A hydraulic closed walking system for preventing skidding on a support transporter

Abstract

The present invention discloses a hydraulic closed travel system for preventing skidding on a support transporter, comprising a power source, a closed hydraulic pump, an oil replenishment pump, an oil replenishment safety valve, an oil replenishment one-way valve group, an overflow valve group and a travel hydraulic motor group, wherein the power source, the closed hydraulic pump, the oil replenishment pump and the oil replenishment safety valve are connected in sequence, and further comprising a pressure compensation valve group, wherein the overflow valve group and the travel hydraulic motor group are connected via the pressure compensation valve group. The present invention uses the regulating function of the pressure compensation valve group to adjust the flow through each hydraulic motor when the ground adhesion of each tire is different, so as to achieve automatic flow matching, thereby suppressing the occurrence of phenomena such as skidding and loss of control of downhill speed, reducing the complexity of the control system, and greatly improving controllability.

Description

Technical Field

[0001] The invention relates to the technical field of support transport vehicles in coal mines, and in particular to an anti-skidding hydraulic closed walking system on a support transport vehicle. Background Art

[0002] At present, my country's large-scale fully-mechanized caving working faces are developing rapidly, but the backward moving methods have seriously affected the moving progress, coal output efficiency and working face connection time, and the safety situation is severe. Therefore, it has become an urgent problem to develop safe moving technology suitable for large-scale fully-mechanized caving working faces and corresponding supporting fast moving equipment to improve the overall moving level of equipment in my country's large-scale fully-mechanized caving working faces.

[0003] As we all know, the support carrier is a vehicle used to transport hydraulic supports and some heavy equipment underground in coal mines. It is an effective equipment for realizing rapid moving of working faces, and has the advantages of large load capacity, fast running speed, flexible mobility, and large climbing grade. The support carrier can realize non-transfer transportation, save a large number of auxiliary transportation personnel, greatly improve transportation efficiency, and when the working face equipment is transported, the support carrier can be used as a general underground multi-functional public transport vehicle. In the actual operation of the support carrier, a walking closed drive system is usually adopted. Due to the different ground adhesion of each tire, uneven flow distribution often occurs, causing slippage. In addition, when driving downhill, due to the effect of gravity, the walking speed gradually increases, the speed of the hydraulic motor accelerates, and the walking hydraulic motor is converted into a pump working condition, causing the downhill speed to be out of control and the body to swing. For example, in the existing patent document (CN104061212B), an electro-hydraulic control walking system for a support carrier is disclosed. Although it improves the engine efficiency of the walking system and prevents slippage and downhill speed out of control, the control algorithm is complex, and the use of electronic control technology underground has safety hazards.

[0004] Therefore, it is necessary to improve the existing technology. Summary of the invention

[0005] In view of the above-mentioned problems and shortcomings in the prior art, the present invention provides a hydraulic closed travel system for preventing skidding on a support transporter. Through the regulating effect of a pressure compensation valve group, the flow through each hydraulic motor is adjusted when the ground adhesion of each tire is different, so as to achieve automatic flow matching, thereby suppressing the occurrence of skidding and loss of control of downhill speed, reducing the complexity of the control system and greatly improving controllability.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A hydraulic closed travel system for preventing skidding on a support transporter includes a power source, a closed hydraulic pump, an oil replenishing pump, an oil replenishing safety valve, an oil replenishing one-way valve group, an overflow valve group and a travel hydraulic motor group. The power source, the closed hydraulic pump, the oil replenishing pump and the oil replenishing safety valve are connected in sequence, and also includes a pressure compensation valve group. The overflow valve group and the travel hydraulic motor group are connected through the pressure compensation valve group.

[0008] Further, the closed hydraulic pump can drive two or more travel hydraulic motors at the same time, and the closed hydraulic pump controls the running direction of the travel hydraulic motor according to the operation instruction. When there are two oil replenishment check valve groups, namely the second oil replenishment check valve and the second oil replenishment check valve; there are two overflow valve groups, namely the first overflow valve and the second overflow valve; and there are two travel hydraulic motor groups, namely the first travel hydraulic motor and the second travel hydraulic motor; and there are four overpressure compensation valve groups, namely the first pressure compensation valve, the second pressure compensation valve, the third pressure compensation valve and the fourth pressure compensation valve; wherein:

[0009] It also includes a first pressure compensating valve, a second pressure compensating valve, a third pressure compensating valve and a fourth pressure compensating valve; wherein:

[0010] The oil port A of the first pressure compensation valve is connected to the oil port M of the closed hydraulic pump, and the oil port B is connected to the oil port I of the first travel hydraulic motor. The upper control chamber of the first pressure compensation valve is connected to its oil port A, and the lower control chamber is connected to its oil port B.

