Pressure relief device of hydraulic retarder

Abstract

The utility model relates to the technical field of retarders, and discloses a hydraulic retarder pressure relief device which comprises a retarder working cavity composed of a retarding rotor and a retarding stator, a pressure relief pipeline is arranged on the retarder working cavity, an exhaust valve is arranged on the pressure relief pipeline, and an oil-proof breathable film is arranged at the tail end of the exhaust pipeline located at the rear end of the exhaust valve. The pressure relief device is simple in structure and convenient to install, the pressure relief pipeline is connected with the working cavity of the retarder, the exhaust valve is installed on the pressure relief pipeline, pressure relief operation can be rapidly completed on the working cavity of the retarder, and the situation that internal pressure in the working cavity of the retarder is too high is avoided; oil-gas mixtures can be effectively separated, pollution to the environment is avoided, and oil waste and pollution to the surface of equipment can also be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of retarders, and particularly relates to a hydraulic retarder pressure relief device. Background Technique

[0002] As an important auxiliary braking system for modern heavy vehicles such as trucks and buses, the hydraulic retarder reduces the burden on the traditional friction braking system by converting the vehicle's kinetic energy into heat energy, especially when driving downhill over a long distance. However, in practical applications, a key problem faced by the hydraulic retarder is the management of internal pressure and temperature.

[0003] At present, in the market, when the hydraulic retarder is in a long-term high-load working state, the internal oil temperature and pressure are prone to rise sharply. If the pressure is not relieved in a timely and effective manner, the excessive temperature and pressure may cause system failures, and even lead to the aging or rupture of seals, posing safety hazards. At the same time, the continuous high-temperature and high-pressure working conditions will accelerate the aging of internal parts and shorten the overall service life of the hydraulic retarder. During the pressure relief process of the hydraulic retarder, since the internal working medium is usually oil, the gas discharged during the pressure relief process often contains a certain amount of oil-gas mixture. This oil-gas mixture not only pollutes the environment, but also may cause oil waste and pollution of the equipment surface. Therefore, simply relying on the existing pressure relief technology cannot fully meet the requirements of environmental protection and equipment maintenance.

[0004] In view of the above problems, there is an urgent need in the market for an efficient, reliable and simple-structured oil-gas separation technology that can effectively separate the oil-gas mixture during the pressure relief process of the hydraulic retarder, reduce environmental pollution and resource waste, and improve the safety and service life of the equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic retarder pressure relief device with a simple structure and convenient operation for the above problems.

[0006] To achieve the above purpose, the utility model discloses a hydraulic retarder pressure relief device, the structural feature of which is that it includes a retarder working cavity composed of a retarder rotor and a retarder stator. A pressure discharge pipeline is arranged on the retarder working cavity, and an exhaust valve is arranged on the pressure discharge pipeline. An oil-proof breathable membrane is arranged at the end of the exhaust pipeline behind the exhaust valve.

[0007] After adopting the above structure, by connecting the pressure discharge pipeline with the retarder working cavity and installing an exhaust valve on the pressure discharge pipeline, the pressure relief operation of the retarder working cavity can be quickly completed, avoiding the situation of excessive internal pressure in the retarder working cavity. The oil-proof breathable membrane arranged at the end of the pressure discharge pipeline can effectively separate the oil-gas mixture, avoid environmental pollution, and also avoid oil waste and pollution of the equipment surface.

[0008] Preferably, a positioning and installation shell is provided at the end of the pressure relief pipeline. The positioning and installation shell is a box body with a closed perimeter and an open upper part. A communication port is provided at the bottom of the positioning and installation shell. The end pipe orifice of the pressure relief pipeline is installed at the communication port in the lower part of the positioning and installation shell, and the oil-proof breathable membrane covers the open upper part of the positioning and installation shell. By installing the positioning and installation shell at the end of the pressure relief pipeline and covering the oil-proof breathable membrane on the upper part of the positioning and installation shell, the separation area of the oil-gas mixture can be increased, and the separation efficiency of the oil-gas mixture can be higher.

[0009] Preferably, an oil-gas filtering mechanism is provided at a position near the upper oil-proof breathable membrane inside the positioning and installation shell. By installing the oil-gas filtering mechanism inside the positioning and installation shell, the separation of the oil-gas mixture can be further enhanced, and at the same time, the damage to the oil-proof breathable membrane caused by too high air pressure or too high oil content can be effectively avoided.

[0010] Preferably, the oil-gas filtering mechanism includes a positioning cylinder screwed to the positioning and installation shell. A horizontally arranged oil-gas filtering impeller is provided in the middle of the positioning cylinder. Positioning mounting frames matching the mounting shaft on the oil-gas filtering impeller are provided on the inner walls of the positioning cylinder on the upper and lower sides of the oil-gas filtering impeller. By screwing the positioning cylinder into the positioning and installation shell body, the oil-gas filtering impeller is suspended and fixed, so as to ensure that when relieving pressure, the gas makes the oil-gas filtering impeller rotate rapidly and the oil-gas filtering impeller further separates the oil in the oil-gas mixture. At the same time, the detachable and installable oil-gas filtering mechanism is also more convenient for the staff to overhaul and install the device.

