High-efficiency pump unit

Abstract

The utility model is applicable to the field of mechanical engineering, and provides a high-efficiency pump unit which comprises a pump body and further comprises a plunger, an oil inlet, an oil outlet and a plunger cavity which are communicated with each other are arranged in the pump body, the oil inlet is communicated with the middle of the plunger cavity, and the oil outlet is communicated with one end of the plunger cavity; the plunger is connected into the plunger cavity in a sliding mode, the plunger is sleeved with a reset spring, one end of the reset spring is connected with the pump body, and the other end of the reset spring is connected with the end, away from the pump body, of the plunger; a steel ball, a pump body one-way valve seat, a one-way valve spring and a one-way valve nut are sequentially arranged in the oil outlet from the end close to the plunger cavity. According to the utility model, through improvement, a rubber gasket is used at the top end of the one-way valve seat instead of being matched with the steel ball and the one-way valve seat of the pump body, so that high performance, high pressure support, high impurity resistance and long service life are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical engineering, and in particular relates to a high-efficiency pump unit. Background Art

[0002] In the current lubrication industry, the plunger pump is one of the core components of the lubrication machine. It is generally composed of a pump body, a plunger and a spring to form a pump unit. The plunger makes reciprocating motion inside the pump body, causing the volume inside the pump body to change to achieve oil suction and oil discharge.

[0003] At present, most of the internal designs of pump units on the market use a one-way valve seat plus a rubber gasket and a plunger without a pressure equalization groove, which cannot meet the complex on-site usage conditions. They are easily damaged under high-pressure conditions or when the oil quality is poor and there are impurities, and cannot meet the usage requirements. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a high-efficiency pump unit, aiming to solve the problem that the one-way valve seat plus rubber gasket and the plunger without pressure equalizing groove cannot well meet the use conditions in complex on-site environments.

[0005] The utility model is implemented as follows: a high-efficiency pump unit comprises a pump body and also comprises: a plunger, wherein the pump body is provided with a connected oil inlet, an oil outlet and a plunger cavity, the oil inlet is connected with the middle part of the plunger cavity, and the oil outlet is connected with one end of the plunger cavity; the plunger is slidably connected in the plunger cavity, a return spring is sleeved on the plunger, one end of the return spring is connected with the pump body, and the other end of the return spring is connected with the end of the plunger away from the pump body; a steel ball, a pump body one-way valve seat, a one-way valve spring and a one-way valve nut are sequentially arranged in the oil outlet from the end close to the plunger cavity.

[0006] According to a further technical solution, the one-way valve nut is threadedly connected in the plunger cavity, a pump body one-way valve seat is provided through the one-way valve nut, and a clearance is formed between the pump body one-way valve seat and the one-way valve nut.

[0007] According to a further technical solution, a plurality of oil inlets are evenly arranged on the side wall of the pump body.

[0008] According to a further technical solution, a pressure equalizing groove is provided on the side wall of one end of the plunger located in the plunger cavity.

[0009] According to a further technical solution, one end of the plunger away from the pump body is fixedly connected to a spring seat.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model provides a high-efficiency pump unit. Compared with the rubber gasket on the top of the one-way valve seat on the market, the rubber gasket is easily damaged after long-term use and is difficult to replace, and may even be directly damaged when facing highly corrosive oils. The utility model is improved from using a rubber gasket on the top of the one-way valve seat to using a steel ball and a pump body one-way valve seat, thereby achieving high performance, supporting high pressure, strong resistance to impurities and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a high-efficiency pump unit provided by the utility model;

[0013] Figure 2 The utility model provides Figure 1 Structural diagram of the main viewing angle;

[0014] Figure 3 The utility model provides Figure 2 Schematic diagram of the cross-sectional structure from a medium AA perspective.

[0015] In the attached figure: reset spring -1, one-way valve nut -2, one-way valve spring -3, pump body one-way valve seat -4, steel ball -5, pump body -6, plunger -7, spring seat -8, pressure equalizing groove -9, oil inlet -10, oil outlet -11, plunger cavity -12. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0018] like Figure 1-Figure 3 As shown, a high-efficiency pump unit provided by an embodiment of the utility model comprises a pump body 6, and also comprises: a plunger 7, wherein the pump body 6 is provided with an oil inlet 10, an oil outlet 11 and a plunger cavity 12 which are connected, wherein the oil inlet 10 is connected to the middle part of the plunger cavity 12, and the oil outlet 11 is connected to one end of the plunger cavity 12; the plunger 7 is slidably connected in the plunger cavity 12, a return spring 1 is sleeved on the plunger 7, one end of the return spring 1 is connected to the pump body 6, and the other end of the return spring 1 is connected to the end of the plunger 7 away from the pump body 6; a steel ball 5, a pump body one-way valve seat 4, a one-way valve spring 3 and a one-way valve nut 2 are sequentially arranged in the oil outlet 11 from the end close to the plunger cavity 12; the one-way valve nut 2 is threadedly connected in the plunger cavity 12, a pump body one-way valve seat 4 is penetrated in the one-way valve nut 2, and a clearance fit is provided between the pump body one-way valve seat 4 and the one-way valve nut 2.