[0011] The oil port C of the second pressure compensation valve is connected to the oil port N of the closed hydraulic pump, and the oil port D is connected to the oil port J of the first travel hydraulic motor. The upper control chamber of the second pressure compensation valve is connected to its oil port D, and the lower control chamber is connected to its oil port C;

[0012] The oil port E of the third pressure compensating valve is connected to the oil port M of the closed hydraulic pump, and the oil port F is connected to the oil port K of the second travel hydraulic motor. The upper control chamber of the third pressure compensating valve is connected to its oil port E, and the lower control chamber is connected to its oil port F;

[0013] The oil port G of the IV pressure compensating valve is connected to the oil port N of the closed hydraulic pump, and the oil port H is connected to the oil port L of the II travel hydraulic motor. The upper control chamber of the IV pressure compensating valve is connected to its oil port H, and the lower control chamber is connected to its oil port G.

[0014] Further, the closed hydraulic pump can drive two or more travel hydraulic motors at the same time, and the closed hydraulic pump controls the running direction of the travel hydraulic motor according to the operation instruction. When there are two oil replenishment check valve groups, namely the second oil replenishment check valve and the second oil replenishment check valve; there are two overflow valve groups, namely the first overflow valve and the second overflow valve; and there are three travel hydraulic motor groups, namely the I travel hydraulic motor, the II travel hydraulic motor and the III travel hydraulic motor; and there are six overpressure compensation valve groups, namely the I pressure compensation valve, the II pressure compensation valve, the III pressure compensation valve, the IV pressure compensation valve, the V pressure compensation valve and the VI pressure compensation valve; wherein:

[0015] The oil port A of the first pressure compensation valve is connected to the oil port M of the closed hydraulic pump, and the oil port B is connected to the oil port I of the first travel hydraulic motor. The upper control chamber of the first pressure compensation valve is connected to its oil port A, and the lower control chamber is connected to its oil port B.

[0016] The oil port C of the second pressure compensation valve is connected to the oil port N of the closed hydraulic pump, and the oil port D is connected to the oil port J of the first travel hydraulic motor. The upper control chamber of the second pressure compensation valve is connected to its oil port D, and the lower control chamber is connected to its oil port C;

[0017] The oil port E of the third pressure compensating valve is connected to the oil port M of the closed hydraulic pump, and the oil port F is connected to the oil port K of the second travel hydraulic motor. The upper control chamber of the third pressure compensating valve is connected to its oil port E, and the lower control chamber is connected to its oil port F;

[0018] The oil port G of the IV pressure compensating valve is connected to the oil port N of the closed hydraulic pump, and the oil port H is connected to the oil port L of the II travel hydraulic motor. The upper control chamber of the IV pressure compensating valve is connected to its oil port H, and the lower control chamber is connected to its oil port G;

[0019] The oil port O of the Vth pressure compensating valve is connected to the oil port M of the closed hydraulic pump, and the oil port P is connected to the oil port U of the IIIth travel hydraulic motor. The upper control chamber of the Vth pressure compensating valve is connected to its oil port O, and the lower control chamber is connected to its oil port P;

[0020] The oil port Q of the VI pressure compensating valve is connected with the oil port N of the closed hydraulic pump, and the oil port S is connected with the oil port V of the III travel hydraulic motor. The upper control chamber of the VI pressure compensating valve is connected with its oil port S, and the lower control chamber is connected with its oil port Q.

[0021] The anti-skid hydraulic closed walking system of the support transporter described in the present invention will automatically adjust the valve opening of the pressure compensation valve according to the different ground adhesion, so that the flow through the motor is maintained at the set flow, and reasonably distribute the flow through each hydraulic motor to achieve flow self-matching, thereby preventing the slipping hydraulic motor from rotating too fast and causing tire slippage, and keeping the tire speed stable.

[0022] Compared with the prior art, the above technical solution of the present invention has the following advantages and positive effects:

[0023] First, through the regulation of the pressure compensation valve, when the ground adhesion of each tire is different, the flow through each hydraulic motor is adjusted to maintain the flow through the motor at the set flow, and the flow through each hydraulic motor is reasonably distributed to achieve flow self-matching, preventing the occurrence of slipping and loss of control of downhill speed.

