Anti-jamming gear pump for compressor

Abstract

The utility model relates to an anti-jamming gear pump for a compressor. The water pump comprises a driving pump gear shaft, a driven pump gear shaft, a pump shell, a first bearing, a second bearing, a third bearing, a fourth bearing, a front cover plate and a rear cover plate, a pump shell cavity is formed in the pump shell, the driven pump gear shaft is meshed with the driving pump gear shaft, and the water pump is characterized by further comprising a copper alloy pad, a first pressure sensor and a second pressure sensor; the copper alloy pad is fixed to the inner wall of the input side of a pump shell cavity, a first pressure control hole and a second pressure control hole are formed in the top and the bottom of the pump shell respectively, and the first pressure control hole and the second pressure control hole are both communicated with the pump shell cavity in the pump shell. The first pressure sensor and the second pressure sensor are installed on the first pressure control hole and the second pressure control hole respectively. According to the utility model, the blocking phenomenon caused by collision between the end surface of the gear shaft and the inner wall surface of the input side of the pump shell cavity can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to an anti-jamming gear pump for a compressor, belonging to the technical field of anti-jamming gear pumps. Background Art

[0002] A pair of gear shafts are usually provided in a gear pump. During operation, the pair of gear shafts will generate opposite axial forces. Under normal conditions, the axial force is borne by the bearings in the gear pump. However, under some special conditions, such as certain conditions in the compressor field, the axial force may increase sharply and exceed the rated load of the bearing, causing the gear shaft to be instantly displaced in the axial direction, thereby causing the end face of the gear shaft to collide with the inner wall surface of the input side of the pump casing cavity. There will be fusion and coking at the collision point of the inner wall surface, which can easily cause the gear pump to jam during operation.

[0003] At present, the solution usually adopted to solve the problem of the gear pump getting stuck during operation is to replace the bearing with a larger axial force. However, such a solution is expensive, increases the structural complexity of the gear pump, and is difficult to operate. Most importantly, there is still a great risk of getting stuck. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide an anti-jamming gear pump for a compressor which has a reasonable structural design, reliable performance and can effectively avoid the jamming phenomenon caused by the collision between the end face of the gear shaft and the inner wall surface on the input side of the pump housing cavity.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is as follows: the anti-seizing gear pump for the compressor comprises an active pump gear shaft, a driven pump gear shaft, a pump casing, a No. 1 bearing, a No. 2 bearing, a No. 3 bearing, a No. 4 bearing, a front cover plate and a rear cover plate, a pump casing cavity is arranged inside the pump casing, the active pump gear shaft is rotatably mounted in the pump casing cavity of the pump casing through the No. 1 bearing and the No. 2 bearing, the input end of the active pump gear shaft extends outside the pump casing, the driven pump gear shaft is rotatably mounted in the pump casing cavity of the pump casing through the No. 3 bearing and the No. 4 bearing, the driven pump gear shaft and the active pump gear shaft are ..., the driven pump gear shaft and the active pump gear shaft are rotatably mounted in the pump casing cavity of the pump casing through the No. 3 The gear shaft is meshed, and the front cover plate and the rear cover plate are respectively fixed on the pump casing shaft extension side and the rear side of the pump casing of the pump casing. Its structural characteristics are: it also includes a copper alloy pad, a No. 1 pressure sensor and a No. 2 pressure sensor, and the copper alloy pad is fixed on the inner wall of the input side of the pump casing cavity. The top and bottom of the pump casing are respectively provided with a No. 1 pressure control hole and a No. 2 pressure control hole, and the No. 1 pressure control hole and the No. 2 pressure control hole are both connected to the pump casing cavity inside the pump casing, and the No. 1 pressure sensor and the No. 2 pressure sensor are respectively installed on the No. 1 pressure control hole and the No. 2 pressure control hole.

[0006] Preferably, the utility model further comprises a No. 5 bearing, the input end of the active pump gear shaft is mounted on the pump casing shaft extension side of the pump casing through the No. 5 bearing, and the front cover plate cooperates with the No. 5 bearing.