[0011] Preferably, an oil collecting groove is provided at the bottom of the positioning and installation shell below the oil-proof breathable membrane, and an oil drain port is provided at the bottom of the oil collecting groove. By matching the oil collecting groove with the oil drain port, the oil separated by the oil-gas filtering impeller in the positioning and installation shell can be more conveniently collected.

[0012] Preferably, the oil collecting groove is an annular groove body arranged around the communication port.

[0013] Preferably, the longitudinal section of the annular groove body is a groove body structure with two high sides, a low middle part, and an arc-shaped bottom.

[0014] Preferably, a clamping hoop matching the oil-proof breathable membrane is provided on the outer wall of the upper part of the positioning and installation shell and near the upper end opening position. By fixing the oil-proof breathable membrane on the upper part of the positioning and installation shell with the clamping hoop, it is more convenient and fast for the staff to replace it.

[0015] In summary, the beneficial effects of the present utility model are as follows: The energy structure of the present utility model is simple and easy to install. By connecting the pressure relief pipeline to the working chamber of the retarder and installing an exhaust valve on the pressure relief pipeline, the pressure relief operation of the working chamber of the retarder can be quickly completed, avoiding the situation of excessive internal pressure in the working chamber of the retarder. The oil and gas permeable membrane provided at the end of the pressure relief pipeline can effectively separate the oil and gas mixture, avoid environmental pollution, and also avoid oil waste and pollution of the equipment surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a cross-sectional structural diagram of the positioning and installation shell of the present utility model;

[0018] Figure 3 is a top view structural diagram of the oil and gas filtering mechanism of the present utility model.

[0019] In the figure: 1, retarder rotor; 2, retarder stator; 3, working chamber of the retarder; 4, pressure relief pipeline; 5, exhaust valve; 6, oil and gas permeable membrane; 7, positioning and installation shell; 8, communication port; 9, oil and gas filtering mechanism; 10, positioning cylinder; 11, oil and gas filtering impeller; 12, installation shaft; 13, positioning and installation frame; 14, oil collecting groove; 15, oil drain port; 16, clamping hoop. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0022] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0023] The following is a description of the preferred embodiments of the present utility model in conjunction with the drawings.

[0024] As Figure 1 shown, the utility model includes a retarder working chamber 3 composed of a retarder rotor 1 and a retarder stator 2. A pressure discharge pipeline 4 is installed on the retarder working chamber 3. At the same time, an exhaust valve 5 for controlling the pressure relief of the retarder working chamber 3 is installed on the pressure discharge pipeline 4. An oil-proof breathable membrane 6 for separating oil and gas is arranged at the end of the exhaust pipeline behind the exhaust valve 5. During design, a positioning installation shell 7 is arranged at the end of the pressure discharge pipeline 4. The positioning installation shell 7 is a box body with a closed perimeter and an open upper part. A communication port 8 is arranged at the bottom of the positioning installation shell 7. Among them, the end pipe orifice of the pressure discharge pipeline 4 is installed at the communication port 8 at the lower part of the positioning installation shell 7, and the above-mentioned oil-proof breathable membrane 6 covers the open upper part of the positioning installation shell 7. In this way, by installing the positioning installation shell 7 at the end of the pressure discharge pipeline 4 and covering the oil-proof breathable membrane 6 on the upper part of the positioning installation shell 7, the separation area of the oil and gas mixture can be increased, making the separation efficiency of the oil and gas mixture higher. Of course, the structures and installation methods of the above-mentioned retarder working chamber 3 and the exhaust valve 5 are well-known structures. A lubricating oil circulation oil path is also connected to the retarder working chamber 3, which will not be elaborated here. And by connecting the above-mentioned pressure discharge pipeline 4 to the retarder working chamber 3 and installing the exhaust valve 5 on the pressure discharge pipeline 4, the pressure relief operation of the retarder working chamber 3 can be completed quickly, avoiding the situation of excessive internal pressure in the retarder working chamber 3. The oil-proof breathable membrane 6 arranged at the end of the pressure discharge pipeline 4 can effectively separate the oil and gas mixture, avoid environmental pollution, and also avoid oil waste and pollution of the equipment surface.