[0024] Second, the system adopts full hydraulic drive, which reduces the complexity of the control system and greatly improves controllability;

[0025] Third, this system is not only suitable for support transport vehicles, but can also be used to drive various other existing mainframes that use closed hydraulic travel systems, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the principle structure diagram of the system of the present invention;

[0027] Figure 2 is a system principle structure diagram of the first embodiment of the present invention;

[0028] Figure 3 It is a system principle structure diagram of the second embodiment of the present invention.

[0029] In the figure: 1, power source; 2, closed hydraulic pump; 3, oil replenishment pump; 4, oil replenishment safety valve; 5, oil replenishment check valve group; 6, overflow valve group; 7, pressure compensation valve group; 8, travel hydraulic motor group; 5a, second oil replenishment check valve; 5b, second oil replenishment check valve; 6a, first overflow valve; 6b, second overflow valve; 7a, first pressure compensation valve; 7b, second pressure compensation valve; 7c, third pressure compensation valve; 7d, fourth pressure compensation valve; 7e, fifth pressure compensation valve; 7f, sixth pressure compensation valve; 8a, first travel hydraulic motor; 8b, second travel hydraulic motor; 8c, third travel hydraulic motor. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0033] See also Figure 1 As shown in the figure, a hydraulic closed travel system for preventing skidding on a support transporter includes a power source 1, a closed hydraulic pump 2, an oil replenishing pump 3, an oil replenishing safety valve 4, an oil replenishing one-way valve group 5, an overflow valve group 6 and a travel hydraulic motor group 8. The power source 1, the closed hydraulic pump 2, the oil replenishing pump 3 and the oil replenishing safety valve 4 are connected in sequence, and also include a pressure compensation valve group 7. The overflow valve group 6 and the travel hydraulic motor group 8 are connected through the pressure compensation valve group 7. The closed hydraulic pump 2 can drive two or more travel hydraulic motors at the same time, and the closed hydraulic 2 controls the running direction of the travel hydraulic motor according to the operation instruction. Example

[0034] like Figure 1As shown, a hydraulic closed travel system for preventing skidding on a support transporter includes a power source 1, a closed hydraulic pump 2, an oil replenishment pump 3, an oil replenishment safety valve 4, an oil replenishment check valve group 5, an overflow valve group 6 and a travel hydraulic motor group 8. The power source 1, the closed hydraulic pump 2, the oil replenishment pump 3 and the oil replenishment safety valve 4 are connected in sequence, and also include a pressure compensation valve group 7. The overflow valve group 6 and the travel hydraulic motor group 8 are connected through the pressure compensation valve group 7. The oil replenishment check valve group 5 has two, namely, the second oil replenishment check valve 5a and the second oil replenishment check valve 5b; the overflow valve group 6 has two, namely, the first overflow valve 6a and the second overflow valve 6b; and the travel hydraulic motor group 8 has two, namely, the first travel hydraulic motor 8a and the second travel hydraulic motor 8b; and the overpressure compensation valve group 7 has four, namely, the first pressure compensation valve 7a, the second pressure compensation valve 7b, the third pressure compensation valve 7c and the fourth pressure compensation valve 7d; wherein:

[0035] The oil port A of the first pressure compensation valve 7a is connected to the oil port M of the closed hydraulic pump 2, and the oil port B is connected to the oil port I of the first travel hydraulic motor 8a. The upper control chamber of the first pressure compensation valve 7a is connected to its oil port A, and the lower control chamber is connected to its oil port B.

[0036] The oil port C of the second pressure compensation valve 7b is connected to the oil port N of the closed hydraulic pump 2, and the oil port D is connected to the oil port J of the first travel hydraulic motor 8a. The upper control chamber of the second pressure compensation valve 7b is connected to its oil port D, and the lower control chamber is connected to its oil port C;

[0037] The oil port E of the third pressure compensation valve 7c is connected to the oil port M of the closed hydraulic pump 2, and the oil port F is connected to the oil port K of the second travel hydraulic motor 8b. The upper control chamber of the third pressure compensation valve 7c is connected to its oil port E, and the lower control chamber is connected to its oil port F.

[0038] The oil port G of the IV pressure compensating valve 7d is connected to the oil port N of the closed hydraulic pump 2, and the oil port H is connected to the oil port L of the II travel hydraulic motor 8b. The upper control chamber of the IV pressure compensating valve 7d is connected to its oil port H, and the lower control chamber is connected to its oil port G;

[0039] In the present invention, the valve openings of the pressure compensation valves 7a, 7b, 7c and 7d are automatically adjusted according to the different ground adhesion, so that the flow through the motor is maintained at the set flow, and the flow through each hydraulic motor is reasonably distributed to achieve flow self-matching, thereby preventing the hydraulic motor from spinning too fast and causing tire slippage, and maintaining a stable tire speed.

