Hydraulic station for controlling fan clutch

Abstract

The utility model discloses a fan clutch control hydraulic station which comprises an oil tank assembly, a control valve set, a main motor pump set and a standby motor pump set are installed on the oil tank assembly, an energy accumulator set is installed on the side edge of the oil tank assembly, and the control valve set is connected with the oil tank assembly and a fan clutch through a pipeline. The main motor pump set and the standby motor pump set provide power for the control valve set. According to actual fan control requirements, a hydraulic system control scheme of the three-phase asynchronous motor pump set and the energy accumulator is adopted, the three clutches are controlled at the same time to control the hydraulic plunger type cylinder, the stability of oil pressure of the plunger type cylinder is guaranteed, the response speed requirement of the plunger type cylinder is met, installation and arrangement are simple, control accuracy is high, coordination control performance is good, and cost is low. In order to ensure the use safety of the fan, the fan clutch hydraulic control system is additionally provided with an energy accumulator serving as a constant-pressure power source, and is provided with two sets of motor pump sets, one motor pump set is used, and the other motor pump set is standby, so that the safety of the fan system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clutch control equipment, in particular to a fan clutch control hydraulic station. Background Art

[0002] The fan clutch is mainly used to control the start and stop of the fan power transmission process. During operation, the clutch is engaged and disengaged through the extension and retraction of the hydraulic plunger cylinder plunger.

[0003] During the actual operation of the fan, the clutch hydraulic control system needs to simultaneously control the engagement or disengagement of multiple clutches according to work requirements and the operation effect of the fan.

[0004] The existing fan clutch hydraulic control systems are mainly divided into two categories. One is that each clutch control hydraulic station controls a hydraulic plunger cylinder individually, and multiple clutch control hydraulic stations work together during operation to achieve on-demand control of the fan clutch; the other is that a clutch control hydraulic station controls multiple hydraulic plunger cylinders at the same time to achieve coordinated action of multiple fan clutches.

[0005] Although the method of controlling a single clutch hydraulic piston cylinder with a single clutch control hydraulic station can ensure that the oil pressure of each working cylinder is sufficient and the response time is fast, the installation space required for multiple fan clutches to work together is large, the layout is cumbersome, and the coordinated control is difficult. It is easily affected by the external environment and causes problems such as clutch control asynchrony, which affects the operation of the fan.

[0006] The solution of a clutch control hydraulic station controlling multiple hydraulic plunger cylinders at the same time is easy to install during operation and easy to achieve coordinated control of multiple clutch control plunger cylinders. However, it is easily affected by problems such as pipeline layout and flow distribution, resulting in problems such as low plunger cylinder control accuracy and substandard response speed.

[0007] Therefore, we propose a fan clutch control hydraulic station to solve the above problems. Utility Model Content

[0008] The utility model aims to provide a fan clutch control hydraulic station to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fan clutch control hydraulic station, comprising: an oil tank assembly, a control valve group, a main motor pump group and a standby motor pump group are installed on the oil tank assembly, an accumulator group is installed on the side of the oil tank assembly, the control valve group is connected to the oil tank assembly and the fan clutch through a pipeline, and the main motor pump group and the standby motor pump group provide power for the control valve group;

[0010] The control valve group is composed of a valve block, a normally open two-position two-way solenoid valve, a check valve, a relief valve, a pressure reducing valve, a pressure sensor, a pressure measuring joint, a normally open two-position two-way solenoid valve and other hydraulic oil circuit accessories;

[0011] There are four normally open two-position two-way solenoid valves, one of which is located in the main oil circuit between the main motor pump group and the clutch oil cylinder, and the other three are connected in series with each clutch hydraulic plunger cylinder respectively;

[0012] There are two one-way valves, which are arranged at the oil inlet oil passage connecting the valve block and the oil delivery pipe of each main motor pump group. The overflow valve is arranged between the one-way valves and the main filter of the corresponding oil passages of the two motor pump groups. The pressure reducing valve is arranged in the oil circuit of the standby motor pump group.

[0013] The normally-off two-position two-way solenoid valve is located in the oil circuit of the standby motor pump group and is connected to each clutch hydraulic plunger cylinder respectively;

[0014] There are four pressure sensors in total, three of which are 0-40 bar in size and are arranged in the oil circuit connected to the clutch hydraulic plunger cylinder in the valve block, and one 0-160 bar pressure sensor is arranged in the accumulator group.

