealing frame, and a concave stop is arranged on the connecting surface between the sealing frame and the slewing bearing.

[0008] Furthermore, an annular groove is arranged along the circumference on the inner wall of the sealing frame, and a sealing ring is connected in the annular groove.

[0009] Even further, a lubricating oil passage is arranged in the sealing frame, and the lubricating oil passage communicates with the annular groove.

[0010] Furthermore, an overflow port is arranged on the outer wall of the sealing frame.

[0011] In the utility model, through the cooperation of the stop of the slewing bearing and the sealing frame, the extremely high and stable coaxiality is ensured during the rotary motion. The sealing ring arranged in the sealing frame is in close fit with the end of the mouth of the tank body to form a stable rotary seal. A lubricating oil passage is arranged in the sealing frame, and by adding lubricating oil, a lubricating film is formed on the contact surface between the sealing ring and the mouth of the tank body, which can improve the reliability of the seal while ensuring the extremely high and stable coaxiality, and extend the service life of the sealing system; the rotary sealing system has a simple structure, is convenient to use and maintain, greatly improves the stability of the rotary sealing system during long-term operation, and meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall structural schematic diagram of the utility model;

[0013] Figure 2 is the exploded view of the utility model;

[0014] Figure 3 is the structural schematic diagram of the sealing frame in the utility model;

[0015] Figure 4 is Figure 3 the structural schematic diagram of part A in

[0016] In the figure, 1, tank body; 2, material inlet assembly; 3, slewing bearing; 4, sealing frame; 5, flange; 6, connecting piece; 7, annular groove; 8, sealing ring; 9, lubricating oil passage; 10, overflow port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following is combined with the attached Figure 1 to the attached Figure 4The principles and features of the present utility model are described. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0018] A rotary sealing system for a new type of concrete mixer truck, which is connected between a tank body 1 and a material inlet assembly 2, includes a slewing bearing 3 and a sealing frame 4. The slewing bearing 3 and the sealing frame 4 are sequentially sleeved and connected to the surface of the tank mouth of the tank body 1 and are connected to the material inlet assembly 2. The slewing bearing 3 and the sealing frame 4 are connected by a spigot fit. This system ensures extremely high stable coaxiality during rotary motion through a stable spigot fit.

[0019] Flanges 5 are arranged at intervals at the tank mouth of the tank body 1. The end of the tank mouth of the tank body 1 is correspondingly connected to the inner wall of the sealing frame 4. The flanges 5 are connected to the inner ring of the slewing bearing 3 through connecting pieces 6, and the outer ring of the slewing bearing 3 is connected to the sealing frame 4 and the material inlet assembly 2 through connecting pieces 6. The connecting pieces 6 are bolts.

[0020] A convex spigot is provided on the connecting surface of the slewing bearing 3 and the sealing frame 4, and a concave spigot is provided on the connecting surface of the sealing frame 4 and the slewing bearing 3. After installation, the spigots of the two components are in fit.

[0021] An annular groove 7 is arranged along the circumference on the inner wall of the sealing frame 4. In specific applications, multiple annular grooves 7 can be arranged, and a sealing ring 8 is connected in the annular groove 7.

[0022] A lubricating oil passage 9 is arranged in the sealing frame 4. The lubricating oil passage 9 communicates with the annular groove 7. By adding lubricating oil, a lubricating film is formed on the contact surface between the sealing ring 8 and the tank mouth of the tank body 1, which can improve the sealing reliability while ensuring extremely high stable coaxiality.

[0023] An overflow port 10 is arranged on the outer wall of the sealing frame 4. When the sealing ring 8 is damaged, the lubricating oil will overflow from the overflow port 10, which is convenient for observing the sealing condition.

[0024] This rotary sealing system can improve the sealing reliability and extend the service life while ensuring extremely high stable coaxiality. This rotary sealing system has a simple structure, is convenient to use and maintain, greatly improves the stability of the rotary sealing system during long-term operation, and meets the use requirements.

[0025] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A new type of rotary sealing system for a concrete mixer truck, connected between a tank body (1) and a material inlet assembly (2), characterized in that: It comprises a slewing bearing (3) and a sealing frame (4), wherein the slewing bearing (3) and the sealing frame (4) are sequentially sleeved and connected to the surface of the tank mouth of the tank body (1), and are connected to the material mouth assembly (2); the slewing bearing (3) and the sealing frame (4) are connected by means of stopper matching.

2. The rotary sealing system of the new concrete mixer truck according to claim 1 is characterized in that: The tank mouth of the tank body (1) is provided with flanges (5) at intervals, the end of the tank mouth of the tank body (1) is correspondingly connected to the inner wall of the sealing frame (4), the flange (5) is connected to the inner ring of the slewing bearing (3) through a connecting piece (6), and the outer ring of the slewing bearing (3) is connected to the sealing frame (4) and the material port assembly (2) through a connecting piece (6).

3. The rotary sealing system of the new concrete mixer truck according to claim 1 is characterized in that: The connection surface between the slewing bearing (3) and the sealing frame (4) is provided with a convex stop, and the connection surface between the sealing frame (4) and the slewing bearing (3) is provided with a concave stop.

4. The rotary sealing system of the new concrete mixer truck according to claim 1 is characterized by: An annular groove (7) is provided on the inner wall of the sealing frame (4) along the circumferential direction, and a sealing ring (8) is connected inside the annular groove (7).

5. The rotary sealing system of the new concrete mixer truck according to claim 4 is characterized in that: A lubricating oil passage (9) is provided in the sealing frame (4), and the lubricating oil passage (9) is communicated with the annular groove (7).

6. The rotary sealing system of the new concrete mixer truck according to claim 1 is characterized by: An overflow port (10) is provided on the outer wall of the sealing frame (4).

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