[0040] Furthermore, the closed hydraulic pump 2 can drive two or more travel hydraulic motors at the same time, and the closed hydraulic pump controls the running direction of the travel hydraulic motor according to the operation instruction. Example

[0041] like Figure 3 As shown, a hydraulic closed travel system for preventing skidding on a support transporter includes a power source 1, a closed hydraulic pump 2, an oil replenishment pump 3, an oil replenishment safety valve 4, an oil replenishment one-way valve group 5, an overflow valve group 6 and a travel hydraulic motor group 8. The power source 1, the closed hydraulic pump 2, the oil replenishment pump 3 and the oil replenishment safety valve 4 are connected in sequence, and also includes a pressure compensation valve group 7. The overflow valve group 6 and the travel hydraulic motor group 8 are connected through the pressure compensation valve group 7; the oil replenishment one-way valve group 5 has two, namely, the second oil replenishment one-way valve group 5 and the second oil replenishment one-way valve group 5. The first and second oil replenishment check valves 5a and 5b are provided; the overflow valve group 6 has two, namely the first overflow valve 6a and the second overflow valve 6b; and the travel hydraulic motor group 8 has three, namely the first travel hydraulic motor 8a, the second travel hydraulic motor 8b and the third travel hydraulic motor 8c; and the overpressure compensation valve group 7 has six, namely the first pressure compensation valve 7a, the second pressure compensation valve 7b, the third pressure compensation valve 7c, the fourth pressure compensation valve 7d, the fifth pressure compensation valve 7e and the sixth pressure compensation valve 7f; wherein:

[0042] The oil port A of the first pressure compensation valve 7a is connected to the oil port M of the closed hydraulic pump 2, and the oil port B is connected to the oil port I of the first travel hydraulic motor 8a. The upper control chamber of the first pressure compensation valve 7a is connected to its oil port A, and the lower control chamber is connected to its oil port B.

[0043] The oil port C of the second pressure compensation valve 7b is connected to the oil port N of the closed hydraulic pump 2, and the oil port D is connected to the oil port J of the first travel hydraulic motor 8a. The upper control chamber of the second pressure compensation valve 7b is connected to its oil port D, and the lower control chamber is connected to its oil port C;

[0044] The oil port E of the third pressure compensation valve 7c is connected to the oil port M of the closed hydraulic pump 2, and the oil port F is connected to the oil port K of the second travel hydraulic motor 8b. The upper control chamber of the third pressure compensation valve 7c is connected to its oil port E, and the lower control chamber is connected to its oil port F.

[0045] The oil port G of the IV pressure compensating valve 7d is connected to the oil port N of the closed hydraulic pump 2, and the oil port H is connected to the oil port L of the II travel hydraulic motor 8b. The upper control chamber of the IV pressure compensating valve 7d is connected to its oil port H, and the lower control chamber is connected to its oil port G.

[0046] The oil port O of the V pressure compensating valve 7e is connected to the oil port M of the closed hydraulic pump 2, and the oil port P is connected to the oil port U of the III travel hydraulic motor 8c. The upper control chamber of the V pressure compensating valve 7e is connected to its oil port O, and the lower control chamber is connected to its oil port P;

[0047] The oil port Q of the VI pressure compensating valve 7f is connected with the oil port N of the closed hydraulic pump 2, and the oil port S is connected with the oil port V of the III travel hydraulic motor 8c. The upper control chamber of the VI pressure compensating valve 7f is connected with its oil port S, and the lower control chamber is connected with its oil port Q.

[0048] In the present invention, the valve openings of the pressure compensation valves 7a, 7b, 7c and 7d are automatically adjusted according to the different ground adhesion, so that the flow through the motor is maintained at the set flow, and the flow through each hydraulic motor is reasonably distributed to achieve flow self-matching, thereby preventing the hydraulic motor from spinning too fast and causing tire slippage, and maintaining a stable tire speed.

[0049] It should be noted that, although the above embodiments have been described in this article, the scope of patent protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the patent of the present invention.