[0015] Preferably, the oil tank assembly is provided with a hydraulic oil tank with a volume of L.

[0016] Preferably, the oil tank is equipped with a temperature sensor, an air filter element, a visual liquid level and temperature gauge, a liquid level alarm gauge, an electric heater, and an oil drain ball valve.

[0017] Preferably, the accumulator group is an L standard accumulator.

[0018] Preferably, the main motor pump group and the standby motor pump group are both three-phase asynchronous motor pump groups.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] According to the actual fan control requirements, a hydraulic system control scheme of a three-phase asynchronous motor pump group plus an accumulator is adopted, and three clutches are controlled at the same time to control the hydraulic plunger cylinder, which not only ensures the stability of the plunger cylinder oil pressure, but also meets the plunger cylinder reaction speed requirements. The installation and layout are simple, the control accuracy is high, and the coordinated controllability is good. In order to ensure the safety of the fan, the fan clutch hydraulic control system of the utility model is additionally designed with an accumulator as a constant pressure power source, and is equipped with two sets of motor pump groups, one for use and one for backup, which greatly improves the safety of the fan system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a rear view of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the control valve group in the utility model;

[0024] Figure 4 It is a rear view of the valve block in the utility model;

[0025] Figure 5 It is a schematic diagram of the oil circuit of the utility model.

[0026] In the figure: 1. Oil tank assembly; 2. Control valve group; 3. Accumulator group; 4. Main motor pump group; 5. Standby motor pump group; 6. Valve block; 7. Normally open two-position two-way solenoid valve; 8. Check valve; 9. Overflow valve; 10. Pressure reducing valve; 11. Pressure sensor; 12. Pressure measuring connector; 13. Normally open two-position two-way solenoid valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 The utility model provides a technical solution: a fan clutch control hydraulic station, comprising: an oil tank assembly 1, on which a control valve group 2, a main motor pump group 4 and a standby motor pump group 5 are installed, and an accumulator group 3 is installed on the side of the oil tank assembly 1;

[0029] The control valve assembly 2 is connected to the oil tank assembly 1 and the fan clutch through a pipeline;

[0030] The oil tank assembly 1 is provided with a hydraulic oil tank with a volume of 100L, and the oil tank is equipped with components such as a temperature sensor, an air filter element, a visual liquid level thermometer, a liquid level alarm meter, an electric heater, and an oil drain ball valve;

[0031] The control valve group 2 is composed of a valve block 6, a normally open two-position two-way solenoid valve 7, a one-way valve 8, a relief valve 9, a pressure reducing valve 10, a pressure sensor 11, a pressure measuring joint 12, a normally closed two-position two-way solenoid valve 13 and other hydraulic oil circuit accessories;

[0032] There are four normally open two-position two-way solenoid valves 7, one of which is located in the main oil circuit between the main motor pump group 4 and the clutch oil cylinder, responsible for controlling the on-off of the main oil circuit from the main motor pump group 4 to the clutch hydraulic plunger cylinder, and the other three are connected in series with each clutch hydraulic plunger cylinder to control the on-off of the main oil circuit to each plunger cylinder oil circuit;

[0033] There are two one-way valves 8, which are arranged at the oil inlet oil passage connecting the valve block 6 and the oil delivery pipe of each main motor pump group 4 to prevent oil backflow caused by excessive load on the hydraulic plunger cylinder;

[0034] A total of one overflow valve 9 is set between the one-way valve 8 and the main filter of the oil passages corresponding to the two motor pump groups. When the pressure in the system is too high, it controls the over-pressure oil to flow back to the oil tank through the filter to prevent the system from being damaged due to excessive pressure;

[0035] There is one pressure reducing valve 10, which is arranged in the oil circuit of the standby motor pump group 5, and is used to reduce the oil pressure of the oil circuit and reduce the pressure shock caused by suddenly connecting the standby motor pump group 5;

[0036] There are three normally-off two-position two-way solenoid valves 13, which are located in the oil circuit of the standby motor pump group 5 and are respectively connected to each clutch hydraulic plunger cylinder, and are used to control the operation of each plunger cylinder when the main motor pump group 4 is turned off and the standby motor pump group 5 is enabled;