[0019] In the embodiment of the utility model, the rotation of the right-angle motor inside the electric grease oiling machine drives the cam on the right-angle motor shaft to rotate, and the cam intermittently overcomes the elastic force of the reset spring 1 and pushes the plunger 7 to the right. When the plunger 7 moves to the right, the plunger 7 squeezes the excess butter in the plunger cavity 12 from the oil inlet 10 until the plunger 7 moves to the right side of the oil inlet 10. The plunger 7 squeezes the butter in the plunger cavity 12, and the pressure in the plunger cavity 12 increases. The high pressure in the plunger cavity 12 overcomes the elastic force of the one-way valve spring 3 and pushes the steel ball 5 and the pump body one-way valve seat 4 to the right, thereby squeezing the butter in the plunger cavity 12 into the oil outlet 11, and the butter flows to the right through the one-way valve nut 2; when the cam does not push the plunger 7, the reset spring 1 The plunger 7 is pushed to move to the left and reset, the pressure in the plunger chamber 12 becomes low, and the one-way valve spring 3 pushes the pump body one-way valve seat 4 and the steel ball 5 to move to the left, and the steel ball 5 blocks the right end of the plunger chamber 12. As the plunger 7 moves to the left, the pressure in the plunger chamber 12 decreases, and the low pressure in the plunger chamber 12 applies suction to the steel ball 5, so that the steel ball 5 tightly blocks the right end of the plunger chamber 12 until the plunger 7 moves to the left side of the oil inlet 10, and the oil inlet 10 is not blocked by the plunger 7. The suction force generated by the low pressure in the plunger chamber 12 sucks the butter from the oil inlet 10 into the plunger chamber 12, thereby completing a working cycle. The one-way valve nut 2 can be rotated to adjust the position of the one-way valve nut 2 at the oil outlet 11, thereby adjusting the elastic force (compression amount) of the one-way valve spring 3.

[0020] like Figure 1-Figure 3 As shown, as a preferred embodiment of the present utility model, a plurality of oil inlets 10 are evenly arranged on the side wall of the pump body 6 .

[0021] In the embodiment of the utility model, four oil inlets 10 are provided. By providing a plurality of oil inlets 10 , a stable oil inlet amount of the plunger cavity 12 is ensured.

[0022] like Figure 1-Figure 3 As shown, as a preferred embodiment of the present utility model, a pressure equalizing groove 9 is provided on the side wall of one end of the plunger 7 located in the plunger cavity 12 .

[0023] In the embodiment of the utility model, the pressure equalizing groove 9 of the plunger 7 is designed to make the pump unit more stable during use. When oil is introduced into the oil inlet 10, the oil volume is more even. It is less likely to cause the old plungers on the market to get stuck, the oil volume to be uneven, and the plunger to tilt during use. When facing high pressure, it is more stable and the oil output is more stable than the design without a pressure equalizing groove.

[0024] like Figure 1-Figure 3 As shown, as a preferred embodiment of the present utility model, one end of the plunger 7 away from the pump body 6 is fixedly connected to a spring seat 8.

[0025] In the embodiment of the utility model, the left side of the return spring 1 is fixed by the spring seat 8 .

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency pump unit, comprising a pump body, characterized in that: Also includes: The plunger, the pump body is provided with an oil inlet, an oil outlet and a plunger cavity which are connected, the oil inlet is connected with the middle of the plunger cavity, and the oil outlet is connected with one end of the plunger cavity; The plunger is slidably connected in the plunger cavity, a return spring is sleeved on the plunger, one end of the return spring is connected to the pump body, and the other end of the return spring is connected to the end of the plunger away from the pump body; A steel ball, a pump body one-way valve seat, a one-way valve spring and a one-way valve nut are arranged in sequence in the oil outlet from one end close to the plunger cavity.

2. The high-efficiency pump unit according to claim 1, characterized in that: The one-way valve nut is threadedly connected in the plunger cavity, a pump body one-way valve seat is penetrated in the one-way valve nut, and a clearance fit exists between the pump body one-way valve seat and the one-way valve nut.

3. The high-performance pump unit according to claim 1, characterized in that: A plurality of oil inlets are evenly arranged on the side wall of the pump body.

4. The high-performance pump unit according to claim 1, characterized in that: A pressure equalizing groove is arranged on the side wall of one end of the plunger located in the plunger cavity.

5. The high-performance pump unit according to claim 4, characterized in that: One end of the plunger away from the pump body is fixedly connected with a spring seat.

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