[0007] Preferably, the copper alloy pad of the utility model is embedded and fixed on the inner wall of the input side of the pump casing cavity.

[0008] Preferably, the end faces of the active pump gear shaft and the driven pump gear shaft facing the inner wall of the pump housing cavity input side are both tapered. The tapered structure will make the active pump gear shaft and the driven pump gear shaft form line contact instead of surface contact when they collide or instantaneously contact with the inner wall of the pump housing cavity input side, making it less likely for the contact surface to fuse or coke.

[0009] Preferably, the active pump gear shaft and the driven pump gear shaft of the utility model are made of iron. The materials of the active pump gear shaft and the driven pump gear shaft are different from the materials of the copper alloy pad fixed to the inner wall of the input side of the pump housing cavity. When the active pump gear shaft and the driven pump gear shaft collide or contact with the inner wall of the input side of the pump housing cavity instantaneously, the contact surface is less likely to fuse or coke.

[0010] Compared with the prior art, the utility model has the following advantages and effects: simple structure, reasonable design, a No. 1 pressure control hole and a No. 2 pressure control hole are provided on the pump casing, and the No. 1 pressure sensor and the No. 2 pressure sensor are used to control the pressure difference in the pump casing cavity to be consistent, and to accurately control the spatial relative position of the active pump gear shaft and the driven pump gear shaft during operation by adjusting the pressure. The copper alloy pad is fixed to the inner wall of the input side of the pump casing cavity. When the active pump gear shaft and the driven pump gear shaft collide or contact with the inner wall of the input side of the pump casing cavity instantaneously, the contact surface is not easy to fuse or coke, so that the machine will not jam. The gear pump of the utility model has a simple heat treatment process, a small size, a low manufacturing cost, is easy to process, has a long service life, and is convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the drawings required for use in the embodiments and / or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of an anti-seizure gear pump for a compressor in an embodiment of the utility model.

[0013] In the figure: 1-driving pump gear shaft; 2-driven pump gear shaft; 3-pump casing; 4-bearing No. 1; 5-bearing No. 2; 6-bearing No. 3; 7-bearing No. 4; 8-bearing No. 5; 9-copper alloy pad; 10-front cover plate; 11-rear cover plate; 31-inner wall of the pump casing cavity input side; 32-pressure control hole No. 1; 33-pressure control hole No. 2; 34-axle extension side of the pump casing; 35-rear side of the pump casing. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0015] Example

[0016] See also Figure 1 The anti-seizure gear pump for the compressor in this embodiment includes an active pump gear shaft 1, a driven pump gear shaft 2, a pump housing 3, a No. 1 bearing 4, a No. 2 bearing 5, a No. 3 bearing 6, a No. 4 bearing 7, a No. 5 bearing 8, a copper alloy pad 9, a front cover plate 10, a rear cover plate 11, a No. 1 pressure sensor and a No. 2 pressure sensor, wherein the active pump gear shaft 1 and the driven pump gear shaft 2 are usually made of iron.

[0017] The pump casing 3 in this embodiment is provided with a pump casing cavity inside, the active pump gear shaft 1 is rotatably mounted in the pump casing cavity of the pump casing 3 through the No. 1 bearing 4 and the No. 2 bearing 5, the active pump gear shaft 1 can rotate, and the input end of the active pump gear shaft 1 extends outside the pump casing 3, the driven pump gear shaft 2 is rotatably mounted in the pump casing cavity of the pump casing 3 through the No. 3 bearing 6 and the No. 4 bearing 7, the driven pump gear shaft 2 can rotate, the driven pump gear shaft 2 is meshed with the active pump gear shaft 1, and the rotation of the active pump gear shaft 1 can drive the driven pump gear shaft 2 to rotate, the front cover plate 10 and the rear cover plate 11 are respectively fixed on the pump casing shaft extension side 34 and the pump casing rear side 35 of the pump casing 3, the input end of the active pump gear shaft 1 is mounted on the pump casing shaft extension side 34 of the pump casing 3 through the No. 5 bearing 8, and the front cover plate 10 and the No. 5 bearing 8 cooperate.