Claims

1. A hydraulic closed travel system for preventing skidding on a support transport vehicle, comprising a power source (1), a closed hydraulic pump (2), an oil replenishment pump (3), an oil replenishment safety valve (4), an oil replenishment check valve group (5), a relief valve group (6) and a travel hydraulic motor group (8), characterized in that: It also includes a pressure compensation valve group (7), and the overflow valve group (6) and the travel hydraulic motor group (8) are connected via the pressure compensation valve group (7); The oil replenishment check valve group (5) has two, namely, a first oil replenishment check valve (5a) and a second oil replenishment check valve (5b); the overflow valve group (6) has two, namely, a first overflow valve (6a) and a second overflow valve (6b); and the travel hydraulic motor group (8) has two, namely, a first travel hydraulic motor (8a) and a second travel hydraulic motor (8b); and the overpressure compensation valve group (7) has four, namely, a first pressure compensation valve (7a), a second pressure compensation valve (7b), a third pressure compensation valve (7c) and a fourth pressure compensation valve (7d); wherein: The oil port A of the first pressure compensating valve (7a) is connected to the oil port M of the closed hydraulic pump (2), and the oil port B is connected to the oil port I of the first travel hydraulic motor (8a); the upper control chamber of the first pressure compensating valve (7a) is connected to its oil port A, and the lower control chamber is connected to its oil port B; The oil port C of the second pressure compensation valve (7b) is connected to the oil port N of the closed hydraulic pump (2), and the oil port D is connected to the oil port J of the first travel hydraulic motor (8a); the upper control chamber of the second pressure compensation valve (7b) is connected to its oil port D, and the lower control chamber is connected to its oil port C; The oil port E of the third pressure compensating valve (7c) is connected to the oil port M of the closed hydraulic pump (2), and the oil port F is connected to the oil port K of the second travel hydraulic motor (8b); the upper control chamber of the third pressure compensating valve (7c) is connected to its oil port E, and the lower control chamber is connected to its oil port F; The oil port G of the IV pressure compensating valve (7d) is connected to the oil port N of the closed hydraulic pump (2), and the oil port H is connected to the oil port L of the II travel hydraulic motor (8b); the upper control chamber of the IV pressure compensating valve (7d) is connected to its oil port H, and the lower control chamber is connected to its oil port G.

2. The anti-skid hydraulic closed travel system on the support transporter according to claim 1, characterized in that: The oil replenishment check valve group (5) has two, namely, a first oil replenishment check valve (5a) and a second oil replenishment check valve (5b); the overflow valve group (6) has two, namely, a first overflow valve (6a) and a second overflow valve (6b); and the travel hydraulic motor group (8) has three, namely, the first travel hydraulic motor (8a), the second travel hydraulic motor (8b) and the third travel hydraulic motor (8c); and the overpressure compensation valve group (7) has six, namely, the first pressure compensation valve (7a), the second pressure compensation valve (7b), the third pressure compensation valve (7c), the fourth pressure compensation valve (7d), the fifth pressure compensation valve (7e) and the sixth pressure compensation valve (7f); wherein: The oil port A of the first pressure compensating valve (7a) is connected to the oil port M of the closed hydraulic pump (2), and the oil port B is connected to the oil port I of the first travel hydraulic motor (8a); the upper control chamber of the first pressure compensating valve (7a) is connected to its oil port A, and the lower control chamber is connected to its oil port B; The oil port C of the second pressure compensation valve (7b) is connected to the oil port N of the closed hydraulic pump (2), and the oil port D is connected to the oil port J of the first travel hydraulic motor (8a); the upper control chamber of the second pressure compensation valve (7b) is connected to its oil port D, and the lower control chamber is connected to its oil port C; The oil port E of the third pressure compensating valve (7c) is connected to the oil port M of the closed hydraulic pump (2), and the oil port F is connected to the oil port K of the second travel hydraulic motor (8b); the upper control chamber of the third pressure compensating valve (7c) is connected to its oil port E, and the lower control chamber is connected to its oil port F; The oil port G of the IV pressure compensating valve (7d) is connected to the oil port N of the closed hydraulic pump (2), and the oil port H is connected to the oil port L of the II travel hydraulic motor (8b); the upper control chamber of the IV pressure compensating valve (7d) is connected to its oil port H, and the lower control chamber is connected to its oil port G; The oil port O of the V pressure compensating valve (7e) is connected to the oil port M of the closed hydraulic pump (2), and the oil port P is connected to the oil port U of the III travel hydraulic motor (8c); the upper control chamber of the V pressure compensating valve (7e) is connected to its oil port O, and the lower control chamber is connected to its oil port P; The oil port Q of the VI pressure compensating valve (7f) is connected to the oil port N of the closed hydraulic pump (2), and the oil port S is connected to the oil port V of the III travel hydraulic motor (8c). The upper control chamber of the VI pressure compensating valve (7f) is connected to its oil port S, and the lower control chamber is connected to its oil port Q.

Images