[0025] As Figure 2 and Figure 3As shown in the figure, in a preferred embodiment of the present utility model, an oil and gas filtering mechanism 9 is provided at a position near the upper oil-proof breathable membrane 6 inside the positioning and mounting shell 7. The oil and gas filtering mechanism 9 includes a positioning cylinder 10 screwed to the positioning and mounting shell 7. In design, an oil and gas filtering impeller 11 arranged horizontally is provided in the middle of the positioning cylinder 10, and positioning and mounting frames 13 matching the mounting shaft 12 on the oil and gas filtering impeller 11 are provided on the inner walls of the positioning cylinder 10 on both the upper and lower sides of the oil and gas filtering impeller 11. In manufacturing, the positioning and mounting frames 13 are brackets fixed horizontally at the upper and lower openings of the positioning cylinder 10, and bearings corresponding to the mounting shaft 12 on the oil and gas filtering impeller 11 are provided in the middle of the two brackets. In this way, by screwing the positioning cylinder 10 into the positioning and mounting shell 7, the oil and gas filtering impeller 11 is suspended and fixed, so as to ensure that when pressure is relieved, the gas makes the oil and gas filtering impeller 11 rotate rapidly and the oil and gas filtering impeller 11 further separates the oil in the oil and gas mixture. At the same time, the detachable oil and gas filtering mechanism 9 is also more convenient for the staff to repair and install the device. Of course, in manufacturing, the inner diameter of the cross-section of the positioning and mounting shell 7 is adapted to the outer diameter of the positioning cylinder 10. Threads are provided on the outer wall of the positioning cylinder 10, and internal threads matching the external threads of the positioning cylinder 10 are provided on the upper side wall of the positioning and mounting shell 7.

[0026] As Figure 2 shown, in another preferred embodiment of the present utility model, an oil collecting groove 14 is provided at the bottom of the positioning and mounting shell 7 below the oil-proof breathable membrane 6, and an oil discharge port 15 is further provided at the bottom of the oil collecting groove 14. In design, the oil collecting groove 14 is an annular groove body arranged around the communication port 8. The longitudinal section of the annular groove body is a groove body structure with both sides high and the middle low and the bottom being arc-shaped, and the arc is concave. In this way, through the arc-shaped bottom structure of the oil collecting groove 14, it is more convenient to collect the oil. And through the cooperation of the oil collecting groove 14 and the oil discharge port 15, the oil separated by the oil and gas filtering impeller 11 in the positioning and mounting shell 7 can be more conveniently collected. In order to facilitate the replacement of the oil-proof breathable membrane 6, a clamping hoop 16 matching the oil-proof breathable membrane 6 is provided on the outer wall of the upper part of the positioning and mounting shell 7 and near the upper opening position. In this way, the oil-proof breathable membrane 6 is fixed on the upper part of the positioning and mounting shell 7 through the clamping hoop 16, which is also more convenient and fast for the staff to replace. Of course, the above-mentioned clamping hoop 16 is a well-known structure and will not be elaborated here.

[0027] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A hydraulic retarder pressure relief device, characterized in that: It includes a retarder working chamber (3) composed of a retarder rotor (1) and a retarder stator (2). A pressure discharge pipe (4) is arranged on the retarder working chamber (3). An exhaust valve (5) is arranged on the pressure discharge pipe (4). An oil-proof breathable membrane (6) is arranged at the end of the exhaust pipe behind the exhaust valve (5).

2. The hydraulic retarder pressure relief device according to claim 1, wherein: A positioning installation shell (7) is arranged at the end of the pressure discharge pipe (4). The positioning installation shell (7) is a box body with a closed perimeter and an open top. A communication port (8) is arranged at the bottom of the positioning installation shell (7). The end pipe orifice of the pressure discharge pipe (4) is installed at the communication port (8) at the lower part of the positioning installation shell (7). The oil-proof breathable membrane (6) covers the open top of the positioning installation shell (7).

3. The hydraulic retarder pressure relief device according to claim 2, wherein: An oil and gas filtering mechanism (9) is arranged at a position close to the upper oil-proof breathable membrane (6) inside the positioning installation shell (7).

4. The hydraulic retarder pressure relief device according to claim 3, wherein: The oil and gas filtering mechanism (9) includes a positioning cylinder (10) screwed to the positioning installation shell (7). An oil and gas filtering impeller (11) arranged horizontally is arranged in the middle of the positioning cylinder (10). Positioning installation frames (13) matching the mounting shaft (12) on the oil and gas filtering impeller (11) are arranged on the inner walls of the positioning cylinder (10) on the upper and lower sides of the oil and gas filtering impeller (11).

5. The hydraulic retarder pressure relief device according to claim 1, characterized in that: An oil sump (14) is arranged at the bottom of the positioning installation shell (7) below the oil-proof breathable membrane (6). An oil drain port (15) is arranged at the bottom of the oil sump (14).

6. The hydraulic retarder pressure relief device according to claim 5, characterized in that: The oil sump (14) is an annular groove body arranged around the communication port (8).

7. The hydraulic retarder pressure relief device according to claim 6, characterized in that: The longitudinal section of the annular groove body is a groove body structure with two high sides, a low middle, and an arc-shaped bottom.

8. The hydraulic retarder pressure relief device according to claim 2, characterized in that: A clamping hoop (16) matching the oil-proof breathable membrane (6) is arranged on the outer wall of the upper part of the positioning installation shell (7) and close to the upper end opening position.

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