[0018] The copper alloy pad 9 in this embodiment is embedded and fixed on the inner wall 31 of the pump housing cavity input side. When the active pump gear shaft 1 and the driven pump gear shaft 2 collide with the inner wall 31 of the pump housing cavity input side, it is not easy to produce fusion and coking phenomenon, so there will be no jamming phenomenon, because the active pump gear shaft 1 and the driven pump gear shaft 2 collide with the copper alloy pad 9. The top and bottom of the pump housing 3 are respectively provided with a No. 1 pressure control hole 32 and a No. 2 pressure control hole 33, which are both connected to the pump housing cavity inside the pump housing 3, and the No. 1 pressure sensor and the No. 2 pressure sensor are respectively installed on the No. 1 pressure control hole 32 and the No. 2 pressure control hole 33. The top and bottom of the pump housing 3 are respectively provided with a No. 1 pressure control hole 32 and a No. 2 pressure control hole 33, which is conducive to ensuring the spatial position of the active pump gear shaft 1 and the driven pump gear shaft 2 in the pump housing 3 through a more convenient pressure difference control principle.

[0019] Typically, the end surfaces of the active pump gear shaft 1 and the driven pump gear shaft 2 facing the inner wall 31 on the input side of the pump housing cavity are both tapered structures.

[0020] When the gear pump is running, the lubricating oil enters from the oil inlet of the pump housing 3, and the active pump gear shaft 1 and the driven pump gear shaft 2 make a rotational motion, and the lubricating oil is sent to the outlet of the pump housing 3 by extrusion.

[0021] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. An anti-seizure gear pump for a compressor, comprising a driving pump gear shaft (1), a driven pump gear shaft (2), a pump housing (3), a first bearing (4), a second bearing (5), a third bearing (6), a fourth bearing (7), a front cover plate (10) and a rear cover plate (11), wherein a pump housing cavity is provided inside the pump housing (3), the driving pump gear shaft (1) is rotatably mounted in the pump housing cavity of the pump housing (3) via the first bearing (4) and the second bearing (5), an input end of the driving pump gear shaft (1) extends outside the pump housing (3), the driven pump gear shaft (2) is rotatably mounted in the pump housing cavity of the pump housing (3) via the third bearing (6) and the fourth bearing (7), the driven pump gear shaft (2) is meshed with the driving pump gear shaft (1), the front cover plate (10) and the rear cover plate (11) are respectively fixed to the pump housing shaft extension side (34) and the pump housing rear side (35) of the pump housing (3), characterized in that: The pump housing (3) further comprises a copper alloy pad (9), a first pressure sensor and a second pressure sensor, wherein the copper alloy pad (9) is fixed to the inner wall (31) on the input side of the pump housing cavity, and the top and bottom of the pump housing (3) are respectively provided with a first pressure control hole (32) and a second pressure control hole (33), wherein the first pressure control hole (32) and the second pressure control hole (33) are both connected to the pump housing cavity inside the pump housing (3), and the first pressure sensor and the second pressure sensor are respectively mounted on the first pressure control hole (32) and the second pressure control hole (33).

2. The anti-seizure gear pump for a compressor according to claim 1, characterized in that: It also includes a No. 5 bearing (8), the input end of the active pump gear shaft (1) is mounted on the pump casing shaft extension side (34) of the pump casing (3) through the No. 5 bearing (8), and the front cover plate (10) and the No. 5 bearing (8) are matched.

3. The anti-seizure gear pump for a compressor according to claim 1, characterized in that: The copper alloy gasket (9) is embedded and fixed on the inner wall (31) on the input side of the pump casing cavity.

4. The anti-seizure gear pump for a compressor according to claim 1, characterized in that: The end surfaces of the active pump gear shaft (1) and the driven pump gear shaft (2) facing the inner wall (31) on the input side of the pump casing cavity are both of tapered structures.

5. The anti-seizure gear pump for a compressor according to claim 1, characterized in that: The active pump gear shaft (1) and the driven pump gear shaft (2) are both made of iron.

Images