[0037] There are four pressure sensors 11, three of which are 0-40 bar in specification and arranged in the oil circuit connected to the clutch hydraulic plunger cylinder in the valve block 6, responsible for measuring the hydraulic oil pressure delivered by the system to each clutch plunger, and the remaining one 0-160 bar pressure sensor 11 is arranged in the accumulator assembly 3, responsible for measuring the accumulator oil circuit pressure;

[0038] Control valve group 2 is mainly responsible for controlling the on and off of the hydraulic plunger cylinder oil circuit of each fan clutch according to the instructions sent by the control system and monitoring the working pressure, flow rate, etc. of the hydraulic system;

[0039] Accumulator group 3 uses 4L standard accumulators to serve as the system's constant pressure power source;

[0040] The main motor pump group 4 and the standby motor pump group 5 are both three-phase asynchronous motor pump groups, which are responsible for providing power for the entire fan clutch hydraulic control system, and cooperate with the control valve group 2, etc. to provide pressurized oil for each clutch control hydraulic plunger cylinder;

[0041] When the fan clutch control hydraulic station is working, the main motor pump group 4 works to suck the hydraulic oil out of the oil tank assembly 1, and pressurizes it to the control valve group 2. The solenoid valve on the control valve group 2 receives the control command and controls the flow of the oil inside the valve group 2. The three fan clutch hydraulic plunger cylinders can be controlled to work synchronously or independently, and the extension time of each hydraulic plunger cylinder plunger is 0.8s, which meets the opening and closing requirements of the fan clutch. When the main motor pump group 4 has problems and cannot work normally, the standby motor pump group 5 can be started to replace the main motor pump group 4 to continue to control the fan clutch.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan clutch control hydraulic station, comprising: An oil tank assembly (1), wherein a control valve group (2), a main motor pump group (4) and a standby motor pump group (5) are mounted on the oil tank assembly (1); an accumulator group (3) is mounted on the side of the oil tank assembly (1); the control valve group (2) is connected to the oil tank assembly (1) and a fan clutch via a pipeline; the main motor pump group (4) and the standby motor pump group (5) provide power for the control valve group (2); The invention is characterized in that the control valve group (2) is composed of a valve block (6), a normally open two-position two-way solenoid valve (7), a check valve (8), a relief valve (9), a pressure reducing valve (10), a pressure sensor (11), a pressure measuring joint (12), a normally closed two-position two-way solenoid valve (13) and hydraulic oil circuit accessories; There are four normally open two-position two-way solenoid valves (7), one of which is located in the main oil circuit between the main motor pump group (4) and the clutch oil cylinder, and the remaining three are connected in series with each clutch hydraulic plunger cylinder respectively; There are two one-way valves (8) arranged at the oil inlet passage connecting the valve block (6) and the oil delivery pipe of each main motor pump group (4); the overflow valve (9) is arranged between the one-way valves (8) and the main filter of the oil passages corresponding to the two motor pump groups; and the pressure reducing valve (10) is arranged in the oil passage of the standby motor pump group (5); The normally-off two-position two-way solenoid valve (13) is located in the oil circuit of the standby motor pump group (5) and is respectively connected to each clutch hydraulic plunger cylinder; There are four pressure sensors (11) in total, three of which are 0-40 bar in specification and are arranged in the oil circuit connected to the clutch hydraulic plunger cylinder in the valve block (6), and one 0-160 bar pressure sensor (11) is arranged in the accumulator group (3).

2. A fan clutch control hydraulic station according to claim 1, characterized in that: The oil tank assembly (1) is provided with a hydraulic oil tank with a volume of 100L.

3. A fan clutch control hydraulic station according to claim 2, characterized in that: The oil tank is equipped with a temperature sensor, an air filter element, a visual liquid level and temperature gauge, a liquid level alarm gauge, an electric heater, and an oil drain ball valve.

4. A fan clutch control hydraulic station according to claim 1, characterized in that: The accumulator group (3) is a 4L accumulator.

5. A fan clutch control hydraulic station according to claim 1, characterized in that: The main motor pump group (4) and the standby motor pump group (5) are both three-phase asynchronous motor pump groups.

Images